Fired heaters are often suffering from high tube metal temperatures and short run lengths. Operators are always worried about hot spots in the furnace. While refineries want to push the heaters hard, the heater starts coking up and very soon, the heater tubes have to be cleaned.
FIS has done extensive research and CFD modelling of heaters in the recent time and has concluded that localized burner flame and hot flue gas currents are responsible for the hot spots on the tubes. FIS has now developed a new patented technology for solving hot spot problems. This technology called Inclined Firing Technology involves orienting the burners at an angle on the floor / wall/ roof to direct the flame away from the tubes. The results of this technology have been extremely good and with a very low investment, the reliability and run length of the heater is improved significantly.