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Wärtsilä Hamworthy Hydrocarbon Blanketing System

Our system eliminates the environmental damage and economic loss caused by emissions of gas vented to the atmosphere in a conventional process

The Wärtsilä Hamworthy system utilises hydrocarbon gas as a blanket gas in the cargo tanks, and recovers the off gas. Its primary application is in FPSOs. The blanket gas prevents the intrusion of oxygen into the cargo tank atmosphere, thus creating a closed system.

During loading, surplus gas from the cargo is recovered and recycled into the process plant by means of a blower/ejector/compressor. All the hydrocarbons are recovered to the process, and emissions into the atmosphere are eliminated during normal operation. When offloading, the hydrocarbon blanket gas is supplied to maintain pressure in the cargo tanks.