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US20130220373A1 - Method and apparatus for automatic removal of carbon deposits from the oven chambers and flow channels of non-recovery and heat-recovery coke ovens - Google Patents

Method and apparatus for automatic removal of carbon deposits from the oven chambers and flow channels of non-recovery and heat-recovery coke ovens Download PDF

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Publication number
US20130220373A1
US20130220373A1 US13/821,977 US201113821977A US2013220373A1 US 20130220373 A1 US20130220373 A1 US 20130220373A1 US 201113821977 A US201113821977 A US 201113821977A US 2013220373 A1 US2013220373 A1 US 2013220373A1
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Prior art keywords
coke oven
compressed air
oven chamber
downcomer
coke
Prior art date
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Abandoned
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US13/821,977
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English (en)
Inventor
Ronald Kim
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ThyssenKrupp Industrial Solutions AG
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ThyssenKrupp Uhde GmbH
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Publication of US20130220373A1 publication Critical patent/US20130220373A1/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B43/00—Preventing or removing incrustations
    • C10B43/02—Removing incrustations
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B15/00—Other coke ovens
    • C10B15/02—Other coke ovens with floor heating
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B43/00—Preventing or removing incrustations
    • C10B43/02—Removing incrustations
    • C10B43/10—Removing incrustations by burning out
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Definitions

  • the invention relates to a method for automatic removal of carbon deposits from flow channels in “Non-Recovery” and “Heat-Recovery” coke ovens, there being utilized one coke oven bank typically comprised of several coke oven chambers arranged side by side for cyclical carbonization of coal, and there being used an air dosage facility operating at positive pressure in order to remove carbon deposits accumulating in flow cross-sections of the oven system by combustion and thereby counteracting a reduction of the oven performance rate.
  • the invention also relates to a device by means of which this method can be implemented, wherein this device is integrated into the coke oven bank and at least into one coke oven chamber, so that carbon deposits can be removed during operation without modifying any arrangement.
  • Carbonization of coal to obtain coke is often accomplished in coke oven chambers of the so-called “Non-Recovery” or “Heat Recovery” type which are distinguished from conventional coke oven chambers in that the coke oven gas evolving during coal carbonization is not captured and recovered but utilized for combustion and heating.
  • the gas evolving during coal carbonization streams into a gas space located above the coke cake where partial combustion of the coke oven gas occurs with a sub-stoichiometric quantity of air.
  • the gas space above the coke cake is also called primary heating space.
  • Partly burnt coking gas from the primary heating space is then passed via so-called “downcomer” channels into flue gas channels located under the coke oven chamber bottom floor and provided for complete combustion of partially burnt coke oven gas. These are supplied with secondary combustion air through secondary air soles connected to the atmosphere outside.
  • the gas space under the coke cake is also called secondary heating space.
  • the vertically arranged downcomer channels pointing downwards in the direction of flow are located in non-frontal side walls of the coke oven chambers whereby partially burnt coke oven gas streams into the flue gas channels.
  • coke oven chambers comprised of downcomer channels in side walls
  • This invention relates to a device for feeding and controlling of secondary air from secondary air ducts into flue gas channels of horizontal coke oven chambers.
  • the flue gas channels are located underneath the coke oven chamber floor on which coal carbonization is realized.
  • Controlling elements which can precisely control the air flow into the flue gas channels are mounted in the connecting channels between the flue gas channels and secondary air ducts which serve for the supply of secondary air.
  • the coke oven chamber is comprised of so-called “downcomer” channels for discharge of partially burnt gases from the carbonization process which are integrated in the lateral coke oven chamber wall, these “downcomer” channels connecting the coke oven chamber interior with the flue gas channels.
  • the number of downcomer channels in one coke oven chamber wall amounts up to 12, so a total of 24 downcomer channels can be provided per oven.
  • the downcomer channels are downwards directed and in the majority of layouts, they are arranged in the walls of coke oven chambers because two walls each laterally enclose one coke oven chamber.
  • the flow cross-section can be altered by means of an adjusting element, thus it is possible to adjust the effluent gas volume stream from a channel in longitudinal oven direction.
  • Partially burnt coke oven gas is composed of gas components, i.e. hydrogen, carbon monoxide, water, methane as well as, though in lesser portions, ethane, ethene, propane, propene and higher-grade hydrocarbons, for example benzene, toluene, xylene.
  • gas components i.e. hydrogen, carbon monoxide, water, methane as well as, though in lesser portions, ethane, ethene, propane, propene and higher-grade hydrocarbons, for example benzene, toluene, xylene.
  • carbon deposits thus formed are composed of tar-laden, soot-forming compounds, and more particularly of graphite, and in the course of operating time these deposits may build-up in substantial quantities.
  • these deposits accumulate in the downcomer channels in case temperatures in these channels are too low and if no further combustion air is admitted. Thereby, these deposits constrain or block the flow cross-sections of the downcomer channels.
  • U.S. Pat. No. 6,187,148 B1 describes a valve for a Non-Recovery coke oven through which the gas pressure in the interior of a coke oven chamber can be better controlled and whereby a supply of air into the downcomer channels is feasible.
  • the valve has a rotating plug with a beveled end which progressively connects or disconnects the interior cavity of a coke oven chamber with the downcomer channel in order to control and regulate the gas pressure in the oven interior.
  • the volume of combustion air can be controlled as a function of the temperature gradients admitted into the oven.
  • these cracked hydrocarbon compounds preferably deposit at the entrance cross-sections or within the downcomer channels directed downwardly into the lower oven, for example in form of elementary carbon, graphite, tar, soot or similar compounds.
  • Carbon-laden deposits pose a noticeable factor of interference for the operation of coke oven chambers. For example, such deposits constrain gas-conducting facilities so that the flow of gas for heating is slowed down or even prevented.
  • a permanent supply of air into the downcomer channels of the downwardly directed lateral chamber walls already leads to a complete combustion of the partially burnt crude gases and on account of the reduced heating performance associated therewith it is non-desired in flue gas channels further downstream underneath the oven chamber.
  • the downcomer channels are constrained or blocked, the negative pressure in the oven chamber above the coal is reduced or it may even happen that a positive pressure is developed.
  • the aspirated portion of air is reduced, and with a positive pressure, the required primary combustion air can no longer stream into the oven chamber.
  • released crude gas escapes from primary air opening ports in the oven top and oven door, thereby causing a substantial ecological burden. Therefore, possibilities are searched for to either avoid or periodically remove such deposits.
  • a visual monitoring is non-desired for practical and economic considerations.
  • a certain amount of coal is charged at ambient temperature into the oven chamber to be charged and operated sub-stoichiometrically above the oven sole. Owing to this circumstance, a temperature drop which can be documented by thermocouples usually arranged in the oven chamber vault area initially occurs in this oven chamber.
  • the temperature drop in an oven chamber is characterized in that a temperature minimum of the oven chamber temperature ranges between 800° C. and 1150° C., depending on the oven type.
  • DE 102006004669 A1 teaches a coking oven in flat construction style, a so-called non-recovery or heat-recovery coking oven which is comprised at least of a measuring device to measure the concentration of gas constituents of a coke oven chamber, coke oven sole and/or waste gas flue, and in which the optimal feed of primary and/or secondary air is determined and controlled via a process computer on the basis of these data.
  • the invention also covers a coal carbonization process utilizing such a coking oven.
  • the invention teaches the application of measuring parameters for automated control of the feed of combustion air, but it does not describe the removal of carbonaceous deposits with the peculiarities of this task.
  • Non-recovery and heat-recovery coke ovens operate in negative pressure mode, whereof an emission-friendly appearance is derived for this oven type.
  • the level of the negative pressure in the chambers is usually adjusted and set through a suction blower or by exploiting the natural draft of a chimney so as to make a sufficient stream of air volume available for the combustion of the maximal crude gas volume stream escaping during the initial phase of coal carbonization in order to avoid flame-off losses and emissions through primary air opening ports and oven doors.
  • Negative pressures in the oven chamber above the coal cake may range between ⁇ 10 Pa and ⁇ 100 Pa.
  • the present invention solves this task by providing for a method according to which compressed air is periodically conducted into the downcomer channels depending on at least one measuring parameter so that carbon deposits accumulating therein are removable by an injection of compressed air blown into the downcomer channel. Removal of coverings is accomplished by way of combustion in such a manner that the carbonaceous coverings react with the free OH radicals as well as with the oxygen of the gas introduced and that an additional suction and cleaning effect is achieved by the inlet pulse of compressed air. Injection of compressed air is performed with advantage through the inspection ports of the downcomer channels because these are easily accessible and because a retrofit is readily possible.
  • Control of air injection can be accomplished via a measurement of pressure at any spots of the coke oven chamber.
  • control of air injection for example, can also be accomplished via a measurement of temperature at any spots of the coke oven chamber.
  • the introduced compressed air contains the oxygen required to burn-off the coverings.
  • a gas enriched with oxygen may also be utilized to implement the present invention.
  • Control of air injection can also be accomplished via an operationally optimized timer, whereby compressed air is injected within fixed time intervals for an optional period of time into the downcomer channel.
  • the time intervals are then stipulated empirically, for example by evaluation of visual check-ups of the downcomer channels.
  • the present invention makes it possible to remove carbonaceous coverings during operation without requiring an interruption of operation or dismantling of a coke oven chamber.
  • Air or oxygen-laden gas is conducted with the desired approach through measuring signals or upon expiry of a determined time interval into the downcomer channels so that a temporal introduction of oxygen-laden gas is effected.
  • a partial cooling-down of the downcomer channels involved by an excessive or uncontrolled supply of oxygen-laden gas and entailing possible damage to a coke oven chamber is thus avoided.
  • Claim is laid in particular to a method for automatic removal of carbon deposits from coke oven chambers and flow channels in “Non-Recovery” and “Heat Recovery” coke ovens, wherein
  • This measuring parameter is a pressure parameter which is measured at least at one spot in the coke oven. It is then related to an already known design value or to another measurable pressure value. As a rule, one or two individual pressure parameters are thus measured.
  • the pressure parameter is a pressure differential measured in the combustion chambers below and above the coal and coke cake, i.e. between the primary heating space and the flue gas channels underneath the coke oven chamber and which amount to ⁇ p>30 Pa to release and trigger the blow of compressed air injection.
  • the pressure parameter may be a pressure differential measured between the gas space of a coke oven chamber, the primary heating space, and the ambient atmosphere, and which amounts to ⁇ 70 Pa ⁇ p ⁇ 40 Pa to release and trigger the blow of compressed air injection.
  • the measuring parameter may also be a temperature parameter which is measured at least at one spot in the coke oven.
  • the control of air injection can also be accomplished via a timer according to fixed time intervals for certain time periods, without requiring an additional evaluation of measured values.
  • the partial stream of compressed air is then periodically conducted with a fixed time interval into at least one downcomer channel so that carbon deposits accumulating therein are removable by an injection of compressed air blown into the downcomer channel.
  • the time intervals are then stipulated empirically, for example by evaluation of visual check-ups of the downcomer channels.
  • the compressed air is for example a normal, non-dried air with an atmospheric composition. It is brought through a compressor to a pressure level that is suitable for introduction or injection into the inspection ports of the downcomer channels.
  • the compressed air may also be air which is enriched with oxygen.
  • the compressed air may also be replaced with pure oxygen.
  • the compressed air may also be enriched with combustion-inert gases.
  • the compressed air may also be enriched with nitrogen or waste gas branched off from the combustion process.
  • the medium may also be pure oxygen.
  • the compressed air may be air which is mixed with the partially or completely burnt waste gas of the coke oven chamber.
  • the medium is typically supplied at a positive pressure of 0.1 to 10 bar.
  • the medium may be dried or non-dried.
  • the measuring values of the probes are advantageously picked-up, evaluated and controlled by a digital computer.
  • a digital computer it is already sufficient if the measuring value of at least one pressure or temperature parameter is picked-up, evaluated and controlled by a digital computer so that this computer depending on the measuring values turns on at least one blow of compressed air into an ancillary piping and the associated downcomer channels. But the computer may also turn on at least one blow of compressed air injection into a distribution mains and the associated downcomer channel depending on the measuring values.
  • the measuring value represents an empirical determination of a time interval according to which this partial stream of compressed air is periodically conducted into at least one downcomer channel.
  • the empirical values can be determined visually or by preceding measurements.
  • a removal of carbonaceous coverings can be performed at each downcomer channel of all coke oven chambers. But a removal of carbonaceous coverings can also be performed at individual downcomer channels of all coke oven chambers, at each downcomer of one coke oven bank only, or at each individual downcomer of just one coke oven bank. It is also conceivable to effect the removal of carbonaceous coverings at further spots of the coke oven chamber, although the downcomer channels represent the preferred place of applying the present invention.
  • a disproportional increase in primary air volume is not possible because the process requires sub-stoichiometrical conditions in the combustion chamber above the charge.
  • Claim is also laid to a device by way of which the inventive method can be implemented. Claim is laid in particular to a device for automatic removal of carbon deposits from coke oven chambers and flow channels in “Non-Recovery” and “Heat Recovery” coke ovens, the said device comprised of
  • the compressed air can be furnished by a compressor. It is then fed into a compressed air main. With advantage it extends transversely along the coke oven bank. This can be arranged at the level of the top of the coke oven bank. But for example, this can also be arranged at the level of service platforms of the oven sole located laterally at the oven front sides of the coke oven bank. Moreover, an arrangement of this line at the level of the ground floor is also conceivable.
  • the piping on the top of the coke oven bank is then comprised of a branch which terminates in its further course into an ancillary pipe extending in longitudinal oven direction from the pusher side to the coke side of the oven, and from which at least another piping branches off in the further course, said piping terminating into a pipe end which is suitable to emit compressed air in a downcomer channel.
  • each coke oven chamber of a coke oven bank may have a branch at the transversely extending compressed air mains, said branch then leading in another branch into each downcomer of the coke oven chamber wall.
  • each coke oven chamber has a branch from which all downcomer channels are supplied with compressed air in further branches.
  • each coke oven chamber has a branch at the transversely extending compressed air mains, whereby only one downcomer channel is furnished with compressed air.
  • a pipe end suitable to emit compressed air terminates in each downcomer channel of each coke oven chamber of a coke oven chamber bank.
  • At least one pipe end has a built-on nozzle jet attachment which is suitable to eject a compressed air blow.
  • the outlet openings of the nozzle jet can be so configured that the compressed air streams at an angle to the vertical line greater than 0° into the cross-section of the downcomer aperture.
  • at least one pipe end is horizontally angled.
  • the pipe end which is suitable to eject a compressed air bow can be pointed to the entrance opening of the downcomer cross-section.
  • the outlet opening of the pipe end can be slotted, rectangular, annular or circular as well as include a combination of several outlet shapes of these.
  • the pipe shapes or configurations for pipe ends as described hereinabove can be implemented at just one pipe or pipe end, but also at an arbitrary number of pipes or pipe ends.
  • the pipe end is made from any material that should be resistant to heat.
  • the pipe end is made from a heatproof iron material, a ceramic silica material, or a corundum material.
  • this material is selected from the group of heat-resistant steels or refractory ceramic construction materials.
  • those materials especially suitable are, for example, materials especially rich in alumina as well as highly burnt materials based on the raw material corundum with Al 2 O 3 -portions ranging between 50-94%, SiO 2 -portions ranging between 1.5-46%, Cr 2 O 3 -portions less than 29%, Fe 2 O 3 -portions less than 1.6% and ZrO 2 -portions less than 32%, because these materials are characterized by a high temperature of application over 1500° C.
  • the ancillary piping is comprised of an automatable valve cock element to serve as shutoff device to control the stream of compressed air.
  • the ancillary piping may also be comprised of an automatable slide gate element to control and regulate the compressed air flow.
  • At least one pipe end with or without a built-on nozzle attachment may be comprised of an automatable valve cock element to control and regulate the flow of compressed air. But it is also feasible to choose an automatable slide gate element to control and regulate the flow of compressed air.
  • the control of compressed air can be executed by any arbitrary control and/or regulating device.
  • shutoff devices which serve to control and regulate the compressed air flow can be actuated, for example, electrically, hydraulically or by compressed air.
  • the element to control and regulate the compressed air flow is actuated hydraulically.
  • the element to control and regulate the compressed air flow is actuated electrically.
  • the element to control and regulate the compressed air flow is actuated pneumatically.
  • the arrangement of measured value probes on the oven top is taken in such a manner that pressure measuring probes for pressure measurement are conducted through the inspection ports into the downcomer channels of the coke oven chamber to be liberated from carbon deposits. But these can also be conducted into the primary heating space. For example, 1 to 24 pressure measuring probes for pressure measurement are conducted through the inspection ports into the downcomer channels of the coke oven chambers to be liberated from carbon deposits. However, for pressure measurement, it is also possible to conduct 1 to 3 pressure measuring probes through the oven top of the coke oven chamber to be liberated from carbon deposits. It is also feasible to conduct 1 to 2 pressure measuring probes for pressure measurement laterally through the oven chamber doors of the coke oven chamber to be liberated from carbon deposits.
  • the arrangement of the other measuring value probes is done in such a manner that 1 to 4 pressure measuring probes for pressure measurement are conducted through the lateral front walls of the oven chamber located under the coke oven chamber door and covering the secondary heating space or into the secondary air sole.
  • 1 to 8 pressure measuring probes it is also feasible to conduct 1 to 8 pressure measuring probes through the lateral front walls of the oven chamber located under the coke oven chamber door and covering the secondary heating space or into the secondary air sole.
  • 1 to 2 pressure measuring probes for pressure measurement in the connecting channels between the secondary heating space under the coal cake and the waste gas collecting duct of the coke oven bank.
  • the pressure measurements can also be taken in the connecting channels between the secondary heating chamber under the coal cake and the waste gas collecting duct of the coke oven bank.
  • there is an upwardly directed stream in these channels because the waste gas collecting duct is arranged on the oven top.
  • thermocouple is conducted in the vault crest of the coke oven chamber to be liberated from carbon deposits through the oven top or through the lateral oven doors above the coke cake. Furthermore, at least one thermocouple can be conducted into the gas space above the coke cake through the coke oven chamber doors of the coke oven chamber to be liberated from carbon deposits. It is also possible to conduct at least one thermocouple through the inspection ports into the downcomer channels of the coke oven chamber to be liberated from carbon deposits. Since no temperature differential versus another measuring value is needed to take-up the temperature measuring values, the installation of temperature measuring probes at just one of these positions is feasible.
  • the control signal can also be given according to a fixed time interval without measuring data acquisition.
  • the coke oven bank in which at least one coke oven chamber is to be liberated from carbonaceous coverings is equipped with a digital computer unit which acquires and evaluates the control values from at least one pressure sensor or one thermocouple, and which controls the compressed air unit so that at least one blow of injected compressed air is turned-on by means of this control unit depending on the measuring values.
  • only the control element per oven wall is actuated that isolates the ancillary pipe extending from pusher side to coke side from the main delivery pipe.
  • the shutoff elements in the ancillary pipe are in open position and are automatically supplied with compressed air as soon as the evaluation unit transmits the signal for opening.
  • the air volume per downcomer channel can be adjusted and set manually by means of the valve cock position or by way of a calibrating element.
  • At least one distribution main which branches off from the ancillary piping or one pipe end with or without built-on nozzle jet attachment is comprised of an automatable valve cock element to control and regulate the compressed air blow.
  • at least one distribution main which branches off from the ancillary piping or one pipe end with or without built-on nozzle jet attachment is comprised of an automatable slide gate element to control and regulate the compressed air blow.
  • the present invention bears the advantage in that carbonaceous coverings and deposits forming in coke oven chambers of the “heat recovery” or “non-recovery” type during operation by pyrolysis of carbonaceous coking gases can be removed without any further operational interruption in a non-mechanical manner. A trouble-free operation of the coke oven chambers is thus feasible. An excessive supply of air and a resultant cooling-off of the downcomer channels are avoided because the feed is controlled by measuring values.
  • FIG. 1 shows a coke oven chamber with laterally arranged downcomer channels which can be seen in a frontal view obliquely laterally from the top.
  • FIG. 2 shows a coke oven bank with an arrangement of two coke oven chambers which can be seen in a frontal view obliquely laterally from the top.
  • FIG. 3 shows a coke oven chamber in a lateral view, which is comprised of a waste gas collecting duct underneath the coke oven chamber doors.
  • FIG. 4 shows a coke oven chamber in a lateral view which is comprised of a waste gas collecting duct on the top of the coke oven chamber.
  • FIG. 1 shows a coke oven chamber ( 1 ) on which the coke oven chamber doors ( 2 ) have been removed so that the coke oven chamber opening ( 3 ) can be seen.
  • the coal cake ( 4 ) which is carbonized and which therefore develops coking gas ( 5 ).
  • the coking gas ( 5 ) streams into the primary heating space ( 6 ) where it is mixed with a sub-stoichiometric volume of air and partially burnt.
  • the partially burnt coking gas ( 7 ) streams through lateral openings ( 8 ) in the coke oven chamber wall ( 9 ) into the downcomer channels ( 10 ) where carbonaceous deposits ( 11 ) are formed due to the temperature level and the pyrolysis taking place under sub-stoichiometric conditions.
  • a compressed air main ( 12 ) extending transversely to the coke oven chamber ( 1 )
  • an ancillary piping ( 13 ) branches-off which extends longitudinally to the coke oven chamber ( 1 ).
  • pipes ( 14 ) branch off which feed the individual downcomer channels ( 10 ) with compressed air ( 15 ).
  • the compressed air mains ( 12 ) and the ancillary piping ( 13 ) are also isolated from each other by means of a controllable shutoff valve ( 18 c ) and a control unit ( 18 d ).
  • the pipe end ( 19 ) may be arranged at any arbitrary level in the downcomer channel ( 10 ), but is preferably so arranged that the air ( 15 ) streams onto the spots ( 11 ) where empirically the majority of deposits accumulate.
  • the carbonaceous deposits ( 11 ) in the downcomer channel ( 10 ) are burnt. Partly burnt coking gas is then passed into the secondary heating spaces ( 20 ) where it is completely burnt by the feed of further secondary air ( 21 ).
  • FIG. 2 shows an arrangement of two coke oven chambers ( 1 ) in a coke oven bank ( 22 ), above which a central compressed air main ( 12 ) extending transversely to the coke oven chambers ( 1 ) is arranged.
  • a central compressed air main ( 12 ) extending transversely to the coke oven chambers ( 1 ) is arranged.
  • an ancillary piping ( 13 ) branches-off which extends longitudinally to the coke oven chambers ( 1 ).
  • another distribution mains ( 14 ) branch off which feed the individual pipes ( 14 ) with compressed air ( 15 ).
  • the distribution mains ( 14 ) are comprised of pipe ends ( 19 ), which terminate in the downcomer channels ( 10 ), where the oxygen-laden compressed air ( 15 ) leads to a combustion of carbonaceous coverings and deposits ( 11 ).
  • the distribution mains ( 14 ) are shut-off by shutoff elements ( 18 ), thus making it possible to control the feed of air into these distribution mains ( 14 ).
  • the coking gases ( 5 ) streaming out from the coke cake ( 4 ) are burnt with a sub-stoichiometric volume of air, i.e. primary air ( 23 ).
  • the combustion air ( 23 ) needed for this purpose is supplied through primary air opening ports ( 24 ) in the coke oven chamber top ( 25 ).
  • the downcomer channels ( 10 ) take-up the partially burnt coking gas ( 7 ) from the primary heating space ( 6 ) and lead it into the secondary heating spaces ( 20 ) which are fed with air ( 21 ) via the secondary air soles ( 26 ). Waste gas from the secondary heating space ( 20 ) is conducted into the central waste gas duct ( 27 ).
  • FIG. 3 shows a coke oven chamber ( 1 ) in a lateral view.
  • the frontal coke oven chamber doors ( 2 ) which are illustrated in an embodiment in which the coke oven chamber doors ( 2 ) are perfectly fitted into the coke oven chamber walls ( 28 ) located thereabove.
  • the coking gas ( 5 ) streams into the primary heating space ( 6 ), from where it is conducted via opening ports ( 8 ) into the downcomer channels ( 10 ).
  • the completely burnt coking gas ( 29 ) is passed through a collecting duct ( 30 ) into a central waste gas main ( 27 ) where the waste gas ( 29 ) is collected and utilized in “Heat-Recovery” ovens for recovery of heat.
  • the downcomer channels ( 10 ) may get clogged with carbonaceous coverings ( 11 ). Therefore, they are fed via a central compressed air main ( 12 ) and an ancillary piping ( 13 ) with compressed air which is distributed via distribution mains ( 14 ) with pipe ends ( 19 ) into the downcomer channels ( 10 ). Both the distribution main ( 14 ) and the pipe ends ( 19 ) can be shut-off via valves ( 18 c, 18 ).
  • the valves ( 18 ) in turn are linked to a digital computer unit ( 31 ) which is controlled through control signals from sensors ( 32 ).
  • the sensors ( 32 ) are located in the primary heating space ( 6 ) of the coke oven chamber ( 1 ), where a pressure measuring sensor ( 32 a ) and a thermocouple ( 32 b ) are arranged, and in the secondary heating space ( 20 ) under the coke oven chamber ( 1 ), where also one pressure sensor ( 32 a) and one thermocouple ( 32 b ) element each are arranged, and in the central waste gas main ( 27 ), where one pressure sensor ( 32 a ) each is arranged in the waste gas collecting duct ( 30 ) and in the central waste gas main ( 27 ).
  • the measuring values of the sensors are picked-up by the digital computer unit ( 31 ) which will then activate the valves ( 18 ) of the compressed air mains leading into the downcomer channels ( 10 ).
  • the carbonaceous coverings ( 11 ) in the downcomer channels ( 10 ) are removed.
  • two downcomer channels with carbonaceous coverings ( 11 ) are shown in the sketch.
  • FIG. 4 shows the same coke oven chamber ( 1 ) in a lateral view, but with a waste gas collecting duct ( 27 ) on the top ( 25 ) of the coke oven chamber.
  • a waste gas collecting duct ( 27 ) On the top ( 25 ) it also has a central compressed air mains ( 12 ), from where an ancillary piping ( 13 ) branches off and from where the individual distribution mains ( 14 ) with the pipe ends ( 19 ) branch off with the distribution main ( 14 ) into the downcomer channels ( 10 ).
  • a pressure sensor ( 32 a ) is arranged in the central waste gas main ( 27 ), which is installed here on the top ( 17 ) of the coke oven chamber ( 1 ).
  • Waste gas collecting duct 31
  • Digital computer unit 32 Measuring sensor 32 a Pressure measuring sensor 32 b Temperature measuring sensor

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Coke Industry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
US13/821,977 2010-09-10 2011-08-16 Method and apparatus for automatic removal of carbon deposits from the oven chambers and flow channels of non-recovery and heat-recovery coke ovens Abandoned US20130220373A1 (en)

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DE102010044938A DE102010044938B4 (de) 2010-09-10 2010-09-10 Verfahren und Vorrichtung zur automatischen Entfernung von Kohlenstoffablagerungen aus den Strömungskanälen von "Non-Recovery" und "Heat-Recovery"-Koksöfen
DE102010044938.5 2010-09-10
PCT/EP2011/004110 WO2012031665A1 (fr) 2010-09-10 2011-08-16 Procédé et dispositif pour l'enlèvement automatique de dépôts de carbone des chambres de four et canaux d'écoulement de fours à coke "sans récupération" et "à récupération de chaleur"

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DE102010044938B4 (de) 2012-06-28
CN103221511A (zh) 2013-07-24
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TW201224131A (en) 2012-06-16
CN103221511B (zh) 2015-12-02
AU2011300894A1 (en) 2013-03-28
CL2013000662A1 (es) 2013-08-09
CA2810934A1 (fr) 2012-03-15
KR20140000222A (ko) 2014-01-02
RU2013112665A (ru) 2014-10-20
EP2614127A1 (fr) 2013-07-17
JP2013537243A (ja) 2013-09-30
ZA201302501B (en) 2014-06-25
AR083642A1 (es) 2013-03-13
AU2011300894A8 (en) 2013-04-18
BR112013005635A2 (pt) 2019-09-24
EP2614127B1 (fr) 2015-03-25
CU20130034A7 (es) 2013-09-27
AU2011300894B2 (en) 2016-01-28
PH12013500458A1 (en) 2013-04-29
MX2013002653A (es) 2013-08-29
CO6690795A2 (es) 2013-06-17

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