| Summary: | 碩士 === 國立臺灣大學 === 化學工程學研究所 === 89 === Abstract
To study the compression and deformation behavior of a single compressible soft sphere and a layer of these ones , the compression of compressible soft particles in the packed bed by hydraulic drag,and the formation of filter cake of compressible soft particles were conducted. It was found that since the single compressible soft sphere was compressed, the lateral expansion was much less than that in normal direction, and it was found that the compression process showed a retardation phenomena. In the packed bed test, due to the compressibility of the Ca-alginate particles, the clogging in the porous media was less intensive as compared to the incompressible soft particle, Konjac(蒟蒻). Besides, for Konjac particles, the tight skin layer formed on the surface of medium, which almost total pressure drop occurs as fluid flow through this layer. It was also observed that the behavior of the compressible Ca-alginate particles bed under hydraulic pressure showed the retardation phenomena during the compression of the bed.
From the filtration curves drawn after the constant-pressure filtration experiments, 4 stages during the process of filtration of compressible soft particles were found . The trend shown by it was so different from the straight-line relation of rigid particles and mono-upgrade relation of incompressible soft particles.
Keywords： compressible soft particles, retardation phenomena, skin layer
|
|---|
