CN205796965U - A kind of coal-fired plant flue gas SCR denitration ammonia-spraying grid structure - Google Patents
A kind of coal-fired plant flue gas SCR denitration ammonia-spraying grid structure Download PDFInfo
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- CN205796965U CN205796965U CN201620620469.XU CN201620620469U CN205796965U CN 205796965 U CN205796965 U CN 205796965U CN 201620620469 U CN201620620469 U CN 201620620469U CN 205796965 U CN205796965 U CN 205796965U
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- spray ammonia
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Abstract
This utility model is applicable to spray the engineering project that the ammonia point mixing distance away from catalyst is the shortest, relates to a kind of coal-burning power plant SCR denitration ammonia-spraying grid structure, including spray ammonia arm, it is characterised in that described spray ammonia arm uses the version of spray ammonia reducing arm；Described spray ammonia reducing arm connects some nozzle short tube groups, often group nozzle short tube group all includes two symmetrically arranged nozzle short tubes, it is provided with nozzle plate between two symmetrically arranged nozzle short tubes, fixes the distance between two nozzle short tubes by nozzle plate and block each nozzle short tube end port；The tube wall surrounding of described each nozzle short tube all has some spouts.This utility model spray ammonia arm uses variable-diameter structure, nozzle short tube termination uses cover plate closure, at tube wall surrounding hatch frame, play the mode increasing spout quantity, manufacturing local eddy currents, thus form a large amount of eddy current in local, it is achieved in short distance, ammonia mixes with the quick of flue gas.
Description
Technical field
This utility model relates to a kind of coal-burning power plant SCR denitration ammonia-spraying grid structure, it is adaptable to spray ammonia point is away from catalyst
The engineering project that mixing distance is the shortest.
Background technology
Overwhelming majority coal-fired plant flue gas denitration at present uses SCR technique, in SCR technique, and ammonia and the mixing of flue gas
Device typically uses ammonia-spraying grid or eddy current mixed plate.In most project, the mixing distance of spray ammonia point to catalyst has 7
~ 10 meters longer, but also has small part project, due to site factors or for the consideration of investment reduction, only has the most very by mixing distance
Short, the most only 3 ~ 4 meters (using boiler flue vertical shaft as the project of reactor).Therefore ammonia-spraying grid or the eddy current of routine are used
Mixing version just cannot meet the requirement of mix homogeneously, and this certainly will cause the escaping of ammonia to exceed standard.
Summary of the invention
The purpose of this utility model is to provide the ammonia-spraying grid of a short circuit journey mixing, is particularly well-suited to mixed distance only 3 ~ 4
The project of rice, and the spray ammonia mixing distance of the SCR of major part project has 7 ~ 10 meters or longer.
Main technical schemes of the present utility model: coal-burning power plant's SCR denitration ammonia-spraying grid structure, including spray ammonia arm, its
It is characterised by that described spray ammonia arm uses the version of spray ammonia reducing arm；It is short that described spray ammonia reducing arm connects some nozzles
Pipe group, often group nozzle short tube group all includes two symmetrically arranged nozzle short tubes, sets between two symmetrically arranged nozzle short tubes
There is nozzle plate, fix the distance between two nozzle short tubes by nozzle plate and block each nozzle short tube end port；Institute
The tube wall surrounding stating each nozzle short tube all has some spouts.
Usually, described coal-burning power plant SCR denitration ammonia-spraying grid structure, including two spray ammonia reducing arms.
Different from conventional nozzle end ejection ammonia gaseous mixture, the end port of nozzle short tube is covered by this utility model structure
Plate blocks, and arranges a strip nozzle plate between each two nozzle short tube, and one of effect of cover plate is to fix two nozzles
Distance between short tube, prevents high temperature deformation；The two of cover plate effect are as vortex board, all can shape in every piece of nozzle plate downstream
Become little eddy current, reach the purpose of strengthening mixing.Each nozzle short tube has spout, the side of ammonia mixed gas ejection in tube wall surrounding
To vertical with flue gas stream, the most not only spout quantity is significantly increased, and the air-flow of adjacent pore ejection intersects, mixed effect
Strengthened.
This utility model denitration ammonia-spraying grid structure, by hydrodynamics method, spray ammonia arm uses variable-diameter structure, nozzle
Short tube termination uses cover plate closure, at tube wall surrounding hatch frame, play the mode increasing spout quantity, manufacturing local eddy currents,
Thus forming a large amount of eddy current in local, it is achieved in short distance, ammonia mixes with the quick of flue gas.
Accompanying drawing explanation
Fig. 1 is the schematic top plan view of this utility model embodiment denitration ammonia-spraying grid structure.
Fig. 2 and Fig. 3 is the facade cross-sectional schematic of embodiment denitration ammonia-spraying grid structure.
In figure, 1-sprays ammonia reducing arm；2-nozzle short tube；3-nozzle plate.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, this utility model is described in detail in.
Embodiment: coal-burning power plant SCR denitration ammonia-spraying grid structural reference accompanying drawing 1-3, mainly includes spraying ammonia arm, and it is main
Feature is the version that spray ammonia arm uses spray ammonia reducing arm 1；Described spray ammonia reducing arm 1 connects some nozzle short tubes
Group, often group nozzle short tube group all includes two symmetrically arranged nozzle short tubes 2, sets between two symmetrically arranged nozzle short tubes 2
There is nozzle plate 3, fix the distance between two nozzle short tubes 2 by nozzle plate 3 and block each nozzle short tube 2 end
Mouthful；The tube wall surrounding of described each nozzle short tube 2 all has some spouts.
The ammonia-spraying grid structure of embodiment includes two spray ammonia reducing arms 1.
When embodiment is run, ammonia mixed gas is by spray ammonia reducing arm, nozzle short tube, nozzle plate, by ammonia gaseous mixture
Body sprays uniformly across the spout on each nozzle short tube so that denitrification reducing agent (ammonia) sprays into whole flue equably and cuts
On face, the air-flow of spout ejection intersects, and simultaneously under nozzle plate effect, produces a large amount of eddy current needed for mixing, so
NOx in ammonia and flue gas obtains Quick uniform mixing.
The present embodiment is on probation on 75t boiler and 210MW unit, it is achieved good mixed effect, reaches intended de-
Nitre requirement.Wherein in 75t boiler SCR project, spray ammonia mixing distance only has 3.3 meters.
Claims (2)
1. coal-burning power plant's SCR denitration ammonia-spraying grid structure, including spray ammonia arm, it is characterised in that described spray ammonia arm uses
The version of spray ammonia reducing arm；Described spray ammonia reducing arm connects some nozzle short tube groups, and often group nozzle short tube group is all wrapped
Include two symmetrically arranged nozzle short tubes, be provided with nozzle plate between two symmetrically arranged nozzle short tubes, pass through nozzle plate
Fix the distance between two nozzle short tubes and block each nozzle short tube end port；The tube wall surrounding of described each nozzle short tube
All there are some spouts.
2. coal-burning power plant as claimed in claim 1 SCR denitration ammonia-spraying grid structure, is characterized in that including that two spray ammonia reducings prop up
Pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620620469.XU CN205796965U (en) | 2016-06-22 | 2016-06-22 | A kind of coal-fired plant flue gas SCR denitration ammonia-spraying grid structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620620469.XU CN205796965U (en) | 2016-06-22 | 2016-06-22 | A kind of coal-fired plant flue gas SCR denitration ammonia-spraying grid structure |
Publications (1)
| Publication Number | Publication Date |
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| CN205796965U true CN205796965U (en) | 2016-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620620469.XU Active CN205796965U (en) | 2016-06-22 | 2016-06-22 | A kind of coal-fired plant flue gas SCR denitration ammonia-spraying grid structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731825A (en) * | 2016-12-27 | 2017-05-31 | 四川川锅锅炉有限责任公司 | A kind of disturbed flow type ammonia-spraying grid in boiler flue gas denitration system |
| CN109316902A (en) * | 2018-12-07 | 2019-02-12 | 国电科学技术研究院有限公司 | Multi-point rotary dissipates whirlpool and is mixed stream multi-pollutant advanced purification system |
| CN109482063A (en) * | 2018-11-15 | 2019-03-19 | 安徽威达环保科技股份有限公司 | A kind of sintering device flue gas SCR denitration concurrent heating and ammonia spray conglomerate integration device and technique |
| CN114225690A (en) * | 2021-12-03 | 2022-03-25 | 国家能源集团新能源技术研究院有限公司 | Ammonia spraying device, ammonia spraying equipment and ammonia spraying method |
-
2016
- 2016-06-22 CN CN201620620469.XU patent/CN205796965U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731825A (en) * | 2016-12-27 | 2017-05-31 | 四川川锅锅炉有限责任公司 | A kind of disturbed flow type ammonia-spraying grid in boiler flue gas denitration system |
| CN109482063A (en) * | 2018-11-15 | 2019-03-19 | 安徽威达环保科技股份有限公司 | A kind of sintering device flue gas SCR denitration concurrent heating and ammonia spray conglomerate integration device and technique |
| CN109316902A (en) * | 2018-12-07 | 2019-02-12 | 国电科学技术研究院有限公司 | Multi-point rotary dissipates whirlpool and is mixed stream multi-pollutant advanced purification system |
| CN109316902B (en) * | 2018-12-07 | 2023-06-09 | 国家能源集团科学技术研究院有限公司 | Multi-point cyclone vortex mixing flow equalizing multi-pollutant deep purifying system |
| CN114225690A (en) * | 2021-12-03 | 2022-03-25 | 国家能源集团新能源技术研究院有限公司 | Ammonia spraying device, ammonia spraying equipment and ammonia spraying method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 211101 Room 401, No. 1, Huashen Avenue, Yuhua District, Nanjing, Jiangsu Province Patentee after: Guoneng Longyuan environmental protection Nanjing Co.,Ltd. Address before: 210061, Room 401, apartment 2, Nanjing hi tech Development Zone, Nanjing, Pukou, Jiangsu Patentee before: NANJING LONGYUAN ENVIRONMENT Co.,Ltd. |
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| CP03 | Change of name, title or address |