Moisture on-line monitoring system of positive electrode material vibration dryer

Abstract

The utility model discloses a moisture on-line monitoring system of a positive electrode material vibration drying machine. The moisture on-line monitoring system comprises a vibration drying machine and a moisture on-line detector arranged on the vibration drying machine, a probe of the online moisture detector comprises a temperature sensor and a microwave assembly, and the probe is inserted into a drying cavity of the vibration dryer; the signal processing unit is electrically connected with the temperature sensor, the microwave assembly and the vibration drying machine; the signal processing unit is used for calculating the moisture value of the materials in the drying cavity according to signal feedback of the microwave assembly, compensating the moisture value according to the detection value of the temperature sensor and adjusting the drying temperature of the vibration dryer according to the detection value of the temperature sensor. The moisture value can be compensated according to the detection value of the temperature sensor, the accuracy of real-time moisture detection is improved, meanwhile, the drying temperature of the vibration dryer can be adjusted according to the detection value of the temperature sensor, and it is ensured that the drying temperature is always kept in the optimal interval.

Description

Technical Field

[0001] The utility model relates to the technical field of positive electrode material preparation, and more specifically, to an online moisture monitoring system for a positive electrode material vibration dryer. Background Art

[0002] In the process of preparing nickel-cobalt-manganese ternary positive electrode materials, it is necessary to reduce the residual lithium in the material through a water washing process, and the washed material is dried to achieve the purpose of solid-liquid separation. The vacuum vibration dryer is an efficient, energy-saving, and uniformly dry solid-liquid separation equipment. Its basic principle is that the material enters the cylinder, and high-temperature steam is introduced into the jacket between the cylinder and the shell. Due to heat conduction, the cylinder is heated to vaporize the water in the material. At the same time, the excitation arm vibrates the cylinder, the vacuum system evacuates, and the dust removal system removes dust to complete the drying of the material.

[0003] The moisture content of the positive electrode material after drying is 0.1%-0.4%. Although the vacuum vibration dryer can efficiently complete the solid-liquid separation, it is unable to monitor the moisture content of the material online in real time. Usually, manual sampling and testing are used. The actual moisture content of the material measured by manual sampling is different from the expected value. The moisture detection is also the traditional drying and weighing method, which has a long detection time and a large hysteresis, which is not conducive to the real-time and accurate adjustment of the moisture content of the material. In addition, for the positive electrode material: when drying, there are temperature requirements, such as: usually 140 to 150 degrees Celsius, so it is necessary to keep the drying temperature stable during the drying process, but the existing vacuum vibration dryer is not equipped with a real-time temperature adjustment system, resulting in the inability to adjust the drying temperature according to the real real drying temperature feedback of the material, affecting the product quality of the positive electrode material.

[0004] Therefore, how to provide an online moisture monitoring system for a positive electrode material vibration dryer that can monitor the moisture content of the positive electrode material online and adjust the drying temperature of the vacuum vibration dryer in real time has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] The utility model aims to provide an online moisture monitoring system for a positive electrode material vibration dryer which can monitor the water content of the positive electrode material online and adjust the drying temperature of the vacuum vibration dryer in real time.

[0006] The utility model provides an online moisture monitoring system for a positive electrode material vibration dryer, comprising:

[0007] A vibration dryer, and an online moisture detector arranged on the vibration dryer;

[0008] The moisture online detector includes a probe located in the drying chamber of the vibration dryer, and the probe includes a temperature sensor and a microwave component; the microwave component can transmit and receive microwave signals;

[0009] The signal processing unit is electrically connected to the temperature sensor, the microwave component and the vibration dryer respectively; the signal processing unit is used to calculate the moisture value of the material in the drying chamber according to the signal feedback of the microwave component, compensate the moisture value according to the detection value of the temperature sensor, and adjust the drying temperature of the vibration dryer according to the detection value of the temperature sensor.

[0010] Optionally, a jacket for passing superheated steam is provided on the periphery of the drying chamber, and a solenoid valve is provided on the pipeline for conveying superheated steam to the jacket; the solenoid valve is electrically connected to the signal processing unit so that the solenoid valve can adjust the opening of the solenoid valve according to the temperature feedback of the signal processing unit.

[0011] Optionally, the probe is inserted into the drying chamber from the bottom of the vibration dryer.

[0012] Optionally, the length of the probe is 80 mm to 100 mm, and / or the diameter of the probe is 18 mm to 22 mm.

[0013] Optionally, the material of the probe includes alumina wear-resistant ceramics or polyimide.

[0014] Optionally, the online moisture detector includes a shell for installing the probe, the outer wall of the shell is provided with a flange connector, and the online moisture detector is installed on the vibration dryer through the flange connector.

[0015] Optionally, the material of the shell is selected from alumina wear-resistant ceramics or polyimide.

[0016] Optionally, the microwave component includes a microwave transmitting device and a microwave receiving device, the microwave transmitting device is arranged in the probe and is used to transmit microwave signals, and the microwave receiving device is used to receive reflected microwave signals reflected back by the material to be tested and transmit the reflected microwave signals to the signal processing unit.

[0017] Optionally, the online moisture detector further includes a waveguide component connected between the microwave receiving device and the signal processing unit, and the waveguide component is used to transmit the reflected microwave signal to the signal processing unit;

[0018] And / or, the online moisture detector further includes a temperature sensing wire connected between the temperature sensor and the signal processing unit.

[0019] Optionally, the online moisture detector further includes a display screen, which is electrically connected to the signal processing unit and exposed to the vibration dryer.

[0020] According to the technical content disclosed in the utility model, the following beneficial effects are achieved:

[0021] The utility model provides an online moisture monitoring system for a positive electrode material vibration dryer, comprising a temperature sensor, a microwave component and a signal processing unit, wherein the signal processing unit is electrically connected to the temperature sensor, the microwave component and the vibration dryer respectively; the signal processing unit is used to calculate the moisture value according to the signal feedback of the microwave component, and compensate the moisture value according to the detection value of the temperature sensor, thereby improving the accuracy of real-time moisture detection, and can also adjust the drying temperature of the vibration dryer according to the detection value of the temperature sensor, thereby ensuring that the drying temperature is always kept in an optimal range.

[0022] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0024] Figure 1 This is a structural diagram of the moisture online monitoring system of the positive electrode material vibration dryer of the utility model.

[0025] Figure 2 This is a structural diagram of the online moisture detector of the utility model.

[0026] Figure 3 This is the internal structure diagram of the online moisture detector of the utility model.

[0027] Figure 4 This is a working principle diagram of the online moisture detector of the utility model.

[0028] Explanation of the reference numerals: 1. Vibration dryer; 2. Online moisture detector; 3. Cylinder; 4. Probe; 5. Flange connector; 6. Meter head; 7. Data connector; 8. Temperature sensor; 9. Microwave component; 10. Waveguide component; 11. Temperature sensing wire. DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0031] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0032] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] See also Figure 1 This embodiment discloses an online moisture monitoring system for a positive electrode material vibration dryer, comprising: a vibration dryer 1, and an online moisture detector 2 arranged on the vibration dryer 1.

[0035] The vibration dryer 1 includes a cylinder 3 for storing materials. The cylinder 3 has a jacket for passing superheated steam outside to heat the cylinder 3 to dry the materials. The probe 4 of the online moisture detector 2 is located inside the cylinder 3. The probe 4 is used to detect the temperature of the material to obtain the temperature detection value and the moisture value of the moisture content of the material. In this application, the probe 4 extends into the drying chamber in the cylinder 3 to contact the material. It is a contact measurement, so it is to achieve a measurement accuracy of less than 0.1% moisture content, thereby meeting the detection of positive electrode materials with extremely high moisture requirements. In this embodiment, the online moisture detector 2 is inserted into the drying chamber inside the vibration dryer 1 at the bottom thereof, so that the online moisture detector 2 can fully contact the material in the drying chamber.

[0036] See also Figure 2 and Figure 3 The online moisture detector 2 includes a housing and a probe 4 disposed at the end of the housing. The housing has a housing cavity, and a waveguide component 10, a temperature sensing wire 11 and a single-chip microcomputer are disposed inside the housing cavity, and a signal processing unit is written inside the single-chip microcomputer; a temperature sensor 8 and a microwave component 9 are disposed inside the probe 4, wherein the microwave component 9 includes a microwave transmitting device and a microwave receiving device.

[0037] The temperature sensor 8 is used to detect the temperature of the material in the drying chamber and convert it into a usable temperature output signal, and transmit the temperature output signal to the signal processing unit through the temperature sensing wire 11 connected between the temperature sensor 8 and the signal processing unit, so that the signal processing unit can receive the signal feedback from the temperature sensor 8 and calculate the real-time drying temperature. Furthermore, in the present application, the signal processing unit can be a single-chip microcomputer with a built-in algorithm, based on which the single-chip microcomputer can perform temperature compensation according to the temperature output signal of the temperature sensor 8 and the actual working conditions. The specific algorithm can be implemented by known means and will not be described in detail here.

[0038] Further, the signal processing unit adjusts the drying temperature of the vibration dryer 1 according to the detection value of the temperature sensor 8. Specifically, the vibration dryer 1 also includes a pipeline for conveying superheated steam to the jacket, and a solenoid valve on the pipeline; the solenoid valve is electrically connected to the signal processing unit, so that the solenoid valve can adjust the opening of the solenoid valve according to the temperature feedback of the signal processing unit, thereby controlling the flow rate of the superheated steam to meet the predetermined water content requirement.

[0039] The microwave transmitting device is used to transmit microwave signals to the material, a part of the microwave signal is absorbed by the water molecules in the material, and the other part of the microwave signal passes through the material and is reflected back to the microwave receiving device; the waveguide component 10 is connected between the microwave receiving device and the signal processing unit, and is used to transmit the reflected microwave signal reflected by the material received by the microwave receiving device to the signal processing unit, and the signal processing unit calculates the moisture value according to the signal feedback of the microwave receiving device, and compensates the moisture value according to the detection value of the temperature sensor 8 (the reflected microwave signal at different temperatures is different, so it is necessary to compensate and calibrate the moisture value detected and calculated by the microwave component 9 and the signal processing unit according to the actual temperature conditions). The reflected microwave signal in this embodiment includes the resonant frequency and the peak width.

[0040] Furthermore, the length of the probe 4 is 80 mm to 100 mm, the diameter of the probe 4 is 18 mm to 22 mm, and the diameter is preferably 20 mm, so that it can have greater contact with the positive electrode material and have better moisture sensitivity, and the measurement accuracy can reach 0.01% (100 ppm) level.

[0041] Furthermore, the material of the probe 4 and the shell is selected from alumina wear-resistant ceramic or polyimide. Alumina wear-resistant ceramic is preferred. For the positive electrode material: when drying, there are temperature requirements, such as: usually 140 to 150 degrees Celsius, so the probe needs to be resistant to high temperatures; and the positive electrode material contains alkali, so the detection equipment needs to have corrosion resistance. When the probe surface is made of alumina wear-resistant ceramic, it can withstand the drying temperature of 100 to 150°C for the positive electrode material, and has good alkali corrosion resistance.

[0042] Furthermore, the housing is provided with a data transmission interface 7 for transmitting data to a computer for analysis, and the input end of the data transmission interface 7 is connected to the output end of the single chip computer. The outer wall of the housing is provided with a flange connector 5, and the online moisture detector 2 is installed on the cylinder of the vibration dryer 1 through the flange connector 5, so that the probe 4 is inserted into the drying chamber from the bottom of the drying chamber.

[0043] Furthermore, a display screen is provided on the housing, and the display screen is connected to the single chip microcomputer signal for real-time display of the moisture content of the material. The display screen is exposed to the vibration dryer 1.

[0044] Working principle:

[0045] See also Figure 4 , the material enters the cylinder 3 of the vibration dryer 1, and the cylinder 3 is heated by the hot steam in the jacket, and the material contacts the cylinder 3 for drying. During the drying process, the waveguide component 10 in the online moisture detector 2 transmits the microwave signal to the probe 4. The microwave signal emitted by the probe 4 passes through the material, and part of the microwave signal is absorbed by the water molecules in the material. Different moisture contents of the material will cause the total amount, frequency and phase of the microwave absorbed by the material to change. The microwave component 9 receives the reflected microwave signal and transmits it back to the customized chip in the header 6 of the online moisture detector 2 through the waveguide component. The temperature sensor 8 senses the temperature and converts it into a usable output signal, which is transmitted to the chip in the header by the temperature sensing wire 11 for temperature compensation. The chip accurately measures the moisture content of the material by detecting the microwave signal (resonance frequency, peak width) and temperature compensation. The moisture content value can be directly displayed on the display screen of the header, or it can be connected to the computer through the data connection port 7 to display, store and monitor the moisture content data.

[0046] In summary, the moisture online monitoring system of the positive electrode material vibration dryer provided by the utility model, by adding the moisture online detector 2, makes its probe emit microwave signals, the microwave component 9 receives the reflected microwave signals, and the waveguide component transmits the microwave signals to the customized chip, and the chip detects the microwave signals (resonance frequency, peak width) and temperature compensation to achieve real-time detection and feedback of the moisture content of the material. It solves the limitations of manual sampling detection and improves the drying timeliness.

[0047] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An online moisture monitoring system for a positive electrode material vibration dryer, characterized in that: include: A vibration dryer, and an online moisture detector arranged on the vibration dryer; The online moisture detector comprises a probe located in the drying chamber of the vibration dryer, the probe comprises a temperature sensor and a microwave component; the microwave component can transmit and receive microwave signals; A signal processing unit is electrically connected to the temperature sensor, the microwave component and the vibration dryer respectively; the signal processing unit is used to calculate the moisture value of the material in the drying chamber according to the signal feedback of the microwave component, compensate the moisture value according to the detection value of the temperature sensor, and adjust the drying temperature of the vibration dryer according to the detection value of the temperature sensor.

2. The moisture online monitoring system of the positive electrode material vibration dryer according to claim 1, characterized in that: A jacket for passing superheated steam is provided on the outer periphery of the drying chamber, and a solenoid valve is provided on the pipeline for conveying the superheated steam to the jacket; the solenoid valve is electrically connected to the signal processing unit so that the solenoid valve can adjust the opening of the solenoid valve according to the temperature feedback of the signal processing unit.

3. The moisture online monitoring system of the positive electrode material vibration dryer according to claim 1 or 2, characterized in that: The probe is inserted into the drying chamber from the bottom of the vibration dryer.

4. The online moisture monitoring system of the positive electrode material vibration dryer according to claim 1 or 2, characterized in that: The length of the probe is 80 mm to 100 mm, and / or the diameter of the probe is 18 mm to 22 mm.

5. The moisture online monitoring system of the positive electrode material vibration dryer according to claim 1 or 2, characterized in that: The material of the probe is selected from alumina wear-resistant ceramics or polyimide.

6. The moisture online monitoring system of the positive electrode material vibration dryer according to claim 1 or 2, characterized in that: The online moisture detector comprises a shell for mounting the probe, the outer wall of the shell is provided with a flange connector, and the online moisture detector is mounted on the vibration dryer via the flange connector.

7. The online moisture monitoring system of the positive electrode material vibration dryer according to claim 6, characterized in that: The material of the shell includes alumina wear-resistant ceramic or polyimide.

8. The online moisture monitoring system of the positive electrode material vibration dryer according to claim 1 or 2, characterized in that: The microwave assembly includes a microwave transmitting device and a microwave receiving device. The microwave transmitting device is arranged in the probe and is used to transmit microwave signals. The microwave receiving device is used to receive reflected microwave signals reflected by the material to be tested and transmit the reflected microwave signals to the signal processing unit.

9. The online moisture monitoring system of the positive electrode material vibration dryer according to claim 8, characterized in that: The online moisture detector further comprises a waveguide component connected between the microwave receiving device and the signal processing unit, wherein the waveguide component is used to transmit the reflected microwave signal to the signal processing unit; And / or, the online moisture detector further includes a temperature sensing wire connected between the temperature sensor and the signal processing unit.

10. The online moisture monitoring system of the positive electrode material vibration dryer according to claim 1 or 2, characterized in that: The online moisture detector also includes a display screen, which is electrically connected to the signal processing unit and exposed to the vibration dryer.

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