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期刊论文
EXPERIMENTAL INVESTIGATION ON THE PERFORMANCE AND CHARACTERISTIC PARAMETER OF THE SQUARE SEPARATOR
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Separator is one of the key components of circulating fluidized bed (CFB) boiler, which directly influence the performance of the CFB boiler. Only when the separator supplied enough circulating solids, the bed can work under the material balance and energy balance condition. The square cyclone with curved inlet has shown the unique advantages such as compact size, no expansion joint, excellent reliability and lower operating cost. So it can fulfill well the scaling up of CFB boiler. A series of tests have been continued on the large-scale cold model test system for characteristic dimension 700mm square cyclone by changing the length of the vortex fonder, diameter of vortex finder and the length of vertical part of square cyclone. The pressure drop in the square separator and the fraction collection efficiency under different operation conditions were measured. The results of the experiment showed that the square cyclone with curved inlet has high collection efficiency and low pressure drop. The cut size d50 is around 20μm~30μm and the critical size d99 is around 80μm~160μm. The collection efficiency may be the function of the length of vertical part, diameter of the vortex finder, the length of the vortex finder and the speed of air at inlet.
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