Membrane distillation-crystallization coupled technology is efficient,economical,environment-friendly.It can recycle fresh water while separate inorganic salt crystals from brine.Polytetrafluoroethylene(PTFE) flat-sheet membranes were used to separate water and inorganic salt crystals from magnesium chloride(MgCl_2) solution via direct contact membrane distillation-crystallization(DCMDC) and vacuum membrane distillation-crystallization(VMDC).The effect of the inlet temperature of feed,circulation rate,feed ...