Continuous steam generator
AssigneeSiemens Aktiengesellschaft
InventorsRudolf Kral, Andre Schrief, Frank Thomas
Life of this patent
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Abstract
A steam generator comprising a combustion chamber having funnel-shaped side walls in the bottom area thereof and an encircling wall formed from a plurality of steam generator pipes through which a flow medium can flow, wherein there area as little temperature differences as possible in the flow medium at the output of the steam generator pies. The steam generator pipes are, more particularly, arranged in the lower section forming the funnel-shaped side walls such that they are exposed to heat in as homongenous a manner as possible. According to the invention, the diameter of a number of steam generator pipes in the region of the funnel shaped side walls is different from that in the region of the encircling wall.
Claims15
A steam generator, comprising:
- a combustion chamber having funnel shaped side walls, a bottom area, and a top area;
- a plurality of steam generator pipes, connected together by fins, at least one of the pipes having a diameter at the bottom area that is different than a diameter at the top area;
- an encircling wall arranged between the bottom and top areas and above the funnel shaped side walls formed from the plurality of steam generator pipes;
- a flow medium that flows through the steam generator pipes;
- a center axis A, positioned at the center of the encircling wall and extending parallel to the direction of flow of the flow medium,
- wherein the outermost steam generator pipes which are the greatest distance from the center axis A are arranged over the entire height of the funnel shaped side walls both with non-reduced pipe diameter and a non-reduced fin width,
- wherein inner most steam generator pipes with the smallest distance from the center axis A have a reduced pipe diameter and reduced fin width, and
- steam generator pipes arranged between the outermost and the innermost steam generator pipes form a transition having a first section with reduced pipe diameter and reduced fin width and a second section with non-reduced pipe diameter and non-reduced fin width.
A combustion chamber that combusts a fossil fuel for the generation of steam, comprising:
- a top area and a bottom area where the bottom area is sized and configured for removal of accumulated ash;
- a lower portion having funnel shaped side walls arranged between the top and bottom areas;
- a plurality of steam generator pipes, connected together by fins, at least one of the pipes having a diameter at the bottom area that is different than a diameter at the top area;
- an encircling wall arranged between the bottom and top areas and above the funnel shaped side walls formed from the plurality of steam generator pipes;
- and
- a flow medium that flows through the steam generator pipes that is heated;
- and
- a center axis A, positioned at the center of the encircling wall and extending parallel to the direction of flow of the flow medium,
- wherein the outermost steam generator pipes which are the greatest distance from the center axis A are arranged over the entire height of the funnel shaped side walls both with non-reduced pipe diameter and a non-reduced fin width,
- wherein inner most steam generator pipes with the smallest distance from the center axis A have a reduced pipe diameter and reduced fin width, and
- steam generator pipes arranged between the outermost and the innermost steam generator pipes form a transition having a first section with reduced pipe diameter and reduced fin width and a second section with non-reduced pipe diameter and non-reduced fin width.
Dependencies are inferred from the claim text.