中文摘要：

以某种低温煤焦油为原料,研究了低温煤焦油的乳化现象,综合采用加热静置、添加破乳剂、搅拌、超声以及离心处理等破乳方法对低温煤焦油进行脱水,分析比较了各种方法的脱水效果,获得了优化的脱水实验条件.其结果为：在80℃恒温静置30 min,破乳剂DH投加300×10-6,100 r/min搅拌5 min,0.4 W/cm2超声1 min,5 000 r/min离心10 min条件下,可得到51.3％的脱水率.

英文摘要：

The self-emulsification of low temperature coal tar was examined by considering asphaltene and colloid contents inside the tar.Experiments for dewatering low temperature coal tar was conducted by employing the following methods sequentially：heating,adding demulsifters,stirring,ultrasonic treating,and centrifuging.The dewatering efficiency of each method was carefully optimized and analyzed.The results indicate that the final dehydration rate of coal tar could reach 51.3％ at the optimal conditions：holding at 80 ℃ for 30 min,adding the demulsifier DH 300× 10-6,stirring at 100 r/min for 5 min,treating with ultrasound at 0.4 W/cm2 for 1 min and then centrifuging at 5 000 r/min for 10 min.