350 MW超临界锅炉氧化皮生成、脱落机理及关键控制技术措施  

Mechanism and Key Control Measures of Oxide Scale Formation and Exfoliation in 350 MW Supercritical Power Plant Boiler

作　　者：蒙玉仓 崔振涛 MENG Yucang;CUI Zhentao(Hongsheng Electric Heating Company,Jiayuguan 735100,China)

机构地区：[1]酒钢集团宏晟电热公司,甘肃嘉峪关735100

出　　处：《锅炉技术》2022年第4期57-61,共5页Boiler Technology

摘　　要：炉管氧化皮生成、脱落在超临界机组中是一个比较普遍的问题,近年来因氧化皮脱落堵塞已造成多起锅炉爆管事故,因此对氧化皮的分析和研究具有非常重要的意义。为控制此类事故发生,减少火电厂经济损失,围绕超临界锅炉高温受热面管内氧化皮的生成、脱落机理等方面展开分析,并在此基础上提出了预防超临界锅炉因氧化皮脱落、堵塞而引起爆管的关键技术,为火力发电厂机组运行提供借鉴和参考。The formation and exfoliation of oxide scale of boiler tube is a common problem in supercritical unit.In recent years,many boiler tube burst accidents have been caused by oxide scale exfoliation and blocking.Therefore,it is of great significance to analyze and study oxide scale.In order to control such accidents and reduce economic losses of thermal power plants,this paper focuses on the formation and exfoliation mechanism of oxide scale in high temperature heating surface tubes of supercritical boilers.On this basis,the key technologies to prevent tube explosion caused by oxide scale exfoliation and blockage are proposed,which can provide reference for the operation of thermal power plants.

关 键 词：超临界机组锅炉 氧化皮 生成脱落机理 临界温度变化速率 防治关键技术 减温水 干湿态转换 

分 类 号：TK224.9[动力工程及工程热物理—动力机械及工程]