Steam Boiler Offering you a complete choice of products which include wet back design gas fired boiler, hybron skid mounted boiler, urjex make external furnace steam boiler, agro waste fired steam boiler, three pass steam boiler and fully automatic steam boiler. Wet Back Design Gas Fired Boiler
The surrounding water absorbs burner heat, helping improve operating efficiency as heat from combustion goes directly into evenly heating water instead of refractory. The wet back boiler design uses separate tube sheets between tube passes which can be more forgiving with load changes.
The wetback boiler design features a reversal chamber that is jacketed, or completely surrounded by water, which is used to direct flue gasses from the furnace to the tube banks. The surrounding water absorbs burner heat, helping improve operating efficiency as heat from combustion goes directly into evenly heating water instead of refractory.
· PDF fileAs indicated in the drawing, a three-pass wetback design has a rear water wall, which separates the primary heating surface of the combustion chamber from the rear tube sheet. The water jacket eliminates the need for a refractory wall and rear door swing space behind the boiler, as well as costly refractory maintenance.