FIELD: mechanical engineering. SUBSTANCE: proposed pump-ejector plant is designed for creating vacuum, evacuation and compression of different gaseous media. Gaseous medium is evacuated first by steam- gas ejector and mixture obtained from this ejector is pressure-fed into countercurrent condenser-separator into which condensing liquid of hydrocarbon composition is delivered. Pressure of saturated vapors of condensing liquid medium is lower than pressure of saturated steam. In process of countercurrent motion in condenser-separator, condensing liquid medium condenses steam and easily condensable components of evacuated gaseous medium. Part of steam condensate is let out through connections of condenser-separator. Remaining part of steam condensate and condensed components of gaseous medium are directed into inlet separator, and non-condensed components of steam-gas medium are evacuated in form of gaseous medium from condenser-separator by means of liquid-gas ejector of first stage. In inlet separator mixture of condensates getting from condenser-separator is separated into water and condensate of handled gaseous medium. Water from inlet separator is directed into water outlet pipeline, and gaseous medium condensate is directed from inlet separator into first stage separator where water remnants are separated from liquid component of medium mixtures and then liquid working medium in mixture with condensate of handled gaseous medium is delivered to pump inlet, and water from first stage separator is directed to water outlet pipeline. Installation has steam-gas ejector, countercurrent barometric condenser-separator and inlet separator. Nozzle of steam-gas ejector is connected to steam pressure source. Gas inlet of steam-gas ejector is connected to source of handled gaseous medium. Outlet of steam-gas ejector is connected to countercurrent condenser-separator which is connected to gas inlet of first stage ejector and to inlet separator. Countercurrent condenser-separator is provided with condensed water outlet connections and device to supply condensing liquid medium of hydrocarbon composition into condenser- separator. Pressure of saturated vapors of condensing liquid is lower than pressure of saturated steam. Inlet separator is connected to first stage separator. EFFECT: increased efficiency of evacuation of gaseous medium. 5 cl, 1 dwg
