Patent ID: 7780766

Claim:
A device for removing vapor gas generated by an oil-containing material comprising: a column separator having a first end and a second end, wherein said vapor gas enters said column separator at said first end and said vapor gas exits said column separator at said second end, wherein said column separator has a cross-sectional shape defined by an inner surface of said column separator when viewed from the top that is circular; a pipe positioned concentric to said column separator, said pipe having a pipe diameter; and a perforated spiral baffle positioned within said column separator, said perforated spiral baffle having a central longitudinal bore for receiving said pipe, wherein at least a portion of said perforated spiral baffle and said column separator is packed with a packing material; wherein said central longitudinal bore has a diameter that is substantially equivalent to said pipe diameter so that said perforated spiral baffle extends from said pipe to said column separator inner surface.