Process Description Feedstock - oil is divided into two streams. The first stream is heated in heat exchanger 1, while cooling the gasoline fraction. The second stream is divided into two streams, the first is heated in heat exchanger 2 with a pre-cooled diesel fraction, and the second is heated in heat exchanger 3, cooling pre-cooled fuel oil. Further, streams are mixed with the first stream and exposed to electric desalination at unit 4 to produce desalinated oil and drainage water. Desalinated oil is divided into two streams, the first is heated in heat exchangers 5 by part of diesel fraction from stripping column, and the second is heated in heat exchanger 6 by fuel oil coming from CDU column. Then these streams are fed into CDU column. The diesel fraction after heat exchanger 2 is further cooled in heat exchanger 7 by an external refrigerant.
Process features
High degree of heat recovery for process streams at CDU outlet
Cooling of hydrocarbon fractions up to storage temperature without water coolers
Heat economy of 88 MJ per 1 t of oil
Technical Specification
Oil temperature: 15-25 °C
Product temperature: 30-35 °C (gasoline), 40-45 °C (diesel fuel), 80-110 °C (atmospheric residue)