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OwnerThoralf Berndt, Qiurong Chen +2inventors
InventorsThoralf Berndt, Qiurong Chen, Georg-nikolaus Stamatelopoulos, Gerhard Weissinger
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The invention relates to a forced-flow steam generator for burning dry brown coal without assistance from recirculated waste gas in the combustion chamber thereof. Said forced-flow steam generator (1) comprises a combustion chamber (2) and a waste gas flue (3) connected to the upper end thereof, and peripheral walls (4) surrounding said flue. Said walls (4) are formed from tubular walls (5), the tubes thereof guiding the water/steam working medium. The combustion chamber (2) comprises at least one burner (6), and downstream heating surfaces (7) are arranged in the waste gas flue (3). Part of the peripheral walls (4) is covered in the region of the combustion chamber (2) by at least one bulkhead heating surface (8), the size of which on the surface side being determined such that the heat absorption of the peripheral walls (4) and therefore the temperature thereof are reduced to a value enabling the formation of the peripheral walls (4) from modified, heat-resistant 2.25-2.5% chrome steel that does not require any heat aftertreatment following the welding treatment thereof.
A once-through steam generator for burning dry brown coal without the aid of recycled flue gas in its combustion chamber, the once-through steam generator (1) having a combustion chamber (2), a flue gas pass (3) which adjoins the upper end of said combustion chamber (2), and enclosure walls (4) which enclose them, the enclosure walls (4) being formed from tube walls (5), the tubes of which conduct the working medium water/steam, the combustion chamber (2) having at least one burner (6), and heating surfaces (7) being arranged in the flue gas pass (3), part of the enclosure walls (4) being covered in the region of the combustion chamber (2) by at least one platen heating surface (8), the surface-side size of which is defined such that the heat absorption of the enclosure walls (4) and, as a consequence, their temperature are reduced to a value which permits the configuration of the enclosure walls (4) from modified, heat-resistant 2.25-2.5% chromium steels which do not require any thermal post-treatment after they have been processed using welding technology.
Dependencies are inferred from the claim text.