A spray drying tower with a cyclone breaking device

Abstract

The utility model relates to a kind of spray drying tower with cyclone crushing device, belong to spray drying equipment technical field.The spray drying tower includes tower body, crushing device and cyclone device;The tower body is hollow inside, the crushing device is by driving assembly and multiple crushing components, the crushing component is set in the tower body, the crushing component includes shaft and blade group;The cyclone device includes deflector, the deflector is set on the inner wall of the tower body, and is communicated with air pipe by the air passage on the tower body. Through the synergistic effect of "mechanical shearing+airflow cyclone", the shell is broken in the particle semi-solidification stage, the internal solvent is released, the solidness is improved, so that the solid particle proportion reaches more than 85%.

Description

Technical Field

[0001] This utility model relates to the technical field of spray drying equipment, and in particular to a spray drying tower with a cyclone crushing device. Background Technology

[0002] Composite sodium iron phosphate (Na4Fe3(PO4)2(P2O7)) is a novel battery cathode material with advantages such as high energy density, long cycle life and environmental friendliness, and is widely used in electric vehicles and energy storage systems.

[0003] The preparation method of composite sodium iron phosphate mainly includes steps such as raw material proportioning, raw material grinding, spray drying, sintering, and carbon-based material coating. During the spray drying process, solid particles are prepared using a spray drying tower; however, due to incomplete crushing, the proportion of solid particles is relatively low, only maintaining 60%-70%. During high-temperature sintering of hollow particles, the internal cavities easily expand into cracks, resulting in a tap density reduction of more than 30%. Utility Model Content

[0004] Based on the above analysis, the present invention aims to provide a spray drying tower with a cyclone crushing device to solve the problems of incomplete crushing and low proportion of solid particles in existing spray drying towers.

[0005] On the one hand, this utility model provides a spray drying tower with a cyclone crushing device, including a tower body, a crushing device and a cyclone device;

[0006] The tower body is hollow inside. The crushing device consists of a drive assembly and multiple sets of crushing assemblies. The crushing assemblies are arranged inside the tower body and include a rotating shaft and a set of blades.

[0007] The swirl device includes a guide plate, which is disposed on the inner wall of the tower body and connected to the air pipe through the air passage on the tower body.

[0008] Furthermore, the tower body includes a tower body section and a flow guide section; the tower body section is cylindrical, and the flow guide section is frustoconical; the flow guide section is integrally formed with the tower body section, and the flow guide section is located below the tower body section, with a discharge port provided at the end of the flow guide section away from the tower body section.

[0009] Furthermore, the drive assembly includes a motor and a connecting rod connected to the motor. The connecting rod overlaps the upper end of the tower body and is perpendicular to the axis of the tower body. The center of the connecting rod coincides with the axis of the tower body, and a crushing component is connected to the connecting rod.

[0010] Furthermore, the crushing assembly consists of a rotating shaft and a blade assembly. The rotating shaft is connected to the connecting rod and is evenly distributed along the length of the connecting rod. A blade assembly is rotatably connected to the end of the rotating shaft away from the connecting rod. The blade assembly consists of multiple sets of blades, which rotate along the axis of the rotating shaft.

[0011] Furthermore, the number of the crushing components is 3 sets, and the blade set includes 3 sets of blades.

[0012] Furthermore, the distance between the ends of adjacent blades, the distance between the blade ends and the inner wall of the tower body is ≥50mm, and the distance between the blade assembly and the discharge port on the tower body is 200-300mm.

[0013] Furthermore, the guide plate includes an inner chamber, a guide pipe, and an injection hole; the guide pipe, the inner chamber, and the injection hole are all connected, and the guide pipe is inserted into the air passage of the tower body.

[0014] Furthermore, the guide plates are evenly arranged along the axis of the tower body, and the number of guide plates is 4.

[0015] Furthermore, the number of injection holes is multiple, and they are evenly arranged.

[0016] Furthermore, the direction of the jetting of the jet hole axis is opposite to that of the tower body, and the angle between the tangent at the intersection point of the tower body and the jet hole axis is 20-40°.

[0017] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0018] 1. In this utility model, the spray drying tower includes a tower body, a crushing device, and a cyclone device; both the crushing device and the cyclone device are installed inside the tower body. The crushing device achieves mechanical shearing, and the cyclone device achieves gas circulation. Through the synergistic effect of "mechanical shearing + airflow cyclone", the outer shell is crushed during the semi-solidification stage of the particles, releasing the internal solvent and increasing the solidity, so that the proportion of solid particles reaches more than 85%;

[0019] 2. The tower body includes a tower body section and a guide section; the tower body section is cylindrical, and the guide section is frustoconical; the guide section is integrally formed with the tower body section, and the guide section is located below the tower body section. A discharge port is provided at the end of the guide section away from the tower body section. Particles that have undergone multiple crushing processes by the crushing device and the cyclone device have a high degree of solidity and are discharged from the discharge port along the guide section after crushing.

[0020] 3. The guide plate includes an inner chamber, a guide pipe, and injection holes; the guide pipe, the inner chamber, and the injection holes are all connected. Gas enters the inner chamber from the gas pipe along the guide pipe, and after being uniformly stabilized in the inner chamber, it is blown into the tower body through the injection holes. The weight of solid particles is greater than the buoyancy, so they are discharged from the discharge port. Hollow particles are blown up by the cyclone device, then crushed by the crushing device, and then reformed into new particles. This cycle is repeated continuously to improve the solidity and increase the proportion of solid particles.

[0021] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the description and accompanying drawings, which are particularly pointed out. Attached Figure Description

[0022] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0023] Figure 1 A schematic diagram of the tower body, crushing device, and cyclone device assembly;

[0024] Figure 2 This is a schematic diagram of the overall structure of the spray drying tower;

[0025] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0026] Figure 4 Formal projection view of the spray drying tower;

[0027] Figure 5 This is a schematic diagram of the guide plate structure in a cyclone device;

[0028] Figure label:

[0029] 1. Tower body; 11. Tower section; 12. Guide section; 13. Discharge port; 14. Air duct; 2. Crushing device; 21. Motor; 22. Connecting rod; 23. Rotating shaft; 24. Blade assembly; 25. Blade; 3. Swirl device; 31. Guide plate; 311. Guide pipe; 312. Inner chamber; 313. Injection hole. Detailed Implementation

[0030] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0031] Composite sodium iron phosphate (Na4Fe3(PO4)2(P2O7)) is a novel battery cathode material with advantages such as high energy density, long cycle life and environmental friendliness, and is widely used in electric vehicles and energy storage systems.

[0032] The preparation method of composite sodium iron phosphate mainly includes steps such as raw material proportioning, raw material grinding, spray drying, sintering, and carbon-based material coating. During the spray drying process, solid particles are prepared using a spray drying tower; however, due to incomplete crushing, the proportion of solid particles is relatively low, only maintaining 60%-70%. During high-temperature sintering of hollow particles, the internal cavities easily expand into cracks, resulting in a tap density reduction of more than 30%.

[0033] Therefore, this utility model provides a spray drying tower with a cyclone crushing device 2, the spray drying tower including a tower body 1, a crushing device 2 and a cyclone device 3;

[0034] The tower body 1 is hollow inside. The crushing device 2 consists of a drive assembly and multiple sets of crushing assemblies. The crushing assemblies are arranged inside the tower body 1 and include a rotating shaft 23 and a blade assembly 24.

[0035] The swirling device 3 includes a guide plate 31, which is disposed on the inner wall of the tower body 1 and is connected to the air pipe through the air passage 14 on the tower body 1.

[0036] Compared with the prior art, in this utility model, the spray drying tower includes a tower body 1, a crushing device 2, and a cyclone device 3; both the crushing device 2 and the cyclone device 3 are installed inside the tower body 1. The crushing device 2 achieves mechanical shearing, and the cyclone device 3 achieves gas circulation. Through the synergistic effect of "mechanical shearing + airflow cyclone", the outer shell is crushed during the semi-solidification stage of the particles, releasing the internal solvent and increasing the solidity, so that the proportion of solid particles reaches more than 85%.

[0037] Specifically, the tower body 1 includes a tower body section 11 and a flow guide section 12; the tower body section 11 is cylindrical and the flow guide section 12 is frustoconical; the flow guide section 12 is integrally formed with the tower body section 11 and is located below the tower body section 11, with a discharge port 13 provided at the end of the flow guide section 12 away from the tower body section 11.

[0038] It should be noted that the tower body 1 includes a tower body section 11 and a guide section 12; the tower body section 11 is cylindrical, and the guide section 12 is frustoconical; the guide section 12 is integrally formed with the tower body section 11, and the guide section 12 is located below the tower body section 11. A discharge port 13 is provided at the end of the guide section 12 away from the tower body section 11. The particles, after being crushed multiple times by the crushing device 2 and the cyclone device 3, have a high degree of solidity and are discharged from the discharge port 13 along the guide section 12.

[0039] Specifically, the drive assembly includes a motor 21 and a connecting rod 22 connected to the motor 21. The connecting rod 22 overlaps the upper end of the tower body 1 and is perpendicular to the axis of the tower body 1. The center of the connecting rod 22 coincides with the axis of the tower body 1. A crushing component is connected to the connecting rod 22.

[0040] It should be noted that in this invention, the motor 21 is the power source, providing power to the crushing assembly. The motor 21 can be fixed to the outer wall of the tower body 1 with bolts, or it can be fixed in other ways, such as using a mounting bracket. Connected to the motor 21 is a connecting rod 22, which is fixed to the upper end of the tower body 1. The connecting rod 22 is perpendicular to the axis of the tower body 1, and its center coincides with the axis of the tower body 1. The function of the connecting rod 22 is to fix the crushing assembly and, as an actuating component, provide driving force to the crushing assembly.

[0041] The center of connecting rod 22 coincides with the axis of tower body 1, ensuring operational balance and reducing vibration. Utilizing tower body 1 as the core support results in a compact and reliable structure. Motor 21 directly converts the rotational motion into a wide-range crushing action of the crushing components via connecting rod 22.

[0042] Specifically, the crushing assembly consists of a rotating shaft 23 and a blade assembly 24. The rotating shaft 23 is connected to the connecting rod 22 and is evenly distributed along the length of the connecting rod 22. The blade assembly 24 is rotatably connected to the end of the rotating shaft 23 away from the connecting rod 22. The blade assembly 24 consists of multiple sets of blades 25, which rotate along the axis of the rotating shaft 23.

[0043] Specifically, the number of the crushing components is 3 sets, and the blade group 24 includes 3 sets of blades 25.

[0044] It should be noted that the function of the crushing component is to crush hollow particles using rotating blades 25. Therefore, the crushing component consists of a rotating shaft 23 and blade sets 24. The rotating shaft 23 is connected to the connecting rod 22 of the drive component. There are multiple rotating shafts 23, preferably three, evenly arranged along the length of the connecting rod 22 and perpendicular to each other. Blade sets 24 are fixedly connected to the lower end of each rotating shaft 23. Each blade set 24 contains two blades 25, for a total of three sets.

[0045] It should be noted that in this utility model, the motor 21, the connecting rod 22 and the rotating shaft 23 can drive each other through a transmission device. The transmission device can adopt an existing structure, such as a gear or chain structure, which is not shown in the figure of this utility model.

[0046] Movement process:

[0047] The motor 21 is started, and the transmission device drives the rotating shaft 23 to rotate along its own axis, which in turn drives the blade 25 to rotate, thereby crushing the hollow particles.

[0048] Specifically, the distance between the ends of adjacent blades 25 and between the end of blade 25 and the inner wall of tower body 1 is ≥50mm, and the distance between blade group 24 and the discharge port 13 on tower body 1 is 200-300mm.

[0049] It should be noted that a spacing of ≥50mm ensures that there will be no collision, scratching, or interference between the blades 25 and between the blades 25 and the inner wall of the tower body 1 during high-speed rotation. This is the most basic and important guarantee for the safe operation of the equipment, effectively preventing equipment downtime or even component damage due to friction or jamming. Setting the distance between the blade assembly 24 and the discharge port 13 to 200-300mm is equivalent to maintaining a sufficient crushing buffer above the discharge port 13, ensuring that hollow particles are completely crushed, thereby improving the overall crushing efficiency and solidity.

[0050] Specifically, the guide plate 31 includes an inner chamber 312, a guide pipe 311, and a spray hole 313; the guide pipe 311, the inner chamber 312, and the spray hole 313 are all connected, and the guide pipe 311 is inserted into the air passage 14 of the tower body 1.

[0051] It should be noted that the guide plate 31 includes an inner chamber 312, a guide pipe 311, and an injection hole 313; the guide pipe 311, the inner chamber 312, and the injection hole 313 are all connected. Gas enters the inner chamber 312 from the gas pipe along the guide pipe 311, and after the gas is uniformly stabilized in the inner chamber 312, it is blown into the tower body 1 through the injection hole 313. The weight of solid particles is greater than the buoyancy, so they are discharged from the discharge port. Hollow particles are blown up by the cyclone device 3, then crushed by the crushing device 2, and then reformed into new particles. This cycle is repeated continuously to improve the solidity and increase the proportion of solid particles.

[0052] Specifically, the guide plates 31 are evenly arranged along the axis of the tower body 1, and there are 4 guide plates 31.

[0053] Specifically, there are multiple injection holes 313, evenly arranged. The direction of the injection of the axis of the injection hole 313 is opposite to that of the tower body 1, and the angle between the tangent at the intersection point of the tower body 1 and the axis of the injection hole 313 is 20-40°.

[0054] It should be noted that the four guide vanes 31 are evenly distributed on the inner wall of the tower body 1 at 90-degree intervals. This symmetrical arrangement ensures that the ejected airflow is uniform in intensity, forming a stable and symmetrical rotating flow field, avoiding turbulence or dead zones, and ensuring reliable sorting results.

[0055] Multiple evenly distributed injection holes 313 ensure that the airflow is not ejected as a concentrated stream, but rather forms a uniform air curtain. This increases the contact area between the airflow and the particles, improving sorting efficiency and accuracy.

[0056] To more clearly describe this utility model, the following embodiments and comparative examples are provided for further illustration.

[0057] Example 1

[0058] Reference Figure 1-5 Assembly of the spray drying tower:

[0059] The spray drying tower includes a tower body 1, a crushing device 2, and a cyclone device 3;

[0060] The tower body 1 is hollow inside, and includes a tower body section 11 and a flow guide section 12; the tower body section 11 is cylindrical, and the flow guide section 12 is frustoconical; the flow guide section 12 is integrally formed with the tower body section 11, and the flow guide section 12 is located below the tower body section 11, and a discharge port 13 is provided at the end of the flow guide section 12 away from the tower body section 11;

[0061] The crushing device 2 consists of a drive assembly and multiple sets of crushing assemblies. The crushing assemblies are arranged inside the tower body 1 and include a rotating shaft 23 and a blade assembly 24.

[0062] The drive assembly includes a motor 21 and a connecting rod 22 connected to the motor 21. The connecting rod 22 overlaps the upper end of the tower body 1 and is perpendicular to the axis of the tower body 1. The center of the connecting rod 22 coincides with the axis of the tower body 1. A crushing component is connected to the connecting rod 22. The crushing component consists of a rotating shaft 23 and a blade assembly 24. The rotating shaft 23 is connected to the connecting rod 22 and is evenly distributed along the length of the connecting rod 22. The blade assembly 24 is rotatably connected to the end of the rotating shaft 23 away from the connecting rod 22. The blade assembly 24 consists of multiple sets of blades 25, which rotate along the axis of the rotating shaft 23. The number of crushing components is 3 sets, and the number of blade assemblies 24 is 3 sets of blades 25. The distance between the ends of adjacent blades 25 and between the ends of blades 25 and the inner wall of the tower body 1 is ≥50mm. The distance between the blade assembly 24 and the discharge port 13 on the tower body 1 is 200-300mm.

[0063] The swirling device 3 includes a guide plate 31, which is disposed on the inner wall of the tower body 1 and communicates with an air pipe (not shown in the figure) through an air passage 14 on the tower body 1. The guide plate 31 includes an inner chamber 312, a guide pipe 311, and a jet hole 313. The guide pipe 311, the inner chamber 312, and the jet hole 313 are all connected, and the guide pipe 311 is inserted into the air passage 14 of the tower body 1. The guide plates 31 are evenly arranged along the axis of the tower body 1, and there are four guide plates 31. There are multiple jet holes 313, which are evenly arranged. The jetting direction of the axis of the jet hole 313 intersects the tower body 1 in the opposite direction, and the angle between the tangent at the intersection point of the tower body 1 and the axis of the jet hole 313 is 30°.

[0064] The operation process of the spray drying tower:

[0065] Start the motor 21, which provides power and drives the rotating shaft 23 to rotate along its own axis through the transmission device (not shown in the figure), thereby driving the blade 25 to rotate and realize the crushing of hollow particles.

[0066] Gas enters the inner chamber 312 from the gas pipe along the guide pipe 311. After the gas is uniformly stabilized in the inner chamber 312, it is blown into the tower body 1 through the injection hole 313. The weight of solid particles is greater than the buoyancy, so they are discharged from the discharge port. Hollow particles are blown up by the cyclone device 3, then crushed by the crushing device 2, and then reformed into new particles. This cycle is repeated continuously to improve the solidity and increase the proportion of solid particles.

[0067] This invention utilizes the synergistic effect of "mechanical shearing + airflow swirl" to break the outer shell during the semi-solidification stage of the particles, release the internal solvent, and increase the solidity, so that the proportion of solid particles reaches more than 85%.

[0068] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A spray drying tower with a cyclone breaking device (2), characterized in that, The spray drying tower includes a tower body (1), a crushing device (2), and a cyclone device (3); The tower body (1) is hollow inside. The crushing device (2) consists of a drive assembly and multiple crushing assemblies. The crushing assemblies are arranged inside the tower body (1). The crushing assemblies include a rotating shaft (23) and a blade assembly (24). The swirling device (3) includes a guide plate (31), which is disposed on the inner wall of the tower body (1) and is connected to the air pipe through the air passage (14) on the tower body (1).

2. A spray drying tower with a cyclone breaking device (2) according to claim 1, characterized in that, The tower body (1) includes a tower body section (11) and a flow guide section (12); the tower body section (11) is cylindrical and the flow guide section (12) is frustoconical; the flow guide section (12) is integrally formed with the tower body section (11) and the flow guide section (12) is located below the tower body section (11), and a discharge port (13) is provided at the end of the flow guide section (12) away from the tower body section (11).

3. A spray drying tower with a cyclone breaking device (2) according to claim 1, characterized in that, The drive assembly includes a motor (21) and a connecting rod (22) connected to the motor (21). The connecting rod (22) overlaps the upper end of the tower body (1) and is perpendicular to the axis of the tower body (1). The center of the connecting rod (22) coincides with the axis of the tower body (1). A crushing assembly is connected to the connecting rod (22).

4. The spray drying tower with cyclone crushing device (2) according to claim 3, characterized in that, The crushing assembly consists of a rotating shaft (23) and a blade assembly (24). The rotating shaft (23) is connected to the connecting rod (22), and the rotating shaft (23) is evenly distributed along the length of the connecting rod (22). A blade assembly (24) is rotatably connected to the end of the rotating shaft (23) away from the connecting rod (22). The blade assembly (24) consists of multiple sets of blades (25), and the blades (25) rotate along the axis of the rotating shaft (23).

5. A spray drying tower with a cyclone crushing device (2) according to claim 4, characterized in that, The number of the crushing components is 3 sets, and the blade group (24) includes 3 sets of blades (25).

6. The spray drying tower with cyclone crushing device (2) according to claim 5, characterized in that, The distance between the ends of adjacent blades (25) and between the ends of blades (25) and the inner wall of the tower body (1) is ≥50mm, and the distance between the blade group (24) and the discharge port (13) on the tower body (1) is 200-300mm.

7. The spray drying tower with cyclone crushing device (2) according to claim 1, characterized in that, The guide plate (31) includes an inner chamber (312), a guide pipe (311), and a spray hole (313); the guide pipe (311), the inner chamber (312), and the spray hole (313) are all connected, and the guide pipe (311) is inserted into the air passage (14) of the tower body (1).

8. A spray drying tower with a cyclone crushing device (2) according to claim 7, characterized in that, The guide plates (31) are evenly arranged along the axis of the tower body (1), and there are 4 guide plates (31).

9. A spray drying tower with a cyclone crushing device (2) according to claim 7, characterized in that, The number of injection holes (313) is multiple and they are evenly arranged.

10. A spray drying tower with a cyclone crushing device (2) according to claim 7, characterized in that, The direction of the jetting of the jet hole (313) is opposite to that of the tower body (1), and the angle between the tangent at the intersection point of the tower body (1) and the axis of the jet hole (313) is 20-40°.

Images