Purification and Resource Utilization of Industrial Mixed Salt Wastewater by Nanofiltration Membrane
Taking the"zero discharge"project of wastewater produced in the chemical park of Shaanxi Yanchang middling coal Yulin Energy and Chemical Co.Ltd as an example,the application of nanofiltration(NF)membrane in the purification of industrial wastewater was studied.Through the separation of NaCl/Na2SO4 in high concentration wastewater by NF,the produced water by NF entered the six effect falling film evaporation unit for crystal refining of industrial salt,the product sodium chloride mass fraction was≥92%,the resource utilization rate can reach more than 43%,and the economic benefit is 36.225 million yuan/a.
NFmixed salt separation,TDShigh-concentration wastewater
NETL
NSTL
万方数据
维普
