CN203829901U - Ammonia spraying grid - Google Patents
Ammonia spraying grid Download PDFInfo
- Publication number
- CN203829901U CN203829901U CN201420083422.5U CN201420083422U CN203829901U CN 203829901 U CN203829901 U CN 203829901U CN 201420083422 U CN201420083422 U CN 201420083422U CN 203829901 U CN203829901 U CN 203829901U
- Authority
- CN
- China
- Prior art keywords
- ammonia
- charge
- pipeline
- spout
- spraying grid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 194
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 95
- 238000005507 spraying Methods 0.000 title claims description 37
- 239000007921 spray Substances 0.000 claims description 47
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 32
- 239000003546 flue gas Substances 0.000 claims description 32
- 239000007789 gas Substances 0.000 claims description 16
- 238000010926 purge Methods 0.000 claims description 15
- 238000007664 blowing Methods 0.000 claims description 8
- 239000000428 dust Substances 0.000 abstract description 13
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 239000000779 smoke Substances 0.000 abstract 3
- 238000010408 sweeping Methods 0.000 abstract 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model provides an ammonia injection grid, which can prevent dust in smoke from blocking a nozzle, improve the mixing uniformity of ammonia gas and smoke and improve the denitration adequacy and denitration efficiency of the smoke. The ammonia injection grid comprises a branch pipe which is communicated with a nozzle for injecting the ammonia gas, wherein the branch pipe is communicated with an ammonia gas source, and is provided with a connector for introducing sweeping gas. According to the ammonia injection grid, the branch pipe for transporting the ammonia gas to the nozzle is provided with the connector, so that even if the nozzle is blocked under the situation of low-load operation, the sweeping gas can be introduced through the connector so as to sweep the nozzle, so that the dust accumulated on the nozzle can be removed, and the blockage of the nozzle can be prevented.
Description
Technical field
The utility model relates to flue gas processing technology field, particularly relates to a kind of ammonia-spraying grid.
Background technology
In equipment for denitrifying flue gas, the diffusion of ammonia and with the mixing uniformity of flue gas be one of key factor affecting denitration efficiency.At present, in selective catalytic reduction (SCR), main spray ammonia mixing arrangement is ammonia-spraying grid (AIG).
Existing ammonia-spraying grid, is usually placed in the vertical gas pass of SCR reaction system entrance, guarantees that itself and catalyst have certain distance of mixing; But above-mentioned vertical gas pass is directly connected with the exhaust pass of economizer, the dust containing in flue gas is more, in the situation that the dust in flue gas is without tackling just process ammonia-spraying grid, very easily causes the obstruction of spout; After local spout stops up, affect the distributing homogeneity of ammonia in whole flue, cause ammonia to mix with flue gas inhomogeneous, affect denitration efficiency.
Therefore, how to look for another way, design a kind of ammonia-spraying grid, to prevent that the dust in flue gas from stopping up spout, improve the mixing uniformity of ammonia and flue gas, to improve the adequacy of denitrating flue gas, improving denitration efficiency, is the technical problem that those skilled in the art need solution at present badly.
Utility model content
The purpose of this utility model is to provide a kind of ammonia-spraying grid, can prevent that the dust in flue gas from stopping up spout, improves the mixing uniformity of ammonia and flue gas, improves adequacy and the denitration efficiency of denitrating flue gas.
For solving the problems of the technologies described above, the utility model provides a kind of ammonia-spraying grid, comprise and being in charge of of spout connection of spraying ammonia, described in be in charge of with ammonia source and be communicated with, described in be in charge of and have for introducing the interface of purge gas.
Ammonia-spraying grid of the present utility model, is carrying be provided with interface being in charge of of ammonia to spout, even if stopping up appears in spout in the situations such as low load operation, can introduce purge gas by interface, spout is purged, to remove the dust gathering on spout, prevent that spout is blocked.
Preferably, described interface is in charge of the pipeline section near described spout described in being opened in.
Interface can be arranged on to the pipeline section near spout, to reduce purge gas, be delivered to the pressure loss of spout, improve the validity that spout is purged.
Preferably, described interface has the pipeline being communicated with pressure-air, and described pipeline is provided with blowing valve.
Can also blowing valve be set at interface, by blowing valve, be communicated with pressure-air, using pressure-air as purge gas, can be to environment, just without air blowing gas is further processed yet; Meanwhile, pressure-air ratio is easier to obtain, and in the situation that guaranteeing to purge efficiency, has saved cost.
Preferably, described spout is offered along the flow direction of flue gas.
Compare with the spout of offering perpendicular to flow of flue gas direction in prior art, the spout of offering along flow of flue gas direction can effectively avoid dust to adhere to, and reduces stifled ash.Meanwhile, directly perforate on pipe, has reduced the complexity that conventional spout is installed.
Preferably, also comprise spray ammonia pipe, described spray ammonia pipe is provided with some described spouts, described in one end of being in charge of be communicated with the main pipeline of conveying ammonia, the other end is communicated with described spray ammonia pipe.
First ammonia is delivered to spray ammonia pipe by being in charge of, and then spray by spout, spray arranging and can carrying out secondary distribution to ammonia of ammonia pipe, to improve the uniformity of ammonia that each spout is sprayed, thereby the uniformity that in raising flue, the flue gas of each several part mixes with ammonia, improves denitration efficiency.
Preferably, described in, be in charge of and main pipeline between pipeline be provided with the valve of controlling ammonia flow.
Can according to the extent of reaction of each several part flue gas and ammonia in flue, adjust the aperture of valve, to adjust the ammonia spraying amount of each several part, improve spray ammonia uniformity.
Preferably, described in be in charge of and main pipeline between pipeline on be also provided with flowmeter, to detect in real time the flow of being respectively in charge of interior ammonia.
Preferably, also comprise some pipeline group, described in each, pipeline group comprises described in some and being in charge of, and be in charge of described in each and be communicated with at least two described spray ammonia pipes, and it is parallel described in each, to spray ammonia pipe.
Some pipeline group can comparatively be evenly distributed in flue, thereby flue is divided into some control areas, in each pipeline group, again ammonia is delivered to each spray ammonia pipe and further distributes by being in charge of, so that ammonia can spray in flue comparatively equably, the flue gas in flue is fully mixed with ammonia.
Preferably, described in each in pipeline group, the spacing between two adjacent described spray ammonia pipes equates.
Preferably, described in each, spray ammonia pipe in the same plane perpendicular to flow of flue gas direction.
Accompanying drawing explanation
Fig. 1 is the side structure schematic diagram of ammonia-spraying grid that the utility model provides in a kind of specific embodiment;
Fig. 2 is the plan structure schematic diagram of ammonia-spraying grid shown in Fig. 1;
Fig. 3 is the Facad structure schematic diagram of ammonia-spraying grid shown in Fig. 1.
In Fig. 1-3:
1 spout, 2 is in charge of, 21 interfaces, 211 blowing valves, 3 spray ammonia pipes, 4 main pipelines, 5 valves, 6 flowmeters
The specific embodiment
Core of the present utility model is to provide a kind of ammonia-spraying grid, can prevent that the dust in flue gas from stopping up spout, improves the mixing uniformity of ammonia and flue gas, improves adequacy and the denitration efficiency of denitrating flue gas.
In order to make those skilled in the art person understand better the utility model scheme, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the side structure schematic diagram of ammonia-spraying grid that the utility model provides in a kind of specific embodiment; Fig. 2 is the plan structure schematic diagram of ammonia-spraying grid shown in Fig. 1.
Ammonia-spraying grid of the present utility model comprises spout 1 and is in charge of 2, and spout 1, for spray ammonia in flue, is in charge of 2 and is communicated with spout 1, and be communicated with ammonia source, to spout 1 conveying ammonia; As shown in Figure 1, be in charge of 2 and be also provided with interface 21, interface 21, for introducing purge gas, when spout 1 stops up, can be carried purge gas to spout 1 by interface 21, to spout 1 is purged, thereby maintains the stable operation of spraying ammonia system.
Interface 21 can be arranged near on the pipeline section of spout 1, shorter to the distance of spout 1 by interface 21, thereby can effectively reduce the pressure loss of purge gas in course of conveying, improves and purges efficiency, effectively removes the dust gathering on spout 1.
Obviously, described is comparatively speaking near spout 1, in the situation that be in charge of, one end of 2 is communicated with ammonia source, 1 connection of other end spout, and interface 21 is arranged on the close pipeline section of spout 1 and refers to that interface 21, relatively away from ammonia source, more approaches spout 1.
Interface 21 can also have the pipeline being communicated with pressure-air, using pressure-air as purge gas, to compare as purge gas with adopting other gases, pressure-air comparatively easily obtains, and can be to environment, cost and refuse processing cost can effectively economize in raw materials; On the pipeline being communicated with pressure-air at interface 21, blowing valve 211 can also be set, to pass through the amount of the regulation purge gas of blowing valve 211, the keying of control interface 21, controls purge simultaneously.
On the basis of the above, spout 1 can be offered along the flow direction of flue gas, and in 1 pair of flue gas of spray group, the resistance of dust is less, can effectively reduce the Dust Capacity being attached on spout 1, avoids the stifled ash of spout 1.
Particularly, ammonia-spraying grid of the present utility model can also comprise spray ammonia pipe 3, on spray ammonia pipe 3, some spouts 1 can be set; Can adopt main pipeline 4 to carry out the conveying of ammonia, one end of being in charge of 2 is communicated with main pipeline 4, the other end is communicated with spray ammonia pipe 3, then by spray ammonia pipe 3, to spout 1, carries ammonia.
Spray arranging and can cushioning being evenly in charge of 2 ammonias that transport of ammonia pipe 3, and then outwards spray by the spout 1 on it, to improve the harmony of ammonia that each spout 1 is sprayed, so that ammonia fully mixes with flue gas, avoid the situation that occurs that local ammonia concentration is too high or too low.
In being provided with the embodiment of spray ammonia pipe 3, can directly on spray ammonia pipe 3, offer gap, to form spout 1, total is comparatively simple; What is more important, spout 1 is formed on spray ammonia pipe 3, substantially can not give prominence to the main part of spray ammonia pipe 3, has reduced the resistance to flow of flue gas, has also further reduced the adhesion amount of dust, avoids spout 1 to stop up.
Can expect, be in charge of 2 and main pipeline 4 between pipeline on valve 5 can be set, by 5 pairs, valve, be delivered to and be in charge of 2 ammonia flow and control; Within certain is in charge of the flue of 2 corresponding regions, ammonia concentration is too high or when too low, can reduce or increase the aperture of valve 5, adjusts in time ammonia concentration, improves the denitration efficiency of flue gas.
Wherein, valve 5 can be butterfly valve or other flow control valves.
It will also be appreciated that, be in charge of 2 and main pipeline 4 between pipeline on just flowmeter 6 can also be set, flowmeter 6 can detect in real time and be delivered to the ammonia amount of being in charge of 2, so that the flow detecting according to flowmeter 6 carry out the aperture of control valve 5 in conjunction with the content of the different test points of SCR reactor outlet section place nitrogen oxide.
The ammonia-spraying grid of prior art cannot regulate control to local ammonia spraying amount, and without the blow device that prevents that spout 1 from stopping up, the utility model can be introduced purge gas by interface 21, valve 5 and flowmeter 6 are installed being in charge of on 2, to regulate the spray ammonia concentration in each region of flue, ammonia is mixed with flue gas Quick uniform in flue, low cost of manufacture is especially stronger to the regulating power of operating mode dynamic change.
Please, further combined with Fig. 3, Fig. 3 is the Facad structure schematic diagram of ammonia-spraying grid shown in Fig. 1.
Ammonia-spraying grid of the present utility model can comprise some pipeline group, thereby flue is divided into some control areas; Each pipeline group comprises is somely in charge of 2, and each is in charge of 2 and is at least communicated with two spray ammonia pipes 3, and parallel between each spray ammonia pipe 3, as Figure 1-3.
First ammonia is assigned to each by main pipeline 4 is in charge of in 2, then by each, is in charge of 2 and is assigned in each spray ammonia pipe 3, and then spray in flue by the spout 1 on spray ammonia pipe 3; In said process, ammonia is outwards sprayed by spout 1 after secondary distribution again, can improve the uniformity that ammonia distributes, and then improves the distributing homogeneity of ammonia in flue, so that flue gas can evenly mix with ammonia, improves reaction efficiency.
In each pipeline group, the spacing between two adjacent spray ammonia pipes 3 can equate, sprays ammonia pipe 3 and is uniformly distributed in flue, improves to the harmony of spraying ammonia in flue.
Each can also be sprayed to ammonia pipe 3 is arranged in same plane, and this plane is perpendicular to the flow direction of flue gas, each spray ammonia pipe 3 is parallel to each other, the some spray ammonia pipes 3 that equidistantly distribute are evenly distributed in flue, by spout 1, to spray ammonia pipe 3, spray ammonia, ammonia is ejected into equably to the various piece of flue.
As shown in Figures 2 and 3, between some pipeline group, can cooperatively interact, the spacing between adjacent channel group can equate, whole flue is divided into some control areas by pipeline group, to realize the even injection of ammonia.
Above ammonia-spraying grid provided by the utility model is described in detail.Applied specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand core concept of the present utility model.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. an ammonia-spraying grid, comprise be in charge of (2) that are communicated with the spout (1) that sprays ammonia, be communicated with described being in charge of (2) with ammonia source, it is characterized in that, have the interface (21) for introducing purge gas described being in charge of (2), described interface (21) has the pipeline being communicated with pressure-air.
2. ammonia-spraying grid as claimed in claim 1, is characterized in that, is in charge of (2) near the pipeline section of described spout (1) described in described interface (21) is opened in.
3. ammonia-spraying grid as claimed in claim 1, is characterized in that, described interface (21) has the pipeline being communicated with pressure-air, and described pipeline is provided with blowing valve (211).
4. the ammonia-spraying grid as described in claim 1-3 any one, is characterized in that, described spout (1) is offered along the flow direction of flue gas.
5. ammonia-spraying grid as claimed in claim 4, it is characterized in that, also comprise spray ammonia pipe (3), described spray ammonia pipe (3) is provided with some described spouts (1), one end of described being in charge of (2) is communicated with carrying the main pipeline (4) of ammonia, and the other end is communicated with described spray ammonia pipe (3).
6. ammonia-spraying grid as claimed in claim 5, is characterized in that, described in be in charge of pipeline between (2) and main pipeline (4) and be provided with the valve (5) of controlling ammonia flow.
7. ammonia-spraying grid as claimed in claim 6, is characterized in that, described in be in charge of on the pipeline between (2) and main pipeline (4) and be also provided with flowmeter (6).
8. ammonia-spraying grid as claimed in claim 5, it is characterized in that, also comprise some pipeline group, described in each, pipeline group comprises described in some and is in charge of (2), described in each, be in charge of (2) and be communicated with at least two described spray ammonia pipes (3), and it is parallel described in each, to spray ammonia pipe (3).
9. ammonia-spraying grid as claimed in claim 8, is characterized in that, described in each in pipeline group, the spacing between two adjacent described spray ammonia pipes (3) equates.
10. ammonia-spraying grid as claimed in claim 9, is characterized in that, sprays ammonia pipe (3) described in each in the same plane perpendicular to flow of flue gas direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420083422.5U CN203829901U (en) | 2014-02-26 | 2014-02-26 | Ammonia spraying grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420083422.5U CN203829901U (en) | 2014-02-26 | 2014-02-26 | Ammonia spraying grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203829901U true CN203829901U (en) | 2014-09-17 |
Family
ID=51507795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420083422.5U Expired - Lifetime CN203829901U (en) | 2014-02-26 | 2014-02-26 | Ammonia spraying grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203829901U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678851A (en) * | 2017-02-23 | 2017-05-17 | 东方电气集团东方锅炉股份有限公司 | Removing device for black smoke produced by heavy oil burning in start-up initial stage of coal-fired boiler |
| CN108543421A (en) * | 2018-07-02 | 2018-09-18 | 大唐环境产业集团股份有限公司 | A kind of accumulatingdust plug nozzle device of ammonia-spraying grid |
-
2014
- 2014-02-26 CN CN201420083422.5U patent/CN203829901U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678851A (en) * | 2017-02-23 | 2017-05-17 | 东方电气集团东方锅炉股份有限公司 | Removing device for black smoke produced by heavy oil burning in start-up initial stage of coal-fired boiler |
| CN108543421A (en) * | 2018-07-02 | 2018-09-18 | 大唐环境产业集团股份有限公司 | A kind of accumulatingdust plug nozzle device of ammonia-spraying grid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140917 |