METHOD, A BUBBLE GENERATING NOZZLE, AND AN APPARATUS FOR GENERATING MICRO-NANO BUBBLES

• US 20150273408A1
• Filed: 06/13/2013
• Published: 10/01/2015
• Est. Priority Date: 06/13/2013
• Status: Active Grant

• Current Assignee: SIGA Technologies, Inc.
• Original Assignee: Sigma-Technology, Inc.
• Inventors: Tachibana, Yoshiaki, Tamahashi, Kunihiro, Tachibana, Kousuke, Harada, Kaoru, Sasajima, Souzou, Honma, Kyoko, Matsumoto, Yuuki
• Granted Patent: US 10,293,309 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B01F 2101/48 Mixing water in water-taps with other ingredients, e.g. air, detergents or disinfectants
• CPC Class Codes: B01F 23/23121 having injection means, e.g. nozzles with circumferential outlet
• CPC Class Codes: B01F 23/2319 Methods of introducing gases into liquid media
• CPC Class Codes: B01F 23/2323 by circulating the flow in guiding constructions or conduits
• CPC Class Codes: B01F 23/2373 for obtaining fine bubbles, i.e. bubbles with a size below 100 µm
• CPC Class Codes: B01F 25/23 Mixing by intersecting jets
• CPC Class Codes: B01F 25/45211 the elements being cylinders or cones which obstruct the whole diameter of the tube, the flow changing from axial in radial and again in axial
• CPC Class Codes: B01F 25/72 with nozzles
• CPC Class Codes: B01F 35/3204 Motor driven, i.e. by means of an electric or IC motor
• CPC Class Codes: B01F 35/32045 Hydraulically driven
• CPC Class Codes: B01J 19/26 Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
• CPC Class Codes: B01J 2219/00162 controlling the pressure
• CPC Class Codes: B01J 7/00 Apparatus for generating gases production of inert gas mixtures B01J19/14; for generating specific gases, see the relevant subclasses, e.g. C01B, C10J ; in "air bags" on vehicles B60R21/26; for starter gas F02C7/26; blasting cartridges for producing gas under pressure F42B3/04
• CPC Class Codes: C02F 1/34 with mechanical oscillations
• CPC Class Codes: C02F 1/72 by oxidation C02F1/4672 takes precedence
• CPC Class Codes: C02F 1/722 Oxidation by peroxides
• CPC Class Codes: C02F 1/76 with halogens or compounds of halogens C02F1/4674 takes precedence
• CPC Class Codes: C02F 1/78 with ozone C02F1/4672 takes precedence
• CPC Class Codes: C02F 2303/04 Disinfection
• CPC Class Codes: D06F 35/002 using bubbles

Abstract

A new method for generating micro-nano bubbles that uses water hammering, a bubble generating nozzle, and an apparatus for generating micro-nano bubbles are provided to construct a system. The system is for generating micro-nano bubbles in a large amount using only pure water, which does not include any nucleating agents, and for performing not only a clean washing and sterilization but also generation of uncontaminated micro-nano bubbles. The method defined in the present invention uses water hammering power produced by a mutual collision of jets of dissolved-gas-including solution squirted from two or more spouts. The bubble generating nozzle by the present invention has a configuration, comprising: a hollow cylinder having two or more small through-holes arrayed in the circumferential direction thereof and a micro-nano bubble discharge port provided on the both ends of the hollow cylinder, wherein the small through-holes are arranged so that all of their extension lines passing through respective center of the cross-section of each of the small through-holes intersect each other in the inside of the hollow of the cylinder. The apparatus for generating bubble by the present invention has such bubble generating nozzle and has a configuration that enables generation of micro-nano bubbles in a large amount.

Claims

1. (canceled)

2. A method for generating micro-nano bubbles, wherein the method uses water hammering power to generate micro-nano bubbles, wherein micro-nano bubbles are generated by a mutual collision of jets of a dissolved liquid of a gas-liquid mixture state;

the collision of jets is created inside a cylinder having two or more small through-holes arrayed in the circumferential direction thereof with such a configuration that the respective opening of such two or more small through-holes are arranged facing each other in the same plane; and

the jets of the dissolved liquid are produced by injecting the liquid from the outside of the cylinder via the small through-holes in the cylinder at a pressure higher than the atmospheric pressure.

3. The method for generating micro-nano bubbles according to claim 2, comprising:

a sucking process that sucks gas and liquid;

a pressurization process that pressurizes gas and liquid;

a dissolved gas enriching process, wherein the pressurized gas-including liquid is mixed with another new gas; and

a dissolved gas miniaturization process that generates micro-nano bubbles,

wherein a dissolved liquid of a gas-liquid mixture state prepared at the dissolved gas enriching process is injected from the outside of the cylinder having two or more small through-holes arrayed in the circumferential direction thereof with such a configuration that the respective opening of such two or more small through-hole are arranged facing each other in the same place via such small through-holes at a pressure higher than the atmospheric pressure to produce jets of the liquid, and the jets are collided mutually inside the cylinder.

4. The method for generating micro-nano bubbles according to claim 2 or claim 3, wherein the pressure of being more than the atmospheric pressure at the time of squirting is 0.2 to 0.6 MPa, and the diameter of the small through-holes at the part leading to the hollow of the cylinder is 0.1 to 6.0 mm.

5. The method for generating micro-nano bubbles according to any of claims 2 to 4, wherein the dissolved liquid is an aqueous solution that includes at least one of substance selected from the group consisting of ozone, oxygen, hydrogen peroxide, chloric acid, perchloric acid, and potassium permanganate.

6. The method for generating micro-nano bubbles according to any of claims 2 to 4, wherein the dissolved liquid is an aqueous solution that includes a substance selected from the group consisting of carbon dioxide, hydrogen gas, and nitrogen gas.

7. A bubble generating nozzle for use in the generating of micro-nano bubbles using water hammering power, comprising:

a hollow cylinder having two or more small through-holes arrayed in the circumferential direction thereof with such a configuration that the respective opening of each of such two or more small through-holes faces each other in the same plane and

a micro-nano bubble discharge port provided on at least one end of the hollow cylinder,

wherein the small through-holes are arranged so that all of their extension lines passing through respective center of the cross-section of each of the small through-holes intersect each other in the inside of the hollow of the cylinder.

8. The bubble generating nozzle for generating micro-nano bubbles according to claim 7, wherein the nozzle has two or more numbers of hollow cylinders.

9. The bubble generating nozzle for generating micro-nano bubbles according to claim 8, wherein the hollow cylinders of two or more numbers are arranged in parallel to or perpendicular to the direction of the inflow or the discharge of the flow of the dissolved liquid.

10. The bubble generating nozzle for generating micro-nano bubbles according to any of claims 7 to 9, wherein the hollow cylinder has, in its longitudinal direction, a multi-row of two or more rows of small through-holes, and each of such rows consists of two or more small through-holes.

11. The bubble generating nozzle for generating micro-nano bubbles according to any of claims 7 to 10, wherein the diameter of the small through-hole at the part that leads to the hollow of the hollow cylinder is 0.1 to 6.0 mm.

12. The bubble generating nozzle for generating micro-nano bubbles according to any of claims 7 to 11, wherein the diameter of the micro-nano bubble discharge port provided on at least one end of the hollow cylinder is equal to or larger than the diameter of a part of the hollow cylinder, wherein such part is such a part where the small through-holes are arranged in a circumferential direction.

13. An apparatus for generating micro-nano bubbles, comprising:

a means for sucking each of gas and liquid;

a means for pressurizing the gas and the liquid in a lump and transferring them;

a gas-liquid mixing vessel for enriching the dissolved gas by mixing the transferred liquid, which includes the gas, with another new gas; and

a means for generating micro-nano bubbles in the gas-liquid mixing vessel using the dissolved liquid of the gas-liquid mixing state, wherein the means has the bubble generating nozzle for generating micro-nano bubbles as described in any of claims 7 to 12.

14. The apparatus for generating micro-nano bubbles according to claim 13, wherein, in the means for generating micro-nano bubbles, the dissolved liquid is squirted at a pressure of 0.2 to 0.6 MPa through the small through-hole of the bubble generating nozzle.

15. The apparatus for generating micro-nano bubbles according to claim 13 or 14, wherein the gas-liquid mixing vessel has the bubble generating nozzle for generating micro-nano bubbles, and the liquid that includes the gas transferred by the means for pressurizing and transferring is discharged into the gas-liquid mixing vessel by the bubble generating nozzle.

16. The apparatus for generating micro-nano bubbles according to any of claims 13 to 15, wherein the gas-liquid mixing vessel has a float valve inside or outside the vessel to maintain the volume of the gas and the liquid and the internal pressure inside the vessel always within a prescribed range by discharging excess gas from the vessel.

17. The apparatus for generating micro-nano bubbles according to any of claims 13 to 16, wherein a pump or piping, or both, through which the gas-liquid mixture liquid flows, is made of plastic.

18. The apparatus for generating micro-nano bubbles according to claim 17, wherein a pump or piping, or both, through which the gas-liquid mixture liquid flows, is made of fluorine resin.

19. The apparatus for generating micro-nano bubbles according to any of claims 13 to 18, wherein the means for pressurizing and transferring the liquid that includes the gas is an apparatus that uses a compressed-air driven or an electric motor driven bellows cylinder pump.

20. The apparatus for generating micro-nano bubbles according to any of claims 13 to 19, wherein the dissolved liquid is an aqueous solution that includes at least one of substance selected from the group consisting of ozone, oxygen, hydrogen peroxide, chloric acid, perchloric acid, and potassium permanganate.

21. The apparatus for generating micro-nano bubbles according to any of claims 13 to 19, wherein the dissolved liquid is an aqueous solution that includes a substance selected from the group consisting of carbon dioxide, hydrogen gas, and nitrogen gas.