Filler support device

Abstract

This invention provides a packing support device, comprising a tube and a plug disposed at one end of the tube. The tube is filled with packing material, and the plug has a channel connecting the inside and outside of the tube. The channel allows substances smaller than the packing material to pass through, enabling the plug to support and seal the packing material within the tube. The advantages of this invention include: by providing a plug with a channel at the end of the tube, the problems of complex packing support setup and inconvenient packing replacement can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of petrochemical synthesis reaction equipment, in particular to a packing support device suitable for a Fischer-Tropsch synthesis reactor filled with packing in tubes. BACKGROUND

[0002] Chemical packing in dry tower, absorption tower, cooling tower, washing tower, regeneration tower, synthesis tower, rectifying tower and catalytic tower in oil refining, chemical, metallurgical, coal gas, oxygen production, chlor-alkali, environmental protection and other industries plays a role of support, covering, filtering and catalyst carrier. Chemical packing is divided into ceramic, plastic and metal materials of loose and regular packing. Ceramic packing has excellent acid and heat resistance, can resist corrosion of 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, chemical corrosion resistance, etc., has the characteristics of large void ratio, 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 void ratio, large flux, low pressure drop, small resistance, good separation effect and long service life, although the one-time investment is slightly large, but it can fully develop the potential of the equipment.

[0003] Fischer-Tropsch synthesis is the reaction of CO and H2 to generate hydrocarbons under the action of catalyst, also including the reaction of generating methane and generating oxygen-containing compounds such as alcohol, which are all strong exothermic reactions. Fischer-Tropsch synthesis catalyst usually contains multiple components, including main metals, carriers or structure aids, and other various aids and additives to adjust the performance of the catalyst. Due to the large amount of reaction heat, local overheating of the catalytic bed often occurs, which reduces the selectivity of hydrocarbons or oxygen-containing compounds, and causes carbon deposition on the catalyst. In order to effectively remove the reaction heat, the commonly used reactor for Fischer-Tropsch synthesis is a fixed bed reactor with tubes.

[0004] The Fischer-Tropsch synthesis reactor with tubes is a fixed bed reactor with tubes, and the catalyst is filled in the tubes. The outside of the tube is boiling water, and the heat released by the reaction is transferred to the boiling water outside the tube through the tube wall to produce steam. In order to effectively use and support the catalyst, facilitate the flow and collection of synthesis gas, small-diameter ceramic balls, large-diameter ceramic balls, metal wire meshes, support grids and gas collectors are sequentially arranged in the lower part of the tube or the lower tube box. Due to the short service life of the catalyst and the frequent replacement of the catalyst, when the catalyst is replaced, the catalyst in the tube falls together with the ceramic ball pile under the action of gravity after the bottom ceramic ball is removed, which is not easy to recycle and reuse, and the catalyst in the tube is difficult to control separately, causing the plant to be out of production for a long time. When the catalyst is extracted from the tube by a vacuum system, the catalyst collides and wears seriously in the equipment and pipeline, not only causing a large amount of catalyst loss, but also producing a large amount of waste gas polluting 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

[0006] The present application provides a filler support device, which is characterized by arranging a pipe plug with a channel at the end of a column pipe to solve the problems of complex support of fillers and inconvenient disassembly and replacement of fillers.

[0007] The filler support device of the present application can include a column pipe and a pipe plug arranged at one end of the column pipe, the column pipe is filled with fillers, the pipe plug is provided with a channel communicating the inside and outside of the column pipe, and the channel can pass substances with a size smaller than the fillers, so that the pipe plug can support and block the fillers in the column pipe.

[0008] In one embodiment, the pipe plug includes a first part, a second part and a third part connected in sequence, the first part extends into the column pipe and supports the fillers, the second part is connected with the column pipe in a screwing manner, the third part is located outside the column pipe and is used for supporting and rotating the pipe plug, and the channel penetrates the first part and the second part.

[0009] In one embodiment, the pipe 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 turns of the first part formed by spiral winding matches the hollow of the pipe plug in the axial direction to form the channel.

[0010] In one embodiment, the third part has a planar geometric structure, and the third part and the second part are in the same plane along the axis.

[0011] In one embodiment, the gap between adjacent turns of the first part and the diameter of the top turn are both smaller than the particle diameter of the fillers, so that the first part can support the fillers.

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

[0013] In one embodiment, the radial dimension of the second part is not less than the inner diameter of the column pipe, and the second part is connected with the column pipe in a pressure state, which can increase the friction between the second part and the inner wall of the column pipe to support the fillers in the column pipe.

[0014] In one embodiment, the supporting device further comprises a supporting grid corresponding to the plurality of tubes and capable of supporting the plurality of tube plugs corresponding to the plurality of tubes, the supporting grid comprising a supporting cylinder and a plurality of supporting rods arranged in the supporting cylinder, the plurality of supporting rods being arranged uniformly at the same interval distance in the same length direction.

[0015] In one embodiment, the distance between the two adjacent supporting rods is less than the inner diameter of the tube, so that each tube plug can be supported by the corresponding supporting rod.

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

[0017] The supporting device for the filler provided by the present application has at least the following beneficial effects compared with the prior art:

[0018] The supporting device for the filler provided by the present application has at least the following beneficial effects compared with the prior art: BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be described in more detail below based on the embodiments and with reference to the accompanying drawings.

[0020] Figure 1 is a structural schematic view of the supporting device for the filler according to an embodiment of the present application;

[0021] Figure 2 is a structural schematic view of the tube plug according to an embodiment of the present application;

[0022] Figure 3 is Figure 2 is a partial side view in the A direction of

[0023] Figure 4 is Figure 2 is a top view of

[0024] Figure 5 is a structural schematic view of the supporting grid according to an embodiment of the present application.

[0025] In the drawings, the same components are designated by the same reference numerals. The drawings are not drawn according to the actual proportions.

[0026] Figure label:

[0027] 1-Tube, 2-Tube plug, 21-First part, 22-Second part, 23-Third part, 3-Support grid, 31-Support cylinder, 32-Support bar, 33-Self-aligning block. Detailed Implementation

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] like Figure 1 As shown, the packing support device of the present invention may include a tube 1 and a plug 2 disposed at one end of the tube 1. The tube 1 is filled with packing material, and the plug 2 is provided with a channel connecting the inside and outside of the tube 1. The channel can pass through a substance smaller than the packing material, so that the plug 2 can support and seal the packing material in the tube 1.

[0030] Specifically, the packing support device of the present invention provides a pipe plug 2 with a channel at the end of the tube 1, which supports and blocks the packing without obstructing the discharge of reaction gas from the tube 1. Furthermore, it eliminates the need for ceramic balls, wire mesh, gas collectors, etc., of different diameters at the lower end of the tube 1. When replacing the packing, only the pipe plug 2 needs to be removed to replace the packing inside the tube 1; the removed packing does not mix with the ceramic balls, facilitating its collection and reuse. This packing support device has a simple structure and is easy to install, fix, and disassemble. It also simplifies the reactor structure and facilitates disassembly and assembly during packing replacement, saving time and effort and reducing production costs.

[0031] It should be noted that the packing material can be a carrier with functions such as filtration, adsorption or catalysis.

[0032] like Figures 1 to 5 As shown, in one example, the tube 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 1 and provides support for the packing. The second part 22 is screwed into the tube 1. The third part 23 is located outside the tube 1 and is used to support and rotate the tube plug 2. The channel passes through the first part 21 and the second part 22.

[0033] Specifically, the first part 21 of the plug 2 is used to directly contact the packing material. The first part 21 has a channel opening facing into the tube 1, which allows the reactant gas to pass through while blocking the packing material. The second part 22 of the plug 2 is detachably connected to the tube 1. When the second part 22 is fastened to the tube 1, it supports the first part 21, enabling the first part 21 to support and block the packing material. The third part 23 of the plug 2 allows the second part 22 to be rotated, facilitating the removal and installation of the plug 2 from the tube 1. Simultaneously, the third part 23 can also be connected to the support grid 3 to provide overall support for the plug 2 and further support the tube 1.

[0034] In one example, such as Figures 2 to 4 As shown, the tube 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 spiral winding directions of the first part 21 and the second part 22 are the same. The gap between the adjacent spiral coils formed by the spiral winding of the first part 21 fits the tube plug 2 to form a channel along the axial hollow.

[0035] Specifically, the plug 2 is made of spirally wound metal wire, which has a simple structure, uses a single material, has a simple manufacturing process, and low production cost. The metal wire can be steel wire. The first part 21 is conical, which can increase the area of ​​the support surface in contact with the packing. At the same time, the spirally wound metal wire increases the total area of ​​the channel opening facing into the tube 1 (i.e., the total area of ​​the gap between adjacent spiral coils). This can reduce the blocking rate of the packing to the channel opening and improve the smooth flow of the reaction gas out of the channel.

[0036] The second part 22 is cylindrical and designed for a helical connection with the tube 1. The interior of the second part 22 is completely hollow axially. When the second part 22 is connected to the tube 1, the inner wall of the tube 1 may have an internal thread that engages with the helix of the second part 22, allowing the metal wire of the second part 22 to embed into the internal thread of the tube 1. Alternatively, the tube 1 may not have an internal thread; in this case, the second part 22, relying on its own elasticity, enters the tube 1 axially through helical rotation, while the tube 1 exerts radial pressure on the second part 22, thus achieving a helical connection between the second part 22 and the tube 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 either right-handed or left-handed.

[0038] In one example, the third part 23 has a planar geometry, and the axis of the third part 23 is in the same plane as the axis of the second part 22.

[0039] Specifically, the third part 23 is formed by a metal wire positioned downwards along the axis of the second part 22 in the same plane. The third part 23 can be annular, with its axis perpendicular to the axis of the second part 22, so that the operator can hold the third part 23 and rotate it to screw in or out the tube plug 2 when installing or removing it. The third part 23 can also be other geometric shapes, such as rectangles, trapezoids, etc.

[0040] In one example, the gap between adjacent spiral rings of the first section 21 and the diameter of its top ring are both smaller than the particle diameter of the packing material, so that the first section 21 can support the packing material. The gap between adjacent spiral rings of the first section 21 and its top ring are both channel openings facing into the tube 1. This arrangement allows the channel opening to block the packing material while allowing the reaction gas to pass through. Figure 2 As shown, the gap between adjacent spiral rings in the first part 21 is S, and the diameter of the top ring of the first part 21 is D1. Both S and D1 are smaller than the particle diameter of the packing.

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

[0042] Specifically, such as Figure 2 As shown, the pitch of the first part 21 is P1, and the pitch of the second part 22 is P2, i.e., 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, i.e., 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. The second part 22 is connected to 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 packing inside the tube 1.

[0044] Specifically, the radial dimension of the second part 22 is greater than or equal to the inner diameter of the tube 1, and the amount by which the radial dimension of the second part 22 is greater than the inner diameter of the tube 1 can be radially compressed by its own elasticity while its overall structural shape remains unchanged.

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

[0046] In one example, such as Figure 1 and Figure 5As shown, the support device also includes a support grid 3, which corresponds to multiple tubes 1 and can support multiple tube plugs 2 corresponding to multiple tubes 1. The support grid 3 includes a support cylinder 31 and multiple support bars 32 disposed in the support cylinder 31. The multiple support bars 32 have the same length direction and are evenly arranged at the same interval.

[0047] Specifically, multiple tube plugs 2 are evenly distributed on the support grid 3, and support bars 32 are used to support the tube plugs 2. The intervals between the multiple support bars 32 serve as exhaust channels for the reactant gas. In this way, the support grid 3 can stably support the tube plugs 2 and further support the tubes 1, while the support grid 3 does not obstruct the reactant gas inside the tubes 1 from being discharged outward through the channels. The support grid 3 can be welded together from flat steel bars, which are the support bars 32. The tubes 1 can be arranged in a triangular or parallelogram arrangement on the support grid 3, etc.

[0048] Furthermore, the support grid 3 also includes a plurality of self-aligning blocks 33 evenly distributed circumferentially along the outer side of the support cylinder 31. The self-aligning blocks 33 can adjust the installation posture of the support grid 3 in coordination with the reactor so that it is installed horizontally inside the reactor.

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

[0050] Specifically, such as Figure 1 As shown, the distance L between two adjacent support bars 32 is equal to the inner diameter d of the tube 1, i.e., L < d.

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

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

[0053] It needs to be explained, such as Figure 1 and Figure 2 As shown, the diameter of the third part 23 is D3, the outer diameter of tube 1 is D, and the diameter of the second part 22 is D2, that is, D3 > D > D2.

[0054] To better understand the above embodiments, the working principle of the packing support device of the present invention will be further explained below with reference to the accompanying drawings.

[0055] When loading the packing, the plug 2 is screwed into the lower end of the tube 1 until the second part 22 of the plug 2 is completely screwed into the tube 1. The support grid 3 supports each plug 2, and the packing is loaded from the top of the tube 1. When unloading the packing, the support grid 3 is first removed. At this time, the plug 2 and the packing inside the tube 1 will not loosen or fall off. Then, the plug 2 is pulled out by rotating the third part 23. The packing inside the tube 1 flows down by gravity.

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

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

[0058] The packing support method designed in this invention has a simple structure, is easy to install, fix, and disassemble, and will not obstruct the discharge of reaction gas inside the tube 1. After the plug 2 is screwed into the tube 1, the packing and plug 2 inside the tube 1 will not loosen or fall off. The support grid 3 further supports the packing and plug 2 inside the tube 1. The gas generated in the reaction inside the tube 1 can freely pass through the plug 2 and the support grid 3. There is no need to install ceramic balls, wire mesh, gas collectors, etc. of different diameters at the bottom of the equipment. When replacing the packing, simply screw the plug 2 in or out manually to replace part or all of the packing in the tube 1. The removed packing will not mix with the ceramic balls, making it easy to collect and reuse the packing.

[0059] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The 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 support device includes a tube and a plug disposed at one end of the tube. The tube is filled with filler, and the plug has a channel connecting the inside and outside of the tube. The channel can allow substances smaller than the filler to pass through, so that the plug can support and seal the filler inside the tube. The tube plug includes a first part, a second part, and a third part connected in sequence. The first part extends into the tube and supports the packing. The second part is helically connected to the tube. The third part is located outside the tube and is used to support and rotate the tube plug. The channel passes through the first part and the second part. The tube 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 and second parts are the same. The gap between adjacent spiral coils formed by the spiral winding of the first part matches the axial hollowness of the tube plug to form the channel. The inner wall of the tube is provided with an internal thread that matches the spiral of the second part, and the metal wire of the second part is embedded in the internal thread of the tube. The pitch of the second part is not less than the pitch of the first part. The diameter of the third part is D3, the outer diameter of the tube is D, and the diameter of the second part is D2, where D3 > D > D2. The third part has a planar geometric structure, and the axis of the third part is in the same plane as the axis of the second part; the third part is ring-shaped, and its axis is perpendicular to the axis of the second part. The support device further includes a support grid, which corresponds to a plurality of the tubes and can support a plurality of tube plugs corresponding to the plurality of the tubes. The support grid includes a support cylinder and a plurality of support bars disposed in the support cylinder. The plurality of support bars are aligned in the same length direction and are evenly arranged at the same interval. The spacing between two adjacent support bars is smaller than the inner diameter of the tube column, so that each tube plug can be supported by the corresponding support bar; The axial direction of the tube is perpendicular to the support plane of the support grid, and the central axis of the tube passes through the middle position of the two adjacent support bars.

2. The packing support device according to claim 1, characterized in that, The gap between adjacent spiral rings in the first part and the diameter of its top ring are both smaller than the particle diameter of the packing material, so that the first part can support the packing material.

3. The packing support device according to claim 1, characterized in that, The number of spiral turns in the second part is not less than the number of spiral turns in the first part.

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