Cavitation problem of hot water pump (centrifugal pump)!
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During the equipment maintenance process, it was found that the pitting corrosion on the impeller surface was severe. Is it caused by cavitation? How to deal with it? The medium of this pump is steam condensate, the temperature is 90°C, the inlet pressure is 0.02mpag, the outlet pressure is 0.62mpag, and the flow rate is 17m3/h. This post was last edited by §Feixiong§ at 2009-3-6 12:10 ]
There may be a problem with the selection of the overflow material. Also check whether there is cavitation.
Sir, I personally think that pitting corrosion is pitting corrosion, not cavitation corrosion. Pitting corrosion is the corrosion of the impeller by the chemical components in the medium. You need to consider the impeller material or the adjustment of the medium components.； Cavitation generally occurs in the form of scouring on the surface of the impeller, which is mainly caused by the increase in inlet temperature and vaporization at relatively low pressure, or by the pump inlet being evacuated for a short period of time, resulting in rapid vaporization, etc.
Thanks for the correction, brother! I'll fix the problem: If there is cavitation in the hot water pump, how to improve it and what specific measures should be taken!
If there is cavitation, you must first solve the problem of suction vacuum, and secondly solve the problem of your medium temperature (appropriate adjustments can be made)
The temperature of the medium is not very high. Does the medium contain substances that corrode the impeller? It is recommended that the impeller material be changed to 304, or analyze the substance and add an appropriate amount of water treatment agent to the water to neutralize it.
I want to take measures to reduce the vaporization pressure of the water, or increase the inlet pressure, and I am currently considering it!