Various hazardous waste treatment process schemes | ||
species | Treatment process | |
Waste emulsion | Oil separation + demulsification + heterogeneous catalytic chlorination + evaporation crystallization | |
Acid-base waste liquid + laboratory wastewater | Neutralization precipitation+heterogeneous catalytic chlorination + evaporation crystallization | |
Heavy metal waste liquid (containing chromium, arsenic, mercury, etc.) | Chemical precipitation + activated carbon filtration + heterogeneous catalytic chlorination + evaporation crystallization | |
High concentration organic waste liquid | Distillation + Heterogeneous Catalytic Chlorination + Evaporative Crystallization |
Performance comparison between MVR evaporator and traditional evaporator | ||||
Evaporator category | Multi-effect evaporator | MVR evaporator | ||
Investment cost | Lower | higher | ||
Energy consumption comparison | Use steam heat source | Use electricity | ||
Higher operating costs | Operating cost is about 0.33-0.5 of three effects | |||
Need boiler (or purchased steam) | All secondary steam is recovered | |||
Energy consumption | 0.25-1.1 tons of steam is used to evaporate 1 ton of water | Operating cost is about 0.33-0.5 of three effects | ||
Area | Larger | smaller | ||
Raw water quality requirements | Lower | higher | ||
way to control | Fully automatic | |||
stability | Stable equipment operation | |||
Treatment effect | Uniform crystals meet emission standards | |||
Application field | Various industrial wastewater treatment, seawater desalination, juice concentration, and salt separation |