针对焦化含硫污水利用传统技术难以实现有效净化处理的问题,开展了新型陶瓷膜焦化酸性水净化处理技术研究,通过测量某企业含硫污水中所含杂质的粒径分布来选择适宜孔径的陶瓷膜,采用单管陶瓷膜净化试验装置对焦化含硫污水进行一系列的净化处理试验,结果表明:焦化含硫污水中杂质的粒径均在0.5 μm以上,大部分集中在20~250 μm的范围,采用过滤精度为0.05 μm的陶瓷膜可满足过滤要求;过滤后污水的平均浊度降低99%以上,平均除油率为96%以上;采用专有的廉价清洗剂进行循环清洗后,陶瓷膜渗透率可恢复至0.3mL/(m2·h·Pa)左右,抗污染能力强.在某石化企业延迟焦化装置上进行了工业侧线验证试验,结果表明,平均脱油率在95%以上,焦粉等固体含量低于30 mg/L,浊度降低98%以上,装置运行稳定,定期清洗后陶瓷膜的渗透率恢复良好.%It is difficult to purify the sulfur-containing sewage of delayed coking unit using common technology.In response to this situation,a ceramic membrane with appropriate pore size was selected based on the particle size distribution of a refinery sulfur-containing sewage.A series of purification experimentations were done using single tube ceramic membrane.The filtration results show that the average size of the particle is above 0.5 μm and most of them are concentrated in the range of 20-250 μm. A ceramic membrane with filtering accuracy of 0.05 μm can meet the requirement,by which the average turbidity of sulfur-containing sewage from delayed coking is reduced by more than 99% after filtration and purification and the average oil removal rate is 96.51%,the permeability can be recovered to 0.3 mL/(m2·h·Pa)The industrial side line test shows that the average oil removal rate is more than 95%,solids content,such as coke powder,is less than 30 mg/L,and the turbidity reduced more than 98%.The purification device runs stably and the permeability recoveries well after regular cleaning.
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