This invention relates to an apparatus and method for distilling fresh water from sea water or other non-fresh water samples.
In many parts of the world fresh, potable water is not readily available or plentiful. Ironically, many of these regions are surrounded by, or have access to, virtually limitless amounts of water that is not potable because of salinity (e.g., sea water), or other mineral contaminants (e.g., brackish water).
This problem has been recognized for a long period of time, and various approaches to generating potable and, more preferably, distilled water, abound in the field. See, e.g., U.S. Pat. No. 7,955,478 describing what is referred to as a “vertical, tubular evaporation apparatus.” The invention described in this patent shows that Fresnel lenses, which are a feature of one embodiment of the invention, can be used in the preparation of distilled water. The devices depicted in the '478 patent include inner an outer cylinders but do not disclose a vacuum element therebetween.
Many approaches to the field of preparing distilled water from sea water employ solar energy. See in this regard, U.S. Pat. Nos. 5,468,351 and 4,749,447, which also discuss the use of Fresnel lenses. Also teaching solar power based distilling apparatuses are U.S. Pat. Nos. 4,194,949; 4,160,523; 3,960,668; 3,232,846; 2,412,466; and 2,332,294, all of which are incorporated by reference.
Notwithstanding the interest shown, e.g., by the prior art, in apparatuses that are useful for separating impurities such as salt and other minerals from impure water, there is still a need for simple, effective devices which utilize as little energy as possible, and can also operate continuously.
It is an object of the invention to address all of these issues. How this is accomplished will be seen from the disclosure which follows.
The invention relates to a Y-shaped apparatus, each leg of which comprises two, concentric passage means, of different sizes. The larger of these is light permeable. They are positioned such that the smaller one is inside the larger one. In production, a vacuum is provided in the space in between these two passage means, referred to herein as pipe means as well.
The internal pipe means permits water to enter and exit through ports positioned at the two ends of the legs of the “Y.” In operation, when heat vaporizes water in one of the legs of the device, water moves up that leg, while no water diffuses up the unheated, second leg. The resulting vapor, which contains none, or a very reduced amount of contaminants, passes into an internal, collecting pipe means positioned within the Y-shaped device. The vapor cannot escape from the internal pipe means.
The entire Y-shaped device is positioned in water, in an inverted position such that the top, vertical position extends out of the water and the legs of the apparatus positioned thereunder.
In operation, at least one, and preferably as many as 3 lenses, are positioned such that they focus and concentrate sunlight at the point where the vertical portion of the apparatus, one leg thereof, and the water, meet. The focused sunlight heats the water in the leg of the apparatus, thereby vaporizing it. The resulting vapor enters the internal collecting pipe means, while the concentrated brine moves into the second leg of the apparatus, forced therein as a result of additional sea water entering the first leg, because of space afforded by the evaporation. The vapor moves in the collecting means and, upon passage to the area under the surrounding water, cools, and condenses, forming distilled water which passes into the reservoir.
More than one lens is employed so that, as the earth moves in the course of a day and its position changes relative to the sun, light is focused continuously on the apparatus and formation of vapor, followed by condensation, is continuous.
Referring now to the drawings,
A second pipe means “6” is positioned inside the first pipe means. This second pipe means is preferably constructed of non-corrosive material such as stainless steel. Element “6” has a diameter that is less than that of element “5,” such that a space “7” is formed therebetween. This space is treated such that a vacuum is created between the second and first pipe means. The vacuum prevents heat dissipation following action of the lenses, discussed infra.
A vertical pipe means “8” is positioned equidistant from the sides of the housing. This vertical pipe means is equipped with an entrance port “9” into which water vapor flows, as discussed infra. It extends through structure 1, and terminates in a reservoir “10” into which condensed water vapor flows. The reservoir optionally contains a means “11” for drawing distilled liquid therefrom.
In operation, structure 1 is positioned in shallow sea or brackish water so that the water surface depicted by “12” meets the apparatus where angled leg portions 3 and 4 diverge from vertical portion 2.
Both of leg portions 3 and 4 have openings “13” and “14” which permit passage of water in and out of the apparatus.
In operation, the lens “14” first focused the sunlight at point “18,” so that water flowing up leg 3 is vaporized immediately. The water vapor enters vertical pipe means 8, with any residual brine passing down through second leg 4. As the vapor moves down vertical pipe 8, it is cooled by the surrounding body of water and condensed, flowing into the reservoir means 9.
Ideally, three lenses are deployed, as is shown in
Any lens will function in the invention, however, Fresnel lenses, which are well known in the art, are preferred. Such lenses provide the artisan with the ability to heat the focal point to as high as 1850° F. At this temperature, 12 ounces of water boils in approximately 87 seconds.
Other features of the invention will be clear to the artisan and will not be repeated here.
The terms and expression which have been employed are used as terms of description and not limitation, and there is not intention in the use of such terms and expression of excluding any equivalents of the features shown and described or portions thereof, it being recognized that various modifications are possible within the scope of the invention.
This application claims priority of provisional application Ser. No. 61/536,782, filed Sep. 20, 2011 and incorporated herein, by reference, in its entirety.
Number | Name | Date | Kind |
---|---|---|---|
2317101 | Lecky | Apr 1943 | A |
2332294 | Bohmfalk | Oct 1943 | A |
2412466 | Miller, Jr. | Dec 1946 | A |
3232846 | Kimmerle | Feb 1966 | A |
3337418 | Halacy, Jr. | Aug 1967 | A |
3367843 | Clive et al. | Feb 1968 | A |
3397117 | Smith et al. | Aug 1968 | A |
3415719 | Telkes | Dec 1968 | A |
3960668 | Rush | Jun 1976 | A |
4160523 | Stevens | Jul 1979 | A |
4194949 | Stark | Mar 1980 | A |
4749447 | Lew | Jun 1988 | A |
4882012 | Wasserman | Nov 1989 | A |
5468351 | Hirota et al. | Nov 1995 | A |
5729987 | Miller | Mar 1998 | A |
7811420 | Sonander | Oct 2010 | B2 |
7955478 | McClure | Jun 2011 | B2 |
8668812 | Simpson et al. | Mar 2014 | B2 |
20120085635 | Haynes | Apr 2012 | A1 |
20140054159 | Bosch I Bosch | Feb 2014 | A1 |
Number | Date | Country | |
---|---|---|---|
20130068607 A1 | Mar 2013 | US |
Number | Date | Country | |
---|---|---|---|
61536782 | Sep 2011 | US |