Multi-effect Falling Film Evaporator

Film Evaporator

Multi-effect counter-current, co-current, and film evaporator series equipment are designed for the concentration of corn syrup, fermentation juice, fruit juice, beverage, milk, wine lees filtrate, fermentation broth, and high-concentration organic or chemical wastewater. They offer energy-saving, short heating time, suitable for the evaporation and concentration of high-viscosity materials, and a high concentration ratio. Additionally, they can produce high-quality deionized water to meet the needs of industrial boiler water. They can be combined into double-effect, triple-effect, quadruple-effect, and quintuple-effect evaporation systems. They can also utilize waste steam from the top of tube bundle or disk dryers, as well as other low-heat-value heat sources.(As condensate steam) serves as the heat source for the evaporator, it becomes a waste heat evaporator, thereby significantly reducing the consumption of steam and achieving substantial energy savings. When there is an ample supply of waste heat steam, it is possible to completely eliminate the use of raw steam, resulting in significant economic benefits.

Working Principle
Materials are evenly distributed into each evaporator tube by the distributor, forming a spiral-shaped film that flows from top to bottom under the action of gravity and secondary steam generated by self-evaporation. Simultaneously, heat exchange occurs between the thin film of materials and the outer wall steam of the tube bundle, causing water content in the material to heat and evaporate. The stable temperature difference and heat transfer area result in a consistent water evaporation rate. The secondary steam formed by the evaporated water is utilized multiple times, maximizing heat energy utilization, reducing steam consumption, and forming the design principle of multiple evaporation.

Performance Features:
This evaporator distribution disk is spiral-shaped, featuring particularly even material distribution, with the liquid flowing down in a film-like manner along the inner wall of the tubes, suitable for sugar concentration.
The evaporator top cover is flat, making it easy to clean and maintain.
If the production volume does not require a large evaporation capacity, the heat exchange area can be adjusted.
The vacuum system can be selected by the user, either a water ring vacuum pump or a water jet pump is available.
Condensate can be recycled.
At an evaporation rate of 3,900 kg/h, the steam consumption is 1,300 kg/h.
Low heat dissipation, especially for secondary steam.
Easy to operate, with a small land occupation.