Sanitization system and system components

• US 7,767,168 B2
• Filed: 06/25/2004
• Issued: 08/03/2010
• Est. Priority Date: 06/26/2003
• Status: Active Grant

• Current Assignee: Tersano Inc.
• Original Assignee: Tersano Inc.
• Inventors: Namespetra, Justin L., Hickey, Scott P., Hengsperger, Steve L., Caldwell, Christopher B., Zulik, Richard S.
• Primary Examiner(s): Michener; Jennifer K
• Assistant Examiner(s): Tai; Xiuyu
• Application Number:
  US10/875,297
• Publication Number:
  US 20050017380A1
• Time in Patent Office: 2,230 Days
• Field of Search: 422/186.12
• US Class Current: 422/186.12
• CPC Class Codes: A61L 2/183 Ozone dissolved in a liquid
• CPC Class Codes: A61L 2/202 Ozone
• CPC Class Codes: A61L 2202/11 Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
• CPC Class Codes: C01B 13/10 Preparation of ozone
• CPC Class Codes: C01B 13/11 by electric discharge
• CPC Class Codes: C01B 2201/14 Concentric/tubular dischargers
• CPC Class Codes: C02F 1/001 Processes for the treatment of water whereby the filtration technique is of importance C02F1/44 takes precedence; construction of filters in general B01D24/00 - B01D41/00
• CPC Class Codes: C02F 1/003 using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices C02F9/20 takes precedence
• CPC Class Codes: C02F 1/008 Control or steering systems not provided for elsewhere in subclass C02F
• CPC Class Codes: C02F 1/20 by degassing, i.e. liberation of dissolved gases degasification of liquids in general B01D19/00; arrangement of degassing apparatus in boiler feed supply F22D
• CPC Class Codes: C02F 1/283 using coal, charred products, or inorganic mixtures containing them
• CPC Class Codes: C02F 1/32 with ultraviolet light
• CPC Class Codes: C02F 1/42 by ion-exchange ion-exchange in general B01J
• CPC Class Codes: C02F 1/444 by ultrafiltration or microfiltration
• CPC Class Codes: C02F 1/46 by electrochemical methods
• CPC Class Codes: C02F 1/727 using pure oxygen or oxygen rich gas
• CPC Class Codes: C02F 1/78 with ozone C02F1/4672 takes precedence
• CPC Class Codes: C02F 2201/782 Ozone generators
• CPC Class Codes: C02F 2201/784 Diffusers or nozzles for ozonation
• CPC Class Codes: C02F 2209/04 Oxidation reduction potential [ORP]
• CPC Class Codes: C02F 2209/42 : Liquid level
• CPC Class Codes: C02F 2301/024 : Turbulent
• CPC Class Codes: C02F 2301/026 : Spiral, helicoidal, radial
• CPC Class Codes: C02F 2303/18 : Removal of treatment agents after treatment
• CPC Class Codes: C02F 2307/04 : as part of a pitcher or jug

Abstract

A multi-use sanitization system is disclosed which includes one or more containers in fluid communication with other system components. Components of the system include an ozone contacting device, such as a vortex-venturi or a sparger, for incorporating ozone into a liquid, an ozone generator to provide ozone to the vortex-venturi, a fluid transfer valve to allow simultaneous flow of liquid into and out of the container, and a pump to promote fluid flow through the system. Optionally, a gas-liquid separator with an optional integral gas release valve, an ozone destructor, an oxidation-reduction potential ozone sensor, or a pour-through type pre-filter may be incorporated into the system.

Claims

1. A sanitization system for producing ozonated liquid, the system comprising:

a pump for circulating liquid through the system;

a fluid transfer valve for interfacing with a liquid source to be ozonated, allowing simultaneous flow into and out of the system;

an ozone generator for forming ozone to be incorporated into the liquid; and

a vortex-venturi for incorporating ozone into the liquid by providing accelerated entry of liquid into the vortex-venturi prior to mixing with the ozone, the vortex-venturi comprising;

an annular interior chamber with a central longitudinal axis, the annular interior chamber of the vortex-venturi having a widened initial section, a narrowed waist section with ozone entry ports positioned therein, and a widened mixed fluid outlet section from which ozonated liquid is released; and

a liquid inlet positioned tangential to the widened initial section of the annular interior chamber for tangential entry of the liquid into the annular interior chamber;

the tangential entry of the liquid inducing a vortex flow of the liquid within the annular interior chamber, the vortex flow having a center of rotation, and a low pressure zone being located in the center of rotation;

the ozone generator being in fluid communication with the vortex-venturi to provide ozone to the ozone entry ports positioned in the narrowed waist section of the annular interior chamber providing the ozone to the liquid in the low pressure zone.

2. The system according to claim 1, wherein the liquid source is contained within a container, the container being in fluid communication with the pump through the fluid transfer valve.

3. The system of claim 2, wherein a plurality of removable containers having fluid transfer valves disposed therein are used interchangeably.

4. The system of claim 2 wherein the pump, the ozone generator, and the vortex-venturi are disposed within a base.

5. The system according to claim 4, wherein the container is a removable container, the fluid transfer valve being incorporated into the removable container, and liquid is circulated into and out of the container through the fluid transfer valve, the fluid transfer valve allowing the container to be removed from the base while preventing the liquid from leaking from the container when the container is not in place.

6. The system of claim 1 wherein the ozone generator comprises a corona discharge ozone generator.

7. The system according to claim 6, wherein the corona discharge ozone generator creates ozone using a high voltage/high frequency power supply, said corona discharge ozone generator comprising:

an ozone generating chamber having open ends, and a high voltage electrode at each of the open ends;

insulating end caps disposed at terminal ends of the chamber, the caps having gas ports formed therein in a direction tangential to the chamber, allowing for vortex flow through the generator; and

a ground electrode comprising a metallic foil adhered to a dielectric material.

8. The system according to claim 1 additionally comprising an oxidation reduction potential (ORP) sensor in fluid communication with the system for detecting ozone level in the fluid.

9. The system according to claim 1, additionally comprising a gas-liquid separator downstream of the vortex-venturi for separating undissolved gasses from the ozonated liquid.

10. The system according to claim 9 additionally comprising an ozone destructor downstream of and in fluid communication with the gas-liquid separator, for destroying undissolved ozone gas arising from the gas-liquid separator.

11. The system according to claim 9, wherein the gas-liquid separator separates undissolved ozone gas using centrifugal force, the separator comprising:

an inlet through which a gas-liquid mixture arising from the vortex-venturi enters under pressure;

a channel following from the inlet;

means to force the gas-liquid mixture under pressure into a vortex within the channel so as to generate a centrifugal force to move undissolved ozone gas to the center of the channel and liquid to the perimeter of the channel;

a slot positioned around the inside of the channel through which a portion of the liquid is drawn off;

an annular chamber in communication with the slot through which the liquid passes; and

a gas release valve comprising a gas release port within the channel through which gas exits the channel.

12. The system according to claim 11 additionally comprising a float for interacting with liquid in the chamber to close the gas release port when the liquid level is high.

13. The system according to claim 1, additionally comprising a capacitor-coupled detector of high voltage and high frequency power supply to verify the supply of power to the ozone generator, the capacitor-coupled detector comprising:

a first wire contacting a high voltage/high frequency lead to the ozone generator;

a second wire in close proximity to the high voltage/high frequency lead to the ozone generator, capacitance being formed due to close proximity of the first wire and the second wire; and

a detection circuit in communication with the second wire, for detecting the capacitance comprising a microprocessor and a monostable, to verify a supply of power to the ozone generator.

14. The system according to claim 13 wherein said detection circuit is powered by an external power source or through said capacitance.

15. The system according to claim 1 additionally comprising an oxidation reduction potential sensor comprising:

a reference electrode made from silver or plated silver;

an ORP sensing electrode made from platinum, plated platinum, gold or plated gold;

an ORP sensor in fluid contact with the water path; and

a continuously monitoring sensor that controls the process time.

16. The system according to claim 1 additionally comprising a pour-through filtration unit.

17. The system according to claim 1 wherein the fluid transfer valve is a check valve.

18. The system according to claim 1 wherein the fluid transfer valve is a double check valve.

19. The system according to claim 4, wherein the container is a removable container, the removable container comprises the fluid transfer valve, and liquid is circulated into and out of the container through the fluid transfer valve, the fluid transfer valve allowing the container to be removed from an interface with the base and preventing the liquid from leaking from either the base or the container when the container is not in place.

20. A vortex-venturi for incorporating a gas into a liquid, comprising:

a cylindrical body with an annular interior chamber, a liquid inlet, a gas inlet, and a gas-liquid mixture outlet, the annular interior chamber having a helical path between the liquid inlet and the gas-liquid outlet;

the annular interior chamber comprising a widened initial section decreasing in diameter to form a narrowed waist section of a substantially cylindrical configuration, and a widened outlet section expanding to an increasing diameter relative to the narrowed waist section, the narrowed waist section having gas entry ports positioned therein;

wherein the liquid inlet is positioned tangential to the widened initial section;

wherein the tangential entry of the liquid induces a vortex flow of the liquid within the annular interior chamber, the vortex flow having a center of rotation, and a low pressure zone being located in the center of rotation; and

wherein the gas enters the annular interior chamber through the gas entry ports positioned in the narrowed waist section, the gas entry ports providing the gas to the liquid in the low pressure zone.

21. The vortex-venturi of claim 20, having one or more vanes formed in the annular interior chamber on a surface of the widened outlet section.