Patent ID: 6155077
Filing Date: 2000-12-05
Classification: B01D,B63J

Abstract:
A method for condensation of a gas with several fractions, wherein the gas is supplied to a first passage of a first heat exchanger where the gas is cooled by a refrigerated coolant which is supplied to a second passage of the first heat exchanger from a cooling plant with a refrigerating machine, whereupon condensed and non-condensed gas fractions are supplied separately from the first heat exchanger, the condensed fractions being supplied to a collecting container, the method including the steps ofsupplying gas to a first passage of a second heat exchanger and the non-condensed fraction from the first heat exchanger to a second passage of the second heat exchanger;removing non-condensed gas fractions from the second heat exchanger, whereby gas fractions in the first passage with a condensation temperature which is higher than a temperature of the supplied, non-condensed fractions from the first heat exchanger are condensed in the first passage of the second heat exchanger and similarly supplied therefrom to the first collecting container;measuring the temperature of the non-condensed gas fractions which are removed from the second passage of the second heat exchanger; andpermitting gas to flow into the first passage of the second heat exchanger only if the temperature from measuring is less than the condensation temperature of some of the fractions in the gas.