Flue flow field optimization of flue gas denitration system in 1000 MW unit

TIAN Yuanrun; MA Jianyu

doi:10.19666/j.rlfd.201709268

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Flue flow field optimization of flue gas denitration system in 1000 MW unit

Thermal Power Generation Vol. 47, Issue 6, Pages: 50-56(2018)

更新时间：2025-09-28

- Flue flow field optimization of flue gas denitration system in 1000 MW unit
- 作者机构：
  
  1. 云南农业大学资源与环境学院
  2. 国电江苏电力有限公司谏壁发电厂
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201709268
  CLC： X701
- Published Online：06 June 2018，
  
  Published：2018
- 稿件说明：
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TIAN Yuanrun, MA Jianyu. Flue flow field optimization of flue gas denitration system in 1000 MW unit[J]. Thermal Power Generation, 2018, 47(6): 50-56.
DOI：

TIAN Yuanrun, MA Jianyu. Flue flow field optimization of flue gas denitration system in 1000 MW unit[J]. Thermal Power Generation, 2018, 47(6): 50-56. DOI： 10.19666/j.rlfd.201709268.

摘要

对某1 000 MW机组锅炉选择性催化还原(SCR)烟气脱硝系统反应器内烟气流场进行数值模拟

并对氨喷射系统进行优化。利用CFD(computational fluid dynamics)模块进行流体数值模拟

对脱硝系统的气流分布状况进行分析研究

采用分区式驻涡喷氨优化装置

在原脱硝系统的基础上

通过设置双排涡流混合装置

对烟道截面实现分区域的喷氨控制

可显著改善氨气分布不均现象

提高喷氨控制调节性

从而提高脱硝效率

降低氨逃逸量。结果表明

优化后SCR反应器出口NO_x分布偏差大幅降低

验证了该优化方案的有效性。

Abstract

In this study

the numerical simulation of the flue flow field in the selective catalytic reduction(SCR)reactor of a 1 000 MW boiler is carried out and the ammonia injection system is optimized. By using the Computational Fluid Dynamics module for fluid numerical simulation

the airflow distribution of the denitration system is analyzed and studied. Using partition type vortex ammonia injection optimized device

on the basis of the original denitration system

the flue section has realized the control of the ammonia injection by setting the double row eddy mixing device. This can significantly improve the uneven distribution of ammonia gas and the controllability of ammonia injection control so as to improve the denitration efficiency and reduce the ammonia escape. The optimization results show that the distribution deviation of NO_x concentration at the export of SCR reactor is greatly reduced

which verifies the effectiveness of the optimization scheme.

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