Application of Infrared Thermometer in Temperature Measurement of Coke Oven
Principle and Application of Infrared Thermometer
The IR-AHU infrared thermometer and its temperature measuring software can truly reflect the internal temperature of the coke oven in the temperature measurement of the coke oven, so that the uniformity coefficient of the coke oven temperature is significantly improved, and the coke quality is stable.
1 R - Principle of AHU Infrared Thermometer
The theoretical basis of infrared temperature measurement technology is the basic heat radiation law such as Planck's law. The energy radiated by a black body is a function of temperature and wavelength. For a black body at the same temperature, the energy radiated by it is distributed regularly according to the wavelength. Planck deduced the energy radiated by a black body in the wavelength interval by using the radiation quantum statistics theory. The infrared thermometer is to convert the infrared radiant energy emitted by the object into an electrical signal to determine the temperature of the object.
2 Performance comparison of thermometers
Compared with optical pyrometers, infrared thermometers have the advantages of high resolution, light weight, easy portability, simple operation, and complete functions. They can store and print data, reduce the labor intensity of operators and improve efficiency. Temperature measurement staff consists of 3 people reduced to 2 people. Due to the automatic liquid crystal display of temperature, human errors are greatly reduced.
① Selection of temperature measurement point
When using an optical pyrometer to measure the temperature at the bottom of the flue, the end of the invisible filament is usually aligned with the nose bridge brick, while the measuring ring of the objective lens of the IR-AHU infrared thermometer is aligned with the chute and burner at the bottom of the flue empty space between.
② Setting of emissivity of infrared thermometer
The strength of the infrared thermometer to receive the light radiation signal of the object depends on the temperature and surface roughness of the object surface, and the emissivity of the object is proportional to its own temperature, which is about 0.1 to 1.0. Therefore, in order to make the temperature measured by the infrared thermometer accurate, it is necessary to set the emissivity of the infrared thermometer reasonably.
In order to ensure accurate temperature measurement, a standard optical pyrometer and an infrared thermometer are used to simultaneously measure the chute at the bottom of the flue and the open area between the burner to adjust the emissivity to match the standard optical pyrometer value, so that The relationship between emissivity and temperature can be obtained. Since the furnace temperature is 1100-1300°C, 0.95 at 1200°C is selected as the emissivity of the whole furnace.
Principle and Application of Infrared Thermometer
The IR-AHU infrared thermometer and its temperature measuring software can truly reflect the internal temperature of the coke oven in the temperature measurement of the coke oven, so that the uniformity coefficient of the coke oven temperature is significantly improved, and the coke quality is stable.
1 R - Principle of AHU Infrared Thermometer
The theoretical basis of infrared temperature measurement technology is the basic heat radiation law such as Planck's law. The energy radiated by a black body is a function of temperature and wavelength. For a black body at the same temperature, the energy radiated by it is distributed regularly according to the wavelength. Planck deduced the energy radiated by a black body in the wavelength interval by using the radiation quantum statistics theory. The infrared thermometer is to convert the infrared radiant energy emitted by the object into an electrical signal to determine the temperature of the object.
2 Performance comparison of thermometers
Compared with optical pyrometers, infrared thermometers have the advantages of high resolution, light weight, easy portability, simple operation, and complete functions. They can store and print data, reduce the labor intensity of operators and improve efficiency. Temperature measurement staff consists of 3 people reduced to 2 people. Due to the automatic liquid crystal display of temperature, human errors are greatly reduced.
① Selection of temperature measurement point
When using an optical pyrometer to measure the temperature at the bottom of the flue, the end of the invisible filament is usually aligned with the nose bridge brick, while the measuring ring of the objective lens of the IR-AHU infrared thermometer is aligned with the chute and burner at the bottom of the flue empty space between.
② Setting of emissivity of infrared thermometer
The strength of the infrared thermometer to receive the light radiation signal of the object depends on the temperature and surface roughness of the object surface, and the emissivity of the object is proportional to its own temperature, which is about 0.1 to 1.0. Therefore, in order to make the temperature measured by the infrared thermometer accurate, it is necessary to set the emissivity of the infrared thermometer reasonably.
In order to ensure accurate temperature measurement, a standard optical pyrometer and an infrared thermometer are used to simultaneously measure the chute at the bottom of the flue and the open area between the burner to adjust the emissivity to match the standard optical pyrometer value, so that The relationship between emissivity and temperature can be obtained. Since the furnace temperature is 1100-1300°C, 0.95 at 1200°C is selected as the emissivity of the whole furnace.
