Hydrotreating method for heavy hydrocarbon raw material by adopting up-flow reactor

Abstract

The invention discloses a method for processing a heavy hydrocarbon raw material by adopting up-flow reactors. The method comprises the following steps: at least one up-flow reactor is adopted, at least two catalyst bed layers are arranged in each up-flow reactor, and each up-flow catalyst bed layer is filled with a hydrotreating catalyst; a carrier of the hydrotreating catalyst is spherical and at least comprises seven channels penetrating through the carrier, the first channel, the second channel, and the third channel penetrate through the sphere center of the catalyst carrier, are communicated with one another and are perpendicular to one another in pairs, and the fourth channel, the fifth channel, the sixth channel and the seventh channel are connected end to end and communicated; thecatalyst bed layers of the up-flow reactor are arranged along the material flow direction, and the particle size of the hydrotreating catalyst of each bed layer is gradually reduced. Specific catalyst grading is adopted in the method, the method is suitable for the up-flow residual oil hydrotreatment process, and has the characteristics of high void ratio, strong capacity of removing metals, goodpermeability, reduced bed pressure and uniform material distribution.

Description

technical field [0001] The invention relates to a hydrogenation treatment technology for hydrocarbon raw materials, in particular to a method for hydrogenation treatment of heavy hydrocarbon raw materials by using an upflow reactor. Background technique [0002] As crude oil becomes heavier and worse, more and more heavy oil and residual oil need to be processed. The processing of heavy oil and residual oil not only needs to be cracked into products with low boiling points, such as naphtha, middle distillate oil and vacuum gas oil, but also to increase their hydrogen-carbon ratio, which requires decarbonization or Hydrogenation method to achieve. Among them, the decarbonization process includes coking, solvent deasphalting, heavy oil catalytic cracking, etc.; the hydrogenation process includes hydrocracking, hydrofining, hydrotreating, etc. The hydrogenation process can not only hydrogenate and convert residual oil, improve the yield of liquid products, but also remove het...

AI Technical Summary

Problems solved by technology

In the upflow reactor, the activity of the catalyst in the upflow reactor gradually increases along the flow direction, and the hydrogen consumption and heat release of the high-activity catalyst bed gradually increase. The local lack of hydrogen in the bed and the disturbance of the bed can easily cause hot spots

In addition, due to the insufficient ability of the catalyst to deposit metal, the deactivation is accelerated, which affects the performance of the catalyst and the operating cycle of the device.

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