Cavitation problem in water ring vacuum pumps
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Our company’s water ring vacuum pumps have suffered damage on multiple occasions; upon disassembly, it was found that the blades had pitting, which suggests cavitation as the cause. However, there is no effective solution at present. I. Current situation: The water ring vacuum pumps are used to draw in high-temperature gases from the double-effect concentrator, and these gases have a high temperature. The current water ring vacuum pump is equipped with a small cooling tower, and the water temperature is often 40–50°C. II. Measures already taken: 1. Adding more cooling towers, but with poor results; 2. Installing heat exchangers on the intake pipes at the source to cool the air temperature, but this also yielded limited results. III. Problem: How to reduce the temperature?
It’s best to get a picture to take a look at. Is the medium corrosive at the moment?
A gas ejector or steam ejector is installed in front of the liquid ring pump to raise the inlet pressure of the pump to a reasonable level.
Cavitation is not necessarily temperature. There are many causes of cavitation. If you only want to lower the temperature, that’s another direction
The cooling water pipes are too thin, resulting in insufficient water supply.
Because the higher the vacuum level, the lower the boiling point; when a liquid boils, numerous bubbles are formed. These tiny bubbles break easily, and during this process they exert strong forces on the impeller. Over time, the impeller may develop holes, and the damage can become so severe that it cannot be repaired, forcing the need for replacement； Excessively high flow rates of the working fluid can also generate sharp noises, so the flow rate needs to be reduced. For the cavitation issue, considering using 304 or 316L material is an option
For cavitation damage, imported high-polymer ceramic metals can be used for repair, followed by protection with a cavitation-resistant ceramic coating. What is the specific steam temperature?
If it doesn’t work, just replace the pump; there are also various dry vacuum pumps available for you to choose from