Product Display
The falling film evaporator is an efficient one-way non circulating membrane evaporation equipment, which has the characteristics of high heat transfer efficiency, large heat transfer coefficient, small temperature difference loss, short material heating time, not easy to deteriorate, easy multi effect operation, low energy consumption, and small equipment volume.
The falling film evaporator is a process in which the feed liquid is added from the upper tube box of the evaporator and evenly distributed into various heat exchange tubes through the liquid distribution and film formation device. Under the combined action of gravity, vacuum induction, and airflow, the liquid flows in a uniform film shape from top to bottom. During the flow process, it is heated by the shell side heating medium, and the liquid vaporizes. The generated steam and liquid enter the separation chamber of the evaporator together, and the steam and liquid are fully separated. The steam enters the next effect evaporator as the heating medium, thus achieving multi effect falling film operation.
working principle
The falling film evaporator is an efficient one-way non circulating membrane evaporation equipment. The multi effect falling film evaporator enters the material liquid from the top of the heating chamber of the falling film evaporator through a tube box, and is evenly distributed into each heat exchange tube through a liquid distributor and film distribution device. It flows down in a uniform film shape on the inner wall of the heat exchange tube. In the process of membrane flow, the heated medium in the shell side vaporizes, and the generated steam and liquid phase enter the separation chamber of the evaporator together. In the separation chamber, the steam and liquid are fully separated, and the secondary steam enters the shell side of the next effect evaporator as the heating source for the next effect (or enters the condenser for condensation). The liquid phase is discharged from the separation chamber into the next effect until it reaches the concentration and then discharged, thus achieving multi effect falling film evaporation operation.
Performance characteristics
（1） Easy and convenient operation
1. Driving and parking are easy and fast to operate. It can be conveniently observed through a sight glass or liquid level for evaporation, and can be easily adjusted.
2. The residual material in the evaporator is very small, and the driving time is short. After parking, the material in the evaporator can be quickly emptied.
3. The multi effect falling film evaporator has strong adaptability to flow changes and can operate efficiently over a wide range of flow rates.
（2） Suitable for evaporation of thermosensitive materials
1. The material can be heated and evaporated only once through the heat exchange tube, and the heating time of the material is short. The falling film evaporator can ensure the excellent quality of heat sensitive materials.
2. Under vacuum operation, the evaporator can more reliably ensure the quality of thermosensitive materials.
（3） Strong applicability
1. Suitable for evaporation operations in the vast majority of media and crystallization operations in low viscosity media.
2. By conveniently adjusting the evaporation temperature, the requirements of different media for evaporation temperature can be met.
（4） Low energy consumption, easy to achieve multi effect operation
The temperature difference loss of falling film evaporation is small, without the boiling point increase caused by liquid static pressure, and can still ensure a high heat transfer coefficient under small temperature differences. It can operate normally and efficiently even under very small temperature differences, making it easy to achieve multi effect operation and achieve the goal of reducing steam consumption.
Adapt to materials
High heat transfer efficiency, large heat transfer coefficient, small temperature difference loss, short material heating time, not easy to deteriorate, easy to operate with multiple effects, low energy consumption, and small equipment volume.
Specially used for heat sensitive materials and low concentration materials that are not easily crystallized.
technical specifications
Single effect falling film evaporator;
Double effect falling film evaporator;
Triple effect falling film evaporator;
Four effect falling film evaporator;
Five effect falling film evaporator;
At the same time, steam jet heat pump, mechanical heat pump (MVR), etc. can be selected;
It can also be combined with other forms of evaporators.