Falling film evaporator

Multi effect falling film evaporator is the feed liquid self falling film evaporator heating chamber on the tube box added, the liquid distribution and film forming apparatus, evenly distributed to each heat transfer tube, and along the inner wall of the heat exchanging pipe a homogeneous membrane flow. In flow process, is in the shell side of the heat medium is heated and vaporized, produce steam and liquid phase into the separation chamber of evaporator, vapor liquid after full separation, steam enters into the condenser (single effect operation) or to enter the next effect evaporator as the heating medium, so as to realize the multi effect operation, while the liquid phase by the separation chamber discharge. Heat pump evaporation priciple: secondary steam generated steam from the steam jet suction pump will produce evaporator and compression, and the secondary steam generated steam mixes (or mechanical vapor compression secondary compressor), so that the low-grade high-grade heat into steam used again, so that generated steam consumption is gteatly reduced, such as single-effect evaporation heat steam consumption can reach double or even triple effect of efficiency levels. Pump evaporation especially for heat sensitive materials, ebullioscopic small value materials and to provide high pressure steam applications. Ejectors little change can also be used superheated steam into saturated steam device.

Performance characteristics

(A) The operation is simple and convenient

1. The falling film evaporator starting, stopping, simple and quick operation can be automatic controlled.
   

2. Standed within the evaporator materials is very small, short running time, after stopping, it can be quickly emptied within the evaporator.

3. With the excellent performance of the liquid distribution device, adaptable to flow changes.

4. Through sight glass and liquid level gauge can be easily observed evaporation, and can be easily adjusted.

(B) Suitable for heat sensitive materials evaporation

  1. Material only through a heat exchange tube can be heated to steam and requirements, the material being short heating time, the multi-effect falling film evaporator can guarantee the quality of thermal sensitive material.

  2.Under vacuum operation, the evaporator can reliably ensure the quality of the thermal sensitive material.

(C) The applicability is strong

  1. Suitable for crystallization operating in the vast majority of the medium evaporation operation and low viscosity of the medium.

  2. Through easily adjust evaporation temperature can meet the requirement of different medium on the evaporation temperature.

(D) Low energy consumption, easy to achieve multi-effect operation

Falling film evaporation temperature losses small, not elevated hydrostatic pressure caused by the bliling point and in small temperature difference can still ensure a higher heat transfer coefficient (5 to 7 DEG C temeprature can be normal and efficient operation), so in certain conditions, the total temperature difference is easy to implement multi effect operation, so as the achieve the purpose of reducing steam consumption.