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Combined technique of hydrotreating and delay coking of residual oil

A hydrotreating and delayed coking technology, applied in hydrotreating process, petroleum industry, treating hydrocarbon oil, etc., can solve the problem of no specific combination, and achieve the effect of reducing energy, saving investment cost and reducing heat loss

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 Properties of raw materials

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

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Abstract

The invention discloses a combined technique of hydrotreating and delay coking of residual oil. In the technique, the residual oil hydrotreating adopts an ebullated bed hydrogenation process which comprises the following steps: directly feeding a liquid phase product of residual oil subjected to an ebullated bed hydrogenation process into a coker fractionating tower without fractionation, performing countercurrent contact on the liquid phase product and an oil gas generated through coking, leaching coke powder in the oil gas at a high temperature, discharging a light component generated through hydrogenation and a light component generated through coking from a device together, and circulating wax oil and the fractions above the wax oil back to a delayed coking device. Comparing with the prior art, the combined technique disclosed by the invention can be used for omitting a hydrogenation fractionating tower, reducing the investment cost, enlarging the source of coking raw materials, improving the light oil yield from coking, meanwhile, fully utilizing reaction heat, and reducing the energy consumption in production.

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 Applications(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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