Through-flow steam generator has vertical gas flue with the pipes of the lower section smooth on the inside and the pipes of the further wall section adjoining same having thread ribs on inside

摘要

The steam generator has a vertical gas flue (2) formed by gas-tight pipe walls and divided into upper and lower parts (4,5). The overall height of the lower part (4) of the flue is formed by a certain equation and the pipe walls (3) of the lower part are divided into a lower (8) and further pipe wall section (9). The pipes (11) of the lower wall section are smooth on the inside whilst the pipes (12) of the further wall section adjoining same have thread ribs on the inside. The internal cross sections of the pipes (10,11,12) of the base (6), lower and adjoining pipe wall sections are also specifically formed by an equation : The partition (14) in the walls between the lower and upper part of the gas flue runs horizontal.