BOTTOM-FED STEAM GENERATOR WITH SEPARATOR AND DOWNCOMER CONDUIT

摘要

The present invention relates to a steam generator comprising a substantially- horizontal gas conduit (1) for guiding a heating gas flow and a single pass evaporator unit (3). The evaporator unit has at least one heat transfer section which is positioned at least partially in the heating gas flow (2). The heat transfer section comprises substantially vertically extending heat transfer tubes (22), which are at the lower region in fluid communication with an inlet conduit (7) and at the upper region in fluid communication with an outlet conduit (10). A flow medium is supplied to the inlet conduit (7). The invention is characterized in that the evaporator unit comprises a separator (11) and a downcomer conduit (12).