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The scaling control measures of water ring vacuum pump are as follows:

1. Using softened water as sealing fluid of water ring vacuum pump

Using boiler softened water as vacuum pump sealing fluid can effectively prevent the vacuum pump from scaling, but increase the production cost.

2. Adding scale inhibitor in natural water as sealing fluid of water ring vacuum pump

When natural water is used as sealing fluid of vacuum pump, adding scale inhibitor can also effectively prevent vacuum pump from scaling. However, the price of scale inhibitor is expensive, and equipment such as water tank and water supply pump should be added to increase the production cost.

3. Using condensed water of evaporation sewage as sealing fluid of water ring vacuum pump

In general, the spray water of causticization vacuum slag washer and pre hanging slag washer uses evaporated sewage condensate water as the sealing fluid of water ring vacuum pump. The temperature of sewage condensate is about 60 ℃. After practical operation, the vacuum degree of 2bea-153-0 water ring vacuum pump is maintained at 0.04MPa, The vacuum degree of 2bea-303a-0 water ring vacuum pump was kept at 0.07MPa, which did not affect the vacuum degree.

In a word, using the condensed water of evaporation sewage as the sealing fluid of causticization water ring vacuum pump has ideal application effect and stable performance, which can completely meet the process requirements of vacuum slag washer and pre hanging slag washer, and solve the problem of scaling easily in alkali recovery causticization water ring vacuum pump.