The study of processes of work of industrial crystallizer for water purification by freezing

The work deals with the separation process of freezing water purification. Experimental research on the freezing water separation in the mold of the capacitive type has been carried out. The tempera-ture of the heat transfer surface was installed in the following values: -2, -5, -7 and -10° C. using the water from the water supply system of the city of Kemerovo as a source of water. The effect of tem-perature and the duration of the process, the thick-ness of the ice layer and the amount of crystallized water in the process of separating freezing were established. The rate of change of the ice thickness on the crystallization time was calculated. It was found out that throughout the freezing process ice formation speed was nonlinear. The greatest value of this parameter was observed during the first 15 minutes and crystallization was from 5 to 20 mm per hour. During the specified time the ice massif with the wall thickness of 1 mm to 5 mm depending on the coolant temperature was formed. After 180 minutes of ice formation process the speed dropped to 2-5 mm / h. Based on the required characteristics of the process the cooling capacity, amounting to 61.35 kW has been calculated. The parameters of freezing for the chiller plant capacity of 0.5 t / h - the temperature of the heat transfer surface of -10° C, the duration of the crystallization was 1 hour.