Liquid-phase circulating hydrogenation treatment method capable of reinforcing gas-liquid mass transfer

Abstract

The invention discloses a liquid-phase circulating hydrogenation treatment method capable of reinforcing gas-liquid mass transfer. The process flow adopted by the method comprises: part of hydrogenation circulating oil and a fresh raw material are mixed to form a liquid-phase mixed material to be filled into supergravity gas-liquid hydrogen dissolution equipment together with hydrogen; through the drive of the high-speed rotation of a feeding rotor, gas-liquid countercurrent full contact is formed; the mixed liquid-phase material in which hydrogen is dissolved is discharge out from the bottom of the supergravity gas-liquid hydrogen dissolution equipment and contacted with a catalyst to undergo a hydrogenation reaction, and part of a liquid phase obtained after reaction is circulated. Compared with the prior art, the method has the advantages that: the rotation of the feeding rotor in the gas-liquid hydrogen dissolution equipment forms a supergravity field, so the gas-liquid mass transfer efficiency is increased greatly, and the liquid phase material can fully dissolve hydrogen; meanwhile, gas impurities such as H2S and NH3 in a reaction system can be removed efficiently, so that the hydrodesulfurization, denitrification, aromatic saturation, cracking and other reactions are promoted.

Description

technical field [0001] The invention relates to a liquid-phase circulating hydrogenation treatment method, in particular to a method in which liquid-phase materials are fully dissolved in hydrogen and then enter a reactor for hydrogenation reaction. Background technique [0002] Conventional fixed-bed hydrogenation process is an economical and effective means to remove sulfur, nitrogen and other impurities in raw oil. In the operation of fixed-bed hydrogenation units, higher hydrogen-to-oil ratio and hydrogen partial pressure are often used to ensure the service life of the catalyst and promote the reactions of hydrodesulfurization, denitrogenation, aromatics saturation and cracking. However, the high-pressure hydrogen circulation system requires high investment and operating costs, which indirectly increases the production cost of oil products. If the hydrogen flow rate in the hydroprocessing process can be reduced and the hydrogen circulation system and hydrogen circulati...

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Problems solved by technology

But this technology does not disclose the specific way of dissolving hydrogen, and after dissolving hydrogen, there is also a waste gas separation device in the separator set before the reactor

Although this can remove a small amount of waste gas that affects the hydrogenation reaction (mainly hydrogen sulfide and ammonia removed after the reaction), the waste gas separation effect is poor, and part of the dissolved hydrogen is separated from the raw material oil, resulting in The solubility of hydrogen in the medium decreases, which ultimately affects the effect of hydrogenation to remove impurities

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