MIDDLE DISTILLATE HYDROTREATING UNIT Russian patent published in 2024 - IPC C10G45/02 C10G45/22 

FIELD: various technological processes.

SUBSTANCE: invention relates to equipment for hydrotreating middle distillate fractions in the oil refining industry, specifically to a plant comprising a device for mixing a crude fraction with a hydrogen-bearing gas (HBG), heat exchangers 1–3, heater 4, reactor 5, hot separator 6, cooler 7, cold separator 8, reducing devices 9 and 10, and stabilization column 11. During operation of the plant, the fraction of raw material is divided into a first part and a second part, which is heated in heat exchanger 3 and mixed with the first part after mixing with HBG and heating in heat exchanger 1. Obtained crude mixture is heated in apparatus 4 and fed into reactor 5, from which a hydrogenate is removed, which is cooled in heat exchangers 2 and 3 and separated in separator 6 into vapours of a light fraction and a heavy fraction. Latter is heated in heat exchanger 2, reduced in device 9 and directed to lower part of column 11. Vapours of the light fraction are condensed in apparatus 7 and separated in separator 8 into HBG and the light fraction, which is reduced in apparatus 10 and directed to the upper part of column 11. From the top of column 11, vapours are removed, which are cooled and separated into gas and naphtha, which is partially returned to column 11. Stable diesel fraction from the bottom of column 11 is cooled in heat exchanger 1 and removed.

EFFECT: reduction of energy consumption by heat and/or cold flows.

1 cl, 1 dwg, 1 ex