摘要
对大唐徐塘发电有限责任公司300 MW机组锅炉回转式空气预热器存在漏风率偏大的问题进行了分析,认为漏风偏大主要由运行中转子径向膨胀大于冷端膨胀,以及转子中心轴向上膨胀,使转子产生蘑菇状变形,扇形板与转子端面密封间隙变大引起。对回转式空气预热器进行了柔性接触式密封技术改造,改造后漏风率由12%下降为5.5%,效果明显,达到了改造的预期目的。
The problem of high air leakage rate existing on rotary air preheater of boielr for 300 MW u- nit in Xutang Power Generation Co Ltd has been analysed. It is believed that the main causes leading to high air leakage are as follows：the radial expansion of rotor in operation is larger than the cold end ex- pansion; the axial expansion of rotor centre makes the rotor to produce mushroom - shaped deforma- tion;the sealed gap between segment plate and the end- face of rotor being increased. The rotary air preheater has been retrofitted to adopt contacting type flexible seal. After retrofitting,the air leakage rate has reduced from 12% to 5 %, having remarkable effectiveness, reaching the expected purpose of retrofit.
出处
《热力发电》
CAS
北大核心
2009年第8期73-75,共3页
Thermal Power Generation
