Spray drying equipment and battery production system

Abstract

The utility model provides spray drying equipment and a battery production system.The spray drying equipment comprises a drying tower, a double-fluid nozzle, an ultrasonic generator and a drying device, a containing cavity is formed in the drying tower, the double-fluid nozzle is connected to the drying tower, and the double-fluid nozzle is used for atomizing fluid materials through compressed gas and spraying the fluid materials into the containing cavity; the ultrasonic generator is arranged at a nozzle opening of the double-fluid nozzle, and the drying device is used for introducing dry gas into the containing cavity so as to dry the fluid materials into powder. In the structure, the ultrasonic generator is arranged at the nozzle of the double-fluid nozzle for spraying the atomized fluid material into the accommodating cavity, so that the particle size of fog drops can be further reduced, the particle size of prepared powder is relatively small, and residual materials at the nozzle of the double-fluid nozzle can be removed, so that the double-fluid nozzle can spray smoothly; the process of preparing the powder is stable, and the quality of the prepared material is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a spray drying device and a battery production system. Background Art

[0002] Batteries have the advantages of high specific energy and high power density. They are widely used in electronic devices and transportation vehicles, such as mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric tools, etc.

[0003] As people's requirements for battery quality are getting higher and higher, people's requirements for the quality of materials in the battery production process are also getting higher and higher. How to improve the quality of materials has attracted more and more attention from technicians in this field. Utility Model Content

[0004] In view of the above problems, the present application provides a spray drying device and a battery production system, wherein the spray drying device is beneficial to improving the quality of the prepared materials.

[0005] In a first aspect, some embodiments of the present application provide a spray drying equipment, which includes a drying tower, a two-fluid nozzle, an ultrasonic generator and a drying device. The drying tower forms a cavity, the two-fluid nozzle is connected to the drying tower, the two-fluid nozzle is used to use compressed gas to atomize the fluid material and spray it into the cavity, the ultrasonic generator is arranged at the nozzle of the two-fluid nozzle, and the drying device is used to pass drying gas into the cavity to dry the fluid material to form a powder.

[0006] In the above structure, since an ultrasonic generator is provided at the nozzle of the dual-fluid nozzle that sprays the atomized fluid material into the cavity, it can not only further reduce the particle size of the droplets and make the prepared powder material smaller in particle size, but also remove the residual material at the nozzle of the dual-fluid nozzle, so that the spray of the dual-fluid nozzle is smooth, the process of preparing the powder is stable, and it is beneficial to improve the quality of the prepared material.

[0007] According to the spray drying equipment provided in some embodiments of the present application, the nozzle of the dual-fluid nozzle is arranged downward in the vertical direction. By arranging the nozzle of the dual-fluid nozzle downward in the vertical direction, the droplets sprayed from the nozzle fall downward under the action of airflow and gravity, reducing the possibility of the droplets hanging on the inner wall of the cavity, which is not only beneficial to the cleaning of the drying tower, but also beneficial to improving the production efficiency of the spray drying equipment.

[0008] According to the spray drying equipment provided in some embodiments of the present application, a plurality of dual-fluid nozzles are provided, and the plurality of dual-fluid nozzles are arranged at intervals at the top of a drying tower. The dual-fluid nozzles are detachably connected to the drying tower, so that the dual-fluid nozzles are easy to disassemble and the formed droplets are evenly distributed in the cavity, which is beneficial to improving the consistency of the prepared powder.

[0009] According to the spray drying equipment provided in some embodiments of the present application, the drying device includes a heating device and a filtering device, the air inlet of the filtering device is connected to the air outlet of the heating device, and the air outlet of the filtering device is connected to the cavity, so that the drying gas introduced into the cavity by the drying device is the gas heated by the heating device and dehumidified by the filtering device, so that the drying gas can better dry the fluid material (droplets).

[0010] According to the spray drying equipment provided in some embodiments of the present application, the spray drying equipment also includes a feeding device and a collecting device. The feeding device is connected between the discharge port of the drying tower and the collecting device to facilitate the subsequent transportation and storage of the powder.

[0011] According to the spray drying equipment provided in some embodiments of the present application, the spray drying equipment also includes a recovery device, which connects the exhaust port of the collecting device and the air inlet of the filtering device, thereby realizing the recovery and utilization of heat in the drying gas, which is beneficial to reducing the energy consumption of the spray drying equipment.

[0012] According to the spray drying equipment provided in some embodiments of the present application, the feeding device includes a blower and a material receiver. The material receiver is arranged at the discharge port. The airflow generated by the blower sends the powder received by the material receiver to the collecting device, which is not only conducive to improving the automation of the powder conveying process, but also conducive to reducing the possibility of the powder being damp or contaminated during the conveying process.

[0013] According to the spray drying equipment provided in some embodiments of the present application, the collecting device includes a cyclone separator and a bag dust collector. The feed port of the cyclone separator is connected to the material receiver, and the feed port of the bag dust collector is connected to the exhaust port of the cyclone separator. The powder in the mixture can be better intercepted, which is beneficial to reduce the loss of powder.

[0014] According to the spray drying equipment provided in some embodiments of the present application, the drying tower is provided with a pressure relief mechanism, which is used to connect the chamber with the outside air. When the pressure in the chamber reaches a threshold, the pressure relief mechanism can connect the chamber with the outside air, so that the pressure in the chamber is released, so that the pressure in the chamber is reduced, and the possibility of explosion of the drying tower is reduced.

[0015] According to the spray drying equipment provided in some embodiments of the present application, the ultrasonic generator includes a body and an ultrasonic transducer that are connected to each other. The body is connected to the dual-fluid nozzle, and the ultrasonic transducer is arranged around the outer periphery of the nozzle, so that the ultrasonic wave emitted by the ultrasonic transducer can better act on the droplets sprayed from the nozzle, which is beneficial to improve the ultrasonic wave's crushing effect on the droplets, thereby helping to further reduce the particle size of the droplets.

[0016] In a second aspect, some embodiments of the present application further provide a battery production system, which includes a spray drying device provided by any of the aforementioned technical solutions, and the spray drying device is used to provide powder.

[0017] The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0018] The present application provides a spray drying device, which includes a drying tower, a two-fluid nozzle, an ultrasonic generator and a drying device, wherein the drying tower is formed with a cavity, the two-fluid nozzle is connected to the drying tower, the two-fluid nozzle is used to atomize a fluid material using compressed gas and spray it into the cavity, the ultrasonic generator is arranged at the nozzle of the two-fluid nozzle, and the drying device is used to pass a dry gas into the cavity to dry the fluid material to form a powder. In the above structure, since the ultrasonic generator is arranged at the nozzle of the two-fluid nozzle that sprays the atomized fluid material into the cavity, it can not only further reduce the particle size of the droplets, so that the particle size of the prepared powder is smaller, but also can remove the residual material at the nozzle of the two-fluid nozzle, so that the spray of the two-fluid nozzle is smooth, and the process of preparing the powder is stable, which is conducive to improving the quality of the prepared material.

[0019] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings.

[0021] Figure 1 A schematic diagram of the structure of a spray drying device provided in some embodiments of the present application;

[0022] Figure 2 A schematic diagram of the structure of an ultrasonic generator in a spray drying device provided in some embodiments of the present application.

[0023] In the attached picture:

[0024] 1. Drying tower; 11. Container; 12. Pressure relief mechanism; 2. Dual-fluid nozzle; 21. Nozzle; 3. Ultrasonic generator; 31. Machine body; 32. Ultrasonic transducer; 4. Drying device; 41. Heating device; 42. Filtering device; 5. Feeding device; 51. Blower; 52. Receiver; 6. Collecting device; 61. Cyclone separator; 62. Bag dust collector; 7. Recovery device. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0026] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0027] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0028] In addition, the technical terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0029] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0030] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] At present, judging from the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields.

[0032] In the prior art, materials used to produce battery active materials usually require materials in powder form for subsequent processing. Currently, such materials are usually obtained by sintering active material solutions and then crushing the sintered materials to obtain powders. However, the powder particles obtained in this way are unstable in shape and have a large particle size, resulting in poor quality of the powder.

[0033] In order to improve the quality of materials, the present application provides a spray drying device, which includes a drying tower, a two-fluid nozzle, an ultrasonic generator and a drying device. The drying tower is formed with a cavity, the two-fluid nozzle is connected to the drying tower, the two-fluid nozzle is used to atomize the fluid material with compressed gas and spray it into the cavity, the ultrasonic generator is arranged at the nozzle of the two-fluid nozzle, and the drying device is used to pass dry gas into the cavity to dry the fluid material to form powder. In the above structure, since the ultrasonic generator is arranged at the nozzle of the two-fluid nozzle that sprays the atomized fluid material into the cavity, it can not only further reduce the particle size of the droplets, so that the particle size of the prepared powder is smaller, but also can remove the residual material at the nozzle of the two-fluid nozzle, so that the spray of the two-fluid nozzle is smooth, and the process of preparing the powder is stable, which is conducive to improving the quality of the prepared material.

[0034] The spray drying equipment disclosed in the embodiments of the present application can be used, but is not limited to, for preparing powdered active material, and can also be used for drying fuels, intermediates, soap powders, inorganic salts, etc., so as to obtain materials of better quality.

[0035] Some embodiments of the present application provide a spray drying device, referring to Figure 1The spray drying equipment includes a drying tower 1, a two-fluid nozzle 2, an ultrasonic generator 3 and a drying device 4. The drying tower 1 is formed with a cavity 11. The two-fluid nozzle 2 is connected to the drying tower 1. The two-fluid nozzle 2 is used to atomize the fluid material by compressed gas and spray it into the cavity 11. The ultrasonic generator 3 is arranged at the nozzle 21 of the two-fluid nozzle 2. The drying device 4 is used to pass dry gas into the cavity 11 to dry the fluid material to form powder. In the above structure, since the ultrasonic generator 3 is arranged at the nozzle 21 of the two-fluid nozzle 2 for spraying the atomized fluid material into the cavity 11, it can not only further reduce the particle size of the droplets, so that the particle size of the prepared powder is smaller, but also can remove the residual material at the nozzle 21 of the two-fluid nozzle 2, so that the spray of the two-fluid nozzle 2 is smooth, and the process of preparing the powder is stable, which is conducive to improving the quality of the prepared material.

[0036] The drying tower 1 may be a device for providing a space for drying a fluid material. The cavity 11 may be a cavity structure formed by the drying tower 1, which is located inside the drying tower 1. The fluid material can be atomized in the cavity 11 and dried to form a powder. The drying tower 1 can reduce the possibility of leakage of the material from the cavity 11 to the outside.

[0037] The dual-fluid nozzle 2 can be a device for atomizing a material in a fluid state to obtain a material in a droplet state. The dual-fluid nozzle 2 atomizes the fluid material into droplets by using compressed gas, and sprays the droplets into the cavity 11 so that the droplets can be further processed later.

[0038] The twin-fluid nozzle 2 is connected to the drying tower 1 to atomize the fluid material and spray it into the cavity 11 of the drying tower 1. Exemplarily, the nozzle 21 of the twin-fluid nozzle 2 partially extends into the cavity 11, so that the droplets sprayed from the nozzle 21 can enter the cavity 11; the feed port of the twin-fluid nozzle 2 extends from the drying tower 1 to the outside, so that compressed gas and fluid material can be transported to the twin-fluid nozzle 2 from the outside.

[0039] The spray drying device also includes a feeding device 5, which is connected to the feed port of the two-fluid nozzle 2 and is used to deliver compressed gas and fluid materials to the two-fluid nozzle 2. Exemplarily, the feeding device 5 may include an air compressor and a liquid injector, the air compressor is used to deliver compressed gas to the feed port of the two-fluid nozzle 2, and the liquid injector is used to deliver fluid materials to the feed port of the two-fluid nozzle 2.

[0040] The ultrasonic generator 3 can be used as a device for generating ultrasonic waves. By arranging the ultrasonic generator 3 at the nozzle 21 of the dual-fluid nozzle 2, not only can the ultrasonic wave be used to act on the droplets sprayed from the nozzle 21, so that the droplets are further crushed to obtain droplets with a smaller particle size, but also the ultrasonic wave can be used to clean the residual material at the nozzle 21, reducing the possibility of the material accumulating at the nozzle 21 and clogging the nozzle 21.

[0041] The drying device 4 can be used to dry the droplets in the cavity 11 to convert the droplets into particles. The drying device 4 allows the dry gas to be introduced into the cavity 11 to evaporate the water in the droplets, thereby drying the fluid material to form a powder.

[0042] In the above structure, since an ultrasonic generator 3 is provided at the nozzle 21 of the twin-fluid nozzle 2 for spraying atomized fluid material into the cavity 11, it can not only further reduce the particle size of the droplets, so that the particle size of the prepared powder is smaller, but also remove the residual material at the nozzle 21 of the twin-fluid nozzle 2, so that the spray of the twin-fluid nozzle 2 is smooth, the process of preparing the powder is stable, and it is beneficial to improve the quality of the prepared material.

[0043] In some embodiments, the nozzle 21 of the two-fluid nozzle 2 is arranged vertically downward.

[0044] By arranging the nozzle 21 of the dual-fluid nozzle 2 downward in the vertical direction, the droplets sprayed from the nozzle 21 fall downward under the action of airflow and gravity, reducing the possibility of the droplets sticking to the inner wall of the cavity 11, which is not only beneficial to the cleaning of the drying tower 1, but also beneficial to improving the production efficiency of the spray drying equipment.

[0045] In some embodiments, a plurality of the two-fluid nozzles 2 are provided, and the plurality of two-fluid nozzles 2 are arranged at intervals at the top of the drying tower 1 , and the two-fluid nozzles 2 are detachably connected to the drying tower 1 .

[0046] By arranging the two-fluid nozzle 2 at the top of the drying tower 1, the mist droplets sprayed from the nozzle 21 of the two-fluid nozzle 2 have a longer falling stroke, which is beneficial to prolong the falling time of the mist droplets, thereby facilitating improving the drying effect of the mist droplets.

[0047] By providing a plurality of two-fluid nozzles 2, the spray drying equipment can utilize the plurality of two-fluid nozzles 2 to atomize the liquid material with higher efficiency, which is beneficial to improving the production efficiency of the spray drying equipment.

[0048] Multiple dual-fluid nozzles 2 are arranged at intervals at the top of the drying tower 1. Multiple dual-fluid nozzles 2 can be arranged at equal intervals at the top of the drying tower 1, so that the droplets formed by the dual-fluid nozzles 2 are evenly distributed in the cavity 11, which is beneficial to improving the consistency of the prepared powder.

[0049] The two-fluid nozzle 2 is detachably connected to the drying tower 1 , so that the two-fluid nozzle 2 is detachable from the drying tower 1 , making it convenient to disassemble the two-fluid nozzle 2 .

[0050] In some embodiments, the drying device 4 includes a heating device 41 and a filtering device 42 , the air inlet of the filtering device 42 is connected to the air outlet of the heating device 41 , and the air outlet of the filtering device 42 is connected to the containing cavity 11 .

[0051] The heating device 41 may be a device for heating the drying gas, which can increase the temperature of the drying gas and increase the drying speed of the fluid material by the drying gas. For example, the heating device 41 may include an indirect hot air furnace, which may use natural gas as fuel.

[0052] The filter device 42 may be a device for removing moisture from the drying gas. When the drying gas flows through the filter device 42, the moisture in the drying gas will be retained in the filter device 42, so that the moisture content in the drying gas is reduced, which is beneficial for the drying of the droplets by the drying gas.

[0053] By connecting the air inlet of the filter device 42 to the air outlet of the heating device 41, and connecting the air outlet of the filter device 42 to the cavity 11, the dry gas introduced into the cavity 11 by the drying device 4 is the gas heated by the heating device 41 and dehumidified by the filter device 42, so that the dry gas can better dry the fluid material (droplets).

[0054] In some embodiments, the spray drying equipment further includes a feeding device 5 and a collecting device 6 , and the feeding device 5 is connected between the discharge port of the drying tower 1 and the collecting device 6 .

[0055] The feeding device 5 may be a device for conveying the powder obtained in the drying tower 1. The feeding device 5 conveys the powder discharged from the discharge port of the drying tower 1, and can convey the powder to a suitable storage location.

[0056] Exemplarily, the feeding device 5 may be a belt conveyor or a pneumatic conveying device, and those skilled in the art may select the type of the feeding device 5 according to actual conditions.

[0057] The collecting device 6 may be a device for separating and cleaning the materials delivered by the feeding device 5 so as to collect the powder. Collecting the powder by the collecting device 6 can facilitate the subsequent transportation and storage of the powder.

[0058] The feeding device 5 is connected between the discharge port of the drying tower 1 and the collecting device 6 , and the receiving port of the feeding device 5 can be connected to the discharge port of the drying tower 1 , and the discharge port of the feeding device 5 is connected to the feed port of the collecting device 6 .

[0059] The powder discharged from the discharge port of the drying tower 1 is conveyed to the collecting device 6 by the feeding device 5 for separation and collection, so that the spray drying equipment can conveniently obtain the powder without drying gas, and facilitate the transportation and storage of the powder.

[0060] In some embodiments, the spray drying apparatus further comprises a recovery device 7 , and the recovery device 7 connects the exhaust port of the material collecting device 6 and the air inlet of the filtering device 42 .

[0061] The recovery device 7 may be a device for recovering the drying gas and the heat in the drying gas for reuse. The exhaust port of the material collecting device 6 and the air inlet of the filter device 42 are connected by the recovery device 7, so that the drying gas in the material collecting device 6 can enter the filter device 42 from the exhaust port, and can enter the chamber 11 again after being processed (dehumidified and filtered) by the filter device 42, thereby realizing the recovery and utilization of the heat in the drying gas, which is beneficial to reducing the energy consumption of the spray drying equipment.

[0062] Exemplarily, the recovery device 7 may include an air pipeline and a pressurizing fan. After the pressurizing fan pressurizes the dry gas discharged from the exhaust port of the collecting device 6, the dry gas can be connected to the filtering device 42 through the air pipeline.

[0063] In some embodiments, the feeding device 5 includes a blower 51 and a material receiver 52 . The material receiver 52 is disposed at the discharge port. The airflow generated by the blower 51 delivers the powder received by the material receiver 52 to the collecting device 6 .

[0064] By making the feeding device 5 include the blower 51 and the material receiver 52, the feeding device 5 is made into a pneumatic conveying device, which is not only conducive to improving the automation of the powder conveying process, but also conducive to reducing the possibility of the powder being damp or contaminated during the conveying process.

[0065] The blower 51 may be a device for providing airflow in the feeding device 5. The airflow generated by the blower 51 can be used as a power source to drive the powder to be transported downstream. The material receiver 52 may be a device for allowing the powder to smoothly enter the feeding device 5 from the discharge port of the drying tower 1. It can reduce the possibility of the powder forming an arch at the discharge port, which is conducive to improving the smoothness of the powder transportation. By arranging the material receiver 52 at the discharge port, the airflow generated by the blower 51 can smoothly transport the powder received by the material receiver 52 to the collecting device 6.

[0066] In some embodiments, the material collecting device 6 includes a cyclone separator 61 and a bag dust collector 62 , the feed port of the cyclone separator 61 is connected to the material receiver 52 , and the feed port of the bag dust collector 62 is connected to the exhaust port of the cyclone separator 61 .

[0067] By connecting the cyclone separator 61 and the bag dust collector 62 to the downstream of the material receiver 52 in sequence, the mixture of powder and dry gas flows through the cyclone separator 61 and the bag dust collector 62 in sequence. The cyclone separator 61 can separate the powder particles with large inertial centrifugal force toward the outer wall, thereby achieving good separation of dry gas and powder. Since the bag dust collector 62 has good dust collection efficiency, it can better intercept the powder in the mixture, which is conducive to reducing the loss of powder.

[0068] In some embodiments, the drying tower 1 is provided with a pressure relief mechanism 12, and the pressure relief mechanism 12 is used to connect the chamber 11 with the outside air.

[0069] The pressure relief mechanism 12 may be a mechanism for releasing the pressure in the chamber 11. When the pressure in the chamber 11 reaches a threshold, the pressure relief mechanism 12 can connect the chamber 11 with the outside air, so that the pressure in the chamber 11 is released, so that the pressure in the chamber 11 is reduced, and the possibility of explosion of the drying tower 1 is reduced.

[0070] Exemplarily, the pressure relief mechanism 12 includes a pressure relief valve, a relief hole is provided on the wall of the drying tower 1 , and a pressure relief valve sealing cover is provided on the relief hole and connected to the wall of the drying tower 1 .

[0071] In some embodiments, reference Figure 2 The ultrasonic generator 3 includes a body 31 and an ultrasonic transducer 32 which are connected to each other. The body 31 is connected to the two-fluid nozzle 2 , and the ultrasonic transducer 32 is arranged around the outer periphery of the nozzle 21 .

[0072] The body 31 may be the main structure of the ultrasonic generator 3, which is used to carry other components of the ultrasonic generator 3. The ultrasonic transducer 32 may be a component of the ultrasonic generator 3 for converting input electrical power into mechanical power (ie, ultrasonic waves) and then transmitting it out.

[0073] By connecting the body 31 to the two-fluid nozzle 2, the ultrasonic generator 3 can be firmly connected to the two-fluid nozzle 2. By arranging the ultrasonic transducer 32 around the periphery of the nozzle 21, the ultrasonic wave emitted by the ultrasonic transducer 32 can better act on the mist droplets sprayed from the nozzle 21, which is beneficial to improve the ultrasonic wave's crushing effect on the mist droplets, thereby further reducing the particle size of the mist droplets.

[0074] Some embodiments of the present application also provide a battery production system, which includes a spray drying device provided by any of the aforementioned technical solutions, and the spray drying device is used to provide powder. The powder provided by the spray drying device can be a battery active material in a powder state. Since the battery active material in a powder state prepared by the spray drying device provided by the aforementioned technical solution has a higher quality, the battery production system is conducive to improving the quality of the battery.

[0075] Some embodiments of the present application provide a spray drying device, such as Figure 1 As shown, the spray drying equipment includes a drying tower 1, a two-fluid nozzle 2, an ultrasonic generator 3, a drying device 4, a feeding device 5, a collecting device 6, a recovery device 7 and a drying device 4. The two-fluid nozzle 2 uses compressed gas to atomize the fluid material and spray it into the cavity 11. The ultrasonic generator 3 is arranged at the nozzle 21 of the two-fluid nozzle 2. The drying device 4 is used to pass dry gas into the cavity 11 to dry the fluid material to form powder. The feeding device 5 includes a blower 51 and a material receiver 52. The collecting device 6 includes a cyclone separator. 61 and bag dust collector 62, the drying device 4 includes a heating device 41 and a filtering device 42, a material receiver 52 is arranged at the discharge port of the drying tower 1, the airflow generated by the blower 51 sends the powder received by the material receiver 52 to the cyclone separator 61 and the bag dust collector 62, the recovery device 7 is connected to the bag dust collector 62 and the filtering device 42, the heating device 41 heats the gas and sends it to the filtering device 42, the filtering device 42 processes the gas from the heating device 41 and the bag dust collector 62 and then passes it into the cavity 11 of the drying tower 1 again. In the above structure, since the nozzle 21 of the two-fluid nozzle 2 for spraying the atomized fluid material into the cavity 11 is provided with an ultrasonic generator 3, it can not only further reduce the particle size of the droplets, so that the particle size of the prepared powder is smaller, but also can remove the residual material at the nozzle 21 of the two-fluid nozzle 2, so that the spray of the two-fluid nozzle 2 is smooth, the process of preparing the powder is stable, and it is beneficial to improve the quality of the prepared material.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A spray drying device, characterized in that: include: A drying tower is formed with a cavity; A dual-fluid nozzle connected to the drying tower, the dual-fluid nozzle is used to atomize the fluid material using compressed gas and spray it into the cavity; An ultrasonic generator is arranged at the nozzle of the dual-fluid nozzle; The drying device is used to introduce drying gas into the cavity to dry the fluid material to form powder.

2. The spray drying equipment according to claim 1, characterized in that The nozzle of the dual-fluid nozzle is arranged vertically downward.

3. The spray drying equipment according to claim 1, characterized in that The two-fluid nozzles are provided in plurality, and the two-fluid nozzles are arranged at intervals at the top of the drying tower, and the two-fluid nozzles are detachably connected to the drying tower.

4. The spray drying equipment according to claim 1, characterized in that The drying device comprises a heating device and a filtering device, wherein the air inlet of the filtering device is connected to the air outlet of the heating device, and the air outlet of the filtering device is connected to the containing cavity.

5. The spray drying equipment according to claim 4, characterized in that The spray drying equipment also includes a feeding device and a collecting device, wherein the feeding device is connected between the discharge port of the drying tower and the collecting device.

6. The spray drying equipment according to claim 5, characterized in that The spray drying equipment further comprises a recovery device, wherein the recovery device connects the exhaust port of the material collecting device and the air inlet of the filtering device.

7. The spray drying equipment according to claim 5, characterized in that The feeding device comprises a blower and a material receiver. The material receiver is arranged at the discharge port. The airflow generated by the blower sends the powder received by the material receiver to the collecting device.

8. The spray drying equipment according to claim 7, characterized in that The material collecting device comprises a cyclone separator and a bag dust collector. The feed inlet of the cyclone separator is connected to the material receiver, and the feed inlet of the bag dust collector is connected to the exhaust port of the cyclone separator.

9. The spray drying equipment according to claim 1, characterized in that The drying tower is provided with a pressure relief mechanism, and the pressure relief mechanism is used to connect the chamber with the outside air.

10. The spray drying equipment according to claim 1, characterized in that The ultrasonic generator comprises a body and an ultrasonic transducer which are connected to each other. The body is connected to the two-fluid nozzle, and the ultrasonic transducer is arranged around the outer periphery of the nozzle.

11. A battery production system, characterized in that: The method comprises a spray drying device as claimed in any one of claims 1 to 10, wherein the spray drying device is used to provide a powder.

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