A kind of automatic vacuum drying process method

Abstract

The present invention provides an automated vacuum drying process method, comprising: placing high-nickel ternary cathode material into a vacuum dryer; a control module controlling a hot oil supply module to provide heat-conducting oil to heat and dry the material in the vacuum dryer; the control module controlling the vacuum dryer to perform transverse and longitudinal motions; the control module controlling an exhaust module to evacuate the interior of the vacuum dryer; the control module controlling a discharging module to unload the material; the control module controlling a hot air recovery module and a hot oil recovery module to recover the hot air and hot oil in the vacuum dryer; performing a drying quality test on the product, and comparing the control parameters with a drying effect generation database and influencing factors. The method solves the problem that a drying method for the high-nickel ternary cathode material has a poor drying effect and cannot ensure the consistency of the drying effect of the high-nickel ternary cathode material, realizes the automation of the drying of the high-nickel ternary cathode material, and effectively ensures the consistency of the drying effect of the high-nickel ternary cathode material.

Description

Technical Field

[0001] The present invention relates to the field of vacuum drying technology, and in particular to an automated vacuum drying process method suitable for high-nickel ternary positive electrode materials. Background Art

[0002] Lithium batteries offer high energy density, long life, and are lightweight and portable. They are widely used in mobile devices, electric vehicles, drones, solar energy storage, and other fields. With the development of renewable energy and smart grids, lithium batteries will become even more important in the future. Lithium batteries primarily consist of anode materials, cathode materials, separators, electrolytes, and battery casings. The cathode material is the decisive factor in the electrochemical performance of lithium batteries, directly determining their energy density and safety, and thus affecting their overall performance.

[0003] High-nickel ternary positive electrode has become the most promising choice for future lithium battery positive electrode materials due to its high specific capacity. However, since high-nickel ternary positive electrode material is a wet material, it will produce stickiness. The existing drying method for high-nickel ternary positive electrode material has poor drying effect and cannot guarantee the consistency of the drying effect of high-nickel ternary positive electrode material. Summary of the Invention

[0004] The present invention discloses an automated vacuum drying process method, which solves the problem that the existing drying method for high-nickel ternary positive electrode materials has poor drying effect and cannot ensure the consistency of the drying effect of high-nickel ternary positive electrode materials. It realizes the automation of the drying of high-nickel ternary positive electrode materials and effectively ensures the consistency of the drying effect of high-nickel ternary positive electrode materials.

[0005] To achieve the above object, the technical solution of the present invention is specifically implemented as follows:

[0006] The present invention discloses an automated vacuum drying process, comprising the following steps:

[0007] Put the high nickel ternary cathode material into the vacuum dryer;

[0008] The control module controls the hot oil supply module to provide heat-conducting oil to heat and dry the materials in the vacuum dryer;

[0009] The control module controls the vacuum dryer to perform rolling motion and pitching motion;

[0010] The control module controls the vacuum module to vacuum the interior of the vacuum dryer;

[0011] After drying is completed, the control module controls the unloading module to unload the slurry in the vacuum dryer;

[0012] The control module controls the hot air recovery module and the hot oil recovery module to recover the hot air and hot oil in the vacuum dryer;

[0013] The drying quality of the product is tested and the control parameters are compared with the database generated by the drying effect and the influencing factors.

[0014] Furthermore, the specific implementation of placing the high-nickel ternary cathode material into the vacuum dryer includes:

[0015] The material feeding module feeds the high-nickel ternary cathode material into the vacuum dryer, monitors the weight of the high-nickel ternary cathode material fed into the vacuum dryer in real time, and transmits the real-time monitored weight value of the high-nickel ternary cathode material fed into the vacuum dryer to the control module;

[0016] The control module receives, records and stores the weight of the high-nickel ternary positive electrode material delivered by the material delivery module, and compares the obtained weight of the delivered high-nickel ternary positive electrode material with the preset value to control the weight of the high-nickel ternary positive electrode material delivered by the material delivery module.

[0017] Furthermore, the specific implementation of the roll motion and pitch motion of the vacuum dryer includes:

[0018] The X-axis motion frequency sensor and motion amplitude sensor of the vacuum dryer monitor the motion frequency and motion amplitude of the vacuum dryer in the X-axis direction in real time, and transmit the monitored motion frequency and motion amplitude in the X-axis direction to the control module;

[0019] The Y-axis motion frequency sensor and motion amplitude sensor of the vacuum dryer monitor the motion frequency and motion amplitude of the vacuum dryer in the Y-axis direction in real time, and transmit the monitored Y-axis motion frequency and motion amplitude to the control module;

[0020] The humidity sensor in the vacuum dryer monitors the humidity in the vacuum dryer in real time and transmits the monitored humidity value to the control module;

[0021] The control module receives, records and stores the movement frequency and movement amplitude of the vacuum dryer in the X-axis direction, the movement frequency and movement amplitude in the Y-axis direction, and the humidity value in the vacuum dryer;

[0022] The control module controls the movement frequency and movement amplitude of the vacuum dryer in the X-axis direction and the movement frequency and movement amplitude in the Y-axis direction according to the movement frequency and movement amplitude of the vacuum dryer in the X-axis direction, the movement frequency and movement amplitude in the Y-axis direction, and the humidity value in the vacuum dryer.

[0023] Furthermore, the specific implementation of evacuating the interior of the vacuum dryer includes:

[0024] The pressure sensor in the vacuum dryer monitors the pressure in the vacuum dryer in real time and transmits the monitored pressure value to the control module;

[0025] The control module receives, records and stores the data value transmitted by the pressure sensor in the vacuum dryer, and compares the received data value with the preset value. If the received data value is higher than the preset value, the control module controls the exhaust module to exhaust the vacuum dryer.

[0026] Furthermore, the specific implementation of unloading the slurry in the vacuum dryer includes:

[0027] The humidity sensor in the vacuum dryer monitors the humidity value in the vacuum dryer in real time and transmits the monitored data value to the control module;

[0028] The control module receives, records and stores the humidity value in the vacuum dryer, and compares the received humidity value with the preset value. When the received data value is less than or equal to the preset value, the control module controls the unloading module to unload the material in the vacuum dryer.

[0029] Furthermore, the specific implementation of recovering the hot air in the vacuum dryer includes:

[0030] The hot air recovery module monitors the recovery time and recovery flow of the gas extracted by the exhaust module in real time, and sends the monitored data values ​​to the control module;

[0031] The control module receives, records and stores the received hot air recovery time and recovery flow, and controls the recovery time and recovery flow of the hot air recovery module.

[0032] Furthermore, the specific implementation of recovering the hot oil in the vacuum dryer includes:

[0033] The hot oil recovery module monitors the recovery time and recovery flow of the heat transfer oil provided to the hot oil supply module in real time, and sends the monitored data values ​​to the control module;

[0034] The control module receives, records and stores the received hot oil recovery time and recovery flow, and controls the recovery time and recovery flow of the hot oil recovery module.

[0035] Furthermore, the specific implementation of heating and drying the material in the vacuum dryer includes:

[0036] The temperature sensor in the vacuum dryer monitors the temperature value in the vacuum dryer in real time and transmits the monitored data value to the control module;

[0037] The hot oil supply module monitors the temperature and flow of the provided thermal oil in real time and transmits the monitored data values ​​to the control module;

[0038] The control module receives, records and stores the temperature value inside the vacuum dryer, the temperature and flow of the thermal oil, and compares the received temperature value inside the vacuum dryer with the preset value. If the received temperature value inside the vacuum dryer is less than the preset value, the control module controls the temperature and flow of the thermal oil provided by the hot oil supply module.

[0039] Beneficial technical effects:

[0040] 1. The present invention discloses an automated vacuum drying process method, comprising the following steps: placing high-nickel ternary cathode material into a vacuum dryer; a control module controls a hot oil supply module to provide heat-conducting oil to heat and dry the material in the vacuum dryer; the control module controls the vacuum dryer to perform panning and tilting movements; the control module controls an exhaust module to evacuate the interior of the vacuum dryer; after drying is completed, the control module controls a discharge module to discharge the slurry in the vacuum dryer; the control module controls a hot air recovery module and a hot oil recovery module to recover the hot air and hot oil in the vacuum dryer; a drying quality test is performed on the product, and a control parameter is compared with a drying effect generation database and influencing factors, thereby solving the problem that the existing drying method for high-nickel ternary cathode material has poor drying effect and cannot ensure the consistency of the drying effect of the high-nickel ternary cathode material, realizing the automation of the drying of the high-nickel ternary cathode material, and effectively ensuring the consistency of the drying effect of the high-nickel ternary cathode material;

[0041] 2. In the automated vacuum drying process disclosed in the present invention, the control module controls the hot air recovery module to recover the hot air in the dryer, thereby recycling the hot air extracted from the vacuum dryer and realizing an efficient and energy-saving production mode;

[0042] 3. In the automated vacuum drying process disclosed in the present invention, the control module controls the hot oil recovery module to recover the heat transfer oil in the dryer, thereby realizing the circulating heating utilization of the oil and effectively saving energy;

[0043] 4. In the automated vacuum drying process method disclosed in the present invention, the drying process is monitored and controlled, and the real-time data of the reaction is recorded and stored. The real-time monitoring data is compared with the preset values. The control module controls each other module, and the quality of products of different batches can be compared to obtain the control parameter data of the optimal batch. Through data iteration, the optimal control parameters are obtained to obtain the optimal drying data. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for describing the embodiments.

[0045] Figure 1 The present invention provides a flowchart of the steps of an automated vacuum drying process. DETAILED DESCRIPTION

[0046] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0048] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0049] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0050] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0051] The present invention discloses an automated vacuum drying process, see Figure 1 , specifically including the following steps:

[0052] S1: Place the high nickel ternary cathode material into a vacuum dryer;

[0053] The amount of cathode material added is monitored in real time by a flow meter or weight meter or other detection device, and the time of addition is precisely adjusted by a control module to achieve precise control of the total amount of cathode material added;

[0054] Specifically, the material feeding module feeds the high-nickel ternary positive electrode material into the vacuum dryer, monitors the weight of the high-nickel ternary positive electrode material fed into the vacuum dryer in real time, and transmits the real-time monitored weight value of the high-nickel ternary positive electrode material fed into the vacuum dryer to the control module;

[0055] The control module receives, records and stores the weight of the high-nickel ternary positive electrode material delivered by the material delivery module, and compares the obtained weight of the delivered high-nickel ternary positive electrode material with the preset value to control the weight of the high-nickel ternary positive electrode material delivered by the material delivery module.

[0056] S2: The control module controls the hot oil supply module to provide heat transfer oil to heat and dry the materials in the vacuum dryer;

[0057] The vacuum dryer is mainly divided into three layers. The innermost layer is the silo, the second layer is the jacket, and the third layer is the insulation layer. The second jacket is filled with thermal oil to heat the silo. The function of the hot oil supply module is to fill the jacket with thermal oil to ensure the temperature in the silo and heat the positive electrode material.

[0058] Combined with the material properties and process requirements of the cathode material, thermal oil can be used as the heating medium. Temperature sensors can be used to monitor the temperature at multiple points in the vacuum dryer in real time, and the control module can be used to accurately adjust the heating temperature and hot oil flow rate to achieve an efficient, stable and controllable thermal oil delivery process.

[0059] Specifically, the hot oil supply module fills the jacket layer of the vacuum dryer with heat transfer oil, monitors the temperature and flow of the filled heat transfer oil in real time, and transmits the real-time monitored data values ​​to the control module;

[0060] The control module receives, records and stores the temperature and flow of the heat transfer oil filled in the hot oil supply module, compares them with the preset values, and controls the temperature and flow of the heat transfer oil filled in the hot oil supply module.

[0061] The temperature sensor in the vacuum dryer monitors the temperature value in the vacuum dryer in real time and transmits the monitored data value to the control module;

[0062] The hot oil supply module monitors the temperature and flow of the provided thermal oil in real time and transmits the monitored data values ​​to the control module;

[0063] The control module receives, records and stores the temperature value inside the vacuum dryer, the temperature and flow of the thermal oil, and compares the received temperature value inside the vacuum dryer with the preset value. If the received temperature value inside the vacuum dryer is less than the preset value, the control module controls the temperature and flow of the thermal oil provided by the hot oil supply module.

[0064] S3: The control module controls the vacuum dryer to perform rolling motion and pitching motion;

[0065] The vacuum dryer includes panning and tilting motions, and both panning and tilting motions are realized by multiple electric push rods. The panning frequency, panning amplitude, tilting frequency and tilting amplitude of the vacuum dryer are precisely controlled through the control module to ensure that the material drying effect meets the requirements;

[0066] Specifically, the vacuum dryer X-axis motion frequency sensor and motion amplitude sensor monitor the vacuum dryer's motion frequency and motion amplitude in the X-axis direction in real time, and transmit the monitored X-axis motion frequency and motion amplitude to the control module;

[0067] The Y-axis motion frequency sensor and motion amplitude sensor of the vacuum dryer monitor the motion frequency and motion amplitude of the vacuum dryer in the Y-axis direction in real time, and transmit the monitored Y-axis motion frequency and motion amplitude to the control module;

[0068] The humidity sensor in the vacuum dryer monitors the humidity in the vacuum dryer in real time and transmits the monitored humidity value to the control module;

[0069] The control module receives, records and stores the movement frequency and movement amplitude of the vacuum dryer in the X-axis direction, the movement frequency and movement amplitude in the Y-axis direction, and the humidity value in the vacuum dryer;

[0070] The control module controls the movement frequency and movement amplitude of the vacuum dryer in the X-axis direction and the movement frequency and movement amplitude in the Y-axis direction according to the movement frequency and movement amplitude of the vacuum dryer in the X-axis direction, the movement frequency and movement amplitude in the Y-axis direction, and the humidity value in the vacuum dryer.

[0071] S4: The control module controls the vacuum module to vacuum the inside of the vacuum dryer;

[0072] During the drying process, the vacuum dryer needs to maintain a negative pressure state continuously. Therefore, the vacuum dryer uses a pressure sensor to accurately monitor the pressure in the silo in real time. Preferably, the vacuum dryer is equipped with a pressure alarm system to prevent the gas from being discharged in time, resulting in excessive pressure inside the silo and damaging the equipment.

[0073] During the drying process, the vacuum pump and the pressure sensor inside the vacuum dryer are used together to keep the vacuum dryer in a negative pressure state. The air pressure state in the silo is precisely controlled by selecting the specifications of the vacuum pump, accurately controlling the pumping time, and feedback adjusting the pumping flow rate.

[0074] Specifically, the pressure sensor in the vacuum dryer monitors the pressure in the vacuum dryer in real time and transmits the monitored pressure value to the control module;

[0075] The control module receives, records and stores the data value transmitted by the pressure sensor in the vacuum dryer, and compares the received data value with the preset value. If the received data value is higher than the preset value, the control module controls the exhaust module to exhaust the vacuum dryer.

[0076] S5: After drying is completed, the control module controls the unloading module to unload the slurry in the vacuum dryer;

[0077] Unloading can realize regular unloading and emergency unloading. When the production task is completed normally, the cathode material in the vacuum dryer is extracted by the unloading pump, and the unloading speed is accurately adjusted by the control module to achieve an efficient and stable unloading process;

[0078] Specifically, the humidity sensor in the vacuum dryer monitors the humidity value in the vacuum dryer in real time and transmits the monitored data value to the control module;

[0079] The control module receives, records and stores the humidity value in the vacuum dryer, and compares the received humidity value with the preset value. When the received data value is less than or equal to the preset value, the control module controls the unloading module to unload the material in the vacuum dryer.

[0080] S6: The control module controls the hot air recovery module and the hot oil recovery module to recover the hot air and hot oil in the vacuum dryer;

[0081] The hot oil supply module in the vacuum dryer provides heat to evaporate the moisture in the material. To ensure that the vacuum dryer is in a negative pressure state, the hot water vapor is extracted by the exhaust module and then recycled by the hot air recovery module to heat the oil. By selecting the pump specifications, accurately controlling the hot air recovery time and feedback adjusting the hot air recovery flow rate, the hot air is stably recovered and precise control of the hot air recovery is achieved.

[0082] Specifically, the hot air recovery module monitors the recovery time and recovery flow of the gas extracted by the exhaust module in real time, and sends the monitored data values ​​to the control module;

[0083] The control module receives, records and stores the received hot air recovery time and recovery flow, and controls the recovery time and recovery flow of the hot air recovery module.

[0084] The hot oil supply module provides heat in the vacuum dryer. The oil that provides heat needs to be recovered by the hot oil recovery module and reheated for reuse to achieve oil recycling. By selecting pump specifications, accurately controlling the hot oil recovery time and feedback adjusting the hot oil recovery flow, the hot oil can be stably recovered and precise control of hot oil recovery can be achieved.

[0085] Specifically, the hot oil recovery module monitors the recovery time and recovery flow of the heat transfer oil provided to the hot oil supply module in real time, and sends the monitored data values ​​to the control module;

[0086] The control module receives, records and stores the received hot oil recovery time and recovery flow, and controls the recovery time and recovery flow of the hot oil recovery module.

[0087] S7: Test the drying quality of the product and compare the control parameters with the database generated by the drying effect and influencing factors.

[0088] Specifically, combined with the detection of product drying effects after production, the selection and control of all the above parameters and the drying effects are used to generate a database and compare the influencing factors. Through data iteration, the process engineering and parameter selection control can be secondary optimized to generate the optimal roll frequency, roll amplitude, pitch frequency, pitch amplitude and other parameters to provide data support for subsequent production.

[0089] The automated vacuum drying process method disclosed in the present invention monitors and controls the drying process, records and stores real-time reaction data, compares the real-time monitored data with preset values, controls each other module through a control module, and can obtain control parameter data for the optimal batch by comparing the quality of products from different batches. Through data iteration, the optimal control parameters are obtained, thereby obtaining the optimal drying data.

[0090] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0091] The above embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineers and technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. An automated vacuum drying process, characterized in that: The following steps are involved: Put the high nickel ternary cathode material into the vacuum dryer; The control module controls the hot oil supply module to provide heat-conducting oil to heat and dry the materials in the vacuum dryer; The control module controls the vacuum dryer to perform rolling motion and pitching motion; The control module controls the vacuum module to vacuum the interior of the vacuum dryer; After drying is completed, the control module controls the unloading module to unload the slurry in the vacuum dryer; The control module controls the hot air recovery module and the hot oil recovery module to recover the hot air and hot oil in the vacuum dryer; Test the drying quality of each batch of products, compare the parameters obtained by each module with the database generated by the drying quality test data and the influencing factors, iterate the data in the database to obtain the optimal drying data; The specific implementation of the roll motion and pitch motion of the vacuum dryer includes: The X-axis motion frequency sensor and motion amplitude sensor of the vacuum dryer monitor the motion frequency and motion amplitude of the vacuum dryer in the X-axis direction in real time, and transmit the monitored motion frequency and motion amplitude in the X-axis direction to the control module; The Y-axis motion frequency sensor and motion amplitude sensor of the vacuum dryer monitor the motion frequency and motion amplitude of the vacuum dryer in the Y-axis direction in real time, and transmit the monitored Y-axis motion frequency and motion amplitude to the control module; The humidity sensor in the vacuum dryer monitors the humidity in the vacuum dryer in real time and transmits the monitored humidity value to the control module; The control module receives, records and stores the movement frequency and movement amplitude of the vacuum dryer in the X-axis direction, the movement frequency and movement amplitude in the Y-axis direction, and the humidity value in the vacuum dryer; The control module controls the movement frequency and amplitude of the vacuum dryer in the X-axis direction and the movement frequency and amplitude of the vacuum dryer in the Y-axis direction according to the comparison between the movement frequency and amplitude of the vacuum dryer in the X-axis direction and the movement frequency and amplitude of the vacuum dryer in the Y-axis direction and the humidity value in the vacuum dryer and the corresponding preset values.

2. The automated vacuum drying process according to claim 1, wherein: The specific implementation of placing high nickel ternary cathode materials into the vacuum dryer includes: The material feeding module feeds the high-nickel ternary cathode material into the vacuum dryer, monitors the weight of the high-nickel ternary cathode material fed into the vacuum dryer in real time, and transmits the real-time monitored weight value of the high-nickel ternary cathode material fed into the vacuum dryer to the control module; The control module receives, records and stores the weight of the high-nickel ternary positive electrode material delivered by the material delivery module, and compares the obtained weight of the delivered high-nickel ternary positive electrode material with the preset value to control the weight of the high-nickel ternary positive electrode material delivered by the material delivery module.

3. The automated vacuum drying process according to claim 1, wherein: The specific implementation of vacuuming the interior of the vacuum dryer includes: The pressure sensor in the vacuum dryer monitors the pressure in the vacuum dryer in real time and transmits the monitored pressure value to the control module; The control module receives, records and stores the data value transmitted by the pressure sensor in the vacuum dryer, and compares the received data value with the preset value. If the received data value is higher than the preset value, the control module controls the exhaust module to exhaust the vacuum dryer.

4. The automated vacuum drying process according to claim 1, wherein: The specific implementation of unloading the slurry in the vacuum dryer includes: The humidity sensor in the vacuum dryer monitors the humidity value in the vacuum dryer in real time and transmits the monitored data value to the control module; The control module receives, records and stores the humidity value in the vacuum dryer, and compares the received humidity value with the preset value. When the received data value is less than or equal to the preset value, the control module controls the unloading module to unload the material in the vacuum dryer.

5. The automated vacuum drying process according to claim 1, wherein: The specific implementation of recycling hot air in the vacuum dryer includes: The hot air recovery module monitors the recovery time and recovery flow of the gas extracted by the exhaust module in real time, and sends the monitored data values ​​to the control module; The control module receives, records and stores the received hot air recovery time and recovery flow, and controls the recovery time and recovery flow of the hot air recovery module.

6. The automated vacuum drying process according to claim 1, wherein: The specific implementation of recovering hot oil in the vacuum dryer includes: The hot oil recovery module monitors the recovery time and recovery flow of the heat transfer oil provided to the hot oil supply module in real time, and sends the monitored data values ​​to the control module; The control module receives, records and stores the received hot oil recovery time and recovery flow, and controls the recovery time and recovery flow of the hot oil recovery module.

7. The automated vacuum drying process according to claim 1, wherein: The specific implementation of heating and drying the materials in the vacuum dryer includes: The temperature sensor in the vacuum dryer monitors the temperature value in the vacuum dryer in real time and transmits the monitored data value to the control module; The hot oil supply module monitors the temperature and flow of the provided thermal oil in real time and transmits the monitored data values ​​to the control module; The control module receives, records and stores the temperature value inside the vacuum dryer, the temperature and flow of the thermal oil, and compares the received temperature value inside the vacuum dryer with the preset value. If the received temperature value inside the vacuum dryer is less than the preset value, the control module controls the temperature and flow of the thermal oil provided by the hot oil supply module.

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