FIELD: oil and gas industry.
SUBSTANCE: method of cleaning from oil and petroleum vapours of vapour-gas medium, produced during the storage of oil or petroleum in a collector or when filling a tank with oil or petroleum, includes pumping absorbent into a jet liquid-gas apparatus, pumping the vapour-gas medium by the jet liquid-gas apparatus out of the oil or petroleum filled tank or oil or petroleum collector, compression of the vapour-gas medium with the absorbent absorbing the oil or petroleum vapours from it, supply of the two-phase mixture obtained in the outlet of the jet liquid-gas apparatus into a separator, separation of the two-phase mixture into a gaseous phase, partially cleaned from the oil or petroleum vapours, and saturated absorbent containing dissolved oil or petroleum vapours, supply of the saturated absorbent from the separator into a vacuum stripper an the gaseous phase into the second jet liquid-gas apparatus, supply of the absorbent by the second pump into the second jet liquid-gas apparatus and compression of the gaseous phase in it with the absorbent absorbing the oil or petroleum vapours in the gaseous phase, supply of the two-phase mixture obtained in the outlet of the second jet liquid-gas apparatus into the second separator, separation of the two-phase mixture in the second separator into a gaseous medium, cleaned from the oil and petroleum vapours, and into saturated absorbent containing dissolved oil or petroleum vapours, supply of the saturated absorbent from the second separator into the vacuum stripper and extraction of the gaseous medium into the atmosphere, isolation of the dissolved oil or petroleum vapours from the saturated absorbent in the vacuum stripper by keeping the pressure below the atmospheric pressure in the vacuum stripper, supply of the absorbent from the vacuum stripper to the pump inlet and the inlet of the second pump and of the oil or petroleum vapours into the vacuum production device of the vacuum stripper.
EFFECT: increased cleaning degree.
23 cl, 3 dwg
