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首页> 外文会议>International Conference on Biomass Energy Technologies >DETAIL MEASUREMENT OF BED VOIDAGE DISTRIBUTION IN A BIOMASS CIRCULATING FLUIDIZED BED
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DETAIL MEASUREMENT OF BED VOIDAGE DISTRIBUTION IN A BIOMASS CIRCULATING FLUIDIZED BED

机译：细节测量生物质循环流化床中的床上空隙分布

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摘要

Hydrodynamic characteristics of sawdust were investigated in a circulating fluidized bed (CFB) with height of 10m and inner diameter of 0.28m. Experiments were carried out to study the axial and radial distributions of bed voidage along the riser, under the conditions of superficial velocity U_g=1.81～2.26m/s, particle circulation rate G_s=0.62～1.12kg/(m~2.s). Results show that stable operation of the CFB can be obtained if sufficient materials are kept in the downer; particle flow in the riser shows a typical core-annulus structure; average bed voidage increases along with bed height; flow characteristics along the riser of core, transition and annulus area can be obtained by dividing the cross section into three areas with r/R=0～0.71, 0.71～0.93 and 0.93～1.
机译：在循环流化床（CFB）中研究了锯末的流体动力学特性，高度为10米，内径为0.28m。进行实验，以研究沿着立管沿着提升管的轴向和径向分布，在浅表速度U_g = 1.81〜2.26m / s的条件下，粒子循环速率G_s = 0.62〜1.12kg /（m〜2s） 。结果表明，如果保持足够的材料，可以获得CFB的稳定运行;提升管中的颗粒流动显示了典型的芯环结构;平均床间隙随着床高的增加而增加;沿芯，过渡和环形区域的提升器的流动特性可以通过将横截面分成三个区域，以R / R = 0〜0.71,0.71〜0.93和0.93〜1。

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