WO2023007973A1 - Appareil de traitement de gaz d'échappement - Google Patents

Appareil de traitement de gaz d'échappement Download PDF

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Publication number
WO2023007973A1
WO2023007973A1 PCT/JP2022/023886 JP2022023886W WO2023007973A1 WO 2023007973 A1 WO2023007973 A1 WO 2023007973A1 JP 2022023886 W JP2022023886 W JP 2022023886W WO 2023007973 A1 WO2023007973 A1 WO 2023007973A1
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Prior art keywords
exhaust gas
gas treatment
heat exchanger
treatment apparatus
air
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PCT/JP2022/023886
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English (en)
Japanese (ja)
Inventor
俊大 福田
弘貢 長安
卓也 岡本
直行 神山
浩一郎 岩下
Original Assignee
三菱重工業株式会社
三菱パワー株式会社
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Publication of WO2023007973A1 publication Critical patent/WO2023007973A1/fr

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    • 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
    • B01D53/14—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 by absorption
    • 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
    • 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
    • B01D53/75—Multi-step processes
    • 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
    • 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
    • B01D53/81—Solid phase processes
    • B01D53/83—Solid phase processes with moving reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/16—Plant or installations having external electricity supply wet type

Definitions

  • the present disclosure relates to an exhaust gas treatment device.
  • This application claims priority based on Japanese Patent Application No. 2021-125324 filed with the Japan Patent Office on July 30, 2021, the contents of which are incorporated herein.
  • Sulfur trioxide (SO 3 ) is contained in exhaust gas generated by burning fossil fuels such as petroleum and coal. If the temperature of the flue gas containing SO3 is above the dew point of SO3 , SO3 exists as SO3 gas in the flue gas. SO3 must be removed from the flue gas.
  • a wet-type electrostatic precipitator is installed downstream of a wet-type desulfurization device, and an exhaust gas treatment device that removes sulfuric acid present in the form of mist in the exhaust gas. is sometimes used.
  • the wet type electrostatic precipitator for treating exhaust gas containing high concentrations of SO 3 is associated with an increase in equipment size and a large amount of alkaline chemical (caustic soda) consumption, resulting in increased costs and poor economic efficiency.
  • Patent Document 2 discloses an exhaust gas flow on the exhaust gas inlet side of a heat exchanger that is arranged across the exhaust gas flow paths on the upstream side and the downstream side of the wet desulfurization apparatus.
  • An exhaust gas treatment device is described in which the flue gas is sprayed with a powdered alkaline absorbent to reduce the SO 3 concentration in the exhaust gas.
  • a large amount of powdered alkaline absorbent must be sprayed into the flue gas, and it is difficult to remove the high concentration powder contained in the flue gas before it is released into the atmosphere.
  • the exhaust gas treatment apparatuses described in Patent Documents 1 and 2 can remove SO3 from exhaust gas, but in order to treat exhaust gas containing high concentrations of SO3 , a large amount of chemicals and high-performance Since additional equipment is required, there is a disadvantage that the cost increases and economic efficiency is poor.
  • At least one embodiment of the present disclosure aims to provide an exhaust gas treatment apparatus that suppresses cost increases and has economic superiority.
  • an exhaust gas treatment apparatus for treating exhaust gas discharged from a combustion device, comprising: a charging device for charging a powdery alkaline absorbent into the exhaust gas; A wet desulfurization device that desulfurizes the exhaust gas by contacting the exhaust gas containing an alkali absorbent with an absorbent, and heats the exhaust gas before being desulfurized in the wet desulfurization device and the air supplied to the combustion device. and a heat exchanger for exchanging.
  • the air heated by exchanging heat with the exhaust gas before being desulfurized in the wet desulfurization apparatus is supplied to the combustion apparatus, thereby improving the operation efficiency of the combustion apparatus.
  • the operating efficiency of the entire plant, including the equipment and exhaust gas treatment equipment, is improved. This improvement in operating efficiency suppresses the increase in costs due to the installation of an exhaust gas treatment apparatus containing high concentrations of SO 3 , and enables exhaust gas treatment with improved economic efficiency of the entire plant.
  • FIG. 1 is a configuration schematic diagram of a plant including an exhaust gas treatment apparatus according to Embodiment 1 of the present disclosure
  • FIG. 1 is a configuration schematic diagram of a wet electrostatic precipitator provided in an exhaust gas treatment apparatus according to Embodiment 1 of the present disclosure
  • FIG. 2 is a schematic diagram of the configuration of a plant including an exhaust gas treatment apparatus according to Embodiment 2 of the present disclosure
  • the plant 1 includes a boiler 2 that is a combustion device, an exhaust gas treatment device 3 according to Embodiment 1 of the present disclosure, and a chimney 4.
  • the exhaust gas treatment device 3 discharges from the boiler 2 It is intended to treat the exhaust gas that is produced.
  • the flue gas treatment device 3 includes a charging device 11 for charging a powdered alkali absorbent, such as powdered calcium carbonate, into a flue 5 through which the flue gas flows, and bringing the flue gas containing the alkali absorbent into contact with the absorbent.
  • the configuration of the injection device 11 is not limited, for example, it is possible to use a device that injects a powdered alkali absorbent into the flue 5 together with compressed air.
  • an air line 18 through which air supplied to the boiler 2 flows is provided.
  • the air line 18 has one end connected to the boiler 2 , the other end provided with a blower 19 , and configured to pass through the heat exchanger 13 .
  • the exhaust gas treatment device 3 is not an essential component, but includes a denitrification device 14 for denitrifying the exhaust gas, a heat exchanger 15 for exchanging heat between the exhaust gas flowing out of the denitrification device 14 and the air supplied to the boiler 2, and wet desulfurization.
  • a dry dust remover 16 e.g., a dry electrostatic precipitator or bag filter
  • the dust remover 17 can use either a dry dust remover or a wet dust remover.
  • dry dust remover 17 for example, a bag filter can be used, and as the wet dust remover 17, for example, a wet electrostatic precipitator can be used. If heat exchanger 15 is provided, air line 18 is arranged to pass through heat exchanger 15 as well as heat exchanger 13 .
  • FIG. 2 shows an example of the configuration when the dust remover 17 is a wet-type electrostatic precipitator. Even if the dust remover 17 is a wet electrostatic precipitator, it is not limited to the wet electrostatic precipitator having the structure shown in FIG. 2, and the structure shown in FIG. 2 is merely an example of the wet electrostatic precipitator.
  • the dust remover 17 includes a housing 21 communicating with the flue 5. Inside the housing 21, one or a plurality of electrodes 22 and a cleaning liquid containing an alkaline chemical (for example, caustic soda) for adjusting pH are contained. and a circulation line 24 for circulating the cleaning liquid so as to return the cleaning liquid sprayed onto the electrode 22 to the nozzles 23 again. A pump 25 or the like is provided in the circulation line 24 to circulate the cleaning liquid.
  • an alkaline chemical for example, caustic soda
  • the circulation line 24 may be provided with a branch line 26 that communicates between two different positions P 1 and P 2 of the circulation line 24 , and the branch line 26 may be provided with a separator 27 .
  • the separation device 27 is for separating solid substances contained in the cleaning liquid from the cleaning liquid, and may be, for example, a filter for filtering solid substances having a particle size larger than an arbitrary size.
  • a buffer tank 28 is provided to hold the slurry containing the solid matter separated by the separation device 27, and the slurry is supplied to the wet desulfurization device 12 via a line 29 connecting the buffer tank 28 and the wet desulfurization device 12. may be configured.
  • the buffer tank 28 is provided with an agitator for agitating the slurry to be retained so as not to deposit solid matter.
  • the flue gas treatment device 3 when powdered calcium carbonate is fed from the feeding device 11 into the flue 5 as an alkali absorbent, the powdered calcium carbonate is mixed with the flue gas flowing through the flue 5 .
  • the exhaust gas containing powdered calcium carbonate is pressurized by the blower 19 and is cooled by exchanging heat with the air flowing through the air line 18. If the temperature of the exhaust gas is higher than the dew point of SO3 , SO3 exists as a gas in the exhaust gas , but when the exhaust gas is cooled to below the dew point of SO3 , SO3 condenses. As SO 3 condenses, SO 3 is incorporated into calcium carbonate. That is, SO 3 is removed from the exhaust gas.
  • the air heated by exchanging heat with the exhaust gas in the heat exchanger 13 is supplied to the boiler 2 .
  • the exhaust gas treatment device 3 is provided with the heat exchanger 15 , the air is further heated by exchanging heat with the exhaust gas in the heat exchanger 15 and supplied to the boiler 2 .
  • the air heated in the heat exchangers 13 and 15 in the heat exchanger 13 is supplied to the boiler 2, so that the operation efficiency of the boiler 2 is improved, so that the operation efficiency of the plant 1 as a whole is improved.
  • the exhaust gas cooled in the heat exchanger 13 flows into the wet desulfurization device 12 .
  • the exhaust gas is brought into gas-liquid contact with an absorption liquid (for example, an aqueous solution of calcium carbonate), whereby sulfur dioxide (SO 2 ) gas and SO 3 gas in the exhaust gas are removed (desulfurized).
  • an absorption liquid for example, an aqueous solution of calcium carbonate
  • SO 2 sulfur dioxide
  • SO 3 gas in the exhaust gas are removed (desulfurized).
  • the powdery calcium carbonate contained in the exhaust gas is also removed from the exhaust gas by being mostly taken into the absorbing liquid. If the exhaust gas treatment device 3 does not have the dust removal device 17, the exhaust gas that has flowed out of the wet desulfurization device 12 is released into the atmosphere through the chimney 4.
  • the cleaning liquid flowing through the circulation line 24 is sprayed from the nozzle 23 onto the electrode 22, so that the solid matter adhering to the electrode 22 is washed away from the electrode 22 and incorporated into the cleaning liquid.
  • the cleaning liquid flows out from the housing 21 and circulates through the circulation line 24 .
  • the cleaning liquid is again supplied to the nozzle 23 by the pump 25 and sprayed onto the electrode 22 .
  • the circulation line 24 When the circulation line 24 is provided with the branch line 26 and the separation device 27, part of the cleaning liquid flowing through the circulation line 24 flows through the branch line 26 and flows into the separation device 27 during the cleaning operation.
  • the washing liquid In the separation device 27, the washing liquid is separated into a slurry containing a high concentration of solid matter and a slurry containing a low concentration of solid matter. If the solid matter concentration in the cleaning liquid is high, the nozzle 23 and the circulation line 24 may be clogged. However, if the separation device 27 is provided, the solid substances in the cleaning liquid are removed by the separation device 27 and the solid substance concentration is lowered, so that the possibility of clogging the nozzle 23 or the circulation line 24 can be reduced.
  • the slurry containing low-concentration solid substances separated by the separation device 27 is reused as a cleaning liquid that flows through the circulation line 24 .
  • the slurry containing the high-concentration solid matter separated by the separation device 27 contains a large amount of calcium carbonate contained in the absorbent used in the wet desulfurization device 12, it passes through the line 29 to the wet desulfurization device. 12, it can be reused as part of the absorption liquid.
  • the washing liquid circulated by the washing operation exhibits acidity, which may cause corrosion of the equipment. be.
  • caustic soda as an alkaline chemical into the circulating liquid tank 41 to adjust the pH.
  • the powdery calcium carbonate contained in the exhaust gas that has escaped from the wet desulfurization device 12 is removed by the downstream dust removal device 17 and dissolved in the circulating water, so that the pH can be prevented from decreasing without adding caustic soda. , the consumption of alkali chemicals (for example, caustic soda) can be reduced, and the cost increase can be further suppressed.
  • the air heated by exchanging heat with the exhaust gas before being desulfurized in the wet desulfurization apparatus 12 is supplied to the boiler 2, whereby the boiler 2 , the operating efficiency of the entire plant 1 including the boiler 2 and the exhaust gas treatment device 3 is improved.
  • This improvement in operating efficiency suppresses an increase in costs due to the installation of an exhaust gas treatment apparatus containing high concentrations of SO 3 , and enables exhaust gas treatment with improved economic efficiency of the entire plant.
  • Embodiment 2 Next, an exhaust gas treatment apparatus according to Embodiment 2 will be described.
  • the air flowing into the boiler 2 and the exhaust gas flowing into the exhaust gas treatment device 3 are heat-exchanged. need to implement. Therefore, in the exhaust gas treatment apparatus according to the second embodiment, air heating operation control in the heat exchanger 13 is added to the first embodiment.
  • the same reference numerals are given to the same components as those of the first embodiment, and detailed description thereof will be omitted.
  • the air line 18 is provided with a bypass line 31 that bypasses the heat exchanger 13, and the bypass line 31 is provided with a bypass line 31
  • An adjusting device 32 eg, a flow rate adjusting damper
  • a temperature sensor 33 first temperature detection device that detects the temperature of the exhaust gas that has flowed out of the heat exchanger 13 is provided in the flue 5, and the adjustment device 32 is controlled based on the value detected by the temperature sensor 33 (for example, a flow rate adjustment damper may be controlled).
  • the temperature sensor 33 detects the temperature of the exhaust gas flowing into the heat exchanger 13.
  • the temperature measurement value or the temperature measurement value of the air flowing out of the heat exchanger 13 may be used to control the adjustment device 32 .
  • FIG. 3 shows a steam air heater 34a as an example of the heating device 34.
  • a steam supply line 35 for supplying steam to the steam air heater 34a is connected to the steam air heater 34a.
  • the steam supply line 35 is provided with a steam supply amount adjustment valve 36 for adjusting the flow rate of steam flowing through the steam supply line 35 .
  • a temperature sensor 37 (second temperature detection device) for detecting the temperature of the exhaust gas flowing out of the heat exchanger 15 is provided in the flue 5, and the opening degree of the steam supply amount adjustment valve 36 is determined based on the value detected by the temperature sensor 37. may be controlled.
  • the temperature sensor 37 detects the temperature of the exhaust gas flowing into the heat exchanger 15.
  • the opening degree of the steam supply amount adjustment valve 36 may be controlled using the temperature measurement value, the temperature measurement value of the exhaust gas flowing out of the dust remover 16, or the temperature measurement value of the air flowing out of the heat exchanger 15. Other configurations are the same as those of the first embodiment.
  • Embodiment 1 since the air heated by the heat exchanger 13 is supplied to the boiler 2, the operation efficiency of the boiler 2 is improved. , there is a suitable temperature of the air depending on the operating conditions of the boiler 2 . On the other hand, if the air is heated more than necessary in the heat exchanger 13, the exhaust gas will be cooled too much. If the temperature of is too low, the exhaust gas flowing out of the heat exchanger 15 will be cooled too much, and it cannot be denied that the operation of the exhaust gas treatment apparatus after the heat exchanger 15 will be adversely affected. Furthermore, under conditions where the atmospheric temperature fluctuates greatly, it is necessary to control the influence of the temperature change of the air sucked by the blower 19 on the heat exchanger 15 .
  • the flow rate of the air supplied to the heat exchanger 13 can be reduced.
  • the flow rate of the air flowing through the bypass line 31 can be adjusted by the adjusting device 32 , in other words, the adjusting device 32 can adjust the flow rate of the air supplied to the heat exchanger 13 . Since the amount of air supplied to the heat exchanger 13 can be adjusted in this way, the temperature of the air supplied to the boiler 2 can be adjusted. be able to.
  • the exhaust gas temperature suitable for the operation of the exhaust gas treatment apparatus after the heat exchanger 15 can be maintained.
  • the adjustment device 32 is controlled based on the value detected by the temperature sensor 33, and the air supplied to the heat exchanger 13 can be adjusted.
  • the amount of air supplied to the heat exchanger 13 can be adjusted based on the temperature of the exhaust gas heat-exchanged with the air in the heat exchanger 13, so the temperature of the air supplied to the boiler 2 can be adjusted. Therefore, the accuracy of air temperature adjustment is improved, and air more suitable for the operating state of the boiler 2 can be supplied to the boiler 2 .
  • the heat exchanger 15 when the heat exchanger 15 is installed, the exhaust gas temperature suitable for the operation of the exhaust gas treatment apparatus after the heat exchanger 15 can be maintained.
  • the temperature of the air can be adjusted according to the operating conditions of the boiler 2.
  • the air flowing through the bypass line 31 is heated by the heating device 34 to adjust the temperature of the air supplied to the boiler 2 to an appropriate temperature according to the operating conditions of the boiler 2. can do.
  • the heating device 34 is a steam air heater 34a
  • the temperature of the air supplied to the boiler 2 is adjusted by controlling the opening degree of the steam supply amount adjustment valve 36 to adjust the flow rate of the steam supplied to the steam air heater 34a. Adjustments can be made.
  • the exhaust gas temperature suitable for the operation of the exhaust gas treatment apparatus after the heat exchanger 15 can be maintained.
  • heating is performed by controlling the opening of the steam supply amount adjustment valve 36 based on the value detected by the temperature sensor 37.
  • Device 34 can regulate the heating of the air. Thereby, the temperature of the air supplied to the boiler 2 can be controlled more appropriately.
  • the heat exchanger 15 is installed, the exhaust gas temperature suitable for the operation of the exhaust gas treatment apparatus after the heat exchanger 15 can be maintained.
  • An exhaust gas treatment device includes: An exhaust gas treatment device (3) for treating exhaust gas discharged from a combustion device (boiler 2), A charging device (11) for charging a powdery alkali absorbent into the exhaust gas; a wet desulfurization device (12) for desulfurizing the exhaust gas by bringing the exhaust gas containing the alkali absorbent into contact with an absorbent; A heat exchanger (13) is provided for exchanging heat between the exhaust gas before being desulfurized in the wet desulfurization device (12) and the air supplied to the combustion device (2).
  • the air heated by exchanging heat with the exhaust gas before being desulfurized in the wet desulfurization apparatus is supplied to the combustion apparatus, thereby improving the operation efficiency of the combustion apparatus.
  • the operating efficiency of the entire plant, including the equipment and exhaust gas treatment equipment, is improved. This improvement in operating efficiency suppresses an increase in costs due to the installation of the exhaust gas treatment apparatus, thereby enabling exhaust gas treatment with improved economic efficiency of the entire plant.
  • An exhaust gas treatment device is the exhaust gas treatment device of [1], a bypass line (31) through which at least part of the air supplied to the heat exchanger (13) bypasses the heat exchanger (13); and an adjusting device (32) for adjusting the flow rate of the air flowing through the bypass line (31).
  • An exhaust gas treatment device is the exhaust gas treatment device of [2], A first temperature detection device (temperature sensor 33) that detects the temperature of the exhaust gas heat-exchanged with the air in the heat exchanger (13), Based on the value detected by the first temperature detection device (33), the adjustment device (32) adjusts the flow rate of the air flowing through the bypass line (31).
  • the amount of air supplied to the heat exchanger can be adjusted based on the temperature of the exhaust gas that has undergone heat exchange with the air in the heat exchanger. can be adjusted, the accuracy of air temperature adjustment is improved, and air more suitable for the operating conditions of the combustion device can be supplied to the combustion device.
  • An exhaust gas treatment device is the exhaust gas treatment device of either [2] or [3], A heating device (34) is provided for heating the air flowing through the bypass line (31).
  • An exhaust gas treatment device is the exhaust gas treatment device of [4], A second temperature detection device (temperature sensor 37) that detects the temperature of the exhaust gas discharged from the combustion device (2), Based on the value detected by the second temperature detection device (37), the heating device (34) adjusts the heating of the air.
  • An exhaust gas treatment device is the exhaust gas treatment device according to any one of [1] to [5], In the heat exchanger, the exhaust gas containing the alkali absorbent is cooled to a temperature below the dew point of SO3.
  • An exhaust gas treatment device is the exhaust gas treatment device according to any one of [1] to [6], A dust remover (17) for removing solid substances from the exhaust gas desulfurized in the wet desulfurization device (12) is provided.
  • An exhaust gas treatment device is the exhaust gas treatment device of [7],
  • the dust remover (17) is a wet electrostatic precipitator,
  • the wet electrostatic precipitator is an electrode (22) for collecting the solid matter; a nozzle (23) for spraying a cleaning liquid onto the electrode (22); a circulation line (24) for circulating the cleaning liquid so as to return the cleaning liquid sprayed on the electrode (22) to the nozzle (23),
  • Said circulation line (24) comprises a branch line (26) communicating between two different positions (P 1 , P 2 ) of said circulation line (24).
  • a separation device (27) is provided for separating the contained solid matter from the washing liquid.
  • the dust remover is a wet-type electrostatic precipitator, if the concentration of solid substances in the cleaning liquid is high, the cleaning liquid circulation line may be clogged.
  • the concentration of solid substances in the cleaning liquid is high, the cleaning liquid circulation line may be clogged.
  • An exhaust gas treatment device is the exhaust gas treatment device of [8], a buffer tank (28) for retaining the slurry containing the solid matter separated by the separation device (27); A line (29) communicating between the buffer tank (28) and the wet desulfurization device (12), The slurry in the buffer tank (28) is supplied to the wet desulfurization unit (12) as the absorbent through the line (29).
  • the amount of alkali absorbent used in the wet desulfurization device can be saved, so the operating cost of the exhaust gas treatment device can be reduced.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)
  • Electrostatic Separation (AREA)

Abstract

La présente invention concerne un appareil de traitement de gaz d'échappement, qui traite des gaz d'échappement évacués d'un dispositif de combustion, comprenant : un dispositif de charge qui charge un absorbant alcalin en poudre dans les gaz d'échappement ; un dispositif de désulfuration par voie humide qui désulfure les gaz d'échappement en mettant en contact les gaz d'échappement comprenant l'absorbant alcalin avec un liquide absorbant ; et un échangeur de chaleur qui échange de la chaleur entre les gaz d'échappement avant la désulfuration dans le dispositif de désulfuration par voie humide et l'air fourni au dispositif de combustion.
PCT/JP2022/023886 2021-07-30 2022-06-15 Appareil de traitement de gaz d'échappement WO2023007973A1 (fr)

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JP2021125324A JP2023020129A (ja) 2021-07-30 2021-07-30 排ガス処理装置
JP2021-125324 2021-07-30

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04110020A (ja) * 1990-08-30 1992-04-10 Babcock Hitachi Kk 排ガス浄化方法
JPH07204433A (ja) * 1994-01-25 1995-08-08 Babcock Hitachi Kk 排ガスの浄化処理方法およびその装置
JPH11216387A (ja) * 1998-01-30 1999-08-10 Seikow Chemical Engineering & Machinery Ltd 粉塵含有排ガスの処理方法
JP2010158604A (ja) * 2009-01-06 2010-07-22 Mitsubishi Heavy Industries Mechatronics Systems Ltd 電気集塵機の洗浄方法およびその装置
CN103041703A (zh) * 2012-12-27 2013-04-17 浙江信耳科技有限公司 用于燃烧褐煤的scr烟气脱硝系统
WO2013089035A1 (fr) * 2011-12-12 2013-06-20 日本リファイン株式会社 Dispositif de contact gaz/liquide, dispositif de distillation et dispositif d'échange de chaleur
WO2014014090A1 (fr) * 2012-07-20 2014-01-23 三菱重工メカトロシステムズ株式会社 Dispositif de dépoussiérage électrique de type humide et procédé de dépoussiérage
JP2015230149A (ja) * 2014-06-06 2015-12-21 三菱日立パワーシステムズ株式会社 ボイラシステムおよびそれを備えた発電プラント

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04110020A (ja) * 1990-08-30 1992-04-10 Babcock Hitachi Kk 排ガス浄化方法
JPH07204433A (ja) * 1994-01-25 1995-08-08 Babcock Hitachi Kk 排ガスの浄化処理方法およびその装置
JPH11216387A (ja) * 1998-01-30 1999-08-10 Seikow Chemical Engineering & Machinery Ltd 粉塵含有排ガスの処理方法
JP2010158604A (ja) * 2009-01-06 2010-07-22 Mitsubishi Heavy Industries Mechatronics Systems Ltd 電気集塵機の洗浄方法およびその装置
WO2013089035A1 (fr) * 2011-12-12 2013-06-20 日本リファイン株式会社 Dispositif de contact gaz/liquide, dispositif de distillation et dispositif d'échange de chaleur
WO2014014090A1 (fr) * 2012-07-20 2014-01-23 三菱重工メカトロシステムズ株式会社 Dispositif de dépoussiérage électrique de type humide et procédé de dépoussiérage
CN103041703A (zh) * 2012-12-27 2013-04-17 浙江信耳科技有限公司 用于燃烧褐煤的scr烟气脱硝系统
JP2015230149A (ja) * 2014-06-06 2015-12-21 三菱日立パワーシステムズ株式会社 ボイラシステムおよびそれを備えた発電プラント

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