CN202096878U - Preposed rectification static mixer in SCR denitration system - Google Patents
Preposed rectification static mixer in SCR denitration system Download PDFInfo
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- CN202096878U CN202096878U CN 201120143707 CN201120143707U CN202096878U CN 202096878 U CN202096878 U CN 202096878U CN 201120143707 CN201120143707 CN 201120143707 CN 201120143707 U CN201120143707 U CN 201120143707U CN 202096878 U CN202096878 U CN 202096878U
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- ammonia
- static mixer
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Abstract
The utility model relates to a preposed rectification static mixer in an SCR (Selective Catalyctic Reduction) denitration system. The static mixer comprises a plurality of C-shaped chips and support racks, which are mounted in a flue duct. The support racks are arranged parallelly below ammonia convey pipelines, and ammonia jet nozzles on the ammonia convey pipelines correspond to the C-shaped chips on the support racks in position. By adopting the utility model, not only the full mixing of flue and ammonia can be ensured, but also the post mixing space is saved, the mixing uniformity is improved, a great pressure drop is not caused, the conversion rate inside an SCR reactor vessel is improved, and the denitration efficiency is raised.
Description
Technical field
The utility model relates to thermal power plant or glass furnace SCR (SCR) denitrating flue gas field, particularly a kind of preposition rectification static mixer of SCR denitrating system.
Background technology
At present, the SCR gas denitrifying technology is widely used in the denitration field.Existing denitrating system flue is arranged very compact, flue gas stream skewness, flue gas generally occur and mixes unequal phenomenon with ammonia, causes that denitration efficiency is low, the escapement ratio of ammonia is big.
In order to guarantee that flue gas mixes with the even of ammonia, be provided with static mixer behind the ammonia-gas spraying device mostly, but reduced the space that flue gas mixes with ammoniacal liquor.In fact, most ammonia-gas spraying devices are positioned at the flue after the turning, and just there is the situation of skewness in the air-flow itself before the ammonia-gas spraying device of flowing through.Find through the CFD numerical simulation, the air-flow after the turning a quite long segment distance internal memory outside effluent speed be higher than inboard phenomenon, promptly outside flow is on the high side.In such environment, spray into quantitative ammonia, will exist flue gas and ammoniacal liquor to mix uneven phenomenon, directly get into the SCR reactor in the case, denitration efficiency is not high.
Therefore, need at present that design is a kind of simply, static mixer efficiently badly, flue gas and ammonia were mixed before getting into the SCR reactor, and then raising SCR denitrating flue gas efficient.
Technology contents
The purpose of the utility model is to solve the deficiency of prior art and a kind of raising denitration efficiency is provided, and reduces the escaping of ammonia rate, makes flue gas and ammonia at the preposition rectification static mixer that gets into the SCR denitrating system that the SCR reactor mixes before.
A kind of preposition rectification static mixer of SCR denitrating system; Comprise a plurality of C shape sheets and the bracing frame that are installed in the flue; Support frame as described above is set in parallel in the below of ammonia conveyance conduit, and the position at the ammonia nozzle of each said ammonia conveyance conduit on the support frame as described above is equipped with C shape sheet.
In the utility model, said C shape sheet is wrapped in said ammonia conveyance conduit and said ammonia nozzle opening direction outer and said C shape sheet is corresponding with said ammonia jet expansion direction.
In the utility model, the consistent and direction that all move of all said C shape sheet opening directions back to said flue gas.
Adopt such scheme, the utlity model has following advantage:
1, before the rectification static mixer is placed on ammonia-gas spraying device, for flue gas and mixing of ammonia provide more spaces;
2, C shape be designed with the generation that is beneficial to eddy current, pressure drop is low;
3, can play rectified action to the air-flow of skewness before the ammonia-gas spraying device of flowing through;
4, strengthen NH
3/ NO
XMixing, be beneficial to the raising denitration efficiency, reduce the escaping of ammonia rate.
In sum, adopt the utility model not only can guarantee fully mixing of flue gas and ammonia, can also save the blending space of its back; Can improve the uniformity of mixing again; And can not produce very big pressure drop, promote the conversion ratio in the SCR reactor, improve denitration efficiency.
Description of drawings
Fig. 1 is the utility model and flue front view.
Fig. 2 is axle figure such as the utility model and flue.
Fig. 3 is the structural representation of the utility model.
Fig. 4 is the utility model example structure sketch map.
In the accompanying drawing 1,2,3,4,1-ammonia nozzle, 2-ammonia conveyance conduit, 3-C shape sheet, 4-bracing frame, 5-flow deflector, 6-flue.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Like Fig. 1,3 said; The utility model is a kind of static mixer of SCR flue gas denitrification system; Comprise a plurality of C shape sheets 3 and bracing frame 4 that are installed in the flue 6; Support frame as described above 4 is set in parallel in the below of ammonia conveyance conduit 2, and support frame as described above 4 is equipped with C shape sheet 3 on the position of the ammonia nozzle 1 of each said ammonia conveyance conduit 2.Said C shape sheet 3 is wrapped in outside said ammonia conveyance conduit 2 and the said ammonia nozzle 1, and the opening direction of said C shape sheet 3 is corresponding with said ammonia nozzle 1 Way out.Consistent and the direction that all move of all said C shape sheet 3 opening directions back to said flue 6 interior flue gases.
Embodiment:
Below view shows be the integral form of the static mixer used in certain SCR of power plant denitrating flue gas; Described flue 6 is made up of air preheater outlet bend pipe (in be provided with described flow deflector 5) and vertical gas pass; For the blending space of sufficient flue gas and ammonia is provided, ammonia-gas spraying device is arranged in the vertical gas pass.Ammonia-gas spraying device adopts the described ammonia conveyance conduit 2 of four rows, and the arrangement form of 4*4 described nozzle 1 is equidistantly arranged.
Select the described C shape sheet 3 with quantity such as described nozzle 1 for use, and described C shape sheet 3 is fixed on the described bracing frame 4, described C shape sheet 3 all is consistent with the opening of described nozzle 1, more described bracing frame 4 is fixed in the flue 6.Described C shape sheet 3 all can adopt carbon steel or stainless steel material to process with described bracing frame 4.
As shown in Figure 4,2D≤d
1≤4D, 3D≤d
2≤5D, the general d that adopts in the above-mentioned scope
1=2.5D, d
2=3.5D.
Flue gas flows into flue with the direction of representing among Fig. 1.As shown in Figure 2, adjust the uniformity of flue gas with preposition rectification static mixer.Flue gas described C shape sheet 3 backs of flowing through produce the toll bar vortexs, and the ammonia that drives ejection from described nozzle 1 carries out strong disturbance, mixing.So far, in short space, accomplish two actions that mix of rectification and flue gas with the ammonia of flue gas.
The above-mentioned accompanying drawing that combines has carried out exemplary description to the utility model patent, but the concrete realization of the utility model patent does not receive the restriction of aforesaid way.As long as adopted the design of the utility model patent and the improvement of the various unsubstantialities that technical scheme is carried out; Or the design of the utility model patent and technical scheme are directly applied to other occasion without improving, all within the protection domain of the utility model patent.
Claims (3)
1. the preposition rectification static mixer of a SCR denitrating system; It is characterized in that: comprise a plurality of C shape sheets (3) and the bracing frame (4) that are installed in the flue (6); Support frame as described above (4) is set in parallel in the below of ammonia conveyance conduit (2), and support frame as described above (4) is gone up in the position of the ammonia nozzle (1) of each said ammonia conveyance conduit (2) C shape sheet (3) is installed.
2. the preposition rectification static mixer of SCR denitrating system according to claim 1 is characterized in that: said C shape sheet (3) is wrapped in said ammonia conveyance conduit (2) and said ammonia nozzle (1) opening direction outer and said C shape sheet (3) is corresponding with said ammonia nozzle (1) Way out.
3. the preposition rectification static mixer of SCR denitrating system according to claim 2 is characterized in that: the consistent and direction that all move back to the interior flue gas of said flue (6) of all said C shape sheet (3) opening directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120143707 CN202096878U (en) | 2011-05-06 | 2011-05-06 | Preposed rectification static mixer in SCR denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120143707 CN202096878U (en) | 2011-05-06 | 2011-05-06 | Preposed rectification static mixer in SCR denitration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202096878U true CN202096878U (en) | 2012-01-04 |
Family
ID=45382914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120143707 Expired - Lifetime CN202096878U (en) | 2011-05-06 | 2011-05-06 | Preposed rectification static mixer in SCR denitration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202096878U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105381715A (en) * | 2015-12-15 | 2016-03-09 | 浙江百能科技有限公司 | Counter-current ammonia spraying mixer |
-
2011
- 2011-05-06 CN CN 201120143707 patent/CN202096878U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105381715A (en) * | 2015-12-15 | 2016-03-09 | 浙江百能科技有限公司 | Counter-current ammonia spraying mixer |
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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: No. 59, nanzhuyuan Road, Changsha Economic and Technological Development Zone, Changsha City, Hunan Province Patentee after: AEROSPACE KAITIAN ENVIRONMENTAL TECHNOLOGY Co.,Ltd. Address before: 410100 Xingsha Road, Changsha Economic Development Zone, Hunan, No. 15 Patentee before: KAITIAN ENVIRONMENTAL TECH. Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120104 |
|
| CX01 | Expiry of patent term |