DEM study on the mixed feeding process of coal and cylindroid biomass particles in a screw feeder |
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| Authors: | Guoqing Lian Wenqi Zhong Xuejiao Liu |
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| Affiliation: | Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China |
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| Abstract: | The complex mixed feeding process for the binary mixture of coal and cylindroid biomass particles in a screw feeder was numerically studied by the discrete element method (DEM). The effects of biomass feeding ratio, feeding rate, and screw rotational speed on the feeding performance were investigated with the continuity, uniformity, and stability of the mixed feeding process being emphatically discussed. The results reveal that the stability of real-time mass flow rate and biomass blending ratio performs better at higher biomass feeding ratios. A larger variability of real-time biomass blending ratio is found at low feeding rate, while increasing the feeding rate reduces the stability of real-time mass flow rate and the too high feeding rate would cause some cylindroid biomass particles being hindered by the front wall surface of the hopper. Moreover, increasing the screw rotational speed significantly increases the stability of the mixed feeding process. |
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| Keywords: | Screw feeder Mixed feeding Non-spherical particle DEM DEM" },{" #name" :" keyword" ," $" :{" id" :" k0030" }," $$" :[{" #name" :" text" ," _" :" Discrete element method MSM" },{" #name" :" keyword" ," $" :{" id" :" k0040" }," $$" :[{" #name" :" text" ," _" :" Multi-sphere model B63C63" },{" #name" :" keyword" ," $" :{" id" :" k0050" }," $$" :[{" #name" :" text" ," _" :" Feeding rate: 63 biomass particles and 63 coal particles per second B206" },{" #name" :" keyword" ," $" :{" id" :" k0060" }," $$" :[{" #name" :" text" ," _" :" Feeding rate: 206 biomass particles per second C206" },{" #name" :" keyword" ," $" :{" id" :" k0070" }," $$" :[{" #name" :" text" ," _" :" Feeding rate: 206 coal particles per second CV" },{" #name" :" keyword" ," $" :{" id" :" k0080" }," $$" :[{" #name" :" text" ," _" :" Coefficient of variation CV of real-time mass flow rate at the feeder outlet CV of real-time biomass blending ratio at the feeder outlet |
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