CN102671518B - 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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- CN102671518B CN102671518B CN201210167061.8A CN201210167061A CN102671518B CN 102671518 B CN102671518 B CN 102671518B CN 201210167061 A CN201210167061 A CN 201210167061A CN 102671518 B CN102671518 B CN 102671518B
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Abstract
一种适用于SNCR法脱硝的水冷空气雾化喷枪，内套管上设置有冷却水进水口，外套管上设置有冷却水出水口，形成冷却水的进出通道，内套管内设置有水溶液管和空气管，水溶液管和空气管7一端均设置有接头，另一端设置有喷嘴和空气帽，循环冷却水由冷却水进水接口设置有进入内套管，随枪体进入喷枪前段，最后从外套管的冷却水出水接口返回到循环水回水母管，运动连接机构通过与气缸连接，带动喷射组件伸缩，停止工作时，可以将喷射组件收回到水冷的内外套管内，确保喷嘴不被烧坏，解决了以往喷嘴长期暴露在高温烟气中易烧损的问题。
A water-cooled air atomization spray gun suitable for SNCR denitrification. The inner casing is provided with a cooling water inlet, and the outer casing is provided with a cooling water outlet to form a cooling water inlet and outlet channel. The inner casing is provided with an aqueous solution pipe and The air pipe, the water solution pipe and the air pipe 7 are provided with a joint at one end, and a nozzle and an air cap at the other end. The circulating cooling water enters the inner casing through the cooling water inlet port, enters the front section of the spray gun with the gun body, and finally flows from the outer casing. The cooling water outlet port of the pipe returns to the circulating water return jellyfish pipe, and the kinematic connection mechanism drives the injection assembly to expand and contract through the connection with the cylinder. When it stops working, the injection assembly can be retracted into the water-cooled inner and outer casings to ensure that the nozzle will not be burned. It solves the problem that the nozzle is easy to be burned when it is exposed to high-temperature flue gas for a long time in the past.
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
SNCR denitration technology is suitable for CFB boiler.SNCR denitration technology is in the situation that not adding catalyst, denitrification reducing agent (urea liquid, ammoniacal liquor etc.) is sprayed in the high-temperature flue gas (850 DEG C ~ 1150 DEG C) at burner hearth or other position, with NO
xgeneration selective reduction reaction, product is H
2o and N
2, realize and reduce NO
xdischarge object.
Spray gun is one of nucleus equipment of SNCR denitrating system, and the stable of spray gun performance is to ensure the reducing agent aqueous solution and the well-mixed key of flue gas.At present, the existing spray gun that is applied to SNCR denitrating system mainly contains following several: mechanical atomization spray gun, air atomization spray gun etc.The spray gun of the type is generally applicable to low temperature, low ash concentration or uses at high temperature, low dust concentration environment.When SNCR denitrating system is applied to CFB boiler, its outside environment for use is extremely severe, for high temperature, high flow rate, high ash concentration environment, and reductant solution has caustic corrosion, common spray gun uses with this understanding, easy burn-out, obstruction, and then cause resistance increase, nozzle flow change, atomization mixed effect variation, denitration efficiency reduction, amount of ammonia slip increase etc.The present invention has overcome the in use defect such as easy burn-out, easy obstruction of common spray gun, stability and the service life of effectively having improved spray gun.
Summary of the invention
In order to overcome the defect 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, solve that spray gun easy burn-out while being applied to CFB boiler SNCR denitrating system, obstruction, service life are short, poor reliability, cooling by the large problem of air supply, the present invention can avoid nozzle unstable, the easy burn-out of nozzle performance, susceptible to plugging technical problem in the flue gas environment of the high wearing and tearing of high temperature, 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 feature simple in structure, that maintain easily, be easy to combination installation.
In order to solve the problems of the technologies described above, the present invention adopts technical scheme to be achieved as follows:
A kind of water-cooled air atomization spray gun that is applicable to the denitration of SNCR method, comprise outer tube 1, outer tube 1 is connected with inner sleeve 2, on inner sleeve 2, be provided with cooling water intake 4, on outer tube 1, be provided with cooling water outlet 3, two sleeve pipes are combined to form the access way of cooling water by water pipe end socket 16, in inner sleeve 2, be provided with aqueous suction pipes 5 and air hose 7, one end of air hose 7 is provided with movement connecting mechanism 17, end is provided with air hose joint 8, 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, nozzle connection 10 is connected with liquid cap 9, liquid cap 9 is connected with the air cap 12 communicating with air hose 7, and the outlet of liquid cap 9 is provided with nozzle spout 13.
Described outer tube 1 scribbles 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 from inner sleeve 2 enter, outer tube 1 flows back to, effectively reduce the heat radiation of high-temperature flue gas to nozzle spout 13, movement connecting mechanism 17 can drive ejection assemblies to move, while quitting work, ejection assemblies can be recovered in the internal and external casing of water-cooled, guarantee that nozzle is not burned, 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 water collar, has avoided nozzle residual urea solution directly to contact with high temperature/high ash concentration flue gas the high temperature corrosion and the adhesion problem that cause.
3, liquid cap 9 can separate with spray gun body easily with air cap 12, 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 high-temperature wearable layer, has further ensured water-cooling welding torch operation steady in a long-term under the environment of high temperature, high ash concentration, high flow rate.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is spray gun supporting surface cross-sectional view of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
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, spray gun body comprises outer tube 1, inner sleeve 2, cooling water water inlet interface 4, cooling water water outlet mouthpiece 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 and have mounting flange 19, between outer tube 1 and inner sleeve 2, be connected by welding manner, on inner sleeve 2, be provided with cooling water intake 4, on outer tube 1, be provided with cooling water outlet 3, two sleeve pipes are combined to form the access way of cooling water by water pipe end socket 16, in inner sleeve 2, be provided with aqueous suction pipes 5 and air hose 7, one end of air hose 7 is provided with movement connecting mechanism 17, end is provided with air hose joint 8, 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, nozzle connection 10 is threaded connection with liquid cap 9, and be provided with liquid cap gasket sheet 11, liquid cap 9 is threaded connection with the air cap 12 communicating with air hose 7, and is provided with air cap gasket seal 14, the outlet of liquid cap 9 is provided with nozzle spout 13.
Between described inner sleeve 2 and aqueous suction pipes 5, be provided with supporting construction 15, guarantee distance between each pipe 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, and aqueous suction pipes 5 is aging leaks.
Operation principle of the present invention: recirculated cooling water enters inner sleeve 2 by cooling water water inlet interface 4, enter spray gun leading portion with rifle body, finally turn back to the female pipe of recirculated water backwater from the cooling water water outlet mouthpiece 3 of outer tube 1, this kind of endless form strengthened heat transfer effect, improved the cooling effect to spray gun.Movement connecting mechanism 17, by being connected with cylinder (or other movable body), drives ejection assemblies flexible, and nozzle can be adjusted thereupon, also can, in the situation that not changing nozzle outward appearance, change nozzle flow, operating pressure energy performance parameter.While quitting work, ejection assemblies can be recovered in the internal and external casing of water-cooled, guarantee that nozzle is not burned, solve the problem of nozzle long term exposure easy scaling loss in high-temperature flue gas in the past.
The present invention adopts straight barrel type design, and design length as required only need add cartridge support structure 15 in certain distance, guarantees distance between each pipe 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, be convenient to change nozzle, as long as ensure 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 to move, and while quitting work, ejection assemblies can be recovered in water collar, guarantees that nozzle is not burned.
The present invention adopts all steel design, and liquid cap gasket sheet 11 and air cap gasket seal 14 adopt stainless steel, ensured the present invention can be for a long time in high-temperature flue gas, stable use.
Claims (3)
1. one kind is applicable to the water-cooled air atomization spray gun of SNCR method denitration, it is characterized in that, comprise outer tube (1), outer tube (1) is connected with inner sleeve (2), on inner sleeve (2), be provided with cooling water intake (4), on outer tube (1), be provided with cooling water outlet (3), two sleeve pipes are combined to form the access way of cooling water by water pipe end socket (16), in inner sleeve (2), be provided with aqueous suction pipes (5) and air hose (7), one end of air hose (7) is provided with movement connecting mechanism (17), end is provided with air hose joint (8), 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), nozzle connection (10) is connected with liquid cap (9), liquid cap (9) is connected with the air cap (12) communicating 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 high-temperature wearable layer.
3. 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, outer tube (1) outer setting has mounting flange (19).
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|---|---|---|---|
| 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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| 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 CN102671518A (en) | 2012-09-19 |
| CN102671518B true CN102671518B (en) | 2014-06-11 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103212285B (en) * | 2013-05-07 | 2015-12-23 | 苏圣科技（无锡）有限公司 | A kind of Denitration urea injector |
| CN104001634B (en) * | 2014-05-23 | 2016-06-22 | 姜建勇 | Spray gun for desulphurization denitration |
| 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 |
| CN105013645B (en) * | 2015-07-29 | 2018-03-20 | 赵立志 | A kind of wear-resisting injector of pneumatic extension for SNCR denitrating flue gas |
| CN106238259B (en) * | 2016-08-30 | 2018-10-30 | 西安热工研究院有限公司 | One kind being based on transpiration-cooled SNCR spray guns and its cooling means |
| 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 |
| CN111545059A (en) * | 2020-05-09 | 2020-08-18 | 西安热工研究院有限公司 | High-temperature ammonia-spraying denitration spray gun for coal-fired boiler |
| 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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| EP1539424B1 (en) * | 2002-07-23 | 2007-05-23 | Oleg Ivanovich Grechishkin | Abrasive blasting device |
| CN201172653Y (en) * | 2007-11-23 | 2008-12-31 | 山东科技大学 | Direct cooling coal water slurry gasification nozzle with expansion section |
| CN101371969A (en) * | 2008-10-09 | 2009-02-25 | 江苏中科节能环保技术有限公司 | Reducing reagent nozzle for denitration by SNCR method |
| CN102160964B (en) * | 2011-02-18 | 2013-06-05 | 中国航天科技集团公司第六研究院第十一研究所 | Selective non-catalytic reduction (SNCR) denitration multi-nozzle long-gun injector |
| CN202179929U (en) * | 2011-08-10 | 2012-04-04 | 湖南安普诺环保科技有限公司 | Automatic spray gun retractable system of flue gas selective non-catalytic reduction denitration system |
| CN202803096U (en) * | 2012-05-25 | 2013-03-20 | 中国华能集团清洁能源技术研究院有限公司 | Water-cooling air atomizing spray gun |
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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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