HOT-WATER BOILER Russian patent published in 2002 - IPC

FIELD: heating water; heating systems. SUBSTANCE: hot-water boiler has water-walled furnace and convective part which are arranged horizontally in succession in one unit and are divided by vertical partition provided with slag screen in lower portion which is inclined towards rear wall of boiler. Lower sections of tubes of slag screen are brought apart at level of hearth of furnace for forming ports for air nozzles directed towards boiler front at angle of 15-30 deg. Relative to level. Convective part includes at least one uptake gas duct and one downtake gas duct with openings in partitions dividing them; convective heating surfaces are located in these gas ducts. EFFECT: enhanced efficiency. 2 dwg