CN206823552U - A kind of ammonia-spraying grid device - Google Patents
A kind of ammonia-spraying grid device Download PDFInfo
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- CN206823552U CN206823552U CN201720119340.5U CN201720119340U CN206823552U CN 206823552 U CN206823552 U CN 206823552U CN 201720119340 U CN201720119340 U CN 201720119340U CN 206823552 U CN206823552 U CN 206823552U
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- ammonia
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- main pipe
- spraying
- spray ammonia
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Abstract
The utility model discloses a kind of ammonia-spraying grid device, including：Multiple spray ammonia main pipes (1), multiple spray ammonia main pipes (1) are disposed in parallel in the same section of flue gas flow direction；Multiple spray ammonia branch pipes, it is connected with spray ammonia main pipe (1), multiple spray-holes are provided with spray ammonia main pipe (1), spray ammonia branch pipe is inserted perpendicularly into spray ammonia main pipe by spray-hole respectively, and ammonia is sprayed to be mixed with flue gas from spray ammonia main pipe by spraying the diffusion of ammonia branch pipe.A kind of ammonia-spraying grid device of the present utility model, ammonia can be effectively facilitated and mixed with the diffusion of flue gas, improve ammonia concentration field distribution, improve reaction efficiency；Mixing ammonia is sprayed from spray ammonia main pipe by spraying ammonia branch pipe, and the positive effect that mixing ammonia is diffused by spraying ammonia branch pipe, the ammonia of ejection be able to can be sufficiently mixed with flue gas by short distance, and ammonia concentration distribution is visibly homogeneous.
Description
Technical field
Environment-protecting industrial fume treatment technical equipment field is the utility model is related to, more particularly to one kind is used for denitration desulfurization system
Ammonia-spraying grid device in system flue.
Background technology
It is SCR technology using most common gas denitrifying technology in current smoke processing system
(SCR), ammonia penetrating and mixing be one of technology of core the most, and the dress of core the most in the fume treatment technology
It is ammonia-spraying grid (AIG) to put.Ammonia-spraying grid is arranged in flue, and nozzle sprays ammonia in ammonia-spraying grid, in the effect of catalyst
Under, the ammonia (NH of penetrating3) and nitrogen oxides (NOX) mixing react, the two mixability determines the height of denitration efficiency
It is low, if flue gas and ammonia mixing not enough fully, denitration efficiency can be caused to decline and the escaping of ammonia increase, secondary pollution is serious.
Traditional ammonia-spraying grid structure is that spray orifice is directly arranged in spray ammonia main pipe or is stretched out isometrical (i.e. non-gradual change)
Ammonia branch pipe is sprayed, ammonia mixes that diffusion length is larger, and mixed effect is undesirable with flue gas after spraying.When flue length is inadequate, ammonia
It is restricted with the mixing uniformity of flue gas, have impact on denitration efficiency.Therefore need constantly to enter existing spray ammonia technical equipment
Row improves and optimizates, and strengthens the diffusion mixed of ammonia and flue gas, further lifts ammonia and flue gas flow field uniformity, promotes mixed
Effect is closed, improves system effectiveness.
Utility model content
The purpose of this utility model is to provide a kind of ammonia-spraying grid that ammonia can be promoted to mix with the diffusion of flue gas dress
Put.
To achieve the above object, a kind of concrete technical scheme of ammonia-spraying grid device of the present utility model is：
A kind of ammonia-spraying grid device, including：Multiple spray ammonia main pipes, multiple spray ammonia main pipes are disposed in parallel in perpendicular to flue gas stream
To same section in；Multiple spray ammonia branch pipes, are connected with spray ammonia main pipe, spray and multiple spray-holes are provided with ammonia main pipe, spray ammonia
Branch pipe respectively by spray-hole be inserted perpendicularly into spray ammonia main pipe in, ammonia from spray ammonia main pipe in by spray ammonia branch pipe diffusion spray with
Flue gas mixes.
Further, the caliber for spraying ammonia main pipe is 25~50mm.
Further, the spacing of two neighboring spray ammonia main pipe is 100~250mm in ammonia-spraying grid device.
Further, the multiple spray ammonia branch pipes sprayed in ammonia main pipe are in interlaced arrangement.
Further, the length for spraying the spray ammonia branch pipe stretching spray ammonia main pipe in ammonia main pipe is 30~80mm.
Further, the vertical interval for spraying neighbouring two sprays ammonia branch pipe in ammonia main pipe is 100~250mm.
Further, the angle in flue gas flow direction direction when each the axis direction of spray ammonia branch pipe is with along spray is in 40~60 °.
Further, it is tapered to spray ammonia branch pipe, remote one end for spraying ammonia main pipe is relative to close one end for spraying ammonia main pipe for gradually
Expand shape.
Further, it is 2~6mm to spray ammonia branch pipe with spraying the be connected small aperture of one end of ammonia main pipe, remote to spray the another of ammonia main pipe
One end macropore diameter is 8~25mm.
A kind of the advantages of ammonia-spraying grid device of the present utility model, is：
1) ammonia can be effectively facilitated to mix with the diffusion of flue gas, improves ammonia concentration field distribution, improve reaction efficiency；
2) mix ammonia to spray by spraying ammonia branch pipe from spray ammonia main pipe, the effect that mixing ammonia is diffused by spraying ammonia branch pipe
Fruit is obvious, and the ammonia of ejection be able to can be sufficiently mixed with flue gas by short distance, and ammonia concentration distribution is visibly homogeneous；
3) being particularly suitable for use in using the ammonia-spraying grid device of gradual-enlargement type spray ammonia branch pipe, flue space is limited, and ammonia exists with flue gas
The limited shorter situation of mixing distance, can greatly promote ammonia and the mixed effect of flue gas diffusion, improve reactor and enter
The uniformity of mouth ammonia concentration distribution, and then reaction efficiency is improved, denitration efficiency is improved, reduces the escaping of ammonia, is reduced
Pollution.
Brief description of the drawings
Fig. 1 is the structural representation of ammonia-spraying grid device of the present utility model；
Fig. 2 is the structural representation of spray ammonia branch pipe of the present utility model；
Fig. 3 is the top view of spray ammonia branch pipe of the present utility model.
Embodiment
In order to be better understood by the purpose of this utility model, structure and function, below in conjunction with the accompanying drawings, to of the present utility model
A kind of ammonia-spraying grid device does further detailed description.
As shown in Figure 1 to Figure 3, it is shown as a kind of ammonia-spraying grid device of the present utility model, including multiple spray ammonia main pipes 1,
Multiple spray ammonia main pipes 1 are disposed in parallel in the same section of flue gas flow direction；Multiple spray ammonia branch are provided with spray ammonia main pipe 1
Pipe, it is connected with spray ammonia main pipe 1, multiple spray-holes is provided with spray ammonia main pipe 1, spray ammonia branch pipe is vertically inserted by spray-hole respectively
Enter to spray in ammonia main pipe, ammonia is sprayed to be mixed with flue gas from spray ammonia main pipe by spraying the diffusion of ammonia branch pipe.
Further, the caliber D of ammonia main pipe 1 is sprayed0For 25~50mm, the caliber that preferably sprays ammonia main pipe is 32mm, ammonia-spraying grid
The spacing c of two neighboring spray ammonia main pipe is 100~250mm in device, such as shown in Fig. 1 to Fig. 3, the adjacent first spray ammonia main pipe
And second spray ammonia main pipe between spacing be 100~250mm, preferably spacing is 180mm.
Further, the multiple spray ammonia branch pipes sprayed in ammonia main pipe 1 are in interlaced arrangement.Wherein, the spray ammonia branch pipe in ammonia main pipe 1 is sprayed
The length b for stretching out spray ammonia main pipe 1 is 30~80mm, preferably extension elongation 40mm.
Further, the vertical interval a for spraying neighbouring two sprays ammonia branch pipe in ammonia main pipe 1 is 100~250mm, such as
Shown in Fig. 1 to Fig. 3, vertical interval between the neighbouring first spray ammonia branch pipe 21 and the second spray ammonia branch pipe 22 for 100~
250mm, preferred vertical spacing 125mm.
Wherein, the angle ɑ (β) in flue gas flow direction direction when each the axis direction of spray ammonia branch pipe is with along spray is in 40~60 °,
It is preferred that angle is in 45 °, according to being actually needed, inverse spray can also be taken, Angular Dimension is set with along spray, branch tube hub ammonia jet
In the horizontal direction.
Further, it is tapered to spray ammonia branch pipe, remote one end for spraying ammonia main pipe 1 is relative to close one end for spraying ammonia main pipe for gradually
Expand shape, spray ammonia branch pipe is 2~6mm with spraying the be connected small aperture d of one end of ammonia main pipe, the remote other end macropore hole for spraying ammonia main pipe
Footpath D is 8~25mm.Wherein, flaring shape spray ammonia branch pipe of the present utility model sprays ammonia branch pipe in the case that extension elongation determines
The preferred 4mm of small aperture, the preferred 20mm of macropore diameter.
A kind of ammonia-spraying grid device of the present utility model, ammonia can be effectively facilitated and mixed with the diffusion of flue gas, improve ammonia
Gas concentration field distribution, improve reaction efficiency；Mixing ammonia and the ejection of ammonia branch pipe is sprayed by flaring, mixing ammonia diffusion effect is obvious,
Ammonia and flue gas can be sufficiently mixed, ammonia concentration distribution is visibly homogeneous by short distance in the exterior space of grid；Using gradually
The ammonia-spraying grid device flue space that is particularly suitable for use in of expansion formula spray ammonia branch pipe is limited, ammonia and flue gas limited mixing distance compared with
Short situation, ammonia and the mixed effect of flue gas diffusion can be greatly promoted, improve the distribution of reactor inlet ammonia concentration
Uniformity, and then reaction efficiency is improved, denitration efficiency is improved, reduces the escaping of ammonia, reduces pollution.
The utility model is further described by specific embodiment above, it should be understood that, have here
The description of body, should not be construed as the restriction to spirit and scope of the present utility model, and one of ordinary skilled in the art is readding
The various modifications made after reader specification to above-described embodiment, belong to the scope that the utility model is protected.
Claims (6)
- A kind of 1. ammonia-spraying grid device, it is characterised in that including：Multiple spray ammonia main pipes (1), multiple spray ammonia main pipes (1) are disposed in parallel in the same section of flue gas flow direction；Multiple spray ammonia branch pipes, are connected with spray ammonia main pipe (1), and multiple spray-holes, spray ammonia branch pipe point are provided with spray ammonia main pipe (1) It is not inserted perpendicularly into by spray-hole in spray ammonia main pipe, ammonia is sprayed to be mixed with flue gas from spray ammonia main pipe by spraying the diffusion of ammonia branch pipe Close；Wherein, the spacing of two neighboring spray ammonia main pipe is 100~250mm in ammonia-spraying grid device, multiple in spray ammonia main pipe (1) It is in interlaced arrangement to spray ammonia branch pipe, and the vertical interval of neighbouring two sprays ammonia branch pipe in spray ammonia main pipe (1) is 100~250mm.
- 2. ammonia-spraying grid device according to claim 1, it is characterised in that the caliber of spray ammonia main pipe (1) is 25~50mm.
- 3. ammonia-spraying grid device according to claim 1, it is characterised in that the spray ammonia branch pipe in spray ammonia main pipe (1) stretches out The length for spraying ammonia main pipe is 30~80mm.
- 4. ammonia-spraying grid device according to claim 1, it is characterised in that the axis direction of each spray ammonia branch pipe and suitable spray When flue gas flow direction direction angle be in 40~60 °.
- 5. ammonia-spraying grid device according to claim 1, it is characterised in that spray ammonia branch pipe is tapered, away from spray ammonia main pipe (1) one end is flaring shape relative to close to one end of spray ammonia main pipe.
- 6. ammonia-spraying grid device according to claim 1, it is characterised in that spray ammonia branch pipe is connected one with spraying ammonia main pipe (1) The small aperture at end is 2~6mm, and the other end macropore diameter away from spray ammonia main pipe (1) is 8~25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720119340.5U CN206823552U (en) | 2017-02-09 | 2017-02-09 | A kind of ammonia-spraying grid device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720119340.5U CN206823552U (en) | 2017-02-09 | 2017-02-09 | A kind of ammonia-spraying grid device |
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| Publication Number | Publication Date |
|---|---|
| CN206823552U true CN206823552U (en) | 2018-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720119340.5U Active CN206823552U (en) | 2017-02-09 | 2017-02-09 | A kind of ammonia-spraying grid device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823797A (en) * | 2017-02-09 | 2017-06-13 | 北京国能中电节能环保技术股份有限公司 | A kind of ammonia-spraying grid device |
| 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 |
-
2017
- 2017-02-09 CN CN201720119340.5U patent/CN206823552U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823797A (en) * | 2017-02-09 | 2017-06-13 | 北京国能中电节能环保技术股份有限公司 | A kind of ammonia-spraying grid device |
| 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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