CN206631438U - The efficient ammonia-gas spraying device of SCR denitration - Google Patents
The efficient ammonia-gas spraying device of SCR denitration Download PDFInfo
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- CN206631438U CN206631438U CN201720368361.0U CN201720368361U CN206631438U CN 206631438 U CN206631438 U CN 206631438U CN 201720368361 U CN201720368361 U CN 201720368361U CN 206631438 U CN206631438 U CN 206631438U
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Abstract
The efficient ammonia-gas spraying device of SCR denitration provided by the utility model; belong to environmental protection technical field; including spray ammonia house steward, spray ammonia branch pipe and flue; spray ammonia branch pipe is located in flue; spray ammonia branch pipe includes an inlet and an outlet; the entrance for spraying ammonia branch pipe is fixedly connected with spray ammonia house steward; the outlet of spray ammonia branch pipe is installed with nozzle; direction from entrance to outlet on spray ammonia branch pipe is installed with shunting adjustable valve and pressure sensor successively, and shunting adjustable valve, pressure sensor and nozzle are respectively positioned in flue；The feed end of spray ammonia house steward is provided with total flow regulating valve, the feed end and total flow regulating valve for spraying ammonia house steward are respectively positioned on outside flue.The utility model is respectively arranged with shunting adjustable valve and pressure sensor at each nozzle, the pressure size sensed according to pressure sensor shunts the aperture of adjustable valve to adjust, and then control the ammonia spraying amount of nozzle, ammonia and the mixed uniformly purpose of nitrogen oxides are finally reached, ensures that SCR denitration reaches preferable denitration efficiency.
Description
Technical field
The utility model belongs to environmental protection technical field, especially relates to a kind of efficient ammonia-gas spraying device of SCR denitration.
Background technology
Main component is nitrogen oxides in coal-burning boiler and the tail gas of similar device discharge.Nitrogen oxides is that air is mainly dirty
One of thing is contaminated, SCR (SCR) gas denitrifying technology, due to its efficiency high, stable performance, is widely used at present
In engineering both domestic and external, turn into the mainstream technology of generating plant flue gas removing nitrogen oxides.SCR cardinal principles are to use liquefied ammonia or ammoniacal liquor
As reducing agent, sprayed into after it is mixed with air in the upstream flue of SCR reactors, in the presence of catalyst with flue gas
Nitrogen oxides carry out reaction and generate nontoxic, free of contamination nitrogen and water.
At present, the SCR denitration ammonia-gas spraying device for using and selling both at home and abroad is made up of multiple spray ammonia pipes mostly, each to spray ammonia pipe
The upper multiple nozzles of distribution, but an only flow control valve on each spray ammonia pipe.Because nitrogen oxides distribution is uneven in flue
Even, this structure can not adjust the ammonia spraying amount of each nozzle, can not ensure ammonia amount that each nozzle sprays whether with the position
Amount of nitrogen oxides match, therefore cannot ensure that ammonia mixes with the uniform of nitrogen oxides in flue.And only according to flue
The distribution situation of interior nitrogen oxides can be only achieved ammonia and the mixed uniformly purpose of nitrogen oxides, Cai Nengbao to adjust the straying quatity of ammonia
Card SCR denitration reaches preferable denitration efficiency, avoids the waste of ammonia.And excess of ammonia can generate hydrogen sulfate ammonia with sulfur trioxide
And the equipment corroded or block SCR denitration device downstream.
Therefore being needed badly among prior art wants a kind of new technical scheme to solve this problem.
Utility model content
Technical problem to be solved in the utility model is：There is provided a kind of SCR denitration efficient ammonia-gas spraying device, it is existing for solving
There is equipment each to spray and there was only a flow control valve on ammonia pipe, it is impossible to ensure ammonia and the mixed uniformly technology of nitrogen oxides in flue
Problem.
The efficient ammonia-gas spraying device of SCR denitration provided by the utility model, including spray ammonia house steward, spray ammonia branch pipe and flue, its
In, spray ammonia branch pipe is located in flue, and spray ammonia branch pipe includes an inlet and an outlet, and the entrance for spraying ammonia branch pipe connects with spraying ammonia house steward and fixing
Connect, the outlet of spray ammonia branch pipe is installed with nozzle, and the direction from entrance to outlet on spray ammonia branch pipe is installed with successively
Adjustable valve and pressure sensor are shunted, shunting adjustable valve, pressure sensor and nozzle are respectively positioned in flue；And spraying
The feed end of ammonia house steward is provided with total flow regulating valve, and the feed end and total flow regulating valve for spraying ammonia house steward are respectively positioned on outside flue.
Furthermore it is preferred that scheme be spray ammonia branch pipe, shunting adjustable valve, the quantity all same of pressure sensor and nozzle,
And it is at least two.
Additionally, it is preferred that scheme be, spray ammonia branch pipe be evenly distributed in flue.
Furthermore preferable scheme is, nozzle is set back to the flue gas flow direction in flue.
By above-mentioned design, the utility model can bring following beneficial effect：
The utility model is respectively arranged with shunting adjustable valve and pressure sensor at each nozzle, according to pressure sensor sense
The pressure size that should be arrived shunts the aperture of adjustable valve to adjust, and then controls the ammonia spraying amount of nozzle, is finally reached ammonia and nitrogen oxygen
The mixed uniformly purpose of compound, ensure that SCR denitration reaches preferable denitration efficiency, avoid the waste of ammonia, effectively prevent simultaneously
The corrosion of upstream device or the generation of blockage problem；In addition, each nozzle of the present utility model is back to the flue gas stream in flue
To setting, the abrasion that this structure can reduce nozzle blocks probability, extends the service life of nozzle.
Brief description of the drawings
The utility model is further described below in conjunction with the drawings and specific embodiments：
Fig. 1 is the structural representation of the efficient ammonia-gas spraying device of the utility model SCR denitration.
In figure：1- spray ammonia house steward, 2- total flows regulating valve, 3- spray ammonia branch pipe, 4- shuntings adjustable valve, 5- pressure sensings
Device, 6- nozzles, 7- flues.
Embodiment
As shown in figure 1, the efficient ammonia-gas spraying device of SCR denitration provided by the utility model, including：Spray ammonia house steward 1, total flow is adjusted
Save valve 2, spray ammonia branch pipe 3, shunting adjustable valve 4, pressure sensor 5, nozzle 6 and flue 7；Wherein, spray ammonia branch pipe 3 and be located at flue
In 7, spray ammonia branch pipe 3 is included an inlet and an outlet, and the entrance for spraying ammonia branch pipe is fixedly connected with spray ammonia house steward 1, the outlet of spray ammonia branch pipe 3
Nozzle 6 is fixedly mounted, 3 shunting adjustable valve 4 and pressure are fixedly mounted from entrance to the direction of nozzle 6 successively on spray ammonia branch pipe
Sensor 5, shunting adjustable valve 4 are used for the ammonia spraying amount for adjusting nozzle 6, and pressure sensor 5 is used for the pressure for sensing the position of nozzle 6
Size, shunting adjustable valve 4, pressure sensor 5 and nozzle 6 are respectively positioned in flue 7.
One total flow regulating valve 2 is set in the feed end of spray ammonia house steward 1, total flow regulating valve 2 is used to control spray ammonia total
Amount, the feed end and total flow regulating valve 2 of spray ammonia house steward 1 are respectively positioned on outside flue 7.
The quantity all same of ammonia branch pipe 3, shunting adjustable valve 4, pressure sensor 5 and nozzle 6 is sprayed, is two or two
More than individual, all spray ammonia branch pipes 3 are evenly distributed in flue 7, and each nozzle 6 is set back to the flue gas flow direction in flue 7,
The abrasion of nozzle 6 can be reduced and block probability, extend the service life of nozzle 6.
For a spray ammonia branch pipe 3 and pressure sensor 5 and nozzle 6 on the spray ammonia branch pipe 3, passed according to pressure
The pressure size for the position of nozzle 6 that sensor 5 senses shunts the aperture of adjustable valve 4 to adjust, and then controls the spray ammonia of nozzle 6
Amount, all spray ammonia branch pipes 3, shunting adjustable valve 4, pressure sensor 5 and nozzle 6 so work, is finally reached ammonia and nitrogen
The mixed uniformly purpose of oxide.
Claims (4)
1. a kind of efficient ammonia-gas spraying device of SCR denitration, it is characterized in that：Including spray ammonia house steward (1), ammonia branch pipe (3) and flue (7) are sprayed,
Wherein, the spray ammonia branch pipe (3) is located in the flue (7), and the spray ammonia branch pipe (3) includes an inlet and an outlet, the spray ammonia
The entrance of branch pipe (3) is fixedly connected with the spray ammonia house steward (1), and the outlet of the spray ammonia branch pipe (3) is installed with nozzle
(6), the direction from entrance to outlet on the spray ammonia branch pipe (3) is installed with shunting adjustable valve (4) and pressure successively
Sensor (5), shunting adjustable valve (4), the pressure sensor (5) and the nozzle (6) are respectively positioned on the flue (7)
It is interior；And the feed end of the spray ammonia house steward (1) is provided with total flow regulating valve (2), the charging of the spray ammonia house steward (1)
End and the total flow regulating valve (2) are respectively positioned on the flue (7) outside.
2. the efficient ammonia-gas spraying device of SCR denitration according to claim 1, it is characterized in that：It is described spray ammonia branch pipe (3), described point
The quantity all same of flow control valve (4), the pressure sensor (5) and the nozzle (6), and be at least two.
3. the efficient ammonia-gas spraying device of SCR denitration according to claim 2, it is characterized in that：The spray ammonia branch pipe (3) is uniformly distributed
In the flue (7).
4. the efficient ammonia-gas spraying device of SCR denitration according to any one of claim 1-3, it is characterized in that：Nozzle (6) back of the body
Flue gas flow direction in the flue (7) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720368361.0U CN206631438U (en) | 2017-04-10 | 2017-04-10 | The efficient ammonia-gas spraying device of SCR denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720368361.0U CN206631438U (en) | 2017-04-10 | 2017-04-10 | The efficient ammonia-gas spraying device of SCR denitration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206631438U true CN206631438U (en) | 2017-11-14 |
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ID=60247324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720368361.0U Active CN206631438U (en) | 2017-04-10 | 2017-04-10 | The efficient ammonia-gas spraying device of SCR denitration |
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| CN (1) | CN206631438U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110813048A (en) * | 2019-12-02 | 2020-02-21 | 中科聚信洁能热锻装备研发股份有限公司 | Flue gas denitration device and control method thereof |
-
2017
- 2017-04-10 CN CN201720368361.0U patent/CN206631438U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110813048A (en) * | 2019-12-02 | 2020-02-21 | 中科聚信洁能热锻装备研发股份有限公司 | Flue gas denitration device and control method thereof |
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