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构造板式微通道用于互不相溶的液-液两相分散体系的连续快速分离。通过改变上板的材料可以构造GS-PTFE、SS-PTFE和PTFE-PTFE 3种类型的板式微通道。萃取后产生的油水分散体系在微通道中通过与通道上下壁面的相互作用实现油水两相的快速分离,分离后的油相从微通道的油相出口流出,水相从水相出口流出。微通道的分离效率与微通道的高度、液-液分散体系在通道中的体积流率、微通道与液-液分散体系的接触时间以及微通道的类型有关。高度为100μm的GSPTFE型微通道在体积流率低于4.8 m L/min的条件下可以实现油水两相的完全分离,其分离效率为100%。相比于传统的重力沉降分离方式,板式微通道极大地节约了液-液两相分离的时间,提高了工作效率。
Plate-type microchannels are constructed for the continuous rapid separation of liquid-liquid two-phase dispersions that are incompatible with each other. By changing the material of the upper plate, three types of plate microchannels, GS-PTFE, SS-PTFE and PTFE-PTFE, can be constructed. The oil-water dispersion generated after the extraction can rapidly separate the oil-water phase through the interaction with the upper and lower walls of the channel in the microchannel. The separated oil phase flows out from the oil phase outlet of the microchannel and the water phase flows out of the water phase outlet. The efficiency of microchannel separation depends on the microchannel height, the volumetric flow rate of the liquid-liquid dispersion in the channel, the contact time of the microchannel with the liquid-liquid dispersion, and the type of microchannel. GSPTFE microchannels with a height of 100μm can achieve complete separation of oil-water two phases at a volumetric flow rate of less than 4.8 m L / min with a separation efficiency of 100%. Compared with the traditional gravity sedimentation separation method, the plate-type microchannels greatly save liquid-liquid two-phase separation time and improve work efficiency.