Liquid phase circular hydrogenation treatment method capable of improving mixed amount of hydrogen

Abstract

The invention discloses a liquid phase circular hydrogenation treatment method capable of improving mixed amount of hydrogen. The process flow adopted by the method comprises that: a liquid-phase material ( including fresh raw material oil, after-reaction circulating oil and circulating oil in a supergravity hydrogen mixing equipment) and hydrogen are filled into the supergravity hydrogen mixing equipment at the same time; and the hydrogen is torn and cut into lots of micro air bubbles through the high-speed rotation of a gas-liquid mixing impeller, a gas-liquid mass transfer efficiency is increased greatly, hydrogen is dissolved in the liquid-phase material in a saturated state, and the lots of micro air bubbles are dispersed in the liquid-phase material in an emulsified state so as to be brought into a reactor to undergo a hydrogenation reaction. In the method disclosed by the invention, the adoption of the supergravity hydrogen mixing equipment greatly promotes the dissolution of hydrogen and more effectively removes gas-phase impurities such as hydrogen sulfide and ammonia, so as to promote reactions such as hydrodesulfurization, denitrification, aromatic saturation and cracking.

Description

technical field [0001] The invention relates to a liquid-phase circulating hydrogenation treatment method, in particular to a liquid-phase circulating hydrogenation method for increasing the amount of hydrogen dissolved in liquid-phase materials. 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 circulation ...

AI Technical Summary

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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