GB252505A - Improvements in and relating to evaporating apparatus - Google Patents

Abstract

252,505. Blair, Campbell, & McLean, Ltd., and Phillips, J. R. April 4, 1925. Multiple-effect apparatus; separate heater and evaporator aparatus.-In a piled multiple-effect apparatus comprising a series of elements of the separate heater and evaporator type, the liquid passes from the heaters a, a<1>, a<2>, to the evaporating chambers c, c<1>, c<2>, through tubes f surmounted by deflectors g which are adjustable in height so as to vary the extent of the annular openings. The tubes f and the deflectors g may be corrugated. The lowest heater a is heated by steam supplied to its casing by a tube h and the other heaters by vapours evolved in the evaporating chambers below them. Liquid to be evaporated is supplied by a pipe i to the bottom header of the heater a and rises through the tubes b to the upper header from which it passes through the annular opening between the tube f and deflector g into the evaporating chamber c. The partially concentrated liquid is forced or drawn through a pipe k into the second heater d<1>. Concentrated liquid is withdrawn from the upper chamber c<2> by a pump n. Steam or vapour is drawn from the chamber c<2> by a pump to a condenser l.