气流场中石蜡颗粒表面的剪切脱水

针对水冷塔石蜡造粒工艺中石蜡颗粒表面脱水，提出用气流剪切脱除颗粒表面残留水的方法，设计了气流剪切脱水的设备结构，并实验验证了该过程脱水的有效性。分析了颗粒表面的脱水过程，由于水滴在石蜡表面不润湿，在表面张力作用下，以球帽型液滴形式存在，在气流的剪切作用下，水滴从石蜡表面脱离。实验结果表明，在3.5m/s气速下，10s的停留时间就能实现石蜡颗粒表面完全脱水，脱水速率与颗粒表面相对气速有关，随操作气速增大，脱水速率加快。剪切脱水过程中的流化空气不需要加热，能耗低。

Water removal from wax particle surface by gas shear flow

A novel method for removing water droplets on a wax particle surface by gas shear flow has been developed for a spherical wax granulation process in a water-cooling tower.An apparatus for water removal from the wax particle surfaces was designed,and the feasibility and effectiveness of the process were verified by experiment.The water droplet removal process was analyzed.A water droplet on a wax surface forms a spherical cap due to interfacial forces,gravity and the hydrophobic surface of the wax.The droplet was blown off the surface by gas flow.The experiments showed that a water droplet on the wax particle surface was removed effectively in ten seconds at a gas velocity of 3.5m/s.The relative gas velocity determines the droplet removal rate and the droplet removal rate increases as the gas velocity increases.The process does not require heated air,leading to low energy consumption.