METHOD FOR DELAYED COKING OF OIL RESIDUES Russian patent published in 2012 - IPC C10B55/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of oil processing. The method includes heating of source raw materials with subsequent formation of secondary raw materials, heating of secondary raw materials in a reaction furnace 2 and their supply to a coking chamber 3, where the coke and steam-liquid coking products are produced, fractionating of the latter in a rectification column 4 with production of gas, benzine, light and heavy gas oils and stillage bottoms of coking, thermal cracking of the heavy gas oil, at the same time the secondary raw materials are formed in an evaporator 1, connected by vapours with the rectification column 4, by mixing of the source raw materials with a part of the heavy gas oil supplied from the rectification column into the evaportator in the form of a recirculate, and formed products of thermal cracking of the remaining part of the heavy gas oil are mixed with stillage bottoms of coking, and the produced mixture is introduced into secondary raw materials prior to supply into the coking chamber 3.

EFFECT: increased overhaul life of a plant.

1 dwg, 2 ex, 2 tbl