Gas-liquid distribution equipment and fluidized bed hydrogenation reactor

Abstract

The embodiment of the invention relates to the technical field of gas-liquid distribution devices, and provides gas-liquid distribution equipment and a fluidized bed hydrogenation reactor. The gas-liquid distribution equipment comprises a gas-liquid distribution disc and a floating valve plate, the floating valve plate is arranged above the gas-liquid distribution disc, and the gas-liquid distribution disc comprises a distribution disc body and a plurality of gas-liquid distributors arranged on the distribution disc body. The fluidized bed hydrogenation reactor is internally provided with the gas-liquid distribution equipment. The equipment provided by the invention has good operation flexibility and good non-return effect, and can effectively avoid the problems of hot spots, coking, temperature runaway and the like in a catalyst bed layer.

Description

technical field [0001] The invention relates to the technical field of gas-liquid distribution devices, in particular to a gas-liquid distribution device and an ebullated bed hydrogenation reactor. Background technique [0002] Ebullated bed hydrogenation reaction refers to the process of hydrogenation reaction of feedstock oil (mainly in liquid phase) and hydrogen (gas phase) on catalyst (solid phase). Hydrogenation reaction mainly occurs in hydrodesulfurization, hydrodenitrogenation and hydrogenation saturation , Hydrocracking, etc. The reactor operates in the boiling state of gas, liquid and solid. The catalyst is in a boiling state driven by the raw material and hydrogen entering from the bottom of the reactor, which is in a completely different fluid state from the fixed bed reactor. The ebullating bed hydrogenation reaction can handle low-quality feedstock oil with high metal and high asphaltene content. The reaction has the characteristics of small pressure drop, uni...

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Problems solved by technology

[0003] However, the uneven distribution of the initial gas-liquid in the ebullating bed will lead to hot spots in the reactor, catalyst coking, overheating and other hazards that affect product quality and unsafe production. Therefore, stable gas-liquid distribution is very important for improving the flow characteristics and Catalyst utilization is very important, and gas-liquid distribution equipment is an internal component that has an important impact on the initial gas-liquid distribution in the reactor

At present, when the gas-liquid distribution device used in the fluidized bed distributes gas-liquid, the gas phase exists in the form of large bubbles or a continuous phase, and the contact surface of the gas-liquid two-phase is limited, which is not conducive to the uniform distribution of the gas-liquid two-phase, and the gas in the liquid phase It is also difficult to increase the content rate

In addition, most of the current mainstream fluidized bed gas-liquid distributors use spherical balls for non-return, and the non-return balls will collide and wear after long-term operation, the anti-return effect will deteriorate, and it is easy to cause problems such as catalyst coking

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