抄録
A systematic investigation on particle elutriation conducted in a vortexing fluidized bed cold model, 0.19m in diameter and 4.0m in height, is reported. Glassed beads were used as the fluidized material. The coarse particle diameter was 545µm. The fine particles used for elutriation were 81, 97, 113μm in diameter. The effects of various parameters on the elutriation are investigated fro the data obtained using the response surface methodology (RSM), which provides an efficient experimental strategy.According to the information obtained from previous studies, the dominant factors for elutriation rate are known as gas, particle and fluid dynamics characteristics within the fluidized bed. Therefore, the primary and secondary air flow rates, secondary air injecting nozzle diameter, imaginary secondary air and fine particles were chosen as the operating parameters.
The experimental results showed that the significant dominant factors order was: the primary-air flow rate, fine particle size, secondary-air flow rate, imaginary circle diameter, The primary air interactions with the fine particle size, secondary-air flow rate with the imaginary circle diameter, and secondary-air flow rate with the secondary-air inlet diameter exerted significant influences on the elutriation behavior.
