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Combined technique of hydrotreating and delay coking of residual oil

A technology of hydrotreating and delayed coking, which is applied in hydrotreating process, petroleum industry, treating hydrocarbon oil, etc. It can solve the problems of no specific combination and achieve the effects of reducing energy, saving investment costs and reducing heat loss

Active Publication Date: 2014-08-20
CHINA PETROLEUM & CHEM CORP +1
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  • Description
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Problems solved by technology

The combined process is only based on the liquid feed requirements of different devices for the joint use of devices, without specific combination of the characteristics of various processes, try to maximize the advantages of each process

Method used

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  • Combined technique of hydrotreating and delay coking of residual oil

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Embodiment

[0026] This embodiment adopts the fluidized bed residual oil hydrotreating-delayed coking method provided by the present invention, and the process is shown in figure 1 , that is, the residual oil undergoes a hydrogenation reaction in a hydrotreating unit, and the reaction product is separated to obtain gas and residual oil hydrogenation liquid phase components. The obtained residual oil hydrogenation liquid phase components enter the delayed coking fractionation tower to separate different fractions. The products are gas, gasoline, diesel oil, and the fractions above the wax oil include hydrogenated wax oil and heavy oil and coker wax oil and heavy oil, which are recycled to Coke tower for processing. Table 1, Table 2, and Table 3 are the properties of raw oil, process conditions and test results, respectively.

[0027] Table 1 Raw material properties

[0028] project Residue raw material Ebullating Bed Residue Hydrogenation Liquid Phase Components Densit...

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Abstract

The invention discloses a combined process method of residual oil hydrotreating and delayed coking. In this method, the residual oil hydrotreating adopts the fluidized bed hydroprocessing process, including: the liquid phase product after the residual oil raw material is subjected to the fluidized bed hydroprocessing is not subjected to fractionation, directly enters the coking fractionation tower, and contacts with the oil gas generated by coking in countercurrent , leaching the coke powder carried in the high-temperature oil and gas, and the light components generated by hydrogenation and coking are taken out of the unit together, and the fraction above the wax oil is recycled back to the delayed coking unit. Compared with the prior art, the method can save the hydrogenation fractionation tower, reduce investment cost; expand the source of coking raw materials, increase the yield of coking light oil, and at the same time, make full use of reaction heat energy and reduce production energy consumption.

Description

technical field [0001] The invention relates to a method for lightening residue oil, specifically a process for producing light distillate oil by organically combining residue oil hydrogenation treatment and delayed coking and using residue oil as a raw material. Background technique [0002] As crude oil becomes heavier and worse, more and more residues need to be processed. The processing of heavy and residual oil not only needs to crack it into products with low boiling point, such as naphtha, middle distillate oil and vacuum gas oil, etc., but also to increase their hydrogen-carbon ratio, which requires decarbonization or Hydrogenation method to achieve. The decarbonization process includes coking, solvent deasphalting, heavy oil catalytic cracking, etc.; hydrogenation includes hydrocracking, hydrofining, etc. The hydrogenation method can not only hydrogenate and convert residual oil, improve the yield of liquid products, but also remove heteroatoms, which is beneficia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/00
Inventor 张学萍蒋立敬初人庆矫德卫
Owner CHINA PETROLEUM & CHEM CORP
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