Falling Film Evaporator Dealers in Perundurai, Erode

• Color: Blue
• Condition: New
• Automatic Grade: Fully Automatic
• Application: Industrial

Falling Film Evaporators, water is boiled in a sequence of vessels, each held at a lower pressure than the last. Because the boiling point of water decreases as pressure decreases, The vapour boiled off in one vessel can be used to heat the next, and only the first vessel (at the highest pressure) requires an external source of heat. This is called multiple effect and no of stages / effects is depend on quantity of vessel / calandria in sequence.Theoretically, one kg of steam evaporates one kg of water. In multiple effect evaporator, one kg of steam evaporates up to 6 kg of water by no of effects and vapour recirculation by thermo vapour recompressor. It is called as steam economy 1:6. Feed is preheated to nearby boiling temperature in Pre heater that connected with all calandria. All calandria are operated at stage by stage vacuum with reduced temperature. So feed is preheated by stage wise from lower temperature to higher. Then it is passed via first calandria tube bundles as fine film layer over the tube surface area. In shell side fresh Steam is given via Thermo Vapour Compressor. Feed is heated and evaporated in calandria. Evaporated Vapour is separated in Vapour Separator, vapour is sent to second calandria Shell side. Un evaporated feed is transferred to second calandria tube side.Here further evaporation is done. So each calandria evaporates feed and concentrate coming out from last calandria. In this system, concentration is achieved by stage by stage and each calandria have higher concentration as stage increases. A part of evaporated vapour is recycled to first calandria via thermo vapour recompressor. In Thermo Vapour Compressor, Fresh Steam with pressure is passed via steam nozzle. Steam produce high velocity and produce a venturi Effect.This will recirculation a part of evaporated vapour.