Patent ID: 7043912
Filing Date: 2006-05-16
Classification: F01K,F01N,F02B,F22B,F23G,F28D,F28F,Y02E,Y02P,Y02T

Abstract:
1. A method for preventing acid dewpoint corrosion in a waste heat recovery system having at least one waste heat source adapted to discharge hot gases from an exhaust port to a heat exchanger for purposes of waste heat recovery, comprising the steps of: providing a venturi to fluidly interconnect said exhaust port to a manifold for reducing the pressure of the gases in the manifold to a level below ambient pressure; providing a fan downstream of the heat exchanger for drawing the hot gases from the manifold, through the heat exchanger and then to the fan to be discharged to ambient; and providing a check valve which is fluidly interconnected to a downstream end of said venturi to allow hot gases to be discharged from said venturi to ambient during periods in which the fan is not operating but not allow ambient air to enter said venturi when the fan is operating.