TW326404B - An exhaust desulfurization method - Google Patents

An exhaust desulfurization method

Info

Publication number
TW326404B
TW326404B TW085100125A TW85100125A TW326404B TW 326404 B TW326404 B TW 326404B TW 085100125 A TW085100125 A TW 085100125A TW 85100125 A TW85100125 A TW 85100125A TW 326404 B TW326404 B TW 326404B
Authority
TW
Taiwan
Prior art keywords
treatment liquid
magnesium
desulfurization
exhaust
sulfite
Prior art date
Application number
TW085100125A
Other languages
Chinese (zh)
Inventor
Kenichi Nakagawa
Original Assignee
Toyo Engineering Corp
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 Toyo Engineering Corp filed Critical Toyo Engineering Corp
Application granted granted Critical
Publication of TW326404B publication Critical patent/TW326404B/en

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
    • B01D53/48—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
    • B01D53/502—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 solution or suspension
    • 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
    • B01D53/68—Halogens or halogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/604—Hydroxides

Abstract

An exhaust desulfurization method, which comprises: a desulfurization process comprising contacting the exhaust containing sulfur oxides with a treatment liquid containing a magnesium series desulfurization agent at conditions where the treatment liquid is at temperatures of 50~60℃ and has a pH of 5.0~7.5, in order to allow the sulfur oxides contained in the exhaust to be absorbed by the treatment liquid, in which the magnesium series desulfurization agent is comprised of alkaline magnesium compounds comprising magnesium oxide or magnesium hydroxide as the main ingredient, and the treatment liquid obtained in the desulfurization process is an aqueous solution comprising a mixture of magnesium sulfite, magnesium hydrogen sulfite and magnesium sulfate, as well as a suspension of gypsum dihydrate and minute amount of calcium sulfite; an oxidation process comprising contacting the treatment liquid of the desulfurization process with an oxygen-containing gas in order to convert the magnesium salts in the treatment liquid into magnesium sulfate and adjust the pH value of the treatment liquid to 2~3; a double decomposition process comprising adding an alkaline calcium compound into the treatment liquid of the oxidation process and decomposing the magnesium sulfate in the treatment liquid into magnesium hydroxide, and recycling the mixture slurry obtained from the double decomposition process to the desulfurization process, while removing the gypsum dihydrate from the treatment liquid out of the system; which is characterized in that the mixture slurry obtained from the double decomposition process is added with a part of the treatment liquid from the desulfurization process and the calcium ions in the mixture slurry are converted into calcium sulfite, followed by recycling to the desulfurization process.
TW085100125A 1995-08-22 1996-01-06 An exhaust desulfurization method TW326404B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21329695A JP3751340B2 (en) 1995-08-22 1995-08-22 Exhaust gas desulfurization method

Publications (1)

Publication Number Publication Date
TW326404B true TW326404B (en) 1998-02-11

Family

ID=16636779

Family Applications (1)

Application Number Title Priority Date Filing Date
TW085100125A TW326404B (en) 1995-08-22 1996-01-06 An exhaust desulfurization method

Country Status (8)

Country Link
JP (1) JP3751340B2 (en)
KR (1) KR0174794B1 (en)
CN (1) CN1089022C (en)
AU (1) AU674822B1 (en)
CZ (1) CZ56196A3 (en)
MY (1) MY112500A (en)
PL (1) PL183184B1 (en)
TW (1) TW326404B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW421607B (en) * 1997-10-06 2001-02-11 Hitachi Shipbuilding Eng Co Process and apparatus for removing acid gases from exhaust gases
CN1085088C (en) * 1998-03-11 2002-05-22 安乐仁 Drug for curing psoriasis
KR100303388B1 (en) * 1999-06-02 2001-09-24 세 영 모 Aaaaa
CN100335154C (en) * 2005-09-09 2007-09-05 清华大学 Magnesium oxide flue gas desulfurization and outgrowth thick-slurry method oxidation reclaim process
CN100404108C (en) * 2005-12-08 2008-07-23 六合天融（北京）环保科技有限公司 Method for preparing desulfurizer magnesium oxide and sulfur dioxide utilizing desulfurizing by-product magnesium sulfite by magnesium process
CN100435910C (en) * 2006-04-10 2008-11-26 广州市天赐三和环保工程有限公司 Fume desulfurizing process employing multiple circulation and stable double alkali method and apparatus
CN101879406B (en) * 2010-07-15 2011-05-25 煤炭工业济南设计研究院有限公司 Dual-alkali flue gas desulfurization device and desulfurization method
CN102172472B (en) * 2011-02-14 2013-05-08 彭振超 Method for smoke desulphurization by utilizing dolomitic lime
JP6223654B2 (en) * 2011-10-31 2017-11-01 三菱日立パワーシステムズ株式会社 Flue gas desulfurization equipment
TWI457167B (en) * 2011-11-18 2014-10-21 Long Chen Paper Co Ltd Apparatus for flue gas desulfurization with zero emission using system for recovery and recycle of magnesium hydroxide
CN104959012A (en) * 2015-04-17 2015-10-07 熊天渝 Magnesium-calcium based wet method desulphurization system and method for removing sulfur dioxide in flue gas and producing gypsum
CN107042060B (en) * 2017-04-05 2022-12-13 中冶焦耐(大连)工程技术有限公司 Recycling method of ammonia-containing acidic gas
CN107185385A (en) * 2017-07-07 2017-09-22 金川集团股份有限公司 A kind of spuious flue gas during smelting wet dedusting of atm number, sulfur method
JP6958682B2 (en) * 2018-08-08 2021-11-02 宇部興産株式会社 Cement composition manufacturing method and cement composition manufacturing system
CN110605011A (en) * 2019-08-08 2019-12-24 陆泳凯 Magnesium-calcium double-alkali flue gas desulfurization method
CN116124939B (en) * 2023-01-10 2024-03-26 华北电力科学研究院有限责任公司 Desulfurization slurry gypsum supersaturation degree and gypsum scaling risk evaluation method and system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5190978A (en) * 1975-02-04 1976-08-10 HAIGASUCHUNOIOSANKABUTSUOJOKYOSURUHOHO
JPS5488870A (en) * 1978-08-08 1979-07-14 Idemitsu Kosan Co Ltd Wet exhaust gas desulfurization method
CA1310807C (en) * 1986-05-29 1992-12-01 Roderick Beittel Method for reduction of sulfur products from flue gases by injection of powdered alkali sorbent at intermediate temperatures
JPH03143527A (en) * 1989-01-10 1991-06-19 Kenichi Nakagawa Method for desulfurizing waste gas
CA2147059C (en) * 1994-04-28 1999-08-10 John W. College Magnesium-enhanced sulfur dioxide scrubbing with gypsum formation
CA2159521C (en) * 1994-10-07 1999-11-09 Shigeo Iiyama Method for desulfurizing exhaust gas

Also Published As

Publication number Publication date
JPH0957053A (en) 1997-03-04
PL183184B1 (en) 2002-06-28
CZ56196A3 (en) 1997-07-16
CN1143535A (en) 1997-02-26
PL313006A1 (en) 1997-03-03
KR0174794B1 (en) 1999-02-18
KR970009863A (en) 1997-03-27
AU674822B1 (en) 1997-01-09
MY112500A (en) 2001-06-30
CN1089022C (en) 2002-08-14
JP3751340B2 (en) 2006-03-01

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