A fixed bed of catalyst for a hydrogenation reaction

Abstract

The utility model discloses a kind of hydrogenation reaction catalyst fixed bed, including motor, pivot, spiral blade, first net basket and second net basket, the pivot is connected in the bottom of the motor, the quantity of the first net basket is multiple, the first net basket is fan-shaped structure, multiple the first net basket is spaced apart in the outer periphery of the pivot along the axial direction of the pivot, and the projection of multiple the first net basket in the axial direction of the pivot does not overlap each other, the quantity of the second net basket is multiple, multiple the second net basket is one-to-one and detachably embedded in multiple the first net basket, catalyst packing is filled in the second net basket, the spiral blade is located in the bottom of the pivot, and multiple the first net basket is located below the spiral blade. The present technical solution is used to solve the problem that the existing hydrogenation reaction catalyst fixed bed has uneven catalyst distribution, reaction heat aggregation and catalyst replacement difficulty.

Description

Technical Field

[0001] This utility model belongs to the technical field of rosin processing equipment, specifically relating to a fixed bed of catalyst for hydrogenation reaction. Background Technology

[0002] Hydrogenation plays a crucial role in chemical production and is widely used in pharmaceuticals, petrochemicals, fine chemicals, and many other fields. For example, in some cases, rosin needs to be hydrogenated. Fixed-bed catalysts, as commonly used equipment in hydrogenation reactions, have a critical impact on reaction efficiency, product selectivity, and catalyst lifespan.

[0003] Currently, existing fixed-bed catalysts for hydrogenation reactions have many shortcomings:

[0004] Uneven catalyst distribution: Traditional fixed-bed catalysts struggle to ensure uniform catalyst distribution within the bed during loading. This is because the loading process often relies on manual operation or simple mechanical devices, making it impossible to precisely control the amount of catalyst packed at different locations. For example, the catalyst packing density may differ significantly between the edges and the center of the fixed bed, resulting in varying degrees of contact between the reactants and the catalyst as they flow through the bed. Materials at the edges may react incompletely due to insufficient catalyst, while the center may experience localized overheating due to excessive catalyst concentration, affecting product selectivity and reaction stability. Over long-term operation, this uneven reaction can also exacerbate localized catalyst deactivation, shortening the overall lifespan of the catalyst.

[0005] Difficulty in removing heat of reaction: Hydrogenation reactions are typically exothermic, releasing a significant amount of heat during the process. Existing fixed-bed structures have deficiencies in heat dissipation; their internal heat exchange devices are poorly designed and unable to remove heat of reaction effectively and promptly. When heat of reaction accumulates, it causes the bed temperature to rise, exceeding the optimal activity temperature range of the catalyst, thereby reducing catalyst activity and selectivity. For example, in some temperature-sensitive hydrogenation reactions, even small temperature fluctuations can lead to a significant decrease in product purity. Furthermore, excessively high temperatures can trigger side reactions, increasing impurity formation and further affecting product quality. To control temperature, traditional methods often require reducing the reaction feed rate, which undoubtedly reduces production efficiency.

[0006] Catalyst replacement is inconvenient: When catalyst deactivation requires replacement, the existing fixed-bed structure makes the replacement process cumbersome and complex. Some fixed beds have small catalyst loading ports, making it difficult to quickly and easily remove all deactivated catalyst. Furthermore, ensuring uniformity when reloading with new catalyst is also challenging. Additionally, the complex internal structure of some fixed beds requires disassembling numerous components to access the catalyst. This not only increases labor and time costs but may also damage the equipment during disassembly and reassembly, affecting its sealing and overall performance. Utility Model Content

[0007] To address the aforementioned technical problems, this invention provides a fixed catalyst bed for hydrogenation reactions, which solves the problems of uneven catalyst distribution, heat accumulation, and difficulty in catalyst replacement in existing fixed catalyst beds for hydrogenation reactions. This fixed catalyst bed for hydrogenation reactions can effectively improve the efficiency of hydrogenation reactions, product selectivity, and the operability and stability of the equipment.

[0008] The present invention provides a fixed bed of catalyst for hydrogenation reaction, comprising a motor, a rotating shaft, a helical blade, a first mesh basket, and a second mesh basket. The rotating shaft is connected to the bottom of the motor. There are multiple first mesh baskets, each with a fan-shaped structure. The multiple first mesh baskets are spaced apart along the axial direction of the rotating shaft on its outer periphery, and the projections of the multiple first mesh baskets on the axial direction of the rotating shaft do not overlap. There are multiple second mesh baskets, each corresponding to and detachably embedded in one of the multiple first mesh baskets. The second mesh baskets are filled with catalyst packing. The helical blade is located at the bottom of the rotating shaft, and the multiple first mesh baskets are located below the helical blade.

[0009] Furthermore, the plurality of first baskets are arranged at intervals in a spiral direction from the upper to the lower part of the rotating shaft.

[0010] Furthermore, both the first and second net baskets are metal net baskets.

[0011] This hydrogenation reaction uses a fixed catalyst bed with helical blades at the bottom of a rotating shaft. During rotation, this creates an upward flow of material. Simultaneously, by staggering multiple first mesh baskets axially and circumferentially, the shaft drives these baskets to rotate, improving the contact efficiency between the material and the catalyst packing, thus enhancing hydrogenation catalytic efficiency. This also improves heat conduction and avoids the problem of concentrated hydrogenation heat. To facilitate catalyst packing replacement, multiple second mesh baskets are provided. When replacing the catalyst packing, the second mesh baskets can be pre-filled with catalyst packing before being placed into the first mesh baskets, achieving rapid replacement. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of a fixed bed of catalysts for hydrogenation reactions. Detailed Implementation

[0014] This invention discloses a fixed catalyst bed for hydrogenation reactions, which can effectively improve the efficiency of hydrogenation reactions, product selectivity, and the operability and stability of the equipment.

[0015] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0016] See Figure 1 As shown, this utility model discloses a fixed bed of catalyst for hydrogenation reaction, including a motor 1, a rotating shaft 4, a helical blade 5, a first mesh basket 2 and a second mesh basket 3. The rotating shaft 4 is connected to the bottom of the motor 1. There are multiple first mesh baskets 2, each with a fan-shaped structure. The multiple first mesh baskets 2 are spaced apart along the axial direction of the rotating shaft 4 on its outer periphery, and the projections of the multiple first mesh baskets 2 on the axial direction of the rotating shaft 4 do not overlap. There are multiple second mesh baskets 3, each of which is detachably embedded in one of the multiple first mesh baskets 2. The second mesh baskets 3 are filled with catalyst packing. The helical blade 5 is located at the bottom of the rotating shaft 4, and the multiple first mesh baskets 2 are located below the helical blade 5.

[0017] Multiple first baskets 2 are arranged at intervals in a spiral direction from the upper to the lower part of the rotating shaft 4.

[0018] Both the first basket 2 and the second basket 3 are metal baskets.

[0019] The fixed catalyst bed for this hydrogenation reaction has helical blades 5 at the bottom of the rotating shaft 4. During the rotation of the shaft 4, an upward flow of material is generated. Simultaneously, by staggering multiple first mesh baskets 2 axially and circumferentially, the shaft 4 drives the multiple first mesh baskets 2 to rotate, thereby improving the contact efficiency between the material and the catalyst packing, increasing the hydrogenation catalytic efficiency, and also improving heat conduction, avoiding the problem of concentrated hydrogenation heat. To improve the convenience of catalyst packing replacement, multiple second mesh baskets 3 are provided. When replacing the catalyst packing, the second mesh baskets 3 can be pre-filled with catalyst packing before being placed into the first mesh baskets 2, thus achieving a rapid replacement effect.

[0020] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A fixed-bed catalyst for hydrogenation reaction, characterized in that, The device includes a motor, a rotating shaft, a helical blade, a first mesh basket, and a second mesh basket. The rotating shaft is connected to the bottom of the motor. There are multiple first mesh baskets, each with a fan-shaped structure. The multiple first mesh baskets are spaced apart along the axial direction of the rotating shaft on its outer periphery, and the projections of the multiple first mesh baskets on the axial direction of the rotating shaft do not overlap. There are also multiple second mesh baskets, each detachably embedded in one of the multiple first mesh baskets. The second mesh baskets are filled with catalyst filler. The helical blade is located at the bottom of the rotating shaft, and the multiple first mesh baskets are located below the helical blade.

2. A fixed-bed catalyst for hydrogenation reaction according to claim 1, characterized in that, Multiple first baskets are arranged at intervals in a spiral direction from the upper to the lower part of the rotating shaft.

3. A fixed-bed catalyst for hydrogenation reaction according to claim 1, characterized in that, Both the first and second net baskets are metal net baskets.

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