분체공학 , 유동층 , 고분자 , 재료 ( 무기 , 유기 ) : 기계적 교반유동층에서 미세입자의 최소유동화속도에 미치는 교반속도와 온도의 영향 = Powder Technology , Fluidized Bed , Polymers , Materials ( Inorganics , Organics ) : Effects of Agitation Speed and Temperature on Minimum Fluidization Velocity of Cohesive Particles in a Mechanically Agitated Fluidized Bed

다국어 초록 (Multilingual Abstract)

To interpret the effects of agitation speed and temperature on the minimum fluidization velocity, bed and distributor pressure drop and pressure fluctuation signal have been measured in a high temperature mechanically agitated fluidized bed(0.05m i.d. and 1.31m high) using bentonite(mean particle diameter: 3.7㎛, apparent density: 1,681㎏/㎥) as bed material. Fluidization of very fine cohesive powder is possible if mechanical energy is introduced into the bed by agitation. Measured minimum channeling velocity and minimum fluidization velocity increased with increasing bed temperature, however, increased after an initial decrease with increasing agitation speed. The empirical correlation, considering the temperature effect but no effects of agglomerate size and density, on the minimum fluidization velocity of cohesive particles has been proposed on the basis of the experimental data of present study.