The paper introduces design features and equipment selection of dry and wet ash handling system,taking a certain 2×1 000 MW unit project as an example,compares its economy,and puts forward some comments for reference.

This paper introduces water filled intermittent removal ash hopper and removal ash control system, indicates problems and give the measures of resolving these problems.

Through the contrasting with wet slag extraction system,the advantages of dry slag extracton system were explained,and the problems needed to pay attention in system design and equipment selection were pointed out.

This paper introduces the application facts of dry slag removed system of 330 MW unit boiler in Huai\'an cogeneration power plant,analyzes the technical application results and points out the main problem while operation,then finds out the mean to resolve it.

In order to improve the economic and social benefit of the enterprise,this article puts forward the scheme of technical modification for wet dedusting in boiler from the point of view of the satisfying pro-duction and lowering the cost.

According to the problem of the short life of impellers manufactured by the traditional methods used in the wet dedusting system, whether using the aerofoil blades or the single plate blades, the solution of adopting aerofoil blades treated with foaming is pointed out in this paper.