Device for synthesizing high-quality nano material by coupling ultrasonic waves with three-dimensional vortex microchannel
By using an ultrasonic-coupled three-dimensional vortex microchannel device, the microfluidic motion is accelerated by aerodynamic impact and vortex blades, and the droplets are pulverized by ultrasonic waves. This solves the problems of low mixing efficiency and easy clogging in traditional microchannel synthesis of nanomaterials, and realizes the efficient and short-process synthesis of high-quality nanomaterials.
Patent Information
- Application Number
- CN202422077217.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-08-27
AI Technical Summary
Traditional microchannel synthesis of nanomaterials suffers from slow mixing and mass transfer rates, is prone to clogging, has a long process, and produces products with large particle sizes and dispersed distribution.
An ultrasonic-coupled three-dimensional vortex microchannel device is used, including a pneumatic impact system, a microchannel device, and a solid-liquid separation system. The vortex blades accelerate the movement of microfluidics, and the ultrasonic waves pulverize the droplets to achieve efficient mixing and separation.
This solved the problem of microchannel clogging, improved mixing efficiency, and enabled the short-process synthesis of high-quality nanomaterials with small particle size and concentrated distribution.
Smart Images
Figure CN223669173U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of device of three-dimensional eddy microchannel synthesis high-quality nanomaterials of ultrasonic coupling, belong to hydrometallurgy technical field. BACKGROUND
[0002] Due to quantum tunneling effect, size effect, surface and boundary effect and coulomb jamming effect and other wonderful characteristics, a large number of nanomaterials with easy to adjust size, structure and composition are widely developed and applied in optoelectronic, environmental materials, biological imaging, agricultural industry and drug delivery and other fields. High-quality nanomaterials generally require to meet various high-end application requirements in particle size, morphology and surface characteristics.
[0003] Because of the advantages of simple equipment, no harsh physical conditions such as high vacuum, easy to enlarge, etc., and the advantages in particle morphology size control, product composition and uniformity control, etc., the precipitation method is widely used in the synthesis of high-quality nanomaterials. However, the traditional reaction precipitation process is often carried out in a stirred tank or a packed column reactor, and the product quality is difficult to control, and the particles will agglomerate during high-temperature phase transition, producing hard agglomerates, so it is difficult to achieve nanoscale in particle size.
[0004] At present, the traditional microchannel synthesis nanomaterials faces the following problems: (1) The fluid in the microreactor is usually in a laminar flow state and is significantly affected by surface tension, and its mixing and mass transfer rate is relatively slow. (2) The complex internal structure and small feature size of the microreactor make it easy to be blocked by solid particles or viscous substances.
[0005] Therefore, it is necessary to develop a precise preparation device for high-quality nanomaterial powder to ensure good micro-mixing efficiency in the precipitation process and improve the uniformity of powder particle size. UTILITY MODEL CONTENTS
[0006] The utility model discloses to the current high-quality nanomaterial synthesis microchannel internal easy to block, mixing efficiency is low, long flow, product particle size and the problem such as distribution dispersion, propose a kind of device of ultrasonic coupling three-dimensional eddy microchannel synthesis high-quality nanomaterials, the device includes pneumatic impact system, ultrasonic device, microchannel device and solid-liquid separation system, the pneumatic impact system can effectively solve the problem of easy blockage of channel encountered when synthesizing nanomaterials in conventional microchannel;Vortex blade is arranged in the microchannel device, which helps to further accelerate the movement rate of microfluid, so as to increase the contact area between reactants in the impact moment;The ultrasonic device can crush the reactants into smaller droplets, improving the mixing performance between reactants. The device greatly solves the problem of material blockage in the microchannel, promotes the "three transmission and one reaction" of the homogeneous interface, can efficiently synthesize high-quality nanomaterials in short process, has the characteristics of high mixing efficiency, short process, small product particle size and concentrated distribution, etc.
[0007] The utility model discloses a technical scheme that is adopted to solve its technical problems:
[0008] A device for synthesizing high-quality nanometer materials by ultrasonic coupling three-dimensional vortex microchannels, comprising a pneumatic impact system, an ultrasonic device, a microchannel device 5 and a solid-liquid separation system, the microchannel device 5 is arranged in the ultrasonic device, the pneumatic impact system, the microchannel device 5 and the solid-liquid separation system are sequentially communicated, and vortex blades 4 are arranged at equal intervals in the microchannel device 5.
[0009] The pneumatic impact system comprises a tee pipe I 9, a tee pipe II and a tee pipe III, the tee port of the tee pipe I 9 is A port, B port and C port respectively, the tee port of the tee pipe II is A' port, B' port and C' port respectively, the tee port of the tee pipe III is A'' port, B'' port and C'' port respectively, the A port of the tee pipe I 9 is communicated with the inlet of the microchannel device 5, the B port of the tee pipe I 9 is communicated with the A' port of the tee pipe II, the B' port of the tee pipe II is provided with an air compression pump I 1, and the C' port of the tee pipe II is provided with a peristaltic pump I 2; the C port of the tee pipe I 9 is communicated with the A'' port of the tee pipe III, the B'' port of the tee pipe III is provided with an air compression pump II 10, and the C'' port of the tee pipe III is provided with a peristaltic pump II 11.
[0010] The ultrasonic device comprises an ultrasonic reaction tank 3 and an ultrasonic generator 8 fixedly arranged in the ultrasonic reaction tank 3, and the microchannel device 5 is fixedly arranged in the ultrasonic reaction tank 3.
[0011] The microchannel device 5 comprises a plurality of straight pipes and arc-shaped pipes, the straight pipes and the arc-shaped pipes are alternately communicated to form an S-shaped microchannel, vortex blades 4 in an array are arranged at equal intervals in the straight pipes along the flow direction of reactants, the vortex blades 4 are formed into arc-shaped blades by the top wall and / or bottom wall of the straight pipe wall being recessed into a cone towards the central axis, and the vortex blades 4 in the array cooperate with the reactant flow cavity in the straight pipe to form a vortex channel.
[0012] Preferably, along the flow direction of reactants, the length of the array of vortex blades is 50-200 microns, the interval between adjacent arrays of vortex blades is 20-80 microns, and the height of the vortex blades is 20-60% of the height of the cavity in the straight pipe.
[0013] The solid-liquid separation system comprises a funnel 6, a vacuum negative pressure tank and a vacuum pump 7, the funnel 6 is arranged at the top end of the vacuum negative pressure tank, and the top of the vacuum negative pressure tank is communicated with the vacuum pump 7.
[0014] When two different materials flow into the micro-channel device at a certain flow rate through the pneumatic impact system, the high-speed airflow generated by the pneumatic impact system makes the liquid be differentiated into small droplets and accelerated; the two high-speed microfluids collide with each other in the pipeline of the pneumatic impact system and continuously flow out to the micro-channel device; in the micro-channel device, the vortex blades arranged on the inner wall of the micro-channel help to further accelerate the movement rate of the microfluids, so as to increase the contact area between the reactants at the moment of impact. At the same time, the micro-channel device is arranged in the ultrasonic device, so that the material mixing reaction area is located in the ultrasonic wave of the ultrasonic device, at this time the ultrasonic device crushes the reactants into smaller droplets, improves the uniformity of the mixing of the reactants and promotes the reaction; finally, the solution after the reaction passes through the solid-liquid separation system to obtain the nanometer material product.
[0015] The utility model discloses the beneficial effects:
[0016] (1) the utility model discloses device greatly solves the internal material blockage of microchannel, promotes the " three transmission one reaction " of homogeneous phase interface, can short process high -efficient synthesis high -quality nanometer material, has the characteristics such as high mixing efficiency, short process, product particle size is small and is distributed concentratedly etc.
[0017] (2) the utility model discloses pneumatic impact system can greatly improve the mixing mass transfer rate slow of traditional microreactor, easy to be blocked by solid particle or viscous thing etc., high -speed airflow makes liquid be differentiated into small droplets and be accelerated, then in three -dimensional vortex microchannel, the vortex blade that distributes on the inner wall of microchannel helps to further accelerate the movement rate of microfluids, so as to increase the contact area between the reactants at the moment of impact.
[0018] (3) the utility model discloses ultrasonic device through cavitation effect, high temperature and high pressure of the high temperature and high pressure, micro - jet impact produced by mechanics and thermal effect, can control particle size and prevent agglomeration, this process not only influences crystal nucleus formation, and can control crystal nucleus synchronous growth, also can solve the problem of serious agglomeration of powder, particle size distribution and appearance difficult control etc. in the process of preparing nanometer powder of precipitation method;
[0019] (4) the coupling of ultrasonic device and microchannel device can accurately control the sound field and bubble field in the limited space of submillimeter, realize the uniform and efficient acoustic cavitation process, and the introduction of ultrasonic wave can also solve the problems of weak convective mixing and easy blockage of the microreactor. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is the device structure schematic diagram of ultrasonic coupling three -dimensional vortex microchannel synthesis high -quality nanometer material;
[0021] Figure 2 It is the structure schematic diagram of vortex blade being located at the top end or bottom end of microchannel;
[0022] Figure 3 A schematic diagram of the structure where the vortex blades are located at the top and bottom of the microchannel;
[0023] In the diagram, 1-Air compressor pump I, 2-Peristaltic pump I, 3-Ultrasonic reaction tank, 4-Vortex blade, 5-Microchannel device, 6-Function funnel, 7-Vacuum pump, 8-Ultrasonic generator, 9-T-pipe I, 10-Air compressor pump II, 11-Peristaltic pump II. Detailed Implementation
[0024] The present invention will be further described below with reference to specific embodiments.
[0025] Example 1: As Figure 1 As shown, an apparatus for synthesizing high-quality nanomaterials using ultrasonic coupling three-dimensional vortex microchannels includes an aerodynamic impact system, an ultrasonic device, a microchannel device 5, and a solid-liquid separation system. The microchannel device 5 is disposed within the ultrasonic device, and the aerodynamic impact system, the microchannel device 5, and the solid-liquid separation system are sequentially connected. Vortex blades 4 are arranged at equal intervals within the microchannel device 5.
[0026] When two different materials flow into the microchannel device at a certain flow rate through a pneumatic impact system, the high-speed airflow generated by the system breaks the liquid into tiny droplets and accelerates it. The two high-speed microfluids collide with each other within the pneumatic impact system's pipes and continuously flow out into the microchannel device. Within this device, vortex blades arrayed on the inner wall of the microchannel further accelerate the movement of the microfluids, increasing the contact area between reactants at the moment of impact. Simultaneously, the microchannel device is placed within an ultrasonic device, placing the material mixing and reaction zone within the ultrasonic waves. The ultrasonic device then pulverizes the reactants into even smaller droplets, improving the mixing uniformity and promoting the reaction. Finally, the post-reaction solution passes through a solid-liquid separation system to obtain the nanomaterial product.
[0027] Example 2: The apparatus for synthesizing high-quality nanomaterials using ultrasonic coupling three-dimensional eddy current microchannels in this example is basically the same as the apparatus for synthesizing high-quality nanomaterials using ultrasonic coupling three-dimensional eddy current microchannels in Example 1, except that:
[0028] The pneumatic impact system comprises a tee pipe I 9, a tee pipe II and a tee pipe III, the tee ports of the tee pipe I 9 are A port, B port and C port respectively, the tee ports of the tee pipe II are A' port, B' port and C' port respectively, the tee ports of the tee pipe III are A" port, B" port and C" port respectively, the A port of the tee pipe I 9 is communicated with the inlet of the micro-channel device 5, the B port of the tee pipe I 9 is communicated with the A' port of the tee pipe II, the B' port of the tee pipe II is provided with an air compression pump I 1, and the C' port of the tee pipe II is provided with a peristaltic pump I 2; the C port of the tee pipe I 9 is communicated with the A" port of the tee pipe III, the B" port of the tee pipe III is provided with an air compression pump II 10, and the C" port of the tee pipe III is provided with a peristaltic pump II 11;
[0029] Two different materials flow into the micro-channel device at a certain flow rate through the peristaltic pump I 2 and the peristaltic pump II 11 of the pneumatic impact system respectively, and the high-speed airflow generated by the air compression pump I 1 and the air compression pump II 10 of the pneumatic impact system makes the liquid be differentiated into small droplets and accelerated; the two high-speed microfluids collide with each other in the pipeline of the pneumatic impact system, and continuously flow out to the micro-channel device.
[0030] Embodiment 3: The device for synthesizing high-quality nanometer materials by ultrasonic coupling three-dimensional vortex micro-channel in the embodiment is basically the same as the device for synthesizing high-quality nanometer materials by ultrasonic coupling three-dimensional vortex micro-channel in Embodiment 2, except that:
[0031] The ultrasonic device comprises an ultrasonic reaction tank 3 and an ultrasonic generator 8 fixedly arranged in the ultrasonic reaction tank 3, and the micro-channel device 5 is fixedly arranged in the ultrasonic reaction tank 3;
[0032] The ultrasonic device can control the particle size and prevent agglomeration through cavitation effect, high temperature and high pressure generated by mechanical and thermal effects, micro-jet impact and the like; this process not only affects the formation of crystal nucleus, but also controls the synchronous growth of crystal nucleus, and solves the problems of serious agglomeration of powder, difficult control of particle size distribution and morphology and the like in the process of preparing nanometer powder by precipitation method;
[0033] The coupling of the ultrasonic device and the micro-channel device can accurately control the sound field and bubble field in the limited space of sub-millimeter, realize the uniform and efficient acoustic cavitation process, and the introduction of ultrasonic wave can also solve the problems of weak convective mixing and easy blockage of the micro-reactor.
[0034] Embodiment 4: The device for synthesizing high-quality nanometer materials by ultrasonic coupling three-dimensional vortex micro-channel in the embodiment is basically the same as the device for synthesizing high-quality nanometer materials by ultrasonic coupling three-dimensional vortex micro-channel in Embodiment 3, except that:
[0035] For example, Figure 2 and 3As shown, the microchannel device 5 comprises several straight pipes and arc pipes, which are alternately connected to form "S" type microchannels, and vortex vanes 4 are arranged in an array at equal intervals along the direction of reactant flow in the straight pipes, the vortex vanes 4 are formed as arc vanes by the top wall and / or bottom wall of the straight pipe wall being recessed in the form of a cone towards the central axis direction, and the arrayed vortex vanes 4 cooperate with the reactant flow cavity in the straight pipe to form vortex channels;
[0036] The length of the array of vortex vanes is 50-200 μm, the interval between adjacent arrays of vortex vanes is 20-80 μm, and the height of the vortex vanes is 20-60% of the height of the cavity in the straight pipe along the direction of reactant flow.
[0037] The high-speed airflow of the pneumatic impact system causes the liquid to be differentiated into small droplets and accelerated, and then in the three-dimensional vortex microchannel, the vortex vanes arranged in an array on the inner wall of the microchannel help to further accelerate the movement rate of the microfluid, so as to increase the contact area between the reactants at the moment of impact.
[0038] Embodiment 5: The device for synthesizing high-quality nanomaterials by ultrasonic coupling three-dimensional vortex microchannels in the embodiment is basically the same as the device for synthesizing high-quality nanomaterials by ultrasonic coupling three-dimensional vortex microchannels in Embodiment 4, except that:
[0039] The solid-liquid separation system comprises a funnel 6, a vacuum negative pressure tank and a vacuum pump 7, the funnel 6 is arranged at the top end of the vacuum negative pressure tank, and the top of the vacuum negative pressure tank is in communication with the vacuum pump 7.
[0040] The solid-liquid separation system can realize the separation of high-quality nanomaterials in the reaction system.
[0041] The specific embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by those skilled in the art without departing from the purpose of the utility model.
Claims
1. An apparatus for synthesizing high quality nanomaterials by ultrasonic coupling three-dimensional vortex microchannels, characterized in that: The device comprises a pneumatic impact system, an ultrasonic device, a micro-channel device (5) and a solid-liquid separation system, the micro-channel device (5) is arranged in the ultrasonic device, and the pneumatic impact system, the micro-channel device (5) and the solid-liquid separation system are sequentially communicated; vortex blades (4) are arranged at equal intervals in the micro-channel device (5).
2. The apparatus for synthesis of high quality nanomaterials by ultrasonic coupling three-dimensional eddy microchannels according to claim 1, wherein: The pneumatic impact system comprises a tee pipe I (9), a tee pipe II and a tee pipe III, the tee ports of the tee pipe I (9) are A port, B port and C port respectively, the tee ports of the tee pipe II are A' port, B' port and C' port respectively, the tee ports of the tee pipe III are A" port, B" port and C" port respectively, the A port of the tee pipe I (9) is communicated with the inlet of the micro-channel device (5), the B port of the tee pipe I (9) is communicated with the A' port of the tee pipe II, the B' port of the tee pipe II is provided with an air compression pump I (1), and the C' port of the tee pipe II is provided with a peristaltic pump I (2); the C port of the tee pipe I (9) is communicated with the A" port of the tee pipe III, the B" port of the tee pipe III is provided with an air compression pump II (10), and the C" port of the tee pipe III is provided with a peristaltic pump II (11).
3. The apparatus for synthesis of high quality nanomaterials by ultrasonic coupling three-dimensional eddy microchannels according to claim 1, wherein: The ultrasonic device comprises an ultrasonic reaction tank (3) and an ultrasonic generator (8) fixedly arranged in the ultrasonic reaction tank (3), and the micro-channel device (5) is fixedly arranged in the ultrasonic reaction tank (3).
4. The apparatus for synthesis of high quality nanomaterials by ultrasonic coupling three-dimensional eddy microchannels according to claim 3, wherein: The micro-channel device (5) comprises a plurality of straight pipes and arc pipes, the straight pipes and the arc pipes are alternately communicated to form "S" type micro-channels, vortex blades (4) in array distribution are arranged at equal intervals in the straight pipes along the flow direction of reactants, the vortex blades (4) are formed by the top wall and / or the bottom wall of the straight pipe wall being recessed in the form of a cone towards the central axis direction to form arc blades, and the vortex blades (4) in array distribution and the reactant flow cavity in the straight pipe cooperate to form vortex channels.
5. The apparatus for synthesis of high quality nanomaterials by ultrasonic coupling three-dimensional eddy microchannels according to claim 1, wherein: The solid-liquid separation system comprises a funnel (6), a vacuum negative pressure tank and a vacuum pump (7), the funnel (6) is arranged at the top end of the vacuum negative pressure tank, and the top of the vacuum negative pressure tank is communicated with the vacuum pump (7).