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本文建立了横截面200 mm×200 mm,高1200 mm三维冷态流化床实验装置,实验研究非球颗粒形状效应对其混合特性的影响.针对异型颗粒外形差异和尺寸区别,分别设计两组实验,从固体废弃物颗粒特性方面研究其在流化床内的混合规律,重点考察了颗粒自身形状、尺寸对混合质量的影响,并结合颗粒混合动态过程进行研究.结果表明,颗粒球形度越大,在流化床内混合质量越好;密度较大的非球颗粒,其混合质量受形状影响更加明显;非球形颗粒种类增加,混合质量变差,流化气速的适当提高可改善混合质量;低密度非球颗粒及其混合物在床内混合表现出浮升组分特性,受形状影响不明显.
In this paper, a three-dimensional cold fluidized bed experimental apparatus with a cross-section of 200 mm × 200 mm and a height of 1200 mm was established to study the influence of the shape effect of the non-spherical particles on the mixing characteristics of the particles.According to the shape difference and size difference of the shaped particles, In the experiment, the mixing law of solid waste particles in fluidized bed was studied, and the influence of particle shape and size on the mixing quality was investigated emphatically, and the dynamic process of particle mixing was studied. The results showed that the sphericity of particles Large, the better the quality of mixing in the fluidized bed; the density of the larger non-spherical particles, the mixing quality is more obvious by the shape; non-spherical particles increased, poor mixing quality, the appropriate increase of the fluidized gas velocity can improve the mixing Quality; low-density non-spherical particles and their mixture in the bed mixture showed buoyant component characteristics, the shape of the impact is not obvious.