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- W2349278611 abstract "In order to optimize the suspension preheater system and investigate the heating-exchange and mass-transfer process of bulk solids in gas phase,particle concentrations were measured at 6 levels along the axial direction of the heat-exchange pipe with the superficial gas velocity ranging from 12 to 21m/s and different solids loading.The results indicated that in the sect of the riser pipe where particles are accelerating,there is a remarkable relative velocity between particle and gas and turbulence strength of gas is strong and the phenomenon of the particle concentration fluctuation is obvious.In the sect where particles move with uniform velocity,the solids concentrations are distributed non-uniformly in radial direction,with lower particle concentrations occurred near riser center and higher near the pipe wall.In this sect the flow field is fully developed.Relatively flat curve of materials concentration distribution was observed in the central zone.From the center to the wall,the solids concentration increased monotonously and the distribution profile becomes steeper at the wall.From the pipe bottom to the top,the solids concentration in the wall vicinity significantly varies with vertical position,while around the riser center line the particle concentrations varied insignificantly.As the solids loading increase,the overall average particle concentration increases in the whole heat-exchange pipe,the dispersion distance of the powder as well as the radial fluctuation of particle concentrations increase.The feeding method of the raw meal has a remarkable effect on the particle concentrations.In the pipe the movement of powder is not only upwards but also in lateral migration." @default.
- W2349278611 created "2016-06-24" @default.
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- W2349278611 date "2008-01-01" @default.
- W2349278611 modified "2023-09-27" @default.
- W2349278611 title "Experimental investigation into radial distribution of powder in the heat-exchange pipe of a suspension preheater" @default.
- W2349278611 hasPublicationYear "2008" @default.
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