Heavy-hydrocarbon hydrogenation treatment method

Abstract

The invention discloses a heavy-hydrocarbon hydrogenation treatment method, which comprises the following contents: an upper flow reactor (hereinafter referred to as UFR) is connected in series with at least one lower flow type fixed bed reactor to be used, and heavy-hydrocarbon raw materials sequentially pass through the UFR and the lower flow type fixed bed reactor, wherein (1) the heavy-hydrocarbon raw materials and hydrogen gas are mixed, are heated to the reaction temperature required by the UFR at a radiation section of a heating furnace and then enter the UFR, the volume ratio of hydrogen to oil at an inlet of the UFR is 150:1-300:1; and (2) the UFR reactor effluents are mixed with the hydrogen gas heated by a convection section of the heating furnace and enter the lower flow type fixed bed reactor, and the volume ratio of hydrogen to oil at an inlet of the lower flow type fixed bed reactor is 400:1-1200:1. The method has the advantages that the cold hydrogen gas at a reverse inlet of a fixed bed is heated, the reaction temperature of the reverse inlet of the fixed bed can be flexibly controlled, the partial catalyst performance of the fixed bed of a device is sufficiently realized, and the operation period of the device is prolonged.

Description

technical field [0001] The invention relates to a hydrocarbon hydrogenation treatment technology, in particular to a hydrogenation treatment process for heavy hydrocarbon raw materials including atmospheric residue oil and vacuum residue oil. 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 ...

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Problems solved by technology

[0006] In the existing combined process of UFR reactor and downflow fixed bed reactor, there is a problem that the operating cycle and reaction temperature of UFR reactor and downflow fixed bed reactor do not match with the extension of operation time. There is no temperature raising means at the inlet, and the reaction activity of the downflow fixed bed cannot be fully exerted, which is not conducive to prolonging the operation period

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