PRINCIPLES OF NAVAL ENGINEERING 



IMTERNAL FEED 

 PIPE 



SURFACE BLOW 

 LINE 



FEED WATER OUTLET 



BAFFLE MATERIAL 



PLASTIC CHROME 



SUPERHEATER 



y/t PLASTIC FIREBRICK 



4Vi FIREBRICK 



I'j INSULATING BRICK 



E 



INSULATING BLOCK 



2h" FIREBRICK 



2V!" INSULATING BRICK 



1 INSULATING BLOCK 



I PLASTIC CHROME ORE 



BOTTOM BLOW INSULATING BLOCK 



38.40 



Figure 10-21.— Cutaway view of older single-furnace boiler. 



252 



