| 摘要 |
The invention relates to a steam generator (1) wherein a continuous evaporating heating surface (8) is disposed in a heating gas duct (6) through which a heating gas flows in an approximately horizontal manner (x). Said continuous evaporating heating surface (8) comprises a plurality of steam-generating pipes (12) which are connected in a parallel manner enabling flowthrough of a flow medium (W), and is configured in such a manner that a steam-generating pipe (12) which is heated more than another stream-generating pipe (12) of the same continuous evaporating heating surface (8) has a higher throughput of the flow medium (W) compared to the other steam-generating pipe (12). The aim of the invention is to produce a particularly low-cost steam generator exhibiting particularly high mechanical stability with different thermal loads.According to the invention, the or each steam-generating pipe (12) respectively comprises a riser pipe piece (24) which can be cross-flown in an upward direction and which is arranged in an approximately vertical manner in relation to the flow medium (W); a down pipe piece (26) which can be cross-flown in a downward direction downstream from said flow medium side and another riser pipe piece (28) which can be cross-flown in an upward direction by a flow medium (W) and which is arranged in an approximately vertical manner downstream from the latter flow medium side. Preferably, the other riser pipe piece (28) of the respective steam-generating pipe (12) is arranged in the heating gas duct (6), when seen in the direction of the heating gas (x), between the riser pipe piece (24) associated therewith and the down pipe piece (26) associated therewith.
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