| 摘要 |
<p>The invention relates to a method for a high-temperature distillation of risidual oil in a limited time. The inventive method is improved by a technically simple recovery of a small residual fraction from a gas and/or oil vapour mixture produced by a mixing unit (1). Said small residual fraction contains large quantity of undesirable polluting catalytic substances (CCR, Ni, V, asphaltenes). For this purpose, the gas and/or oil vapour mixture produced by the mixing unit (1) is dissolved with gas or water vapour in a tower (17) at a temperature of 450 ??C in such a way that a high-boiling point fraction which has a high content of the pollutant substances and whose initial boiling point is higher than 450 ??C is condensed and extracted. Another improvement of the method consists in introducing a non-condensed oil produced in the tower (17) into a fractionating tower (19) where said oil is decomposed in order to produce a depressurised diesel fraction having a low content of the polluting substances and a gasoline/diesel fraction.</p> |
