CN216744319U - SNCR denitration rifle head protection device of circulating fluidized bed boiler - Google Patents
SNCR denitration rifle head protection device of circulating fluidized bed boiler Download PDFInfo
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- CN216744319U CN216744319U CN202123080724.6U CN202123080724U CN216744319U CN 216744319 U CN216744319 U CN 216744319U CN 202123080724 U CN202123080724 U CN 202123080724U CN 216744319 U CN216744319 U CN 216744319U
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- spray gun
- fluidized bed
- circulating fluidized
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Abstract
The utility model relates to a SNCR denitration gun head protection device of a circulating fluidized bed boiler, which comprises a boiler body, a spray gun and a spray gun protection sleeve, wherein the spray gun protection sleeve is sleeved on the spray gun, and the outer wall of the spray gun protection sleeve is provided with a plurality of supporting pieces for preventing the deformation of the spray gun protection sleeve in a surrounding manner; a layer of refractory wear-resistant plastic is laid outside the spray gun protective sleeve; the outer wall of the spray gun protection sleeve extends out of the spray gun nozzle for a certain distance so as to avoid the defect that the nozzle is directly scoured and worn by high-temperature smoke in the ammonia water atomization process. The utility model discloses the method is reasonable feasible, and design benefit, equipment safety and stability long period running reduces equipment and changes the number of times, extension equipment life, solves easy wearing and tearing that the SNCR spray gun exists in the present circulating fluidized bed boiler stove, causes technical problem such as pollution easily, to prior art, has fine market prospect and development space.
Description
Technical Field
The utility model relates to a boiler SNCR denitration rifle head auxiliary assembly field, concretely relates to circulating fluidized bed boiler SNCR denitration rifle head protection device.
Background
SNCR spray guns in a circulating fluidized bed boiler are generally designed in a horizontal flue at an outlet of a boiler hearth and a tail steering chamber, high-temperature flue gas easily erodes and abrades a spray gun head due to large flue gas flow velocity (generally designed flow velocity is more than 20 m/s), the spray gun head is replaced for 180 days due to abrasion, the amount of ammonia sprayed by the spray gun is increased due to abrasion of the SNCR spray gun head, and excessive ammonia water not only corrodes inner liners and equipment in the boiler, increases production cost, but also causes environmental pollution.
How to design a method is reasonable and feasible, the design is ingenious, the equipment is safe and stable to operate in a long period, the replacement frequency of the equipment is reduced, and the service life of the equipment is prolonged.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem such as easy wearing and tearing, cause the pollution easily that current SNCR spray gun exists in the circulating fluidized bed boiler stove, the utility model provides a circulating fluidized bed boiler SNCR denitration rifle head protection device, it is reasonable feasible to come the implementation method, design benefit, and equipment safety and stability length cycle moves, reduces equipment and changes the number of times, extension equipment life's purpose.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: a SNCR denitration gun head protection device for a circulating fluidized bed boiler comprises a boiler body, a spray gun and a spray gun protection sleeve, wherein the spray gun protection sleeve is sleeved on the spray gun, and the outer wall of the spray gun protection sleeve is provided with a plurality of supporting pieces for preventing the spray gun protection sleeve from deforming in a surrounding manner; a layer of refractory wear-resistant plastic is laid outside the spray gun protective sleeve; the outer wall of the spray gun protective sleeve extends out of the spray gun nozzle for a certain distance so as to avoid the defect that the nozzle is directly scoured and abraded by high-temperature flue gas in the ammonia water atomization process.
The boiler body includes heat preservation and pouring layer, and wherein the pouring layer is located inside the boiler body, and the heat preservation is located the boiler body outside, and heat preservation and pouring layer combination department are provided with the water wall pipe that is used for the cooling.
The support piece adopts V type claw nail, spray gun protective sleeve and support piece all adopt Cr25Ni20 material.
The refractory and wear-resistant plastic material is HF-135 refractory and wear-resistant plastic material, and the thickness of the refractory and wear-resistant plastic material is 60 mm.
The length of the protective sleeve of the spray gun extending into the furnace is 200mm, so that excessive ammonia water is prevented from directly corroding the inner lining of the furnace.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the utility model comprises a boiler body, a spray gun and a spray gun protective sleeve, wherein the spray gun protective sleeve is sleeved on the spray gun, and the outer wall of the spray gun protective sleeve is provided with a plurality of supporting pieces for preventing the deformation of the spray gun protective sleeve; the outer part of the spray gun protective sleeve is coated with a layer of refractory and wear-resistant plastic material, and by adding the spray gun protective sleeve and the supporting piece, the service life of the spray gun is greatly prolonged, and the replacement frequency is reduced;
2) phi 6V-shaped claw nails are welded outside the sleeve, and the sleeve and the claw nails are made of Cr25Ni20 which has high temperature resistance and can continuously work at 1150 ℃ without deformation;
3) the length of the sleeve extending into the furnace is 200mm, so that the technical defects that the inner lining in the furnace is directly sprayed by excessive ammonia water (when not completely atomized) and the inner lining is corroded are overcome;
4) the sleeve pipe of the spray gun extends out of the head of the spray gun by 2-3mm, the technical defect that the sleeve pipe is directly scoured and abraded by high-temperature smoke in the ammonia water atomization process is overcome, and the replacement period of the head of the spray gun is 720 days.
Drawings
FIG. 1 is a longitudinal sectional view of the structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
in the figure: 1. boiler furnace body, 2, spray gun, 3, spray gun protective case, 4, support piece, 5, fire-resistant wear-resisting plastic, 6, heat preservation, 7, pouring layer, 8, water wall pipe.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
A SNCR denitration gun head protection device for a circulating fluidized bed boiler comprises a boiler body 1, a spray gun 2 and a spray gun protection sleeve 3, wherein the spray gun protection sleeve 3 is sleeved on the spray gun 2, and a plurality of supporting pieces 4 for preventing the spray gun protection sleeve 3 from deforming are arranged on the outer wall of the spray gun protection sleeve 3 in a surrounding manner; a layer of refractory wear-resistant plastic 5 is laid outside the spray gun protective sleeve 3; the outer wall of the spray gun protective sleeve 3 extends out of the spray nozzle of the spray gun 2 for a certain distance so as to avoid the defect that the spray nozzle is directly scoured and worn by high-temperature flue gas in the ammonia water atomization process.
The basic implementation manner of the present invention can be further improved, perfected and limited on the basis: if boiler furnace 1 includes heat preservation 6 and pouring layer 7, wherein pouring layer 7 is located 1 inside of boiler furnace, and heat preservation 6 is located 1 outsides of boiler furnace, and heat preservation 6 and the 7 combination departments of pouring layer are provided with the water wall pipe 8 that is used for the cooling.
In practical application, in practical operation, the support 4 is a V-shaped claw nail, and the lance protection sleeve 3 and the support 4 are both made of Cr25Ni20, which has high temperature resistance and can continuously work at 1150 ℃ without deformation. The refractory wear-resistant plastic 5 is HF-135 refractory wear-resistant plastic, and the thickness is 60 mm; the length of the protective sleeve 3 of the spray gun extending into the furnace is 200mm, so that excessive ammonia water is prevented from directly corroding the inner lining of the furnace; the sleeve pipe of the spray gun extends out of the head of the spray gun by 2-3mm, so that the defect that the sleeve pipe is not directly scoured and abraded by high-temperature smoke in the ammonia water atomization process is overcome, and the replacement period of the head of the spray gun is 720 days.
The utility model discloses the method is reasonable feasible, and design benefit, equipment safety and stability long period running reduces equipment and changes the number of times, extension equipment life, solves easy wearing and tearing that the SNCR spray gun exists in the present circulating fluidized bed boiler stove, causes technical problem such as pollution easily, to prior art, has fine market prospect and development space.
The preferred embodiments and examples of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the embodiments and examples, and various changes can be made without departing from the concept of the present invention within the knowledge of those skilled in the art.
Claims (5)
1. The utility model provides a circulating fluidized bed boiler SNCR denitration rifle head protection device, includes boiler furnace body (1), spray gun (2) and spray gun protective case (3), and spray gun protective case (3) cover is established on spray gun (2), its characterized in that: the outer wall of the spray gun protective sleeve (3) is provided with a plurality of supporting pieces (4) for preventing the spray gun protective sleeve (3) from deforming in a surrounding manner; a layer of refractory and wear-resistant plastic material (5) is laid outside the spray gun protective sleeve (3); the outer wall of the spray gun protective sleeve (3) extends out of the spray head of the spray gun (2) for a certain distance so as to avoid the defect that the spray head is directly scoured and abraded by high-temperature flue gas in the ammonia water atomization process.
2. The SNCR denitration lance head protection device for the circulating fluidized bed boiler according to claim 1, characterized in that: boiler furnace body (1) includes heat preservation (6) and pouring layer (7), and wherein pouring layer (7) are located inside boiler furnace body (1), and heat preservation (6) are located boiler furnace body (1) outside, and heat preservation (6) and pouring layer (7) combination department are provided with water wall pipe (8) that are used for the cooling.
3. The SNCR denitration lance head protection device for the circulating fluidized bed boiler according to claim 1, characterized in that: the support piece (4) adopts V-shaped claw nails, and the spray gun protective sleeve (3) and the support piece (4) are both made of Cr25Ni 20.
4. The SNCR denitration lance head protection device for the circulating fluidized bed boiler according to claim 1, characterized in that: the refractory and wear-resistant plastic (5) is HF-135 refractory and wear-resistant plastic with the thickness of 60 mm.
5. The SNCR denitration lance head protection device for the circulating fluidized bed boiler according to claim 1, characterized in that: the length of the protective sleeve (3) of the spray gun extending into the furnace is 200mm, so that excessive ammonia water is prevented from directly corroding the inner lining of the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123080724.6U CN216744319U (en) | 2021-12-09 | 2021-12-09 | SNCR denitration rifle head protection device of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123080724.6U CN216744319U (en) | 2021-12-09 | 2021-12-09 | SNCR denitration rifle head protection device of circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216744319U true CN216744319U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123080724.6U Active CN216744319U (en) | 2021-12-09 | 2021-12-09 | SNCR denitration rifle head protection device of circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN216744319U (en) |
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2021
- 2021-12-09 CN CN202123080724.6U patent/CN216744319U/en active Active
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