CN110585876A - Low temperature denitration injection system - Google Patents
Low temperature denitration injection system Download PDFInfo
- Publication number
- CN110585876A CN110585876A CN201910996204.8A CN201910996204A CN110585876A CN 110585876 A CN110585876 A CN 110585876A CN 201910996204 A CN201910996204 A CN 201910996204A CN 110585876 A CN110585876 A CN 110585876A
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- CN
- China
- Prior art keywords
- gas path
- nozzle
- path pipe
- injection system
- low
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 18
- 239000007924 injection Substances 0.000 title claims abstract description 18
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000000694 effects Effects 0.000 claims abstract description 5
- 238000009792 diffusion process Methods 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 32
- 239000003546 flue gas Substances 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- 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
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (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)
- Dispersion Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a low-temperature denitration injection system which is arranged in a flue and comprises a main gas path pipe and a plurality of branch gas path pipes, wherein each branch gas path pipe is communicated with the main gas path pipe, and each branch gas path pipe is provided with a nozzle; be provided with movable vortex device on the nozzle, wherein, movable vortex device includes dead lever, rotation sleeve and is fixed in a plurality of blades on the rotation sleeve, and wherein, on the one end of dead lever was fixed in the outer wall of nozzle, the rotation sleeve activity cup jointed on the side of the dead lever other end, and wherein, the rotation sleeve is just to the spout of nozzle, and the jet resistance of this system is little, the misce bene, and ozone consumption is little simultaneously.
Description
Technical Field
The invention belongs to the technical field of low-temperature denitration, and relates to a low-temperature denitration injection system.
Background
Along with implementation of coal-electricity energy-saving emission-reduction upgrading and reconstruction action plans (2014-2020) and proposal of ultra-low emission requirements of governments in various places, NO is introduced into chimney inlet of coal-fired unitXThe discharge must be less than or equal to 50mg/m3Currently, the commonly used denitration methods include SCR, SNCR, activated carbon adsorption method, and ozone denitration.
The ozone denitration has the characteristics of high reaction selectivity, high speed, no need of heating flue gas, no secondary pollution, low investment and operation cost and the like, and has great advantages in full-load denitration of small unit boilers and large units. In order to improve the denitration efficiency, the ozone and NO in the flue gas must be usedXIntensive mixing avoids the flue gas short circuit phenomenon to take place, and present ozone injection apparatus generally adopts flue gas mixer or static diffusion vortex mode to realize this purpose, and the flue gas mixer shortcoming lies in the resistance big, and static diffusion vortex mode shortcoming lies in the flexibility relatively poor, can influence the homogeneity of mixing after the operating mode changes.
Therefore, how to provide an injection system with small resistance and uniform mixing and reduce ozone consumption is a problem to be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a low-temperature denitration spraying system which is small in spraying resistance, uniform in mixing and low in ozone consumption.
In order to achieve the purpose, the low-temperature denitration injection system is arranged in a flue and comprises a main gas path pipe and a plurality of branch gas path pipes, wherein each branch gas path pipe is communicated with the main gas path pipe, and each branch gas path pipe is provided with a nozzle;
the nozzle is provided with a movable turbulence device, wherein the movable turbulence device comprises a fixed rod, a rotating sleeve and a plurality of blades fixed on the rotating sleeve, one end of the fixed rod is fixed on the outer wall of the nozzle, the rotating sleeve is movably sleeved on the side face of the other end of the fixed rod, and the rotating sleeve is opposite to the nozzle of the nozzle.
The cross-sectional dimension of the outer wall of the rotating sleeve gradually increases in the direction in which the nozzle orifice of the nozzle points toward the rotating sleeve.
The cross section of the rotating sleeve is of a circular ring structure.
A bearing is arranged between the rotating sleeve and the fixed rod.
When the ozone generator works, ozone gas sprayed from the nozzle impacts the blades to drive the rotating sleeve to rotate, and the ozone gas is diffused to the periphery under the guide effect and the centrifugal force of the blades, wherein the diffusion angle is 120-145 degrees.
On the same branch gas path pipe, along the direction of keeping away from main gas path pipe, the cross section size of each nozzle diminishes gradually.
The distance between the adjacent branch gas circuit pipes is less than or equal to 1000 mm.
The distance between the adjacent nozzles on the same branch gas path pipe is less than or equal to 800 mm.
The windward sides of the main air path pipe and the branch air path pipe are provided with an anti-abrasion layer.
The invention has the following beneficial effects:
when the low-temperature denitration injection system is operated specifically, ozone gas sprayed out of the nozzle impacts the blades to drive the rotating sleeve to rotate, the ozone gas is diffused to the periphery under the guide effect and the centrifugal force of the blades, so that the ozone is uniformly sprayed into the flue, the flue gas and the ozone are uniformly mixed, the purpose of efficient denitration is achieved, the injection resistance is small, the ozone consumption is low, the structure is simple, the operation is convenient, and the practicability is strong.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a view showing the installation position of the nozzle 5 according to the present invention;
fig. 3 is a schematic structural view of the nozzle 5 and the movable spoiler 6.
Wherein, 1 is a flue, 2 is a main gas path pipe, 3 is a branch gas path pipe, 4 is a fixing device, 5 is a nozzle, 6 is a movable turbulence device, 7 is a fixed rod, 8 is a rotating sleeve, and 9 is a blade.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, 2 and 3, the low-temperature denitration injection system of the present invention includes a main gas line pipe 2 and a plurality of branch gas line pipes 3, each branch gas line pipe 3 is communicated with the main gas line pipe 2, and each branch gas line pipe 3 is provided with a nozzle 5; be provided with movable vortex device 6 on nozzle 5, wherein, movable vortex device 6 includes dead lever 7, rotates sleeve 8 and is fixed in a plurality of blades 9 on rotating sleeve 8, and wherein, on the one end of dead lever 7 was fixed in the outer wall of nozzle 5, the activity of rotating sleeve 8 cup jointed on the side of the dead lever 7 other end, and wherein, it is just to the spout of nozzle 5 to rotate sleeve 8.
The size of the cross section of the outer wall of the rotating sleeve 8 is gradually increased along the direction that the nozzle orifice of the nozzle 5 points to the rotating sleeve 8, wherein the cross section of the rotating sleeve 8 is of a circular ring structure; a bearing is arranged between the rotating sleeve 8 and the fixed rod 7.
When the ozone generator works, ozone gas sprayed from the nozzle 5 impacts the blades 9 to drive the rotating sleeve 8 to rotate, and the ozone gas is diffused to the periphery under the guiding action and the centrifugal force action of the blades 9, wherein the diffusion angle is 120-145 degrees.
On the same branch gas path pipe 3, along the direction far away from the main gas path pipe 2, the cross section size of each nozzle 5 gradually becomes smaller; the difference in internal diameter between the most proximal and the most distal nozzle 5 is no more than 2 mm. The main gas path pipe 2, the branch gas path pipe 3, the nozzle 5 and the movable flow disturbing device 6 are all made of 316L materials; the windward surfaces of the main air channel pipe 2 and the branch air channel pipes 3 are provided with an anti-abrasion layer.
The main gas path pipe 2 and the branch gas path pipe 3 are fixedly arranged in the flue 1 through a fixing device 4 in a direction perpendicular to the gas flow direction. The distance between the adjacent branch gas circuit pipes 3 is less than or equal to 1000 mm; the distance between the adjacent nozzles 5 on the same branch gas path pipe 3 is less than or equal to 800 mm.
The invention is arranged in the front flue 1 of the desulfurization system,the nozzles 5 are uniformly installed on the branch gas path pipes 3 in accordance with the size of the flue 1 to form a grid-like arrangement. Ozone is uniformly sprayed into the flue 1 through the nozzle 5 and the movable flow disturbing device 6, is uniformly mixed with the flue gas and is used for NO in the flue gasxAnd oxidizing to achieve the aim of denitration.
Claims (9)
1. A low-temperature denitration injection system is arranged in a flue (1), and is characterized by comprising a main gas path pipe (2) and a plurality of branch gas path pipes (3), wherein each branch gas path pipe (3) is communicated with the main gas path pipe (2), and each branch gas path pipe (3) is provided with a nozzle (5);
be provided with movable vortex device (6) on nozzle (5), wherein, movable vortex device (6) include dead lever (7), rotate sleeve (8) and be fixed in a plurality of blades (9) on rotating sleeve (8), wherein, on the one end of dead lever (7) is fixed in the outer wall of nozzle (5), rotate sleeve (8) activity and cup joint on the side of dead lever (7) other end, wherein, rotate sleeve (8) just to the spout of nozzle (5).
2. The cryogenic denitration injection system according to claim 1, wherein the cross-sectional size of the outer wall of the rotating sleeve (8) is gradually increased in a direction in which the nozzle orifice of the nozzle (5) is directed to the rotating sleeve (8).
3. The low-temperature denitration injection system according to claim 1, wherein the cross section of the rotating sleeve (8) is a circular ring structure.
4. The low-temperature denitration injection system according to claim 1, wherein a bearing is provided between the rotary sleeve (8) and the fixed rod (7).
5. The low-temperature denitration spraying system according to claim 1, wherein in operation, ozone gas sprayed from the nozzle (5) impinges on the blades (9) to drive the rotating sleeve (8) to rotate, and the ozone gas is diffused all around under the guiding action and centrifugal force of the blades (9), wherein the diffusion angle is 120-145 °.
6. The cryogenic denitration injection system according to claim 1, wherein the cross-sectional size of each nozzle (5) is gradually reduced in the same branch gas path pipe (3) in a direction away from the main gas path pipe (2).
7. The low-temperature denitration injection system according to claim 1, wherein a distance between adjacent branch gas path pipes (3) is 1000mm or less.
8. The low-temperature denitration injection system according to claim 1, wherein the distance between adjacent nozzles (5) on the same branch gas path pipe (3) is not more than 800 mm.
9. The low-temperature denitration injection system according to claim 1, wherein an anti-abrasion layer is provided on the windward side of the main gas path pipe (2) and the branch gas path pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910996204.8A CN110585876A (en) | 2019-10-18 | 2019-10-18 | Low temperature denitration injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910996204.8A CN110585876A (en) | 2019-10-18 | 2019-10-18 | Low temperature denitration injection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110585876A true CN110585876A (en) | 2019-12-20 |
Family
ID=68850991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910996204.8A Pending CN110585876A (en) | 2019-10-18 | 2019-10-18 | Low temperature denitration injection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110585876A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114053869A (en) * | 2020-07-30 | 2022-02-18 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Ammonia spraying grid nozzle and ammonia spraying grid system |
| CN115121118A (en) * | 2022-07-27 | 2022-09-30 | 西安热工研究院有限公司 | SCR denitration ammonia injection system and SCR denitration ammonia injection control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201543395U (en) * | 2009-09-23 | 2010-08-11 | 中电投远达环保工程有限公司 | Dynamic mixing device for SCR denitration system |
| CN204073851U (en) * | 2014-09-11 | 2015-01-07 | 北京国电清新环保技术股份有限公司 | A kind of denitrating system that ammonia injection flow-disturbing conglomerate integration device is housed |
| CN107715672A (en) * | 2017-09-30 | 2018-02-23 | 江苏天立方环保工程有限公司 | A kind of ozone flow field bioactive molecule distributor |
| CN207187509U (en) * | 2017-08-30 | 2018-04-06 | 中国新时代国际工程公司 | A kind of self-operated type swirl injection mixing arrangement |
| CN210874777U (en) * | 2019-10-18 | 2020-06-30 | 西安热工研究院有限公司 | Low temperature denitration injection system |
-
2019
- 2019-10-18 CN CN201910996204.8A patent/CN110585876A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201543395U (en) * | 2009-09-23 | 2010-08-11 | 中电投远达环保工程有限公司 | Dynamic mixing device for SCR denitration system |
| CN204073851U (en) * | 2014-09-11 | 2015-01-07 | 北京国电清新环保技术股份有限公司 | A kind of denitrating system that ammonia injection flow-disturbing conglomerate integration device is housed |
| CN207187509U (en) * | 2017-08-30 | 2018-04-06 | 中国新时代国际工程公司 | A kind of self-operated type swirl injection mixing arrangement |
| CN107715672A (en) * | 2017-09-30 | 2018-02-23 | 江苏天立方环保工程有限公司 | A kind of ozone flow field bioactive molecule distributor |
| CN210874777U (en) * | 2019-10-18 | 2020-06-30 | 西安热工研究院有限公司 | Low temperature denitration injection system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114053869A (en) * | 2020-07-30 | 2022-02-18 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Ammonia spraying grid nozzle and ammonia spraying grid system |
| CN115121118A (en) * | 2022-07-27 | 2022-09-30 | 西安热工研究院有限公司 | SCR denitration ammonia injection system and SCR denitration ammonia injection control method |
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