Abstract: Currently,the ways to handle industrial waste salt is single. The treatment has not achieved good results. To solve these problems,a fluidized-bed was used to treat industrial waste salt. A self-made fluidized-bed was used to fluidize industrial waste salt. Gas-solid fluidized bed pressure fluctuation signal was detected. The relations between fluidization number and fluidized bed pressure fluctuations were studied. The effects of temperature on the critical fluidized velocity were described and correlations of critical fluidized velocity and temperature were proposed. Bubbles generated in the process of fluidization were studied,and morphology and size were discussed. A method to study material fluidization effect was introduced. Using improfile function,particles mixing from three-dimensional space was transformed into a function. The degree of back-mixing was described by strength and time. The industrial waste salt bed collapsing process was also described. In conclusion,fluidized-bed can handle industrial waste salt by comparing organics on the surface of waste salt via SEM.

Key words: fluidized-bed, bubble, voidage, industrial waste salt, fluidization

摘要： 目前工业废盐的处理方式较为单一，效果不理想。为了解决这一问题，提出了一种可用于处理工业废盐的流化床装置，采用自制的流化床对工业废盐进行流化，并对气固流化床的压力脉动信号进行实时监测，研究了流化数和床层压力波动的关系。介绍了温度对流化床临界流化速度的影响，并提出了临界流化速度与温度的关联式。对流化过程中产生的气泡进行了研究，讨论了气泡运动过程中的形貌和大小。介绍了一种可以考察床层物料流化效果的方法，并运用Improfile函数将三维空间内物料颗粒的混合情况转化为函数，通过强度和时间关系说明了返混程度的强弱。描述了工业废盐的床层塌落过程，最后通过扫描电镜对工业废盐表面上的有机物进行比较得出流化床处理工业废盐的可能性。

关键词: 流化床, 气泡, 孔隙率, 工业废盐, 流态化