循环流化床锅炉省煤器磨损原因分析及解决措施.pdfVIP

学兔兔 第6期 锅 炉 制 造 NO．6 2010年11月 BOILER MANUFACTURING NOV．2010 文章编号：CN23—1249(2010)06—0007～04 循环流化床锅炉省煤器磨损原因 分析及解决措施 林 伟，龚 斌，王宗勇，冯 颖 (沈阳化工学院机械学院，辽宁沈阳110142) 摘 要：分析一台220 t／h循环流化床锅炉省煤器磨损原因，主要是省煤器区烟气流速偏高、烟气中颗粒浓度 偏高、烟气流道流通截面的不均匀性对省煤器管的影响，并提出了相应的解决措施：减少省煤器管列数，增大 换热管直径，扩大管间距，增加烟道深度；在碎煤机前加筛选装置；改用灰份含量≤38％的煤；增大旋风分离器 排气管插入深度；更换新省煤器、外墙板；在省煤器的全部列管弯头上安装防磨护瓦 经改造后省煤器未发 生因磨损问题引起的爆管情况。 关键词：循环流化床锅炉；省煤器；磨损；解决措施 中图分类号：TK223．33 文献标识码：A The Reason Analysis and Modification Measures on Abrasion of CFB Boiler Economizer Lin Wei，Go Bin，Wang Zongyong， Ying (Shenyang Institute of Chemical Technology，Shenyang 1 10142，China) Abstract：We analyzed the reason on abrasion of a 220t／h CFB boiler economizer．It was mainly caused by these following facts：the higher flow speed of flue gas in economizer，higher particle con— centration in flue gas，the flow across with different size in flue gas pass．Then the related measures were made：we reduced the tube arrays and enlarged the tube diameter and the spacing of the econo— mizer，deepened the flue gas pass，mounted a screen unit at the inlet of coal crusher，adopted coal of ash content less than 38％ ，increased the inserting depth of cyclone vent tube，replaced the new e- conomizer and wall plate，added anti—wearing tiles at elbows of all the tubes．After modification，the economizer has been in continuous operation without tube rupture because of abration problem． Key words：CFB boiler；economizer；abrasion；modification measures