Abstract
The fluidized state of grains varied with the various factors. Many studies were performed to express the uniformity of fluidized bed.
In this report, the fluidization index (I) was defined as follow.
I=(mean deviation of pressure drop, mmAq) / (frequency of pressure fluctuation, cps)
From experience, fluidization index has been associated with quality of fluidization, and for perfect fluidization the value of the index is equal to zero and increases as performance deteriorates.
For agricultural products, such as rape seed, un-hulled rice and soy bean, the pattern of index was indicated in Fig. 6. In this figure, L0 is height of fixed bed, L is height of fluidized bed and D is diameter of fluidized vessel
Obviously, the fluidization obtained by the felt distributor was better than by the wire screen distributor and the fluidization performance was influenced not only by the height of the bed but also by the vessel diameter.
