Acetone hydrogenation reactor

Abstract

The utility model relates to the technical field of acetone hydrogenation reactors, in particular to an acetone hydrogenation reactor which comprises an upper-section reactor, a middle-section reactor and a lower-section reactor. A distributor for enabling an acetone solution to be in uniform contact with a catalyst, a whole packing and a honeycomb-shaped structure are arranged in the upper sealing head, the whole packing is arranged between the distributor and the honeycomb-shaped structure, and a hydrogen feeding pipe communicated with the interior of the upper sealing head is arranged at the top of the upper sealing head; an acetone feeding pipe communicated with the interior of the upper sealing head is arranged on the side wall of the upper sealing head in a penetrating manner; and the acetone feeding pipe is positioned above the distributor. The method has the effects of improving the problem that hydrogen and an acetone solution in the reactor are not uniformly and fully contacted, fully exerting the performance of the catalyst and increasing the content of target reactants.

Description

Technical Field

[0001] The present application relates to the technical field of acetone hydrogenation reactors, and in particular to an acetone hydrogenation reactor. Background Art

[0002] In the petrochemical industry, acetone hydrogenation reaction is a relatively mature process for producing MIBK, DIBK, IPA, MIBC, DIBC and other substances.

[0003] In the related art, the reaction of acetone hydrogenation needs to be carried out under catalyst conditions. Due to the excellent performance and high efficiency of the catalyst, the overall catalytic reaction of acetone hydrogenation is also relatively stable. The catalytic reaction between acetone hydrogenation is usually completed in a tubular fixed bed reactor, but in the reactor of the prior art, there is usually uneven and insufficient contact between hydrogen and acetone solution.

[0004] Under the premise that the catalyst life is a fixed value, insufficient contact between hydrogen and acetone will reduce the reaction efficiency. On the one hand, the performance of the catalyst cannot be fully exerted, and on the other hand, it will also lead to a decrease in the content of the target reactant and an increase in the impurity content. Utility Model Content

[0005] In order to improve the problem of uneven and insufficient contact between hydrogen and acetone solution in the reactor, give full play to the catalyst performance, and increase the content of target reactants, the present application provides an acetone hydrogenation reactor.

[0006] The present application provides an acetone hydrogenation reactor adopts the following technical solution:

[0007] An acetone hydrogenation reactor, comprising an upper reactor, a middle reactor and a lower reactor, wherein the middle reactor is arranged between the upper reactor and the lower reactor, and the middle reactor is interconnected and fixedly connected with the upper reactor and the lower reactor;

[0008] The upper reactor comprises an upper end cap, wherein a distributor, a structured filler and a honeycomb structure for making the acetone solution and hydrogen contact evenly are arranged inside the upper end cap, wherein the structured filler is arranged between the distributor and the honeycomb structure, a hydrogen feed pipe connected to the interior of the upper end cap is arranged on the top of the upper end cap, an acetone feed pipe connected to the interior of the upper end cap is penetrated on the side wall of the upper end cap, and the acetone feed pipe is located above the distributor;

[0009] The middle reactor is provided with a catalytic tube for filling a catalyst;

[0010] A discharge pipe is arranged at the bottom of the lower stage reactor.

[0011] By adopting the above technical scheme, by arranging a distributor, a monolithic packing and a honeycomb structure in the upper reactor, it can be ensured that the acetone solution can be evenly distributed when entering the reactor and fully contact with hydrogen. The acetone solution entering and falling from the acetone feed pipe flows evenly into the distributor, and the acetone solution falls evenly from the distributor to the monolithic packing, and the acetone solution falls into the honeycomb structure after passing through the monolithic packing. So far, the acetone solution is evenly distributed three times through the distributor, the monolithic packing and the honeycomb structure in the upper reactor, and then enters the catalytic tube of the middle reactor. The acetone solution is fully contacted with hydrogen and evenly mixed, making the catalytic reaction process more stable and controllable, reducing the occurrence of side reactions, reducing the generation of by-products, thereby improving the purity of the target product and improving the utilization efficiency of the catalyst.

[0012] Further, the distributor comprises a bottom plate and a plurality of downcomers evenly arranged on the bottom plate, the bottom plate is arranged on the inner wall and is located between the structured filler and the acetone feed pipe, each of the downcomers is vertically penetrated and fixedly connected to a side of the bottom plate away from the structured filler, one end of each of the downcomers close to the acetone feed pipe is flush with each other, and one end of each of the downcomers away from the acetone feed pipe protrudes from the bottom plate;

[0013] A supporting ring plate for supporting the bottom plate is arranged on the inner side wall of the upper head, and the bottom plate abuts against the supporting ring plate and is detachably connected to the supporting ring plate.

[0014] By adopting the above technical solution, the distributor is provided with a number of evenly arranged downcomers on the bottom plate, which can ensure that the acetone solution is evenly distributed when entering the reactor, thereby avoiding uneven mixing caused by excessively high or low liquid concentration in local areas, which helps to improve the subsequent catalytic reaction efficiency and product purity. The downcomers are arranged vertically with the bottom plate, which can make the acetone solution fall vertically and achieve the effect of even distribution in the monolithic packing during the falling process. The ends of the downcomers close to the acetone feed pipe are flush with each other, which is convenient for controlling the entry and distribution of the liquid. The detachable connection between the bottom plate and the supporting ring plate facilitates the cleaning, replacement or maintenance of the distributor, and improves the convenience of subsequent maintenance of the equipment.

[0015] Furthermore, a plurality of reinforcing members for supporting the bottom plate are provided on the inner wall of the upper head, each of the reinforcing members is circumferentially arranged and fixedly connected to the inner wall of the upper head, and each of the reinforcing members abuts against an edge position of the bottom plate close to one side of the structured filler.

[0016] By adopting the above technical solution, the reinforcement is circumferentially arranged and fixedly connected to the inner wall of the upper head, and the reinforcement and the bottom plate abut against each other to improve the structural strength of the bottom plate support position. On the one hand, it can ensure that the bottom plate will not be deformed or displaced when it is subjected to the weight and impact force of the acetone solution. On the other hand, there is a pressure difference between the upper and lower ends of the downcomer. The arrangement of the reinforcement can prevent the deformation of the bottom plate caused by the pressure generated by the downcomer on the bottom plate, thereby ensuring the stability and reliability of the reactor.

[0017] Furthermore, a plurality of tear holes for the acetone solution to flow into the tube are provided on the upper tube wall of each downcomer.

[0018] By adopting the above technical solution, the opening of a plurality of tear holes allows the acetone solution to enter the downcomer from the plurality of tear holes, and the amount and flow rate of the acetone solution entering are controlled, which helps to evenly distribute the acetone solution, thereby improving the contact effect between the acetone solution and the hydrogen, and improving the reaction efficiency and the purity of the product. At the same time, the plurality of tear holes disperse the inflow of the acetone solution, which can avoid the blockage of the downcomer caused by a single inlet, and helps to improve the stability and operation efficiency of the reactor.

[0019] Furthermore, the structured packing is located below the bottom plate to receive the acetone solution flowing down from the downcomer, a side of the structured packing away from the bottom plate abuts against the honeycomb structure, a plurality of through holes for the acetone solution to pass through are provided on the structured packing, and both sides of the structured packing are provided with corrugated structures for evenly distributing the acetone solution.

[0020] By adopting the above technical solution, the structured packing is located below the bottom plate and can receive the acetone solution flowing down the downcomer. The arrangement of the corrugated structure can increase the spreading area of ​​the acetone solution on the structured packing plate, so that the acetone solution is evenly distributed to the entire packing layer, thereby enhancing the uniformity of liquid distribution. The through holes play the role of allowing the solution to pass through, so that the evenly spread solution penetrates into the honeycomb structure below.

[0021] Furthermore, the number of the structured packings is at least two, two adjacent structured packings are arranged parallel to each other and stacked side by side up and down, and the corrugated structures on two adjacent structured packings are perpendicular to each other and abut against each other.

[0022] By adopting the above technical solution, through the arrangement of at least two monolithic packings, the acetone solution can flow between multiple packing layers, and after multiple distributions, the uniformity of the distribution of the acetone solution is further improved. The corrugated structures on two adjacent monolithic packings are perpendicular to each other and abut against each other, which can form a more complex flow channel inside the packing layer, which helps the acetone solution to form a more complex flow pattern in the packing layer, thereby increasing the contact opportunity and contact time between the acetone solution and hydrogen, and helping to improve the efficiency of the subsequent catalytic reaction.

[0023] Furthermore, the honeycomb structure includes a mounting plate and a plurality of prismatic tubes, the mounting plate is evenly provided with a plurality of flow holes, each of the prismatic tubes is vertically arranged and fixedly connected to the mounting plate and corresponds to the position of each of the flow holes one by one, the side walls of adjacent prismatic tubes abut against each other and form a honeycomb together, and one end of the prismatic tube away from the mounting plate abuts against the structured filler;

[0024] The number of the catalytic tubes in the middle stage reactor is several, and each of the catalytic tubes is arranged below the mounting plate and corresponds one by one to each of the flow holes.

[0025] By adopting the above technical solution, the evenly arranged flow holes on the mounting plate and the vertically arranged prismatic tubes can form a complex flow channel, so that the acetone solution is fully mixed with the hydrogen when flowing through these flow channels, which helps to achieve uniform distribution and efficient mixing of gas and liquid, thereby improving the reaction efficiency. The catalytic tubes in the middle section reactor correspond one-to-one to the flow holes, so that each catalytic tube can receive a uniformly distributed mixture of acetone solution and hydrogen, ensuring that the catalyst can be fully utilized, and also making the catalytic reaction conditions stable and controllable. The catalytic tube is arranged below the flow hole, so that the reactants can flow directly into the catalytic tube for reaction, avoiding unnecessary stay and diffusion of the reactants in the reactor, thereby improving the utilization efficiency of the catalyst. The side walls of the prismatic tubes abut against each other to form a honeycomb structure, which not only increases the surface area of ​​the reactor, but also helps to increase the abutment area between the monolithic packing and the prismatic tube, and enhances the structural strength of the reactor.

[0026] Furthermore, the middle section reactor is provided with a first flower plate and a second flower plate for installing the catalytic tubes, the first flower plate is located at the upper part of the middle section reactor and abuts against the mounting plate, the second flower plate is located at the lower part of the middle section reactor, the first flower plate and the second flower plate are parallel to each other and are fixedly connected to the inner wall of the middle section sensor, the first flower plate and the second flower plate are both provided with a plurality of mounting holes for inserting the catalytic tubes, the catalytic tubes are vertically inserted into the mounting holes and fixedly connected to the flower plates, and the catalytic tubes are interconnected with the upper section reactor and the lower section reactor.

[0027] By adopting the above technical solution, the first flower plate and the second flower plate provide a stable installation platform for the catalytic tube. The first flower plate and the second flower plate are both fixedly connected to the inner wall of the middle section reactor, and the first flower plate and the second flower plate are arranged in parallel to ensure that the catalytic tube can remain vertical and evenly distributed during installation, thereby improving the overall structural stability of the reactor. A number of installation holes are provided on the first flower plate and the second flower plate, and each installation hole corresponds to each catalytic tube one by one, so that the catalytic tube can be quickly and stably fixed on the two flower plates by vertical insertion, while also ensuring the connectivity between the catalytic tube and the upper section reactor and the lower section reactor.

[0028] Furthermore, a wedge-shaped screen is provided in the lower reactor, and the wedge-shaped screen is located below the second flower plate and a gap is left between the second flower plate for temporary storage of reactants. An I-beam frame for supporting the wedge-shaped screen is fixedly connected to the inner wall of the lower reactor, and the I-beam frame abuts against the bottom of the wedge-shaped screen.

[0029] By adopting the above technical solution, the wedge-shaped screen is located below the second flower plate, and a gap is left between the second flower plate. The gap can temporarily store the reaction products and catalyst particles falling from the catalytic tube. In the case of continuous production, some catalyst particles may escape from the catalytic tube. These particles will be intercepted and isolated by the wedge-shaped screen to prevent leakage into the subsequent system and avoid the catalyst blocking the system pipeline. It also avoids the loss of a large amount of catalyst, resulting in a decrease in catalyst efficiency, a decrease in the target reactant content, and an increase in the impurity content. It also facilitates the recovery and reuse of the catalyst.

[0030] Furthermore, the acetone feed pipe includes a depth pipe and at least two branch pipes, the depth pipe is passed through and fixedly connected to the side wall of the upper head, the depth pipe is located above the downcomer, each of the branch pipes is integrally connected to one end of the depth pipe located inside the upper head, and each of the branch pipes extends away from the end connected to the depth pipe to the gap between adjacent downcomers.

[0031] By adopting the above technical solution, the deep pipe is used to supply the acetone solution to the interior of the upper head, and the acetone solution can be evenly distributed to various areas above the distributor through the coordinated arrangement of the deep pipe and multiple branch pipes. The branch pipes extend into the gaps between adjacent downcomers to ensure that the branch pipes do not interfere with the downcomers. The solution concentrations in different areas of the reactor may differ, and the uniform distribution of the acetone solution helps to reduce the differences, making the mixing of the acetone solution and hydrogen more uniform and controllable. The catalyst can also be more fully in contact with the reactants, thereby improving the utilization efficiency of the catalyst and helping to improve the reaction efficiency.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. The distributor, packed packing and honeycomb structure in the upper reactor allow the acetone solution and hydrogen to be fully mixed, so that when the reactants meet the catalyst, the catalyst can play its role to the maximum extent, improve the efficiency of the catalytic reaction, and also improve the purity of the reaction product;

[0034] 2. In the middle reactor, several catalytic tubes are arranged so that the reactants can be more fully exposed to the catalyst;

[0035] 3. Between the middle reactor and the lower reactor, the wedge-shaped screen can effectively intercept the catalyst, prevent the catalyst particles from leaking into the subsequent system, and avoid the catalyst blocking the pipeline of the subsequent system. It also avoids the loss of a large amount of catalyst, which causes the catalyst efficiency to decrease, resulting in a decrease in the content of the target reactant and an increase in the impurity content. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic cross-sectional view of the structure of an acetone hydrogenation reactor according to an embodiment of the present application.

[0037] Figure 2 It is a front view of the acetone feed pipe in the embodiment of the present application.

[0038] Figure 3 1 is a top view of the acetone feed pipe in the embodiment of the present application.

[0039] Figure 4 It is a front view of the distributor and the structured packing in the embodiment of the present application.

[0040] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of part A.

[0041] Figure 6 It is a top view of the distributor in the embodiment of the present application.

[0042] Figure 7 It is a front view of the honeycomb structure in the embodiment of the present application.

[0043] Figure 8 It is a top view of the mounting plate in an unassembled state in the embodiment of the present application.

[0044] Fig. 9 It is a top view of the assembled honeycomb structure in the embodiment of the present application.

[0045] Fig.10 1 is a top view of the wedge-shaped screen in the embodiment of the present application.

[0046] Fig.11 It is a front view of the wedge-shaped screen and the I-beam frame in the embodiment of the present application.

[0047] Description of the reference numerals: 1. upper reactor; 11. upper head; 12. distributor; 121. bottom plate; 122. downcomer; 1221. tear hole; 123. supporting ring plate; 124. reinforcement; 13. structured packing; 131. through hole; 132. corrugated structure; 14. honeycomb structure; 141. mounting plate; 1411. flow hole; 142. prismatic tube; 143. bite teeth; 15. hydrogen feed pipe; 16. acetone feed pipe; 16 1. Deep pipe; 162. Branch pipe; 2. Middle section reactor; 21. Catalytic tube; 22. First flower plate; 23. Second flower plate; 24. Mounting hole; 25. Coolant inlet; 26. Baffle; 27. Temperature measuring port; 28. Coolant outlet; 3. Lower section reactor; 31. Lower head; 32. Wedge-shaped screen; 33. I-beam frame; 34. Screen side filler; 35. Gas extraction pipe; 36. Liquid level meter; 37. Material reflux pipe; 38. Discharge pipe. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-11 And embodiments, the present application is further described in detail.

[0049] The present application discloses an acetone hydrogenation reactor. The words such as "upper" and "lower" used to express the positional relationship in the present embodiment are determined with reference to the placement and installation position of the reactor when it is in normal use.

[0050] Reference Figure 1 The acetone hydrogenation reactor comprises an upper reactor 1, a middle reactor 2 and a lower reactor 3 arranged in sequence from top to bottom. The outer shell of the middle reactor 2 is a cylindrical shell, and the middle reactor 2 is between the upper reactor 1 and the lower reactor, and is fixedly connected to the upper reactor 1 and the lower reactor through a flange.

[0051] The upper reactor 1 includes an upper end cap 11 for connecting to the middle reactor 2. A hydrogen feed pipe 15 for introducing hydrogen is provided at the top of the upper end cap 11. The hydrogen feed pipe 15 is connected to the interior of the upper end cap 11. An acetone feed pipe 16 for introducing acetone solution is provided on the side wall of the upper end cap 11.

[0052] Reference Figure 2 and Figure 3The acetone feed pipe 16 includes a deep pipe 161 and a branch pipe 162 which are interconnected and integrally connected. The deep pipe 161 is vertically penetrated and flange-connected to the side wall of the upper end cap 11. One end of the deep pipe 161 located inside the upper end cap 11 is located at the central axis of the upper end cap 11. The number of branch pipes 162 in this embodiment is preferably two, and the two branch pipes 162 are axially symmetrically arranged with respect to the length direction of the deep pipe 161, and the two branch pipes 162 are vertically connected to the ends of the deep pipe 161, and the two branch pipes 162 are extended downward away from the end connected to the deep pipe 161.

[0053] Reference Figure 1 and Figure 4 The upper end cap 11 is provided with a distributor 12, a structured filler 13 and a honeycomb structure 14 from top to bottom for evenly distributing the acetone solution and fully mixing it with the hydrogen. The distributor 12 includes a bottom plate 121 and a downcomer 122. In this embodiment, there are a number of downcomers 122, each of which is evenly arranged and vertically fixedly connected to the bottom plate 121.

[0054] Combination Figure 5 , a supporting ring plate 123 for placing and fixing the bottom plate 121 is vertically fixedly connected to the inner wall of the upper head 11, and the bottom plate 121 and the supporting ring plate 123 are in contact with each other. Since there is a hydraulic pressure difference between the upper and lower ends of the downcomer 122, a certain pressure is generated on the bottom plate 121. In order to prevent the bottom plate 121 from being deformed due to pressure, a reinforcement member 124 is also provided below the supporting ring plate 123 of this embodiment. The material of the reinforcement member 124 is preferably a metal member with a certain supporting strength, and the reinforcement member 124 is L-shaped as a whole. There are a number of reinforcement members 124, and each reinforcement member 124 is evenly circumferentially arranged and fixedly connected to the inner wall of the upper head 11. The reinforcement member 124 is located below the supporting ring plate 123, and the connecting member passes through the bottom plate 121, the supporting ring plate 123 and the reinforcement member 124 in sequence to thread the three.

[0055] Reference Figure 4 and Figure 6 , one end of each downcomer 122 near the acetone feed pipe 16 is flush with each other, and each downcomer 122 is arranged at the end position near the structured packing 13 and protrudes from the bottom plate 121. A plurality of tear holes 1221 for the acetone solution to enter are provided on the upper wall of each downcomer 122. In order to control the rate at which the acetone solution flows into each downcomer 122 and the uniformity of the acetone inflow, at least two tear holes 1221 in this embodiment are symmetrically provided on the wall of the downcomer 122. Figure 1No downcomer 122 is installed on the bottom plate 121 at the corresponding position below the branch pipe 162. The branch pipe 162 extends into the gap between adjacent downcomers 122 to avoid mutual interference with the downcomers 122. The end of the branch pipe 162 extends toward the bottom plate 121 and leaves a gap between the end of the branch pipe 162 and the bottom plate 121.

[0056] Reference Figure 4 and Figure 5 The structured packing 13 in this embodiment is a plate structure whose shape matches the inner wall of the upper head 11. A plurality of through holes 131 for the acetone solution to flow through are evenly opened on the structured packing 13. Both sides of the structured packing 13 are provided with corrugated structures 132 for evenly spreading the acetone solution. The number of structured packings 13 in this embodiment is preferably two. The plates of the two structured packings 13 are parallel to each other and stacked up and down. The corrugated structures 132 of the two structured packings 13 are perpendicular to each other and abut against each other.

[0057] Reference Figure 7 The honeycomb structure 14 includes a mounting plate 141 and prismatic tubes 142. The number of prismatic tubes 142 is uniformly distributed on the mounting plate 141. The mounting plate 141 is uniformly provided with a number of flow holes 1411, and the number of the flow holes 1411 corresponds to the number of the prismatic tubes 142. Each prismatic tube 142 is vertically fixedly connected to a side of the mounting plate 141 close to the structured packing 13, and each prismatic tube 142 is installed at a corresponding position of each flow hole 1411.

[0058] Reference Figure 1 and Figure 7 The middle section reactor 2 is provided with a plurality of catalytic tubes 21 for filling catalyst particles, and a first flower plate 22 and a second flower plate 23 for fixing the catalytic tubes 21. The first flower plate 22 and the second flower plate 23 are parallel to each other and are both fixedly connected to the inner wall of the middle section reactor 2. The first flower plate 22 is located at the upper part of the middle section reactor 2 and abuts against the lower part of the mounting plate 141, and the second flower plate 23 is located at the lower part of the middle section reactor 2.

[0059] The first flower plate 22 and the second flower plate 23 are provided with a plurality of mounting holes 24 for the catalytic tubes 21 to pass through, and each catalytic tube 21 is vertically inserted into each mounting hole 24 and fixedly connected between the first flower plate 22 and the second flower plate 23. Each catalytic tube 21 is interconnected with the upper reactor and the lower reactor 3, and the inner diameter of the catalytic tube 21 is slightly larger than the diameter of the flow hole 1411 to prevent the reactants from leaking out of the catalytic tube 21.

[0060] Reference Figure 8 and Fig. 9In order to facilitate the assembly of the honeycomb structure 14, the mounting plate 141 in this embodiment is composed of two symmetrical semicircular metal plates. Engaging teeth 143 are provided on the opposite surfaces of the two semicircular plates for mutual engagement. The two semicircular plates are fixed by connecting pieces through threads.

[0061] Reference Figure 1 A coolant inlet 25 and a coolant outlet 28 are respectively provided on the tube wall of the middle stage reactor 2. The coolant inlet 25 is located below the first flower plate 22, and the coolant outlet 28 is located above the second flower plate 23.

[0062] A number of baffles 26 are symmetrically arranged on the tube wall of the middle section reactor 2 for increasing the contact area between the coolant and the catalytic tube 21. Each baffle 26 is vertically fixedly connected to the inner wall of the middle section reactor 2. Each baffle 26 is interlaced with each other and arranged at equal intervals. The baffle 26 close to the first flower plate 22 is located below the coolant inlet 25, and the baffle 26 close to the second flower plate 23 is located above the coolant outlet 28. A number of temperature measuring ports 27 are equidistantly arranged on the outer tube wall of the middle section reactor 2, and each temperature measuring port 27 is connected to the interior of the middle section reactor 2.

[0063] Reference Fig.10 and Fig.11 The lower reactor 3 includes a lower head 31 connected to the middle reactor 2 by a flange, and a wedge-shaped screen 32 for intercepting catalyst particles is arranged in the lower head 31. Figure 1 The wedge-shaped screen 32 is located below the second flower plate 23 and a gap is left between the wedge-shaped screen 32 and the second flower plate 23 for temporary storage of catalyst particles.

[0064] A plurality of I-beam steel frames 33 are vertically fixedly connected to the inner wall of the lower end cap 31. The I-beam steel frames 33 are arranged parallel to each other and supported below the wedge-shaped screen 32. The wedge-shaped screen 32 and the I-beam steel frames 33 are threadedly fixed by connecting pieces. The edge of the wedge-shaped screen 32 and the inner wall of the lower end cap 31 are filled with a screen edge filler 34.

[0065] Combination Figure 1 A gas extraction pipe 35 for recovering residual hydrogen is vertically penetrated and fixedly connected on the outer wall of the lower head 31. One end of the gas extraction pipe 35 located inside the lower head 31 is bent downward and leaves a gap with the bottom of the lower head 31.

[0066] A liquid level gauge 36 for monitoring the liquid level of the reaction product is also provided on the outer wall of the lower end cap 31, and the liquid level gauge 36 is provided on the side of the outer wall of the lower end cap 31 away from the gas extraction pipe 35. A material reflux pipe 37 and a discharge pipe 38 communicating with the interior are provided on the outer wall at the bottom of the lower end cap 31. The discharge pipe 38 is vertically fixedly connected to the center axis of the lower end cap 31, and the material reflux pipe 37 is vertically fixedly connected to the adjacent position of the discharge pipe 38. The end of the material reflux pipe 37 away from the connection with the lower end cap 31 is bent toward the outer wall of the lower end cap 31 on the side where the gas extraction pipe 35 is provided.

[0067] The implementation principle of an acetone hydrogenation reactor in the embodiment of the present application is as follows: the acetone solution enters the upper reactor 1 through the acetone feed pipe 16. The acetone feed pipe 16 includes a penetration pipe 161 and a branch pipe 162, which ensure that the acetone solution can be evenly distributed to various areas of the upper head 11. The upper head 11 is provided with a distributor 12, a structured filler 13 and a honeycomb structure 14. The acetone solution flows evenly in the downcomer 122 of the distributor 12, and is further mixed with hydrogen through the structured filler 13 and the honeycomb structure 14. Through the joint action of each structure, uniform distribution and sufficient mixing are achieved.

[0068] The catalyst particles are filled in the catalytic tube 21 of the middle section reactor 2. The catalytic tube 21 is fixed in the middle section reactor 2 through the first flower plate 22 and the second flower plate 23 and is connected to the upper and lower section reactors 3, ensuring that the reactants can flow evenly through the catalytic tube 21 and fully contact the catalyst, thereby improving the utilization efficiency of the catalyst. The middle section reactor 2 is provided with a coolant inlet 25 and a coolant outlet 28, and the temperature of the reaction process is regulated by circulating the coolant therein to ensure that the reaction is carried out within a suitable temperature range. The provision of the baffle 26 increases the contact area between the coolant and the catalytic tube 21, thereby improving the cooling effect.

[0069] A wedge-shaped screen 32 is provided in the lower reactor 3 to intercept catalyst particles that may escape from the catalytic tube 21 and prevent them from entering the reaction product. The I-beam frame 33 enhances the stability and support capacity of the screen, and the setting of the screen edge filler 34 ensures the sealing between the screen and the inner wall of the lower head 31. A gas extraction pipe 35 is provided on the outer wall of the lower reactor 3 to recover the remaining hydrogen after the reaction.

[0070] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An acetone hydrogenation reactor, characterized in that: The invention comprises an upper reactor (1), a middle reactor (2) and a lower reactor (3), wherein the middle reactor (2) is arranged between the upper reactor (1) and the lower reactor (3), and the middle reactor (2) is interconnected and fixedly connected with the upper reactor (1) and the lower reactor (3); The upper reactor (1) comprises an upper end cap (11), wherein a distributor (12) for making the acetone solution and hydrogen contact evenly, a structured filler (13) and a honeycomb structure (14) are arranged inside the upper end cap (11), wherein the structured filler (13) is arranged between the distributor (12) and the honeycomb structure (14), a hydrogen feed pipe (15) connected to the interior of the upper end cap (11) is arranged at the top of the upper end cap (11), and an acetone feed pipe (16) connected to the interior of the upper end cap (11) is penetrated through the side wall of the upper end cap (11), and the acetone feed pipe (16) is located above the distributor (12); The middle stage reactor (2) is provided with a catalyst tube (21) for filling a catalyst; A discharge pipe (38) is provided at the bottom of the lower reactor (3).

2. The acetone hydrogenation reactor according to claim 1, characterized in that: The distributor (12) comprises a bottom plate (121) and a plurality of downcomers (122) uniformly arranged on the bottom plate (121); the bottom plate (121) is arranged on the inner wall and is located between the structured filler (13) and the acetone feed pipe (16); each of the downcomers (122) is vertically penetrated and fixedly connected to a side of the bottom plate (121) away from the structured filler (13); one end of each of the downcomers (122) close to the acetone feed pipe (16) is flush with each other, and one end of each of the downcomers (122) away from the acetone feed pipe (16) protrudes from the bottom plate (121); A supporting ring plate (123) for supporting the bottom plate (121) is arranged on the inner side wall of the upper sealing head (11); the bottom plate (121) abuts against the supporting ring plate (123) and is detachably connected to the supporting ring plate (123).

3. The acetone hydrogenation reactor according to claim 2, characterized in that: A plurality of reinforcing members (124) for supporting the bottom plate (121) are also provided on the inner wall of the upper head (11); each of the reinforcing members (124) is circumferentially arranged and fixedly connected to the inner wall of the upper head (11); each of the reinforcing members (124) abuts against an edge of the bottom plate (121) close to the structured filler (13).

4. The acetone hydrogenation reactor according to claim 2, characterized in that: A plurality of tear holes (1221) are provided on the upper wall of each downcomer (122) for allowing the acetone solution to flow into the downcomer.

5. The acetone hydrogenation reactor according to claim 2, characterized in that: The structured filler (13) is located below the bottom plate (121) to receive the acetone solution flowing down from the downcomer (122); a side of the structured filler (13) away from the bottom plate (121) abuts against the honeycomb structure (14); a plurality of through holes (131) for the acetone solution to pass through are provided on the structured filler (13); and corrugated structures (132) for evenly distributing the acetone solution are provided on both sides of the structured filler (13).

6. The acetone hydrogenation reactor according to claim 5, characterized in that: The number of the structured packings (13) is at least two, two adjacent structured packings (13) are arranged parallel to each other and stacked side by side up and down, and the corrugated structures (132) on the two adjacent structured packings (13) are perpendicular to each other and abut against each other.

7. The acetone hydrogenation reactor according to claim 1, characterized in that: The honeycomb structure (14) comprises a mounting plate (141) and a plurality of prismatic tubes (142), the mounting plate (141) being evenly provided with a plurality of flow holes (1411), each of the prismatic tubes (142) being vertically arranged and fixedly connected to the mounting plate (141) and corresponding one to one with the position of each of the flow holes (1411), the side walls of adjacent prismatic tubes (142) being in contact with each other and forming a honeycomb shape together, and the end of the prismatic tube (142) away from the mounting plate (141) being in contact with the structured filler (13); The number of the catalytic tubes (21) in the middle section reactor (2) is several, and each of the catalytic tubes (21) is arranged below the mounting plate (141) and corresponds one-to-one to each of the flow holes (1411).

8. The acetone hydrogenation reactor according to claim 7, characterized in that: The middle section reactor (2) is provided with a first flower plate (22) and a second flower plate (23) for mounting the catalytic tube (21); the first flower plate (22) is located at the upper part of the middle section reactor (2) and is in contact with the mounting plate (141); the second flower plate is located at the lower part of the middle section reactor (2); the first flower plate (22) and the second flower plate (23) are parallel to each other and are fixedly connected to the inner wall of the middle section reactor (2); the first flower plate (22) and the second flower plate (23) are both provided with a plurality of mounting holes (24) for inserting the catalytic tubes (21); the catalytic tubes (21) are vertically inserted into the mounting holes (24) and are fixedly connected to the flower plates; and the catalytic tubes (21) are interconnected with the upper section reactor (1) and the lower section reactor.

9. The acetone hydrogenation reactor according to claim 8, characterized in that: A wedge-shaped screen (32) is arranged in the lower reactor (3), and the wedge-shaped screen (32) is located below the second flower plate (23) and a gap is left between the wedge-shaped screen (32) and the second flower plate (23) for temporary storage of catalyst. An I-beam frame (33) for supporting the wedge-shaped screen (32) is fixedly connected to the inner wall of the lower reactor (3), and the I-beam frame (33) is abutted against the bottom of the wedge-shaped screen (32).

10. The acetone hydrogenation reactor according to claim 2, characterized in that: The acetone feed pipe (16) comprises a penetration pipe (161) and at least two branch pipes (162); the penetration pipe (161) is passed through and fixedly connected to the side wall of the upper head (11); the penetration pipe (161) is located above the downcomer (122); each of the branch pipes (162) is integrally connected to one end of the penetration pipe (161) located inside the upper head (11); each of the branch pipes (162) extends away from the end connected to the penetration pipe (161) to the gap between adjacent downcomers (122).

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