高压电场中蔗糖溶液的蒸发特性

Evaporation Characteristics of Sucrose Solution under High Voltage Electric Field

[目的]为进一步研究高压电场中蔗糖溶液的蒸发特性和机理。[方法]在高压电场中,以不同浓度蔗糖溶液为研究对象,进行电压、电极间距、电场类型等参数对蒸发速度的试验研究,同时进行在针-板电极中间放绝缘板阻挡和不放绝缘板的对比试验研究。[结果]高压电场可以提高蔗糖溶液的蒸发速度;在低浓度下,蔗糖浓度对蔗糖溶液蒸发速度的影响极小;蒸发速度与电压极距有关,极距越小,蒸发速度越大;交流电压下蔗糖溶液的蒸发速度明显高于直流电压下;在无绝缘板阻挡的条件下蒸发速度明显高于阻挡条件下的。[结论]这为探索高压电场干燥特性和机理提供新的实验理论上的线索和依据。

[ Objective ] The research aimed to further study the evaporation characteristics and the mechanism of sucrose solution under high voltage electric field. [ Method] We used the sucrose solution as the research object under high voltage electric field. The evaporating experiment was investigated using different parameters such as voltage, electrode distance, type of electric field etc. At the same time, we carried out the comparative experiment of having or having no insulation board placed in the middle of the needle-plate electrodes. [ Result] The evaporation rate of sucrose solution was notably increased in the high voltage electric field system compared with control. At low concentration, the concentration of sucrose solution had smaller effect on the evaporation rate. The evaporation rate was associated with electrode distance. The evaporation rate of sucrose solution under AC electric field was significantly greater than that under DC electric field. The evaporation rate without insulation board was significantly greater than that with insulation board. [ Conclusion] This work presents a facile and effective strategy for experimentally and theoretically investigating the drying properties under high voltage electric field, and gives deeper insight into high voltage electric field drying technique.