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COMBINED EVAPORATIVE AND CONVECTIVE COOLER

IP.com Disclosure Number: IPCOM000019378D
Publication Date: 2003-Sep-12

Publishing Venue

The IP.com Prior Art Database

Abstract

The waste chiller unit and the top of the DCAC (Direct Contact After Cooler) in an air separation plant are integrated into a novel heat exchanger called a Combined Evaporative and Convective Cooler (CECC). The bottom section of the DCAC is replaced with a conventional aftercooler. In a CECC, which is a modified shell and tube type heat exchanger, incoming air cools by flowing inside the tubes in down flow, while a returning process waste stream and water flow in counter current directions on the shell side with the waste flowing upwards. Such process integration can lead to a more cost effective design. Also, the CECC eliminates a mode of failure of the DCAC by water overflow into downstream adsorption beds which can be disruptive and expensive to repair.