Gas and liquid contact apparatus – Contact devices – Rotating
Patent
1998-08-12
2000-09-12
Simmons, David A.
Gas and liquid contact apparatus
Contact devices
Rotating
2611211, 2611221, 261123, 261124, 210220, B01F 304
Patent
active
061165824
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a mixer for mixing two fluids, the mixer comprising a container provided with a cover, a bottom and side walls for receiving fluids; a power source with a transmission shaft; a hollow rotor mounted on the transmission shaft and partially submerged in a first fluid in the container, the rotor having a side surface and at least one end surface intersecting the transmission shaft substantially perpendicularly and having one end that comprises at least one opening for supply of a second fluid to the hollow rotor, at least part of the side surface of the rotor being pervious to the second fluid, through which side surface the second fluid can be discharged into the first fluid at least partially surrounding the rotor; means for supplying the second fluid to the rotor through the apertured end thereof, and a discharge tube for discharging the fluid from the container.
BACKGROUND
The concept of a fluid in this application generally refers to fluid mediums, for example gases, liquids and the like. The present invention specifically relates to a mixer with which preferably oxygen or an oxygen-carrying gas is injected, in the form of bubbles, into water in a container to enhance the removal of deleterious substances, such as radon, from the water.
Previously known are various methods and devices specifically for the removal of radon mainly from household water and from water used in institutions by aerating the water mass run into the device. However, this conventional art is related with considerable disadvantages. Hence, the known devices have poor efficiency, may have microbial growth that is deleterious to health, and may accumulate radioactivity which makes them hazardous waste. Also, these devices are space-consuming, inefficient and awkward to use and to service.
SUMMARY OF THE INVENTION
It is an object of the present invention to remove the drawbacks of the prior art and to provide a completely novel solution, enabling easy use of the device of the invention in households and at other locations without any health hazards, without the device taking up too much space or requiring technically highly skilled users. Furthermore, the solution in accordance with the invention aims at providing a device with which deleterious substances are quickly and efficiently removed from a first fluid run into the device.
This object is achieved in such a way that in accordance with the invention, the mixer has the characteristics defined in the appended claims. More specifically, the device of the invention is primarily characterized in that a liquid seal extending from the cover of the container beneath the surface of the first fluid is provided in the container, the liquid seal surrounding the rotor immediately adjacent thereto and being shaped to cover substantially the entire portion between the rotor cover and the first fluid as it extends beneath the surface of the first fluid, and that the end of the rotor facing the cover is open substantially for its entire area for supply of a second fluid to the rotor.
The invention is based on the idea that producing a large amount of gas bubbles, such as air bubbles, in the first fluid, such as water, enables efficient removal of deleterious gases from the first fluid, such as water.
When the upper portion of the rotor in the device is substantially isolated from the second fluid surrounding it, the second fluid flowing into the device and discharged through the rotor into the first fluid in the device are not mixed with the second fluid that is already present in the upper portion of the device and is surrounded by the liquid seal.
With the solution in accordance with the invention, no separate compressor or other equipment is needed to supply the second fluid to the first fluid. Furthermore, the rotor structure in accordance with the invention considerably diminishes the power requirement for the power source driving the rotor as it diminishes the wet surface of the rotor that is in contact with the first fluid sinc
REFERENCES:
patent: 2733056 (1956-01-01), Marky
patent: 2928665 (1960-03-01), Epprecht
patent: 3409130 (1968-11-01), Nakamura
patent: 4166086 (1979-08-01), Wright
patent: 4919849 (1990-04-01), Litz et al.
Abstract of FI 944613 dated Nov. 1994.
Karna Juhani
Vartiala Heikki
Hopkins Robert A.
Overcraft Oy
Simmons David A.
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