INCREASING HERMETICITY OF AIR PREHEATER IN COAL-FIRED POWER PLANT
热力发电2009年38卷第6期 页码:56-57
作者机构:
华能榆社电厂
作者简介:
基金信息:
DOI:
中图分类号:TK223.34
纸质出版:2009
稿件说明:
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李建红. 空气预热器密封性改造[J]. 热力发电, 2009,38(6):56-57.
LI Jian-hong Huaneng Yushe Power Plant. INCREASING HERMETICITY OF AIR PREHEATER IN COAL-FIRED POWER PLANT[J]. Thermal power generation, 2009, 38(6): 56-57.
李建红. 空气预热器密封性改造[J]. 热力发电, 2009,38(6):56-57.DOI:
LI Jian-hong Huaneng Yushe Power Plant. INCREASING HERMETICITY OF AIR PREHEATER IN COAL-FIRED POWER PLANT[J]. Thermal power generation, 2009, 38(6): 56-57.DOI:
空气预热器密封性改造
摘要
华能榆社电厂2×300MW机组锅炉空气预热器(空预器)存在转子卡涩、密封片磨损严重、漏风率大等问题
分析认为主要由转子热变形引起。为此
对2台机组空预器进行了柔性接触式密封改造
改造后空预器漏风率从20%以上下降到3%~5%
效果明显。
Abstract
Problem of lage air-leakage rate in air preheater of boilers for 2×300 MW units in Huaneng Yushe Power Plant has resulted from the following causes:unsmooth jamming of the rotor;severe worn-out of the sealing strips;frequent replacement of said sealing strips;poor reliability of the automatic control system for air-leakage etc.Through analysis
it is believed that the air-leakage is mainly resulted from heat distortion of the rotor.Regarding to this
the air preheaters of said two units have been retrofitted with flexible contact sealings.After retrofitting
the air-leakage rate of air preheater has decreased from above 20% to 3%~5%