Abstract: This paper presents the scum dewatering technologies and ultrasonic demulsification，and reviews the benefit of ultrasonic demulsification. A new way is introduced to recover the scum as for reuse. At a proper condition of ultrasound can reduce more than 20％ flocculant; ultrasonic dewatering technology can enhance scum treatment，reduce dewatering time，and the moisture content of scum after 5min ultrasonic treatment is the same as that after 72 hours settling; and the final dewatering rate can be increased by 6％～7％. Finally，a new way for scum reuse is proposed to use the dewatered scum in delayed coking.

摘要： 介绍了炼厂浮渣脱水技术的发展及超声破乳脱水领域的研究成果；综述了超声破乳脱水的优点有：在恰当的超声处理条件下能减少絮凝剂用量20％以上，浮渣超声脱水技术可加快浮渣处理速率，缩短脱水时间，超声处理5 min后浮渣含水率与沉降72 h后的效果相当，最终脱水率提高6％～7％，而且采用超声波破乳脱水技术进行浮渣破乳脱水，将脱水后浮渣应用于延迟焦化生产过程，可实现资源化利用，同时解决环保问题，获得较好的经济效益与社会效益。