BOILER FURNACE Russian patent published in 2003 - IPC

FIELD: boiler equipment for small-scale thermal engineering equipment, municipal economy, industry, agriculture. SUBSTANCE: furnace comprises combustion chamber with fire-grate located in lower part thereof. Fire-gate communicates with air duct. Combustion chamber roof may be moved in vertical direction and has screws. Screws lower ends are fixedly connected to combustion chamber roof. Screws upper ends pass through openings of fixed brackets and are held by free-rotational nuts. Movable tube lower end is fixedly connected to combustion chamber roof. Movable tube upper part can move relative fixed tube. Fixed tube end is used for supplying of gases to boiler heat-exchanging surface. h₃≥h₂>h₁, where h₃ is fixed tube height, h₂ is movable tube height, h₁ is roof span height. EFFECT: furnace simplified structure. 1 dwg