F - Mech Eng,Light,Heat,Weapons – 28 – B
Patent
F - Mech Eng,Light,Heat,Weapons
28
B
122/137
F28B 1/06 (2006.01) B01D 5/00 (2006.01) B01D 53/26 (2006.01) F28D 9/00 (2006.01)
Patent
CA 1132867
TWO-STAGE GAS CONDENSER WITH FEEDBACK COOLING Abstract A gas condenser apparatus is described employing two heat exchanger stages for condensing water vapor and other containments, such as organic solvents, out of hot air or other treated gas by means of a cooling gas which is provided by feeding back the treated gas through the cooling passage of such heat exchanger stages after removal of the water and solvents. The heat exchangers are of the counterflow type so That the treated gas and the cooling gas flow in opposite directions therethrough. Preferably, water vapor is removed from the treated gas by condensing it in the first stage and stage thereby separating the condensed water and solvents. Auxiliary cooling coils are provided at the input of the first stage and at the output of the second stage for further cooling of the treated gas. A temperature sensor at the output of the first stage controls the input cooling coil in order to maintain the temperature of the treated gas at the output of the first stage above the freezing temperature of water. The treated gas is used as cooling gas and is fed back first through the output heat exchanger stage and then through the input stage in a sequence opposite to that of the flow of the treated gas. This results in a very efficient operation in which the temperature difference between the treated gas input and the cooling gas output is small, typically only about 20°F.
335068
Allied Air Products Co.
Smart & Biggar
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