What methods are more reasonable to use to monitor the furnace temperature field distribution?
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For multi-burner furnaces, the temperature field distribution is closely related to the combustion conditions of each burner. What methods are more reasonable to use to monitor the furnace temperature field distribution? Please express your opinions.
At present, infrared thermometers are used more often, but the error is relatively large. Besides, there doesn't seem to be any other better way.
We have been using dual thermocouples for detection in sections. Infrared rays are used to detect the temperature of the big kiln in the cement factory, which is around 2000 degrees.
The distribution of the temperature field in the heating furnace is indeed a difficult point. Currently, it is better to use thermocouples to measure and control the temperature. However, there are many factors that affect the temperature distribution of the furnace, such as the ratio of fuel and the size and shape of the heated workpiece. The distribution of heat will also be affected, so the furnace will be somewhat different under load operation and no-load conditions. Currently, Some factories, such as secondary heating furnaces in steel plants, have also begun to use infrared temperature measurement. Infrared can directly measure the temperature of workpieces. However, due to the influence of the internal structure of the furnace and the type of fuel, it cannot completely replace the thermocouple for the time being. The feasible method is to use both methods, which can better grasp the actual situation of the furnace, but it increases the cost.
The thermal intensity index is an average value, and the distribution of temperature is closely related to the heated medium. When there is a flow of heating medium in the furnace, the temperature field of radiation heat transfer increases with the flow direction of the heating medium and is detected by radial and axial temperature measurement points. Generally measured with thermocouples.
If you are interested, you can take a look at the topic "Using Sound Waves to Measure the Furnace Temperature Field" that I posted. There is an introduction inside.
Combination of temperature measurement and software simulation
The most practical way should be to use a combination of thermocouple measurement and application software simulation-soft measurement method, which can not only better monitor the temperature field distribution in the furnace, but also reduce investment.