Disclosed is a steam generator in which a continuous evaporating heating
area is disposed within a heating gas duct that is penetrated in a nearly
horizontal direction by a heating gas. Said continuous evaporating
heating area comprises a number of steam-generating pipes that are
connected in parallel and are penetrated by a flowing medium and is
configured such that a steam-generating pipe which is heated more than
another steam-generating pipe of the same continuous evaporating heating
area has a higher throughput of the flowing medium than said other
steam-generating pipe. The aim of the invention is to create a steam
generator which provides a particularly high degree of stability of flow
during operation of the continuous evaporating heating area while keeping
the structural complexity and design comparatively simple. Said aim is
achieved by means of a discharge collector which is mounted downstream of
the steam-generating pipes of the continuous evaporating heating area on
the side of the flowing medium, and the longitudinal axis of which is
located essentially parallel to the direction of the heating gas.