Vertical pipe type intermittent reaction device with porous baffle for solid-liquid phase reaction

Abstract

The utility model relates to the technical field of chemical production, in particular to a vertical pipe type intermittent reaction device with a porous baffle for solid-liquid phase reaction, which comprises an upper material guide cover plate, an internal circulation reaction pipe and an external circulation reaction pipe, and the internal circulation reaction pipe comprises an upper-layer porous baffle, an internal circulation reaction side plate, a round hole lower plate and a lower-layer porous baffle; the upper-layer perforated baffle plate is arranged, so that catalyst solids or reactants caused by reaction in the internal circulation reaction tube or rising of gas input by the upper material guide cover plate in a solution are prevented from rushing out, and the reactants and the catalyst solids react in the internal circulation reaction tube defined by the internal circulation reaction side plates; the lower-layer baffle with holes intercepts most of coarse-grain reactants and solid catalyst particles through fine small holes and prevents the coarse-grain reactants and the solid catalyst particles from flowing out along with the reactants, so that screened reaction products finally flow to the outer circulation reaction pipe through the circular-hole lower plate, and the outer circulation reaction pipe is used for guiding out reactants in the inner circulation reaction side plate.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, and in particular to a vertical tube batch reaction device with porous baffles for solid-liquid phase reactions. Background Technology

[0002] Traditional vertical continuous solid-liquid phase reactors are mainly designed for liquid-liquid systems. Their structure is difficult to effectively adapt to the requirements of solid-liquid phase reactions involving solid catalysts. They have core problems such as easy catalyst loss with the liquid phase, insufficient renewal of the solid-liquid contact interface leading to low mass transfer efficiency, and mismatch between the fluid dynamics characteristics and catalyst characteristics within the reactor.

[0003] While existing technologies can partially mitigate catalyst loss by adding filtration modules or adjusting the agitator structure, they easily lead to uneven flow field distribution within the reactor, causing localized catalyst agglomeration or excessive wear. Improving mass transfer efficiency through optimized flow channel design requires complex three-dimensional flow field simulation and high-precision processing, significantly increasing equipment costs. Furthermore, traditional reactors often employ fixed geometric parameters, making it difficult to optimize them based on the particle size distribution, density differences, and activity characteristics of different catalysts. This can result in low catalyst utilization in high-value-added processes involving heterogeneous catalysis and nanomaterial synthesis. Utility Model Content

[0004] The purpose of this invention is to provide a vertical tube intermittent reaction device with porous baffles for solid-liquid phase reactions, which aims to solve the problem that traditional liquid-liquid phase reaction devices cannot effectively intercept solid catalyst particles, resulting in catalyst loss and low utilization due to catalyst loss caused by the catalyst flowing out with the reaction stream.

[0005] To achieve the above objectives, this utility model provides a vertical tube batch reaction device with porous baffles for solid-liquid phase reactions, including an upper material guide cover, an inner circulation reaction tube, and an outer circulation reaction tube. The inner circulation reaction tube is assembled inside the outer circulation reaction tube, and the upper material guide cover is assembled at the top of the inner circulation reaction tube. The inner circulation reaction tube includes an upper perforated baffle, an inner circulation reaction side plate, a lower perforated plate, and a lower perforated baffle. The lower perforated plate is fixedly connected to the inner circulation reaction side plate and is located at the bottom of the inner circulation reaction side plate. The lower perforated baffle is fixedly connected to the inner circulation reaction side plate and is located on the side of the inner circulation reaction side plate near the lower perforated baffle. The upper perforated baffle is fixedly connected to the inner circulation reaction side plate and is located at the top of the inner circulation reaction side plate.

[0006] The upper material guide cover includes an air pump input pipe, a material conveying thin pipe, a thin pipe vertical displacement control device, and a cover plate. The cover plate is assembled on the top of the inner circulation reaction side plate. The thin pipe vertical displacement control device is fixedly connected to the cover plate and located on the top of the cover plate. The air pump input pipe communicates with and passes through the thin pipe vertical displacement control device. The cover plate has pressure relief and exhaust holes located around the pressure relief and exhaust holes. The material conveying thin pipe communicates with the cover plate and is located around the thin pipe vertical displacement control device.

[0007] The feeding capillary tube has 6 sections.

[0008] The pressure relief and venting ports have six locations.

[0009] The external circulation reaction tube includes a base plate, an external circulation reaction side plate, and a guide pipe. The external circulation reaction side plate is sleeved on the outside of the internal circulation reaction side plate. The base plate is fixedly connected to the external circulation reaction side plate and is located at the bottom of the external circulation reaction side plate. The guide pipe is connected to the external circulation reaction side plate and is located on one side of the external circulation reaction side plate.

[0010] This invention relates to a perforated vertical tube batch reaction device with porous baffles for solid-liquid phase reactions. The upper material guide cover is used to introduce reactants and catalyst into the inner circulation reaction tube and to discharge the gas generated during the reaction. The upper perforated baffle prevents catalyst solids or reactants from being ejected from the inner circulation reaction tube due to the rising of gas generated during the reaction or introduced through the upper material guide cover. The reactants and catalyst solids react within the inner circulation reaction tube enclosed by the inner circulation reaction side plates. The lower perforated baffle uses tiny holes to physically intercept most of the coarse reactant and solid catalyst particles, preventing them from flowing out with the reaction stream and allowing the reaction products to be screened out. The reaction products ultimately flow through the perforated lower plate to the outer circulation reaction tube, which is used for... The reactants are discharged from the internal circulation reaction side plate. This reaction device, by adding the upper and lower perforated baffles, achieves precise interception of solid catalyst particles, preventing catalyst loss with the reactants and ensuring its continuous participation in the reaction within the device. This significantly improves catalyst utilization and reduces process costs. It can promote liquid-phase turbulence, enhance mass exchange at the solid-liquid interface, overcome the bottleneck of low mass transfer efficiency in traditional liquid-liquid phase reaction devices, increase the reaction rate, effectively suppress catalyst agglomeration and deposition, maintain a uniform solid-liquid dispersion state within the reaction device, reduce side reactions, improve product selectivity, and significantly enhance process repeatability and stability. This solves the problem that traditional liquid-liquid phase reaction devices cannot effectively intercept solid catalyst particles, leading to catalyst loss and low utilization due to catalyst loss with the reactants. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0012] Figure 1 This is a schematic diagram of the structure of a vertical tube batch reaction device with porous baffles for solid-liquid phase reaction according to this utility model.

[0013] Figure 2 This is a cross-sectional view of a vertical tube batch reaction device with porous baffles for solid-liquid phase reaction according to this utility model.

[0014] In the diagram: 1-Air pump input pipe, 2-Feeding thin pipe, 3-Pressure relief and exhaust hole, 4-Guide pipe, 5-Upper perforated baffle, 6-Internal circulation reaction side plate, 7-Round hole lower plate, 8-Lower perforated baffle, 9-Bottom plate, 10-Cover plate, 11-Thin pipe vertical displacement control device, 12-External circulation reaction side plate. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0016] Please see Figures 1 to 2 This utility model provides a perforated vertical tube reactor with porous baffles for solid-liquid phase reactions, including an upper material guide cover, an inner circulation reaction tube, and an outer circulation reaction tube. The inner circulation reaction tube is assembled inside the outer circulation reaction tube, and the upper material guide cover is assembled at the top of the inner circulation reaction tube. The inner circulation reaction tube includes an upper perforated baffle 5, an inner circulation reaction side plate 6, a lower perforated plate 7, and a lower perforated baffle 8. The lower perforated plate 7 is fixedly connected to the inner circulation reaction side plate 6 and is located at the bottom of the inner circulation reaction side plate 6. The lower perforated baffle 8 is fixedly connected to the inner circulation reaction side plate 6 and is located on the side of the inner circulation reaction side plate 6 near the lower perforated baffle 8. The upper perforated baffle 5 is fixedly connected to the inner circulation reaction side plate 6 and is located at the top of the inner circulation reaction side plate 6.

[0017] In this embodiment, the upper material guide cover is used to introduce reactants and catalyst into the inner circulation reaction tube and discharge the gas generated by the reaction. The upper perforated baffle 5 is provided to prevent solid catalyst or reactants from being rushed out of the inner circulation reaction tube due to the reaction or the rising of gas in the solution caused by the gas introduced by the upper material guide cover. The reactants and solid catalyst react in the inner circulation reaction tube surrounded by the inner circulation reaction side plate 6. The lower perforated baffle 8 uses fine holes to physically intercept most of the coarse reactant and solid catalyst particles, preventing them from flowing out with the reaction stream, thus screening out the reaction products. The reaction products finally flow through the lower perforated plate 7 to the outer circulation reaction tube, which is used to discharge the inner circulation reaction side plate 6. The reaction device, by adding the upper perforated baffle 5 and the lower perforated baffle 8, achieves precise interception of solid catalyst particles, preventing catalyst loss with the reactants and ensuring its continuous participation in the reaction within the device. This significantly improves catalyst utilization and reduces process costs. It can promote liquid-phase turbulence, enhance mass exchange at the solid-liquid interface, overcome the bottleneck of low mass transfer efficiency in traditional liquid-liquid phase reaction devices, increase the reaction rate, effectively suppress catalyst agglomeration and deposition, maintain a uniform solid-liquid dispersion state within the reaction device, reduce side reactions, improve product selectivity, and significantly enhance process repeatability and stability. This solves the problem that traditional liquid-liquid phase reaction devices cannot effectively intercept solid catalyst particles, leading to catalyst loss and low utilization due to catalyst loss with the reactants.

[0018] Furthermore, the upper material guide cover includes an air pump input pipe 1, a material conveying thin pipe 2, a thin pipe vertical displacement control device 11, and a cover plate 10. The cover plate 10 is assembled on the top of the inner circulation reaction side plate 6. The thin pipe vertical displacement control device 11 is fixedly connected to the cover plate 10 and is located on the top of the cover plate 10. The air pump input pipe 1 communicates with the thin pipe vertical displacement control device 11 and passes through the thin pipe vertical displacement control device 11. The cover plate 10 has a pressure relief vent 3, which is located around the pressure relief vent 3. The material conveying thin pipe 2 communicates with the cover plate 10 and is located around the thin pipe vertical displacement control device 11.

[0019] In this embodiment, the gas pump input pipe 1 directly introduces gas into the inner circulation reaction pipe to accelerate the catalysis of the catalyst. Four feed pipes 2 are distributed around the vertical displacement control device 11, directly delivering the materials to be reacted, such as phosphorus-containing wastewater, to the inner circulation reaction pipe. Six pressure relief and exhaust ports 3 are directly distributed on the cover plate 10, used to discharge the gas generated during the reaction and also to add monitoring devices, such as pH detectors. The vertical displacement control device 11 is located in the center of the cover plate 10. The vertical height of the gas pump input pipe 1 is adjusted by adjusting the screws on it to better deliver gas to the catalyst for sufficient reaction. The cover plate 10 is fixed to the outer circulation reaction pipe with screws to prevent it from falling off.

[0020] Furthermore, the external circulation reaction tube includes a base plate 9, an external circulation reaction side plate 12, and a guide pipe 4. The external circulation reaction side plate 12 is sleeved on the outside of the internal circulation reaction side plate 6. The base plate 9 is fixedly connected to the external circulation reaction side plate 12 and is located at the bottom of the external circulation reaction side plate 12. The guide pipe 4 is connected to the external circulation reaction side plate 12 and is located on one side of the external circulation reaction side plate 12.

[0021] In this embodiment, the base plate 9 provides installation conditions for the external circulation reaction side plate 12, which surrounds the outer wall of the internal circulation reaction side plate 6 and discharges the reactants through the guide pipe 4.

[0022] This reaction device is an improvement upon the traditional vertical continuous liquid-liquid phase reaction device. The upper perforated baffle 5 and the lower perforated baffle 8 effectively intercept solid catalyst particles, preventing them from flowing out with the reactants, thus ensuring that the catalyst can fully function within the reaction device. Figure 1 As shown, in the initial stage of the reaction device, the vertical displacement control device 11 of the thin tube ensures that the gas input from the gas pump input pipe 1 fully contacts and reacts with the pre-prepared solid catalyst particles, and reacts synchronously with the material input from the feed thin tube 2. During the intermediate stage of the reaction, the upper perforated baffle 5 in the inner circulation reaction side plate 6 uses tiny holes to physically intercept most of the coarse reactants and solid catalyst particles, preventing them from being carried out of the device by bubbles. Simultaneously, the lower perforated baffle 8 not only filters large particles but also promotes turbulence within the reaction device, enhancing the mass transfer between the solid and liquid phases and further improving reaction efficiency. After reacting in the inner circulation reaction tube, the reactants are finally obtained through the guide pipe 4 in the outer circulation reaction tube, resulting in a highly efficient reaction.

[0023] The above-disclosed embodiments are merely preferred embodiments of a porous baffle-type vertical batch reaction device for solid-liquid phase reactions, and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A vertical tube batch reaction device with porous baffles for solid-liquid phase reactions, characterized in that... ； It includes an upper material guide cover, an inner circulation reaction pipe and an outer circulation reaction pipe. The inner circulation reaction pipe is assembled inside the outer circulation reaction pipe. The upper material guide cover is assembled at the top of the inner circulation reaction pipe. The inner circulation reaction pipe includes an upper perforated baffle, an inner circulation reaction side plate, a lower plate with a circular hole and a lower perforated baffle. The lower plate with the circular hole is fixedly connected to the inner circulation reaction side plate and is located at the bottom of the inner circulation reaction side plate. The lower perforated baffle is fixedly connected to the inner circulation reaction side plate and is located on the side of the inner circulation reaction side plate near the lower perforated baffle. The upper perforated baffle is fixedly connected to the inner circulation reaction side plate and is located at the top of the inner circulation reaction side plate.

2. The riser-type batch reaction device with porous baffles for solid-liquid phase reaction as described in claim 1, characterized in that... ； The upper material guide cover includes an air pump input pipe, a material conveying capillary, a capillary vertical displacement control device, and a cover plate. The cover plate is assembled on the top of the inner circulation reaction side plate. The capillary vertical displacement control device is fixedly connected to the cover plate and located on the top of the cover plate. The air pump input pipe communicates with and passes through the capillary vertical displacement control device. The cover plate has pressure relief and exhaust holes located around the pressure relief and exhaust holes. The material conveying capillary communicates with the cover plate and is located around the capillary vertical displacement control device.

3. The riser-type batch reaction device with porous baffles for solid-liquid phase reaction as described in claim 2, characterized in that... ； The feed tubes have 6 sections.

4. The riser-type intermittent reaction device with porous baffles for solid-liquid phase reaction as described in claim 2, characterized in that... ； There are 6 pressure relief and venting ports.

5. The riser-type batch reaction device with porous baffles for solid-liquid phase reaction as described in claim 4. Its characteristics are: The external circulation reaction tube includes a base plate, an external circulation reaction side plate, and a guide pipe. The external circulation reaction side plate is sleeved on the outside of the internal circulation reaction side plate. The base plate is fixedly connected to the external circulation reaction side plate and is located at the bottom of the external circulation reaction side plate. The guide pipe is connected to the external circulation reaction side plate and is located on one side of the external circulation reaction side plate.

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