酒糟在流化床中燃烧特性的试验研究

利用X射线荧光光谱仪、灰熔点仪和热重分析仪等对酒糟的灰成分、灰熔点及着火温度进行了测试,并在小型流化床试验台上进行了酒糟燃烧试验,对不同含水率酒糟的着火特性、烧结特性和NOx排放质量浓度进行了研究.结果表明:酒糟灰中K2O和Na2O的含量很低,只有4.936%;酒糟灰的软化温度较高,高于1 290℃;干燥酒糟的挥发分较高,高于250℃就能够着火燃烧;当石英砂的平均粒径为300μm、流化床内的流化速度大于0.36m/s时,流化状况良好;在900℃下,酒糟在石英砂流化床中燃烧不会出现烧结现象;在不同的燃烧温度下,NOx排放质量浓度均较大,且随着燃烧温度的升高而增大;酒糟可以在石英砂流化床中燃烧,且燃尽效果良好.

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 NOx 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 1 290 ℃;dried lees has relatively high content of volatiles and can ignite at 250 ℃;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 ℃,distilled spirit lees burns in quartz sand fluidized bed without sintering phenomenon;at different combustion temperatures,the mass concentration of NOx 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.