The 600-800 type centrifugal desulfurization slurry cycling pump in a 600 MW unit applies conical sealing rings

which had intense and regular vibrations during work

affecting normal operation of the desulfurization system.Therefore

the CFD software was adopted to simulate the velocity distribution and pressure distribution of the two-phase flow in the pumps.Moreover

the impeller wearing ring was retrofitted by installing a buffle plat.After the transformation

numerical simulation on flow field inside the pump was carried out

with the ring gap of 3mm and 6mm

respectively.The results show that

the vibration of the slurry pump operation reduced dramatically.