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Investigation of forced circulation crystallizer performance as major unit in factories of production of NaCl

Farshad Farahbod, Alison Zamanpour, Ghasem Shahriari

This work represents the performance of a forced circulation crystallizer (FCC) equipped with a condenser as main stage of in many industrial processes. The purpose of this paper is gathering fresh water and also liquor from brackish water. So a blender is constructed before crystallizer to concentrate the saline water to about 30 wt% as a suited feed for a FCC. The effect of cooling water flow rate of FCC on quality of effluent liquor from FCC is studied in this paper. The evaporation rate from FCC is obtained 0.085 kg/min at 85.8 C boiling temperature of liquor.At this temperature the highest amount of white crystal is produced. Experiments show the produced crystal is in size range of (675- 795m).Minimumamount of energy consumption by heat exchanger is 6.4 kW. h. which is obtained at 6.3 kg of the product.Also, experimental results show the relation between the cooling water flow rates, amount of feed, vaporization rate, distilled water and pH as graphs.