摘要
针对煤泥水不分级处理存在的重复分选、浮选效率低等问题,提出一种新型煤泥水分级池。利用水力分级原理和黏性流体阻力规律,设计了新型煤泥水分级池以及正四边形和正六边形2种形状整流管束,利用Fluent软件对两种形状时池体内流场分别进行了数值计算,并对比分析了两者流场分布特征,以及流速、雷诺数、沿程损失等流体力学参数。研究表明,正四边形和正六边形管束均有控制流态的作用,采用正六边形管束时,管束之间速度差略大,但平均沿程损失略小,而采用正四边形管束时,各管束之间速度差较小,但平均沿程损失更大,流场分布更均匀,更有利于颗粒的准确分级。因此,煤泥水分级池将煤泥水连续分为多个粒级是可行的,可进一步进行实践试验研究。
According to repeated coal cleaning and low flotation efficiency due to no-classified slurry separation,a novel slurry classification pond was proposed. Based on the hydraulic separation principle and the viscous fluid resistance principle,the slurry classification pond,square shape and regular hexagon shape pipes were designed. The flow field of the slurry classification pond with different shape pipes was numerically simulated,and distribution characteristics the velocity,reynolds number,route energy loss and other hydrodynamic parameters were analyzed. The results show that both square and regular hexagon shape pipes can control the flow state well. When the regular hexagon shape pipes are used,the velocity difference is great,but the mean route energy loss is small. When the square shape pipes are used,the velocity gradient is smaller,the mean route energy loss is larger,and the flow field is smoother. So the square shape pipes are better for the accurate classification of particles. Based on the analysis,the continuous classification of slurry by the slurry classification pond developed is feasible,and it suggests that an actual test should be conducted.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2015年第8期1924-1928,共5页
Journal of China Coal Society
基金
国家自然科学基金资助项目(51174006)
安徽省自然科学基金资助项目(1308085ME73)
关键词
煤泥水
分级
流场
粒级
slurry
classify
flow field
grade
