CN217392047U - Air compression system applied to SCR denitration - Google Patents
Air compression system applied to SCR denitration Download PDFInfo
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- CN217392047U CN217392047U CN202220209608.5U CN202220209608U CN217392047U CN 217392047 U CN217392047 U CN 217392047U CN 202220209608 U CN202220209608 U CN 202220209608U CN 217392047 U CN217392047 U CN 217392047U
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Abstract
The utility model belongs to cement SCR denitration field especially relates to an air compression system for in SCR denitration, including the gas holder, the import department of gas holder passes through the pipeline and is connected with the air compressor machine, the export of gas holder is passed through the pipeline and is connected with the compressed air storage tank, the compressed air storage tank includes first compressed air storage tank, second compressed air storage tank, first compressed air storage tank passes through pipe connection to rake formula soot blower, be equipped with the heating structure on the pipeline between first compressed air storage tank and the rake formula soot blower, the heating structure is electric heater, electric heater's both ends are equipped with the pipeline that is connected, takes the valve. The electric heater is used for heating the compressed air during the startup and shutdown of the denitration system, so that the rake type soot blower can continuously run, and the possibility of catalyst blockage during the startup and shutdown of the kiln is reduced.
Description
Technical Field
The utility model belongs to cement SCR denitration field especially relates to an air compression system for in SCR denitration.
Background
The SCR denitration technology is mature in application in the electric power industry in China, and the emission of nitrogen oxides can reach below 50mg/Nm 3. Under the background of 'ultra-low emission' in the coal-electricity industry, the total emission amount of cement smoke pollutants is large, and particularly, nitrogen oxides account for 10-12% of the total emission amount of national industry. From 2017 to 2018, the 'ultralow emission' requirement that the emission concentration of nitrogen oxides in flue gas of the cement kiln is not higher than 100mg/Nm3 is successively provided by Jiangsu province and Zheng Zhou city. The national environmental protection requirement is becoming more and more strict, the cement industry faces huge pressure on emission reduction of nitrogen oxides, and further tightening of emission standards is a big trend of future development.
At present, the denitration technology SCR in the cement industry is a mainstream technology, the main principle of the technology is to lead flue gas out from an outlet of a preheating separator C1 of a cement plant, lead the flue gas into a newly-built SCR denitration reactor, and send the flue gas back to an inlet flue of a waste heat boiler after the treatment of the reactor, so that the aim of removing nitrogen oxides in the flue gas is fulfilled.
The stable operation of the rake type soot blower needs to provide compressed air with proper temperature, so in the past project, the compressed air generated by an air compressor is heated by utilizing the waste heat of flue gas after passing through an air storage tank, namely, the compressed air enters an air preheater for preheating to enable the temperature of the flue gas to reach about 200 ℃, and then the compressed air is blown to a catalyst by the rake type soot blower.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a be applied to air compression system in SCR denitration, including the gas holder, the import department of gas holder passes through the pipeline and is connected with the air compressor machine, the export of gas holder is passed through the pipeline and is connected with the compressed air storage tank, the compressed air storage tank includes first compressed air storage tank, second compressed air storage tank, first compressed air storage tank passes through pipe connection to the harrow formula soot blower, be equipped with heating structure on the pipeline between first compressed air storage tank and the harrow formula soot blower.
Further, the heating structure is an electric heater.
Furthermore, two ends of the electric heater are provided with pipelines with valves and connected with each other.
Furthermore, a C-stage filter, a T-stage filter, a cold dryer and an A-stage filter are sequentially arranged on a pipeline connected with the second compressed air storage tank and the air storage tank.
And further, the second compressed air storage tank respectively enters a denitration system spray gun, an acoustic wave soot blowing system and a reactor area instrument gas and acoustic wave soot blowing system for spraying and cooling.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model adds a bypass on the compressed air pipeline before entering the air preheater after the air storage tank, introduces the electric heater, ensures that the rake type soot blower can still stably run in the process of starting and stopping the furnace, and the electric heater is used for heating the compressed air during the period of starting and stopping the furnace by the denitration system, so that the rake type soot blower can continuously run, thereby reducing the possibility of catalyst blockage during the starting and stopping of the furnace; the electric heater heats the compressed air, so that the rake type soot blower continuously operates, the whole system can operate more stably, and the probability of catalyst blockage is reduced. And the electric heater does not operate continuously, and does not increase power consumption too much, so the integral structure is simple, the popularization is convenient, and the application prospect is good.
Drawings
Fig. 1 is a schematic diagram of a system connection according to an embodiment of the present invention.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
An air compression system applied to SCR denitration comprises an air storage tank 1, wherein the inlet of the air storage tank 1 is connected with an air compressor 9 through a pipeline, the outlet of the air storage tank 1 is connected with a compressed air storage tank through a pipeline, the compressed air storage tank comprises a first compressed air storage tank 2 and a second compressed air storage tank 3, the first compressed air storage tank 2 is connected to the rake type soot blower through a pipeline, a heating structure 4 is arranged on the pipeline between the first compressed air storage tank 2 and the rake type soot blower, the heating structure is an electric heater, two ends of the electric heater are provided with pipelines which are connected and provided with valves, after passing through the electric heater, the compressed air is stabilized between 250 ℃ and 300 ℃, so that the rake type soot blower can continuously blow soot, the total pressure difference of an inlet flue and an outlet flue of the reactor is stable and is continuously controlled within 200Pa, and the operation period of the catalyst is prolonged. If the temperature of the compressed air reaches the standard after heat exchange through the flue gas, the compressed air is directly conveyed into the rake type soot blower through the pipeline with the valve and connected with the two ends of the electric heater, and during implementation, a temperature sensor can be installed in front of the valve, so that the temperature reaches the standard, the valve is automatically opened, the electric heater is automatically closed, and automation is realized.
The utility model adds a bypass on the compressed air pipeline before entering the air preheater after the air storage tank, introduces the electric heater, ensures that the rake type soot blower can still stably run in the process of starting and stopping the furnace, uses the electric heater to heat the compressed air during the period of starting and stopping the furnace by the denitration system, ensures that the rake type soot blower can continuously run, and reduces the possibility of catalyst blockage when the furnace is started and stopped; the electric heater heats the compressed air, so that the rake type soot blower continuously operates, the whole system can operate more stably, and the probability of catalyst blockage is reduced. And the electric heater does not operate continuously, and does not increase power consumption too much, so the whole structure is simple, the popularization is convenient, and the application prospect is good.
And a C-stage filter 5, a T-stage filter 6, a cold dryer 7 and an A-stage filter 8 are sequentially arranged on a pipeline connecting the second compressed air storage tank 3 and the air storage tank 1. And the second compressed air storage tank respectively enters a denitration system spray gun, an acoustic wave soot blowing system and a reactor area instrument gas and acoustic wave soot blowing system for spraying and cooling.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The air compression system applied to SCR denitration comprises an air storage tank, wherein the inlet of the air storage tank is connected with an air compressor through a pipeline, the outlet of the air storage tank is connected with a compressed air storage tank through a pipeline, the compressed air storage tank comprises a first compressed air storage tank and a second compressed air storage tank, the first compressed air storage tank is connected to a rake type soot blower through a pipeline, and a heating structure is arranged on the pipeline between the first compressed air storage tank and the rake type soot blower.
2. The air compression system applied to SCR denitration of claim 1, wherein the heating structure is an electric heater.
3. The air compression system applied to SCR denitration of claim 2, wherein two ends of the electric heater are provided with connected pipelines with valves.
4. The air compression system applied to SCR denitration of claim 1, wherein a C-stage filter, a T-stage filter, a cold dryer and an A-stage filter are sequentially arranged on a pipeline connecting the second compressed air storage tank and the air storage tank.
5. The air compression system applied to SCR denitration of claim 1, wherein the second compressed air storage tank is respectively connected to a denitration system spray gun, an acoustic wave soot blowing system, a reactor area instrument air and an acoustic wave soot blowing system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220209608.5U CN217392047U (en) | 2022-01-26 | 2022-01-26 | Air compression system applied to SCR denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220209608.5U CN217392047U (en) | 2022-01-26 | 2022-01-26 | Air compression system applied to SCR denitration |
Publications (1)
| Publication Number | Publication Date |
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| CN217392047U true CN217392047U (en) | 2022-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220209608.5U Active CN217392047U (en) | 2022-01-26 | 2022-01-26 | Air compression system applied to SCR denitration |
Country Status (1)
| Country | Link |
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| CN (1) | CN217392047U (en) |
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2022
- 2022-01-26 CN CN202220209608.5U patent/CN217392047U/en active Active
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