258 



DEVELOPMENTS IN OIL BURNING. 



increase in height and volume in the direction of the entering oil spray and 

 thus providing room for the expansion and diffusion of the gases; small 

 amount of boiler heating surface exposed, and, on the contrary, large exposed 

 surface of incandescent refractory material, thus tending to maintain high 

 furnace temperature and promote complete and rapid combustion of the oil ; 

 tubes almost parallel with path of the oil spray injected into the furnace from 



'f-S 



Fig. 10. — FuRNACB of Babcock & Wilcox Boiler. 



the front, thus promoting proper distribution of the gases along the tubes and 

 preventing local overheating; outlet from the furnace at the point most 

 remote from the location of the atomizers, thus insuring long travel of the 

 gases; and, finally, means for bringing the heated products of combustion into 

 the closest possible contact with the entire amount of heating surface of the 



