Abstract: Using the catalytic wastewater of a petro-chemical refinery as a research object,a pilot study has been impl-emented. The pretreatment+membrane concentration+evaporation crystallization process,combined with nanofiltration separation and crystallization process has been used,in order to achieve the goal of zero discharge of catalyst wastewater and salt separation. As a result,the sodium chloride and sodium sulfate are effectively recovered from wastewa-ter,reaching the industrial salt standard,respectively. The feasibility of zero discharge of circular economy is verified.

Key words: catalyst wastewater, nanofiltration separation, fractional crystallization, zero liquid discharge

摘要： 以某石化厂催化废水为研究对象进行中试研究，采用预处理+膜浓缩+蒸发结晶工艺，同时结合纳滤分离及分质结晶工艺，实现催化废水的零排放及分盐目标，有效回收废水中的氯化钠及硫酸钠，并分别达到《工业盐》的标准，验证零排放循环经济的可行性。

关键词: 催化废水, 纳滤分离, 分质结晶, 零排放

CLC Number: 

• X703