PROCEDURE AND INSTALLATION FOR HEAVY MINERAL OIL THERMAL CRACKING Russian patent published in 2011 - IPC C10G9/36 

FIELD: oil and gas production.

SUBSTANCE: present invention refers to process of treatment for heavy mineral oil continuous thermal cracking and to installation for physical treatment according to process. Here is disclosed procedure for heavy mineral oil thermal cracking. The procedure facilitates operation of the installation of thermal cracking. The installation consists of a cracking-furnace for heating heavy mineral oil and of two or more lines each containing the first and second reaction tanks. Heavy mineral oil heated in the cracking furnace is supplied into these tanks. Further, the installation consists of one distillation column for separation of gaseous substances withdrawn from the corresponding reaction tanks of each line. Also, each line operates under repeated cycles. Each cycle includes withdrawing heavy mineral oil from the cracking furnace, supply of withdrawn heavy mineral oil into the first reaction tank and supply of withdrawn heavy mineral oil into the second reaction tank upon completion of supply of withdrawn heavy mineral oil to the first reaction tank. Steam is blown into each reaction tank from beneath of each reaction tank during supply of heavy mineral oil. Steam directly contacts heavy mineral oil subjected to thermal cracking. Notably, produced gaseous products of cracking and steam in each reaction tank are withdrawn through an upper outlet of each reaction tank and are introduced into the distillation column. Generated pitch is transferred to reservoirs for liquid pitch storage. Separation process is implemented by distillation in the distillation column. During separation together with gaseous products of the process there are generated heavy cut ends of cracking oil which are mixed with heavy mineral oil supplied into a bottom section for successive feed of the mixture to cracking furnaces. Part of said mixture is fed directly to the reaction tanks escaping cracking furnaces, ensuring delay in phase for the cycle repeated in each line so, that the installation of thermal cracking operates with different time of commencement of supply into the first reaction tank in each line. There is disclosed the installation for implementation of the above described procedure.

EFFECT: reduced instability in amount of gaseous components supplied to distillation column; raised efficiency of separation and of installation in whole.

6 cl, 1 tbl, 5 dwg