GB1356527A - Methods of washing away gypseous scale from scrubbers for smoke desulphurization by the wet lime-gypsum process - Google Patents

Methods of washing away gypseous scale from scrubbers for smoke desulphurization by the wet lime-gypsum process

Info

Publication number
GB1356527A
GB1356527A GB5235772A GB5235772A GB1356527A GB 1356527 A GB1356527 A GB 1356527A GB 5235772 A GB5235772 A GB 5235772A GB 5235772 A GB5235772 A GB 5235772A GB 1356527 A GB1356527 A GB 1356527A
Authority
GB
United Kingdom
Prior art keywords
scale
gypseous
fed
scrubbers
washing
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
GB5235772A
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
Publication of GB1356527A publication Critical patent/GB1356527A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0006—Controlling or regulating processes
    • B01J19/002—Avoiding undesirable reactions or side-effects, e.g. avoiding explosions, or improving the yield by suppressing side-reactions
    • 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
    • C01F11/48—Sulfites
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/083—Mineral agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00245—Avoiding undesirable reactions or side-effects
    • B01J2219/00252—Formation of deposits other than coke

Abstract

1356527 Removing gypseous scale MITSUBISHI JUKOGYO K K 13 Nov 1972 [11 Nov 1971] 52357/72 Heading C7E Gypseous scale formed on scrubbers for smoke disulpherization by the wet lime-gypsum process is removed by washing with an aqueous solution of sodium carbonate. Sulphur containing effluent gas is fed to first and second absorption columns 1, 1' and thence to the atmosphere. Lime slurry is fed to the absorption columns where it is converted into calcium sulphite and sulphate, which are then extracted for gypsum reclaiming. The scale is removed by washing with sodium carbonate fed from a tank 3 by pump 5. After washing, the solution is stored in a tank 4 and fed to a tank 2 where it is mixed with the lime slurry to form calcium sulphite and caustic soda.
GB5235772A 1971-11-11 1972-11-13 Methods of washing away gypseous scale from scrubbers for smoke desulphurization by the wet lime-gypsum process Expired GB1356527A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46090116A JPS5229278B2 (en) 1971-11-11 1971-11-11

Publications (1)

Publication Number Publication Date
GB1356527A true GB1356527A (en) 1974-06-12

Family

ID=13989530

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5235772A Expired GB1356527A (en) 1971-11-11 1972-11-13 Methods of washing away gypseous scale from scrubbers for smoke desulphurization by the wet lime-gypsum process

Country Status (5)

Country Link
JP (1) JPS5229278B2 (en)
FR (1) FR2159529B1 (en)
GB (1) GB1356527A (en)
IT (1) IT983208B (en)
SU (1) SU725551A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5387978A (en) * 1977-01-12 1978-08-02 Sumitomo Metal Ind Ltd Removing apparatus for scale formed in wet exhaust gas desulfurizing appara tus

Also Published As

Publication number Publication date
SU725551A3 (en) 1980-03-30
JPS5229278B2 (en) 1977-08-01
JPS4853995A (en) 1973-07-28
FR2159529A1 (en) 1973-06-22
IT983208B (en) 1974-10-31
DE2256107B2 (en) 1975-05-28
DE2256107A1 (en) 1973-05-24
FR2159529B1 (en) 1975-03-28
SU725551A1 (en) 1980-03-30

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years