FOSSIL-FIRED CONTINUOUS-FLOW STEAM GENERATOR

摘要

The invention rotates to a fossil fuel fired continu- ous-flow steam generator (2) with a gas turbine combustion chamber (4) for fossil combustibles (B). On the heating gas side a vertical gas extractor (8) is mounted downstream of the horizontal gas extractor (6). The walls (9) surrounding the combustion chamber (4) are composed of evaporator tubes (10) which are welded together and vertically arranged. The aim of the invention is to provide a continuous-flow steam generator (2) which is especially easy to produce and assemble. During operation of the continuous-flow steam generator the tempera- ture differences between adjacent evaporator tubes (10) of the combustion chamber (4) shall be kept as low as possible. To this end, the continuous-flow steam generator (2) is provided with a number of burners (30) which are arranged in the com- bustion chamber (4) at the level of the horizontal gas extractor (6). Also, for a number of evaporator tubes (10) which can be simultaneously impinged by the flow medium (S) the quotient from the steam generating capacity M (indicated in kg/s) at full load and from the sum A (indicated in m2) of the inner cross-sectional surfaces of said evaporator tubes (10) impinged simultaneous ly by the flow medium (S) is less than 1350 (unit kg/sm2).