One of the problems encountered in refinery-fire heaters is an imbalance in the heat flux in the individual heater passes. The imbalance can cause high coke formation rates and high tubes metal temperature, which reduce a units capacity and can cause premature failure. Coke formation on the inside of the heater tubes reduces the heat transfer through the tubes, which cause localized heat transfer through the tubes, which leads to the reduced capacity.
With a correct temperature distribution you can reduce the fuel gas. The BOILERWATCH MMPII, Acoustic Pyrometer provides highly accurate temperature measurement of heat exchange and heat transfer performance; and allows monitoring of gas temperature conditions, and alerts plant operators concerning impending failures, reducing the frequency of unplanned shutdowns and Coke formation.
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