Analysis of Seal Retrofitting of Rotary Air Preheater of Boiler for 300 MW Unit

Based upon the causes analysis of high air leakage rate of rotary air preheaters of boiler for 300 MW unit, combined with the maintenance experience in recent years, a series of retrofitting for rotary air preheater are conducted. The air leakage rate reduced obviously after the retrofitting, and the expectations of the modifications are achieved.