摘要
为考察组合式分离器动静叶片对均匀性指数的影响,基于ZGM16型半工业中速磨煤机建立整机模拟模型,用Richardson外推法对网格无关性进行评估,并运用Fluent软件包中的RNG k-ε模型和DPM模型,采用均匀实验法对磨机中颗粒运动行为进行了模拟,分析了静叶片角度、动转子转速及其交互作用对均匀性指数的影响。结果表明:在1 600万网格密度下,模拟结果较为准确;动转子转速和静叶片角度对均匀性指数的影响可用二元二次非线性模型进行拟合,拟合精度较高,相关性显著;动静叶片的交互作用对均匀性指数影响显著。关键字:
In order to explore the effect on uniformity index of pulverized coal produced by the rotor and stator blades of the modular dynamic classifier, an overall analog modeling is made of the ZGM16 pilotscale mill, and the evaluation of mesh independence is made using Richardson extrapolation method. The behavior of motion of particles in the mill is simulated using the RNG κ-ε and DPM models in Fluent software and through uniform test. Finally, the 3D response surfaces between uniformity index and deflector baffle and rotor are plotted. As indicated by result of simulation , at a mesh density of 16 million, a relatively more accurate simulation result can be expected;the influence of rotor speed and baffle angle on uniformity index of pulverized coal can be fitted using binary quadratic linear model with a far higher fitting accuracy and significantly improved dependency;and the interaction between rotor and stator blades can exert a significant impact on uniformity index.
作者
张峰彬
谢卫宁
黄勇
何亚群
王海峰
魏华
王帅
ZHANG Fengbin;XIE Weining;HUANG Yong;HE Yaqun;WANG Haifeng;WEI Hua;WANG Shuai(School of Chemical Engineering and Technology ,China University of Mining & Technology,Xuzhou 221116 ,China;Advanced Analysis & Computation Center,Xuzhou 221116 ,China;Beijing Power Equipment Group,Beijing 102488 ,China)
出处
《选煤技术》
CAS
2019年第1期24-31,共8页
Coal Preparation Technology
基金
国家自然科学基金面上项目(51274196
51574234)
国家自然科学基金青年项目(51404267)
关键词
组合式分离器
煤粉均匀性指数
数值模拟
静叶片角度
动转子转速
modular-type classifier
pulverized coal uniformity index
numberical simulation
angle of stator blade
rotor speed
