Multi-temperature-zone spray drying system capable of prolonging curing time

Abstract

The utility model relates to the technical field of cathode material preparation devices, in particular to a multi-temperature-zone spray drying system capable of prolonging curing time. The spray tower comprises a spray tower body, a feeding device, a temperature control device, a circulating water device, an air supply device and a material receiving device, wherein the spray tower body is divided into three temperature zones including a normal-temperature zone, a medium-temperature zone and a high-temperature zone from top to bottom; the feeding device comprises a peristaltic pump, a feeding pipe, a rotary joint and a rotary spray gun; the temperature control device comprises a thermocouple, a temperature sensor and a temperature display; the circulating water device comprises a water tank and a circulating water pump; the air supply device comprises an induced draft fan, an air feeder, an air guide pipe, an air gun and an air compressor; and the material receiving device comprises a cyclone material receiving tower and a material receiving bottle. The device can monitor the temperature change of the spray drying system in real time, the temperature change range is controlled by adjusting the tail gas supplementing amount, the pre-curing area is added, and the material curing time is prolonged and the yield is improved by utilizing the synergistic effect of the rotary spray gun spraying upwards and damping air at the bottom.

Description

Technical Field

[0001] The utility model relates to the technical field of negative electrode material preparation devices, in particular to a multi-temperature zone spray drying system for prolonging the curing time. Background Technique

[0002] Traditional spray drying equipment usually includes a feeding device, an atomizer, a drying tower, a collection device, etc. Its principle is to send the prepared slurry into the atomizer through the feeding device, and then the atomizer atomizes it into fine liquids. These fine liquids contact with the hot air in the drying tower to achieve instantaneous evaporation of water and form solid powders. However, the spray drying system used in the prior art has the problem of short curing time. For some special materials that require a long curing time to form specific structures or properties, such as resin materials, the expected effect cannot be achieved, resulting in a significant decrease in the yield. Moreover, the spray drying system used in the prior art does not have the ability to observe temperature changes, and technicians cannot judge the overall temperature change of the system and make adaptive adjustments to the system, affecting the flexible use of the spray drying system.

[0003] Therefore, how to design a spray drying system to improve the curing effect of the spray drying system, prolong the curing time, have strong flexibility in use and ensure a high material yield has become the current research focus. Summary of the Invention

[0004] The main purpose of the utility model is to solve the problem in the prior art that the curing time is short and the material is easily affected by the temperature change of different equipment parts, resulting in the inability to obtain materials with specific structures or properties, thus affecting the overall material yield. A spray drying system for prolonging the curing time is proposed, which can intuitively and real-time monitor the temperature changes of different equipment parts of a conventional spray drying system and flexibly adjust the temperature of each equipment component.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions:

[0006] A multi-temperature zone spray drying system for prolonging the curing time, which at least includes a spray tower body, a feeding device, a temperature control device, a circulating water device, a air supply device and a material collection device; wherein,

[0007] The spray tower body is divided into three temperature zones, namely a normal temperature zone, a medium temperature zone and a high temperature zone, and a blanking zone from top to bottom;

[0008] The feeding device includes a peristaltic pump, a feeding pipe, a pre-curing zone, a rotary joint and a rotary spray gun. The pre-curing zone is located at the top normal temperature zone of the spray tower body. There is a feeding port at the top of the pre-curing zone, which is connected to the peristaltic pump through the feeding pipe. The bottom of the pre-curing zone is connected to the rotary spray gun through the rotary joint, and the rotary spray gun extends into the tower body;

[0009] The temperature control device includes a thermocouple, a temperature sensor, and a temperature display;

[0010] The circulating water device includes a water tank and a circulating water pump;

[0011] The air supply device includes an induced draft fan, a forced draft fan, a duct, an air gun, and an air compressor;

[0012] The material receiving device includes a cyclone material receiving tower, a material receiving bottle, and a material receiving bottle heat preservation device; the material receiving device is connected to the blanking area through a material receiving pipe.

[0013] Preferably, the outer shell of the pre-curing area is of a double-layer structure;

[0014] Preferably, the outer shell of the temperature zone part of the spray tower is of a double-layer structure, and the outer shell of the blanking area is of a single-layer structure;

[0015] More preferably, the surface of the outer shell of the blanking area is coated with a heat preservation coating.

[0016] By adopting the above technical solutions, the pre-curing area and the temperature zone part of the spray tower are designed to be of a double-layer structure, which is beneficial to subsequent temperature adjustment using the tail gas. The double-layer structure of the outer shell of the upper temperature zone of the tower body and the heat preservation coating on the outer shell of the blanking area can reduce the heat loss of the tower body as a whole and improve the temperature adjustment range of the device.

[0017] Preferably, the number of nozzles of the rotary spray gun is at least one, and the nozzle direction of the rotary spray gun is vertically upward;

[0018] Preferably, a number of air inlets and air outlets are provided on the spray tower body and the material receiving bottle device;

[0019] More preferably, the air inlets and air outlets include a pre-curing area air inlet, a pre-curing area air outlet, a medium temperature area air inlet, a medium temperature area air outlet, a high temperature area air inlet, and a material receiving bottle heat preservation device air inlet and air outlet.

[0020] Preferably, the various air inlets and air outlets are connected by ducts;

[0021] More preferably, the duct is a thickened high-temperature resistant air duct;

[0022] More preferably, the air inlets and air outlets are connected to the ducts in the way of stainless steel flanges;

[0023] More preferably, a gas flow control valve is provided at the connection between the air inlets and air outlets and the ducts.

[0024] Preferably, the induced draft fan is connected between the material receiving device and the spray tower body through a duct;

[0025] Preferably, the air blower is arranged outside the high-temperature area of the spray tower body and is connected to the air inlet of the high-temperature area;

[0026] More preferably, a thermocouple is arranged above the air blower, so that the gas passes through the thermocouple to obtain a certain temperature and then enters the spray tower body through the air inlet of the high-temperature area.

[0027] By adopting the above technical solution, each area is connected through a gas guide pipe, which is convenient for the high-temperature tail gas passing through the high-temperature area to be reused among other areas that require temperature control, improves the stability of the heat source, and achieves the purpose of extending the curing time of special materials.

[0028] Even more preferably, heating coils are arranged in the interlayer of the outer shell of the pre-curing area, and heating coils are arranged in the interlayer of the outer shell of the medium-temperature area of the spray tower body. The heating coils are made of stainless steel coated with a polytetrafluoroethylene coating;

[0029] By adopting the above technical solution, heating coils are arranged in the double-shell structure of the pre-curing area and the medium-temperature area of the spray tower body to ensure that the materials can be evenly heated in the two areas, and to avoid the influence of material temperature differences on the subsequent product yield.

[0030] Preferably, a heat preservation device for the receiving bottle is arranged outside the receiving bottle;

[0031] By adopting the above technical solution, a heat preservation device is added outside the receiving bottle to reduce the temperature difference between the inner and outer walls of the receiving bottle, avoid the sticking of materials due to the water vapor generated by the temperature difference of the receiving bottle, and improve the material yield.

[0032] Preferably, the temperature sensors are respectively arranged on the outer wall of the water tank, the air outlet of the medium-temperature area of the spray tower, the air inlet duct of the high-temperature area, and the material outlet of the feeding area;

[0033] Preferably, the temperature display is respectively electrically connected to the four temperature sensors to display the temperature values of different parts in real time;

[0034] By adopting the above technical solution, the temperature changes of different temperature measurement points are observed in real time through the temperature sensors and the temperature display, which is convenient for adjusting the gas supply amount according to the temperature changes of each part.

[0035] Preferably, a circulating water inlet and an outlet are arranged on the outer wall of the normal-temperature area and are connected to the water tank and the circulating water pump through water pipes;

[0036] By adopting the above technical solution, the temperature of the normal-temperature area can be controlled by turning on the circulating water pump according to the temperature value of the temperature display.

[0037] Furthermore, an air gun is arranged at the bottom of the spray tower body;

[0038] By adopting the above technical solution, a weak upward wind is formed at the bottom of the spray tower body by using the air gun to delay the falling of the material and extend the curing time, and finally a material with the original spray morphology and complete curing is obtained.

[0039] Preferably, a filter is provided at the connection between the cyclone dust collecting tower and the tail gas pipeline.

[0040] By adopting the above technical solution, it is possible to effectively reduce the entrainment of materials during the reuse of tail gas and reduce material loss.

[0041] All the metal structural parts used in the present utility model are made of 304 stainless steel material except for special instructions, with high strength, corrosion resistance and easy welding and processing.

[0042] In summary, the purpose of the present utility model is to design a multi-temperature zone spray drying device that can extend the curing time. The spray tower is divided into a normal temperature zone, a medium temperature zone and a high temperature zone to alleviate the deformation and fragmentation phenomena caused by the volume change exceeding its own bearing capacity when part of the material is desolvated during spray drying; at the same time, the atomizer is changed to an upward spray form, which can effectively extend the curing time of the material; a damping wind is added at the bottom of the high temperature zone to slow down the falling of the material and further extend the curing time; the tail gas with higher heat is fully utilized, and the tail gas is respectively transported to the receiving bottle heat preservation device, the pre-curing zone, the medium temperature zone and even the circulating water tank through the air duct, and the heat of the tail gas is fully utilized to supplement and heat the heat demand part in the device, which can not only reduce the overall temperature difference of the device, but also greatly improve the heat source stability and ensure the full curing of the material in the tower body; a heat preservation device is installed on the receiving bottle to reduce the change of the material during the collection process, effectively ensure a high yield and greatly improve the production efficiency.

[0043] Therefore, the present utility model has the following beneficial effects:

[0044] 1. A multi-temperature zone spray drying tower and a real-time temperature monitoring device are set up. According to the feedback of the temperature zone function and temperature value, the temperature range of each temperature zone is adjusted adaptively, which enhances the flexibility of the spray drying system and increases the types of materials that can be spray dried;

[0045] 2. The tail gas is reused multiple times. The tail gas with a relatively high temperature discharged from the high temperature zone is recycled, which improves the energy utilization rate and also ensures the stability of the heat source;

[0046] 3. By setting up a pre-curing zone, the material is pre-cured before spraying; the nozzle direction is changed, and a damping wind is added to act synergistically to delay the falling of the material and extend the curing time of the material, so that the material maintains the original spray morphology to the greatest extent and improves the material yield;

[0047] 4. The structure of the present utility model is simple, easy to operate and has a wide range of applications. Brief Description of the Drawings

[0048] Figure 1 FIG. is a schematic structural diagram of a multi-temperature zone spray drying device capable of extending the curing time according to an embodiment of the present invention;

[0049] Figure 2 FIG. is a schematic structural diagram of a feeding device of a multi-temperature zone spray drying system capable of extending the curing time according to an embodiment of the present invention;

[0050] Figure 3 FIG. is a schematic structural diagram of a circulating water device of a multi-temperature zone spray drying system capable of extending the curing time according to an embodiment of the present invention;

[0051] Figure 4 FIG. is a schematic structural diagram of a temperature control device of a multi-temperature zone spray drying system capable of extending the curing time according to an embodiment of the present invention;

[0052] Figure 5 FIG. is a schematic structural diagram of a spray tower body of a multi-temperature zone spray drying system capable of extending the curing time according to an embodiment of the present invention;

[0053] Figure 6 FIG. is a schematic structural diagram of a material collecting device of a multi-temperature zone spray drying system capable of extending the curing time according to an embodiment of the present invention;

[0054] Figure 7 FIG. is a schematic structural diagram of a air supply device of a multi-temperature zone spray drying system capable of extending the curing time according to an embodiment of the present invention;

[0055] Figure 8 FIG. is a schematic diagram of the gas flow direction of the tail gas recycling of a multi-temperature zone spray drying system capable of extending the curing time according to an embodiment of the present invention.

[0056] In the figure:

[0057] 1. Feeding device; 11. Peristaltic pump; 12. Feeding pipe; 13. Pre-curing zone; 14. Rotary joint; 15. Rotary spray gun;

[0058] 2. Circulating water device; 21. Water tank; 22. Circulating water pump; 231. Circulating water inlet; 232. Circulating water outlet;

[0059] 3. Temperature control device; 31. Temperature display; 32. Thermocouple; 33. Temperature sensor;

[0060] The 33 temperature sensor includes: 331. Circulating water tank temperature sensor; 332. Medium temperature zone air outlet temperature sensor; 333. High temperature zone intake duct temperature sensor; 334. Discharge area outlet temperature sensor;

[0061] 4. Spray tower body; 41. Normal temperature zone; 42. Medium temperature zone; 43. High temperature zone; 44. Feeding zone;

[0062] 5. Material receiving device; 51. Cyclone material receiving tower; 52. Material receiving bottle; 53. Material receiving bottle heat preservation device;

[0063] 6. Air supply device; 61. Induced draft fan; 62. Air outlet; 63. Air compressor; 64. Blower; 65. Air gun;

[0064] The air outlet 62 includes: 621. Inlet of pre-curing zone; 622. Outlet of pre-curing zone; 623. Inlet of medium temperature zone; 624. Outlet of medium temperature zone; 625. Inlet of material receiving bottle heat preservation device; 626. Outlet of material receiving bottle heat preservation device; 627. Inlet of high temperature zone. Detailed implementation mode

[0065] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0066] As Figure 1 shown, in an embodiment of the present utility model, a multi-temperature zone spray drying device for extending the curing time includes a feeding device 1, a circulating water device 2, a temperature control device 3, a spray tower body 4, a material receiving device 5 and an air supply device 6. Among them, the pre-curing zone 13, the rotary joint 14 and the rotary spray gun 15 in the feeding device 1 are arranged inside the spray tower body 4 and are connected to the peristaltic pump 11 through the feeding pipe 12; the circulating water device 2 is connected to the spray tower body 4 through a water pipe; the temperature control device 3 is connected to the spray tower body 4 through a sensor; the material receiving device 5 is connected to the spray tower body 4 through a guide pipe; the air supply device 6 is connected to the spray tower body 4 through a gas pipe.

[0067] In an embodiment of the present utility model, turn on the induced draft fan 61 to make the air flow inside the device, turn on the blower 64 and the thermocouple 32, and heat the gas sent out by the blower 64 through the thermocouple 32; the high-temperature gas enters the high-temperature zone 43 of the spray tower body through the air inlet of the high-temperature zone 43. Due to the high flow rate, the high-temperature gas impacts on the inner wall of the tower and forms an upward swirling air flow, providing an initial temperature for the medium temperature zone 42 and the normal temperature zone 41.

[0068] Observe the temperature display 31. When the temperature is appropriate, turn on the air compressor 63 and the peristaltic pump 11 for feeding and spraying. Place the spray-dried material in the peristaltic pump 11. The peristaltic pump 11 sends the material through the feeding hose and enters the pre-curing zone 13 through the feeding pipe 12; the pre-curing zone 13 is connected to the rotary spray gun 15 through the rotary joint 14. The pressure provided by the air compressor 63 can atomize the liquid and make the rotary spray gun 15 rotate at the same time. The material is then sprayed upward by the rotary spray gun 15 through the rotary joint 14 into the spray tower body 4, achieving the effect of rotary spraying.

[0069] According to the actual temperature change shown by the temperature display 31, turn on the circulating water pump 22 to control the temperature of the normal temperature area 41, and finally turn on the air gun 65 to form a weak upward wind at the bottom of the high-temperature area 43 of the spray tower to extend the curing time.

[0070] After the material is sprayed out by the rotary spray gun 15 in the spray tower 4, it gradually falls to the blanking area 44, enters the cyclone dust collection tower 51 under the drive of a certain high-temperature gas, and finally enters the collection bottle 52 for material collection; after the material is collected, the excess gas is discharged from the cyclone dust collection tower 51 and enters the air duct, which is the tail gas for subsequent recycling. A fully enclosed collection bottle heat preservation device 53 is arranged outside the collection bottle 52, and a collection bottle heat preservation device air inlet 625 and a collection bottle heat preservation device air outlet 626 are arranged on the collection bottle heat preservation device 53. Part of the tail gas with a relatively high temperature is introduced into the collection bottle heat preservation device 53 by using the air duct to reduce the temperature difference between the inner and outer walls of the collection bottle, and avoid the material from becoming sticky due to the temperature difference of the collection bottle, so as to finally obtain the material with the original spray morphology and complete curing.

[0071] In an embodiment of the present invention, the remaining tail gas enters the outer shell interlayer of the pre-curing area 13 and the outer shell interlayer of the medium-temperature area 42 in sequence along the air duct under the action of the induced draft fan 61.

[0072] The outer shell of the pre-curing area 13 is a double-layer structure, and heating coils are arranged in the outer shell interlayer. The heating of the coils by the tail gas ensures that the pre-curing area 13 is heated evenly as a whole, so that the material obtains an initial temperature, better adapts to subsequent temperature changes, and avoids changes in properties or morphology caused by excessive temperature changes of the material during the spraying process; the nozzle direction of the rotary spray gun 15 is changed from the conventional downward direction to upward, which can extend the falling time of the material to a certain extent, ensure that the material is continuously heated in the spray tower, and extend the curing time of the material.

[0073] The outer shell of the medium-temperature area 42 is a double-layer structure, and heating coils are arranged in the outer shell interlayer. The heating of the coils by the tail gas ensures that the pre-curing area 13 is heated evenly as a whole, ensures the curing effect of the medium-temperature area 42, and reduces the temperature change of the medium-temperature area 42 according to the requirements of the target material to ensure the stability of the heat source.

[0074] In an embodiment of the present invention, through the real-time temperature display of the temperature sensor 334 at the blanking area discharge port by the temperature display 31, combined with the characteristics of the target material and the process requirements, the thermocouple 32 and the gas flow control valves arranged at the connections of each inlet, outlet and air duct can be appropriately adjusted. By changing the initial gas temperature and the utilization amount of the tail gas, the appropriate temperature range of different temperature zones is controlled, the adjustable range of the overall temperature of the spray drying system is increased, and the adaptability of the spray drying system to different materials is improved; when necessary, the air duct can be increased to heat the circulating water tank 21 by using the tail gas to further increase the temperature adjustment range of the normal temperature area 41.

[0075] In summary, a multi-temperature zone spray drying device of the present utility model that can extend the curing time is based on the conventional spray drying tower body. The spray tower is divided into a normal temperature zone, a medium temperature zone, and a high temperature zone, alleviating the phenomenon that when some materials are desolvated during spray drying, the volume change exceeds their own bearing capacity, resulting in material deformation and fragmentation; at the same time, the atomizer is changed to an upward spray form, which can effectively extend the curing time of the material, and a damping wind is added at the bottom of the high temperature zone to slow down the falling of the material, further extending the curing time; fully utilize the tail gas with relatively high heat, and use the gas guide pipe to transport the tail gas to the insulation device of the collection bottle, the pre-curing zone, the medium temperature zone and even the circulation water tank respectively, and make full use of the heat of the tail gas to supplement and heat the parts with heat demand in the device, which can not only reduce the overall temperature difference of the device, but also greatly improve the heat source stability, ensuring that the material is fully cured in the tower body; install an insulation device for the collection bottle to reduce the change of the material during the collection process, effectively ensuring a high yield and greatly improving the production efficiency.

[0076] This specific embodiment is only an explanation of the present utility model, and it is not a limitation of the present utility model. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. A multi-temperature zone spray drying system for prolonging curing time, comprising at least a feeding device (1), a spray tower body (4), a collecting device (5) and an air supply device (6); characterized in that: The feeding device (1) is provided with a pre-curing zone (13), the pre-curing zone (13) is located at the top of the spray tower body (4), one end of the pre-curing zone is connected to the peristaltic pump (11) through the feeding pipe (12), and the other end is connected to the rotary spray gun (15) through the rotary joint (14), and the rotary spray gun (15) extends into the interior of the tower body (4); the spray tower body (4) is divided from top to bottom into a normal temperature zone (41), a medium temperature zone (42), a high temperature zone (43) and a feed zone (44); The material receiving device (5) is connected to the material unloading area (44) via a material receiving pipe; The air supply device (6) is connected to the spray tower body (4) and the material receiving device (5) respectively through the air guide pipe.

2. A multi-temperature zone spray drying system for prolonging curing time according to claim 1, characterized in that: The outer shell of the pre-curing zone (13) is a double-layer structure, and a heating coil is arranged in the interlayer of the outer shell of the pre-curing zone (13).

3. A multi-temperature zone spray drying system for prolonging curing time according to claim 1, characterized in that: The number of nozzles of the rotary spray gun (15) is at least one, and the direction of the nozzles of the rotary spray gun (15) is vertically upward.

4. A multi-temperature zone spray drying system for prolonging curing time according to claim 1, characterized in that: The outer shells of the normal temperature zone (41), the medium temperature zone (42) and the high temperature zone (43) of the spray tower body (4) are all double-layer structures, and the outer shell of the material discharge zone (44) is a single-layer structure. The outer shell surface of the material discharge zone (44) is coated with a thermal insulation coating.

5. A multi-temperature zone spray drying system for prolonging curing time according to claim 1, characterized in that: A heating coil is provided in the outer shell interlayer of the medium temperature zone (42).

6. A multi-temperature zone spray drying system for prolonging curing time according to claim 1, characterized in that: The material receiving device (5) comprises a cyclone material receiving tower (51), a material receiving bottle (52), and a material receiving bottle heat preservation device (53); the material receiving device (5) is connected to the material discharge area (44) via a material discharge pipe.

7. A multi-temperature zone spray drying system for prolonging curing time according to claim 1, characterized in that: The air supply device (6) comprises an induced draft fan (61), an air compressor (63), an air supply fan (64), and an air gun (65); the induced draft fan (61), the air compressor (63), and the air supply fan (64) are connected to the spray tower body (4) via an air guide pipe.

8. A multi-temperature zone spray drying system for prolonging curing time according to claim 7, characterized in that: The air gun (65) is located at the bottom of the high temperature zone (43) of the spray tower, and provides damping wind from the bottom of the high temperature zone (43) of the spray tower upward.

9. The multi-temperature zone spray drying system for prolonging curing time according to claim 1, characterized in that: The system further comprises a circulating water device (2), wherein the circulating water device (2) comprises a water tank (21) and a circulating water pump (22), wherein the water tank (21) and the circulating water pump (22) are connected to the outside of the normal temperature zone (41) via a water pipe.

10. The multi-temperature zone spray drying system for prolonging curing time according to claim 1, characterized in that: The system further comprises a temperature control device (3), wherein the temperature control device (3) comprises a temperature display (31), a thermocouple (32), and a temperature sensor (33), wherein the temperature display (31) and the temperature sensor (33) are electrically connected.

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