纳米TiO_2颗粒在声场流化床中的流化特性  

Fluidization State of Nano-Particle TiO_2 in A Sound-Field Fluidized Bed

作　　者：段蜀波[1] 梁华琼[1] 王亮[1] 周勇[1] 朱家骅[1] 

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《化学反应工程与工艺》2005年第1期6-11,共6页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金项目(20176031)

摘　　要：以原生纳米级TiO2颗粒为物料,在内径为130mm的声场流化床中,考察声压、频率对纳米颗粒的流化特性的影响。结果表明,适当的低频强声波的引入能很好的抑制沟流,消除节涌,大大降低了流化床中纳米颗粒聚团的尺寸,使之在低气速下实现稳定流化,从而显著改善纳米颗粒的流化质量。The fluidization characteristics of TiO2, original nano-particle, were investigated in a transparent column with the diameter 130mm under the different sound pressure levels and frequencies. The fluidization quality of the particle was indicated by the curves of pressure drop and the bed expansion curves obtained from the experiments. The results suggested that the sound field could restrain channels, decrease effectively the size of the ultra fine particles agglomeration in the fluidized bed, make it steady fluidization and improve obviously the fluidization quality of the ultra fine particles.

关 键 词：TiO2颗粒 流化特性 流化床 声场 纳米颗粒 纳米级 强声波 物料 内径 沟流 聚团 气速 

分 类 号：TQ026.7[化学工程] X791[环境科学与工程—环境工程]