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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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,

Method used

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

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

[0023] Such as Figure 1 to 3 As shown, a turbulent ammonia injection grid in a boiler flue gas denitration 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 part of the grid branch pipe 2. An annular spoiler 4 is welded on the nozzle 3. The annular spoiler 4 is perpendicular to the nozzle 3 and is located at the upper end of the nozzle 3. Among them, the grid manifold 1 and the grid branch pipe 2 and the nozzle 3 The number can be set according to the actual flue size and flue gas volume. Here are two grille header pipes 1 and six grille branch pipes 2. Each grille branch pipe 2 is provided with 7 nozzles 3, each The nozzles 3 on the grid branch pipe 2 are arranged in a staggered arrangement, the angle α between the nozzles 3 and the flue gas flow direction is 10°~45°, where the angle α is designed to be 25°, and the dia...

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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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