CN106823797A - A kind of ammonia-spraying grid device - Google Patents
A kind of ammonia-spraying grid device Download PDFInfo
- Publication number
- CN106823797A CN106823797A CN201710070946.9A CN201710070946A CN106823797A CN 106823797 A CN106823797 A CN 106823797A CN 201710070946 A CN201710070946 A CN 201710070946A CN 106823797 A CN106823797 A CN 106823797A
- Authority
- CN
- China
- Prior art keywords
- ammonia
- spray
- main pipe
- spray ammonia
- pipe
- 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.)
- Pending
Links
- 238000005507 spraying Methods 0.000 title claims abstract description 40
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 296
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 148
- 239000007921 spray Substances 0.000 claims abstract description 106
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003546 flue gas Substances 0.000 claims abstract description 27
- 238000009792 diffusion process Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- 239000003517 fume Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of ammonia-spraying grid device, including：Multiple spray ammonia main pipe (1), multiple spray ammonia main pipe (1) is disposed in parallel in the same section of flue gas flow direction；Multiple spray ammonia branch pipe, it is connected with spray ammonia main pipe (1), spray and multiple spray-holes are provided with ammonia main pipe (1), spray ammonia branch pipe is inserted perpendicularly into spray ammonia main pipe by spray-hole respectively, ammonia is mixed by spraying the diffusion ejection of ammonia branch pipe from spray ammonia main pipe with flue gas.A kind of ammonia-spraying grid device of the invention, can effectively facilitate ammonia and mix 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 mixing ammonia is obvious by spraying the effect that ammonia branch pipe is diffused, and the ammonia of ejection just be able to can be sufficiently mixed with flue gas by short distance, and ammonia concentration distribution is visibly homogeneous.
Description
Technical field
It is used for denitration desulphurization system cigarette the present invention relates to environment-protecting industrial fume treatment technical equipment field, more particularly to one kind
Ammonia-spraying grid device in road.
Background technology
It is SCR technology using most common gas denitrifying technology in current smoke processing system
(SCR), the penetrating of ammonia and mixing are one of technologies 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, nozzle injection 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, can cause that denitration efficiency declines and the escaping of ammonia increases, secondary pollution is serious.
Traditional ammonia-spraying grid structure is spray orifice directly to be arranged in spray ammonia main pipe or is stretched out isometrical (i.e. non-gradual change)
Spray ammonia branch pipe, ammonia mixes that diffusion length is larger with flue gas after spraying, and mixed effect is undesirable.When flue length is inadequate, ammonia
It is to be restricted with the mixing uniformity of flue gas, have impact on denitration efficiency.Therefore need constantly to enter existing spray ammonia technical equipment
Row is improved and optimizated, the diffusion mixed of enhancing ammonia and flue gas, further lifting ammonia and flue gas flow field uniformity, is promoted mixed
Effect is closed, system effectiveness is improved.
The content of the invention
It is an object of the invention to provide a kind of ammonia-spraying grid device that ammonia can be promoted to mix with the diffusion of flue gas.
To achieve the above object, a kind of concrete technical scheme of ammonia-spraying grid device of the invention is：
A kind of ammonia-spraying grid device, including：Multiple spray ammonia main pipe, multiple spray ammonia main pipe is disposed in parallel in perpendicular to flue gas stream
To same section in；Multiple spray ammonia branch pipe, is connected with spray ammonia main pipe, and multiple spray-holes are provided with spray ammonia main pipe, sprays 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 spread spray with
Flue gas mixes.
Further, the caliber of spray 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 in spray ammonia main pipe are in interlaced arrangement.
Further, the length that the spray ammonia branch pipe in spray ammonia main pipe stretches out spray ammonia main pipe is 30~80mm.
Further, the vertical interval of the neighbouring two sprays ammonia branch pipe in spray ammonia main pipe is 100~250mm.
Further, the angle in the flue gas flow direction direction when axis direction of each spray ammonia branch pipe is with along spray is in 40~60 °.
Further, spray ammonia branch pipe is tapered, away from spray ammonia main pipe one end relative near one end of spray ammonia main pipe for gradually
Expand shape.
Further, spray ammonia branch pipe with spray ammonia main pipe be connected one end small aperture be 2~6mm, away from spray ammonia main pipe it is another
One end macropore diameter is 8~25mm.
A kind of advantage of ammonia-spraying grid device of the invention is：
1) ammonia can be effectively facilitated to mix with the diffusion of flue gas, improves ammonia concentration field distribution, improve reaction efficiency；
2) mixing ammonia is sprayed from spray ammonia main pipe by spraying ammonia branch pipe, and mixing ammonia is by spraying the effect that ammonia branch pipe is diffused
Substantially, the ammonia of ejection just be able to can be sufficiently mixed fruit with flue gas by short distance, and ammonia concentration distribution is visibly homogeneous；
3) to be particularly suited for flue space using the ammonia-spraying grid device of gradual-enlargement type spray ammonia branch pipe limited, and ammonia exists with flue gas
The limited mixing shorter situation of distance, can greatly promote the mixed effect of ammonia and flue gas diffusion, improve reactor and enter
The uniformity of mouth ammonia concentration distribution, and then reaction efficiency is improve, denitration efficiency is improve, the escaping of ammonia is reduced, reduce
Pollution.
Brief description of the drawings
Fig. 1 is the structural representation of ammonia-spraying grid device of the invention；
Fig. 2 is the structural representation of spray ammonia branch pipe of the invention；
Fig. 3 is the top view of spray ammonia branch pipe of the invention.
Specific embodiment
In order to be better understood by the purpose of the present invention, structure and function, below in conjunction with the accompanying drawings, to a kind of spray ammonia of the invention
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 invention, including multiple spray ammonia main pipes 1, multiple
Spray ammonia main pipe 1 is disposed in parallel in the same section of flue gas flow direction；Multiple spray ammonia branch pipes are provided with spray ammonia main pipe 1,
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 inserted perpendicularly into by spray-hole respectively
In spray ammonia main pipe, ammonia is mixed by spraying the diffusion ejection of ammonia branch pipe from spray ammonia main pipe with flue gas.
Further, the caliber D of spray ammonia main pipe 10It is 25~50mm, the caliber for preferably spraying 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 first adjacent spray ammonia main pipe
And second spray ammonia main pipe between spacing be 100~250mm, preferably spacing be 180mm.
Further, the multiple spray ammonia branch pipes in spray ammonia main pipe 1 are in interlaced arrangement.Wherein, the spray ammonia branch pipe in spray ammonia main pipe 1
The length b for stretching out spray ammonia main pipe 1 is 30~80mm, preferably extension elongation 40mm.
Further, the vertical interval a of the neighbouring two sprays ammonia branch pipe in spray ammonia main pipe 1 is 100~250mm, for example
Shown in Fig. 1 to Fig. 3, vertical interval between 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 the flue gas flow direction direction when axis direction of each spray ammonia branch pipe is with along spray is in 40~60 °,
It is preferred that angle is in 45 °, according to actual needs, it is also possible to take inverse spray, Angular Dimension is set with along spray, branch tube hub ammonia jet
In the horizontal direction.
Further, spray ammonia branch pipe is tapered, away from spray ammonia main pipe 1 one end relative near one end of spray ammonia main pipe for gradually
Expand shape, spray ammonia branch pipe with spray ammonia main pipe be connected one end small aperture d be 2~6mm, away from spray ammonia main pipe other end macropore hole
Footpath D is 8~25mm.Wherein, flaring shape spray ammonia branch pipe of the invention sprays the aperture of ammonia branch pipe in the case that extension elongation determines
The preferred 4mm in aperture, the preferred 20mm of macropore diameter.
A kind of ammonia-spraying grid device of the invention, can effectively facilitate ammonia and mix with the diffusion of flue gas, improve ammonia dense
Degree field distribution, improves reaction efficiency；Mixing ammonia sprays ammonia branch pipe and sprays by flaring, and mixing ammonia diffusion effect is obvious, ammonia
With flue gas in the exterior space of grid, just can be sufficiently mixed by short distance, ammonia concentration distribution is visibly homogeneous；Using gradual-enlargement type
The ammonia-spraying grid device for spraying ammonia branch pipe is particularly suited for that flue space is limited, and ammonia is shorter in limited mixing distance with flue gas
Situation, can greatly promote the mixed effect of ammonia and flue gas diffusion, improve the uniform of reactor inlet ammonia concentration distribution
Property, and then reaction efficiency is improve, and denitration efficiency is improve, the escaping of ammonia is reduced, reduce pollution.
The present invention is further described by specific embodiment above, it should be understood that, here specifically
Description, should not be construed as the restriction to the spirit and scope of the invention, and one of ordinary skilled in the art is reading this explanation
The various modifications made to above-described embodiment after book, belong to the scope that the present invention is protected.
Claims (9)
1. a kind of ammonia-spraying grid device, it is characterised in that including：
Multiple spray ammonia main pipe (1), multiple spray ammonia main pipe (1) is disposed in parallel in the same section of flue gas flow direction；
Multiple spray ammonia branch pipe, is 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 spray ammonia main pipe by spray-hole, ammonia spreads ejection with mixed with flue gas from spray ammonia main pipe by spraying ammonia branch pipe
Close.
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 two neighboring spray ammonia is female in ammonia-spraying grid device
The spacing of pipe is 100~250mm.
4. ammonia-spraying grid device according to claim 1, it is characterised in that the multiple spray ammonia branch pipes in spray ammonia main pipe (1)
In interlaced arrangement.
5. the ammonia-spraying grid device according to claim 1 or 4, it is characterised in that the spray ammonia branch pipe in spray ammonia main pipe (1) is stretched
The length for going out to spray ammonia main pipe is 30~80mm.
6. the ammonia-spraying grid device according to claim 1 or 4, it is characterised in that in spray ammonia main pipe (1) neighbouring two
The vertical interval of individual spray ammonia branch pipe is 100~250mm.
7. the ammonia-spraying grid device according to claim 1 or 4, it is characterised in that the axis direction of each spray ammonia branch pipe with
The angle in flue gas flow direction direction during along spray is in 40~60 °.
8. 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 one end of close spray ammonia main pipe.
9. ammonia-spraying grid device according to claim 1, it is characterised in that spray ammonia branch pipe with spray ammonia main pipe (1) and be connected one
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 |
|---|---|---|---|
| CN201710070946.9A CN106823797A (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 |
|---|---|---|---|
| CN201710070946.9A CN106823797A (en) | 2017-02-09 | 2017-02-09 | A kind of ammonia-spraying grid device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106823797A true CN106823797A (en) | 2017-06-13 |
Family
ID=59122131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710070946.9A Pending CN106823797A (en) | 2017-02-09 | 2017-02-09 | A kind of ammonia-spraying grid device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106823797A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107376608A (en) * | 2017-09-12 | 2017-11-24 | 北京国能中电节能环保技术股份有限公司 | A kind of SNCR spray nozzle devices for π type Process In A Tangential Firings |
Citations (5)
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|---|---|---|---|---|
| CN101601965A (en) * | 2009-07-24 | 2009-12-16 | 华电环保系统工程有限公司 | The ammonia-spraying grid device of SCR method denitrating flue gas, and SCR method flue-gas denitration process |
| CN105311959A (en) * | 2015-12-09 | 2016-02-10 | 光大环保（中国）有限公司 | Ammonia spraying grid for low-temperature SCR denitrification system |
| CN205288051U (en) * | 2015-12-24 | 2016-06-08 | 哈尔滨锅炉厂有限责任公司 | A high temperature spouts ammonia device for SCR denitrification facility |
| KR20160082444A (en) * | 2014-12-30 | 2016-07-08 | 두산엔진주식회사 | Reducing agent supplying apparatus |
| CN206823552U (en) * | 2017-02-09 | 2018-01-02 | 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 |
-
2017
- 2017-02-09 CN CN201710070946.9A patent/CN106823797A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101601965A (en) * | 2009-07-24 | 2009-12-16 | 华电环保系统工程有限公司 | The ammonia-spraying grid device of SCR method denitrating flue gas, and SCR method flue-gas denitration process |
| KR20160082444A (en) * | 2014-12-30 | 2016-07-08 | 두산엔진주식회사 | Reducing agent supplying apparatus |
| CN105311959A (en) * | 2015-12-09 | 2016-02-10 | 光大环保（中国）有限公司 | Ammonia spraying grid for low-temperature SCR denitrification system |
| CN205288051U (en) * | 2015-12-24 | 2016-06-08 | 哈尔滨锅炉厂有限责任公司 | A high temperature spouts ammonia device for SCR denitrification facility |
| CN206823552U (en) * | 2017-02-09 | 2018-01-02 | 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107376608A (en) * | 2017-09-12 | 2017-11-24 | 北京国能中电节能环保技术股份有限公司 | A kind of SNCR spray nozzle devices for π type Process In A Tangential Firings |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170613 |