JPS6447493A - Treatment of waste water from flue gas desulfurization - Google Patents

Treatment of waste water from flue gas desulfurization

Info

Publication number
JPS6447493A
JPS6447493A JP62203046A JP20304687A JPS6447493A JP S6447493 A JPS6447493 A JP S6447493A JP 62203046 A JP62203046 A JP 62203046A JP 20304687 A JP20304687 A JP 20304687A JP S6447493 A JPS6447493 A JP S6447493A
Authority
JP
Japan
Prior art keywords
water
waste water
stage
hydrochloric acid
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.)
Granted
Application number
JP62203046A
Other languages
Japanese (ja)
Other versions
JPH0716668B2 (en
Inventor
Taketoshi Tsushima
Shinichi Arao
Yasuo Kimura
Tetsuya Ito
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 JP62203046A priority Critical patent/JPH0716668B2/en
Publication of JPS6447493A publication Critical patent/JPS6447493A/en
Publication of JPH0716668B2 publication Critical patent/JPH0716668B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Treating Waste Gases (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

PURPOSE:To reduce the treating cost by controlling the hydrochloric acid concn. in the waste water from a cooling stage, heating the water to carry out acidolysis, and then neutralizing the water. CONSTITUTION:Since the waste water 21 from the cooling stage contains dithionic acid generated in an absorption stage 2, hydrochloric acid 36 is added by a hydrochloric acid mixer 12 to obtain a 0.2-2% acid soln. The water is then heated to >=95 deg.C by steam 37 in a steam mixer 13, and introduced into a heat-insulated decomposition vessel 14 wherein dithionic acid is decomposed. After acidolysis, the water is introduced into a rough-neutralization stage 7, and the pH is controlled to 2-4 by slaked lime 38 to deposit gypsum. Slaked lime 38 is then added in a pH regulating stage 8 to control the pH to 7-9. As a result, the fluorine is converted into difficulty soluble calcium fluoride which is precipitated and removed.
JP62203046A 1987-08-17 1987-08-17 Flue gas desulfurization wastewater treatment method Expired - Lifetime JPH0716668B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62203046A JPH0716668B2 (en) 1987-08-17 1987-08-17 Flue gas desulfurization wastewater treatment method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62203046A JPH0716668B2 (en) 1987-08-17 1987-08-17 Flue gas desulfurization wastewater treatment method

Publications (2)

Publication Number Publication Date
JPS6447493A true JPS6447493A (en) 1989-02-21
JPH0716668B2 JPH0716668B2 (en) 1995-03-01

Family

ID=16467452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62203046A Expired - Lifetime JPH0716668B2 (en) 1987-08-17 1987-08-17 Flue gas desulfurization wastewater treatment method

Country Status (1)

Country Link
JP (1) JPH0716668B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104803521A (en) * 2015-05-06 2015-07-29 广州新普利节能环保科技有限公司 Desulphurization waste water purifying system and desulphurization waste water purifying process

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53147678A (en) * 1977-05-31 1978-12-22 Kureha Chem Ind Co Ltd Improved dry exhaust gas desurfurization method
JPS571486A (en) * 1980-06-03 1982-01-06 Mitsubishi Heavy Ind Ltd Disposal of waste water

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53147678A (en) * 1977-05-31 1978-12-22 Kureha Chem Ind Co Ltd Improved dry exhaust gas desurfurization method
JPS571486A (en) * 1980-06-03 1982-01-06 Mitsubishi Heavy Ind Ltd Disposal of waste water

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104803521A (en) * 2015-05-06 2015-07-29 广州新普利节能环保科技有限公司 Desulphurization waste water purifying system and desulphurization waste water purifying process

Also Published As

Publication number Publication date
JPH0716668B2 (en) 1995-03-01

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