CN215916986U

CN215916986U - High-efficient ammonia injection grid device of SCR denitration

Info

Publication number: CN215916986U
Application number: CN202122484439.4U
Authority: CN
Inventors: 丛华威; 孙金锂; 柳倩倩
Original assignee: Weihai Zhengda Environment Equipment Co ltd
Current assignee: Weihai Zhengda Environment Equipment Co ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-03-01
Anticipated expiration: 2031-10-15

Abstract

The utility model relates to an SCR denitration high-efficiency ammonia spraying grid device, which solves the technical problems of uneven ammonia distribution and uneven ammonia and flue gas containing oxynitride of the existing ammonia spraying grid. The method can be widely applied to the field of SCR denitration.

Description

High-efficient ammonia injection grid device of SCR denitration

Technical Field

The utility model relates to the field of SCR denitration, in particular to an efficient ammonia injection grid device for SCR denitration.

Background

In the SCR denitration process, because of the design of anterior segment ammonia injection grid device is unreasonable, ammonia and nitrous oxide's former flue gas can not the homogeneous mixing, lead to the denitration effect not obvious, the ammonia use amount increases, the ammonia escape volume increases the scheduling problem. The uneven mixing leads to the increase of ammonia escape, viscous substances such as ammonium bisulfate and the like are easily generated at the downstream, and the operation of a boiler and the service life of the boiler are seriously influenced. Affecting the environment and wasting the raw materials for preparing ammonia.

Disclosure of Invention

The utility model provides an SCR denitration high-efficiency ammonia injection grid device which is high in removal rate and low in operation cost, and aims to solve the technical problems that ammonia gas in the existing ammonia injection grid is not uniformly distributed and ammonia gas and flue gas containing oxynitride are not uniformly mixed.

The utility model provides an efficient ammonia spraying grid device for SCR denitration, which is provided with an ammonia gas distribution pipeline, an ammonia gas conveying pipeline and a uniform distributor, wherein the ammonia gas distribution pipeline is connected with the ammonia gas conveying pipeline, the uniform distributor is uniformly distributed on the ammonia gas conveying pipeline, ammonia spraying circular holes are distributed on the uniform distributor, and a turbulent flow nozzle is arranged at the lower end of the uniform distributor.

Preferably, the ammonia gas distribution pipeline is connected with two adjacent conveying pipelines, the ammonia gas distribution pipeline is provided with an elbow, and the two adjacent ammonia gas conveying pipelines are communicated with each other.

Preferably, a partition baffle is arranged in the middle of each ammonia gas conveying pipeline to partition the ammonia gas conveying pipeline into two sections, and each section of ammonia gas conveying pipeline is communicated with the ammonia gas conveying pipeline close to the same side of the upper part and is respectively connected with an ammonia gas distribution pipeline.

Preferably, the ammonia gas distribution pipeline is connected with the outer pipeline through a flange.

Preferably, the turbulent flow nozzle is a spiral nozzle, and the turbulent flow nozzle is connected with the uniform distributor through threads.

Preferably, the ammonia gas conveying pipeline is provided with angle steel, and the angle steel is connected with support angle steel on the flue wall plate of the SCR denitration system through bolts.

The utility model has the beneficial effects that:

according to the utility model, the partition baffle is arranged in the ammonia gas conveying pipeline, the path of ammonia gas is shorter under the action of the partition baffle, the balance of gas amount in each pipeline is ensured, the uneven distribution of ammonia gas caused by the overlong conveying pipeline is prevented, and the ammonia gas is ensured to uniformly enter the uniform distributor; the spray holes are arranged at different angles around the uniform distributor, and the ammonia sprayed from the spray holes is uniformly sprayed around the uniform distributor to carry out all-around spraying, so that the coverage area of the ammonia is greatly increased, the flue gas can not escape everywhere, and the flue gas must be contacted with the ammonia, and the reaction efficiency is improved; the spiral ammonia gas turbulence nozzles are arranged at the lower end of the uniform distributor, so that ammonia gas and flue gas are further fully mixed, the utilization rate of ammonia gas is improved, the reaction efficiency is improved, the escape amount of ammonia gas is reduced, and the maintenance frequency of downstream equipment is reduced; the whole SCR denitration high-efficiency ammonia spraying grid device is overall observed, the mixing effect and the reaction efficiency are improved, meanwhile, raw materials required for ammonia production are saved, the power consumption required for ammonia production is saved, the pollution of ammonia escape to the environment is reduced, the health of field operators is guaranteed, and the national call for energy conservation and emission reduction is responded.

Drawings

FIG. 1 is a front view of the overall structure of the present invention;

FIG. 2 is a top view of the overall structure of the present invention;

FIG. 3 is an enlarged structure of the ammonia gas uniform distributor and the turbulent nozzle of the present invention.

Description of the symbols of the drawings:

1. an ammonia gas distribution line; 2. an ammonia gas delivery line; 3. a uniform distributor; 4. a turbulent flow nozzle; 5. angle steel; 6. a partition baffle plate; 7. a connecting flange; 8. the reactor inlet flue.

Detailed Description

The present invention is further described below with reference to the drawings and examples so that those skilled in the art can easily practice the present invention.

Example (b): as shown in fig. 1-3, the ammonia distributor is provided with an ammonia gas distribution pipeline 1, an ammonia gas conveying pipeline 2, a uniform distributor 3, a turbulent flow nozzle 4, angle steel 5, a partition baffle 6 and a connecting flange 7.

The ammonia gas distribution pipeline 1 is connected with an ammonia gas source pipeline through a connecting flange 7, so that the ammonia gas distribution pipeline is convenient to disassemble and assemble, and ammonia gas from the ammonia gas source pipeline is distributed to the ammonia gas conveying pipeline 2 through the ammonia gas distribution pipeline 1. The ammonia gas distribution pipeline 1 and the ammonia gas delivery pipeline 2 are butt-welded. A partition baffle 6 is arranged in the middle of each ammonia gas conveying pipeline 2 to partition the ammonia gas conveying pipeline 2 into a left section and a right section, the left section and the right section of ammonia gas conveying pipeline 2 are respectively communicated with the ammonia gas conveying pipeline 2 close to the upper part at the same side, a group of ammonia gas conveying pipelines is pairwise connected with an ammonia gas distribution pipeline 1, and the ammonia gas distribution pipeline 1 comprises an elbow to realize the intercommunication of two adjacent pipelines.

Ammonia conveying line 2 and the 3 group of a plurality of uniform distributor are formed to the welding, and a vortex nozzle 4 is connected to every uniform distributor 3 other end, and uniform distributor 3 and vortex nozzle 4 adopt the internal thread to connect. Set up in the ammonia conveying pipeline 2 and cut off baffle 6, the ammonia route is shorter under the effect that cuts off baffle 6, guarantees that the tolerance in each pipe is balanced, prevents to lead to the ammonia to distribute inhomogeneously because of the conveying pipeline overlength, guarantees in the even entering uniform distributor 3 of ammonia, has bored the ammonia spraying round hole that the equidirectional uniform distribution of several has gone up in the uniform distributor 3. Ammonia sprays reactor inlet flue 8 in through the several round hole of equipartition on uniform distributor 3 under uniform distributor 3's malleation effect, carry out intensive mixing with NOx's flue gas in reactor inlet flue 8, partial ammonia gets into in vortex nozzle 4 of lower part simultaneously, spiral nozzle is adopted to 4 lower extremes of vortex nozzle, spiral nozzle through threaded connection to with the internal thread connector on, it is irregular through vortex nozzle spun ammonia flow field, play the vortex effect, ammonia and flue gas's intensive mixing has further been guaranteed, get into the SCR reactor after mixing and react.

The SCR denitration system flue wall plate is connected with a support angle steel bolt on the SCR denitration system flue wall plate through an angle steel 5.

The above description is only for the purpose of illustrating preferred embodiments of the present invention and is not to be construed as limiting the present invention, and it is apparent to those skilled in the art that various modifications and variations can be made in the present invention. All changes, equivalents, modifications and the like which come within the scope of the utility model as defined by the appended claims are intended to be embraced therein.

Claims

1. The utility model provides a high-efficient ammonia injection grid device of SCR denitration, its is equipped with ammonia distribution pipeline, ammonia conveying line and uniform distributor, ammonia distribution pipeline with ammonia conveying line connects, ammonia conveying line equipartition has uniform distributor, the last distribution of uniform distributor has the ammonia hole of spouting, characterized by, the uniform distributor lower extreme is equipped with the vortex nozzle.

2. The SCR denitration efficient ammonia injection grid device as claimed in claim 1, wherein the ammonia gas distribution pipeline is connected with two adjacent conveying pipelines, the ammonia gas distribution pipeline is provided with an elbow, and the two adjacent ammonia gas conveying pipelines are communicated with each other.

3. The SCR denitration efficient ammonia injection grid device as claimed in claim 2, wherein a partition baffle is arranged in the middle of each ammonia gas conveying pipeline to divide the ammonia gas conveying pipeline into two sections, and each section of ammonia gas conveying pipeline is communicated with the adjacent ammonia gas conveying pipeline on the same side of the upper part and is connected with an ammonia gas distribution pipeline.

4. The SCR denitration efficient ammonia injection grid device as claimed in claim 1, wherein the ammonia gas distribution pipeline is connected with an outer pipeline through a flange.

5. The SCR denitration efficient ammonia injection grid device as claimed in claim 1, wherein the turbulent flow nozzle is a spiral nozzle, and the turbulent flow nozzle is connected with the uniform distributor through threads.

6. The SCR denitration efficient ammonia injection grid device as claimed in claim 1, wherein the ammonia gas conveying pipeline is provided with angle steel, and the angle steel is connected with support angle steel on a flue wall plate of the SCR denitration system through bolts.