The serious wornout problems were commonly existing on slurry pumps in limestone/gypsum wet desulphurization systems.The designed structure

wornout situation

and wornout causes of imported slurry pumps for units no.1 and no.2 in Guohua Yuedian Taishan Power Generation Co Ltd have been presented

and the bases and measures for retrofit by localization being put forward

i.e.adopting GGH 36 stainless alloy for the flow-passage pieces

designing the reasonable revolutionary speed

thickening the front and rear protecting plates

the shroud of volute

and the impellers etc.

as well as adopting double-shell design for the slurry pumps

replacing periodically flow-passage pieces in the inner shell.After retrofitting

the economic efficiency of units is obviously enhanced

the operation of said system being stabilized.