Continuous steam generator

Abstract

A continuous steam generator is provided. The continuous steam generator includes a combustion chamber having a number of burners for fossil fuels, downstream of which a vertical gas duct is mounted, on the hot gas side, in an upper region above a horizontal gas duct. The outside wall of the combustion chamber is formed, in a lower region, from evaporation tubes welded together in a gas-tight manner and mounted upstream of a water separator system, on the flow medium side, and in an upper region, from superheater tubes welded together in a gastight manner and mounted downstream of the water separator system on the flow medium side. The boundary between the regions of the evaporation tubes and the superheater tubes is essentially horizontal around the combustion chamber, in a region of the bottom of the horizontal gas duct.

1 .- 3 . (canceled) 
     
     
         4 . A continuous steam generator, comprising:
 a combustion chamber including a plurality of burners for fossil fuel;   a vertical gas duct, disposed downstream of the combustion chamber and mounted in an upper region on a hot gas side above a horizontal gas duct;   the horizontal duct;   a plurality of evaporator tubes;   a plurality of superheater tubes; and   a moisture separation system,   wherein a surrounding wall of the combustion chamber is formed, in a lower region, from the plurality of evaporator tubes welded together in a gas-tight manner and mounted upstream of a moisture separation system on a flow medium side and in an upper region, from the plurality of superheater tubes welded together in a gas-tight manner and mounted downstream of the moisture separation system on the flow medium side,   wherein part of the surrounding wall facing the vertical gas duct is inclined inward below the horizontal gas duct, thereby forming with a first bottom of the adjacent horizontal gas duct a projection extending into the combustion chamber, and   wherein a boundary between the regions of the evaporator tubes and the plurality of superheater tubes is disposed directly above the projection in an essentially horizontally circumferential manner around the combustion chamber in a region of the bottom of the horizontal gas duct.   
     
     
         5 . The continuous steam generator as claimed in  claim 5 , wherein the boundary between the regions of the plurality of evaporator tubes and the plurality of superheater tubes is disposed in an essentially horizontally circumferential manner around the combustion chamber at a level of an edge formed by the surrounding wall and a second bottom of the horizontal gas duct. 
     
     
         6 . The continuous steam generator as claimed in  claim 5 , wherein the second bottom of the horizontal gas duct is formed of the plurality of evaporator tubes welded together in a gas-tight manner upstream of the moisture separation system on the flow medium side.