低料位操作下气固挡板流化床的压力脉动特性分析研究 机械自动化专业VIP专享

中文摘要低料位操作下气固挡板流化床的压力脉动特性摘要：基于当前的这一套机玻璃流化床冷模实验装置，还是应该要将CRP-1 催化裂解催化剂颗粒直接幻化成为内部固体介质，并将常温空气作为一项流化介质，通过对气速的不断调节，初始装料高度（H ）为 450 mm 的操作条件下，内构件安装在静床高度上方的操作模式，分析床层内的压力脉动特性。结果表明：单构件床内平均压力随表观气速的增大将出现三个阶段：0.04≤Ug≤0.48 m/s，平均压力随表观气速的 增 大 缓 慢 增 大 ； 0.48≤Ug≤0.83 m/s， 平 均 压 力 随 之 快 速 增 大 ；0.83≤Ug≤1.14 m/s，平均压力随之几乎不变。伴随着轴向高度的不断增大，压力也会呈现出逐渐下降的情况。伴随着床层高度的逐步升高，压力脉动标准也会急剧下降。特别是在床层底端，床层升高之后，床层的中部压力脉动标准偏差随床层高度变化不大，0.6 m 的床层在不断增高的这一过程当中，压力脉动标准偏差比值也会呈现出先增大后减小的这一情况。当气速在 0.04 m/s≤Ug≤0.44 m/s 范围内时单构件流化床中的气固两相处于湍动流态化阶段。当 0.44 m/s≤Ug≤0.83 m/s 时，流化床内气固两相处于鼓泡-节涌过渡流态化，压力脉动功外文摘要TitlePressure pulsation characteristics of gas-solid baffle fluidized bed under low level operationAbstractBased on the present series of mechanical fluidized bed cold model experimental apparatus, it is still necessary to convert the crp-1 catalytic cracking catalyst directly into the internal solid medium and use ambient air as a fluidizing medium for passing the gas velocity. The internal components are installed in the operating mode above the bed height in order to analyze the pressure pulsation characteristics within the bed by continuously adjusting under the initial load height (H) 450 mm operating conditions. The results show that the mean pressure in the single component layer increases with increasing surface gas velocity in three steps: the average pressure increases slowly with increasing surface gas velocity; the mean pressure ...