Patent ID: 6067944
Filing Date: 2000-05-30
Classification: F22B,Y10T

Abstract:
An improved furnace floor for use in recovery boiler furnaces having a pair of side tube walls, a front tube wall, a back tube wall and horizontal tubes between the front and back tube walls forming a floor to reduce the occurrence of steam blanketing and humping in the horizontal floor tubes, the furnace floor comprising:at least three sloped tubes connected between at least one of the front and back tube walls and a header, the at least three sloped tubes located immediately adjacent one sidewall and oriented such that the angle each successive tube of the at least three sloped tubes after the first sloped tube nearest the sidewall forms with the horizontal tube floor decreases until the sloped tubes are horizontal, the at least three sloped tubes and the horizontal floor tubes forming a continuous membrane furnace floor between the sidewalls and front and back tube walls.