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《Environmental Science & Technology》 2013-S1
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Experimental Study of Biomass Broken System

YUE Xia,LUO Si-yi,ZHOU Yang-min,LI Zong-gang,YI Chui-jie(School of Mechanical Engineering,Qingdao Technological University,Qingdao 266033,China)  
Biomass broken is a prerequisite for the utilization and conversion of biomass energy.The biomass raw material generally have long fibers and a small compressive strength.So we should use impact,shearing and grinding crushing way to achieve efficient crushing.This paper develops a set of biomass fine crushing system,on the influence of the main paramenters of crushing process: speed,the blade and the cutter space and material moisture are investigated.The results show that: the particle size of the crushed product is controlled at below 250 μm,crushing energy consumption between 70~120 kW.h/t,mainly depends on the moisture content of materials and operating parameters of the crusher.Improve the speed of the crusher,smaller powder(d106 μm) of the broken product increase and crushing unit energy consumption rise.Reduce the blade and the cutter space can increase the biomass crushing effect,but the unit energy consumption increase.Moisture content is higher,fine powder content of broken products is few,the unit energy consumption is greater.Comprehensive comparision,best crushing condition is: speed 3 600 r/min,the blade and the cutter space is 8mm,moisture content of 10.6%.At this time,the energy consumption is 98 kW.h/t.Product size distribution: powder below 106 μm accounted for 71.5%,powder between 106 μm and 250 μm accounted for 28.5%.
【Fund】: 国家自然科学基金项目(50934010)
【CateGory Index】: X705
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