The analysis of flow property for mixture of coarse and fine granule

• Main Authors: Bo-Jun Wang, 王柏鈞
• Other Authors: Shu-San Hsiau
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/02407330890432177223

碩士 === 國立中央大學 === 能源工程研究所 === 98 === Silica sands are prospective granular filter media in two-stage granular moving bed filters (GMBF) for hot gas cleanup technology. Two filter media, usually coarse sands and fine sands are used in two-stage GMBFs in order to increase their filter efficiency. GMBF developers fear that fine filter media can bring together flowability problems in granular moving bed. Wall friction and internal friction of GFM affects flow patterns and stagnant zones in moving bed of granular filter considerably. Measurements of kinematic wall friction angles of different mixtures of fine sand, coarse sands and fly ash are presented in this thesis. Uncorroded carbon steel, polydur lining, stainless steel and glass specimens are chosen as wall materials for designing referral. A brief description of the test equipment used to measure wall friction together with a method of evaluation of kinematic angle of wall friction is discussed. Measurements of internal friction and flow function of coarse sand and fine sand for designing referral.