Electrolytic bath temperature control system for high-precision aluminum plate ingot production

Abstract

The utility model discloses an electrolytic bath temperature control system for high-precision aluminum plate ingot production, relates to the technical field of high-precision aluminum plate ingot production, and mainly aims to monitor the temperature change of each key part of an aluminum electrolytic bath and pre-judge the damage position and the damage degree in the electrolytic bath. According to the main technical scheme, the electrolytic bath temperature control system for high-precision aluminum plate ingot production comprises a pulse light source, a wavelength division multiplexer, a photodiode, an amplifying circuit, a digital-to-analog conversion module, a reference optical fiber, an optical switch and a multimode optical fiber, and the output end of the pulse light source is connected to the input end of the wavelength division multiplexer; the first output end of the wavelength division multiplexer, the reference optical fiber, the optical switch and the multimode optical fiber are connected in sequence, and the second output end of the wavelength division multiplexer, the photodiode, the amplification circuit and the input end of the digital-to-analog conversion module are connected in sequence; the first output end of the digital-to-analog conversion module is connected to the input end of the pulse light source.

Description

Technical Field

[0001] The utility model relates to the technical field of high-precision aluminum plate ingot production, in particular to an electrolytic cell temperature control system for high-precision aluminum plate ingot production. Background Art

[0002] Due to the strong magnetic field, high temperature environment and strong corrosiveness of hydrofluoric acid in the electrolytic cell, it is very difficult to achieve long-term and accurate temperature monitoring and control of the aluminum electrolytic cell. How to accurately and real-time monitor and control the temperature of the electrolytic cell and achieve real-time monitoring and control of the electrolytic cell status has long been a difficult problem that needs to be solved at home and abroad. By monitoring and controlling the temperature of the electrolytic cell, the damaged part and degree of the electrolytic cell can be correctly judged, safety hazards can be eliminated, production capacity can be increased, and economic benefits can be improved.

[0003] At present, the temperature monitoring and control mode of the electrolytic cell is complicated, time-consuming and costly. The traditional electrolytic cell temperature control system has weak anti-electromagnetic interference ability, poor corrosion resistance, small temperature measurement range, and cannot perform real-time temperature monitoring and control. Workers use handheld infrared temperature measuring guns to measure the temperature of the shell, steel bars, bottom and wall of the electrolytic cell in different areas and points and make special records. The workload is huge, the human factor has a great impact, the data storage and analysis are complicated, and there are certain safety hazards. Utility Model Content

[0004] In view of this, the utility model provides an electrolytic cell temperature control system for high-precision aluminum plate ingot production, the main purpose of which is to monitor the temperature changes of key parts of the aluminum electrolytic cell and predict the damage position and degree of damage in the electrolytic cell.

[0005] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0006] The utility model provides an electrolytic cell temperature control system for producing high-precision aluminum plate ingots. The system comprises: a pulse light source, a wavelength division multiplexer, a photodiode, an amplifier circuit, a digital-to-analog conversion module, a reference optical fiber, an optical switch and a multimode optical fiber. The output end of the pulse light source is connected to the input end of the wavelength division multiplexer, the first output end of the wavelength division multiplexer, the reference optical fiber, the optical switch and the multimode optical fiber are connected in sequence, the second output end of the wavelength division multiplexer, the photodiode, the amplifier circuit and the input end of the digital-to-analog conversion module are connected in sequence, and the first output end of the digital-to-analog conversion module is connected to the input end of the pulse light source.

[0007] The purpose of the utility model and the solution to its technical problems can also be further achieved by adopting the following technical measures.

[0008] Optionally, it also includes a high-speed data acquisition card and a PLC controller, wherein the input end of the high-speed data acquisition card is respectively connected to the second output end of the digital-to-analog conversion module and the reference optical fiber, the output end of the high-speed data acquisition card is connected to the input end of the PLC controller, and the output end of the PLC controller is respectively connected to the optical switch and the pulse light source.

[0009] Optionally, the pulse light source includes a laser and a fiber amplifier, the laser, the fiber amplifier and the input end of the wavelength division multiplexer are connected in sequence, and the first output end of the digital-to-analog conversion module and the output end of the PLC controller are respectively connected to the laser.

[0010] Optionally, the multimode optical fiber is laid outside the electrolytic cell.

[0011] Optionally, a touch screen is also included, and the touch screen is connected to the PLC controller.

[0012] Optionally, it also includes a power supply unit, which includes an air switch, a transformer and a rectifier connected in sequence.

[0013] Optionally, the output end of the PLC controller is connected to an electrolytic cell current regulator.

[0014] By means of the above technical solution, the utility model has at least the following advantages:

[0015] After the acquisition program of the PLC host computer is started, the pulse light source emits pulse light with a certain pulse width and repetition frequency. The pulse light enters the wavelength division multiplexer and then passes through the reference optical fiber. The function of the optical switch is to increase the sensing channel and transmission distance. The pulse light generates backward Raman scattering in the reference optical fiber. The Raman scattered light will return to the Com end of the wavelength division multiplexer along the reference optical fiber. The Raman scattered light is filtered into Stokes light and anti-Stokes light through the wavelength division multiplexer. The two optical signals are transmitted to the photodiode. When the photodiode detects two weak optical signals, it will perform photoelectric conversion and amplification on the Stokes light and the Anti-Stokes light.

[0016] Compared with the existing technology, the advantages of this system are as follows:

[0017] (1) The temperature of the aluminum electrolytic cell is monitored by the temperature measuring mechanism. It only needs to lay the multimode optical fiber on the side wall of the electrolytic cell. The optical fiber can transmit signals in a strong magnetic field environment and is more suitable for high-temperature monitoring of the aluminum electrolytic cell. Compared with the traditional monitoring method, it better overcomes the shortcomings of the traditional method, such as low degree of automation, great influence by environmental factors, unsafe and discontinuous measurement, difficult preservation of measurement data, and high labor cost.

[0018] (2) In the automatic mode, the electrolytic cell temperature control device for high-precision aluminum ingot production automatically sets the parameters according to the electrolytic aluminum information input by the user, and automatically sets the temperature and time for electrolytic aluminum operation;

[0019] (3) The temperature measurement mechanism and the high-speed data acquisition card are used to collect temperature information. Each mode displays the real-time temperature information of the electrolytic cell for high-precision aluminum plate ingot production on the human-computer interaction interface, and different alarm temperatures can be set for temperature monitoring, making the alarm method more flexible;

[0020] (4) With the function of recording historical data, the human-computer interaction device can send data to the cloud server, and the operator can view it directly from the human-computer interaction device or the cloud. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a temperature measuring mechanism provided in an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the structure of a temperature control system for an electrolytic cell used in the production of high-precision aluminum plate ingots provided in an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of the structure of a power supply unit provided in an embodiment of the utility model;

[0024] Figure 4 Schematic diagram of the installation position of multimode optical fiber on the wall of the electrolytic cell.

[0025] The figure marks in the drawings of the specification include: pulse light source 1, wavelength division multiplexer 2, photodiode 3, amplifier circuit 4, digital-to-analog conversion module 5, reference optical fiber 6, optical switch 7, multimode optical fiber 8, high-speed data acquisition card 9, PLC controller 10, laser 101, optical fiber amplifier 102, touch screen 11, power supply unit 12, air switch 1201, transformer 1202, rectifier 1203, temperature measuring mechanism 13, current regulator 14, electrolytic cell 15. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation methods, structures, features and effects of the utility model application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides an electrolytic cell temperature control system for producing high-precision aluminum plate ingots, which includes: a pulse light source 1, a wavelength division multiplexer 2, a photodiode 3, an amplifier circuit 4, a digital-to-analog conversion module 5, a reference optical fiber 6, an optical switch 7 and a multimode optical fiber 8, the output end of the pulse light source 1 is connected to the input end of the wavelength division multiplexer 2, the first output end of the wavelength division multiplexer 2, the reference optical fiber 6, the optical switch 7 and the multimode optical fiber 8 are connected in sequence, the second output end of the wavelength division multiplexer 2, the photodiode 3, the amplifier circuit 4, and the input end of the digital-to-analog conversion module 5 are connected in sequence, and the first output end of the digital-to-analog conversion module 5 is connected to the input end of the pulse light source 1.

[0029] The working process of the electrolytic cell temperature control system for high-precision aluminum ingot production is as follows:

[0030] After the acquisition program of the PLC host computer is started, the pulse light source 1 emits pulse light with a certain pulse width and repetition frequency. The pulse light enters the wavelength division multiplexer 2 and then passes through the reference optical fiber 6. The function of the optical switch is to increase the sensing channel and transmission distance. The pulse light generates backward Raman scattering in the reference optical fiber 6. The Raman scattered light will return to the Com end of the wavelength division multiplexer 2 along the reference optical fiber 6. The Raman scattered light is filtered into Stokes light and anti-Stokes light through the wavelength division multiplexer 2. The two optical signals are transmitted to the photodiode 3. When the photodiode 3 detects two weak optical signals, it will perform photoelectric conversion and amplification on the Stokes light and the Anti-Stokes light.

[0031] In the technical solution of the utility model, the advantages of this system are as follows:

[0032] (1) The temperature of the aluminum electrolytic cell 15 is monitored by the temperature measuring mechanism 13. It is only necessary to lay the multimode optical fiber 8 on the side wall of the electrolytic cell 15. The optical fiber can transmit signals in a strong magnetic field environment, which is more suitable for high-temperature monitoring of the aluminum electrolytic cell 15. Compared with the traditional monitoring method, it better overcomes the shortcomings of the traditional method, such as low degree of automation, great influence by environmental factors, unsafe and discontinuous measurement, difficult preservation of measurement data, and high labor cost.

[0033] (2) In the automatic mode, the temperature control device of the electrolytic cell 15 for producing high-precision aluminum ingots automatically sets the parameters according to the electrolytic aluminum information input by the user, and automatically sets the temperature and time for electrolytic aluminum operation;

[0034] (3) The temperature measuring mechanism 13 and the high-speed data acquisition card 9 are used to collect temperature information. Each mode displays the real-time temperature information of the electrolytic cell 15 for high-precision aluminum plate ingot production on the human-computer interaction interface, and different alarm temperatures can be set for temperature monitoring, and the alarm mode is more flexible;

[0035] (4) With the function of recording historical data, the human-computer interaction device can send data to the cloud server, and the operator can view it directly from the human-computer interaction device or the cloud.

[0036] like Figure 1 and Figure 2 As shown, in a specific implementation, it also includes a high-speed data acquisition card 9 and a PLC controller 10, the input end of the high-speed data acquisition card 9 is respectively connected to the second output end of the digital-to-analog conversion module 5 and the reference optical fiber 6, the output end of the high-speed data acquisition card 9 is connected to the input end of the PLC controller 10, and the output end of the PLC controller 10 is respectively connected to the optical switch 7 and the pulse light source 1.

[0037] In this embodiment, specifically, the high-speed data acquisition card 9 is used to perform digital-to-analog conversion and preprocess the signal, convert the anti-Stokes light signal and the Stokes scattered light signal output by the photodiode 3 into digital signals and transmit them to the PLC.

[0038] like Figure 1 As shown, in a specific implementation, the pulse light source 1 includes a laser 101 and an optical fiber amplifier 102, the laser 101, the optical fiber amplifier 102 and the input end of the wavelength division multiplexer 2 are connected in sequence, and the first output end of the digital-to-analog conversion module 5 and the output end of the PLC controller 10 are respectively connected to the laser 101.

[0039] In this embodiment, specifically, when the acquisition program of the PLC controller 10 is started, the acquisition module is prompted to send a pulse trigger signal, triggering the laser 101 to emit pulse light with a certain pulse width and repetition frequency, which is amplified by the optical fiber amplifier 102 and enters the wavelength division multiplexer 2, and then enters the reference optical fiber 6.

[0040] like Figure 4 As shown, in a specific implementation, the multimode optical fiber 8 is laid outside the electrolytic cell 15 .

[0041] In this embodiment, the multimode optical fiber 8 is laid on the outside of the electrolytic cell 15 to obtain the temperature changes of the cell shell, cell wall and cathode square steel of the electrolytic cell 15, predict and determine the damage location and degree of damage inside the electrolytic cell 15, extend the service life of the electrolytic cell 15, reduce the downtime caused by the damage of the electrolytic cell 15, reduce the occurrence of safety accidents, reduce labor costs, and avoid unnecessary risks in advance.

[0042] like Figure 1 As shown, in a specific implementation, a touch screen 11 is also included, and the touch screen 11 is connected to the PLC controller 10.

[0043] In this embodiment, specifically, the touch screen 11 records important data of each electrolysis, such as temperature, current, voltage, time, etc., and sends these data to the cloud server for storage, solving the problem that the temperature monitoring and control mode of the traditional electrolytic cell 15 is complicated, time-consuming and costly.

[0044] Specifically, the PLC communicates with the touch screen 11 via RS232, and the touch screen 11 sends control instructions to the PLC via the communication protocol.

[0045] The PLC receives control instructions and temperature signals, and stores the data in the PLC internal memory; the touch screen 11 serves as a human-computer interaction interface, allowing the operator to input control instructions and monitor the equipment status. Through the communication protocol, the touch screen 11 sends control instructions to the PLC, which include starting or stopping the equipment, adjusting process parameters, etc. At the same time, the touch screen 11 can also display feedback information from the PLC, such as equipment status, alarm information, real-time data and trend charts, etc.; the PLC will analyze the temperature signal according to the preset control logic and the control instructions input by the operator through the touch screen 11 based on the parameters entered by the user and the signal collected by the temperature measuring mechanism 13, and adjust the temperature of the electrolytic cell 15 for the production of high-precision aluminum plate ingots accordingly. During the electrolytic aluminum process, the PLC will automatically adjust the current of the electrolytic cell 15 according to the target temperature and time information entered by the user to ensure accurate control of the production process.

[0046] The touch screen 11 includes two modes of human-computer interaction: automatic mode and manual mode. Each mode displays the real-time temperature information on the electrolytic cell 15 for high-precision aluminum plate ingot production on the human-computer interaction interface, and can monitor the temperature change of the aluminum electrolytic cell 15 for a long time and stably control the high temperature; in the automatic mode, the temperature control cabinet of the electrolytic cell 15 for high-precision aluminum plate ingot production automatically sets the parameters according to the electrolytic aluminum information input by the user, and automatically sets the temperature and time for electrolytic aluminum operation; in the manual mode, the user needs to manually control the electrolytic cell 15 for high-precision aluminum plate ingot production according to his own experience to electrolyze the aluminum located on the electrolytic cell 15, and control the temperature and time of electrolysis through the touch screen 11; after the electrolysis is completed, the touch screen 11 will record the important data of each electrolysis, such as temperature, current, voltage, time, etc., and send these data to the cloud server for storage. The touch screen 11 also includes emergency stop and historical data storage functions. In this way, the operator can not only view historical data and analysis reports on the spot through the touch screen 11 device, but also remotely log in to the cloud server to monitor the production process and adjust process parameters anywhere there is a network connection. The design of the entire system ensures the automation and high efficiency of the production process, while also improving the security and traceability of data. In this way, companies can better manage production data, optimize production processes, improve product quality, and reduce production costs.

[0047] like Figure 3 As shown, in a specific implementation, a power supply unit 12 is also included, and the power supply unit 12 includes an air switch 1201, a transformer 1202 and a rectifier 1203 connected in sequence.

[0048] In this embodiment, specifically, the transformer 1202 converts the external 380V AC power into 220V AC power, and the rectifier 1203 converts the 220V AC power into 24V DC power to power the touch screen 11, the high-speed data acquisition card 9, the PLC controller 10, and the temperature measurement mechanism 13.

[0049] Specifically, the temperature measuring mechanism 13 is composed of the aforementioned laser 101 , the optical fiber amplifier 102 , the wavelength division multiplexer 2 , the photodiode 3 , the amplifier circuit 4 , the digital-to-analog conversion module 5 , the reference optical fiber 6 , the optical switch 7 and the multimode optical fiber 8 .

[0050] like Figure 2 As shown, in a specific embodiment, the output end of the PLC controller 10 is connected to the current regulator 14 of the electrolytic cell 15 .

[0051] In this embodiment, specifically, the PLC controller 10 receives the analog signal input through the touch screen 11 and the data transmitted by the high-speed data acquisition card 9, and controls the current regulator 14 of the electrolytic cell 15. The current value of the electrolyte in the electrolytic cell 15 is adjusted to control the heat generated during the electrolysis process, so as to control the temperature of the electrolytic cell 15.

[0052] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A temperature control system for an electrolytic cell used in the production of high-precision aluminum ingots, characterized in that: include: A pulse light source, a wavelength division multiplexer, a photodiode, an amplifier circuit, a digital-to-analog conversion module, a reference optical fiber, an optical switch and a multimode optical fiber, wherein the output end of the pulse light source is connected to the input end of the wavelength division multiplexer, the first output end of the wavelength division multiplexer, the reference optical fiber, the optical switch and the multimode optical fiber are connected in sequence, the second output end of the wavelength division multiplexer, the photodiode, the amplifier circuit and the input end of the digital-to-analog conversion module are connected in sequence, and the first output end of the digital-to-analog conversion module is connected to the input end of the pulse light source.

2. The electrolytic cell temperature control system for producing high-precision aluminum plate ingots according to claim 1 is characterized in that: It also includes a high-speed data acquisition card and a PLC controller, wherein the input end of the high-speed data acquisition card is respectively connected to the second output end of the digital-to-analog conversion module and the reference optical fiber, the output end of the high-speed data acquisition card is connected to the input end of the PLC controller, and the output end of the PLC controller is respectively connected to the optical switch and the pulse light source.

3. The electrolytic cell temperature control system for producing high-precision aluminum plate ingots according to claim 2 is characterized in that: The pulse light source comprises a laser and an optical fiber amplifier. The laser, the optical fiber amplifier and the input end of the wavelength division multiplexer are connected in sequence. The first output end of the digital-to-analog conversion module and the output end of the PLC controller are respectively connected to the laser.

4. The electrolytic cell temperature control system for producing high-precision aluminum plate ingots according to any one of claims 1 to 3, characterized in that: The multimode optical fiber is laid outside the electrolytic cell.

5. The electrolytic cell temperature control system for producing high-precision aluminum plate ingots according to claim 2 is characterized in that: It also includes a touch screen, which is connected to the PLC controller.

6. The electrolytic cell temperature control system for producing high-precision aluminum plate ingots according to any one of claims 1 to 3, characterized in that: It also includes a power supply unit, which includes an air switch, a transformer and a rectifier connected in sequence.

7. The electrolytic cell temperature control system for producing high-precision aluminum plate ingots according to claim 2 is characterized in that: The output end of the PLC controller is connected to the electrolytic cell current regulator.

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