A project example of thermal salt separation crystallization process treating coal chemical industrial wastewater
Aiming at the high salt and high COD containing wastewater produced by the upstream re-claimed water reuse device of a coal chemical enterprise,thermal salt separation crystallization process was adopted to realize the purpose of zero discharge of wastewater and resource utilization of crystalline salt.The flow and design parameters of the said process were introduced;besides,the treatment effect and operation cost were pointed out.The actual operation results showed that,the produced water fully met the requirement of reuse,the average purity of sodium sulfate crystal salt and sodium chloride crystal salt reached 99.09%and 98.52%re-spectively.The continuous and stable operation of the said device indicated that,thermal salt separation technol-ogy had been successfully applied in the field of coal chemical industrial wastewater treatment.
coal chemical industrial wastewaterfreezing crystallizationreverse osmosisthermal salt sepa-ration crystallizationzero discharge
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