A liquid-phase hydrogenation system and liquid-phase hydrogenation method

Abstract

The invention discloses a liquid-phase hydrogenation system and a liquid-phase hydrogenation method. The system includes a hydrogen-dissolving zone and a high-efficiency hydrogenation reaction zone. A number of hydrogen-dissolving equipment are arranged in the hydrogen-dissolving zone, and the hydrogen-dissolving equipment includes a hydrogen-dissolving The shell of the equipment, the shell of the hydrogen dissolving equipment contains several parallel hydrogen dissolving components; the high-efficiency hydrogenation reaction zone includes a plurality of series tubular reactors; the shape of the tubular reactor is "U-shaped", including straight The pipe section, the horizontal section where the bottom connects the straight pipe sections on both sides. The method of the present invention uses the "gas-in-oil" gas-liquid mixed fluid formed in the hydrogen dissolving zone as the feed material for the liquid-phase hydrogenation reaction, and enters the "U-shaped" tubular reactor in the high-efficiency hydrogenation reaction zone to undergo deep hydrogenation reaction , which can greatly reduce the supplementary hydrogen oil ratio in the hydrogenation reaction process, improve the utilization rate of hydrogen, reduce hydrogen consumption and energy consumption, and can continuously use the H produced in the reaction process 2 S, NH 3 Wait for the gas to move out of the reaction system, improve and maintain a high hydrogenation reaction rate and reaction efficiency, and realize deep hydrogenation reaction.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and specifically relates to a liquid-phase hydrogenation system and a liquid-phase hydrogenation method. Background technique [0002] Compared with the conventional trickle bed gas\liquid\solid three-phase hydrogenation process, the liquid phase hydrogenation technology has the advantages of simple process flow, saving investment, reducing production cost, and high reaction efficiency. In the conventional trickle bed hydrogenation reaction process, hydrogen is mainly used for mass transfer, that is, the speed at which hydrogen diffuses from the gas phase and dissolves into oil is the rate-controlling step of the entire hydrogenation reaction. The liquid-phase hydrogenation process eliminates the influence of hydrogen diffusion and mass transfer, so that the hydrogenation reaction is carried out in the kinetic control zone, that is, the hydrogen is dissolved in the raw material oil to meet t...

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Problems solved by technology

In this method, on the one hand, the combined use of the reaction system, circulation system and heating furnace system makes the reaction process very complicated, costly and difficult to operate; on the other hand, a large amount of circulating materials are introduced, which increases the total volume of the reactor; The sub-ordinary method of hydrogen dissolution and mixing cannot realize the stable dissolution and dispersion of hydrogen, and causes a lot of waste of hydrogen, which reduces the utilization rate of hydrogen; conventional fixed-bed reactors are difficult to achieve deep hydrogenation

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