| 摘要 |
petroleum processing. SUBSTANCE: invention relates to crude oil refining to produce straight-run gasoline, diesel fuel , and mazut. Raw material is pumped through heat-exchangers wherein hydrocarbon material is heated at the expense of discharged products, which are simultaneously cooled. Raw material is then divided parts according to number of first rectification columns and finally heated by means of direct-fired electric kilns. Hot raw material is fed into first rectification columns to be separated into desired fractions, whose vapors are passed through first dephlegmators. Non-condensed light gasoline vapors escaping dephlegmators are used as heat-transfer agents in corresponding heat-exchangers and then enter coolers. Liquid products are returned into the first rectification columns. Bottom residues from these columns are heated, combined, and pumped into second rectification column, from which heavy gasoline, diesel fuel, and mazut are discharged and passed through second dephlegmator into corresponding heat-exchangers as heat-transfer agents. Heavy gasoline is cooled in cooler and combined with light gasoline. Maintenance of predetermined heat balance in the product concentrating section of all columns is provided by direct-fired kilns. EFFECT: reduced power consumption and simplified process control. 10 cl, 2 dwg, 9 tbl |
