Refinery gas hydrogenation combination process

Abstract

The invention discloses a refinery gas hydrogenation combination process. The process comprises the following steps: (a) mixing feedstock oil of paraffin and circulating oil with hydrogen in a hydrogen-dissolving device, and then enabling the product to enter hydrogenation catalyst bed layers in a hydrogenation reactor for carrying out a reaction under hydrogenation operating conditions, wherein agas-dissolving device is arranged between the every two adjacent catalyst bed layers; (b) after mixing of refinery gas and / or the hydrogen, entering the gas-dissolving device arranged between any adjacent catalyst bed layers, mixing the product with a reactant stream coming from the previous catalyst bed layer, and then entering the next catalyst bed layer for carrying out a reaction; (c) mixinga hydrogenation reactant stream, obtained in the step (b), with the refinery gas and the hydrogen in the gas-dissolving devices, and then enabling the product to enter hydrogenation catalyst bed layers in a supplementary hydrogenation reactor for carrying out a reaction under liquid phase hydrogenation operating conditions; (d) separating hydrogenation reaction effluent, obtained in the step (c),into a gas phase and a liquid phase, removing hydrogen sulfide from the separated gas phase and then continuously separating to obtain hydrogen and the hydrotreated refinery gas. The method can realize the hydrotreatment of the refinery gas and the production of paraffin products at the same time.

Description

technical field [0001] The invention belongs to a hydrogenation process of oil refining technology, and relates to a combined hydrogenation process of gas in an oil refinery, in particular to a combined hydrogenation method for hydrogenation treatment of oil refinery gas and production of paraffin products. Background technique [0002] Paraffin wax is a solid petroleum product obtained by solvent dewaxing and deoiling of vacuum distillate oil. It is an important raw material for medicine, daily chemical industry and other fine chemical industries. Paraffin wax can be roughly divided into paraffin wax, high melting point petroleum wax, microcrystalline wax, vaseline and so on. Paraffin wax for these purposes needs to be deeply refined to remove sulfur, nitrogen compounds and condensed aromatic hydrocarbons contained therein, in order to be harmless to the human body. Paraffin refining includes clay refining and hydrofining, among which hydrofining technology is a process in...

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Problems solved by technology

[0006] In summary, the refinery gas hydrotreating process in the prior art is a gas phase reaction, while the paraffin hydrogenation is a liquid phase reaction, and the two reaction types are completely different. Therefore, refinery gas hydrotreating and paraffin liquid phase hydrogenation Combined methods are rarely reported

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