Tube skin temperature measurement
in a steam-cracking furnace for ethylene production
One of the main processes in the petrochemical industry is the steam cracking. The heart of the process is the cracking furnace, where high amounts of energy are given to tube coils by the burners. Accurate temperature measurements at multiple points in the furnace sections allow continuous monitoring of furnace performance in terms of energy consumption compared to heat transferred to the process fluids, and tube life monitoring for predictive maintenance.
Benefits
Overheating detection
Preventing the accumulation of coke in pipes and its negative effects
Increased life span of the tubes
Regulation of the burners feeding based on temperature measurements leads to substantial energy savings
Increased process efficiency & product quality
The challenge
Due to inaccessibility, high temperatures and potential damage, a conventional direct temperature measurement of the medium inside the tube is not possible. A tube skin thermocouple assembly enables the accurate measurement of the outer tube surface in a steam cracking furnace. Another important factor for accurate measurement is to protect the sensor from external thermal effects, mainly the heat coming from the burners.
Our solution
For this application, the TC thermometer TC65 was designed and specifically customized according to customers’ requirements to ensure optimal continuity between the sensor and the process fluid and the least influence from the environmental temperature of the furnace.
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