Close-range non-contact blast furnace molten iron continuous temperature measuring device

Abstract

The invention relates to a close-range non-contact blast furnace molten iron continuous temperature measurement device which comprises an infrared temperature measurement probe, a protection device, an electric sliding table, a control system, a data acquisition system, a safety system, a power supply system and a frame structure. The probe detects infrared radiation signals of molten iron, and the sliding table system achieves accurate movement of the probe and sends the probe to a detection position. Cooling air enters from the tail part of the protection tube, flows through a cooling channel in the tube, takes away heat to ensure that the probe can stably operate in a high-temperature environment, and forms air flow when discharged from the head part of the protection tube, so that smoke dust in front of the probe is conveniently blown away, and interference of the smoke dust on probe detection is reduced. The control system coordinates work of all parts, the data acquisition system records measurement data, the safety system guarantees operation and equipment safety, the power supply system provides stable power supply, and the frame structure is convenient to move and install. The accuracy of blast furnace molten iron temperature measurement is improved, low-cost continuous detection is achieved, and the method is suitable for molten iron temperature monitoring in the blast furnace smelting process.

Description

Technical Field

[0001] This patent application belongs to the field of instrument detection technology, and more specifically, it relates to a close-range non-contact blast furnace molten iron continuous temperature measurement device. Background Art

[0002] In the blast furnace smelting process, precise control of molten iron temperature is crucial to production efficiency and product quality. Traditional temperature measurement methods include insertion thermocouples and infrared temperature measurement technology. For example, manual insertion of thermocouples for measurement not only results in discontinuous measurement results, but also poses operational risks. The insertion-type continuous molten iron temperature measurement device requires the precious metal thermocouple to be immersed in the molten iron for a long time, and the subsequent consumables are expensive, making it difficult to use it for a long time. Infrared temperature measurement technology is an ideal choice for blast furnace molten iron temperature measurement due to its non-contact and fast response characteristics. However, infrared temperature measurement methods also face challenges in practical applications, especially in the slag and smoke environment on the surface of the blast furnace molten iron, where infrared signals are easily interfered with, resulting in measurement errors. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a close-range non-contact blast furnace molten iron continuous temperature measurement device, which can avoid problems in the background and realize non-contact, continuous and accurate measurement of the blast furnace molten iron temperature.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is: A short-distance non-contact blast furnace molten iron continuous temperature measuring device comprises a protection device, an infrared temperature measuring probe installed at the front end of the protection device, a slide system connected to the protection device, a control system connected to the slide system, a data acquisition system for collecting the infrared radiation intensity measured by the infrared temperature measuring probe, and a safety system. The protection device includes a high temperature resistant protection tube, cooling gas is passed into the protection tube, and an infrared temperature measuring probe is located in the protection tube; The slide system includes an electric slide connected to the protection tube, a proximity switch installed on the electric slide, the electric slide is tilted and used to control the vertical movement position of the infrared temperature measuring probe, and the proximity switch is used to limit the movement range of the electric slide, and there are multiple proximity switches; The control system includes a PLC controller connected to the electric slide, a touch screen interface connected to the PLC controller, and the electric slide and proximity switch are also connected to the PLC controller; The data acquisition system includes a data processing unit located in the PLC controller, and the data processing unit is used to convert the infrared radiation intensity data of the molten iron surface continuously collected by the infrared temperature measuring probe into the molten iron temperature value; the data processing unit also includes a temperature compensation module and a data smoothing processing module, the temperature compensation module is used to correct the measurement error caused by environmental factors (such as smoke and slag), and the data smoothing processing module is used to smooth the data; The safety system includes a temperature sensor installed in the protective tube and an emergency stop module located in the PLC controller. The temperature sensor is located on one side of the infrared temperature probe. The temperature sensor is connected to the PLC controller and is used to monitor the working temperature of the infrared temperature probe. The emergency stop module is used to urgently retract the infrared temperature probe and issue an alarm.

[0005] Furthermore, the protection tube is a stainless steel tube or a seamless steel tube, and the infrared temperature measuring probe is a high-sensitivity, high-temperature resistant probe.

[0006] Furthermore, the cooling gas is nitrogen or dry air, and the cooling gas enters from the tail end of the protection tube and is discharged from the head end after being purified by the pressure regulating tank.

[0007] Furthermore, the proximity switches are provided in two groups, one above the other, and the two groups of proximity switches are used to realize the upper limit position and the lower limit position of the electric slide respectively.

[0008] Furthermore, the touch screen interface is a touch screen display, or a software interface of an industrial dustproof touch screen connected to a PLC controller.

[0009] Furthermore, it also includes a power supply system, which is used to provide a stable power supply for the electric slide and the PLC controller, and includes an AC power supply and a backup battery.

[0010] Furthermore, it also includes a frame structure, which includes a movable frame on which various components are installed.

[0011] Furthermore, the frame is a detachable frame.

[0012] Due to the adoption of the above technical solution, the beneficial effects achieved by the present invention are: In this device, the infrared temperature probe is used to detect the infrared radiation signal of molten iron. The slide system realizes the precise movement of the probe and sends the infrared temperature probe to the detection position. The cooling gas enters from the rear of the protective tube and flows through the cooling channel in the protective tube to take away the heat to ensure that the probe can operate stably in a high temperature environment. When the cooling gas is discharged from the head of the protective tube, an airflow is formed, which helps to blow away the smoke and dust in front of the infrared temperature probe and reduce the interference of smoke and dust on the detection of the infrared temperature probe. The control system coordinates the work of each component, the data acquisition system records the measurement data, the safety system ensures the safety of operation and equipment, the power supply system provides a stable power supply, and the frame structure is easy to move and install. The present invention improves the accuracy of blast furnace molten iron temperature measurement, realizes low-cost continuous detection, and is suitable for molten iron temperature monitoring during blast furnace smelting. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a side view structural schematic diagram of the device.

[0014] Figure 2 It is a front structural schematic diagram of the device.

[0015] Figure 3 It is a rear view structural schematic diagram of the device.

[0016] Among them: infrared temperature measuring probe 10, protection tube 11, electric slide 12, proximity switch 13, PLC controller 14, touch screen interface 15, purification and pressure regulating tank 16, temperature sensor 17, frame 18. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below with reference to the embodiments.

[0018] A close-range non-contact blast furnace molten iron continuous temperature measurement device, such as Figure 1~Figure 3 As shown, including: Infrared temperature probe 10: Figure 1 As shown, the infrared temperature probe 10 is installed at the front end of the protection tube 11, that is, the infrared temperature probe 10 is protected inside the protection tube 11, and it also shows that the infrared temperature probe 10 is at the front end of the protection tube 11. The design of the infrared temperature probe 10 can adapt to the high temperature environment of the molten iron surface of the blast furnace, and has high measurement accuracy and reliability. Therefore, the infrared temperature probe 10 adopts a high-sensitivity infrared sensor and can work stably in a high temperature environment. At the same time, the design of the infrared temperature probe 10 should ensure that it can resist high temperature and mechanical shock, and maintain good infrared signal transmission performance.

[0019] The protective device includes a high temperature resistant protective tube 11, such as a stainless steel tube or a seamless steel tube. The protective tube 11 protects the infrared temperature probe 10 from being damaged by direct contact with high temperature. A gas port is provided at the tail of the protective tube 11 for discharging cooling gas. Cooling gas, usually nitrogen or dry air, is introduced into the protective tube 11. The cooling gas enters from the tail of the protective tube 11 after being purified by the pressure regulating tank 16 and is discharged from the head. It flows through the cooling channel in the protective tube 11, taking away the heat generated by the infrared temperature probe 10 and any additional heat caused by the high temperature environment. This ensures that the infrared temperature probe 10 maintains a stable operating temperature in a high temperature environment and prolongs its service life. At the same time, when the cooling gas is discharged from the head of the protective tube 11, an airflow is formed, which helps to blow away the smoke and dust in front of the infrared temperature probe 10. This can reduce the interference of smoke and dust on the detection of the infrared temperature probe 10 and improve the measurement accuracy. Therefore, it can be seen that the protective device adopts a ventilation cooling method, and the heat generated by the infrared temperature probe 10 is taken away by the cooling gas to ensure the stable operation of the infrared temperature probe 10.

[0020] Slide system: The slide system can accurately control the position of the infrared temperature probe 10 so that it can measure at different positions on the surface of molten iron, including an electric slide 12 and a proximity switch 13. The electric slide 12 is used to control the vertical movement of the infrared temperature probe 10, and the proximity switch 13 is used to limit the movement range of the electric slide 12 to ensure that the infrared temperature probe 10 does not exceed the predetermined measurement area. The proximity switch 13 is arranged in two groups up and down, and the two groups of proximity switches 13 are used to realize the upper limit and lower limit of the electric slide 12 respectively. The driving device of the electric slide 12 can also be a stepper motor or a servo motor, which is precisely controlled as needed. The electric slide 12 adopts high-precision positioning control, which can realize the precise movement of the infrared temperature probe 10 on the surface of molten iron to obtain temperature data at different distances.

[0021] Control system: The control system includes a PLC controller 14 and a touch screen interface 15. The PLC controller 14 is responsible for controlling the operation of the entire system, including the movement of the electric slide 12, the movement of the infrared temperature probe 10, data acquisition, and alarm functions. The touch screen interface 15 is used to display real-time data, historical trends, and system status, while allowing the operator to input temperature correction values ​​and make other settings. The touch screen interface 15 can be a touch screen display or a software interface of an industrial dustproof touch screen connected to the PLC controller 14. The electric slide 12 and the proximity switch 13 are connected to the PLC controller 14.

[0022] The PLC controller 14 of the control system can automatically control the movement and data collection of the infrared temperature measuring probe 10 according to a preset measurement program, while the touch screen interface 15 provides a user-friendly operation interface for users to easily set up the device and view data.

[0023] Data acquisition system: includes a data processing unit for real-time acquisition of infrared radiation intensity data measured by the infrared temperature measuring probe 10 and converting it into molten iron temperature values. The data processing unit also includes a temperature compensation algorithm for correcting measurement errors caused by environmental factors (such as smoke and slag). The data processing unit uses advanced algorithms to process and analyze the measurement data to improve measurement accuracy and reliability.

[0024] Safety system: The safety system includes a temperature sensor 17 and an emergency stop mechanism. The temperature sensor 17 is a high-precision, high-stability sensor. The temperature sensor 17 is installed inside the protective tube 11 and is used to monitor the working temperature of the infrared temperature probe 10 in real time. The temperature sensor 17 is located on one side of the infrared temperature probe 10, and the temperature sensor 17 is connected to the PLC controller 14. When the temperature of the infrared temperature probe 10 exceeds the set threshold, the emergency stop mechanism will automatically start, control the electric slide 12 to retract, and take the infrared temperature probe 10 away from the high temperature environment to protect the infrared temperature probe 10 from being damaged by high temperature, and sound an alarm to protect the infrared temperature probe 10 and the device. The moving range of the slide system is limited by the proximity switch to ensure that the infrared temperature probe 10 does not exceed the predetermined measurement area.

[0025] Power supply system: Provides a stable power supply for the entire device, including AC power supply and backup battery. The AC power supply of the power supply system provides the main power supply for the device, and the backup battery serves as an emergency power supply to ensure the normal operation of the device and the safe preservation of data in the event of a power failure. In the event of a power failure, the backup battery can ensure the return of the electric slide 12 and protect the infrared temperature probe 10. The power supply system should also include a power switch and an overload protection device to ensure the safe operation of the system.

[0026] Frame structure: All components are mounted on a movable frame 18, which is designed to be detachable for easy movement and installation between different molten iron tapping holes. The frame 18 can be made of metal and has sufficient strength and stability to support the weight of all components and withstand the working load of the equipment in a high temperature environment. The frame 18 can also be equipped with wheels or a track system to facilitate movement around the blast furnace.

[0027] The device may also include other auxiliary function modules, such as a remote monitoring module, a wireless communication module, etc., to realize remote monitoring and data transmission functions, which will not be described in detail here.

[0028] The use process of this device is: 1. Installation and debugging: Install the infrared temperature probe 10 in the protective tube 11 and ensure that it is correctly connected to the slide system. Connect the power system and perform necessary system configuration, including setting temperature compensation parameters, slide motion parameters, etc.

[0029] 2. On-site deployment: Move the device to the vicinity of the blast furnace hearth, and adjust the starting position of the slide system according to the actual situation to ensure that the infrared temperature probe 10 can cover the molten iron surface area that needs to be measured.

[0030] 3. Start measurement: Start the data acquisition system through the touch screen interface 15, and the slide system starts to move the infrared temperature probe 10 according to the preset program. When the infrared temperature probe 10 approaches the surface of the molten iron, the control system automatically adjusts the position of the infrared temperature probe 10 to ensure that the infrared temperature probe 10 can stably detect the temperature of the molten iron.

[0031] 4. Temperature collection: The infrared temperature measuring probe 10 continuously collects infrared radiation intensity data on the surface of the molten iron, and the data collection system converts this data into molten iron temperature values ​​in real time.

[0032] 5. Data processing: The data processing unit processes the collected data, including temperature compensation and data smoothing, to improve measurement accuracy. The processed data is displayed through the touch screen interface 15 and can be stored locally or on a remote server for subsequent analysis.

[0033] 6. Monitoring and alarm: The control system monitors the working status and environmental conditions of the infrared temperature probe 10 in real time, such as temperature, gas flow, etc. When an abnormal situation is detected, such as the probe temperature is too high or the slide position exceeds the preset range, the system will automatically take measures, such as sounding an alarm, controlling the infrared temperature probe 10 to return urgently, etc., to ensure the safety of the equipment and operators.

[0034] 7. Maintenance and calibration: Regularly calibrate the infrared temperature probe 10 to ensure measurement accuracy. Clean and maintain the protection tube 11 according to actual use to extend its service life. At the same time, check whether the power supply system and control system function normally to ensure stable operation of the system.

[0035] 8. Data analysis: The collected temperature data can be used for optimization and quality control of the production process. By analyzing the trend of molten iron temperature, changes in furnace conditions can be predicted to provide support for production decisions. In addition, the data can also be used for long-term process research and equipment performance evaluation.

[0036] 9. Remote monitoring and control: Through network connection, remote monitoring and control functions can be realized. Operators can view real-time data, adjust measurement parameters and control system settings through the remote interface, and even perform fault diagnosis and remote troubleshooting when necessary.

[0037] Through the coordinated work of the above-mentioned components, the present invention can realize non-contact, continuous and precise measurement of blast furnace molten iron temperature, improve the accuracy of blast furnace molten iron temperature measurement, realize low-cost continuous detection, and is suitable for molten iron temperature monitoring during blast furnace smelting.

[0038] The infrared temperature probe 10 works stably in a high temperature environment, and the environmental impact is reduced and the measurement accuracy is improved through the protection device and the cooling system. The slide system ensures that the infrared temperature probe 10 measures at different positions on the surface of the molten iron. The data acquisition system collects temperature data in real time, and performs temperature compensation and data processing through the data processing system. The control system realizes automatic control and remote monitoring, and the safety system ensures the safety of equipment and operators. The power supply system and the frame structure provide a stable working environment and flexible mobility. The present invention is suitable for online measurement of molten iron temperature during blast furnace smelting, can provide strong support for production management and process improvement, and has high practicality.

Claims

1. A short-distance non-contact blast furnace molten iron continuous temperature measurement device, characterized in that: The invention comprises a protection device, an infrared temperature measuring probe (10) installed at the front end of the protection device, a slide system connected to the protection device, a control system connected to the slide system, a data acquisition system for collecting the infrared radiation intensity measured by the infrared temperature measuring probe (10), and a safety system. The protection device comprises a high temperature resistant protection tube (11), cooling gas is passed into the protection tube (11), and the infrared temperature measuring probe (10) is located in the protection tube (11); The slide system comprises an electric slide (12) connected to a protective tube (11), and a proximity switch (13) mounted on the electric slide (12); the electric slide (12) is tilted and used to control the vertical movement position of the infrared temperature measuring probe (10); the proximity switch (13) is used to limit the movement range of the electric slide (12), and the number of the proximity switch (13) is plural; The control system includes a PLC controller (14), a touch screen interface (15) connected to the PLC controller (14), and an electric slide (12) and a proximity switch (13) are also connected to the PLC controller (14); The data acquisition system comprises a data processing unit located in a PLC controller (14), the data processing unit being used to convert infrared radiation intensity data of the molten iron surface continuously collected by the infrared temperature measuring probe (10) into a molten iron temperature value; the data processing unit also comprises a temperature compensation module and a data smoothing processing module, the temperature compensation module being used to correct measurement errors caused by environmental factors, and the data smoothing processing module being used to smooth the data; The safety system comprises a temperature sensor (17) installed in a protective tube (11) and an emergency stop module located in a PLC controller (14); the temperature sensor (17) is located on one side of the infrared temperature measuring probe (10); the temperature sensor (17) is connected to the PLC controller (14) and is used to monitor the working temperature of the infrared temperature measuring probe (10); and the emergency stop module is used to urgently retract the infrared temperature measuring probe (10) and issue an alarm.

2. The short-distance non-contact blast furnace molten iron continuous temperature measuring device according to claim 1 is characterized in that: The protection tube (11) is a stainless steel tube or a seamless steel tube, and the infrared temperature measuring probe (10) is a high-sensitivity, high-temperature resistant probe.

3. The short-distance non-contact blast furnace molten iron continuous temperature measuring device according to claim 1 is characterized in that: The cooling gas is nitrogen or dry air. After passing through the purification pressure regulating tank (16), the cooling gas enters from the tail end of the protection tube (11) and is discharged from the head end.

4. The short-distance non-contact blast furnace molten iron continuous temperature measuring device according to claim 1 is characterized in that: The proximity switches (13) are arranged in two groups, one above the other. The two groups of proximity switches (13) are respectively used to realize the upper limit position and the lower limit position of the electric slide (12).

5. The short-distance non-contact blast furnace molten iron continuous temperature measuring device according to claim 1 is characterized in that: The touch screen interface (15) is a touch screen display, or a software interface of an industrial dustproof touch screen connected to the PLC controller (14).

6. A close-range non-contact blast furnace molten iron continuous temperature measuring device according to any one of claims 1 to 5, characterized in that: It also includes a power supply system, which is used to provide a stable power supply and includes an AC power supply and a backup battery.

7. The short-distance non-contact blast furnace molten iron continuous temperature measuring device according to claim 6 is characterized in that: It also includes a frame structure, which includes a movable frame (18) on which various components are installed.

8. The short-distance non-contact blast furnace molten iron continuous temperature measuring device according to claim 7 is characterized in that: The frame (18) is a detachable frame.

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