Abstract:
Impinging stream was an alternative for drying high-moisture particulate materials. In the first part of the study, experimental study the particle mean residence time in an impinging stream system. The test material used in the study was resin with a diameter of approximately 0.4mm. The research examined the impact of various factors such as particle mass flow rates of 50, 60 and 70 kg/h; inlet air velocities of 20, 25 and 30 m/s and inlet pipes were inclined 0º, 5º and 10º on the particle mean residence time were investigated. The results found that an increase in the particle mass flow rates, inlet air velocity and angle of inlet pipes led to an increase in particle mean residence time. In the final part of the study, the behavior of air-particle motion in the impinging stream system was simulated using computation fluid dynamics. The results found that the model accurately predicted the experimental data. Moreover, an increase in the height of the chamber and particle size led to an increase in particle mean residence time. Under the specified operating
conditions of particle mass flow rates of 70 kg/h, inlet air velocity of 30 m/s, and an inlet pipe inclination angle of 10º, the maximum value of particle mean residence time was about 1.93s.