Patent ID: 6499440
Filing Date: 2002-12-31
Classification: F22B,Y02P

Abstract:
A steam generator, comprising:a combustion chamber for fossil fuel, said combustion chamber having a fuel-gas side; a horizontal gas flue; a vertical gas flue connected, via said horizontal gas flue, on said fuel-gas side to said combustion chamber; said combustion chamber having burners provided substantially on a level with said horizontal gas flue; said combustion chamber having containment walls formed from vertically disposed evaporator tubes welded to one another in a gastight manner; a number of said evaporator tubes being subdivided into a first group and a second group, said first group and said second group of said evaporator tubes to be acted upon in each case in parallel by a flow medium; said second group being provided in series with said first group and downstream of said first group as seen in a direction of flow of the flow medium; said containment walls of said combustion chamber being subdivided into a first region and a second region along a main flow direction of a fuel gas flow; said first region being formed from evaporator tubes of said first group and said second region being formed from evaporator tubes of said second group; and said second region being provided, on said fuel-gas side, between said first region and said horizontal gas flue.