HOT-WATER BOILER Russian patent published in 2011 - IPC F24H1/16 

FIELD: power industry.

SUBSTANCE: proposed boiler includes vertical furnace, burner installed in furnace, outlet hole, inlet and outlet headers and heating surfaces connected to supply and discharge pipelines and including waterwall and convective parts located in the furnace. Waterwall part is formed with bank of upward arranged spiral tubes. Convective part is formed with bank of spiral tubes interconnected in upper part by means of connection branch pipe with tubes of waterwall part and arranged on them upwards. Tubes of waterwall and convective parts are equipped in next but one manner with spiral finning. Spiral guide triangular profile adjoining its tubes is installed throughout the length of convective part.

EFFECT: improving heat transfer efficiency of heating surfaces at optimum speeds and turbulation of combustion products flow.

3 cl, 11 dwg