
Thin-layer evaporators are described in which evaporation cylinders and a cylindrical vapor-collection vessel of the same height are mounted to expand in parallel between horizontal base and top plates joined by a vertical jacket surrounding the cylinders and vessel and confining together with the plates a steam jacket. Rotors in the cylinders apply thin layers of the substance to be dried to the inner surfaces of the cylinders, from the tops of which vapors are discharged to the top of the vess...











