CN202096879U - Front secondary rectification static mixer of SCR (silicon controlled rectifier) denitration system - Google Patents
Front secondary rectification static mixer of SCR (silicon controlled rectifier) denitration system Download PDFInfo
- Publication number
- CN202096879U CN202096879U CN 201120156133 CN201120156133U CN202096879U CN 202096879 U CN202096879 U CN 202096879U CN 201120156133 CN201120156133 CN 201120156133 CN 201120156133 U CN201120156133 U CN 201120156133U CN 202096879 U CN202096879 U CN 202096879U
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- ammonia
- secondary rectification
- rectification
- static mixer
- mixing
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Abstract
The utility model relates to a front secondary rectification static mixer of an SCR (silicon controlled rectifier) denitration system, which comprises a support frame, a plurality of primary rectification mixing plates and a plurality of secondary rectification mixing plates. The support frame is arranged in a flue, the primary rectification mixing plates and the secondary rectification mixing plates are arranged on the support frame, the support frame is arranged parallel to an ammonia delivery pipeline, the two sides of each ammonia spraying nozzle of the ammonia delivery pipeline are respectively provided with the secondary rectification mixing plates, the primary rectification mixing plates are arranged just below the ammonia spraying nozzles of the ammonia spraying delivery pipeline and are respectively arranged between each two secondary rectification mixing plates. By adopting the front secondary rectification static mixer of the SCR denitration system, full mixing of flue gas and ammonia can be ensured, the mixing space in the rear part can be saved, the mixing uniformity can be improved, no large pressure drop can be caused, and the conversion rate in an SCR reactor and the denitration efficiency can be increased.
Description
Technical field
The utility model relates to thermal power plant or Industrial Stoves SCR (SCR) denitrating flue gas field, particularly a kind of preposition secondary rectification static mixer of SCR denitrating system.
Background technology
At present, along with the attention of the mankind to environmental problem, and country is to the pilot operation of the popularization of heat-engine plant desulfurized technology, denitration technology, to following CO
2The research etc. of reduction of discharging control technology, people also constantly strengthen the improvement of air environmental pollution.To NO
XImprovement, 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 the static mixer that can make flue gas and ammonia disturbance behind the ammonia-gas spraying device mostly, but reduced the space that flue gas mixes with ammoniacal liquor, the effect of disturbance is also not really desirable.In fact, most ammonia-gas spraying devices are positioned at the flue (flue after the air preheater outlet of power plant) after the turning, and there has been the situation of skewness in the air-flow before the ammonia-gas spraying device of flowing through.Find through the CFD numerical simulation; If adopt single hybrid-type static mixer that the lifting mixed effect is arranged; But massiveness all, and in the face of the spray ammonia system be ammoniacal liquor directly spray and flue gas incoming flow inequality in, mixed once obviously just can not reach desirable effect.
Therefore, need the senior static mixer that design is a kind of simply, performance is outstanding badly at present, flue gas and ammonia were mixed before getting into the SCR reactor, and then improve 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 pressure loss that reduces static mixer is provided; Reduce the escaping of ammonia rate; Improve denitration efficiency, make flue gas and ammonia at the preposition secondary rectification static mixer that gets into the SCR denitrating system that mixes before the SCR reactor.
A kind of preposition secondary rectification static mixer of SCR denitrating system; Comprise and be installed in the bracing frame in the flue and be installed in a plurality of rectification mixing tabs and the secondary rectification mixing tab on the support frame as described above; Support frame as described above and ammonia conveyance conduit laterally arrange; The both sides of each ammonia nozzle of said ammonia conveyance conduit are equipped with said secondary rectification mixing tab, and a said rectification mixing tab is arranged under the ammonia nozzle on the said spray ammonia conveyance conduit and between two said secondary rectification mixing tabs.
In the utility model; Per two said secondary rectification mixing tabs are wrapped in outside said ammonia conveyance conduit and the said ammonia nozzle and form an import and an outlet in the vertical; Said ammonia nozzle is arranged on said outlet, and a said rectification mixing tab is arranged on said import.
In the utility model, said import is identical with the direction of flue gas operation in the said flue to the direction of outlet.
In the utility model, the smooth outer surface and the rough inner surface of said secondary rectification mixing tab.
Adopt such scheme, the utlity model has following advantage:
1, before the utility model is placed on ammonia-gas spraying device, provide more spaces to mix;
2, rectification mixing tab can play rectified action to the air-flow of skewness before the ammonia-gas spraying device of flowing through;
3, secondary rectification mixing tab play the effect of abundant rectification and mixing, and pressure drop is low;
4, strengthen NH
3/ NO
XMixing, be beneficial to the raising denitration efficiency, reduce the escaping of ammonia rate.
5, substep mixes, and effect is better.
In sum; Adopt the utility model not only can mix favourable the combination with directly mixing with vortex disturbance; And in the SCR denitrating system, given full play to the boundary layer principle; And then make the preceding flue gas of entering SCR reactor and the mist of ammonia obtain higher uniformity, and more help reacting fully at beds, reduce NO
XContent, finally reach the purpose that improves 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 air-flow traffic direction sketch map.
In the accompanying drawing 1,2,3,4,1-ammonia nozzle, 2-ammonia conveyance conduit, 3-secondary rectification mixing tab, 4-bracing frame, 5-rectification mixing tab, 6-flue, 7-flow deflector.
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 the bracing frame 4 that is installed in the flue 6 and a plurality of rectification mixing tabs 5 and secondary rectification mixing tab 3 that are installed on the support frame as described above 4; Support frame as described above 4 laterally arranges with ammonia conveyance conduit 2; The both sides of each ammonia nozzle 1 of said ammonia conveyance conduit 2 are equipped with said secondary rectification mixing tab 3, and a said rectification mixing tab 5 is arranged under the ammonia nozzle 1 on the said spray ammonia conveyance conduit 2 and between two said secondary rectification mixing tabs 3.The every pair of said secondary rectification mixing tab 3 is wrapped in that said ammonia conveyance conduit 2 and said ammonia nozzle 1 are outer and form an import and an outlet in the vertical, and said ammonia nozzle 1 is arranged on said outlet, and a said rectification mixing tab 5 is arranged on said import.Said import is identical with the direction of flue gas operation in the said flue 6 to the direction of outlet.The smooth outer surface and the rough inner surface of said secondary rectification mixing tab 3.
Embodiment:
Expression is a kind of mode that certain power plant uses the utility model in the accompanying drawing 1,2; Described flue 6 is made up of air preheater outlet bend pipe (in be provided with described flow deflector 7) 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 4 rows, and the arrangement form of 4X4 described nozzle 1 is equidistantly arranged.
Select preposition secondary rectification static mixer for use with quantity such as described nozzles 1; And described rectification mixing tab 5 and secondary rectification mixing tab 3 be fixed on the described bracing frame 4; Described secondary rectification mixing tab 3 needs through specially treated; Satisfy smooth outer surface and rough inner surface, while and described bracing frame 4 and a rectification mixing tab 5 all can adopt carbon steel or stainless steel material to process.
Flue gas flows into flue with the direction of representing among Fig. 1; Flue gas is flowed through behind a described rectification mixing tab 5 and the secondary rectification mixing tab 3; Flue gas is carried out current-sharing handle, as shown in Figure 4, flue gas is divided into two parts; Wherein a part entering and mixed once district of flue gas through a rectification mixing tab 5 after carry out secondary with another part flue gas subsequently and mix.To directly mix with vortex disturbance and mix favourable the combination, and give full play to the boundary layer principle in the SCR denitrating system.So far, in short space and in the time, efficiently 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.
Adopt the technical scheme of the utility model patent, 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.
Claims (4)
1. the preposition secondary rectification static mixer of a SCR denitrating system; It is characterized in that: comprise being installed in the bracing frame (4) in the flue (6) and being installed in a plurality of rectification mixing tabs (5) and the secondary rectification mixing tab (3) on the support frame as described above (4); Support frame as described above (4) laterally arranges with ammonia conveyance conduit (2); The both sides of each ammonia nozzle (1) of said ammonia conveyance conduit (2) are equipped with said secondary rectification mixing tab (3), and a said rectification mixing tab (5) is arranged under the ammonia nozzle (1) on the said spray ammonia conveyance conduit (2) and is positioned between two said secondary rectification mixing tabs (3).
2. the preposition secondary rectification static mixer of SCR denitrating system according to claim 1; It is characterized in that: every pair of said secondary rectification mixing tab (3) is wrapped in outside said ammonia conveyance conduit (2) and the said ammonia nozzle (1) and forms an import and an outlet in the vertical; Said ammonia nozzle (1) is arranged on said outlet, and a said rectification mixing tab (5) is arranged on said import.
3. the preposition secondary rectification static mixer of SCR denitrating system according to claim 2 is characterized in that: said import is identical with the direction of the interior flue gas operation of said flue (6) to the direction of outlet.
4. the preposition secondary rectification static mixer of SCR denitrating system according to claim 1 and 2 is characterized in that: the smooth outer surface and the rough inner surface of said secondary rectification mixing tab (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120156133 CN202096879U (en) | 2011-05-16 | 2011-05-16 | Front secondary rectification static mixer of SCR (silicon controlled rectifier) denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120156133 CN202096879U (en) | 2011-05-16 | 2011-05-16 | Front secondary rectification static mixer of SCR (silicon controlled rectifier) denitration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202096879U true CN202096879U (en) | 2012-01-04 |
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ID=45382915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120156133 Expired - Lifetime CN202096879U (en) | 2011-05-16 | 2011-05-16 | Front secondary rectification static mixer of SCR (silicon controlled rectifier) denitration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202096879U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103894082A (en) * | 2014-03-03 | 2014-07-02 | 东南大学 | Gas mixer arranged in gas channel and gas mixing device composed of gas mixer |
| CN109289573A (en) * | 2018-10-16 | 2019-02-01 | 中国华电科工集团有限公司 | A kind of gas mixer and method applied to denitrating system |
| CN110833761A (en) * | 2019-12-05 | 2020-02-25 | 安徽顺达环保科技股份有限公司 | Leading SCR denitrification facility of industrial kiln flue gas |
-
2011
- 2011-05-16 CN CN 201120156133 patent/CN202096879U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103894082A (en) * | 2014-03-03 | 2014-07-02 | 东南大学 | Gas mixer arranged in gas channel and gas mixing device composed of gas mixer |
| CN109289573A (en) * | 2018-10-16 | 2019-02-01 | 中国华电科工集团有限公司 | A kind of gas mixer and method applied to denitrating system |
| CN109289573B (en) * | 2018-10-16 | 2024-04-05 | 中国华电科工集团有限公司 | Gas mixing device and method applied to denitration system |
| CN110833761A (en) * | 2019-12-05 | 2020-02-25 | 安徽顺达环保科技股份有限公司 | Leading SCR denitrification facility of industrial kiln flue gas |
| CN110833761B (en) * | 2019-12-05 | 2021-09-03 | 安徽顺达环保科技股份有限公司 | Leading SCR denitrification facility of industrial kiln flue gas |
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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, 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 |