Patent ID: 6793770
Filing Date: 2004-09-21
Classification: B01D,C13B,Y10S

Abstract:
An evaporator comprising:at least a first heat exchanger and a second heat exchanger for top loading of a medium to be concentrated; means for heating each of said heat exchangers heat in cross stream by vapors having different compositions and different pressures; means for separately discharging said medium concentrated and exhaust vapors generated after escaping from said heat exchangers; a medium distributor common for all of said heat exchangers for feeding said medium to be concentrated; means for feeding the medium escaping from said first heat exchanger directly to the second heat exchanger; means for discharging the medium from the second heat exchanger thereby separating said medium from said exhaust vapors; a first common dividing wall for separating a space for said exhaust vapors from steam spaces of the heat exchangers; and a second dividing wall between said heat exchangers separating said steam spaces and/or turning chambers of the heat exchangers from each other.