FLAME-TUBE HOT-WATER BOILER Russian patent published in 2013 - IPC F22B7/00 

FIELD: heating.

SUBSTANCE: in a flame-tube hot-water boiler containing a housing closed on the front side with a bottom with a hole and a neck for installation of a burner, on the rear side with a tube sheet, inside which there arranged is a flame tube having front and rear bottoms, and smoke tubes located along concentric circles coaxially to the flame tube, the outlet ends of which are fixed in holes of the tube sheet carrying on the outer side a flue gas duct connected to a stack; inlet ends of smoke tubes are bent and fixed in holes of the front bottom and (or) holes located along the flame tube perimeter. Due to such a configuration, in the boiler design in the flow direction of combustion products there are no surfaces participating in heat transfer to heated water, and in particular, a turning chamber, and flue gas turn occurs immediately in smoke tubes.

EFFECT: at existing heat capacity of the boiler, overall dimensions and the weight of the latter are reduced; use efficiency of the boiler surfaces is increased for the heat exchange process; labour intensity of boiler manufacture and assembly is decreased.

1 dwg