CN113058524A - Ultrasonic wave tubular reactor - Google Patents
Ultrasonic wave tubular reactor Download PDFInfo
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- CN113058524A CN113058524A CN202110284394.8A CN202110284394A CN113058524A CN 113058524 A CN113058524 A CN 113058524A CN 202110284394 A CN202110284394 A CN 202110284394A CN 113058524 A CN113058524 A CN 113058524A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/10—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing sonic or ultrasonic vibrations
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Abstract
The invention relates to the technical field of tubular reactors, and discloses an ultrasonic tubular reactor which comprises at least one ultrasonic transducer, a vibrating plate and a fluid pipeline, wherein the ultrasonic transducer is provided with a front radiation surface, and the front radiation surface of the ultrasonic transducer and the fluid pipeline are respectively arranged on two opposite sides of the vibrating plate. The invention provides an ultrasonic tubular reactor, which aims to achieve the purposes of large ultrasonic radiation area, convenience in disassembly and assembly of a fluid pipeline, high ultrasonic transmission efficiency, simple structure and low cost.
Description
Technical Field
The invention relates to the technical field of ultrasonic equipment, in particular to an ultrasonic tubular reactor.
Background
At present, a microtube-based tubular reactor refers to a fluid device having a characteristic size of an internal structure in the scale of several micrometers to several millimeters (such an internal structure is also referred to as a microchannel). Compared with the traditional large-scale chemical equipment, the tubular reactor based on the micro-pipeline has the advantages of controllable process, simplicity in operation, high safety performance, small occupied space and the like, and therefore, the tubular reactor based on the micro-pipeline is more and more widely applied.
In order to enhance the mixing of different liquids in a pipe, common practice is divided into passive mixing and active mixing. The passive mixing is to bend and deform the pipeline or to arrange a mixing structure in the pipeline, the type of the mixing structure is generally a static mixing component or a baffle, and when liquid passes through the bent and deformed pipeline or the mixing structure, the bent and deformed pipeline or the mixing structure can cut fluid or generate local vortex so as to achieve the effect of enhancing fluid mixing. However, passive mixing has two problems: (1) the inner space of the micro pipeline is small, and the micro pipeline is easily blocked by solid particles, so that the risk of blocking the pipeline is further increased by passive mixing; (2) the passive mixing is extremely dependent on the flow rate of the fluid, and the mixing effect between the fluids is good only when the fluids have a large flow rate, and thus, there are problems that the operation elasticity is poor, the operation window is narrow, and the residence time cannot be excessively long.
The active mixing is to enhance the mixing of the fluid in the pipeline by the external field, the mixing effect of the method is determined by the strength of the external field and is independent of the flow velocity of the fluid, therefore, the mixing effect and the residence time of the active mixing can be separately adjusted, and the method has the advantages of large operation interval and good operation elasticity, thereby being suitable for the operation with low flow velocity and high flow velocity. Since ultrasonic waves are mechanical waves, they have the advantages of safety, reliability, low cost and mature technology, and thus, among various active mixers used in a tubular reactor, a tubular mixer based on ultrasonic mixing is most widely used.
It is known that existing tubular mixers based on ultrasonic mixing comprise an ultrasonic transducer and a reactor tube, and the ultrasonic transducer is connected with the reactor tube in an indirect contact manner and a direct contact manner. For indirect connection between the ultrasonic transducer and the reactor pipe, the world patent WO2011023761 discloses a method for introducing ultrasound into the pipe reactor, which directly transmits ultrasonic energy from the ultrasonic transducer to the process fluid in contact therewith through a coupling device and introduces the ultrasonic energy into the reactor through the process fluid, and which can introduce ultrasound only in a local part of the reactor (such as an inlet and an outlet) due to the relatively fast attenuation of the ultrasound in the process fluid; german patent DE10243837a1 discloses a high throughput ultrasonic flow cell reactor in which an ultrasonic probe is connected to a reactor tube through a jacket, and high pressure water is injected between the jacket and the reactor tube, and the high pressure water is not only used to conduct ultrasonic waves into the reactor tube, but also to control the temperature of the reactor tube, but the apparatus has disadvantages in that the ultrasonic waves are lost in the high pressure water, and the ultrasonic waves are reflected in the water and the reactor tube, thereby further reducing the efficiency of energy transmission into the tube.
For the direct contact between the ultrasonic transducer and the reactor pipeline, the Chinese patent with the publication number of CN104923468B discloses a high-power ultrasonic microreactor, which comprises a microreactor and an ultrasonic transducer, wherein the microreactor is directly and rigidly connected with the ultrasonic transducer through a front radiation surface of the ultrasonic transducer, so that the microreactor and the ultrasonic transducer vibrate as a whole, and the wavelength of ultrasonic waves formed by vibration in a direction vertical to the front radiation surface is twice of the distance from the upper surface of the microreactor to the back surface of a back cover plate; therefore, the fluid pipeline of the high-power ultrasonic microreactor is positioned in a reactor plate, the reactor plate is combined with the front radiation surface of the ultrasonic transducer, and the whole high-power ultrasonic microreactor forms a half-wave array in the longitudinal direction to achieve resonance, so that ultrasonic energy is gathered in the fluid pipeline in the reactor plate, but the high-power ultrasonic microreactor has the following problems: (1) the radiation area of the ultrasonic microreactor is limited, the length of a pipeline which can be contacted with the ultrasonic microreactor is limited, and the ultrasonic microreactor is inconvenient to be made into an ultrasonic reactor with larger volume; (2) because the fluid pipeline is arranged in the reactor plate, when the fluid pipeline needs to be maintained or disassembled, the fluid pipeline needs to be disassembled from the reactor plate to obtain the fluid pipeline, so that the problem of difficult disassembly of the fluid pipeline exists; in addition, an installation cavity for placing a fluid pipeline needs to be arranged in the reactor plate, so that the manufacturing difficulty of the reactor plate is increased;
chinese patent publication No. CN202010516802.3 discloses a tubular continuous flow ultrasonic reactor, which includes an ultrasonic transducer, an amplitude transformer, a tool head, and a fluid pipeline, wherein one end of the amplitude transformer is connected to the ultrasonic transducer, the other end of the amplitude transformer is connected to the tool head, the fluid pipeline is wound around a vibration wall of the tool head, and the amplitude transformer is used to transmit ultrasonic waves generated by the ultrasonic transducer to the tool head, so that the tubular continuous flow ultrasonic reactor transmits ultrasonic energy to the vibration wall of the tool head by using the amplitude transformer, thereby increasing the radiation area of the ultrasonic waves, but the tubular continuous flow ultrasonic reactor has the following problems: (1) the size of the radiation area of the ultrasound is limited; (2) the ultrasonic device composed of the ultrasonic transducer, the horn and the tool head has a complex structure and high cost, and the volume of the tubular continuous flow ultrasonic reactor is difficult to further increase.
Disclosure of Invention
The purpose of the invention is: the invention provides an ultrasonic tubular reactor, which aims to achieve the purposes of large ultrasonic radiation area, convenience in disassembly and assembly of a fluid pipeline, high ultrasonic transmission efficiency, simple structure and low cost.
In order to achieve the above object, the present invention provides an ultrasonic tube reactor, which includes an ultrasonic transducer, a vibrating plate and a fluid pipeline, wherein the ultrasonic transducer is provided with at least one, the ultrasonic transducer is provided with a front radiation surface, and the front radiation surface of the ultrasonic transducer and the fluid pipeline are respectively arranged on two opposite sides of the vibrating plate.
In some embodiments of the present application, when the ultrasonic transducer is provided in plurality, the plurality of ultrasonic transducers are uniformly arranged along the side surface of the vibration plate.
In some embodiments of the present application, the length of the fluid conduit is equal to an integer multiple of half the wavelength of the ultrasound waves within or in the fluid conduit.
In some embodiments of the present application, the fluid pipes are provided in a plurality, the plurality of fluid pipes are uniformly arranged along a side surface of the vibration plate, and the adjacent fluid pipes are connected together by a connection pipe.
In some embodiments of the present application, the fluid conduit is detachably connected to the vibration plate.
In some embodiments of the present application, the frequency of the ultrasonic transducer is within 18-1000 KHz.
In some embodiments of the present application, the thickness of the vibrating plate is within 0.5-50 mm.
In some embodiments of the present application, the hydraulic diameter of the inner profile of the fluid conduit is within 0.1-100 mm.
In some embodiments of the present application, the vibration plate has a polygonal structure.
In some embodiments of the present application, the ultrasonic transducer includes a back cover plate, a piezoelectric ceramic stack, and a front cover plate, the back cover plate and the front cover plate are connected through the piezoelectric ceramic stack, and the front cover plate has the front radiation surface disposed on the front cover plate.
In some embodiments of the present application, the shape of the front cover plate is one of cylindrical, conical, exponential, and catenary.
The embodiment of the invention provides an ultrasonic tubular reactor, which has the following beneficial effects compared with the prior art:
(1) according to the embodiment of the invention, the vibrating plate is arranged, and the plurality of ultrasonic transducers can be placed on one side of the vibrating plate, so that the vibrating plate connects the plurality of ultrasonic transducers together, the radiation area of the ultrasonic tubular reactor is increased, and the volume of the ultrasonic tubular reactor is larger, so that ultrasonic waves can be transmitted into more fluid pipelines;
(2) the ultrasonic transducers are connected with the fluid pipeline through the vibration plates, ultrasonic waves generated by the ultrasonic transducers are transmitted into the fluid pipeline through the vibration plates, and the vibration plates attenuate the ultrasonic waves less in the process of transmitting the ultrasonic waves into the fluid pipeline, so that the efficiency of transmitting the ultrasonic waves into the fluid pipeline is high;
(3) compared with the fluid pipeline arranged inside the vibrating plate, the fluid pipeline of the embodiment is arranged on the side face of the vibrating plate, so that a user can install the fluid pipeline on the vibrating plate and directly detach the fluid pipeline from the vibrating plate according to actual requirements, and therefore the connecting difficulty between the fluid pipeline and the vibrating plate is reduced, and the fluid pipeline is convenient to detach and maintain;
(4) the ultrasonic tubular reactor also has the advantages of simple structure and low cost.
Drawings
FIG. 1 is one of the schematic structural views of a tubular reactor according to an embodiment of the present invention.
FIG. 2 is a second schematic view of the structure of a tubular reactor according to an embodiment of the present invention.
In the figure, 1, a super energy heat exchanger; 11. a rear cover plate; 12. a piezoelectric ceramic plate; 13. a front cover plate; 2. a vibrating plate; 3. a fluid conduit; 4. and connecting the pipelines.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 and 2, an embodiment of the present invention provides an ultrasonic tubular reactor, which includes an ultrasonic transducer 1, a vibration plate 2, and a fluid pipe 3, where the ultrasonic transducer 1 is provided with at least one, the ultrasonic transducer 1 is provided with a front radiation surface, and the front radiation surface of the ultrasonic transducer 1 and the fluid pipe 3 are respectively provided on two opposite sides of the vibration plate 2.
Based on the above arrangement, the ultrasonic tubular reactor of the embodiment of the invention has the following advantages:
(1) according to the embodiment of the invention, the vibrating plate 2 is arranged, and the plurality of ultrasonic transducers 1 can be placed on one side of the vibrating plate 2, so that the vibrating plate 2 connects the plurality of ultrasonic transducers 1 together, thereby not only increasing the radiation area of the ultrasonic tubular reactor, but also enabling the volume of the ultrasonic tubular reactor to be larger so as to transmit ultrasonic waves into more fluid pipelines 3;
(2) the ultrasonic transducers 1 are connected with the fluid pipeline 3 through the vibration plate 2, ultrasonic waves generated by the ultrasonic transducers 1 are transmitted into the fluid pipeline 3 through the vibration plate 2, and the vibration plate 2 has small attenuation on the ultrasonic waves in the process of transmitting the ultrasonic waves into the fluid pipeline 3, so that the efficiency of transmitting the ultrasonic waves into the fluid pipeline 3 is high;
(3) compared with the fluid pipeline 3 arranged inside the vibrating plate 2, the fluid pipeline 3 of the present embodiment is arranged on the side of the vibrating plate 2, so that a user can mount the fluid pipeline 3 on the vibrating plate 2 and directly detach the fluid pipeline 3 from the vibrating plate 2 according to actual requirements, thereby reducing the difficulty of connection between the fluid pipeline 3 and the vibrating plate 2 and facilitating the detachment and maintenance of the fluid pipeline 3;
(4) the ultrasonic tubular reactor also has the advantages of simple structure and low cost.
In some embodiments, optionally, as shown in fig. 1 and 2, when the ultrasonic transducer 1 is provided in plurality, the plurality of ultrasonic transducers 1 are uniformly arranged along the side of the vibration plate 2, whereby the ultrasonic waves generated by the plurality of ultrasonic transducers 1 can be uniformly transmitted to the vibration plate 2, thereby facilitating uniform distribution of the ultrasonic waves on the vibration plate 2; in addition, the size of the vibrating plate 2 and the number of the ultrasonic transducers 1 are not limited in this embodiment, and a user can set the size of the vibrating plate 2 and the number of the ultrasonic transducers 1 according to actual requirements, so that the ultrasonic transducer 1 can be made into a large-scale device while the ultrasonic transducer 1 has the advantage of simple connection between the vibrating plate 2 and the ultrasonic transducers 1 and the fluid pipe 3.
Of course, when the ultrasonic transducers 1 are arranged as one, the ultrasonic waves generated by the single ultrasonic transducer 1 can also be transmitted into the fluid pipeline 3 through the vibration plate 2, and the number of the ultrasonic transducers 1 can be set by a user according to actual needs.
In some embodiments, optionally, as shown in fig. 1 and 2, the length of the fluid conduit 3 is equal to an integral multiple of half of the wavelength of the ultrasonic waves in the fluid conduit 3 or the fluid, so that the ultrasonic waves are reflected back and forth in the fluid conduit 3 and standing wave resonance occurs in the fluid conduit 3, so that the ultrasonic waves are further converged in the fluid conduit 3, and the utilization rate of the ultrasonic energy is improved.
In some embodiments, optionally, as shown in fig. 1 and 2, the fluid conduit 3 may be provided in one or more strips, and when the fluid conduit 3 is provided in one strip, the user mounts the whole fluid conduit 3 on the side of the vibrating plate 2, so as to improve the mounting efficiency of the fluid conduit 3, but when the fluid conduit 3 is damaged, the whole fluid conduit 3 needs to be replaced, but this way makes the replacement cost of the fluid conduit 3 high;
when fluid pipeline 3 sets up to many, a plurality of fluid pipeline 3 are along the even setting of the side of vibration board 2, connect through connecting tube 4 between the adjacent fluid pipeline 3, and consequently, when damage appears in one of them fluid pipeline 3, only need change the fluid pipeline 3 that damages can to reduce this fluid pipeline 3's replacement cost.
In some embodiments, optionally, as shown in fig. 1 and 2, the outer profile of the fluid conduit 3 is one of circular, elliptical, square, rectangular, and other irregular shapes in cross-section; the cross-section of the inner contour of the fluid conduit 3 is one of circular, oval, square, rectangular and other irregular shapes, and preferably, in order to facilitate the machining of the fluid conduit 3, the cross-section of the outer contour of the fluid conduit 3 is square and the cross-section of the inner contour of the fluid conduit 3 is circular.
In some embodiments, optionally, as shown in fig. 1 and 2, the fluid conduit 3 is one of a metal pipe, a glass pipe, a ceramic pipe and a polymer plastic pipe, and preferably, in order to prolong the service life of the fluid conduit 3 or facilitate understanding of the reaction condition of the fluid in the fluid conduit 3, the fluid conduit 3 is preferably a metal pipe or a glass pipe;
the material and the size of the connecting pipeline 4 can be the same as or different from those of the fluid pipeline 3, when the material of the connecting pipeline 4 is different from that of the fluid pipeline 3, the connecting pipeline 4 is preferably a plastic pipe or a silicone tube, and the fluid pipeline 3 is preferably a glass pipe or a metal pipe; further, the connecting pipe 4 is preferably an arc-shaped pipe.
In some embodiments, optionally, as shown in fig. 1 and 2, the vibration plate 2 and the front radiation surface of the ultrasonic transducer 1 may be connected by welding, a fastener or epoxy, and preferably, the vibration plate 2 and the front radiation surface of the ultrasonic transducer 1 are connected by a fastener or epoxy, so that when the vibration plate 2 or the ultrasonic transducer 1 is damaged, a user may remove and replace the vibration plate 2 or the ultrasonic transducer 1;
similarly, the vibration plate 2 is detachably connected to the fluid pipe 3, and preferably, the vibration plate 2 is bonded to the fluid pipe 3 by a rigid epoxy resin, so that the fluid pipe 3 can be removed and replaced by a user when the fluid pipe 3 is damaged.
In some embodiments, optionally, as shown in fig. 1 and 2, the ultrasonic transducer 1 includes a back cover plate 11, a piezoelectric ceramic stack 12, and a front cover plate 13, the back cover plate 11 and the front cover plate 13 are connected by the piezoelectric ceramic stack 12, and the front cover plate 13 is provided with a front radiation surface, in other words, ultrasonic energy generated by the piezoelectric ceramic stack 12 is transmitted to the vibration plate 2 through the front cover plate 13, so as to complete the transmission of the ultrasonic energy; in addition, the front cover plate 13 of the ultrasonic transducer 1 is generally made of light metal, the rear cover plate 11 is generally made of heavy metal, that is, the acoustic impedance ratio of the rear cover plate 11 is larger than that of the front cover plate 13, and after ultrasonic energy is radiated from the front radiation surface of the front cover plate 13, the vibration amplitude of the vibration plate 2 is maximum, so that the vibration plate 2 and the fluid pipe 3 both have strong ultrasonic energy.
In some embodiments, optionally, as shown in fig. 1 and 2, the shape of the front cover plate 13 may be one of a cylinder, a cone, an exponential, and a catenary, so that the front radiating surface of the front cover plate 13 may better transmit ultrasonic energy to the vibrating plate 2 and the fluid conduit 3, and preferably, the shape of the front cover plate 13 is a cone.
In some embodiments, the vibration plate 2 may alternatively be a polyhedral structure, and may specifically be one of a trihedral structure, a tetrahedral structure, a pentahedral structure, and a hexahedral structure, as shown in fig. 1 and 2.
In some embodiments, optionally, as shown in fig. 1 and 2, the frequency of the ultrasonic transducer 1 is within 18-1000 KHz, so as to ensure that the ultrasonic energy generated by the ultrasonic transducer 1 satisfies the mixing of the liquid, and preferably, the frequency of the ultrasonic transducer 1 is within 18-500 KHz.
In some embodiments, optionally, as shown in FIGS. 1 and 2, testing has found that ultrasonic energy is attenuated to a minimum extent during transmission into a fluid conduit when the thickness of the vibrating plate 2 is within 0.5-50 mm, and preferably, the thickness of the vibrating plate 2 is within 1-20 mm.
In some embodiments, optionally, as shown in fig. 1 and 2, to facilitate mixing of the liquid within the flow conduit, the hydraulic diameter of the fluid conduit 3 is within 0.1-100 mm, preferably the hydraulic diameter of the fluid conduit 3 is within 0.5-5 mm.
As shown in fig. 1 and 2, the operation of the ultrasonic tubular reactor is that after ultrasonic waves generated by a plurality of ultrasonic transducers 1 pass through a vibrating plate 2, the ultrasonic waves enter a fluid pipe 3 and are reflected back and forth in the fluid pipe 3 to generate a radial resonant standing wave, so that the fluids can be mixed in the fluid pipe 3.
In summary, the ultrasonic tubular reactor of the embodiment of the present invention has the following advantages:
(1) according to the embodiment of the invention, the vibrating plate 2 is arranged, and the plurality of ultrasonic transducers 1 can be placed on one side of the vibrating plate 2, so that the vibrating plate 2 connects the plurality of ultrasonic transducers 1 together, thereby not only increasing the radiation area of the ultrasonic tubular reactor, but also enabling the volume of the ultrasonic tubular reactor to be larger so as to transmit ultrasonic waves into more fluid pipelines 3;
(2) the ultrasonic transducers 1 are connected with the fluid pipeline 3 through the vibration plate 2, ultrasonic waves generated by the ultrasonic transducers 1 are transmitted into the fluid pipeline 3 through the vibration plate 2, and the vibration plate 2 has small attenuation on the ultrasonic waves in the process of transmitting the ultrasonic waves into the fluid pipeline 3, so that the efficiency of transmitting the ultrasonic waves into the fluid pipeline 3 is high;
(3) compared with the fluid pipeline 3 arranged inside the vibrating plate 2, the fluid pipeline 3 of the present embodiment is arranged on the side of the vibrating plate 2, so that a user can mount the fluid pipeline 3 on the vibrating plate 2 and directly detach the fluid pipeline 3 from the vibrating plate 2 according to actual requirements, thereby reducing the difficulty of connection between the fluid pipeline 3 and the vibrating plate 2 and facilitating the detachment and maintenance of the fluid pipeline 3;
(4) the ultrasonic tubular reactor also has the advantages of simple structure and low cost.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. The ultrasonic tube reactor is characterized by comprising at least one ultrasonic transducer, a vibrating plate and a fluid pipeline, wherein the ultrasonic transducer is provided with a front radiation surface, and the front radiation surface of the ultrasonic transducer and the fluid pipeline are respectively arranged on two opposite sides of the vibrating plate.
2. The ultrasonic tube reactor according to claim 1, wherein when the ultrasonic transducer is provided in plurality, the plurality of ultrasonic transducers are uniformly arranged along a side surface of the vibration plate.
3. The ultrasonic tube reactor according to claim 1, wherein the fluid tubes are provided in a plurality, the plurality of fluid tubes are uniformly provided along a side surface of the vibration plate, and adjacent fluid tubes are connected to each other by a connection tube.
4. An ultrasonic tubular reactor according to claim 1 wherein the length of the fluid conduit is equal to an integer multiple of half the wavelength of the ultrasonic waves within the fluid conduit or in the fluid.
5. The ultrasonic tube reactor of claim 1, wherein the fluid conduit is removably coupled to the vibrating plate.
6. The ultrasonic tubular reactor of claim 1 wherein the ultrasonic transducer has a frequency within 18-1000 KHz.
7. An ultrasonic tubular reactor according to claim 1 wherein the thickness of the vibrating plate is within 0.5 to 50 mm.
8. The ultrasonic tubular reactor of claim 1 wherein the hydraulic diameter of the inner profile of the fluid conduit is within 0.1-100 mm.
9. The ultrasonic tube reactor of claim 1, wherein the vibrating plate has a polygonal configuration.
10. The ultrasonic tubular reactor of claim 1, wherein the ultrasonic transducer comprises a back cover plate, a piezo ceramic stack and a front cover plate, the back cover plate and the front cover plate are connected through the piezo ceramic stack, and the front radiating surface is disposed on the front cover plate.
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| CN202110284394.8A CN113058524A (en) | 2021-03-16 | 2021-03-16 | Ultrasonic wave tubular reactor |
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| CN202110284394.8A CN113058524A (en) | 2021-03-16 | 2021-03-16 | Ultrasonic wave tubular reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733415A (en) * | 2022-03-01 | 2022-07-12 | 中国科学院大连化学物理研究所 | Ultrasonic micro mixer with millisecond mixing performance |
| WO2023020180A1 (en) * | 2021-08-19 | 2023-02-23 | 化学与精细化工广东省实验室 | Large-volume ultrasonic tubular reactor |
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