Oil gas recovery device and method of coating adsorption combination technology

Abstract

The invention discloses an oil gas recovery device and a method of coating adsorption combination technology, belonging to a technology method combing film separation technology with film adsorption technology to recover and treat oil gas. In the method, mixed gas of various oil gases and air, produced in various storing and transporting processes, is sent into an oil gas separator via a gas header to be preliminarily separated, and mixed gas of granule oil gas and air enters a film separator for further separation under the action of the differential pressure of a vacuum pump P1; air which isseparated from the film separator and contains a small amount of oil gas enters an absorber A or an absorber B for adsorption processing; adsorbed air almost containing no oil gas is discharged intoatmosphere via a discharging port. In addition, large-grain oil drops separated by the separator, penetration gas enriched by the film separator and desorption gas which is desorbed from the absorberA or the absorber B are sent into an underground storage tank via an oil return pipe or directly used. Adsorbent in two absorbers is cylindrical activated carbon specially used for recovering oil gas,two absorbers alternately perform vacuum desorption under the action of a vacuum pump P2 with desorption time being15-20 minutes. The oil gas recovery rate of the invention can reach more than 98%, has almost zero discharge of oil gas in effluent gas and can obtain obvious environment benefit and economic benefit.

Description

technical field [0001] The invention relates to an oil gas recovery and treatment system in the technical field of environmental protection and energy saving, in particular to an oil gas recovery device and method for a gas station and an oil depot using a combined process of membrane separation and adsorption. Background technique [0002] With the improvement of people's quality of life, the awareness of environmental protection has gradually increased. As for the gas stations and oil depots built in urban offices and living communities, since oil and gas recovery systems are rarely installed, part of the oil and gas will volatilize into the air during the process of refueling locomotives or filling oil to the oil depot, which not only causes Air pollution and continuous volatilization of oil and gas will also cause serious economic losses. According to statistics, in 2003, my country had more than 16 million vehicles of various types, consuming 60 million tons of gasolin...

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Problems solved by technology

[0005] Application No. 200620168794.3 Patent "Membrane Oil Gas Recovery System" and Application No. 200720305625.5 Patent "Oil Gas Recovery Treatment System for Gas Stations", both patents only use the membrane separation method. In the absence of maturity, it is difficult for a single process to meet the oil and gas concentration emission standards stipulated by the state

Reports on the oil and gas recovery method of "membrane separation and adsorption composite process" that are closely related to the technical characteristics of the present invention and applied to gas stations or oil depots have not yet been published.

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