Design optimization of ammonia injection grid in SCR denitrification system

TANG Yuanqiang1; WU Guojiang2; ZHAO Liang3 1.Pan Asia Technical Automotive Center Co.

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Design optimization of ammonia injection grid in SCR denitrification system

Thermal Power Generation Vol. 42, Issue 3, Pages: 58-62(2013)

更新时间：2025-09-28

- Design optimization of ammonia injection grid in SCR denitrification system
- 作者机构：
  
  1. 泛亚汽车技术中心有限公司
  2. 上海交通大学机械与动力工程学院
  3. 沪东中华造船(集团)有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： X701
- Published：2013
- 稿件说明：
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TANG Yuanqiang1, WU Guojiang2, ZHAO Liang3 1.Pan Asia Technical Automotive Center Co.. Design optimization of ammonia injection grid in SCR denitrification system[J]. Thermal Power Generation, 2013, 42(3): 58-62.
DOI：

TANG Yuanqiang1, WU Guojiang2, ZHAO Liang3 1.Pan Asia Technical Automotive Center Co.. Design optimization of ammonia injection grid in SCR denitrification system[J]. Thermal Power Generation, 2013, 42(3): 58-62. DOI：

摘要

以某发电机组锅炉烟气脱硝系统SCR装置为研究对象

利用数值模拟的方法

研究SCR装置导流板优化布置后

喷孔直径和喷氨速度对催化层入口截面上氨气浓度分布的影响。研究表明

减小喷氨格栅喷孔直径

增加喷孔数量

有利于NH3与烟气均匀混合

综合考虑成本因素后该系统最优喷孔直径取30mm;随喷氨格栅Ⅰ、Ⅱ区喷氨速度差值的增大

NH3浓度偏差先减小后增加

该系统Ⅰ、Ⅱ区最优喷氨速度设为17.0、11.0m/s。

Abstract

Taking the SCR device in boiler gas denitrification system of a unit as the object

numerical simulation was adopted to investigate the influence of orifice diameter and ammonia injection speed on ammonia concentration distribution at cross section of catalyst layer entrance

on the basis of baffle arrangement optimization for SCR device.The ammonia injection grid(AIG) design was optimized to improve the uniformity of gas and ammonia concentration distribution.The results showed that

decrease in AIG orifice diameter and increase in orifice number did great help to the mixing of NH3 and gas;the best orifice diameter should be 30 mm.With an increase in ammonia injection speed deviation between region Ⅰ and Ⅱ

the NH3 concentration deviation first dropped and then rose;the optimal ammonia injection speed at region Ⅰ and Ⅱ should be 17.0 m/s and 11.0 m/s

respectively.

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