A reciprocating form stirred reactor suitable for use with high viscosity fluids

Abstract

The application relates to the technical field of chemical reaction equipment, and discloses a reciprocating type stirring reactor suitable for high-viscosity fluid, which comprises a support; a stirring tank arranged at the bottom of the support and used for containing a stirring working medium; a screw rod reciprocating mechanism arranged above the support and having a screw rod axis perpendicular to the upper surface of the support; a stirring mechanism arranged on the screw rod reciprocating mechanism and comprising a stirring motor and a stirring paddle, wherein the stirring motor drives the stirring paddle to rotate around the axis of the stirring motor; and a control device in signal connection with the screw rod reciprocating mechanism and the stirring mechanism; the control device dynamically adjusts the reciprocating motion parameters of the stirring mechanism according to the viscosity parameters of the working medium in the stirring tank and / or the real-time stirring torque, and the reciprocating motion parameters at least include one or more of reciprocating speed, reciprocating frequency and reciprocating stroke; the application can effectively avoid the formation of isolated mixing isolation zones and the reduction of mixing efficiency caused by the formation of the isolated mixing isolation zones, can meet the stirring requirements of complex fluid such as high-viscosity fluid and high-solid-content fluid, and improves the stirring effect and efficiency.

Description

Technical Field

[0001] This invention relates to the field of chemical reaction equipment technology, and in particular to a reciprocating stirred reactor suitable for high-viscosity fluids. Background Technology

[0002] Agitators are widely used in chemical, biological, and food industries. Their main function is to use the rotation of impellers to create flow and mixing of fluids within a tank, thereby achieving mass transfer, heat transfer, and reactions. The performance and efficiency of an agitator depend on factors such as the type, structure, location, number, and rotational speed of the impellers. Different impellers have different flow field characteristics and mixing mechanisms.

[0003] Conventional mixing methods have certain limitations under low speed and high viscosity conditions. Specifically, when mixing high-viscosity materials at low Reynolds numbers, a mixing isolation zone exists near the top and bottom of the impeller within the mixing tank. The fluid in this isolation zone mixes primarily through molecular diffusion, with almost no mass transfer between it and the fluid in the active mixing zone within the tank. This isolation cannot be eliminated even with prolonged mixing, resulting in poor mixing performance. Furthermore, high shear, wake vortices, and symmetrical flow fields are easily generated at the impeller tips, further exacerbating the formation of this "isolated mixing isolation zone," thereby reducing the fluid mixing efficiency.

[0004] Currently, commonly used agitators come in various forms, including radial flow, axial flow, rigid, and flexible, each with its own advantages and disadvantages, but none can fully meet the mixing requirements of complex fluids with high viscosity and high solids content. Existing high-viscosity polymerization equipment typically employs vacuum devolatilization technology or screw extrusion technology. Neither of these technologies can effectively address process issues such as molecular weight transformation, dissolution, and mass transfer during bulk polymerization. While vacuum devolatilization equipment can achieve the devolatilization function, the heat generated during polymerization is difficult to control, potentially leading to reduced product quality or even explosive polymerization. Screw extrusion equipment, when used for ultra-high viscosity materials, is prone to blockage due to the high viscosity, resulting in poor conveying efficiency, high energy consumption, and short material residence time, failing to meet the chemical reaction requirements of ultra-high viscosity materials.

[0005] Therefore, there is an urgent need to develop a new type of stirred reactor that can effectively avoid the formation of "isolated mixing zones", adapt to high-viscosity fluid conditions, improve the stirring effect and efficiency, and reduce stirring power consumption and shear. Summary of the Invention

[0006] The purpose of this invention is to provide a reciprocating stirred reactor suitable for high-viscosity fluids, aiming to solve or improve at least one of the above-mentioned technical problems, effectively avoid the formation of isolated mixing zones, which leads to a decrease in mixing efficiency, meet the stirring requirements of complex fluids such as high viscosity and high solids content, and improve the stirring effect and efficiency.

[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides a reciprocating stirred reactor suitable for high-viscosity fluids, comprising: support; A mixing tank, located at the bottom of the support, is used to hold the working medium to be mixed; A lead screw reciprocating mechanism is installed above the bracket, with its lead screw axis perpendicular to the upper surface of the bracket; A stirring mechanism, mounted on the screw reciprocating mechanism, includes a stirring motor and a stirring paddle, wherein the stirring motor drives the stirring paddle to rotate around its own axis; The control device is signal-connected to the lead screw reciprocating mechanism and the stirring mechanism; The lead screw reciprocating mechanism drives the stirring mechanism to perform linear reciprocating motion along the lead screw axis, thereby enabling the stirring paddle to reciprocate relative to the support within the lead screw stroke range while the stirring paddle rotates. The control device is configured to dynamically adjust the reciprocating motion parameters of the stirring mechanism based on the viscosity parameters of the working fluid in the stirring tank and / or the real-time stirring torque. The reciprocating motion parameters include at least one or more of the reciprocating speed, reciprocating frequency, and reciprocating stroke.

[0008] Optionally, the lead screw reciprocating mechanism includes a profile frame, a lead screw rotary motor, a ball screw, a lead screw nut, a linear slide rail, and a slider; The lead screw rotary motor is mounted on the upper end of the profile frame via a motor mounting plate. Its output shaft is connected to the ball screw via a first coupling. The upper end of the ball screw is fixed by a fixed end support, and the lower end is fixed by a support end support. The linear slide rail is mounted on both sides of the ball screw and fixed to the profile frame. The slider is slidably mounted on the linear slide rail. The lead screw nut and the slider are mounted together on a stirring mechanism mounting plate. The slider and the stirring mechanism mounting plate are connected by a connecting block.

[0009] Optionally, the stirring mechanism further includes an L-shaped mounting plate, a bearing support, and a bearing support mounting bracket; The L-shaped mounting plate is mounted on the stirring mechanism mounting plate, the stirring motor is mounted on the L-shaped mounting plate, the bearing support mounting bracket is fixedly connected to the L-shaped mounting plate, the bearing support is mounted on the bearing support mounting bracket and is used to radially support the stirring paddle, and the stirring paddle and the output shaft of the stirring motor are connected through a second coupling to transmit power.

[0010] Optionally, the control device is configured to: control the forward and reverse rotation and speed of the ball screw rotary motor to enable the stirring mechanism to reciprocate within the stroke range of the ball screw at a set speed, a set frequency and a set stroke.

[0011] Optionally, the control device is configured to control the stirring motor to operate in a variable speed mode or an intermittent mode, so that the rotational speed of the stirring paddle changes dynamically with the change of the reciprocating position of the stirring mechanism.

[0012] Optionally, the control device is configured to increase the reciprocating speed or decrease the reciprocating stroke when the viscosity of the working fluid in the mixing tank increases, and to reduce the reciprocating frequency when the stirring torque increases, so as to maintain the stability of the stirring process and the mixing efficiency.

[0013] Optionally, the control device is configured to generate a control signal according to a preset hyperchaotic sequence or chaotic mapping algorithm. The control signal is used to drive the lead screw rotary motor and / or the stirring motor, so that the reciprocating motion of the stirring mechanism and the rotational motion of the stirring paddle change non-periodically, thereby forming a chaotic mixing flow field in the mixing tank.

[0014] Optionally, the control device is further configured to: acquire real-time viscosity data of the working fluid in the mixing tank and / or real-time torque data of the stirring motor, and perform closed-loop feedback adjustment of the reciprocating motion parameters based on the real-time viscosity data and / or real-time torque data.

[0015] Optionally, the control device is a PLC controller.

[0016] Optionally, a temperature regulating device is provided on the outside of the mixing tank to regulate the temperature of the working fluid inside the mixing tank.

[0017] The present invention discloses the following technical effects: This invention combines mechanical structure design with motor steering and speed control to enable the stirring mechanism to perform linear reciprocating motion relative to the support. While the stirring paddle rotates, it also moves up and down relative to the support, increasing the stirring area and achieving dynamic changes in the stirring zone. This effectively enhances convection, disrupts the system's periodicity and symmetry, reduces regular regions, and increases chaotic regions in the flow. By forming chaotic flow to enhance fluid mixing, it effectively avoids the formation of isolated mixing zones that lead to reduced mixing efficiency, meeting the stirring requirements of complex fluids with high viscosity and high solids content. Simultaneously, this device reduces energy consumption, achieving energy conservation and emission reduction.

[0018] The stirring paddle of this invention performs axial reciprocating motion while rotating, causing the stirring zone to change dynamically within the mixing tank. This effectively breaks the periodicity or symmetry of conventional stirring methods, eliminates the mixing isolation zone in laminar flow, and significantly improves the mixing efficiency of high-viscosity fluids.

[0019] This invention dynamically adjusts the reciprocating speed, reciprocating frequency, reciprocating stroke, and stirring paddle rotation speed through a control device. It can optimize the stirring parameters in real time according to the changes in the viscosity of the working fluid and the stirring torque, ensuring that good stirring effect and mixing efficiency can be maintained under different working conditions.

[0020] This invention employs a reciprocating mechanism that combines a ball screw and a linear guide rail, resulting in high transmission accuracy and smooth operation. It enables the stirring mechanism to achieve precise reciprocating motion at any speed and position within the stroke range of the ball screw.

[0021] The control device of this invention can generate control signals according to a preset supermixing sequence or chaotic mapping algorithm, so that the reciprocating motion of the stirring mechanism and the rotational motion of the stirring paddle change non-periodically, forming a chaotic mixing flow field in the mixing tank, and further enhancing the mixing effect. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the lead screw reciprocating mechanism of the present invention; Figure 3 This is a schematic diagram of the stirring mechanism of the present invention.

[0023] In the diagram: 1. Lead screw reciprocating mechanism; 2. Stirring mechanism; 3. Support; 4. Stirring tank; 5. Lead screw rotary motor; 6. Motor mounting plate; 7. Fixed end support; 8. Ball screw; 9. Linear slide rail; 10. Lead screw nut; 11. Stirring mechanism mounting plate; 12. Support end support; 13. First coupling; 15. Slider; 16. Connecting block; 17. L-shaped mounting plate; 18. Stirring motor; 19. Second coupling; 20. Bearing support; 21. Bearing support mounting bracket; 22. Stirring paddle. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Reference Figures 1 to 3 The present invention provides a reciprocating stirred reactor suitable for high viscosity fluids, comprising: Support 3 mainly serves to install and support various parts of the mechanism. Its specific form and size can be adjusted or redesigned according to the actual mixing conditions. The mixing tank 4 is located at the bottom of the support 3 and is used to hold the working medium to be mixed. The lead screw reciprocating mechanism 1 is installed above the bracket 3, and its lead screw axis is perpendicular to the upper surface of the bracket 3; The stirring mechanism 2 is mounted on the screw reciprocating mechanism 1 and includes a stirring motor 18 and a stirring blade 22. The stirring motor 18 drives the stirring blade 22 to rotate around its own axis. The control device is signal-connected to the lead screw reciprocating mechanism 1 and the stirring mechanism 2; Among them, the screw reciprocating mechanism 1 drives the stirring mechanism 2 to perform linear reciprocating motion along the screw axis, so that the stirring paddle 22 can reciprocate relative to the support 3 within the screw stroke range while the stirring paddle 22 rotates. The control device is configured to dynamically adjust the reciprocating motion parameters of the stirring mechanism 2 based on the viscosity parameters of the working fluid in the stirring tank 4 and / or the real-time stirring torque. The reciprocating motion parameters include at least one or more of the reciprocating speed, reciprocating frequency, and reciprocating stroke.

[0027] In this embodiment, the screw reciprocating mechanism 1 includes a profile frame, a screw rotary motor 5, a ball screw 8, a screw nut 10, a linear guide rail 9, and a slider 15. The profile frame is preferably made of 2080 aluminum alloy profile. Each component is installed on the 2080 aluminum alloy profile by screws and T-nuts. The screw rotary motor 5 is installed on the upper end of the profile frame by a motor mounting plate 6. Its output shaft is connected to the ball screw 8 by a first coupling 13. The upper end of the ball screw 8 is fixed by a fixed end support 7, and the lower end is fixed by a support end support 12 to ensure axial positioning and radial support of the ball screw 8 during rotation. The linear guide rail 9 is installed on both sides of the ball screw 8 and fixed to the profile frame. The slider 15 is slidably set on the linear guide rail 9. The screw nut 10 and the slider 15 are jointly installed on a stirring mechanism mounting plate 11. The slider 15 and the stirring mechanism mounting plate 11 are connected by a connecting block 16.

[0028] During operation, the lead screw rotary motor 5 drives the ball screw 8 to rotate via the first coupling 13. The rotational motion of the ball screw 8 is converted into linear motion by the lead screw nut 10, which in turn drives the stirring mechanism mounting plate 11 to move along the axis of the ball screw. The linear guide rail 9 and the slider 15 provide guidance and support for the movement of the stirring mechanism mounting plate 11, ensuring smooth movement and precise positioning. The control device controls the forward and reverse rotation and the speed of the lead screw rotary motor 5 to enable the stirring mechanism 2 to reciprocate within the stroke range of the ball screw 8 at a set speed, a set frequency, and a set stroke. Specifically, when the lead screw rotary motor 5 rotates forward, the stirring mechanism mounting plate 11 drives the stirring mechanism 2 to move upward; when the lead screw rotary motor 5 rotates in reverse, the stirring mechanism mounting plate 11 drives the stirring mechanism 2 to move downward. By adjusting the speed of the lead screw rotary motor 5, the speed of the reciprocating motion can be controlled; by controlling the switching frequency of forward and reverse rotation, the frequency of the reciprocating motion can be controlled; and by controlling the duration or number of rotations of the forward and reverse rotation, the stroke of the reciprocating motion can be controlled.

[0029] In this embodiment, the stirring mechanism 2 further includes an L-shaped mounting plate 17, a bearing support 20, and a bearing support mounting frame 21. The L-shaped mounting plate 17 is mounted on the stirring mechanism mounting plate 11 and reciprocates together with the stirring mechanism mounting plate 11. The stirring motor 18 is mounted on the L-shaped mounting plate 17. The bearing support mounting frame 21 is fixedly connected to the L-shaped mounting plate 17. The bearing support 20 is mounted on the bearing support mounting frame 21 and is used to radially support the stirring paddle 22. The stirring paddle 22 and the output shaft of the stirring motor 18 are connected through a second coupling 19 to transmit power.

[0030] The output shaft of the stirring motor 18 is connected to the upper end of the stirring paddle 22 via a second coupling 19. The lower end of the stirring paddle 22 extends into the mixing tank 4 through a bearing support 20. The bearing support 20 provides radial support for the stirring paddle 22, preventing it from wobbling during rotation and ensuring the stability of its operation. The type of stirring paddle 22 can be selected according to the actual mixing conditions, such as axial flow blades, radial flow blades, ribbon blades, or anchor blades, to meet the mixing requirements of fluids with different viscosities. During operation, the stirring motor 18 drives the stirring paddle 22 to rotate around its own axis, mixing the working fluid in the mixing tank 4. At the same time, the entire stirring mechanism 2 reciprocates up and down with the screw reciprocating mechanism 1, causing the stirring paddle 22 to move up and down within the mixing tank 4 while rotating, thus achieving dynamic changes in the mixing area.

[0031] In this embodiment, the control device is configured to control the forward and reverse rotation and speed of the lead screw rotary motor 5 to realize the stirring mechanism 2 to reciprocate within the stroke range of the ball screw 8 at a set speed, a set frequency and a set stroke.

[0032] In this embodiment, the control device is configured to control the stirring motor 18 to operate in a variable speed mode or an intermittent mode, so that the rotational speed of the stirring paddle 22 changes dynamically with the change of the reciprocating position of the stirring mechanism 2.

[0033] In one specific embodiment, when the stirring mechanism 2 moves to the upper or lower reversing position of the reciprocating stroke, the control device controls the stirring motor 18 to reduce its speed or stop briefly, in order to reduce the impact load during reversal and extend the service life of the equipment. When the stirring mechanism 2 is in the middle region of the reciprocating stroke, the control device controls the stirring motor 18 to run at a higher speed, in order to enhance the stirring intensity in that region.

[0034] In another specific embodiment, the control device controls the stirring motor 18 to operate according to a preset variable speed curve, such as a sine wave, square wave, or triangular wave, so that the rotational speed of the stirring paddle 22 changes periodically or non-periodically with time. Variable speed stirring can disrupt the periodicity of the flow field and produce a chaotic mixing effect in laminar flow, which is beneficial for eliminating mixing isolation zones.

[0035] In another specific embodiment, the control device controls the stirring motor 18 to operate intermittently, that is, the stirring motor 18 alternately runs and stops according to a set start-stop cycle. Intermittent stirring allows the fluid to redistribute during the stop period, producing a stronger mixing effect upon restarting, which helps to improve mixing efficiency.

[0036] In this embodiment, the control device is configured to increase the reciprocating speed or decrease the reciprocating stroke when the viscosity of the working fluid in the mixing tank 4 increases, and to reduce the reciprocating frequency when the stirring torque increases, so as to maintain the stability of the stirring process and the mixing efficiency.

[0037] In this embodiment, the control device is further configured to: acquire real-time viscosity data of the working fluid in the mixing tank 4 and / or real-time torque data of the stirring motor 18, and perform closed-loop feedback adjustment of the reciprocating motion parameters based on the real-time viscosity data and / or real-time torque data.

[0038] Specifically, the control device acquires real-time viscosity data of the working fluid in the mixing tank 4 and / or real-time torque data of the stirring motor 18, and performs closed-loop feedback adjustment of the reciprocating motion parameters based on the real-time viscosity data and / or real-time torque data. Viscosity data can be acquired through an online viscometer, and torque data can be indirectly acquired through parameters such as the current and power of the stirring motor 18, or directly acquired through a torque sensor mounted on the stirring shaft. When an increase in working fluid viscosity is detected, it indicates that the fluid's flowability has deteriorated, requiring stronger stirring to maintain the mixing effect. At this time, the control device increases the reciprocating speed, allowing the stirring paddle 22 to pass through fluid layers of different heights more quickly, enhancing convective mixing; or it reduces the reciprocating stroke, allowing the stirring paddle 22 to reciprocate at a higher frequency within a smaller range, generating stronger shearing and mixing effects in localized areas. When an increase in stirring torque is detected, it indicates increased stirring resistance, possibly due to increased viscosity or increased solid content. At this time, the control device appropriately reduces the reciprocating frequency to avoid motor overload while maintaining the stability of the stirring process. The aforementioned closed-loop feedback control strategy can optimize the mixing parameters in real time according to changes in the working fluid state, ensuring good mixing results under different working conditions, while avoiding equipment overload and energy waste.

[0039] In this embodiment, the control device is configured to generate control signals according to a preset hyperchaotic sequence or chaotic mapping algorithm. The control signals are used to drive the lead screw rotary motor 5 and / or the stirring motor 18, so that the reciprocating motion of the stirring mechanism 2 and the rotational motion of the stirring paddle 22 change non-periodically, so as to form a chaotic mixing flow field in the mixing tank 4.

[0040] The essence of chaotic mixing lies in breaking the periodicity or symmetry of conventional stirring methods by disrupting the periodicity of fluid particle trajectories through dynamic perturbation. Common chaotic mixing methods include temporal chaotic mixing (such as forward and reverse stirring, variable speed stirring, and chaotic rotational speed stirring) and spatial chaotic mixing (such as eccentric stirring, misaligned stirring, and reciprocating stirring). This invention combines reciprocating stirring with chaotic control, creating a chaotic mixing flow field within the stirred tank through non-periodic reciprocating and rotational motions, thereby effectively eliminating mixing isolation zones and improving mixing efficiency.

[0041] In one specific implementation, the control device incorporates a hypermixing sequence (such as a chaotic mapping algorithm like Logistic or Henon mapping) to calculate the control command for the next moment in real time based on parameters such as the current time, reciprocating position, or stirring torque. This causes the rotational speed and direction of the lead screw motor 5 and the rotational speed of the stirring motor 18 to exhibit non-periodic changes. For example, the control device can control the rotational speed of the lead screw motor 5 to change according to a chaotic sequence, causing the speed and frequency of the reciprocating motion to fluctuate randomly; simultaneously, it can control the rotational speed of the stirring motor 18 to change according to another chaotic sequence, causing the rotational speed of the impeller 22 to fluctuate randomly. The superposition of these two non-periodic motions can generate a complex flow field structure within the mixing tank, enhancing the chaotic mixing effect.

[0042] In another specific embodiment, the control device can independently control the lead screw rotating motor 5 or the stirring motor 18 to operate according to the chaotic mapping algorithm, while the other motor operates in a conventional manner, which can also produce a chaotic mixing effect to a certain extent.

[0043] In this embodiment, the control device is a PLC controller, but it can also be other types of industrial controllers, such as microcontrollers, embedded systems, industrial computers, etc.

[0044] In one specific embodiment, the control device is a PLC controller. The PLC receives signals from an online viscometer and / or torque sensor via its analog input module, and controls the drivers of the lead screw rotary motor 5 and the stirring motor 18 via its analog or digital output modules. The PLC controller internally stores control programs, including calculation logic for reciprocating motion parameters, closed-loop feedback control algorithms, and chaotic mapping algorithms. The PLC controller also has a human-machine interface (such as a touchscreen), allowing operators to set stirring parameters (such as reciprocating speed range, reciprocating frequency range, reciprocating stroke, and stirring speed range) and monitor the equipment's operating status (such as current reciprocating position, real-time viscosity, and real-time torque).

[0045] In another specific embodiment, the control device is an industrial computer running dedicated stirring control software. The industrial computer acquires sensor signals such as viscosity and torque via a data acquisition card, and controls the motor driver via a motion control card or communication interface (such as RS485, EtherCAT, etc.). Industrial computers have more powerful computing capabilities and richer software resources, making them suitable for implementing complex chaotic mapping algorithms and data analysis functions.

[0046] In another specific implementation, the control device is an embedded system (such as an ARM processor, DSP processor, etc.), which has the advantages of small size, low power consumption and low cost, and is suitable for cost-sensitive or space-constrained application scenarios.

[0047] In this embodiment, a temperature regulating device is provided on the outside of the mixing tank 4 to regulate the temperature of the working fluid inside the mixing tank 4.

[0048] In one specific embodiment, the temperature regulating device is a jacket installed on the outer wall of the mixing tank 4. A heating medium (such as hot water or hot oil) or a cooling medium (such as cooling water or chilled brine) is circulated through the jacket to regulate the temperature of the working medium inside the mixing tank through heat exchange. The jacket is provided with a medium inlet and a medium outlet, which are respectively connected to an external heating / cooling system.

[0049] In another specific embodiment, the temperature regulating device is a coil installed inside the mixing tank 4. A heating or cooling medium is circulated through the coil, and heat exchange occurs between the coil and the working medium through the coil wall. The coil can be installed near the inner wall or at the bottom of the mixing tank, and the specific location can be optimized according to the structure of the mixing tank and the type of agitator.

[0050] In another specific embodiment, the temperature regulating device is an electric heating device, such as an electric heating belt or electric heating plate installed on the outer wall or bottom of the mixing tank 4, which directly heats the mixing tank and the internal working fluid through electric energy.

[0051] The temperature regulation device is connected to the control device via a signal connection. The control device can automatically adjust the flow rate of the heating / cooling medium or the power of the electric heating based on the setpoint of the working fluid's temperature and real-time temperature feedback, thereby achieving precise temperature control of the working fluid within the stirring tank 4. For certain temperature-sensitive high-viscosity fluid reaction processes, precise temperature control is crucial for ensuring reaction efficiency and product quality.

[0052] In this embodiment, the mixing tank 4 can be designed in various forms according to the actual working conditions, such as cylindrical, conical or irregular shapes, and the shape and size of the support 3 can be redesigned accordingly, and the size of the stirring paddle 22 and the reciprocating stroke can be adjusted.

[0053] In one specific implementation, for small-batch, high-precision experimental or production scenarios, the mixing tank 4 is designed as a small cylindrical transparent glass tank, which facilitates observation of the flow field changes and mixing state during the mixing process. The support 3 is correspondingly designed as a small tabletop structure, the stroke of the lead screw reciprocating mechanism 1 is short, and the size of the stirring paddle 22 is small.

[0054] In another specific embodiment, for large-scale industrial production scenarios, the mixing tank 4 is designed as a large stainless steel cylindrical tank with a removable lid on top for easy installation and maintenance of the mixing mechanism. The support 3 is designed as a floor-mounted frame structure with sufficient strength and rigidity to support the large mixing tank and mixing mechanism. The screw reciprocating mechanism 1 has a long stroke, and the mixing paddle 22 is large in size to meet the mixing requirements of large-capacity working fluids.

[0055] In another specific embodiment, for non-cylindrical irregularly shaped mixing tanks (such as conical tanks, square tanks, etc.), the shape and size of the support 3 are adaptively designed according to the shape of the mixing tank to ensure that the screw axis of the screw reciprocating mechanism 1 is perpendicular to the upper surface of the support, so that the stirring paddle 22 can smoothly extend into the mixing tank and achieve reciprocating motion. The shape and size of the stirring paddle 22 are also optimized according to the internal space of the mixing tank to ensure that it does not interfere with the tank wall during reciprocating motion.

[0056] The material of the mixing tank 4 can be selected according to the chemical properties of the working fluid, such as stainless steel, glass, enamel, polytetrafluoroethylene lining, etc., to meet the requirements of different working conditions such as corrosion, temperature, and pressure.

[0057] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, 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 invention.

[0058] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A reciprocating stirred reactor suitable for high-viscosity fluids, characterized in that, include: support (3); A mixing tank (4) is located at the bottom of the support (3) and is used to hold the working medium to be mixed. A lead screw reciprocating mechanism (1) is installed above the bracket (3), and its lead screw axis is perpendicular to the upper surface of the bracket (3); The stirring mechanism (2) is installed on the screw reciprocating mechanism (1) and includes a stirring motor (18) and a stirring paddle (22). The stirring motor (18) drives the stirring paddle (22) to rotate around its own axis. The control device is signal-connected to the lead screw reciprocating mechanism (1) and the stirring mechanism (2); The lead screw reciprocating mechanism (1) drives the stirring mechanism (2) to perform linear reciprocating motion along the lead screw axis, thereby realizing the reciprocating motion of the stirring paddle (22) relative to the support (3) within the lead screw stroke range while the stirring paddle (22) rotates. The control device is configured to dynamically adjust the reciprocating motion parameters of the stirring mechanism (2) according to the viscosity parameters of the working fluid in the stirring tank (4) and / or the real-time stirring torque, wherein the reciprocating motion parameters include at least one or more of the reciprocating speed, reciprocating frequency and reciprocating stroke.

2. The reciprocating stirred reactor suitable for high-viscosity fluids according to claim 1, characterized in that, The lead screw reciprocating mechanism (1) includes a profile frame, a lead screw rotary motor (5), a ball screw (8), a lead screw nut (10), a linear slide rail (9), and a slider (15). The lead screw rotary motor (5) is mounted on the upper end of the profile frame via a motor mounting plate (6). Its output shaft is connected to the ball screw (8) via a first coupling (13). The upper end of the ball screw (8) is fixed via a fixed end support (7), and the lower end is fixed via a support end support (12). The linear slide rail (9) is mounted on both sides of the ball screw (8) and fixed to the profile frame. The slider (15) is slidably mounted on the linear slide rail (9). The lead screw nut (10) and the slider (15) are mounted together on a stirring mechanism mounting plate (11). The slider (15) and the stirring mechanism mounting plate (11) are connected via a connecting block (16).

3. A reciprocating stirred reactor suitable for high-viscosity fluids according to claim 2, characterized in that, The stirring mechanism (2) also includes an L-shaped mounting plate (17), a bearing support (20), and a bearing support mounting bracket (21). The L-shaped mounting plate (17) is mounted on the stirring mechanism mounting plate (11), the stirring motor (18) is mounted on the L-shaped mounting plate (17), the bearing support mounting bracket (21) is fixedly connected to the L-shaped mounting plate (17), the bearing support (20) is mounted on the bearing support mounting bracket (21) and is used to radially support the stirring paddle (22). The stirring paddle (22) and the output shaft of the stirring motor (18) are connected through a second coupling (19) to transmit power.

4. A reciprocating stirred reactor suitable for high-viscosity fluids according to claim 2, characterized in that, The control device is configured to: control the forward and reverse rotation and speed of the lead screw rotary motor (5) to realize the stirring mechanism (2) to reciprocate within the stroke range of the ball screw (8) at a set speed, a set frequency and a set stroke.

5. A reciprocating stirred reactor suitable for high-viscosity fluids according to claim 1, characterized in that, The control device is configured to control the stirring motor (18) to operate in a variable speed mode or an intermittent mode, so that the rotation speed of the stirring paddle (22) changes dynamically with the change of the reciprocating position of the stirring mechanism (2).

6. A reciprocating stirred reactor suitable for high-viscosity fluids according to claim 1, characterized in that, The control device is configured to increase the reciprocating speed or decrease the reciprocating stroke when the viscosity of the working fluid in the mixing tank (4) increases, and to reduce the reciprocating frequency when the stirring torque increases, so as to maintain the stability of the stirring process and the mixing efficiency.

7. A reciprocating stirred reactor suitable for high-viscosity fluids according to claim 2, characterized in that, The control device is configured to generate a control signal according to a preset hyperchaotic sequence or chaotic mapping algorithm. The control signal is used to drive the screw rotary motor (5) and / or the stirring motor (18) so that the reciprocating motion of the stirring mechanism (2) and the rotational motion of the stirring paddle (22) change non-periodically, so as to form a chaotic mixing flow field in the stirring tank (4).

8. A reciprocating stirred reactor suitable for high-viscosity fluids according to claim 1, characterized in that, The control device is also configured to: acquire real-time viscosity data of the working fluid in the mixing tank (4) and / or real-time torque data of the stirring motor (18), and perform closed-loop feedback adjustment of the reciprocating motion parameters based on the real-time viscosity data and / or real-time torque data.

9. A reciprocating stirred reactor suitable for high-viscosity fluids according to claim 1, characterized in that, The control device is a PLC controller.

10. A reciprocating stirred reactor suitable for high-viscosity fluids according to claim 1, characterized in that, The mixing tank (4) is equipped with a temperature regulating device on the outside, which is used to regulate the temperature of the working medium inside the mixing tank (4).

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