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Vapor absorption system

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Vapor absorption system


Provided herein is a vapor absorption system, adapted to receive a vapor comprising a vacuum pump having an operating liquid, where the vapor is received by an operating liquid and condensed therein to provide condensed liquid mixed with the operating liquid.

Browse recent Caitin, Inc. patents - Fremont, CA, US
Inventors: Thomas P. Gielda, Jayden D. Harman
USPTO Applicaton #: #20120285661 - Class: 16510413 (USPTO) - 11/15/12 - Class 165 
Heat Exchange > Intermediate Fluent Heat Exchange Material Receiving And Discharging Heat >Plural Intermediate Fluent Heat Exchange Materials

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The Patent Description & Claims data below is from USPTO Patent Application 20120285661, Vapor absorption system.

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CROSS-REFERENCE

This application claims the benefit of U.S. Provisional Application No. 61/433,165 filed Jan. 14, 2011, and U.S. Provisional Application No. 61/443,705, filed Feb. 16, 2011, which applications are entirely incorporated herein by reference.

BACKGROUND OF THE INVENTION

The present invention relates to a system and method for absorption of a vapor into a liquid. The system has many applications but is particularly useful for distillation of a liquid mixture such as water with impurities. It also has application as a heat transfer system. However, the system is not limited to these two applications.

Absorption, in chemistry, is a physical or chemical phenomenon or a process in which atoms, molecules, or ions enter some bulk phase by being taken up by the volume. In this application we are particularly concerned about the absorption of a vapor into a liquid.

Usual vapor absorption techniques have specific applications. They are usually relatively slow process unless some chemical reaction is occurring. Because of this, absorption processes have relatively limited application. However, the present invention has identified a method of obtaining a much faster rate of absorption where chemical interaction is not involved, with the result that vapor absorption systems may be used in applications where they were never previously considered, or at least not considered viable.

Following on from the new vapor absorption system which is disclosed herein, there are disclosed new and improved distillation systems and heat transfer system, making use of the vapor abortion system.

Distillation is of course, a well known process. It is used often where traditional filtration techniques have not been effective at purifying a liquid mixture. Conventional distillation requires the application of heat energy to cause the production of a vapor which is then passed through a condenser to condense the vapor back to a liquid for use. While conventional distillation is generally effective at purifying liquids such as water, the energy cost is substantial and often uneconomic. Improvements to the process have increased efficiency significantly, but the process has remained too expensive for purification of water for general use.

Efforts to improve the efficiency of the distillation process have included attempts at operation at reduced pressure. It is well known that vaporization of liquid occurs more rapidly when the pressure is reduced. However, such systems have had limited success due to difficulty and expense associated with an evacuating system in conjunction with the evaporation and condensing subsystems. An example of one attempt is that disclosed in U.S. Pat. No. 3,864,215 (Arnold). The system of that disclosure utilizes the low pressure region of a venturi to provide the reduced pressure. It was particularly applicable to a marine environment but retained some complexity in that it still incorporated a condenser.

Heat transfer systems are also well known. Air-conditioning and refrigeration systems form subsets of this broad category. It is well known that conventional heat exchange systems use very substantial amounts of energy in order to transfer energy. The use of new vapor absorption systems substantially improves the efficiency or C.O.P. (co-efficient of performance) of a heat transfer system.

SUMMARY

OF THE INVENTION

The invention resides in a vapor absorption system adapted to receive a vapor comprising a vacuum pump having an operating liquid wherein the vapor is received by an operating liquid and condensed therein to provide condensed liquid mixed with the operating liquid.

According to a preferred feature of the invention, the absorption of vapor within the system is effective to cause production of more vapor.

According to a preferred feature of the invention, the vacuum pump is a venturi vacuum pump and the operating liquid is a liquid which passes through the venturi vacuum pump to produce a vacuum operative on the vapor.

According to a preferred feature of the invention, a first heat exchange means is provided to support the production of vapor.

According to a preferred feature of the invention, a second heat exchanger is provided to expel heat from the operating liquid after it has passed through the venturi vacuum pump.

According to a preferred feature of the invention, the operating liquid is passed through the first heat exchanger to pass heat from the operating liquid to the first heat exchanger.

According to a preferred feature of the invention, condensed liquid derived from the vapor is removed for use.

According to the preferred embodiment, the system is a distillation system.

According to the preferred embodiment, the system is a heat transfer system.

According to the preferred embodiment, the operating liquid is circulated through the system.

According to a further aspect, the invention resides in a distillation system comprising an evacuation chamber adapted to receive a liquid mixture to be distilled, the evacuation chamber having a space above the liquid mixture filled with a gas, and a vacuum pump associated with the evacuation chamber and adapted in use to provide a reduced pressure within the gas to cause vaporization of the liquid mixture and wherein a primary liquid is passed in association with the gas in the evacuation chamber to receive and condense the vapor.

According to a preferred feature of the invention, at least a portion of the primary water is circulated through the vacuum pump.

According to a preferred feature of the invention, a first heat exchange means is provided to enable latent heat of vaporization to be received by the liquid mixture to support the vaporization of the liquid mixture.

According to a preferred feature of the invention, the first heat exchange means comprises features associated with the wall of the evacuation chamber to promote the receipt of the latent heat of vaporization from the surroundings.

According to a preferred feature of the invention, the first heat exchange means comprises a first heat exchange means associated with the evacuation chamber through which heat exchange fluid passes to surrender the latent heat of vaporization to the liquid mixture, the latent heat of vaporization being received by the heat exchange fluid from a source remote from the first heat exchanger.

According to the preferred embodiment, the vacuum pump is a venturi pump in use having a fluid flow through the venturi pump to provide a reduced pressure at a venturi throat section.

According to the preferred embodiment, the venturi pump has a venturi throat section configured to receive the gas from the evacuation chamber and the fluid flow is the primary liquid so that the venturi pump is operative to cause the reduced pressure of the gas in the evacuation chamber by receiving the gas into the primary liquid.

According to the preferred embodiment, porting is associated with the venturi the pump, the porting being adapted to convey gas to the venturi pump.

According to the preferred embodiment, heat within the primary water exiting the venturi pump is removed by means of a second heat exchange means.

According to the preferred embodiment, the second heat exchange means is associated with a pathway for the primary liquid which passes through ground to surrender heat to the ground.

According to the preferred embodiment, a liquid mixture control system to control the entry and exit of liquid mixture from the evacuation chamber.

According to the preferred embodiment, the liquid mixture to be distilled is water and the primary is a liquid immiscible with water.

According to the preferred embodiment, the primary liquid is oil.

According to a further aspect, the invention resides in a method of distillation of a liquid mixture using an evacuation chamber comprising vaporizing the liquid mixture by reducing the pressure within the evacuation chamber by means of a vacuum pump, to provide a distillation vapor and receiving and condensing the distillation vapor within a primary liquid passing in association with the distillation vapor.

According to a preferred feature of the invention, the vacuum pump is a venturi vacuum pump having a venturi throat section and the primary liquid passes through the venturi vacuum pump to provide a reduced pressure in the venturi throat region and distillation vapor is drawn into the venturi through porting at the venturi throat region and received and condensed by the primary liquid.

According to a preferred feature of the invention, at least a portion of the primary water is circulated.

According to a preferred feature of the invention, at least a portion of the primary water is circulated by being received from a holding tank and being returned to a holding tank after passing through the vacuum pump.

According to a preferred feature of the invention, a first heat exchange means is provided to enable latent heat of vaporization to be received by the liquid mixture to support the vaporization of the liquid mixture.

According to a preferred embodiment, the first heat exchange means comprises features associated with the wall of the evacuation chamber to promote the receipt of the latent heat of vaporization from the surroundings.

According to a preferred embodiment, the first heat exchange means comprises a first heat exchanger associated with the evacuation chamber through which heat exchange fluid passes to surrender the latent heat of vaporization to the liquid mixture, the latent heat of vaporization being received by the heat exchange fluid from a source remote from the first heat exchanger.

According to a preferred embodiment, heat within the primary water exiting the venturi pump is removed by means of a second heat exchange means.

According to a preferred embodiment, second heat exchange means is associated with a pathway for the primary liquid which passes through ground or cold water to surrender heat to the ground or cold water, respectively.

According to a preferred embodiment, the primary liquid is oil and the liquid mixture is a mixture of water and other substance or substances.

According to a further aspect, the invention resides in a heat transfer system comprising an evacuation chamber adapted to receive a first liquid, at least one venturi vacuum pump associated with the evacuation chamber to cause, in use, the pressure within the evacuation chamber to be reduced to promote vaporization of liquid in the chamber and to thereby cause cooling, and a first heat exchanger having a fluid pathway for a heat exchange fluid to pass through the first heat exchanger and being associated with the evacuation chamber to provide heat to the first liquid in the chamber to support the vaporization and thereby to cool the heat exchange fluid.

According to a preferred feature of the invention, vapor from the vaporization of the first liquid is received and condensed within a flow stream of a second liquid which passes through the at least one venturi vacuum pump to cause the reduced pressure.

According to a preferred feature of the invention, the flow stream of the second liquid passes through a second heat exchange system after exiting the venturi vacuum to thereby cool the second liquid.

According to a preferred feature of the invention, the second liquid is returned to the inlet of the venturi vacuum pump in cyclic manner.

According to a preferred feature of the invention, the first liquid and the second liquid are of the same substance and evacuation chamber and venturi vacuum pump form a closed system.

The invention will be more fully understood in the light of the following description of several preferred embodiments.

INCORPORATION BY REFERENCE

All publications, patents, and patent applications mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication, patent, or patent application was specifically and individually indicated to be incorporated by reference.

BRIEF DESCRIPTION OF THE DRAWINGS



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stats Patent Info
Application #
US 20120285661 A1
Publish Date
11/15/2012
Document #
13349378
File Date
01/12/2012
USPTO Class
16510413
Other USPTO Classes
16510427
International Class
28D15/00
Drawings
7



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