垃圾在流化床中燃烧的特性

在一台特别设计的小型流化床燃烧实验台上对垃圾可燃物代表组分进行实验研究 .结果表明 ,干燥的垃圾在床温仅为 50 0℃就能在很短的时间内迅速燃烧 ,产生明亮的火焰 .在本实验条件下 ,床温没有因为实验组分的加入而下降 ,而是随着垃圾的迅速燃烧而急剧升温 ,床温提高 30～ 70℃不等 .垃圾在流化床中燃烧受多种因素的影响 ,并讨论了当物料形状 (整或碎 )、含水量、实验风量 (从 5.5m³/h到 7.5m³/h)等因素变化后对于燃烧气体成分及炉内温度的影响 .在本实验条件下 ,当物料剪碎后会引起炉内温度水平明显提高 ,并使得CO排放量略有下降 .物料含水量增加时会导致炉内温度水平明显下降 .实验风量提高时 ,CO排放量明显减少 .

Combustion Characteristics of Municipal Solid Waste in Fluidized Bed

For the experimental investigation on the combustion characteristics of Municipal Solid Waste(MSW) in Fluidized Bed, a lab scale Fluidized Bed facility was constructed. Single and mixed municipal solid waste burning in Fluidized Bed showed that dry waste can be burnt quickly at the bed temperature of 500 degrees C, and furnace temperature increased about 30-50 degrees C. Many kinds of combustion runs were conducted in this Fluidized Bed combustion facility. The parameters examined were air flow rate(from 5.5 m3/h to 7.5 m3/h), form of fuels(scrap or whole), moisture content and so on. Concentration of CO2, CO, SO2 and NOx in the flue gas were monitored and recorded every 5 seconds. The temperatures along the reactor were recorded every 10 seconds.