Catalyst distillation column internals for high effective mass transfer

Abstract

The invention relates to an internal part of a high efficient mass transfer catalytic distillation tower. Wherein, the internal part 1 is composed of a porous container and a filler 5 with catalytic performance therein, the side wall and the lower bottom surface of the container are fixed, at least one longitudinal sliding bar 7 is arranged at the middle part of the lower bottom surface, the upper bottom surface can move up and down along the longitudinal sliding bar and be fixed at an arbitrary height of the sliding bar by a bolt 8, the side wall 2 of the container is not transparent, the upper bottom surface 4 and the lower bottom surface 3 of the container are wire screen plates or porous plates, the internal part is fixed on a grid-shaped support 10 by a nut 9, and the grid-shaped support is fixed on the wall 13 of the catalytic distillation tower. The height of the upper bottom surface of the internal part of the catalytic distillation tower of the invention is lower than the side wall, thereby accumulating liquid with a certain height above a catalyst; reactants are promoted to enter a catalyst bed with the help of the gravity of the liquid, thereby allowing the reactants to be fully contacted with the surface of the catalyst; products are simultaneously impelled to be moved out of the catalyst bed, thereby avoiding the excessive reaction and effectively controlling the retention time of the reactants on the surface of the catalyst.

Description

technical field [0001] The invention relates to an internal part of a catalytic distillation tower with high-efficiency mass transfer, and belongs to the technical field of chemical equipment. Background technique [0002] Catalytic distillation tower is a kind of chemical equipment with both reaction function and separation function. The internal components in the reaction zone must have the dual functions of catalysis and vapor-liquid contact mass transfer. This kind of column internals is also called catalytic distillation. The structural performance of the tower packing directly affects the efficiency of the catalytic distillation process. It is necessary to keep the vapor-liquid two-phase in the reaction zone in full contact and to make the contact time between the reactants and the solid catalyst easy to control. However, the current catalytic distillation tower packing structure is still This requirement cannot be met. [0003] Patents and literature reports on the p...

AI Technical Summary

Problems solved by technology

However, due to the large void ratio of the tower internals, there is a serious gas short circuit phenomenon. When the gas with a very low content of effective components is used as the catalytic distillation system, the reaction efficiency is very low.

[0008] A serious problem in the use of catalytic distillation column internals made by the prior art is that when the liquid flows through the catalytic distillation column internals, it is easy to form a liquid film at the mesh on its surface and seal the passageway. The pores of the catalyst, the reactants on the surface of the component encounter the resistance of the liquid film and cannot easily enter the component through the mesh to contact the catalyst, and the internal reaction products are not easy to flow out, thereby reducing the mass transfer rate between the inside and outside of the component, making the reaction It is difficult to couple with separation, which reduces the efficiency of catalytic distillation

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