为实现高浓盐水杂盐纯化和结晶盐分离技术应用示范，验证工艺稳定性、经济可行性，以内蒙古某煤制天然气碎煤加压气化废水为对象，开展了生化、回用、浓盐分离和结晶技术应用全流程示范中试研究。介绍了中试装置生化单元的设计参数、运行情况和出水水质。试验表明，在生化进水COD_Cr含量在3 000~4 500 mg/L、氨氮含量在200~300 mg/L、总酚含量在600~750 mg/L的情况下，生化单元出水各项指标优于所在煤制气工厂同期指标，并满足下游中水回用、膜浓缩和结晶盐分离结晶的要求。

The purpose of the pilot test is to realize the demonstration task for impurity salt purification and crystalline salt separation from high concentration wastewater,to verify the stability and economic feasibility of the process.Taking the high concentration phenolic ammonia wastewater from a coal-to-natural gas crushing plant in Inner Mongolia as the research object,the pilot scale study on the whole process demonstration of biochemical,reuse,concentrated salt separation and crystallization technology is carried out.The design parameters,operation status and effluent quality of biochemical unit in the pilot plant are introduced.It is shown by pilot result that various indexes of the effluent from the biochemical unit are better than that in the plant in the same time when the contents of COD_Cr,ammonical nitrogen and total phenols in wastewater at input of the biochemical unit is 3 000-4 500 mg·L^-1,200-300 mg·L^-1 and 600-750 mg·L^-1,respectively.It meets the requirements of downstream reclaimed water reuse,membrane concentration and crystallization of crystalline salt separation.

张文博(1985-),男,硕士,工程师,研究方向为煤化工项目管理,0352-3896147,zhangwb19@cnooc.com.cn