Vapor (or vapour) recovery is the
process of
recovering the
vapors of
gasoline or other
fuels, so that they do not escape into the
atmosphere. This is often done (or required by
law) at
filling stations, in order to reduce
noxious and potentially
explosive fumes and
pollution. The negative
pressure created in the (underground)
tank by the withdrawal is usually used to pull in the vapors. They are drawn-in through holes in the side of the
nozzle and travel through special
hoses which have a return path.Vapor recovery is also used in the chemical process industry to remove and recover vapors from storage tanks. The vapors are usually either environmentally hazardous, or valuable to be recovered. The process consists of a closed venting system from the storage tank ullage space to a vapor recovery unit (VRU) which will recover the vapors for return to the process or destroy them, usually by oxidation.
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Mechanical systems that collect and recover chemical vapors resulting from transfer of gasoline from operations such as tank-to-truck systems at refineries, tanker-to-pipeline systems at offshore oil operations, and pump-to-vehicle systems at gasoline stations. For more information, click here.
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