Composite phase change material preparation system and its reaction kettle

Abstract

The utility model discloses a kind of composite phase change material preparation system and its reaction kettle, the reaction kettle includes: kettle body, including the outer layer shell being arranged at outside and the inner layer shell being arranged in outer layer shell with interval predetermined gap, for accommodating composite phase change material in inner layer shell, annular cavity is formed between outer layer shell and inner layer shell;First opening and second opening are provided on outer layer shell, first opening is located above second opening;Flow guide mechanism, flow guide mechanism is formed with the flow guide channel of intercommunication first opening and second opening between inner layer shell and outer layer shell, after fluid enters flow guide channel by first opening, it flows from top to bottom along height direction as a whole, and flows out by second opening.This application provides composite phase change material preparation system and its reaction kettle can effectively improve the uniformity and heat exchange rate of heat supply, and improve reliability when using, avoid the rupture of kettle body due to unexpected shutdown.

Description

Technical Field

[0001] This utility model relates to the technical field of composite phase change material preparation equipment, and in particular to a composite phase change material preparation system and its reaction vessel. Background Technology

[0002] Phase change thermal storage materials typically achieve low subcooling, low phase separation, and high thermal conductivity by doping with nucleating agents, thickeners, and thermal conductivity enhancers. The melt-stirring method is a conventional and effective approach for preparing composite phase change thermal storage materials. Since phase change thermal storage materials are solid at room temperature, they need to be heated to melt them and allow for the doping of various additives.

[0003] Currently, isothermal heating devices, such as isothermal reactors, are commonly used to heat phase change thermal storage materials. Therefore, isothermal heating devices are essential equipment for the preparation of composite phase change materials. However, current isothermal heating devices are difficult to optimally meet the needs of composite phase change materials.

[0004] Taking a typical constant-temperature heating device as an example, it may include a heating device, a stirring paddle, a water tank, a shell, an overflow port, pipes, a baffle plate, a motor, and a water pump. The water tank is fixed inside the shell, and a baffle plate is located at the bottom of the water tank. The baffle plate is connected to the output shaft of the motor at the bottom of the shell. The heating device is located between the shell and the bottom of the water tank, and a stirring paddle is located at the edge of the water tank, connected to the bottom of the baffle plate. The baffle plate stirs the water, promoting internal water bath movement and causing water layer convection, thereby maintaining a constant temperature. The stirring paddle ensures that the water temperature at the edge of the water tank is the same as the internal water temperature.

[0005] There are a number of problems with the constant temperature heating devices in related technologies that urgently need to be improved.

[0006] Existing constant-temperature heating devices are mainly propeller-type, crescent-type, and paddle-type, primarily designed for low-viscosity fluids. The preparation process of composite phase change materials involves three stages: solid particles, complete melting of the molten material and solid particles, and overall mixing. Traditional stirring paddles have poor overall mixing capabilities, failing to achieve effective mixing during the solid particle mixing stage. Furthermore, they cannot provide global intervention to the system after additives increase the viscosity of the molten liquid.

[0007] Existing constant-temperature heating devices only have a simple jacket, and the flow distribution of the heat exchange fluid in the jacket is uncontrollable, resulting in dead zones. In addition, some reactors use jacketed internal heaters, where the heat exchange medium circulates within the closed jacket under the action of buoyancy, and the heat exchange method is natural convection heat exchange, which may lead to local overheating.

[0008] Conventional heated reactors, designed for temperature control of the reaction system, typically employ bottom discharge. However, phase change materials (PCMs) are prone to solidification at room temperature or when in contact with interfaces below their phase change point. Bottom discharge can easily lead to blockage at the outlet due to PCM solidification. Rotary tilting discharge methods are suitable for PCM transfer scenarios. Water bath jackets with built-in heaters are unfavorable for moving or rotating reactors, hindering material transfer.

[0009] Therefore, it is necessary to propose a composite phase change material preparation system and its reaction vessel to solve at least one of the above problems.

[0010] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Utility Model Content

[0011] In view of the shortcomings of the existing technology, this utility model provides a composite phase change material preparation system and its reaction vessel, which can effectively improve the uniformity of heating and heat exchange rate, and improve the reliability during use, avoiding vessel rupture due to unexpected shutdown.

[0012] The specific technical solution of this utility model embodiment is as follows:

[0013] A reaction vessel for a composite phase change material preparation system, the reaction vessel of the composite phase change material preparation system comprising:

[0014] The vessel body includes an outer shell disposed on the outside and an inner shell disposed within the outer shell at a predetermined gap. The inner shell is used to accommodate a composite phase change material. An annular cavity is formed between the outer shell and the inner shell. The outer shell is provided with a first opening and a second opening, with the first opening located above the second opening.

[0015] A flow guiding mechanism is provided, in which a flow guiding channel is formed between the flow guiding mechanism, the inner shell, and the outer shell, connecting the first opening and the second opening. After the fluid enters the flow guiding channel through the first opening, it flows from top to bottom along the height direction and flows out through the second opening.

[0016] In a preferred embodiment, the flow guiding mechanism includes multiple baffles, which are spaced apart along the height direction in the annular cavity. The baffles are annular, with the inner side of the baffles in contact with the outer surface of the inner shell and the outer side of the baffles in contact with the inner surface of the outer shell. The baffles are provided with flow ports for fluid flow.

[0017] In a preferred embodiment, the flow ports of two adjacent baffles arranged in the height direction are staggered in the circumferential direction.

[0018] In a preferred embodiment, the flow ports of two adjacent baffles arranged in the height direction are spaced 180° apart in the circumferential direction.

[0019] In a preferred embodiment, two adjacent baffles arranged in the height direction are spaced 10mm-100mm apart.

[0020] In a preferred embodiment, the flow guiding mechanism includes a spiral baffle arranged along the height direction.

[0021] In a preferred embodiment, the flow guiding mechanism includes multiple perforated plates, which are spaced apart along the height direction in the annular cavity. The perforated plates are annular, with the inner side of the perforated plate in contact with the outer surface of the inner shell and the outer side of the perforated plate in contact with the inner surface of the outer shell. The perforated plates are provided with openings for fluid flow.

[0022] In a preferred embodiment, the aperture of the perforated plate gradually increases from top to bottom in the height direction.

[0023] In a preferred embodiment, the aperture of the perforated plate ranges from 0.5 mm to 5 mm.

[0024] In a preferred embodiment, both the first opening and the second opening are disposed on the side wall of the outer shell, the first opening is located at the uppermost part of the side wall of the outer shell, the second opening is located at the lowermost part of the side wall of the outer shell, and a bottom gap communicating with the second opening is formed between the bottom of the inner shell and the bottom of the outer shell.

[0025] A composite phase change material preparation system, comprising any of the above-described reaction vessels.

[0026] In a preferred embodiment, the composite phase change material preparation system further includes: a stirring paddle, a mixer for driving the stirring paddle, and a support for supporting the mixer, wherein the rotational speed of the mixer is adjustable.

[0027] In a preferred embodiment, the impeller has an overall frame structure, and the impeller includes a central shaft and blades disposed around the central shaft, the blades being in a mesh shape.

[0028] In a preferred embodiment, the height of the blade accounts for more than 80% of the height of the inner shell, and the gap between the edge of the blade and the inner surface of the inner shell is 10mm-20mm.

[0029] In a preferred embodiment, the composite phase change material preparation system further includes: a heating device, an outlet pipe and a return pipe, one end of the outlet pipe being connected to the outlet of the heating device and the other end being connected to the first opening; one end of the return pipe being connected to the second opening and the other end being connected to the return port of the heating device.

[0030] The technical solution of this utility model has the following significant beneficial effects:

[0031] The reactor of the composite phase change material preparation system provided in this application provides a flow guiding mechanism that forms a flow guiding channel with the inner shell and the outer shell, thereby guiding the heat transfer fluid, optimizing the flow path of the heat transfer fluid, increasing the contact time and contact area between the heat transfer fluid and the inner shell, so that the heat transfer fluid can heat the composite phase change material uniformly and efficiently, providing a stable temperature environment for the preparation of composite phase change materials, and avoiding flow dead zones or local overheating.

[0032] Furthermore, since the heat transfer fluid enters the flow channel through the first opening and flows downward along the height direction, and then flows out through the second opening, it can ensure that the phase change material in the upper part of the vessel is preferentially heated. This can prevent the lower fixed material from melting first. When the solid melts, its volume will expand (most materials increase in volume during solid-to-liquid phase change), while the upper part remains a hard solid, which will block the volume expansion of the lower molten material, causing the pressure inside the vessel to rise sharply, and ultimately causing the vessel to burst.

[0033] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, embodiments of the present invention include many changes, modifications, and equivalents. Features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. Attached Figure Description

[0034] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0035] Figure 1 This is a schematic diagram of the structure of a composite phase change material preparation system provided in the embodiments of this application;

[0036] Figure 2 This is a schematic diagram of the structure of a reaction vessel for a composite phase change material preparation system provided in the embodiments of this application;

[0037] Figure 3 This is a schematic diagram of a flow guiding mechanism in a reactor of a composite phase change material preparation system provided in this application embodiment;

[0038] Figure 4 This is a schematic diagram of the structure of a single baffle plate in a reactor of a composite phase change material preparation system provided in this application embodiment;

[0039] Figure 5 This is a schematic diagram showing the positions of two adjacent baffles in a reactor of a composite phase change material preparation system provided in this application embodiment.

[0040] Figure 6 This is a schematic diagram of another flow guiding mechanism in the reactor of a composite phase change material preparation system provided in the embodiments of this application;

[0041] Figure 7 This is a front view of another flow guiding mechanism in the reactor of a composite phase change material preparation system provided in this application embodiment;

[0042] Figure 8 This is a schematic diagram of the structure of the stirring paddle in the reactor of a composite phase change material preparation system provided in the embodiments of this application;

[0043] Figure 9 This is a schematic diagram of the structure of the stirring paddle in a composite phase change material preparation system provided in the embodiments of this application.

[0044] Reference numerals in the figures of this application:

[0045] 1. Reactor;

[0046] 11. Outer shell;

[0047] 111. The first opening;

[0048] 112. The second opening;

[0049] 12. Inner shell;

[0050] 13. Baffle plate;

[0051] 130. Outlet;

[0052] 14. Spiral baffle;

[0053] 2. Stirring paddle;

[0054] 20. Central axis;

[0055] 21. Paddle blades;

[0056] 3. Mixer;

[0057] 4. Support components;

[0058] 5. Discharge pipe;

[0059] 6. Return pipe;

[0060] 7. Fixture;

[0061] 8. Base;

[0062] 9. Heating equipment. Detailed Implementation

[0063] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate this utility model and are not intended to limit the scope of this utility model. After reading this utility model, any modifications of this utility model in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0064] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0065] 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 this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0066] The preparation of composite phase change materials requires careful consideration of the following three aspects:

[0067] Firstly, the uniformity of stirring: Traditional stirring paddles are suitable for low-viscosity fluids, but for composite phase change material systems containing thickeners, existing stirring paddles cannot achieve global stirring.

[0068] Secondly, the uniformity of heating and the heat exchange rate.

[0069] Thirdly, after an unexpected shutdown and restart, the phase change material expands in volume, which may cause irreversible deformation or even rupture of the container.

[0070] This invention provides a composite phase change material preparation system and its reaction vessel, which can effectively improve the uniformity of heating and the heat exchange rate, and improve the reliability during use, avoiding vessel rupture due to unexpected shutdown.

[0071] Please refer to the following for comprehensive information. Figures 1 to 9 This application specification provides a reactor 1 for a composite phase change material preparation system. The reactor 1 may include: a reactor body, the reactor body including an outer shell 11 disposed on the outside and an inner shell 12 disposed within the outer shell 11 at a predetermined gap, the inner shell 12 for accommodating the composite phase change material, and an annular cavity formed between the outer shell 11 and the inner shell 12; the outer shell 11 is provided with a first opening 111 and a second opening 112, the first opening 111 being located above the second opening 112; a flow guiding mechanism, the flow guiding mechanism forming a flow guiding channel connecting the first opening 111 and the second opening 112 between the inner shell 12 and the outer shell 11; after the fluid enters the flow guiding channel through the first opening 111, it flows downward along the height direction and flows out through the second opening 112.

[0072] In embodiments of this application, the reactor 1 of the composite phase change material preparation system may include a reactor body, which may be a double-layer structure, including an inner shell 12 and an outer shell 11. The inner shell 12 serves as a material chamber for accommodating the composite phase change material. The volume of the material chamber can be between 5L and 50L, and is not limited to the examples described above. It can be adapted to actual applications, and this application does not impose specific limitations on it.

[0073] An annular cavity is formed between the outer shell 11 and the inner shell 12. This annular cavity is used for the flow of a heat transfer fluid that heats the composite phase change material inside the inner shell 12. The heat transfer fluid can be water and / or heat transfer oil and / or other heat transfer fluids with a temperature within a predetermined range. This predetermined range can vary depending on the phase change temperature of the composite phase change material, and is not specifically limited herein.

[0074] The annular cavity is provided with a flow guiding mechanism. The outer shell 11 is provided with a first opening 111 and a second opening 112. The first opening 111 is located above the second opening 112. The heat transfer fluid flows into the annular cavity from the upper first opening 111, flows along the flow guiding mechanism to the lower second opening 112, and flows outward.

[0075] The inner side of the flow guiding mechanism is sealed to the outer surface of the inner shell 12, and the outer side of the flow guiding mechanism is sealed to the inner surface of the outer shell 11. This flow guiding mechanism, together with the inner shell 12 and the outer shell 11, forms a flow guiding channel, thereby guiding the heat transfer fluid, optimizing the flow path of the heat transfer fluid, increasing the contact time and contact area between the heat transfer fluid and the inner shell 12, enabling the heat transfer fluid to heat the composite phase change material uniformly and efficiently, providing a stable temperature environment for the preparation of the composite phase change material, and avoiding flow dead zones or localized overheating.

[0076] Furthermore, since the heat transfer fluid enters the flow channel through the first opening 111 and flows from top to bottom along the height direction, and flows out through the second opening 112, it can ensure that the phase change material in the upper part of the vessel is heated preferentially. This can prevent the lower fixed material from melting first. When the solid melts, its volume will expand (the volume of most materials increases when the solid → liquid phase change occurs), while the upper part is still a hard solid, which will block the volume expansion of the lower molten material, causing the pressure inside the vessel to rise sharply, and eventually causing the vessel to burst.

[0077] The structure of the aforementioned reactor 1 actually enables the reactor 1 to have the function of cold start-up. The upper composite material melts before the bottom. The molten and expanded material can push upward to release the local pressure caused by the phase change, thus avoiding deformation or even cracking inside the reactor 1.

[0078] Depending on the form of the high-flow-conductivity mechanism, the reactor 1 can have various implementations. These will be described in detail below with reference to the accompanying drawings.

[0079] Please refer to the following: Figure 2 , Figure 3 , Figure 4 and Figure 5In one embodiment, the flow guiding mechanism may include multiple baffles 13, which are spaced apart along the height direction in the annular cavity. The baffles 13 are annular in shape, with their inner sides contacting the outer surface of the inner shell 12 and their outer sides contacting the inner surface of the outer shell 11. Each baffle 13 has a flow port 130 for fluid flow. The surface of the baffle 13 is perpendicular to the axial direction of the reactor 1, and the flow port 130 can specifically be a notch or opening formed circumferentially.

[0080] In this embodiment, the flow guiding structure may include multiple baffles 13, which divide the annular cavity into multiple vertically connected subspaces, forcing the fluid to flow through the flow port 130 of the baffle 13, further extending the fluid path and increasing the heat exchange time between the heat transfer fluid and the inner shell 12.

[0081] like Figure 4 As shown, the annular baffle 13 covers the entire annular cross-section, preventing the fluid from forming dead zones (i.e., no-flow areas) in the circumference and ensuring uniform circumferential heat transfer. In addition, the baffle 13 itself can enhance the strength of the shell structure and reduce the deformation of the double-layer shell caused by the pressure difference.

[0082] Furthermore, the flow ports 130 of the two adjacent baffles 13 in the height direction are staggered in the circumferential direction.

[0083] In this embodiment, the staggered arrangement of the two adjacent flow ports 130 forces the heat transfer fluid to continuously change direction during the flow process (such as flowing from the left side of the upper flow port 130 to the right side of the lower flow port 130), enhancing the degree of fluid turbulence; under turbulent conditions, the fluid boundary layer becomes thinner, and the heat exchange efficiency is significantly improved, thereby better solving the problem of low heat transfer efficiency under laminar flow conditions; in addition, it can also avoid local heat transfer insufficiency caused by fluid flowing along a fixed circumferential path, further optimizing the circumferential temperature uniformity of the vessel.

[0084] Specifically, the flow ports 130 of two adjacent baffles 13 in the height direction are arranged at a circumferential interval of 180°. That is, the flow ports 130 of two adjacent baffles 13 face opposite directions, ensuring that the heat exchange medium is evenly distributed and converged to the next flow port 130 after passing through the flow port 130.

[0085] Overall, the 180° interval represents the maximum degree of misalignment, causing a drastic change in the direction of fluid flow (such as from left to right to right to left), maximizing turbulence intensity, and achieving the highest heat exchange efficiency. The fluid forms a zigzag flow within the annular cavity, further increasing the path length and covering more areas, avoiding any dead zones in heat transfer around the circumference.

[0086] like Figure 3 As shown, the two baffles 13 arranged adjacent to each other in the height direction are spaced h apart between 10mm and 100mm.

[0087] If the gap h between two adjacent baffles 13 is too small, for example, less than 10 mm, it will cause excessive resistance to the heat transfer fluid and increase power consumption; if the gap h is too large, for example, greater than or equal to 100 mm, the fluid is prone to laminar flow between the two baffles 13, which will reduce the heat transfer efficiency.

[0088] When the distance h between two adjacent baffles 13 in the height direction is in the range of 10mm-100mm, the flow resistance and heat transfer efficiency are balanced, which can adapt to heat transfer fluids of different viscosities (such as low viscosity water or high viscosity heat transfer oil), ensuring stable fluid flow and sufficient heat transfer.

[0089] Experimental results show that by setting baffle 13, the uniformity of flow velocity distribution in the interlayer can be improved by more than 50%, and the wall temperature difference can be reduced to within ±2℃.

[0090] Please refer to the following: Figure 6 and Figure 7 In another embodiment, the flow guiding mechanism includes a spiral baffle 14 arranged along the height direction.

[0091] In this embodiment, the flow guiding mechanism can be a spiral structure composed of spiral baffles 14, which is used to guide the heat transfer fluid to flow from top to bottom along the spiral path. The flow path length is significantly increased, and the heat exchange time is greatly extended. The spiral flow allows the fluid to move simultaneously in the circumferential and axial directions, making full contact with the inner shell 12 and avoiding local temperature differences. The fluid flow is more continuous, the pressure loss is smaller, and the power consumption is lower, which can further ensure the flow.

[0092] In another embodiment, the flow guiding mechanism includes multiple perforated plates, which are spaced apart along the height direction in the annular cavity. The perforated plates are annular, with the inner side of the perforated plates in contact with the outer surface of the inner shell 12 and the outer side of the perforated plates in contact with the inner surface of the outer shell 11. The perforated plates are provided with openings for fluid flow.

[0093] In this embodiment, the flow guiding mechanism may include multiple perforated plates. The surface of the perforated plate may be perpendicular to the axis of the vessel body. Multiple openings are formed on the perforated plate, which disperses the fluid into multiple fine streams, increasing the contact area between the fluid and the inner shell 12. When the fluid passes through the openings, a throttling effect occurs, increasing the flow velocity, enhancing turbulence, and improving heat transfer efficiency. The perforated plate has a more significant effect on fluid distribution, avoiding localized flow concentration caused by the inlet location and ensuring uniform heat transfer across the entire cross-section.

[0094] In the height direction, the aperture of the perforated plate gradually increases from top to bottom.

[0095] When the fluid flows from top to bottom, due to changes in gravity and resistance, the fluid pressure at the bottom is slightly higher than at the top. The gradually increasing orifice diameter can balance the flow resistance at the top and bottom, avoiding insufficient flow at the bottom. In addition, it can ensure uniform fluid flow distribution across the entire height range, solve the problem of temperature difference between the top and bottom caused by excessive flow at the top and insufficient flow at the bottom, and further optimize the uniformity of axial heat transfer.

[0096] The aperture of the perforated plate ranges from 0.5mm to 5mm.

[0097] If the pore size is too small (<0.5mm), it is prone to clogging and the resistance is too high; if the pore size is too large (>5mm), the fluid dispersion effect is poor and the turbulence is weakened. When the pore size of the porous plate is in the range of 0.5mm-5mm, it can be adapted to the heat transfer fluids commonly used in the preparation of composite phase change materials, which can ensure that the fluid is fully dispersed and avoid clogging and excessive power consumption.

[0098] In this embodiment, the outer shell 11 can be integrally cylindrical, and the inner shell 12 can be integrally cylindrical. The upper end of the inner shell 12 can be flush with the upper end of the outer shell 11, and the two are sealed by an annular top wall. The lower end of the inner shell 12 has an inner bottom wall, and the lower end of the outer shell 11 has an outer bottom wall. The inner bottom wall and the outer bottom wall are spaced apart to form a bottom gap.

[0099] In this embodiment, both the first opening 111 and the second opening 112 are located on the side wall of the outer shell 11. The first opening 111 is located at the uppermost part of the side wall of the outer shell 11, and the second opening 112 is located at the lowermost part of the side wall of the outer shell 11. A bottom gap communicating with the second opening 112 is formed between the bottom of the inner shell 12 and the bottom of the outer shell 11. In this embodiment, by placing the liquid inlet at the uppermost part and the liquid outlet at the lowermost part, it is ensured that the fluid can fill the entire annular cavity (including the top area), avoiding the heat transfer blind zone caused by the top not being filled with fluid. The bottom gap allows the fluid to flow fully through the bottom of the vessel, solving the problem of air accumulation or insufficient fluid flow at the bottom in traditional structures, and ensuring the temperature stability of the bottom of the vessel (the area where phase change materials are easily deposited).

[0100] This application also provides a composite phase change material preparation system, which mainly includes the above-mentioned reaction vessel 1. By setting the reaction vessel 1, the composite phase change material preparation system can achieve the technical effects achieved by the embodiment of the reaction vessel 1. For details, please refer to the specific description of the above embodiment, which will not be repeated here.

[0101] Please refer to the following: Figure 1 , Figure 8 and Figure 9 In one embodiment, the composite phase change material preparation system further includes: a stirring paddle 2, a mixer 3 for driving the stirring paddle 2, and a support member 4 for supporting the mixer 3, wherein the rotational speed of the mixer 3 is adjustable.

[0102] In this embodiment, the stirring paddle 2 is used to extend into the reaction vessel 1 to stir the composite phase change material, thereby avoiding local uneven concentration of the phase change material, making the material mix more uniform, and thus avoiding incomplete reaction due to component stratification.

[0103] The mixer 3 can be mounted above the reactor 1 via the support 4. The speed of the mixer 3 is adjustable, meaning it has a speed-adjustable function. This allows it to adapt to solid particles and materials of different viscosities, as well as different preparation stages (e.g., high speed for initial mixing and low speed for later reactions), flexibly controlling the stirring intensity and reducing structural damage to the material caused by excessive shearing. Specifically, the speed can range from 1 rpm to 200 rpm.

[0104] The support 4 is used to install the mixer 3 and the stirring paddle 2. The support 4 may have a telescopic function, for example, it may be assembled from telescopic rods. The support 4 can be used to adjust the height of the stirring paddle 2. When stirring is required, the stirring paddle 2 can be inserted into the reactor 1. After stirring is completed, it can be automatically lifted up and separated from the reactor 1, thereby improving the automation level of the entire composite phase change material preparation system.

[0105] The composite phase change material preparation system may also include a base 8 and a fixture 7 disposed on the base 8. The reactor 1 may also be mounted on the base 8 and limited by the fixture 7 to ensure that the reactor 1 remains in a fixed position during use.

[0106] In one embodiment, the stirring paddle 2 has an overall frame structure, and the stirring paddle 2 includes: a central shaft 20 and blades 21 disposed around the central shaft 20, the blades 21 being in a mesh shape.

[0107] In this embodiment, the stirring paddle 2 adopts a frame structure, which has high strength and can adapt to the stirring requirements of high-viscosity phase change materials, avoiding deformation of the paddle blades 21. Among them, the grid-shaped paddle blades 21 can reduce stirring resistance and energy consumption compared with solid paddle blades 21. At the same time, the gaps between the grids allow materials to pass through, achieving penetrating stirring and more uniform mixing. In addition, the structure of the central shaft 20 and the outer paddle blades 21 covers the radial range of the vessel body, avoiding mixing differences between the center and the edge.

[0108] The impeller 2 can be connected to the mixing shaft of the mixer 3 via positioning bolts, supporting quick disassembly and maintenance. The impeller blade 21 can be made of carbon steel, stainless steel, fluoroplastics, or other materials that can be flexibly matched with different preparation materials.

[0109] like Figure 8 As shown, in one specific embodiment, the height of the blade 21 accounts for more than 80% of the height of the inner shell 12, and the gap between the edge of the blade 21 and the inner surface of the inner shell 12 is 10mm-20mm.

[0110] In this embodiment, the high-percentage blades 21 cover most of the height of the vessel, solving the problem that traditional short blades 21 cannot stir the upper or lower materials, and ensuring that the materials are mixed evenly throughout the entire height range.

[0111] The edge of the blade 21 forms a gap of 10mm-20mm from the inner surface of the inner shell 12, which can not only avoid friction between the blade 21 and the shell, but also reduce the unstirred area at the edge (where phase change materials tend to accumulate), ensuring that the materials near the vessel wall can also be fully mixed.

[0112] In one embodiment, the composite phase change material preparation system may further include: a heating device 9, an outlet pipe 5, and a return pipe 6. One end of the outlet pipe 5 is connected to the outlet of the heating device 9, and the other end is connected to the first opening 111. One end of the return pipe 6 is connected to the second opening 112, and the other end is connected to the return port of the heating device 9.

[0113] In this embodiment, the composite phase change material preparation system may also include a heating device 9, which is used to provide heat transfer fluid. The heating device 9 can form a closed loop system with the reactor 1 through the liquid outlet pipe 5 and the return pipe 6, so that the heat transfer fluid can be reused and resource consumption can be reduced.

[0114] Among them, the liquid outlet pipe 5 and the return pipe 6 can be made of flexible hoses, which facilitates the movement and rotation of the reaction vessel 1.

[0115] The heating device 9 can be equipped with temperature and flow sensors to precisely control the temperature and flow rate of the heat transfer fluid, with a temperature control accuracy of ±1℃. Combined with the real-time adjustment of the heat transfer intensity of the reactor 1 through the circulation pipeline, dynamic control of the preparation temperature can be achieved. In addition, the circulation pipeline makes the flow of the heat transfer fluid more stable, avoiding temperature fluctuations in the reactor body caused by fluctuations in fluid supply, and improving the stability of the preparation process.

[0116] It should be noted that in the description of this application, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more.

[0117] The various embodiments described in this specification are presented in a progressive manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0118] The above are merely a few embodiments of this utility model. Although the embodiments disclosed in this utility model are as described above, the content is only for the purpose of facilitating understanding of this utility model and is not intended to limit this utility model. Any person skilled in the art to which this utility model pertains may make any modifications and changes in the form and details of the embodiments without departing from the spirit and scope disclosed in this utility model. However, the patent protection scope of this utility model shall still be determined by the scope defined in the appended claims.

Claims

1. A reaction vessel for a composite phase change material preparation system, characterized in that, The reaction vessel of the composite phase change material preparation system includes: The vessel body includes an outer shell disposed on the outside and an inner shell disposed within the outer shell at a predetermined gap. The inner shell is used to accommodate a composite phase change material. An annular cavity is formed between the outer shell and the inner shell. The outer shell is provided with a first opening and a second opening, with the first opening located above the second opening. A flow guiding mechanism is provided, in which a flow guiding channel is formed between the flow guiding mechanism, the inner shell, and the outer shell, connecting the first opening and the second opening. After the fluid enters the flow guiding channel through the first opening, it flows from top to bottom along the height direction and flows out through the second opening.

2. The reaction vessel of the composite phase change material preparation system as described in claim 1, characterized in that, The flow guiding mechanism includes multiple baffles, which are spaced apart along the height direction in the annular cavity. The baffles are annular, with the inner side of the baffles in contact with the outer surface of the inner shell and the outer side of the baffles in contact with the inner surface of the outer shell. The baffles are provided with flow ports for the flow of fluid.

3. The reactor of the composite phase change material preparation system as described in claim 2, characterized in that, The flow ports of two adjacent baffles in the height direction are staggered in the circumferential direction.

4. The reaction vessel of the composite phase change material preparation system as described in claim 3, characterized in that, The flow ports of two adjacent baffles in the height direction are arranged at 180° intervals in the circumferential direction.

5. The reaction vessel of the composite phase change material preparation system as described in claim 2, characterized in that, The two baffles arranged adjacent to each other in the vertical direction are spaced 10mm-100mm apart.

6. The reaction vessel of the composite phase change material preparation system as described in claim 1, characterized in that, The flow guiding mechanism includes a spiral baffle plate arranged along the height direction.

7. The reactor of the composite phase change material preparation system as described in claim 1, characterized in that, The flow guiding mechanism includes multiple perforated plates, which are spaced apart along the height direction in the annular cavity. The perforated plates are annular, with the inner side of the perforated plate in contact with the outer surface of the inner shell and the outer side of the perforated plate in contact with the inner surface of the outer shell. The perforated plates are provided with openings for fluid flow.

8. The reaction vessel of the composite phase change material preparation system as described in claim 7, characterized in that, In the vertical direction, the aperture of the perforated plate gradually increases from top to bottom.

9. The reaction vessel of the composite phase change material preparation system as described in claim 8, characterized in that, The aperture of the perforated plate ranges from 0.5mm to 5mm.

10. The reaction vessel of the composite phase change material preparation system as described in claim 2, characterized in that, Both the first opening and the second opening are located on the side wall of the outer shell. The first opening is located at the uppermost part of the side wall of the outer shell, and the second opening is located at the lowermost part of the side wall of the outer shell. A bottom gap communicating with the second opening is formed between the bottom of the inner shell and the bottom of the outer shell.

11. A composite phase change material preparation system, characterized in that, Includes the reaction vessel as described in any one of claims 1 to 10.

12. The composite phase change material preparation system as described in claim 11, characterized in that, The composite phase change material preparation system further includes: a stirring paddle, a mixer for driving the stirring paddle, and a support for supporting the mixer, wherein the rotation speed of the mixer is adjustable.

13. The composite phase change material preparation system as described in claim 12, characterized in that, The stirring paddle has an overall frame structure and includes a central shaft and blades arranged around the central shaft, the blades being in a grid pattern.

14. The composite phase change material preparation system as described in claim 13, characterized in that, The height of the blade accounts for more than 80% of the height of the inner shell, and the gap between the edge of the blade and the inner surface of the inner shell is 10mm-20mm.

15. The composite phase change material preparation system as described in claim 11, characterized in that, The composite phase change material preparation system further includes: a heating device, a liquid outlet pipe and a return pipe, one end of the liquid outlet pipe being connected to the outlet of the heating device and the other end being connected to the first opening; one end of the return pipe being connected to the second opening and the other end being connected to the return port of the heating device.

Images