流化-输送床中煤的气力分级数值模拟分析

发布时间：2018-06-05 04:19

本文选题：流化床 + 输送床　；参考：《煤炭转化》2017年05期

【摘要】：为提高流化-输送床耦合装置气力分级过程中煤颗粒的品质,采用正交实验法,选择耦合装置的表观气速、进料口位置和进料速率三个参数为因素,每个因素取三个水平,考虑因素之间的交互作用,选取L18(37)正交表得到18组方案.运用计算颗粒流体力学(CPFD)软件,对煤颗粒气力分级过程进行数值模拟,结合气固流化-输送床耦合装置气力分级实验对分级过程进行研究,并以煤颗粒最优分级效率为指标,由极差综合分析法得出,耦合装置的输送床表观气速是影响煤颗粒气力分级的主要因素,输送床表观气速为8.30m/s、进料口位置为输送床下部以及进料速率为22.5kg/(m~2·s)的最优组合.
[Abstract]:In order to improve the quality of coal particles in the pneumatic classification process of the fluidized conveying bed coupling device, the orthogonal test method was used to select three parameters, namely, apparent gas velocity, feed port position and feed rate of the coupling device, with three levels for each factor. Taking into account the interaction of factors, 18 groups of schemes were obtained by selecting L 18N 37) orthogonal table. By using computational particle hydrodynamics (CPFDs) software, the process of coal particle pneumatic classification is numerically simulated, and the classification process is studied by combining the gas-solid fluidization-conveying bed coupling device, and the optimal classification efficiency of coal particles is taken as the index. From the comprehensive range analysis method, it is concluded that the apparent gas velocity of the conveying bed of the coupling device is the main factor affecting the coal particle pneumatic classification. The apparent gas velocity of the conveying bed is 8.30 m / s, the feed inlet position is the lower part of the conveying bed and the feed rate is 22.5kg/(m~2 s.
【作者单位】：煤炭清洁转化与化工过程新疆维吾尔自治区重点实验室新疆大学化学化工学院;
【基金】：国家自然科学基金资助项目(21366032) 新疆维吾尔自治区自然科学基金资助项目(2016D01C035)
【分类号】：TQ051.13;TQ536

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