生物质粉末气力输送特性试验研究  

Experimental Study on Characteristics in Pneumatic Conveying of Biomass Powder

作　　者：王思佳[1] 靳世平[2] 黄芬霞[2] 曹代科 张星逸 李晟[1] WANG Sijia JIN Shiping HUANG Fenxia CAO Daike ZHANG Xingyi LI Sheng(China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan 430074, China College of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

机构地区：[1]华中科技大学中欧清洁与可再生能源学院,湖北武汉430074 [2]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《工业加热》2016年第6期45-48,共4页Industrial Heating

基　　金：国家科技支撑计划项目(2015BAD21B00)

摘　　要：在输送压力可达0.4 MPa,固气比最高可达190 kg/m3的自建试验台架上进行生物质粉末气力输送试验,研究输送系统的气体表观流速、罐压、背压以及流化风量以及载气风量对气力输送固气比的影响。结果表明,增大气体表观流速会导致固气比的降低;固气比会随着输送压差的增大而增大;随着流化风的增大,固气比呈现先增大后减小的趋势,适当增加载气风量有利于提高固气比,但当载气风量大幅度增加后,会导致固气比的降低,即生物质粉末气力输送过程中存在最佳载气风量。The experiments were carried out on a self-built experimental facility which was set at the pressure up to 0.4 MPa and the solidgas ratio up to 190 kg/m3. The effects of the superficial gas velocity,tank pressure,the back pressure,the fluidization air flow rate and the carrier gas flow rate on the solid-gas ratio were investigated. It was found that with the increase of the superficial gas velocity,the solid-gas ratio would decrease. With the total conveying differential pressure increasing,the solid-gas ratio increased. When the fluidization air flow rate increased,the solid-gas ratio increased at first and then decreased. Increasing the carrier gas flow rate properly was beneficial to increase the solid-gas ratio. But when the carrier gas flow rate increased drastically,the solid-gas ratio would decrease. It showed that in the process of pneumatic conveying,the carrier gas flow rate had the optimal value.

关 键 词：生物质粉末 气力输送 固气比 

分 类 号：TK6[动力工程及工程热物理—生物能]