CN208177213U - A kind of ammonia injection apparatus - Google Patents
A kind of ammonia injection apparatus Download PDFInfo
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- CN208177213U CN208177213U CN201820264878.XU CN201820264878U CN208177213U CN 208177213 U CN208177213 U CN 208177213U CN 201820264878 U CN201820264878 U CN 201820264878U CN 208177213 U CN208177213 U CN 208177213U
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- negative pressure
- pressure cylinder
- mixing tube
- pipe
- straight line
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Abstract
The utility model discloses a kind of ammonia injection apparatus comprising main pipe, several branch pipes being arranged on main pipe are equipped with an injector on every branch pipe；Ammon entry hole is provided on main pipe；The injector includes negative pressure cylinder, is connected with mixing tube in one end of negative pressure cylinder, offers air entry on the cylinder of negative pressure cylinder；Injection pipe is installed in the other end of negative pressure cylinder, injection pipe is inserted into the inner cavity of negative pressure cylinder along the axis of negative pressure cylinder, the one end of injection pipe being located at outside negative pressure cylinder forms injection entrance, one end of injection pipe towards mixing tube is formed with jet exit, and jet exit is more than air entry on the direction towards mixing tube.The device can effectively improve the mixing uniformity of denitrfying agent and flue gas.
Description
Technical field
The utility model relates to the ammonia-gas spraying devices for denitrating flue gas, and in particular to a kind of ammonia injection apparatus.
Background technique
Currently, ammonium hydroxide or ammonia as denitrfying agent are usually used ammonia-spraying grid and are injected in flue, with flue gas into
Row mixing, and then removes the nitrogen oxides in flue gas, be injected to denitrfying agent in flue by natural diffuseness mode with
Flue gas is mixed, and to improve the uniformity that denitrfying agent is mixed with flue gas, generally before entering Benitration reactor, needs to be arranged one
The longer flue mixed for denitrfying agent and flue gas of section, but in the transformation of many denitration of boiler smoke, space is narrower
It is small, be not suitable for setting for the flue that denitrfying agent and flue gas mix, keep the mixing uniformity of denitrfying agent and flue gas inadequate, influence to take off
Nitre effect.
Utility model content
A kind of in order to solve the above problems, the utility model proposes ammonia injection apparatus, which can effectively improve de-
The mixing uniformity of nitre agent and flue gas, specific technical solution are as follows:
A kind of ammonia injection apparatus comprising main pipe, several branch pipes being arranged on main pipe are installed on every branch pipe
There is an injector；Ammon entry hole is provided on main pipe；
The injector includes negative pressure cylinder, is connected with mixing tube in one end of negative pressure cylinder, opens up on the cylinder of negative pressure cylinder
There is air entry；Injection pipe is installed in the other end of negative pressure cylinder, injection pipe is inserted into the inner cavity of negative pressure cylinder along the axis of negative pressure cylinder,
The one end of injection pipe being located at outside negative pressure cylinder forms injection entrance, and one end of injection pipe towards mixing tube, which is formed with, ejects
Mouthful, jet exit is more than air entry on the direction towards mixing tube.
When the utility model is used, it will be entered in main pipe as the ammonia of denitrfying agent or ammonium hydroxide from ammon entry hole, then
It is assigned in a branch pipe, is then injected in flue from injector, in injector, denitrfying agent is sprayed from injection pipe, makes to bear
Negative pressure is formed in pressure cylinder, the flue gas in flue enters in negative pressure cylinder from air entry, and in mixing tube, denitrfying agent and denitrfying agent are total
It is mixed, form mixed flue gas, mixed flue gas from mixing tube after spraying, pressure release, make mixed flue gas rapidly with the cigarette of surrounding
Gas is mixed, so that denitrfying agent entrained in mixed flue gas be made to be mixed with more flue gases, keeps denitrfying agent fast
It is evenly distributed in flue gas fastly.
Further, the medial surface of the mixing tube is a surfaces of revolution, and the inner cavity of mixing tube has a throat, along negative pressure cylinder
Axis direction, the throat of the jet exit face mixing tube of injection pipe, and the internal diameter of throat are greater than the internal diameter of jet exit.It is preferred that
Ground, the bus of the medial surface of the mixing tube include first straight line section, second straight line section and connection first straight line section and second
Arc section between straightway has an angle between first straight line section and second straight line section.Preferably, first straight line Duan Yu
Angle between two straightways is 140-155 °.
Flue gas can be effectively reduced in above-mentioned design and denitrfying agent is formed by the resistance of mixed flue gas, improves mixed flue gas
There are bigger diffusion kinetics after spraying mixing tube.
For the abrasive resistance for improving mixing tube, ceramic layer is coated on the medial surface of mixing tube.Containing big in flue gas
The tiny dust of amount, these dust can form stronger friction when by mixing tube to the inner wall of mixing tube, reduce mixing
The service life of pipe can effectively improve the abrasion-resistance of mixing tube, improve the service life of mixing tube after ceramic layer is arranged.
Further, the injection pipe includes straight pipe and conical section interconnected, and the big end of conical section is connected to straight tube
Duan Shang, the small end of conical section are formed with the jet exit.After conical section is set, denitrfying agent can be made in the process by injection pipe
In, the raising that flow velocity can be relatively uniform improves denitrfying agent stability with higher after spraying from jet exit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of an embodiment of the present invention.
Fig. 2 is the structure diagram of injector.
Specific embodiment
Refering to fig. 1, a kind of ammonia-spraying grid comprising main pipe 11, several branch pipes 12 being arranged on main pipe 11, at every
One injector 20 is installed on branch pipe 12；Ammon entry hole 14 is provided on main pipe 11.
Injector 20 includes negative pressure cylinder 23, mixing tube 26 is connected in one end of negative pressure cylinder 23, in the cylinder of negative pressure cylinder 23
Air entry 24 is offered on 231；Injection pipe 21, axis of the injection pipe 21 along negative pressure cylinder 23 are installed in the other end of negative pressure cylinder 23
50 are inserted into the inner cavity of negative pressure cylinder 23, and the one end of injection pipe 21 being located at outside negative pressure cylinder forms injection entrance 213, injection pipe court
21 are formed with jet exit 25 to one end of mixing tube, and jet exit 25 is more than air entry on the direction towards mixing tube 26
24。
In the present embodiment, injection pipe 21 include straight pipe 211 interconnected and conical section 212, conical section 212 it is big
End is connected on straight pipe 211, and the small end of conical section 211 is formed with above-mentioned jet exit 25.
In the present embodiment, the medial surface 265 of mixing tube 26 is a surfaces of revolution, and the inner cavity of mixing tube 26 has a throat
27, along 50 direction of axis of negative pressure cylinder 23, the throat 27 of the 25 face mixing tube of jet exit of injection pipe 21, and throat 27 is interior
Diameter D2 is greater than the internal diameter D1 of jet exit 25.Specifically in the present embodiment, the internal diameter D2 of throat 27 is the internal diameter of jet exit 25
2.5 times of D1.
The bus of the medial surface 265 of mixing tube 26 includes first straight line section 267, second straight line section 269 and connection first
Arc section 268 between straightway 267 and second straight line section 269, has between first straight line section 267 and second straight line section 269
One angle α.In the present embodiment, angle α is 150 °.In other embodiments, angle α can be selected between 140-155 °
It selects.
In the present embodiment, ceramic layer is coated on the medial surface 265 of mixing tube 26.
Claims (6)
1. a kind of ammonia injection apparatus, which is characterized in that including main pipe, several branch pipes being arranged on main pipe, in every branch
One injector is installed on pipe；Ammon entry hole is provided on main pipe；
The injector includes negative pressure cylinder, is connected with mixing tube in one end of negative pressure cylinder, suction is offered on the cylinder of negative pressure cylinder
Port；Injection pipe is installed in the other end of negative pressure cylinder, injection pipe is inserted into the inner cavity of negative pressure cylinder along the axis of negative pressure cylinder, injection
The one end of pipe being located at outside negative pressure cylinder forms injection entrance, and one end of injection pipe towards mixing tube is formed with circular eject
Mouthful, jet exit is more than air entry on the direction towards mixing tube.
2. ammonia injection apparatus according to claim 1, which is characterized in that the medial surface of the mixing tube is a rotation
The inner cavity in face, mixing tube has a throat, along the axis direction of negative pressure cylinder, the larynx of the jet exit face mixing tube of injection pipe
Portion, and the internal diameter of throat is greater than the internal diameter of jet exit.
3. ammonia injection apparatus according to claim 2, which is characterized in that the bus of the medial surface of the mixing tube includes
First straight line section, second straight line section and connection first straight line section and second straight line section between arc section, first straight line section with
There is an angle between second straight line section.
4. ammonia injection apparatus according to claim 3, which is characterized in that between first straight line section and second straight line section
Angle is 140-155 °.
5. ammonia injection apparatus according to claim 1, which is characterized in that be coated with ceramics on the medial surface of mixing tube
Layer.
6. ammonia injection apparatus according to claim 1, which is characterized in that the injection pipe includes straight tube interconnected
Section and conical section, the big end of conical section are connected on straight pipe, and the small end of conical section is formed with the jet exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820264878.XU CN208177213U (en) | 2018-02-23 | 2018-02-23 | A kind of ammonia injection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820264878.XU CN208177213U (en) | 2018-02-23 | 2018-02-23 | A kind of ammonia injection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208177213U true CN208177213U (en) | 2018-12-04 |
Family
ID=64439782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820264878.XU Active CN208177213U (en) | 2018-02-23 | 2018-02-23 | A kind of ammonia injection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208177213U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114082280A (en) * | 2020-08-07 | 2022-02-25 | 中国石油化工股份有限公司 | Mixing cover |
-
2018
- 2018-02-23 CN CN201820264878.XU patent/CN208177213U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114082280A (en) * | 2020-08-07 | 2022-02-25 | 中国石油化工股份有限公司 | Mixing cover |
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