Evaporator surface structure of a circulating fluidized bed boiler and a circulating fluidized bed boiler with such an evaporator surface structure
AssigneeFoster Wheeler Energia Oy
InventorPentti Lankinen
Life of this patent
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Abstract
An evaporator surface structure of a circulating fluidized bed boiler having a furnace that is enclosed by sidewalls and has a bottom and a ceiling. The evaporator surface structure includes at least one vertical and separate evaporator surface unit that is spaced apart from the sidewalls of the furnace. The at least one evaporator surface unit (i) is formed of planar water tube panels that extend from the bottom of the furnace to the ceiling of the furnace, and (ii) consists of two cross-wise joined vertical water tube panels.
Claims21
An evaporator surface structure of a circulating fluidized bed boiler, the evaporator surface structure comprising:
- a furnace that is enclosed by sidewalls and has a bottom and a ceiling;
- and
- at least one vertical evaporator surface unit that is separate from and spaced apart from the sidewalls of the furnace, the at least one evaporator surface unit (i) being formed of planar water tube panels, formed by joining a group of water tubes by means of fins, that extend from the bottom of the furnace to the ceiling of the furnace, and (ii) consisting of two water tube panels that are connected to each other in a cross-wise configuration, wherein the water tube panels in each evaporator surface unit are suspended to hang from separate outlet headers arranged at different heights parallel with the water tube panels.
A circulating fluidizing bed boiler comprising:
- (a) a furnace that is enclosed by sidewalls and has a bottom and a ceiling;
- and
- (b) an evaporator surface structure comprising:
- at least one vertical evaporator surface unit that is separate from and spaced apart from the sidewalls of the furnace, the evaporator surface unit (i) being formed of planar water tube panels, formed by joining a group of water tubes by means of fins, that extend from the bottom of the furnace to the ceiling of the furnace, and (ii) consisting of two vertical water tube panels that are connected to each other in a cross-wise configuration, wherein the water tube panels in each evaporator surface unit are suspended to hang from separate outlet headers arranged at different heights parallel with the water tube panels.
Dependencies are inferred from the claim text.