Chemical production reaction kettle and production process

Abstract

The application relates to the technical field of chemical equipment, and particularly discloses a reaction kettle for chemical production and a production process, which comprises a kettle body, a stirring motor installed on the top of the kettle body, a stirring shaft arranged at the output end of the stirring motor, and multiple cleaning units arranged in the kettle body in the circumferential direction of the stirring shaft. Each cleaning unit comprises: a mounting frame arranged on the stirring shaft to rotate with the stirring shaft; a cleaning roller rotatably arranged on the mounting frame, wherein the outer wall of the cleaning roller abuts against the inner wall of the kettle body, so that the adhering matters on the inner wall of the kettle body can be peeled off and removed when the cleaning roller revolves around the stirring shaft and rotates; a lifting scraper abutting between the cleaning roller and the stirring shaft to revolve with the stirring shaft; a lifting driving element installed on the mounting frame to drive the lifting scraper to lift; and a rotating roller installed on the side of the lifting scraper to generate turbulence. The reaction kettle for chemical production and the production process effectively prevent the secondary adhesion of the adhering matters on the cleaning components.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment technology, specifically to a reaction vessel and production process for chemical production. Background Technology

[0002] In fine chemical production processes, the reactor, as a core piece of equipment, undertakes crucial functions such as material mixing, chemical reaction, and mass and heat transfer. Its performance directly determines the efficiency of the synthesis reaction and the quality of the product. With the development of new synthetic processes, powdered solid raw materials, represented by sodium borohydride, are widely used in reduction reactions and the synthesis of pharmaceutical intermediates due to their high reactivity. However, in actual production, when powdered solid raw materials such as sodium borohydride need to be added to the reactor, it is found that sodium borohydride easily adheres to the reactor wall due to electrostatic adsorption and hygroscopic deliquescence, especially in solid-liquid two-phase reaction systems containing organic solvents. In the initial stage of feeding, the sodium borohydride adhering to the reactor wall is in powder form, forming a loose granular layer; however, due to its hygroscopic nature, sodium borohydride absorbs moisture from the environment and gradually deliquesces, becoming damp and sticky. The adhesion between the sodium borohydride and the reactor wall gradually increases, forming a gel-like adhesive layer.

[0003] Existing chemical production reactors, such as the Chinese patent document with authorization announcement number CN118904267B, disclose a reactor for safe chemical production. Under normal conditions, the two scraper blades of this reactor have sliding separation gaps from the inner circumference of the reactor shell, avoiding excessive wear caused by long-term friction and sliding contact between the scraper blades and the inner circumference of the reactor shell, thus helping to extend the service life of the scraper blades and the reactor shell. When the two scraper blades and the two strip-shaped mounting rods are separated from the inner circumference of the reactor shell, they can be used as vertical stirring components, achieving a dual-purpose effect. This eliminates the need for additional vertical stirring components between the four horizontal stirring shafts, simplifying the overall stirring structure of the reactor.

[0004] However, in the existing chemical safety production reactors, the aforementioned materials are scraped off by a scraper against the reactor wall and rotating with the rotating shaft sleeve. However, sodium borohydride becomes gel-like after absorbing moisture and deliquescence, and has strong adhesion. It easily adheres to the surface of the scraper during scraping. The sodium borohydride that adheres to the surface of the scraper not only reduces the utilization rate of raw materials and affects the uniformity of the reaction process, but also affects the subsequent scraping effect and increases the rotational resistance of the scraper. Summary of the Invention

[0005] This invention provides a reaction vessel and production process for chemical production, aiming to solve the problem in related technologies where the gel-like adhesive layer formed by the hygroscopic decomposition of sodium borohydride in reaction vessels used for safe chemical production is easily re-adhered to the surface of the scraper.

[0006] The chemical production reactor provided by this invention adopts the following technical solution:

[0007] A chemical production reactor includes a reactor body with an inlet and an outlet, a stirring motor mounted on the top of the reactor body, and a stirring shaft disposed at the output end of the stirring motor and extending downward into the reactor body. The chemical production reactor also includes multiple cleaning units arranged circumferentially along the stirring shaft within the reactor body. Each cleaning unit includes:

[0008] The mounting bracket is set on the stirring shaft and extends to the inner wall of the vessel so that it can rotate around the stirring shaft with the stirring shaft;

[0009] A cleaning roller is mounted on the mounting frame near the inner wall of the vessel body, rotating about its own axis. The outer wall of the cleaning roller abuts against the inner wall of the vessel body, so as to peel off and carry away the adhering material from the inner wall of the vessel body when the cleaning roller revolves around the stirring shaft and rotates on its own axis.

[0010] The lifting scraper and the lifting drive are provided. The lifting scraper abuts between the cleaning drum and the stirring shaft and revolves with the stirring shaft so that the surface of the lifting scraper can be impacted by the fluid. The lifting drive is mounted on the mounting frame and is used to drive the lifting scraper to move up and down so that the lifting scraper scrapes off the adhering material brought out by the cleaning drum.

[0011] A rotary roller, installed on the side of the lifting scraper, is used to generate turbulence to break up and remove the adhering material on the surface of the lifting scraper in conjunction with the impact force of the fluid.

[0012] By employing the above technical solution, the adhesive residue on the inner wall of the vessel is peeled off and carried away by the rotation and revolution of the cleaning roller, ensuring complete coverage of the inner wall and effectively removing the residue. A lifting drive unit drives the lifting scraper to move up and down, ensuring that the scraper promptly removes the residue carried away by the cleaning roller, preventing gel-like residues such as sodium borohydride from re-adhering to the cleaning roller or the inner wall of the vessel, thus guaranteeing the subsequent cleaning effect of the cleaning roller. Subsequently, the turbulence generated by the rotating roller, combined with the fluid impact force experienced by the lifting scraper during its revolution, breaks up the residue on the surface of the lifting scraper and carries it into the fluid, ensuring the cleaning effect. Through the coordinated work of all components in the cleaning unit, the residue is thoroughly removed, effectively preventing secondary adhesion to the cleaning components, significantly improving the cleaning effect and production efficiency of the equipment, and ensuring the stability and consistency of product quality.

[0013] Furthermore, the chemical production reactor also includes a first drive mechanism disposed inside the reactor body for driving the rotation of each cleaning roller. The first drive mechanism includes a first gear ring fixed on the reactor body and coaxially arranged with the stirring shaft, and a first planetary gear rotatably mounted on each of the cleaning rollers and meshing with the first gear ring.

[0014] By adopting the above technical solution and utilizing the principle of planetary gear train, the cleaning roller can rotate on its own axis while revolving around the sun, providing rotational power for the cleaning roller; the active drive method can adjust the rotation speed of the cleaning roller according to cleaning needs to adapt to the cleaning requirements of different adhesives, ensuring sufficient cleaning power and stable cleaning effect, and improving the removal efficiency of stubborn adhesives.

[0015] Furthermore, each of the aforementioned lifting drive components includes a drive screw rotatably mounted on the mounting bracket. The drive screw has a guide spiral groove, which includes a forward spiral section and a reverse spiral section. The upper and lower ends of the forward spiral section and the reverse spiral section are interconnected. The lifting scraper is provided with a guide block installed in the guide spiral groove.

[0016] Furthermore, the chemical production reactor also includes a second drive mechanism disposed inside the reactor body for driving each drive screw to rotate. The second drive mechanism includes a second gear ring fixed on the reactor body and coaxially arranged with the stirring shaft, and a second planetary gear rotatably mounted on each of the drive screws and meshing with the second gear ring.

[0017] Furthermore, each of the rollers is coaxially mounted with a friction roller, and the outer peripheral side of the friction roller is in frictional contact with the surface of the drive screw.

[0018] Furthermore, each of the said rollers includes a roller shaft rotatably mounted on the lifting scraper and a plurality of roller blades arranged circumferentially on the roller shaft.

[0019] Furthermore, each of the lifting scrapers forms a material-welcoming edge on the side away from the rotating roller, and the upper surface of the lifting scraper slopes downward from the rotating roller toward the material-welcoming edge.

[0020] By adopting the above technical solution, the fluid not only impacts the material receiving edge, but also flows along the inclined surface, expanding the impact range and allowing more fluid to participate in the impact on the upper surface of the lifting scraper, extending the impact time, and making the impact of the fluid on the adhering material more thorough, thereby improving the cleaning effect.

[0021] Furthermore, the lower surface of each of the lifting scrapers is inclined upwards from the rotating roller toward the receiving edge.

[0022] By adopting the above technical solution, it is possible to ensure that the fluid generates a large impact force on both the upper and lower surfaces of the lifting scraper, thereby further enhancing the cleaning effect and making it suitable for occasions with higher cleaning requirements.

[0023] Furthermore, each of the lifting scrapers has a guiding slope that slopes downwards from the cleaning roller toward the stirring shaft.

[0024] Using the above technical solution, the guide slope is used to guide the adhering material on the surface of the lifting scraper to flow towards the stirring shaft, preventing the adhering material from accumulating on the surface of the lifting scraper and forming local clumps, which facilitates the subsequent crushing and removal of the adhering material.

[0025] This invention also provides a production process for chemical production, comprising the following steps:

[0026] The first step is stirring. The reactants are added into the vessel through the feed inlet, and the stirring motor is started. The stirring motor drives the stirring shaft to rotate, so that the reactants are mixed evenly.

[0027] The second step is peeling. The stirring shaft drives the cleaning drum to revolve around the stirring shaft through the mounting frame. The outer wall of the cleaning drum abuts against the inner wall of the vessel and rotates. The outer wall of the cleaning drum peels off and carries away the adhering material from the inner wall of the vessel through friction.

[0028] The third step is scraping. The cleaning roller and stirring shaft drive the lifting scraper to revolve around the stirring shaft. The lifting drive component drives the lifting scraper to move up and down. The lifting scraper scrapes the adhering material brought out by the cleaning roller onto the surface of the lifting scraper.

[0029] The fourth step is crushing. The rotation of the roller generates turbulence, which, combined with the fluid impact force on the lifting scraper as it revolves with the stirring shaft, breaks up and removes the adhering material on the surface of the lifting scraper.

[0030] By employing the above technical solution, a highly efficient material mixing and self-cleaning process is achieved through four key steps: stirring, peeling, scraping, and crushing. The cleaning roller's rotation and revolution peel off and carry away the adhering substances from the inner wall of the vessel, ensuring complete coverage and effectively removing these substances. A lifting drive mechanism moves the lifting scraper up and down, promptly scraping off the adhering substances carried by the cleaning roller, preventing gel-like adhering substances such as sodium borohydride from re-adhering to the cleaning roller or the inner wall of the vessel, thus ensuring the cleaning roller's subsequent cleaning effect. Subsequently, the turbulence generated by the rotating roller, combined with the fluid impact force experienced by the lifting scraper during its revolution, breaks up the adhering substances on the surface of the lifting scraper and carries them into the fluid, ensuring a cleaning effect. Through the synergistic effect of multiple steps, adhering substances are thoroughly removed, effectively preventing secondary adhesion to the cleaning components, significantly improving the equipment's cleaning effect and production efficiency, and ensuring the stability and consistency of product quality.

[0031] The beneficial effects of the chemical production reactor and production process provided by this invention are as follows: The cleaning roller's rotation and revolution peel off and carry away the adhering substances on the inner wall of the reactor, ensuring complete coverage and effectively removing these adhering substances. Furthermore, the lifting drive unit drives the lifting scraper to move up and down, ensuring that the scraper promptly scrapes off the adhering substances carried away by the cleaning roller, preventing gel-like adhering substances such as sodium borohydride from re-adhering to the cleaning roller or the inner wall of the reactor, thus guaranteeing the subsequent cleaning effect of the cleaning roller. Subsequently, the turbulence generated by the rotating roller, combined with the fluid impact force experienced by the lifting scraper during its revolution, breaks up the adhering substances on the surface of the lifting scraper and carries them into the fluid, ensuring the cleaning effect. Through the coordinated work of each component in the cleaning unit, the adhering substances are thoroughly removed, effectively preventing secondary adhesion on the cleaning components, significantly improving the cleaning effect and production efficiency of the equipment, and ensuring the stability and consistency of product quality. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the external structure of the chemical production reactor of the present invention.

[0033] Figure 2 This is a schematic diagram of the internal structure of the chemical production reactor of the present invention.

[0034] Figure 3 This is a schematic diagram of the cleaning unit of the chemical production reactor of the present invention.

[0035] Figure 4 This is a schematic diagram of the cleaning unit of the chemical production reactor of the present invention from another perspective.

[0036] Figure 5 This is a schematic diagram of the lifting scraper of the chemical production reactor of the present invention.

[0037] Figure 6 This is a schematic diagram of the structure of the rotary roller of the chemical production reactor of the present invention.

[0038] Figure 7 This is a schematic diagram of the first and second drive mechanisms of the chemical production reactor of the present invention.

[0039] Figure label:

[0040] 10. Kettle body; 110. Feed inlet; 111. Powder inlet; 112. Liquid inlet; 120. Discharge outlet; 20. Stirring motor; 30. Stirring shaft; 40. Mounting frame; 50. Cleaning roller; 60. Lifting scraper; 610. Feeding edge; 70. Drive screw; 710. Guide spiral groove; 80. Rotary roller; 810. Roller shaft; 820. Rotary blade; 830. Friction wheel; 910. First drive mechanism; 911. First gear ring; 912. First planetary gear; 913. First gear carrier; 914. First annular groove; 920. Second drive mechanism; 921. Second gear ring; 922. Second planetary gear; 923. Second gear carrier; 924. Second annular groove. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0042] like Figures 1 to 7 As shown, an embodiment of the chemical production reactor of the present invention includes a reactor body 10, a stirring device, a cleaning unit, a first drive mechanism 910, and a second drive mechanism 920. The reactor body 10 is the core part of the reactor. The stirring device, cleaning unit, first drive mechanism 910, and second drive mechanism 920 are respectively disposed on the reactor body 10. The stirring device is used to mix the reactants, the cleaning unit is used to clean the adhering substances on the inner wall of the reactor body 10, and the first drive mechanism 910 and second drive mechanism 920 provide power to the cleaning unit.

[0043] like Figure 1 and Figure 2 As shown, the vessel body 10 is cylindrical in shape, and a reaction chamber for containing reactants is formed inside the vessel body 10. The reaction chamber is also cylindrical. A feed inlet 110 is provided at the top of the vessel body 10, and a discharge outlet 120 is provided at the bottom. The feed inlet 110 includes a powder inlet 111 for adding powdered materials such as sodium borohydride into the vessel body 10, and a liquid inlet 112 for adding liquid materials such as water into the vessel body 10.

[0044] The stirring device includes a stirring motor 20 mounted on the top of the vessel body 10 and a stirring shaft 30 located at the output end of the stirring motor 20 and extending downward into the interior of the vessel body 10. In other embodiments, stirring blades that rotate with the stirring shaft 30 may be provided on the stirring shaft 30 to stir the reactants inside the vessel body 10, ensuring uniform mixing of the reactants and promoting the smooth progress of the reaction.

[0045] like Figure 2 , Figure 3 and Figure 4As shown, multiple cleaning units are provided and arranged circumferentially inside the vessel body 10 along the stirring shaft 30. Each cleaning unit includes a mounting frame 40, a cleaning roller 50, a lifting scraper 60, a lifting drive component, and a rotating roller 80.

[0046] The mounting bracket 40 is fixed to the bottom end of the stirring shaft 30 and extends outward to the inner wall of the vessel body 10, so as to rotate around the stirring shaft 30, thereby driving the entire cleaning unit to revolve around the stirring shaft 30. The lower surface of the mounting bracket 40 is in contact with the inner bottom surface of the vessel body 10, so that the inner bottom surface of the vessel body 10 can be cleaned when the mounting bracket 40 revolves, which is beneficial for removing residual materials or adhering substances from the bottom of the vessel.

[0047] The cleaning roller 50 is rotatably mounted on the mounting bracket 40 near the inner wall of the vessel body 10, with its outer wall abutting against the inner wall of the vessel body 10. As the cleaning roller 50 revolves around the stirring shaft 30 and rotates on its own axis, the friction generated by the outer wall of the cleaning roller 50 against the inner wall of the vessel body 10 overcomes the adhesion between the adhesive and the inner wall of the vessel body 10, gradually peeling off the adhesive. The peeled-off adhesive temporarily adheres to the outer wall of the cleaning roller 50, thus achieving the effect of the cleaning roller 50 peeling off and carrying away the adhesive from the inner wall of the vessel body 10. In this embodiment, the cleaning roller 50 is actively driven to rotate around its own axis by the first driving mechanism 910. The active driving method allows adjustment of the rotation speed of the cleaning roller 50 according to cleaning needs, adapting to the cleaning requirements of different adhesives, ensuring sufficient cleaning force and stable cleaning effect, and improving the removal efficiency of stubborn adhesives. In other embodiments, the cleaning drum 50 can also rotate by the friction between its outer wall and the inner wall of the vessel body 10 when the cleaning drum 50 revolves around the stirring shaft 30. The passive rotation method has a relatively simple structure and reduces the manufacturing cost of the equipment.

[0048] like Figure 5 As shown, the lifting scraper 60 is located between the cleaning drum 50 and the stirring shaft 30. The end faces of the lifting scraper 60 facing the cleaning drum 50 and the stirring shaft 30 are respectively formed with arc-shaped grooves to adapt to the outer surface shapes of the cleaning drum 50 and the stirring shaft 30, thereby abutting against the cleaning drum 50 and the stirring shaft 30. When the cleaning drum 50 revolves around the stirring shaft 30, it can drive the lifting scraper 60 to revolve around the stirring shaft 30, thus allowing the surface of the lifting scraper 60 to be subjected to fluid impact.

[0049] It should be noted that when the lifting scraper 60 revolves around the stirring shaft 30, it can also stir the reactants inside the vessel body 10, to some extent replacing the function of the stirring blade, so it is possible to omit the need for a separate stirring blade. However, when the reaction process requires a high degree of uniformity in the mixing of the reactants, the stirring effect of the lifting scraper 60 may be relatively weak. In this case, a separate stirring blade is still required, and the lifting scraper 60 plays an auxiliary stirring role to enhance the mixing effect of the reactants.

[0050] The lifting drive component is mounted on the mounting frame 40 and is used to drive the lifting scraper 60 to move up and down, so that the lifting scraper 60 can scrape off the adhesive brought out by the cleaning roller 50 in time. The scraped-off adhesive is located on the upper and lower surfaces of the lifting scraper 60. Each lifting drive component includes a drive screw 70 rotatably mounted on the mounting frame 40. The drive screw 70 has a guide spiral groove 710, which includes a forward spiral section and a reverse spiral section. The upper and lower ends of the forward spiral section and the reverse spiral section are interconnected. The lifting scraper 60 is provided with a guide block installed in the guide spiral groove 710. In this embodiment, the drive screw 70 is driven to rotate by the second drive mechanism 920. As the drive screw 70 continuously rotates around its own axis, the guide block moves in the guide spiral groove 710. Since the guide spiral groove 710 includes a forward spiral section and a reverse spiral section, and the upper and lower ends of the forward spiral section and the reverse spiral section are interconnected, the guide block can move up and down continuously along the guide spiral groove 710, thereby driving the lifting scraper 60 to move up and down reciprocally. In other embodiments, the lifting drive can also be a gear and rack mechanism, hydraulic or pneumatic drive mechanism, or other mechanism that enables the lifting scraper 60 to move up and down.

[0051] like Figure 4 , Figure 5 and Figure 6 As shown, the rotary roller 80 is mounted on the side of the lifting scraper 60 and extends radially along the stirring shaft 30. The rotary roller 80 includes a roller shaft 810 rotatably mounted on the lifting scraper 60 and multiple rotary blades 820 arranged circumferentially on the roller shaft 810. A friction wheel 830 is coaxially mounted at the middle position along the length of the rotary roller 80. The outer peripheral side of the friction wheel 830 is in frictional contact with the surface of the drive screw 70, so that when the lifting scraper 60 drives the rotary roller 80 to move up and down, the friction wheel 830 can rotate under the action of the friction between its outer peripheral side and the surface of the drive screw 70, thereby driving the rotary roller 80 to rotate without the need for an additional power source.

[0052] The side of the lifting scraper 60 away from the rotary roller 80 forms a welcoming edge 610, that is, the welcoming edge 610 is located on the front side of the lifting scraper 60, and the rotary roller 80 is located on the rear side of the lifting scraper 60. When the lifting scraper 60 revolves, the impact force of the fluid on the upper and lower surfaces of the lifting scraper 60 is from the welcoming edge 610 toward the turbulence area of ​​the rotary roller 80. In this way, the fluid dynamics can be used to guide the adhering material on the upper and lower surfaces of the lifting scraper 60 to move toward the rotary roller 80.

[0053] When the roller 80 rotates under the drive of friction, the roller blades 820 will generate a strong stirring effect on the surrounding fluid, thereby generating turbulence. This turbulence increases the impact force of the fluid on the adhering material. In this embodiment, the drive screw 70 is located between the rotary roller 80 and the receiving edge 610. This allows the lifting scraper 60 to drive the rotary roller 80 upward and scrape the adhesive brought out by the cleaning roller 50 onto the upper surface of the lifting scraper 60. At this time, the contact part between the rotary roller 80 and the drive screw 70 rotates downward under the action of friction, that is, the upper end of the rotary roller 80 rotates towards the upper surface of the lifting scraper 60 to generate turbulence on the upper surface of the lifting scraper 60. When the lifting scraper 60 drives the rotary roller 80 downward and scrapes the adhesive brought out by the cleaning roller 50 onto the lower surface of the lifting scraper 60, the contact part between the rotary roller 80 and the drive screw 70 rotates upward under the action of friction, that is, the lower end of the rotary roller 80 rotates towards the lower surface of the lifting scraper 60 to generate turbulence on the lower surface of the lifting scraper 60.

[0054] Thus, the rotation direction of the rotary roller 80 can automatically match the lifting direction of the lifting scraper 60, thereby achieving double-sided cleaning of the lifting scraper 60. Furthermore, the impact force exerted by the turbulence generated by the rotary roller 80 on the surface of the lifting scraper 60 is opposite to the direction of the fluid impact force experienced by the lifting scraper 60 during its revolution. These two opposing impact forces can counteract each other and act together on the adhering substances on the upper and lower surfaces of the lifting scraper 60, causing the adhering substances on the surface of the lifting scraper 60 to be broken, loosened, and peeled off. Then, under the action of centrifugal force, these adhering substances are thrown into the surrounding fluid and mixed with the reactants, thereby achieving cleaning of the lifting scraper 60.

[0055] The upper surface of the lifting scraper 60 slopes downwards from the rotating roller 80 towards the receiving edge 610. This allows the fluid to not only impact the receiving edge 610 but also flow along the sloped surface, expanding the impact range and allowing more fluid to participate in the impact on the upper surface of the lifting scraper 60. This prolongs the impact time and ensures a more thorough impact on the adhering materials, improving the cleaning effect. The lower surface of the lifting scraper 60 is horizontal, which helps maintain the stability of the lifting scraper 60 during revolution and vertical movement, reducing the twisting or deformation that may be caused by the slope of the upper and lower surfaces, and extending the service life of the equipment. In other embodiments, the lifting scraper 60 can also be configured with both upper and lower surfaces sloped, that is, the upper surface slopes downwards from the rotating roller 80 towards the receiving edge 610, and the lower surface slopes upwards from the rotating roller 80 towards the receiving edge 610. This ensures that the fluid generates a large impact force on both the upper and lower surfaces of the lifting scraper 60, further enhancing the cleaning effect and making it suitable for applications with higher cleaning requirements.

[0056] The lifting scraper 60 has a downward guiding slope from the cleaning roller 50 to the stirring shaft 30. The guiding slope is used to guide the adhering material on the surface of the lifting scraper 60 to flow towards the stirring shaft 30, preventing the adhering material from accumulating on the surface of the lifting scraper 60 and forming local clumps, which facilitates the subsequent crushing and removal of the adhering material.

[0057] like Figure 2 , Figure 3 and Figure 7 As shown, the first drive mechanism 910 drives each cleaning roller 50 to rotate. It includes a first gear carrier 913 fixedly mounted on the vessel body 10, a first gear ring 911 fixedly mounted on the first gear carrier 913 and coaxially arranged with the stirring shaft 30, and a first planetary gear 912 rotatably mounted on each cleaning roller 50 and meshing with the first gear ring 911. A first annular groove 914 is provided on the first gear carrier 913. Each cleaning roller 50 is movably fitted into the first annular groove 914, which helps guide and constrain the movement trajectory of the cleaning roller 50, ensuring smooth movement along the first annular groove 914, avoiding unnecessary shaking or displacement, and improving the stability of the cleaning process. The first drive mechanism 910 utilizes the principle of a planetary gear system, enabling the cleaning roller 50 to rotate while revolving around the central axis, enhancing the cleaning effect on the inner wall of the vessel body 10.

[0058] The second drive mechanism 920 is used to drive the rotation of each drive screw 70. It includes a second gear carrier 923 fixedly mounted on the vessel body 10, a second gear ring 921 fixedly mounted on the second gear carrier 923 and coaxially arranged with the stirring shaft 30, and a second planetary gear 922 rotatably mounted on each drive screw 70 and meshing with the second gear ring 921. A second annular groove 924 is provided on the second gear carrier 923. Each drive screw 70 is movably fitted into the second annular groove 924, which helps guide and constrain the movement trajectory of the drive screw 70, ensuring its smooth movement along the second annular groove 924. The second drive mechanism 920 utilizes the principle of a planetary gear system, enabling the drive screw 70 to rotate simultaneously with its revolution around the sun, providing rotational power for the drive screw 70.

[0059] An embodiment of the chemical production process of the present invention includes the following steps:

[0060] The first step is stirring. The reactants are added into the vessel body 10 through the feed inlet 110. The stirring motor 20 is started, and the stirring motor 20 drives the stirring shaft 30 to rotate, so as to mix the reactants evenly.

[0061] The second step is peeling. The stirring shaft 30 drives the cleaning roller 50 to revolve around the stirring shaft 30 through the mounting frame 40. The outer wall of the cleaning roller 50 abuts against the inner wall of the vessel body 10 and generates rotation. The outer wall of the cleaning roller 50 peels off and carries away the adhering material on the inner wall of the vessel body 10 through friction.

[0062] The third step is scraping. The cleaning roller 50 and the stirring shaft 30 drive the lifting scraper 60 to revolve around the stirring shaft 30. The lifting drive drives the lifting scraper 60 to move up and down. The lifting scraper 60 scrapes the adhering material brought out by the cleaning roller 50 onto the surface of the lifting scraper 60.

[0063] The fourth step is crushing. The rotation of the rotary roller 80 generates turbulence, which, together with the fluid impact force received by the lifting scraper 60 as it revolves with the stirring shaft 30, crushes and removes the adhering material on the surface of the lifting scraper 60.

[0064] Thus, in the embodiments of the chemical production reactor and production process of the present invention, the adhesives on the inner wall of the reactor body 10 are peeled off and carried out by the rotation and revolution of the cleaning roller 50, ensuring complete coverage of the inner wall of the reactor body 10 and effectively removing the adhesives. The lifting drive component drives the lifting scraper 60 to move up and down, allowing the lifting scraper 60 to promptly scrape off the adhesives carried out by the cleaning roller 50, preventing gel-like adhesives such as sodium borohydride from re-adhering to the cleaning roller 50 or the inner wall of the reactor body 10, ensuring the subsequent cleaning effect of the cleaning roller 50. Subsequently, the turbulence generated by the rotating roller 80, combined with the fluid impact force received by the lifting scraper 60 during its revolution, breaks up the adhesives on the surface of the lifting scraper 60 and carries them into the fluid, ensuring the cleaning effect. Through the coordinated work of each component in the cleaning unit, the adhesives are ensured to be completely removed, effectively preventing secondary adhesion of adhesives to the cleaning components, significantly improving the cleaning effect and production efficiency of the equipment, and ensuring the stability and consistency of product quality.

[0065] 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 chemical production reactor, comprising a reactor body having an inlet and an outlet, a stirring motor mounted on the top of the reactor body, and a stirring shaft disposed at the output end of the stirring motor and extending downward into the reactor body, characterized in that, It also includes multiple cleaning units arranged circumferentially along the stirring axis inside the vessel body, each cleaning unit comprising: The mounting bracket is set on the stirring shaft and extends to the inner wall of the vessel so that it can rotate around the stirring shaft with the stirring shaft; The cleaning drum is mounted on the mounting bracket near the inner wall of the vessel, rotating around its own axis. The outer wall of the cleaning drum abuts against the inner wall of the vessel, so that the adhering material on the inner wall of the vessel is peeled off and carried out when the cleaning drum revolves around the stirring shaft and rotates on its own axis. The lifting scraper and lifting drive are provided. The lifting scraper abuts between the cleaning drum and the stirring shaft and revolves with the stirring shaft, so that the surface of the lifting scraper can be impacted by the fluid. The lifting drive is mounted on the mounting frame and is used to drive the lifting scraper to move up and down so that the lifting scraper scrapes off the adhering material brought out by the cleaning drum. Each lifting drive includes a drive screw rotatably mounted on the mounting frame. The drive screw has a guide spiral groove, which includes a forward spiral section and a reverse spiral section. The upper and lower ends of the forward spiral section and the reverse spiral section are connected to each other. The lifting scraper is provided with a guide block installed in the guide spiral groove. Rotary rollers are installed on the side of the lifting scraper. The rotary rollers are used to generate turbulence to break up and remove the adhering substances on the surface of the lifting scraper in conjunction with the impact force of the fluid. Each rotary roller is coaxially mounted with a friction roller, and the outer circumference of the friction roller is in frictional contact with the surface of the drive screw. Each roller includes a roller shaft rotatably mounted on a lifting scraper and multiple roller blades arranged circumferentially on the roller shaft.

2. The chemical production reactor according to claim 1, characterized in that, The chemical production reactor also includes a first drive mechanism disposed inside the reactor body for driving the rotation of each cleaning roller. The first drive mechanism includes a first gear ring fixed on the reactor body and coaxially arranged with the stirring shaft, and a first planetary gear rotatably mounted on each cleaning roller and meshing with the first gear ring.

3. The chemical production reactor according to claim 1, characterized in that, The chemical production reactor also includes a second drive mechanism disposed inside the reactor body for driving each drive screw to rotate. The second drive mechanism includes a second gear ring fixed on the reactor body and coaxially arranged with the stirring shaft, and a second planetary gear rotatably mounted on each drive screw and meshing with the second gear ring.

4. A chemical production reactor according to claim 1 or 2, characterized in that, Each of the lifting scrapers forms a material-welcoming edge on the side away from the rotary roller, and the upper surface of the lifting scraper slopes downward from the rotary roller toward the material-welcoming edge.

5. A chemical production reactor according to claim 4, characterized in that, The lower surface of each of the lifting scrapers is inclined upwards from the rotating roller towards the material receiving side.

6. A chemical production reactor according to claim 1 or 2, characterized in that, Each of the aforementioned lifting scrapers has a guiding slope that slopes downwards from the cleaning roller toward the mixing shaft.

7. A production process for chemical production, characterized in that, The chemical production reactor according to claim 1 includes the following steps: The first step is stirring. The reactants are added into the vessel through the feed inlet, and the stirring motor is started. The stirring motor drives the stirring shaft to rotate, so that the reactants are mixed evenly. The second step is peeling. The stirring shaft drives the cleaning drum to revolve around the stirring shaft through the mounting frame. The outer wall of the cleaning drum abuts against the inner wall of the vessel and rotates. The outer wall of the cleaning drum peels off and carries away the adhering material from the inner wall of the vessel through friction. The third step is scraping. The cleaning roller and stirring shaft drive the lifting scraper to revolve around the stirring shaft. The lifting drive component drives the lifting scraper to move up and down. The lifting scraper scrapes the adhering material brought out by the cleaning roller onto the surface of the lifting scraper. The fourth step is crushing. The rotation of the roller generates turbulence, which, combined with the fluid impact force on the lifting scraper as it revolves with the stirring shaft, breaks up and removes the adhering material on the surface of the lifting scraper.

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