Falling Film Evaporator

Product Description

Features :

• Excellent heat transfer coefficients.
• Low temperature operation
• Optimum heat transfer area
• Self cleaning action from salting
• Scaling and fouling

 Specifications

• Preheating of liquid is done to the boiling temperature for concentrating it. In the heating tube, tiny films enter through a distributor connected at the top of evaporator. Then it moves downwards at the boiling temperature that causes it to evaporate partially.
• Falling Film Evaporator works on the principle of liquid-spreading into every tube, hence creating a tiny film all over the tube's area
• Ideal for formulating liquors whose specific heat transfer rate is high
• Also suitable for fluids with low viscosity, less fouling and also for non crystalline solutions.
• Its process is controlled via convection and / or conduction through the film  that are two processes for heat transfer

Key Benefits:

• Effects of thermal degradation can be easily minimized using short product contact time
• Because of the heat flux and low temperature of tube wall, fouling can be reduced
• Renders highly efficient performance to allow designs with multiple effects
• Ideal choice for the areas that use heat sensitive products

Working

• Top of the exchanger is the place from where the liquid enters that needs to be boiled
• Tubes need to be equally wet and this is ensured by the internal distributor
• A film of liquid is placed along the tube sides for avoiding the tubes from flooding
• While the liquid is passed through the tubes, it is boiled
• Vapor is collected at the bottom of exchanger while the liquid is flushed out
• In most of the cases, this collected vapor find usage for heating the evaporator

Applications :

• Caustic Soda
• Corn Steep-water
• Fruit Juices
• Pectin Solutions
• Pharmaceuticals
• Sorbitol
• Sucrose