Stirring reaction system and method based on dynamic flow field optimization and moving heat source heating

Abstract

The invention discloses a stirring reaction system based on dynamic flow field optimization and moving heat source heating. The stirring reaction system comprises a kettle body, a stirring assembly, an adjustable flow guide assembly, a moving heat source heating system and a sensing control system, the stirring assembly comprises a driving device, a stirring rod and a paddle; the adjustable flow guide assembly comprises a lifting device and a flow guide cylinder; the movable heat source heating system comprises an electromagnetic induction coil and a metal hollow ball; and the sensing control system comprises a controller and an ultrasonic concentration meter. According to the stirring reaction system based on dynamic flow field optimization and moving heat source heating, the height of the guide cylinder is dynamically adjusted by sensing solid phase distribution so as to actively optimize the flow field, and uniform heating from the inside is achieved by inductively heating the moving metal hollow ball; and process strengthening and intelligent control are realized, and the reaction efficiency and the product quality are improved. Correspondingly, the invention further provides a stirring reaction method based on dynamic flow field optimization and moving heat source heating.

Description

Technical Field

[0001] This invention relates to the field of chemical mixing equipment technology, specifically to a mixing reaction system and method based on dynamic flow field optimization and mobile heat source heating. Background Technology

[0002] Stirred reactors are core equipment in unit processes such as mixing, reaction, and heat transfer in industries such as chemical, pharmaceutical, and food processing. To achieve optimal mixing results, large stirred reactors often use flow guides to direct internal flow and improve stirring efficiency. For example, Chinese patent document CN 216458855 U discloses a reaction system comprising: a reactor; a self-priming stirrer including a stirring shaft and stirring blades, one end of the stirring shaft having an air inlet communicating with a cavity in the stirring shaft; the stirring blades having air outlets communicating with a cavity in the stirring blades, the air outlets being spaced apart from the stirring shaft in the radial direction of the reactor; and a flow guide sleeve fitted around one end of the stirring shaft, the flow guide sleeve having a flow channel extending along the length of the stirring shaft.

[0003] However, most existing flow guide tubes are fixed inside the stirred tank, and their position cannot be adjusted according to parameters such as the properties of the reactants. This makes it impossible to fully utilize the flow control capability of the flow guide tube, and the stirring process lacks flexible control. The flow path cannot be manually adjusted, resulting in the existence of mixing dead zones inside the stirred tank and the phenomenon of particle sedimentation.

[0004] Furthermore, in terms of heating, traditional stirred tanks mostly employ static wall heating methods such as jackets or coils. For example, Chinese patent document CN 211133955 U discloses a jacketed oil bath heated stirred reactor, which includes a tank body, a jacket fixedly connected to the surface of the tank body, a feed hopper connected to one side of the jacket, soybean oil disposed between the jacket and the opposite side of the tank body, an electric heater fixedly connected to the bottom of the tank body, an electric heating wire disposed inside the electric heater, a wire electrically connected to the bottom of the electric heater, the bottom of the wire penetrating the jacket and extending to the outside of the jacket, and discharge pipes connected to both sides of the bottom of the jacket.

[0005] However, the above methods have problems such as low heat transfer efficiency, large temperature gradient inside the vessel, easy local overheating or insufficient heating, and easy scaling and crystallization on the inner wall, which seriously affect the reaction efficiency and product quality. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this application provides a stirred reaction system based on dynamic flow field optimization and mobile heat source heating. This stirred reaction system dynamically adjusts the height of the guide tube by sensing the solid phase distribution to actively optimize the flow field, and achieves uniform heating from the inside by inductively heating a moving metal ball. This effectively solves the inherent defects of traditional stirring equipment in mixing and heat transfer, achieving process intensification and intelligent control, and improving reaction efficiency and product quality. Correspondingly, this application also provides a stirred reaction method based on dynamic flow field optimization and mobile heat source heating.

[0007] For the system, the technical solution of this application is as follows:

[0008] A stirred reaction system based on dynamic flow field optimization and mobile heat source heating includes a vessel, a stirring assembly, an adjustable flow guiding assembly, a mobile heat source heating system, and a sensing and control system. The stirring assembly includes a drive device, a stirring rod located inside the vessel, and a set of blades on the stirring rod; the drive device drives the stirring rod to rotate. The adjustable flow guiding assembly includes a lifting device and a flow guiding cylinder, the flow guiding cylinder being fitted around the blades; the lifting device drives the flow guiding cylinder to move up and down. The mobile heat source heating system includes an electromagnetic induction coil and a set of hollow metal spheres; the electromagnetic induction coil is located inside the flow guiding cylinder, and the hollow metal spheres are placed inside the vessel. The sensing and control system includes a controller and a set of ultrasonic concentration meters; the ultrasonic concentration meters monitor the concentration inside the vessel. Both the electromagnetic induction coil and the ultrasonic concentration meters are electrically connected to the controller.

[0009] Compared with existing technologies, the stirring reaction system based on dynamic flow field optimization and mobile heat source heating in this application dynamically adjusts the height of the guide tube through feedback from an ultrasonic concentration meter, precisely optimizes the flow field structure, and eliminates mixing dead zones (i.e., when the solid concentration at the top is high, the guide tube moves to the top to allow the top solids to circulate quickly; when the solid concentration at the bottom is high, the guide tube moves to the bottom to allow the bottom solids to circulate and prevent particle sedimentation). It heats a hollow metal sphere inside the reactor through an electromagnetic induction coil, and the hollow metal sphere can move dynamically inside the reactor under the action of the impeller and the guide tube, thus realizing a paradigm shift from "static wall heating" to "dynamic volume heating." This fundamentally solves the problems of uneven temperature field and low heat transfer efficiency in traditional heating methods, improving reaction efficiency and product quality.

[0010] As an optimization, in the aforementioned stirred reaction system based on dynamic flow field optimization and mobile heat source heating, the sensing and control system further includes a temperature sensor. This temperature sensor monitors the temperature inside the vessel and is electrically connected to the controller. In this configuration, the temperature sensor, in conjunction with an ultrasonic concentration meter, provides feedback to the controller, enabling real-time adjustment of the vessel's internal temperature and optimization of the flow field, achieving intelligent control and further improving reaction efficiency.

[0011] As an optimization, in the aforementioned stirring reaction system based on dynamic flow field optimization and mobile heat source heating, the lifting device includes a screw drive mechanism and a magnet located at the top of the vessel. This structure, through a controller, regulates the magnitude and direction of the current flowing through the electromagnetic induction coil, causing the coil to generate magnetic fields of different magnitudes and directions. This, in turn, moves the guide tube closer to or away from the top of the vessel, thereby adjusting the height of the guide tube. Furthermore, the screw drive has a self-locking function, allowing the guide tube to remain stationary when it reaches the designated position.

[0012] Furthermore, in the aforementioned stirred reaction system based on dynamic flow field optimization and mobile heat source heating, a magnet is also provided at the bottom of the vessel, with the magnet at the bottom of the vessel facing each other to the magnet at the top of the vessel. This structure further strengthens the magnetic field inside the vessel, facilitating the adjustment of the height of the guide tube.

[0013] As an optimization, in the aforementioned stirred reaction system based on dynamic flow field optimization and moving heat source heating, the surface of the hollow metal sphere has a hollow structure. This structure further reduces the mass of the hollow metal sphere and increases its contact area, thereby improving thermal conductivity.

[0014] As an optimization, in the aforementioned stirred reaction system based on dynamic flow field optimization and mobile heat source heating, the bottom of the vessel is provided with a discharge port, and a filter screen is provided on the discharge port. This structure places the discharge port at the bottom of the vessel for easy material feeding; and the filter screen ensures that the hollow metal spheres are intercepted inside the vessel during feeding and recycled.

[0015] As an optimization, in the aforementioned stirred reaction system based on dynamic flow field optimization and mobile heat source heating, the stirring diameter of the impeller is 1 / 6 to 1 / 4 of the inner diameter of the vessel. With the addition of a guide tube, the stirring diameter can be reduced to 1 / 6 to 1 / 4 of the inner diameter of the vessel, thereby reducing the required stirring power and achieving energy saving and consumption reduction.

[0016] Furthermore, in the aforementioned stirred reaction system based on dynamic flow field optimization and mobile heat source heating, the height of the guide tube is 1 / 6 to 1 / 4 of the height of the vessel cavity. This size of guide tube satisfies the flow guiding effect while also keeping costs low.

[0017] As an optimization, in the aforementioned stirred reaction system based on dynamic flow field optimization and mobile heat source heating, the driving device is an electric motor. Electric motor drive offers advantages such as high efficiency and energy saving, clean operation, and easy maintenance.

[0018] Regarding the method, the technical solution of this application is as follows:

[0019] A stirring reaction method based on dynamic flow field optimization and moving heat source heating is implemented using the aforementioned stirring reaction system based on dynamic flow field optimization and moving heat source heating; it includes the following steps:

[0020] ① The driving device drives the stirring rod to rotate the blades; the lifting device adjusts the height of the guide tube in the middle of the vessel body; the blades and the guide tube work together to guide the flow field and form an upper and lower circulation path;

[0021] ② The electromagnetic induction coil inside the flow guide tube heats the metal hollow sphere that moves dynamically within the reactor.

[0022] ③ The height of the guide tube is dynamically adjusted by controlling the lifting device based on the feedback from the ultrasonic concentration meter: when the solid concentration at the top is high, the guide tube is moved to the top; when the solid concentration at the bottom is high, the guide tube is moved to the bottom.

[0023] Compared with existing technologies, the stirring reaction method based on dynamic flow field optimization and moving heat source heating proposed in this application dynamically adjusts the height of the guide tube through feedback from the ultrasonic concentration meter, actively optimizes the flow field, and eliminates mixing dead zones; it achieves uniform heating from the inside by induction heating the moving metal ball, fundamentally solving the problems of uneven concentration and low heat transfer efficiency in traditional methods, and improving reaction efficiency and product quality. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the stirred reaction system based on dynamic flow field optimization and moving heat source heating in this application;

[0025] Figure 2 This is a schematic diagram of the flow field at the top of the guide tube in this application;

[0026] Figure 3 This is a schematic diagram of the flow field in the middle of the guide tube in this application;

[0027] Figure 4 This is a schematic diagram of the flow field in the lower part of the flow guide tube in this application;

[0028] Figure 5 This is a schematic diagram illustrating the movement of the hollow metal sphere in this application;

[0029] Figure 6 This is a schematic diagram of the structure of a hollow metal sphere.

[0030] Figure 7 This is a partial flowchart of the working process of the stirred reaction system based on dynamic flow field optimization and mobile heat source heating in this application.

[0031] The labels in the attached diagram are as follows: 1-vessel body, 11-discharge port; 2-stirring assembly, 21-drive device, 22-stirring rod, 23-blade; 3-adjustable flow guiding assembly, 31-lifting device, 32-flow guiding cylinder; 4-mobile heat source heating system, 41-electromagnetic induction coil, 42-metal hollow sphere; 5-sensing control system, 51-controller, 52-ultrasonic concentration meter; 6-filter screen. Detailed Implementation

[0032] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application. In the following embodiments, content not described in detail or shown in detail in the accompanying drawings is common knowledge in the art.

[0033] Example (see) Figures 1 to 7 ):

[0034] A stirring reaction system based on dynamic flow field optimization and mobile heat source heating includes a vessel body 1, a stirring assembly 2, an adjustable flow guiding assembly 3, a mobile heat source heating system 4, and a sensing and control system 5. The stirring assembly 2 includes a drive device 21, a stirring rod 22 located inside the vessel body 1, and a set of blades 23 on the stirring rod 22. The drive device 21 is used to drive the stirring rod 22 to rotate. The adjustable flow guiding assembly 3 includes a lifting device 31 and a flow guiding cylinder 32. The flow guiding cylinder 32 is sleeved on the outside of the blades 23. The lifting device 31 is used to drive the flow guiding cylinder 32 to move up and down. The mobile heat source heating system 4 includes an electromagnetic induction coil 41 and a set of hollow metal spheres 42. The electromagnetic induction coil 41 is located inside the flow guiding cylinder 32, and the hollow metal spheres 42 are placed inside the vessel body 1. The sensing and control system 5 includes a controller 51 and a set of ultrasonic concentration meters 52. The ultrasonic concentration meters 52 are used to monitor the concentration inside the vessel body 1. Both the electromagnetic induction coil 41 and the ultrasonic concentration meters 52 are electrically connected to the controller 51.

[0035] In this embodiment, the sensing and control system 5 further includes a temperature sensor, which monitors the temperature inside the vessel 1. The temperature sensor is electrically connected to the controller 51. In this configuration, the temperature sensor, in conjunction with the ultrasonic concentration meter 52, provides feedback to the controller 51, enabling real-time adjustment of the internal temperature of the vessel 1 and optimization of the flow field, achieving intelligent control and further improving reaction efficiency.

[0036] In this embodiment, the lifting device 31 includes a screw drive mechanism and magnets respectively disposed at the top and bottom of the vessel body 1, with the magnets facing each other. This structure provides high transmission accuracy, enabling the guide tube 32 to move accurately to the designated position; furthermore, the screw drive has a self-locking function, allowing the guide tube 32 to remain stationary when it reaches the designated position.

[0037] In this embodiment, the surface of the hollow metal sphere 42 has a hollow structure. This structure further reduces the mass of the hollow metal sphere 42 and increases its contact area, thereby improving thermal conductivity.

[0038] In this embodiment, the bottom of the vessel body 1 is provided with a discharge port 11, and a filter screen 6 is provided on the discharge port 11. This structure places the discharge port 11 at the bottom of the vessel body 1, which facilitates the material feeding operation; and the filter screen 6 is provided so that the metal hollow ball 42 is intercepted inside the vessel body 1 during material feeding and can be recycled.

[0039] In this embodiment, the stirring diameter of the impeller 23 is 1 / 5 of the inner diameter of the vessel body 1. With the guide tube 32 installed, the stirring diameter can be reduced to 1 / 5 of the inner diameter of the vessel body 1, thereby reducing the required stirring power and achieving energy saving and consumption reduction.

[0040] In this embodiment, the height of the guide tube 32 is 1 / 5 of the height of the inner cavity of the vessel body 1. This size of guide tube 32 satisfies the flow guiding effect while keeping costs low.

[0041] In this embodiment, the driving device 21 is a motor. Motor drive has the advantages of high efficiency and energy saving, clean operation, and simple maintenance.

[0042] In this embodiment, the stirring reaction system based on dynamic flow field optimization and mobile heat source heating operates by driving the stirring rod 22, which in turn drives the impeller 23 to rotate, through the driving device 21. The flow field is constrained and guided by the guide tube 32, forming an up-and-down circulation path. The hollow metal sphere 42 inside the vessel 1 is heated by the electromagnetic induction coil 41 inside the guide tube 32. Because the hollow metal sphere 42 can move dynamically within the vessel 1 under the action of the impeller 23 and the guide tube 32, "dynamic volume heating" of the material inside the vessel 1 is achieved. Feedback from the acoustic concentration meter 52 controls the screw rotation, dynamically adjusts the height of the guide tube 32, precisely optimizes the flow field structure, and eliminates mixing dead zones: when the concentration of solids at the top is high, the guide tube 32 is moved to the top to allow the solids at the top to circulate down quickly; when the concentration of solids at the bottom is high, the guide tube 32 is moved to the bottom to allow the solids at the bottom to circulate, preventing particle sedimentation; after stirring, the discharge port is opened for material discharge, and the hollow metal ball 42 is intercepted by the filter screen 6 and remains inside the vessel 1, waiting for the next cycle.

[0043] The foregoing general description of the invention and its specific embodiments should not be construed as a limitation on the technical solution of the invention. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the invention, to form other technical solutions within the scope of protection of this application.

Claims

1. A stirred reaction system based on dynamic flow field optimization and heating with mobile heat sources, characterized in that: The system includes a vessel body (1), a stirring assembly (2), an adjustable flow guiding assembly (3), a mobile heat source heating system (4), and a sensing and control system (5). The stirring assembly (2) includes a drive device (21), a stirring rod (22) located inside the vessel body (1), and a set of blades (23) on the stirring rod (22). The drive device (21) is used to drive the stirring rod (22) to rotate. The adjustable flow guiding assembly (3) includes a lifting device (31) and a flow guiding cylinder (32). The flow guiding cylinder (32) is sleeved on the outside of the blades (23). The lifting device (31) is used to drive the stirring rod (22) to rotate. The guide tube (32) moves up and down; the mobile heat source heating system (4) includes an electromagnetic induction coil (41) and a set of metal hollow spheres (42), the electromagnetic induction coil (41) is located inside the guide tube (32), and the metal hollow spheres (42) are placed inside the vessel body (1); the sensing control system (5) includes a controller (51) and a set of ultrasonic concentration meters (52), the ultrasonic concentration meters (52) are used to monitor the concentration inside the vessel body (1); the electromagnetic induction coil (41) and the ultrasonic concentration meters (52) are both electrically connected to the controller (51).

2. The stirred reaction system based on dynamic flow field optimization and heating with mobile heat source of claim 1, wherein: The sensing and control system (5) also includes a temperature sensor, which is used to monitor the temperature inside the vessel (1) and is electrically connected to the controller (51).

3. The stirred reaction system based on dynamic flow field optimization and heating with mobile heat sources of claim 2, wherein: The lifting device (31) includes a screw drive mechanism and a magnet located on the top of the vessel body (1).

4. The stirred reaction system based on dynamic flow field optimization and heating with mobile heat sources of claim 3, wherein: The bottom of the vessel body (1) is also provided with a magnet, and the magnet at the bottom of the vessel body (1) is set facing the magnet at the top of the vessel body (1).

5. The stirred reaction system based on dynamic flow field optimization and heating with mobile heat sources of claim 4, wherein: The surface of the hollow metal sphere (42) has a hollow structure.

6. The stirred reaction system based on dynamic flow field optimization and heating with mobile heat sources of claim 5, wherein: The bottom of the vessel body (1) is provided with a discharge port (11), and a filter screen (6) is provided on the discharge port (11).

7. The stirred reaction system based on dynamic flow field optimization and heating with mobile heat sources of claim 6, wherein: The stirring diameter of the blade (23) is 1 / 6 to 1 / 4 of the inner diameter of the vessel body (1).

8. The stirred reaction system based on dynamic flow field optimization and heating with mobile heat sources of claim 7, wherein: The height of the guide tube (32) is 1 / 6 to 1 / 4 of the height of the inner cavity of the vessel body (1).

9. The agitated reaction system based on dynamic flow field optimization and heating with mobile heat sources of claim 1, wherein: The driving device (21) is a motor.

10. A stirred reaction process based on dynamic flow field optimization and heating with mobile heat sources, characterized by: This method employs the stirring reaction system based on dynamic flow field optimization and moving heat source heating as described in claim 1; it includes the following steps: ① The driving device (21) drives the stirring rod (22) to rotate the blade (23); the lifting device (31) adjusts the guide tube (32) to the middle height inside the vessel body (1); the blade (23) and the guide tube (32) work together to guide the flow field and form an upper and lower circulation path; ② The electromagnetic induction coil (41) inside the flow guide tube (32) heats the metal hollow sphere (42) that moves dynamically inside the vessel body (1). ③ By controlling the lifting device (31) through the feedback of the ultrasonic concentration meter (52), the height of the guide tube (32) is dynamically adjusted: when the solid concentration at the top is high, the guide tube (32) is moved to the top; when the solid concentration at the bottom is high, the guide tube (32) is moved to the bottom.

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