Comprehensive control technique of ABS blockage of air preheater in a 600 MW unit

WANG Xing; LIU Guozuo; ZHANG Zhiqiang; WANG Shuchao; BEI Guomin

doi:10.19666/j.rlfd.202005130

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Comprehensive control technique of ABS blockage of air preheater in a 600 MW unit

Thermal Power Generation Vol. 50, Issue 2, Pages: 132-137(2021)

更新时间：2025-09-28

- Comprehensive control technique of ABS blockage of air preheater in a 600 MW unit
- 作者机构：
  
  1. 国家能源集团科学技术研究院有限公司
  2. 国电河北龙山发电有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202005130
  CLC： TM621
- Published：2021
- 稿件说明：
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WANG Xing, LIU Guozuo, ZHANG Zhiqiang, et al. Comprehensive control technique of ABS blockage of air preheater in a 600 MW unit[J]. Thermal Power Generation, 2021, 50(2): 132-137.
DOI：

WANG Xing, LIU Guozuo, ZHANG Zhiqiang, et al. Comprehensive control technique of ABS blockage of air preheater in a 600 MW unit[J]. Thermal Power Generation, 2021, 50(2): 132-137. DOI： 10.19666/j.rlfd.202005130.

摘要

针对某600 MW机组烟气超低排放改造后

空气预热器(空预器)出现严重堵塞现象

提出了空预器硫酸氢铵(ABS)堵塞综合治理技术。通过分区控制格栅式喷氨系统

解决了选择性催化还原(SCR)脱硝装置氨逃逸超标问题

将空预器传热元件三段改为两段

提高了空预器吹灰的通透性

空预器ABS堵塞现象得到了根治

提高了机组运行的安全性和经济性。本文对同类型问题机组改造具有一定的借鉴意义。

Abstract

To solve the serious blockage occurred in air preheater after ultra-low emission transformation of a 600 MW unit

a set of comprehensive treatment technology for ABS blockage of the air preheater was put forward. Through the zone control grid type ammonia injection system

the problem of SCR ammonia escape exceeding the standard was solved

and the heat transfer elements with three-layer structure in the air preheater was transformed into two-layer structure

which improved the air preheater's soot blowing permeability

and the ABS blockage of the air preheater was solve completely

therefore the safety and economy of the unit operation were improved. The conclusion of this paper provides reference for the retrofit of units with the same type of problems.

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