HEAVY OIL HYDROFINING SYSTEM AND HEAVY OIL HYDROFINING METHOD Russian patent published in 2019 - IPC C10G65/08 

FIELD: oil and gas industry.

SUBSTANCE: present invention relates to the field of hydrofining of heavy oil, in particular to the heavy oil hydrofining system and the heavy oil hydrofining method. Method for heavy oil hydrofining involves mixing heavy crude oil with hydrogen and then feeding the mixture through a pre-hydrofining reaction zone, an intermediate reaction zone and a hydrofining reaction zone which are connected in series, where the sensor units are configured to detect pressure drop in each pre-hydrofining reactor in the pre-hydrofining reaction zone, and control unit is configured to receive pressure drop signals from sensor units; at the initial reaction stage, the pre-hydrofining reaction zone includes 3–6 pre-hydrofining reactors connected in parallel, transient reaction zone includes or does not include pre-hydrofining reactors; further, when the pressure drop in one of the pre-hydrofining reactors reaches a predetermined value, the pre-hydrofining reactor is switched from the pre-hydrofining reaction zone to the transition reaction zone and is referred to as the disconnected pre-hydrofining reactor I, wherein the pre-hydrofining reaction zone, the disconnected pre-hydrofining reactor I and the hydrofining reaction zone are connected in series; when the pressure drop in the next pre-hydrofining reactor reaches a predetermined value, the pre-hydrofining reactor is switched from the pre-hydrofining reaction zone to the transition reaction zone and is referred to as the disconnected pre-hydrofining reactor II, wherein the pre-hydrofining reaction zone, the disconnected pre-hydrofining reactor II, the disconnected pre-hydrofining reactor I and the hydrofining reaction zone are connected in series; other pre-hydrofining reactors are treated in the above method until all pre-hydrofining reactors are connected in series; wherein preset differential pressure in pre-hydrofining reactors makes 50–80 % of designed upper pressure drop for pre-hydrofining reactors.

EFFECT: method of hydrofining of heavy oil in accordance with the present invention can considerably prolong the period of operation of the hydrofining device of heavy oil.

20 cl, 1 dwg, 8 tbl, 6 ex