What Is A Vapor Recovery Unit (VRU) And How Does It Work?

 

 


 

A vapor recovery unit (VRU) is designed or used to remove undesirable vapors present in crude oil, well production wastewater, or other fuels stored in tanks. The primary purpose for such a device is to reduce emissions, but some other benefits are also gained through the process of vapor recovery including the ability to increase engine power output, improve gas mileage, and increase the amount of energy that is recovered from a tank full of exhaust. Vapor recovery services are widely used in upstream and downstream processes in the oil and gas industry. VRUs are also used in refineries, oil & gas, and chemicals.

A vapor recovery unit is also used to recover vapors emitted directly into the environment. Vapors present in storage tanks are economically beneficial and harmful to the environment. The unit is used to restrict, store, withdraw, and refine vapor from the storage tanks. Four main components of the vapor recovery unit are, such as scrubber, switching device, gas compressor, and variable frequency drives. Moreover, vapor recovery services are in high demand due to its environmentally friendly and efficient nature. VRUs can help reduce harmful methane emissions from the crude oil storage tanks. In the United States, at the end of September 2019, working storage capacity for crude oil at refineries and tank farms amounted to 653 million barrels. Moreover, in July 2020, the U.S. and India signed an agreement for cooperating on emergency crude oil reserves, including the possibility of India storing oil in the U.S.

The cost may vary greatly depending on the volume of liquid that needs to be extracted and the size of the compressor used. Moreover, it is important to understand the capabilities and limitations of the particular model of the vapor recovery unit. The same process of extraction can be done in reverse if the volume of the liquid that needs to be recovered is greater than what can fit into the available space in the device. It is important to ensure that the extraction process is properly documented to allow for future reference and should be performed by an experienced operator.

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