Directing against the outlet pressure drop in slurry-recirculating pump of desulphurization system no.2 in Zhanjiang Electric Power Co Ltd

the causes have been analysed.It is preliminarily believed that the main causes leading to pressure drop of the slurry-recirculating pump are corrosion and abrasion of the impeller blades

and repair has been carried out by adopting corresponding measures.But it is found from further analysis that the corrosion and abrasion make the volume loss of leak-proof suction ring to be enlarged

and being a more important cause resulting in pressure drop of said slurry-recirculating pump.Through repair of two tines

the outlet pressure of said slurry-recircularing pump has been enhanced about 30 kPa.