Catalyst support structure

Abstract

The present invention relates to a catalyst support structure, comprising: a mesh structure for accommodating catalysts; a mesh plate disposed on the end surface of a lower tube plate; and a locking member for pressing the mesh plate. The mesh structure has one end positioned in a tube hole of the lower tube plate, and the other end disposed along the end surface of the lower tube plate. The mesh plate exposes the tube holes of the lower tube plate. The locking member passes through the mesh plate and connects to the end surface of the lower tube plate. The density of the mesh structure gradually increases along the flow direction of the medium. The mesh plate alternately forms interlaced plate spaces on both sides. The plate spaces on one side communicate with the tube holes of the lower tube plate. The mesh plate forms a curled edge near the tube holes of the lower tube plate. The plate spaces on the other side communicate with the curled edge. This structure solves the problem in existing solutions where fine particles in the catalyst accumulate near the metal mesh, forming a blockage, causing a decrease in the flow rate of the medium and fine particles in the catalyst to flow out through the metal mesh, affecting the quality of the medium.

Description

Technical Field

[0001] The present invention relates to the field of chemical equipment, and in particular to a catalyst supporting structure. Background Art

[0002] The heat exchange tubes of the vertical shell and tube reactor are filled with granular catalysts. In order to prevent catalyst leakage, a metal mesh is installed at the lower tube plate. To ensure the structural strength of the metal mesh, the grid is fixed to the lower tube plate with bolts to compress the metal mesh.

[0003] This will cause the fine particles in the catalyst to accumulate near the metal mesh and form a blockage, causing the medium flow rate to decrease. In order to ensure the flow rate of the medium, the medium pressure needs to be increased, but this will cause the fine particles in the catalyst to flow through the metal mesh and affect the quality of the medium.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0005] In view of the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a catalyst support structure to solve the problem in the prior art that fine particles in the catalyst accumulate near the metal mesh to form a blockage, causing the medium flow rate to decrease and the fine particles in the catalyst to flow out through the metal mesh, affecting the medium quality.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] a catalyst support structure;

[0008] It includes: a mesh structure for accommodating the catalyst; a mesh plate arranged on the end surface of the lower tube plate; and a locking member for pressing the mesh plate;

[0009] Among them, one end of the mesh structure is placed in the tube hole of the lower tube plate, and the other end of the mesh structure is arranged along the end surface of the lower tube plate; the mesh plate exposes the tube hole of the lower tube plate; the locking piece passes through the mesh plate and connects to the end surface of the lower tube plate; the density of the mesh structure gradually increases along the flow direction of the medium; plate spaces are alternately formed on both sides of the mesh plate to form mutually staggered plate spaces; the plate space on one side is connected to the tube hole of the lower tube plate; the mesh plate forms a curling edge near the tube hole position of the lower tube plate; the plate space on the other side is connected to the curling edge position.

[0010] A further technical solution is that the mesh structure includes: a first structural mesh placed in the tube holes of the lower tube plate and a second structural mesh arranged along the end surface of the lower tube plate; wherein, a mesh space is formed in the first structural mesh, and the volume of the mesh space gradually decreases along the flow direction of the medium; the second structural mesh includes mesh layers stacked in sequence; the density of the mesh layers gradually increases along the flow direction of the medium.

[0011] A further technical solution is that a side hole is formed on the mesh plate near the curling position; the mesh plate squeezes the mesh structure, and the second structural mesh covers the side hole; the curling and the surface of the plate space on one side form a vortex space; the vortex space is respectively connected to the side hole and the plate space on one side.

[0012] A further technical solution is to determine the mesh space size and the mesh layer density according to the catalyst particle size; determine the curling degree according to the medium flow rate; and determine the pressing force of the locking member on the mesh plate according to the medium pressure.

[0013] A further technical solution is that the locking part includes: a bolt column and a locking bracket; wherein, the locking bracket avoids the plate space on one side; the bolt column passes through the locking bracket and the end face of the lower tube plate threadedly connected to the second structural net; the bolt column drives the locking bracket to press the mesh plate.

[0014] A further technical solution is that a hard part is arranged in the first structural net, and the hard part faces the net space; the first structural net wraps the hard part; a mesh is arranged in the net layer; and the net layer wraps the mesh.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are as follows: (1) by accommodating and blocking the catalyst, the catalyst is placed in the mesh structure, the catalyst itself has a certain hardness, and the catalyst plays a structural reinforcement role on the mesh structure to avoid the collapse of the mesh structure; the density of the mesh structure gradually increases along the flow direction of the medium; the catalyst is driven by the medium and accumulates in a position close to the mesh structure; under the action of the medium thrust, the smaller catalyst enters the mesh structure first, the smaller catalyst is blocked, and the larger catalyst enters the mesh structure later and is accommodated; at the same time, the accumulated catalyst is separated and accommodated on the mesh structure, so that the catalyst can fully react with the medium; under the action of the medium pushing the catalyst, the catalyst forms a layered distribution in the mesh structure; the larger particles in the catalyst are distributed in the first structural mesh, and the smaller particles in the catalyst are distributed in the second structural mesh, so that the medium and the catalyst can fully contact and react without increasing the medium pressure and ensuring the medium flow rate.

[0016] (2) Plate spaces are formed on both sides of the mesh plate, which improves the structural strength of the mesh plate; the mesh plate is pressed tightly by the locking parts to prevent the mesh plate from loosening.

[0017] (3) The structural strength of the first structural net is improved by the hard parts, thereby preventing the collapse of the first structural net; the hard parts face the net space, and when larger particles in the catalyst are placed in the net space, the hard parts resist and restrict the larger particles in the catalyst; the first structural net wraps the hard parts, thereby preventing the hard parts from scratching the larger particles in the catalyst.

[0018] (4) Under the action of the vortex space pressure, the smaller particles in the catalyst enter the temporary storage space; the temporary storage space completes the recovery and storage of the smaller particles in the catalyst, extending the replacement frequency of the catalyst; at the same time, the second structural network restricts the smaller particles in the catalyst in the temporary storage space, preventing the backflow of the smaller particles in the catalyst; the smaller particles in the catalyst naturally enter the vortex space during the flow of the medium and do not interfere with the flow of the medium; the vortex space formed by the curling edge recovers the smaller particles in the catalyst and stores them in the temporary storage space, avoiding the leakage of the catalyst; at the same time, the frequency of cleaning or replacing the catalyst is reduced.

[0019] (5) Due to the large size of the mesh, when the mesh is pressed by the bolt column alone, the mesh is pressed close to the bolt column, and the mesh is not deformed due to the force away from the bolt column; the bolt column passes through the node; several nodes are evenly distributed on the locking bracket. When the bolt column is tightened, the force of the locking bracket pressing the mesh is evenly distributed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a catalyst support structure according to an embodiment of the present invention is shown.

[0021] Figure 2 Shown Figure 1 Enlarged structural diagram at point A in the middle.

[0022] Figure 3 The right view structure diagram of a node according to an embodiment of the present invention is shown.

[0023] Markings in the accompanying drawings: 1. mesh structure; 11. first structural mesh; 12. second structural mesh; 13. mesh space; 14. mesh layer; 15. hard part; 16. mesh part; 2. mesh plate; 21. plate space; 211. temporary storage space; 22. curling; 23. side hole; 24. eddy current space; 3. locking part; 31. bolt column; 32. locking bracket; 33. node. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention clearer, the device proposed in the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the efficacy and purpose that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention.

[0025] Figure 1 A schematic structural diagram of a catalyst support structure according to an embodiment of the present invention is shown. Figure 2 Shown Figure 1 A magnified structural diagram of the middle A. Figure 1-Figure 2 As shown, the present invention discloses a catalyst support structure.

[0026] The catalyst support structure includes: a mesh structure 1 for accommodating the catalyst, a mesh plate 2 arranged on the end surface of the lower tube plate, and a locking member 3 for pressing the mesh plate 2.

[0027] One end of the mesh structure 1 is positioned within the tube holes of the lower tube sheet to accommodate larger catalysts. The other end of the mesh structure 1 is positioned along the end surface of the lower tube sheet to block smaller catalysts. By accommodating and blocking the catalyst, the catalyst is positioned within the mesh structure 1, which provides a certain degree of hardness. The catalyst also reinforces the mesh structure 1, preventing its collapse.

[0028] The density of mesh structure 1 gradually increases along the direction of medium flow. Driven by the medium, the catalyst accumulates near mesh structure 1. Under the thrust of the medium, smaller catalysts enter mesh structure 1 first, where they are blocked, while larger catalysts enter mesh structure 1 later and are contained. The accumulated catalyst is then separated and contained on mesh structure 1, allowing it to fully react with the medium.

[0029] The mesh plate 2 exposes the tube holes of the lower tube sheet. Alternating plate spaces 21 are formed on both sides of the mesh plate 2. The location of one side plate space 21 on the mesh plate 2 corresponds to the tube hole location of the lower tube sheet, allowing the side plate space 21 to connect to the tube holes of the lower tube sheet. The other side plate space 21, located between adjacent side plate spaces 21, is used to collect catalyst at the location of the curling edge 22.

[0030] A bead 22 is formed near the tube holes of the lower tube sheet on the mesh plate 2. A first through-hole is formed in the side plate space 21, connecting the side plate space 21 to the tube holes of the lower tube sheet through the first through-hole. The bead 22 surrounds the first through-hole in the side plate space 21. A second through-hole is formed on the side of the side plate space 21 near the bead 22, connecting the other side plate space 21 to the bead 22 through the second through-hole.

[0031] The locking piece 3 passes through the mesh plate 2 and then through the other side plate space 21 and the position of the mesh structure 1 close to the end face of the lower tube plate, and finally connects to the end face of the lower tube plate.

[0032] The lower tube plate is relatively large in size, and the thickness of the mesh plate 2 is relatively thin, so the corresponding mesh plate 2 is also relatively large in size. The mesh plate 2 is formed with plate spaces 21 on both sides by stamping and welding, thereby improving the structural strength of the mesh plate 2.

[0033] If the mesh plate 2 becomes loose, the eddy current formed at the curling edge 22 will vibrate the mesh plate 2, which may cause the catalyst in the mesh structure 1 to be vibrated out or the catalyst to accumulate in the mesh structure 1 and cause blockage, both of which will affect the reaction effect of the medium. The mesh plate 2 is compressed by the locking member 3 to prevent it from loosening.

[0034] The net structure 1 comprises: a first structural net 11 placed in the tube holes of the lower tube plate and a second structural net 12 arranged along the end surface of the lower tube plate.

[0035] Illustratively, the first structural mesh 11 is cylindrical. Multiple mesh spaces 13 are formed within the first structural mesh 11, with the volume of these spaces gradually decreasing along the flow direction of the medium. The volume of these spaces 13 decreases from top to bottom. The first structural mesh 11 is elastic. Under the impact of the medium, the catalyst compresses the first structural mesh 11, causing the mesh spaces 13 to expand and fall into them. The mesh spaces 13 then contract, confining the catalyst within the first structural mesh 11. The catalyst enhances the structural strength of the first structural mesh 11.

[0036] The second structural mesh 12 comprises stacked mesh layers 14. The mesh layers 14 are arranged horizontally, with adjacent mesh layers 14 stacked one above the other. The density of the mesh layers 14 gradually increases along the flow direction of the medium. Mesh layers 14 are arranged with mesh holes, with the number of mesh holes increasing from top to bottom and the size of the mesh holes decreasing from top to bottom. The mesh holes in mesh layers 14 have angular edges, ensuring that the medium can still pass through the mesh layers 14 when a catalyst is placed on the mesh holes. Exemplarily, the mesh holes in mesh layers 14 are triangular, quadrilateral, or irregularly shaped.

[0037] The size of mesh space 13 and the density of mesh layer 14 are determined based on the size of the catalyst particles. The size of mesh space 13 is determined based on the size of the larger catalyst particles, and is smaller than the larger catalyst particles. When mesh space 13 expands, it can accommodate the larger catalyst particles. When mesh space 13 contracts, it can confine the larger catalyst particles. The mesh size of mesh layer 14 is determined based on the size of the smaller catalyst particles, so that the mesh pores in mesh layer 14 can confine the smaller catalyst particles and expose the sharp corners of the mesh pores in mesh layer 14.

[0038] A hard component 15 is disposed within the first structural net 11, facing the net space 13. The first structural net 11 encloses the hard component 15. A mesh component 16 is disposed within the mesh layer 14. The mesh layer 14 encloses the mesh component 16.

[0039] The mesh structure 1 is made of a relatively soft material. When the mesh structure 1 is large, the first mesh 11 cannot be formed in the tube holes of the lower tube sheet, resulting in collapse. The mesh layer 14 is squeezed and deformed severely by the mesh sheet 2. Exemplarily, the hard member 15 is made of stainless steel or ceramic.

[0040] The hard member 15 increases the structural strength of the first structural mesh 11 and prevents collapse. The hard member 15 faces the mesh space 13. When larger catalyst particles are placed within the mesh space 13, the hard member 15 resists and restrains them. The first structural mesh 11 wraps around the hard member 15, preventing it from scratching the larger catalyst particles.

[0041] Illustratively, mesh 16 is a stainless steel mesh. Mesh 16 is located between the stacked mesh panels 2 and provides structural reinforcement for the second structural mesh 12. When mesh panels 2 compress the second structural mesh 12, it causes localized depressions in mesh layer 14, locally varying the density of mesh layer 14 and causing smaller catalyst particles to accumulate in these depressed locations. By placing mesh 16 within mesh layer 14, the compressive force of mesh panels 2 increases the area of ​​mesh layer 14 pressed against it, preventing localized depressions in mesh layer 14 and the accumulation of smaller catalyst particles.

[0042] As the medium pushes the catalyst, it forms a layered distribution within the mesh structure 1. Larger catalyst particles are distributed in the first mesh structure 11, while smaller catalyst particles are distributed in the second mesh structure 12. This allows the medium and catalyst to fully contact and react without increasing the medium pressure or ensuring the medium flow rate.

[0043] A side hole 23 is formed on the mesh plate 2 near the curling edge 22. The mesh plate 2 squeezes the mesh structure 1, and the second structural mesh 12 covers the side hole 23. The curling edge 22 and the surface of the side plate space 21 form an eddy current space 24. The eddy current space 24 is connected to the side hole 23 and the side plate space 21.

[0044] When the medium flows through the first through hole of the side plate space 21 , the medium has a faster flow rate near the curling edge 22 , and some positions drive smaller particles in the catalyst to flow into the vortex space 24 , and the smaller particles in the catalyst enter the side holes 23 .

[0045] A temporary storage space 211 is formed between the other side plate space 21 and the second structural mesh 12. Because the second structural mesh 12 covers the side holes 23, it blocks smaller catalyst particles. Under the pressure of the vortex space 24, the smaller catalyst particles enter the temporary storage space 211. The temporary storage space 211 recovers and stores the smaller catalyst particles, extending the frequency of catalyst replacement. Furthermore, the second structural mesh 12 restricts the smaller catalyst particles within the temporary storage space 211, preventing their backflow.

[0046] The curvature of the curling edge 22 is determined according to the flow rate of the medium. The faster the flow rate of the medium, the steeper the curvature of the curling edge 22. The slower the flow rate of the medium, the gentler the curvature of the curling edge 22.

[0047] When the medium flow rate is high, the medium drives the smaller catalyst particles to flow quickly to the vicinity of the curl 22. Since the curl 22 is relatively steep, the pressure in the vortex space 24 is relatively low, allowing the smaller catalyst particles to enter the vortex space 24. If the curl 22 is relatively flat, the smaller catalyst particles will collide with the curl 22, causing a rebound and preventing them from entering the vortex space 24.

[0048] When the medium flow rate is slow, the medium drives the smaller catalyst particles to flow quickly to the vicinity of the curling edge 22. Since the curling edge 22 is relatively flat, the smaller catalyst particles flow along the curling edge 22 and enter the vortex space 24. If the curling edge 22 is steep, the smaller catalyst particles in the medium are not located close to the curling edge 22 and thus have difficulty entering the vortex space 24.

[0049] Smaller catalyst particles naturally enter the vortex space 24 during the flow of the medium, without interfering with the flow of the medium. The vortex space 24 formed by the curling edge 22 recovers smaller catalyst particles and stores them in the temporary storage space 211, preventing catalyst leakage and reducing the frequency of catalyst cleaning or replacement.

[0050] The locking member 3 includes a bolt column 31 and a locking bracket 32. The locking bracket 32 ​​avoids the side panel space 21 and extends between adjacent side panel spaces 21. The bolt column 31 passes through the locking bracket 32, the mesh panel 2, the other side panel space 21, and the second structural mesh 12, threadedly connecting to the end surface of the lower tube sheet. Tightening the bolt column 31 drives the locking bracket 32 ​​to press against the mesh panel 2.

[0051] Since the mesh plate 2 is relatively large, when the mesh plate 2 is pressed by the bolt column 31 alone, the position of the mesh plate 2 close to the bolt column 31 is pressed, and the position of the mesh plate 2 away from the bolt column 31 is not subjected to force and deforms.

[0052] Figure 3 The right view structure diagram of the node of the embodiment of the present invention is shown. Figure 1-Figure 3 As shown, the locking member 3 further includes a plurality of nodes 33. The locking bracket 32 ​​is connected around the nodes 33. The bolt column 31 passes through the nodes 33. The plurality of nodes 33 are evenly distributed on the locking bracket 32. When the bolt column 31 is tightened, the force of the locking bracket 32 ​​pressing the mesh panel 2 is evenly distributed.

[0053] The locking bracket 32 ​​can be divided into several units. Each unit includes at least three groups of nodes 33, and the three groups of nodes 33 are not located on the same distribution line. When the bolt column 31 is tightened, the nodes 33 can generate a planar compression force, and the locking bracket 32 ​​can horizontally compress the second structural net 12.

[0054] The clamping force of the locking member 3 on the screen 2 is determined based on the medium pressure. A standard clamping force is set for the locking member 3 on the screen 2. The greater the medium pressure, the greater the increase in the clamping force of the locking member 3 on the screen 2 compared to the standard clamping force. The smaller the medium pressure, the less the increase in the clamping force of the locking member 3 on the screen 2 compared to the standard clamping force.

[0055] The greater the medium pressure, the greater the impact on the catalyst, the greater the thrust on the mesh structure 1 and mesh plate 2, and the more the clamping force of the locking member 3 on the mesh plate 2 increases. The greater the medium pressure, the smaller the impact on the catalyst, the smaller the thrust on the mesh structure 1 and mesh plate 2, and the less the clamping force of the locking member 3 on the mesh plate 2 increases.

[0056] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A catalyst support structure, characterized in that: include: A mesh structure (1) for accommodating the catalyst; A mesh plate (2) is provided on the end surface of the lower tube plate; A locking member (3) for pressing the mesh plate (2); Wherein, one end of the mesh structure (1) is placed in the tube hole of the lower tube plate, and the other end of the mesh structure (1) is arranged along the end surface of the lower tube plate; the mesh plate (2) exposes the tube hole of the lower tube plate; the locking member (3) passes through the mesh plate (2) and is connected to the end surface of the lower tube plate; the density of the mesh structure (1) gradually increases along the flow direction of the medium; the two sides of the mesh plate (2) alternately form mutually staggered plate spaces (21); the plate space (21) on one side is connected to the tube hole of the lower tube plate; the mesh plate (2) forms a curling edge (22) near the tube hole position of the lower tube plate; the plate space (21) on the other side is connected to the curling edge (22) position; The net structure (1) comprises: a first structural net (11) placed in the tube hole of the lower tube plate and a second structural net (12) arranged along the end surface of the lower tube plate; A side hole (23) is formed on the mesh plate (2) near the curling edge (22); the mesh plate (2) squeezes the mesh structure (1), and the second structural mesh (12) covers the side hole (23); the curling edge (22) and the surface of the plate space (21) on one side form an eddy current space (24); the eddy current space (24) is respectively connected to the side hole (23) and the plate space (21) on one side.

2. The catalyst support structure according to claim 1, wherein A net space (13) is formed in the first structural net (11), and the volume of the net space (13) gradually decreases along the flow direction of the medium; the second structural net (12) includes sequentially stacked net layers (14); the density of the net layers (14) gradually increases along the flow direction of the medium.

3. The catalyst support structure according to claim 2, characterized in that The size of the mesh space (13) and the density of the mesh layer (14) are determined according to the size of the catalyst particles; the degree of curvature of the curling edge (22) is determined according to the flow rate of the medium; and the pressing force of the locking member (3) on the mesh plate (2) is determined according to the pressure of the medium.

4. The catalyst support structure according to claim 2, wherein: The locking member (3) comprises: a bolt column (31) and a locking bracket (32); wherein the locking bracket (32) avoids the plate space (21) on one side; the bolt column (31) passes through the locking bracket (32) and the second structural net (12) and is threadedly connected to the end surface of the lower tube plate; the bolt column (31) drives the locking bracket (32) to press the net plate (2).

5. The catalyst support structure according to claim 2, wherein: A hard component (15) is provided in the first structural net (11), and the hard component (15) faces the net space (13); the first structural net (11) wraps the hard component (15); a mesh component (16) is provided in the mesh layer (14); and the mesh layer (14) wraps the mesh component (16).

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