Steam boiler

摘要

A steam boiler includes a boiler housing. A helical coil for boiling water and superheating the wet steam is disposed within the boiler housing. A burner emits combustion gases which heat a heat emitter which is disposed in the inner space of the helical coil. Combustion gases from the burner enter the internal cavity of the heat emitter and then pass through perforations in the heat emitter before contacting the helical coil. As such, the heat emitter is heated by the combustion gases and serves as a radiant heat source for the helical coil.

主权项

1. A steam boiler, comprising:
a boiler housing; a helical coil disposed within said boiler housing, said helical coil having a feedwater input end for inputting feedwater and an opposite steam output end for outputting steam, said helical coil defining an inner space; a burner which emits combustion gases into said boiler housing; a feedwater pump for supplying feedwater to said helical coil; a heat emitter having a plurality of perforations and an internal cavity, said heat emitter disposed within said inner space of said helical coil between said helical coil and said burner, so that said combustion gases from said burner are received by said internal cavity and pass though said plurality of perforations before contacting said helical coil, said heat emitter not part of said burner; said burner outputting heated combustion gases into said internal cavity of said heat emitter; and, said heat emitter converting heat in said combustion gases into radiant heat which heats said helical coil.