HEATING BOILER Russian patent published in 2004 - IPC

FIELD: water heating; district heating and hot-water supply systems. SUBSTANCE: boiler has cylindrical casing with cylindrical combustion chamber arranged along its axis, both organizing annular water jacket provided with water inlet and outlet pipes; it also has fire bar and ash pit; combustion chamber accommodates additional furnace made in the form of vertical fuel tube with cone fitted coaxially with and under the latter on fire bar, cone base diameter being equal to diameter of fuel tube and angle at its base being equal to that of natural fuel slope. Clearance between fire bar and lower edge of fuel tube is found from equation where h is clearance between fire bar and lower edge of fuel tube; D_c is combustion chamber diameter; D_t is fuel tube diameter; α is angle of natural fuel slope. Fuel tube may be provided with water jacket communicating through branches with casing water jacket. EFFECT: enhanced effectiveness of boiler due to increased completeness of fuel combustion. 2 cl, 1 dwg