A new ultrasonic stirring reaction kettle

Abstract

The utility model belongs to the technical field of reaction kettle, concretely is a kind of novel ultrasonic stirring reaction kettle, including upper head, lower head and kettle body, the top of upper head is provided with transmission device, transmission device includes the stirring shaft of inreaching reaction kettle inside, multiple layers of stirring paddle are separately arranged on stirring shaft along the axial direction, and ultrasonic wave generating structure is integrally formed on stirring paddle and / or stirring shaft, and ultrasonic wave generating structure is electrically connected with ultrasonic and stirring control generator by power cord. The application is driven by transmission device to drive multiple layers of stirring paddle to rotate, and the ultrasonic wave generating mechanism integrated on stirring shaft or stirring paddle rotates synchronously with stirring shaft, so that the flow path of ultrasonic vibration effect covering material is covered, when processing high viscosity material, the ultrasonic wave structure on the surface of stirring paddle directly acts on material shear layer, and the dispersion effect is enhanced;And in the cleaning condition, the ultrasonic vibration of stirring paddle and stirring shaft itself can strip the residues adhered to its surface.

Description

Technical Field

[0001] This utility model belongs to the field of reaction vessel technology, specifically a novel ultrasonic stirring reaction vessel. Background Technology

[0002] Stirred chemical reaction vessels are widely used in chemical, pharmaceutical, and food industries. Their main function is to provide a controlled environment for chemical reactions, enabling efficient material mixing, reaction rate control, and product quality assurance. With the rapid development of the chemical industry, the use of various new raw materials, and the continuous improvement of product standards, stirred reaction vessels face increasingly complex technical conditions and require increasingly higher stirring performance.

[0003] In the new energy field, especially in the production of lithium battery electrolytes, reaction vessels need to handle a variety of poorly soluble materials, and traditional stirring methods have significant limitations. For example, ternary lithium battery electrolytes often contain dozens of additives. With the development of various functional additives, the requirements for stirring processes in reaction vessels are becoming increasingly stringent. Some additives are difficult to dissolve and prone to clumping. Existing process conditions often only allow for extended stirring time or other pre-dissolving processes, leading to increased production costs and wasted capacity. Furthermore, because the products inside the reaction vessel need to be frequently switched, the interior of the vessel requires cleaning. Cleaning the inner surface of larger reaction vessels is often done by rinsing, lacking an effective and convenient method for cleaning stubborn materials in the dead corners of the vessel.

[0004] Although CN203494509U discloses a scheme for installing an ultrasonic transducer at the top of the reactor, this design suffers from problems such as a limited ultrasonic action area and reduced stirring efficiency. Specifically, the ultrasonic energy is concentrated in the top region of the reactor, failing to uniformly cover the entire reaction space; the synergy between the ultrasonic transducer and the stirring paddle is poor, potentially affecting fluid flow; and the low ultrasonic energy transfer efficiency makes it difficult to achieve uniform ultrasonic treatment throughout the entire reactor. These problems severely limit the effectiveness of the reactor under complex operating conditions. Utility Model Content

[0005] This invention provides a novel ultrasonic stirred reactor. By integrating the ultrasonic generating structure into the stirring paddle, stirring shaft, and lower end cap, it can achieve uniform distribution and efficient transmission of ultrasonic energy within the reactor, solving the problems of limited ultrasonic action area and low stirring efficiency in traditional reactors.

[0006] The present invention adopts the following technical solution:

[0007] A novel ultrasonic stirred reactor includes an upper head, a lower head, and a vessel body connecting the upper head and the lower head, wherein:

[0008] The top of the upper head is provided with a mounting frame, and a transmission device is installed on the mounting frame. The transmission device includes a stirring shaft that extends into the reactor. Multiple layers of stirring blades are arranged axially along the stirring shaft. An ultrasonic generating structure is integrally formed on the stirring blades and / or the stirring shaft. The ultrasonic generating structure is electrically controlled by an external ultrasonic and stirring control generator.

[0009] Furthermore, the impeller has a multi-layer structure, consisting of an impeller skeleton layer, a backing layer, a piezoelectric layer, and a metal shell from the inside out. The piezoelectric layer is electrically connected to an external ultrasonic and stirring control generator via a power line.

[0010] Furthermore, the stirring shaft is a hollow shaft, and the power cord is hidden inside the hollow cavity of the stirring shaft.

[0011] Furthermore, an arc-shaped inner cavity is formed inside the lower head, and the bottom stirring paddle extends into the arc-shaped inner cavity and is close to the bottom of the arc-shaped inner cavity.

[0012] Furthermore, the transmission device also includes a motor, a reducer, and a coupling connected in sequence. The coupling is connected to the stirring shaft, and the motor is electrically connected to the ultrasonic and stirring control generator.

[0013] Furthermore, the lower end cap is integrally formed with an ultrasonic generating structure, which includes a piezoelectric layer and a backing layer. The backing layer is located below the piezoelectric layer, and the piezoelectric layer is electrically connected to the ultrasonic and stirring control generator via a power line.

[0014] Furthermore, the backing layer may be made of epoxy resin or tungsten powder.

[0015] Furthermore, the piezoelectric layer can be made of PVDF polymer materials.

[0016] Furthermore, a jacket is provided on the outside of the reactor, forming a chamber between the jacket and the reactor. A circulating water inlet is provided on one side of the top of the jacket, and a circulating water outlet is provided at the bottom of the jacket. Coolant is introduced into the chamber through the circulating water inlet.

[0017] Furthermore, the ultrasonic generating structures on the multi-layer impeller and / or stirring shaft are individually electrically connected to the ultrasonic and stirring control generator via power lines.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] (1) The ultrasonic stirring reactor of this invention drives the stirring shaft to rotate through a transmission device, and the ultrasonic generating structure integrated on the stirring shaft or stirring paddle rotates synchronously with the stirring shaft, so that the ultrasonic vibration effect covers the flow path of the material, realizing the uniform distribution and efficient transmission of ultrasonic energy in the reactor. When processing high viscosity materials, the ultrasonic structure on the surface of the stirring paddle can directly act on the shear layer of the material, enhancing the dispersion effect. Moreover, in the cleaning condition, the ultrasonic vibration of the stirring paddle and stirring shaft itself can peel off the residues attached to their surfaces, without the need for additional cleaning devices.

[0020] (2) The ultrasonic stirring reactor of this utility model has an ultrasonic generating structure integrated in the lower head, so that the ultrasonic energy can be directly applied to the bottom of the arc-shaped inner cavity where the material is most severely attached, which can disperse the insoluble matter and agglomerated material that has settled to the bottom and promote dissolution. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the ultrasonic stirring reactor of this utility model;

[0023] Figure 2 This is a multi-layer structure diagram of the stirring paddle of the ultrasonic stirring reactor of this utility model;

[0024] Wherein: 1-Upper head, 2-Lower head, 21-Arc-shaped inner cavity, 3-Bottle body, 4-Mounting frame, 5-Stirring shaft, 6-Stirring paddle, 61-Stirring paddle skeleton layer, 62-Backing layer, 63-Piezoelectric layer, 64-Metal shell, 7-Bottom stirring paddle, 8-Motor, 9-Ultrasonic and stirring control generator, 10-Jacket, 11-Cavity, 12-Circulating water inlet, 13-Circulating water outlet. Detailed Implementation

[0025] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] The following is in conjunction with the appendix Figure 1 To be continued Figure 2 The present invention will be described in detail with specific embodiments.

[0027] This utility model provides a novel ultrasonic stirred reactor, including an upper head 1, a lower head 2, and a reactor body 3 connected between the upper head 1 and the lower head 2. The upper head 1 has a mounting frame 4 at its top, which serves as a support structure. A transmission device is mounted on the mounting frame 4. The transmission device includes a stirring shaft 5 extending into the reactor. Multiple layers of stirring paddles 6 are spaced axially along the stirring shaft 5. An ultrasonic generating structure is integrally formed on the stirring paddles 6 and / or the stirring shaft 5. That is, the ultrasonic generating structure is integrated into the stirring paddles 6 and / or the stirring shaft 5. The ultrasonic generating structure can generate high-frequency mechanical vibrations, and it is electrically connected to an external ultrasonic and stirring control generator 9 via a power cord.

[0028] During operation, the reactor of this application is driven by a transmission device to rotate the stirring shaft 5, which in turn drives the multi-layered stirring paddles 6. The ultrasonic generating structure integrated on the stirring shaft 5 or stirring paddles 6 rotates synchronously with the stirring shaft 5, allowing the ultrasonic vibration effect to cover the flow path of the material. This achieves uniform distribution and efficient transmission of ultrasonic energy within the reactor, enabling ultrasonic pulverization of suspended, floating, or settled insoluble substances, accelerating their dissolution, homogenization, or dispersion. This achieves an organic combination of ultrasound and stirring without altering the overall structure of the reactor or affecting the stirring paddle's turbulence-inducing mechanism. Furthermore, when processing high-viscosity materials, the ultrasonic generating structure on the surface of the stirring paddles 6 directly acts on the material's shear layer, enhancing the dispersion effect. Simultaneously, during cleaning, the ultrasonic vibration of the stirring paddles 6 and stirring shaft 5 can remove residues adhering to their surfaces, eliminating the need for additional cleaning devices. This application cleverly integrates the ultrasonic generating structure with the stirring paddles 6 or stirring shaft 5, allowing ultrasonic energy to be dynamically distributed throughout the reaction area with the movement of the stirring shaft 5, effectively improving the dispersion efficiency of poorly soluble materials. Additionally, in terms of cleaning and maintenance, the self-cleaning function is achieved through the self-vibration of the stirring paddles 6 and stirring shaft 5.

[0029] In some embodiments, see Figure 2The impeller 6 has a multi-layered structure, consisting of an impeller frame layer 61, a backing layer 62, a piezoelectric layer 63, and a metal shell 64, arranged from the inside out. The piezoelectric layer 63 is electrically connected to the external ultrasonic and stirring control generator 9 via a power line. The impeller frame layer 61 is a rigid structure supporting the impeller shape, maintaining the mechanical strength of the impeller 6 and bearing its rotational stress. The backing layer 62 is a damping material layer attached to the outer surface of the impeller frame layer 61, primarily absorbing the sound waves from the piezoelectric layer 63, suppressing ringing effects, and preventing the leakage of ultrasonic waves. The piezoelectric layer 63 is a functional material layer covering the outside of the backing layer 62, converting electrical energy into ultrasonic vibrations through the inverse piezoelectric effect. The metal shell 64 is a protective layer wrapped around the piezoelectric layer 63, typically made of stainless steel, used to protect the internal structure and provide a corrosion-resistant and wear-resistant surface.

[0030] In the above structure, the impeller frame layer 61 serves as the main load-bearing structure, driving the multi-layer impeller 6 to move as a whole when the stirring shaft 5 rotates. The backing layer 62 absorbs reverse vibrations, reducing energy loss, while the piezoelectric layer 63 generates high-frequency mechanical vibrations under the excitation of the electrical signal output by the ultrasonic and stirring control generator 9. The vibration waves are uniformly transmitted into the reactor through the waveguide effect of the metal shell 64. The structural composition of the impeller 6 in this application allows the ultrasonic energy field to dynamically cover the reaction area with the rotation of the impeller 6, eliminating the radiation blind zone of traditional top-fixed ultrasonic transducers. Furthermore, the synchronous release of ultrasonic waves by the impeller 6 and the stirring shaft 5 during rotation can directly act on the material accumulation area, accelerating the dispersion of insoluble materials. Of course, whether to activate ultrasonic waves during stirring and the control of the effective range of ultrasonic waves are determined according to the material conditions, and this application does not impose specific limitations.

[0031] In some embodiments, the stirring shaft 5 is a hollow shaft, and the power cable is hidden inside the hollow cavity of the stirring shaft 5. The hollow cavity of the stirring shaft 5 serves as a channel for accommodating the power cable. During the rotation of the stirring shaft 5, the power cable remains within a closed space and will not interfere with the stirring paddle 6 or the fluid. Furthermore, when cleaning the reactor, since the power cable is not exposed in the stirring space or on the surface of the stirring components, residual materials cannot adhere to the cable surface. The inner wall of the reactor can be directly rinsed or chemically cleaned without affecting the service life of the ultrasonic generator structure, thus simplifying the cleaning and maintenance process.

[0032] In some embodiments, an arc-shaped inner cavity 21 is formed inside the lower end cap 2. The arc-shaped inner cavity 21 is a continuous curved surface space formed inside the lower end cap 2. Its radius of curvature can match the rotation trajectory of the bottom stirring paddle 7. The bottom stirring paddle 7 extends into the arc-shaped inner cavity 21 and is close to the bottom of the arc-shaped inner cavity 21. Optionally, the minimum distance between the bottom of the bottom stirring paddle 7 and the arc-shaped inner cavity 21 is controlled within the range of 5-10 mm to ensure that the shearing action covers the entire bottom area.

[0033] Specifically, the continuous curved surface structure of the arc-shaped inner cavity 21 enables the fluid to form a circumferential flow during stirring, eliminating the stagnant flow zone formed at the edge area in traditional flat-bottom structures. The bottom-level agitator 7 extends to the bottom of the arc-shaped inner cavity 21, allowing the shear flow generated by the blades to directly act on the lowest point of the curved surface, forcibly driving the deposited material into the mainstream area. The geometric adaptation design of the agitator 6 and the arc-shaped inner cavity 21 allows the fluid to form a spiral upward motion under the guidance of the curved surface, enhancing the turbulence intensity in the bottom area. During the cleaning process, the continuous curved surface feature of the arc-shaped inner cavity 21 avoids residue accumulation caused by right-angle structures, and the flushing water flow along the curved surface can carry away the attached material. The continuous curved surface structure of the arc-shaped inner cavity 21 of this application significantly reduces the probability of stubborn residue adhesion during the cleaning process, improving the cleaning efficiency of the equipment.

[0034] Furthermore, the transmission device also includes a motor 8, a reducer, and a coupling connected in sequence. The coupling is connected to the stirring shaft 5, and the motor 8 is electrically connected to the ultrasonic and stirring control generator 9. The rotational power output by the motor 8 is adjusted to a preset speed by the reducer and then transmitted to the stirring shaft 5 through the coupling, driving the multi-layer stirring paddle 6 to rotate. A data exchange channel is established between the motor 8 and the ultrasonic and stirring control generator 9 through a circuit connection, allowing the real-time speed parameters of the stirring shaft 5 to be transmitted to the ultrasonic and stirring control generator 9. The ultrasonic and stirring control generator 9 dynamically adjusts the frequency and power of the electrical signal output to the ultrasonic generating structure according to the received speed parameters, so that the intensity of the ultrasonic vibration is matched with the shear rate of the stirring paddle 6. For example, when the stirring speed increases, resulting in increased fluid shear force, the ultrasonic power can be reduced accordingly to avoid energy waste; when the stirring speed decreases, resulting in decreased material mixing efficiency, the ultrasonic power can be automatically increased to compensate for the mixing effect. Meanwhile, because the ultrasonic and stirring control generator 9 integrates stirring control and ultrasonic control, it can control the frequency and start / stop of the ultrasonic waves, as well as the frequency and start / stop of the stirring in the reactor. It can also more conveniently and quickly adjust the frequency of the stirring motor and the vibration frequency of the ultrasonic waves.

[0035] In some embodiments, an ultrasonic generating structure is integrally formed on the lower head 2. This ultrasonic generating structure includes a piezoelectric layer and a backing layer, with the backing layer located below the piezoelectric layer. The piezoelectric layer is electrically connected to the ultrasonic and stirring control generator 9 via a power line. In other words, the piezoelectric layer and the backing layer are directly embedded into the body structure of the lower head 2. This application integrates an ultrasonic generating structure within the lower head 2, allowing ultrasonic energy to directly act on the bottom of the arc-shaped inner cavity where material adhesion is most severe. This can disperse insoluble and agglomerated materials at the bottom, promoting dissolution. Of course, in other embodiments, an ultrasonic generating structure can also be integrally formed on the inner wall of the reactor body 3, achieving omnidirectional ultrasonic vibration within the reactor, making the reactor adaptable to the stirring of various materials.

[0036] In a preferred embodiment, the backing layer 62 is made of at least one of epoxy resin, tungsten powder, and graphene. Epoxy resin refers to a polymer material with high damping properties, specifically a cured epoxy resin layer, which can absorb the reverse acoustic wave energy generated by the piezoelectric layer, preventing energy backflow from affecting the piezoelectric layer. Tungsten powder refers to a composite material composed of high-density metal particles, specifically formed by sintering using powder metallurgy, thereby improving the radiation efficiency of ultrasonic energy to the reaction medium. Of course, in other embodiments, the backing layer 62 can also be made of other materials that can absorb the reverse acoustic waves from the piezoelectric layer, suppress ringing effects, and broaden the bandwidth.

[0037] In a preferred embodiment, the piezoelectric layer 63 is made of PVDF polymer material. PVDF polymer material refers to polymer materials with piezoelectric effect. Specifically, PVDF polymer material can be processed into a thin film and adhered to the surface of the metal shell. During the rotation of the stirring shaft 5, the material absorbs mechanical vibration energy through its own flexibility. After being energized, the piezoelectric layer 63 undergoes periodic deformation, causing ultrasonic energy to be concentrated and emitted into the fluid medium surrounding the stirring paddle 6. Of course, in other embodiments, the piezoelectric layer 63 can also be made of other materials, as long as it can generate ultrasonic vibration.

[0038] In some embodiments, a jacket 10 is provided on the outside of the reactor, forming a chamber 11 between the jacket 10 and the reactor. A circulating water inlet 12 is provided on one side of the top of the jacket 10, and a circulating water outlet 13 is provided at the bottom of the jacket 10. Coolant is introduced into the chamber 11 through the circulating water inlet 12. The chamber 11 formed by the jacket 10 and the outer wall of the reactor provides a continuous flow channel for the coolant. After entering the chamber 11 from the top circulating water inlet 12, the coolant flows downward along the inner wall of the jacket 10 under the action of gravity, evenly covering the outer surface of the reactor. Since the ultrasonic generating structure can cause the material inside the reactor to heat up during use, for chemical processes that require precise temperature control, the reactor temperature needs to be regulated (cooled down) through the circulating water in the jacket 10 to avoid the high temperature generated by the ultrasound affecting the quality of the material. Specifically, during the flow process, the coolant absorbs the heat generated inside the reactor and is then discharged to the external circulation system from the bottom circulating water outlet 13. By adjusting the flow rate and temperature of the coolant, the internal temperature of the reactor can be precisely controlled, avoiding localized overheating or temperature fluctuations.

[0039] In some embodiments, the ultrasonic generating structures on the multi-layer impeller 6 and / or stirring shaft 5 are individually electrically connected to the ultrasonic and stirring control generator 9 via power lines. In other words, the ultrasonic generating structures within the reactor are managed in modules, allowing for individual control of the activation or frequency adjustment of the ultrasonic generating structure at a specific location. For example, the upper impeller can apply high-frequency ultrasonic waves to promote the dispersion of surface materials, while the lower impeller uses the same or different frequencies to enhance the dispersion of bottom materials. This solution integrates the ultrasonic generating structures into the multi-layer impeller 6 and stirring shaft 5 and achieves independent control, enabling the ultrasonic energy to be applied directionally to different heights and radial regions, avoiding energy attenuation and interference problems.

[0040] In some specific embodiments, the ultrasonic and stirring control generator 9 uses 10-500kHz. The reactor is divided into 5 separate control modules, namely the first layer stirring paddle, the second layer stirring paddle, the third layer stirring paddle, the bottom stirring paddle and the lower head. The ultrasonic generating structure of each module and the ultrasonic frequency adjustment are controlled separately by the ultrasonic and stirring control generator 9. The motor 8 is a 3kW motor. The preparation vessel is a 50m³ vertical reactor with a jacket function, which can realize temperature adjustment from -20℃ to 50℃. The internal multi-layer structure of the stirring paddle 6 is designed as follows: the stirring paddle skeleton layer 61 (made of 304 stainless steel) is 6mm thick, the backing layer 62 (made of epoxy resin or tungsten powder backing) is 6mm thick, the piezoelectric layer 63 is 1mm thick, and the metal shell layer 64 (made of 304 stainless steel) is 0.5mm thick.

[0041] In other specific embodiments, the ultrasonic and stirring control generator 9 uses 50-400kHz. The reactor is divided into 4 separate control modules, namely the stirring shaft between the first and second stirring paddles, the stirring shaft between the third stirring paddle and the bottom stirring paddle, the lower head 2, and the side wall of the reactor. The ultrasonic generating structure of each module and the ultrasonic frequency adjustment are controlled separately by the ultrasonic and stirring control generator 9. The motor 8 is a 1.5kW motor. The preparation vessel is a 20m³ vertical reactor with a jacket function, which can realize temperature adjustment from -20℃ to 50℃. The multi-layer structure design inside the stirring paddle 6 is as follows: the stirring paddle skeleton layer 61 (made of aluminum alloy or titanium alloy) is 4mm thick, the backing layer 62 (made of graphene modified backing) is 1mm thick, the piezoelectric layer 63 is 2mm thick, and the metal shell layer 64 (made of 304 stainless steel) is 0.5mm thick.

[0042] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A novel ultrasonically stirred reactor, characterized in that, It includes an upper head, a lower head, and a vessel body connected between the upper head and the lower head, wherein: The top of the upper end cap is provided with a mounting frame, and a transmission device is installed on the mounting frame. The transmission device includes a stirring shaft that extends into the interior of the reactor. Multiple layers of stirring blades are arranged axially along the stirring shaft. An ultrasonic generating structure is integrally formed on the stirring blades and / or the stirring shaft. The ultrasonic generating structure is electrically controlled by an external ultrasonic and stirring control generator.

2. The novel ultrasonically stirred reactor according to claim 1, characterized in that, The stirring impeller has a multi-layer structure, which consists of a stirring impeller skeleton layer, a backing layer, a piezoelectric layer, and a metal shell from the inside out. The piezoelectric layer is electrically connected to the external ultrasonic and stirring control generator via a power line.

3. The novel ultrasonically stirred reactor according to claim 2, characterized in that, The stirring shaft is a hollow shaft, and the power cord is hidden inside the hollow cavity of the stirring shaft.

4. The novel ultrasonically stirred reactor according to claim 1, characterized in that, The lower end cap forms an arc-shaped inner cavity, and the bottom stirring paddle extends into the arc-shaped inner cavity and is close to the bottom of the arc-shaped inner cavity.

5. The novel ultrasonically stirred reactor according to claim 1, characterized in that, The transmission device also includes a motor, a reducer and a coupling connected in sequence. The coupling is connected to the stirring shaft and the motor is electrically connected to the ultrasonic and stirring control generator.

6. The novel ultrasonically stirred reactor according to claim 1, characterized in that, The lower end cap is integrally formed with the ultrasonic generating structure, which includes a piezoelectric layer and a backing layer. The backing layer is located below the piezoelectric layer, and the piezoelectric layer is electrically connected to the ultrasonic and stirring control generator via a power line.

7. The novel ultrasonically stirred reactor according to claim 2 or 6, characterized in that, The backing layer is made of epoxy resin or tungsten powder.

8. The novel ultrasonically stirred reactor according to claim 2 or 6, characterized in that, The piezoelectric layer is made of PVDF polymer material.

9. The novel ultrasonically stirred reactor according to claim 1, characterized in that, The reactor is provided with a jacket on the outside, and a chamber is formed between the jacket and the reactor. A circulating water inlet is provided on one side of the top of the jacket, and a circulating water outlet is provided at the bottom of the jacket. Coolant is introduced into the chamber through the circulating water inlet.

10. The novel ultrasonically stirred reactor according to claim 1, characterized in that, The ultrasonic generating structures on the multi-layered stirring impeller and / or the stirring shaft are each individually electrically connected to the ultrasonic and stirring control generator via power lines.

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