CN215654672U - Novel SNCR spray gun - Google Patents
Novel SNCR spray gun Download PDFInfo
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- CN215654672U CN215654672U CN202121492014.1U CN202121492014U CN215654672U CN 215654672 U CN215654672 U CN 215654672U CN 202121492014 U CN202121492014 U CN 202121492014U CN 215654672 U CN215654672 U CN 215654672U
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- pipe
- compressed air
- protective sleeve
- conical
- reducing agent
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Abstract
The utility model relates to a novel SNCR spray gun. In order to overcome the defects of easy abrasion and short service life of the existing SNCR spray gun, the novel SNCR spray gun comprises a reducing agent solution pipe, a compressed air pipe and a protective sleeve, wherein a conical atomizing nozzle is arranged at the front end of the reducing agent solution pipe, the front part and the conical atomizing nozzle in the reducing agent solution pipe are together extended into the compressed air pipe, a conical pipe is arranged at the front end of the protective sleeve, the conical pipe is in a horn mouth shape, the cone angle of the conical pipe is 15-45 degrees, and the air atomizing nozzle is arranged in the conical pipe. By the design, in the use process, the taper pipe plays a good protection role, furnace ash and flame do not directly contact the air atomizing nozzle, and the service life is long. The novel SNCR spray gun has the advantages of simple structure, wear resistance and long service life, and is widely applicable to various large boilers, in particular to pulverized coal boilers.
Description
Technical Field
The utility model relates to a novel SNCR spray gun.
Background
The spraying angle of the SNCR denitration spray gun is different from 10-150 degrees, the penetration capacity of a small-angle spray gun is strong, the coverage area of a large-angle spray gun is large, and the length of the spray gun and the depth of a spraying point extending into a furnace are also different. Spray guns with various angles and different positions are adopted to achieve the optimal design by combining CFD flow field simulation analysis and field measurement conditions, and the high denitration efficiency can be achieved. As the working temperature of the SNCR denitration spray gun is higher (the flue gas temperature is 850-1100 ℃), the flow rate of the flue gas is high, a large amount of dust is carried in the flue gas, and the abrasion of the spray gun is severe. In actual use, the atomization effect of the reducing agent is seriously influenced by the abrasion of the head of the spray gun, and the head of the spray gun needs to be replaced regularly.
Disclosure of Invention
The technical problem to be solved by the utility model is how to overcome the above defects in the prior art, and a novel SNCR spray gun is provided.
In order to solve the technical problem, the novel SNCR spray gun comprises a reducing agent solution pipe, a compressed air pipe and a protective sleeve, wherein a conical atomizing nozzle is arranged at the front end of the reducing agent solution pipe, the middle front part of the reducing agent solution pipe and the conical atomizing nozzle extend into the compressed air pipe together, the rear end of the reducing agent solution pipe is exposed and is connected with an outlet of an auxiliary reducing agent solution conveying pump through a pipeline, an air atomizing nozzle is arranged at the front end of the compressed air pipe, the rear end of the compressed air pipe is closed and is provided with a compressed air interface, the compressed air interface is communicated with an auxiliary compressed air buffer tank through a pipeline and an air valve, the protective sleeve is arranged on the furnace wall of an auxiliary boiler in a penetrating manner, the compressed air pipe and the reducing agent solution pipe in the compressed air pipe are arranged in the protective sleeve together in a penetrating manner, the front end of the protective sleeve extends into the auxiliary boiler, the rear end of the protective sleeve is closed and is provided with a soot blowing interface, and the soot blowing interface is communicated with an auxiliary air pipe through the pipeline and the air valve, the method is characterized in that: the front end of the protective sleeve is provided with a conical pipe which is in a horn mouth shape, the cone angle of the conical pipe is 30-90 degrees, and the air atomizing nozzle is arranged in the conical pipe. By the design, in the use process, the taper pipe plays a good protection role, furnace ash and flame do not directly contact the air atomizing nozzle, and the service life is long.
Preferably, the quick-connection type air compressor further comprises a quick-connection flange, wherein a through hole is formed in the center of the quick-connection flange, the quick-connection flange is sleeved on the compressed air pipe through the through hole, a flanging is arranged on the outer edge of the quick-connection flange and can be sleeved on the rear end of the protective sleeve to seal the rear end of the protective sleeve, a ring clamping groove is formed in the protective sleeve, a plurality of clamping jaws are uniformly hinged on the flanging, a convex part is arranged at the inner end of each clamping jaw and can be clamped into the ring clamping groove, and the quick-connection flange is detachably fixed on the rear end of the protective sleeve. Due to the design, the spray gun is convenient to replace and maintain.
Preferably, the reducing agent solution pipe is also provided with a spinning disk, and the spinning disk is close to the conical atomizing nozzle. So design, the compressed air disturbance of spinning disk reinforcing is favorable to atomizing reductant solution more.
The novel SNCR spray gun has the advantages of simple structure, wear resistance and long service life, and is widely applicable to various large boilers, in particular to pulverized coal boilers.
Drawings
The novel SNCR spray gun is further described below with reference to the accompanying drawings:
FIG. 1 is a sectional structure diagram (taken along a vertical plane passing through the axial lead of a conical atomizing nozzle) of the novel SNCR spray gun in a use state.
In the figure: 1 is a reducing agent solution pipe, 2 is a compressed air pipe, 3 is a protective sleeve, 4 is a conical atomizing nozzle, 5 is an air atomizing nozzle, 6 is a compressed air connector, 7 is a furnace wall of a matched boiler, 8 is a soot blowing air connector, 9 is a conical pipe, 10 is a quick-connection flange, 11 is a flanging, 12 is a ring clamping groove, 13 jaws, 14 is a convex part, and 15 is a spinning disk. a is the cone angle of the cone 9.
Detailed Description
The first implementation mode comprises the following steps: as shown in fig. 1, the novel SNCR spray gun comprises a reducing agent solution pipe 1, a compressed air pipe 2 and a protective sleeve 3, wherein a conical atomizing nozzle 4 is arranged at the front end of the reducing agent solution pipe 1, the front middle part of the reducing agent solution pipe 1 and the conical atomizing nozzle 4 extend into the compressed air pipe 2 together, the rear end of the reducing agent solution pipe 1 is exposed and connected with an outlet of an auxiliary reducing agent solution delivery pump (not shown) through a pipeline (not shown in the figure), an air atomizing nozzle 5 is arranged at the front end of the compressed air pipe 2, the rear end of the compressed air pipe 2 is closed and provided with a compressed air interface 6, the compressed air interface 6 is communicated with an auxiliary compressed air buffer tank (not shown in the figure) through a pipeline (not shown in the figure) and an auxiliary air valve (not shown in the figure), the protective sleeve 3 is arranged on a furnace wall 7 of a boiler in a penetrating manner, the compressed air pipe 2 and the reducing agent solution pipe 1 therein are arranged in the protective sleeve 3 together, in protective case 3 front end stretched into the adapted boiler, protective case 3 rear end was sealed to be equipped with soot blower interface 8, this soot blower interface 8 communicates with each other its characterized in that through pipeline (not shown in the figure) and pneumatic valve (not shown in the figure) and adapted tuber pipe (not shown in the figure): the front end of the protective sleeve 3 is provided with a conical pipe 9, the conical pipe 9 is in a horn mouth shape, the cone angle a is 30-90 degrees, and the air atomizing nozzle 5 is arranged in the conical pipe 9.
The quick-connection type air compressor further comprises a quick-connection flange 10, a through hole is formed in the center of the quick-connection flange 10, the quick-connection type air compressor is sleeved on the compressed air pipe 2 through the through hole, a flanging 11 is arranged on the outer edge of the quick-connection type air compressor, the flanging 11 can be sleeved on the rear end of the protective sleeve 3 to seal the rear end of the protective sleeve 3, a ring clamping groove 12 is formed in the protective sleeve 3, a plurality of clamping claws 13 are evenly hinged on the flanging 11, a convex portion 14 is arranged at the inner end of each clamping claw 13, the convex portion 14 can be clamped into the ring clamping groove, and therefore the quick-connection flange 10 can be detachably fixed on the rear end of the protective sleeve 3.
The reducing agent solution pipe 1 is also provided with a spinning disk 15, and the spinning disk 15 is close to the conical atomizing nozzle 4 and the surfaces of the two sides of the spinning disk 15 are in a spiral curved surface shape to play a role in guiding flow.
Claims (3)
1. A novel SNCR spray gun comprises a reducing agent solution pipe, a compressed air pipe and a protective sleeve, wherein a conical atomizing nozzle is arranged at the front end of the reducing agent solution pipe, the middle front part of the reducing agent solution pipe and the conical atomizing nozzle extend into the compressed air pipe together, the rear end of the reducing agent solution pipe is exposed and is connected with an outlet of an auxiliary reducing agent solution delivery pump through a pipeline, an air atomizing nozzle is arranged at the front end of the compressed air pipe, the rear end of the compressed air pipe is sealed and is provided with a compressed air interface, the compressed air interface is communicated with an auxiliary compressed air buffer tank through a pipeline and an air valve, the protective sleeve is arranged on the furnace wall of an auxiliary boiler in a penetrating manner, the compressed air pipe and the reducing agent solution pipe in the compressed air pipe are arranged in the protective sleeve in a penetrating manner together, the front end of the protective sleeve extends into the auxiliary boiler, the rear end of the protective sleeve is sealed and is provided with a soot blowing interface, the soot blowing interface is communicated with an auxiliary air pipe through the pipeline and the air valve, the method is characterized in that: the front end of the protective sleeve is provided with a conical pipe which is in a horn mouth shape, the cone angle of the conical pipe is 30-90 degrees, and the air atomizing nozzle is arranged in the conical pipe.
2. The novel SNCR spray gun according to claim 1, characterized in that: the quick-connection flange is provided with a through hole in the center, is sleeved on the compressed air pipe through the through hole, is provided with a flanging at the outer edge, can be sleeved on the rear end of the protective sleeve to seal the rear end of the protective sleeve, is provided with a ring clamping groove, is uniformly hinged with a plurality of clamping jaws, and is provided with a cam part at the inner end of each clamping jaw, and the cam part can be clamped into the ring clamping groove so as to be detachably fixed on the rear end of the protective sleeve.
3. The novel SNCR spray gun according to claim 1 or 2, characterized in that: the reducing agent solution pipe is also provided with a spinning disk, and the spinning disk is close to the conical atomizing nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121492014.1U CN215654672U (en) | 2021-07-01 | 2021-07-01 | Novel SNCR spray gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121492014.1U CN215654672U (en) | 2021-07-01 | 2021-07-01 | Novel SNCR spray gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215654672U true CN215654672U (en) | 2022-01-28 |
Family
ID=79978244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121492014.1U Active CN215654672U (en) | 2021-07-01 | 2021-07-01 | Novel SNCR spray gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215654672U (en) |
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2021
- 2021-07-01 CN CN202121492014.1U patent/CN215654672U/en active Active
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