超声对含油浮渣脱水性能的影响

扬子石化炼油厂目前年产含油浮渣15000吨左右，由于含水率过大导致处置困难，利用价值不高。采用超声波辐照法对含油浮渣进行预处理，沉降一段时间后可降低其含水量，从而减少浮渣体积，达到简量化的目标。实验结果给出了达到最佳脱水效果时各影响因素如超声频率、声强、作用时间、沉降时间及沉降温度等的最适宜值。与原有采用添加絮凝剂过滤工艺相比较，具有一定的优越性：即在达到相同效果下，无需使用絮凝剂，从而降低含油浮渣的脱水成本；同时，在同样的沉降条件下，超声作用后的浮渣含水率更低。

Effect of ulrtasound on the dehydration of oily scum

About 15000t of oily scum with high water-containing can be produced per year by Yangtze Petrochemical Refinery. Experiments of using ultrasound pre-processing to reduce water-con-taining, as well as reduce the volume of the oily scumhave been made. Results give the optimum values of some factors influencing dehydration effect, such as frequency, intensity, lasting time of ultrasound, sedimentation time and temperature. Comparing with the original technology of adding flocculants into the scum, the ultrasound method is obviously superior in saving the depletion of flocculants to make the processing cost much lower for the same effect, and meantime in making the water-containing of the oily scum lower under the same condition of sedimentation.