A fixed-bed reactor

Abstract

This utility model discloses a fixed-bed reactor device, relating to the field of fixed-bed reaction technology. It includes a mounting base, with a fixed-bed reactor symmetrically fixedly connected inside the mounting base. A replacement mechanism is provided on the outside of the fixed-bed reactor. The replacement mechanism includes a lifting component and a reaction component, which cooperate with each other. The lifting component includes a reactant storage box, which is slidably connected inside the fixed-bed reactor. Connecting rods are symmetrically fixedly connected inside both fixed-bed reactors, and the bottoms of both connecting rods are fixedly connected to the top of the reactant storage box. This fixed-bed reactor device, through its replacement mechanism, allows for rapid catalyst replacement without shutting down and disassembling the fixed-bed reactor, greatly improving production efficiency, ensuring the smooth progress of the reaction process, and featuring a simple structure and strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of fixed-bed reaction technology, and in particular to a fixed-bed reaction device. Background Technology

[0002] Valprolactone is an important bio-based platform compound widely used in the synthesis of fuel additives, solvents, fragrances, and polymer materials. Its synthesis typically involves the acid-catalyzed hydrogenation reduction of furfural or levulinic acid, a process involving high temperature, high pressure, and the use of a catalyst.

[0003] Fixed-bed reactors are commonly used for the synthesis of valerolactone due to their high efficiency in mass and heat transfer. Currently, most fixed-bed reactors for valerolactone synthesis use a fixed-bed catalyst packing method, where the catalyst is directly loaded into the fixed-bed reactor to catalyze the reaction. However, there is still considerable room for optimization in the existing technology regarding catalyst replacement and the continuity of the reaction process.

[0004] Based on the aforementioned technologies, the applicant believes that after catalyst deactivation, the fixed-bed reactor needs to be shut down and disassembled for replacement, resulting in reduced production efficiency. In response to the above problems, we have introduced a fixed-bed reactor device. Utility Model Content

[0005] This utility model discloses a fixed-bed reactor, which aims to solve the technical problem that the fixed-bed reactor needs to be shut down and disassembled after the catalyst is deactivated in order to replace it, resulting in a reduction in production efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fixed-bed reactor apparatus includes a mounting base. A fixed-bed reactor is symmetrically fixedly connected inside the mounting base. A replacement mechanism is provided on the outside of each fixed-bed reactor. The replacement mechanism includes a lifting assembly and a reaction assembly, which cooperate with each other. The lifting assembly includes a reactant storage box, which is slidably connected inside the fixed-bed reactor. Connecting rods are symmetrically fixedly connected inside each of the two fixed-bed reactors. The bottoms of the two connecting rods are fixedly connected to the tops of the reactant storage boxes. Sealing plates are fixedly connected to the tops of the connecting rods. Sealing covers are fixedly connected to the tops of the two sealing plates. Vertical plates are fixedly connected to the tops of the two sealing covers. Lifting plates are fixedly connected to the sides of the two vertical plates that are close to each other. Fixed plates are fixedly connected to the ends of the two lifting plates that are close to each other. A multi-section cylinder is fixedly connected to the top of the mounting base, located between the two fixed-bed reactors. A connecting plate is fixedly connected to the telescopic end of the multi-section cylinder, and the top of the connecting plate is fixedly connected to the bottom of the fixed plate.

[0008] The catalyst can be quickly replaced without shutting down and disassembling the fixed-bed reactor, which greatly improves production efficiency, ensures the smooth progress of the reaction process, and has a simple structure and strong practicality.

[0009] In a preferred embodiment, the reaction assembly includes stabilizing plates symmetrically fixedly connected to the top of the mounting base. Exhaust pipes are fixedly connected inside both stabilizing plates, with their ends extending into the interior of the fixed-bed reactor. Liquid outlet pipes are fixedly connected to the sides of both fixed-bed reactors, and the exhaust pipes and liquid outlet pipes cooperate with each other. Heating wires are fitted onto the outer sides of both fixed-bed reactors, and heat dissipation holes for heat dissipation are equidistantly opened on both sides of the mounting base.

[0010] The reaction assembly optimizes the stability and continuity of the reaction process. The stabilizing plate fixes the exhaust pipe and liquid outlet pipe to ensure efficient discharge of reaction gases and liquids. The heating wire provides uniform heating, and the heat dissipation holes improve heat dissipation efficiency, making the reaction temperature controllable and improving reaction efficiency and product purity.

[0011] In a preferred embodiment, two fixed-bed reactors are symmetrically fixedly connected to fixed blocks on their sides that are close to each other, and two fixed blocks on the same side are symmetrically fixedly connected to sliding rods, which are slidably connected to connecting plates.

[0012] The combination of the fixing block and the sliding rod enhances the sliding stability of the connecting plate, making the lifting process smoother and preventing the reactant storage box from shifting during movement, thus ensuring the accuracy and safety of the replacement operation.

[0013] In a preferred embodiment, support blocks are symmetrically fixedly connected inside both of the fixed-bed reactors and below the reactant storage boxes.

[0014] The support block is placed below the reactant storage box to provide support and prevent the reactant storage box from sinking due to gravity or vibration, ensuring that the catalyst maintains a stable position during the reaction and improving the controllability of the reaction.

[0015] In a preferred embodiment, both of the fixed-bed reactors have transparent observation windows on their front sides.

[0016] The transparent observation window facilitates real-time monitoring of the catalyst status and reaction process within the fixed-bed reactor, reducing unnecessary downtime for inspections and improving operational convenience and visual management of the reaction.

[0017] In a preferred embodiment, a controller is fixedly connected to the outside of one of the two fixed-bed reactors, and the multi-section cylinder and heating wire are electrically connected to the controller.

[0018] The controller integrates control of multiple cylinders and heating wires, enabling automated adjustment of catalyst replacement and reaction temperature, improving the intelligence of the equipment, reducing the need for manual intervention, and enhancing overall production efficiency.

[0019] The fixed-bed reactor provided by this utility model has the following advantages:

[0020] Firstly, the catalyst can be quickly replaced through the replacement mechanism, without having to shut down and disassemble the fixed-bed reactor, which greatly improves production efficiency, ensures the smooth progress of the reaction process, and has a simple structure and strong practicality.

[0021] Secondly, the cooperation between the fixing block and the sliding rod enhances the sliding stability of the connecting plate, making the lifting process smoother and preventing the reactant storage box from shifting during movement, thus ensuring the accuracy and safety of the replacement operation. The support block, located below the reactant storage box, provides support and prevents the box from sinking due to gravity or vibration, ensuring the catalyst remains in a stable position during the reaction and improving reaction controllability. The transparent observation window facilitates real-time monitoring of the catalyst status and reaction progress within the fixed-bed reactor, reducing unnecessary downtime for inspection and improving operational convenience and visual management of the reaction. The controller integrates control of multiple cylinders and heating wires, enabling automated adjustment of catalyst replacement and reaction temperature, increasing the intelligence of the unit, reducing the need for manual intervention, and improving overall production efficiency. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a fixed-bed reaction device proposed in this utility model.

[0023] Figure 2 This is a three-dimensional cross-sectional schematic diagram of a fixed-bed reaction device proposed in this utility model.

[0024] Figure 3 This is a front cross-sectional view of a fixed-bed reaction device proposed in this utility model.

[0025] Figure 4 This is a three-dimensional schematic diagram of a replacement mechanism for a fixed-bed reaction device proposed in this utility model.

[0026] In the attached diagram: 1. Mounting base; 2. Fixed bed reactor; 31. Reagent storage box; 32. Connecting rod; 33. Sealing plate; 34. Sealing cover; 35. Vertical plate; 36. Lifting plate; 37. Support block; 38. Fixing plate; 41. Stabilizing plate; 42. Exhaust pipe; 43. Liquid outlet pipe; 5. Fixing block; 6. Sliding rod; 7. Connecting plate; 8. Multi-section cylinder; 9. Heating wire; 10. Heat dissipation hole; 11. Observation window; 12. Controller. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] The fixed-bed reactor disclosed in this utility model is mainly used in fixed-bed reaction scenarios.

[0029] Reference Figures 1-4 A fixed-bed reactor apparatus includes a mounting base 1, with fixed-bed reactors 2 symmetrically fixedly connected inside the mounting base 1. A replacement mechanism is provided on the outside of the fixed-bed reactors 2. The replacement mechanism includes a lifting component and a reaction component, which cooperate with each other. The lifting component includes a reactant storage box 31, which is slidably connected inside the fixed-bed reactors 2. Connecting rods 32 are symmetrically fixedly connected inside both fixed-bed reactors 2, with the bottom of each connecting rod 32 fixedly connected to the top of the reactant storage box 31. A sealing plate 33 is fixedly connected to the top of the rod 32. A sealing cover 34 is fixedly connected to the top of each of the two sealing plates 33. A vertical plate 35 is fixedly connected to the top of each of the two sealing covers 34. A lifting plate 36 is fixedly connected to the side of each of the two vertical plates 35 that is close to each other. A fixing plate 38 is fixedly connected to the end of each of the two lifting plates 36 that is close to each other. A multi-section cylinder 8 is fixedly connected to the top of the mounting base 1 and located between the two fixed bed reactors 2. A connecting plate 7 is fixedly connected to the telescopic end of the multi-section cylinder 8. The top of the connecting plate 7 is fixedly connected to the bottom of the fixing plate 38. The reaction assembly includes a stabilizing plate 41, which is symmetrically fixedly connected to the top of the mounting base 1. An exhaust pipe 42 is fixedly connected inside each of the two stabilizing plates 41. The ends of the two exhaust pipes 42 that are close to each other extend into the interior of the fixed bed reactor 2. An outlet pipe 43 is fixedly connected to the side of the two fixed bed reactors 2 that are close to each other. The exhaust pipe 42 and the outlet pipe 43 cooperate with each other. An electric heating wire 9 is sleeved on the outside of each of the two fixed bed reactors 2. Heat dissipation holes 10 for heat dissipation are opened at equal intervals on both sides of the mounting base 1.

[0030] In this embodiment: Before the reaction, the catalyst is pre-loaded in a liftable reactant storage box. Then, the reactants are placed into the fixed-bed reactor, where a hydrogenation reduction reaction occurs under the heating of the heating wire and the action of the catalyst to generate the target product. When the catalyst is deactivated and needs to be replaced, the controller 12 activates the multi-section cylinder 8, which pushes the connecting plate 7 to raise the fixed plate 38, the lifting plate 36, the vertical plate 35, and the sealing cover 34 as a whole. This allows the reactant storage box 31 to slide smoothly out of the fixed-bed reactor 2 along the connecting rod 32. The operator can check the catalyst status and complete the replacement through the transparent observation window 11. The entire process does not require disassembling the fixed-bed reactor 2, greatly reducing downtime. After replacing the catalyst, the multi-section cylinder 8 retracts, and the reactant storage box 31 re-enters the reaction position. The sealing plate 33 and the sealing cover 34 ensure the airtightness of the reaction system. Through the replacement mechanism, the catalyst can be replaced quickly without stopping and disassembling the fixed-bed reactor 2, greatly improving production efficiency and ensuring the smooth progress of the reaction process. The structure is simple and highly practical.

[0031] In the above technical solution, considering the problem that the fixed-bed reactor needs to be shut down and disassembled for replacement after catalyst deactivation, resulting in reduced production efficiency, the specific operation is as follows to solve this problem:

[0032] Reference Figures 1-4 In a preferred embodiment, two fixed-bed reactors 2 are symmetrically fixedly connected to each other on their adjacent sides by fixing blocks 5. Sliding rods 6 are symmetrically fixedly connected between the two fixing blocks 5 on the same side, and the sliding rods 6 and connecting plates 7 are slidably connected. Support blocks 37 are symmetrically fixedly connected inside the two fixed-bed reactors 2 and below the reactant storage box 31. A transparent observation window 11 is provided on the front of each of the two fixed-bed reactors 2. A controller 12 is fixedly connected to the outside of one of the two fixed-bed reactors 2, and the multi-section cylinder 8 and heating wire 9 are electrically connected to the controller 12.

[0033] In this embodiment, the cooperation between the fixing block 5 and the sliding rod 6 enhances the sliding stability of the connecting plate 7, making the lifting process smoother and preventing the reactant storage box 31 from shifting during movement, thus ensuring the accuracy and safety of the replacement operation. The support block 37, located below the reactant storage box 31, provides support and prevents the reactant storage box 31 from sinking due to gravity or vibration, ensuring the catalyst maintains a stable position during the reaction and improving reaction controllability. The transparent observation window 11 facilitates real-time monitoring of the catalyst status and reaction progress within the fixed-bed reactor 2, reducing unnecessary downtime for inspection and improving operational convenience and visual management of the reaction. The controller 12 integrates control of the multi-section cylinder 8 and the heating wire 9, enabling automated adjustment of catalyst replacement and reaction temperature, improving the intelligence of the device, reducing the need for manual intervention, and enhancing overall production efficiency.

[0034] Working principle: Before the reaction, the catalyst is pre-loaded in a liftable reactant storage box. Then, the reactants are placed into the fixed-bed reactor. Under the heating of the heating wire and the action of the catalyst, a hydrogenation reduction reaction occurs to generate the target product. The reactant storage box 31 in the fixed-bed reactor 2 is pre-loaded with the catalyst. After the heating wire 9 is energized, the fixed-bed reactor 2 is uniformly heated to make the reaction system reach the preset temperature. The reactants enter the fixed-bed reactor 2 from the feed port and undergo a hydrogenation reduction reaction to generate valproic acid under the action of the catalyst. During the reaction, the exhaust pipe 42 discharges the by-product gas in real time, while the liquid outlet pipe 43 discharges the reaction liquid product. When the catalyst is deactivated and needs to be replaced, the controller 12 starts the multi-section cylinder 8, which pushes the connecting plate 7 to drive the fixed plate 38. The lifting plate 36, vertical plate 35, and sealing cover 34 rise as a whole, allowing the reactant storage box 31 to slide smoothly out of the fixed bed reactor 2 along the connecting rod 32. The operator can check the catalyst status and complete the replacement through the transparent observation window 11. The entire process does not require disassembling the fixed bed reactor 2, greatly reducing downtime. After replacing the catalyst, the multi-section cylinder 8 retracts, and the reactant storage box 31 re-enters the reaction position. The sealing plate 33 and sealing cover 34 ensure the airtightness of the reaction system, and the support block 37 provides stable support, allowing the reaction to resume quickly. The controller 12 regulates the temperature and lifting action throughout the process, realizing automated operation and ensuring the high efficiency and continuity of the reaction. At the same time, the heat dissipation hole 10 effectively balances the temperature of the fixed bed reactor 2, improving the stability of equipment operation.

[0035] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A fixed bed reactor device comprising a mounting base (1), characterised in that: A fixed bed reactor (2) is symmetrically fixedly connected inside the mounting base (1). A replacement mechanism is provided on the outside of the fixed bed reactor (2). The replacement mechanism includes a lifting component and a reaction component, which are used in cooperation with each other. The lifting assembly includes a reactant storage box (31), which is slidably connected inside the fixed-bed reactor (2). Connecting rods (32) are symmetrically fixedly connected inside both fixed-bed reactors (2). The bottoms of both connecting rods (32) are fixedly connected to the top of the reactant storage box (31). A sealing plate (33) is fixedly connected to the top of each connecting rod (32). A sealing cover (34) is fixedly connected to the top of each sealing plate (33). Vertical plates (35) are fixedly connected to the top of each of the two vertical plates (35) and lifting plates (36) are fixedly connected to the side of each of the two lifting plates (36) that are close to each other. Fixed plates (38) are fixedly connected to the end of each of the two lifting plates (36) that are close to each other. A multi-section cylinder (8) is fixedly connected to the top of the mounting base (1) and between the two fixed bed reactors (2). A connecting plate (7) is fixedly connected to the telescopic end of the multi-section cylinder (8). The top of the connecting plate (7) is fixedly connected to the bottom of the fixed plate (38).

2. A fixed bed reactor according to claim 1, characterized in that: The reaction assembly includes a stabilizing plate (41), which is symmetrically fixedly connected to the top of the mounting base (1). Both stabilizing plates (41) are fixedly connected to an exhaust pipe (42). The ends of the two exhaust pipes (42) that are close to each other extend into the interior of the fixed bed reactor (2). The sides of the two fixed bed reactors (2) that are close to each other are fixedly connected to an outlet pipe (43). The exhaust pipe (42) and the outlet pipe (43) cooperate with each other. The outer sides of the two fixed bed reactors (2) are fitted with heating wires (9). The mounting base (1) has heat dissipation holes (10) at equal intervals on both sides for heat dissipation.

3. The fixed bed reactor of claim 1, wherein: Two fixed-bed reactors (2) are symmetrically fixedly connected to fixed blocks (5) on their sides, and two fixed blocks (5) on the same side are symmetrically fixedly connected to slide rods (6), and slide rods (6) and connecting plates (7) are slidably connected.

4. The fixed bed reactor of claim 1, wherein: Both of the fixed-bed reactors (2) are symmetrically fixed with support blocks (37) inside and below the reactant storage box (31).

5. The fixed bed reactor of claim 1, wherein: Both of the fixed-bed reactors (2) are provided with transparent observation windows (11) on the front.

6. The fixed bed reactor of claim 1, wherein: A controller (12) is fixedly connected to the outside of one of the two fixed-bed reactors (2), and the multi-section cylinder (8) and the heating wire (9) are electrically connected to the controller (12).

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