JPS54110195A - Gypsum recovering method in wet exhaust gas desulfurization apparatus - Google Patents

Gypsum recovering method in wet exhaust gas desulfurization apparatus

Info

Publication number
JPS54110195A
JPS54110195A JP1639578A JP1639578A JPS54110195A JP S54110195 A JPS54110195 A JP S54110195A JP 1639578 A JP1639578 A JP 1639578A JP 1639578 A JP1639578 A JP 1639578A JP S54110195 A JPS54110195 A JP S54110195A
Authority
JP
Japan
Prior art keywords
gypsum
tank
slurry
absorbing liquid
returned
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
JP1639578A
Other languages
Japanese (ja)
Inventor
Masakatsu Nishimura
Toshio Katsube
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 Power Ltd
Original Assignee
Babcock Hitachi KK
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 Babcock Hitachi KK filed Critical Babcock Hitachi KK
Priority to JP1639578A priority Critical patent/JPS54110195A/en
Publication of JPS54110195A publication Critical patent/JPS54110195A/en
Pending legal-status Critical Current

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  • Treating Waste Gases (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

PURPOSE: To easily recover gypsum of high quality while preventing an increase of scale in an absorption tower by returning a slurry contg. finely divided gypsum, to a SOx absorbing liquid, separated by the operation of removing water in recovering gypsum from the absorbing liquid to make the diameter of by-product gypsum larger.
CONSTITUTION: In absorption tower 6, exhaust gas 1 from cooling tower 2 is contacted to a lime absorbing liquid, forming CaSO3. A CaSO3-contg. slurry in absorption tower circulation tank 13 is fed to pH regulation vessel 17 through cooling tower circulation tank 5, and sulfuric acid 18 is added to unreacted lime to convert the lime into gypsum. The slurry is then supplied to oxidation unit 20, where compressed air 21 is fed to convert Ca(HSO3)2 into gypsum. A conc. slurry is separated from thickener 22 and fed to centrifugal separator 29 through tank 27 to recover by- product gypsum 30. The overflow of separator 29 and finely divided gypsum passed through a filter cloth are returned to tank 13 through effluent tank 31. On the other hand, the overflow of thickener 22 is recovered 10 through tank 24 and returned to tank 13. Thus, finely-divided gypsum in the water removing operaton is returned to the absorbing liquid to be used as seed crystals for crystallization of gypsum in the liquid.
COPYRIGHT: (C)1979,JPO&Japio
JP1639578A 1978-02-17 1978-02-17 Gypsum recovering method in wet exhaust gas desulfurization apparatus Pending JPS54110195A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1639578A JPS54110195A (en) 1978-02-17 1978-02-17 Gypsum recovering method in wet exhaust gas desulfurization apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1639578A JPS54110195A (en) 1978-02-17 1978-02-17 Gypsum recovering method in wet exhaust gas desulfurization apparatus

Publications (1)

Publication Number Publication Date
JPS54110195A true JPS54110195A (en) 1979-08-29

Family

ID=11915047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1639578A Pending JPS54110195A (en) 1978-02-17 1978-02-17 Gypsum recovering method in wet exhaust gas desulfurization apparatus

Country Status (1)

Country Link
JP (1) JPS54110195A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009095698A (en) * 2007-10-15 2009-05-07 Chugoku Electric Power Co Inc:The Method for filling with gypsum slurry and limestone slurry in flue gas desulfurizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009095698A (en) * 2007-10-15 2009-05-07 Chugoku Electric Power Co Inc:The Method for filling with gypsum slurry and limestone slurry in flue gas desulfurizer

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