CN209205045U - A kind of SCR denitration system being directly pyrolyzed urea with flue gas after gas turbine - Google Patents
A kind of SCR denitration system being directly pyrolyzed urea with flue gas after gas turbine Download PDFInfo
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- CN209205045U CN209205045U CN201821763390.8U CN201821763390U CN209205045U CN 209205045 U CN209205045 U CN 209205045U CN 201821763390 U CN201821763390 U CN 201821763390U CN 209205045 U CN209205045 U CN 209205045U
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Abstract
The utility model discloses a kind of SCR denitration systems that urea is directly pyrolyzed with flue gas after gas turbine comprising compressed air supply system, the urea supply system for providing urea liquid, the gas turbine air supply opening for flue gas, the flue for urea pyrolysis and for out of stock waste heat boiler；The flue is connected respectively at waste heat boiler with gas turbine air supply opening；Multiple spray guns are also equipped with above the flue, which is separately connected compressed air supply system and urea supply system；The flue-gas temperature conveyed in the flue is 350 DEG C -650 DEG C.The utility model directly sprays urea liquid to being pyrolyzed in flue, and SCR denitration system can be put into time, and devoting rate is big；Compared to Conventional urea pyrolysismethod, use gas turbine smoke evacuation as heat source, heat source is reliable and stable；The concentration that gas ammonia can directly be reduced, can keep gas ammonia concentration within 5%；Solves the problems such as big energy consumption, system complex, poor controllability.
Description
Technical field
The utility model relates to gas turbine SCR denitration apparatus fields, especially a kind of straight for flue gas after gas turbine
Connect the SCR denitration system of pyrolysis urea.
Background technique
In SCR denitration system, urea is generally used to need to urinate before entering catalyst as SCR denitration reducing agent
Element pyrolysis is NH3；The method of urea pyrolysis ammonia is generally divided into pyrolysismethod and Hydrolyze method, and the most commonly used is pyrolysismethods；Urine at present
The capital equipment that element pyrolysis uses is urea pyrolysis furnace, is needed by additional energy warms urea pyrolysis room to urea pyrolysis
Temperature (350 DEG C ~ 650 DEG C), then urea liquid is sprayed to urea pyrolysis room be pyrolyzed；But this method has the energy
The problems such as consumption is big, system complex, poor controllability, influences SCR denitration efficiency.
Therefore, it needs further improvement.
Utility model content
The purpose of the utility model is to provide a kind of SCR denitration systems that urea is directly pyrolyzed for flue gas after gas turbine
System, it is intended to be pyrolyzed urea liquid by the way of pyrolysis chamber in solving the existing out of stock system of SCR, cause energy consumption big, system
The technical issues of complicated and poor controllability.
In order to achieve the above object, the technical solution of the utility model are as follows: a kind of to be directly pyrolyzed with flue gas after gas turbine
The SCR denitration system of urea comprising for providing the compressed air supply system of compressed air, for providing urea liquid
Urea supply system, the gas turbine air supply opening for flue gas, the flue for urea pyrolysis and for out of stock waste heat boiler；
The flue is connected respectively at waste heat boiler with gas turbine air supply opening；Multiple spray guns are also equipped with above the flue, it should
Spray gun is separately connected compressed air supply system and urea supply system；The flue-gas temperature conveyed in the flue is 350 DEG C-
650℃。
The SCR denitration system that urea is directly pyrolyzed with flue gas after gas turbine, wherein the spray gun is provided with two
Road import, import is connect with urea supply system all the way, and another way import is connect with compressed air supply system.
The SCR denitration system that urea is directly pyrolyzed with flue gas after gas turbine, wherein set in the waste heat boiler
It is equipped with SCR reactor reserved space, and is placing SCR catalyst.
The utility model has the advantages that the utility model directly sprays urea liquid to being pyrolyzed in flue, SCR denitration system can
Investment in time, and devoting rate is big；Compared to Conventional urea pyrolysismethod, use gas turbine smoke evacuation as heat source, heat source is reliable and stable；
The concentration that gas ammonia can directly be reduced, can keep gas ammonia concentration within 5%；Solves energy consumption big, system complex, controllable
Property it is poor the problems such as, guarantee SCR system efficiency.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the utility model.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, clear, develop simultaneously implementation referring to the drawings
The utility model is further described in example.
As shown in Figure 1, the utility model discloses a kind of SCR denitration systems for being directly pyrolyzed urea with flue gas after gas turbine
System comprising for provide the compressed air supply system 1 of compressed air, the urea supply system 2 for providing urea liquid,
Gas turbine air supply opening 3 for flue gas, the flue 4 for urea pyrolysis and for out of stock waste heat boiler 5；The flue 4
It is connected respectively at waste heat boiler 5 and gas turbine air supply opening 3；The top of the flue 4 is also equipped with multiple spray guns 6, the spray gun 6
It is separately connected compressed air supply system 1 and urea supply system 2；The flue-gas temperature conveyed in the flue 4 is 350 DEG C -650
℃。
After adopting the above structure, the utility model can select selection to be suitble to according to the temperature range of combustion turbine exhaustion
The temperature section (350 DEG C ~ 650 DEG C) of urea pyrolysis；Directly urea liquid and compressed air are cooperated urea liquid by spray gun
It is ejected into the flue that temperature section is 350 DEG C -650 DEG C, so urea liquid can be directly pyrolyzed in flue, and uses combustion
Gas-turbine smoke evacuation can directly reduce the concentration of gas ammonia, gas ammonia concentration can be kept 5% as heat source so heat source is reliable and stable
Within.Compared to Conventional urea pyrolysismethod, the SCR denitration system of the utility model can be put into time, and devoting rate is big；It solves
The problem of energy consumption is big, system complex, poor controllability, while guaranteeing SCR system efficiency.Arrow direction in figure is flue gas
Emission direction.
As for above-mentioned flue temperature range: since combustion gas gas-turbine boiler export temperature is designed by boiler producer,
The survey that can be provided by the thermodynamic computing and owner of flue gas flow, flue-gas temperature, flue thickness and flue gas heat dissipation etc.
Point temperature determines.And the utility model is preferably, and is selected by way of temperature sensor measurement.
The SCR denitration system that urea is directly pyrolyzed with flue gas after gas turbine, wherein the spray gun 6 is provided with
Two-way import, import is connect with urea supply system 2 all the way, and another way import is connect with compressed air supply system 1, passes through spray
Urea liquid is atomized by the strength of rifle, is then mixed with the flue gas in flue, since flue-gas temperature is in urea pyrolysis temperature
In range, pyrolysis is NH3 after urea liquid enters flue, as flue gas enters catalyst section reaction.
The SCR denitration system that urea is directly pyrolyzed with flue gas after gas turbine, wherein in the waste heat boiler 5
It is provided with SCR reactor reserved space 51, and is placing SCR catalyst 7.
The utility model directly sprays urea liquid to being pyrolyzed in flue, and SCR denitration system can be put into time,
And devoting rate is big；Compared to Conventional urea pyrolysismethod, use gas turbine smoke evacuation as heat source, heat source is reliable and stable；It can be direct
The concentration for reducing gas ammonia, can keep gas ammonia concentration within 5%；It solves energy consumption big, system complex, poor controllability etc. to ask
Topic guarantees SCR system efficiency.
It is preferred embodiments of the present invention above, the right of the utility model cannot be limited with this certainly
Range, it is noted that those of ordinary skill in the art, do not make the creative labor to the utility model technical side
The modification or equivalent replacement of case, without departure from the protection scope of technical solutions of the utility model.
Claims (3)
1. a kind of SCR denitration system for being directly pyrolyzed urea with flue gas after gas turbine, which is characterized in that including for providing pressure
The compressed air supply system of contracting air, the urea supply system for providing urea liquid, the gas turbine confession for flue gas
Port, for the flue of urea pyrolysis and for out of stock waste heat boiler；The flue is respectively at waste heat boiler and gas turbine
Air supply opening connection；Multiple spray guns are also equipped with above the flue, which is separately connected compressed air supply system and urine
Plain supply system；The flue-gas temperature conveyed in the flue is 350 DEG C -650 DEG C.
2. the SCR denitration system according to claim 1 for being directly pyrolyzed urea with flue gas after gas turbine, feature exist
In the spray gun is provided with two-way import, and import is connect with urea supply system all the way, and another way import and compressed air are supplied
System connection.
3. the SCR denitration system according to claim 2 for being directly pyrolyzed urea with flue gas after gas turbine, feature exist
In being provided with SCR reactor reserved space in the waste heat boiler, and placing SCR catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821763390.8U CN209205045U (en) | 2018-10-30 | 2018-10-30 | A kind of SCR denitration system being directly pyrolyzed urea with flue gas after gas turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821763390.8U CN209205045U (en) | 2018-10-30 | 2018-10-30 | A kind of SCR denitration system being directly pyrolyzed urea with flue gas after gas turbine |
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| Publication Number | Publication Date |
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| CN209205045U true CN209205045U (en) | 2019-08-06 |
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| CN201821763390.8U Active CN209205045U (en) | 2018-10-30 | 2018-10-30 | A kind of SCR denitration system being directly pyrolyzed urea with flue gas after gas turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112403251A (en) * | 2020-12-12 | 2021-02-26 | 江苏徐矿综合利用发电有限公司 | Low-load denitration system of circulating fluidized bed boiler |
-
2018
- 2018-10-30 CN CN201821763390.8U patent/CN209205045U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112403251A (en) * | 2020-12-12 | 2021-02-26 | 江苏徐矿综合利用发电有限公司 | Low-load denitration system of circulating fluidized bed boiler |
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