Spraying ammonia flow control system of SCR denitration system based on leading factor analysis

LI Gang; JIA Xiaojing; WU Baohui; NIU Guoping; XUE Dayu

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Spraying ammonia flow control system of SCR denitration system based on leading factor analysis

更新时间：2025-09-28

- Spraying ammonia flow control system of SCR denitration system based on leading factor analysis
- Thermal Power Generation Vol. 45, Issue 8, Pages: 99-103(2016)
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： X701
- Published：2016
- 稿件说明：
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LI Gang, JIA Xiaojing, WU Baohui, et al. Spraying ammonia flow control system of SCR denitration system based on leading factor analysis[J]. Thermal power generation, 2016, 45(8): 99-103.
DOI：

LI Gang, JIA Xiaojing, WU Baohui, et al. Spraying ammonia flow control system of SCR denitration system based on leading factor analysis[J]. Thermal power generation, 2016, 45(8): 99-103. DOI：

摘要

针对目前选择性催化还原(SCR)烟气脱硝控制系统中存在喷氨量控制不精确、大滞后等问题

分析了影响喷氨量控制效果的主要原因

通过对反应器入口NOx质量浓度进行主导因素分析

确定影响反应器入口NOx质量浓度的主要因素

在此基础上建立了反应器入口NO_x质量浓度的预测模型

并将其应用于烟气脱硝系统喷氨量控制。应用结果表明:通过主导因素分析确定的运行参数能够提前预测反应器入口NOx质量浓度的变化;改进后SCR烟气脱硝系统喷氨量控制效果良好;当脱硝反应器入口NO_x质量浓度发生较大波动时

反应器出口NOx质量浓度与设定值最大偏差不超过5mg/m3。

Abstract

In view of the inaccurate ammonia spray amount and large delay problems occured during operation of SCR denitrification control systems

the main factor affecting the ammonia spraying amount control are analyzed.The main influence factors are determined by leading factor analysis on NOxconcentration at the SCR reactor entrance.On this basis

the prediction model of NOxformation at the SCR reactor entrance was established and introduced into the ammonia spraying flow control system.The practical engineering application shows that

the operating parameters determined by the leading factor analysis can predict the change of NOxconcentration

and the ameliorated control system can effectively improve the control characteristics of the SCR denitrification system.The NOxconcentration at the SCR reactor outlet is still in good control effect when the NOxconcentration at the SCR reactor entrance has a large fluctuation.

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