JPS5499074A - Recovering method for gypsum in wet desulfurization apparatus for exhaust combustion gas - Google Patents
Recovering method for gypsum in wet desulfurization apparatus for exhaust combustion gasInfo
- Publication number
- JPS5499074A JPS5499074A JP530978A JP530978A JPS5499074A JP S5499074 A JPS5499074 A JP S5499074A JP 530978 A JP530978 A JP 530978A JP 530978 A JP530978 A JP 530978A JP S5499074 A JPS5499074 A JP S5499074A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- particle size
- slurry
- oxidation
- lime
- 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
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
PURPOSE: To recover high quality gypsum of uniform large particle size, by dividing gypsum slurry formed in oxidation stage of a lime desulfurization process into fine particle size slurry and larger particle size slurry, the former being returned to the absorbing soln. and the latter being subjected to gypsum recovery, thus occurrance of scale trouble is prevented.
CONSTITUTION: Exhaust gas 1 contg. SOx discharged from a boiler is colled to nearly 55°C in a cooling tower 2, removed of SOx in an ansorption tower 7 by washing with slurry contg. lime stone or lime etc., and the exhaust gas is released to the air. A portion of circulating absorbing soln. is drawn off and sent to a pH control tank 13, where unreacted lime stone is converted to gypsum by the addn. of sulfuric acid from a sulfuric acid-feeding pipe 14, and the pH is adjusted so as to be suitable for oxidation. The soln. is then delivered to an oxidation tank 16, where sulfite contained in the slurry is oxidized to sulfate with compressed air sent through a pipe 17, and is divided in a liq. cyclone 18 into slurries of gypsum of large particle size and fine particle size. The former is dehydrated in a dehydrator 23 to recover gypsum 24, and the latter is returned to the absorption tower 7, where it is used as gypsum seeds and as a portion of water to be replenished to process water.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP530978A JPS5499074A (en) | 1978-01-23 | 1978-01-23 | Recovering method for gypsum in wet desulfurization apparatus for exhaust combustion gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP530978A JPS5499074A (en) | 1978-01-23 | 1978-01-23 | Recovering method for gypsum in wet desulfurization apparatus for exhaust combustion gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5499074A true JPS5499074A (en) | 1979-08-04 |
Family
ID=11607665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP530978A Pending JPS5499074A (en) | 1978-01-23 | 1978-01-23 | Recovering method for gypsum in wet desulfurization apparatus for exhaust combustion gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5499074A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4487784A (en) * | 1982-02-22 | 1984-12-11 | Babcock-Hitachi Kabushiki Kaisha | Limestone-gypsum flue gas desulfurization process |
| CN103435021A (en) * | 2013-08-19 | 2013-12-11 | 瓮福（集团）有限责任公司 | Wet process phosphoric acid production device and method |
| WO2019210499A1 (en) * | 2018-05-04 | 2019-11-07 | 江苏申江环境科技有限公司 | Device for cleaning fouling in desulfurization entrance |
-
1978
- 1978-01-23 JP JP530978A patent/JPS5499074A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4487784A (en) * | 1982-02-22 | 1984-12-11 | Babcock-Hitachi Kabushiki Kaisha | Limestone-gypsum flue gas desulfurization process |
| CN103435021A (en) * | 2013-08-19 | 2013-12-11 | 瓮福（集团）有限责任公司 | Wet process phosphoric acid production device and method |
| WO2019210499A1 (en) * | 2018-05-04 | 2019-11-07 | 江苏申江环境科技有限公司 | Device for cleaning fouling in desulfurization entrance |
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