JPS5472799A - Removing method for nitrogen oxides and sulfur dioxide in exhaust gas - Google Patents

Removing method for nitrogen oxides and sulfur dioxide in exhaust gas

Info

Publication number
JPS5472799A
JPS5472799A JP13941277A JP13941277A JPS5472799A JP S5472799 A JPS5472799 A JP S5472799A JP 13941277 A JP13941277 A JP 13941277A JP 13941277 A JP13941277 A JP 13941277A JP S5472799 A JPS5472799 A JP S5472799A
Authority
JP
Japan
Prior art keywords
contg
soln
reformer
fed
crystals
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.)
Pending
Application number
JP13941277A
Other languages
Japanese (ja)
Inventor
Takemune Kitamura
Hitoshi Takagi
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.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry 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 Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP13941277A priority Critical patent/JPS5472799A/en
Priority to US05/927,249 priority patent/US4186176A/en
Priority to DE2833440A priority patent/DE2833440C2/en
Publication of JPS5472799A publication Critical patent/JPS5472799A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2

Landscapes

  • Treating Waste Gases (AREA)

Abstract

PURPOSE: To recover useful alkali carbonate and H2S by adding a carnon substance to by-product crystals of alkali dithionate, etc, contained in a NOx and SO2 absrobing soln. to thermally reduce the crystals, and allowing CO2 to be absorbed into the resulting aq. soln. of alkali sulfide.
CONSTITUTION: Exhaust gas 1 is brought into contact with absorbing soln. 3 contg. an iron-EDTA complex and Na2SO3 in absorption tower 2 to remove NOx and SO2 by absorption. Next part of the soln. to be recycled is fed to crystallization vessel 6 through circulation tank 5 and passed through separator 7 to separate crystals contg. Na2S2O6. 2H2O and sodium sulfate. The crystals are fed to reduction furnace 18 through drier 9, mixed with coal powder, etc., and reduced at above 700°C to form a mixed melt contg. Na2S, which is then supplied to first reformer 28 through cooling and dissolving vessel 22. In reformer 28, CO2-contg. gas 14 is blown to adjust the soln. to pH 9W10. The sonl. is fed to second reformer 31 to be adjusted to pH 8W9, and S is recovered from H2S- contg. gas 33 formed. On the other hand, the slurry in reformer 31 is fed to carbonate separator 34 to separate a cake contg. Na2CO3 and sodium bicarbonate, which then is recycled to tower 2.
COPYRIGHT: (C)1979,JPO&Japio
JP13941277A 1977-08-04 1977-11-22 Removing method for nitrogen oxides and sulfur dioxide in exhaust gas Pending JPS5472799A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP13941277A JPS5472799A (en) 1977-11-22 1977-11-22 Removing method for nitrogen oxides and sulfur dioxide in exhaust gas
US05/927,249 US4186176A (en) 1977-08-04 1978-07-21 Method of simultaneously removing sulfur dioxide and nitrogen oxides from exhaust gases
DE2833440A DE2833440C2 (en) 1977-08-04 1978-07-29 Process for the simultaneous removal of sulfur dioxide and nitrogen oxides from exhaust gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13941277A JPS5472799A (en) 1977-11-22 1977-11-22 Removing method for nitrogen oxides and sulfur dioxide in exhaust gas

Publications (1)

Publication Number Publication Date
JPS5472799A true JPS5472799A (en) 1979-06-11

Family

ID=15244626

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13941277A Pending JPS5472799A (en) 1977-08-04 1977-11-22 Removing method for nitrogen oxides and sulfur dioxide in exhaust gas

Country Status (1)

Country Link
JP (1) JPS5472799A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023138705A1 (en) * 2022-01-20 2023-07-27 中国中煤能源集团有限公司 Industrial carbon sequestration system and method for absorbing carbon dioxide gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023138705A1 (en) * 2022-01-20 2023-07-27 中国中煤能源集团有限公司 Industrial carbon sequestration system and method for absorbing carbon dioxide gas

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