中文摘要：

采用离散元法对生石灰卸料过程的流动特性和规律进行了数值模拟并在自行设计的玻璃料仓上进行了实验研究。结果表明,石灰卸料过程中,先整体流动,后管状流动;料仓中心部位的石灰颗粒流速比侧壁处大,下部比上部大,出料口处速度最大;石灰粒径越大,下料稳定性越差;料斗底部的流化气对下料稳定性和下料流率有重要影响,对于不同的粉体容量,存在最佳流化气位置区间和最佳流化气表观气速范围;增加进气压力能提高生石灰下料流率,改善下料稳定性,阻止气压平衡拱生成。

英文摘要：

The numerical simulation of flow characteristics and regularities of pulverized quicklime discharge process is made using the discrete element method,and the experimental study is conducted on a self-designed glass-made silo. The results show that,in the discharge process of quicklime,it flows as a whole at first and then flows as a tube; the flow rate in the center of the bunker is higher than the rate on the side walls and that on the lower part is higher than that on the upper part and the flow rate is the highest at the outlet; the larger the lime particle size is,the worse the stability of material feeding is. The aeration gas at the bottom of the material hopper has significant influence on material feed stability and feed rate. For different powder volume,there exists optimum aeration gas position and optimum apparent gas rate range of aeration gas. Increasing incoming air pressure can increase lime feed flow rate,improve the feed stability and prevent formation of gas pressure balance arch.