CN210964555U

CN210964555U - Novel optimize ammonia injection grid

Info

Publication number: CN210964555U
Application number: CN201921777323.6U
Authority: CN
Inventors: 张强; 谭后章; 米建文; 甄志广; 景国峰; 李相东; 周静; 杨祖望; 高飞; 孟杰; 朱胜宝
Original assignee: Shijiazhuang Liangcun Thermal Power Co ltd
Current assignee: Shijiazhuang Liangcun Thermal Power Co ltd
Priority date: 2019-10-22
Filing date: 2019-10-22
Publication date: 2020-07-10
Anticipated expiration: 2029-10-22

Abstract

The utility model discloses a novel optimized ammonia spraying grid, which comprises a rear conveying pipe and a front conveying pipe, wherein the tail ends of the rear conveying pipe and the front conveying pipe are respectively provided with a rear communicating pipe and a front communicating pipe, the rear conveying pipe is communicated with the rear communicating pipe, the front conveying pipe is communicated with the front communicating pipe, the upper surfaces of the rear connecting pipe and the front connecting pipe are respectively connected with an ammonia spraying pipe through connecting pipes, and the ammonia spraying pipe is provided with an ammonia spraying head; the utility model discloses utilize back control valve and preceding control valve to control respectively after communicating pipe and preceding communicating pipe spout ammonia volume, divide into two parts through spouting the ammonia pipe, make every spout ammonia head homoenergetic blowout equivalent ammonia, set into alternately relative form through spouting the ammonia head in addition, help enlarging the effective area that the ammonia sprayed, make the reaction of ammonia and nitre more even, improve denitration efficiency. The utility model is suitable for an ammonia process is spouted in power plant uses.

Description

Novel optimize ammonia injection grid

Technical Field

The utility model relates to a power plant's SCR denitration technical field specifically is a novel optimize ammonia injection grid.

Background

To prevent excessive NO generation after coal combustion in the boiler_xPollutes the environment and needs to carry out denitration treatment on the coal. The denitration treatment comprises denitration before combustion, denitration in the combustion process and denitration after combustion, the sprayed ammonia is matched with the actual requirements of all denitration areas, and the control of the ammonia spraying flow of all the areas is very important. At present, the ammonia spraying amount of the branch pipe of the ammonia spraying grid of the power plant is not uniform, the uniformity distribution of flue gas and ammonia gas when entering a catalyst layer cannot be ensured, and the denitration efficiency is poor. Although the flow of each branch pipe can be controlled by adjusting the valve opening of different ammonia spraying branch pipes, the ammonia spraying amount of different nozzles on the same ammonia spraying branch pipe cannot be adjusted, so that the due effect cannot be achieved after the ammonia spraying adjustment.

The regional design of present power plant's ammonia injection grid only can be adjusted in flue width single direction, nevertheless spout the ammonia bleeder and be leading to long isodiametric, 5 spouts on the same bleeder spout ammonia volume inhomogeneous, it is inhomogeneous to spout ammonia volume on the feasible front and back direction, flue gas and ammonia's homogeneity distributes when being difficult to guarantee to get into the catalyst layer, and then can't guarantee the denitration effect, consequently, the urgent need for a neotype ammonia injection grid, can be even equivalent spout ammonia, make the ammonia fully with the nitre mixed reaction in the flue gas, the efficiency of denitration is improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel optimize ammonia injection grid to the spout on the current power plant ammonia injection grid that provides in solving above-mentioned background art spouts ammonia volume inhomogeneous, makes and spouts ammonia volume inhomogeneous on the front and back direction, flue gas and ammonia's homogeneity distribution scheduling problem when being difficult to guarantee to get into the catalyst layer.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel optimize ammonia injection grid, includes back conveyer pipe and preceding conveyer pipe, back conveyer pipe with the end of preceding conveyer pipe is provided with back communicating pipe and preceding communicating pipe respectively, just back conveyer pipe with back communicating pipe communicates with each other, preceding conveyer pipe with preceding communicating pipe communicates with each other, back communicating pipe with the upper surface of preceding communicating pipe is connected with the ammonia injection pipe through the connecting pipe respectively, be provided with the ammonia injection head on the ammonia injection pipe.

Preferably, the ammonia spraying heads are provided with a plurality of ammonia spraying heads, and every two ammonia spraying heads are distributed in a Y shape in a crossed and corresponding mode.

Preferably, the rear delivery pipe is provided with a rear control valve.

Preferably, the front conveying pipe is provided with a front control valve.

Preferably, the ammonia spraying pipes are provided with a plurality of channels and are uniformly distributed in the horizontal direction at equal intervals.

Preferably, the interior of the ammonia injection pipe is divided into two parts by a partition plate at equal intervals, wherein one part is communicated with the rear communicating pipe, and the other part is communicated with the front communicating pipe.

Preferably, the whole device is made of stainless steel.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses simple structure, the maintenance of easily disassembling, utilize back control valve and preceding control valve to control respectively after communicating pipe and preceding communicating pipe spout ammonia volume, divide into two parts through spouting the ammonia pipe, make every spout ammonia head homoenergetic blowout equivalent ammonia, set to cross relative form through spouting the ammonia head in addition, help enlarging the effective area that the ammonia sprayed, make the ammonia more even with the reaction of nitre, do benefit to improvement denitration efficiency.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of the internal structure of the ammonia injection pipe of the present invention;

fig. 3 is a left side view of fig. 2.

In the figure: 1. a rear conveying pipe; 2. a front delivery pipe; 3. a rear communicating pipe; 4. a front communicating pipe; 5. a rear control valve; 6. a front control valve; 7. a connecting pipe; 8. an ammonia spraying pipe; 801. a partition plate; 9. and an ammonia spraying head.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a novel optimize ammonia injection grid, including back conveyer pipe 1 and preceding conveyer pipe 2, back conveyer pipe 1 and preceding conveyer pipe 2 are L forms, and extend side by side, the end of back conveyer pipe 1 and preceding conveyer pipe 2 is provided with back communicating pipe 3 and preceding communicating pipe 4 respectively, and back conveyer pipe 1 communicates with each other with back communicating pipe 3, preceding conveyer pipe 2 communicates with each other with preceding communicating pipe 4, the upper surface of back communicating pipe 3 and preceding communicating pipe 4 is connected with ammonia injection pipe 8 through connecting pipe 7 respectively, be provided with on the ammonia injection pipe 8 and spout ammonia head 9.

Specifically, it has a plurality of to spout ammonia head 9, and every two cross correspondences are Y style of calligraphy and distribute, so set up, make the effective blowout area of spouting ammonia head 9 more extensive, make spun ammonia can with the abundant mixing reaction of nitre, improve denitration efficiency.

Specifically, be provided with back control valve 5 on the back conveyer pipe 1, can control the entering volume of the interior ammonia of communicating pipe 3 after through setting up back control valve 5, preceding conveyer pipe 2 is last to be provided with preceding control valve 6, the entering volume of the interior ammonia of communicating pipe 4 before can controlling through control valve 6 before setting up, make preceding communicating pipe 4 with the back communicating pipe 3 in the ammonia equivalent, and then make the ammonia equivalent of 9 spun ammonia of ammonia spraying head, make the concentration of spun ammonia more even, improve the combination efficiency of ammonia and nitre greatly.

Specifically, spout ammonia pipe 8 and have a plurality of ways, and equidistance horizontal evenly distributed, so set up, make and spout equidistance evenly distributed between the ammonia pipe 8, and then make and spout 9 equidistance evenly distributed of ammonia head, make every ammonia head 9 spun ammonia can be even.

Specifically, the interior of the ammonia injection pipe 8 is equidistantly divided into two parts by the partition plate 801, one part of the interior is communicated with the rear communicating pipe 3, and the other part of the interior is communicated with the front communicating pipe 4, so that the rear communicating pipe 3 and the front communicating pipe 4 can convey ammonia gas to the ammonia injection pipe 8 without interference, thereby preventing the ammonia gas from mixing in the ammonia injection pipe 8 and filling the ammonia injection pipe 8 with the ammonia gas as soon as possible.

Specifically, whole device all adopts stainless steel, so sets up, not only durable through using stainless steel, can slow down the corruption of ammonia and nitre to the device moreover to a certain extent, helps improving the service life of device.

The working principle is as follows:

when in use, ammonia gas is respectively conveyed to the rear communicating pipe 3 and the front communicating pipe 4 through the rear conveying pipe 1 and the front conveying pipe 2, the rear control valve 5 and the front control valve 6 are simultaneously adjusted, and then the amount of the ammonia gas in the rear communicating pipe 3 input by the rear conveying pipe 1 and the amount of the ammonia gas in the front communicating pipe 4 input by the front conveying pipe 2 are respectively controlled, so that the ammonia gas in the rear communicating pipe 3 and the ammonia gas in the front communicating pipe 4 can be simultaneously filled, the ammonia gas in the rear communicating pipe 3 and the ammonia gas in the front communicating pipe 4 respectively enter the ammonia spraying pipe 8 through the connecting pipe 7, because the ammonia gas in the rear communicating pipe 3 and the ammonia gas in the front communicating pipe 4 are equal, and the inside of the ammonia spraying pipe 8 is divided into two parts by the partition plate 801, the ammonia gas is prevented from mixing in the ammonia spraying pipe 8, therefore, the two parts in the ammonia spraying pipe 8 can be simultaneously filled with the ammonia gas, the effective spraying area of the ammonia spraying head 9 is wider and more uniform, the sprayed ammonia can be fully mixed and reacted with the nitrate, the denitration efficiency is greatly improved, and the nitrated substance in the flue gas is eliminated through the full reaction of the ammonia and the nitrate, so that the denitration of the flue gas is completed.

Utilize control valve 5 and preceding control valve 6 to control the ammonia volume of leading to of communicating pipe 3 and preceding communicating pipe 4 behind respectively, spout ammonia pipe 8 through making and divide into two parts, make every spout ammonia head 9 homoenergetic spout equivalent ammonia, set to the form that the intersection is relative through spouting ammonia head 9 in addition, help enlarging the effective area that the ammonia sprayed, make the ammonia more even with the reaction of nitre, improve denitration efficiency.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel optimize ammonia injection grid which characterized in that: including back conveyer pipe (1) and preceding conveyer pipe (2), back conveyer pipe (1) with the end of preceding conveyer pipe (2) is provided with respectively after (3) and preceding (4) communicating pipe, just back conveyer pipe (1) with back (3) communicate with each other, preceding conveyer pipe (2) with preceding (4) communicating pipe communicate with each other, after (3) communicating pipe with the upper surface of preceding (4) communicating pipe is connected with ammonia injection pipe (8) through connecting pipe (7) respectively, be provided with on ammonia injection pipe (8) and spout ammonia head (9).

2. The new and optimized ammonia injection grid as set forth in claim 1, wherein: the ammonia spraying heads (9) are provided with a plurality of ammonia spraying heads, and every two ammonia spraying heads are distributed in a Y-shaped manner in a crossed and corresponding manner.

3. The new and optimized ammonia injection grid as set forth in claim 1, wherein: and a rear control valve (5) is arranged on the rear conveying pipe (1).

4. The new and optimized ammonia injection grid as set forth in claim 1, wherein: the front conveying pipe (2) is provided with a front control valve (6).

5. The new and optimized ammonia injection grid as set forth in claim 1, wherein: the ammonia spraying pipe (8) is provided with a plurality of channels, and the channels are evenly distributed in the horizontal direction at equal intervals.

6. The new and optimized ammonia injection grid as set forth in claim 1, wherein: the interior of the ammonia injection pipe (8) is equidistantly divided into two parts by a partition plate (801), wherein one part is communicated with the rear communicating pipe (3), and the other part is communicated with the front communicating pipe (4).

7. The new and optimized ammonia injection grid as set forth in claim 1, wherein: the whole device is made of stainless steel.