English 
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1. A multi-effect evaporator is a combination of multiple single-effect evaporators.Its characteristic is to use the waste steam generated by the pre-effect to heat the after-effect evaporator to reduce energy consumption.There are usually double-effect evaporators, triple-effect evaporators or even multi-effect evaporation systems.The more control points there are, the greater the influence; the smaller the temperature difference driving force under different influences.The system should be selected according to the working conditions;
2. Multi-effect evaporators can be divided into ordinary multi-effect falling film/rising film evaporation systems and forced circulation multi-effect evaporators.The forced circulation evaporator increases the flow rate of materials in the evaporation tube, improves the heat transfer effect, and increases the evaporation intensity;
3. In a multi-effect evaporation device, the steam generated by the first effect of fresh steam heating does not enter the condenser, but is reused as the heating medium of the second effect.This can effectively reduce new steam consumption by approximately 50%.Reusing this principle can further reduce steam consumption.
1. The heat transfer process of multi-effect evaporation is boiling and condensation heat exchange, and the heat transfer coefficient is high;
2. The discharging temperature can be set to high and low temperature to achieve different discharging temperatures required by different materials.Evaporation can be operated in parallel flow, cross flow or co-current flow:
3. The operation flexibility of multi-effect evaporation is large, and the load range is from 110% to 40%, and it can operate normally;
4. Multi-effect evaporation operates in a vacuum state and has a low operating temperature, which can avoid or delay corrosion and scaling of equipment:
5. Another benefit brought by the low-temperature operation of multi-effect evaporation is that the feed requirements for salty wastewater are greatly reduced, thereby simplifying the pretreatment process of salty wastewater.
1. A multi-effect evaporator is a combination of multiple single-effect evaporators.Its characteristic is to use the waste steam generated by the pre-effect to heat the after-effect evaporator to reduce energy consumption.There are usually double-effect evaporators, triple-effect evaporators or even multi-effect evaporation systems.The more control points there are, the greater the influence; the smaller the temperature difference driving force under different influences.The system should be selected according to the working conditions;
2. Multi-effect evaporators can be divided into ordinary multi-effect falling film/rising film evaporation systems and forced circulation multi-effect evaporators.The forced circulation evaporator increases the flow rate of materials in the evaporation tube, improves the heat transfer effect, and increases the evaporation intensity;
3. In a multi-effect evaporation device, the steam generated by the first effect of fresh steam heating does not enter the condenser, but is reused as the heating medium of the second effect.This can effectively reduce new steam consumption by approximately 50%.Reusing this principle can further reduce steam consumption.
1. The heat transfer process of multi-effect evaporation is boiling and condensation heat exchange, and the heat transfer coefficient is high;
2. The discharging temperature can be set to high and low temperature to achieve different discharging temperatures required by different materials.Evaporation can be operated in parallel flow, cross flow or co-current flow:
3. The operation flexibility of multi-effect evaporation is large, and the load range is from 110% to 40%, and it can operate normally;
4. Multi-effect evaporation operates in a vacuum state and has a low operating temperature, which can avoid or delay corrosion and scaling of equipment:
5. Another benefit brought by the low-temperature operation of multi-effect evaporation is that the feed requirements for salty wastewater are greatly reduced, thereby simplifying the pretreatment process of salty wastewater.
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