A dehydrogenation reactor capable of replacing catalyst online

Abstract

The present invention discloses a dehydrogenation reactor capable of replacing catalysts online, and relates to the technical field of dehydrogenation reaction equipment. The dehydrogenation reactor comprises a central tube, a catalyst unloading hopper and a receiving platform, wherein the receiving platform comprises an upper receiving platform and a lower receiving platform, the upper receiving platform and the lower receiving platform penetrate the central tube and extend outward, and a driving assembly comprises a driving structure and a transmission structure, wherein the transmission structure comprises an upper transmission frame and a lower transmission frame, the upper transmission frame and the lower transmission frame are threadedly connected to the surface of the driving structure and driven to open and close by the driving structure, the upper transmission frame drives the upper receiving platform to open outward to unload, and the lower transmission frame synchronously drives the lower receiving platform to retract inward to feed, thereby improving production efficiency. In addition, honeycomb catalyst blocks are linearly arranged on the receiving platform, and a physical barrier is formed between the outer honeycomb catalyst blocks and the receiving platform to seal the central tube, thereby ensuring that the materials in the reaction chamber are in a closed environment and avoiding the risk of leakage.

Description

Technical Field

[0001] The invention relates to the technical field of dehydrogenation reaction equipment, in particular to a dehydrogenation reactor capable of replacing catalyst online. Background Art

[0002] A dehydrogenation reactor is a chemical equipment specially designed to perform dehydrogenation reactions.

[0003] A Chinese patent application with authorization announcement number CN109482115B discloses a dehydrogenation reactor for producing propylene by dehydrogenation of propane, comprising a reactor mechanism, a limiting mechanism and a protective cover A, wherein the inner wall of the protective cover A is provided with a protective cover B, and the protective cover B is fixedly connected to the reactor mechanism, the inner wall of the protective cover B is rotatably connected with a mask connecting rod, the lower surface of the protective cover A is rotatably connected with a protective mask, and the mask connecting rod is rotatably connected to the protective mask, and the protective cover A installed at one end of the hydrocarbon inlet, air inlet, reducing gas inlet, hydrocarbon outlet, air outlet and vacuum port and the protective mask on the inner wall of the protective cover A are designed to facilitate covering the hydrocarbon inlet, air inlet, reducing gas inlet, hydrocarbon outlet, air outlet and vacuum port, thereby solving the problem that foreign matter is easily introduced into the opening of the existing dehydrogenation reactor for producing propylene by dehydrogenation of propane when not in use or transported, thereby affecting its subsequent use.

[0004] Traditional dehydrogenation reactors mostly use a fixed bed structure, in which the catalyst is filled in the reactor in solid form. Although this design is simple and easy to operate, it faces many difficulties in practical applications: the dehydrogenation reaction is usually carried out under high temperature conditions, which will cause coke to gradually accumulate on the catalyst surface. Over time, the activity of the catalyst decreases significantly, affecting the reaction efficiency and product quality; and in order to restore the activity of the catalyst, it must be regenerated or replaced regularly. However, in traditional fixed-bed reactors, this process requires completely stopping production, disassembling the reactor, removing the old catalyst, and reloading the new catalyst. The whole process is complicated and time-consuming, often taking several days or even longer; secondly, each catalyst replacement means starting and stopping the reactor; and during the catalyst replacement process, the reactants and products will flow out with the failed catalyst, resulting in material waste.

[0005] To this end, the present invention proposes a dehydrogenation reactor in which the catalyst can be replaced online to solve the above-mentioned problem. Summary of the invention

[0006] In view of the above problems in the prior art, the present invention is proposed.

[0007] In order to solve the above technical problems, the present invention provides the following technical solution: a dehydrogenation reactor capable of replacing a catalyst online, comprising:

[0008] A central tube, wherein a reaction chamber is provided inside the central tube;

[0009] The catalyst unloading hopper has a loading trough formed by a plurality of circular holes evenly penetrated therein;

[0010] A material receiving platform, the material receiving platform comprises an upper material receiving platform and a lower material receiving platform, the upper material receiving platform and the lower material receiving platform penetrate the central tube and extend outwards;

[0011] The driving assembly includes a driving structure and a transmission structure. The transmission structure includes an upper transmission frame and a lower transmission frame. The upper transmission frame and the lower transmission frame are threadedly connected to the surface of the driving structure and are driven to open and close by the driving structure. The upper transmission frame drives the upper material receiving platform to open outward to unload, and the lower transmission frame synchronously drives the lower material receiving platform to retract inward to feed.

[0012] As a preferred solution of the dehydrogenation reactor with online replaceable catalyst described in the present invention, two groups of triangular sealing plate groups corresponding to the upper material receiving platform and the lower material receiving platform are provided in the reaction chamber, and the triangular sealing plate groups are inserted in the material receiving platform to seal the gaps between adjacent material receiving platforms, and guide holes are opened in the material receiving platform to allow materials to pass through.

[0013] As a preferred solution of the dehydrogenation reactor capable of online catalyst replacement according to the present invention, the upper transmission frame comprises an upper driving member and an upper sliding member, the lower transmission frame comprises a lower driving member and a lower sliding member, the upper sliding member and the lower sliding member are both threadedly connected to the surface of the driving structure, and are driven by the driving structure to move up and down synchronously;

[0014] The upper sliding member and the lower sliding member are respectively fixed to the two groups of triangular sealing plate groups, and the upper sliding member and the lower sliding member drive the two groups of triangular sealing plate groups to move up and down synchronously to disturb the flow, so as to re-drive the material distribution.

[0015] As a preferred embodiment of the dehydrogenation reactor capable of replacing the catalyst online according to the present invention, the two groups of triangular sealing plate groups are respectively an upper triangular sealing plate group and a lower triangular sealing plate group, the upper triangular sealing plate group comprises a plurality of upper triangular sealing plates, and the plurality of upper triangular sealing plates are arranged at equal intervals, and the lower triangular sealing plate group comprises a plurality of lower triangular sealing plates, and the plurality of lower triangular sealing plates are arranged at equal intervals;

[0016] The upper sliding member includes an integrated upper center threaded cylinder and an upper center connecting plate, and the lower sliding member includes an integrated lower center threaded cylinder and a lower center connecting plate. The upper center threaded cylinder is driven by the driving structure to drive the upper center connecting plate and the upper triangular sealing plate to move along the axis of the driving structure, and the lower center threaded cylinder is driven by the driving structure to drive the lower center connecting plate and the lower triangular sealing plate to move along the axis of the driving screw.

[0017] As a preferred solution of the dehydrogenation reactor capable of online catalyst replacement of the present invention, a guide structure is arranged on the inner wall of the central tube, and the upper triangular sealing plate is passively displaced along the center line of the guide structure under the guidance of the guide structure;

[0018] There are two groups of guide structures, which correspond to the upper triangular sealing plate and the lower triangular sealing plate respectively. The guide structure includes an integrated guide roller and two end plates. The two end plates are fixed at both ends of the guide roller. The two end plates are used to limit the maximum distance that the upper triangular sealing plate or the lower triangular sealing plate can move.

[0019] As a preferred solution of the dehydrogenation reactor with online replaceable catalyst described in the present invention, the upper driving member includes an upper hexagonal connecting ring, and upper annular limit plates for thickening are provided at both ends of the upper hexagonal connecting ring, a plurality of groups of upper driving connecting rods corresponding to the upper material receiving platform are provided at equal intervals on the outside of the upper hexagonal connecting ring, and an upper connecting seat is provided between the upper hexagonal connecting ring and the upper driving connecting rod, and between the upper driving connecting rod and the upper material receiving platform, and the upper hexagonal connecting ring is connected to the upper material receiving platform via the upper connecting seat and the upper driving connecting rod.

[0020] As a preferred solution of the dehydrogenation reactor with online replaceable catalyst described in the present invention, wherein: a pushing structure is provided inside the material receiving platform, the pushing structure includes a pushing unit and an elastic unit, the pushing unit includes a traction line, a traction block and a thrust plate, the traction line is bent and inserted into the inside of the material receiving platform, and is respectively connected to the traction block and the thrust plate at both ends passing through the material receiving platform, the elastic unit abuts against the surface of the traction block, and is compressed by the traction block to store energy.

[0021] As a preferred solution of the dehydrogenation reactor capable of online catalyst replacement of the present invention, wherein: a wire groove is provided on the upper surface of the material receiving platform, the traction block pulls the traction wire to slide in the wire groove, the elastic unit pulls the traction block to abut against the surface of the central tube through the traction wire, and the material receiving platform moves toward the central tube to release the traction wire;

[0022] The elastic unit is configured as a plurality of elastic rods, and the elastic force of the elastic rods acts on the thrust plate to push out the honeycomb catalyst block disposed in the charging trough.

[0023] As a preferred solution of the dehydrogenation reactor capable of online catalyst replacement according to the present invention, a plurality of horizontal rods are further provided on the upper surface of the thrust plate, and the plurality of horizontal rods are respectively connected to the thrust plate and the material receiving platform.

[0024] As a preferred solution of the dehydrogenation reactor capable of online catalyst replacement of the present invention, a groove is provided on the surface of the material receiving platform, the groove penetrates the material receiving platform to form an opening, and a through groove for the material receiving platform to penetrate is provided on the surface of the central tube, the groove drives the bottom surface of the material receiving platform to be arranged in an inclined surface;

[0025] A vibrator is arranged on the outer surface of the central tube, and the honeycomb catalyst block slides along the inclined surface at the bottom of the material receiving platform and slides until it abuts against the thrust plate to be positioned.

[0026] Beneficial effects of the present invention: The present invention realizes linear movement of the upper transmission frame and the lower transmission frame in opposite directions along the axis of the driving structure through precise control of the driving assembly, so that the upper material receiving table can be opened outward to remove the old catalyst block, while the lower material receiving table retracts inward to prepare to receive the new catalyst block, which simplifies the catalyst replacement process, reduces downtime, and improves production efficiency. In addition, the honeycomb catalyst blocks are linearly arranged on the material receiving table, and a physical barrier is formed between the outer honeycomb catalyst blocks and the material receiving table to seal the center tube, ensuring that the material in the reaction chamber is in a closed environment and avoiding the risk of leakage.

[0027] The present invention provides an upper triangular sealing plate and a lower triangular sealing plate to seal the gap between the upper material receiving platforms, so that the materials in the upper chamber of the reaction chamber can only flow into the lower chamber of the reaction chamber through the honeycomb catalyst block, so that all the materials are required to be catalyzed through the honeycomb catalyst block, thereby avoiding the situation where local materials do not fully contact the catalyst, ensuring the thoroughness of the reaction and the consistency of the products. At the same time, the upper triangular sealing plate and the lower triangular sealing plate in the reaction chamber perform reciprocating linear displacement under the action of the driving structure, disturbing the airflow in the reaction chamber, prompting the redistribution of the materials, and further ensuring that all the materials can evenly contact the catalyst. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0029] Figure 1 This is a cross-sectional view of the overall structure of a dehydrogenation reactor capable of replacing catalyst online according to the present invention;

[0030] Figure 2 For the present invention Figure 1 A magnified view of the structure at center;

[0031] Figure 3 This is a side view of the overall structure of a dehydrogenation reactor capable of replacing catalyst online according to the present invention;

[0032] Figure 4 For the present invention Figure 3 A magnified view of the structure at B in the middle;

[0033] Figure 5 For the present invention Figure 3 A magnified view of the structure at C in the middle;

[0034] Figure 6 It is a schematic diagram of the overall structure of the driving structure in the present invention;

[0035] Figure 7 It is a structural schematic diagram of the triangular sealing plate group in the present invention;

[0036] Figure 8 It is a structural schematic diagram of the material receiving platform in the present invention;

[0037] Fig. 9 It is a schematic diagram of the structure of the driving motor in the present invention.

[0038] Figure numerals: 11, center tube; 111, feed pipe; 112, discharge pipe; 113, through slot; 12, catalyst unloading hopper; 121, charging trough; 13, material receiving platform; 131, traction line; 132, traction block; 133, thrust plate; 134, guide hole; 135, horizontal rod; 136, elastic rod; 14, honeycomb catalyst block; 15, triangular sealing plate group; 21, guide structure; 211, guide roller; 212, end plate; 31, drive structure; 311, mounting frame; 312, drive motor; 313, drive Screw rod; 32, transmission structure; 321, upper transmission frame; 3211, upper driving connecting rod; 3212, upper hexagonal connecting ring; 3213, upper connecting seat; 3214, upper center threaded cylinder; 3215, upper center connecting plate; 3216, upper annular limiting plate; 322, lower transmission frame; 3221, lower driving connecting rod; 3222, lower hexagonal connecting ring; 3223, lower connecting seat; 3224, lower center threaded cylinder; 3225, lower annular limiting plate; 41, sealing structure; 411, revolving door; 412, roller; 413, side plate. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0041] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0042] Reference Figure 1-Figure 9 The present invention provides a dehydrogenation reactor capable of replacing a catalyst online, comprising:

[0043] The central tube 11 is connected with a feed pipe 111 on the upper side and a discharge pipe 112 on the lower side; a reaction chamber for realizing dehydrogenation reaction of materials is arranged inside the central tube 11, and the reaction chamber is provided with an inlet and an outlet for materials to enter and exit, the feed pipe 111 is connected with the inlet of the reaction chamber, and the discharge pipe 112 is connected with the outlet of the reaction chamber.

[0044] The catalyst unloading hopper 12 is annularly wrapped around the outside of the central tube 11 to keep the reaction chamber warm. A plurality of groups of honeycomb catalyst blocks 14 are stacked inside the catalyst unloading hopper 12. A plurality of loading troughs 121 formed by circular holes are evenly penetrated inside the catalyst unloading hopper 12. The plurality of groups of honeycomb catalyst blocks 14 correspond to the plurality of loading troughs 121. Each group of honeycomb catalyst blocks 14 is stacked and loaded in the loading trough 121.

[0045] A material receiving platform 13 is arranged in the reaction chamber, and the material receiving platform 13 includes an upper material receiving platform and a lower material receiving platform, and both the upper material receiving platform and the lower material receiving platform pass through the central tube 11 and extend outwards to be flush with the surface of the catalyst unloading hopper 12;

[0046] The driving assembly includes a driving structure 31 and a transmission structure 32. The transmission structure 32 includes an upper transmission frame 321 and a lower transmission frame 322. The upper transmission frame 321 and the lower transmission frame 322 are threadedly connected to the surface of the driving structure 31 and are driven to open and close by the driving structure 31. The upper transmission frame 321 drives the upper material receiving platform to open outward for unloading, and the lower transmission frame 322 drives the lower material receiving platform to retract inward for feeding.

[0047] like Figure 1 and Figure 3 As shown, two groups of triangular sealing plate groups 15 corresponding to the upper material receiving platform and the lower material receiving platform are provided in the reaction chamber respectively, the triangular sealing plate group 15 includes an upper triangular sealing plate group and a lower triangular sealing plate group, the upper triangular sealing plate group includes a plurality of upper triangular sealing plates, the plurality of upper triangular sealing plates are arranged at equal intervals, and the upper triangular sealing plates arranged at equal intervals are fixed to the side wall of the upper transmission frame 321, the lower triangular sealing plate group includes a plurality of lower triangular sealing plates, the plurality of lower triangular sealing plates are arranged at equal intervals, and the lower triangular sealing plates arranged at equal intervals are fixed to the side wall of the lower transmission frame 322.

[0048] Reference Figure 3 and Figure 4 The number of the upper material receiving platforms is multiple groups, and the multiple groups of upper material receiving platforms are evenly spaced, the upper material receiving platforms and the upper triangular sealing plates are staggered, and the gaps formed between adjacent upper triangular sealing plates provide a channel for the upper material receiving platform to place and pass materials, and the upper material receiving platform linearly displaces in the channel. The number of the lower material receiving platforms is multiple groups, and the multiple groups of lower material receiving platforms are evenly spaced, and the lower material receiving platforms and the lower triangular sealing plates are staggered, and the gaps formed between adjacent lower triangular sealing plates provide a channel for the lower material receiving platform to place and pass materials, and the lower material receiving platform linearly displaces in the channel, and the upper material receiving platform and the lower material receiving platform are driven linearly by the upper transmission frame 321 and the lower transmission frame 322 respectively, but the linear motion directions are opposite.

[0049] When the upper material receiving platform is retracted and abuts against the side wall of the upper transmission frame 321, the upper triangular sealing plate seals the gap between the two adjacent groups of upper material receiving platforms. At the same time, a plurality of guide holes 134 are opened on the surface of the upper material receiving platform. The materials entering the upper part of the reaction chamber must first pass through the honeycomb catalyst block 14 and then be introduced into the lower part of the reaction chamber through the guide holes 134 on the surface of the upper material receiving platform, ensuring that all materials can fully contact with the honeycomb catalyst block 14 and be catalyzed, so as to ensure that each portion of material can undergo a complete catalytic reaction process, thereby improving the thoroughness of the reaction and the consistency of the product.

[0050] The present device uses a honeycomb catalyst block 14, the purpose of which is that the honeycomb structure of the honeycomb catalyst block 14 has multiple channels for the passage of materials. The honeycomb catalyst block 14 provides a larger internal surface area and can carry more active sites, thereby enhancing the catalytic effect of the honeycomb catalyst block 14. Compared with catalysts of other shapes, the honeycomb catalyst block 14 has less resistance to the fluid, so that the material passes through each channel evenly, avoiding local overheating or insufficient reaction, and ensuring that all materials are in full contact with the catalyst. In addition, due to the openness of the honeycomb structure of the honeycomb catalyst block 14, heat can be more easily transferred to the catalyst surface, reducing the temperature gradient and ensuring the stability of the reaction conditions.

[0051] Reference Figure 3 , Figure 6 , Figure 7 as well as Fig. 9 A mounting frame 311 for supporting a driving structure 31 is also provided in the reaction chamber. The driving structure 31 includes a driving motor 312 and a driving screw 313. The driving screw 313 is connected to the end of the output shaft of the driving motor 312 and is driven to rotate by the driving motor 312.

[0052] The upper transmission frame 321 includes an upper driving member and an upper sliding member, the upper sliding member is threadedly connected to the surface of the driving screw 313, the upper sliding member includes an integrated upper center threaded cylinder 3214 and an upper center connecting plate 3215, the upper center connecting plate 3215 is fixedly connected to multiple upper triangular sealing plates, the driving screw 313 drives the upper center threaded cylinder 3214 and the upper center connecting plate 3215 to move along the axis of the driving screw 313 to drive the upper triangular sealing plate to move linearly.

[0053] A guide structure 21 is provided on the inner wall of the central tube 11 , and the upper triangular sealing plate is passively displaced along the axis of the driving screw 313 under the restriction of the guide structure 21 , rather than rotating in accordance with the rotation of the driving screw 313 .

[0054] There are two groups of guide structures 21, and the two groups of guide structures 21 correspond to the upper triangular sealing plate and the lower triangular sealing plate respectively. There are multiple guide structures 21 in each group, and each guide structure 21 includes an integrated guide roller 211 and two end plates 212. The two end plates 212 are fixed at both ends of the guide roller 211, and the two end plates 212 are used to limit the maximum distance of movement of the upper triangular sealing plate or the lower triangular sealing plate.

[0055] The lower transmission frame 322 includes a lower driving member and a lower sliding member, the lower sliding member is threadedly connected to the surface of the driving screw 313, the lower sliding member includes an integrated lower center threaded cylinder 3224 and a lower center connecting plate, the lower center connecting plate is fixedly connected to multiple lower triangular sealing plates, the driving screw 313 drives the lower center threaded cylinder 3224 and the lower center connecting plate to move along the axis of the driving screw 313 to drive the lower triangular sealing plate to move linearly, and at the same time, the lower triangular sealing plate is passively displaced along the axis of the driving screw 313 under the restriction of the guide structure 21, and the lower triangular sealing plate and the upper triangular sealing plate move away from or towards each other.

[0056] If a rotating structure is not added in the reaction chamber to allow the material to rotate in an orderly manner, the material entering the reaction chamber will gradually come to a standstill, the material close to the honeycomb catalyst block 14 will be fully reacted, while the material far away from the honeycomb catalyst block 14 will be less catalyzed. Therefore, in the present invention, a driving motor 312 is used to drive the driving screw 313 to rotate reciprocatingly, so that the upper triangular sealing plate and the lower triangular sealing plate are reciprocated linearly displaced under the action of the driving screw 313 and the lower center connecting plate. The linear displacement of the upper triangular sealing plate and the lower triangular sealing plate is used to disturb the airflow in the reaction chamber, so that the material in the reaction chamber is redistributed, and all materials are evenly contacted with the catalyst, which greatly improves the thoroughness of the reaction.

[0057] The upper driving member includes an upper hexagonal connecting ring 3212, and upper annular limit plates 3216 for thickening are provided at both ends of the upper hexagonal connecting ring 3212, and multiple groups of upper driving connecting rods 3211 corresponding to the upper material receiving platform are evenly spaced outside the upper hexagonal connecting ring 3212, and an upper connecting seat 3213 is provided between the upper hexagonal connecting ring 3212 and the upper driving connecting rod 3211, and between the upper driving connecting rod 3211 and the upper material receiving platform. The upper hexagonal connecting ring 3212 is connected to the upper driving connecting rod 3211 via the upper connecting seat 3213, and the upper driving connecting rod 3211 is connected to the upper material receiving platform via the upper connecting seat 3213.

[0058] Correspondingly, the structures of the lower driving member and the upper driving member are consistent, and the lower driving member includes a lower hexagonal connecting ring 3222 , a lower annular limiting piece 3225 , a lower driving connecting rod 3221 and a lower connecting seat 3223 .

[0059] An upper fixing rod is provided between the upper hexagonal connecting ring 3212 and the upper center threaded tube 3214, and the upper hexagonal connecting ring 3212 is synchronously displaced with the upper center threaded tube 3214 through the upper fixing rod. A lower fixing rod is provided between the lower hexagonal connecting ring 3222 and the lower center threaded tube 3224, and the lower hexagonal connecting ring 3222 is synchronously displaced with the lower center threaded tube 3224 through the lower fixing rod, wherein the driving screw 313 passes through the upper hexagonal connecting ring 3212, the upper annular limiting plate 3216, the lower hexagonal connecting ring 3222 and the lower annular limiting plate 3225, and the diameter of the hole through which the driving screw 313 passes through the upper hexagonal connecting ring 3212, the upper annular limiting plate 3216, the lower hexagonal connecting ring 3222 and the lower annular limiting plate 3225 is larger than the outer diameter of the driving screw 313.

[0060] The upper connecting seat 3213 includes an I-shaped shaft passing through the end of the upper driving connecting rod 3211, and an upper triangular connecting plate is rotatably connected to the surface of the I-shaped shaft. The upper triangular connecting plate located between the upper hexagonal connecting ring 3212 and the upper driving connecting rod 3211 is fixed to the surface of the upper hexagonal connecting ring 3212, and the upper triangular connecting plate located between the upper driving connecting rod 3211 and the upper material receiving platform is connected to the surface of the upper material receiving platform.

[0061] Specifically, when the lower center threaded cylinder 3224 or the upper center threaded cylinder 3214 moves on the driving screw 313, the lower hexagonal connecting ring 3222 or the upper hexagonal connecting ring 3212 is synchronously driven to move through the lower fixed rod or the upper fixed rod, and the moving lower hexagonal connecting ring 3222 pushes the lower material receiving platform to move through the lower connecting seat 3223 and the lower driving connecting rod 3221, and the moving upper hexagonal connecting ring 3212 pushes the upper material receiving platform to move through the upper connecting seat 3213 and the upper driving connecting rod 3211, so that the upper material receiving platform and the lower material receiving platform move in opposite directions, and when the upper material receiving platform moves outward to replace the honeycomb catalyst block 14, the replaced outer honeycomb catalyst block 14 is recovered by the lower material receiving platform and acts on the material in the reaction chamber.

[0062] like Figure 4 and Figure 8 As shown, the interior of the material receiving platform 13 is provided with an ejection structure, and the ejection structure includes an ejection unit and an elastic unit. The ejection unit includes a traction line 131, a traction block 132 and a thrust plate 133. The traction line 131 is bent and inserted into the interior of the material receiving platform 13, and is connected to the traction block 132 and the thrust plate 133 at both ends passing through the material receiving platform 13 respectively. The elastic unit abuts against the surface of the traction block 132 and is compressed by the traction block 132 to store energy.

[0063] The upper surface of the material receiving platform 13 is provided with a wire groove, the traction block 132 pulls the traction wire 131 to slide in the wire groove, the elastic unit pulls the traction block 132 to abut against the surface of the central tube 11 through the traction wire 131, and the material receiving platform 13 moves toward the central tube 11 to release the traction wire 131;

[0064] The elastic unit is configured as a plurality of elastic rods 136 , and the elastic force of the elastic rods 136 acts on the thrust plate 133 so that the honeycomb catalyst block 14 is pushed out quickly.

[0065] A plurality of horizontal rods 135 are also disposed on the upper surface of the thrust plate 133 . The horizontal rods 135 are disposed in the form of non-elastic expansion sheets. The plurality of horizontal rods 135 are respectively connected to the thrust plate 133 and the material receiving platform 13 .

[0066] First, the traction line 131 is folded into an S shape. When the material receiving platform 13 is retracted, the traction block 132 is located at the end of the material receiving platform 13 away from the central tube 11. At this time, all the traction lines 131 are located inside the material receiving platform 13, and the traction block 132 is in a stretched state, and the traction block 132 abuts against the surface of the central tube 11.

[0067] When the material receiving platform 13 moves outward, the traction block 132 moves forward under the elastic force of the elastic rod 136. The traction block 132 is still in contact with the surface of the center tube 11. When the elastic rod 136 is in a natural state, the elastic rod 136 cannot act on the traction line 131 to pull the traction block 132. At this time, there is no interaction between the traction block 132 and the center tube 11.

[0068] When the honeycomb catalyst block 14 on the supporting platform 13 needs to be pushed out, the supporting platform 13 needs to be driven to move quickly so that the elastic rod 136 is released instantaneously. The elastic force of the elastic rod 136 released instantaneously acts on the honeycomb catalyst block 14 through the thrust plate 133, so that the honeycomb catalyst block 14 is displaced on the supporting platform 13 and pushed out.

[0069] A groove is provided on the surface of the material receiving platform 13, and the groove penetrates the material receiving platform 13 to form an opening. A through groove 113 for the material receiving platform 13 to penetrate is provided on the surface of the central tube 11, and the groove drives the bottom surface of the material receiving platform 13 to be set in an inclined surface;

[0070] Reference Figure 3 As shown, a vibrator is disposed on the outer surface of the central tube 11, which causes the central tube 11 and the receiving platform 13 to vibrate synchronously. The honeycomb catalyst block 14 on the receiving platform 13 slides along the inclined surface at the bottom of the receiving platform 13 and slides until it abuts against the thrust plate 133 for positioning.

[0071] like Figure 5 and Figure 8 As shown, a sealing structure 41 is covered at the opening of the material receiving platform 13, and the sealing structure 41 includes a revolving door 411 and a roller 412. The revolving door 411 rotates on the surface of the roller 412, and side plates 413 are sleeved at both ends of the roller 412. The side plates 413 are fixed to the bottom of the catalyst unloading hopper 12. When the material receiving platform 13 is received in the reaction chamber, the revolving door 411 rotates and covers the opening of the material receiving platform 13 under the action of gravity. When the material receiving platform 13 moves outward, the revolving door 411 is squeezed by the material receiving platform 13 to deflect upward, and contacts with the upper part of the material receiving platform 13 under the action of gravity.

[0072] Working principle: The core of the design of the present invention is that it realizes the online replacement of the catalyst, that is, the replacement of the catalyst without interrupting the reaction process. Its working principle is achieved through a series of carefully designed mechanical structures and motion mechanisms. First, the entire reactor is built around a central tube 11, and there is a reaction chamber inside the central tube 11 for the material to realize the dehydrogenation reaction. The feed pipe 111 and the discharge pipe 112 are respectively connected to the inlet and outlet of the reaction chamber to ensure that the material can enter and exit smoothly.

[0073] The outside of the central tube 11 is wrapped with an annular catalyst unloading hopper 12, which not only plays a role in heat preservation, but also contains multiple groups of honeycomb catalyst blocks 14, which are stacked and loaded in the loading trough 121; in order to realize the online replacement of the catalyst, a loading platform 13 is set inside the reaction chamber, including an upper loading platform and a lower loading platform, the upper loading platform and the lower loading platform pass through the central tube 11 and extend outward to be flush with the surface of the catalyst unloading hopper 12, and the upper loading platform and the lower loading platform correspond to the loading trough 121 of the catalyst unloading hopper 12, so that the honeycomb catalyst blocks 14 in the loading trough 121 fall into the loading platform 13 to realize automatic loading.

[0074] When the catalyst needs to be replaced online, the driving motor 312 transmits power by rotating the driving screw 313 connected to the end of its output shaft. Since the driving screw 313 is threadedly connected to the upper slide and the lower slide, as the driving screw 313 rotates, the upper slide and the lower slide will produce relative displacement in the axial direction of the driving screw 313. The upper driving member and the lower driving member are respectively located on the outer sides of the upper material receiving platform and the lower material receiving platform.

[0075] Specifically, the upper hexagonal connecting ring 3212 keeps synchronous movement with the upper center threaded tube 3214 through the upper fixed rod, and pushes the upper material receiving platform to expand outward through the upper driving connecting rod 3211 and the upper connecting seat 3213. At the same time, multiple upper triangular sealing plates located on the side walls of the upper hexagonal connecting ring 3212 move accordingly, and they are displaced linearly along the axis of the driving screw 313 under the guidance of the guide structure 21.

[0076] When the upper material receiving platform moves outward rapidly, the elastic rod 136 releases the stored energy to push the thrust plate 133 forward, and the horizontal rod 135 on the thrust plate 133 abuts against the lower part of the loading trough 121, and the honeycomb catalyst block 14 falls into the gap between the thrust plate 133 and the material receiving platform 13. The rapid forward movement of the thrust plate 133 instantly acts on the honeycomb catalyst block 14, causing it to quickly slide out of the material receiving platform 13.

[0077] At this time, the retraction action of the lower material receiving platform is also carried out synchronously. When the honeycomb catalyst block 14 on the surface of the lower material receiving platform is quickly pushed out, the lower material receiving platform retracts, and the elastic rod 136 is compressed under the pulling force of the traction line 131 and only abuts against the lower material receiving platform. The honeycomb catalyst block 14 located in the loading trough 121 falls on the surface of the lower material receiving platform, and the vibrator located on the outer surface of the central tube 11 will cause the central tube 11 and the material receiving platform 13 to vibrate synchronously. The honeycomb catalyst block 14 slides along the inclined surface at the bottom of the material receiving platform 13, and finally abuts against the thrust plate 133 for positioning, and the new honeycomb catalyst block 14 enters the reaction chamber.

[0078] Reference Figure 2 and Figure 3As shown, half of the outermost honeycomb catalyst block 14 is located directly below the loading groove 121 of the central tube 11, and the honeycomb catalyst block 14 in the loading groove 121 of the central tube 11 no longer falls, while cooperating with the receiving platform 13 to block the through groove 113 on the surface of the central tube 11.

[0079] When the upper material receiving platform is fully unfolded, the front end of the upper material receiving platform is used to block the through groove 113 , and at this time, the opening of the lower material receiving platform is sealed by the sealing structure 41 .

[0080] Through the precise control of the drive assembly, the upper transmission frame 321 and the lower transmission frame 322 of the device perform linear movement in opposite directions along the axis of the drive screw 313, so that the upper material receiving platform can be opened outward to remove the old catalyst block, while the lower material receiving platform retracts inward to prepare to receive the new catalyst block, thereby simplifying the catalyst replacement process, reducing downtime, and improving production efficiency. In addition, the triangular sealing plate group 15 in the reaction chamber performs reciprocating linear displacement under the action of the drive structure 31, disturbing the airflow in the reaction chamber, prompting the redistribution of the material, ensuring that all materials can be evenly contacted with the catalyst, and ensuring the thoroughness of the reaction and the consistency of the product.

[0081] The use of the vibrator further improves the positioning accuracy of the honeycomb catalyst block 14, ensuring that the catalyst block can slide along the inclined surface at the bottom of the support platform 13 and finally be positioned without manual loading or unloading, thereby improving the replacement efficiency of the honeycomb catalyst block 14.

[0082] The device is provided with a revolving door 411 and a roller 412 at the opening of the material receiving platform 13. When the material receiving platform 13 is retracted into the reaction chamber, the revolving door 411 is automatically closed under the action of gravity, covering the opening of the material receiving platform 13, forming a physical barrier to prevent the material from flowing out. When the material receiving platform 13 moves outward, the revolving door 411 is squeezed by the material receiving platform 13 and deflected upward, and contacts the upper part of the material receiving platform 13 under the action of gravity, and is blocked by the honeycomb catalyst block 14, and still maintains a sealed state, ensuring that the materials in the reaction chamber are in a closed environment, avoiding the risk of leakage. In addition, the vibrator located on the outer surface of the central tube 11 causes the central tube 11 and the material receiving platform 13 to vibrate synchronously, helping the honeycomb catalyst block 14 to slide along the inclined surface at the bottom of the material receiving platform 13 and finally abut against the thrust plate 133. This process not only improves the positioning accuracy of the honeycomb catalyst block 14, but also uses the precisely positioned honeycomb catalyst block 14 to cooperate with the material receiving platform 13 to block the through groove 113 on the surface of the central tube 11, thereby achieving double blocking.

[0083] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and equal changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention should all fall within the scope of the patent coverage of the present invention.

[0084] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0085] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0086] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dehydrogenation reactor capable of replacing catalyst online, characterized in that: include: A central tube (11) having a reaction chamber disposed therein; A catalyst unloading hopper (12) is annularly wrapped around the outside of the central tube (11) to insulate the reaction chamber. A plurality of groups of honeycomb catalyst blocks (14) are stacked inside the catalyst unloading hopper (12). A charging trough (121) formed by a plurality of circular holes is uniformly penetrated inside the catalyst unloading hopper (12). The plurality of groups of honeycomb catalyst blocks (14) correspond to the plurality of charging troughs (121), and each group of honeycomb catalyst blocks (14) is stacked and loaded in the charging trough (121); A material receiving platform (13), the material receiving platform (13) comprising an upper material receiving platform and a lower material receiving platform, the upper material receiving platform and the lower material receiving platform passing through the central tube (11) and extending outwards, two sets of triangular sealing plate groups (15) corresponding to the upper material receiving platform and the lower material receiving platform respectively are arranged in the reaction chamber, the triangular sealing plate groups (15) are inserted in the material receiving platform (13) and used to block the gap between adjacent material receiving platforms (13), and a guide hole (134) is opened on the material receiving platform (13) to allow materials to pass through; A driving assembly comprises a driving structure (31) and a transmission structure (32), wherein the transmission structure (32) comprises an upper transmission frame (321) and a lower transmission frame (322), wherein the upper transmission frame (321) and the lower transmission frame (322) are threadedly connected to the surface of the driving structure (31) and driven to open and close by the driving structure (31), wherein the upper transmission frame (321) drives the upper material receiving platform to open outwards for unloading, and the lower transmission frame (322) synchronously drives the lower material receiving platform to retract inwards for feeding.

2. The dehydrogenation reactor with online catalyst replacement according to claim 1, characterized in that: The upper transmission frame (321) includes an upper driving member and an upper sliding member, and the lower transmission frame (322) includes a lower driving member and a lower sliding member, and the upper sliding member and the lower sliding member are both threadedly connected to the surface of the driving structure (31) and are driven by the driving structure (31) to move up and down synchronously; The upper slide member and the lower slide member are respectively fixed to the two groups of triangular sealing plate groups (15), and the upper slide member and the lower slide member drive the two groups of triangular sealing plate groups (15) to move up and down synchronously to disturb the flow, so as to re-drive the material distribution.

3. The dehydrogenation reactor with online catalyst replacement according to claim 2, characterized in that: The two groups of triangular sealing plate groups (15) are respectively an upper triangular sealing plate group and a lower triangular sealing plate group, the upper triangular sealing plate group comprises a plurality of upper triangular sealing plates, and the plurality of upper triangular sealing plates are arranged at equal intervals, and the lower triangular sealing plate group comprises a plurality of lower triangular sealing plates, and the plurality of lower triangular sealing plates are arranged at equal intervals; The upper sliding member includes an integrated upper center threaded cylinder (3214) and an upper center connecting plate (3215), and the lower sliding member includes an integrated lower center threaded cylinder (3224) and a lower center connecting plate. The upper center threaded cylinder (3214) is driven by the driving structure (31) to drive the upper center connecting plate (3215) and the upper triangular sealing plate to move along the axis of the driving structure (31), and the lower center threaded cylinder (3224) is driven by the driving structure (31) to drive the lower center connecting plate and the lower triangular sealing plate to move along the axis of the driving screw (313).

4. The dehydrogenation reactor with online catalyst replacement according to claim 3, characterized in that: A guide structure (21) is provided on the inner wall of the central tube (11), and the upper triangular sealing plate is passively displaced along the center line of the guide structure (21) under the guidance of the guide structure (21); The number of the guide structures (21) is two groups, and the two groups of the guide structures (21) correspond to the upper triangular sealing plate and the lower triangular sealing plate respectively. The guide structures (21) include an integrated guide roller (211) and two end plates (212). The two end plates (212) are fixed to the two ends of the guide roller (211), and the two end plates (212) are used to limit the maximum distance of movement of the upper triangular sealing plate or the lower triangular sealing plate.

5. The dehydrogenation reactor with online catalyst replacement according to claim 4, characterized in that: The upper driving member comprises an upper hexagonal connecting ring (3212), and upper annular limiting plates (3216) for thickening are arranged at both ends of the upper hexagonal connecting ring (3212); a plurality of groups of upper driving connecting rods (3211) corresponding to the upper material receiving platform are arranged at equal intervals outside the upper hexagonal connecting ring (3212); an upper connecting seat (3213) is arranged between the upper hexagonal connecting ring (3212) and the upper driving connecting rod (3211), and between the upper driving connecting rod (3211) and the upper material receiving platform; the upper hexagonal connecting ring (3212) is connected to the upper material receiving platform via the upper connecting seat (3213) and the upper driving connecting rod (3211).

6. The dehydrogenation reactor with online catalyst replacement according to claim 5, characterized in that: The inside of the material receiving platform (13) is provided with an ejection structure, the ejection structure comprises an ejection unit and an elastic unit, the ejection unit comprises a traction line (131), a traction block (132) and a thrust plate (133), the traction line (131) is bent and inserted into the inside of the material receiving platform (13), and is respectively connected to the traction block (132) and the thrust plate (133) at the two ends passing through the material receiving platform (13), the elastic unit abuts against the surface of the traction block (132) and is compressed by the traction block (132) to store energy.

7. The dehydrogenation reactor with online catalyst replacement according to claim 6, characterized in that: The upper surface of the material receiving platform (13) is provided with a wire groove, the traction block (132) pulls the traction wire (131) to slide in the wire groove, the elastic unit pulls the traction block (132) to abut against the surface of the central tube (11) through the traction wire (131), and the material receiving platform (13) moves toward the central tube (11) to release the traction wire (131); The elastic unit is configured as a plurality of elastic rods (136), and the elastic force of the elastic rods (136) acts on the thrust plate (133) so that the honeycomb catalyst block (14) disposed in the charging trough (121) is pushed out.

8. The dehydrogenation reactor with online catalyst replacement according to claim 7, characterized in that: A plurality of horizontal rods (135) are also provided on the upper surface of the thrust plate (133), and the plurality of horizontal rods (135) are respectively connected to the thrust plate (133) and the material receiving platform (13).

9. The dehydrogenation reactor with online catalyst replacement according to claim 8, characterized in that: A groove is provided on the surface of the material receiving platform (13), the groove penetrates the material receiving platform (13) to form an opening, and a through groove (113) for the material receiving platform (13) to penetrate is provided on the surface of the central tube (11), the groove drives the bottom surface of the material receiving platform (13) to be arranged in an inclined surface; A vibrator is arranged on the outer surface of the central tube (11), and the honeycomb catalyst block (14) slides along the inclined surface at the bottom of the material receiving platform (13) and slides until it abuts against the thrust plate (133) to be positioned.

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