Gas and liquid contact apparatus – Contact devices – Injector type
Patent
1997-12-15
2000-03-14
Bushey, C. Scott
Gas and liquid contact apparatus
Contact devices
Injector type
261 782, B01F 304
Patent
active
060361786
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a device for mixing air and water in a water purifier, said device comprising a water inlet pipe, which is connected to a water source and which extends into a water purifier tank, and an air inlet pipe extending coaxially inside the water pipe, one end of the air pipe being positioned outside the tank and the other end being positioned inside the water pipe to form an annular gap between the end of the air pipe and the inner wall of the water pipe, and the water pipe having a mixing portion which extends from the annular gap to the water pipe mouth in the tank.
2. Description of the Related Art
Aerating drinking-water is a prior-art method of reducing the amount of impurities in the water. Such water purifiers are disclosed in e.g. Swedish Patent 8900169-7 and Swedish Patent Applications 9303412-2, 9402780-2 and 9403643-1. In all the constructions shown in these publications, use is made of the ejector principle for admixing air to drinking-water which is pumped into a tank from a drinking-water source. The amount of air, actually the oxygen in the air, which is blended with the water affects the purifying process. The more oxygen blended with the water, the better the purification.
A technique of increasing the oxygen content in the water is to let the water-air mixture from the ejector flow out in the tank below the water surface in the tank. This is disclosed in SE-9403643-1. A stirring effect is accomplished in the tank, which is advantageous for the blending of oxygen with the water. In tests, it has been found that also an increased intake of air through the air inlet pipe is achieved by the flowing-out taking place below the water surface.
In spite of the increased air intake and the use of said stirring effect, the purification of the water will deteriorate owing to the fact that air and water mix worse as the flow rate increases.
OBJECTS AND SUMMARY OF THE INVENTION
The object of the invention is to solve this problem and provide a mixing device which supplies more air than prior-art constructions, while ensuring a satisfactory mixing of air and water.
A device for mixing water and air according to the invention includes a water inlet pipe, one end of which is connected to a water source and the other end of which extends into a water purifier tank, the water inlet pipe defining a mixing portion for mixing air and water. The device also includes an air inlet pipe extending coaxially inside the water pipe to the mixing portion, such that one end of the air pipe is positioned inside the water pipe to form an annular gap between the one end of the air pipe and an inner wall of the water pipe. The device further comprises at least one ring, and preferably three rings, arranged in the mixing portion on the inside of the water pipe, such that, when water is conveyed through the water inlet pipe, the ring (or rings) is hit by the annular water jet formed as the water passes through the annular gap, thereby forcing the water to mix with the air.
The invention will now be described in more detail by means of an embodiment with reference to the accompanying drawing, which schematically shows the inventive device arranged in a water purifier tank.
BRIEF DESCRIPTION OF THE DRAWING
The FIGURE is a cross-sectional view of one embodiment of the invention.
DETAILED DESCRIPTION OF THE INVENTION
The FIGURE shows a mixing device 1 according to the invention mounted in a water purifier tank 2. It should be pointed out that all the components in the water purifier that are not necessary for the understanding of the invention have been excluded from the FIGURE. Such components can be, for instance, pumps, level indicators, gas exhausters. The mixing device has a water inlet pipe 3 extending through the top of the tank. The water pipe end 4 positioned outside the tank is connected to a conduit from a well pump. The water pipe end 5 arranged in the tank is positioned on a level in the lower part of the tank, said level alway
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Sheet Listing English translation of Claim 1 of HU 171 926 and English translation of Title and Abstract of HU 203 682.
Bushey C. Scott
Libradon AB
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