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Water-cooled air atomizing spray gun suitable for denitration adopting SNCR method

An atomizing spray gun, cold air technology, applied in spray devices, separation methods, liquid spray devices and other directions, can solve the problems of unstable nozzle performance, short service life, poor reliability, etc., to achieve wide applicability and operability, Avoid high temperature corrosion and bonding, easy to replace and repair the effect

Active Publication Date: 2014-06-11
HUANENG CLEAN ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned defects in the prior art, the object of the present invention is to provide a water-cooled air atomizing spray gun suitable for SNCR denitrification, so as to solve the problem of easy burnout, blockage, short service life and reliable reliability when the spray gun is applied to the SNCR denitrification system of CFB boiler The problem of poor performance and large amount of compressed air for cooling, the invention can avoid the technical problems that the nozzle performance is unstable, easy to burn out, and easy to block when the nozzle is in the high-temperature, high-corrosion, and high-wear smoke environment for a long time, and effectively improves the nozzle performance. service life

Method used

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  • Water-cooled air atomizing spray gun suitable for denitration adopting SNCR method
  • Water-cooled air atomizing spray gun suitable for denitration adopting SNCR method

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0017] A water-cooled air atomization spray gun suitable for SNCR denitrification, including a spray gun body and a spray assembly, the spray gun body includes an outer sleeve 1, an inner sleeve 2, a cooling water inlet port 4, a cooling water outlet port 3, and a water pipe head 16 , supporting structure 15, supporting structure sealing gasket 18, kinematic connection mechanism 17 and fixed flange 19; the injection assembly includes aqueous solution pipe 5, aqueous solution pipe joint 6, air pipe 7, air pipe joint 8, nozzle joint 10, liquid cap 9, Liquid cap sealing gasket 11, air cap 12, air cap sealing gasket 14.

[0018] Outer casing 1 coated with high-temperature wear-resistant layer is provided with a fixed flange 19, the outer casing 1 and inner casing 2 are connected by welding, the inner casing 2 is provided with a cooling water inlet 4, and the outer casing...

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PUM

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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 [0001] The invention belongs to the technical field of selective non-catalytic reduction (SNCR) denitrification application technology for circulating fluidized bed (CFB) boilers, and in particular relates to a water-cooled air atomization spray gun suitable for SNCR denitrification. Background technique [0002] SNCR denitrification technology is suitable for CFB boilers. SNCR denitrification technology is to spray denitrification reducing agent (urea solution, ammonia water, etc.) X A selective reduction reaction occurs, and the product is H 2 O and N 2 , to achieve reduced NO X discharge purpose. [0003] The spray gun is one of the core equipment of the SNCR denitrification system, and the stability of the spray gun performance is the key to ensure that the reducing agent aqueous solution and the flue gas are fully mixed. At present, the existing spray guns used in the SNCR denitrification system mainly include the following types: mechanical atomiza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/56B01D53/79B05B9/03
Inventor 高洪培王海涛王鹏利张继瑞刘彬肖平蒋敏华
Owner HUANENG CLEAN ENERGY RES INST
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