针对碎煤加压气化高盐废水开展分盐结晶工艺中试研究，产出的氯化钠和硫酸钠结晶盐品质分别达到GB/T 5462—2015精制工业干盐二级品标准和GB/T 6009—2014Ⅱ类合格品标准，表明分盐结晶技术上可行。电驱动膜实现对高盐废水的深度浓缩减量，浓缩倍数达到6倍以上，大大降低分盐结晶单元的处理量和投资。仅考虑药剂和公用工程消耗，高盐废水分盐结晶处理吨水运行成本34.5元。

A pilot study is carried out on pure salt recovery crystallization of high salinity wastewater from pressurized gasification of crushed coal.The qualities of produced sodium chloride and sodium sulfate reach GB/T 5462-2015 dry salt secondary standard and GB/T 6009-2014Ⅱ class qualification standard,respectively,indicating that this pure salt recovery crystallization process is feasible.The significant concentration and volume reduction of high salinity wastewater can be realized by electrically-driven membrane technology,and the wastewater can be concentrated by more than 6 times,which can greatly reduce the treatment scale and investment of the evaporation and crystallization unit.If the consumption of chemical agents and utility is calculated only,the operating cost of the whole treatment process in pilot scale is RMB 34.5 per ton of high salinity wastewater.

乔英存(1978-),男,硕士,工程师,从事质量健康安全环保管理工作,qiaoyc2@cnooc.com.cn