A high temperature setting phase change particle manufacturing apparatus and method

Abstract

The application relates to the technical field of phase change heat storage packaging, in particular to a high-temperature shaped phase change particle manufacturing device and method, which comprises a dissolving and stirring mechanism, a mixing and forming mechanism and a screening mechanism; the dissolving and stirring mechanism is used for uniformly dissolving a phase change material in a binder solution to obtain a phase change material solution and uniformly flowing into the mixing and forming mechanism in a filament form; the mixing and forming mechanism is used for uniformly mixing the phase change material solution with a skeleton support material, then extruding and cutting the phase change material solution into particles, discharging the particles and falling into the screening mechanism; the screening mechanism screens qualified shaped phase change particles from the falling particles, and the qualified shaped phase change particles are used for subsequent sintering and cooling to obtain final shaped phase change particles. The application shows its innovation value in improving production efficiency, ensuring operation safety and widening the application range of materials, and makes an important contribution to the progress of material preparation technology in the fields of energy and chemical industry.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of phase change heat storage packaging, and particularly relates to a high-temperature shaped phase change particle manufacturing device and method. BACKGROUND

[0002] Thermal energy storage is crucial in the contemporary energy industry. With the continuous development of renewable energy, thermal energy storage technology can alleviate the instability of energy supply caused by renewable energy fluctuations. In addition, thermal energy storage can improve energy utilization efficiency, balance power grid load, and provide additional energy support during peak demand. According to the storage medium, thermal energy storage technology can be divided into sensible heat, latent heat, and thermochemical energy storage. Due to its advantages in isothermal melting / solidification process, energy storage density, and capital investment, solid-liquid phase change materials have attracted widespread attention as a viable option for latent heat storage. Inorganic salts, medium-high temperature phase change materials have attracted interest due to their low price, but their low thermal conductivity and susceptibility to corrosion limit their application. However, the development of shaped phase change materials is expected to solve these limitations. Shaped phase change materials are composed of phase change materials and skeleton support materials.

[0003] Common preparation techniques for shaped phase change materials include cold-pressing hot-sintering, impregnation, and cold-sintering. Cold-pressing hot-sintering is considered one of the most popular techniques for preparing medium-high temperature shaped phase change materials. The preparation process of cold-pressing hot-sintering is as follows: first, grind the phase change material and the skeleton support material to the desired size. Then, mix them uniformly and pour them into a mold, and apply appropriate pressure to shape the sample into a dense structure. Finally, sinter the mixture at a temperature above the melting point of the phase change material. The liquid phase change material adheres to the skeleton support material by high interfacial energy and capillary force, and solidifies on the surface of the skeleton support material in a solid state, thereby maintaining the stability of the overall shape and preventing the phase change material from leaking. Depending on the process, shaped phase change materials prepared by impregnation can be divided into melt impregnation and vacuum impregnation. Melt impregnation is a process in which molten phase change material penetrates into a porous skeleton support material. With vacuum impregnation, the phase change material is more easily penetrated into the skeleton support material with the help of vacuum treatment. In the above impregnation process, it can be found that melt impregnation may also involve pressure molding or repeatable melt impregnation processes of the skeleton support material, which have a more complex preparation process, and many studies report incomplete impregnation. Therefore, the assistance of vacuum is required, but vacuum impregnation requires additional vacuum systems and good equipment sealing. This also increases the process cost and the complexity of the preparation system.

[0004] Cold-pressing sintering does not require high-temperature heating of the phase change material to melt it. In this method, the phase change material and the skeleton support material are mixed, water is sprayed to eliminate sharp edges between particles, the sample is introduced into a mold, and the material is shaped into a dense structure under uniaxial hot pressing at medium temperature. However, this method also requires high pressure and mold heating, further increasing the complexity of manufacturing.

[0005] In summary, the above three manufacturing methods involve processes such as constant pressure forming and crushing, and the operation mode is relatively complex and not suitable for large-scale production. SUMMARY

[0006] In order to solve the above technical problems existing in the prior art, the present application proposes a high-temperature shaped phase change particle manufacturing device and method suitable for large-scale application and safe operation, and the specific technical scheme is as follows:

[0007] A high-temperature shaped phase change particle manufacturing device, comprising: a dissolving and stirring mechanism, a mixing and forming mechanism, and a screening mechanism, the dissolving and stirring mechanism is used to stir the phase change material to uniformly dissolve in the binder solution to obtain a phase change material solution, the dissolving and stirring mechanism comprises: a stirring cylinder and a perforated disc below the stirring cylinder, the stirring cylinder comprises a bottom cover which can be opened and closed, the flow of the solution in the cylinder into the perforated disc is controlled by opening and closing the bottom cover, and the solution falls into the mixing and forming mechanism through the perforated disc;

[0008] The mixing and forming mechanism is used to mix the phase change material solution and the skeleton support material uniformly and then perform extrusion cutting to discharge the particles, the mixing and forming mechanism comprises: a shell one, a shell two, a shell three, a particle plate, a rotating shaft, and a cutter group, the shell one, the shell two, and the shell three are connected in series in a concentric manner to form a channel cavity, and the shell one is provided with a flared portion corresponding to the perforated disc to access the phase change material solution and put in the skeleton support material; the rotating shaft is arranged in the channel cavity in a penetrating manner, and a spiral assembly is arranged on the shaft body of the rotating shaft to stir and push the mixed material; the particle plate is installed at the outlet of the channel cavity at the end of the shell three, and the cutter group is fixedly installed at the end of the rotating shaft and cooperates with the particle plate to cut the mixed material into particles;

[0009] The screening mechanism is used to screen the qualified shaped phase change particles from the discharged particles.

[0010] Further, the shell two and the shell three are hollow cylindrical structures, and a baffle assembly which can be opened and closed is arranged between the shell two and the shell three, the baffle assembly comprises: a baffle cover, a hollow baffle shell, and a plurality of solid baffle pieces, the baffle cover is a circular ring structure, and a plurality of clamping grooves are arranged on the annular side wall of the baffle cover, the hollow baffle shell and the solid baffle pieces are arranged in a fan-shaped structure between the rotating shaft and the baffle cover, wherein the outer diameter of the solid baffle piece corresponds to the inner diameter of the shell two, and a push handle is arranged on each solid baffle piece, and each push handle is movably arranged in the corresponding clamping groove; the hollow baffle shell is provided with an internal space for accommodating the five solid baffle pieces;

[0011] When the baffle assembly is closed, the push handles are controlled to move in the clamping grooves, thereby driving the corresponding solid baffle pieces to move out of the internal space of the hollow baffle shell, and then the solid baffle pieces are arranged and spliced in an interleaved manner to form a circular array around the rotating shaft, so that the channel between the shell two and the shell three is closed.

[0012] When the baffle assembly is opened, the control pusher moves in the clamping groove, thereby driving the corresponding solid baffle plate to fold and stack inside the hollow baffle shell, and opening the channel between the second shell and the third shell.

[0013] Further, the stirring barrel further comprises a stirring rod, a top cover, and a barrel body, the top cover and the bottom cover are respectively arranged at the top and bottom of the barrel body and tightly fit with the barrel body to form a stirring chamber; the perforated disc is arranged below the bottom cover and the top disc opening thereof tightly fits with the bottom cover; the top cover and the bottom cover are both composed of two half circular plates, and a handle is welded at the outer periphery of the upper surface of each half circular plate, wherein the two half circular plates of the top cover are composed and a shaft hole is formed at the center thereof, and a sealing element is arranged at the lower surface of the top cover and the interface between the top cover and the barrel body; similarly, the upper and lower surfaces of the two half circular plates of the bottom cover are respectively arranged with corresponding sealing elements at the interface between the bottom cover and the barrel body and the perforated disc; the stirring rod body is provided with a plurality of fin series connected spiral fittings, and the handle of the stirring rod is connected with the top cover through bearing fitting between the top cover shaft hole and the top cover; heating wires are arranged on the outer wall of the barrel body.

[0014] Further, the expansion is directly opposite to the perforated disc and externally tangent to the perforated disc, or the expansion is directly opposite to the perforated disc and the minimum length of the expansion edge is greater than the outer diameter size of the entire dissolution and stirring mechanism above.

[0015] Further, a guide plate is arranged on the expansion for guiding the scaffold support material into the expansion.

[0016] Further, the second shell comprises two half cylindrical thin walls, and butt plates are arranged at the two ends of the thin walls, and the two half cylindrical thin walls are fixed and connected through the butt plates by bolts to assemble the second shell.

[0017] Further, a connecting hole is arranged in the middle of the particle plate, and through holes with the same hole diameter are arranged in other areas, and the hole diameter of the through hole can be designed according to requirements; the end of the rotating shaft penetrates through the connecting hole.

[0018] Further, the cutter group comprises an inner cutter and an outer cutter, and the inner cutter and the outer cutter are installed on the rotating shaft and rotate with the shaft and are respectively located on both sides of the particle plate.

[0019] Further, the spiral assembly comprises a spiral propelling fitting one, a spiral fin fitting, and a spiral propelling fitting two, the spiral propelling fitting one is located in the first shell, the spiral fin fitting is located in the second shell, and the spiral propelling fitting two is located in the third shell.

[0020] A high-temperature setting phase change particle manufacturing method, comprising:

[0021] Step one: weigh the appropriate amount of binder and mix it with a certain amount of deionized water, introduce it into the stirring chamber of the dissolving stirring mechanism, heat the mixture to 70~80℃ with the aid of heating wires, until the binder solution becomes transparent gel, then add the phase change material into the stirring chamber, continue to heat and stir until the phase change material is completely dissolved;

[0022] Step two: weigh the skeleton support material, introduce it into the shell one through the flow guide plate, at the same time, open the bottom cover of the dissolving stirring mechanism, make the phase change material solution flow into the shell one through the perforated disc, start the rotating shaft, use the spiral propelling accessory one for preliminary mixing and pushing into the shell two;

[0023] Step three: use the closed baffle assembly to prevent the phase change material and the skeleton support material from entering the shell three, under the action of the spiral fin accessory, the two materials are uniformly mixed, at this time, start the step one operation of the next cycle;

[0024] Step four: the baffle assembly changes from the closed state to the open state, and the step two operation of the next cycle is started; the premixed material, i.e. the preliminarily mixed material, enters the shell two under the pushing of the spiral propelling accessory one, at the same time, the currently well-stirred material in the shell two enters the shell three under the pushing of the premixed material and the cooperation of the spiral propelling accessory two, for extrusion work; under the synergistic action of the spiral propelling accessory two, the particle plate, the internal cutter and the external cutter, the phase change particles are completed; when the currently well-stirred material completely enters the shell three, the state of the baffle assembly changes from the open state to the closed state;

[0025] Step five: screen the cut-shaped phase change particles through the screening mechanism, and then put them into a hot air oven to evaporate the moisture inside the particles, and at the same time, vibrate the screen to avoid particle adhesion;

[0026] Step six: put the phase change particles into a muffle furnace for sintering, at a predetermined heating rate, to the sintering temperature, and keep it for 1.5~3 hours, then cool down, after the particles cool down to room temperature, the final shaped phase change particles are obtained.

[0027] In the field of energy and chemical industry, the present application has the following innovations and beneficial effects:

[0028] 1. Industrialized batch production capacity: the present application simplifies the preparation process of the shaped phase change particles, realizes large-scale production in a single cycle. This innovative process not only improves the production efficiency, but also effectively reduces the labor cost through integrated mixing and molding design, providing a practical solution for large-scale industrial production.

[0029] 2. Operational flexibility and low-temperature preparation: The preparation process of the present invention exhibits extremely high operational flexibility and adaptability, enabling the preparation of materials at lower temperature conditions. This is particularly crucial for the preparation of high-temperature application materials, while ensuring the safety and controllability of the entire preparation process.

[0030] 3. Wide applicability: The preparation method of the present invention is not limited to specific phase change materials or skeleton support materials, showing wide applicability. This provides diverse options for material selection in different application scenarios, enhancing the flexibility and practicality of the present invention in diversified industrial applications. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is an external overall structure schematic diagram of a high-temperature shaped phase change particle manufacturing device of the present embodiment;

[0032] Figure 2 is an internal overall structure schematic diagram of a high-temperature shaped phase change particle manufacturing device of the present embodiment;

[0033] Figure 3 is a structure schematic diagram of the baffle piece in the closed state of the present embodiment;

[0034] Figure 4 is a structure schematic diagram of the baffle piece in the open state of the present embodiment;

[0035] In the figure, 1-1 is a stirring rod, 1-2 is a top cover, 1-3 is a heating wire, 1-4 is a cylinder, 1-5 is a bottom cover, 1-6 is a perforated disc, 2-1 is a flow guide plate, 2-2 is an outer shell one, 2-3 is an outer shell two, 2-5 is an abutting plate, 3-1 is an outer shell three, 3-2 is a particle plate, 3-3 is an outer cutter, 3-4 is an inner cutter, 4-1 is a screen, and 4-2 is a base;

[0036] 5 is a rotating shaft, 5-1 is a spiral propelling accessory one, 5-2 is a spiral fin accessory, 5-3 is a spiral propelling accessory two, 3-3 is an outer cutter, and 3-4 is an inner cutter;

[0037] 2-4 is a baffle assembly, 2-41 is a baffle cover, 2-42 is a hollow baffle shell, 2-43 is a baffle piece one, 2-44 is a baffle piece two, 2-45 is a baffle piece three, 2-46 is a baffle piece four, 2-47 is a baffle piece five, 2-48 is a clamping groove, and 2-49 is a clamping groove plug. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and technical effect of the present invention clearer, the present invention is further described in detail below in combination with the drawings and examples of the specification.

[0039] As Figure 1 and Figure 2As shown in the figure, a high-temperature shaped phase change particle manufacturing apparatus according to an embodiment of the present invention includes: a dissolving and stirring mechanism, a mixing and forming mechanism, and a sieving mechanism. The dissolving and stirring mechanism is used to uniformly dissolve the phase change material in a binder solution to obtain a phase change material solution, which then flows into the mixing and forming mechanism in a filamentous form. The mixing and forming mechanism is used to uniformly mix the phase change material solution with the skeleton support material, and then extrude and cut it into particles for discharge, which fall into the sieving mechanism. The sieving mechanism then selects qualified shaped phase change particles from the falling particles for subsequent sintering and cooling to obtain the final shaped phase change particles.

[0040] Specifically, the dissolving and stirring mechanism is located above the mixing and forming mechanism, and so on. Figure 2 The dissolving and stirring mechanism includes: stirring rod 1-1, top cover 1-2, cylinder 1-4, bottom cover 1-5, and perforated plate 1-6.

[0041] The top cover 1-2 and bottom cover 1-5 are respectively located at the top and bottom of the cylinder 1-4 and fit tightly with the cylinder 1-4 to form a mixing chamber. The perforated plate 1-6 is located below the bottom cover 1-5, with its top opening fitting tightly with the bottom cover 1-5. Its bottom panel adopts a perforated plate design, allowing the incoming liquid to flow out evenly in a thread-like manner, facilitating a more uniform mixing process in the subsequent process. Both the top cover 1-2 and the bottom cover 1-5 are composed of two semi-circular plates joined together. Each semi-circular plate has a handle welded to its outer periphery on its upper surface for easy operation, facilitating quick disassembly, material loading, and smooth discharge of liquid from the chamber. The two semi-circular plates of the top cover 1-2 form a shaft hole at the center after being joined together, and a sealing element is provided at the junction of its lower surface and the cylinder 1-4 to ensure sealing during the mixing process and prevent liquid splashing or overflow. Similarly, the upper and lower surfaces of the two semi-circular plates of the bottom cover 1-5 also have corresponding sealing elements at the junctions with the cylinder 1-4 and the perforated plate 1-6, respectively. The stirring rod 1-1 is located inside the cylinder 1-4. The main body is equipped with a spiral fitting consisting of multiple fins connected in series. This spiral fitting structure aims to achieve thorough stirring of the liquid within the cavity, ensuring uniform distribution of the phase change material during the preparation process. The handle of the stirring rod 1-1 is located outside the cylinder 1-4. A bearing connection is used between the handle and the shaft hole of the top cover 1-2 to ensure stable support and rotation of the stirring rod 1-1 on the top cover 1-2. A heating wire 1-3 is arranged around the outer wall of the cylinder 1-4. The heating wire 1-3 is used to precisely control the temperature of the liquid being stirred within the cavity, adapting to the heat treatment requirements of different phase change materials.

[0042] Continue to refer to Figure 2 The mixing and forming mechanism includes: a guide plate 2-1, a first outer shell 2-2, a second outer shell 2-3, a third outer shell 3-1, a particle plate 3-2, an outer cutter 3-3, an inner cutter 3-4, and a rotating shaft 5.

[0043] The outer shell 2-2, outer shell 2-3, and outer shell 3-1 are all hollow cylindrical structures, and are concentrically connected in sequence to form a channel cavity for mixing and transporting materials. The rotating shaft 5 passes through the cavity from outer shell 2-2 to outer shell 3-1.

[0044] The outer shell 2-2 has an upwardly extending flared opening on its side wall. The flared opening is directly opposite the porous disk 1-6 and is externally tangent to the porous disk 1-6, or the flared opening is directly opposite the porous disk 1-6 and the minimum length of the flared opening edge is greater than the outer diameter of the entire dissolving and stirring mechanism above. The guide plate 2-1 is connected to the flared opening, which facilitates the smooth flow of the skeleton support material from the top of the guide plate 2-1 into the outer shell 2-2, ensuring effective guidance and continuous supply of the material.

[0045] The outer shell 2-3 is a detachable and assembleable structure, specifically comprising: two semi-cylindrical thin walls, with mating plates 2-5 extending from both ends of the thin walls. The two semi-cylindrical thin walls can be fixedly connected by bolts to the mating plates 2-5 to assemble the outer shell 2-3. This structure allows for easy disassembly of the outer shell 2-3, facilitating cleaning and maintenance.

[0046] The particle plate 3-2 is installed at the end outlet of the outer shell 3-1. The particle plate 3-2 has a connecting hole for installing the rotating shaft 5 in the middle, while other areas are provided with through holes of the same diameter. The diameter of the through holes can be designed according to requirements, allowing the production of phase change particles of different sizes.

[0047] The inner cutter 3-4 and the outer cutter 3-3 are mounted on the rotating shaft 5 and located on the inner and outer sides of the particle plate 3-2, respectively. The inner cutter 3-4 is used to preliminarily cut the phase change material before it enters the particle plate 3-2, so as to facilitate the smooth passage of the material through the through holes of the particle plate 3-2 and reduce the risk of blockage caused by large pieces of material. The outer cutter 3-3 performs final finishing on the phase change material passing through the through holes of the particle plate 3-2, ensuring that the shape and size of the particles accurately meet the predetermined requirements, thereby improving the regularity and consistency of the particles.

[0048] The rotating shaft 5, located within the cavity, is divided into three parts. The shaft within outer shell 2-2 and outer shell 3-1 are respectively equipped with identical spiral propulsion components 5-1 and 5-3. The shaft within outer shell 2-3 is equipped with multiple spiral fin components 5-2. The mixed material is sequentially propelled and stirred by the spiral propulsion component 5-1, further uniformly stirred by the spiral fin components 5-2, and extruded and compressed by the spiral propulsion component 5-3, ultimately exiting the particle plate 3-2 through a cutter.

[0049] In one embodiment, a baffle assembly 2-4 is further provided between the second outer shell 2-3 and the third outer shell 3-1, which can control the opening and closing of the cavity channel, thereby adjusting the uniformity of mixing and controlling the particle preparation progress. Specifically, for example... Figure 3 and Figure 4 As shown, the baffle assembly 2-4 includes: a baffle cover 2-41, a hollow baffle shell 2-42, and five solid baffle plates. The baffle cover 2-41 has a circular structure with five slots on its annular sidewall. Combined with the through-hole arrangement of the rotating shaft 5, the hollow baffle shell 2-42 and the solid baffle plates are arranged in a fan-shaped structure between the rotating shaft 5 and the baffle cover 2-41. The outer diameter of the solid baffle plates corresponds to the inner diameter of the outer shell 2-3, and each solid baffle plate has a pusher. The hollow baffle shell 2-42 has a dedicated internal space for storing the five solid baffle plates. During the stirring operation, these five solid baffle plates can rotate flexibly under the action of the pusher, moving out of the hollow baffle shell 2-42 and forming a new circular array in an alternating manner, thus closing the baffle assembly 2-4 and preventing the mixture from accidentally entering the outer shell 3-1. The five solid baffles are arranged in an alternating sequence from the inside out: baffle 1 (2-43), baffle 2 (2-44), baffle 3 (2-45), baffle 4 (2-46), and baffle 5 (2-47), with each baffle closely fitted together. When the equipment is ready to perform the extrusion operation, these five baffles can be rotated by pushing the pusher and closed into the internal space of the hollow baffle shell 2-42, providing the necessary space for the smooth passage of the mixture. At this time, the baffle assembly 2-4 is in the open state. To prevent the mixture from being exposed through the slot 2-48 during the extrusion process, a corresponding slot plug 2-49 can be installed to plug the slot 2-48 and prevent material leakage.

[0050] Following reference Figure 1 The screening mechanism is designed to achieve precise screening of qualified particles and includes a screen 4-1 and a base 4-2. The screen 4-1 is used to screen out unformed powdery phase change particles, while the base 4-2 collects these unqualified particles for subsequent reuse. The formed particles remain on the screen 4-1, ensuring the quality of the final product.

[0051] In conjunction with the above-described apparatus, this invention provides a method for manufacturing high-temperature shaped phase change particles, comprising the following steps:

[0052] Step 1: Accurately weigh an appropriate amount of binder, such as sodium carboxymethyl cellulose, and mix it with a measured amount of deionized water. Pour this mixture into the stirring chamber of the dissolving and stirring mechanism. With the assistance of heating wires 1-3, heat the mixture to 70-80°C until the binder solution becomes a transparent gel. Then, add a certain amount of phase change material, such as nitrate or carbonate, to the stirring chamber and continue heating and stirring until the salt particles are completely dissolved.

[0053] Step Two: Weigh a certain amount of the skeleton support material, such as steel slag, dolomite, fly ash, or diatomaceous earth, and introduce it into the outer shell 2-2 through the guide plate 2-1. Simultaneously, open the bottom cover 1-5 of the dissolving and stirring mechanism, allowing the phase change material solution to flow into the outer shell 2-2 through the porous disk 1-6. Start the rotating shaft 5, using the screw propulsion accessory 5-1 to achieve preliminary mixing, and then push it into the outer shell 2-3.

[0054] Step 3: Use the closed baffle assembly 2-4 to prevent the phase change material and the skeleton support material from entering the outer shell 3-1. Under the action of the spiral fin accessory 5-2, the two materials achieve uniform mixing. At this point, the next cycle of Step 1 can begin.

[0055] Step Four: Baffle assembly 2-4 changes from the closed state to the open state, initiating the next cycle of Step Two. The premixed material, i.e., the material after initial mixing, enters outer shell 2-3 under the action of screw propulsion accessory 5-1. Simultaneously, the material currently circulating and stirred in outer shell 2-3 enters outer shell 3-1 under the pushing action of the premixed material and the cooperation of screw propulsion accessory 5-3, for extrusion. With the coordinated action of screw propulsion accessory 5-3, particle plate 3-2, inner cutter 3-4, and outer cutter 3-3, the phase change particles are produced. Once the currently circulated and stirred material has completely entered outer shell 3-1, the state of baffle assembly 2-4 changes from the open state to the closed state.

[0056] Step 5: The cut phase change granules are screened through a sieving mechanism and then placed in a hot air oven to evaporate the moisture inside the granules. To prevent the dried granules from sticking together, a vibrating screen is used to prevent sticking.

[0057] Step Six: The phase change particles are then placed in a muffle furnace for sintering. The temperature is raised to the predetermined sintering temperature at a predetermined heating rate and held for 1.5 to 3 hours, followed by cooling at an appropriate cooling rate. After the particles cool to room temperature, the final shaped phase change particles are obtained, completing the preparation of shaped phase change particles suitable for high-temperature applications.

[0058] The concentration of the binder solution in step one depends on the properties of the binder; for example, the concentration of sodium carboxymethyl cellulose is controlled at 2-3%. The mass ratio of phase change material to skeleton support material is 1.0-4.0:1. The amount of water added is related to the density of the skeleton support material, and its mass ratio to the skeleton support material is 1.9-13.0:1.

[0059] In step six, the set sintering temperature should be higher than the phase change temperature of the phase change material, and can be adjusted according to the highest operating temperature required in actual applications to ensure the performance stability and reliability of the phase change particles in high-temperature thermal storage applications.

[0060] In summary, this invention demonstrates its innovative value in improving production efficiency, ensuring operational safety, and expanding the application range of materials, making significant contributions to the advancement of material preparation technology in the energy and chemical industries.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Although the implementation process of the present invention has been described in detail above, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. All modifications and equivalent substitutions made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-temperature sizing phase change particle manufacturing apparatus, comprising: The dissolving and stirring mechanism, the mixing and forming mechanism, and the screening mechanism are characterized in that the dissolving and stirring mechanism is used to stir the phase change material so that it is uniformly dissolved in the binder solution to obtain the phase change material solution. The dissolving and stirring mechanism includes: a stirring cylinder and a porous disk (1-6) below it. The stirring cylinder includes an openable and closable bottom cover (1-5). The solution in the cylinder flows into the porous disk (1-6) through the opening and closing of the bottom cover (1-5) and falls into the mixing and forming mechanism through the porous disk (1-6). The mixing and forming mechanism is used to mix the phase change material solution and the skeleton support material evenly, and then extrude and cut them into particles for discharge. The mixing and forming mechanism includes: outer shell 1 (2-2), outer shell 2 (2-3), outer shell 3 (3-1), particle plate (3-2), rotating shaft (5), and cutter assembly. The outer shell 1 (2-2), outer shell 2 (2-3), and outer shell 3 (3-1) are connected concentrically in sequence to form a channel cavity. The outer shell 1 (2-2) is provided with an flared opening corresponding to the perforated disk (1-6) for receiving the phase change material solution and placing the skeleton support material. The rotating shaft (5) is installed through the channel cavity. Its shaft is provided with a spiral assembly for stirring and propelling the mixed material. The particle plate (3-2) is installed at the outlet of the channel cavity at the end of the outer shell 3 (3-1). The cutter assembly is fixedly installed at the end of the rotating shaft (5) and cooperates with the particle plate (3-2) to cut the mixed material into particles. The screening mechanism is used to screen out qualified and formed phase change particles from the discharged particles. The outer shell 2 (2-3) and outer shell 3 (3-1) are hollow cylindrical structures, and an openable baffle assembly (2-4) is provided between them. The baffle assembly (2-4) includes: a baffle cover (2-41), a hollow baffle shell (2-42), and a plurality of solid baffle pieces. The baffle cover (2-41) is a ring structure and has a plurality of slots (2-48) on its annular sidewall. The hollow baffle shell (2-42) and the solid baffle pieces are arranged in a fan-shaped structure between the rotating shaft (5) and the baffle cover (2-41). The outer diameter of the solid baffle pieces corresponds to the inner diameter of the outer shell 2 (2-3), and a pusher is provided on each solid baffle piece. Each pusher is movable in the corresponding slot (2-48). The hollow baffle shell (2-42) has an internal space for storing five solid baffle pieces. When the baffle assembly (2-4) is closed, the control pusher moves in the slot (2-48), thereby driving the corresponding solid baffle piece to move out of the internal space of the hollow baffle shell (2-42), and then they are arranged and spliced ​​in an interlaced manner to form a circular array around the rotating shaft (5), so that the channel between the outer shell 2 (2-3) and the outer shell 3 (3-1) is closed; When the baffle assembly (2-4) is opened, the control pusher moves in the slot, thereby driving the corresponding solid baffle piece to retract and overlap into the internal space of the hollow baffle shell (2-42), so that the channel between the outer shell two (2-3) and the outer shell three (3-1) is opened.

2. The apparatus as claimed in claim 1, characterized in that, The stirring cylinder further includes: a stirring rod (1-1), a top cover (1-2), and a cylinder body (1-4). The top cover (1-2) and the bottom cover (1-5) are respectively located at the top and bottom of the cylinder body (1-4) and are tightly fitted with the cylinder body (1-4) to form a stirring chamber. The perforated plate (1-6) is located below the bottom cover (1-5), and its top opening is tightly fitted with the bottom cover (1-5). Both the top cover (1-2) and the bottom cover (1-5) are composed of two semicircular plates joined together. Each semicircular plate has a handle welded to its outer perimeter on its upper surface. The top cover (1-2) has... After the two semicircular plates are joined together, a shaft hole is formed at the center, and a sealing element is provided at the junction of the lower surface of the plate and the cylinder (1-4). Similarly, the upper and lower surfaces of the two semicircular plates of the bottom cover (1-5) are also provided with corresponding sealing elements at the junctions of the cylinder (1-4) and the perforated plate (1-6), respectively. The main body of the stirring rod (1-1) is provided with a spiral fitting composed of multiple fins connected in series. The handle of the stirring rod (1-1) passes through the shaft hole of the top cover (1-2) and is connected to the top cover (1-2) by bearing. Heating wires (1-3) are arranged around the outer wall of the cylinder (1-4).

3. The apparatus as described in claim 1, characterized in that, The flared opening is directly opposite the porous disk (1-6) and is externally tangent to the porous disk (1-6), or the flared opening is directly opposite the porous disk (1-6) and the minimum length of the flared opening edge is greater than the outer diameter of the entire dissolving and stirring mechanism above.

4. The apparatus as claimed in claim 1, characterized in that, A guide plate (2-1) is also installed on the flared opening. The guide plate (2-1) is used to guide the skeleton support material into the flared opening.

5. The apparatus as claimed in claim 1, characterized in that, The second outer shell (2-3) includes two semi-cylindrical thin walls, with connecting plates (2-5) extending from both ends of the thin walls. The two semi-cylindrical thin walls are fixedly connected to the connecting plates (2-5) by bolts and then assembled to form the second outer shell (2-3).

6. The apparatus as claimed in claim 1, characterized in that, The particle plate (3-2) has a connecting hole in the middle, while other areas have through holes of the same diameter; the end of the rotating shaft (5) passes through the connecting hole.

7. The apparatus as claimed in claim 1, characterized in that, The cutting blade assembly includes an inner cutting blade (3-4) and an outer cutting blade (3-3), which are mounted on a rotating shaft (5) and rotate with the shaft and are located on both sides of the particle plate (3-2).

8. The apparatus as claimed in claim 1, characterized in that, The spiral assembly includes: spiral propulsion component one (5-1), spiral fin component (5-2), and spiral propulsion component two (5-3). Spiral propulsion component one (5-1) is located inside outer shell one (2-2), spiral fin component (5-2) is located inside outer shell two (2-3), and spiral propulsion component two (5-3) is located inside outer shell three (3-1).

9. A method for manufacturing phase-change particles using the high-temperature sizing phase change particle manufacturing apparatus according to any one of claims 1 to 8, characterized in that, include: Step 1: Weigh an appropriate amount of binder and mix it with a measured amount of deionized water. Pour the mixture into the stirring chamber of the dissolving and stirring mechanism. With the assistance of heating wires (1-3), heat the mixture to 70~80℃ until the binder solution becomes a transparent gel. Then, add the phase change material into the stirring chamber and continue heating and stirring until the phase change material is completely dissolved. Step 2: Weigh the skeleton support material and introduce it into the outer shell 1 (2-2) through the guide plate (2-1). At the same time, open the bottom cover (1-5) of the dissolving and stirring mechanism to allow the phase change material solution to flow into the outer shell 1 (2-2) through the porous disk (1-6). Start the rotating shaft (5) and use the spiral propulsion accessory 1 (5-1) to perform preliminary mixing and push it into the outer shell 2 (2-3). Step 3: Use the closed baffle assembly (2-4) to prevent the phase change material and the skeleton support material from entering the outer shell (3-1). Under the action of the spiral fin accessory (5-2), the two materials are uniformly mixed. At this time, start the next cycle of Step 1 operation. Step 4: The baffle assembly (2-4) moves from the closed state to the open state, initiating the next cycle of Step 2 operation; the premixed material, i.e., the material after preliminary mixing, enters the outer shell (2-3) under the push of the screw propulsion accessory one (5-1). At the same time, the material currently circulating and stirred in the outer shell (2-3) enters the outer shell (3-1) under the push of the premixed material and the cooperation of the screw propulsion accessory two (5-3) for extrusion; under the synergistic action of the screw propulsion accessory two (5-3), the particle plate (3-2), the inner cutter (3-4), and the outer cutter (3-3), the production of phase change particles is completed; when the material currently circulating and stirred has completely entered the outer shell (3-1), the state of the baffle assembly (2-4) changes from the open state to the closed state; Step 5: The cut phase change particles are screened through a screening mechanism and then placed in a hot air oven to evaporate the moisture inside the particles, while the screen is vibrated to prevent the particles from sticking together. Step 6: Place the phase change particles into a muffle furnace for sintering. Heat the particles to the sintering temperature at a predetermined heating rate and maintain the temperature for 1.5 to 3 hours. Then cool the particles down to room temperature to obtain the final shaped phase change particles.

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