JPS5756084A - Treatment of waste water obtained by stack gas desulfurization - Google Patents

Treatment of waste water obtained by stack gas desulfurization

Info

Publication number
JPS5756084A
JPS5756084A JP55130767A JP13076780A JPS5756084A JP S5756084 A JPS5756084 A JP S5756084A JP 55130767 A JP55130767 A JP 55130767A JP 13076780 A JP13076780 A JP 13076780A JP S5756084 A JPS5756084 A JP S5756084A
Authority
JP
Japan
Prior art keywords
liquid
solid
waste water
gas desulfurization
stack gas
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
JP55130767A
Other languages
Japanese (ja)
Inventor
Yoshihiro Eto
Yasuhiro Sekikawa
Tadashi Takadoi
Takafumi Murakami
Jun Fukui
Shigeji 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.)
Kawasaki Heavy Industries Ltd
Kurita Water Industries Ltd
Kawasaki Motors Ltd
Original Assignee
Kawasaki Heavy Industries Ltd
Kurita Water Industries Ltd
Kawasaki Jukogyo 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 Kawasaki Heavy Industries Ltd, Kurita Water Industries Ltd, Kawasaki Jukogyo KK filed Critical Kawasaki Heavy Industries Ltd
Priority to JP55130767A priority Critical patent/JPS5756084A/en
Publication of JPS5756084A publication Critical patent/JPS5756084A/en
Pending legal-status Critical Current

Links

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  • Treating Waste Gases (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

PURPOSE: To effectively treat the waste wter obtained by stack gas desulfurization apparatus, by adjusting the pH of said waste water from the apparatus in which oxide or hydroxide of Mg, Ca are used as an absorbent, to 7W9, and performing solid-liquid sepn. thereafter executing solid-liquid separation through adjusting the pH of treated liquid to ≥9.5.
CONSTITUTION: Stack gas 1 containing sulfur oxide is led to an absorbing column 2 and desulfurized by bringing it into contact with absorbing liquid 3 that contains oxide or hydroxide or Mg, Ca. This waste water obtained by gas desulfurization is led to the first process which consists of a reaction tank 16 and a solid-liquid separation means 18. After adjusting the pH to 7W9 by adding acid or alkaline agent 17, it is separated into solid phase and liquid phase. The treated water is led to the second process which consists of a reaction tank 20 and a solid-liquid separation means 22. After making the pH to ≥9.5 by adding an alkaline agent 21, it is separated into precipitate 23 and supernatant 24. The precipitate 23 is recovered as an absorbent and returned to the sulfur oxide absorption process and utilized effectively.
COPYRIGHT: (C)1982,JPO&Japio
JP55130767A 1980-09-22 1980-09-22 Treatment of waste water obtained by stack gas desulfurization Pending JPS5756084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55130767A JPS5756084A (en) 1980-09-22 1980-09-22 Treatment of waste water obtained by stack gas desulfurization

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55130767A JPS5756084A (en) 1980-09-22 1980-09-22 Treatment of waste water obtained by stack gas desulfurization

Publications (1)

Publication Number Publication Date
JPS5756084A true JPS5756084A (en) 1982-04-03

Family

ID=15042166

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55130767A Pending JPS5756084A (en) 1980-09-22 1980-09-22 Treatment of waste water obtained by stack gas desulfurization

Country Status (1)

Country Link
JP (1) JPS5756084A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6290885U (en) * 1985-11-28 1987-06-10
US5817283A (en) * 1996-09-06 1998-10-06 Dravo Lime Company Method for removing sulfur dioxide and nitrogen oxides from combustion gases

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6290885U (en) * 1985-11-28 1987-06-10
US5817283A (en) * 1996-09-06 1998-10-06 Dravo Lime Company Method for removing sulfur dioxide and nitrogen oxides from combustion gases
US5827488A (en) * 1996-09-06 1998-10-27 Dravo Lime Company Process for removing SO2 and NOx from a gaseous stream

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