600MW机组锅炉空气预热器密封系统的技术改造

Air preheater airproof system alter ation countermeasure and economic analysis of homemade 600MW unit boiler

详细分析了元宝山发电厂三分仓回转式空气预热器密封系统漏风率偏大的根本原因,并根据运行中所暴露的问题,以豪顿的VN密封技术为指导,提出密封系统改造的基本方案。改造后漏风率由23%-25%降为7%以下,显著提高了机组运行的可靠性和经济性.

The paper analyzes in detail the radi cal reason of high leak rate for air pr eheater airproof system in yuanbaoshan power plant and facing t o the exposed problems in operation,brings forward the radical project o f airproof system alteration directe d by Howden's VN airproof technique.After alteration,the air leak rate d ropped from 23%～25%to 7%below,enhance the economic performance of unit operation is enhanced remarkably.it can be the reference for other enterp rise when alteration.