| 摘要 |
<p>Method and apparatus for combatting water-borne oil pollution, such as an oil slick, by spraying the polluted region with an oil-dispersant composition from one or more double swirl chamber nozzles (12). Such a nozzle has a primary swirl chamber into which the liquid to be sprayed is introduced tangentially to swirl therein. The primary swirl chamber terminates in a primary orifice constituting the entry to a secondary swirl chamber in which the swirling motion of the droplets produced in the primary chamber is slowed down and the droplets agglomerate. The droplets leaving the double swirl chamber nozzles are of larger droplet size and narrower droplet size distribution than the droplets leaving a conventional nozzle. The spray produced by the double swirl chamber nozzles is less susceptible to drift and more certain coverage of the polluted area can be achieved. The apparatus may be mounted on an air-borne vehicle or a water-borne vehicle such as a tug, and, in the latter case, may include a plurality of conventional nozzles (23) for spraying with water the polluted region already sprayed by the double swirl chamber nozzle(s) (12), thereby to agitate the region and mix the dispersant with the pollution. </p> |
