Blast furnace tap hole molten iron infrared continuous temperature measurement system and method

Abstract

The invention relates to the technical field of metallurgical ironmaking, and discloses an infrared continuous temperature measurement system and method for molten iron at a blast furnace tap hole. The two double-color temperature measuring devices are respectively arranged at different tap holes of the same blast furnace and are used for acquiring thermal imaging data and temperature data of molten iron at the tap hole of the current blast furnace in real time; the industrial personal computer comprises a data processing module, a data management module and a data storage module; the data processing module is used for preprocessing the thermal imaging data and the temperature data of the molten iron at the tap hole, which are acquired by the two double-color temperature measuring devices in real time, and transmitting the thermal imaging data and the temperature data to the data management module; acquiring a molten iron temperature threshold value at the blast furnace taphole under the current process from the standard database; when the temperature data exceeds the molten iron temperature threshold value, an alarm is given; through collection and analysis of continuous temperature measurement data, more accurate molten iron quality information can be provided for blast furnace operators, and optimization of a smelting process and improvement of product quality are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgy and iron-making, and more specifically to a blast furnace taphole molten iron infrared continuous temperature measurement system and method. Background Art

[0002] In the foundry industry, the temperature of molten steel must be measured before it leaves the furnace. To ensure the production technical standards of the molten metal, the traditional method is to use contact thermocouples for insertion measurement. The advantage is that the measured temperature is relatively stable, but there are also certain disadvantages: first, the thermocouple is disposable, which consumes a lot of energy and has high long-term temperature measurement costs; second, it requires a high level of work experience and sense of responsibility from the furnace operators; in addition, during the measurement process, metal liquid splashing may occur, increasing safety risks.

[0003] Most of the measuring devices in the prior art use continuous temperature measurement technology and soft measurement prediction models to predict and estimate the molten iron temperature. However, this technology has certain accuracy issues, especially in the complex blast furnace environment, where continuous temperature measurement technology is easily affected by dust, smoke and other interference factors. In harsh environments, temperature measurement equipment requires frequent maintenance and calibration to ensure measurement accuracy, which invisibly increases maintenance costs and downtime. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a blast furnace taphole molten iron infrared continuous temperature measurement system and method, which has the characteristics of low cost and continuous temperature measurement, realizes continuous and accurate measurement of molten iron temperature, and can solve the shortcomings of the above-mentioned prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions: A blast furnace taphole molten iron infrared continuous temperature measurement system, comprising a two-color temperature measurement device, an industrial switch and an industrial computer; The two-color temperature measuring devices are provided with two; the two two-color temperature measuring devices are respectively connected to the industrial switch for communication, and the industrial switch is connected to the industrial computer for communication; The two two-color temperature measuring devices are respectively arranged at different tapping holes of the same blast furnace, and are used to obtain in real time the thermal imaging data and temperature data of the molten iron at the tapping hole of the blast furnace under the current process; The industrial switch is used to transmit thermal imaging data and temperature data to the industrial computer; The industrial computer is used to pre-process the thermal imaging data and the temperature data, and compare the temperature data of the molten iron at the blast furnace tapping hole with the preset molten iron temperature threshold, and when the temperature data exceeds the preset molten iron temperature threshold, an alarm is issued; The industrial computer includes a data processing module, a data management module, a data storage module and an alarm module; A data processing module, used for preprocessing the thermal imaging data and temperature data of the molten iron at the tapping hole acquired in real time by the two dual-color temperature measuring devices, and transmitting them to the data management module; The data management module is equipped with a standard database, which is used to obtain the preset molten iron temperature threshold at the blast furnace tapping hole under the current process from the standard database; based on the molten iron temperature threshold at the blast furnace tapping hole under the current process, the temperature data obtained by the two two-color temperature measuring devices are compared respectively, and when the temperature data exceeds the molten iron temperature threshold, an alarm is issued through the alarm module; The data storage module is used to store the temperature data, thermal imaging data and alarm information of the molten iron at the blast furnace tapping hole under the current process.

[0006] Furthermore, the standard database also stores the tap hole number, tap time, and tap temperature change curve of the blast furnace, and the operator can quickly query according to the time index and tap hole number.

[0007] Furthermore, the industrial switch is electrically connected to an LED liquid crystal display screen, and the LED liquid crystal display screen is used to display the current molten iron temperature at the blast furnace tapping port in real time.

[0008] Furthermore, the two-color temperature measuring device is specifically a two-color infrared thermometer, and the two-color infrared thermometer is provided with a lens dirt detection function.

[0009] Furthermore, the two-color infrared thermometer is also provided with a high-temperature protection cover.

[0010] Furthermore, the specific parameters of the two-color infrared thermometer are: temperature measurement range: 600~1800℃; temperature measurement accuracy: ±0.3%; repeatability: 1℃; resolution: 0.1℃; response time: 1ms~99.99s.

[0011] Furthermore, the temperature standard signal of the industrial computer is an output of 4~20mA.

[0012] The present invention also provides a method for continuous infrared temperature measurement of molten iron at a blast furnace tap hole, comprising the following steps: S1. Real-time acquisition of thermal imaging data and temperature data of molten iron at the current blast furnace tapping port through two dual-color temperature measuring devices; S2, preprocessing the thermal imaging data and temperature data of the molten iron at the tap hole obtained in real time by the two dual-color temperature measuring devices; S3, obtaining the molten iron temperature threshold at the blast furnace tapping hole under the current process from the standard database; based on the molten iron temperature threshold at the blast furnace tapping hole under the current process, respectively compare with the temperature data obtained by the two two-color temperature measuring devices, and when the temperature data exceeds the molten iron temperature threshold, an alarm is issued; S4. Store the temperature data, thermal imaging data, average temperature data and alarm information of the molten iron at the blast furnace tapping hole under the current process.

[0013] Furthermore, the S1, real-time acquisition of thermal imaging data and temperature data of the molten iron in the current blast furnace, specifically: real-time acquisition of the maximum temperature, minimum temperature and average temperature of the molten iron at the current blast furnace tapping hole; In S3, when the temperature data exceeds the molten iron temperature threshold, an alarm is issued, specifically: a maximum temperature level 1 alarm, a maximum temperature level 2 alarm, and a maximum temperature level 3 alarm.

[0014] Furthermore, the S4 stores the temperature data, thermal imaging data and alarm information of the molten iron temperature threshold at the blast furnace tapping port under the current process, specifically: the temperature data and the average temperature data are used to generate a temperature curve of the molten iron, and the temperature curve of the molten iron and the alarm information are analyzed and stored.

[0015] According to the specific embodiments provided by the present invention, the present invention has the following technical effects: The present invention uses a two-color temperature measuring device to obtain the thermal imaging data and temperature data of the molten iron at the blast furnace tapping hole under the current process in real time, and pre-processes the thermal imaging data and temperature data through an industrial computer, and compares the temperature data of the molten iron at the blast furnace tapping hole with a preset molten iron temperature threshold. When the temperature data exceeds the preset molten iron temperature threshold, an alarm is issued; the continuous and accurate measurement of the molten iron temperature is achieved, the accuracy and continuity of the temperature measurement are improved, the operating difficulty and safety risks of the personnel are reduced, and the efficiency and safety of blast furnace smelting are improved. At the same time, the present invention can provide more accurate molten iron quality information for blast furnace operators through the collection and analysis of continuous temperature measurement data, which is helpful to optimize the smelting process and improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] The following is a further description of the infrared continuous temperature measurement system and method for molten iron at a blast furnace tap hole of the present invention in conjunction with the accompanying drawings; Figure 1 It is the overall structure diagram of the infrared continuous temperature measurement system for molten iron at the blast furnace tap hole provided by the present invention; Figure 2 It is a schematic diagram of real-time display of blast furnace operation parameters in the blast furnace tapping hole molten iron infrared continuous temperature measurement system provided by the present invention; Figure 3 It is a schematic diagram of the current temperature of molten iron in the blast furnace in the blast furnace tapping hole molten iron infrared continuous temperature measurement system provided by the present invention; Figure 4 It is a schematic diagram of obtaining the temperature of molten iron in the infrared continuous temperature measurement system for molten iron at the blast furnace tapping hole provided by the present invention, wherein (a) is the temperature data obtained by one of the two-color temperature measuring devices, and (b) is the temperature data obtained by the other two-color temperature measuring device; Figure 5 It is a schematic diagram of a continuous temperature measurement method in an infrared continuous temperature measurement system for molten iron at a blast furnace tapping hole provided by the present invention.

[0018] In the figure: 1. Iron outlet; 2. Two-color temperature measuring device; 3. Industrial computer; 4. LED liquid crystal display; 5. High temperature protective cover; 6. Industrial switch. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1 As shown, a blast furnace tapping hole molten iron infrared continuous temperature measurement system includes a two-color temperature measurement device 2, an industrial switch 6 and an industrial computer 3; The two-color temperature measuring devices 2 are provided with two; the two two-color temperature measuring devices 2 are respectively connected to the industrial switch 6 for communication, and the industrial switch 6 is connected to the industrial computer 3 for communication; The two two-color temperature measuring devices 2 are respectively arranged at different tapping holes 1 of the same blast furnace, and are used to obtain in real time the thermal imaging data and temperature data of the molten iron at the tapping hole 1 of the blast furnace under the current process; The industrial switch is used to transmit thermal imaging data and temperature data to the industrial computer; The industrial computer is used to pre-process the thermal imaging data and the temperature data, and compare the temperature data of the molten iron at the blast furnace tapping hole 1 with the preset molten iron temperature threshold, and when the temperature data exceeds the preset molten iron temperature threshold, an alarm is issued; The industrial computer 3 includes a data processing module, a data management module, a data storage module and an alarm module; It should be noted that the industrial computer 3 is installed in the main control room of the blast furnace, and the probe is installed on the top of the ceiling of the iron-making yard, about 20 meters away from the molten iron and fire source. By staying away from high temperature, the service life of the equipment is guaranteed.

[0022] A data processing module, used for preprocessing the thermal imaging data and temperature data of the molten iron at the tap hole 1 acquired in real time by the two two-color temperature measuring devices 2, and transmitting the data to the data management module; The data management module is equipped with a standard database, which is used to obtain the preset molten iron temperature threshold at the blast furnace tapping port 1 under the current process from the standard database; based on the molten iron temperature threshold at the blast furnace tapping port 1 under the current process, the temperature data obtained by the two two-color temperature measuring devices 2 are respectively compared, and when the temperature data exceeds the molten iron temperature threshold, an alarm is issued through the alarm module; The data storage module is used to store the temperature data, thermal imaging data and alarm information of the molten iron at the blast furnace tapping port 1 under the current process.

[0023] It should be noted that: the two-color infrared temperature measuring device 2 in the present invention is connected to the industrial switch and the working condition through a transmission network. The transmission network is composed of a network transmission line, a data collection center, a signal conversion interface and a data distribution center. The data collected and analyzed by the front-end equipment are aggregated to the monitoring center for storage and further in-depth processing and application; it breaks through the limitations of distance, region and environment, and builds a communication bridge between the front-end equipment and the monitoring center.

[0024] like Figure 2 As shown, the standard database also stores the tap hole 1 number, tap time, and tap temperature change curve of the blast furnace, and the operator can quickly query according to the time index and tap hole number.

[0025] It should be noted that the two-color infrared temperature measuring device in the present invention can accurately detect the real-time change of the molten iron temperature, and the data storage module can automatically record the opening time and closing time of the iron mouth, and record the cumulative iron tapping time, and automatically generate and store the temperature curve of the molten iron; The industrial switch 6 is electrically connected to an LED liquid crystal display screen 4, and the LED liquid crystal display screen 4 is used to display the current molten iron temperature at the blast furnace tapping hole 1 in real time, such as Figure 3 shown.

[0026] The two-color temperature measuring device 2 is specifically: a two-color temperature measuring device having a lens dirt detection function.

[0027] It should be noted that the two-color infrared thermometer can automatically filter out interference from iron slag, coal gas, smoke, etc., thereby ensuring high-precision temperature measurement; and the emissivity can be adjusted online. According to the position, distance environment and the molten iron itself, the emissivity can be set locally or remotely and fine-tuned; it integrates a 5-megapixel visible light high-definition video system, supports one-button automatic focus, and adaptive aperture algorithm to ensure clear imaging in high and low temperature environments; when measuring the molten iron temperature at the iron mouth during tapping, the temperature drop and mixing effects caused by measurements at the main ditch and slag skimmer are eliminated.

[0028] The two-color infrared thermometer is provided with a high-temperature protection cover 5.

[0029] The specific parameters of the two-color infrared thermometer are: temperature measurement range: 600~1800℃; temperature measurement accuracy: ±0.3%; repeatability: 1℃; resolution 0.1℃; response time: 1ms~99.99s.

[0030] It should be noted that the present invention uses the infrared temperature measurement principle, and converts the radiation energy of the target infrared rays in the field of view into electrical energy on the photoelectric detector through the infrared thermometer, and then performs relevant calculations according to the strength of the electrical signal to obtain the temperature value of the molten iron. The infrared thermometer adopts an integrated design with a temperature measuring gun, and is equipped with a shock-resistant full metal shell and a high-brightness LED digital tube to adapt to the characteristics of harsh working environment and high temperature at the smelting temperature measurement site.

[0031] The temperature standard signal of the industrial computer is output 4~20mA / RS485.

[0032] like Figure 5 As shown, the present invention also provides a method for continuous infrared temperature measurement of molten iron at a blast furnace tap hole, comprising the following steps: S1, real-time acquisition of thermal imaging data and temperature data of molten iron at the current blast furnace tapping hole 1 by two two-color temperature measuring devices 2; S2, the two two-color temperature measuring device 2 real-time acquisition of the molten iron at the tap hole 1 thermal imaging data and temperature data pre-processing; S3, obtain the molten iron temperature threshold at the blast furnace tap hole 1 under the current process from the standard database; based on the molten iron temperature threshold at the blast furnace tap hole 1 under the current process, compare it with the temperature data obtained by the two two-color temperature measuring devices 2, such as Figure 4 (a) and Figure 4 (b) As shown; when the temperature data exceeds the molten iron temperature threshold, an alarm is issued; S4. Store the temperature data, thermal imaging data, average temperature data and alarm information of the molten iron at the blast furnace tap hole 1 under the current process.

[0033] S1, real-time acquisition of thermal imaging data and temperature data of molten iron in the current blast furnace, specifically: real-time acquisition of the maximum temperature, minimum temperature and average temperature of molten iron at the current blast furnace tapping hole 1; In S3, when the temperature data exceeds the molten iron temperature threshold, an alarm is issued, specifically: a maximum temperature level 1 alarm, a maximum temperature level 2 alarm, and a maximum temperature level 3 alarm.

[0034] The S4 stores the temperature data, thermal imaging data and alarm information of the molten iron temperature threshold at the blast furnace tapping port 1 under the current process, specifically: generates a temperature curve of the molten iron from the temperature data and the average temperature data, and analyzes and stores the temperature curve of the molten iron and the alarm information.

[0035] It should be noted that the present invention also has the following technical effects: non-contact temperature measurement is adopted, and the temperature measurement does not affect production, and the degree of automation is high. Since the present invention only needs to check the temperature display during the production process, the production cost will be greatly reduced, and the average service life of the instrument can reach 5-10 years; it greatly improves the operating environment and labor intensity of workers, and improves the automation level of the factory; it avoids direct contact between workers and high-temperature molten iron, prevents burns from high temperature, and ensures production safety.

[0036] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A blast furnace tap hole molten iron infrared continuous temperature measurement system, characterized in that: It comprises a two-color temperature measuring device (2), an industrial switch (6) and an industrial computer (3); Two two-color temperature measuring devices (2) are provided; the two two-color temperature measuring devices (2) are respectively connected to the industrial switch (6) for communication, and the industrial switch (6) is connected to the industrial control computer (3) for communication; The two two-color temperature measuring devices (2) are respectively arranged at different tapping holes (1) of the same blast furnace, and are used to obtain in real time thermal imaging data and temperature data of molten iron at the tapping hole (1) of the blast furnace under the current process; The industrial switch is used to transmit thermal imaging data and temperature data to the industrial computer; The industrial computer is used to pre-process the thermal imaging data and the temperature data, and compare the temperature data of the molten iron at the blast furnace tapping port (1) with a preset molten iron temperature threshold, and to issue an alarm when the temperature data exceeds the preset molten iron temperature threshold; The industrial computer (3) comprises a data processing module, a data management module, a data storage module and an alarm module; A data processing module, used for pre-processing the thermal imaging data and temperature data of the molten iron at the tap hole (1) acquired in real time by the two two-color temperature measuring devices (2), and transmitting the data to the data management module; The data management module is provided with a standard database, and is used to obtain a preset molten iron temperature threshold at the blast furnace tapping hole (1) under the current process from the standard database; based on the molten iron temperature threshold at the blast furnace tapping hole (1) under the current process, the temperature data obtained by the two two-color temperature measuring devices (2) are respectively compared, and when the temperature data exceeds the molten iron temperature threshold, an alarm is issued through the alarm module; The data storage module is used to store temperature data, thermal imaging data and alarm information of molten iron at the blast furnace tapping hole (1) under the current process.

2. The blast furnace tap hole molten iron infrared continuous temperature measurement system according to claim 1, characterized in that: The standard database also stores the tap hole (1) number, tap time, and tap temperature change curve of the blast furnace, and the operator can quickly query according to the time index and tap hole number.

3. The blast furnace tap hole molten iron infrared continuous temperature measurement system according to claim 1, characterized in that: The industrial switch (6) is electrically connected to an LED liquid crystal display screen (4), and the LED liquid crystal display screen (4) is used to display the current molten iron temperature at the blast furnace tapping hole (1) in real time.

4. The blast furnace tap hole molten iron infrared continuous temperature measurement system according to claim 1, characterized in that: The two-color temperature measuring device (2) is specifically a two-color infrared thermometer, and the two-color infrared thermometer is provided with a lens dirt detection function.

5. The blast furnace tap hole molten iron infrared continuous temperature measurement system according to claim 4, characterized in that: The two-color infrared thermometer is also provided with a high-temperature protection cover (5).

6. The blast furnace tap hole molten iron infrared continuous temperature measurement system according to claim 5, characterized in that: The specific parameters of the two-color infrared thermometer are: temperature measurement range: 600~1800℃; temperature measurement accuracy: ±0.3%; repeatability: 1℃; resolution: 0.1℃; response time: 1ms~99.99s.

7. The blast furnace tap hole molten iron infrared continuous temperature measurement system according to claim 1, characterized in that: The temperature standard signal of the industrial control computer (3) is an output of 4-20 mA.

8. A method for continuous infrared temperature measurement of molten iron at a blast furnace tap hole, applied to the continuous infrared temperature measurement system for molten iron at a blast furnace tap hole as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1, obtaining in real time thermal imaging data and temperature data of molten iron at the current blast furnace tapping port (1) through two two-color temperature measuring devices (2); S2, pre-processing the thermal imaging data and temperature data of the molten iron at the tap hole (1) obtained in real time by the two dual-color temperature measuring devices (2); S3, obtaining a molten iron temperature threshold at the blast furnace tapping hole (1) under the current process from a standard database; comparing the molten iron temperature threshold at the blast furnace tapping hole (1) under the current process with the temperature data obtained by the two two-color temperature measuring devices (2), and when the temperature data exceeds the molten iron temperature threshold, an alarm is issued; S4. The temperature data, thermal imaging data, average temperature data and alarm information of the molten iron at the blast furnace tapping hole (1) under the current process are stored.

9. The method for continuous infrared temperature measurement of molten iron at a blast furnace tap hole according to claim 8, characterized in that: S1, real-time acquisition of thermal imaging data and temperature data of the molten iron in the current blast furnace, specifically: real-time acquisition of the maximum temperature, minimum temperature and average temperature of the molten iron at the current blast furnace tapping port (1); In S3, when the temperature data exceeds the molten iron temperature threshold, an alarm is issued, specifically: a maximum temperature level 1 alarm, a maximum temperature level 2 alarm, and a maximum temperature level 3 alarm.

10. The method for continuous infrared temperature measurement of molten iron at a blast furnace tap hole according to claim 9, characterized in that: The S4 stores the temperature data, thermal imaging data and alarm information of the molten iron temperature threshold at the blast furnace tapping port (1) under the current process, specifically: generates a molten iron temperature curve from the temperature data and the average temperature data, and analyzes and stores the molten iron temperature curve and the alarm information.

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