Slurry Impeller Erosion
Slurry Impeller Erosion
(OP)
We have a 1750 rpm 1600 gpm 314 ft HD horizonatl open impeller slurry pump that is eroding impellers every 300-400 hrs. The slurry is bottom ash from a coal plant. I just started at this company and have yet to seen a failed impeller, but I am told that the fins basically erode away to the point where the pump is unable to maintain prime. The pump is pumping from a sump where the level fluctautes, consequently the pump routinely pumps below the suction pipe (8ft) and loses prime. I suspect that at 8 ft the pump may also be running into cavitation.
The mechanics have tried many different materials on the impeller with little change. They are leaning towards installing a new pumping system, is there anything that should be tried before looking at a new pumping system? If not what could be done in new pumping system to eliminate this?
The mechanics have tried many different materials on the impeller with little change. They are leaning towards installing a new pumping system, is there anything that should be tried before looking at a new pumping system? If not what could be done in new pumping system to eliminate this?





RE: Slurry Impeller Erosion
mog69
RE: Slurry Impeller Erosion
RE: Slurry Impeller Erosion
RE: Slurry Impeller Erosion
RE: Slurry Impeller Erosion
Dik
RE: Slurry Impeller Erosion
I have not seem a failed impeller yet (just started this job two weeks ago) I am told that the blades erode away until the pump is unable to develop the head needed and looses prime. Supposedly there is very little pitting so we do not suspect cavitation as the leading cause of failure.
RE: Slurry Impeller Erosion
RE: Slurry Impeller Erosion
http://www.practicalpumping.com/articles.php
I have seen to many damage on pumps to enter the debate of abrassion x erosion x cavitation
Lately I had an impeller of cooling water pump completely destroyed. After we opened it we wondered how we didn't catch it with the flowmeters or pressure indicators. Theoretically sound piping practices, pump below the cooling tower basin, amperage was climbing, vibration increasing.
Then we found a 2 inch hole on the suction just below a chemical injection quill...
RE: Slurry Impeller Erosion
Nick
"Speed costs money boys, how fast do you want to go?"
RE: Slurry Impeller Erosion
RE: Slurry Impeller Erosion
RE: Slurry Impeller Erosion
RE: Slurry Impeller Erosion
www.giwindustries.com
Timing has an awful lot to do with the outcome of a rain dance.