Analysis of the Influence of Partial Blockage of Air Preheater on Boiler Combustion and Its Countermeasures and Causes  

作　　者：ZHANGChao 

机构地区：[1]JiangsuHuaiyinPowerGenerationCo.,Ltd.,HuaianJiangsu223001,China

出　　处：《外文科技期刊数据库(文摘版)工程技术》2022年第2期156-161,共6页

摘　　要：Based on the local blockage of air preheater of #4 boiler and its influence on boiler combustion, the paper analyzes the causes of local blockage of air preheater and adopts necessary countermeasures and treatment methods to slow down the aggravation of local blockage of air preheater and ensure the safe operation of boiler. During the subsequent overhaul of Unit #4, on-site inspection shall be conducted on the corrosion and damage of the air preheater heat exchange elements, and the processes such as repair of the air preheater flexible seal, cleaning of heat exchange elements, modification of flue gas deflector at the inlet of denitration reaction zone, and replacement of denitration catalyst shall be followed throughout. After the overhaul of Unit #4, tests such as ammonia injection leveling optimization and ammonia escape rate at denitration outlet were conducted. Through the collection, comparison and analysis of a large amount of data during the test period, the experience is summarized and detailed measures are formulated to avoid the recurrence of air preheater blockage.

关 键 词：air preheater BLOCKAGE ANALYSIS DENITRATION 

分 类 号：TB[一般工业技术]