LOW-PRESSURE GAS CLEANING PLANT FROM HYDROGEN SULPHIDE Russian patent published in 2019 - IPC B01D53/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry and can be used for cleaning natural or associated petroleum gases from hydrogen sulphide, thiols, water and higher hydrocarbons. Low-pressure gas cleaning unit from hydrogen sulphide comprises a gas jet ejector to which a high-pressure natural gas pipeline and a low-pressure associated petroleum gas pipeline are connected. On the ejector there is a heat exchanger connected by pipelines to the heat carrier preparation and recycling unit. Ejector outlet is connected to membrane gas-separation module having two outlets: one for cleaned gas transportation pipeline to consumer, the other one for pipeline for discharge of hydrogen sulphide passing through semipermeable membrane to flare unit for combustion.

EFFECT: unit enables to involve associated petroleum gas in the process of purification, which increases total amount of purified gas supplied to consumer, eliminates flaring of associated petroleum gas at flare facilities, and also excludes formation of solid gas hydrates in pipeline.

1 cl, 1 dwg