The Minimum Fluidization Characteristics of Mixture of Sludge Pellets and River Sand in a Fluidized Bed
污泥颗粒与河砂混合流化特性的实验研究

The experimental study was carried out in a fluidized bed of 105 mm in diameter and 800 mm in height to determine the minimum fluidization velocity and mixing characteristics.The results show that the minimum fluidization velocities and mixing are affected by the mass fraction of sludge pellets and river sand.The more the sludge pellets in the bed,the greater the minimum fluidization velocity,the mixing is the best when the mass fraction of sludge pellets in the mixture is close to 1:1,the more the moisture in the sludge pellets,the greater the minimum fluidization velocity of mixture.Based on the experimental data,a correlation of the minimum fluidization velocity of the mixture of sludge pellets and river sand is proposed.The research results can be reference for the design of bubbling fluidized bed sludge dryers.