为研究脉动流化床的流化效果,对不同脉动气流参数条件下脉动流化床和传统流化床的流化特性进行了对比试验,并分别对流化曲线、流化床床层压降以及床层中心点密度波动进行了分析。结果表明,脉动流化床在临界流化状态时,床层压降变化平稳,流化曲线不会出现凸峰。脉动流化床中床层压降波动显著小于传统流化床,其床层密度的稳定性更高,相同流化数(流化床工作气流速度与起始流化速度的比值)时,脉动流化床具有更低的床层密度。

In order to study the fluidized effect of the pulsed fluidized bed, a comparison experiment was conducted on the fluidized characteristics of the pulsed flu idized bed and the conventional fluidized bed under the conditions of the different pulsed air parameters and the analysis was conducted on the fluidized curves, the be d layer pressure drop of the fluidized bed and the density fluctuations at the center of the fluidized bed individually.The results showed that when the pulsed fluidized be d was in critical fluidization status, the pressure drop variation of the fluidized bed was stable and the fluidized curve could not appear a raised peak.The middle bed lay er pressure drop fluctuations of the pulsed fluidized bed was obviously lower than the conventional fluidized bed and the stability of the bed density would be high.At th e same fluidized number, the pulsed fluidized bed would have much lower bed density.

国家自然科学基金创新研究群体资助项目(50921002)；煤炭加工与高效洁净利用教育部重点实验室开放基金资助项目(CPEU-KF08-08)；