FIELD: heat and power engineering, possible use in once-through steam generators which produce steam for steam turbines.
SUBSTANCE: in accordance to the invention, steam generator comprises evaporating once-through heating surface (8), which contains a certain number of steam generator pipes (12), coupled in parallel for passage of flowing substance, and which is engineered in such a way, that steam generator pipe (12) which is overheated compared to another steam generator pipe (12) of the same evaporating once-through heating surface (8), has higher flow of flowing substance compared to another steam generator pipe (12). At the same time, one or every steam generator pipe (12) contains an appropriately positioned, approximately vertically, lifting pipe section (24), by which flowing substance passes in ascending direction, lowering pipe section (26), positioned approximately vertically and by which flowing substance passes in descending direction, next lifting pipe section (28), positioned approximately vertically and by which flowing substance passes in ascending direction, where next lifting pipe section (28) of corresponding steam generator pipe (12) is positioned inside the fuel gas channel (6) when viewed in direction of fuel gas between attached lifting pipe section (24) and attached lowering pipe section (26).
EFFECT: reduced manufacturing costs of steam generator which has high mechanical stability at various thermal loads.
8 cl, 1 dwg
