Application of Infrared Thermometer in Ironmaking Plant
Measurement of the arch temperature of a hot air stove
The arch of a hot air stove is a special occasion, and the measurement of the arch temperature not only needs to solve the high temperature and high pressure problems of the tested target, but also needs to adapt to the requirements of outdoor environmental changes throughout the year. After repeated practice and improvement, we have designed a special protective device with a sealed window. The method of use is to fix the infrared probe equipped with a protective device at the position where the thermocouple was originally inserted on the dome, so that the probe can aim at the inside of the hot air furnace through the sealing window and thermocouple socket, measure the temperature of the dome of the hot air furnace, and send the probe signal to the instrument box installed on the control cabinet for processing through the cable. The temperature value is displayed, and a 4-20mA standard current signal is output, which is then sent to a recorder or computer for processing. Due to the fact that the infrared probe of this system does not come into contact with high-temperature targets, it has the characteristics of stability, reliability, and long service life. It can usually operate continuously for more than five years, reducing thermocouple consumption, greatly reducing equipment operating costs and maintenance workload.
Measurement of internal temperature in hot air ducts
The temperature measurement device of this system is basically similar to the dome temperature measurement system. The infrared probe equipped with a protective device is installed on the socket of the original thermocouple in the hot air pipeline. The infrared probe passes through the sealing window of the protective device, and then through the socket of the original thermocouple, targets the inside of the hot air pipeline to measure the temperature inside the hot air pipeline. Due to the installation of the temperature measurement probe in this system on the outside of the sealed window, the entire temperature measurement system is completely isolated from the hot air inside the pipe. Therefore, the system can be replaced or other maintenance work can be carried out without affecting the working status of the hot air inside the pipe. However, the commonly used thermocouples must be replaced in the off wind state, and thermocouples are consumables that are frequently damaged. This temperature measurement system can reduce thermocouple consumption and equipment operating costs. Currently, the system has been used by units such as Benxi Steel, Chengde Steel, and Laiwu Steel, and has achieved good economic benefits.
Measurement of the temperature of molten iron in front of the furnace
The method of measuring molten iron in front of the furnace using the HDIR series infrared thermometer is to fix the infrared thermometer probe equipped with a blowing sleeve on a bracket 5 to 15 meters away from the molten iron, and aim at the iron ditch to continuously scan and measure each furnace of molten iron. The temperature signal measured by the probe is connected to the recorder to print the temperature curve or sent to the computer for data processing. The biggest advantage of this system is that it can automatically and continuously measure the temperature of each furnace of molten iron, effectively avoiding the influence of human factors caused by manual insertion of temperature measurement methods. By analyzing the recorded temperature curve or other computer processing information, the trend of temperature changes in each furnace can be accurately reflected, and the high temperature of each furnace can be intuitively read out, providing a strong basis for production management and process improvement. At present, the system has been used by units such as Hubei Steel and Shougang, and has received high praise from users.
