JPS5560025A - Production of gypsum - Google Patents

Production of gypsum

Info

Publication number
JPS5560025A
JPS5560025A JP13230478A JP13230478A JPS5560025A JP S5560025 A JPS5560025 A JP S5560025A JP 13230478 A JP13230478 A JP 13230478A JP 13230478 A JP13230478 A JP 13230478A JP S5560025 A JPS5560025 A JP S5560025A
Authority
JP
Japan
Prior art keywords
slurry
line
gypsum
calcium sulfite
sulfuric acid
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
JP13230478A
Other languages
Japanese (ja)
Inventor
Naoyuki Takahashi
Yoshihiro Shiraishi
Naohiko Ugawa
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 JP13230478A priority Critical patent/JPS5560025A/en
Publication of JPS5560025A publication Critical patent/JPS5560025A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

PURPOSE: To obtain sypsum by mixing a calcium sulfite-base slurry with part of the slurry after oxidation after which the mixt. is pH-adjusted and oxidized to reduce the amt. of sulfuric acid used as well as to prevent scale attachment of a conventional method.
CONSTITUTION: Calcium sulfite-base slurry 1 discharged in desulfurization of exhaust gas enters pH adjusting vessel 2 through line 10. On the other hand, part of the slurry after oxidation is drawn out of oxidation tower 4 through line 5, supplied with sulfuric acid from line 6, and introduced into vessel 2. The mixed slurry adjusted to pH≤5 in vessel 2 enters tower 4 through line 3. In tower 4 the calcium sulfite is oxidized to gypsum with compressed air 13, and the gypsum-contg. slurry is drawn out through line 8 and passed through centrifugal separator 10 to obtain gypsum 12. By this method scale formation due to local pH lowering is prevented unlike a conventional method, and local heating, decomposition of calcium sulfite into SO2, etc. are also prevented. In addn., consumption of sulfuric acid can be reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP13230478A 1978-10-27 1978-10-27 Production of gypsum Pending JPS5560025A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13230478A JPS5560025A (en) 1978-10-27 1978-10-27 Production of gypsum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13230478A JPS5560025A (en) 1978-10-27 1978-10-27 Production of gypsum

Publications (1)

Publication Number Publication Date
JPS5560025A true JPS5560025A (en) 1980-05-06

Family

ID=15078161

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13230478A Pending JPS5560025A (en) 1978-10-27 1978-10-27 Production of gypsum

Country Status (1)

Country Link
JP (1) JPS5560025A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143839A (en) * 1974-10-11 1976-04-14 Toyota Auto Body Co Ltd Shatsutaano boshinbosuisochi
JPS5144919A (en) * 1974-08-13 1976-04-16 Shii Jii Kon Ltd

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5144919A (en) * 1974-08-13 1976-04-16 Shii Jii Kon Ltd
JPS5143839A (en) * 1974-10-11 1976-04-14 Toyota Auto Body Co Ltd Shatsutaano boshinbosuisochi

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