CN103170231A - Spray gun specially for selective non-catalytic reduction (SNCR) denitration process - Google Patents
Spray gun specially for selective non-catalytic reduction (SNCR) denitration process Download PDFInfo
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- CN103170231A CN103170231A CN2013101245340A CN201310124534A CN103170231A CN 103170231 A CN103170231 A CN 103170231A CN 2013101245340 A CN2013101245340 A CN 2013101245340A CN 201310124534 A CN201310124534 A CN 201310124534A CN 103170231 A CN103170231 A CN 103170231A
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Abstract
The invention discloses a spray gun specially for a selective non-catalytic reduction (SNCR) denitration process. The spray gun comprises an inner spraying pipe and an outer spraying pipe, wherein the outer spraying pipe has an integral sealing pipe structure, and the head of the outer spraying pipe is provided with an outer nozzle; the inner spraying pipe is arranged in the outer spraying pipe, and the head of the inner spraying pipe is provided with an inner nozzle; the tail end of the outer spraying pipe is provided with a compressed air inlet; and the tail end of the inner spraying pipe is provided with a reducing agent inlet. The spray gun has a good atomization effect through secondary atomization; and meanwhile, by adoption of the double-layer sleeve structure, the outer spraying pipe has the integral sealing pipe structure, the inner nozzle can be prevented from being impacted and deformed by dust particles in a high-temperature environment, and the service life is prolonged.
Description
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Technical field
The invention belongs to cement denitrification apparatus technical field, relate in particular to the spray gun special of selective non-catalytic reduction (SNCR).
Background technology
During " 12 ", nitrogen oxide is put into the binding indicator system first, and total emission volumn will cut down 10%.And in China, the discharge capacity of cement industry nitrogen oxide has been to occupy thermal power generation, motor vehicle exhaust emission the 3rd discharging rich and influential family afterwards.At present feasible denitration technology is SNCR (selective non-catalytic reduction), SCR(selective catalytic reduction) and dore furnace grading combustion technology (comprise that flame is cooling, low NO, sectional combustion, interpolation mineralizer etc.).
Wherein, SNCR technique is the most widely used technology of whole world cement denitration, become solution as reducing agent after mostly adopting ammoniacal liquor or using urea by dissolving, in the temperature range of 900 ℃ of left and right, ammoniacal liquor is evenly distributed in flue, complete fast chemical reaction under hot environment, NOx is decomposed generation nitrogen G﹠W.Denitration efficiency can reach 50～75%, have even up to 80%.To generally acknowledge in the world at present the most successful method of denitration.
The atomizing effect of spray gun is one of core technology of SNCR technique, obtain denitration effect preferably, must be evenly distributed in ammoniacal liquor in flue at suitable temperature, and the atomizing effect of spray gun is better, more easily obtains high denitration efficiency.Simultaneously, because the spray gun of SNCR technique is to use for a long time, and be subject in air-flow washing away of a large amount of dust granules under the environment of 850 ℃～1050 ℃, as easy as rolling off a logly make the spray gun distortion, thereby reduce the use atomizing effect of spray gun.Cause the denitration effect of SNCR technique to descend, even there is no effect.
Summary of the invention
Goal of the invention: for the problem and shortage of above-mentioned existing existence, the purpose of this invention is to provide a kind of SNCR denitrating technique spray gun special, this spray gun has better atomizing effect, and longer service life.
Technical scheme: for achieving the above object, the present invention by the following technical solutions: a kind of SNCR denitrating technique spray gun special, comprise inner nozzle and outer nozzle, described outer nozzle is whole tube sealing structure, and head is provided with outer nozzle; Described inner nozzle is located in outer nozzle, and head is provided with inner nozzle, and described outer nozzle tail end is provided with the compressed air inlet, and described inner nozzle tail end is provided with the reducing agent entrance.
Spray gun in the technical program adopts double-layer sleeve structure, and compressed air enters spray gun from the compressed air inlet, and ammoniacal liquor enters spray gun from the reducing agent entrance; At gun head, after ammoniacal liquor forms atomization gas through inner nozzle, then pushed to outer nozzle by the motive force of compressed air generation, the place forms secondary-atomizing at outer nozzle, thereby improves atomizing effect.Outer nozzle is whole tube sealing structure in addition, and without any connector, can effectively avoid Yin Wendu alternately change the distortion that produces and become flexible phenomenon, has longer service life under hot environment.
Such scheme is further improved, and described inner nozzle and inner nozzle adopt and removably connect, thereby can be convenient for changing inner nozzle.
Further, described outer nozzle head is circular-arc, and outer nozzle is the spray orifice that is located at circular-arc head, thereby makes the effect of atomizing more even.
As preferably, described inner nozzle and for the distance between nozzle be 8～12mm.
Further improve, the tail end cover of described outer nozzle has three-way pipe, and described inner nozzle runs through the supervisor of this three-way pipe, and the junction of inner nozzle and three-way pipe is provided with sealing ring cylindraceous simultaneously; The arm of described three-way pipe arranges the compressed air inlet.When thereby the sealing effectiveness between raising inner nozzle and outer nozzle prevents from revealing, can also conveniently adjust the relative position between inner nozzle head and outer nozzle head, effectively improve the atomizing effect of spray gun.
Beneficial effect: compared with prior art, the present invention has the following advantages: have better atomizing effect by secondary-atomizing; Adopt simultaneously double-layer sleeve structure, outer nozzle is whole tube sealing structure, can prevent that inner nozzle is out of shape by the dust granule impact in hot environment, has extended service life.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is fundamental diagram of the present invention.
Wherein, inner nozzle 1, outer nozzle 2, inner nozzle 3, outer nozzle 4, compressed air inlet 5, reducing agent entrance 6, three-way pipe 7, sealing ring 8.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiment only is used for explanation the present invention and is not used in and limits the scope of the invention, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present invention.
as shown in Figure 1, a kind of SNCR denitrating technique spray gun special, adopt double-layer sleeve structure, it comprises inner nozzle 1 and outer nozzle 2, described outer nozzle 2 is whole tube sealing structure, its head is circular-arc, and be provided with spray orifice as the outer nozzle 4 of secondary-atomizing, the tail end outer wall cover of described outer nozzle 2 has three-way pipe 7 simultaneously, described inner nozzle 1 runs through the supervisor of three-way pipe 7 and is located in outer nozzle 2, and its head is provided with dismountable inner nozzle 3, this inner nozzle 3 is near outer nozzle 4, and when both distances are 10mm, has best atomizing effect, compressed air inlet 5 is set on the arm of described three-way pipe 7.And the junction of inner nozzle 1 and three-way pipe 7 is provided with rubber seal 8, plays sealing function, and tail end is provided with the reducing agent entrance 6 of logical ammoniacal liquor.
As shown in Figure 2, filled arrows is the ammoniacal liquor direction of motion, and hollow arrow is the compressed air direction of motion.Ammoniacal liquor is delivered to inner nozzle 3 places through inner nozzle 1, is subjected to the effect of nozzle, forms primary atomization.Compressed air enters through outer nozzle 2, mixes with ammoniacal liquor in inner nozzle 3 exits, by compressed-air actuated motive force, the ammoniacal liquor after atomizing through outer tube nozzle place, is formed the secondary-atomizing effect.Product result of use of the present invention and inner nozzle 3 atomizing effects have considerable influence, because inner nozzle 3 is in mobile compressed air, have avoided and the contacting of high temperature and dust, and can effectively keep the service life of inner nozzle 3.Next is inner nozzle 3 and outer tube exit relative position, can reach by the change of regulating its relative position the purpose that changes atomizing effect.Flow because outer nozzle 2 has compressed air, inner nozzle 1 temperature is relatively low, can guarantee ammoniacal liquor can safe transport to nozzle.
In sum, product of the present invention (cement SNCR denitration spray gun special) uses under new dry process rotary kiln high temperature with high dust environment, but critical component and actual parameter can be avoided the such environmental effects of high temperature, high dust, reach the purpose of permanently effective maintenance atomizing effect, extend product service life, reduce operating cost.
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Claims (5)
1. SNCR denitrating technique spray gun special, it is characterized in that: comprise inner nozzle (1) and outer nozzle (2), described outer nozzle (2) is whole tube sealing structure, and head is provided with outer nozzle (4); Described inner nozzle (1) is located in outer nozzle (2), and head is provided with inner nozzle (3), and described outer nozzle (2) tail end is provided with compressed air inlet (5), and described inner nozzle (1) tail end is provided with reducing agent entrance (6).
2. SNCR denitrating technique spray gun special according to claim 1, it is characterized in that: described inner nozzle (3) adopts with inner nozzle (1) and removably connects.
3. SNCR denitrating technique spray gun special according to claim 1, it is characterized in that: described outer nozzle (2) head is circular-arc, outer nozzle (4) is for being located at the spray orifice of circular-arc head.
4. SNCR denitrating technique spray gun special according to claim 1 is characterized in that: described inner nozzle (3) and for the distance between nozzle be 8～12mm.
5. the meaning spray gun special is crossed in the SNCR denitration according to claim 1, it is characterized in that: the tail end cover of described outer nozzle (2) has three-way pipe (7), the supervisor that described inner nozzle (1) runs through this three-way pipe (7), inner nozzle (1) is provided with sealing ring cylindraceous (8) with the junction of three-way pipe (7) simultaneously; The arm of described three-way pipe (7) arranges compressed air inlet (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101245340A CN103170231A (en) | 2013-04-10 | 2013-04-10 | Spray gun specially for selective non-catalytic reduction (SNCR) denitration process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101245340A CN103170231A (en) | 2013-04-10 | 2013-04-10 | Spray gun specially for selective non-catalytic reduction (SNCR) denitration process |
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| CN103170231A true CN103170231A (en) | 2013-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013101245340A Pending CN103170231A (en) | 2013-04-10 | 2013-04-10 | Spray gun specially for selective non-catalytic reduction (SNCR) denitration process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103623958A (en) * | 2013-12-12 | 2014-03-12 | 江西恒大高新技术股份有限公司 | Small-space coating spray gun |
| WO2015035709A1 (en) * | 2013-09-15 | 2015-03-19 | 中国科学院过程工程研究所 | Two-stage atomizing double fluid spraying device |
| CN105127024A (en) * | 2015-09-10 | 2015-12-09 | 何宗霖 | Raw oil gun with spray form adjustable |
| CN107983129A (en) * | 2017-11-27 | 2018-05-04 | 常州五王电机有限公司 | A kind of SNCR denitration high temperature resistant spray gun |
| CN116173699A (en) * | 2023-03-02 | 2023-05-30 | 北京亿玮坤节能科技有限公司 | Small nozzle energy-saving high-efficiency desulfurization system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4434942A1 (en) * | 1994-09-30 | 1996-04-04 | Noell Abfall & Energietech | Flue gas treatment |
| CN201760232U (en) * | 2010-08-30 | 2011-03-16 | 天津渤海环保工程有限公司 | Spray gun type double-flow nozzle for denitration of smoke |
| CN202638273U (en) * | 2012-06-11 | 2013-01-02 | 杭州浙大天元科技有限公司 | Low-gas-consumption bubble atomizing spray gun suitable for selective non-catalytic reduction (SNCR) denitration technology |
| CN202823144U (en) * | 2012-07-30 | 2013-03-27 | 浙江天蓝环保技术股份有限公司 | Spray gun used for selective non-catalytic reduction (SNCR) and SNCR-selective catalytic reduction (SCR) denitration |
| CN203170210U (en) * | 2013-04-10 | 2013-09-04 | 南京西普水泥工程集团有限公司 | Special spray gun for SNCR (Selective Non-Catalytic Reduction) denitration process |
-
2013
- 2013-04-10 CN CN2013101245340A patent/CN103170231A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4434942A1 (en) * | 1994-09-30 | 1996-04-04 | Noell Abfall & Energietech | Flue gas treatment |
| CN201760232U (en) * | 2010-08-30 | 2011-03-16 | 天津渤海环保工程有限公司 | Spray gun type double-flow nozzle for denitration of smoke |
| CN202638273U (en) * | 2012-06-11 | 2013-01-02 | 杭州浙大天元科技有限公司 | Low-gas-consumption bubble atomizing spray gun suitable for selective non-catalytic reduction (SNCR) denitration technology |
| CN202823144U (en) * | 2012-07-30 | 2013-03-27 | 浙江天蓝环保技术股份有限公司 | Spray gun used for selective non-catalytic reduction (SNCR) and SNCR-selective catalytic reduction (SCR) denitration |
| CN203170210U (en) * | 2013-04-10 | 2013-09-04 | 南京西普水泥工程集团有限公司 | Special spray gun for SNCR (Selective Non-Catalytic Reduction) denitration process |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015035709A1 (en) * | 2013-09-15 | 2015-03-19 | 中国科学院过程工程研究所 | Two-stage atomizing double fluid spraying device |
| CN103623958A (en) * | 2013-12-12 | 2014-03-12 | 江西恒大高新技术股份有限公司 | Small-space coating spray gun |
| CN105127024A (en) * | 2015-09-10 | 2015-12-09 | 何宗霖 | Raw oil gun with spray form adjustable |
| CN107983129A (en) * | 2017-11-27 | 2018-05-04 | 常州五王电机有限公司 | A kind of SNCR denitration high temperature resistant spray gun |
| CN116173699A (en) * | 2023-03-02 | 2023-05-30 | 北京亿玮坤节能科技有限公司 | Small nozzle energy-saving high-efficiency desulfurization system |
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Application publication date: 20130626 |