Multi-stage boiling bed hydrogenation process

Abstract

The invention discloses a multi-stage boiling bed hydrogenation process. The method comprises the following steps of: mixing a hydrocarbon raw material and hydrogen, making the mixture enter a boiling bed reactor through the bottom of the boiling bed reactor; and reacting under the hydrotreatment conditions, wherein the boiling bed reactor comprises two or more than two internal circulation areas, and the internal circulation areas are provided with different operating sections. A plurality of internal circulation areas are formed in the boiling bed reactor, and different operating sections are formed, so that the whole boiling bed reactor is more flexible in operation, the properties of a reaction material flow can be reasonably matched with the performance of a catalyst, the activity of the catalyst is fully exerted, and the light oil yield and product quality are improved.

Description

technical field [0001] The invention relates to a multi-stage ebullating bed hydrogenation process, specifically a process method in which a plurality of different operating sections are formed in the same ebullating bed reactor, and hydrocarbon raw materials are hydrogenated and converted in the operating sections with different operating conditions. Background technique [0002] Ebullated bed hydrogenation is a three-phase reaction process of gas, liquid and solid. After the hydrocarbon feedstock and hydrogen are mixed, they enter the high-pressure chamber of the ebullated bed reactor from the bottom of the reactor in an upflow mode, and then flow upward along the axis of the reactor through the gas-liquid distribution plate. Enter the effective reaction zone of the ebullated bed reactor. The solid catalyst particles in the reactor bed are lifted by the upward gas-liquid flow velocity, maintaining the catalyst particles in a random boiling state. The ideal ebullated bed r...

AI Technical Summary

Problems solved by technology

The shortcoming of the present invention is: because divider is used to divide reactor into different reaction section, then need carry out effective separation of solid and gas-liquid mixture in the upper part of different reaction section, otherwise catalyst will block the channel on distribution plate, this will need to increase separation Space or additional separation equipment, thus limiting the catalyst expansion ratio, reducing the effective catalytic reaction space, increasing the difficulty of operation and wasting the effective reaction volume

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