Aluminum electrolysis cell bottom temperature measurement system and temperature measurement method thereof

Abstract

The invention discloses an aluminum electrolysis cell bottom temperature measurement system and a temperature measurement method thereof.The temperature measurement system comprises an infrared thermometer, a holder, a processor and a reflector, the infrared thermometer is installed on the holder and arranged on one side of an electrolysis cell, the infrared thermometer is in communication connection with the processor, and the reflector is installed on a vertical plate on the side face of a cradle frame of the electrolysis cell; and the electrolytic bath is provided with a temperature measuring port which is arranged between the vertical plates on the side surfaces of the adjacent cradle frames. According to the temperature measuring method, the infrared thermometer can receive infrared radiation, reflected by the reflector, of the temperature measuring port by adjusting the angles of the holder and the reflector, so that the temperature of the bottom of the electrolytic cell is monitored, heat radiation has certain divergence, an error model is established, and the accuracy of the calibration temperature T is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of aluminum electrolysis, and in particular to a temperature measurement system and method for measuring the bottom of an aluminum electrolysis cell. Background Art

[0002] When an electrolytic cell reaches the end of its service life, the aluminum smelter will shut it down for overhaul. This will interrupt the cell's production and affect aluminum output. Especially when aluminum prices are high, shutting down the cell can cause significant losses to the smelter. To minimize these losses, the life of the cell should be extended as much as possible.

[0003] However, since the lifespan of an electrolytic cell cannot be accurately predicted, prematurely shutting down an electrolytic cell nearing the end of its service life will result in certain economic losses, while continued use may pose safety risks such as leakage. Therefore, effective temperature monitoring of the cathode area, which is prone to leakage, and providing early warning of temperature anomalies are effective means of simultaneously reducing economic losses and safety hazards when an electrolytic cell nears the end of its service life. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides an aluminum electrolytic cell bottom temperature measurement system and a temperature measurement method thereof, which monitors the bottom temperature of the cell and ensures accurate temperature monitoring by establishing an error model, thereby reducing the occurrence of electrolytic cell leakage accidents.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a temperature measurement system for the bottom of an aluminum electrolytic cell, comprising an infrared thermometer, a pan-tilt platform, a processor and a reflector, wherein the infrared thermometer is mounted on the pan-tilt platform and arranged on one side of the electrolytic cell, the infrared thermometer is communicatively connected to the processor, the reflector is mounted on the side vertical plate of the cradle of the electrolytic cell, the electrolytic cell is provided with a temperature measuring port, and the temperature measuring port is arranged between adjacent side vertical plates of the cradle; the reflector comprises two electric telescopic rods, a fixed rod, a universal joint and a reflective plate, one end of the fixed rod is fixedly connected to the side vertical plate of the cradle, and the other end is fixedly connected to the universal joint and the universal joint is connected to the bottom of the reflective plate, the fixed end of the electric telescopic rod is hinged to the fixed rod, the protruding end of the electric telescopic rod is connected to the ball joint at the bottom of the reflective plate, and the projection of the axis of the two electric telescopic rods on the horizontal plane forms a 90° angle.

[0006] Furthermore, the measuring range of the infrared thermometer is 200°C to 1000°C, and the object distance ratio is 200:1.

[0007] Furthermore, the control accuracy of the pan / tilt platform is 0.05° to 0.1°.

[0008] A temperature measurement method using the above temperature measurement system comprises the following steps:

[0009] S1, adjust the position of the infrared thermometer and the reflector so that the auxiliary laser of the infrared thermometer is reflected by the reflector to the temperature measuring port, and record the pan / tilt angle and the corresponding reflector number on the side plate of the cradle frame;

[0010] S2, establish an error model. By simultaneously measuring the reflected temperature T0 of the reflector and the actual measured temperature T1 of the measuring port, calibrate the temperature correction formula T=δT0+ΔT1, where T is the calibration temperature, and the values of δ and Δ are determined by collecting T0 and T1 at different temperature measuring ports through linear regression;

[0011] S3, regularly rotate the pan / tilt table so that the infrared thermometer measures the temperature T0 of each reflector in turn. The temperature T1 is the first actual measurement temperature. There is no need to perform multiple actual measurements. The calibration temperature T is obtained after correction.

[0012] Furthermore, the method further includes step S4, setting a threshold temperature T2. When the calibration temperature T exceeds the threshold temperature T2, an alarm is issued. The threshold temperature T2 is 90% of the upper temperature limit of the electrolytic cell bottom material.

[0013] Beneficial effects of the present invention:

[0014] 1. By adjusting the pan / tilt and reflector angles, the infrared thermometer can receive the infrared radiation from the temperature measuring port reflected by the reflector, thereby realizing the monitoring of the bottom temperature of the electrolytic cell; and two electric telescopic rods and universal joints are set, and the multi-angle adjustment of the reflector can be realized by the telescopic movement of the electric telescopic rods in different directions.

[0015] 2. The reflection of thermal radiation by the reflector is used to monitor points that cannot be directly detected. Thermal radiation has a certain divergence, so an error model is established to ensure the accuracy of the calibration temperature T. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings:

[0017] Figure 1 It is a working schematic diagram of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the reflector of the present invention;

[0019] In the figure: 1. Infrared thermometer; 2. Pan / tilt; 3. Processor; 4. Electrolytic cell; 5. Cradle stand; 6. Temperature measuring port; 7. Reflector; 8. Electric telescopic rod; 9. Fixed rod; 10. Universal joint. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0021] The following specific embodiments are used to describe the technical solution of the present invention in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0022] Example 1

[0023] like Figures 1 to 2 As shown, the present invention provides a temperature measurement system for the bottom of an aluminum electrolytic cell, comprising an infrared thermometer 1, a pan-tilt head 2, a processor 3 and a reflector, wherein the infrared thermometer 1 is mounted on the pan-tilt head 2 and arranged on one side of the electrolytic cell 4, the infrared thermometer 1 is communicatively connected to the processor, the reflector is mounted on the side vertical plate 5 of the cradle of the electrolytic cell 4, the electrolytic cell 4 is provided with a temperature measuring port 6, and the temperature measuring port 6 is arranged between adjacent side vertical plates 5 of the cradle; the reflector comprises two electric telescopic rods 8, a fixed rod 9, a universal joint 10 and a reflective plate 7, one end of the fixed rod 9 is fixedly connected to the side vertical plate 5 of the cradle, and the other end is fixedly connected to the universal joint 10, and the universal joint 10 is connected to the bottom of the reflective plate 7, the fixed end of the electric telescopic rod 8 is hinged to the fixed rod 9, the protruding end of the electric telescopic rod 8 is connected to the ball pair at the bottom of the reflective plate 7, and the projection of the axes of the two electric telescopic rods 8 on the horizontal plane forms an angle of 90°.

[0024] By adjusting the pan-tilt head 2 and the reflector angle, the infrared thermometer 1 can receive the infrared radiation of the temperature measuring port 6 reflected by the reflector, thereby realizing monitoring of the bottom temperature of the electrolytic cell 4; the reflective plate 7 is made of mirror-polished stainless steel to realize reflection of thermal radiation and reduce thermal radiation absorption; and the angle is adjusted by the cooperation of two 90° electric telescopic rods 8, each electric retractable rod 8 realizes the adjustment of a plane angle, when one is working and the other is not working, it is the rotation of the plane angle, when the two work at the same time, the two are used together to realize the adjustment of the spatial angle, and in conjunction with the use of the universal joint 10, the reflective plate 7 can be rotated in the space around the center point of the universal joint 10, so as to realize the adjustment of the reflective plate 7 corresponding to the detection range of the infrared thermometer 1.

[0025] Specifically, the infrared thermometer 1 has a measurement range of 200°C to 1000°C and a distance-to-object ratio of 200:1. The pan / tilt head 2 has a control accuracy of 0.05° to 0.1°. The high-precision pan / tilt head 2 ensures precise angle adjustment and is dust-proof and heat-resistant.

[0026] The temperature measurement method of the temperature measurement system includes the following steps:

[0027] S1, adjust the position of the infrared thermometer 1 and the reflector so that the auxiliary laser of the infrared thermometer 1 is reflected by the reflector to the temperature measuring port 6, and record the angle of the pan / tilt head 2 and the corresponding reflector number on the side plate 5 of the cradle frame;

[0028] S2, establish an error model. By simultaneously measuring the reflected temperature T0 of the reflector and the actual measured temperature T1 directly measured at the measuring port 6, calibrate the temperature correction formula T=δT0+ΔT1, where T is the calibration temperature, and the values of δ and Δ are determined by linear regression by collecting T0 and T1 at different temperature measuring ports 6;

[0029] S3, regularly rotate the pan / tilt platform 2 so that the infrared thermometer 1 measures the temperature T0 of each reflector in turn. The temperature T1 is the first actual measurement temperature. There is no need to perform multiple actual measurements. The calibration temperature T is obtained after correction.

[0030] The reflection of thermal radiation by the reflector is used to monitor points that cannot be directly detected. Thermal radiation has a certain divergence, so an error model is established to ensure the accuracy of the calibration temperature T.

[0031] Furthermore, step S4 is included, where a threshold temperature T2 is set. When the calibrated temperature T exceeds the threshold temperature T2, an alarm is issued. The threshold temperature T2 is 90% of the upper temperature tolerance limit of the electrolytic cell bottom material. Process personnel use this temperature information to determine the use of the electrolytic cell 4 and make decisions, especially for high-risk cells. Process personnel can use this temperature information to determine whether to stop the cell.

[0032] In addition to the above-mentioned preferred embodiments, the present invention has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A temperature measurement system for the bottom of an aluminum electrolysis cell, characterized in that: The invention comprises an infrared thermometer (1), a pan-tilt platform (2), a processor (3) and a reflector, wherein the infrared thermometer (1) is mounted on the pan-tilt platform (2) and arranged on one side of the electrolytic cell (4), the infrared thermometer (1) is communicatively connected to the processor, the reflector is mounted on a side vertical plate (5) of the cradle of the electrolytic cell (4), the electrolytic cell (4) is provided with a temperature measuring port (6), and the temperature measuring port (6) is arranged between adjacent side vertical plates (5) of the cradle; the reflector comprises two electric telescopic rods (8), a fixed rod (9), a universal joint (10) and a reflective plate (7), wherein one end of the fixed rod (9) is fixedly connected to the side vertical plate (5) of the cradle frame, and the other end is fixedly connected to the universal joint (10), and the universal joint (10) is connected to the bottom of the reflective plate (7), the fixed end of the electric telescopic rod (8) is hinged to the fixed rod (9), and the extended end of the electric telescopic rod (8) is connected to the ball joint at the bottom of the reflective plate (7), and the projections of the axes of the two electric telescopic rods (8) on the horizontal plane form an angle of 90 degrees.

2. The aluminum electrolysis cell bottom temperature measurement system according to claim 1, characterized in that: The measuring range of the infrared thermometer (1) is 200°C to 1000°C, and the object distance ratio is 200:

1.

3. The aluminum electrolysis cell bottom temperature measurement system according to claim 1, characterized in that: The control accuracy of the pan / tilt platform (2) is 0.05° to 0.1°.

4. A temperature measurement method using the temperature measurement system according to any one of claims 1 to 3, characterized in that: The steps include: S1, adjust the positions of the infrared thermometer (1) and the reflector so that the auxiliary laser of the infrared thermometer (1) is reflected by the reflector to the temperature measuring port (6), and record the angle of the pan / tilt table (2) and the corresponding reflector number on the side plate (5) of the cradle frame; S2, establish the error model, by simultaneously measuring the reflected temperature T0 of the reflector and the actual measured temperature T1 of the direct measurement port (6), calibrate the temperature correction formula T=δT0+ΔT1, T is the calibration temperature, and the values of δ and Δ are determined by collecting T0 and T1 of different temperature measurement ports (6) through linear regression; S3, regularly rotating the pan / tilt table (2) so that the infrared thermometer (1) measures the temperature T0 of each reflector in turn. The temperature T1 is the first actual measurement temperature. There is no need to perform multiple actual measurements. The calibration temperature T is obtained after calibration.

5. The temperature measurement method according to claim 4, characterized in that: The method further includes step S4, setting a threshold temperature T2, and issuing an alarm when the calibration temperature T exceeds the threshold temperature T2, wherein the threshold temperature T2 is 90% of the upper temperature limit of the bottom material of the electrolytic cell (4).

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