Plate Evaporator S600

Structural composition 

The plate evaporator is mainly composed of the following components:

Corrugated plates: Usually made of stainless steel (304, 316L), titanium or nickel-based alloys, the surface corrugated design enhances turbulence and improves heat transfer efficiency.

Sealing gasket: Located between the plates, it prevents the leakage of the medium. Common materials include NBR (Nitrile rubber), EPDM (ethylene propylene Diene Monomer rubber), fluorine rubber, etc.

Compression frame: It includes fixed end plates, movable compression plates, upper/lower guide rods and compression bolts, which are used to fix the plates and maintain a seal.

Interfaces and pipes: Used for the inlet and outlet of feed, steam, condensate water and secondary steam.

Working principle

Plate evaporators usually adopt falling film evaporation or rising film evaporation methods:

Falling film evaporation: The feed liquid enters from the top, forms a liquid film along the surface of the plate and flows downward, while being heated and evaporated simultaneously.

Rising film evaporation: The feed liquid enters from the bottom, boils upon heating, and forms a vapor-liquid mixture that flows upward, achieving evaporation and concentration.

Heat exchange process:

Heating side: Steam (or hot water) flows on one side of the plate, releasing heat.

Evaporation side: The material liquid is heated and evaporated on the other side, and the secondary steam generated can enter the subsequent evaporation process or be condensed and recovered.

Limitations:

It is not suitable for materials with high viscosity (>500cp) or containing solid particles.

The sealing gasket may age after long-term use and needs to be replaced regularly.