Abstract:

Abstract:At present,the generation loads of thermal power units in the domestic are generally lower than the design loads.In addition,the insufficient thermal deformation of rotary air preheater could increase the cold end air leakage,corrosion and clogging,which will reduce the boiler efficiency and increase the operation cost.For the problems above,this paper analyzed the formation mechanism of cold end air leakage of rotary air preheater and proposed a control method of combining a variety of ways from two aspects of dynamic seal and static seal.

Key words:

Keywords:rotary air preheater, cold end air leakage, dynamic seal, static seal