CAST-IRON WATER BOILER Russian patent published in 2000 - IPC

FIELD: heating individual dwelling houses. SUBSTANCE: boiler has furnace enclosed by double-wall bottom with water passage in-between that communicates with water channel of furnace, and also water heating section mounted on square surface of furnace and carrying, accordingly, square-section upper double-wall section with hole connected to heating system as well as pipe connection for communication with flue. Section is provided with access holes for cleaning partition surfaces which are held closed in the course of operation with waterwall covers; two hollow partitions are fitted between inner sections of each water boiling section wherein they are inclined through 2 deg. in opposite directions to provide free space which, together with space between heat-transfer surfaces, forms zigzag-shaped gas passage. EFFECT: improved economic efficiency of boiler. 2 cl, 4 dwg