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JPS5665676A - Treatment of liquid for treating stack gas - Google Patents

Treatment of liquid for treating stack gas

Info

Publication number
JPS5665676A
JPS5665676A JP14107979A JP14107979A JPS5665676A JP S5665676 A JPS5665676 A JP S5665676A JP 14107979 A JP14107979 A JP 14107979A JP 14107979 A JP14107979 A JP 14107979A JP S5665676 A JPS5665676 A JP S5665676A
Authority
JP
Japan
Prior art keywords
precipitate
precipitated
flocculated
inorg
ion
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
JP14107979A
Other languages
Japanese (ja)
Other versions
JPS5948675B2 (en
Inventor
Koichi Shigeta
Yoshio Hamao
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.)
IHI Corp
Original Assignee
Ishikawajima Harima Heavy Industries Co 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 Ishikawajima Harima Heavy Industries Co Ltd filed Critical Ishikawajima Harima Heavy Industries Co Ltd
Priority to JP54141079A priority Critical patent/JPS5948675B2/en
Publication of JPS5665676A publication Critical patent/JPS5665676A/en
Publication of JPS5948675B2 publication Critical patent/JPS5948675B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Treating Waste Gases (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

PURPOSE: To convert a precipitate to a disposable substance simply by a method wherein an inorg. coagulating agent containing Al ion is added to a waste liquid and, moreover, S2O6 2- is flocculated and precipitated by adjusting a pH of waste water to a specific valve and the generated precipitate is subjected to heat treatment.
CONSTITUTION: Waste water from a wet stack gas desulfurizing procedure of a step 1 is received in a preliminary flocculation and precipitation tank for use with a raw water storage tank in a step 2. Herein, the SS therein is precipitated naturally as well as the pH is maintained in the vicinity of a neutral point by Ca(OH)2 to remove Fe3+ or Cr3+ by precipitation. Subsequently, in a flocculation and precipitation tank of a step 3, the pH is moreover increased by Ca(OH)2 to precipitate and remove almost all metal ions as well as SO4 2-. Next, in a step 4 for flocculating and precipitating S2O6 2-, an inorg. flocculating agent containing Al ion is added and, by adding an alkali agent based on Ca(OH)2 to adjust the pH to 10 or more, said S2O6 2- is flocculated and precipitated and the obtained precipitate is decomposed by heating in an incinerating furnace of a heat treatment step 5. In this case, SO2 gas is not generated and the waste liquid in the step 4 is discharged after neutralized and filtered.
COPYRIGHT: (C)1981,JPO&Japio
JP54141079A 1979-10-31 1979-10-31 Treatment method for wet flue gas treatment liquid Expired JPS5948675B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54141079A JPS5948675B2 (en) 1979-10-31 1979-10-31 Treatment method for wet flue gas treatment liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54141079A JPS5948675B2 (en) 1979-10-31 1979-10-31 Treatment method for wet flue gas treatment liquid

Publications (2)

Publication Number Publication Date
JPS5665676A true JPS5665676A (en) 1981-06-03
JPS5948675B2 JPS5948675B2 (en) 1984-11-28

Family

ID=15283720

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54141079A Expired JPS5948675B2 (en) 1979-10-31 1979-10-31 Treatment method for wet flue gas treatment liquid

Country Status (1)

Country Link
JP (1) JPS5948675B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6320092A (en) * 1986-07-14 1988-01-27 Sanee Kogyo Kk Solid-liquid separator
JPH01304100A (en) * 1988-06-01 1989-12-07 Babcock Hitachi Kk Apparatus for treating waste water desulfurized by wet exhaust gas desulfurization device
JP2016168533A (en) * 2015-03-12 2016-09-23 オルガノ株式会社 Processing method and processing unit of dithionic acid-containing water
CN110642430A (en) * 2019-10-31 2020-01-03 重庆雅丽洁环保产业发展有限公司 Treatment process of chromium-containing wastewater

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6320092A (en) * 1986-07-14 1988-01-27 Sanee Kogyo Kk Solid-liquid separator
JPH01304100A (en) * 1988-06-01 1989-12-07 Babcock Hitachi Kk Apparatus for treating waste water desulfurized by wet exhaust gas desulfurization device
JP2016168533A (en) * 2015-03-12 2016-09-23 オルガノ株式会社 Processing method and processing unit of dithionic acid-containing water
CN110642430A (en) * 2019-10-31 2020-01-03 重庆雅丽洁环保产业发展有限公司 Treatment process of chromium-containing wastewater

Also Published As

Publication number Publication date
JPS5948675B2 (en) 1984-11-28

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