Gas and liquid contact apparatus – Contact devices – Injector type
Patent
1998-06-17
2000-11-07
Bushey, C. Scott
Gas and liquid contact apparatus
Contact devices
Injector type
261115, 261116, B01F 304
Patent
active
061424560
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method and apparatus for dissolving and mixing a gas and a liquid wherein a reaction is caused between a gas and a liquid under a pressure or wherein pressurized water with a gas dissolved therein in an oversaturated state or the like is supplied.
BACKGROUND ART
Conventional apparatuses for dissolving and mixing a gas and a liquid include those having a suction device which is a fluid channel having a restriction portion to absorb a gas into a liquid in order to form a mixed flow of the gas and liquid, as disclosed in Japanese unexamined patent publication No. H6-285345 of the applicant. Such a suction device includes an expanded portion formed by a pipe line that is gradually expanded downstream of the restriction portion and includes a gas intake channel for introducing a gas provided thereon slightly downstream of the restriction portion. A liquid is delivered by a pressure to the suction device. The flow of the liquid delivered by a pressure forms a negative pressure at the restriction portion to suck the gas, thereby forming a mixed flow of the gas and liquid.
In the case of the apparatus for mixing a gas and a liquid disclosed in the above-mentioned patent publication, the pressure to deliver a liquid becomes high, because it operated by supplying a gas into the liquid by utilizing the energy of the liquid delivered by a pressure, i.e., a negative pressure produced by the rate of the flow. This has resulted in a problem in that the pump as a means for pressure delivery is expensive and there is a poor choice for the pump because it consumes high motive power and must provide a high pumping pressure.
The present invention has been conceived taking the above-described problem with the prior art, and it is an object of the invention to provide a method and an apparatus for dissolving and mixing a gas and a liquid which allow a gas and a liquid to react and to be dissolved efficiently with less energy.
DISCLOSURE OF THE INVENTION
The present invention is a method of dissolving and mixing a gas and a liquid comprising the steps of providing an injection portion for injecting a liquid at a flow rate in the range from approximately 5 m/s to approximately 15 m/s in a horizontal direction at an upper part of a mixing container filled with a gas, providing a restrictor, which is a restricted channel, for maintaining a pressurized state in the mixing container downstream of the mixing container, injecting a liquid into the mixing container from the injection portion to cause a reaction or dissolution between the gas in the mixing container and the injected liquid in the pressurized state and to cause a liquid including the gas dissolved therein to flow from a lower part of the mixing container, stopping the supply of the liquid into the mixing container when the gas in the mixing container is reduced as a result of the dissolution of the gas into the liquid therein, supplying the gas into the mixing container, and alternately performing the injection of the liquid and the supply of the gas into the mixing container.
Further, the present invention is a method of dissolving and mixing a gas and a liquid comprising the steps of providing an injection portion having a restriction portion which is a partial restriction of a fluid channel and having a suction device formed with a gas intake port for introducing a gas from the outside provided slightly downstream thereof, mounting the injection portion to an upper part of a mixing container filled with a gas, providing a restrictor, which is a restricted fluid channel, for maintaining a pressurized state in the mixing container downstream of the mixing container, injecting a liquid into the mixing container from the injection portion at a flow rate in the range from approximately 5 m/s to approximately 15 m/s to cause a reaction or dissolution between the gas in the mixing contained and the injected liquid and to cause a liquid including the gas dissolved therein to flow from a lower part of the mixing containe
REFERENCES:
patent: 904301 (1908-11-01), Black et al.
patent: 2271896 (1942-02-01), Lewis
patent: 3367402 (1968-02-01), Cross, Jr. et al.
patent: 4164541 (1979-08-01), Platz et al.
patent: 5514267 (1996-05-01), Machiya
Kashiwa Masakazu
Machiya Katsuyuki
Nakayama Masaaki
Bushey C. Scott
IDEC Izumi Corporation
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