Filtering structure and filtering device for multitube reactor

Abstract

The utility model relates to a kind of filtering structure and filtering device for tube reactor, filtering structure for tube reactor, including tube sheet, tube, silk seat, filter cap, replace Johnson filter screen with the filtering structure of the application, utilize the wire-wound tube of filter cap to make effective filtration area greatly promote, while reducing medium flow resistance, improve particle interception efficiency, moreover, the structural reliability of filtering structure is enhanced, can avoid the problem of mesh and support rod welding cracking, service life is extended;In addition, filtering structure adopts modularization detachable design, it is convenient to quickly dismount, maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, specifically to a filtration structure and filtration device for a tubular reactor. Background Technology

[0002] The traditional filtration system for the tubular reactor used in the cyclization of 1,4-butanediol to prepare tetrahydrofuran employs a Johnson filter structure. The Johnson filter is located on the outside of the tube sheet and then fixed with stiffeners. This system suffers from the following technical bottlenecks: ① The filtration performance is limited, with low porosity and pore size uniformity. Johnson filters have a relatively small effective filtration area, which increases resistance when media passes through, affecting filtration efficiency. Furthermore, their pore size uniformity is poor, often resulting in inconsistent mesh sizes. This makes them unable to effectively intercept fine particles, reducing filtration accuracy and potentially causing some particles to become trapped in the mesh, increasing the risk of clogging.

[0003] ② Insufficient structural strength adaptability The core structure of Johnson's filter screen is a welded combination of "V-shaped trapezoidal wires + longitudinal support rods". Its strength mainly depends on the support of the longitudinal support rods. It is prone to cracking at the weld between the wires and the support rods due to internal pressure loads (such as media pressure, equipment deformation), which in turn causes mesh deformation and filtration failure.

[0004] Therefore, the structure of existing filtration devices for tubular reactors needs to be improved. Utility Model Content

[0005] This invention provides a filter structure for a tubular reactor. Through optimized structural design, it can significantly improve the effective filtration area and particle interception efficiency of the filtration system, enhance structural reliability, extend service life, and allow for quick disassembly and assembly, thus reducing maintenance costs.

[0006] This utility model provides a filter structure for a tube-and-shell reactor. The filter structure includes a tube sheet, tubes, a wire seat, and a filter cap. The tubes are disposed in the tube sheet, the wire seat is disposed at the connection between the tubes and the tube sheet, and the filter cap includes a cap body and a wire-wound tube connected to the cap body. The cap body has a first through hole that allows fluid to pass through. The filter cap is threadedly connected to the wire seat, and the wire-wound tube is disposed in the tubes.

[0007] The filter structure proposed in this application replaces the Johnson filter screen, and the effective filtration area is greatly increased by utilizing the wire-wound tube of the filter cap. This reduces the flow resistance of the medium while improving the particle interception efficiency. Moreover, the structural reliability of the filter structure is enhanced, avoiding the problem of cracking during welding between the wire and the support rod, and extending the service life. In addition, the filter structure adopts a modular and detachable design, which facilitates quick assembly and disassembly and reduces maintenance costs.

[0008] Furthermore, the tube sheet includes two pieces, which are arranged opposite to each other, and the tubes are arranged between the two tube sheets; the filter cap includes an upper filter cap and a lower filter cap; the filtration structure also includes a plug, which has a second through hole that allows fluid to pass through, the plug is threadedly connected to the plug seat, and the plug is located on the lower side of the lower filter cap and / or the upper side of the upper filter cap.

[0009] By installing upper and lower filter caps at the two tube sheets respectively, the filtration efficiency and effect on both sides can be guaranteed. Under long-term vibration conditions during equipment operation, there is a risk of filter caps loosening and failing, which may lead to leakage of process media or failure of filtration function. Therefore, a plug is installed in the filter structure. During installation, applying a pre-tightening force to the plug can stably fix the filter cap in the filter structure. Through the double fixing structure of the plug and the plug, the filter cap can be stably fixed in the filter structure, preventing the filter cap from falling off and affecting the filtration process.

[0010] Furthermore, the cross-section of the first through hole is a regular hexagon, and the cross-section of the second through hole is a regular hexagon.

[0011] By making the cross-section of the first through hole and the cross-section of the second through hole regular hexagonal, the filter cap and plug can be installed, fixed or removed directly using a wrench of the corresponding specification, making installation and disassembly convenient.

[0012] Furthermore, the plug includes a plug body and a clamping part. The plug body is threadedly connected to the plug seat, and the clamping part has a regular hexagonal cross-section. The cross-section of the second through hole is either regular hexagonal or circular.

[0013] By setting a clamping part with a regular hexagonal cross-section on the plug, the plug can be installed, fixed or removed by using a wrench of the appropriate size, making installation and disassembly convenient.

[0014] Furthermore, the winding tube includes a Johnson screen tube and a closing plate disposed at the end of the Johnson screen tube.

[0015] In the above technical solution, the fluid is filtered using the Johnson screen section of the wire-wound tube.

[0016] Furthermore, the winding tube includes a Johnson screen tube and a Johnson screen plate disposed at the end of the Johnson screen tube.

[0017] In the above technical solution, the Johnson screen tube and Johnson screen plate with wire-wound tube are used to filter the fluid, which further increases the filtration area.

[0018] Furthermore, the Johnson sieve tube includes several parallel support rods and spirally wound wires evenly distributed around the support rods.

[0019] The support rods provide support for the winding wires, while the evenly distributed filter gaps formed between the winding wires provide a filtering effect.

[0020] Furthermore, the cross-section of the winding wire is trapezoidal, the base of the trapezoid is 1.4-1.6 mm long, and the gap between the winding wires is 0.16-0.2 mm.

[0021] If the wire is too thin, the filter cap structure will be weaker, potentially leading to mechanical deformation or breakage. If the wire is too wide, the effective filtration area will be reduced, affecting fluid treatment efficiency. Controlling the wire winding structure parameters between 1.4-1.6 mm ensures both strength and filtration efficiency. Furthermore, if the wire gap is too small, the system pressure drop will increase significantly, exacerbating the risk of catalyst particle accumulation and clogging at the filter cap. If the wire gap is too large, the amount of catalyst lost with the fluid will increase, leading to decreased catalyst utilization and increased operating costs. Therefore, the wire gap should be controlled between 0.16-0.2 mm.

[0022] Furthermore, the cross-section of the winding wire is triangular, the base of the triangle is 1.4-1.6mm long, and the gap between the winding wires is 0.16-0.2mm.

[0023] If the wire is too thin, the filter cap structure will be weaker, potentially leading to mechanical deformation or breakage. If the wire is too wide, the effective filtration area will be reduced, affecting fluid treatment efficiency. Controlling the wire winding structure parameters between 1.4-1.6 mm ensures both strength and filtration efficiency. Furthermore, if the wire gap is too small, the system pressure drop will increase significantly, exacerbating the risk of catalyst particle accumulation and clogging at the filter cap. If the wire gap is too large, the amount of catalyst lost with the fluid will increase, leading to decreased catalyst utilization and increased operating costs. Therefore, the wire gap should be controlled between 0.16-0.2 mm.

[0024] On the other hand, the present invention provides a filtration device, characterized in that the filtration device includes the above-mentioned filtration structure for a tubular reactor.

[0025] The filtration device of this invention, due to the inclusion of the aforementioned filtration structure for tubular reactors, has high particle interception efficiency, strong structural reliability, long service life, and can be quickly disassembled and assembled, thus reducing maintenance costs.

[0026] The beneficial effects of this utility model are as follows: The filter structure for the tubular reactor of this utility model uses the filter structure of this application to replace the Johnson filter screen. The effective filtration area is greatly increased by using the wire-wound tube of the filter cap. While reducing the resistance of media flow, it improves the particle interception efficiency. Moreover, the structural reliability of the filter structure is enhanced, which can avoid the problem of cracking when welding the wire and the support rod, and extend the service life. In addition, the filter structure adopts a modular and detachable design, which is convenient for quick disassembly and assembly and reduces maintenance costs. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a partial cross-sectional schematic diagram of the filter structure for the tubular reactor of this utility model.

[0029] Figure 2 This is a partial cross-sectional schematic diagram of the upper filter cap in the filter structure for the tubular reactor of this utility model.

[0030] Figure 3 This is a cross-sectional schematic diagram of the wire plug in the filter structure for the tubular reactor of this utility model.

[0031] The components include: tube sheet 1, tube column 2, wire seat 3, upper filter cap 4', lower filter cap 4'', cap body 41, wire winding tube 42, Johnson screen tube 421, sealing plate 422, Johnson screen plate 422', first through hole 43, wire plug 5, wire plug body 51, clamping part 52, and second through hole 53. Detailed Implementation

[0032] To facilitate understanding of this invention, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the invention. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0033] Please refer to Figure 1-3 This utility model discloses a filter structure for a tube-and-tube reactor. The filter structure includes a tube sheet 1, tubes 2, a wire seat 3, and a filter cap. The tubes 2 are disposed in the tube sheet 1, the wire seat 3 is disposed at the connection between the tubes 2 and the tube sheet 1, and the filter cap includes a cap body 41 and a wire-wound tube 42 connected to the cap body 41. The cap body 41 has a first through hole 43 that allows fluid to pass through. The filter cap is threadedly connected to the wire seat 3, and the wire-wound tube 42 is disposed in the tubes 2.

[0034] The tube sheet 1 is used to position the tubes 2. Each tube sheet 1 has multiple through holes, and each tube 2 is placed in one of the through holes. The tubes 2 contain catalyst particles. Specifically, the wire seat 3 can be made of high-strength nickel-based alloy, but is not limited to this. It is understood that the wire seat 3 is fixedly connected to the tube sheet 1 (e.g., by welding). In addition, the outer wall of the filter cap has external threads, and the inner wall of the wire seat 3 has internal threads. The filter cap can be installed and fixed in the wire seat 3 and can be removed from the wire seat 3.

[0035] During normal use, the fluid to be filtered flows in through the first through hole 43 of the filter cap and flows out through the wire tube 42, thereby achieving the filtration of the fluid; when the filter cap needs to be backwashed, the flushing liquid flows in through the wire tube 42 and flows out through the first through hole 43.

[0036] The filter structure proposed in this application replaces the Johnson filter screen, and the effective filtration area is greatly increased by utilizing the wire-wound tube of the filter cap. This reduces the flow resistance of the medium while improving the particle interception efficiency. Moreover, the structural reliability of the filter structure is enhanced, avoiding the problem of cracking during welding of the wire and the support rod, and extending the service life. In addition, the filter structure adopts a modular and detachable design, which facilitates quick assembly and disassembly and reduces maintenance costs.

[0037] Furthermore, the tube sheet 1 comprises two pieces, which are arranged opposite to each other, and the tube column 2 is disposed between the two tube sheets 1; the filter cap comprises an upper filter cap 4' and a lower filter cap 4''; the filtration structure further comprises a plug 5, which has a second through hole 53 that allows fluid to pass through, the plug 5 is threadedly connected to the thread seat 3, and the plug 5 is disposed on the lower side of the lower filter cap 4'' and / or the upper side of the upper filter cap 4''.

[0038] Among them, the two tube sheets 1 are used to position the two ends of the tube 2; it can be understood that the upper filter cap 4' and the lower filter cap 4'' both include a cap body 41 and a winding tube 42. The cap body 41 is provided with a first through hole 43, but the thickness of the cap body 41 and the size or cross-sectional shape of the first through hole 43 of the two can be the same or different.

[0039] By setting upper filter caps 4' and lower filter caps 4'' at the two tube sheets 1 respectively, the filtration efficiency and effect on both sides can be guaranteed. Under long-term vibration conditions during equipment operation, the filter caps are at risk of loosening and failure, which may lead to leakage of process media or failure of filtration function. Therefore, a plug 5 is set in the filter structure. The outer surface of the plug 5 has external threads that mate with the inner wall of the thread seat 3. Specifically, the plug 5 can be made of 316L stainless steel, but is not limited to this. During installation, applying a pre-tightening force to the plug 5 can stably fix the filter cap in the filter structure. Through the double fixing structure of the thread seat 3 and the plug 5, the filter cap can be stably fixed in the filter structure, preventing the filter cap from falling off and affecting the filtration process.

[0040] Furthermore, the cross-section of the first through hole 43 is a regular hexagon, and the cross-section of the second through hole 53 is a regular hexagon.

[0041] By making the cross-section of the first through hole 43 and the second through hole 53 both regular hexagonal, the filter cap and plug 5 can be installed, fixed, or removed directly using a wrench of the corresponding specification, making installation and disassembly convenient.

[0042] In another embodiment, the plug 5 includes a plug body 51 and a clamping part 52. The plug body 51 is threadedly connected to the plug seat 3. The clamping part 52 has a cross-section of regular hexagon. The second through hole 53 has a cross-section of regular hexagon or circle.

[0043] By providing a clamping part 52 with a regular hexagonal cross-section on the plug 5, the plug 5 can be installed, fixed, or removed by using a wrench of the appropriate size, making installation and disassembly convenient.

[0044] Furthermore, the winding tube 42 includes a Johnson screen tube 421 and a closing plate 422 disposed at the end of the Johnson screen tube 421.

[0045] In the above technical solution, the fluid is filtered using the Johnson screen tube 421 portion of the wire-wound tube 42.

[0046] In another embodiment, the wire-wound tube 42 includes a Johnson screen tube 421 and a Johnson screen plate 422' disposed at the end of the Johnson screen tube 421.

[0047] In the above technical solution, the Johnson screen tube 421 and Johnson screen plate 422' of the wire tube 42 are used to filter the fluid during filtration, which further increases the filtration area.

[0048] Furthermore, the Johnson sieve tube 421 includes several parallel support rods and spirally wound wires evenly distributed around the support rods.

[0049] Figure 1-2The support rod and the winding wire are not shown. The support rod supports the winding wire, and the evenly distributed filter gaps formed between the winding wires perform the filtering function.

[0050] Furthermore, the cross-section of the winding wire is trapezoidal, the base of the trapezoid is 1.4-1.6 mm long, and the gap between the winding wires is 0.16-0.2 mm.

[0051] If the wire is too thin, the filter cap structure will be weaker, potentially leading to mechanical deformation or breakage. If the wire is too wide, the effective filtration area will be reduced, affecting fluid treatment efficiency. Controlling the wire winding structure parameters between 1.4-1.6 mm ensures both strength and filtration efficiency. Furthermore, if the wire gap is too small, the system pressure drop will increase significantly, exacerbating the risk of catalyst particle accumulation and clogging at the filter cap. If the wire gap is too large, the amount of catalyst lost with the fluid will increase, leading to decreased catalyst utilization and increased operating costs. Therefore, the wire gap should be controlled between 0.16-0.2 mm.

[0052] In another embodiment, the cross-section of the winding wire is triangular, the base of the triangle is 1.4-1.6mm long, and the gap between the winding wires is 0.16-0.2mm.

[0053] If the wire is too thin, the filter cap structure will be weaker, potentially leading to mechanical deformation or breakage. If the wire is too wide, the effective filtration area will be reduced, affecting fluid treatment efficiency. Controlling the wire winding structure parameters between 1.4-1.6 mm ensures both strength and filtration efficiency. Furthermore, if the wire gap is too small, the system pressure drop will increase significantly, exacerbating the risk of catalyst particle accumulation and clogging at the filter cap. If the wire gap is too large, the amount of catalyst lost with the fluid will increase, leading to decreased catalyst utilization and increased operating costs. Therefore, the wire gap should be controlled between 0.16-0.2 mm.

[0054] On the other hand, the present invention provides a filtration device, which includes the above-mentioned filtration structure for a tubular reactor.

[0055] The filtration device of this invention, due to the inclusion of the aforementioned filtration structure for tubular reactors, has high particle interception efficiency, strong structural reliability, long service life, and can be quickly disassembled and assembled, thus reducing maintenance costs.

[0056] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0057] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

[0059] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A filter structure for a tubular reactor, characterized in that, The filtration structure includes a tube sheet, tubes, a wire seat, and a filter cap; the tubes are disposed in the tube sheet, the wire seat is disposed at the connection between the tubes and the tube sheet, the filter cap includes a cap body and a wire-wound tube connected to the cap body, the cap body has a first through hole that allows fluid to pass through, the filter cap is threadedly connected to the wire seat, and the wire-wound tube is disposed in the tubes.

2. The filter structure for a tubular reactor according to claim 1, characterized in that, The tube sheet includes two tube sheets arranged opposite each other, and the tubes are arranged between the two tube sheets; the filter cap includes an upper filter cap and a lower filter cap; the filtration structure also includes a plug, the plug having a second through hole that allows fluid to pass through, the plug being threadedly connected to the plug seat, and the plug being located on the lower side of the lower filter cap and / or the upper side of the upper filter cap.

3. The filter structure for a tubular reactor according to claim 2, characterized in that, The first through hole has a regular hexagonal cross-section, and the second through hole has a regular hexagonal cross-section.

4. The filter structure for a tubular reactor according to claim 2, characterized in that, The plug includes a plug body and a clamping part. The plug body is threadedly connected to the plug seat. The cross-section of the clamping part is regular hexagonal. The cross-section of the second through hole is regular hexagonal or circular.

5. The filter structure for a tubular reactor according to claim 1, characterized in that, The winding tube includes a Johnson screen tube and a closing plate located at the end of the Johnson screen tube.

6. The filter structure for a tubular reactor according to claim 1, characterized in that, The winding tube includes a Johnson screen tube and a Johnson screen plate located at the end of the Johnson screen tube.

7. The filter structure for a tubular reactor according to claim 5 or 6, characterized in that, The Johnson sieve tube includes several parallel support rods and spirally wound wires evenly distributed around the support rods.

8. The filter structure for a tubular reactor according to claim 7, characterized in that, The cross-section of the winding wire is trapezoidal, with the base of the trapezoid being 1.4-1.6 mm long and the gap between the winding wires being 0.16-0.2 mm.

9. The filter structure for a tubular reactor according to claim 7, characterized in that, The cross-section of the winding wire is triangular, with a base length of 1.4-1.6 mm and a gap of 0.16-0.2 mm.

10. A filtration device, characterized in that, The filtration device includes the filtration structure for a tubular reactor as described in any one of claims 1-9.

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