JPS5499072A - Wet treating method for exhaust combustion gas - Google Patents
Wet treating method for exhaust combustion gasInfo
- Publication number
- JPS5499072A JPS5499072A JP528378A JP528378A JPS5499072A JP S5499072 A JPS5499072 A JP S5499072A JP 528378 A JP528378 A JP 528378A JP 528378 A JP528378 A JP 528378A JP S5499072 A JPS5499072 A JP S5499072A
- Authority
- JP
- Japan
- Prior art keywords
- soln
- absorbing
- gas
- oxidized
- nox
- 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
- 239000000567 combustion gas Substances 0.000 title abstract 3
- 238000000034 method Methods 0.000 title 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 6
- 239000007789 gas Substances 0.000 abstract 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 3
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 3
- 229910052602 gypsum Inorganic materials 0.000 abstract 3
- 239000010440 gypsum Substances 0.000 abstract 3
- 239000004571 lime Substances 0.000 abstract 3
- 238000001556 precipitation Methods 0.000 abstract 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract 2
- 239000000706 filtrate Substances 0.000 abstract 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate group Chemical group S(=O)(=O)([O-])[O-] QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical group OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 238000005115 demineralization Methods 0.000 abstract 1
- 230000002328 demineralizing effect Effects 0.000 abstract 1
- 239000003595 mist Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 abstract 1
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
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
Abstract
PURPOSE: To conduct wet treatment of exhaust gas at constant operation and at a low cost, by adding lime to the soln. contg. NaOH and having been used for absorbing and removing SOx, NOx contained in exhaust combustion gas in order to separate sulfate group as gypsum, and by reutilizing the soln. liberated from gypsum once again for the treatement.
CONSTITUTION: After cooled in a cooling tower 2, exhaust combustion gas from a boiler 1 is passed to an oxidizing-gas mixer 17, where most of the NOx is oxidized to NO2 by addn. of O3, however practically no SO2 is oxidized. The exhaust gas is then led to an absorption tower 4, where it is completely removed of SOx and NOx by treatment with absorbing soln. contg. NaOH and Na2SO3, it is then discharged through a mist separator 7 to the air. A portion of the absorbing soln., which is circulating, is led to an oxidation tank 10, where sulfite group contained in the soln. is oxidized to sulfate group with air, then to a precipitation tank using lime, where lime F is added to the slon., and resulting gypsum B is separated by a filter 24. The filtrate is liberated in a carbonate-precipitation tank 13 from residual C2+ by addn. of CO2 gas D. In demineralization unit 15, the filtrate is further removed of NaNO3, and is decomposed in a decomposition still 16 into Na2O and N2, the demineralized soln. being mixed and dissolved with Na2O in a mixer 14, and is then returned to the absorbing soln. tank 6 through the carbonate-precipitation tank 13.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP528378A JPS5499072A (en) | 1978-01-23 | 1978-01-23 | Wet treating method for exhaust combustion gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP528378A JPS5499072A (en) | 1978-01-23 | 1978-01-23 | Wet treating method for exhaust combustion gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5499072A true JPS5499072A (en) | 1979-08-04 |
Family
ID=11606902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP528378A Pending JPS5499072A (en) | 1978-01-23 | 1978-01-23 | Wet treating method for exhaust combustion gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5499072A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6196134U (en) * | 1984-11-22 | 1986-06-20 | ||
| CN105771579A (en) * | 2016-04-20 | 2016-07-20 | 北京中能诺泰节能环保技术有限责任公司 | Flue gas purification system |
-
1978
- 1978-01-23 JP JP528378A patent/JPS5499072A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6196134U (en) * | 1984-11-22 | 1986-06-20 | ||
| CN105771579A (en) * | 2016-04-20 | 2016-07-20 | 北京中能诺泰节能环保技术有限责任公司 | Flue gas purification system |
| CN105771579B (en) * | 2016-04-20 | 2018-06-29 | 北京中能诺泰节能环保技术有限责任公司 | Flue gas purification system |
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