How to solve the cavitation phenomenon in slurry pumps?
It is an inherent property of liquids that boiling vaporization occurs when the pressure of the liquid drops below the saturation gas pressure at a given temperature. The saturation air pressure is constant at a given temperature and increases as the temperature rises.
For slurry pumps such as centrifugal pumps, reduce the pressure of the suction port is the key to make the liquid smoothly into the pump. When the suction port pressure is lower than the saturated air pressure corresponding to the water temperature, the suction liquid will be vaporized. The bubbles produced by vaporization will collect in the lower pressure area inside the slurry pump, i.e., the back of the vanes above the impeller inlet. With the flow of the surrounding liquid, these bubbles will produce noise and vibration due to the impact of the liquid, long-term so may lead to impeller spalling and damage.
Usually, the measures to solve the vapor corrosion phenomenon include:
1. Control the pressure of the suction liquid level to avoid the liquid level pressure is too low.
2. adjusting the flow rate of the suction port to ensure that the slurry pump operates at the specified flow rate.
3. appropriately reduce the installation height of the slurry pump.
4. Make sure the suction valve is fully open and clean the screen regularly.
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