A kind of nano calcium carbonate powder rapid drying equipment

Abstract

The present invention belongs to the technical field of nano-calcium carbonate production equipment, and discloses a nano-calcium carbonate powder rapid drying equipment, including: a discharge channel for guiding the dried nano-calcium carbonate powder; an agglomerate deagglomeration mechanism, which is arranged below the discharge port of the discharge channel and is used to deagglomerate the nano-calcium carbonate powder agglomerates in the falling process; the agglomerate deagglomeration mechanism includes: a powder receiving platform with a guide slope, an ultrasonic generator and at least one ultrasonic transducer whose output end is closely fitted to the powder receiving platform are arranged in the powder receiving platform. The present invention destroys the adsorption force between particles inside the agglomerate and deagglomerates through the penetration and vibration characteristics of ultrasonic waves, and the impact of powder particles can be buffered by the elastic deformation of the elastic layer, so that the powder particles are not easy to break during the deagglomeration process. On the other hand, the elastic layer conducts ultrasonic waves to generate continuous and regular elastic vibrations, which further enhances the deagglomeration effect on the agglomerates.

Description

Technical Field

[0001] The invention belongs to the technical field of nano calcium carbonate production equipment, in particular to a nano calcium carbonate powder rapid drying device. Background Art

[0002] In the production process of nano calcium carbonate, drying is a crucial step, and its purpose is to remove moisture from the powder to meet the requirements of subsequent processing and storage. Although traditional drying equipment can evaporate moisture and achieve the purpose of drying, when the drying process is pushed to the subsequent key nodes, problems gradually emerge.

[0003] When the dried nano-calcium carbonate powder slides down from the discharge port and enters the screen screening stage, the external environmental conditions change. Nano-particles have a high specific surface area and strong surface energy, and their mutual adsorption is no longer controlled by the inhibitory factors in the drying process, and is significantly enhanced, causing a large amount of powder to aggregate into agglomerates during this transition stage. The emergence of these agglomerates disrupts the continuity of production, resulting in poor material flow, and greatly interferes with the accuracy of screen screening, making it difficult for the product to reach the ideal particle size uniformity standard, seriously affecting the material flow efficiency and screening accuracy.

[0004] Therefore, a nano calcium carbonate powder rapid drying device is proposed to solve the above problems. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a nano calcium carbonate powder rapid drying device.

[0006] To achieve the above object, the present invention provides the following technical solution: a nano calcium carbonate powder rapid drying device, comprising: A discharge channel is used to guide the dried nano calcium carbonate powder; An agglomerate deagglomeration mechanism is disposed below the discharge port of the discharge channel and is used to deagglomerate the nano-calcium carbonate powder agglomerates during the falling process; A vibration screening element, located below the agglomerate deagglomeration mechanism, for screening the nano calcium carbonate powder after the agglomerate treatment; A discharge port, used to guide the screened nano calcium carbonate powder; The aggregate deagglomeration mechanism comprises: A powder receiving platform having a guide slope, wherein an ultrasonic generator and at least one ultrasonic transducer having an output end closely attached to the powder receiving platform are arranged in the powder receiving platform; As the powder falls onto the powder receiving platform, the nano calcium carbonate powder agglomerates are broken by ultrasonic vibration and move along the guide slope.

[0007] In the above technical solution, preferably, the powder receiving platform includes a cone and a containing tube which are fixedly connected and distributed up and down, and a containing cavity for assembling an ultrasonic generator and an ultrasonic transducer is provided in the containing tube, and the output end of the ultrasonic transducer fits tightly with the cone, and the surface of the cone is covered with an elastic layer which conducts and elastically deforms with ultrasonic waves.

[0008] In the above technical solution, preferably, the agglomerate deagglomeration mechanism further comprises: A connecting tube, one end of which is connected to the powder receiving platform; The charge neutralization depolymerization ring ejects ion wind to contact the falling nano calcium carbonate powder; The ions carried in the ion wind neutralize the static charge on the powder surface in equal amounts, eliminating the agglomeration adsorption caused by the electrostatic adsorption of the powder; The powerful air spray ring sprays impact wind to contact the falling nano calcium carbonate powder.

[0009] In the above technical solution, preferably, it also includes a cover shell, in which the area corresponding to the ion wind ejected by the charge neutralization and depolymerization ring and the area corresponding to the impact wind ejected by the strong air spray ring are roughened and coated with a self-cleaning coating.

[0010] In the above technical solution, preferably, the charge neutralization and depolymerization ring and the strong air spray ring are vertically arranged on the connecting tube; Moreover, the outer diameters of the connecting tube, the charge neutralization and depolymerization ring and the high-force air spray ring are all smaller than the diameter of the powder receiving platform.

[0011] In the above technical solution, preferably, the charge neutralization depolymerization ring comprises: A first deaggregation ring and a second deaggregation ring are respectively arranged on both sides of the strong air spray ring, and the ion wind trajectories ejected by the first deaggregation ring and the second deaggregation ring are respectively arranged to be inclined downward and upward with respect to the central axis of the connecting tube; The impact wind trajectory sprayed by the high-force air spray ring is arranged perpendicularly to the central axis of the connecting tube.

[0012] In the above technical solution, preferably, the connecting tube is vertically provided with a first annular wind chamber, a third annular wind chamber and a second annular wind chamber in which the first depolymerization ring, the strong air spray ring and the second depolymerization ring are respectively installed, and ion wind flows in the first annular wind chamber and the second annular wind chamber, and impact wind flows in the third annular wind chamber; The connecting tube is also provided with a wiring hole connected to the powder receiving platform, and the inner circle diameters of the first annular air cavity, the third annular air cavity and the second annular air cavity are all larger than the maximum radial distance between the outermost circumference of the wiring hole and the central axis of the connecting tube.

[0013] In the above technical solution, preferably, it also includes a first ion air duct, an impact air duct and a second ion air duct respectively connected to the first annular air cavity, the third annular air cavity and the second annular air cavity; The first ion air duct, the impact air duct and the second ion air duct are radially arranged from the inside to the outside with the central axis of the connecting tube as the axis, and the inner circle diameter of the second annular air cavity is larger than the maximum radial distance between the outermost circumference of the impact air duct and the central axis of the connecting tube.

[0014] In the above technical solution, preferably, the first ion wind pipe includes a first main pipe and a first shunt pipe, and the first shunt pipe has at least two ends, one end is connected to the first main pipe, and the other end is connected to the first annular wind cavity; The second ion wind pipe comprises a second main pipe and a second shunt pipe, the second shunt pipe has at least two ends, one end is connected to the second main pipe, and the other end is connected to the second annular wind cavity; The impact air duct includes a third main pipe and a third diverter pipe. The third diverter pipe has at least two ends, one end is connected to the third main pipe, and the other end is connected to the third annular air cavity.

[0015] In the above technical solution, preferably, it also includes a distribution chamber provided in the connection cylinder; The first main pipe is coaxially arranged with the connecting tube, and the second and third shunt pipes are distributed around the outside of the first main pipe and arranged in layers up and down; The first main pipe, the second main pipe, the third main pipe, the second flow-dividing pipe and the third flow-dividing pipe are all located in the distribution chamber.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention efficiently converts electrical energy into high-frequency mechanical vibrations through an ultrasonic transducer and transmits it to the entire powder receiving platform, and the elastic layer on its surface undergoes elastic deformation. When the dried nano calcium carbonate powder falls to the powder receiving platform through a discharge channel, the adsorption force between particles inside the agglomerate is destroyed and deagglomerated through the penetration and vibration characteristics of the ultrasonic wave, and the impact of the powder particles can be buffered by the elastic deformation of the elastic layer, so that the powder particles are not easily broken during the deagglomeration process. On the other hand, the elastic layer conducts ultrasonic waves to generate continuous and regular elastic vibrations, which further enhances the deagglomeration effect on the agglomerate.

[0017] The present invention uses a charge neutralization deagglomeration ring and a strong air spray ring to cooperate with each other to deagglomerate the nano calcium carbonate powder agglomerates. Specifically, the ion wind effectively eliminates the agglomeration adsorption formed by the electrostatic adsorption of the powder, so that the powder particles originally aggregated due to the electrostatic action are separated from each other. Then, the impact force of the impact wind directly acts on the powder agglomerates, and the roughened cover is used to assist the impact wind and the ion wind to achieve the effect of destroying the structure of the agglomerates and breaking up the aggregated powder particles, thereby ensuring that the nano calcium carbonate powder enters the subsequent process in an ideal dispersed state and improving the processing quality. Among them, the charge neutralization and deagglomeration ring sprays ion winds that cross each other in the downward and upward directions, ensuring that the powders at different height levels in the connection tube can be effectively processed, and interweaving with the vertical impact wind that directly impacts the powder agglomerates, acting on the powder agglomerates at multiple angles, continuously disturbing, breaking the electrostatic adsorption, and impacting the agglomerate core, so that the nano calcium carbonate powder can get rid of the agglomeration constraints and smoothly enter the subsequent process in a highly dispersed and high-quality state; The present invention designs the vertically layered first annular wind cavity, the third annular wind cavity, the second annular wind cavity and the corresponding uniquely designed first ion wind duct, the impact wind duct and the second ion wind duct structure in the connecting tube, so that the independent wind path circulation of the first deagglomeration ring, the strong air spray ring and the second deagglomeration ring can be realized, and the mutual interference of the airflow between different deagglomeration links is isolated. The operator can individually adjust the air volume and wind speed of each wind path according to the real-time agglomeration status of the nano calcium carbonate powder, so as to achieve the effect of finely adjusting the deagglomeration intensity and efficient deagglomeration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the powder receiving platform of the present invention; Figure 2 It is a front cross-sectional view of the discharge channel, the agglomerate deagglomeration mechanism, and the vibration screening element of the present invention; Figure 3 It is a three-dimensional cross-sectional view of the agglomerate deagglomeration mechanism of the present invention; Figure 4 An exploded view of the agglomerate deagglomeration mechanism of the present invention; Figure 5 It is a cross-sectional view of the connecting sleeve of the present invention; Figure 6 This is a diagram showing the air paths of the first depolymerization ring and the second depolymerization ring high-force air spray ring of the present invention; Figure 7 It is a three-dimensional structural diagram of the first ion air duct, the impact air duct, and the second ion air duct of the present invention.

[0019] In the figure: 1. discharge channel; 2. agglomerate deagglomeration mechanism; 21. powder receiving platform; 211. cone; 212. accommodating tube; 213. accommodating chamber; 214. elastic layer; 22. ultrasonic generator; 23. ultrasonic transducer; 24. connecting tube; 241. first annular wind cavity; 242. third annular wind cavity; 243. second annular wind cavity; 244. wiring hole; 245. distribution cavity; 25. charge neutralization deagglomeration ring; 251. first deagglomeration ring; 252. second deagglomeration ring; 26. strong air spray ring; 3. vibration screening element; 4. discharge port; 5. cover shell; 6. self-cleaning coating; 7. first ion air duct; 71. first main pipe; 72. first shunt pipe; 8. impact air duct; 81. third main pipe; 82. third shunt pipe; 9. second ion air duct; 91. second main pipe; 92. second shunt pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figures 2 to 3 As shown, the present invention provides a nano calcium carbonate powder rapid drying device, comprising: A discharge channel 1 is used to guide the dried nano calcium carbonate powder; The agglomerate deagglomeration mechanism 2 is arranged below the discharge port of the discharge channel 1 and is used to deagglomerate the nano calcium carbonate powder agglomerates in the falling process; The vibration screening element 3 is located below the agglomerate deagglomeration mechanism 2 and is used to screen the nano calcium carbonate powder after the agglomerate treatment; The vibrating screening element 3 comprises at least one inclined screen and a driving element for driving the screen to vibrate, wherein the screen has screen holes with a predetermined aperture size; The discharge port 4 is used to guide the screened nano calcium carbonate powder; Agglomerate deagglomeration mechanism 2 comprises: A powder receiving platform 21 having a guide slope, wherein an ultrasonic generator 22 and an ultrasonic transducer 23 having at least one output end closely attached to the powder receiving platform 21 are arranged in the powder receiving platform 21; The diameter of the discharge port of the discharge channel 1 is smaller than the diameter of the powder receiving platform 21, so that the falling powder receives the transmitted ultrasonic vibration and undergoes deagglomeration treatment; As the powder falls onto the powder receiving platform 21, the nano calcium carbonate powder agglomerates are broken by ultrasonic vibration and move along the guide slope.

[0022] Compared with the traditional mechanical stirring deagglomeration method, ultrasonic vibration is more gentle and less likely to cause excessive breakage of powder particles. While protecting the original particle size characteristics of the powder, it effectively destroys the adsorption force between agglomerate particles, disintegrates the agglomerates, and improves the particle size uniformity of the product, thereby ensuring the performance stability of nano-calcium carbonate in downstream applications. In addition, with the guiding slope, the broken powder can move along the slope and enter the next processing link naturally and smoothly, which optimizes the flow efficiency of the material, reduces the residence time of the powder on the platform, prevents secondary agglomeration, and ensures the continuity of the deagglomeration effect.

[0023] like Figure 1 , Figure 3 As shown, the powder receiving platform 21 includes a cone 211 and a receiving tube 212 which are fixedly connected in an upper and lower distribution. The receiving tube 212 is provided with a receiving cavity 213 for assembling an ultrasonic generator 22 and an ultrasonic transducer 23. The output end of the ultrasonic transducer 23 fits tightly with the cone 211. The surface of the cone 211 is covered with an elastic layer 214 which conducts and elastically deforms with ultrasonic waves.

[0024] Among them, the elastic layer 214 can be made of polyurethane rubber, fluororubber, fluororubber and other materials; The shape of the cone 211 naturally has the characteristics of guiding the materials to gather and slide down. When the powder falls from above, it will gradually gather to the bottom along the slope of the cone 211 and slide down, ensuring that the powder can enter the subsequent processing flow in an orderly manner and avoiding the accumulation of dead corners on the receiving platform. In conjunction with the elastic layer 214, when the powder impacts the surface of the cone 211 at a certain speed, the elastic layer 214 first plays a buffering role, absorbing the kinetic energy of the powder particles, preventing the particles from being broken due to hard collisions, and protecting the original particle size integrity of the powder. The elastic layer 214 can undergo elastic deformation with the conduction of ultrasonic waves. This dynamic deformation process can not only generate additional vibration energy itself, which is superimposed with ultrasonic vibrations to enhance the destructive power on agglomerates, but also causes the powder particles on the surface of the elastic layer to be in an active state of "micro-jumping", increasing the friction and collision probability between particles, further promoting the disintegration of agglomerates, and assisting ultrasonic waves to achieve more thorough disaggregation.

[0025] like Figures 2 to 3 As shown, the agglomerate deagglomeration mechanism 2 also includes: A connecting tube 24, one end of which is connected to the powder receiving platform 21; The charge neutralization and depolymerization ring 25 ejects ion wind to contact the falling nano calcium carbonate powder; The ions carried in the ion wind neutralize the static charge on the powder surface in equal amounts, eliminating the agglomeration adsorption caused by the electrostatic adsorption of the powder; The strong air spray ring 26 sprays impact wind to contact the falling nano calcium carbonate powder.

[0026] It also includes a cover shell 5, in which the area corresponding to the ion wind ejected by the charge neutralization and depolymerization ring 25 and the area corresponding to the impact wind ejected by the strong air jet ring 26 are roughened and coated with a self-cleaning coating 6.

[0027] Wherein, the self-cleaning coating 6 can be made of materials such as polytetrafluoroethylene and silicone resin; In the production process of nano calcium carbonate powder, static electricity is often one of the important factors leading to powder agglomeration. Therefore, the charge neutralization deagglomeration ring 25 is used to spray ion wind to solve the problem of electrostatic agglomeration, so that the powder particles can enter the subsequent deagglomeration and screening process in a more dispersed state, thereby improving the particle size uniformity and quality stability of the product.

[0028] For some larger agglomerates or powders that are not completely dispersed after charge neutralization, the impact wind of the strong air spray ring can play a key role in further deagglomeration, working in conjunction with the charge neutralization deagglomeration ring to greatly improve the deagglomeration effect, ensuring that the powder can be fully dispersed and meet the strict requirements of subsequent production on powder particle size.

[0029] Moreover, when the powder moves in the housing under the action of ion wind and impact wind, the collision and friction with the roughened surface can further break up the agglomerates that have not been completely deagglomerated, play the role of auxiliary deagglomeration, and enhance the overall deagglomeration effect; At the same time, the applied self-cleaning coating 6 can effectively prevent the powder from adhering to the inner wall of the housing, avoid the normal function of the ion wind and the impact wind being affected by the accumulation of powder, and ensure that the depolymerization process is carried out continuously and efficiently.

[0030] These structures cooperate with each other to deagglomerate the nano-calcium carbonate powder agglomerates from different aspects, effectively improving the dispersion degree and quality of the powder, and providing a guarantee for the high-quality production of nano-calcium carbonate powder.

[0031] Furthermore, the charge neutralization and depolymerization ring 25 and the strong air spray ring 26 are arranged vertically on the connecting tube 24; Moreover, the outer diameters of the connecting tube 24 , the charge neutralization and depolymerization ring 25 and the strong air spray ring 26 are all smaller than the diameter of the powder receiving platform 21 .

[0032] The above design is mainly to reduce the obstruction to the powder falling path, so that the powder can pass through the deagglomeration area more smoothly. At the same time, it also makes it easier for the ion wind and impact wind to act more concentratedly on the falling powder, thereby improving the deagglomeration efficiency and quality.

[0033] like Figure 3 , Figure 4 , Figure 6As shown, the charge neutralizing depolymerizing ring 25 comprises: The first deagglomeration ring 251 and the second deagglomeration ring 252 are respectively arranged on both sides of the strong air spray ring 26. The ion wind trajectories ejected by the first deagglomeration ring 251 and the second deagglomeration ring 252 are respectively arranged to be inclined downward and upward with respect to the central axis of the connecting tube 24; Compared with ion wind in a single direction, ion wind that tilts up and down can more effectively avoid dead corners of static neutralization in the powder flow, because nano-calcium carbonate powder may be unevenly distributed due to various factors during the falling process. If there is only ion wind in a single direction, some powder may not be able to contact the ion wind in time, resulting in residual static electricity and continuing to cause agglomeration. The multi-angle ion wind can effectively make up for this defect, fully cover the falling nano-calcium carbonate powder, ensure that the ions in the ion wind are equally neutralized with the static charge on the surface of the powder, and maximize the elimination of agglomeration caused by static adsorption, thereby improving the dispersion of the powder.

[0034] The trajectory of the impact wind sprayed by the strong air spray ring 26 is arranged perpendicular to the central axis of the connecting tube 24.

[0035] When the powder falls under the action of gravity, the vertical impact wind can act accurately on the core part of the agglomerate, quickly break the structure of the agglomerate, and break up the large agglomerates into smaller particles. It has a significant further deagglomeration effect on the powder agglomerates that have been initially neutralized by the ion wind but are still not completely dispersed. It cooperates with the ion wind of the charge neutralization deagglomeration ring 25 to achieve all-round deagglomeration of powder agglomerates from different angles and methods.

[0036] like Figure 3 , Figure 4 , Figure 5 As shown, the connecting tube 24 is provided with a first annular wind chamber 241, a third annular wind chamber 242 and a second annular wind chamber 243 in the vertical direction, in which the first deagglomeration ring 251, the strong air spray ring 26 and the second deagglomeration ring 252 are respectively installed. Ion wind flows in the first annular wind chamber 241 and the second annular wind chamber 243, and impact wind flows in the third annular wind chamber 242. Realizing independent air supply to the first deagglomeration ring 251, the high-force air spray ring 26 and the second deagglomeration ring 252 can ensure that different deagglomeration links do not interfere with each other, so that the ion wind can accurately neutralize the static charge on the powder surface, and the impact wind can directly impact the powder agglomerates with a strong force, thereby improving the pertinence and effectiveness of the deagglomeration effect, and providing a strong guarantee for the full deagglomeration of nano calcium carbonate powder.

[0037] A wiring hole 244 connected to the powder receiving platform 21 is also provided in the connecting tube 24. The inner diameters of the first annular air chamber 241, the third annular air chamber 242 and the second annular air chamber 243 are all larger than the maximum radial distance between the outermost circumference of the wiring hole 244 and the central axis of the connecting tube 24.

[0038] Such a design can effectively avoid mutual interference between the wiring holes and the wind cavity. The wiring holes are used to connect the ultrasonic equipment in the powder receiving platform 21, ensuring the smoothness of the wind path and the safety of the line, preventing equipment failure due to the intersection or mutual influence of the wind path and the line, and improving the stability and reliability of the equipment operation.

[0039] like Figure 4 , Figure 7 As shown, it also includes a first ion wind duct 7, an impact wind duct 8 and a second ion wind duct 9 which are respectively connected to the first annular wind cavity 241, the third annular wind cavity 242 and the second annular wind cavity 243; The first ion air duct 7 , the impact air duct 8 and the second ion air duct 9 are radially arranged from the inside to the outside with the central axis of the connecting tube 24 as the axis. The inner circle diameter of the second annular air cavity 242 is larger than the maximum radial distance between the outermost circumference of the impact air duct 8 and the central axis of the connecting tube 24 .

[0040] The first ion air duct 7, the impact air duct 8 and the second ion air duct 9 are specific structural pipes for each exclusive air path. The air path structure is only connected to the corresponding air cavity and does not pass through other air cavities, so as to avoid additional unstable airflow caused by turbulence to interfere with other air paths and accurately apply wind force to the falling nano calcium carbonate powder.

[0041] Due to the complex and changeable agglomeration of nano calcium carbonate powder, sometimes the electrostatic agglomeration problem is prominent during the production process, and sometimes there are more large and stubborn agglomerates. The independent air path can adjust the air volume and wind speed of each air duct according to the actual working conditions, and strengthen a certain deagglomeration method in a targeted manner.

[0042] like Figure 7 As shown, the first ion wind pipe 7 includes a first main pipe 71 and a first shunt pipe 72. The first shunt pipe 72 has at least two ends, one end is connected to the first main pipe 71, and the other end is connected to the first annular wind chamber 241. The second ion wind pipe 9 includes a second main pipe 91 and a second branch pipe 92. The second branch pipe 92 has at least two ends, one end is connected to the second main pipe 91, and the other end is connected to the second annular wind chamber 243. The impact air duct 8 includes a third main pipe 81 and a third diverter pipe 82 . The third diverter pipe 82 has at least two ends, one end is connected to the third main pipe 81 , and the other end is connected to the third annular air cavity 242 .

[0043] Specifically, it also includes an impact wind generator and two ion wind generators. The air delivery ends of the two ion wind generators are respectively connected to the other ends of the first main pipe 71 and the second main pipe 91. The air delivery end of the impact wind generator is connected to the other end of the third main pipe 81. With the use of the shunt pipe, the wind flow in the main pipe is accurately distributed to each annular wind cavity. like Figure 5 As shown, it also includes a distribution chamber 245 disposed in the connection tube 24; The first main pipe 71 is coaxially arranged with the connecting tube 24, and the second branch pipe 92 and the third branch pipe 82 are distributed around the first main pipe 71 as the axis and are arranged in upper and lower layers; The first main pipe 71 , the second main pipe 91 , the third main pipe 81 , the second branch pipe 92 , and the third branch pipe 82 are all located in the distribution chamber 245 .

[0044] The distribution chamber 245 can prevent the air duct and the diversion pipe from being disturbed by external factors, such as the impact of powder, the erosion of chemical substances, etc.

[0045] Furthermore, the connecting tube 24 can be fixed in the cover shell 5 by a supporting tube, the supporting tube passes through the vibration screening element 3, and the main pipe can be set in the supporting tube for integrated use. The connecting tube 24 can also be directly fixed to the inner wall of the cover shell 5 through a supporting rod without being associated with the vibration screening element 3. The above two are only possible fixing methods, and the operator can design the fixing structure according to actual conditions.

[0046] The working principle and use process of the present invention: After the nano calcium carbonate powder is dried, the dried powder is discharged through the discharge channel 1. The powder first falls on the elastic layer 214 covered on the surface of the cone 211. The ultrasonic generator 22 is started, prompting the ultrasonic transducer 23 to convert electrical energy into high-frequency mechanical vibration, which is transmitted to the elastic layer 214 through the cone 211. The elastic layer 214 undergoes elastic deformation as the ultrasonic wave is transmitted, buffering the falling powder particles and continuously vibrating elastically to break and deagglomerate the agglomerates. The broken powder moves along the guide slope of the cone 211 and falls from the area between the cover 5 and the powder receiving platform 21.

[0047] The independent wind paths of the first ion wind duct 7, the impact wind duct 8 and the second ion wind duct 9 guide the ion wind and the impact wind to the first annular wind cavity 241, the third annular wind cavity 242 and the second annular wind cavity 243 respectively, and then the first deagglomeration ring 251 and the second deagglomeration ring 252 respectively spray out ion wind trajectories inclined downward and upward, so that the ion wind contacts the falling powder in all directions, and the ions carried in the ion wind are equally neutralized with the static charge on the surface of the powder, effectively eliminating the agglomeration adsorption formed by the electrostatic adsorption of the powder, so that the powder particles are further dispersed, and the high-force air spray ring 26 further sprays a horizontal impact wind trajectory to impact the powder agglomerates, break up the powder particles that are still gathered together, and cooperate with the ion wind to complete the deagglomeration operation.

[0048] The powder after deagglomeration treatment continues to fall and reaches the vibration screening element 3. The vibration screening element 3 uses the vibration principle to screen the nano calcium carbonate powder according to the particle size, screens out the powder that meets the requirements, and guides it out through the discharge port 4 to enter the subsequent processing link, completing the entire process.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nano calcium carbonate powder rapid drying device, characterized in that: include: A discharge channel (1) for guiding the dried nano-calcium carbonate powder; An agglomerate deagglomeration mechanism (2) is arranged below the discharge port of the discharge channel (1) and is used to deagglomerate the nano-calcium carbonate powder agglomerates during the falling process; A vibration screening element (3) is located below the agglomerate deagglomeration mechanism (2) and is used to screen the nano calcium carbonate powder after the agglomerate treatment; A discharge port (4) for guiding the screened nano calcium carbonate powder; The aggregate deagglomeration mechanism (2) comprises: A powder receiving platform (21) having a guide slope, wherein an ultrasonic generator (22) and at least one ultrasonic transducer (23) having an output end tightly fitted to the powder receiving platform (21) are provided in the powder receiving platform (21); As the powder falls onto the powder receiving platform (21), the nano calcium carbonate powder agglomerates are broken by ultrasonic vibration and move along the guide slope.

2. A nano calcium carbonate powder rapid drying device according to claim 1, characterized in that: The powder receiving platform (21) comprises a cone (211) and a receiving tube (212) which are fixedly connected to each other in an upper and lower distribution. The receiving tube (212) is provided with a receiving cavity (213) for assembling an ultrasonic generator (22) and an ultrasonic transducer (23). The output end of the ultrasonic transducer (23) is tightly fitted with the cone (211). The surface of the cone (211) is covered with an elastic layer (214) which is elastically deformed and conducts with ultrasonic waves.

3. A nano calcium carbonate powder rapid drying device according to claim 1, characterized in that: The aggregate deagglomeration mechanism (2) further comprises: A connecting tube (24), one end of which is connected to the powder receiving platform (21); The charge neutralization depolymerization ring (25) ejects ion wind to contact the falling nano calcium carbonate powder; The ions carried in the ion wind neutralize the static charge on the powder surface in equal amounts, eliminating the agglomeration adsorption caused by the electrostatic adsorption of the powder; The strong air spray ring (26) sprays impact wind to contact the falling nano calcium carbonate powder.

4. A nano calcium carbonate powder rapid drying device according to claim 3, characterized in that: It also comprises a cover shell (5), wherein the area inside the cover shell (5) corresponding to the ion wind ejected by the charge neutralization and depolymerization ring (25) and the area corresponding to the impact wind ejected by the strong air ejection ring (26) are roughened and coated with a self-cleaning coating (6).

5. A nano calcium carbonate powder rapid drying device according to claim 3, characterized in that: The charge neutralization and depolymerization ring (25) and the high-force air spray ring (26) are arranged vertically on the connecting tube (24); Furthermore, the outer diameters of the connecting tube (24), the charge neutralization and depolymerization ring (25), and the high-force air spray ring (26) are all smaller than the diameter of the powder receiving platform (21).

6. A nano calcium carbonate powder rapid drying device according to claim 3, characterized in that: The charge neutralizing depolymerizing ring (25) comprises: A first deagglomeration ring (251) and a second deagglomeration ring (252) are respectively arranged on both sides of the strong air spray ring (26), wherein the ion wind trajectories ejected by the first deagglomeration ring (251) and the second deagglomeration ring (252) are respectively arranged to be inclined downward and upward with respect to the central axis of the connection tube (24); The trajectory of the impact wind sprayed by the high-force air spray ring (26) is arranged perpendicular to the central axis of the connecting tube (24).

7. A nano calcium carbonate powder rapid drying device according to claim 6, characterized in that: The connecting tube (24) is provided with a first annular wind chamber (241), a third annular wind chamber (242) and a second annular wind chamber (243) in sequence along the vertical direction, in which a first deagglomeration ring (251), a strong air spray ring (26) and a second deagglomeration ring (252) are respectively installed. Ionic wind flows in the first annular wind chamber (241) and the second annular wind chamber (243), and impact wind flows in the third annular wind chamber (242); The connecting tube (24) is further provided with a wiring hole (244) in communication with the powder receiving platform (21); the inner diameters of the first annular air cavity (241), the third annular air cavity (242) and the second annular air cavity (243) are all larger than the maximum radial distance between the outermost circumference of the wiring hole (244) and the central axis of the connecting tube (24).

8. The nano calcium carbonate powder rapid drying device according to claim 7, characterized in that: It also includes a first ion air duct (7), an impact air duct (8), and a second ion air duct (9) which are respectively connected to the first annular air cavity (241), the third annular air cavity (242), and the second annular air cavity (243); The first ion air duct (7), the impact air duct (8) and the second ion air duct (9) are arranged in sequence from the inside to the outside in a radial pattern with the central axis of the connecting tube (24) as the axis, and the inner diameter of the second annular air cavity (242) is greater than the maximum radial distance between the outermost circumference of the impact air duct (8) and the central axis of the connecting tube (24).

9. A nano calcium carbonate powder rapid drying device according to claim 8, characterized in that: The first ion wind pipe (7) comprises a first main pipe (71) and a first shunt pipe (72); the first shunt pipe (72) has at least two ends, one end is connected to the first main pipe (71), and the other end is connected to the first annular wind cavity (241); The second ion wind pipe (9) comprises a second main pipe (91) and a second shunt pipe (92); the second shunt pipe (92) has at least two ends, one end is connected to the second main pipe (91), and the other end is connected to the second annular wind cavity (243); The impact air duct (8) comprises a third main pipe (81) and a third diverter pipe (82); the third diverter pipe (82) has at least two ends, one end is connected to the third main pipe (81), and the other end is connected to the third annular air cavity (242).

10. The nano calcium carbonate powder rapid drying device according to claim 9, characterized in that: It also includes a distribution chamber (245) disposed in the connection cylinder (24); The first main pipe (71) and the connecting tube (24) are coaxially arranged, and the second flow dividing pipe (92) and the third flow dividing pipe (82) are distributed in a surrounding manner with the outside of the first main pipe (71) as the axis and are arranged in upper and lower layers; The first main pipe (71), the second main pipe (91), the third main pipe (81), the second flow dividing pipe (92) and the third flow dividing pipe (82) are all located in the distribution chamber (245).

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