Replaceable filler type simple continuous flow microreactor device

Abstract

The utility model discloses a simple continuous flow microreactor device with replaceable packing. The simple continuous flow microreactor device comprises a liquid pipeline system, a gas pipeline system, a microreactor and a cooling and product collecting system, the micro-reactor is a filler type micro-reaction tube, the filler type micro-reaction tube comprises a tube body, the tube body is filled with a replaceable porous filler, and the porous filler has both a microporous structure and a mesoporous structure; filtering sieve plates for intercepting porous fillers with different sizes are respectively arranged at the upper end and the lower end of the pipe body, and are respectively connected with the material inlet and outlet joint through fixing pieces for stabilizing the fillers; a blade ring and a sealing ring are sequentially arranged between the fixing piece and the pipe body from top to bottom. The microreactor disclosed by the utility model is applied to preparation of amide compounds, and compared with a conventional microreactor, the microreactor disclosed by the utility model can obtain higher product yield.

Description

Technical Field

[0001] This utility model belongs to the field of fine chemical technology, specifically relating to a replaceable packing type continuous flow microreactor device. Background Technology

[0002] The poor mass and heat transfer performance of conventional reactors often necessitates high-temperature, high-pressure conditions and long reaction times (several hours or even tens of hours), which not only reduces production efficiency but also poses safety hazards. Furthermore, the difficulty in precisely controlling reaction conditions and the complex reaction networks further reduce reaction selectivity.

[0003] Conventional packed bed reactors typically use larger particles of packing material to fix the packing. However, fine-particle packing can easily cause excessive pressure drop and clogging. Packed microreactors, on the other hand, can use fine-particle packing and are less prone to clogging. Due to their size effect, packed microreactors offer a larger relative surface area, achieving a higher mass transfer coefficient and thus improving mass transfer efficiency. Conventional packed bed reactors, with their relatively smaller surface area of ​​packing material, have lower mass transfer efficiency than packed microreactors. Furthermore, compared to packed microreactors, conventional packed bed reactors also suffer from larger dead volumes and longer equilibrium times. Large dead volumes not only reduce reactor utilization but can also affect reaction uniformity and stability, potentially leading to unstable product quality. Long equilibrium times not only reduce production efficiency but can also increase energy consumption and operating costs.

[0004] Zhang Jisong invented a method for the continuous hydrogenation synthesis of 1,3-dimethyl-2-imidazol based on a series of microreactors in Chinese patent CN114394936A. This invention utilizes the high mixing efficiency and excellent mass and heat transfer performance of the microreactor, improving the heat transfer capacity of the reactor, significantly reducing the reactor volume, and increasing the reaction yield. Chen Guangwen invented an enlarged ultrasonic microreactor in Chinese patent CN117482866A. This invention introduces an ultrasonic sound field into the microreactor, with the ultrasonic transducer directly coupled and rigidly connected to the microreactor. Under the action of ultrasonic cavitation, mixing and mass transfer are significantly enhanced, and it can be used in processes such as extraction, emulsification, nanomaterial preparation, and chemical reactions. Luo Guangsheng invented an integrated microreactor for liquid-liquid heterogeneous exothermic reactions in Chinese patent CN114588850A. In this invention, a heat-conducting rotating cylinder is installed inside the microreactor shell, and a reaction gap is created between the reactor shell and the heat-conducting rotating cylinder. During the reaction, the separation between the two phases and the reaction of the reactants are integrated in the inner and outer regions of the heat-conducting rotating cylinder, respectively. The heat released by the reaction can be transferred from the inner to the outer side of the heat-conducting rotating cylinder in a timely and efficient manner, effectively improving the heat utilization rate during the reaction. Wang Feng invented a packed microchannel reactor in Chinese patent CN219964861U. The microchannel reactor of this invention includes an upper tank and a micro-reaction mechanism. The micro-reaction mechanism is located in the upper tank, and several microchannel plates and several groups of packing materials are alternately arranged in the outer frame assembly. The packing material is tightly pressed between two adjacent microchannel plates. The first support plate, the second support plate, and the limiting assembly are detachable, ensuring that when the packing material fails, it can be easily replaced with a new packing material, avoiding the failure of the microchannel plates and saving production costs.

[0005] Chinese patent document CN117398946A discloses a microchannel reactor, which includes a reaction module with multiple reaction chambers and multiple heat exchange chambers. Each reaction chamber has a heat exchange chamber on each of its left and right sides. The reaction module also has at least one material channel, with the same material channel communicating with at least two adjacent reaction chambers. However, this reactor has a complex structure, suffers from frequent and difficult reactor replacements, and is prone to clogging.

[0006] Many porous materials face challenges in industrial applications due to various factors, hindering their molding and limiting their use. For instance, the uneven structure and pore distribution of hierarchical porous materials can lead to deformation, cracking, or instability during molding. Furthermore, many porous materials lack structural strength, making them prone to breakage or deformation during post-processing. Additionally, the molding processes for some porous materials are complex, requiring high temperatures, pressures, or even more sophisticated techniques and equipment, making effective molding impossible under ordinary conditions. Moreover, the commonly used bonding molding methods in industry often clog the pore structure of porous materials, causing the loss or elimination of their porous properties. Therefore, packed microreactors capable of being filled with fine particles are needed to address these issues.

[0007] In summary, current microreactors have certain problems. Their microstructures are typically monolithic, leading to complex manufacturing processes and high costs. Furthermore, during use, blockages or increased pressure drops due to solids (particulate impurities or solids introduced by side reactions, such as easily crystallizing byproducts) are complex to clear, often rendering the reactor unusable and requiring the replacement of the entire structural component. In addition, frequent reactor replacements can easily cause blockages, especially since frequent replacements significantly increase reaction costs. Therefore, there is a need to optimize the design of a microreactor with easily adjustable and replaceable internal components to achieve more stable and sustainable operation. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the present invention aims to provide a simple continuous flow microreactor device with replaceable packing material, which solves the problems of frequent replacement, easy clogging, and high production costs of ordinary microreactors in the prior art, and is expected to improve the efficiency and selectivity of the reaction.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A replaceable packing type continuous flow microreactor device, characterized in that it includes a liquid pipeline system, a gas pipeline system, a microreactor, and a cooling and product collection system; the top of the microreactor is connected to both the liquid pipeline system and the gas pipeline system, and the bottom of the microreactor is connected to the cooling and product collection system; wherein:

[0011] The microreactor is a packed microreactor tube, which includes a tube body filled with replaceable porous packing material, which has both microporous and mesoporous structures. Filter screens for trapping porous packing material of different sizes are respectively provided at the upper and lower ends of the tube body. The filter screens at both ends are connected to material inlet / outlet connectors via fixing components to stabilize the packing material. A cutting edge ring and a sealing ring are sequentially arranged between the fixing components and the tube body from top to bottom.

[0012] Furthermore, the size of the holes in the filter screen plate is adjustable.

[0013] Furthermore, the inner diameter of the tube is 0.1-10 mm.

[0014] Furthermore, the inner diameter of the tube can be one of 0.25 mm, 0.32 mm, 0.53 mm, 2.1 mm, 3.0 mm or 4.6 mm.

[0015] Furthermore, the particle size range of the porous filler is 0.1-1000 micrometers.

[0016] Furthermore, the fastener is a connecting screw.

[0017] Furthermore, the liquid piping system includes a raw material tank and a feed pump connected via a liquid pipeline, and the feed pump is connected to the top of the microreactor via the liquid pipeline.

[0018] Furthermore, the gas pipeline system includes a gas cylinder and a gas flow meter, which are connected by a gas pipeline, and the gas flow meter is connected to the top of the microreactor via the gas pipeline.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. Conventional fixed-bed reactors can only be filled with large-particle packing, while the replaceable-packing simple continuous flow microreactor of this invention can be filled with small-particle powder.

[0021] 2. The microreactor of this invention has low requirements for the mechanical strength of the packing material.

[0022] 3. The microreactor of this utility model can be updated by replacing the packing material.

[0023] 4. Different sizes of particle packing material in the microreactor of this utility model can be used in combination.

[0024] 5. The microreactor of this invention has low cost.

[0025] 6. The microreactor device of this invention is applied to the preparation of amide compounds, and can achieve a higher product yield compared with conventional microreactors. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the packing-type microreactor described in this utility model. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the packing-type microreactor described in this utility model. Figure 2 ;

[0028] Figure 3 This is an enlarged schematic diagram of the connecting screws and filter in the microreactor structure;

[0029] Figure 4 This is an overall schematic diagram of the replaceable packing type continuous flow microreactor device described in this utility model.

[0030] The accompanying diagrams are labeled as follows:

[0031] 1-Liquid piping system; 2-Gas piping system; 3-Microreactor; 4-Cooling and product collection system; 11-Raw material tank; 12-Feed pump; 21-Gas cylinder; 22-Gas flow meter; 31-Pipe body; 32-Porous packing; 33-Filter sieve plate; 34-Material inlet / outlet connector; 35-Fixed component; 36-Blade ring; 37-Sealing ring. Detailed Implementation

[0032] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0034] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0035] refer to Figures 1 to 4 This utility model provides a replaceable packing type continuous flow microreactor device, including a liquid pipeline system 1, a gas pipeline system 2, a microreactor 3, and a cooling and product collection system 4; the top of the microreactor 3 is connected to the liquid pipeline system 1 and the gas pipeline system 2 respectively, and the bottom of the microreactor 3 is connected to the cooling and product collection system 4; wherein:

[0036] The microreactor 3 is a packed microreactor tube, which includes a tube body 31. The tube body 31 is filled with replaceable porous packing material 32, which has both microporous and mesoporous structures. The upper and lower ends of the tube body 31 are respectively provided with filter screen plates 33 for retaining porous packing material of different sizes. The filter screen plates 33 at both ends are respectively connected to the material inlet / outlet connector 34 through fixing parts 35 to stabilize the packing material. A blade ring 36 and a sealing ring 37 are arranged between the fixing part 35 and the tube body 31 from top to bottom.

[0037] In one embodiment, the aperture size of the filter screen 33 plate is adjustable.

[0038] In one embodiment, the inner diameter of the tube 31 is 0.1-10 mm.

[0039] In one embodiment, the inner diameter of the tube 31 may be one of 0.25 mm, 0.32 mm, 0.53 mm, 2.1 mm, 3.0 mm or 4.6 mm.

[0040] In one embodiment, the porous filler 32 has a particle size range of 0.1-1000 micrometers.

[0041] In one embodiment, the fastener 35 is a connecting screw.

[0042] In one embodiment, the liquid pipeline system 1 includes a raw material tank 11 and a feed pump 12 connected by a liquid pipeline, and the feed pump 12 is connected to the top of the microreactor 3 by a liquid pipeline.

[0043] In one embodiment, the gas pipeline system 2 includes a gas cylinder 21 and a gas flow meter 22, which are connected by a gas pipeline and the gas flow meter 22 is connected to the top of the microreactor 3 through the gas pipeline 2.

[0044] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A simple continuous flow microreactor device with replaceable packing, characterized in that, It includes a liquid piping system, a gas piping system, a microreactor, and a cooling and product collection system; the top of the microreactor is connected to both the liquid piping system and the gas piping system, and the bottom of the microreactor is connected to the cooling and product collection system; wherein: The microreactor is a packed microreactor tube, which includes a tube body filled with replaceable porous packing material, which has both microporous and mesoporous structures. Filter screens for trapping porous packing material of different sizes are respectively provided at the upper and lower ends of the tube body. The filter screens at both ends are connected to material inlet / outlet connectors via fixing components to stabilize the packing material. A cutting edge ring and a sealing ring are sequentially arranged between the fixing components and the tube body from top to bottom.

2. The replaceable packing type simple continuous flow microreactor device as described in claim 1, characterized in that, The size of the holes in the filter screen plate is adjustable.

3. The replaceable packing type simple continuous flow microreactor device as described in claim 1, characterized in that, The inner diameter of the tube is 0.1-10 mm.

4. The replaceable packing type simple continuous flow microreactor device as described in claim 3, characterized in that, The inner diameter of the tube can be one of 0.25 mm, 0.32 mm, 0.53 mm, 2.1 mm, 3.0 mm or 4.6 mm.

5. The replaceable packing type simple continuous flow microreactor device as described in claim 1, characterized in that, The particle size range of the porous filler is 0.1-1000 micrometers.

6. The replaceable packing type simple continuous flow microreactor device as described in claim 1, characterized in that, The fastener is a connecting screw.

7. The replaceable packing type simple continuous flow microreactor device as described in claim 1, characterized in that, The liquid piping system includes a raw material tank and a feed pump, which are connected by a liquid pipeline, and the feed pump is connected to the top of the microreactor via the liquid pipeline.

8. The replaceable packing type simple continuous flow microreactor device as described in claim 1, characterized in that, The gas pipeline system includes a gas cylinder and a gas flow meter, which are connected by a gas pipeline, and the gas flow meter is connected to the top of the microreactor via the gas pipeline.

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