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

FIELD: heating and water-supply systems. SUBSTANCE: water-heater boiler has furnace with burner device, vertical cluster of fire tubes, expansion tank with feeding branch pipe and return branch pipe. Fins dividing boiler section into two parts, external and internal ones, are installed in lower part of fire tube. External water flow rises along external part and internal water flow rises along internal part. Mixer is positioned in upper part of boiler, and residual steam distributor is mounted in lower part of expansion tank. Division of boiler volume into external and internal parts by fins improves water circulation in boiler, and installation of mixer promotes more effective condensation of steam. EFFECT: improved design. 2 dwg