JPS5771819A - Oxidation of calcium sulfite - Google Patents

Oxidation of calcium sulfite

Info

Publication number
JPS5771819A
JPS5771819A JP14463080A JP14463080A JPS5771819A JP S5771819 A JPS5771819 A JP S5771819A JP 14463080 A JP14463080 A JP 14463080A JP 14463080 A JP14463080 A JP 14463080A JP S5771819 A JPS5771819 A JP S5771819A
Authority
JP
Japan
Prior art keywords
over
calcium sulfite
oxidation
gas
suspension
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
JP14463080A
Other languages
Japanese (ja)
Inventor
Naoharu Shinoda
Atsushi Tatani
Naohiko Ugawa
Susumu Okino
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP14463080A priority Critical patent/JPS5771819A/en
Priority to DE19813137278 priority patent/DE3137278C2/en
Publication of JPS5771819A publication Critical patent/JPS5771819A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates
    • C01F11/464—Sulfates of Ca from gases containing sulfur oxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/46—Sulfates

Abstract

PURPOSE: A suspension containing calcium sulfite is adjusted to a specific pH and over a specific temperature and a gas containing oxygen is passed through to produce gypsum with a simple facility in low costs.
CONSTITUTION: A suspension containing calcium sulfite that is excluded from the sulfur dioxide absorption column in the wet lime-gypsum desulfurizer for disposing the exhaust gas from boilers is combined with calcium carbonate or slaked lime to adjust the pH to over 6.5. After neutralization, the suspension is heated up over 60°C and fed into the oxidation columen into which a gas containing oxygen gas, generally air is blown to produce gypsum.
COPYRIGHT: (C)1982,JPO&Japio
JP14463080A 1980-10-16 1980-10-16 Oxidation of calcium sulfite Pending JPS5771819A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP14463080A JPS5771819A (en) 1980-10-16 1980-10-16 Oxidation of calcium sulfite
DE19813137278 DE3137278C2 (en) 1980-10-16 1981-09-18 Process for the oxidation of calcium sulphite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14463080A JPS5771819A (en) 1980-10-16 1980-10-16 Oxidation of calcium sulfite

Publications (1)

Publication Number Publication Date
JPS5771819A true JPS5771819A (en) 1982-05-04

Family

ID=15366507

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14463080A Pending JPS5771819A (en) 1980-10-16 1980-10-16 Oxidation of calcium sulfite

Country Status (2)

Country Link
JP (1) JPS5771819A (en)
DE (1) DE3137278C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6186457A (en) * 1984-10-02 1986-05-01 富士不燃建材工業株式会社 Manufacture of limestone hardened body

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58172230A (en) * 1982-04-01 1983-10-11 Mitsubishi Heavy Ind Ltd Method for recovering gypsum after desulfurizing exhaust gas
DE3240317C2 (en) * 1982-10-30 1986-06-12 Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen GmbH & Co KG, 4300 Essen Process for the production of calcium sulphate dihydrate in the course of the desulphurisation of flue gases from power plant boiler systems
DE3512500A1 (en) * 1985-04-06 1986-10-09 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Multi-stage HCl, SO2 and NOx scrubbing process for flue gas purification, preferably downstream of fossil-fuel power stations
EP1978100A1 (en) * 2007-04-03 2008-10-08 Stichting Geodelft Microbiologically induced carbonate precipitation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA950169A (en) * 1970-10-26 1974-07-02 Kureha Kagaku Kogyo Kabushiki Kaisha Production of gypsum from combustion exhaust gas
DE2308783C3 (en) * 1972-02-23 1979-07-26 Kureha Kagaku Kogyo K.K., Tokio Process for removing sulfur dioxide from exhaust gases
JPS5211680B2 (en) * 1973-03-14 1977-04-01
US3961021A (en) * 1973-09-25 1976-06-01 Kureha Kagaku Kogyo Kabushiki Kaisha Method for removing sulfur dioxide from combustion exhaust gas
JPS6031764B2 (en) * 1977-01-17 1985-07-24 呉羽化学工業株式会社 Desulfurization method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6186457A (en) * 1984-10-02 1986-05-01 富士不燃建材工業株式会社 Manufacture of limestone hardened body

Also Published As

Publication number Publication date
DE3137278C2 (en) 1986-02-13
DE3137278A1 (en) 1982-06-24

Similar Documents

Publication Publication Date Title
ES2175072T3 (en) HIGH PURITY CALCIUM CARBONATE MANUFACTURING METHOD.
GB1515046A (en) Method and apparatus for desulpherising flue gas
DE3662174D1 (en) Process for removing noxious materials from fumes
SE8100677L (en) METHOD OF ABSORPTION IN THE SEAWATER OF Sulfur Oxides from Smoke Gases
KR890004763A (en) Wet Desulfurization Method for Flue Gas Treatment
TW353624B (en) Desulfurization process for flue gases
ES8700307A1 (en) A process for removing gaseous sulphur compounds, particularly sulphur dioxide, from the flue gases of a furnace
AU3182489A (en) Process and apparatus for desulfurization
JPS5771819A (en) Oxidation of calcium sulfite
DK255383D0 (en) METHOD AND REACTOR FOR DESULATING HOT WASTE GAS
SE8206443L (en) PROCEDURE AND DEVICE FOR CLEANING OF GAS GAS
DE69201915T2 (en) Exhaust gas desulfurization process.
DK0555172T3 (en) "Process for the treatment of flue gas"
JPS55113621A (en) Manufacture of alpha hemihydrate gypsum
JPS5633024A (en) Wet process exhaust gas desulfurizing method
ES8700308A1 (en) Removal of gaseous sulfur compound from flue gas of furnace
JPS574278A (en) Treatment of cyan containing waste
JPS56126429A (en) Dry type desulfurizing method
ATE62612T1 (en) FLUE GAS DESULPHURIZATION PROCESS.
JPS5575727A (en) Slurry ph regulating method at wet desulfurization apparatus
JPS5360880A (en) Wet desulfurizing method for exhaust gas by use of slag
JPS55111826A (en) Desulfurizing device for smoke discharger
JPS522897A (en) Method for desulfurization and rejection of smoke using wet lime and g ypsum
JPS5297397A (en) Recovery of cypsum from wet flue gas desulfurization
JPS5295578A (en) Wet process desulfurization of exhaust gas by slag