Dryer - ATFE / ATFD | ATFE Manufacture in India | FFE / RFE

The Agitated Thin film evaporator (ATFE) consists of two major assemblies – jacketed shell and a rotor assembly which rotates at high speed inside the shell. The feed enters evaporator at top, tangential to shell and gets distributed along the shell by the distributor. The rotor blades spread the feed evenly on the heated surface into a thin film and further agitate the film. Heating medium passing through the jacket evaporates the volatile component in feed. The vapor generated flow counter currently to feed and gets cleared in entrainment separator before leaving through vapor nozzle. The concentrate product comes out at bottom.Features

Residence time of few seconds, hence very useful for heat sensitive product.Single pass evaporation without re-circulation and or degradation.Scaling on heat transfer surface is avoided due to intense agitation of film. Good turn down capability.Low product hold up.Operating pressure upto 1 mbar(a)Different rotors can be used to suit application.Applications

Product concentration of heat sensitive products in bulk drugs, fine chemicals, agrochemicals and specialty chemicals.Re-refining of lubricating oil & transformer oil.Vacuum distillation of fatty acids, amines and esters.Concentration of oleo-resins & plant extracts. Stripping of monomers and silicon oils.Recovery of solvent and product from residue.Recovery of glycerin from residue.

Operating principle of short path distillation unit (SPDU) is similar to thin film evaporator except internal condenser. Here internal condenser is installed inside rotor cage assembly.

The feed enters the unit at top and get distributed into a thin film on the inside surface of shell. Heating medium passing through the jacket evaporates volatile component in feed. The vapor generated flow across the rotor and condense on internal condenser. This short path of vapor eliminate pressure drop. Hence evaporation can be done at high vacuum as 0.001 mbar(a). The distilled product and balance bottoms are taken out through separate outlets.

Features

Operation pressure as low as 0.001 mbar(a). Hence production can be distilled at lower temperatures to avoid degradation.With high vaccum and high heating temperature, very high boiling components can be distilled easily.Residence time a few seconds.Single mass evaporation.Good turn down capability.Low product hold up.Use of metal blades at high temperature gives more flexibility than conventional roller design.Applications

High vacuum distillation of bulk drugs, natural or synthetic vitamins, esters, 7 epoxy resins, fatty acids, glycerides, tocopherols.Re-refining of lubrication oil.Purification of natural and synthetic waxes.

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