Patent ID: 9038577
Filing Date: 2015-05-26
Classification: F22B,F23C

Abstract:
1. 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.