(under subclass 110) Apparatus including means for establishing a liquid layer, which layer flows by gravity along a surface confining it or drops from one surface to another, said surface of a separate temperature modifying means closely adjacent thereto serving to heat or cool the liquid.
SEE OR SEARCH CLASS
122, Liquid Heaters and Vaporizers,
39, for a closed liquid vaporizer of the film type.
159, Concentrating Evaporators,
13+, for a concentrating evaporator of the moving film type.
261, Gas and Liquid Contact Apparatus, 153, for a gas liquid contact device having a gas exposed liquid body or sheet contacting a heat exchanger and having means promoting the contact of gas with the liquid.
