HIGH TEMPERATURE SUB-CRITICAL BOILER WITH STEAM COOLED UPPER FURNACE
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United States of America Patent
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Apr 5, 2016
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Apr 5, 2016
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Abstract
A boiler is disclosed in which the furnace is divided into a lower furnace and an upper furnace. The lower furnace uses water-cooled membrane walls, while the upper furnace uses steam-cooled membrane walls that act as superheating surfaces. A transition section is present between the lower furnace and the upper furnace. The boiler is a high temperature sub-critical natural circulation boiler which is completely top supported. The lower furnace is supported through the transition section by the upper furnace.
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