Motion characteristics and density separation of fine coal in an inflatable-inclined liquid-solid fluidized bed

作     者：Bo Lv Bobing Dong Xiaowei Deng Chaojun Fang Bo Lv;Bobing Dong;Xiaowei Deng;Chaojun Fang

作者机构：College of Chemistry and Chemical EngineeringHenan Polytechnic UniversityJiaozuo 454000China Henan Key Laboratory for Green and Efficient Mining&Comprehensive Utilization of Mineral ResourcesHenan Polytechnic UniversityJiaozuo 454000China Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency UtilizationHenan Polytechnic UniversityJiaozuo 454000China 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2021年第19卷第5期

页      面：299-307页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：the financial support by the National Natural Science Foundation of China(No.51774283,No.51904096,No.52004086) the research fund of Henan Key Laboratory for Green and Efficient Mining&Comprehensive Utilization of Mineral Resources(Henan Polytechnic University)(KCF202005) the research fund of Henan Key Laboratory of Coal Green Conversion(Henan Polytechnic University)(CGCF201906) 

主　　题：Inflatable-inclined liquid-solid fluidized bed Fine coal separation Fluidization Separation efficiency Secondary gas velocity Size fraction 

摘      要：To improve the adaptability of fluidized beds for fine coal separation,a new type of liquid-solid fluidized bed was constructed,i.e.,the inflatable-inclined liquid-solid fluidized bed(IILSFB).A combination of simulation analysis and separation experiments was used to analyze the fluidization characteristics and separation performance of the *** results showed that there was upflow and downflow in the fluidized *** upflow was mainly composed of water flow,followed by light and heavy particles;on the other hand,the downflow was caused by the backflow of heavy particles that settled at the inclined *** addition,the light particles that settled at the inclined section could return to the rising water flow under the action of secondary *** the water velocity,separation time,and secondary gas velocity increased,the comprehensive separation efficiency of fine coal in the fluidized bed improved,while the value decreased as the feed quantity *** also indicated the order of importance for these four factors,i.e.,water velocity,separation time,feed quantity,and secondary gas velocity,on ***,the comprehensive separation efficiency of 0.1-1 mm fine coal varied significantly with various factors,while that of∼0.1 mm and 1-3 mm fine coal was always at a low *** the latter case,the classification process of the size fraction was significantly better than the separation process in the fluidized *** optimal working conditions,an IILSFB was used to separate the fine coal(0.1-1 mm).The yield of clean coal was 37.95% with an ash content of 12.11%,and the possible error was 0.085 g/cm^(3),indicating that the IILSFB had good separation performance for 0.1-1 mm fine coal.