WEAR REDUCTION DEVICE FOR ROTARY SOLIDS HANDLING EQUIPMENT

摘要

A pump for solids handling is provided having a suction liner in combination with an impeller. The suction liner has a spiral design. The impeller has forward curved impeller suction side pump out vanes. The suction liner spiral design and the forward curved impeller suction side pump out vanes are configured to handle solids having a weight concentration (Cw) < about 40% and/or a solids size distribution < about 200 microns, and to exclude abrasive solids from an impeller/suction side liner gap by increasing the resistance to slurry flow from a high pressure area at the periphery of the impeller, and expel the solids that do manage to enter the impeller/suction side liner gap by guiding the solids away from a suction eye of the impeller, so abrasive erosion is substantially prevented and a tight clearance is substantially maintained at the impeller/suction side liner gap between the impeller and the suction liner.