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Turbulent flow ammonia spraying grating in boiler flue gas denitration system

A technology of boiler flue gas and ammonia injection grid, which is applied in injection devices, gas treatment, injection devices, etc., can solve the problems of small diffusion range of ammonia/air mixed gas, short service life of nozzles, poor mixing uniformity, etc., and achieve Ensure long-term safe and stable operation, prolong service life and improve mixing effect

Inactive Publication Date: 2017-05-31
SICHUAN CHUANGUO BOILER
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] 1. The mixing uniformity of ammonia / air mixture gas and flue gas is poor;
[0004] 2. The spraying direction of the nozzle is consistent with the flow direction of the flue gas, and the nozzle nozzle is in the vortex area of ​​the flue gas, the nozzle is easy to wear, easy to be blocked by dust accumulation, and the service life of the nozzle is short;
[0005] 3. The diffusion range of the ammonia / air mixed gas ejected from the nozzle is small, and the mixing range with the flue gas accounts for a small proportion of the flue cross section

Method used

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  • Turbulent flow ammonia spraying grating in boiler flue gas denitration system

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Such as Figures 1 to 3 As shown, a turbulent ammonia injection grid in a boiler flue gas denitrification system includes a grid main pipe 1, a grid branch pipe 2 and a nozzle 3, and the nozzle 3 is welded to the upper half of the grid branch pipe 2, An annular spoiler 4 is welded on the nozzle 3, and the annular spoiler 4 is perpendicular to the nozzle 3 and is located at the upper end of the nozzle 3, wherein the grille main pipe 1, the grille branch pipe 2 and the nozzle 3 The quantity can be set according to the actual flue size and flue gas volume. Here, two grille main pipes 1 and six grille branch pipes 2 are designed, and each grille branch pipe 2 is equipped with 7 nozzles 3, each The nozzles 3 on the grid branch pipe 2 are arranged staggered left and right, the angle α between the nozzles 3 and the flow direction of the flue gas is 10°-45°, and the an...

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Abstract

The invention relates to the technical field of boiler flue gas denitration equipment, and discloses a turbulent flow ammonia spraying grating in a boiler flue gas denitration system. The turbulent flow ammonia spraying grating comprises a grating header pipe, a grating branch pipe and a nozzle, wherein the nozzle is installed on an upper half part of the grating branch pipe, and provided with an annular turbulent flow piece, and the annular turbulent flow piece is vertical to the nozzle. The turbulent flow ammonia spraying grating improves the mixed uniformity degree of ammonia gas / air mixture and flue gas, and prolongs the service life of the nozzle simultaneously.

Description

technical field [0001] The invention relates to the technical field of boiler flue gas denitrification equipment, in particular to a flow-disturbing ammonia injection grid in a boiler flue gas denitrification system. Background technique [0002] In order to protect the environment and prevent pollution, boiler flue gas needs to be denitrified, and the core technology of boiler flue gas SCR denitrification is the diffusivity of reducing agent ammonia and the uniformity of the mixed gas composed of ammonia / air and flue gas. The mixing uniformity of gas / air mixture and flue gas is one of the key factors affecting the denitrification efficiency. At present, the mainstream ammonia injection device for boiler flue gas SCR denitrification is the ammonia injection grid (AIG). The existing ammonia injection grid The grid has the following problems: [0003] 1. The mixing uniformity of ammonia / air mixture gas and flue gas is poor; [0004] 2. The spraying direction of the nozzle is...

Claims

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Application Information

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IPC IPC(8): B01D53/90B01D53/56B05B13/02B05B1/34
CPCB01D53/90B01D53/8631B01D2251/2062B01D2258/0283B05B1/34B05B13/0278
Inventor 李军政杨青兰牟江云尹凤陈巍张炜
Owner SICHUAN CHUANGUO BOILER
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