短程蒸馏条件对废润滑油再生馏分色度的影响

Effects of operating parameters on chroma of cuts from waste oil in molecular distillation

通过调节刮膜式分子蒸馏操作参数,考察了不同类型废油再生产品透光率的变化。实验结果表明,温度升高,一级再生油的透光率下降,二级再生油的透光率上升,废内燃机油的操作温度应控制在225℃左右,废液压油的操作温度应控制在210℃左右,废混合油的操作温度应控制在215℃左右为最佳;真空度升高,一级再生油的透光率上升,二级再生油的透光率下降,废内燃机油的真空度应控制在12Pa左右,废液压油的真空度应控制在18Pa左右,废混合油的真空度应控制在16Pa左右为最佳;进料流量增加,一级、二级再生油的透光率均缓慢下降,因此应尽量维持较低流量。

Light transmittance of base oil from different waste oil was investigated using molecular distillation with adjusted parameters. Experimental results showed that transmittance of first stage base oil decreased and transmittance of second stage base oil increased with increasing temperature. Optimal temperature for waste machine oil was 225℃,210℃ for waste hydraulic fluid,and 215℃ for waste mixed oil. Transmittance of first stage base oil increased and transmittance of second stage base oil decreased with increasing vacuum. Optimal pressure for waste machine oil was 12Pa,18Pa for waste hydraulic fluid and 16Pa for waste mixed oil. When flow increased,transmittance of first stage and second stage base oil decreased accordingly.