FIELD: petrochemical processes. SUBSTANCE: liquid working mixture is pumped from separator into ejector and liquid-gas mixture from the latter is fed into separator. Working medium is cooled in heat exchanger giving up its heat for heating circulating part of residue. Operation conditions maintained provide medium temperature in separator to be higher than temperature of working medium in the ejector nozzle inlet, the latter temperature to be higher than temperature of the residue in column outlet, and temperature of gas-vapor phase in the ejector inlet to be below the foregoing temperature. According to invention, installation is provided with separator, ejector outlet and pump inlet are connected to separator, and pump is connected to the ejector nozzle through heating heat exchanger. EFFECT: reduced operational expenses. 1 dwg
