Temperature profiles in a lignite flotsam-rich fluidized bed

Abstract

Temperature measurements along the vertical axis of an 11 cm i.d. fluidized bed were successfully used to interpolate the segregation patterns for Can lignite burning in quartz sand. Using differential temperature data the lignite flotsam-rich type segregation patterns were investigated for changes in lignite type, bed materials, particle size, fluidization velocity and static dynamic bed heights. It is concluded that the quality of mixing deteriorates when the lignite particle size, the fluidization velocity and the length of static and dynamic bed heights are each decreased and ash content, density and particle size of bed material increased. These were in accordance with the behaviour of a flotsam-rich type system in which lignite was the flotsam component. In this study the effect of volatile matter content on freeboard combustion was found to be unimportant compared with the effect of changes in the segregation patterns.