工业中试装置中烟丝的滚筒传输特性

Transportation Characters of Cut Tobacco in Pilot Rotary Cylinder

在一工业中试装置中对烟丝的滚筒传输特性进行了研究,考察了冷态稳定传输过程中烟丝流量、筒内风速、滚筒转速以及烟丝含水率对烟丝滚筒滞留量、滞留时间和轴向传输速度的影响,分析了不同条件下烟丝在滚筒内升举—抛洒单元运动时间、运动次数及运动步长的变化规律。结果表明:①筒内风速、滚筒转速和烟丝含水率对烟丝滚筒滞留时间影响显著,随筒内风速、滚筒转速的增大,烟丝滚筒滞留时间减小、轴向传输速度增加,烟丝含水率增大则使得烟丝滚筒滞留时间增加、轴向传输速度减小;②随滚筒转速、烟丝流量、烟丝含水率增大,烟丝在滚筒传输过程中经历的升举—抛洒单元运动次数增加、运动步长减小,筒内风速对烟丝在滚筒内的升举—抛洒单元运动次数和运动步长的影响与之相反。

The transportation characters of cut tobacco in a pilot rotary cylinder without heating were studied, and the effects of cut tobacco flow rate, air velocity in the cylinder, rotating speed of the cylinder and moisture content in cut tobacco on the retention amount, average retention time and axial transportation velocity of cut tobacco in the Cylinder under stable transportation state were investigated. The moving cycle of cut tobacco from being lifted to dropping, the number of cycles, and axial displacement per cycle under different test conditions were analyzed The results showed that：l ） air velocity in cylinder, rotating speed of cylinder and moisture content in cut tobacco influenced the average retention time of cut tobacco in rotary cylinder significantly; with the increase of air x;elocity and rotating speed, the average retention time of cut tobacco decreased, the axial transportation velocity increased ;however the effects of moisture content in cut tobacco were on the contrary;2） with the increase of rotating speed of cylinder, cut tobacco flow rate and moisture content in cut tobacco, the number of moving cycles of cut tobacco increased,while the axial displacement per cycle decreased ; however the effects of air velocity in cylinder were on the contrary.