[go: up one dir, main page]

WO2015034168A1 - Selective catalyst reduction system - Google Patents

Selective catalyst reduction system Download PDF

Info

Publication number
WO2015034168A1
WO2015034168A1 PCT/KR2014/005793 KR2014005793W WO2015034168A1 WO 2015034168 A1 WO2015034168 A1 WO 2015034168A1 KR 2014005793 W KR2014005793 W KR 2014005793W WO 2015034168 A1 WO2015034168 A1 WO 2015034168A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
reactor
opening
closing member
catalyst
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2014/005793
Other languages
French (fr)
Korean (ko)
Inventor
이주희
천진호
김정우
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hanwha Engine Co Ltd
Original Assignee
Doosan Engine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Doosan Engine Co Ltd filed Critical Doosan Engine Co Ltd
Publication of WO2015034168A1 publication Critical patent/WO2015034168A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. by adjusting the dosing of reducing agent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/36—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an exhaust flap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/04—Exhaust treating devices having provisions not otherwise provided for for regeneration or reactivation, e.g. of catalyst
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/02—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor
    • F01N2560/022—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being an exhaust gas sensor for measuring or detecting CO or CO2
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a selective catalytic reduction system, and more particularly, to a selective catalytic reduction system capable of effectively regenerating a catalyst installed inside a reactor.
  • catalysts play an important role in the purification efficiency of exhaust gases. That is, if poisoning such as soot or foreign matter contained in the exhaust gas accumulates in the flow passage of the catalyst and blocks the flow passage, the area where the exhaust gas passes through the catalyst is reduced, thereby reducing the purification efficiency of the exhaust gas. .
  • Embodiments of the present invention provide a selective catalytic reduction system capable of effectively regenerating a catalyst located inside a reactor.
  • the selective catalytic reduction system includes a main flow path through which exhaust gas passes, a reactor disposed on the main flow path and a catalyst installed therein, and an exhaust gas installed on the main flow path and introduced into the reactor.
  • a first opening / closing member for switching gas flow a second opening / closing member installed on the main flow path to switch the flow of exhaust gas passing through the reactor, and a point between the first opening / closing member and the front end of the reactor
  • a circulation passage connecting another point between the second opening and closing member and the reactor rear end, a blower for circulating the exhaust gas between the reactor and the circulation passage, and the concentration of carbon monoxide contained in the exhaust gas passing through the catalyst.
  • a carbon monoxide sensor for detecting and controlling the first opening / closing member, the second opening / closing member, and the blower for regeneration of the catalyst
  • a control unit configured to perform a catalyst regeneration operation, wherein the control unit closes the first opening / closing member and the second opening / closing member during the catalyst regeneration operation, operates the blower, and the carbon monoxide whose preset detection value detected by the carbon monoxide sensor is preset.
  • the catalyst regeneration operation is terminated when the concentration setting value is exceeded.
  • a main flow path through which exhaust gas passes a reactor disposed on the main flow path and a catalyst installed therein, and a flow of exhaust gas installed on the main flow path and introduced into the reactor
  • Carbon monoxide sensor for detecting the carbon monoxide concentration in the exhaust gas passing through the catalyst, and a circulating flow path connecting the other point between the opening and closing member and the reactor rear end, a blower for circulating the exhaust gas between the reactor and the circulation flow path
  • control unit closes the first opening and closing member and the second opening and closing member during the catalyst regeneration operation, and operates the blower, and the control unit reduces the pressure of the exhaust gas circulating between the reactor and the circulation passage.
  • the selective catalytic reduction system may further include a flow rate sensor for detecting the flow rate of the exhaust gas circulated during the catalyst regeneration operation, the blower is rotated when the flow rate detected by the flow rate sensor is less than a predetermined flow rate value Speed can be increased.
  • the selective catalytic reduction system further comprises a heating unit for heating up the exhaust gas passing through the circulation passage and a temperature sensor for detecting the temperature of the exhaust gas circulated between the reactor and the circulation passage during the catalyst regeneration operation.
  • the heating unit may be heated when the temperature of the exhaust gas detected by the temperature sensor is less than a predetermined exhaust gas temperature value.
  • the selective catalytic reduction system can effectively regenerate the catalyst located inside the reactor.
  • FIG. 1 is a view showing a selective catalytic reduction system according to a first embodiment of the present invention.
  • Figure 2 is a graph showing the carbon monoxide concentration with time inside the reactor according to a first embodiment of the present invention.
  • FIG 3 is a flow chart showing a control sequence of the selective catalytic reduction system operation process according to the first embodiment of the present invention.
  • FIG. 4 is a graph showing carbon monoxide concentration over time in a reactor according to a second embodiment of the present invention.
  • FIG. 5 is a flowchart illustrating a control sequence of an operation of a selective catalytic reduction system according to a second embodiment of the present invention.
  • Embodiments of the invention specifically illustrate ideal embodiments of the invention. As a result, various modifications of the drawings are expected. Thus, the embodiment is not limited to the specific form of the illustrated region, but includes, for example, modification of the form by manufacture.
  • the selective catalytic reduction system 101 includes a main flow path 100 through which exhaust gas passes, and a reactor 200 in which a catalyst 210 is installed. And a first opening / closing member 310, a second opening / closing member 320, a circulation passage 400, a blower 500, a carbon monoxide sensor 610, and a controller 700.
  • the main flow path 100 passes exhaust gas generated from an internal combustion engine such as a diesel engine.
  • the main flow path 100 guides the exhaust gas to the reactor 200 and guides the purified exhaust gas to the outside through the reactor 200.
  • the reactor 200 is connected to the main flow path 100, and exhaust gas flowing through the main flow path 100 is introduced into the reactor 200.
  • the catalyst 210 installed in the reactor 200 is in contact with the exhaust gas passing through the reactor and exhausts nitrogen oxide (hereinafter referred to as NOx) included in the exhaust gas to nitrogen (N2) and water vapor (H2O). Purify the gas.
  • NOx nitrogen oxide
  • N2 nitrogen
  • H2O water vapor
  • the catalyst 210 may be formed in plural in the reactor 200.
  • the catalyst 210 used in the selective catalytic reduction system 101 according to an embodiment of the present invention may be a selective reduction catalyst that helps to remove NOx contained in the exhaust gas.
  • the first opening / closing member 310 is installed on the main flow path 100 and switches the flow of exhaust gas flowing into the reactor 200. That is, the first opening / closing member 310 may be installed on the main flow path 100 in front of the reactor 200 to switch the flow of the exhaust gas flowing into the reactor 200.
  • the second opening / closing member 320 is installed on the main flow path 100 and switches the flow of the exhaust gas passing through the reactor 200. That is, the second opening / closing member 320 may be installed on the main flow path 100 at the rear end of the reactor 200 in order to switch the flow of the exhaust gas passing through the reactor 200.
  • first opening / closing member 310 and the second opening / closing member 320 may have various types of structures capable of switching the flow of exhaust gas passing through the flow path, such as a damper or a valve.
  • the circulation passage 400 is limited to the inflow of the exhaust gas to the reactor 200 by the first opening and closing member 310, the exhaust gas passing through the reactor 200 by the second opening and closing member 320 is discharged to the outside. It guides the circulation of exhaust gas when it is limited.
  • one end of the circulation passage 400 is connected to one point between the first opening and closing member 310 and the front end of the reactor 200, and the other end is the other end between the second opening and closing member 320 and the rear end of the reactor 200. It is connected to the point to guide the circulation of exhaust gas.
  • the other end of the circulation passage 400 may be connected to the rear end of the reactor 200, and a portion of the circulation passage 400 adjacent to the rear end of the reactor 200 may be connected to the reactor 200. May be arranged adjacently.
  • the blower 500 circulates the exhaust gas between the reactor 200 and the circulation passage 400. Specifically, the blower 500 is disposed on one side of the circulation passage 400 and measures the flow rate of the exhaust gas so that the exhaust gas passing through the circulation passage 400 circulates between the reactor 200 and the circulation passage 400. Can be raised.
  • blower 500 may change the circulation flow of the exhaust gas circulating between the reactor 200 and the circulation passage 400 according to the rotation direction.
  • the carbon monoxide sensor 610 detects the concentration of carbon monoxide contained in the purified exhaust gas passing through the catalyst 210 located in the reactor 200. Specifically, the carbon monoxide sensor 610 may be installed at the rear end of the reactor 200 to detect the carbon monoxide concentration contained in the purified exhaust gas passing through the catalyst 210.
  • the carbon monoxide sensor 610 may be installed on one side of the circulation passage 400 to detect the carbon monoxide concentration contained in the purified exhaust gas passing through the catalyst 210.
  • the controller 700 controls the first opening / closing member 310, the second opening / closing member 320, and the blower 500.
  • the controller 700 closes the first opening / closing member 310 when performing the catalyst regeneration operation for regeneration of the catalyst 210 to restrict the inflow of exhaust gas generated from the internal combustion engine into the reactor 200. 2 to close the opening and closing member 320 to limit the discharge of the purified exhaust gas passing through the catalyst 210 of the reactor 200 to the outside and to operate the blower 500 between the circulating flow path 400 and the reactor 200 Allow exhaust gas to circulate.
  • the selective reduction catalyst system 101 may further include a sub flow path (110).
  • one end of the sub flow path 110 may be connected to the front end of the first opening and closing member 310.
  • the exhaust gas generated in the internal combustion engine while the controller 700 performs the catalyst regeneration operation may be discharged to the outside through the sub-channel 110. Therefore, while the control unit 700 performs the catalyst regeneration operation in which the first opening / closing member 310 is closed, the exhaust gas exhaust gas having limited inflow into the reactor 200 by the first opening / closing member 310 opens the sub-channel 110. Guide them through and out to the outside.
  • the controller 700 may perform the catalyst regeneration operation even during the operation of the facility.
  • the controller 700 may perform an exhaust gas purification operation of opening the first opening / closing member 310 and the second opening / closing member 320 and stopping the operation of the blower 500 after the catalyst regeneration operation is completed. have.
  • the start of the catalyst regeneration operation is performed by comparing the value measured at the front end of the reactor with the NOx contained in the exhaust gas by the NOx sensor installed at the front and rear of the reactor 200 and after the exhaust gas has passed the catalyst.
  • the exhaust gas purifying efficiency of the selective catalytic reduction system is determined to determine that the catalyst 210 located inside the reactor 200 is poisoned when it is below a predetermined value. Therefore, when it is determined that the catalyst 210 is poisoned, the controller 700 performs a catalyst regeneration operation.
  • the poisoning determination of the catalyst according to the first embodiment of the present invention is not limited to that determined from the exhaust gas purification efficiency of the selective catalytic reduction system detected by the NOx sensor, and is determined by various methods known to those skilled in the art. A poisoning decision can be made.
  • the set value of the carbon monoxide concentration is a predetermined value of the carbon dioxide concentration set for the selective catalytic reduction system 101 and the information is various, such as the load information according to the operation of the internal combustion engine or the flow rate, temperature, pressure of the exhaust gas.
  • the information is stored in the controller 700 by mapping the information. In addition, the information may be mapped based on the experimental data and stored in the controller 700.
  • the selective catalytic reduction system 101 may further include a flow sensor (630).
  • the flow rate sensor 630 may detect the flow rate of the exhaust gas circulated during the catalyst regeneration operation. In addition, the flow sensor 630 may detect the flow rate of the exhaust gas circulated through the blower 500.
  • the flow rate sensor 630 may be installed at one side of the circulation passage 400 to detect the flow rate of the exhaust gas circulated.
  • the blower 500 may be controlled to increase the rotation speed.
  • the blower 500 is controlled to increase the rotation speed so as to increase the flow velocity of the exhaust gas circulated by the controller 700, and when the flow rate detected by the flow sensor 630 is equal to or greater than the set flow rate value. Constant rotational speed can be maintained until the catalyst regeneration operation is completed.
  • the selective catalytic reduction system 101 may further include a heating unit 800 and a temperature sensor 620.
  • the heating unit 800 may heat up the exhaust gas passing through the circulation passage 400.
  • the heating unit 800 is controlled by the control unit 700. And, when the control unit 700 performs the catalyst regeneration operation for controlling the first opening and closing member 310, the second opening and closing member 320, and the blower 500 for the regeneration of the catalyst 210 (heating unit ( 800 also controlled.
  • the heating unit 800 may be a burner that ignites the supplied fuel to heat up the exhaust gas passing through the circulation passage 400.
  • the heating unit 800 is a burner, the amount of fuel supplied to the heating unit 800 may be increased to increase the temperature of the flame generated by the heating unit 800 so that the temperature of the exhaust gas may be increased.
  • the heating unit 800 according to the first embodiment of the present invention is not limited to the burner, and may be changed to various structures capable of heating the exhaust gas known to those skilled in the art.
  • the temperature sensor 620 may detect the temperature of the exhaust gas heated up through the heating unit 800.
  • the temperature sensor 620 may be installed at one side of the circulation passage 400 and may be disposed at the rear end of the heating unit 800 to detect the temperature of the exhaust gas passing through the heating unit 800.
  • the heating unit 800 heats up the exhaust gas passing through the circulation passage 400, and the heated exhaust gas is circulated by the blower 500 and the reactor ( 200 may be heated to raise the catalyst 210 located in the reactor 200 to remove soot or foreign matter adsorbed on the catalyst 210.
  • the heating unit 800 is controlled to increase in temperature to increase the temperature of the exhaust gas in the reactor 200.
  • the control unit 700 can effectively perform the catalyst regeneration operation.
  • the heating unit 800 is controlled to increase the temperature of the exhaust gas circulated by the control unit 700 during the catalyst regeneration operation, and the catalyst regeneration operation when the temperature detected by the temperature sensor 620 is equal to or higher than the set temperature value.
  • the temperature can be kept constant until this is completed.
  • control unit 700 of the selective catalytic reduction system 101 measures the time during which the temperature of the exhaust gas heated by the heating unit 800 maintains a constant temperature, thereby regenerating the catalyst. You can complete
  • control unit 700 controls the rotation speed of the blower 500 by the flow sensor 630, the temperature of the heating unit 800 by the temperature sensor 620, the catalyst to the carbon monoxide sensor 610 You can control the end of playback operation.
  • control unit 700 may allow the heating unit 800 to be continuously heated while comparing the detected value of the carbon monoxide concentration and the set value.
  • the selective catalytic reduction system 101 can effectively regenerate the catalyst 210 installed inside the reactor.
  • the heating unit 800 heats up the circulating exhaust gas passing through the circulation passage 400 and the heated exhaust gas is introduced into the reactor 200 to heat and regenerate the catalyst 210 to be used in a ship or a plant facility.
  • the catalyst provided in the enlarged selective catalytic reduction system can be effectively regenerated.
  • controller 700 can flexibly regenerate the catalyst regeneration operation by determining the poisoning degree of the catalyst or the progress of the catalyst regeneration operation based on the values detected from the flow rate sensor 630 and the temperature sensor 620. The operation can be terminated.
  • control unit 700 of the selective catalytic reduction system 101 according to the first embodiment of the present invention will be described.
  • the control unit 700 of the selective catalytic reduction system 101 exhausts the first opening and closing member 310 and the second opening and closing member 320 into the reactor 200 during the catalyst regeneration operation.
  • the catalyst regeneration operation is terminated when the detected value of the carbon monoxide concentration contained in the purified exhaust gas detected by the carbon monoxide sensor 610 exceeds the set value of the set carbon monoxide concentration when the pressure of the held or circulated exhaust gas is increased. .
  • the controller 700 may terminate the catalyst regeneration operation and then perform the exhaust gas purification operation.
  • control unit 700 may terminate the catalyst regeneration operation when the detection value detected by the carbon monoxide sensor 610 exceeds a set value.
  • control unit 700 is blocked by the exhaust gas flowing into the reactor 200 by the first opening and closing member 310 during the catalyst regeneration operation, the second opening and closing member 320
  • the detection of the carbon monoxide concentration detected by the carbon monoxide sensor 610 is detected.
  • the value can selectively terminate the catalyst regeneration operation.
  • the first opening / closing member 310 or the second opening / closing member having the selective catalytic reduction system 101 is installed. According to the quality of the 320 may be selected in advance by the operator.
  • the selective catalytic reduction system 101 includes a separate pressure sensor 640 is circulated by comparing the measured pressure and the set pressure value measured the pressure of the exhaust gas circulated by the control unit 700 during the catalyst regeneration operation The catalyst regeneration operation can be ended by determining whether the pressure of the exhaust gas is lowered.
  • the selective catalytic reduction system 101 according to the first embodiment of the present invention can effectively reproduce the catalyst.
  • the controller 700 closes the first opening / closing member 310 and the second opening / closing member 320 to block the exhaust gas flowing into the reactor 200 during the catalyst regeneration operation, and exhaust gas passing through the reactor 200 is moved to the outside. Blocking the discharge, the exhaust gas between the reactor 200 and the circulating flow path 400 can be circulated to the blower 500 and supplied to the catalyst 210, so that when a separate outside air is supplied, the exhaust gas temperature decreases. It is possible to prevent the catalyst regeneration efficiency from lowering.
  • the controller 700 may terminate the catalyst regeneration operation based on the detection value of the carbon monoxide contained in the purified exhaust gas that has passed through the catalyst 210 from the carbon monoxide sensor 610 to poison the catalyst. Depending on the state, the catalyst regeneration operation can be flexibly adjusted.
  • the controller after determining the poisoning of the catalyst using various known techniques, the controller starts the catalyst regeneration operation to regenerate the catalyst when the catalyst is poisoned.
  • the first switching member and the second switching member are switched to block the inflow of the exhaust gas into the reactor, and the exhaust gas passing through the reactor is prevented from being discharged to the outside to exhaust the gas between the reactor and the circulation passage. Close the opening and closing member to be circulated (S10).
  • a predetermined blower flow rate value, a heating part temperature value, a carbon monoxide concentration value, and a regeneration operation time value are determined according to the degree of poisoning of the catalyst or the load of the apparatus equipped with the selective catalytic reduction system (S20).
  • the blower is operated (S30) for catalyst regeneration. Then, the flow rate of the exhaust gas circulated by the current blower and the set blower flow rate value are compared (S31).
  • the heating unit is operated (S40).
  • the carbon monoxide concentration contained in the circulating exhaust gas that has passed through the catalyst is continuously measured.
  • the temperature of the exhaust gas heated by the heating unit is detected by a temperature sensor, and the detected exhaust gas temperature is compared with the set temperature value (S45).
  • the heating unit is operated to increase the exhaust gas temperature (S40).
  • the time at which the exhaust gas is circulated with the set temperature value increase is compared with the set time value (S50).
  • the time is increased until the circulation time of the exhaust gas exceeds the set time value and the circulation time of the exhaust gas exceeds the set time value.
  • control unit can effectively determine the end point of the catalytic regeneration operation of the selective reduction system by the carbon monoxide sensor, the flow sensor, the temperature sensor, and the circulation time.
  • control unit 700 of the selective catalytic reduction system 101 according to the second embodiment of the present invention will be described.
  • the configuration of the selective catalytic reduction system except for the role of the control unit 700 is the same as that of the first embodiment.
  • the control unit 700 detects that the carbon dioxide concentration detected by the carbon monoxide sensor 610 is again detected after the carbon dioxide concentration detected by the carbon monoxide sensor 610 of the reactor 200 and the circulation passage 400 exceeds a set value. When it is lower than the set value, the catalyst regeneration operation can be terminated.
  • the control unit 700 exceeds the set value detected by the carbon monoxide sensor 610. Afterwards, when the detection value detected by the carbon monoxide sensor 610 becomes lower than the set value, the catalyst regeneration operation may be terminated.
  • the second opening / closing member 320 passes through the reactor 200. It may be the case that snow phenomena occurs in which some of the exhaust gas passing through the reactor 200 is discharged through the main flow path 100 because the exhaust gas may not be blocked.
  • control unit 700 as shown in FIG.
  • the catalyst regeneration operation F can be terminated when the detected value of the P is lower than the set value.
  • control unit 700 is the case that the first opening and closing member 310 or the second opening and closing member 320 does not block the flow of the exhaust gas flowing into the reactor 200 and the exhaust gas flowing into the reactor 200 Depending on the case of reliably blocking the flow, it is possible to effectively perform the catalyst regeneration operation by varying the criteria for terminating the catalyst regeneration operation.
  • the previous operation of comparing the measured value of the carbon monoxide concentration with the set carbon monoxide concentration set value (S41) is performed in the same manner as the selective catalytic reduction system operating process according to the first embodiment.
  • the carbon monoxide concentration contained in the exhaust gas passing through the catalyst by the carbon monoxide sensor is remeasured (S42).
  • the carbon monoxide concentration included in the exhaust gas passing through the catalyst by the carbon monoxide sensor is remeasured (S42).
  • the temperature of the exhaust gas heated by the heating unit is detected by a temperature sensor and the detected exhaust gas temperature is compared with the set temperature value ( S45).
  • the temperature of the exhaust gas heated by the heating unit is detected by a temperature sensor, and the operation process after comparing the detected exhaust gas temperature with a set temperature value (S45) is the same as the operation of the selective catalytic reduction system according to the first embodiment. It works.
  • Such an operation process can flexibly cope with a change in the carbon monoxide concentration value caused by an error according to the quality of the first opening and closing member of the selective reduction catalyst system. That is, when the operator manufactures the selective reduction catalyst system, the operation process of the controller can be set differently according to the quality of the first opening member and the second opening member, so that the controller can be used regardless of the quality of the first opening member and the second opening member.
  • the end point of the catalyst regeneration operation can be determined from the carbon monoxide concentration.
  • catalyst 310 first opening and closing member
  • blower 610 carbon monoxide sensor

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Analytical Chemistry (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

A selective catalyst reduction system according to an embodiment of the present invention comprises: a main fluid channel through which exhaust gas passes; a reactor disposed on the main fluid channel and having a catalyst placed therein; a first opening/closing member placed on the main fluid channel to switch a flow of the exhaust gas introduced into the reactor; a second opening/closing member placed on the main fluid channel to switch a flow of the exhaust gas having passed through the reactor; a circulation fluid channel for connecting one point between the first opening/closing member and the front end of the reactor and another point between the second opening/closing member and the rear end of the reactor; a blower for circulating the exhaust gas between the reactor and the circulation fluid channel; a carbon monoxide sensor for detecting the concentration of carbon monoxide included in the exhaust gas having passed through the catalyst; and a controller for controlling the first and second opening/closing members and the blower for regeneration of the catalyst to perform a catalyst regeneration operation.

Description

선택적 촉매 환원 시스템Selective catalytic reduction system

본 발명은 실시예는 선택적 촉매 환원 시스템에 관한 것으로, 더욱 상세하게는 반응기 내부에 설치된 촉매를 효과적으로 재생할 수 있는 선택적 촉매 환원 시스템에 관한 것이다.The present invention relates to a selective catalytic reduction system, and more particularly, to a selective catalytic reduction system capable of effectively regenerating a catalyst installed inside a reactor.

일반적으로 선택적 촉매 환원 시스템에 있어서 촉매는 배기가스의 정화 효율에 중요한 요소로 작용한다. 즉, 촉매의 유로에 배기가스에 포함된 그을음(soot) 또는 이물질 등이 쌓여 유로를 막는 것과 같은 피독현상이 발생하면 배기가스가 촉매를 통과하며 접촉되는 면적이 줄어들어 배기가스의 정화 효율이 저감된다.In general, in selective catalytic reduction systems, catalysts play an important role in the purification efficiency of exhaust gases. That is, if poisoning such as soot or foreign matter contained in the exhaust gas accumulates in the flow passage of the catalyst and blocks the flow passage, the area where the exhaust gas passes through the catalyst is reduced, thereby reducing the purification efficiency of the exhaust gas. .

따라서, 피독된 촉매를 재생하기 위해 반응기에 설치된 촉매를 가열하는 방식의 촉매재생 방법이 이용된다.Therefore, a catalyst regeneration method of heating the catalyst installed in the reactor to regenerate the poisoned catalyst is used.

하지만, 이러한 촉매재생 방법의 경우 선박 또는 플랜트와 같은 대형 설비에 이용되는 촉매를 재생하기 위해 용이하지 않다. However, such a catalyst regeneration method is not easy for regenerating catalysts used in large facilities such as ships or plants.

또한, 이러한 촉매재생 방법의 경우 일정시간 후 촉매 가열을 종료함으로 촉매의 피독 정도 및 촉매재생 과정중의 촉매재생 정도에 따라 촉매재생의 종료를 유연하게 판단하기 어려운 문제점이 있다.In addition, in the case of the catalyst regeneration method, it is difficult to flexibly determine the termination of the catalyst regeneration according to the degree of poisoning of the catalyst and the degree of catalyst regeneration during the catalyst regeneration process.

본 발명의 실시예는 반응기 내부에 위치하는 촉매를 효과적으로 재생 가능한 선택적 촉매 환원 시스템을 제공한다.Embodiments of the present invention provide a selective catalytic reduction system capable of effectively regenerating a catalyst located inside a reactor.

본 발명의 실시예에 따르면, 선택적 촉매 환원 시스템은 배기가스가 통과하는 메인 유로와, 상기 메인 유로 상에 배치되며 내부에 촉매가 설치된 반응기와, 상기 메인 유로 상에 설치되어 상기 반응기로 유입되는 배기가스의 흐름을 절환하는 제1 개폐부재와, 상기 메인 유로 상에 설치되어 상기 반응기를 통과한 배기가스의 흐름을 절환하는 제2 개폐부재와, 상기 제1 개폐부재와 상기 반응기 전단 사이의 일 지점과 상기 제2 개폐부재와 상기 반응기 후단 사이의 타 지점을 연결하는 순환유로와, 상기 반응기와 상기 순환유로 사이에서 배기가스를 순환 시키는 블로워와, 상기 촉매를 통과한 배기가스에 포함된 일산화탄소 농도를 검출하는 일산화탄소 센서, 그리고 상기 촉매의 재생을 위해 상기 제1 개폐부재와 상기 제2 개폐부재 및 상기 블로워를 제어하여 촉매재생 동작을 수행하는 제어부를 포함하며 상기 제어부는 상기 촉매재생 동작 중에 상기 제1 개폐부재와 상기 제2 개폐부재를 닫고 상기 블로워를 작동시키며 상기 일산화탄소 센서에 의해 검출된 검출값이 기설정된 일산화탄소 농도 설정값을 초과할 때 상기 촉매재생 동작을 종료한다.According to an exemplary embodiment of the present invention, the selective catalytic reduction system includes a main flow path through which exhaust gas passes, a reactor disposed on the main flow path and a catalyst installed therein, and an exhaust gas installed on the main flow path and introduced into the reactor. A first opening / closing member for switching gas flow, a second opening / closing member installed on the main flow path to switch the flow of exhaust gas passing through the reactor, and a point between the first opening / closing member and the front end of the reactor And a circulation passage connecting another point between the second opening and closing member and the reactor rear end, a blower for circulating the exhaust gas between the reactor and the circulation passage, and the concentration of carbon monoxide contained in the exhaust gas passing through the catalyst. A carbon monoxide sensor for detecting and controlling the first opening / closing member, the second opening / closing member, and the blower for regeneration of the catalyst And a control unit configured to perform a catalyst regeneration operation, wherein the control unit closes the first opening / closing member and the second opening / closing member during the catalyst regeneration operation, operates the blower, and the carbon monoxide whose preset detection value detected by the carbon monoxide sensor is preset. The catalyst regeneration operation is terminated when the concentration setting value is exceeded.

본 발명의 다른 실시예에 따르면, 배기가스가 통과하는 메인 유로와, 상기 메인 유로 상에 배치되며 내부에 촉매가 설치된 반응기와, 상기 메인 유로 상에 설치되어 상기 반응기로 유입되는 배기가스의 흐름을 절환하는 제1 개폐부재와, 상기 메인 유로 상에 설치되어 상기 반응기를 통과한 배기가스의 흐름을 절환하는 제2 개폐부재와, 상기 제1 개폐부재와 상기 반응기 전단 사이의 일 지점과 상기 제2 개폐부재와 상기 반응기 후단 사이의 타 지점을 연결하는 순환유로와, 상기 반응기와 상기 순환유로 사이에서 배기가스를 순환 시키는 블로워와, 상기 촉매를 통과한 배기가스에 포함된 일산화탄소 농도를 검출하는 일산화탄소 센서, 및 상기 촉매의 재생을 위해 상기 제1 개폐부재와 상기 제2 개폐부재 및 상기 블로워를 제어하여 촉매재생 동작을 수행하는 제어부를 포함하며 상기 제어부는 상기 촉매재생 동작 중에 상기 제1 개폐부재와 상기 제2 개폐부재를 닫고 상기 블로워를 작동시키며 상기 제어부는 상기 반응기와 상기 순환유로 사이를 순환하는 배기가스의 압력이 저하되는 경우, 상기 일산화탄소 센서에 의해 검출된 검출값이 기설정된 일산화탄소 농도 설정값을 초과하고, 상기 검출값이 상기 설정값 보다 낮아질 때 상기 촉매재생 동작을 종료한다.According to another embodiment of the present invention, a main flow path through which exhaust gas passes, a reactor disposed on the main flow path and a catalyst installed therein, and a flow of exhaust gas installed on the main flow path and introduced into the reactor A first opening / closing member for switching, a second opening / closing member installed on the main flow path to switch the flow of exhaust gas passing through the reactor, a point between the first opening / closing member and the front end of the reactor, and the second opening / closing member; Carbon monoxide sensor for detecting the carbon monoxide concentration in the exhaust gas passing through the catalyst, and a circulating flow path connecting the other point between the opening and closing member and the reactor rear end, a blower for circulating the exhaust gas between the reactor and the circulation flow path And controlling the first opening / closing member, the second opening / closing member, and the blower to regenerate the catalyst. Includes a control unit, the control unit closes the first opening and closing member and the second opening and closing member during the catalyst regeneration operation, and operates the blower, and the control unit reduces the pressure of the exhaust gas circulating between the reactor and the circulation passage. When the detection value detected by the carbon monoxide sensor exceeds the predetermined carbon monoxide concentration setting value, the catalyst regeneration operation is terminated when the detection value is lower than the setting value.

또한, 상기한 선택적 촉매 환원 시스템은 상기 촉매재생 동작 중에 순환되는 배기가스의 유량을 검출하는 유량센서를 더 포함 할 수 있으며, 상기 유량센서에서 검출된 유량이 기설정된 유량값 미만일 때 상기 블로워는 회전속도가 증가될 수 있다.In addition, the selective catalytic reduction system may further include a flow rate sensor for detecting the flow rate of the exhaust gas circulated during the catalyst regeneration operation, the blower is rotated when the flow rate detected by the flow rate sensor is less than a predetermined flow rate value Speed can be increased.

또한, 상기한 선택적 촉매 환원 시스템은 상기 순환유로를 통과하는 배기가스를 승온 시키는 가열부 및 상기 촉매재생 동작 중에 상기 반응기와 상기 순환유로 사이에서 순환되는 배기가스의 온도를 검출하는 온도센서를 더 포함할 수 있으며, 상기 온도센서에서 검출된 배기가스의 온도가 기설정된 배기가스 온도값 미만일 때 상기 가열부는 승온될 수 있다.In addition, the selective catalytic reduction system further comprises a heating unit for heating up the exhaust gas passing through the circulation passage and a temperature sensor for detecting the temperature of the exhaust gas circulated between the reactor and the circulation passage during the catalyst regeneration operation. The heating unit may be heated when the temperature of the exhaust gas detected by the temperature sensor is less than a predetermined exhaust gas temperature value.

본 발명의 실시예들에 따르면, 선택적 촉매 환원 시스템은 반응기 내부에 위치하는 촉매를 효과적으로 재생시킬 수 있다.According to embodiments of the present invention, the selective catalytic reduction system can effectively regenerate the catalyst located inside the reactor.

도 1은 본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템을 나타낸 도면이다.1 is a view showing a selective catalytic reduction system according to a first embodiment of the present invention.

도 2는 본 발명의 제1 실시예에 따른 반응기 내부의 시간에 따른 일산화탄소 농도를 나타내는 그래프이다.Figure 2 is a graph showing the carbon monoxide concentration with time inside the reactor according to a first embodiment of the present invention.

도 3은 본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템 동작과정의 제어 순서를 나타낸 순서도이다.3 is a flow chart showing a control sequence of the selective catalytic reduction system operation process according to the first embodiment of the present invention.

도 4는 본 발명의 제2 실시예에 따른 반응기 내부의 시간에 따른 일산화탄소 농도를 나타내는 그래프이다.4 is a graph showing carbon monoxide concentration over time in a reactor according to a second embodiment of the present invention.

도 5는 본 발명의 제2 실시예에 따른 선택적 촉매 환원 시스템 동작과정의 제어 순서를 나타낸 순서도이다.5 is a flowchart illustrating a control sequence of an operation of a selective catalytic reduction system according to a second embodiment of the present invention.

이하, 첨부한 도면을 참고로 하여 본 발명의 실시예에 대하여 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

또한, 여러 실시예들에 있어서, 동일한 구성을 가지는 구성요소에 대해서는 동일한 부호를 사용하여 대표적으로 제1 실시예에서 설명하고, 그 외의 제2 실시예에서는 제1 실시예와 다른 구성에 대해서만 설명하기로 한다.In addition, in various embodiments, components having the same configuration will be described in the first embodiment by using the same reference numerals, and in the second embodiment, only the configuration different from the first embodiment will be described. Shall be.

도면들은 개략적이고 축적에 맞게 도시되지 않았다는 것을 일러둔다. 도면에 있는 부분들의 상대적인 치수 및 비율은 도면에서의 명확성 및 편의를 위해 그 크기에 있어 과장되거나 감소되어 도시되었으며 임의의 치수는 단지 예시적인 것이지 한정적인 것은 아니다. 그리고 둘 이상의 도면에 나타나는 동일한 구조물 요소 또는 부품에는 동일한 참조 부호가 유사한 특징을 나타내기 위해 사용된다.It is noted that the figures are schematic and not drawn to scale. The relative dimensions and ratios of the parts in the figures have been exaggerated or reduced in size for clarity and convenience in the figures and any dimensions are merely exemplary and not limiting. And the same reference numerals are used to represent similar features in the same structural element or part shown in more than one figure.

본 발명의 실시예는 본 발명의 이상적인 실시예를 구체적으로 나타낸다. 그 결과, 도해의 다양한 변형이 예상된다. 따라서 실시예는 도시한 영역의 특정 형태에 국한되지 않으며, 예를 들면 제조에 의한 형태의 변형도 포함한다.Embodiments of the invention specifically illustrate ideal embodiments of the invention. As a result, various modifications of the drawings are expected. Thus, the embodiment is not limited to the specific form of the illustrated region, but includes, for example, modification of the form by manufacture.

이하, 도 1를 참조하여 본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템(101)을 설명한다.Hereinafter, the selective catalytic reduction system 101 according to the first embodiment of the present invention will be described with reference to FIG. 1.

본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템(101)은, 도 1에 도시한 바와 같이, 배기가스가 통과하는 메인 유로(100)와, 내부에 촉매(210)가 설치된 반응기(200)와, 제1 개폐부재(310)와, 제2 개폐부재(320)와, 순환유로(400)와, 블로워(500)와, 일산화탄소 센서(610), 그리고 제어부(700)를 포함한다.As shown in FIG. 1, the selective catalytic reduction system 101 according to the first embodiment of the present invention includes a main flow path 100 through which exhaust gas passes, and a reactor 200 in which a catalyst 210 is installed. And a first opening / closing member 310, a second opening / closing member 320, a circulation passage 400, a blower 500, a carbon monoxide sensor 610, and a controller 700.

메인 유로(100)는 디젤엔진과 같은 내연기관에서 발생하는 배기가스가 통과한다. 또한, 메인 유로(100)는 반응기(200)로 배기가스가 유입될 수 있도록 안내하고 반응기(200)를 통과하여 정화된 배기가스가 외부로 배출될 수 있도록 안내한다.The main flow path 100 passes exhaust gas generated from an internal combustion engine such as a diesel engine. In addition, the main flow path 100 guides the exhaust gas to the reactor 200 and guides the purified exhaust gas to the outside through the reactor 200.

반응기(200)는 메인 유로(100)와 연결되며 메인 유로(100)를 통과하는 배기가스가 반응기(200) 내부로 유입된다. The reactor 200 is connected to the main flow path 100, and exhaust gas flowing through the main flow path 100 is introduced into the reactor 200.

반응기(200) 내부에 설치된 촉매(210)는 반응기 내부를 통과하는 배기가스와 접촉되며 배기가스에 포함된 질소산화물(이하: NOx이라 한다)을 질소(N₂)와 수증기(H₂O)로 환원시켜 배기가스를 정화시킨다. The catalyst 210 installed in the reactor 200 is in contact with the exhaust gas passing through the reactor and exhausts nitrogen oxide (hereinafter referred to as NOx) included in the exhaust gas to nitrogen (N₂) and water vapor (H₂O). Purify the gas.

구체적으로, 촉매(210)는 반응기(200) 내부에 복수로 형성될 수 있다. 또한, 본 발명의 일 실시예에 따른 선택적 촉매 환원 시스템(101)에서 사용되는 촉매(210)는 배기가스에 포함된 NOx를 제거하는데 도움을 주는 선택적 환원 촉매일 수 있다.Specifically, the catalyst 210 may be formed in plural in the reactor 200. In addition, the catalyst 210 used in the selective catalytic reduction system 101 according to an embodiment of the present invention may be a selective reduction catalyst that helps to remove NOx contained in the exhaust gas.

제1 개폐부재(310)는 메인 유로(100) 상에 설치되며 반응기(200)로 유입되는 배기가스의 흐름을 절환한다. 즉, 제1 개폐부재(310)는 반응기(200)로 유입되는 배기가스의 흐름을 절환하기 위해 반응기(200) 전단의 메인 유로(100) 상에 설치될 수 있다. The first opening / closing member 310 is installed on the main flow path 100 and switches the flow of exhaust gas flowing into the reactor 200. That is, the first opening / closing member 310 may be installed on the main flow path 100 in front of the reactor 200 to switch the flow of the exhaust gas flowing into the reactor 200.

제2 개폐부재(320)는 메인 유로(100) 상에 설치되며 반응기(200)를 통과한 배기가스의 흐름을 절환한다. 즉, 제2 개폐부재(320)는 반응기(200)를 통과한 배기가스의 흐름을 절환하기 위해 반응기(200) 후단의 메인 유로(100) 상에 설치될 수 있다.The second opening / closing member 320 is installed on the main flow path 100 and switches the flow of the exhaust gas passing through the reactor 200. That is, the second opening / closing member 320 may be installed on the main flow path 100 at the rear end of the reactor 200 in order to switch the flow of the exhaust gas passing through the reactor 200.

또한, 제1 개폐부재(310) 및 제2 개폐부재(320)는 댐퍼 또는 밸브와 같이 유로를 통과하는 배기가스의 흐름을 절환할 수 있는 다양한 형태의 구조를 가질 수 있다.In addition, the first opening / closing member 310 and the second opening / closing member 320 may have various types of structures capable of switching the flow of exhaust gas passing through the flow path, such as a damper or a valve.

순환유로(400)는 제1 개폐부재(310)에 의해 반응기(200)로 배기가스의 유입이 제한되고, 제2 개폐부재(320)에 의해 반응기(200)를 통과한 배기가스가 외부로 배출되는 것이 제한될 때 배기가스의 순환을 안내한다.The circulation passage 400 is limited to the inflow of the exhaust gas to the reactor 200 by the first opening and closing member 310, the exhaust gas passing through the reactor 200 by the second opening and closing member 320 is discharged to the outside. It guides the circulation of exhaust gas when it is limited.

구체적으로, 순환유로(400)는 일단이 제1 개폐부재(310)와 반응기(200) 전단 사이의 일 지점과 연결되고, 타단이 제2 개폐부재(320)와 반응기(200) 후단 사이의 타지점과 연결되어 배기가스의 순환을 안내한다. 또한, 순환유로(400)의 타단은, 도 1에 도시한 바와 같이, 반응기(200)의 후단에 연결될 수 있으며 반응기(200)의 후단과 인접한 순환유로(400)의 일부가 반응기(200)와 인접하게 배치될 수 있다.Specifically, one end of the circulation passage 400 is connected to one point between the first opening and closing member 310 and the front end of the reactor 200, and the other end is the other end between the second opening and closing member 320 and the rear end of the reactor 200. It is connected to the point to guide the circulation of exhaust gas. In addition, the other end of the circulation passage 400 may be connected to the rear end of the reactor 200, and a portion of the circulation passage 400 adjacent to the rear end of the reactor 200 may be connected to the reactor 200. May be arranged adjacently.

블로워(500)는 반응기(200)와 순환유로(400) 사이의 배기가스를 순환시킨다. 구체적으로, 블로워(500)는 순환유로(400)의 일측에 배치되며 순환유로(400)를 통과하는 배기가스가 반응기(200)와 순환유로(400) 사이를 순환할 수 있도록 배기가스의 유속을 상승시킬 수 있다.The blower 500 circulates the exhaust gas between the reactor 200 and the circulation passage 400. Specifically, the blower 500 is disposed on one side of the circulation passage 400 and measures the flow rate of the exhaust gas so that the exhaust gas passing through the circulation passage 400 circulates between the reactor 200 and the circulation passage 400. Can be raised.

또한, 블로워(500)는 회전방향에 따라 반응기(200)와 순환유로(400) 사이를 순환하는 배기가스의 순환 흐름을 변경시킬 수 있다.In addition, the blower 500 may change the circulation flow of the exhaust gas circulating between the reactor 200 and the circulation passage 400 according to the rotation direction.

일산화탄소 센서(610)는 반응기(200) 내부에 위치하는 촉매(210)를 통과한 정화된 배기가스에 포함된 일산화탄소 농도를 검출한다. 구체적으로, 일산화탄소 센서(610)는 반응기(200)의 후단에 설치되어 촉매(210)를 통과한 정화된 배기가스에 포함된 일산화탄소 농도를 검출할 수 있다.The carbon monoxide sensor 610 detects the concentration of carbon monoxide contained in the purified exhaust gas passing through the catalyst 210 located in the reactor 200. Specifically, the carbon monoxide sensor 610 may be installed at the rear end of the reactor 200 to detect the carbon monoxide concentration contained in the purified exhaust gas passing through the catalyst 210.

또한, 일산화탄소 센서(610)는 촉매(210)를 통과한 정화된 배기가스에 포함된 일산화탄소 농도를 검출할 수 있도록 순환유로(400)의 일측에 설치될 수 있다.In addition, the carbon monoxide sensor 610 may be installed on one side of the circulation passage 400 to detect the carbon monoxide concentration contained in the purified exhaust gas passing through the catalyst 210.

제어부(700)는 제1 개폐부재(310)와 제2 개폐부재(320) 및 블로워(500)를 제어한다. 또한, 제어부(700)는 촉매(210)의 재생을 위해 촉매재생 동작을 수행할 때 제1 개폐부재(310)를 닫아 내연기관에서 발생되는 배기가스가 반응기(200)로 유입되는 것을 제한하며 제2 개폐부재(320)를 닫아 반응기(200)의 촉매(210)를 통과한 정화된 배기가스가 외부로 배출되는 것을 제한하고 블로워(500)를 작동시켜 순환유로(400)와 반응기(200) 사이의 배기가스가 순환될 수 있도록 한다.The controller 700 controls the first opening / closing member 310, the second opening / closing member 320, and the blower 500. In addition, the controller 700 closes the first opening / closing member 310 when performing the catalyst regeneration operation for regeneration of the catalyst 210 to restrict the inflow of exhaust gas generated from the internal combustion engine into the reactor 200. 2 to close the opening and closing member 320 to limit the discharge of the purified exhaust gas passing through the catalyst 210 of the reactor 200 to the outside and to operate the blower 500 between the circulating flow path 400 and the reactor 200 Allow exhaust gas to circulate.

또한, 선택적 환원 촉매 시스템(101)은 서브 유로(110)를 더 포함할 수 있다.In addition, the selective reduction catalyst system 101 may further include a sub flow path (110).

구체적으로, 서브 유로(110)는 일단이 제1 개폐부재(310) 전단에 연결될 수 있다. 또한, 제어부(700)가 촉매재생 동작을 수행하는 동안 내연기관에서 발생되는 배기가스는 서브 유로(110)를 통해 외부로 배출될 수 있다. 따라서, 제1 개폐부재(310)가 닫히는 촉매재생 동작을 제어부(700)가 수행하는 동안 제1 개폐부재(310)에 의해 반응기(200)로 유입이 제한된 배기가스배기가 서브 유로(110)를 통과하여 외부로 배출될 수 있도록 안내한다. Specifically, one end of the sub flow path 110 may be connected to the front end of the first opening and closing member 310. In addition, the exhaust gas generated in the internal combustion engine while the controller 700 performs the catalyst regeneration operation may be discharged to the outside through the sub-channel 110. Therefore, while the control unit 700 performs the catalyst regeneration operation in which the first opening / closing member 310 is closed, the exhaust gas exhaust gas having limited inflow into the reactor 200 by the first opening / closing member 310 opens the sub-channel 110. Guide them through and out to the outside.

따라서, 선택적 환원 촉매 시스템(101)을 구비한 선박 또는 플랜트와 같은 대형 설비가 동작 중에 발생하는 배기가스는 서브 유로(110)를 통해 외부로 배출된다. 즉, 설비 동작 중에도 제어부(700)는 촉매재생 동작을 수행할 수 있다.Therefore, the exhaust gas generated during the operation of a large facility such as a ship or a plant equipped with the selective reduction catalyst system 101 is discharged to the outside through the sub-channel 110. That is, the controller 700 may perform the catalyst regeneration operation even during the operation of the facility.

그리고, 제어부(700)는 촉매재생 동작이 종료된 후 제1 개폐부재(310)와 제2 개폐부재(320)를 개방하고 블로워(500)의 작동이 정지되도록 하는 배기가스 정화 동작을 수행할 수 있다.The controller 700 may perform an exhaust gas purification operation of opening the first opening / closing member 310 and the second opening / closing member 320 and stopping the operation of the blower 500 after the catalyst regeneration operation is completed. have.

촉매재생 동작의 시작은 반응기(200) 전후단에 설치되는 NOx 센서에 의해 배기가스에 포함된 NOx가 반응기 전단에서 측정된 값과 배기가스가 촉매를 통과한 후인 반응기 후단에서 측정된 값을 비교하여 선택적 촉매 환원 시스템의 배기가스 정화 효율을 판단하여 일정값 이하일 때 반응기(200) 내부에 위치하는 촉매(210)가 피독 되었다고 판단한다. 따라서, 촉매(210)가 피독 되었다고 판단된 경우 제어부(700)는 촉매재생 동작을 수행한다.The start of the catalyst regeneration operation is performed by comparing the value measured at the front end of the reactor with the NOx contained in the exhaust gas by the NOx sensor installed at the front and rear of the reactor 200 and after the exhaust gas has passed the catalyst. The exhaust gas purifying efficiency of the selective catalytic reduction system is determined to determine that the catalyst 210 located inside the reactor 200 is poisoned when it is below a predetermined value. Therefore, when it is determined that the catalyst 210 is poisoned, the controller 700 performs a catalyst regeneration operation.

본 발명의 제1 실시예에 따른 촉매의 피독 판정은 NOx 센서에 의해 검출되는 선택적 촉매 환원 시스템의 배기가스 정화 효율로부터 판정되는 것에 한정 되는 것은 아니며 해당 기술 분야의 종사자에게 공지된 다양한 방법으로 촉매의 피독 판정이 이루어 질 수 있다.The poisoning determination of the catalyst according to the first embodiment of the present invention is not limited to that determined from the exhaust gas purification efficiency of the selective catalytic reduction system detected by the NOx sensor, and is determined by various methods known to those skilled in the art. A poisoning decision can be made.

구체적으로, 설정된 일산화탄소 농도의 설정값은 선택적 촉매 환원 시스템(101)을 위해 기설정된 이산화탄소 농도의 설정값이며 이러한 정보는 내연기관의 운행에 따른 부하정보 또는 배기가스의 유량, 온도, 압력과 같은 다양한 정보를 맵핑(mapping)하여 제어부(700)에 저장된 정보이다. 또한, 이러한 정보는 실험데이터를 기반으로 맵핑되어 제어부(700)에 저장될 수 있다.Specifically, the set value of the carbon monoxide concentration is a predetermined value of the carbon dioxide concentration set for the selective catalytic reduction system 101 and the information is various, such as the load information according to the operation of the internal combustion engine or the flow rate, temperature, pressure of the exhaust gas. The information is stored in the controller 700 by mapping the information. In addition, the information may be mapped based on the experimental data and stored in the controller 700.

또한, 본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템(101)은 유량센서(630)를 더 포함할 수 있다.In addition, the selective catalytic reduction system 101 according to the first embodiment of the present invention may further include a flow sensor (630).

유량센서(630)는 촉매재생 동작 중에 순환되는 배기가스의 유량을 검출할 수 있다. 또한, 유량센서(630)는 블로워(500)를 통과한 순환되는 배기가스의 유량을 검출할 수 있다.The flow rate sensor 630 may detect the flow rate of the exhaust gas circulated during the catalyst regeneration operation. In addition, the flow sensor 630 may detect the flow rate of the exhaust gas circulated through the blower 500.

구체적으로, 유량센서(630)는 순환유로(400)의 일측에 설치되어 순환되는 배기가스의 유량을 검출할 수 있다.Specifically, the flow rate sensor 630 may be installed at one side of the circulation passage 400 to detect the flow rate of the exhaust gas circulated.

제어부(700)의 촉매재생 동작 중에 유량센서(630)에 의해 검출된 유량이 설정된 유량값 미만일 때 블로워(500)는 회전속도가 증가되도록 제어될 수 있다. When the flow rate detected by the flow sensor 630 during the catalyst regeneration operation of the controller 700 is less than the set flow rate value, the blower 500 may be controlled to increase the rotation speed.

즉, 촉매재생 동작 중에 블로워(500)는 제어부(700)에 의해 순환되는 배기가스의 유속을 증가시킬 수 있도록 회전속가 증가되도록 제어되며 유량센서(630)에 의해 검출된 유량이 설정된 유량값 이상이면 촉매재생 동작이 완료될 때까지 일정한 회전속도를 유지할 수 있다.That is, during the catalyst regeneration operation, the blower 500 is controlled to increase the rotation speed so as to increase the flow velocity of the exhaust gas circulated by the controller 700, and when the flow rate detected by the flow sensor 630 is equal to or greater than the set flow rate value. Constant rotational speed can be maintained until the catalyst regeneration operation is completed.

또한, 본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템(101)은 가열부(800) 및 온도센서(620)를 더 포함할 수 있다.In addition, the selective catalytic reduction system 101 according to the first embodiment of the present invention may further include a heating unit 800 and a temperature sensor 620.

가열부(800)는 순환유로(400)를 통과하는 배기가스를 승온 시킬 수 있다. 또한, 가열부(800)는 제어부(700)에 의해 제어된다. 그리고, 제어부(700)가 촉매(210)의 재생을 위해 제1 개폐부재(310)와, 제2 개폐부재(320), 및 블로워(500)를 제어하는 촉매재생 동작을 수행할 때 가열부(800)도 함께 제어한다.The heating unit 800 may heat up the exhaust gas passing through the circulation passage 400. In addition, the heating unit 800 is controlled by the control unit 700. And, when the control unit 700 performs the catalyst regeneration operation for controlling the first opening and closing member 310, the second opening and closing member 320, and the blower 500 for the regeneration of the catalyst 210 (heating unit ( 800 also controlled.

가열부(800)는 공급된 연료를 점화시켜 순환유로(400)를 통과하는 배기가스를 승온시키는 버너일 수 있다. 또한, 가열부(800)가 버너인 경우 가열부(800)에 공급되는 연료량을 증가시켜 가열부(800)에서 발생되는 화염의 온도를 상승시켜 배기가스의 온도가 승온 되도록 할 수 있다.The heating unit 800 may be a burner that ignites the supplied fuel to heat up the exhaust gas passing through the circulation passage 400. In addition, when the heating unit 800 is a burner, the amount of fuel supplied to the heating unit 800 may be increased to increase the temperature of the flame generated by the heating unit 800 so that the temperature of the exhaust gas may be increased.

본 발명의 제1 실시예에 따른 가열부(800)는 버너에 한정 되는 것은 아니며 해당 기술 분야의 종사자에게 공지된 배기가스를 가열할 수 있는 다양한 구조로 변경 실시될 수 있다.The heating unit 800 according to the first embodiment of the present invention is not limited to the burner, and may be changed to various structures capable of heating the exhaust gas known to those skilled in the art.

온도센서(620)는 가열부(800)를 통과하여 승온된 배기가스의 온도를 검출할 수 있다. 또한, 온도센서(620)는 순환유로(400)의 일측에 설치되며 가열부(800)를 통과한 배기가스의 온도를 검출할 수 있도록 가열부(800) 후단에 배치될 수 있다.The temperature sensor 620 may detect the temperature of the exhaust gas heated up through the heating unit 800. In addition, the temperature sensor 620 may be installed at one side of the circulation passage 400 and may be disposed at the rear end of the heating unit 800 to detect the temperature of the exhaust gas passing through the heating unit 800.

구체적으로, 제어부(700)에 의해 촉매재생 동작을 수행하는 중에 가열부(800)는 순환유로(400)를 통과하는 배기가스를 승온 시키며 승온된 배기가스가 블로워(500)에 의해 순환되어 반응기(200)로 유입되어 반응기(200) 내부에 위치한 촉매(210)를 승온시켜 촉매(210)에 흡착된 그을음(soot) 또는 이물질들을 제거할 수 있다.Specifically, during the catalyst regeneration operation by the control unit 700, the heating unit 800 heats up the exhaust gas passing through the circulation passage 400, and the heated exhaust gas is circulated by the blower 500 and the reactor ( 200 may be heated to raise the catalyst 210 located in the reactor 200 to remove soot or foreign matter adsorbed on the catalyst 210.

제어부(700)의 촉매재생 동작 중에 온도센서(620)에서 검출된 배기가스의 온도가 설정된 배기가스의 온도값 미만일 때 가열부(800)를 승온되도록 제어되어 배기가스의 온도를 상승시켜 반응기(200)에 공급할 수 있어 제어부(700)가 효과적으로 촉매재생 동작을 수행할 수 있다. When the temperature of the exhaust gas detected by the temperature sensor 620 is less than the set exhaust gas temperature value during the catalyst regeneration operation of the control unit 700, the heating unit 800 is controlled to increase in temperature to increase the temperature of the exhaust gas in the reactor 200. ), The control unit 700 can effectively perform the catalyst regeneration operation.

즉, 촉매재생 동작 중에 가열부(800)는 제어부(700)에 의해 순환되는 배기가스의 온도를 승온시킬 수 있도록 제어되며 온도센서(620)에 의해 검출된 온도가 설정된 온도값 이상이면 촉매재생 동작이 완료될 때까지 일정한 온도를 유지할 수 있다.That is, the heating unit 800 is controlled to increase the temperature of the exhaust gas circulated by the control unit 700 during the catalyst regeneration operation, and the catalyst regeneration operation when the temperature detected by the temperature sensor 620 is equal to or higher than the set temperature value. The temperature can be kept constant until this is completed.

또한, 본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템(101)의 제어부(700)는 가열부(800)에 의해 승온된 배기가스의 온도가 일정한 온도를 유지한 시간을 측정하여 촉매재생 동작을 완료할 수 있다.In addition, the control unit 700 of the selective catalytic reduction system 101 according to the first embodiment of the present invention measures the time during which the temperature of the exhaust gas heated by the heating unit 800 maintains a constant temperature, thereby regenerating the catalyst. You can complete

즉, 제어부(700)는 유량센서(630)에 의해 블로워(500)의 회전속도를 제어하고, 온도센서(620)에 의해 가열부(800)의 온도를 제어하며, 일산화탄소 센서(610)에 촉매재생 동작 종료를 제어 할 수 있다. That is, the control unit 700 controls the rotation speed of the blower 500 by the flow sensor 630, the temperature of the heating unit 800 by the temperature sensor 620, the catalyst to the carbon monoxide sensor 610 You can control the end of playback operation.

또한, 제어부(700)는 일산화탄소 농도의 검출값과 설정값을 비교하는 동안 가열부(800)가 계속 승온 되도록 할 수 있다.In addition, the control unit 700 may allow the heating unit 800 to be continuously heated while comparing the detected value of the carbon monoxide concentration and the set value.

이와 같은 구성에 의하여, 본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템(101)은 반응기 내부에 설치된 촉매(210)를 효과적으로 재생 시킬 수 있다.By such a configuration, the selective catalytic reduction system 101 according to the first embodiment of the present invention can effectively regenerate the catalyst 210 installed inside the reactor.

가열부(800)가 순환유로(400)를 통과하는 순환하는 배기가스를 승온시키고 이렇게 승온된 배기가스가 반응기(200)로 유입되어 촉매(210)를 가열시켜 재생할 수 있어 선박 또는 플랜트 설비에 사용되는 대형화된 선택적 촉매 환원 시스템에 구비된 촉매도 효과적으로 재생할 수 있다.The heating unit 800 heats up the circulating exhaust gas passing through the circulation passage 400 and the heated exhaust gas is introduced into the reactor 200 to heat and regenerate the catalyst 210 to be used in a ship or a plant facility. The catalyst provided in the enlarged selective catalytic reduction system can be effectively regenerated.

또한, 가열부(800)가 순환하는 배기가스를 가열함으로 승온된 배기가스의 열손실을 줄일 수 있어 효과적으로 촉매(210)를 재생시킬 수 있다.In addition, by heating the exhaust gas circulated by the heating unit 800, it is possible to reduce the heat loss of the heated exhaust gas, thereby effectively regenerating the catalyst 210.

또한, 제어부(700)가 촉매의 피독 정도 또는 촉매재생 동작 진행상황을 유량센서(630) 및 온도센서(620)로부터 검출된 값을 기초로 촉매재생 동작 종료 시점을 판단할 수 있어 유연하게 촉매재생 동작을 종료할 수 있다.In addition, the controller 700 can flexibly regenerate the catalyst regeneration operation by determining the poisoning degree of the catalyst or the progress of the catalyst regeneration operation based on the values detected from the flow rate sensor 630 and the temperature sensor 620. The operation can be terminated.

이하, 본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템(101)의 제어부(700)에 관해 설명한다.Hereinafter, the control unit 700 of the selective catalytic reduction system 101 according to the first embodiment of the present invention will be described.

본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템(101)의 제어부(700)는 제1 개폐부재(310)와 제2 개폐부재(320)가 촉매재생 동작 중에 반응기(200)로 유입되는 배기가스의 흐름을 차단시키고 반응기(200)를 통과한 배기가스 메인 유로(100)를 통해 외부로 배출되는 것을 차단시켜 반응기(200)와 순환유로(400) 사이를 순환하는 배기가스의 압력을 일정하게 유지하거나 순환하는 배기가스의 압력이 상승되는 경우 일산화탄소 센서(610)에 의해 검출된 정화된 배기가스에 포함된 일산화탄소 농도의 검출값이 설정된 일산화탄소 농도의 설정값을 초과할 때 촉매재생 동작을 종료시킨다. The control unit 700 of the selective catalytic reduction system 101 according to the first embodiment of the present invention exhausts the first opening and closing member 310 and the second opening and closing member 320 into the reactor 200 during the catalyst regeneration operation. By blocking the flow of gas and blocking the discharge of the gas to the outside through the exhaust gas main flow path 100 passing through the reactor 200, the pressure of the exhaust gas circulating between the reactor 200 and the circulation flow path 400 is constant. The catalyst regeneration operation is terminated when the detected value of the carbon monoxide concentration contained in the purified exhaust gas detected by the carbon monoxide sensor 610 exceeds the set value of the set carbon monoxide concentration when the pressure of the held or circulated exhaust gas is increased. .

즉, 제어부(700)는 일산화탄소 센서(610)에서 검출된 검출값이 설정값을 초과하면 촉매재생 동작을 종료시킨 후 배기가스 정화 동작을 수행할 수 있다.That is, when the detected value detected by the carbon monoxide sensor 610 exceeds the set value, the controller 700 may terminate the catalyst regeneration operation and then perform the exhaust gas purification operation.

제어부(700)는, 도 2에 도시한 바와 같이, 일산화탄소 센서(610)에 의해 검출된 검출값이 설정값을 초과할 때 촉매재생 동작을 종료(F)할 수 있다.As illustrated in FIG. 2, the control unit 700 may terminate the catalyst regeneration operation when the detection value detected by the carbon monoxide sensor 610 exceeds a set value.

일예로, 본 발명의 제1 실시예에 따른 제어부(700)는 촉매재생 동작 중에 제1 개폐부재(310)에 의해 반응기(200)로 유입되는 배기가스 차단되고, 제2 개폐부재(320)에 의해 반응기(200)를 통과한 배기가스가 외부로 배출되는 것이 차단되어 반응기(200)와 순환유로(400) 사이의 배기가스 압력 저하가 없는 경우 일산화탄소 센서(610)에 의해 검출된 일산화탄소 농도의 검출값에 의해 촉매재생 동작을 선택적으로 종료할 수 있다.For example, the control unit 700 according to the first embodiment of the present invention is blocked by the exhaust gas flowing into the reactor 200 by the first opening and closing member 310 during the catalyst regeneration operation, the second opening and closing member 320 When the exhaust gas passing through the reactor 200 is prevented from being discharged to the outside so that there is no decrease in the exhaust gas pressure between the reactor 200 and the circulation passage 400, the detection of the carbon monoxide concentration detected by the carbon monoxide sensor 610 is detected. The value can selectively terminate the catalyst regeneration operation.

구체적으로, 촉매재생 동작 중 배기가스의 압력이 저하되는 경우와 배기가스의 압력이 저하되지 않는 경우는 선택적 촉매 환원 시스템(101)을 구비하며 설치되는 제1 개폐부재(310) 또는 제2 개폐부재(320)의 품질에 따라 작업자에 의해 미리 선택될 수 있다. 또한, 선택적 촉매 환원 시스템(101)이 별도의 압력센서(640)를 구비하여 촉매재생 동작 중 제어부(700)에 의해 순환되는 배기가스의 압력을 측정한 측정값과 설정된 압력값을 비교하여 순환되는 배기가스의 압력 저하여부를 판단하여 촉매재생 동작을 종료할 수 있다.Specifically, when the pressure of the exhaust gas decreases during the catalyst regeneration operation and when the pressure of the exhaust gas does not decrease, the first opening / closing member 310 or the second opening / closing member having the selective catalytic reduction system 101 is installed. According to the quality of the 320 may be selected in advance by the operator. In addition, the selective catalytic reduction system 101 includes a separate pressure sensor 640 is circulated by comparing the measured pressure and the set pressure value measured the pressure of the exhaust gas circulated by the control unit 700 during the catalyst regeneration operation The catalyst regeneration operation can be ended by determining whether the pressure of the exhaust gas is lowered.

이와 같은 구성에 의하여, 본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템(101)은 촉매를 효과적으로 재생할 수 있다.By such a configuration, the selective catalytic reduction system 101 according to the first embodiment of the present invention can effectively reproduce the catalyst.

제어부(700)는 촉매재생 동작 중에 제1 개폐부재(310)와 제2 개폐부재(320)를 닫아 반응기(200)로 유입되는 배기가스를 차단시키며 반응기(200)를 통과한 배기가스가 외부로 배출되는 것을 차단시키고, 반응기(200)와 순환유로(400) 사이의 배기가스를 블로워(500)로 순환시켜 촉매(210)에 공급할 수 있어 별도의 외기를 공급 받을 경우 배기가스의 온도 저하에 따라 촉매재생 효율이 낮아지는 것을 방지 할 수 있다.The controller 700 closes the first opening / closing member 310 and the second opening / closing member 320 to block the exhaust gas flowing into the reactor 200 during the catalyst regeneration operation, and exhaust gas passing through the reactor 200 is moved to the outside. Blocking the discharge, the exhaust gas between the reactor 200 and the circulating flow path 400 can be circulated to the blower 500 and supplied to the catalyst 210, so that when a separate outside air is supplied, the exhaust gas temperature decreases. It is possible to prevent the catalyst regeneration efficiency from lowering.

또한, 제어부(700)가 촉매(210)를 통과한 정화된 배기가스에 포함된 일산화탄소의 농도를 일산화탄소 센서(610)로부터 검출한 검출값을 기초로 하여 촉매재생 동작을 종료할 수 있어 촉매의 피독 상태에 따라 촉매재생 동작을 유연하게 조절할 수 있다.In addition, the controller 700 may terminate the catalyst regeneration operation based on the detection value of the carbon monoxide contained in the purified exhaust gas that has passed through the catalyst 210 from the carbon monoxide sensor 610 to poison the catalyst. Depending on the state, the catalyst regeneration operation can be flexibly adjusted.

이하, 도 3을 참조하여 본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템을 이용한 동작과정을 제어방법을 중심으로 설명한다.Hereinafter, an operation process using the selective catalytic reduction system according to the first embodiment of the present invention will be described with reference to FIG. 3.

본 발명의 제1 실시예에 따른 선택적 촉매 환원 시스템은 공지된 다양한 기술을 이용하여 촉매의 피독을 판단한 후 촉매가 피독 되었다고 판단한 경우 촉매의 재생을 위해 제어부는 촉매재생 동작을 시작한다.In the selective catalytic reduction system according to the first embodiment of the present invention, after determining the poisoning of the catalyst using various known techniques, the controller starts the catalyst regeneration operation to regenerate the catalyst when the catalyst is poisoned.

촉매재생 동작이 시작되면 제1 개폐부재 및 제2 개폐부재를 절환 시켜 반응기로 배기가스의 유입을 차단하고 반응기를 통과한 배기가스가 외부로 배출되는 것을 차단하여 반응기와 순환유로 사이에서 배기가스가 순환될 수 있도록 개폐부재를 닫는다(S10).When the catalyst regeneration operation is started, the first switching member and the second switching member are switched to block the inflow of the exhaust gas into the reactor, and the exhaust gas passing through the reactor is prevented from being discharged to the outside to exhaust the gas between the reactor and the circulation passage. Close the opening and closing member to be circulated (S10).

촉매의 피독 정도 또는 선택적 촉매 환원 시스템을 구비한 장치의 부하량에 따라 기설정된 블로워 유량값과, 가열부 온도값과, 일산화탄소 농도값, 및 재생동작 시간값을 결정(S20)한다.A predetermined blower flow rate value, a heating part temperature value, a carbon monoxide concentration value, and a regeneration operation time value are determined according to the degree of poisoning of the catalyst or the load of the apparatus equipped with the selective catalytic reduction system (S20).

촉매 재생을 위해 블로워를 작동(S30)시킨다. 그리고 현재 블로워에 의한 순환되는 배기가스의 유량과 설정된 블로워 유량값을 비교(S31)한다.The blower is operated (S30) for catalyst regeneration. Then, the flow rate of the exhaust gas circulated by the current blower and the set blower flow rate value are compared (S31).

현재 배기가스의 유량이 설정된 유량값 이하인 경우, 블로워의 속도가 증가되도록 동작(S30)시킨다.When the flow rate of the current exhaust gas is less than or equal to the set flow rate value, the speed of the blower is increased (S30).

현재 배기가스의 유량이 설정된 유량값을 초과하는 경우, 가열부를 작동(S40)시킨다. If the flow rate of the current exhaust gas exceeds the set flow rate value, the heating unit is operated (S40).

일산화탄소 센서에 의해 촉매를 통과한 배기가스에 포함된 일산화탄소 농도를 측정하여 일산화탄소 농도의 측정값과 설정된 일산화탄소 농도 설정값을 비교(S41)한다.By measuring the carbon monoxide concentration contained in the exhaust gas passing through the catalyst by the carbon monoxide sensor to compare the measured value of the carbon monoxide concentration and the set carbon monoxide concentration set value (S41).

측정된 일산화탄소 농도의 측정값이 일산화탄소 농도 설정값 이하인 경우, 계속 촉매를 통과한 순환되는 배기가스에 포함된 일산화탄소 농도를 측정한다.If the measured value of the carbon monoxide concentration is less than or equal to the carbon monoxide concentration setting value, the carbon monoxide concentration contained in the circulating exhaust gas that has passed through the catalyst is continuously measured.

측정된 일산화탄소 농도의 측정값이 일산화탄소 농도를 초과한 경우, 가열부에 의해 승온된 배기가스의 온도를 온도센서로 검출하며 검출된 배기가스 온도와 설정된 온도값을 비교(S45)한다.When the measured value of the carbon monoxide concentration exceeds the carbon monoxide concentration, the temperature of the exhaust gas heated by the heating unit is detected by a temperature sensor, and the detected exhaust gas temperature is compared with the set temperature value (S45).

검출된 배기가스 온도가 설정된 온도값 이하인 경우, 가열부는 배기가스를 승온시킬 수 있도록 동작(S40)된다.When the detected exhaust gas temperature is equal to or less than the set temperature value, the heating unit is operated to increase the exhaust gas temperature (S40).

검출된 배기가스 온도가 설정된 온도값을 초과하는 경우, 설정된 온도값 인상으로 배기가스가 순환되는 시간과 설정된 시간값을 비교(S50)한다.When the detected exhaust gas temperature exceeds the set temperature value, the time at which the exhaust gas is circulated with the set temperature value increase is compared with the set time value (S50).

설정된 온도값 이상인 배기가스의 순환시간이 설정된 시간값 미만인 경우, 배기가스의 순환시간이 설정 시간값을 초과할 때까지 시간이 증가되며 배기가스의 순환시간이 설정 시간값을 초과하도록 한다.When the circulation time of the exhaust gas that is greater than or equal to the set temperature value is less than the set time value, the time is increased until the circulation time of the exhaust gas exceeds the set time value and the circulation time of the exhaust gas exceeds the set time value.

설정된 온도값 이상인 배기가스의 순환시간이 설정된 시간값을 초과한 경우, 촉매재생 동작을 종료한다.If the circulation time of the exhaust gas that is equal to or greater than the set temperature value exceeds the set time value, the catalyst regeneration operation is terminated.

이때 촉매재생 동작이 종료되면, 제1 개폐부재 및 제2 개폐부재는 개방되며, 블로워 및 가열부의 작동은 종료된다.At this time, when the catalyst regeneration operation is finished, the first opening and closing member and the second opening and closing member is opened, the operation of the blower and the heating unit is terminated.

이와 같은 동작과정을 수행하면 효과적으로 촉매를 재생할 수 있다. 또한, 이러한 동작과정에 따라 제어부가 일산화탄소 센서와, 유량센서와, 온도센서, 및 순환시간에 의해 선택적 환원 시스템의 촉매재생 동작 종료 시점을 효과적으로 판단할 수 있다.Performing such an operation process can effectively regenerate the catalyst. In addition, according to the operation process, the control unit can effectively determine the end point of the catalytic regeneration operation of the selective reduction system by the carbon monoxide sensor, the flow sensor, the temperature sensor, and the circulation time.

이하, 본 발명의 제2 실시예에 따른 선택적 촉매 환원 시스템(101)의 제어부(700)에 관해 설명한다. 제2 실시예는 제어부(700)의 역할을 제외한 선택적 촉매 환원 시스템의 구성은 제1 실시예와 동일하다.Hereinafter, the control unit 700 of the selective catalytic reduction system 101 according to the second embodiment of the present invention will be described. In the second embodiment, the configuration of the selective catalytic reduction system except for the role of the control unit 700 is the same as that of the first embodiment.

제어부(700)는 반응기(200)와 순환유로(400) 일산화탄소 센서(610)에 의해 검출된 이산화탄소 농도 검출값이 설정값을 초과한 후 다시 일산화탄소 센서(610)에 의해 검출된 이산화탄소 농도 검출값이 설정값 보다 낮아질 때 촉매재생 동작을 종료할 수 있다.The control unit 700 detects that the carbon dioxide concentration detected by the carbon monoxide sensor 610 is again detected after the carbon dioxide concentration detected by the carbon monoxide sensor 610 of the reactor 200 and the circulation passage 400 exceeds a set value. When it is lower than the set value, the catalyst regeneration operation can be terminated.

즉, 촉매재생 동작 중에 제어부(700)는 반응기(200)와 순환유로(400) 사이를 순환하는 배기가스의 압력이 저하되는 경우 일산화탄소 센서(610)에 의해 검출된 검출값이 설정값을 초과한 후 다시 일산화탄소 센서(610)에 의해 검출된 검출값이 설정값 보다 낮아질 때 촉매재생 동작을 종료할 수 있다.That is, when the pressure of the exhaust gas circulating between the reactor 200 and the circulation passage 400 decreases during the catalyst regeneration operation, the control unit 700 exceeds the set value detected by the carbon monoxide sensor 610. Afterwards, when the detection value detected by the carbon monoxide sensor 610 becomes lower than the set value, the catalyst regeneration operation may be terminated.

일예로, 제어부(700)의 촉매재생 동작 중에 반응기(200)와 순환유로(400) 사이를 순환하는 배기가스의 압력이 저하되는 경우는 제2 개폐부재(320)가 반응기(200)를 통과한 배기가스의 흐름을 차단하지 못하여 반응기(200)를 통과한 일부의 배기가스가 메인 유로(100)를 통해 배출되는 설기현상이 발생하는 경우일 수 있다. For example, when the pressure of the exhaust gas circulating between the reactor 200 and the circulation passage 400 decreases during the catalyst regeneration operation of the controller 700, the second opening / closing member 320 passes through the reactor 200. It may be the case that snow phenomena occurs in which some of the exhaust gas passing through the reactor 200 is discharged through the main flow path 100 because the exhaust gas may not be blocked.

따라서, 이러한 경우 제어부(700)는, 도 4에 도시한 바와 같이, 일산화탄소 센서(610)에 의해 검출되는 일산화탄소 농도의 검출값이 설정값을 초과하고 다시 일산화탄소 센서(610)에 의해 검출되는 일산화탄소 농도의 검출값이 설정값 보다 낮아질 때 촉매재생 동작(F)을 종료할 수 있다.Therefore, in this case, the control unit 700, as shown in FIG. The catalyst regeneration operation F can be terminated when the detected value of the P is lower than the set value.

즉, 제어부(700)는 제1 개폐부재(310) 또는 제2 개폐부재(320)가 반응기(200)로 유출입되는 배기가스의 흐름을 차단하지 못하는 경우와 반응기(200)로 유출입되는 배기가스의 흐름을 확실하게 차단하는 경우에 따라 촉매재생 동작을 종료하는 기준을 달리하여 효과적으로 촉매재생 동작을 수행할 수 있다.That is, the control unit 700 is the case that the first opening and closing member 310 or the second opening and closing member 320 does not block the flow of the exhaust gas flowing into the reactor 200 and the exhaust gas flowing into the reactor 200 Depending on the case of reliably blocking the flow, it is possible to effectively perform the catalyst regeneration operation by varying the criteria for terminating the catalyst regeneration operation.

이하, 도 5를 참조하여 본 발명의 제2 실시예에 따른 선택적 촉매 환원 시스템을 이용한 동작과정을 제어방법을 중심으로 설명한다.Hereinafter, an operation process using the selective catalytic reduction system according to the second embodiment of the present invention will be described with reference to FIG. 5.

일산화탄소 농도의 측정값과 설정된 일산화탄소 농도 설정값을 비교(S41)하는 이전의 동작과정은 제1 실시예에 따른 선택적 촉매 환원 시스템 동작과정과 동일하게 동작된다.The previous operation of comparing the measured value of the carbon monoxide concentration with the set carbon monoxide concentration set value (S41) is performed in the same manner as the selective catalytic reduction system operating process according to the first embodiment.

일산화탄소 센서에 의해 촉매를 통과한 배기가스에 포함된 일산화탄소 농도를 측정하여 일산화탄소 농도의 측정값과 설정된 일산화탄소 농도 설정값을 비교(S41)한다. By measuring the carbon monoxide concentration contained in the exhaust gas passing through the catalyst by the carbon monoxide sensor to compare the measured value of the carbon monoxide concentration and the set carbon monoxide concentration set value (S41).

일산화탄소 센서에 의해 측정된 일산화탄소 농도의 측정값이 설정된 일산화탄소 농도 설정값을 초과하는 경우, 일산화탄소 센서에 의해 촉매를 통과한 배기가스에 포함된 일산화탄소 농도를 재측정(S42)한다.When the measured value of the carbon monoxide concentration measured by the carbon monoxide sensor exceeds the set carbon monoxide concentration set value, the carbon monoxide concentration contained in the exhaust gas passing through the catalyst by the carbon monoxide sensor is remeasured (S42).

일산화탄소 센서에 의해 재측정된 일산화탄소 농도의 측정값이 설정된 일산화탄소 농도 설정값 미만인지 판단(S43)한다.It is determined whether the measured value of the carbon monoxide concentration re-measured by the carbon monoxide sensor is less than the set carbon monoxide concentration setting value (S43).

일산화탄소 센서에 의해 측정된 일산화탄소 농도의 측정값이 설정된 일산화 탄소 농도 설정값 이상인 경우, 일산화탄소 센서에 의해 촉매를 통과한 배기가스에 포함된 일산화탄소 농도를 재측정(S42)한다.When the measured value of the carbon monoxide concentration measured by the carbon monoxide sensor is equal to or higher than the set carbon monoxide concentration set value, the carbon monoxide concentration included in the exhaust gas passing through the catalyst by the carbon monoxide sensor is remeasured (S42).

일산화탄소 센서에 의해 재측정된 일산화탄소 농도의 측정값이 설정된 일산화 탄소 농도 설정값 미만인 경우, 가열부에 의해 승온된 배기가스의 온도를 온도센서로 검출하며 검출된 배기가스 온도와 설정된 온도값을 비교(S45)한다.When the measured value of the carbon monoxide concentration re-measured by the carbon monoxide sensor is less than the set carbon monoxide concentration setting value, the temperature of the exhaust gas heated by the heating unit is detected by a temperature sensor and the detected exhaust gas temperature is compared with the set temperature value ( S45).

가열부에 의해 승온된 배기가스의 온도를 온도센서로 검출하며 검출된 배기가스 온도와 설정된 온도값을 비교(S45) 이후의 동작과정은 제1 실시예에 따른 선택적 촉매 환원 시스템 동작과정과 동일하게 동작된다.The temperature of the exhaust gas heated by the heating unit is detected by a temperature sensor, and the operation process after comparing the detected exhaust gas temperature with a set temperature value (S45) is the same as the operation of the selective catalytic reduction system according to the first embodiment. It works.

이와 같은 동작과정을 수행하면 효과적으로 촉매를 재생할 수 있다.Performing such an operation process can effectively regenerate the catalyst.

또한, 이와 같은 동작과정은 선택적 환원 촉매 시스템의 제1 개폐부재 및 제2 개폐부재의 품질에 따른 오차로 발생되는 일산화탄소 농도값의 변화에 유연하게 대처할 수 있다. 즉, 작업자가 선택적 환원 촉매 시스템을 제작시 제1 개폐부재 및 제2 개폐부재의 품질에 따라 제어부의 동작과정을 달리 설정할 수 있어 제어부가 일산화탄소 제1 개폐부재 및 제2 개폐부재의 품질에 관계없이 일산화탄소 농도로부터 촉매재생 동작 종료 시점을 판단할 수 있다.In addition, such an operation process can flexibly cope with a change in the carbon monoxide concentration value caused by an error according to the quality of the first opening and closing member of the selective reduction catalyst system. That is, when the operator manufactures the selective reduction catalyst system, the operation process of the controller can be set differently according to the quality of the first opening member and the second opening member, so that the controller can be used regardless of the quality of the first opening member and the second opening member. The end point of the catalyst regeneration operation can be determined from the carbon monoxide concentration.

이상 첨부된 도면을 참조하여 본 발명의 실시예를 설명하였지만, 본 발명이 속하는 기술분야의 당업자는 본 발명이 그 기술적 사상이나 필수적 특징을 변경하지 않고 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다.Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. will be.

그러므로 이상에서 기술한 실시예는 모든 면에서 예시적인 것이며 한정적인 것이 아닌 것으로서 이해되어야 하고, 본 발명의 범위는 상기 상세한 설명은 후술하는 특허청구범위에 의하여 나타내어지며, 특허청구범위의 의미 및 범위 그리고 그 등가개념으로부터 도출되는 모든 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is represented by the following detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

<부호의 설명><Description of the code>

100: 메인 유로 101: 선택적 촉매 환원 시스템100: main euro 101: selective catalytic reduction system

110: 서브 유로 200: 반응기110: sub-channel 200: reactor

210: 촉매 310: 제1 개폐부재210: catalyst 310: first opening and closing member

320: 제2 개폐부재 400: 순환유로320: second opening and closing member 400: circulation flow path

500: 블로워 610: 일산화탄소 센서500: blower 610: carbon monoxide sensor

620: 온도센서 630: 유량센서620: temperature sensor 630: flow sensor

640: 압력센서 700: 제어부640: pressure sensor 700: control unit

800: 가열부 800: heating unit

S10: 개폐부재 폐쇄 단계 S20: 설정값 결정 단계S10: closing step of closing member S20: setting value determining step

S30: 블로워 작동 단계 S31: 유량 비교단계S30: Blower operation step S31: Flow rate comparison step

S40: 가열부 작동 단계 S41: 일산화탄소 농도 비교 단계S40: heating unit operation step S41: carbon monoxide concentration comparison step

S42: 일산화탄소 농도 재측정 단계 S43: 일산화탄소 재측정 농도 비교 단계S42: carbon monoxide concentration re-measurement step S43: carbon monoxide re-measurement concentration comparison step

S45: 온도 비교 단계 S50: 시간 비교 단계S45: temperature comparison step S50: time comparison step

Claims (4)

배기가스가 통과하는 메인 유로;A main flow path through which exhaust gas passes; 상기 메인 유로 상에 배치되며 내부에 촉매가 설치된 반응기;A reactor disposed on the main flow path and installed with a catalyst therein; 상기 메인 유로 상에 설치되어 상기 반응기로 유입되는 배기가스의 흐름을 절환하는 제1 개폐부재;A first opening / closing member installed on the main flow path to switch the flow of exhaust gas flowing into the reactor; 상기 메인 유로 상에 설치되어 상기 반응기를 통과한 배기가스의 흐름을 절환하는 제2 개폐부재;A second opening / closing member installed on the main flow path for switching a flow of exhaust gas passing through the reactor; 상기 제1 개폐부재와 상기 반응기 전단 사이의 일 지점과 상기 제2 개폐부재와 상기 반응기 후단 사이의 타 지점을 연결하는 순환유로;A circulation passage connecting one point between the first opening / closing member and the front end of the reactor and another point between the second opening and closing member and the rear end of the reactor; 상기 반응기와 상기 순환유로 사이에서 배기가스를 순환 시키는 블로워; A blower for circulating exhaust gas between the reactor and the circulation passage; 상기 촉매를 통과한 배기가스에 포함된 일산화탄소 농도를 검출하는 일산화탄소 센서; 및A carbon monoxide sensor for detecting the concentration of carbon monoxide contained in the exhaust gas passing through the catalyst; And 상기 촉매의 재생을 위해 상기 제1 개폐부재와, 상기 제2 개폐부재, 및 상기 블로워를 제어하여 촉매재생 동작을 수행하는 제어부Control unit for performing a catalyst regeneration operation by controlling the first opening and closing member, the second opening and closing member, and the blower for the regeneration of the catalyst 를 포함하며,Including; 상기 제어부는 상기 촉매재생 동작 중에 상기 제1 개폐부재와 상기 제2 개폐부재를 닫고 상기 블로워를 작동시키며, The control unit closes the first opening and closing member and the second opening and closing member during the catalyst regeneration operation to operate the blower, 상기 일산화탄소 센서에 의해 검출된 검출값이 기설정된 일산화탄소 농도 설정값을 초과할 때 상기 촉매재생 동작을 종료하는 선택적 촉매 환원 시스템.And the catalytic regeneration operation is terminated when the detected value detected by the carbon monoxide sensor exceeds a preset carbon monoxide concentration setting value. 배기가스가 통과하는 메인 유로;A main flow path through which exhaust gas passes; 상기 메인 유로 상에 배치되며 내부에 촉매가 설치된 반응기;A reactor disposed on the main flow path and installed with a catalyst therein; 상기 메인 유로 상에 설치되어 상기 반응기로 유입되는 배기가스의 흐름을 절환하는 제1 개폐부재;A first opening / closing member installed on the main flow path to switch the flow of exhaust gas flowing into the reactor; 상기 메인 유로 상에 설치되어 상기 반응기를 통과한 배기가스의 흐름을 절환하는 제2 개폐부재;A second opening / closing member installed on the main flow path for switching a flow of exhaust gas passing through the reactor; 상기 제1 개폐부재와 상기 반응기 전단 사이의 일 지점과 상기 제2 개폐부재와 상기 반응기 후단 사이의 타 지점을 연결하는 순환유로;A circulation passage connecting one point between the first opening / closing member and the front end of the reactor and another point between the second opening and closing member and the rear end of the reactor; 상기 반응기와 상기 순환유로 사이에서 배기가스를 순환 시키는 블로워; A blower for circulating exhaust gas between the reactor and the circulation passage; 상기 촉매를 통과한 배기가스에 포함된 일산화탄소 농도를 검출하는 일산화탄소 센서; 및A carbon monoxide sensor for detecting the concentration of carbon monoxide contained in the exhaust gas passing through the catalyst; And 상기 촉매의 재생을 위해 상기 제1 개폐부재와, 상기 제2 개폐부재, 및 상기 블로워를 제어하여 촉매재생 동작을 수행하는 제어부Control unit for performing a catalyst regeneration operation by controlling the first opening and closing member, the second opening and closing member, and the blower for the regeneration of the catalyst 를 포함하며,Including; 상기 제어부는 상기 촉매재생 동작 중에 상기 제1 개폐부재와 상기 제2 개폐부재를 닫고 상기 블로워를 작동시키며, The control unit closes the first opening and closing member and the second opening and closing member during the catalyst regeneration operation to operate the blower, 상기 제어부는 상기 반응기와 상기 순환유로 사이를 순환하는 배기가스의 압력이 저하되는 경우, 상기 일산화탄소 센서에 의해 검출된 검출값이 기설정된 일산화탄소 농도 설정값을 초과하고, 상기 검출값이 상기 설정값보다 낮아질 때 상기 촉매재생 동작을 종료하는 선택적 촉매 환원 시스템.When the pressure of the exhaust gas circulating between the reactor and the circulation passage decreases, the control unit detects that the detected value detected by the carbon monoxide sensor exceeds a preset carbon monoxide concentration setting value, and the detected value is greater than the set value. Selective catalytic reduction system to terminate the catalytic regeneration operation when lowered. 제1항 또는 제2항에서,The method of claim 1 or 2, 상기 촉매재생 동작 중에 순환되는 배기가스의 유량을 검출하는 유량센서를 더 포함하며,Further comprising a flow rate sensor for detecting the flow rate of the exhaust gas circulated during the catalyst regeneration operation, 상기 유량센서에서 검출된 유량이 기설정된 유량값 미만일 때 상기 블로워는 회전속도가 증가되는 선택적 촉매 환원 시스템. And when the flow rate detected by the flow rate sensor is less than a predetermined flow rate value, the blower is increased in rotational speed. 제3항에서,In claim 3, 상기 순환유로를 통과하는 배기가스를 승온 시키는 가열부; 및A heating unit configured to heat up the exhaust gas passing through the circulation passage; And 상기 촉매재생 동작 중에 상기 반응기와 상기 순환유로 사이에서 순환되는 배기가스의 온도를 검출하는 온도센서를 더 포함하며,Further comprising a temperature sensor for detecting the temperature of the exhaust gas circulated between the reactor and the circulation passage during the catalyst regeneration operation, 상기 온도센서에서 검출된 배기가스의 온도가 기설정된 배기가스 온도값 미만일 때 상기 가열부는 승온되는 선택적 촉매 환원 시스템.And the heating part is heated when the temperature of the exhaust gas detected by the temperature sensor is less than a predetermined exhaust gas temperature value.
PCT/KR2014/005793 2013-09-09 2014-06-30 Selective catalyst reduction system Ceased WO2015034168A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2013-0107947 2013-09-09
KR1020130107947A KR101461338B1 (en) 2013-09-09 2013-09-09 Selective catalytic reduction system

Publications (1)

Publication Number Publication Date
WO2015034168A1 true WO2015034168A1 (en) 2015-03-12

Family

ID=52290566

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2014/005793 Ceased WO2015034168A1 (en) 2013-09-09 2014-06-30 Selective catalyst reduction system

Country Status (2)

Country Link
KR (1) KR101461338B1 (en)
WO (1) WO2015034168A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115614762A (en) * 2022-11-14 2023-01-17 湖南天闻新华印务有限公司 Printing oven tail gas processing apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102178597B1 (en) * 2015-12-21 2020-11-13 현대중공업 주식회사 Apparatus and Method for Catalyst Mnagement in Vessel Denitrifing System

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5618499A (en) * 1995-01-20 1997-04-08 The Babcock & Wilcox Company Catalyst outage protection system
US20040112046A1 (en) * 2002-12-13 2004-06-17 Prasad Tumati Thermal management of integrated emission reduction system
KR100984548B1 (en) * 2009-09-18 2010-10-01 광성(주) Scr system for ship or overland plant
WO2012027654A2 (en) * 2010-08-27 2012-03-01 Alstom Technology Ltd. System and method for control and optimization of a pulverized coal boiler system
KR101236782B1 (en) * 2011-12-19 2013-02-28 에스코 주식회사 A smoke reduction apparatus of a exhaust gas

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9007456A (en) * 1989-06-20 1992-04-28 Emitec Emissionstechnologie PROCESS AND DEVICE FOR THE GENERATION OF HEAT THROUGH FLAMeless COMBUSTION OF A FUEL IN A GAS CHAIN
JP2004081999A (en) 2002-08-27 2004-03-18 Toppan Printing Co Ltd Exhaust gas treatment method and exhaust gas treatment system
JP2009031080A (en) 2007-07-26 2009-02-12 Miura Co Ltd System for reducing harmful substance and combustion device
KR101254915B1 (en) 2012-05-30 2013-04-18 두산엔진주식회사 Power plant for ship with selective catalytic reuction system and auxiliary power generation system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5618499A (en) * 1995-01-20 1997-04-08 The Babcock & Wilcox Company Catalyst outage protection system
US20040112046A1 (en) * 2002-12-13 2004-06-17 Prasad Tumati Thermal management of integrated emission reduction system
KR100984548B1 (en) * 2009-09-18 2010-10-01 광성(주) Scr system for ship or overland plant
WO2012027654A2 (en) * 2010-08-27 2012-03-01 Alstom Technology Ltd. System and method for control and optimization of a pulverized coal boiler system
KR101236782B1 (en) * 2011-12-19 2013-02-28 에스코 주식회사 A smoke reduction apparatus of a exhaust gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115614762A (en) * 2022-11-14 2023-01-17 湖南天闻新华印务有限公司 Printing oven tail gas processing apparatus

Also Published As

Publication number Publication date
KR101461338B1 (en) 2014-11-20

Similar Documents

Publication Publication Date Title
WO2015034167A1 (en) Selective catalyst reduction system
KR20020077533A (en) Method and device for reforming exhaust filter
WO2014208839A1 (en) Selective catalytic reduction and catalytic regeneration system
WO2014030971A1 (en) Exhaust gas treatment apparatus
WO2015034168A1 (en) Selective catalyst reduction system
WO2017018559A9 (en) Device for cooling and heating urea solution for construction machine, and control method therefor
WO2020040430A1 (en) Air purification device
JP4203355B2 (en) EGR device for diesel engine
JP3250645B2 (en) Exhaust gas purification equipment
WO2016133226A1 (en) Torque control system for dpf regeneration
JP2005299474A (en) Exhaust gas purification system
WO2013048027A1 (en) Device for preventing pollution of vehicle injection nozzle
WO2022131502A1 (en) Hot water supply device, control method for same, and water treatment device
WO2016178444A1 (en) Urea-water solution heating and cooling devices for construction equipment
WO2018043948A1 (en) Selective catalytic reduction system
JPH11101122A (en) Particulate removing device
KR101662446B1 (en) Exhaust gas purification system
WO2024219540A1 (en) Volatile organic compound treatment system
JP3515483B2 (en) Exhaust gas purification system
JPH10299456A (en) Method and device for removing black smoke
KR101231408B1 (en) control device for regenerating catalyzed particulate filter
KR100553193B1 (en) Recyclable Soot Collector
KR100804397B1 (en) Apparatus and method for controlling oxygen concentration in a furnace by purging with flue gas
KR102824740B1 (en) Apparatus and method for controlling temperature of boiler exhaust gas
JP3564194B2 (en) Regeneration method of catalyzed ceramic filter

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14841639

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14841639

Country of ref document: EP

Kind code of ref document: A1