JPS5472770A - Treating method of solutions after wet type exhaust smoke desulfurization treatment - Google Patents
Treating method of solutions after wet type exhaust smoke desulfurization treatmentInfo
- Publication number
- JPS5472770A JPS5472770A JP13945077A JP13945077A JPS5472770A JP S5472770 A JPS5472770 A JP S5472770A JP 13945077 A JP13945077 A JP 13945077A JP 13945077 A JP13945077 A JP 13945077A JP S5472770 A JPS5472770 A JP S5472770A
- Authority
- JP
- Japan
- Prior art keywords
- solution
- exhaust smoke
- wet type
- sulfuric acid
- solutions
- 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
Links
Landscapes
- Treating Waste Gases (AREA)
- Removal Of Specific Substances (AREA)
Abstract
PURPOSE: To enable COD components mainly composed of dithionate to be removed by adding sulfuric acid and heating in treatment of in-system solutions or discharge water in an exhaust smoke desulfurization apparatus using Ca salt or Na as absorbent.
CONSTITUTION: In a wet type exhaust smoke desulfurization process using slurry of Ca(OH)2 or aqueous NaOH solution as an absorption solution, sulfuric acid is added to the in-system solution or discharge solution after the desulfurization treatment and the solution is subjected to heat treatment under atmospheric pressure to decompose the COD components mainly composed of dithionate to SO2 and sulfate. Decomposition conditions are desirably sulfuric acid concentrations 0.3 to 0.6mol/l and 1 to 8 hours of heating at 95°C to boiling point.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13945077A JPS5472770A (en) | 1977-11-22 | 1977-11-22 | Treating method of solutions after wet type exhaust smoke desulfurization treatment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13945077A JPS5472770A (en) | 1977-11-22 | 1977-11-22 | Treating method of solutions after wet type exhaust smoke desulfurization treatment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5472770A true JPS5472770A (en) | 1979-06-11 |
Family
ID=15245481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13945077A Pending JPS5472770A (en) | 1977-11-22 | 1977-11-22 | Treating method of solutions after wet type exhaust smoke desulfurization treatment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5472770A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6217839B1 (en) * | 1999-08-20 | 2001-04-17 | Uop Llc | Removal of sulfur compounds from gaseous waste streams |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5169485A (en) * | 1974-12-14 | 1976-06-16 | Asahi Chemical Ind | Nichionsanenno jokyohoho |
JPS52146962A (en) * | 1976-06-02 | 1977-12-07 | Hitachi Ltd | Process for treating blow down water from wet type waste gas denitrator |
-
1977
- 1977-11-22 JP JP13945077A patent/JPS5472770A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5169485A (en) * | 1974-12-14 | 1976-06-16 | Asahi Chemical Ind | Nichionsanenno jokyohoho |
JPS52146962A (en) * | 1976-06-02 | 1977-12-07 | Hitachi Ltd | Process for treating blow down water from wet type waste gas denitrator |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6217839B1 (en) * | 1999-08-20 | 2001-04-17 | Uop Llc | Removal of sulfur compounds from gaseous waste streams |
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