Improved delayed coking process

A delayed coking and process technology, which is used in the coking of carbon-containing materials, coke ovens, petroleum industry, etc., can solve the problems of high investment and energy consumption, and the tendency of coking heating furnace tubes to increase.
CN101597518AActive Publication Date: 2009-12-09CHINA PETROCHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROCHEMICAL CORP
Publication Date
2009-12-09

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Abstract

The invention discloses an improved delayed coking process, aiming at solving the defects of serious heating furnace coking, low liquid product yield and the like in the current delayed coking processes. The process is characterized in that feeds are heated to 360-460 DEG C in a convection chamber or a convection chamber and a radiation chamber of the heating furnace, and then enter a visbreakingreactor for cracking reaction; heavy oil separated from the reaction product enters the radiation chamber of the heating furnace to be heated to 480-515 DEG C and then enters a coke tower; oil gas out of the coke tower singly enters or enters a fractionating tower after being mixed with the gas in the visbreaking reactor for fractionation. By adopting the process of the invention, the delayed coking liquid product yield can be improved, the coke yield reduced, the operation cycle of the delayed coking unit lengthened and the equipment investment lowered at the same time.
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Description

technical field

[0001] The invention belongs to the field of petroleum refining, in particular to an improved delayed coking process. Background technique

[0002] With the development of the global economy, the demand for light and clean fuel oil is also growing rapidly, and the quality of crude oil is getting worse and worse with the continuous increase of crude oil extraction, mainly manifested in high density, high viscosity, high content of heavy metals, High sulfur content, high nitrogen content, high colloid and asphaltene content, which brings great difficulties to the processing of crude oil, especially the secondary processing of heavy oil.

[0003] At present, the processing of heavy oil is mainly based on the decarbonization process, and the delayed coking process has the characteristics of thorough decarbonization, simple process, mature technology, and low equipment investment, and has become one of the important processes for heavy oil processing. However, wi...

Claims

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