Tray assembly and extraction tower

Abstract

The invention discloses a tray assembly and an extraction tower, the tray assembly comprises a plurality of first tray plate groups and a plurality of second tray plate groups which are used for being arranged in the extraction tower, the first tray plate groups and the second tray plate groups are arranged layer by layer at intervals, each first tray plate group comprises two first plates which are arranged at intervals, and each second tray plate group comprises two second plates which are arranged at intervals; the first tray plate group comprises a first plate arranged below the first gap, the second tray plate group comprises a second plate arranged below the first gap, and through the synergistic effect of the first plate in the first tray plate group and the second plate in the second tray plate group, crude methyl methacrylate and desalted water are in full contact through countercurrent, so that the extraction separation effect is improved; the first tower tray plate group and the second tower tray plate group are integrally convenient to build, polymerization of methyl methacrylate on the tower tray can be effectively reduced on the overall structure, and the first tower tray plate group and the second tower tray plate group can be disassembled, assembled and overhauled through manholes in the extraction tower respectively, so that the structure is more reasonable, the overhauling operation is more convenient, and the working efficiency is improved. And good operation efficiency of the methyl methacrylate device is maintained.

Description

Technical Field

[0001] This application relates to the technical field of extraction towers, and particularly to a tray assembly and an extraction tower. Background Art

[0002] An extraction tower is a device used for chemical separation, usually for extracting or separating different components from a mixture. This device is often used in the chemical industry to extract solutes from liquid mixtures or separate the components of mixtures.

[0003] The methyl methacrylate (MMA) plant mainly uses the acetone cyanohydrin method to produce methyl methacrylate (MMA). The extraction tower is one of its core devices. There are multiple trays inside the extraction tower. The crude MMA and light components enter the bottom of the extraction tower after condensation. Demineralized water is added to the top of the extraction tower and flows countercurrently through the trays to extract methanol and other water-soluble substances. In the existing structure of the extraction tower, the structure of the trays is unreasonable and it is difficult to repair the trays, making it difficult to maintain the good operating efficiency of the methyl methacrylate (MMA) plant. Summary of the Invention

[0004] In view of the defects existing in the prior art, this application provides a tray assembly and an extraction tower to solve the problem that the tray arrangement in the existing extraction tower leads to unreliable operation.

[0005] The above object of this application is mainly achieved by the following technical solutions:

[0006] A tray assembly, the tray assembly includes a plurality of first tray plate groups and a plurality of second tray plate groups for being arranged in an extraction tower, and the first tray plate groups and the second tray plate groups are arranged at intervals and layer by layer,

[0007] The first tray plate group includes two first plate members arranged at intervals, the first plate members are fixedly connected to the extraction tower, and a first gap is provided between the two first plate members to form a channel for material flow at the first gap;

[0008] The second tray plate group includes a second plate member arranged below the first gap. The two ends of the first plate member are respectively fixedly connected to the extraction tower, and second gaps are respectively provided between the two sides of the second plate member and the extraction tower to form channels for material flow at the second gaps. The width of the second plate member is greater than the width of the first gap.

[0009] In an alternative embodiment, the first plate member and the second plate member respectively include a plurality of detachably connected plate units.

[0010] In an alternative embodiment, the plurality of plate units include two edge plates and an intermediate plate arranged between the two edge plates.

[0011] In an alternative embodiment, lapping sections are respectively provided on one of the intermediate plates and the two edge plates, and the lapping section on one plate unit is used to support the adjacent plate unit, so that a plurality of the plate units are at the same height.

[0012] In an alternative embodiment, a holding portion is provided on the other intermediate plate.

[0013] In an alternative embodiment, the lapping section is fixedly connected to one side of the intermediate plate and the edge plate, and is at a different height from the intermediate plate and the edge plate.

[0014] In an alternative embodiment, a hem is provided on one side of the lapping section.

[0015] In an alternative embodiment, a locking bolt and a pressing plate are provided between the plate units. The locking bolt penetrates through the plate units detachably, and the pressing plate is pressed on the adjacent plate units.

[0016] Based on the same inventive concept, the present application further provides an extraction tower, and the extraction tower includes the tray assembly as described above.

[0017] In an alternative embodiment, a plurality of support beams and a plurality of support rings are fixedly provided on the inner wall of the extraction tower, and the first plate member and the second plate member are respectively detachably fixed on the support beams and the support rings.

[0018] Compared with the prior art, the advantages of the present application are as follows:

[0019] The tray assembly in this application includes a plurality of first tray plate groups and a plurality of second tray plate groups for being arranged in an extraction tower. The first tray plate groups and the second tray plate groups are arranged at intervals and layer by layer. The first tray plate group includes two first plate members arranged at intervals. The first plate members are fixedly connected to the extraction tower, and a first gap is provided between the two first plate members to form a channel for material flow at the first gap. The second tray plate group includes a second plate member arranged below the first gap. The two ends of the first plate member are respectively fixedly connected to the extraction tower, and second gaps are respectively provided between the two sides of the second plate member and the extraction tower to form channels for material flow at the second gaps. The width of the second plate member is greater than the width of the first gap. During actual operation, through the cooperation of the first plate members in the first tray plate group and the second plate member in the second tray plate group, crude methyl methacrylate and desalted water are in full countercurrent contact, enhancing the extraction and separation effect. Moreover, the overall first tray plate group and the second tray plate group are convenient to build, and the overall structure can effectively reduce the polymerization of methyl methacrylate on the trays. In addition, the first tray plate group and the second tray plate group can be disassembled, assembled and overhauled respectively through the manholes on the extraction tower, with convenient operation, maintaining the good operation efficiency of the methyl methacrylate device with a more reasonable structure and more convenient overhaul operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is an installation schematic diagram of the tray assembly provided by the embodiment of this application;

[0022] Figure 2 It is a side view of the installation of the first tray plate group provided by the embodiment of this application;

[0023] Figure 3 It is a top view of the installation of the first tray plate group provided by the embodiment of this application;

[0024] Figure 4 It is a partial cross-sectional view taken along line A-A in the appendix provided by the embodiment of this application; Figure 3 in the appendix provided by the embodiment of this application;

[0025] Figure 5 It is a partial cross-sectional view taken along line B-B in the appendix provided by the embodiment of this application; Figure 3 in the appendix provided by the embodiment of this application;

[0026] Figure 6 It is a partial cross-sectional view taken along line C-C in the appendix provided by the embodiment of this application; Figure 3 in the appendix provided by the embodiment of this application;

[0027] Figure 7 This is the installation side view of the second tray plate group provided by the embodiment of the present application;

[0028] Figure 8 This is the installation top view of the second tray plate group provided by the embodiment of the present application;

[0029] Figure 9 This is the attachment provided by the embodiment of the present application Figure 8 Partial cross-sectional view at D-D in the figure;

[0030] In the figure: 100, the first tray plate group; 101, the first plate member; 102, the first gap; 200, the second tray plate group; 201, the second plate member; 202, the second gap; 301, the edge plate; 302, the intermediate plate; 401, the overlapping section; 402, the holding portion; 403, the flanging; 501, the locking bolt; 502, the pressing plate; 601, the support beam; 602, the support ring. Specific embodiments

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted here that the description of these embodiments is for helping to understand the present invention, but does not constitute a limitation to the present invention. The specific structural and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms and should not be construed as limited to the embodiments described herein.

[0032] Figure 1 This is the installation schematic diagram of the tray assembly provided by the embodiment of the present application, Figure 2 This is the installation side view of the first tray plate group 100 provided by the embodiment of the present application, Figure 3 This is the installation top view of the first tray plate group 100 provided by the embodiment of the present application, Figure 4 This is the attachment provided by the embodiment of the present application Figure 3 Partial cross-sectional view at A-A in the figure, Figure 5 This is the attachment provided by the embodiment of the present application Figure 3 Partial cross-sectional view at B-B in the figure, Figure 6 This is the attachment provided by the embodiment of the present application Figure 3 Partial cross-sectional view at C-C in the figure;

[0033] Figure 7 This is the installation side view of the second tray plate group 200 provided by the embodiment of the present application, Figure 8 This is the installation top view of the second tray plate group 200 provided by the embodiment of the present application, Figure 9 This is the attachment provided by the embodiment of the present application Figure 8 Partial cross-sectional view at D-D in the figure.

[0034] An extraction column is a device used for chemical separation, typically for extracting or separating different components from a mixture. This device is often used in the chemical industry to extract solutes from liquid mixtures or to separate the components of a mixture.

[0035] The working principle of an extraction column is based on the different solubilities of different substances in a specific solvent. When the mixture passes through the column, through contact with the solvent, the target components will dissolve in the solvent, thus achieving separation.

[0036] An extraction column is used to facilitate the contact between the mixture and the solvent. There are currently two main types of extraction columns. One is a plate column, which contains plates, and the liquid and gas pass through these plates to achieve separation. The other is a packed column, which is filled with various packings. The packings provide a larger surface area and increase the contact between the liquid and the gas.

[0037] Extraction columns are widely used in various industrial processes, including: the petroleum industry for separation in crude oil refining and petrochemical processes, the chemical industry for extracting specific substances from solutions, the food processing industry for extracting oils from natural raw materials, and the pharmaceutical industry for purifying drugs and biological products.

[0038] As Figure 1 、 Figure 2 and Figure 7 shown, a tray assembly, the tray assembly includes a plurality of first tray plate groups 100 and a plurality of second tray plate groups 200 for arranging inside the extraction column, and the first tray plate groups 100 and the second tray plate groups 200 are arranged at intervals and layer by layer. That is to say, along the height direction of the extraction column, one layer of the first tray plate groups 100, one layer of the second tray plate groups 200, and one layer of the first tray plate groups 100 are arranged to build the internal structure of the extraction column, and the distance between each layer of the first tray plate groups 100 and the second tray plate groups 200 is uniform and stable to maintain a stable and reliable operation effect.

[0039] The specific number of the first tray plate groups 100 and the second tray plate groups 200 can be set according to the overall parameters of the extraction column.

[0040] As Figure 1 、 Figure 2 and Figure 3 shown, the first tray plate group 100 includes two first plate members 101 arranged at intervals, the first plate members 101 are fixedly connected to the extraction column, and a first gap 102 is provided between the two first plate members 101 to form a channel for the material to flow at the first gap 102.

[0041] The edge of the first plate member 101 away from the first gap 102 is fixedly connected to the inner wall of the extraction tower, and the connection is continuous and without pores, so that the material is blocked and guided by the first plate member 101 and only passes through the first gap 102.

[0042] The second tray plate group 200 includes a second plate member 201 arranged below the first gap 102. Both ends of the first plate member 101 are fixedly connected to the extraction tower respectively, and second gaps 202 are respectively provided between both sides of the second plate member 201 and the extraction tower, so that channels for material flow are respectively formed at the second gaps 202. The width of the second plate member 201 is greater than the width of the first gap 102.

[0043] As Figure 1 、 Figure 7 and Figure 8 shown, the edge of the second plate member 201 away from the second gap 202 is fixedly connected to the inner wall of the extraction tower, and the connection is continuous and without pores, so that the material is blocked and guided by the second plate member 201 and can pass through the second gaps 202 on both sides of the second plate member 201.

[0044] The second plate member 201 is arranged below the first gap 102. On the premise of the first tray plate group 100 and the second tray plate group 200 arranged at intervals in sequence, that is, two first plate members 101 are arranged in one layer, one second plate member 201 is arranged in the next layer at intervals, two first plate members 101 are arranged in the next layer at intervals, and one second plate member 201 is continuously arranged in the next layer at intervals. And the second plate member 201 in each layer is arranged above or below the first gap 102 in the adjacent layer.

[0045] The width of the second plate member 201 is greater than the width of the first gap 102, so that after the material passes through the first gap 102, it will surely change the moving direction under the action of the second plate member 201, and after the material passes through the second gap 202, it will surely change the moving direction under the action of the first plate member 101, improving the operation effect and also improving the operation efficiency.

[0046] In an alternative embodiment, the working principle of the tray assembly in the present application is as follows: The tray assembly includes a plurality of first tray plate groups 100 and a plurality of second tray plate groups 200 arranged in the extraction tower. The first tray plate groups 100 and the second tray plate groups 200 are arranged at intervals and layer by layer. The first tray plate group 100 includes two first plate members 101 arranged at intervals. The first plate member 101 is fixedly connected to the extraction tower, and a first gap 102 is provided between the two first plate members 101 to form a channel for material flow at the first gap 102. The second tray plate group 200 includes a second plate member 201 arranged below the first gap 102. Both ends of the first plate member 101 are fixedly connected to the extraction tower, and second gaps 202 are respectively provided between both sides of the second plate member 201 and the extraction tower to form channels for material flow at the second gaps 202. The width of the second plate member 201 is greater than the width of the first gap 102. During actual operation, through the cooperative action of the first plate member 101 in the first tray plate group 100 and the second plate member 201 in the second tray plate group 200, crude methyl methacrylate and desalted water are in full contact through countercurrent, enhancing the extraction separation effect. Moreover, the overall structure of the first tray plate group 100 and the second tray plate group 200 is convenient for construction, and can effectively reduce the polymerization of methyl methacrylate on the trays. In addition, the first tray plate group 100 and the second tray plate group 200 can be disassembled and overhauled through the manholes on the extraction tower respectively, with convenient operation, maintaining the good operating efficiency of the methyl methacrylate device with a more reasonable structure and more convenient overhaul operation.

[0047] As Figure 3 、 Figure 8 shown, in an alternative embodiment, the first plate member 101 and the second plate member 201 each include a plurality of detachably connected plate units.

[0048] Specifically, each of the first plate member 101 and the second plate member 201 is provided as a plurality of detachably connected plate units, which can improve the overhaul operation efficiency of the first plate member 101 and the second plate member 201 in the extraction tower. Under the condition of the manhole, it is more convenient to carry out operations such as the construction and overhaul of the first plate member 101 and the second plate member 201, avoiding the need to completely disassemble and overhaul all the first plate members 101 and the second plate members 201, and improving the operation convenience.

[0049] As Figure 3 、 Figure 8 shown, in an alternative embodiment, the plurality of plate units include two edge plates 301 and an intermediate plate 302 disposed between the two edge plates 301.

[0050] Specifically, the first plate member 101 and the second plate member 201 are respectively provided as two edge plates 301 and two intermediate plates 302, and the two intermediate plates 302 are arranged between the two edge plates 301.

[0051] It should be noted that, due to the different specific positions of the first plate member 101 and the second plate member 201 in the extraction tower, correspondingly, the edge plates 301 at different positions have different size specifications, and the intermediate plates 302 at different positions also have different size specifications. Here, the shape specifications of the specific plate units are not distinguished.

[0052] As Figure 3 、 Figure 8 shown, the edge plate 301 in the first plate member 101 is fixedly connected to the extraction tower, and the intermediate plate 302 in the first plate member 101 is fixedly connected to both the edge plate 301 in the first plate member 101 and the extraction tower.

[0053] The edge plate 301 in the second plate member 201 is fixedly connected to the extraction tower, and the intermediate plate 302 in the second plate member 201 is fixedly connected to the edge plate 301 in the second plate member 201.

[0054] As Figure 3 、 Figure 6 、 Figure 8 and Figure 9 shown, in an alternative embodiment, lapping segments 401 are respectively provided on one of the intermediate plates 302 and the two edge plates 301. The lapping segment 401 on one plate unit is used to support the adjacent plate unit, so that a plurality of the plate units are at the same height.

[0055] For the sake of convenience of description, the two edge plates 301 and the two intermediate plates 302 are described as the first edge plate 301, the second edge plate 301, the first intermediate plate 302, and the second intermediate plate 302.

[0056] Correspondingly, the first intermediate plate 302 and the second intermediate plate 302 are arranged between the first edge plate 301 and the second edge plate 301, and a lapping segment 401 is respectively provided on the first edge plate 301, the second edge plate 301, and the second intermediate plate 302.

[0057] Among them, the lapping segments 401 on the first edge plate 301 and the second intermediate plate 302 respectively support both sides of the first intermediate plate 302, and the lapping segment 401 on the second edge plate 301 supports the side of the second intermediate plate 302 where no lapping segment 401 is provided.

[0058] Furthermore, when specifically building and arranging, the building and fixing sequence can be set in turn as: the first edge plate 301, the second edge plate 301, the second intermediate plate 302, the first intermediate plate 302, which is more convenient for implementation.

[0059] And during the specific disassembly and inspection operations, the disassembly and removal sequence can be set in turn as: the first intermediate plate 302, the second intermediate plate 302, the first edge plate 301, and the second edge plate 301, which is more convenient to implement.

[0060] As Figure 2 , Figure 3 , Figure 7 and Figure 8 shown, in an alternative embodiment, a holding portion 402 is provided on the other intermediate plate 302 to facilitate the earliest removal operation and the latest fixing operation of the intermediate plate 302 through the holding portion 402, improving convenience.

[0061] As Figure 6 , Figure 9 shown, in an alternative embodiment, the overlapping section 401 is fixedly connected to one side of the intermediate plate 302 and the edge plate 301, and is at a different height from the intermediate plate 302 and the edge plate 301. The overlapping section 401 provides an installation foundation for adjacent intermediate plates 302 or edge plates 301, and the overlapping section 401 is fixedly arranged at different heights of the intermediate plate 302 and the edge plate 301, thereby providing an avoidance of adjacent spaces, so that adjacent intermediate plates 302 and edge plates 301 can be kept at the same height as a whole, thereby improving the flatness of the first plate member 101 and the second plate member 201 as a whole and improving the operation effect.

[0062] As Figure 6 , Figure 9 shown, in an alternative embodiment, a hem 403 is provided on one side of the overlapping section 401. Since the overlapping section 401 provides an installation foundation for adjacent intermediate plates 302 and edge plates 301, the structural strength of the overlapping section 401 at this part is improved through the hem 403 provided on the overlapping section 401, and the reliability of the installation of the intermediate plate 302 and the edge plate 301 is improved, avoiding deformation during the operation.

[0063] As Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, in an alternative embodiment, a locking bolt 501 and a pressing plate 502 are provided between the plate units. The locking bolt 501 is detachably passed through the plate units, and the pressing plate 502 is pressed on the adjacent plate units.

[0064] The locking bolt 501 is detachably passed through adjacent plate units to realize the assembly and fixation of multiple plate units, and the pressing plate 502 is pressed on the adjacent plate units to improve the fixing effect of the locking bolt 501.

[0065] Based on the same inventive concept, the present application also provides an extraction column, and the extraction column includes the tray assembly as described above. Specifically, in this extraction column, except that the tray assembly and associated components adopt the technical solutions in the above embodiments, the structures, connection relationships, installation positions, etc. of other devices can all refer to the relevant disclosures in the prior art, and will not be elaborated here.

[0066] In an alternative embodiment, a plurality of support beams 601 and a plurality of support rings 602 are fixedly provided on the inner wall of the extraction column. The first plate member 101 and the second plate member 201 are respectively detachably fixed on the support beams 601 and the support rings 602. Due to the specific arrangement of the first plate member 101 and the second plate member 201, the suspended support beams 601 provided on the inner wall of the extraction column support the areas where the first plate member 101 and the second plate member 201 do not directly contact the extraction column, improving the overall layout reliability of the first plate member 101 and the second plate member 201. The support rings 602 are attached to the inner wall of the extraction column in the shape of the extraction column, providing the contact area between the first plate member 101, the second plate member 201 and the extraction column, improving the stability of connection and installation. Moreover, a plurality of detachable locking bolts 501 and pressing plates 502 can be respectively provided between the support beams 601, the support rings 602 and the first plate member 101, the second plate member 201 for fixation.

[0067] It should be understood that the terms first, second, etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance. Although the terms first, second, etc. can be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, the first unit can be called the second unit, and similarly, the second unit can be called the first unit, without departing from the scope of the exemplary embodiments of the present invention.

[0068] It should be understood that the term "and / or" herein is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" herein is a description of another association object relationship, indicating that two relationships can exist. For example, A / and B can represent: A exists alone, and A and B exist alone. In addition, the character " / " herein generally represents that the front and rear associated objects are in an "or" relationship.

[0069] It should be understood that in the description of the present invention, the orientation or positional relationship indicated by terms such as "upper", "vertical", "inner", "outer", etc. is the orientation or positional relationship in which the disclosed product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0070] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] The terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "comprises", "comprising", "includes", and / or "including" when used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not preclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or their combinations.

[0072] Specific details are provided in the following description to facilitate a complete understanding of the exemplary embodiments. However, those of ordinary skill in the art should understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and technologies may not be shown in unnecessary detail to avoid obscuring the exemplary embodiments.

[0073] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the broadest scope consistent with the principles and novel features claimed herein.

[0074] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art.

Claims

1. A tray assembly, characterized in that, The tray assembly includes a plurality of first tray plate groups and a plurality of second tray plate groups for being arranged in an extraction column, and the first tray plate groups and the second tray plate groups are arranged at intervals and layer by layer. The first tray plate group includes two first plate members arranged at intervals, the first plate members are fixedly connected to the extraction column, and a first gap is provided between the two first plate members so as to form a channel for material flow at the first gap. The second tray plate group includes a second plate member arranged below the first gap, both ends of the first plate member are fixedly connected to the extraction column, and second gaps are respectively provided between both sides of the second plate member and the extraction column so as to respectively form channels for material flow at the second gaps, and the width of the second plate member is greater than the width of the first gap.

2. The tray assembly according to claim 1, wherein: The first plate member and the second plate member respectively include a plurality of detachably connected plate units.

3. The tray assembly according to claim 2, characterized in that: The plurality of plate units include two edge plates and an intermediate plate arranged between the two edge plates.

4. The tray assembly according to claim 3, wherein: Lap joints are respectively provided on one of the intermediate plates and the two edge plates, and the lap joint on one plate unit is used to support the adjacent plate unit so that the plurality of plate units are at the same height.

5. The tray assembly according to claim 4, characterized in that: A holding part is provided on the other intermediate plate.

6. The tray assembly according to claim 4, wherein: The lap joint is fixedly connected to one side of the intermediate plate and the edge plate and is at a different height from the intermediate plate and the edge plate.

7. The tray assembly according to claim 4, characterized in that: A hem is provided on one side of the lap joint.

8. The tray assembly according to claim 2, wherein: Locking bolts and pressing plates are provided between the plate units, the locking bolts detachably penetrate through the plate units, and the pressing plates are pressed on the adjacent plate units.

9. An extraction column, characterized in that: The extraction column includes the tray assembly according to any one of claims 1-8.

10. The extraction column according to claim 9, characterized in that: A plurality of support beams and a plurality of support rings are fixedly provided on the inner wall of the extraction column, and the first plate member and the second plate member are respectively detachably fixed on the support beams and the support rings.

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