Sekito Tomoo, Tanaka Nobutoshi, Matsuto Toshihiko
Civil and Environmental Engineering Department, University of Miyazaki, 1-1, Gakuen Kibanadai Nishi, Miyazaki 889-2192, Japan.
Waste Manag. 2006;26(11):1246-52. doi: 10.1016/j.wasman.2005.09.012. Epub 2005 Nov 9.
A gas-solid fluidized bed separator using various bed materials was used to separate shredded municipal bulky waste (SBW). Using 290 microm glass beads as the bed material, the apparent density of the fluidized bed was 1.5 g/cm(3) and the SBW could be separated into combustibles such as wood, paper and plastics and incombustibles such as metals and glass. The overall efficiency (Newton's efficiency) of the separation was calculated to be 0.93. In order to obtain high efficiency, the superficial velocity must be adjusted so that the fluidized bed is agitated moderately and at the same time there is no weak fluidized region. Using a mixture of particles of nylon shot and 68 microm glass beads, the apparent density of the fluidized mixture bed could be varied between 0.63 and 0.99 g/cm(3) by changing the mixing ratio of the two materials. In the case of a mixing ratio of 20% for glass beads, an apparent density of 0.65 g/cm(3) was produced, in which wood and paper components were recovered while plastics remained in the bed to give a final overall efficiency of 0.88.
一种使用各种床层材料的气固流化床分离器被用于分离切碎的城市大件垃圾（SBW）。以290微米的玻璃珠作为床层材料时，流化床的表观密度为1.5克/立方厘米，并且城市大件垃圾能够被分离成诸如木材、纸张和塑料等可燃物以及诸如金属和玻璃等不可燃物。该分离的总效率（牛顿效率）经计算为0.93。为了获得高效率，必须调节表观气速，以便适度搅动流化床，同时不存在弱流化区域。使用尼龙弹丸颗粒和68微米玻璃珠的混合物，通过改变两种材料的混合比例，流化混合床的表观密度可以在0.63至0.99克/立方厘米之间变化。在玻璃珠混合比例为20%的情况下，产生的表观密度为0.65克/立方厘米，其中木材和纸张成分被回收，而塑料留在床中，最终总效率为0.88。
