炼油厂污油超声破乳脱水及工业化应用

Ultrasonic Assisted Demulsification/Dehydration of Waste Oil in Refinery and Its Industrial Application

利用超声波破乳脱水的基本原理,在超声驻波场条件下考察了沉降温度、沉降时间、超声辐照时间、超声声强对污油破乳脱水的影响。结果表明,实验研究中,使用超声频率40 kHz的超声波发生器,沉降温度60℃、沉降时间120 min、超声辐照5 min、超声声强0.66 W/cm2时,污油的破乳脱水效果最好,含水率低于5%;工业化放大实验中,除沉降时间延长外,其余操作参数均具有实际指导作用,污油含水率降到10%以下,破乳脱水效果显著。

According to the basic principle of dehydration for the waste oil by ultrasonic treatment,the effects of the utrasonic parameters,such as settling temperature,sediment time,ultrasonic irradiation time and ultrasonic intensity,on the demulsification/dehydration of the waste oil were investigated.The results showed that the optimal effects were obtained when the waste oil was treated at the settling temperature of 60℃ for 120 min,and then was irradiated at the ultrasonic frequency of 40 kHz for 5 min at sound intensity of 0.66 W/cm^2.As a result,the water cut of the waste oil was lower than 5%.The parameters played a directive role in the industrial application except prolonging the settling time.The water content of the waste oil reduced to 10% and the dehydration effect was excellent.