VERTICAL WATER-TUBE WATER BOILER Russian patent published in 2000 - IPC

FIELD: boiler houses. SUBSTANCE: boiler has inlet annular header incorporating inner transverse partitions mounted either side of water inlet pipe connection between holes for welding-in tubes; other annular header coupled with the former through heat-transfer tubes mounts opposing inner transverse partitions arranged in staggered manner for multiple upflow and downflow of water over all heat-transfer tubes in sequence at speed preventing surface water boiling up to water outlet pipe connection of upper annular header. In addition, gas vent through which fire gases escape from furnace to convective surfaces of boiler is located at cold water inlet; outlet gas pipe of boiler is located at hot water outlet. EFFECT: improved reliability and service life of heat-transfer tubes and boiler as a whole. 2 cl, 3 dwg