Youzhi Yi , Xinxin Che , Feng Wu , Zongliang Fan , Liping Yue
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引用次数: 0
Abstract
Through comparing the drying characteristics of the conventional spouted bed (CSB), the spouted bed with a swirling blade (ASB), and the spouted bed with a combination of a swirling blade and a swirling nozzle (ASNSB), the influence of swirling devices on the drying effect was investigated. In the experiments, various operating parameters were changed to comprehensively discuss the differences in drying rate among these spouted beds. Based on the experiments, the drying process of ASNSB was simulated by CFD. The gas-solid two-phase flow and mass transfer during the drying process were systematically analyzed. The experimental results demonstrate that, compared with CSB, the introduction of swirling devices in ASB and ASNSB effectively promotes the flow of particles and increases the drying rate, especially when the filler mass is low and the particle size is large. Furthermore, the drying promotion effect of the ASNSB is more pronounced at low temperatures and high gas flow rates. The simulation results show that in the drying process of ASNSB, mass transfer mainly occurs on both sides of the conical region, and the axial swirling blade changes the direction of gas flow and promotes the mixing of particles.
期刊介绍:
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.