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WO2009014285A1 - Epurateur-laveur de type par voie humide pour un gaz d'échappement capable de nettoyer facilement un éliminateur - Google Patents

Epurateur-laveur de type par voie humide pour un gaz d'échappement capable de nettoyer facilement un éliminateur Download PDF

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Publication number
WO2009014285A1
WO2009014285A1 PCT/KR2007/006262 KR2007006262W WO2009014285A1 WO 2009014285 A1 WO2009014285 A1 WO 2009014285A1 KR 2007006262 W KR2007006262 W KR 2007006262W WO 2009014285 A1 WO2009014285 A1 WO 2009014285A1
Authority
WO
WIPO (PCT)
Prior art keywords
scrubbing chamber
exhaust gas
wet type
fluid
type scrubber
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/KR2007/006262
Other languages
English (en)
Inventor
In Seob Lee
Hern Kim
Mi Hye Yang
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.)
MIRAE NET CO Ltd
Original Assignee
MIRAE NET 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 MIRAE NET CO Ltd filed Critical MIRAE NET CO Ltd
Publication of WO2009014285A1 publication Critical patent/WO2009014285A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/04—Regenerating the washing fluid

Definitions

  • the present invention relates to a wet type scrubber whose interior is easily cleanable and, more particularly, to a wet type scrubber that can be cleansed without having to take out an eliminator from the interior thereof.
  • FIG. 6 A conventional system for scrubbing an exhaust gas in a wet condition is shown in Fig. 6.
  • the wet type exhaust gas scrubbing system is designed to eliminate dust and other harmful materials contained in the exhaust gas by spraying liquid in front of an eliminator 11 installed within a scrubbing chamber 10.
  • an alkaline solution containing, e.g., caustic soda (NaOH) is sprayed to neutralize the acid exhaust gas.
  • the salt which is generated through the reaction of the acid exhaust gas with the alkaline solution, and the dust are eliminated and discharged in the eliminator 11.
  • the dust and the salt separated in the eliminator 11 are dropped together with water into a fluid reservoir 20 through a drain pipe 21 connected to the bottom of the scrubbing chamber 10.
  • the fluid stored in the fluid reservoir 20 is supplied to and re-circulated through a nozzle 18 by means of a pump 30.
  • the eliminator 11 thus taken out is cleansed with cleansing fluid injected from a high pressure hose and is then put into the scrubbing chamber 10 through the eliminator gateway. Thereafter, the bolts are tightened to close off the eliminator gateway.
  • cleansing fluid injected from a high pressure hose and is then put into the scrubbing chamber 10 through the eliminator gateway. Thereafter, the bolts are tightened to close off the eliminator gateway.
  • Such a cleansing method is time-consuming and laborious and reduces the system operation time.
  • Another object of the present invention is to provide a wet type scrubber for exhaust gas that can be cleansed with increased frequency but with no difficulty, thereby enhancing the efficiency of removing dust, mist, moisture, condensed water and the like from an exhaust gas.
  • a wet type scrubber for exhaust gas comprising: a scrubbing chamber having an bottom wall, a sidewall, an inlet port through which an exhaust gas is introduced into the scrubbing chamber, an outlet port through which the exhaust gas is discharged from the scrubbing chamber and a first drain hole formed in the bottom wall of the scrubbing chamber, the inlet port and the outlet port being arranged to ensure that the exhaust gas flows generally horizontally from the inlet port toward the outlet port; an eliminator arranged within the scrubbing chamber to divide the interior of the scrubbing chamber into an inlet space and an outlet space, the eliminator having a plurality of spaced-apart blades arranged so that the exhaust gas can flow between the blades; a fluid reservoir for storing fluid; a first drain pipe having a first end connected to the first drain hole and a second end connected to the fluid reservoir; a first valve installed in the first drain pipe for openably closing the first drain pipe!
  • the eliminator can be cleansed in an installed state by filling the scrubbing chamber with the fluid.
  • the wet type exhaust gas may further comprise an inlet duct connected to the inlet port of the scrubbing chamber and at least partially positioned higher than the scrubbing chamber and an outlet duct connected to the outlet port of the scrubbing chamber and at least partially positioned higher than the scrubbing chamber.
  • the scrubbing chamber can be changed to a purging tank for cleansing the interior of the scrubbing chamber and the eliminator.
  • the fluid containing, e.g., caustic soda can be filled in the scrubbing chamber by closing the first valve.
  • the gas scrubber can be cleansed with increased frequency but with no difficulty, thereby enhancing the efficiency of removing dust, mist, moisture, condensed water and the like from an exhaust gas.
  • the wet type scrubber for exhaust gas may further comprise an overflow pipe having a first end connected to the outlet duct in a position higher than the scrubbing chamber and a second end connected to the
  • the wet type scrubber for exhaust gas may further comprise a second valve installed in the overflow pipe.
  • the first valve may comprise an electrically controllable valve.
  • the wet type scrubber for exhaust gas may further comprise a level sensor installed within the scrubbing chamber for generating a level signal and a control unit responsive to the level signal for controlling the electrically controllable valve to ensure that the fluid within the scrubbing chamber is kept at a specified 1eve1.
  • the scrubbing chamber may have a second drain hole formed in the sidewall in a vertically spaced-apart relationship with the bottom wall, the eliminator having a bottom end arranged lower than the second drain hole.
  • the wet type scrubber for exhaust gas may further comprise a second drain pipe having a first end connected to the second drain hole and a second end connected to the fluid reservoir, and a third valve installed in the second drain pipe.
  • the wet type scrubber for exhaust gas may further comprise a stirring means for stirring the fluid supplied into the scrubbing chamber.
  • the stirring means may be an aerator for supplying an air into the scrubbing chamber, a stirring screw or an ultrasonic generator.
  • the stirring means is not limited thereto but may be other types of stirrers capable of stirring the fluid filled in the scrubbing chamber.
  • the wet type scrubber for exhaust gas of the present invention it is possible to easily cleanse the eliminator by supplying a cleansing solution the scrubbing chamber in a state that the valve arranged in the drain pipe is closed.
  • the inlet duct and the outlet duct are partially higher than the top of the scrubbing chamber, and the valve is arranged in the drain pipe connected to the bottom of the scrubbing chamber.
  • Such a structural change makes it possible to use the scrubbing chamber as a purging chamber for cleansing the eliminator.
  • the scrubbing chamber can be filled with a cleansing solution containing a detergent such as a caustic soda or the like, whereby the eliminator can be cleansed without having to take out the same from the scrubbing chamber.
  • a cleansing solution containing a detergent such as a caustic soda or the like
  • the eliminator can be cleansed with increased frequency but with no difficulty, which assists in prolonging the scrubber operation time and increasing the exhaust gas scrubbing efficiency.
  • Fig. 1 is a schematic diagram showing a wet type scrubber in accordance with one embodiment of the present invention.
  • FIG. 2 is a schematic diagram showing a wet type scrubber in accordance with another embodiment of the present invention.
  • FIG. 3 is a schematic diagram showing a wet type scrubber in accordance with a further embodiment of the present invention.
  • Fig. 4 is a perspective view illustrating an eliminator employed in the present wet type scrubber.
  • Figs. 5A through 5C are views illustrating different arrangement states of a spray nozzle and an eliminator in the present wet type scrubber.
  • FIG. 6 is a schematic diagram showing a conventional wet type scrubbing system.
  • Fig. 1 is a schematic diagram showing a wet type scrubber in accordance with one embodiment of the present invention.
  • the scrubber shown in Fig. 1 includes a wet type scrubbing chamber 10 that accommodates an eliminator 11 and a spray nozzle 18 for spraying a solution.
  • An inlet port 15 for introducing an exhaust gas therethrough is formed on one side of the scrubbing chamber 10 and an outlet port 17 for discharging the exhaust gas therethrough is formed on the other side of the scrubbing chamber 10.
  • the eliminator 11 is arranged within the scrubbing chamber 10 in such a way as to divide the interior of the scrubbing chamber 10 into an inlet space and an outlet space.
  • a first drain hole 12 is formed in the bottom wall of the scrubbing chamber 10.
  • a support frame 14 for supporting the eliminator 11 in a spaced-apart relationship with the bottom wall of the scrubbing chamber 10 is provided inside the scrubbing chamber 10.
  • the support frame 14 may be omitted insofar as the eliminator 11 is installed not to block the first drain hole 12.
  • the inlet port 15 and the outlet port 17 are arranged to ensure that the exhaust gas flows substantially horizontally within the scrubbing chamber 10.
  • a first drain pipe 21 leading to a fluid reservoir 20 is connected to the first drain hole 12.
  • a first valve 23 for opening and closing the first drain pipe 21 is arranged somewhere along the first drain pipe 21.
  • An inlet duct 3 at least partially extending higher than the top of the scrubbing chamber 10 is connected to the inlet port 15.
  • an outlet duct 4 at least partially extending higher than the top of the scrubbing chamber 10 is connected to the outlet port 17.
  • An overflow pipe 5 leading to the fluid reservoir 20 is connected to the outlet duct 4 at a higher position than the top of the scrubbing chamber 10.
  • a vacuum pump 90 is connected to the outlet duct 4 through a connection duct 2. The vacuum pump 90 serves to discharge the exhaust gas toward a funnel 100.
  • the cleaning fluid stored in the fluid reservoir 20 may be suitably selected depending on the kind of the exhaust gas to be scrubbed. In case where the exhaust gas contains a large amount of dust and dirt, water can be used as the cleaning fluid. If the exhaust gas is acid, a caustic soda (NaOH) solution for neutralization treatment can be used as the cleaning fluid.
  • NaOH caustic soda
  • the cleaning fluid stored in the fluid reservoir 20 is supplied through pipes 31 and 32 to a spray nozzle 18 being arranged within the inlet space of the scrubbing chamber 10 by means of a fluid pump 30.
  • a waste water treating unit for removing sludge or the like present in the cleaning fluid may be employed to prevent the spray nozzle 18 from being clogged.
  • the eliminator 11 includes a top plate 11a with handles, a bottom plate lie, a plurality of blades lib arranged between the top plate 11a and the bottom plate lie, and a holder frame Hd for holding the blades lib.
  • the blades lib are arranged to extend in a vertical direction.
  • the blades lib ensures that the water and the dust removed from the exhaust gas are dropped on the bottom wall of the scrubbing chamber 10 by the gravity.
  • Each of the blades lib has lateral edges that are curved to assist in guiding the stream of the exhaust gas and removing particles borne by the exhaust gas.
  • the top plate 11a and the bottom plate lie have a plurality of grooves Hc-I to which the opposite ends of the blades lib are fitted.
  • the bottom plate lie has a central opening llc-2 through which the water and the dust removed from the exhaust gas are dropped.
  • Figs. 5A through 5C are views illustrating different arrangement states of the spray nozzle 18 and the eliminator 11 in the present wet type scrubber.
  • a single array of spray nozzles 18 is arranged to spray the cleaning fluid in the same direction as the flowing direction of the exhaust gas (indicated by arrows), namely in the direction opposite to that shown in Fig. 1.
  • two arrays of spray nozzles 18 are arranged to spray the cleaning fluid toward each other.
  • two arrays of spray nozzles 18 are arranged between two groups of eliminators 11.
  • the first valve 23 installed in the first pipe 21 is first closed prior to supplying cleaning fluid into the scrubbing chamber 10. Then, the fluid pump 30 is operated to supply the cleaning fluid into the scrubbing chamber 10 until the eliminator 11 is submerged in the cleaning fluid. Since the inlet duct 3 and the outlet duct 4 connected to the inlet port 15 and the outlet port 17 are partially higher than the scrubbing chamber 10 and since the overflow pipe 5 leading to the fluid reservoir 20 is connected to the outlet duct 4, there is no possibility that the cleaning fluid, when supplied in an excessive amount, overflows into the production facilities arranged at the front end of the inlet duct 3 or the vacuum pump 90 provided at the rear end of the outlet duct 4.
  • the fluid stored in the fluid reservoir 20 is used as the cleaning fluid according to the present embodiment, it may be possible to supply separate cleaning fluid through a cleaning fluid supply port formed in the inlet duct 3, the outlet duct 4 or the top of the scrubbing chamber 10.
  • the cleaning fluid supply port is formed in the scrubbing chamber 10
  • it is preferred that the cleaning fluid supply port is arranged on the ceiling wall of the scrubbing chamber 10.
  • water may be used as the cleaning fluid
  • the fluid pump 30 may be continuously operated so that the cleaning fluid can circulate through the scrubbing chamber 10 and the fluid reservoir 20.
  • the first valve 23 is opened to drain the cleaning fluid. At this time, if the volume of the fluid reservoir 20 is too small to receive the cleaning fluid thus drained, it may be possible to discharge the cleaning fluid to the outside. Once the cleansing operation is completed in this manner, the first valve 23 is closed and the exhaust gas is supplied into the scrubbing chamber 10 through the inlet duct 3, thus allowing the wet type scrubber to operate again.
  • Fig. 2 is a schematic diagram showing a wet type scrubber in accordance with another embodiment of the present invention.
  • the wet type scrubber shown in Fig. 2 differs from that shown in Fig. 1 in that an aerator as a means for stirring the fluid is installed within the scrubbing chamber 10.
  • the aerator includes an air supply pipe 50 and a nozzle 51 provided at the end of the air supply pipe 50.
  • a second drain hole 13 is formed in the sidewall of the scrubbing chamber 10 above the support frame 14, the second drain hole 13 being connected to the fluid reservoir 20 by a second drain pipe 22, a third valve 24 being installed in the second drain pipe 22.
  • a further difference resides in that a second valve 25 is installed in the overflow pipe 5.
  • Fig. 3 is a schematic diagram showing a wet type scrubber in accordance with a further embodiment of the present invention.
  • the wet type scrubber shown in Fig. 3 differs from that shown in Fig. 1 in that an aerator as a means for stirring the fluid is installed within the scrubbing chamber 10.
  • the aerator includes an air supply pipe 50 and a nozzle 51 provided at the end of the air supply pipe 50.
  • the wet type scrubber shown in Fig. 3 includes a level sensor 41 installed within the scrubbing chamber 10 for generating a level signal, the first valve 23 being an electrically controllable valve, and a control unit 40 responsive to the level signal for controlling the first valve 23.
  • the first valve 23 installed in the first drain pipe 21 is closed, in which state the fluid pump 30 is operated to supply the cleaning fluid into the scrubbing chamber 10.
  • the control unit 40 controls the fluid pump 30 in such a way that the fluid within the scrubbing chamber 10 is kept at a level suitable for the cleansing operation. It may well be possible to additionally install a control valve in the overflow pipe 5, the control valve being controlled by the control unit 40.
  • the control unit 40 controls the first valve 23 in response to the level signal supplied from the level sensor 41 so that the fluid level within the scrubbing chamber 10 can be kept generally equal to the bottom end of the eliminator 11. This means that the fluid is always filled up to the bottom end of the eliminator 11, thereby preventing the exhaust gas from flowing through the space otherwise formed below the eliminator 11. As a result, it is possible to prevent the dust and the water from being discharged to the outside together with the exhaust gas.
  • the wet type scrubber of the present invention allows a scrubbing chamber to be changed to a purging tank during a cleansing operation so that the interior of the scrubber including an eliminator can be easily cleansed without having to take out the eliminator from the scrubbing chamber.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)
  • Separation Of Particles Using Liquids (AREA)

Abstract

L'invention porte sur un épurateur-laveur de type par voie humide, facilement nettoyable, pour un gaz d'échappement, qui comprend une chambre de lavage ayant un orifice d'entrée, un orifice de sortie et un trou de drainage formé dans une paroi inférieure de la chambre de lavage. Un éliminateur est disposé à l'intérieur de la chambre de lavage pour diviser l'intérieur de la chambre de lavage en un espace d'entrée et un espace de sortie, l'éliminateur ayant une pluralité de lames espacées. L'épurateur-laveur comprend en outre un réservoir de fluide pour stocker du fluide, un premier tuyau de drainage ayant une première extrémité reliée au trou de drainage et une seconde extrémité reliée au réservoir de fluide, une première soupape installée dans le premier tuyau de drainage pour avec possibilité d'ouverture le tuyau de drainage, une buse de pulvérisation disposée à l'intérieur de la chambre de drainage pour pulvériser le fluide dans l'espace d'entrée de la chambre de lavage, et une pompe à fluide pour adresser le fluide à la buse de pulvérisation.
PCT/KR2007/006262 2007-07-23 2007-12-05 Epurateur-laveur de type par voie humide pour un gaz d'échappement capable de nettoyer facilement un éliminateur Ceased WO2009014285A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0073397 2007-07-23
KR1020070073397A KR100919817B1 (ko) 2007-07-23 2007-07-23 엘리미네이터를 용이하게 청소할 수 있는 배출가스습식정화장치

Publications (1)

Publication Number Publication Date
WO2009014285A1 true WO2009014285A1 (fr) 2009-01-29

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PCT/KR2007/006262 Ceased WO2009014285A1 (fr) 2007-07-23 2007-12-05 Epurateur-laveur de type par voie humide pour un gaz d'échappement capable de nettoyer facilement un éliminateur

Country Status (2)

Country Link
KR (1) KR100919817B1 (fr)
WO (1) WO2009014285A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013014421A3 (fr) * 2011-07-22 2013-03-21 Edwards Limited Laveurs de gaz à pression sous-atmosphérique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160046366A (ko) 2014-10-20 2016-04-29 정인환 열기 및 스팀 혼합 가열식 구이용 불판

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003726A (en) * 1975-12-10 1977-01-18 Scott Paper Company Cleaning of particulate or mist eliminating apparatus with SO2
US4099938A (en) * 1977-02-17 1978-07-11 American Air Filter Company, Inc. Mist eliminator cleaning device
US5582807A (en) * 1994-11-04 1996-12-10 Tek-Kol Method and apparatus for removing particulate and gaseous pollutants from a gas stream
EP1485184B1 (fr) * 2002-03-26 2006-01-18 Munters Euroform GmbH Dispositif de lavage pour separateurs de gouttes
WO2006080636A1 (fr) * 2004-11-17 2006-08-03 In Seob Lee Procede hybride et dispositif destines au traitement des gaz de combustion

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3030282B2 (ja) * 1998-08-03 2000-04-10 野村マイクロ・サイエンス株式会社 空気清浄化システム
KR100530770B1 (ko) * 2003-03-26 2005-11-28 (주)대성공영환경 습식 미스트 엘리미네이터가 부착된 건식 공기정화장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003726A (en) * 1975-12-10 1977-01-18 Scott Paper Company Cleaning of particulate or mist eliminating apparatus with SO2
US4099938A (en) * 1977-02-17 1978-07-11 American Air Filter Company, Inc. Mist eliminator cleaning device
US5582807A (en) * 1994-11-04 1996-12-10 Tek-Kol Method and apparatus for removing particulate and gaseous pollutants from a gas stream
EP1485184B1 (fr) * 2002-03-26 2006-01-18 Munters Euroform GmbH Dispositif de lavage pour separateurs de gouttes
WO2006080636A1 (fr) * 2004-11-17 2006-08-03 In Seob Lee Procede hybride et dispositif destines au traitement des gaz de combustion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013014421A3 (fr) * 2011-07-22 2013-03-21 Edwards Limited Laveurs de gaz à pression sous-atmosphérique
US9446341B2 (en) 2011-07-22 2016-09-20 Edwards Limited Sub-atmospheric pressure gas scrubbers

Also Published As

Publication number Publication date
KR100919817B1 (ko) 2009-10-01
KR20090010353A (ko) 2009-01-30

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