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Based on the experimental investigation of one-stage semi-circular impinging stream drying, the experiments with the two- stage semi-circular, as well as the vertical and semi-circular combined impinging stream drying were conducted. The variations of system pressure drop, the mean residence time of particles with the mass flow-rate ratio and air velocity ate. were determined. The influences of inlet air temperature, mass now-rate ratio, initial moisture content of particles and air velocity ate. on drying characteristics were also studied. The results indicate that the vertical and semi-circular combined impinging stream drying can make full use of the advantages of both the vertical and semi-circular impinging stream drying. Reasonable mass flow-rate ratio, air velocity, and higher inlet air tem- perature should be used for less energy consumption and cost during drying process.
Based on the experimental investigation of one-stage semi-circular impinging stream drying, the experiments with the two-stage semi-circular, as well as the vertical and semi-circular combined impinging stream drying conducted. The variations of system pressure drop, the mean residence time of particles with the mass flow-rate ratio and air velocity ate. were determined. The influences of inlet air temperature, mass now-rate ratio, initial moisture content of particles and air velocity ate. . The results indicate that the vertical and semi-circular combined impinging stream drying can make full use of the advantages of both vertical and semi-circular impinging stream drying. Reasonable mass flow-rate ratio, air velocity, and higher inlet air tem- perature should be used for less energy consumption and cost during drying process.