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1. AU1981067878 - METHOD OF AND APPARATUS FOR COMBATTING WATER-BORNE POLLUTION

Office
Australia
Application Number 67878/81
Application Date 19.03.1981
Publication Number 1981067878
Publication Date 16.08.1984
Publication Kind A
IPC
B05B 1/34
BPERFORMING OPERATIONS; TRANSPORTING
05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
1Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
34designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
E02B 15/04
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
BHYDRAULIC ENGINEERING
15Cleaning or keeping clear the surface of open water; Apparatus therefor
04Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials
Applicants Delavan Ltd.
Inventors Percival, D.R., Sheldon, W.
Priority Data 8009486 20.03.1980 GB
Title
(EN) METHOD OF AND APPARATUS FOR COMBATTING WATER-BORNE POLLUTION
Abstract
(EN)
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.

Also published as
NO19813889