Online measurement methods for flue gas flow in SCR denitrification system

YU Fengping; LI Qingyi; ZHAO Jinlong; HU Daqing

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Online measurement methods for flue gas flow in SCR denitrification system

Thermal Power Generation Vol. 45, Issue 2, Pages: 101-104(2016)

更新时间：2025-09-28

- Online measurement methods for flue gas flow in SCR denitrification system
- 作者机构：
  
  浙江天地环保工程有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： X773
- Published：2016
- 稿件说明：
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YU Fengping, LI Qingyi, ZHAO Jinlong, et al. Online measurement methods for flue gas flow in SCR denitrification system[J]. Thermal Power Generation, 2016, 45(2): 101-104.
DOI：

YU Fengping, LI Qingyi, ZHAO Jinlong, et al. Online measurement methods for flue gas flow in SCR denitrification system[J]. Thermal Power Generation, 2016, 45(2): 101-104. DOI：

摘要

在燃煤锅炉选择性催化还原(SCR)烟气脱硝工艺中

烟气流量测量的准确性对供氨量的控制具有重要影响。由于脱硝烟道截面大、直段较短、烟气含尘量较高

使得烟气流量测量难度较大。本文采用多点阵列式差压流量在线测量的方法

对某330MW机组锅炉脱硝烟气流量进行在现测试

将理论计算和在线测量与实际测量数据进行对比得出

理论计算值与实际测量值偏差较大

而在线测量值与实际测量值较吻合

在330 MW机组负荷下在线测量

偏差为5.36%。多点阵列式差压流量在线测量更适用于SCR脱硝烟气流量测量

能够使脱硝系统控制和监测更为准确。

Abstract

In selective catalytic reduction(SCR)denitrification process in coal-fired power units

the precision of flue gas flow plays an important role in control of ammonia injection.It is difficult to measure the flue gas flow precisely in short straight ducts of large cross-section area with high concentration of dust in the flue gas.A theory method based on coal-fired calculation and an online multi-flowmeter based on differential pressure is put forward.Moreover

this method was applied in in-situ measurement of flue gas from the denitration system of a 330 MW unit boiler.The application results show that

at unit load of 330 MW

the deviation between the online measured value and the actual measured is 5.36%

which is small

verifying this multi-flowmeter is more feasible for the flue gas flow measurement and allows the denitrification system to provide more precise control and monitoring.

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