Liquid purification or separation – With movable support – Float
Patent
1981-07-31
1983-02-08
Therkorn, Ernest G.
Liquid purification or separation
With movable support
Float
210923, 210538, B01D 1702
Patent
active
043728545
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a method for removing floating liquid impurities, particularly oil, from a flowing (or forced flowing) water surface by creating locally a water surface range of lowered level, by letting in surface layer of water contaminated (by oil) in the range of water of lowered level through spillway, by separating the mixture of liquid impurities and water, and by removing the separated, collected impurities. Furthermore, the invention relates to a device for removing liquid impurities, particularly oil, floating on the water surface, from flowing or forced-flowing water surface, executed as structural units submerged in water, provided with wall elements as well as overflow spillway encircling a range of lowered water level.
BACKGROUND ART
Due to the ever increasing industrialization impurities dangerous to the purity and living substance of natural water sources occur more and more frequently and great efforts are made all over the world to prevent and eliminate them. Among the impurities, petroleum products are reckoned with as the most dangerous ones. Different methods and equipment have been developed in order to remove them. They can practically be divided in two groups, considering the operational principles.
One of the groups contains (oil) scrapers operating on the basis of the so called adhesion principle in such a way that while oil adheres to certain structural matters submerged in impure water--which are afterwards taken out--water does not adhere to them. Thus the oil can be recovered by scraping, wiping, and extraction from means having a generally large surface (rotary discs, elevators, bundles of fibres, tussels) made of such structural materials (steel, plastics, etc.).
The other group involves oil and impurity scraping methods of separating the impured surface layer of water. Their common feature is that the space inside the spillway or overflow ring of a tank floating on water is sucked by a pump suitable for sucking the mixture of impurities and water created by a difference in level between two parts of the spillway. The surface layer of water and the impurities, such as oil, floating together with same on the surface runs slowly, i.e. overflows through the spillway i.e. overflow ring. The pump sucks the mixture of oil and water flowing in and continuously maintains the difference in level. The mixture sucked is separated so that oil would e.g. gravitationally be separated. There is also equipment known having a scraping unit serving at the same time as separator. A common disadvantage of all known equipment is that they can be used with full efficiency for still water only, as a fundamental condition of their efficient operation is that there can be only at least a slight speed difference between the equipment and the impure water. Therefore, such equipment is operated in such a way that the impurities in the vicinity of the scraper are locally stopped by damming, air blast etc. Scraping, however, is in such case of very low efficiency, considerable losses occur, i.e. depending on the water rate under the effect of the sucking swirls produced, one part of the impurities floating on the surface (such as oil) leaves the scraper, bypassing the equipment and the damming elements mostly from below.
DISCLOSURE OF INVENTION
The subject of the invention is to separate the impure surface layer of water, to separate the mixture of impurities and water, and to develop a method and device--realizing the principle of discharging impurities--suitable for the removal, at a high rate of scraping efficiency, of the liquid impurities, particularly e.g. petroleum products, floating on the surface in flowing or forced flowing water.
According to the present invention the separation of the impure surface water layer, separation in the same step and collection of the separate impurities, can be realized in the cleaning cross-section by producing and maintaining expedient speed of flow influenced both in its direction and rate. Accordingly, this aim can be achieved by
REFERENCES:
patent: 3662892 (1972-05-01), Sorensen
patent: 3666099 (1972-05-01), Galicia
patent: 3708070 (1973-01-01), Bell
patent: 3715034 (1973-02-01), Invanoff
patent: 3812968 (1974-05-01), Aramaki
patent: 3847815 (1974-11-01), Chastan-Bagnis
patent: 3850807 (1974-11-01), Jones
patent: 3951810 (1976-04-01), Crisafulli
patent: 3966615 (1976-06-01), Petchul
patent: 4061569 (1977-12-01), Bennett
patent: 4111811 (1978-09-01), Fukuda
Novex Foreign Trade Co. Ltd. for Development and Commercializati
Therkorn Ernest G.
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