A device for forming droplets at an annular ultrasonic fusion interface
By using a ring-shaped ultrasonic fusion interface droplet forming device, the ultrasonic cavitation effect is used to reduce the interfacial tension between oil and ammonia, which solves the problem of stable penetration of sol droplets, improves the sphericity and mechanical strength of alumina balls, and avoids the pollution and adhesion problems of chemical additives.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANGZHOU ZHONGTIANLI NEW MATERIAL
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-30
AI Technical Summary
In the preparation of alumina sphere catalyst supports, existing technologies have difficulty overcoming the interfacial tension between oil and ammonia in sol droplets, leading to adhesion and a decrease in solidification rate. Furthermore, chemical additives present issues of contamination and compatibility.
A ring-shaped ultrasonic fusion interface droplet forming device is used. Ultrasonic waves generated by a piezoelectric transducer induce cavitation at the oil-ammonia interface, reducing interfacial tension in a non-contact manner and achieving stable penetration of sol droplets.
It achieves efficient and stable penetration of sol droplets, avoids foam adhesion and oil cap residue, and improves the sphericity and mechanical strength of alumina spheres.
Smart Images
Figure CN224422765U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of catalyst production equipment, and specifically proposes a device for forming droplets at an annular ultrasonic fusion interface. Background Technology
[0002] In industrial catalysis, when alumina spheres are used as catalyst supports, their sphericity and mechanical strength directly affect catalytic performance. The oil-ammonia column forming method is an important method for preparing spherical alumina, and its process includes:
[0003] Aluminum sol is dropped into an oil phase (such as kerosene), and the surface tension causes it to shrink into spheres.
[0004] The sol-gel balls pass through the oil-ammonia water interface and enter the ammonia water layer to solidify.
[0005] Alumina balls are obtained by drying and calcining.
[0006] The particles prepared by this method have advantages such as high sphericity, high strength, and low wear rate, and are widely used in fixed bed / moving bed reactors.
[0007] A key challenge in oil-ammonia column formation is how the sol liquid overcomes surface tension to successfully penetrate the oil-ammonia interface. Current techniques commonly employ the following approach: adding surfactants to reduce the oil-ammonia interfacial tension and promote droplet passage. However, this approach has significant drawbacks: for example, surfactants easily form foam-like droplets at the interface, leading to droplet adhesion, loss of sphericity, and the potential for the sol spheres to carry "oil caps," resulting in a decreased solidification rate and increased breakage rate. Although researchers have attempted to optimize the type of surfactant or the composition of the oil phase, they have consistently failed to simultaneously address the issues of chemical additive contamination and compatibility with multi-component systems.
[0008] Therefore, there is an urgent need to develop a non-chemically-interventional interfacial tension reduction technology to achieve efficient and stable penetration of sol droplets. Utility Model Content
[0009] In view of this, this invention proposes a device for forming annular ultrasonic fusion interface droplets. It overcomes the inherent defects of chemical additives by non-contactly reducing interfacial tension through cavitation effects.
[0010] The technical solution of this utility model is implemented as follows: This utility model provides a device for forming droplets at an annular ultrasonic fusion interface, suitable for oil-ammonia columns, including: a support ring, piezoelectric transducers, a power interface, hooks, and a control panel. The support ring is sleeved on the outside of the oil-ammonia column, and a hook is connected to the top of the support ring, which is hung on the edge of the opening at the top of the oil-ammonia column. Multiple piezoelectric transducers are arranged in a ring array on the inside of the support ring, and the emitting surface of the piezoelectric transducer is coupled to the outer wall of the oil-ammonia column. The power interface and the control panel are fixedly arranged on the outside of the support ring. The control panel is electrically connected to the piezoelectric transducer and the power interface.
[0011] In the above embodiments, at least two hooks are provided, preferably three, with multiple hooks arranged circumferentially on the top of the bearing ring. The hooks are hung on the edge of the opening at the top of the oil-ammonia column to fix the bearing ring. The power interface is connected to an external power supply line and transmits electrical energy to the control panel and the piezoelectric transducer. The piezoelectric transducer converts electrical energy into sound waves, which act on the interface between the oil phase and the ammonia phase of the oil-ammonia column.
[0012] In some embodiments, a sound-conducting medium is also included, which is filled between the emitting surface of the piezoelectric transducer and the outer wall of the oil-ammonia column.
[0013] Because the coupling effect is poor when the emitting surface of the piezoelectric transducer is in rigid contact with the outer wall of the oil-ammonia column, the sound transmission efficiency may be low, affecting the energy transfer efficiency. Therefore, in order to improve this coupling effect, a sound-conducting medium is filled between the emitting surface of the piezoelectric transducer and the outer wall of the oil-ammonia column. The sound-conducting medium is in the form of a film.
[0014] In some embodiments, the sound-conducting medium is glycerol or deionized water.
[0015] In some embodiments, an adjusting nut is also included. Positioning holes are provided on opposite sides of the bearing ring. The bottom side of the hook is threaded. The bottom of the hook passes through the positioning hole and is threadedly connected to the adjusting nut. The adjusting nut and the bottom surface of the positioning hole abut against each other.
[0016] In some embodiments, the bearing ring is made of stainless steel.
[0017] In the above embodiments, by adjusting the position of the nut at the bottom of the hook, the relative position of the bearing ring can be changed, thereby allowing the ultrasonic waves to be more concentrated at the interface between the oil phase and the ammonia phase.
[0018] The power interface connects to an external power supply line and transmits electrical energy to the control panel. The power regulation module of the control panel transmits electrical energy to the piezoelectric transducer, which converts the electrical energy into sound waves that act on the oil-ammonia column.
[0019] In some implementations, the control panel surface is provided with a power adjustment knob, a time adjustment knob, a power display screen, an ultrasonic time display screen, and a switch.
[0020] In some implementations, the power and time control circuits in the control panel described above may employ existing technology.
[0021] Explanation of the principle: An imbalance of intermolecular forces exists at the interface between the oil phase and ammonia water. This is because oil molecules and ammonia water molecules repel each other, forming an energy barrier. Sol droplets need to overcome this energy barrier to penetrate the interface. Traditional processes add surfactants to lower this energy barrier. In this application, ultrasound is applied to the oil-ammonia interface. The cavitation effect lowers the interfacial energy barrier below the thermal energy level, allowing the sol droplets to spontaneously penetrate the interface under Brownian motion.
[0022] The present invention has the following advantages over the prior art:
[0023] This invention provides a production equipment for forming droplets of alumina carrier and catalyst. By setting an annular ultrasonic array structure on the outside of the oil-ammonia column, a cavitation effect is induced at the oil-ammonia interface, which physically breaks the surface tension at the oil-ammonia interface, enabling instantaneous penetration of the sol droplets. This solution completely replaces chemical surfactants and avoids the problems of foam adhesion and oil cap residue. Attached Figure Description
[0024] 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.
[0025] Figure 1 This is an isometric view of the device for forming droplets at the annular ultrasonic fusion interface according to this utility model;
[0026] Figure 2 for Figure 1 Exploded view;
[0027] Figure 3 This is a top view of the device for forming droplets at the annular ultrasonic fusion interface according to this invention.
[0028] In the diagram: 1-oil ammonia column, 2-bearing ring, 3-piezoelectric transducer, 4-power interface, 5-hook, 6-sound guiding medium, 7-adjusting nut, 8-control panel, 21-positioning hole, 51-thread. Detailed Implementation
[0029] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0031] It should be understood that the terms "length", "width", "upper", "lower", "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. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this utility model pertain. If any definition stated in this section is contrary to or otherwise inconsistent with a definition stated in a patent, patent application, published patent application, or other publication incorporated herein by reference, the definitions listed here shall prevail over those incorporated herein by reference.
[0034] Unless otherwise specified, the methods used in the following embodiments are conventional methods. Unless otherwise specified, the materials, reagents, and instruments used are conventional materials, reagents, and instruments in the art, and can be obtained commercially by those skilled in the art.
[0035] like Figure 1 As shown, combined with Figure 2-3This utility model discloses a device for forming droplets at an annular ultrasonic fusion interface, used for forming droplets from an oil-ammonia column 1. It includes: a support ring 2, piezoelectric transducers 3, a power interface 4, and hooks 5. The support ring 2 is sleeved on the outside of the oil-ammonia column 1, and hooks 5 are connected to the top of the support ring 2, with the hooks 5 hanging on the edge of the top opening of the oil-ammonia column 1. Multiple piezoelectric transducers 3 are arranged in a ring array inside the support ring 2, with the emitting surfaces of the piezoelectric transducers 3 coupled to the outer wall of the oil-ammonia column 1. The power interface 4 is fixedly located on the outside of the support ring 2. The device also includes a control panel 8, which is fixedly located on the outside of the support ring 2 and electrically connected to the piezoelectric transducers 3 and the power interface 4.
[0036] In some embodiments, a sound-conducting medium 6 is also included, which is filled between the emitting surface of the piezoelectric transducer 3 and the outer wall of the oil-ammonia column 1.
[0037] In the above embodiments, there is a very small gap between the emitting surface of the piezoelectric transducer 3 and the outer wall of the oil-ammonia column 1, and the sound-conducting medium 6 can be stably maintained between the emitting surface of the piezoelectric transducer 3 and the outer wall of the oil-ammonia column 1.
[0038] In some embodiments, a groove is provided at the emitting surface of the piezoelectric transducer 3. When the emitting surface of the piezoelectric transducer 3 is in contact with the outer wall of the oil-ammonia column 1, the groove forms a sealed cavity. To achieve a better sealing effect, an elastic sealing strip is provided around the groove to better fit the outer wall surface of the oil-ammonia column 1. To facilitate the introduction of the sound-conducting medium 6 after bonding, a through hole can be opened on the top sidewall of the groove for introducing the sound-conducting medium 6 into the groove.
[0039] In some embodiments, the sound-conducting medium 6 is glycerol or deionized water.
[0040] In some embodiments, the device further includes an adjusting nut 7. The bearing ring 2 has positioning holes 21 on opposite sides. The bottom side of the hook 5 is provided with a thread 51. The bottom of the hook 5 passes through the positioning hole 21 and is threadedly connected to the adjusting nut 7. The adjusting nut 7 and the bottom surface of the positioning hole 21 abut against each other.
[0041] In some embodiments, the bearing ring 2 is made of stainless steel.
[0042] In some embodiments, the surface of the control panel 8 is provided with a power adjustment knob, a time adjustment knob, a power display screen, an ultrasonic time display screen, and a switch.
[0043] The power adjustment knob has an adjustment range of 0-600W, and the time adjustment knob has an adjustment range of 0-99min.
[0044] In some embodiments, the power interface 4 is a three-prong plug that can be used with a power cord.
[0045] In some embodiments, the bearing ring 2 is an open-ring structure that can accommodate oil-ammonia columns 1 within a certain diameter range.
[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A device for forming droplets at an annular ultrasonic fusion interface, suitable for oil-ammonia columns (1), characterized in that... The device includes: a support ring (2), a piezoelectric transducer (3), a power interface (4), a hook (5), and a control panel (8). The support ring (2) is sleeved on the outside of the oil-ammonia column (1). The top of the support ring (2) is connected to a hook (5), and the hook (5) is hung on the edge of the top opening of the oil-ammonia column (1). Multiple piezoelectric transducers (3) are arranged in a ring array on the inside of the support ring (2). The emitting surface of the piezoelectric transducer (3) is coupled to the outer wall of the oil-ammonia column (1). The power interface (4) is fixedly arranged on the outside of the support ring (2). The control panel (8) is fixedly arranged on the outside of the support ring (2). The control panel (8) is electrically connected to the piezoelectric transducer (3) and the control panel (8) is electrically connected to the power interface (4).
2. The device for forming annular ultrasonic fusion interface droplets as described in claim 1, characterized in that... It also includes a sound-conducting medium (6), which is filled between the emitting surface of the piezoelectric transducer (3) and the outer wall of the oil-ammonia column (1).
3. The device for forming annular ultrasonic fusion interface droplets as described in claim 2, characterized in that... The sound-conducting medium (6) is glycerol or deionized water.
4. The device for forming annular ultrasonic fusion interface droplets as described in claim 1, characterized in that... It also includes an adjusting nut (7), and the bearing ring (2) has positioning holes (21) on both sides opposite to each other. The bottom side of the hook (5) is provided with a thread (51). The bottom of the hook (5) passes through the positioning hole (21) and is threadedly connected to the adjusting nut (7). The bottom surface of the adjusting nut (7) and the positioning hole (21) abut against each other.
5. The device for forming annular ultrasonic fusion interface droplets as described in claim 1, characterized in that... The bearing ring (2) is made of stainless steel.