Application of economizer bypass on selective catalytic reduction system

DONG Chen; WANG Xiaobing; NIU Guoping

English Version Reader LoginJournal Login

您当前的位置：

首页 >

文章列表页 >

Application of economizer bypass on selective catalytic reduction system

更新时间：2025-09-28

- Application of economizer bypass on selective catalytic reduction system
- Thermal Power Generation Vol. 43, Issue 3, Pages: 96-100(2014)
- 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：2014
- 稿件说明：
移动端阅览
DONG Chen, WANG Xiaobing, NIU Guoping. Application of economizer bypass on selective catalytic reduction system[J]. Thermal power generation, 2014, 43(3): 96-100.
DOI：

DONG Chen, WANG Xiaobing, NIU Guoping. Application of economizer bypass on selective catalytic reduction system[J]. Thermal power generation, 2014, 43(3): 96-100. DOI：

摘要

由于机组低负荷运行时

选择性催化还原(SCR)烟气脱硝系统的入口烟气温度低于最低喷氨温度

会导致SCR系统无法喷氨运行。为此

需设置省煤器烟气旁路。以某火电厂600MW机组SCR系统为例

通过数值模拟的方法得到最佳省煤器烟气旁路方案

即将省煤器旁路入口设于喷氨格栅前

将部分接口伸入进口烟道内

加深高温烟气进入SCR系统水平烟道的射入距离

有利于高温烟气和低温烟气迅速混合。该方案实施后

第1层催化剂入口截面上烟气平均温度为319℃

烟气温度分布的最大偏差为2.4%

满足最低喷氨温度要求。

Abstract

To protect catalyst from ammonium sulfate/bisulfate deposition and subsequent poisoning

the minimum operation temperature at low load should not be violated.Therefore

the selective catalytic reduction(SCR)system should be down at low load.However

the exit NOxconcentration may not meet the emission standards.The application of economizer bypass is an effective way to solve this problem.Taking the SCR system of a 600MW coal-fired power plant as the example

the numerical simulation method was employed to obtain the optimum economizer bypass scheme.By using the optimum economizer bypass

the average flue gas temperature at inlet cross section of the first catalytic layer increases to 319℃

which is above the minimum operation temperature

and the maximum deviation of the flue gas temperature distribution in this cross section is 2.4%

which satisfies the minimum ammonia spraying temperature.

关键词

Keywords

references

Views

604

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

ANALYSIS AND TREATMENT OF SOMEWHAT LOWER MAIN STEAM TEMPERATURE PROBLEM FOR 2045 t/h BOILER

ESTABLISHMENT OF SERVICE LIFE MANAGEMENT SYSTEM FOR HIGH-TEMPERATURE BOILER TUBES IN THERMAL POWER PLANT BASED ON B/S STRUCTURE

CAUSE ANALYSIS OF ECONOMIZER WORN-OUT FOR A 670 t/h BOILER IN ONE POWER PLANT AND RETROFITTING DESIGN THEREOF

APPLICATION OF SCR DENITRIFICATION TECHNOLOGY ONTO COAL-FIRED BOILERS IN CHINA

STUDY ON BEHAVIOR OF CATALYCTS FOR SCR DENITRIFICATION USING DIFFERENT TiO₂ AS CARRIER

Related Author

XIANG Chunzheng

DU Bao-hua

LI Yao-jun

LIU Zhen-yu

LI Chung-min

WANG Zhong-jie

SUN Xi(Xi'an Thermal Power Reseach Institute Co.Ltd

LI Jun

Related Institution

Zhejiang Electric Power Construction Corporation

North China Electric Power University

Topso Company Beijing Representative Office

Topso Corporation

Southeast University

AI问答

⁰