Ecological geometry self-expanding structure simulation moving bed

Abstract

The invention relates to an ecological geometry self-expanding structure simulation moving bed. A central column located on the axis of a tower body and a plurality of grid layers distributed up and down are arranged in the tower body. A space for forming an adsorption bed layer is reserved between two adjacent grid layers; the appearance of the central column is in a regular hexagonal prism shape; the grid layer is horizontally arranged; six radial grid bars which are distributed at equal angular intervals are arranged on the same grid layer; tangential grid bars are distributed between the adjacent radial grid bars; the two ends of each radial grid bar are supported on the central column and a supporting ring of the tower body respectively, the two ends of each tangential grid bar are connected with frames of the corresponding radial grid bars respectively, the tangential grid bars and the radial grid bars are spliced together to form a complete grid layer, and the radial grid bars and the tangential grid bars are all formed parts. By optimizing the distribution structure of process materials, the distribution uniformity is improved, and machining and assembling are facilitated.

Description

technical field [0001] The invention relates to an ecological geometry self-expanding structure simulating moving bed. Background technique [0002] Simulated Moving Bed (SMB, Simulated Moving Bed) technology is a new type of modern separation technology developed on the basis of moving bed. With the advantages of low operating cost, easy automatic control, easy separation of heat-sensitive and difficult-to-separate systems, it has been widely used in petrochemical, fine chemical, biomedicine and food industries in the past decade. [0003] The simulated moving bed usually adopts a vertical shell (or tower body). The shell is divided into several beds in sequence along the axial direction, and the beds are filled with corresponding adsorbents. Each bed is equipped with an independently controlled material inlet and outlet pipe. The continuous movement of the solid-phase adsorbent is simulated by the sequential switching of the liquid-phase materials entering and leaving the...

AI Technical Summary

Problems solved by technology

However, these separation methods have problems such as uneven fluid distribution and cumbersome installation and disassembly processes.

For example, the fan-shaped area has good symmetry, but due to the large difference in length and width at both ends of the fan-shaped structure, even if the logistics connection is located at the geometric center of the fan-shaped, the fluid distribution effect is still not good, which may easily lead to uneven distribution of fluid in the grille , eventually leading to inconsistencies in the adsorption degree of the lower layer of adsorbent; in addition, the fan-shaped structure itself is longer, and the structure leads to a longer residence time of the liquid in the grid block, resulting in a large pressure drop of the stream entering and leaving the grid and prone to concentration gradients , which is not conducive to the stable operation and energy saving of the entire bed

Another example is that the rectangular partition method is simple, but several support beams and secondary support beams need to be set up, and the symmetry is not good

The inconsistencies in the distances of the stream from the bed distribution header to each rectangular area will easily lead to uneven flow distribution and pressure drop of the fluid in each area, which will eventually lead to inconsistency in the adsorption degree of the lower layer of adsorbent, resulting in a lower pressure drop of the stream in and out of the grid. It is large and prone to concentration gradients, which is not conducive to the stable operation and energy saving of the entire bed; in addition, a considerable number of support beams in this structure increase the load of the adsorption tower, resulting in an increase in the processing cost of the tower; the regional specifications are not uniform, and the specifications The large quantity will increase the processing cost of the distribution device itself and increase the difficulty of installation and disassembly

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