The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 1984
Filed:
Jun. 09, 1980
William J Darm, Tigard, OR (US);
United Air Specialists, Inc., Cincinnati, OH (US);
Abstract
A gas condenser apparatus and method is described employing two heat exchanger stages for condensing water vapor and other contaminates, 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 passages 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 the solvents are removed by condensing them in the second 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 steps 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.degree. F.