Patent ID: 6491000
Filing Date: 2002-12-10
Classification: F22B,F23C,F23M,Y10S

Abstract:
A tube wall section for a circulating fluidized bed boiler having a refractory covering, the tube wall section including a plurality of tubes arranged parallel to each other forming a wall, at least one side of the wall of tubes being an interior wall, each tube comprising:an upper tube section having a first diameter, the side of the upper tube section forming the interior wall defining a solids fall line; a reduced diameter tube section having a second diameter which is smaller than the first diameter; an eccentrically swaged tube section connected between the upper tube section and the reduced diameter tube section; a plurality of membrane bars connecting the upper tube sections of each of the plurality of tubes; and refractory means mounted over the plurality of tubes and covering at least a part of the swaged tube portion and reduced diameter portion of each tube, the upper edge of the refractory means being outside the solids fall line.