Delayed coking method for increasing light oil yield

Abstract

This delay coking process achieves in more production of quality light oils and lower coke yield. It is carried out by adding light fraction of coal tar as coking resistant agent to increase the yield of light oils and to decrease the yield of coke. The process costs less than the prior arts in coking resistant agent with excellent coking effect. It can be used in various operations of heavy and residual oil coking process.

Description

technical field [0001] The invention belongs to a heavy oil delayed coking process, in particular to a method for increasing the yield of light oil products and reducing the yield of coke products in the delayed coking operation process. Background technique [0002] Delayed coking, as one of the heavy oil processing methods, has been used in the oil refining industry for many years. The process uses heavy and low-quality residual oil as raw material. After being heated by a heating furnace, it enters the coking tower, and is thermally decomposed in the coking tower to generate gas products, liquid products with different boiling points and coke products. [0003] At present, the raw material processed by the delayed coking unit of the refinery is getting heavier and heavier. Under the condition of circulation operation, the coke yield is as high as 30w%-40w%, and the liquid product is quite small. Since the delayed coking unit is limited by the coke yield, it has not been ...

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Problems solved by technology

The patent uses a single chemical or a mixture of chemicals, which is costly