声共振连续混合停留时间分布  

Residence time distribution of continuous resonant acoustic mixing

作　　者：朱士富 刘红星 马宁[1] 李博豪 陈松 付小龙[1] 谢中元[1] ZHU Shifu;LIU Hongxing;MA Ning;LI Bohao;CHEN Song;FU Xiaolong;XIE Zhongyuan(Xi′an Modern Chemistry Research Institute,Xi′an 710065,Shaanxi Province,China;China Safety Technology Research Academy of Ordnance Industry,Beijing 100000,China)

机构地区：[1]西安近代化学研究所,陕西西安710065 [2]中国兵器工业火炸药工程与安全技术研究院,北京100000

出　　处：《化学工程》2025年第2期51-56,共6页Chemical Engineering(China)

摘　　要：为模拟连续声共振混合的流场和停留时间分布特性,以TMTD(2,2,4-三甲基-1,3-戊二醇)合成过程中使用的异丁醛和氢氧化钠溶液为对象,采用基于VOF-DPM(流体体积模型-离散相模型)的气液固三相流模型,VOF模型求解连续混合气液相界面,DPM模型追踪示踪粒子位置,通过连续相对颗粒的作用力实现VOF模型和DPM模型的单向耦合。通过提取示踪粒子的逃逸时间获取物料停留时间分布特性,并对连续混合通道3种关键结构参数:折流板数量、折流板倾角和开槽尺寸对停留时间分布的影响进行研究。结果表明:在60 g振动加速度下,停留时间分布曲线峰值位于11—16 s之间,95%以上的物料可在40 s内流出连续混合通道;3种结构参数对于停留时间分布的影响程度顺序为开槽尺寸>折流板数量>折流板倾角,折流板数量的增加在延长停留时间的同时还将提升停留时间分布曲线峰值,即停留时间分布更为集中,折流板倾角的变化对停留时间影响不明显,而开槽尺寸对停留时间影响最为显著,大开槽通道中物料停留时间显著缩短。To simulate the flow field and residence time distribution characteristics of continuous resonant acoustic mixing,isobutylaldehyde and sodium hydroxide solution used in the synthesis of TMTD were used against the object,the gas-liquid-solid three-phase flow model based on VOF-DPM(Volume of Fluid-Discrete Phase Model)was established,the VOF model was used to solve gas-liquid phase interface and the DPM model was used to track the position of the tracer particles,the unidirectional coupling of VOF model and DPM model was realized through the continuous relative particle force.The residence time distribution characteristics of materials were obtained by extracting the escape time of tracer particles,the effects of three key structural parameters of continuous mixed channel including the number,angle and slotting size of the baffle boards on residence time distribution were studied.The results show that the peak value of residence time distribution curve is between 11 s and 16 s,and the material above 95%can be discharged from the mixing channel within 40 s.The order of influence of structural parameters on residence time distribution is slotting size>number>angle,the increase in the number of baffle board can increase the peak value of residence time distribution curve while extending residence time,as well as the residence time distribution is more concentrated.The influence of angle of baffle board on residence time is not obvious,while the slotting size has the most significant effect on the residence time,and the residence time in a large open channel is be significantly shortened.

关 键 词：声共振连续混合 TMTD 多相流 停留时间 数值模拟 

分 类 号：TQ56[化学工程—炸药化工]