JPS54107467A - Simultaneous removal of nitrogen oxide and sulfur oxide in burnt waste gas - Google Patents
Simultaneous removal of nitrogen oxide and sulfur oxide in burnt waste gasInfo
- Publication number
- JPS54107467A JPS54107467A JP1297178A JP1297178A JPS54107467A JP S54107467 A JPS54107467 A JP S54107467A JP 1297178 A JP1297178 A JP 1297178A JP 1297178 A JP1297178 A JP 1297178A JP S54107467 A JPS54107467 A JP S54107467A
- Authority
- JP
- Japan
- Prior art keywords
- waste gas
- caso
- liquid
- oxidizer
- filtrate
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
Abstract
PURPOSE: NO in burnt waste gas is oxidized to NO2 and washed with aqueous NaOH solution containing antioxidant to remove NOx and SOx. Ca salt is added to the washed solution to precipitate solid which is separated. The filtrate is circulated for reuse. The process effectuates NOx and SOx removal without being affected by O2 in waste gas.
CONSTITUTION: Burnt waste gas is transmitted through the cooling dust remover 2 to the oxidizer 3, where NO is oxidized to NO2 by oxidizing agent. The gas is then sent to the cleaning apparatus 6 to be cleaned with aqueous NaOH solution of 10 to 160m mole/1, removing NOx and SOx. The absorbing liquid is sent from the apparatus 6 to the gypsum-substituting apparatus 8, where the liquid is adjusted to pH 10 or greater by adding Ca(OH)2 to precipitate CaSO3, CaSO4 and amino Ca compounds. The liquid-solid separator 9 separates the precipates to send it to the oxidizer 10, and the filtrate to send to the cleaning apparatus 6. In the oxidizer 10, water is added to the precipitates making it slurry, then sulfuric acid is added to the slurry adjusting its pH to 2 to 4, the slurry is then oxidized by air under the pressure of 3 to 5kg/cm2 to modify CaSO3 to CaSO4 which is separated by the liquid-solid separator. The filtrate is treated in the thermal decomposer 12 at 70 to 200°C to modify amino compounds ino NH4 salts, which is adjusted to pH 10 or greaer in the discharger 13, thereby discharging NH3.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297178A JPS54107467A (en) | 1978-02-09 | 1978-02-09 | Simultaneous removal of nitrogen oxide and sulfur oxide in burnt waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297178A JPS54107467A (en) | 1978-02-09 | 1978-02-09 | Simultaneous removal of nitrogen oxide and sulfur oxide in burnt waste gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54107467A true JPS54107467A (en) | 1979-08-23 |
Family
ID=11820107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1297178A Pending JPS54107467A (en) | 1978-02-09 | 1978-02-09 | Simultaneous removal of nitrogen oxide and sulfur oxide in burnt waste gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54107467A (en) |
-
1978
- 1978-02-09 JP JP1297178A patent/JPS54107467A/en active Pending
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