Ecological geometric self-expanding structure simulates a moving bed

Abstract

This invention relates to an ecological geometric self-expanding structure simulated moving bed. The tower body contains a central column located on the tower's axis and multiple layers of grids distributed vertically. Space is left between adjacent grid layers to form an adsorption bed. The central column is a regular hexagonal prism. The grid layers are horizontally arranged, with six radial grid strips evenly spaced on each layer. Tangential grid strips are distributed between adjacent radial grid strips. The two ends of each radial grid strip are supported by the central column and the support ring of the tower body, respectively. The two ends of each tangential grid strip are connected to the edge of the corresponding radial grid strip, forming a complete grid layer together with the radial grid strips. Both the radial and tangential grid strips are pre-formed components. This invention improves the uniformity of material distribution by optimizing the material distribution structure and facilitates processing and assembly.

Description

Technical Field

[0001] This invention relates to an ecological geometric self-expanding structure simulating a moving bed. Background Technology

[0002] Simulated Moving Bed (SMB) technology is a new type of modern separation technology developed based on moving beds. It has advantages such as strong separation capacity, small equipment structure, low adsorbent consumption, large mass transfer driving force, low investment and operating costs, easy automatic control, and easy separation of heat-sensitive and difficult-to-separate systems. In the past decade, it has been widely used in petrochemical, fine chemical, biopharmaceutical and food industries.

[0003] Simulated moving bed (SMB) typically employs a vertical shell (or tower body) with several beds sequentially divided along the axial direction. Each bed is filled with a corresponding adsorbent, and each bed has independently controlled material inlet and outlet pipes. The continuous movement of the solid adsorbent is simulated by the sequential switching of liquid phase materials entering and exiting the adsorption bed under program control. That is, the relative movement of the solid and liquid phases is achieved by continuously switching the material inlet and outlet positions in the device. This solves the problems of moving bed processes, such as the inconvenience of operation when a large amount of solid adsorbent circulates inside and outside the bed, adsorbent wear, easy clogging of pipes by powder, difficulty in uniform flow, and unsatisfactory adsorption effect. It has the advantages of a fixed bed between two switching operations, while retaining the characteristics of continuous countercurrent moving bed operation during continuous switching. From the whole process, SMB adsorption separation operation is a semi-continuous operation process. Moreover, it only simulates the movement of the stationary phase, so there is no adsorbent wear. At the same time, it can give full play to the advantages of continuous operation, large throughput, high product purity, and high recovery rate.

[0004] The main drawback of existing SMBs lies in feed distribution and discharge collection. Pipeline distributors are typically used, but they struggle to achieve ideal uniformity and can negatively impact the stability of the adsorbent bed. An improvement approach involves installing fluid (process material) distribution devices between (or above and below) the bed layers. These devices divide the entire flow surface (cross-section) into several small areas using baffles. Each small area has independent feed and discharge branches to reduce unevenness caused by an excessively large area.

[0005] Several methods can be used to divide small areas. For example, radial (along the radius of the tower cross-section) baffles can be used to divide the entire flow cross-section into several equal-sized fan-shaped areas; or longitudinal and transverse baffles can be used to divide the flow surface into several rectangular areas. However, these methods all have problems such as uneven fluid distribution and cumbersome installation and disassembly processes. For example, while the fan-shaped areas have good symmetry, the significant differences in length and width at both ends of the fan structure mean that even if the material inlet is located at the geometric center of the fan, the fluid distribution effect is still poor, easily leading to uneven fluid distribution in the grid and ultimately inconsistent adsorption levels of the lower adsorbent. In addition, the fan-shaped structure itself is relatively long, resulting in a longer residence time of the liquid in the grid blocks, leading to a larger pressure drop when the material enters and exits the grid and the potential for concentration gradients, which is detrimental to the stable operation and energy saving of the entire bed. Another example is the rectangular partitioning method, which is simple but requires several support beams and secondary support beams and has poor symmetry. The inconsistent distances from the main distribution pipe to each rectangular area in the bed structure can lead to uneven flow distribution and pressure drop across the zones, resulting in inconsistent adsorption levels of the adsorbent in the lower layers. This causes significant pressure drops at the inlet and outlet of the material through the grid and facilitates concentration gradients, which is detrimental to stable operation and energy conservation of the entire bed. Furthermore, the numerous support beams in this structure increase the load on the adsorption tower, raising the tower manufacturing cost. The inconsistent and numerous regional specifications also increase the manufacturing cost of the distribution device itself and make installation and disassembly more difficult. Summary of the Invention

[0006] To overcome the aforementioned deficiencies of the prior art, this invention provides an ecological geometric self-expanding structure simulated moving bed, aiming to optimize the fluid (process material) distribution structure, improve the uniformity of distribution, and facilitate the setting of the distribution device.

[0007] The technical solution of this invention is: an ecological geometric self-expanding structure simulated mobile bed, comprising a tower body, wherein a central column located on the tower body axis and multiple layers of grids distributed vertically are provided inside the tower body, with spaces between adjacent grid layers forming an adsorption bed layer. The adsorption bed layer is multi-layered, the central column is in the shape of a regular hexagonal prism, the grid layers are horizontally arranged and composed of several grid strips closely arranged on the same horizontal plane, each grid strip is composed of one or more grid units, including radial grid strips and tangential grid strips, each grid unit is in the shape of a regular hexagonal cylinder with a six-sided frame, when the grid strip contains multiple grid units, the grid units are arranged in a straight line, with adjacent grid units... The tower has a shared wall (connected by sharing the same frame). There are 6 radial grid strips on the same grid layer, which are distributed at equal angles. The radial grid strips are set along the radial direction of the tower body (radial direction of the tower body cross-section or horizontal straight line direction through the center point of the tower body cross-section). Their inner ends are opposite to one outer side of the central column and supported on the central column. Their outer ends are supported on the tower body. The tangential grid strips are set along the tangential direction of the tower body (horizontal direction perpendicular to the radial direction of the tower body at the center point of the tangential grid strip) and fill the area between adjacent radial grid strips. Their ends are connected to the frame of the corresponding radial grid strip and are spliced ​​together with the radial grid strips to form a complete grid layer.

[0008] Both the central column and the tower body can be provided with support structures for supporting the radial grid bars.

[0009] The support structure of the central column is preferably a horizontal outer support ring fixedly installed on its outer side, and the support structure of the tower body is preferably a horizontal inner support ring fixedly installed on its inner side. The two ends of the radial grid strip are respectively supported on the inner support ring and the outer support ring.

[0010] The inner end of the radial grid bar may or may not be provided with a fixed connection structure or fixed connection component between it and the corresponding inner support ring.

[0011] The outer end of the radial grid bar may or may not be provided with a fixed connection structure or fixed connection component between it and the corresponding outer support ring.

[0012] Both the radial and tangential grid bars are preferably integrally molded parts.

[0013] The radial grid strips, together with the central column and the tower body, form a supporting skeleton for the grid layer, and the side edges of the radial grid strips constitute the supporting members for the corresponding tangential grid strips.

[0014] On the same grid layer, the splicing method (or distribution) of the grid strips should generally be such that the adjacent side frames of adjacent grid units are opposite each other, that is, frame to frame, thereby forming a honeycomb-like tight splicing method.

[0015] The outer end of the radial grid bar is preferably provided with an overlapping structure in the shape of a half grid unit, which is used to support the support structure of the tower body and to achieve connection with the corresponding frame of the outermost tangential grid bar.

[0016] The connection between the tangential grid strip and the corresponding radial grid strip can be a slotted connection. The top of the end frame of the tangential grid strip opposite to the radial grid strip is provided with an outwardly extending slot structure with an opening facing downward. The slot structure is fastened to the corresponding frame of the radial grid strip, and its outer wall is fastened to the inner side of the corresponding frame of the radial grid strip.

[0017] The connection between the tangential grid bar and the corresponding radial grid bar can be achieved by a pre-reserved welding plate connection. The bottom of the end frame of the tangential grid bar opposite to the radial grid bar is provided with an outwardly extending horizontal pre-reserved welding plate, which is welded to the bottom of the corresponding frame of the radial grid bar.

[0018] Preferably, the radial grid strip includes three complete grid units, and three tangential grid strips are provided between any two adjacent radial grid strips, which are respectively a 1-unit grid strip composed of 1 grid unit, a 2-unit grid strip composed of 2 grid units, and a 3-unit grid strip composed of 3 grid units from the inside to the outside.

[0019] Preferably, each of the grid layers is provided with its own multi-stage distribution piping system.

[0020] Preferably, the correspondence (connection) between the upper-level distribution pipe and the lower-level distribution pipe in the multi-level distribution pipe system is one-to-many, and the number of grid units corresponding to each distribution pipe at the same level is the same.

[0021] The present invention has the following beneficial effects:

[0022] 1) The hexagonal partitioning method (grid unit) fully utilizes the characteristics of hexagons of "complete filling" and "maximum efficiency". It has the dual advantages of being able to completely fill the flow plane and having the largest area under the same perimeter. It can achieve technical effects such as compact large-diameter bed planar structure, uniform distribution, good stress buffering effect, high modularity, and good self-support effect.

[0023] 2) By using a long column with a regular hexagonal cross-section as the central support, and radiating outwards from the center in sequence, the frame of the main beam grid forming part serves as the support point for other grid forming parts. No additional crossbeams are needed, thus achieving "self-support" of the grid, effectively reducing the tower load, increasing the bed flow cross-sectional area, and simplifying the support structure.

[0024] 3) The grid partitions are uniform, and the flow path length of the fluid from the center to the edge within the grid is consistent, resulting in better distribution uniformity. This can significantly improve the separation efficiency of the simulated moving bed and is more energy-efficient and effective compared to traditional technologies.

[0025] 4) It avoids the deformation trend caused by uneven stress, so that the entire bed cross section has better stress buffer and the structure is more stable.

[0026] 5) The multi-stage liquid distribution pipe ensures that the liquid path and resistance are the same in each zone, thus guaranteeing the consistency of the flow rate in each zone.

[0027] 6) The edges of the tangential grid bars and the radial grid bars are connected by a slotted type and / or a pre-reserved welding plate type, which facilitates on-site assembly and disassembly.

[0028] 7) The grid used as a distribution device is assembled from molded parts, which has a high degree of modularity and greatly reduces the processing difficulty and cost.

[0029] This invention can be used for the separation of C5-C20 hydrocarbons, light aromatic hydrocarbons, heavy aromatic hydrocarbons, and the separation of alkanes and alkenes. Attached Figure Description

[0030] Figure 1 This is a structural diagram of a mobile bed;

[0031] Figure 2 This is a schematic diagram of the grid layer structure;

[0032] Figure 3 This is a three-dimensional structural diagram of the grid layer support structure;

[0033] Figure 4 This is a schematic diagram of the radial grid bar layering arrangement;

[0034] Figure 5 This is a plan view of the grid layer support structure.

[0035] Figure 6 This is a schematic diagram of the radial grid bar support method;

[0036] Figure 7 This is a schematic diagram of the arrangement of tangential grid bars in unit 1;

[0037] Figure 8 This is a schematic diagram of the arrangement of tangential grid bars in two units;

[0038] Figure 9 This is a schematic diagram of the arrangement of 3-unit tangential grid bars;

[0039] Figure 10 This is a top view of the distribution piping;

[0040] Figure 11yes Figure 10 Corresponding 3D schematic diagram;

[0041] Figure 12 This is a top-down view of the top-level distribution piping;

[0042] Figure 13 yes Figure 11 Corresponding 3D schematic diagram;

[0043] Figure 14 This is a top view of the bottom distribution piping;

[0044] Figure 15 yes Figure 14 Corresponding 3D schematic diagram;

[0045] Figure 16 This is a schematic diagram of a card slot connection;

[0046] Figure 17 yes Figure 16 A magnified view of a portion of the card slot;

[0047] Figure 18 This is a schematic diagram of the reserved welding plate connection;

[0048] Figure 19 yes Figure 18 The image shows a magnified view of a portion of the reserved welding plate. Detailed Implementation

[0049] This invention relates to an eco-geometrically self-expanding simulated moving bed suitable for efficient separation of liquid-solid systems. It comprises a vertical shell with several grid layers arranged alternately vertically within it. A long, hexagonal column (referred to as a central column) runs along the axis of the shell, penetrating the top and bottom of the tower. Within the grid layers, six main frames (referred to as radial grid strips) radiate naturally from the sides of the central column, extending radially to the inner wall of the adsorption tower in units of hexagonal grid units, forming an eco-geometrically expanded hexagonal star-shaped radial structure. This structure serves as the supporting framework for each grid layer. Each main frame is integrally formed outside the tower and hoisted into the tower as a whole. The spaces between the main frames are filled with hexagonal grid units of the same size as the main frames. Each row of grid units between the main frames is assembled as a molded component (referred to as a tangential grid strip) onto the supporting framework of the grid layer, forming a grid layer covering the entire cross-section of the bed. Adjacent hexagonal grid units are each equipped with their own unit material inlet and outlet pipes. Each grid layer is equipped with its own fluid distribution structure, and each fluid distribution structure is equipped with its own distribution main pipe. The distribution main pipe is connected to the unit material inlet and outlet pipes in the grid layer through one or more distribution pipe systems. There are one or more external interfaces on the same distribution main pipe. When there are multiple interfaces, each external interface is connected to its own external pipe, and each external pipe is equipped with its own valve.

[0050] See Figure 1-9 The moving bed of the present invention includes a tower body (or shell) 10, in which a plurality of grid layers 40 are vertically distributed sequentially. The space between adjacent grid layers is an adsorption bed layer 30, which is filled with a corresponding adsorbent or other materials according to adsorption needs. The grid layers are arranged horizontally and are composed of a plurality of closely distributed radial grid strips and a plurality of tangential grid strips. The grid strips include radial grid strips 42 and tangential grid strips 43, 44, and 45 (their extension direction is the tangential direction of the circumference where their middle part is located). The number of radial grid strips is a plurality, and the number of tangential grid strips is a plurality. The tower body is provided with a vertical central column 20 along the tower body axis. The radial grid strips are distributed at equal angular intervals (the included angle between any two adjacent radial grid strips is equal). The inner ends are supported on the corresponding support structure 22 on the side (outer side) of the central column, and the outer ends are supported on the corresponding support structure 12 on the inner wall of the tower body. The tangential grid strips are located between two adjacent radial grid strips and have the same included angle as the corresponding two radial grid strips. The two ends are respectively connected to the corresponding side (frame) of the radial grid strip located at the corresponding end. The grid strip is composed of or mainly composed of one or more grid units. When the grid strip has multiple grid units, the grid units are arranged in a straight line and connected by sharing a frame, that is, any adjacent grid units on the same grid strip share a wall.

[0051] The grid unit is in the shape of a regular hexagonal cylinder (the outer shape is a regular hexagonal prism cylinder).

[0052] The grid strip is preferably a one-piece molded part, which can be made of thermoplastic material by injection molding, or other suitable materials and suitable manufacturing processes can be used.

[0053] The main body of the central column is a regular hexagonal prism with a regular hexagonal cross-section, and its outer diameter (outer contour dimension) should generally be the same as the outer diameter (outer contour dimension) of the grid unit.

[0054] The number of radial grid bars is six, with their inner ends facing the corresponding side of the central column, along a radial direction perpendicular to that side (the radial direction of the tower body).

[0055] According to installation requirements, the outer end of the radial grid strip can be set as half a grid unit (or 0.5 grid unit). The so-called 0.5 grid unit is equivalent to the part after a grid unit is cut along two opposite edges, and an end panel (a vertical panel connecting the two cut edges) can be set at the cut end. The 0.5 grid unit is used to be placed on the support structure of the tower. At the same time, the side frame (the side connected with the tangential grid strip) is connected to the side frame of the adjacent grid unit in a folded plate shape, which is the same shape as the side frame of the two complete grid units, so as to fit with the end of the corresponding tangential grid strip.

[0056] Between any two adjacent radial grid strips, N tangential grid strips are arranged sequentially from the inside to the outside. The nth tangential grid strip contains n grid units and can be called an n-unit grid strip, where n = 1, 2, 3, ..., N. Correspondingly, the radial grid strip contains N+0.5 grid units. The end face border of the nth tangential grid strip (composed of the two borders of the grid unit located at the end) is adjacent to the borders of the corresponding sides of the nth and (n+1)th grid units of the corresponding radial grid strip (when n = 1, 2, 3, ..., n-1) or the borders of the corresponding sides of the nth and (n+0.5)th grid units (when n = N).

[0057] For example, between any two adjacent radial grid strips, from the inside out, the first tangential grid strip 43 contains only one grid unit and can be called a 1-unit grid strip, the second grid strip 44 contains two grid units and can be called a 2-unit grid strip, the third grid strip 45 contains three grid units and can be called a 3-unit grid strip, and so on.

[0058] A preferred embodiment is N=3. That is, the radial grid bar contains 3 grid units (complete grid units), and the number of tangential grid bars from the inside to the outside in the same radial direction is 3. This structure can meet the requirement of uniform material distribution while avoiding excessive complexity of the equipment structure (including the inlet liquid pipeline system), and can obtain a process material distribution system with completely identical resistance to each grid unit.

[0059] For a single grid bar, since it is a grid unit with a rotationally symmetrical structure, any suitable direction can be selected as its extension direction. When the two ends in the tangential direction are provided with connecting structures (e.g., slots or reserved welding plates), its extension direction can be determined according to the set connecting structures.

[0060] Normally, the corresponding edges of the grid strips on the same grid layer should be adjacent to each other. However, due to the convenience of assembly and the limitation of processing accuracy, a gap of 10mm can be left between adjacent grid strips for assembly purposes.

[0061] Based on the above configuration, a honeycomb-like grid layer is formed, and except for the outermost tangential grid strips which are not tightly fitted to the inner wall of the tower, the honeycomb structure covers the entire flow area (tower cross-section).

[0062] The tower body can be constructed using existing technology, and its top and bottom can be provided with curved upper end cap 18 and lower end cap 17.

[0063] See Figure 16-17The top of the end plate of the tangential grid bar is provided with an outwardly extending, downward-facing slot structure 46. The construction (including size) of the slot structure should ensure that after assembly, the outer wall 48 of the slot structure can be precisely engaged with the inner side of the corresponding side wall of the radial grid bar connected to it, so that the corresponding side wall of the corresponding radial grid bar is supported under the slot structure, thereby achieving the support and fixation of the tangential grid bar on the corresponding radial grid bar. Since the grid unit adopts a regular hexagonal cylindrical shape, its end plate is folded, and the corresponding slot structure is also folded, which is a slot structure of equal width with corresponding bends. The corresponding connection part of the corresponding side wall of the radial grid bar is also similarly folded, so the engagement will not slip in any planar direction.

[0064] Typically, the number of bed layers can be 8-17, which are densely packed with adsorbent; correspondingly, the number of grid layers is 9-18.

[0065] Typically, the bed diameter can be 6-14m.

[0066] Typically, the height of a grille unit can range from 100 to 350 mm. See also Figure 18-19 The bottom of the end plate of the tangential grid bar is provided with an outwardly extending planar welding plate 49. The structure (including size) of the planar welding plate should ensure that after assembly, the planar welding plate can extend exactly to the lower edge of the corresponding frame of the radial grid bar to which it is connected. It should be located in a position suitable for mutual welding and be welded to the corresponding radial grid bar by continuous welding (e.g., fillet welding) or discontinuous welding to achieve a fixed connection between the two.

[0067] Depending on actual needs, a top slot structure and a bottom flat welding plate can be set at the ends of the tangential grid strips, or only a top slot structure or a bottom flat welding plate can be set.

[0068] The central column can usually be hollow, that is, cylindrical (or tubular), in which case it can also be called a central cylinder.

[0069] Both the side support structure of the central column and the inner wall support structure of the tower body can be support rings. The side support structure of the central column is an outer support ring that is tightly fitted around the outside of the central column and fixedly connected to the central column (e.g., by welding). The inner wall support structure of the tower body is an inner support ring that is tightly attached to the inside of the tower body and fixedly connected to the tower body (e.g., by welding).

[0070] The top surface of each of the aforementioned support rings can typically be a plane.

[0071] A slot can be provided on the top surface of the support ring, and the end plate of the corresponding end of the radial grid strip connected to it can be locked in the corresponding slot, thereby limiting the planar movement of the radial grid strip.

[0072] Alternatively, an upwardly protruding locking post can be provided on the top surface of the support ring. After assembly, the locking post is inserted into the grid of the corresponding end of the radial grid strip connected to it and fits tightly against the inner side of the end plate of the corresponding end, thereby limiting the planar movement of the radial grid strip.

[0073] The ends of the radial grid bars can be fixed to the corresponding support rings with or without the installation of fixing connectors. For example, a pressure plate matching the end shape of the radial grid bar is pressed onto the corresponding end of the radial grid bar, and a fastening bolt is passed through the through hole in the pressure plate and fastened to the corresponding support ring. The head of the bolt is pressed against the corresponding pressure plate, thereby fixing the corresponding end of the radial grid bar to the support ring by means of the pressure plate.

[0074] See Figure 10-15 Multi-stage distribution pipelines can be set up to match the grid layer for feeding and discharging. The correspondence (connection) between the upper-level distribution pipe and the lower-level distribution pipe is one-to-many, that is, one upper-level distribution pipe connects to multiple lower-level distribution pipes, and one lower-level distribution pipe connects to only one upper-level distribution pipe. It can be used to adopt any suitable number of distribution pipe stages and the number of lower-level distribution pipes connected to the same distribution pipe according to the number of grid units in the same grid layer. It should be ensured that for all grid units (usually each complete grid unit, which may exclude the half grid unit at the outer end of the radial grid bar, which is mainly used to connect with the corresponding support structure), the resistance encountered by the material flow in the multi-stage distribution pipeline is the same. For example, the length, pipe diameter and shape change of each level of distribution pipe are the same, thereby ensuring that the feed (or discharge) flow rate of each grid unit is the same.

[0075] For example, for Figure 2 The grid layer shown includes a multi-stage distribution pipeline comprising a primary distribution pipe 51, a secondary distribution pipe 54, a tertiary distribution pipe 55, and a final distribution pipe 56. The primary distribution pipe connects to the process material conveying pipeline 60 and is one in number. The secondary distribution pipes number six, each corresponding to one of the six fan-shaped regions on the corresponding grid layer (a radial grid bar and its adjacent tangential grid bars on one side of the circumference constitute a fan-shaped region). One end of each secondary distribution pipe connects to the primary distribution pipe, and the other end connects to the corresponding tertiary distribution pipe. Multiple tertiary distribution pipes, such as three, are connected to the same secondary distribution pipe, each corresponding to one of the three smaller regions within the corresponding fan-shaped region. One end of each tertiary distribution pipe connects to the corresponding secondary distribution pipe, and the other end connects to the corresponding final distribution pipe. Multiple final distribution pipes, such as three, are connected to the same tertiary distribution pipe, each corresponding to one of the three grid units within the corresponding smaller region. The inlet of the final distribution pipe is located within the corresponding grid unit to enable feeding and discharging of the corresponding grid unit.

[0076] The primary distribution pipe of the multi-level distribution pipeline located in the intermediate layers (all layers except the top and bottom layers) can be a horizontal annular pipe, located near the inner wall of the tower body, or its vertical projection is located at the edge of the corresponding grid layer. The primary distribution pipes of the multi-level distribution pipeline located in the top and bottom layers can also adopt this structure.

[0077] The primary distribution pipes of the multi-level distribution pipelines located at the top and bottom layers can also be located as vertical pipes on the tower axis.

[0078] Typically, the primary distribution pipe can be located above the corresponding grid layer. However, for the multi-level distribution pipeline located at the bottom layer, when its primary distribution pipe is a vertical pipe located on the tower axis, it should be located below the corresponding grid layer to avoid conflict with the central column.

[0079] The secondary distribution pipe, tertiary distribution pipe and final distribution pipe each include two parts: a horizontal section and a vertical section, which are inverted L-shaped or L-shaped (if the primary distribution pipe is located below the corresponding grid layer). The outer end of the horizontal section of the lower distribution pipe (not connected to one end of its vertical section) is connected to the corresponding upper distribution pipe, and the outer end of the vertical section (not connected to one end of its horizontal section) is connected to each of the corresponding lower distribution pipes.

[0080] Figure 2 The described grid layer is a preferred embodiment, comprising six radial grid bars, each including three complete grid units, with a half-grid unit at the outer end for support. The number of tangential grid bars between any two adjacent radial grid bars is three: a 1-unit grid bar, a 2-unit grid bar, and a 3-unit grid bar. Therefore, the entire grid layer is divided into six equal fan-shaped regions, each containing nine complete grid units, used for feed distribution and discharge collection. For this grid layer, using the aforementioned four-stage multi-level distribution pipeline, the resistance of the material flow path corresponding to each grid unit can theoretically be at least the same. Furthermore, for a moving bed, dividing each distribution device into 54 small regions is sufficient to ensure uniformity.

[0081] A comparison of the distribution effects across the same cross-section with an 8-meter diameter is shown below:

[0082]

[0083]

[0084] This invention is a self-expanding six-membered ring structure with a short material flow path, high self-symmetry, uniform distribution, and low pressure loss.

[0085] Unless otherwise specified or further limited to one preferred or optional technical means being another, the preferred and optional technical means disclosed in this invention can be arbitrarily combined to form several different technical solutions.

Claims

1. An ecological geometric self-expanding structure simulating a moving bed, including a tower body, characterized in that... The tower body contains a central column located on the tower body axis and multiple layers of grids distributed vertically. Space is left between adjacent grid layers to form an adsorption bed. The adsorption bed is multi-layered. The central column is a regular hexagonal prism. The grid layers are horizontally arranged and consist of several grid strips closely arranged on the same horizontal plane. Each grid strip consists of one or more grid units, including radial and tangential grid strips. Each grid unit is a regular hexagonal cylinder with a six-sided border. When a grid strip contains multiple grid units, the grid units are arranged in a straight line, with adjacent grid units sharing a wall. There are six radial grid strips on the same grid layer, distributed at equal angles. The radial grid strips are arranged radially along the tower body, with their inner ends facing one outer side of the central column and supported on the central column, and their outer ends supported on the tower body. The tangential grid strips are arranged tangentially along the tower body, filling the area between adjacent radial grid strips. Their ends connect to the borders of the corresponding radial grid strips, and together with the radial grid strips, they form a complete grid layer. The central column and the... Each tower body is provided with a support structure for supporting the radial grid strips. The support structure of the central column is a horizontal outer support ring fixedly set on its outer side, and the support structure of the tower body is a horizontal inner support ring fixedly set on its inner side. The two ends of the radial grid strips are respectively supported on the inner support ring and the outer support ring. The radial grid strips and tangential grid strips are all integrally formed parts. The radial grid strips are connected together with the central column and the tower body to form the support skeleton of the grid layer. The side frame of the radial grid strips constitutes the support member of the corresponding tangential grid strip. The outer end of the radial grid strip is provided with an overlapping structure in the shape of a half grid unit, which is used to support the support structure of the tower body and realize the connection with the corresponding frame of the outermost tangential grid strip. The radial grid strip includes 3 complete grid units. There are 3 tangential grid strips between any two adjacent radial grid strips. From the inside to the outside, they are 1-unit grid strip composed of 1 grid unit, 2-unit grid strip composed of 2 grid units, and 3-unit grid strip composed of 3 grid units.

2. The ecological geometric self-expanding structure simulated mobile bed as described in claim 1, characterized in that... The inner end of the radial grid strip may or may not be fixedly connected to the corresponding inner support ring, and the outer end of the radial grid strip may or may not be fixedly connected to the corresponding outer support ring.

3. The ecological geometric self-expanding structure simulated mobile bed as described in claim 2, characterized in that... On the same grid layer, the grid strips are spliced ​​in such a way that the adjacent side frames of adjacent grid units are opposite each other.

4. The ecological geometric self-expanding structure simulated mobile bed as described in any one of claims 1-3, characterized in that... The connection between the tangential grid strip and the corresponding radial grid strip is a slotted connection. The top of the end frame of the tangential grid strip opposite to the radial grid strip is provided with an outwardly extending slot structure with an opening facing downward. The slot structure is fastened to the corresponding frame of the radial grid strip, and its outer wall is fastened to the inner side of the corresponding frame of the radial grid strip.

5. The ecological geometric self-expanding structure simulated mobile bed as described in any one of claims 1-3, characterized in that... The connection between the tangential grid bar and the corresponding radial grid bar is a reserved welding plate connection. The bottom of the end frame of the tangential grid bar opposite to the radial grid bar is provided with an outwardly extending horizontal reserved welding plate, and the reserved welding plate is welded to the bottom of the corresponding frame of the radial grid bar.

6. The ecological geometric self-expanding structure simulated mobile bed as described in any one of claims 1-3, characterized in that... Each of the grid layers is provided with its own multi-level distribution pipe system. The correspondence between the upper-level distribution pipe and the lower-level distribution pipe in the multi-level distribution pipe system is one-to-many, and the number of grid units corresponding to each distribution pipe at the same level is the same.

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