GB1385719A - Process and apparatus for purifying exhaust gas - Google Patents

Process and apparatus for purifying exhaust gas

Info

Publication number
GB1385719A
GB1385719A GB3521972A GB3521972A GB1385719A GB 1385719 A GB1385719 A GB 1385719A GB 3521972 A GB3521972 A GB 3521972A GB 3521972 A GB3521972 A GB 3521972A GB 1385719 A GB1385719 A GB 1385719A
Authority
GB
United Kingdom
Prior art keywords
exhaust gas
substance
caustic soda
absorption solution
recovered
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.)
Expired
Application number
GB3521972A
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1385719A publication Critical patent/GB1385719A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)
  • Chimneys And Flues (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

1385719 Purification of exhaust gases HITACHI Ltd 27 July 1972 [6 Aug 1971] 35219/72 Heading ClA Exhaust gas containing a noxious substance such as SO 2 or NO 2 is reacted with an absorption solution to absorb the noxious substance, converting the noxious substance into an innocuous substance, and bringing at least part of the resultant mixture into direct contact with the entering exhaust gas stream in order to cool the exhaust gas and form a solid substance from the mixture. The absorption solution may be aqueous sodium sulphite possibly containing caustic soda which has been recovered after reaction of caustic soda with SO 2 . In the drying tower the heat of the flue gas evaporates water from the solution leaving a fine powdery Na 2 SO 3 product which may be recovered. The cooled gas is passed to an absorbing tower where it is contacted with an absorption solution containing NaOH or Na 2 SO 3 . The spent absorbent may be circulated to the drying tower or caustic soda may be added to it to convert any NaHSO 3 present into Na 2 SO 3 . Nitrogen oxides present in the waste gas may be converted by NaOH into sodium nitrate or by Na 2 SO 3 into sodium sulphate. Alternatively part of the spent absorbent may be reacted with slaked lime or CaO (as powder or slurry) to form calcium sulphate or calcium sulphite.
GB3521972A 1971-08-06 1972-07-27 Process and apparatus for purifying exhaust gas Expired GB1385719A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46059048A JPS4949288B2 (en) 1971-08-06 1971-08-06

Publications (1)

Publication Number Publication Date
GB1385719A true GB1385719A (en) 1975-02-26

Family

ID=13102026

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3521972A Expired GB1385719A (en) 1971-08-06 1972-07-27 Process and apparatus for purifying exhaust gas

Country Status (3)

Country Link
JP (1) JPS4949288B2 (en)
DE (1) DE2238801A1 (en)
GB (1) GB1385719A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102642851A (en) * 2012-05-08 2012-08-22 中国石油化工股份有限公司 Production method of high-purity sodium bisulfite solution
CN111439759A (en) * 2020-05-23 2020-07-24 淄博长城化工厂 Method for producing food-grade potassium sulfite by adopting potassium metabisulfite mother liquor
CN113117476A (en) * 2019-12-30 2021-07-16 中晶新材料有限公司 Integrated process for flue gas desulfurization and denitrification and cementing material preparation
CN115337896A (en) * 2022-07-22 2022-11-15 西南化工研究设计院有限公司 Dry desulfurizing agent for ultralow emission of sulfonated tail gas and preparation method thereof

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4936573A (en) * 1972-08-09 1974-04-04
JPS5065052A (en) * 1973-10-16 1975-06-02
DE2408222B2 (en) * 1974-02-21 1977-12-08 Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen KG, 4300 Essen PLANT FOR PURIFYING GASES FROM INDUSTRIAL FURNACES FOR THE TREATMENT OF NON-FERROUS METAL MELT
JPS50111332U (en) * 1974-02-22 1975-09-11
DE2431130C3 (en) * 1974-06-28 1979-07-26 Maschinenfabrik Burkau R. Wolf Kg, 4048 Grevenbroich Process for removing acidic components from exhaust gases
JPS5223567A (en) * 1975-08-18 1977-02-22 Hitachi Zosen Corp Process for treatment of exhaust gases evolved in incineration furnace s, etc.
JPS5232896A (en) * 1975-09-10 1977-03-12 Mitsubishi Heavy Ind Ltd Improved wet recovery process of sulfur in the waste gas as gypsum wit h lime
JPS52124470A (en) * 1976-04-13 1977-10-19 Fuji Sekiyu Kk Removal of acidic gas
JPS5319970A (en) * 1976-08-10 1978-02-23 Mitsubishi Heavy Ind Ltd Treating method of exhaust gas
DE2645026A1 (en) * 1976-10-06 1978-04-13 Steag Ag PROCESS AND SYSTEM FOR PROCESSING SMOKE GASES, E. THE SMOKE GASES FROM POWER PLANTS, FIRED WITH FOSSIL FUELS, IN PARTICULAR WITH TON COAL
JPS5624523Y2 (en) * 1977-10-17 1981-06-09
JPS5466380A (en) * 1977-11-07 1979-05-28 Hitachi Plant Eng & Constr Co Ltd Treating apparatus for exhaust gas containing hydrogen chloride
CH633726A5 (en) * 1977-11-17 1982-12-31 Ciba Geigy Ag METHOD FOR REMOVING ACID POLLUTANTS AND HOVING SUBSTANCES FROM EXHAUST GASES FROM INDUSTRIAL OVENS, ESPECIALLY FROM WASTE COMBUSTION PLANTS, AND SLUDGE SEPARATORS FOR THE EXECUTION THEREOF.
DE2846457C2 (en) * 1978-10-23 1986-09-25 Leisegang Umwelttechnik KG, 1000 Berlin Process and system for furnace gas dedusting and harmful gas absorption for a hot blast cupola furnace
JPS55131613A (en) * 1979-03-31 1980-10-13 Miura Co Ltd Method and apparatus for incineration of waste tire and waste seat
DE2913329C2 (en) * 1979-04-03 1984-11-22 Dechema Deutsche Gesellschaft F. Chem. Apparatewesen E.V., 6000 Frankfurt Process for the separation of traces of gaseous pollutants based on sulfur from exhaust gases by chemical absorption
US4366133A (en) * 1981-06-01 1982-12-28 Combustion Engineering, Inc. Process for limiting chloride buildup in SO2 scrubber slurry
AT393094B (en) * 1989-04-14 1991-08-12 Krassnigg Franz Process and apparatus for cleaning hot waste gases, especially flue gases
JP5117527B2 (en) * 2010-03-26 2013-01-16 パンパシフィック・カッパー株式会社 Exhaust gas treatment equipment in non-ferrous smelting equipment, and exhaust gas treatment method in non-ferrous smelting equipment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102642851A (en) * 2012-05-08 2012-08-22 中国石油化工股份有限公司 Production method of high-purity sodium bisulfite solution
CN102642851B (en) * 2012-05-08 2014-10-01 中国石油化工股份有限公司 Production method of high-purity sodium bisulfite solution
CN113117476A (en) * 2019-12-30 2021-07-16 中晶新材料有限公司 Integrated process for flue gas desulfurization and denitrification and cementing material preparation
CN111439759A (en) * 2020-05-23 2020-07-24 淄博长城化工厂 Method for producing food-grade potassium sulfite by adopting potassium metabisulfite mother liquor
CN115337896A (en) * 2022-07-22 2022-11-15 西南化工研究设计院有限公司 Dry desulfurizing agent for ultralow emission of sulfonated tail gas and preparation method thereof
CN115337896B (en) * 2022-07-22 2023-12-01 西南化工研究设计院有限公司 Dry desulfurizing agent for ultralow emission of sulfonated tail gas and preparation method thereof

Also Published As

Publication number Publication date
JPS4949288B2 (en) 1974-12-26
JPS4825674A (en) 1973-04-03
DE2238801A1 (en) 1973-03-15

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee