【摘要】 该实验针对旋转锥体床,研究颗粒在锥体内的输运规律。探讨锥体旋转速率、颗粒给料速率、锥体溢流口数量等参数变化时,对颗粒在锥体内的动态存料量以及停留时间的影响。结果表明,旋转锥体床具有控制物料输送和调节停留时间的可操作性,增设竖立环壁将大大延长颗粒在锥体的停留时间,而搅拌器的设置对于保证颗粒在锥体内的充分混合起着关键作用。在设置竖立环壁和搅拌器的情况下,锥体内的动态存料量与给料速率成正比,而与锥体旋转速率反比;停留时间与锥体旋转速率和给料速率成反比。增加溢流口面积,将缩短颗粒停留时间和降低锥体内的存料量。研究结果对于设计新颖的煤热解气化炉以及开发以固体热载体热解气化为基础的多联产技术具有一定的参考价值。图10参8更多还原

【Abstract】 Laws that govern the transmission of particles through rotating cones were studied by probing into the influences of the cone’s rotating speed, feeding rate of particles and number of the cone’s overflow ports on the number of particles dynamically retained in the cone and their time of lingering. Test results show that rotating cones can control the transmission and lingering time of particles. Addition of a vertical annular wall greatly increases the particle’s lingering time, and good mixing effect can be obtained with a blender installed. When both a vertical annular wall and a blender are used, the retained amount of particles is in direct proportion to the feeding rate, but in inverse proportion to the rotating speed, while the lingering time is in inverse proportion to both the feeding rate and the rotating speed. In case the overflow ports are enlarged, both the lingering time and the retained amount are reduced. The test results may serve as a reference for designing pyrolytic coal gasification furnaces and for the development of co-generation technologies based on pyrolytic gasification with solid heat conveyors. Figs10 and refs 8.更多还原