JPS54126666A - Removing method for ammonia in exhaust-gas denitrating process - Google Patents
Removing method for ammonia in exhaust-gas denitrating processInfo
- Publication number
- JPS54126666A JPS54126666A JP2020578A JP2020578A JPS54126666A JP S54126666 A JPS54126666 A JP S54126666A JP 2020578 A JP2020578 A JP 2020578A JP 2020578 A JP2020578 A JP 2020578A JP S54126666 A JPS54126666 A JP S54126666A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- gas
- ammonium salt
- tower
- soln
- 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)
Abstract
PURPOSE: To decrease NH3 consumption and to reduce exhaust-gas-disposing cost in removal of unreacted NH3 in exhaust-gas-denitrating process, by decomposing ammonium salt formed by fixing NH3 with acidic gas to form NH3, and by reutilizing the NH3 in denitration.
CONSTITUTION: NH3 is injected into combustion furnace 1 exhaust gas contg. NOx etc., so as to make the NOx inactive at 870W1,095°C in a temp.-lowering tower. Excess NH3 reacts with acidic gas such as HCl etc. contained in the exhaust gas to form ammonium salt, and is led through a heat exchanger 3 to a washing tower 5, where it is washed with water to form an aq. soln. The soln. is delivered through an exhaust water tank 6 to an evaporation-to-dryness apparatus 10, where ammonium chloride C etc. is recovered. The ammonium salt is heated to 300W500°C and is decomposed in a vaporizer 11 packed with solid CaO etc. to form NH3 which is reutilized. The acidic gas is neutralyzed with CaO etc. The exhaust gas flowing out of the washing tower 5 is sent through a moisture-decreasing tower 7, dust collector 8 to a chimney 4. NH3 consumption in this process is very little so that replenishment of NH3 is also very little, hence exhaust-gas-disposing cost is reduced.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020578A JPS54126666A (en) | 1978-02-22 | 1978-02-22 | Removing method for ammonia in exhaust-gas denitrating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020578A JPS54126666A (en) | 1978-02-22 | 1978-02-22 | Removing method for ammonia in exhaust-gas denitrating process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54126666A true JPS54126666A (en) | 1979-10-02 |
Family
ID=12020657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2020578A Pending JPS54126666A (en) | 1978-02-22 | 1978-02-22 | Removing method for ammonia in exhaust-gas denitrating process |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54126666A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954671A (en) * | 2012-11-27 | 2013-03-06 | 湖北双环科技股份有限公司 | Method for improving production capacity of combined-soda dry ammonium furnace |
| CN109111009A (en) * | 2018-09-30 | 2019-01-01 | 杭州天蓝净环保科技有限公司 | A kind of desulfurization wastewater technique of zero discharge and device |
| CN112058058A (en) * | 2020-09-02 | 2020-12-11 | 北京金隅琉水环保科技有限公司 | Recovery and circulation system for escaped ammonia in cement kiln ammonia process denitration tail gas and control method thereof |
-
1978
- 1978-02-22 JP JP2020578A patent/JPS54126666A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954671A (en) * | 2012-11-27 | 2013-03-06 | 湖北双环科技股份有限公司 | Method for improving production capacity of combined-soda dry ammonium furnace |
| CN109111009A (en) * | 2018-09-30 | 2019-01-01 | 杭州天蓝净环保科技有限公司 | A kind of desulfurization wastewater technique of zero discharge and device |
| CN112058058A (en) * | 2020-09-02 | 2020-12-11 | 北京金隅琉水环保科技有限公司 | Recovery and circulation system for escaped ammonia in cement kiln ammonia process denitration tail gas and control method thereof |
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