METHOD OF OIL GAS CLEANING OF HYDROGEN SULPHIDE Russian patent published in 2015 - IPC B01D53/48 C01B17/05 C25B1/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, and can be used to prepare oil gas for use. Hydrogen sulphide contained in the oil gas is removed using three mass-transfer columns, operating under principle of counter-flow circulation. The oil gas is supplied to bottom part of the first mass-transfer column, and pre-cooled water is supplied by counter flow to it top part, at that from top part of this mass-transfer column the cleaned oil gas is removed. Pre-heated and saturate with hydrogen sulphide water is supplied to top part of the second mass-transfer column, to its bottom the air is injected by counter flow, and during mass transfer the hydrogen sulphide is washed out it, at that the cleaned water from bottoms of the second mass-transfer column is cooled and supplied to top part of the first mass-transfer column with creation of the closed circulation loop. Hydrogen sulphide saturated air mixture is injected to bottoms of the third mass-transfer column, to its top part the electrolyte is supplied, is dissolves hydrogen sulphide contained in the air mixture, then hydrogen sulphide saturated electrolyte from bottoms of the third mass-transfer column is subjected to the electrolysis with decompounding of the electrolyte dissolved hydrogen sulphide to sulphur and hydrogen, then hydrogen together with residual gases is returned to the process, and cleaned of the hydrogen sulphide electrolyte is supplied to top part of the third mass-transfer column creating the closed loop of the electrolyte circulation.

EFFECT: invention ensures high effective oil gas cleaning of hydrogen sulphide, with cleaning degree up to 99,99%.

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