摘要
通过高压高频脉冲电脱水单因素和正交实验,对脱水过程中各因素对脱水性能的影响进行深入的研究。单因素实验结果表明,脱水电压增大,水滴间的聚结作用力随之增加,当超过临界值后,会发生电分散现象,脱水效率随之降低;当脉冲频率与水滴固有频率相近时,水滴的振动和变形程度最高,聚结效果较好。乳状液初始含水量较低或较高,均不利于脱水的进行,高压高频脉冲半绝缘电脱水可有效地避免占空比过大、含水量过高而导致的短路及垮电场等事故的发生。正交实验结果表明,高频脉冲电脱水的脱水电压、电场频率、占空比以及乳状液初始含水量均存在最优值,实际应用中应充分考虑脱水效果与脱水能耗间的关系,以达到高效低耗的脱水要求。
The factors acting on the performance of high voltage and impulse electrostatic dewatering process is investigated through one-factor and orthogonal experiments.The results of one-factor experiment indicate that,coalescent force between water droplets increases with a higher dewatering voltage,while the phenomenon of electro dispersion will arise when the voltage higher than critical value,which can decrease the dewatering efficiency.When impulse frequency is close to the natural frequency of water droplets,the coalescence effect is better because the oscillation and deformation of droplets is the largest one.Using high voltage,high impulse and semi-insulating electrostatic dewatering technology can avoid short circuit accident when the duty cycle and aqueous ingredients are exorbitant.The results of orthogonal experiment indicate that the values of dewatering voltage,electric field frequency,duty cycle and aqueous ingredients should be optimized.In order to meet the demand of higher efficiency of dewatering and lower expenditure of energy,it should take the relationship of dewatering effect and energy consumption into fully consideration.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2010年第6期917-922,共6页
Journal of Chemical Engineering of Chinese Universities
基金
中央高校基本科研业务费专项资金(09CX05011A)
关键词
高频脉冲
电脱水
乳状液
破乳
脱水性能
high frequency impulse
electrostatic dewatering
emulsion
demulsification
dewatering performance
