A device and method for co-conversion of heavy low-quality oil and coal

Abstract

The invention discloses a device and method for high-efficiency co-conversion of heavy and inferior oil and coal. The device includes a feed unit, a gasification unit, a cracking unit, and a coke powder return unit; the feed unit includes a raw oil feed system and The pulverized coal feeding system completes the stable transportation of raw oil and pulverized coal; the gasification unit includes a gasification zone, a gasification separator, and a particle reflux device to complete the gasification of semi-coke and coal; the cracking unit includes a premixing zone and a lift The cracking area completes the co-cracking of raw oil and solid medium; the coke powder return unit includes a cracking separator, a pressure swing collection tank, a secondary pressure swing buffer tank, a semi-coke collection tank, and a semi-coke feeder to complete the gas-solid separation And solid semi-coke gasification zone and cracking zone return materials; the invention effectively makes up for the low yield of heavy and inferior oil cracking petroleum coke alone, and the defects of limited heat supply, and provides heat carrier and hydrogen-rich reaction gas to effectively improve the cracking of heavy and inferior oil The coking problem caused by the side wall effect in the process can be improved, and the yield and quality of cracked oil can be improved.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a device and method for co-conversion of heavy and low-quality oil and coal. Background technique [0002] With the heavy and inferior quality of crude oil, the output of inferior heavy oil or residual oil (heavy oil, super heavy oil, oil sand bitumen, vacuum residual oil, deoiled bitumen, etc., hereinafter referred to as inferior heavy oil) has increased dramatically. The upgrading technology of inferior heavy oil can be divided into two routes: decarburization and hydrogenation, mainly including delayed coking, hydrocracking, catalytic cracking, etc. Due to the problems of catalyst deactivation, operating cost and technical maturity, the catalytic processing process represented by catalytic cracking and hydrocracking is difficult to meet the processing needs of inferior heavy oil. The delayed coking process produces a large amount of coke, especially...

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Problems solved by technology

[0003] The pyrolysis process of heavy and low-quality oil is easy to coke, and the amount of petroleum coke produced at the same time is small. How to avoid the reaction and coking of heavy and low-quality oil is the key. It is difficult to realize the integrated reaction of pyrolysis and gasification of heavy and low-quality oil alone

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