MVR Evaporator Multi-effect evaporator Single-Effect Evaporator Double-Effect Evaporator Triple-Effect Evaporator Four-Effect Evaporator Forced-Circulation Evaporator Falling Film Evaporator Zero Wastewater Discharge System Mother Liquor Dehydration Heat Exchanger Crystallizer Mixed Salt Separation And Purification Equipment Evaporation Crystallization Evaporation Concentration High COD and high salt wastewater