Patent ID: 7582140
Filing Date: 2009-09-01
Classification: B01D,C12M,Y02E,Y02P

Abstract:
1. An inventive biogas fuel conditioning apparatus for removal of moisture and other unwanted constituents from a wet biogas stream in order to supply dry conditioned biogas fuel to a fuel consumer, said apparatus comprising: a blower, said receiving, pressurizing, and warming a wet biogas stream in order to provide a substantially constant-pressure biogas stream flow to the fuel consumer; a first heat exchanger receiving and cooling the wet pressurized warm biogas stream from said blower; a second heat exchanger receiving the cooled wet biogas stream from said first heat exchanger and further chilling the wet biogas stream to a predetermined temperature to condense substantially all moisture in the biogas stream; a first filter receiving the chilled biogas stream from said second heat exchanger and removing the condensed moisture to provide a dry biogas stream; said first heat exchanger then receiving and warming the dry biogas stream from said first filter by heat exchange with the incoming wet pressurized warm biogas stream; and a third heat exchanger further warming the dry biogas stream from said first heat exchanger; wherein said second heat exchanger is of the direct refrigerant-evaporating type.