Método y dispositivo para producir vacío en una columna de destilación de petróleo

摘要

The invention relates to the oil processing industry and can be used for producing vacuum in a vacuum petroleum distillation column. The inventive method involves pumping out a vapour-gas medium from the column by means of a gas-gas ejector in such a way that a vapour-gas mixture is formed at the entry thereof and supplying said mixture to a condenser for producing a gas mixture and a vapour phase condensate. The gas mixture is supplied from the condenser to a liquid-gas jet apparatus and the condensate is delivered to an additional separator. A hydrocarbon-containing condensate is removed from the additional separator for the intended use thereof and a water-containing condensate is fed to a steam generator for producing steam by supplying heat of a hot distillate evacuated from the vacuum column. The thus obtained steam is used in the gas-gas ejector as a high-pressure gas. The device comprises a line for supplying a distillate of petroleum distillation, a line for removing a distillate of petroleum refining, the steam generator and the additional separator. The invention makes it possible to reduce energy consumption, increase vacuum depth and to exclude the use of a water vapour delivered from an external source.