在高压气力输送试验台上,用氮气进行煤粉高压浓相气力输送试验研究.考察操作参数和粉体物性对煤粉质量流量和固气比等气力输送特征参数的影响,用信息熵分析试验过程中采集到的差压波动时间序列,建立信息熵和流动特性之间的关联.结果表明流动相图与SHANNON熵之间呈现较好的规律性.随着煤粉含水率的增大,煤粉的质量流量和压损减小,SHANNON熵值下降.随着输送压损的增大,SHANNON熵增大.
Experiments of dense-phase pneumatic conveying of pulverized coal with nitrogen are carried out in an experimental test facility.The influences of the moisture content,the superficial velocity and the pressure on mass flow rate and solid-gas ratio are investigated.SHANNON entropy analysis of pressure drop fluctuation time series is developed to reveal the flow characteristics.Based on the distribution of the SHANNON entropy in the difierent conditions,the flow stability and the evolutional tendency of SHANNON entropy in different regimes and the regime transition processes are obtained.The results indicate that phase diagram and SHANNON entropy reveal preferable regularity with superficial velocity.As the moisture COntent increases,the mass flow rate,the pressure drop and SHANNON entropy decrease.SHANNON entropy rises with increase in pressure drop.
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