细颗粒分级复合型水力旋流器结构及工艺参数的优化研究  

Optimization of Structural and Process Parameters for Fine Particle Classifying Hydrocyclone

作　　者：应锐[1] 喻俊志[1,2] 王卫兵[1] 张亭[1] 冯静安[1,3] 杜晟[1] YING Rui YU Junzhi WANG Weibing ZHANG Ting FENG Jingan DU Sheng(College of Mechanical ＆ Electrical Engineering, Shihezi University, Shihezi 832003 State Key Laboratory of Management and Control for Complex Systems, Institute of Automation, Chinese Academy of Sciences, Beijing 100190 School of Mechanical Science ＆ Engineering, Huazhong University of Science ＆ Technology, Wuhan 430074)

机构地区：[1]石河子大学机械电气工程学院,石河子832003 [2]中国科学院自动化研究所复杂系统管理与控制国家重点实验室,北京100190 [3]华中科技大学机械科学与工程学院,武汉430074

出　　处：《机械工程学报》2017年第2期124-134,共11页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(51264034)

摘　　要：Ca(OH)_2提纯是实现电石渣制备石灰石的关键环节,通过复合型水力旋流器对电石渣细颗粒分级,其结构参数和工艺参数,以及颗粒的物性参数直接决定Ca(OH)_2的提纯效果。基于RSM模型和混合多相流模型,对复合型水力旋流器的流场进行数值模拟,分析旋转栅结构对流场的影响;同时在平衡轨道理论的基础上,建立复合型水力旋流器的分离粒径预测模型,根据电石渣颗粒的基本特性,对复合型水力旋流器进行结构优化;制作试验样机,采用二次正交旋转组合试验设计,参考分级粒径、分离效率、处理量、分离精度、分股比5项分离指标,验证复合型水力旋流器的分离效果,确定最佳工艺参数。试验结果显示,在进料速度2.1 m/s,旋转栅转速1 205 r/min,进料质量浓度22%的操作条件下,综合分离效果最佳,此时分级粒径为70μm,分离效率达81.3%,处理量为406.7 kg/h;与静态水力旋流器对比结果表明,复合型水力旋流器在压力损耗和离心力场强度方面具有明显优势,而在颗粒的滞留时间方面处于劣势。Purification of Ca（OH）2 is the key phase in limestone production from Carbide slag, in which the structure and operating parameters of compound hydrocyclone, as well as the physical parameters of the particles directly determine the purification effect during the compound hydrocyclone based Carbide slag classification. The internal flow field in the compound hydrocyclone is numerically simulated on the basis of RSM model and mixture multi-phase flow model, and a cut size prediction model is firstly established by using the equilibrium orbital theory. Then, the structural parameters of the compound hydrocyclone can be optimized, according to the influence of the revolving blades on the flow field and the distribution of the Carbide slag particles. After that, a prototype is built by using quadratic rotation-orthogonal combination design. According to five separate indicators involving cut size, separation efficiency, split ratio, separation precision and production volume, the separation performance and the optimal operating parameters can therefore be verified. Test results show that an optimal synthesized separation performance occurs when the inlet velocity is 2.1 m/s, the blades speed is 1205 r/min and the inlet concentration is 22%. Specifically, the optimal performance corresponds to a cut size of 70 μm, a separation efficiency of 81.3% and a production volume of 406.7 kg/h. Numerical simulation results indicate that the pressure loss and the centrifugal force strength of the compound hydrocyclone have striking advantages while the retention time of the particles is in a weak position.

关 键 词：水力旋流器 电石渣 正交试验 分离分级 

分 类 号：TD454[矿业工程—矿山机电]