Catalyst supporting structure

Abstract

The present invention relates to a catalyst support structure comprising: a mesh structure containing a catalyst; the screen plate is arranged on the end face of the lower tube plate; the locking piece is used for pressing the screen plate; wherein one end of the net structure is arranged in a tube hole of the lower tube plate, and the other end of the net structure is arranged along the end face of the lower tube plate; the mesh plate exposes the tube holes of the lower tube plate; the locking piece penetrates through the net plate and is connected with the end face of the lower tube plate; the density of the net structure is gradually increased in the medium flowing direction. Mutually staggered plate spaces are alternately formed on the two sides of the screen plate; the plate space on one side is communicated with a tube hole of the lower tube plate; a curled edge is formed in the position, close to the pipe hole of the lower pipe plate, of the net plate; and the plate space on the other side is communicated with the hemming position. The problems that in an existing scheme, fine particles in a catalyst accumulate near a metal net to form blockage, the flow speed of a medium is decreased, the fine particles in the catalyst flow out through the metal net, and the medium quality is affected are solved.

Description

Technical Field

[0001] The 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 grille is fixed to the lower tube plate by bolts to compress the metal mesh.

[0003] This will cause the fine particles in the catalyst to accumulate near the metal mesh to 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 the 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 to connect the end surface of the lower tube plate; the density of the mesh structure gradually increases along the flow direction of the medium; the two sides of the mesh plate alternately 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 inside 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; and 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 edge 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 mesh; 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 at a position close to the mesh structure; under the action of the thrust of the medium, 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 structure mesh, and the smaller particles in the catalyst are distributed in the second structure mesh, so that the medium and the catalyst are fully contacted and reacted 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 to prevent the hard parts from scratching the larger particles in the catalyst.

[0018] (4) Under the action of the eddy 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, thereby extending the replacement frequency of the catalyst; at the same time, the second structural net restricts the smaller particles in the catalyst in the temporary storage space, thereby preventing the backflow of the smaller particles in the catalyst; the smaller particles in the catalyst naturally enter the eddy space during the flow of the medium, and do not interfere with the flow of the medium; the smaller particles in the catalyst are recovered in the eddy space formed by the curling edge and stored in the temporary storage space, thereby avoiding 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 compressed by bolt columns alone, the mesh is compressed at the position close to the bolt columns, while the mesh is not subjected to force and deformed at the position far from the bolt columns; the bolt columns pass through the nodes; several nodes are evenly distributed on the locking bracket, and when the bolt columns are tightened, the force of the locking bracket compressing 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 Shows Figure 1 Enlarged structural diagram of point A in the middle.

[0022] Figure 3 A right view structural 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 scheme and advantages of the present invention clearer, the device proposed by 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 accompanying drawings adopt 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 accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content 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 modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, 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 Shows Figure 1 The enlarged structure diagram of A in the middle. 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] Among them, one end of the mesh structure 1 is placed in the tube hole of the lower tube plate to accommodate the catalyst with a larger size. The other end of the mesh structure 1 is arranged along the end surface of the lower tube plate to block the catalyst with a smaller size. By accommodating and blocking the catalyst, the catalyst is placed in the mesh structure 1, and the catalyst itself has a certain hardness. The catalyst plays a role in strengthening the structure of the mesh structure 1 to prevent the collapse of the mesh structure 1.

[0028] The density of the mesh structure 1 gradually increases along the flow direction of the medium. Driven by the medium, the catalyst accumulates near the mesh structure 1. Under the thrust of the medium, the smaller catalyst enters the mesh structure 1 first, and the smaller catalyst is blocked, and the larger catalyst enters the mesh structure 1 later and is accommodated. At the same time, the accumulated catalyst is separated and accommodated on the mesh structure 1, so that the catalyst can fully react with the medium.

[0029] The mesh plate 2 exposes the tube holes of the lower tube plate. The mesh plate 2 alternately forms interlaced plate spaces 21 on both sides. The position of the side plate space 21 on the mesh plate 2 corresponds to the position of the tube hole of the lower tube plate, so that the side plate space 21 is connected to the tube hole of the lower tube plate. The other side plate space 21 is located between adjacent side plate spaces 21 and is used to collect the catalyst at the position of the curling edge 22.

[0030] The mesh plate 2 forms a curling edge 22 near the tube hole position of the lower tube plate. A first through hole is formed in the side plate space 21, and the side plate space 21 is connected to the tube hole of the lower tube plate through the first through hole. The curling edge 22 is formed around the first through hole of the side plate space 21. A second through hole is formed near the curling edge 22 on the side of the side plate space 21, and the other side plate space 21 is connected to the curling edge 22 position through the second through hole.

[0031] The locking piece 3 passes through the mesh plate 2 and then passes 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 size of the lower tube plate is relatively large, the thickness of the mesh plate 2 is relatively thin, and the size of the corresponding mesh plate 2 is also relatively large. The mesh plate 2 forms a plate space 21 on both sides by stamping and welding, thereby improving the structural strength of the mesh plate 2.

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

[0034] 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.

[0035] Exemplarily, the first structural net 11 is cylindrical. Multiple groups of net spaces 13 are 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 volume of the net space 13 gradually decreases from top to bottom. The structure of the first structural net 11 is elastic, and the catalyst squeezes the first structural net 11 under the impact of the medium, so that the net space 13 expands, the catalyst falls into the net space 13, and the net space 13 shrinks to confine the catalyst in the first structural net 11. The catalyst improves the structural strength of the first structural net 11.

[0036] The second structural net 12 includes mesh layers 14 stacked in sequence. The mesh layers 14 are arranged horizontally, and adjacent mesh layers 14 are stacked up and down. The density of the mesh layers 14 gradually increases along the flow direction of the medium. Mesh holes are arranged on the mesh layer 14, and the number of mesh holes on the mesh layer 14 gradually increases from top to bottom, and the size of the mesh holes on the mesh layer 14 gradually decreases from top to bottom. The edges of the mesh holes on the mesh layer 14 form edges and corners, so that when the catalyst is placed on the mesh holes of the mesh layer 14, the medium can still pass through the mesh layer 14. Exemplarily, the mesh holes on the mesh layer 14 are in the shape of triangles, quadrilaterals or irregular shapes.

[0037] 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 size of the mesh space 13 is determined according to the size of the larger particles in the catalyst, and the size of the mesh space 13 is smaller than the size of the larger particles in the catalyst. When the mesh space 13 expands, the mesh space 13 can accommodate the larger particles in the catalyst. When the mesh space 13 shrinks, the mesh space 13 can limit the larger particles in the catalyst. The size of the mesh holes on the mesh layer 14 is determined according to the size of the smaller particles in the catalyst, so that the mesh holes on the mesh layer 14 can limit the smaller particles in the catalyst and expose the edges and corners of the mesh holes on the mesh layer 14.

[0038] A hard component 15 is disposed 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 disposed in the mesh layer 14. The mesh layer 14 wraps the mesh component 16.

[0039] The material of the mesh structure 1 is relatively soft. When the size of the mesh structure 1 is large, the first structure mesh 11 cannot be formed in the tube hole of the lower tube plate, which will cause collapse, and the mesh layer 14 is severely deformed by the mesh plate 2. Exemplarily, the hard part 15 is stainless steel or ceramic.

[0040] The structural strength of the first structural net 11 is improved by the hard member 15, and the collapse of the first structural net 11 is avoided. The hard member 15 faces the net space 13, and when the larger particles in the catalyst are placed in the net space 13, the hard member 15 resists and restricts the larger particles in the catalyst. The first structural net 11 wraps the hard member 15 to prevent the hard member 15 from scratching the larger particles in the catalyst.

[0041] Exemplarily, the mesh 16 is a stainless steel mesh. The mesh 16 is located in the middle of the mesh plates 2 stacked on each other, and the mesh 16 plays a role in strengthening the structure of the second structural mesh 12. When the mesh plate 2 presses the second structural mesh 12, it will cause a local depression of the mesh layer 14, and the density of the mesh layer 14 will change at a local position, causing the smaller particles in the catalyst to gradually accumulate at the local depression position of the mesh layer 14. By arranging the mesh 16 in the mesh layer 14, when the pressing force of the mesh plate 2 acts on the mesh layer 14, the pressing area of ​​the mesh layer 14 on the mesh layer 14 is increased, thereby avoiding the local depression of the mesh layer 14 and avoiding the accumulation of smaller particles in the catalyst.

[0042] Under the action of the medium pushing the catalyst, the catalyst forms a layered distribution in the mesh structure 1. The larger particles of the catalyst are distributed in the first structure mesh 11, and the smaller particles of the catalyst are distributed in the second structure mesh 12, so that the medium and the catalyst are fully contacted and reacted without increasing the medium pressure and 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 structure 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 respectively.

[0044] When the medium flows through the first through hole of the side plate space 21 , the medium has a faster flow velocity near the curling edge 22 , and some parts of the medium 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 net 12. Since the second structural net 12 covers the side hole 23, the second structural net 12 blocks the smaller particles in the catalyst. Under the pressure of the vortex space 24, the smaller particles in the catalyst enter the temporary storage space 211. The temporary storage space 211 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 net 12 restricts the smaller particles in the catalyst in the temporary storage space 211, preventing the backflow of the smaller particles in the catalyst.

[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 fast, the medium drives the smaller particles in the catalyst to flow quickly to the vicinity of the curling edge 22. The curling edge 22 is steeper, and the pressure in the vortex space 24 is smaller, so the smaller particles in the catalyst enter the vortex space 24. If the curling edge 22 is flatter, the smaller particles in the catalyst will hit the curling edge 22, forming a rebound and will not enter the vortex space 24.

[0048] When the medium flow rate is slow, the medium drives the smaller particles in the catalyst to flow quickly to the vicinity of the curling edge 22. The curling edge 22 is relatively gentle, and the smaller particles in the catalyst enter the vortex space 24 along the curling edge 22. If the curling edge 22 is relatively steep, the smaller particles in the catalyst in the medium will not be close to the curling edge 22, and it is difficult for them to enter the vortex space 24.

[0049] Smaller particles in the catalyst naturally enter the eddy space 24 during the flow of the medium, and do not interfere with the flow of the medium. The eddy space 24 formed by the curling edge 22 recovers smaller particles in the catalyst and stores them in the temporary storage space 211, thereby avoiding leakage of the catalyst. At the same time, the frequency of cleaning or replacing the catalyst is reduced.

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

[0051] Since the mesh plate 2 is relatively large in size, 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 far 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 plate 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 form a planar compression force, and the locking bracket 32 ​​can compress the second structural net 12 horizontally.

[0054] The pressing force of the locking member 3 on the mesh plate 2 is determined according to the medium pressure. The standard pressing force of the locking member 3 on the mesh plate 2 is set. The greater the medium pressure, the more the pressing force of the locking member 3 on the mesh plate 2 increases compared to the standard pressing force. The smaller the medium pressure, the less the pressing force of the locking member 3 on the mesh plate 2 increases compared to the standard pressing force.

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

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A catalyst support structure, characterized in that: include: A mesh structure (1) for accommodating a catalyst; A mesh plate (2) is arranged 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 connects 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.

2. The catalyst support structure according to claim 1, characterized in that The net structure (1) comprises: a first structural net (11) disposed in the tube hole of the lower tube plate and a second structural net (12) disposed along the end surface of the lower tube plate; 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) comprises sequentially stacked net layers (14); and 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: 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.

4. The catalyst support structure according to claim 3, 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 bending degree of the curling edge (22) is determined according to the medium flow rate; and the pressing force of the locking member (3) on the mesh plate (2) is determined according to the medium pressure.

5. The catalyst support structure according to claim 2, characterized in that: 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).

6. The catalyst support structure according to claim 2, characterized in that A hard component (15) is arranged 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 arranged in the mesh layer (14); and the mesh layer (14) wraps the mesh component (16).

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