Process for operating a yellow flame burner

Abstract

The invention relates to a process for operating a yellow flame burner, wherein the fuel comprises a Fischer-Tropsch product which contains more that 80 wt % of iso and normal paraffins, less than 1 wt % aromatics, less than 5 ppm sulfur and less than 1 ppm nitrogen and wherein the density of the Fischer-Tropsch product is between 0.65 g/cm 3 and 0.8 g/cm 3 at 15 ° C.

1 . A process for operating a yellow flame burner comprising: 
 burning a Fischer-Tropsch derived fuel in the burner to obtain flue gases and a flame.    
     
     
         2 . The process of  claim 1 , wherein lambda is between 1 and 1.6  
     
     
         3 . The process of  claim 2 , wherein lambda is between 1.05 and 1.2.  
     
     
         4 . The process of claims  1 , further comprising heating water by means of indirect heat exchange with the flue gasses in a boiler.  
     
     
         5 . The process of claims  1 , further comprising heating a space directly with the flue passes.  
     
     
         6 . The process of  claim 1 , wherein the Fischer-Tropsch derived fuel boils for more than 90 wt % between 160° C. and 400° C.  
     
     
         7 . The process of  claim 6 , wherein the Fischer-Tropsch derived fuel boils for more than 90 wt % between 160° C. and 370° C.  
     
     
         8 . The process of claims  1 , wherein the Fischer-Tropsch derived fuel comprises a Fischer-Tropsch product which contains more than 80 wt % of iso and normal paraffins, less than 1 wt % aromatics, less than 5 ppm sulfur and less than 1 ppm nitrogen and wherein the density of the Fischer-Tropsch derived product is between 0.65 and 0.8 g/cm 3  at 15° C.  
     
     
         9 . The process  claim 1 , wherein the Fischer-Tropsch derived fuel comprises more than 80 wt % of a Fischer-Tropsch product.  
     
     
         10 . The process of  claim 9 , wherein the Fischer-Tropsch derived fuel comprises a mineral oil fraction and/or a non-mineral oil fraction.  
     
     
         11 . The process claims  1 , further comprising starting the yellow flame burner more than three times per hour.  
     
     
         12 . The process of  claim 1 , wherein the Fischer-Tropsch derived fuel comprises one or more additives.  
     
     
         13 . The process of  claim 12 , wherein the Fischer-Tropsch derived fuel comprises an odor marker.  
     
     
         14 . The process of  claim 12 , wherein the Fischer-Tropsch derived fuel comprises a color marker.  
     
     
         15 . The process claims  12 , wherein an additive is present which changes the color of the flame such that is detectable by a yellow flame detector.  
     
     
         16 . The process of  claim 1 , wherein a blue flame detector is used to detect the yellow flame burner flame.  
     
     
         17 . The process of  claim 16 , further comprising detecting the flame of the yellow flame burner with an ionization type flame detector and wherein the fuel does not contain a metal-based combustion improver.