HEATING BOILER Russian patent published in 1998 - IPC

FIELD: heating living and industrial rooms; hot water supply systems. SUBSTANCE: boiler has shell in form of water jacket embracing the furnace and gas duct; shell is provided with hollow partitions with heat exchange intensifiers on upper and lower walls which are brought in communication with water jacket forming labyrinth gas passage in gas duct. Mounted at the bottom of furnace is chamber forming closed volumetric loop of heat-transfer agent together with heat transfer loop. Heating surfaces are made in form of heat exchanger elements. Number of heating surfaces ranges from 2 to 4. They are provided with longitudinal passages which are horizontal and diametrically opposite. They are made at different height overlapping each other in furnace space and are connected with heat transfer agent loop. Area of horizontal section and inner height of each passage of heat exchange element are of preset magnitudes. EFFECT: intensification of heat exchange due to uptake flue of combustion products to heat-transfer agent increasing rate of its circulation in heating system through increase of pressure differential at boiler inlet and outlet. 4 cl, 3 dwg