Selection of alkali wash pump level gauge
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The wastewater from the production area is sent to a wastewater treatment facility for preliminary treatment; once its pH level meets the required standards, it is discharged into the main wastewater treatment plant. The wastewater treatment process is equipped with a system for eliminating unpleasant odors. The caustic washing pump associated with the caustic washing tower is installed above the tank connected to the bottom of the tower, and it operates automatically. When the liquid level in the tank is within the specified range, the float on the level gauge sends a signal to the computer, which triggers the automatic start of the caustic washing pump； The liquid level is too low; the float sinks, the caustic washing pump stops, and the make-up water valve opens. Our current level gauge isn’t working properly; the liquid level is so high that it overflows, and the float remains submerged in the water without rising. When I push it, it does rise. Do you have any recommended level gauges? P.S: The material of this level gauge is plastic now; it has been replaced once, but there has been no significant improvement.
Use a level gauge based on a different, more reliable principle, such as a hydrostatic level gauge
Okay, thank you! I’m going to find out more about static pressure level gauges.
The reason why the float cannot rise and fall smoothly with the liquid level is that there are bubbles in the alkali cleaning solution, as well as certain precipitates or deposits that tend to adhere to the float and its mechanical components, thereby hindering its upward and downward movement. By using hydrostatic or differential pressure level gauges that indicate changes in liquid level based on the pressure or pressure difference generated by the liquid level, it is possible to reduce the impact of precipitates or deposits in the alkali wash solution. However, it is also important to keep the liquid around such pressure sensors clean, and to prevent precipitates and deposits from affecting them; this can be achieved by installing additional automatic or timed flushing systems, or by choosing a location for the containers where there are no precipitates or deposits.
There is a type of level relay; you can purchase two of them – one to control the addition of water when the level is low and the shutdown of water supply, and the other to control the start and stop of the pump. It’s possible that one of them might be sufficient to meet your control requirements