The advantages of multi effect evaporators: 1. Energy saving: Multi effect evaporators can connect multiple evaporators in series, achieving cascading energy utilization and greatly reducing energy consumption. 2. High efficiency: The multiple evaporators of the multi effect evaporator can work continuously, improving production efficiency. 3. Environmental protection: Multi effect evaporators can separate harmful substances from wastewater, achieving purification and treatment of wastewater, which is beneficial for environmental protection.