CN214914930U - Chain furnace denitration system - Google Patents
Chain furnace denitration system Download PDFInfo
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- CN214914930U CN214914930U CN202023160256.9U CN202023160256U CN214914930U CN 214914930 U CN214914930 U CN 214914930U CN 202023160256 U CN202023160256 U CN 202023160256U CN 214914930 U CN214914930 U CN 214914930U
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- flue gas
- hot water
- water boiler
- temperature flue
- cyclone
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Abstract
The utility model relates to a deNOx systems technical field specifically is a chain furnace deNOx systems, and it can effectively realize effectively deviating from of NOx, reaches the emission requirement, and it includes hot water boiler, hot water boiler is last to be provided with SNCR and to spout ammonia device, a serial communication port, hot water boiler's back wall top is provided with high temperature flue gas pipeline, hot water boiler's boiler barrel export is provided with low temperature flue gas pipeline, high temperature flue gas pipeline with low temperature flue gas pipeline connects cyclone's flue gas import, cyclone's returning charge mouth passes through the return pipe way and connects hot water boiler's furnace, cyclone's exhanst gas outlet connects SCR reactor's entry, SCR reactor's exit linkage economizer's import, the exit linkage gas cleaning system of economizer.
Description
Technical Field
The utility model relates to a deNOx systems technical field specifically is a chain grate furnace deNOx systems.
Background
Along with the increasing importance of the country on the environmental protection, the boiler smoke emission requirement is higher and higher, and the removal of NOx in the smoke needs to be ensured, so that the discharged smoke is separated from nitrogen oxide, and the emission requirement is met. At present, a common denitration system cannot effectively meet the high-standard denitration requirement.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that current deNOx systems can't effectively deviate from NOx, unsatisfied emission requirement, the utility model provides a chain furnace deNOx systems, it can effectively realize effectively deviating from of NOx, reaches the emission requirement.
The technical scheme is as follows: the utility model provides a chain furnace deNOx systems, its includes hot water boiler, the last SNCR that is provided with of hot water boiler spouts ammonia device, a serial communication port, hot water boiler's back wall top is provided with high temperature flue gas pipeline, hot water boiler's drum export is provided with low temperature flue gas pipeline, high temperature flue gas pipeline with low temperature flue gas pipeline connects cyclone's flue gas import, cyclone's returning charge door is connected through returning the material pipeline hot water boiler's furnace, cyclone's flue gas outlet connects the entry of SCR reactor, the exit linkage economizer's of SCR reactor import, the exit linkage flue gas cleaning system of economizer.
The device is further characterized in that the high-temperature flue gas pipeline is provided with an air adjusting door;
an ammonia spraying device is arranged at an inlet of the SCR reactor;
a flue gas bypass is arranged between the flue gas outlet of the cyclone dust collector and the outlet of the SCR reactor;
the flue gas purification system comprises a dust remover:
the coal economizer is characterized in that a return water bypass is arranged on a main return water pipeline of the hot water boiler, the coal economizer is arranged on the return water bypass, and an adjusting valve is arranged on the return water bypass.
Adopt the utility model discloses afterwards, utilize the SNCR device of former boiler, adopt the ammonia that is divided complete reaction in furnace, with the catalyst in the NOx in the flue gas process SCR reactor, under the effect of catalyst, nitrogen oxide and ammonia generate nitrogen gas, reach the purpose of deviating from nitrogen oxide, discharge after economizer cooling, gas cleaning system purify at last, reach emission standard.
Drawings
Fig. 1 is a schematic diagram of the present invention (the double-headed arrow in the figure is the smoke direction).
Detailed Description
See fig. 1, a chain furnace deNOx systems, it includes boiler 1, boiler 1 is last to be provided with SNCR and spouts ammonia device 2, boiler 1's back wall top is provided with high temperature flue gas pipeline 3, boiler 1's drum export is provided with low temperature flue gas pipeline 4, high temperature flue gas pipeline 3 and low temperature flue gas pipeline 4 connect cyclone 5's flue gas import, cyclone 5's returning charge door is through returning charge pipe 6 connection boiler 1's furnace, cyclone 5's flue gas outlet connects SCR reactor 7's entry, SCR reactor 7's exit linkage economizer 8's import, economizer 8's exit linkage flue gas cleaning system 9. The flue gas purification system 9 mainly comprises a dust remover for purifying flue gas.
The high-temperature flue gas pipeline 3 is provided with an air adjusting door for adjusting the temperature of the flue gas, so that the high-temperature flue gas and the low-temperature flue gas are mixed (about 380 ℃). An ammonia spraying device 10 is arranged at the inlet of the SCR reactor 7, and ammonia is properly sprayed at the inlet of the SCR reactor 7.
A flue gas bypass is arranged between the flue gas outlet of the cyclone dust collector and the outlet of the SCR reactor, so that the catalyst is effectively protected from being blocked and sintered when the boiler is started or debugged.
A return water bypass 12 is arranged on a main return water pipeline 11 of the hot water boiler 1, the coal economizer 8 is arranged on the return water bypass 12, and an adjusting valve 13 is arranged on the return water bypass 12.
The utility model discloses the principle as follows: the high-temperature flue gas is led out from the left side and the right side of the top of the rear wall of the boiler (about 900 ℃) and mixed with the flue gas at the outlet of the three-boiler barrel (about 160 ℃), then enters a cyclone dust collector (one separates large unburnt particles in a hearth, and two high-temperature and low-temperature flue gases are forcibly mixed), the temperature is controlled by leading out a side air damper, and the two flue gases are fully mixed (about 380 ℃) and then enter a denitration SCR reactor.
The SNCR device of the original boiler is utilized, ammonia which is completely reacted in a hearth and NOx in smoke pass through a catalyst in a reactor, ammonia is properly sprayed at the inlet of the reactor, and nitrogen oxide and ammonia generate nitrogen under the action of the catalyst, so that the aim of removing the nitrogen oxide is fulfilled.
Claims (6)
1. The utility model provides a chain furnace deNOx systems, its includes hot water boiler, the last SNCR that is provided with of hot water boiler spouts ammonia device, a serial communication port, hot water boiler's back wall top is provided with high temperature flue gas pipeline, hot water boiler's drum export is provided with low temperature flue gas pipeline, high temperature flue gas pipeline with low temperature flue gas pipeline connects cyclone's flue gas import, cyclone's returning charge door is connected through returning the material pipeline hot water boiler's furnace, cyclone's flue gas outlet connects the entry of SCR reactor, the exit linkage economizer's of SCR reactor import, the exit linkage flue gas cleaning system of economizer.
2. The denitration system of the stoker furnace as claimed in claim 1, wherein the high temperature flue gas pipeline is provided with a damper.
3. The denitration system of the stoker furnace as claimed in claim 1, wherein an ammonia spraying device is arranged at the inlet of the SCR reactor.
4. The chain grate furnace denitration system of claim 1, wherein a flue gas bypass is arranged between the flue gas outlet of the cyclone dust collector and the outlet of the SCR reactor.
5. The denitration system of the stoker furnace as claimed in claim 1, wherein the flue gas purification system comprises a deduster.
6. The denitration system of the chain grate furnace as claimed in claim 1, wherein a return water bypass is provided on a main return pipeline of the hot water boiler, the economizer is provided on the return water bypass, and the return water bypass is provided with a regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023160256.9U CN214914930U (en) | 2020-12-24 | 2020-12-24 | Chain furnace denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023160256.9U CN214914930U (en) | 2020-12-24 | 2020-12-24 | Chain furnace denitration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214914930U true CN214914930U (en) | 2021-11-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023160256.9U Active CN214914930U (en) | 2020-12-24 | 2020-12-24 | Chain furnace denitration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214914930U (en) |
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2020
- 2020-12-24 CN CN202023160256.9U patent/CN214914930U/en active Active
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