Liquid purification or separation – Structural installation – Geographic
Patent
1993-07-12
1996-05-07
Lithgow, Thomas M.
Liquid purification or separation
Structural installation
Geographic
2102422, 2102212, 210220, 210703, 261 361, 261120, 261DIG42, 261DIG75, B01F 304, C02F 124
Patent
active
055142672
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an apparatus for disperse-mixing gas bubbles with a liquid and dissolving a gas into a liquid efficiently.
BACKGROUND ART
Conventionally, a so-called ejector type bubble generator has been used as an apparatus for disperse-mixing a great amount of a gas with a liquid. With this bubble generator, a liquid jet sprayed out from a nozzle hole or nozzle holes is made to pass through a gas to be mixed with the liquid, and the gas around the liquid jet is drawn in it. Then, the gas mixture is jetted out into tile liquid From a throttle or throttles having substantially the same diameter as that of the nozzle hole or tile nozzle holes and provided coaxially therewith. In this way, a liquid is mixed with fine bubbles.
In some apparatuses, the fine bubble-dispersed jet produced by the above-mentioned processes is supplied to the lower portion of a tank in which the bubbles are dispersed as they are rising. A great amount of gas is dissolved in the liquid while the fine bubbles are rising in the liquid in the tank, thereby producing a Liquid into which a required gas is dissolved.
In some other apparatuses, a liquid and a gas are supplied to a pressure pump and are pressurized to dissolve the gas into the liquid. Thereafter, the pressure on tile gas-dissolved liquid is reduced so as to precipitate the gas dissolved in the liquid, thereby forming bubbles in the liquid.
When the conventional ejector type bubble generator is used, the liquid jet nozzle holes and throttles must be aligned with each other, leading to a complicated structure of the apparatus and requiring difficult assembling processes. The liquid-dissolving apparatus using a bubble tank requires a long starting time for obtaining a liquid into which a gas begins to be fully dissolved and provides poor manufacturing efficiency.
In the conventional apparatus using a pressure pump, a gas and a liquid are supplied together to the pressure pump. This is likely to produce cavitation in tile pressure pump. In order to prevent the cavitation, the material and the structure of the pressure pump are limited. Upon producing bubbles under the pressure dissolving process, only a gas dissolved in the liquid under pressure is precipitated, and thus it is impossible with the pressure reducing process to precipitate a larger amount of gas than that dissolved in the liquid. Accordingly, a very high pressure is required in order to produce a great amount of bubbles. This makes the apparatus bulky and cavitation is general very easily.
This invention has been made in order to overcome the problems which the prier art encounters and is intended to provide a method and an apparatus for dissolving a gas into and mixing the same with a liquid, which has a simple structure, forms fine bubbles in the liquid continuously and efficiently and mixes a great amount of gas with a liquid and dissolves the gas into the liquid efficiently.
SUMMARY OF THE INVENTION
The first aspect of this invention is to provide an apparatus For dissolving a gas into and mixing the same with a liquid, comprising a throttled section such as a Venturi tube, an orifice or the like provided in a fluid flow passage, a gradually widened section continuous with the throttled section, a gas inlet provided in the widened section slightly downstream of the throttled section, a mixing section provided downstream of the widened section, for mixing a liquid in a fluid flow passage with the gas flowing from the gas inlet into the mixing section, and a nozzle section provided on the outlet of the mixing section.
In the apparatus according to the first aspect of this invention, the gas is caused to flow into the liquid flow from a negative pressure section slightly downstream of the throttled section such as the throat section of the Venturi tube or the like. When gas flows in the mixing section, its flow speed is reduced and its static pressure increases. The gas is pressurized and dissolved in the liquid in the mixing section. The gas-liquid mixture is accelerated at the
REFERENCES:
patent: 3271304 (1966-09-01), Valdespino
patent: 3479281 (1969-11-01), Kikindai
patent: 3587976 (1971-06-01), Jacuzzi
patent: 3904393 (1975-09-01), Morse
patent: 4221336 (1980-09-01), Diamond
patent: 4659463 (1987-04-01), Chandler et al.
patent: 4911836 (1990-03-01), Haggerty
patent: 5080802 (1992-01-01), Cairo
patent: 5087377 (1992-02-01), Josefik
patent: 5232582 (1993-08-01), Takahashi
Hirasawa Kimio
Hori Tokio
Kashiwa Masakazu
Kinoshita Takayuki
Machiya Katsuyuki
IDEC Izumi Corporation
Lithgow Thomas M.
LandOfFree
Apparatus for dissolving a gas into and mixing the same with a l does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for dissolving a gas into and mixing the same with a l, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for dissolving a gas into and mixing the same with a l will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1224625