中药配方颗粒汇集装置数值模拟与试验研究
Numerical Simulation and Experimental Research on the Collection Device for Traditional Chinese Medicine Formula Particles

为了解决中药配方颗粒配药方式存在配药耗时长，易出错等问题。针对颗粒汇集装置提出了技术方案，基于计算流体动力学和离散元(CFD-DEM)耦合方法，对颗粒汇集装置不同出口速度下颗粒流态进行仿真模拟并采取试验研究。仿真结果表明：当出口气体流速为8 m/s时，部分颗粒在气路管道发生堆积，无法进入旋风分离器进行气固分离；当出口速度为10 m/s时，颗粒经过气路管道全部进入旋风分离器中；当出口达一定速度对旋风分离器内的颗粒进行汇集时，旋风分离器锥体区域产生一些“停滞”颗粒做水平圆周旋转，当出口速度逐渐减小到3 m/s及以下时，颗粒在料仓中达到稳定状态。同时，对颗粒汇集装置进行了样机搭建和试验验证，试验与仿真模拟结果基本吻合。为多种颗粒类物料的传输和收集提供了设计参考，提升中药配方颗粒在汇集过程中的智能化。
In order to solve the problems of long dispensing time and easy errors in the dispensing method of traditional Chinese medicine formula granules, a technical solution has been proposed for the particle collection device. Based on the coupling method of computational fluid dynamics and discrete element method (CFD-DEM), simulation and experimental research have been conducted on the particle flow state at different outlet velocities of the particle collection device. The simulation results show that when the outlet gas flow rate is 8 m/s, some particles accumulate in the gas pipeline and cannot enter the cyclone separator for gas-solid separation; When the outlet speed is 10 m/s, all particles enter the cyclone separator through the gas pipeline; When the outlet reaches a certain speed to collect particles inside the cyclone separator, some “stagnant” particles are generated in the cone area of the cyclone separator for horizontal circular rotation. When the outlet speed gradually decreases to 3 m/s or below, the particles reach a stable state in the silo. At the same time, prototype construction and experimental verification were carried out on the particle collection device, and the experimental and simulation results were basically consistent. This provides design references for the transmission and collection of various particulate materials, and enhances the intelligence of traditional Chinese medicine formula particles in the collection process.