CN209271148U - A kind of flue gas cooled steam atomization spray gun suitable for SNCR method denitration - Google Patents
A kind of flue gas cooled steam atomization spray gun suitable for SNCR method denitration Download PDFInfo
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- CN209271148U CN209271148U CN201822080447.0U CN201822080447U CN209271148U CN 209271148 U CN209271148 U CN 209271148U CN 201822080447 U CN201822080447 U CN 201822080447U CN 209271148 U CN209271148 U CN 209271148U
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- spray gun
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- flue gas
- atomization
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Abstract
The utility model discloses a kind of flue gas cooled steam atomization spray guns suitable for SNCR method denitration, including spray head, barral of a gun, cooling duct, water vapour atomization air hose, spray gun cooling wind casing and spray gun solution conduit；Barral of a gun is inserted in spray gun cooling wind casing, and spray head is connected with the end of barral of a gun, and spray gun solution conduit is connected with spray head, and water vapour atomization air hose is connected with spray head, and cooling duct is connected with spray gun cooling wind casing.The SNCR denitrification spray gun is using water vapour as atomization wind, and using the neat stress after desulfurization and dedusting as cooling wind, oxygen content in flue gas, effectively avoids the gaseous state NH for wind being atomized due to spray gun and cooling wind oxidation sprays into around significant decrease spray gun3And cause to generate NOx, therefore the denitration efficiency of the spray gun is high.
Description
Technical field
The utility model belongs to circulating fluidized bed boiler selective non-catalytic reduction method denitration applied technical field, is related to one
Kind is suitable for the flue gas cooled steam atomization spray gun of SNCR method denitration.
Background technique
Currently, SNCR denitration is a kind of denitration technology of mainstream, denitration efficiency is generally 50%~80% or so.Due to
Low investment and low operating cost, SNCR denitration technology are particularly suitable for the use of Small And Medium Capacity boiler, are particularly applied to recycle stream
The synthesis good cost performance of fluidized bed boiler.
SNCR denitration technology is by amino reductive (such as ammonium hydroxide or urea liquid) solution atomization using spray gun into drop
It sprays into burner hearth or the high-temperature flue gas (850~1050 DEG C) at other positions, pyrolysis generates gaseous state NH3, do not adding catalyst
Under the conditions of, NH3With NOxSelective non-catalytic reduction reaction is carried out, by NOxIt is reduced into N2With H2O。
Core equipment one of of the spray gun as SNCR denitration system, the structure and performance of spray gun will significantly determine SNCR system
Denitration efficiency.
The angle being atomized from drop, mainly has applied to the spray gun of SNCR denitration system: mechanical atomization spray gun and sky at present
Aerosolization spray gun etc..Circulating fluidized bed boiler SNCR denitration system is especially most commonly seen with air atomization spray gun.Air atomization spray gun
Wind is generally atomized as spray gun using compressed air.
From the angle of cooling spray gun, hp fluid air, cold one are generally used applied to the spray gun of SNCR denitration system at present
Secondary wind or compressed air etc. are used as spray gun cooling wind.
Since SNCR denitrification spray gun is generally installed in the high-temperature flue gas for being exposed to 850~1050 DEG C, as atomization wind or cold
But the oxygen in the air of wind will can spray into the gaseous state NH in furnace to a certain extent under high temperature environment3Further oxidation generates
NOx, therefore influence the denitration efficiency of spray gun.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts provides a kind of suitable for the denitration of SNCR method
Flue gas cooled steam atomization spray gun, the denitration efficiency of the spray gun is high.
In order to achieve the above objectives, the flue gas cooled steam atomization described in the utility model suitable for the denitration of SNCR method is sprayed
Rifle includes spray head, barral of a gun, cooling duct, water vapour atomization air hose, spray gun cooling wind casing and spray gun solution conduit；
Barral of a gun is inserted in spray gun cooling wind casing, and spray head is connected with the end of barral of a gun, spray gun solution conduit and spray head phase
Connection, water vapour atomization air hose are connected with spray head, and cooling duct is connected with spray gun cooling wind casing.
One end of spray gun solution conduit is connected with denitrification reducing agent fluid coupler, the other end and the spray head phase of spray gun solution conduit
Connection.
One end of water vapour atomization air hose is connected with spray gun atomization blast connection, and water vapour is atomized the other end and the spray of air hose
Head is connected.
One end of cooling duct is connected with spray gun cooling wind connector, the other end and the spray gun cooling wind casing phase of cooling duct
Connection.
Valve is provided in water vapour atomization air hose, cooling duct and spray gun solution conduit.
The utility model has the following beneficial effects:
Flue gas cooled steam atomization spray gun described in the utility model suitable for the denitration of SNCR method when specific operation,
Air hose is atomized by water vapour and inputs water vapour into spray head, and denitrification reducing agent liquid is inputted into spray head by spray gun solution conduit
Body inputs the neat stress after desulfurization and dedusting by cooling duct into spray gun cooling wind casing, using water vapour as atomization wind, with
Neat stress is as cooling wind, to significantly reduce around spray gun oxygen content in flue gas, effectively avoids being atomized wind and cold due to spray gun
But the gaseous state NH that wind oxidation sprays into3And cause to generate NOx, to significantly improve NOxRemoval efficiency.In addition, it is necessary to explanation
It is that the utility model is atomized wind as spray gun using water vapour, appropriate can reduces dilution water in denitrification reducing agent solution
Consumption, structure is simple, easy to operate, and practicability is extremely strong.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Wherein, 1 it is spray head, 2 be barral of a gun, 3 be spray gun cooling wind casing, 4 be denitrification reducing agent fluid coupler, 5 is spray
Rifle atomization blast connection, 6 are spray gun cooling wind connector.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, the flue gas cooled steam atomization spray gun described in the utility model suitable for the denitration of SNCR method includes
Spray head 1, barral of a gun 2, cooling duct, water vapour atomization air hose, spray gun cooling wind casing 3 and spray gun solution conduit；Barral of a gun 2 is inserted in spray
In rifle cooling wind casing 3, spray head 1 is connected with the end of barral of a gun 2, and spray gun solution conduit is connected with spray head 1, and water vapour is atomized wind
Pipe is connected with spray head 1, and cooling duct is connected with spray gun cooling wind casing 3, wherein water vapour is atomized air hose, cooling duct
And valve is provided in spray gun solution conduit.
One end of spray gun solution conduit is connected with denitrification reducing agent fluid coupler 4, the other end and spray head 1 of spray gun solution conduit
It is connected；One end of water vapour atomization air hose is connected with spray gun atomization blast connection 5, and water vapour is atomized the other end and the spray of air hose
First 1 is connected；One end of cooling duct is connected with spray gun cooling wind connector 6, the cooling windband of the other end and spray gun of cooling duct
Pipe 3 is connected.
For the utility model when specific operation, the spray gun is atomized elegance vapor, and spray gun cooling wind is removed using desulfurization
Neat stress after dirt, therefore the oxygen content around spray gun in flue gas is lower, it is possible to prevente effectively from since spray gun is atomized wind and cooling
The gaseous state NH that wind oxidation sprays into3And cause to generate NOx, to significantly improve NOxRemoval efficiency.
In practical operation, spray gun can be designed to corresponding size according to actual needs, and spray head 1 can also be adjusted therewith
It is whole, the performance parameters such as 1 flow of spray head and operating pressure can also be changed in the case where not changing 1 appearance of spray head.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are not departing from the utility model
Principle and objective in the case where above-described embodiment can be changed in the scope of the utility model, modify, replace and
Modification.The scope of the utility model is by appended claims and its equivalent limits.
Claims (7)
1. a kind of flue gas cooled steam atomization spray gun suitable for SNCR method denitration, which is characterized in that including spray head (1), rifle
Bar (2), cooling duct, water vapour atomization air hose, spray gun cooling wind casing (3) and spray gun solution conduit；
Barral of a gun (2) is inserted in spray gun cooling wind casing (3), and spray head (1) is connected with the end of barral of a gun (2), spray gun solution conduit
It is connected with spray head (1), water vapour atomization air hose is connected with spray head (1), and cooling duct is connected with spray gun cooling wind casing (3)
It is logical.
2. the flue gas cooled steam atomization spray gun according to claim 1 suitable for the denitration of SNCR method, which is characterized in that
One end of spray gun solution conduit is connected with denitrification reducing agent fluid coupler (4), and the other end of spray gun solution conduit is connected with spray head (1)
It is logical.
3. the flue gas cooled steam atomization spray gun according to claim 1 suitable for the denitration of SNCR method, which is characterized in that
One end of water vapour atomization air hose is connected with spray gun atomization blast connection (5), and water vapour is atomized the other end and spray head (1) of air hose
It is connected.
4. the flue gas cooled steam atomization spray gun according to claim 1 suitable for the denitration of SNCR method, which is characterized in that
One end of cooling duct is connected with spray gun cooling wind connector (6), and the other end of cooling duct is connected with spray gun cooling wind casing (3)
It is logical.
5. the flue gas cooled steam atomization spray gun according to claim 1 suitable for the denitration of SNCR method, which is characterized in that
Valve is provided in water vapour atomization air hose, cooling duct and spray gun solution conduit.
6. the flue gas cooled steam atomization spray gun according to claim 1 suitable for the denitration of SNCR method, which is characterized in that
Spray gun is atomized air hose access vapor as spray gun and is atomized wind.
7. the flue gas cooled steam atomization spray gun according to claim 1 suitable for the denitration of SNCR method, which is characterized in that
Neat stress after spray gun cooling duct access desulfurization and dedusting is as spray gun cooling wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822080447.0U CN209271148U (en) | 2018-12-11 | 2018-12-11 | A kind of flue gas cooled steam atomization spray gun suitable for SNCR method denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822080447.0U CN209271148U (en) | 2018-12-11 | 2018-12-11 | A kind of flue gas cooled steam atomization spray gun suitable for SNCR method denitration |
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| CN209271148U true CN209271148U (en) | 2019-08-20 |
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| CN201822080447.0U Active CN209271148U (en) | 2018-12-11 | 2018-12-11 | A kind of flue gas cooled steam atomization spray gun suitable for SNCR method denitration |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109364712A (en) * | 2018-12-11 | 2019-02-22 | 中国华能集团清洁能源技术研究院有限公司 | A kind of flue gas cooled steam atomization spray gun suitable for SNCR method denitration |
| CN111229008A (en) * | 2020-03-20 | 2020-06-05 | 中国华能集团清洁能源技术研究院有限公司 | Adjustable pressure boosting type injection device and method for denitration of flue gas of CFB boiler |
-
2018
- 2018-12-11 CN CN201822080447.0U patent/CN209271148U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109364712A (en) * | 2018-12-11 | 2019-02-22 | 中国华能集团清洁能源技术研究院有限公司 | A kind of flue gas cooled steam atomization spray gun suitable for SNCR method denitration |
| CN109364712B (en) * | 2018-12-11 | 2024-05-28 | 中国华能集团清洁能源技术研究院有限公司 | Flue gas cooling type steam atomization spray gun suitable for SNCR (selective non-catalytic reduction) denitration |
| CN111229008A (en) * | 2020-03-20 | 2020-06-05 | 中国华能集团清洁能源技术研究院有限公司 | Adjustable pressure boosting type injection device and method for denitration of flue gas of CFB boiler |
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