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针对粒径1mm～10mm的砂土物料,设计了一套真空吸送装置。在真空吸送装置中,分离系统用于将物料颗粒从气固两相流中分离出来。介绍了砂土物料真空吸送分离系统的设计原则,运用计算流体动力学软件对气固两相流的运动状态进行了模拟,获得了分离系统内气流压力等值线图和流迹,计算了分离系统的压力损失。设计中,针对不同粒径的球体砂土颗粒,采用离散相模型与拉格朗日方法跟踪颗粒的运动轨迹,优化了分离系统结构、提高了砂土的分离效率。
For the sand material with particle size of 1mm ~ 10mm, a vacuum suction device was designed. In vacuum suction devices, the separation system is used to separate material particles from the gas-solid two-phase flow. The design principle of vacuum suction and separation system for sand material is introduced. The flow state of gas-solid two-phase flow is simulated by computational fluid dynamics software. The isobaric diagram and flow trace of gas-liquid pressure in the system are obtained. Separation of system pressure loss. In the design, according to the different size of spherical sand particles, the discrete phase model and Lagrange method are used to track the particle trajectory, the structure of the separation system is optimized, and the separation efficiency of sand is improved.