Roof space temperature measurement
Thread Content
According to traditional procedures, the temperature measurement in the furnace top space is done using thermocouples, with the cold junction temperature taken into account. Currently, most coking plants use an iron tube inserted from the coal loading hole into the space above the furnace top, with a thermometer used to measure the temperature of the inner wall of the iron tube. Are there any differences in the measurement results between these two methods? Can the temperature of the inner wall of the tube replace the temperature of the space above the furnace?
For our vaporization furnace, which operates at a temperature of 1300 degrees, we also use a high-temperature thermocouple; however, it can only provide an approximate reading, as the thermocouple cannot be inserted too far in
No, there is a temperature difference between the space above the furnace and the inner wall of the iron tubes. If you conduct multiple measurements and manage to determine an empirical value for this difference, and use it to adjust the temperature of the inner wall of the iron tubes, then that temperature can be approximated as the temperature of the space above the furnace.
How to correct it? Based on experience, what is the typical value for the correction amount in degrees?
Models need to be created to determine the relationship between temperature distribution in order for substitution to be possible; otherwise, substitution is not feasible. That design is there to prevent damage
Measure the temperature of the furnace top space several times directly with thermocouples, and also measure it with an iron tube; take the difference
The difference between the two exists, but it’s not clear which one represents the actual temperature value