Plate type heat exchanger for exhaust gas heat recovery

F - Mech Eng,Light,Heat,Weapons – 22 – B

Patent

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Details

F22B 31/08 (2006.01) F24D 12/02 (2006.01) F28D 9/00 (2006.01) F28D 21/00 (2006.01) F28F 3/04 (2006.01) F28F 3/08 (2006.01)

Patent

CA 2350299

An exhaust gas heat recuperation system for use with a boiler is disclosed. The heat recuperation system includes a plate-type heat exchanger for exhaust gas heat recovery for exchanging heat between an exhaust gas and a charge gas. The heat exchanger preferably includes a series of exhaust gas plates stacked alternately with, and parallel to, a series of charge gas plates. Each of the exhaust gas plates and charge gas plates have raised contained ridges to form a substantially sinusoidal path for directing the respective gas therealong. The shape of the path reduces exhaust gas particulate deposition. The charge gas flows in a countercurrent to the exhaust gas to facilitate maximum heat transfer. The heat exchange is particularly useful in laminar flow conditions. In one embodiment, the heat exchanger is connected to exhaust gas inlet and outlet conduits, change gas inlet and outlet conduits, and a condensate collection changer as part of an exhaust gas heat recuperation system, for use particularly in steam or hot water boiler applications. The heat exchanger can be used as a retrofit to existing boilers or integrated into a single unit as part of a new boiler construction.

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