CN102671518A - Water-cooled air atomizing spray gun suitable for denitration adopting SNCR method - Google Patents
Water-cooled air atomizing spray gun suitable for denitration adopting SNCR method Download PDFInfo
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- CN102671518A CN102671518A CN2012101670618A CN201210167061A CN102671518A CN 102671518 A CN102671518 A CN 102671518A CN 2012101670618 A CN2012101670618 A CN 2012101670618A CN 201210167061 A CN201210167061 A CN 201210167061A CN 102671518 A CN102671518 A CN 102671518A
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Abstract
The invention discloses a water-cooled air atomizing spray gun suitable for denitration adopting an SNCR (Selective Non-Catalytic Reduction) method. A cooling water inlet is formed on an inner sleeve, and a cooling water outlet is formed on an outer sleeve, so as to form inlet and outlet passages for cooling water; a water solution pipe and an air pipe are arranged inside the inner sleeve; connectors are arranged at one end of the water solution pipe and one end of the air pipe 7, and a spray nozzle and an air cap are arranged at the other end of the air pipe 7; recirculated cooling water enters the inner sleeve through the cooling water inlet, enters a front section of the spray gun along with a gun body, and finally returns to a circulating water return main pipe from the cooling water outlet of the outer sleeve; a movement connecting mechanism is connected with a cylinder so as to drive a spraying component to stretch out and draw back; and when the water-cooled air atomizing spray gun stops operating, the spraying component can be taken back to the inner parts of the water-cooled inner sleeve and the water-cooled outer sleeve, a spray nozzle is prevented from being burnt out, and problem, the problem that the spray nozzle is exposed in high-temperature flue gas for a long time in the past and is easy to be burnt out is solved.
Description
Technical field
The invention belongs to recirculating fluidized bed (CFB) boiler SNCR method (SNCR) denitration applied technical field, be specifically related to the water-cooled air atomization spray gun of a kind of SNCR of being applicable to method denitration.
Background technology
The SNCR denitration technology is suitable for the CFB boiler.The SNCR denitration technology is under the situation of not adding catalyst, denitrification reducing agent (urea liquid, ammoniacal liquor etc.) is sprayed in the high-temperature flue gas (850 ℃ ~ 1150 ℃) at burner hearth or other position, with NO
XGeneration selective reduction reaction, product is H
2O and N
2, realize reducing NO
XThe discharging purpose.
Spray gun is one of nucleus equipment of SNCR denitrating system, and the stable of spray gun performance is to guarantee the reducing agent aqueous solution and the well-mixed key of flue gas.At present, the existing spray gun that is applied to the SNCR denitrating system mainly contains following several kinds: mechanical atomization spray gun, air atomization spray gun etc.The spray gun of the type is applicable to that generally low temperature, low ash concentration perhaps use at high temperature, low dust concentration environment.When the SNCR denitrating system is applied to the CFB boiler; Its outside environment for use is extremely abominable; Be high temperature, high flow rate, high ash concentration environment, and reductant solution has caustic corrosion property, common spray gun uses with this understanding; Easy burn-out, obstruction, and then cause resistance increase, nozzle flow change, atomizing mixed effect variation, denitration efficiency reduction, amount of ammonia slip increase etc.The present invention has overcome common spray gun defective such as easy burn-out, easy obstruction in use, the stability and the service life of effectively having improved spray gun.
Summary of the invention
In order to overcome the defective of above-mentioned prior art; The object of the present invention is to provide the water-cooled air atomization spray gun of a kind of SNCR of being applicable to method denitration; Easy burn-out when solving spray gun and being applied to CFB boiler SNCR denitrating system, obstruction, service life weak point, poor reliability, cooling is with the big problem of air supply; The present invention can avoid nozzle nozzle performance instability, easy burn-out, susceptible to plugging technical problem in the flue gas environment of high temperature, the high wearing and tearing of high burn into for a long time, the service life of effectively having improved nozzle.The present invention can be widely used in CFBB SNCR denitration technology field, has characteristics simple in structure, that maintain easily, be easy to aggregate erection.
In order to solve the problems of the technologies described above, the present invention adopts technical scheme to realize as follows:
A kind of water-cooled air atomization spray gun that is applicable to the denitration of SNCR method comprises outer tube 1, and outer tube 1 is connected with inner sleeve 2; Inner sleeve 2 is provided with cooling water intake 4, and outer tube 1 is provided with cooling water outlet 3, two sleeve pipes are combined to form cooling water through water pipe end socket 16 access way; Be provided with aqueous suction pipes 5 and air hose 7 in the inner sleeve 2; One end of air hose 7 is provided with movement connecting mechanism 17, and end is provided with air hose joint 8, and aqueous suction pipes 5 is provided with aqueous suction pipes joint 6 with air hose 7 unidirectional ends; The other end of air hose 7 is provided with nozzle connection 10, and nozzle connection 10 is connected with liquid cap 9; Liquid cap 9 is connected with the air cap 12 that communicates with air hose 7, and the outlet of liquid cap 9 is provided with nozzle spout 13.
Described outer tube 1 scribbles the high-temperature wearable layer.
Outer tube 1 outer setting has mounting flange 19.
Compared with prior art, the present invention has the following advantages:
1, the present invention is the water-cooled air atomization spray gun of a kind of CFB of being applicable to boiler SNCR method denitration; Recirculated cooling water flows back to from inner sleeve 2 entering, outer tube 1, has effectively reduced the heat radiation of high-temperature flue gas to nozzle spout 13, and movement connecting mechanism 17 can drive ejection assemblies and move; When quitting work; Can ejection assemblies be recovered in the internal and external casing of water-cooled, guarantee that nozzle is not burnt out, solve the problem of nozzle long term exposure easy scaling loss in high-temperature flue gas in the past.
2, nozzle spout 13 is embedded in the water collar, has avoided nozzle residual urea solution directly to contact high temperature corrosion and the adhesion problem that causes with high temperature/high ash concentration flue gas.
3, liquid cap 9 can separate with the spray gun body with air cap 12 easily, and is easy to replace and maintain, makes the present invention have applicability and operability widely.
5, the present invention is a kind of water-cooled air atomization spray gun that is applicable to the denitration of CFBB SNCR method, and outer tube 1 scribbles the high-temperature wearable layer, has further guaranteed water-cooling welding torch operation steady in a long-term under the environment of high temperature, high ash concentration, high flow rate.
Description of drawings
Fig. 1 is an overall structure sketch map of the present invention.
Fig. 2 is a spray gun supporting surface cross-sectional view of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is elaborated.
A kind of water-cooled air atomization spray gun that is applicable to the denitration of SNCR method; Comprise spray gun body and ejection assemblies, the spray gun body comprises outer tube 1, inner sleeve 2, cooling water water inlet interface 4, cooling water water outlet interface 3, water pipe end socket 16, supporting construction 15, supporting construction sealing gasket 18, movement connecting mechanism 17 and mounting flange 19; Ejection assemblies comprises aqueous suction pipes 5, aqueous suction pipes joint 6, air hose 7, air hose joint 8, nozzle connection 10, liquid cap 9, liquid cap gasket sheet 11, air cap 12, air cap gasket seal 14.
Scribble high-temperature wearable layer outer tube 1 outer setting mounting flange 19 is arranged; Be connected through welding manner between outer tube 1 and the inner sleeve 2, inner sleeve 2 is provided with cooling water intake 4, and outer tube 1 is provided with cooling water outlet 3; Two sleeve pipes are combined to form the access way of cooling water through water pipe end socket 16; Be provided with aqueous suction pipes 5 and air hose 7 in the inner sleeve 2, an end of air hose 7 is provided with movement connecting mechanism 17, and end is provided with air hose joint 8; Aqueous suction pipes 5 is provided with aqueous suction pipes joint 6 with air hose 7 unidirectional ends; The other end of air hose 7 is provided with nozzle connection 10, and nozzle connection 10 and liquid cap 9 be through being threaded, and is provided with liquid cap gasket sheet 11; Liquid cap 9 and the air cap 12 that communicates with air hose 7 be through being threaded, and be provided with air cap gasket seal 14; The outlet of liquid cap 9 is provided with nozzle spout 13.
Be provided with supporting construction 15 between described inner sleeve 2 and the aqueous suction pipes 5; The distance between guaranteeing respectively to manage and the intensity of water cooled lance; Supporting construction 15 is provided with supporting construction sealing gasket 18 with aqueous suction pipes 5 contact positions, prevents long-term use, aqueous suction pipes 5 aging leaking.
Operation principle of the present invention: recirculated cooling water gets into inner sleeve 2 by cooling water water inlet interface 4; Get into the spray gun leading portion with the rifle body; Cooling water water outlet interface 3 from outer tube 1 turns back to the female pipe of recirculated water backwater at last, and this kind endless form has been strengthened the heat exchange effect, has improved the cooling effect to spray gun.Movement connecting mechanism 17 is through being connected with cylinder (or other movable body), and it is flexible to drive ejection assemblies, and nozzle can be adjusted thereupon, also can under the situation that does not change the nozzle outward appearance, change nozzle flow, operating pressure ability performance parameter.When quitting work, can ejection assemblies be recovered in the internal and external casing of water-cooled, guarantee that nozzle is not burnt out, solve the problem of nozzle long term exposure easy scaling loss in high-temperature flue gas in the past.
The present invention adopts the straight barrel type design, and design length only needs in certain distance, to add cartridge support structure 15 as required, the distance between guaranteeing respectively to manage and the intensity of water cooled lance.
The liquid cap 9 of employing activity of the present invention and the structure of air cap 12 are convenient to change nozzle, as long as guarantee that nozzle profile is consistent, the nozzle of replaceable different parameters has strengthened widely applicable property of the present invention.
Ejection assemblies of the present invention can shrink back and forth, and movement connecting mechanism 17 can drive ejection assemblies and move, and when quitting work, can ejection assemblies be recovered in the water collar, guarantees that nozzle is not burnt out.
The present invention adopts all steel design, and liquid cap gasket sheet 11 adopts stainless steels with air cap gasket seal 14, guaranteed the present invention can be for a long time in high-temperature flue gas, stable use.
Claims (3)
1. a water-cooled air atomization spray gun that is applicable to the denitration of SNCR method is characterized in that, comprises outer tube (1); Outer tube (1) is connected with inner sleeve (2); Inner sleeve (2) is provided with cooling water intake (4), and outer tube (1) is provided with cooling water outlet (3), and two sleeve pipes are combined to form the access way of cooling water through water pipe end socket (16); Be provided with aqueous suction pipes (5) and air hose (7) in the inner sleeve (2); One end of air hose (7) is provided with movement connecting mechanism (17), and end is provided with air hose joint (8), and aqueous suction pipes (5) is provided with aqueous suction pipes joint (6) with the unidirectional end of air hose (7); The other end of air hose (7) is provided with nozzle connection (10), and nozzle connection (10) is connected with liquid cap (9); Liquid cap (9) is connected with the air cap (12) that communicates with air hose (7), and the outlet of liquid cap (9) is provided with nozzle spout (13).
2. a kind of water-cooled air atomization spray gun that is applicable to the denitration of SNCR method according to claim 1 is characterized in that described outer tube (1) scribbles the high-temperature wearable layer.
3. a water-cooled air atomization spray gun that is applicable to the denitration of SNCR method is characterized in that, outer tube (1) outer setting has mounting flange (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210167061.8A CN102671518B (en) | 2012-05-25 | 2012-05-25 | Water-cooled air atomizing spray gun suitable for denitration adopting SNCR method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210167061.8A CN102671518B (en) | 2012-05-25 | 2012-05-25 | Water-cooled air atomizing spray gun suitable for denitration adopting SNCR method |
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| CN102671518A true CN102671518A (en) | 2012-09-19 |
| CN102671518B CN102671518B (en) | 2014-06-11 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212285A (en) * | 2013-05-07 | 2013-07-24 | 苏圣科技（无锡）有限公司 | Denitration urea injector |
| CN104001634A (en) * | 2014-05-23 | 2014-08-27 | 浙江莱梦德电力设备有限公司 | Spray gun for desulfurization and denitrification |
| CN104399614A (en) * | 2014-11-17 | 2015-03-11 | 南京科思得能源技术有限公司 | High-temperature self-cooling denitration spray gun |
| CN105013645A (en) * | 2015-07-29 | 2015-11-04 | 赵立志 | Pneumatic telescopic abrasion-proof ejector for SNCR(selective non-catalytic reduction) smoke gas denitration |
| CN106238259A (en) * | 2016-08-30 | 2016-12-21 | 西安热工研究院有限公司 | A kind of based on transpiration-cooled SNCR spray gun and cooling means thereof |
| CN106890530A (en) * | 2017-03-17 | 2017-06-27 | 浙江菲达环保科技股份有限公司 | A kind of wet electrical dust precipitator for reducing entrance flue gas temperature |
| CN108392960A (en) * | 2018-05-11 | 2018-08-14 | 光大环保技术研究院（南京）有限公司 | SNCR spray gun devices and garbage combustion device |
| CN111197514A (en) * | 2018-11-16 | 2020-05-26 | 福爱电子(贵州)有限公司 | High-temperature-resistant electric liquid metering nozzle |
| CN112620215A (en) * | 2020-11-30 | 2021-04-09 | 内蒙古兴洋科技有限公司 | Cleaning equipment for various clean valves of silane packing materials |
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| CN201172653Y (en) * | 2007-11-23 | 2008-12-31 | 山东科技大学 | Direct freezing type coal water slurry gasification nozzle with expanding segment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103212285A (en) * | 2013-05-07 | 2013-07-24 | 苏圣科技（无锡）有限公司 | Denitration urea injector |
| CN103212285B (en) * | 2013-05-07 | 2015-12-23 | 苏圣科技（无锡）有限公司 | A kind of Denitration urea injector |
| CN104001634A (en) * | 2014-05-23 | 2014-08-27 | 浙江莱梦德电力设备有限公司 | Spray gun for desulfurization and denitrification |
| CN104399614A (en) * | 2014-11-17 | 2015-03-11 | 南京科思得能源技术有限公司 | High-temperature self-cooling denitration spray gun |
| CN105013645A (en) * | 2015-07-29 | 2015-11-04 | 赵立志 | Pneumatic telescopic abrasion-proof ejector for SNCR(selective non-catalytic reduction) smoke gas denitration |
| CN106238259A (en) * | 2016-08-30 | 2016-12-21 | 西安热工研究院有限公司 | A kind of based on transpiration-cooled SNCR spray gun and cooling means thereof |
| CN106890530A (en) * | 2017-03-17 | 2017-06-27 | 浙江菲达环保科技股份有限公司 | A kind of wet electrical dust precipitator for reducing entrance flue gas temperature |
| CN108392960A (en) * | 2018-05-11 | 2018-08-14 | 光大环保技术研究院（南京）有限公司 | SNCR spray gun devices and garbage combustion device |
| CN111197514A (en) * | 2018-11-16 | 2020-05-26 | 福爱电子(贵州)有限公司 | High-temperature-resistant electric liquid metering nozzle |
| CN112620215A (en) * | 2020-11-30 | 2021-04-09 | 内蒙古兴洋科技有限公司 | Cleaning equipment for various clean valves of silane packing materials |
| CN112620215B (en) * | 2020-11-30 | 2023-02-03 | 内蒙古兴洋科技股份有限公司 | Cleaning equipment for various clean valves of silane packing materials |
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Owner name: CHINA HUANENG GROUP R + D CENTER Effective date: 20140103 |
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Effective date of registration: 20140103 Address after: 100098 Beijing city Haidian District No. 48 Zhichun Road Yingdu building A block 26 layer Applicant after: China Huaneng Group Clean Energy Technology Research Institute Co., Ltd. Applicant after: Huaneng Group Technology Innovation Center Address before: 100098 Beijing city Haidian District No. 48 Zhichun Road Yingdu building A block 26 layer Applicant before: China Huaneng Group Clean Energy Technology Research Institute Co., Ltd. |
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