Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question dated 2020-07-19
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Process Engineering Division – Instrumentation and Automation Section – Daily Question – Question from 2020-07-19: Discussion question: 181. During a shutdown for maintenance of a certain heating furnace, it was found that the thermocouple sheath used to measure the furnace temperature could not be removed. Please analyze what might be the cause of this
This is because the thermocouple protection sleeve bent at the measured temperature. Therefore, when installing temperature sensing elements in high-temperature equipment such as heating furnaces, it is best to install them vertically; if horizontal installation is necessary, then when the insertion depth is greater than 1 meter or the temperature to be measured is above 700 degrees, a support should be used to hold the temperature sensing element in place.
This is because the thermocouple protection sleeve bent at the measured temperature.
As the temperature of the furnace drops during shutdown, the hole in the thermocouple sleeve contracts, thereby trapping the thermocouple sleeve.
This is because the thermocouple protection sleeve bent at the measured temperature. Therefore, when installing temperature sensing elements in high-temperature equipment such as heating furnaces, it is best to install them vertically; if horizontal installation is necessary, a support should be used to hold the element in place when the insertion depth is greater than 1 meter or when the temperature to be measured is above 700°C.
This is because the thermocouple protection sleeve bent at the measured temperature. Therefore, when installing temperature sensors in high-temperature equipment such as heating furnaces, it is best to install them vertically. If horizontal installation is necessary, a support should be used to hold the temperature sensing element when the insertion depth is greater than 1 m or the temperature being measured is greater than 700°C.
The upper section of the furnace casing lacks proper support, resulting in high-temperature deformation