Experimental study on combustion characteristics of distilled spirit lees in fluidized bed

The ash composition, ash fusion point, and ignition temperature of distilled spirit lees were measured using X ray fluorescence spectrophotometer, ash fusion point determination meter, and thermo-gravimetric analyzer, while a combustion test carried out on a small-size fluidized bed test setup so as to study the ignition, sintering and NO_x emission characteristics of distilled spirit lees with different moisture contents. Results show that, the content of K₂O and Na₂O in the ash is very low, which in total is only 4.936%; the softening temperature of the ash is relatively high, being more than 1290°C; dried lees has relatively high content of volatiles and can ignite at 250°C; when the mean particle size of quartz sand is 300 μm and the fluidizing velocity within the bed is greater than 0.36 m/s, the fluidizing condition is good; at 900°C, distilled spirit lees burns in quartz sand fluidized bed without sintering phenomenon; at different combustion temperatures, the mass concentration of NO_x emission is high, which increases with the rise of combustion temperature; distilled spirit lees can burn in quartz sand fluidized bed with good burnout effect.