Gallego-Juarez JA, Rodriguez-Corral G, Elvira-Segura L, Gonzalez-Gomez I
Instituto de Acustica, Dpto. Senales, Sistemas y Tecnologias Ultrasonicas, CSIC, Madrid, Spain.
Ultrasonics. 2000 Mar;38(1-8):642-6. doi: 10.1016/s0041-624x(99)00129-8.
The separation of fine particles from gases or liquids is a topic of permanent industrial attention. The use of ultrasonic energy to assist conventional separation techniques seems to be very promising. The adequate applications of high-intensity ultrasonic fields may contribute to improve the efficiency and capacity of the separation methods presently used. The specific mechanisms to ultrasonically enhance separation processes basically depend on the medium to be treated. In gas suspensions, where very fine particles have to be removed, ultrasonic action involves agglomeration of particles in order to increase their size and, consequently, to improve collection efficiency of conventional filters. In liquid suspensions, agglomeration is, in general, less efficient than in gases. Nevertheless, the ultrasonic energy is useful to dewater fine-particle high-concentration suspensions such as slurries and sludges. This paper deals with the application of acoustic energy to assist fluid/solid separation processes in gas and liquid suspensions and presents some theoretical and experimental results in specific applications.
从气体或液体中分离细颗粒是工业界长期关注的一个话题。利用超声能量辅助传统分离技术似乎很有前景。高强度超声场的适当应用可能有助于提高目前使用的分离方法的效率和容量。超声增强分离过程的具体机制主要取决于待处理的介质。在必须去除极细颗粒的气体悬浮液中，超声作用涉及颗粒团聚，以增加其尺寸，从而提高传统过滤器的收集效率。在液体悬浮液中，团聚通常不如在气体中有效。然而，超声能量对于脱水细颗粒高浓度悬浮液（如矿浆和污泥）很有用。本文探讨了声能在气体和液体悬浮液中辅助流体/固体分离过程的应用，并给出了一些特定应用中的理论和实验结果。
