The sulfur ammonium crystal pump cannot achieve proper flow rate
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The mother liquor temperature is 60 degrees, the acidity is 4.0, and the amount of material fed into the crystallization pump is not sufficient
First, check whether there are any scabs or blockages in the pump’s suction pipe. Second, the temperature of the mother liquor is a bit too high; lower it to 50-55 degrees to see if there is any improvement
The mother liquor temperature is 60 degrees; what is the temperature of the gas after preheating in your case? In my opinion, it’s better to keep the mother liquor temperature below 60 degrees. Additionally, there are factors such as the inlet and outlet temperatures of the crystallization pump, as well as the crystal-to-solvent ratio.