Upflow reactor and its application

Abstract

The invention discloses an up-flow reactor and an application thereof. The up-flow reactor comprises a reactor shell, and a catalyst bed support grid and a catalyst bed are sequentially arranged in the reactor shell along the material flow direction. The lower part of the bed and / or the upper part of the catalyst bed is provided with an elastic support layer, the elastic support layer includes a plastic elastomer bed and a ceramic ball support layer, the plastic elastomer bed includes several plastic elastomer units, the plastic elastomer The elastomeric unit includes particles made of an elastic material, and there are voids between and within the plastic elastomeric units as passages through which fluid flows. The present invention also provides an application of the upflow reactor. The plastic elastomer bed in the up-flow reactor of the present invention can be deformed synchronously with the expansion and contraction of the catalyst bed, so as to prevent the bed pressure drop from increasing due to particle abrasion during the floating process of the catalyst, and to ensure that the up-flow reactor has a stable performance. Long-term stable operation.

Description

technical field [0001] The invention belongs to the field of petrochemical equipment, and relates to an upflow reactor and its application. Background technique [0002] In the field of petrochemical industry, hydrogenation process is an important technical means for processing distillate oil and secondary processed oil. Through hydrogenation, impurities such as sulfur, nitrogen, metals, colloids, and residual carbon in oil products can be effectively removed. Removal and hydrogenation of unsaturated hydrocarbons to saturated hydrocarbons. According to the type of reactor, the hydrogenation process can be divided into fixed bed hydrogenation process, suspension bed hydrogenation process and ebullated bed hydrogenation process, among which the fixed bed hydrogenation process is the most widely used. [0003] According to the feeding method of the fixed bed reactor, it can be divided into two types: upflow type, that is, bottom feed and downflow type, that is, top feed fixed ...

AI Technical Summary

Problems solved by technology

Since the catalyst particles cannot pass through the small bed support gap, these particles are likely to block the distributor or bed support, resulting in uneven distribution of fluid, especially gas, which affects the distribution of fluid in the reactor and affects the reaction process. adversely affect

At the same time, it will also be accompanied by the wear and pulverization of the catalyst particles, resulting in a large amount of catalyst dust. These dusts move upward with the reaction materials, and clogging occurs on the surface of the screen or grid, resulting in a rapid increase in the pressure drop of the bed, affecting response start cycle

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