CN206897179U - A kind of anti-blocking efficient ammonia-gas spraying device of adverse current for SCR denitration system ammonia-spraying grid - Google Patents
A kind of anti-blocking efficient ammonia-gas spraying device of adverse current for SCR denitration system ammonia-spraying grid Download PDFInfo
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- CN206897179U CN206897179U CN201720491104.6U CN201720491104U CN206897179U CN 206897179 U CN206897179 U CN 206897179U CN 201720491104 U CN201720491104 U CN 201720491104U CN 206897179 U CN206897179 U CN 206897179U
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Abstract
It the utility model is related to a kind of anti-blocking efficient ammonia-gas spraying device of the adverse current for SCR denitration system ammonia-spraying grid, including spray ammonia branch pipe, it is characterised in that：Reversal nozzle is provided with the spray ammonia branch pipe, the ammonia-gas spraying device also includes small-sized vortex mixer, and the reversal nozzle is fixedly connected with the small-sized vortex mixer.The utility model is sparged into NH by the way that reversal nozzle is connected with small-sized vortex mixer3Inversely contacted with flue gas, extend incorporation time, NH can be lifted3And NOXMixed effect, preferably meet in engineering NH at first floor catalyst inlet3/NOXSpreading requirements, the nozzle inversely arranged in addition can prevent top flue from falling grey plug nozzle.
Description
Technical field
It the utility model is related to a kind of anti-blocking efficient ammonia-gas spraying device of the adverse current for SCR denitration system ammonia-spraying grid.
Background technology
NOXIt is to endanger very big and one of reluctant gaseous contaminant again, SCR（SCR）Method of denitration
Because of its technology maturation, the advantages that denitration efficiency is high, at home and abroad it is widely applied in coal fired power plant.For SCR denitration side
Method, its core technology include the penetrating of ammonia with mixing.In view of ammonia-spraying grid method can easily be accommodated it is good etc. with mixed effect
Advantage, China's SCR denitration system use ammonia-spraying grid method mostly.
The ammonia-spraying grid generally used at present is generally made up of the tube bank of spray ammonia branch pipe, and certain amount is provided with branch pipe tube bank
Aperture, and weld nipple form nozzle, nozzle direction is parallel with flue gas flow direction or forms an angle.But due to SCR denitration system
Structure of uniting and the influence of operation operation, NH3With NOXMixing typically fail to the requirement for reaching engineering design, i.e. first floor catalyst enters
Ammonia nitrogen mol ratio at mouthful（NH3/NOX）Relative deviation is not up to less than 5%.And when ammonia-spraying grid is arranged in vertical flue, by
When underload or shutdown, flue gas flow rate is low, easily falls ash, plug nozzle, so that first floor catalyst above spray ammonia branch pipe
Porch NH3/NOXRelative deviation increases, and further results in the reduction of SCR denitration system performance, and the escaping of ammonia is more acute etc. to ask
Topic.
Utility model content
The purpose of this utility model is to overcome above shortcomings in the prior art, and provides a kind of structure design and close
Reason, the anti-blocking efficient ammonia-gas spraying device of adverse current for SCR denitration system ammonia-spraying grid, the utility model can not only lift NH3With NOX
Mixed effect, while can effectively prevent spray nozzle clogging.
Technical scheme is used by the utility model solves above-mentioned technical problem：For SCR denitration system ammonia-spraying grid
The anti-blocking efficient ammonia-gas spraying device of adverse current, including spray ammonia branch pipe, it is characterised in that：Reversal nozzle is provided with the spray ammonia branch pipe,
The ammonia-gas spraying device also includes small-sized vortex mixer, and the reversal nozzle is with the small-sized vortex mixer by being connected
Device is connected.
Preferably, 10 ~ 20 reversal nozzles are arranged in the unit area of flue cross section.
Preferably, the distance between reversal nozzle exit face and the small-sized vortex mixer are reversal nozzle length
1/3 ~ 1 times.Preferably, angle is 120 ° ~ 150 ° between the direction and raw flue gas direction of the reversal nozzle.
Preferably, the axis of the reversal nozzle is perpendicular to plane, intersection point where the small-sized vortex mixer
The geometric center of the small-sized vortex mixer.
Preferably, the small-sized vortex mixer on each described reversal nozzle described in connection 1.
Preferably, the small-sized vortex mixer is connected by the device that is connected with the reversal nozzle, and weld
Connect reinforcing.
Preferably, described small-sized vortex mixer can use circular discs or set square, but it is not limited to above-mentioned
Shape.
The utility model compared with the existing technology has advantages below and effect：
1st, the anti-blocking efficient ammonia-gas spraying device of a kind of adverse current for SCR denitration system ammonia-spraying grid of the present utility model, passes through
Nozzle is inversely arranged with flue gas direction so that sprays into NH3Inversely contacted with flue gas, extend incorporation time, NH can be lifted3With
NOXMixed effect；The nozzle inversely arranged in addition can prevent top flue from falling grey plug nozzle.
2nd, the anti-blocking efficient ammonia-gas spraying device of a kind of adverse current for SCR denitration system ammonia-spraying grid of the present utility model, passes through
Small-sized vortex mixer is connected on reversal nozzle, sprayed into NH can be lifted3And NOXMixed effect, preferably meet engineering
NH at upper first floor catalyst inlet3/NOXSpreading requirements.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is a kind of embodiment of the present utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings, belong to the scope of protection of the utility model.
Fig. 1 is the anti-blocking efficiently ammonia-gas spraying device schematic diagram of the adverse current of the present utility model for SCR denitration system ammonia-spraying grid.
Label declaration：1st, small-sized vortex mixer；2nd, be connected device；3rd, reversal nozzle；4th, ammonia branch pipe is sprayed；5th, original cigarette
Gas direction.
Embodiment
Below in conjunction with the accompanying drawings and the utility model is described in further detail by embodiment, and following examples are pair
It is of the present utility model explanation and the utility model is not limited to following examples.
Embodiment：
As shown in figure 1, a kind of anti-blocking efficient ammonia-gas spraying device of adverse current for SCR denitration system ammonia-spraying grid, including spray ammonia
Branch pipe 4, described spray are provided with reversal nozzle 3 on ammonia branch pipe 4, and the ammonia-gas spraying device also includes small-sized vortex mixer 1, described inverse
It is connected to nozzle 3 and the small-sized vortex mixer 1 by the device that is connected.The cloth in the unit area of flue cross section
10 ~ 20 reversal nozzles 3 are put, the distance between reversal nozzle exit face and the small-sized vortex mixer are reversal nozzle
1/3 ~ 1 times of length.Angle is 135 ° ~ 150 ° between the direction and raw flue gas direction 5 of the reversal nozzle 3, by inversely spraying
Mouth 3, ammonia is inversely contacted with flue gas, extend the incorporation time of ammonia and flue gas, can effectively lift NH3And NOXMixing
Effect；The setting of the reversal nozzle 3 simultaneously can prevent top flue from falling grey plug nozzle.Hang down the axis of the reversal nozzle
Directly the plane where the small-sized vortex mixer, intersection point are the geometric center of the small-sized vortex mixer.Described in each
The small-sized vortex mixer 1 described in 1 is connected on reversal nozzle 3.The small-sized vortex mixer 1 by be connected device 2 with
The reversal nozzle 3 is fixedly connected, and reinforcement of weld.Described small-sized vortex mixer 1 can use circular discs or set square,
A diameter of 200 ~ the 300mm of described circular discs.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts, it is named
Title etc. can be different.The equivalent or simple change that all construction, feature and the principle described according to the utility model patent design are done,
It is included in the protection domain of the utility model patent.The utility model person of ordinary skill in the field can be to being retouched
The specific embodiment stated is made various modifications or supplement or substituted using similar mode, without departing from structure of the present utility model
Or not past scope defined in the claims, the scope of protection of the utility model all should be belonged to.
Claims (8)
1. a kind of anti-blocking efficient ammonia-gas spraying device of adverse current for SCR denitration system ammonia-spraying grid, including spray ammonia branch pipe, its feature exist
In：Reversal nozzle is provided with the spray ammonia branch pipe, the ammonia-gas spraying device also includes small-sized vortex mixer, the reversal nozzle
It is connected with the small-sized vortex mixer by the device that is connected.
2. the anti-blocking efficient ammonia-gas spraying device of the adverse current according to claim 1 for SCR denitration system ammonia-spraying grid, its feature
It is：10 ~ 20 reversal nozzles are arranged in the unit area of flue cross section.
3. the anti-blocking efficient ammonia-gas spraying device of the adverse current according to claim 1 for SCR denitration system ammonia-spraying grid, its feature
It is：The distance between the reversal nozzle exit face and the small-sized vortex mixer center for reversal nozzle length 1/3 ~
1 times.
4. the anti-blocking efficient ammonia-gas spraying device of the adverse current according to claim 1 for SCR denitration system ammonia-spraying grid, its feature
It is：Angle is 120 ° ~ 150 ° between the direction and raw flue gas direction of the reversal nozzle.
5. the anti-blocking efficient ammonia-gas spraying device of the adverse current according to claim 1 for SCR denitration system ammonia-spraying grid, its feature
It is：Perpendicular to plane where the small-sized vortex mixer, intersection point is the small-sized vortex for the axis of the reversal nozzle
The geometric center of blender.
6. the anti-blocking efficient ammonia-gas spraying device of the adverse current according to claim 1 for SCR denitration system ammonia-spraying grid, its feature
It is：Small-sized vortex mixer on each described reversal nozzle described in connection 1.
7. the anti-blocking efficient ammonia-gas spraying device of the adverse current according to claim 1 for SCR denitration system ammonia-spraying grid, its feature
It is：Described small-sized vortex mixer uses circular discs or set square.
8. the anti-blocking efficient ammonia-gas spraying device of the adverse current according to claim 7 for SCR denitration system ammonia-spraying grid, its feature
It is：A diameter of 200 ~ the 300mm of described circular discs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720491104.6U CN206897179U (en) | 2017-05-05 | 2017-05-05 | A kind of anti-blocking efficient ammonia-gas spraying device of adverse current for SCR denitration system ammonia-spraying grid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720491104.6U CN206897179U (en) | 2017-05-05 | 2017-05-05 | A kind of anti-blocking efficient ammonia-gas spraying device of adverse current for SCR denitration system ammonia-spraying grid |
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| Publication Number | Publication Date |
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| CN206897179U true CN206897179U (en) | 2018-01-19 |
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| CN201720491104.6U Active CN206897179U (en) | 2017-05-05 | 2017-05-05 | A kind of anti-blocking efficient ammonia-gas spraying device of adverse current for SCR denitration system ammonia-spraying grid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108543420A (en) * | 2018-05-15 | 2018-09-18 | 华电电力科学研究院有限公司 | A kind of adjust automatically strengthens mixing and anti-blocking ammonia-spraying grid device and its spray ammonia method simultaneously |
| CN110227342A (en) * | 2019-06-03 | 2019-09-13 | 北京中航泰达环保科技股份有限公司 | A kind of novel reverse streaming moving bed desulfuring and denitrifying apparatus and its smoke processing system |
| CN112569783A (en) * | 2019-09-30 | 2021-03-30 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Mixing device for mixing gases in a channel of rectangular cross section |
-
2017
- 2017-05-05 CN CN201720491104.6U patent/CN206897179U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108543420A (en) * | 2018-05-15 | 2018-09-18 | 华电电力科学研究院有限公司 | A kind of adjust automatically strengthens mixing and anti-blocking ammonia-spraying grid device and its spray ammonia method simultaneously |
| CN108543420B (en) * | 2018-05-15 | 2023-09-19 | 华电电力科学研究院有限公司 | Automatic-adjustment ammonia spraying grid device capable of simultaneously strengthening mixing and blocking prevention and ammonia spraying method thereof |
| CN110227342A (en) * | 2019-06-03 | 2019-09-13 | 北京中航泰达环保科技股份有限公司 | A kind of novel reverse streaming moving bed desulfuring and denitrifying apparatus and its smoke processing system |
| CN110227342B (en) * | 2019-06-03 | 2024-05-24 | 北京中航泰达环保科技股份有限公司 | Countercurrent moving bed desulfurization and denitrification device and flue gas treatment system thereof |
| CN112569783A (en) * | 2019-09-30 | 2021-03-30 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Mixing device for mixing gases in a channel of rectangular cross section |
| CN112569783B (en) * | 2019-09-30 | 2023-02-17 | 国家电投集团远达环保工程有限公司重庆科技分公司 | Mixing device for mixing gases in a channel of rectangular cross-section |
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