Packing supporting device

Abstract

The invention provides a filler supporting device which comprises a tube nest and a tube plug arranged at one end of the tube nest, the tube nest is filled with filler, the tube plug is provided with a channel communicated with the inside and the outside of the tube nest, and a substance with the size smaller than that of the filler can pass through the channel. And the tube plug is arranged in the tube, so that the tube plug can support and plug the filler in the tube. The invention has the beneficial effects that the tube plugs with the channels are arranged at the end parts of the tubes, so that the problems of complex arrangement of supporting fillers and inconvenience in replacement and disassembly of the fillers can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of petrochemical synthesis reaction equipment and facilities, and in particular to a filler support device suitable for a Fischer-Tropsch synthesis reactor with fillers loaded in tubes. Background Art

[0002] Chemical packing plays the role of supporting, covering, filtering and catalyst carrier in drying towers, absorption towers, cooling towers, washing towers, regeneration towers, synthesis towers, distillation towers and catalytic towers in the industries of oil refining, chemical industry, metallurgy, gas, oxygen production, chlor-alkali and environmental protection. Chemical packing is divided into random and structured packing made of ceramic, plastic and metal. Ceramic packing has excellent acid and heat resistance, and can resist corrosion from various inorganic acids, organic acids and organic solvents except hydrofluoric acid, and can be used in various high and low temperature occasions. Plastic packing has the characteristics of light weight, heat resistance and chemical corrosion resistance, large porosity, low pressure drop and mass transfer unit height, high flooding point, sufficient gas-liquid contact and high mass transfer efficiency, and can be used in the range of 60-280℃. Metal packing has the advantages of thin wall, cold and heat resistance, large porosity, large flux, low pressure drop, small resistance, good separation effect and long life. Although the one-time investment is slightly large, it can give full play to the potential of the equipment.

[0003] Fischer-Tropsch synthesis is the reaction of CO and H2 in the presence of a catalyst to produce hydrocarbons, and also includes the reaction of producing methane, alcohols and other oxygen-containing compounds, all of which are highly exothermic reactions. Fischer-Tropsch synthesis catalysts usually contain multiple components, including a main metal, a carrier or structural additive, and various other additives and additives to adjust the catalyst performance. Due to the large amount of heat released by the reaction, local overheating of the catalytic bed often occurs, resulting in reduced selectivity of hydrocarbons or oxygen-containing compounds and causing carbon deposition on the catalyst. In order to effectively remove the heat of reaction, the reactor commonly used in Fischer-Tropsch synthesis is a tubular fixed bed reactor.

[0004] In the fixed-bed Fischer-Tropsch synthesis reactor of tubular type, the catalyst is loaded in the tubular column, and the outside of the tube is boiling water. The heat released by the reaction is transferred to the boiling water outside the tube through the tube wall to produce steam as a byproduct. Since the catalyst is loaded in the tubular column, in order to effectively use and support the catalyst and facilitate the circulation and collection of synthesis gas, small-diameter ceramic balls, large-diameter ceramic balls, wire mesh, support grids and gas collectors are arranged in sequence in the lower part of the tubular column or the lower tube box. Since the catalyst has a short service life and is frequently replaced, when the catalyst is replaced, as the bottom ceramic balls are unloaded, the catalyst in the tubular column flows down under the action of gravity and falls together with the ceramic balls, which is not easy to recycle and reuse, and the catalyst in the tubular column is difficult to control separately, causing the factory to stop production for a long time. When the catalyst is extracted from the tubular column one by one by using a vacuum system, the catalyst collides and wears severely in the equipment and pipelines, which not only causes a large loss of catalyst, but also generates a large amount of waste gas to pollute the environment.

[0005] Therefore, it is necessary to study a filler support device to solve the above problems or alleviate the impact of the above problems. Summary of the invention

[0006] The present invention provides a packing support device, which solves the problems of complex arrangement of supporting packing and inconvenient disassembly and assembly for packing replacement by arranging a pipe plug with a channel at the end of a tube array.

[0007] The filler support device of the present invention may include a tube array and a tube plug arranged at one end of the tube array, the tube array is filled with filler, and the tube plug is provided with a channel connecting the inside and outside of the tube array, and the channel can pass materials smaller than the filler, so that the tube plug can support and seal the filler in the tube array.

[0008] In one embodiment, the tube plug includes a first part, a second part and a third part which are connected in sequence, the first part extends into the tube array and forms a support for the filler, the second part is spirally connected to the tube array, the third part is located outside the tube array and is used to support and rotate the tube plug, and the channel runs through the first part and the second part.

[0009] In one embodiment, the tube plug is a hollow structure formed by continuously winding a metal wire along a spiral path, the first part is conical, the second part is cylindrical, the first part and the second part are spirally wound in the same direction, and the gap between adjacent spiral turns formed by the spiral winding of the first part cooperates with the axial hollowness of the tube plug to form the channel.

[0010] In one embodiment, the third portion has a planar geometric structure, and the axes of the third portion and the second portion are in the same plane.

[0011] In one embodiment, the gaps between adjacent spiral coils of the first part and the diameter of the top coil are smaller than the particle diameter of the filler, so that the first part can support the filler.

[0012] In one embodiment, the pitch of the second portion is not less than the pitch of the first portion, and the number of helical turns of the second portion is not less than the number of helical turns of the first portion.

[0013] In one embodiment, the radial dimension of the second part is not less than the inner diameter of the tube, and the second part is cooperatively connected with the tube under pressure, which can increase the friction between the second part and the inner wall of the tube to support the filler in the tube.

[0014] In one embodiment, the support device also includes a support grid, which corresponds to the plurality of tubes and can support the plurality of tube plugs corresponding to the plurality of tubes, and the support grid includes a support tube and a plurality of support bars arranged in the support tube, wherein the plurality of support bars have the same length direction and are evenly arranged at the same spacing distance.

[0015] In one embodiment, the distance between two adjacent support bars is smaller than the inner diameter of the tube array, so that each of the tube plugs can be supported by the corresponding support bar.

[0016] In one embodiment, the axial direction of the tube array is perpendicular to the support plane of the support grid, and the central axis of the tube array passes through the middle position of two adjacent support bars corresponding thereto.

[0017] The packing support device provided by the present invention has at least the following beneficial effects compared with the prior art:

[0018] The packing support device of the present invention is provided with a pipe plug with a channel at the end of the array tube, so that the pipe plug can support and block the packing, and will not block the discharge of the reaction gas in the array tube; there is no need to provide porcelain balls, wire mesh, gas collectors, etc. of different diameters at the lower end of the array tube; and when replacing the packing, only the pipe plug needs to be disassembled to replace the packing in the array tube, and the unloaded packing will not be mixed with the porcelain balls, which makes it easy to collect and reuse the packing. Such a packing support device can not only simplify the structure of the reactor, but also facilitate the disassembly and assembly work when replacing the packing, saving time and labor, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0020] Figure 1 is a structural schematic diagram of a filler support device according to an embodiment of the present invention;

[0021] Figure 2 is a structural schematic diagram of a pipe plug according to an embodiment of the present invention;

[0022] Figure 3 yes Figure 2 A partial side view in the direction of center A;

[0023] Figure 4 yes Figure 2 A top view of

[0024] Figure 5 It is a structural schematic diagram of a support grid according to an embodiment of the present invention.

[0025] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale.

[0026] Reference numerals:

[0027] 1-tube array, 2-tube plug, 21-first part, 22-second part, 23-third part, 3-support grid, 31-support cylinder, 32-support bar, 33-centering block. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] like Figure 1 As shown, the filler supporting device of the present invention may include a tube array 1 and a tube plug 2 arranged at one end of the tube array 1, the tube array 1 is filled with fillers, and the tube plug 2 is provided with a channel connecting the inside and outside of the tube array 1, and the channel can pass materials smaller than the fillers, so that the tube plug 2 can support and seal the fillers in the tube array 1.

[0030] Specifically, the packing support device of the present invention is provided with a pipe plug 2 with a channel at the end of the array tube 1, so that the pipe plug 2 can support and block the packing, and will not block the discharge of the reaction gas in the array tube 1; there is no need to provide porcelain balls, wire mesh, gas collectors, etc. of different diameters at the lower end of the array tube 1; and when replacing the packing, only the pipe plug 2 needs to be disassembled to replace the packing in the array tube 1, and the unloaded packing will not be mixed with the porcelain balls, which is easy to collect and reuse. Such a packing support device has a simple structure and is convenient to install, fix and disassemble. At the same time, it can simplify the structure of the reactor, and is also convenient for disassembly and assembly when the packing is replaced, saving time and labor, and reducing production costs.

[0031] It should be noted that the filler may be a carrier having filtering, adsorption or catalytic functions.

[0032] like Figures 1 to 5 As shown, in one example, the pipe plug 2 includes a first part 21, a second part 22 and a third part 23 connected in sequence, the first part 21 extends into the tube array 1 and supports the filler, the second part 22 is spirally connected to the tube array 1, and the third part 23 is located outside the tube array 1 and is used to support and rotate the pipe plug 2, and the channel runs through the first part 21 and the second part 22.

[0033] Specifically, the first part 21 of the tube plug 2 is used to directly contact the filler. The first part 21 is provided with a channel opening facing the tube array 1, and the channel opening allows the reaction gas to pass through while blocking the filler from passing through. The second part 22 of the tube plug 2 is detachably connected to the tube array 1. When the second part 22 is fastened to the tube array 1, it supports the first part 21 so that the first part 21 can support and block the filler. The third part 23 of the tube plug 2 can rotate the second part 22 to facilitate the removal of the tube plug 2 from the tube array 1. At the same time, the third part 23 can also be connected to the support grid 3 to form an overall support for the tube plug 2, and further support the tube array 1.

[0034] In an example, Figures 2 to 4 As shown, the pipe plug 2 is a hollow structure formed by continuously winding a metal wire along a spiral path. The first part 21 is conical, and the second part 22 is cylindrical. The first part 21 and the second part 22 are spirally wound in the same direction. The gap between adjacent spiral turns formed by the spiral winding of the first part 21 fits the hollow of the pipe plug 2 along the axial direction to form a channel.

[0035] Specifically, the pipe plug 2 is formed by spirally winding a metal wire, which has a simple structure, a single production material, a simple manufacturing process, and a low production cost. The metal wire can be a steel wire. The first part 21 is tapered, which can increase the area of ​​the support surface in contact with the filler. At the same time, the metal wire formed by spiral winding also increases the total area of ​​the channel opening toward the tube array 1 (i.e., the total area of ​​the gaps between adjacent spiral turns), which can reduce the blocking rate of the filler to the channel opening and improve the fluidity of the reaction gas discharged smoothly from the channel.

[0036] The second part 22 is cylindrical in shape for spiral connection with the tubes 1, and the interior of the second part 22 is completely hollow in the axial direction. When the second part 22 is connected to the tubes 1, the inner wall of the tubes 1 may be provided with an internal thread that matches the spiral of the second part 22, and the metal wire in the second part 22 is embedded in the internal thread of the tubes 1. Of course, the tubes 1 may not be provided with internal threads, and the second part 22 axially enters the tubes 1 through spiral rotation by relying on its own elasticity, and the tubes 1 form radial extrusion on the second part 22, so as to achieve the spiral matching connection between the second part 22 and the tubes 1.

[0037] It should be noted that the bottom spiral of the first part 21 is the top spiral of the second part 22, and the spiral winding directions of the first part 21 and the second part 22 can be consistent right-handed or consistent left-handed.

[0038] In one example, the third portion 23 has a planar geometric structure, and the axes of the third portion 23 and the second portion 22 are in the same plane.

[0039] Specifically, the third part 23 is formed by a metal wire and arranged downward along the axis in the plane where the axis of the second part 22 is located. The third part 23 can be annular, and its axis is perpendicular to the axis of the second part 22, so that when the pipe plug 2 is disassembled, the operator can hold the third part 23 and rotate it to screw in or out the pipe plug 2. The third part 23 can also be other geometric shapes, such as rectangle, trapezoid, etc.

[0040] In one example, the gaps between adjacent spiral turns of the first part 21 and the diameter of its top turn are smaller than the particle diameter of the filler, so that the first part 21 can support the filler. The gaps between adjacent spiral turns of the first part 21 and its top turn are both the channel openings facing the tube array 1, so that the channel openings can block the filler and allow the reaction gas to pass. Figure 2 As shown, the gap between adjacent spiral coils of the first part 21 is S, the top coil diameter of the first part 21 is D1, and both S and D1 are smaller than the particle diameter of the filler.

[0041] In one example, the pitch of the second portion 22 is not less than the pitch of the first portion 21 , and the number of helical turns of the second portion 22 is not less than the number of helical turns of the first portion 21 .

[0042] Specifically, Figure 2 As shown, the pitch of the first part 21 is P1, and the pitch of the second part 22 is P2, that is, P2≥P1; the number of spiral turns of the first part 21 is N1, and the number of spiral turns of the second part 22 is N2, that is, N2≥N1. Generally, N1=3-5, N2=4-6.

[0043] In one example, the radial dimension of the second part 22 is not less than the inner diameter of the tube 1 , and the second part 22 is connected with the tube 1 under pressure, which can increase the friction between the second part 22 and the inner wall of the tube 1 to support the filler in the tube 1 .

[0044] Specifically, the radial dimension of the second portion 22 is greater than or equal to the inner diameter of the tube 1 , and the radial dimension of the second portion 22 is greater than the inner diameter of the tube 1 by an amount that allows the second portion 22 to be radially compressed by its own elasticity without changing its overall structural shape.

[0045] Furthermore, if Figure 1 and Figure 2 As shown, the diameter of the second portion 22 is D2, the inner diameter of the tube array 1 is d, and the outer diameter of the tube array 1 is D, that is, D>D2≥d.

[0046] In an example, Figure 1 and Figure 5As shown, the support device also includes a support grid 3, which corresponds to the multiple tubes 1 and can support the multiple tube plugs 2 corresponding to the multiple tubes 1. The support grid 3 includes a support tube 31 and a plurality of support bars 32 arranged in the support tube 31. The length directions of the multiple support bars 32 are consistent and are evenly arranged at the same spacing distance.

[0047] Specifically, a plurality of pipe plugs 2 are evenly distributed on the support grid 3, and the support bars 32 are used to support the pipe plugs 2. The intervals between the plurality of support bars 32 serve as exhaust channels for the reaction gas, so that the support grid 3 can stably support the pipe plugs 2 and further support the array of tubes 1. At the same time, the support grid 3 will not block the reaction gas in the array of tubes 1 from being discharged outward after passing through the channel. The support grid 3 can be welded by flat steel bars, which are the support bars 32. The array of tubes 1 on the support grid 3 can be arranged in a triangular arrangement, a parallelogram arrangement, etc.

[0048] Furthermore, the support grid 3 also includes a plurality of centering blocks 33 evenly distributed along the circumference of the outer side surface of the support tube 31. The centering blocks 33 can adjust the installation posture of the support grid 3 in coordination with the reactor so that it can be horizontally installed in the reactor.

[0049] In one example, the distance between two adjacent support bars 32 is smaller than the inner diameter of the tube array 1 , so that each tube plug 2 can be supported by the corresponding support bar 32 .

[0050] Specifically, Figure 1 As shown, the distance between two adjacent support bars 32 is L, and the inner diameter of the tube array 1 is d, that is, L<d.

[0051] In one example, the axial direction of the tube array 1 is perpendicular to the support plane of the support grid 3 , and the central axis of the tube array 1 passes through the middle position of two adjacent support bars 32 corresponding thereto.

[0052] Specifically, after the second part 22 of the pipe plug 2 is screwed into the tube array 1, the connection between the third part 23 and the second part 22 is supported and connected to the support grid 3, and the annular structure of the third part 23 extends downward along the axial direction of the tube array 1 into between two adjacent support bars 32 and is in the middle position, and the plane where the annular structure is located is parallel to the support bar 32.

[0053] If necessary, Figure 1 and Figure 2 As shown, the diameter of the third portion 23 is D3, the outer diameter of the tube 1 is D, and the diameter of the second portion 22 is D2, that is, D3>D>D2.

[0054] In order to better understand the above embodiments, the working principle of the filler support device of the present invention is further described below with reference to the accompanying drawings.

[0055] When filling, the pipe plug 2 is screwed into the lower end of the tube array 1 until the second part 22 of the pipe plug 2 is completely screwed into the tube array 1, and the support grid 3 supports each pipe plug 2, and the filler is loaded from the top of the tube array 1. When unloading the filler, the support grid 3 is first disassembled, and the pipe plug 2 and the filler in the tube array 1 will not loosen or fall off, and then the pipe plug 2 is rotated and pulled out through the third part 23, and the filler in the tube array 1 flows down by gravity.

[0056] It should be noted that during installation, the pipe plug 2 is screwed into the tube array 1. If the pipe plug 2 is right-handed, it should be manually rotated clockwise during installation to screw the pipe plug 2 into the tube array 1 until the second part 22 of the pipe plug 2 is fully screwed in. During removal, it should also be manually rotated counterclockwise to pull the pipe plug 2 out of the tube array 1.

[0057] In general, the beneficial effects of the packing support device of the present invention include the following:

[0058] The packing support method designed by the present invention has a simple structure, is convenient for installation, fixing, and disassembly, and will not block the discharge of the reaction gas in the tube array 1. After the tube plug 2 is screwed into the tube array 1, the packing and the tube plug 2 in the tube array 1 will not loosen or fall off. The setting of the support grid 3 further supports the packing and the tube plug 2 in the tube array 1. The gas generated by the reaction in the tube array 1 will freely pass through the tube plug 2 and the support grid 3. There is no need to set porcelain balls, wire mesh, gas collectors, etc. of different diameters at the bottom of the equipment. When replacing the packing, it is only necessary to manually screw in or out the tube plug 2 to replace the packing in part or all of the tube array 1. The unloaded packing will not be mixed with the porcelain balls, which is easy to collect and reuse the packing.

[0059] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A packing support device, characterized in that: The supporting device includes a tube array and a tube plug arranged at one end of the tube array. The tube array is filled with fillers. The tube plug is provided with a channel connecting the inside and outside of the tube array. The channel can pass materials smaller than the fillers, so that the tube plug can support and seal the fillers in the tube array.

2. The filler support device according to claim 1, characterized in that: The pipe plug includes a first part, a second part and a third part which are connected in sequence, the first part extends into the tube array and supports the filler, the second part is spirally connected to the tube array, the third part is located outside the tube array and is used to support and rotate the pipe plug, and the channel runs through the first part and the second part.

3. The filler support device according to claim 2, characterized in that: The pipe plug is a hollow structure formed by continuously winding a metal wire along a spiral path. The first part is conical and the second part is cylindrical. The spiral winding directions of the first part and the second part are consistent. The gap between adjacent spiral turns formed by the spiral winding of the first part cooperates with the axial hollowness of the pipe plug to form the channel.

4. The filler support device according to claim 3, characterized in that: The third part has a planar geometric structure, and the axes of the third part and the second part are in the same plane.

5. The filler support device according to claim 3, characterized in that: The gaps between adjacent spiral coils of the first part and the diameter of the top coil are both smaller than the particle diameter of the filler, so that the first part can support the filler.

6. The packing support device according to claim 3, characterized in that: The pitch of the second part is not less than the pitch of the first part, and the number of helical turns of the second part is not less than the number of helical turns of the first part.

7. The packing support device according to claim 2, characterized in that: The radial dimension of the second part is not less than the inner diameter of the tube. The second part is connected with the tube under pressure, which can increase the friction between the second part and the inner wall of the tube to support the filler in the tube.

8. The packing support device according to claim 1, characterized in that: The support device also includes a support grid, which corresponds to the multiple tubes and can support the multiple tube plugs corresponding to the multiple tubes. The support grid includes a support tube and a plurality of support bars arranged in the support tube. The length directions of the multiple support bars are consistent and are evenly arranged at the same spacing distance.

9. The packing support device according to claim 8, characterized in that: The distance between two adjacent support bars is smaller than the inner diameter of the tube array, so that each tube plug can be supported by the corresponding support bar.

10. The packing support device according to claim 8, characterized in that: The axial direction of the tube array is perpendicular to the supporting plane of the supporting grid, and the central axis of the tube array passes through the middle position of two adjacent supporting bars corresponding thereto.

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