JP4969939B2 - Ultrafine bubble generation method - Google Patents

Description

  The present invention relates to an ultrafine bubble generation method and generator, and more particularly, to an ultrafine bubble generation method and generator by jetting high pressure fluid, and further to an ultrafine bubble generation method and generator combined with ionization treatment. And the generator.

  In recent years, ultra-fine bubbles (hereinafter also referred to as “nanobubbles”) have been described as having high internal pressure and high surface activity that can be effectively used for purification of polluted water, application to living bodies, or chemical reactions. Attention has been focused on, for example, Patent Documents 1 and 2 propose nanobubble generation methods and generation apparatuses, and nanobubble utilization methods and apparatuses.

The nanobubble generation method proposed in Patent Documents 1 and 2 is a combination of an electrolyzer and an ultrasonic generator, and more specifically, oxygen and ozone bubbles generated by the electrolyzer are electrolyzed. It is crushed by ultrasonic vibration from an ultrasonic generator provided at the bottom of the substrate, refined, and generates nanobubbles.
JP 2003-334548 A JP 2004-121962 A

  However, in order to generate a large amount of nanobubbles with the conventional nanobubble generator, it is necessary to increase the size of the electrolysis apparatus and the ultrasonic generator, which complicates the entire apparatus and consumes power. As a result, the cost of generating nanobubbles becomes very high. In these apparatuses, only treatment of water-based fluids such as waste water is described, and application to other types of fluids is not considered at all.

  In recent years, purification of sewage and wastewater has attracted attention, but the amount of treatment per hour is not sufficient. Furthermore, it is desired to provide various effects in other types of fluids.

  In view of the above problems, it is an object of the present invention to provide a method and apparatus for generating ultrafine bubbles and a processing apparatus using the generator that can generate ultrafine bubbles with a fluid to be processed with a simple structure.

  In order to achieve the above object, the method for generating ultrafine bubbles according to the present invention generates ultrafine bubbles by injecting a high-pressure fluid into a raw fluid to be processed, and a plurality of injections formed by the injection of the high-pressure fluid. The direction of each jet line is made different so that the line passes through a predetermined small region of the raw fluid.

  More specifically, the following are provided.

(1) A method for generating ultrafine bubbles by injecting a high-pressure fluid into a raw fluid to be processed to generate ultrafine bubbles, wherein a plurality of injection lines formed by the injection of the high-pressure fluid are predetermined for the original fluid. Thus, it is possible to provide a method for generating ultrafine bubbles, characterized in that the directions of the respective injection lines are made different so as to pass through the small region.

  Here, the fluid may include waste water, sewage, other aqueous liquids or fluids, may include hydrocarbon liquids or fluids such as gasoline, light oil, and heavy oil, and may include other liquids. The high pressure fluid may mean a fluid having a pressure of 5 MPa or more, more preferably 10 MPa or more, and still more preferably 15 MPa or more. However, considering industrial productivity and the like, a fluid having a pressure of 10 MPa or less, more preferably 5 MPa or less, and still more preferably 1 MPa or less is desired. Here, the high-pressure fluid can be used by compressing the raw fluid, may be simply pressurized by a pump or the like, and may be subjected to another treatment. In particular, an ionization treatment that is preferable for generating ultrafine bubbles can be performed.

  An injection line may mean what draws the injection locus of the injected fluid formed by injection of a high-pressure fluid. When an injection line formed by injection from a nozzle or the like is formed in the raw fluid, the boundary of the injection line tends to be unclear immediately after injection due to interference with the raw fluid around the injection line. However, a line extending straight in the direction of the injection line immediately after injection can also be called an injection line. Further, the thickness of the injection line may be based on the diameter (in the case of a circle or a substantially circular cross-sectional area) of an injection hole (for example, a nozzle) through which high-pressure fluid is injected. When the shape of the injection hole is a rectangle, an ellipse, or another shape, a characteristic dimension generally used for fluid can be set as the thickness.

  The direction of the jet line is substantially equal to the jet direction when the high-pressure fluid is jetted. This jet preferably has a relatively high coherence according to the terminology used for light or the like. Therefore, it is not preferable to spray a hemisphere at the moment of exiting the nozzle like a sprayer. Since the injection lines in different directions pass through a predetermined small area (this is a small area to some extent), the injection lines may intersect each other, or at least two injection lines may intersect. More preferred. Such a plurality of injection lines may include a case where injection is performed from a plurality of three-dimensionally equivalent positions toward one point. Moreover, the case where two or more injection lines pass in a predetermined plane and inject | pour so that it may cross | intersect at a certain intersection can also be included. For example, the case where a high-pressure fluid is ejected from an opposing nozzle placed in a predetermined plane and the ejection lines collide with each other can be included.

(2) The method for generating ultrafine bubbles according to (1) above, wherein the predetermined small region is a substantially sphere having a typical length not more than twice the thickness of the injection line. can do.

  Here, the predetermined small region is a region virtually imagined by the raw fluid, and its shape is not limited, but a spherical shape, an elongated spherical shape (for example, a shape like a rugby ball, a flat shape in which a sphere is crushed, It is preferably a shape like an erythrocyte). Typical length can mean a characteristic dimension commonly used with fluids. For example, the diameter of a sphere.

(3) The plurality of injection lines include three or more injection lines in different directions, and when any two injection lines intersect at a predetermined intersection in the predetermined small area, Any of the above-mentioned (1) or (2) can be provided with the method for generating ultrafine bubbles, which does not pass through the intersection.

  As an example of such an injection line, two injection lines intersect each other in a certain virtual plane, and the third injection line has two injection lines and a second one at a position different from the first intersection. There are cases where two and three intersections intersect, and these three intersections may be within a predetermined small region (in this case, within a planar region within the virtual plane). At this time, it is more preferable that the region surrounded by the three intersections is jetted in a vortex according to the jetting directions of the three jet lines. This is because the vortex is generated in the raw fluid, and the raw fluid is sufficiently stirred.

(4) Further, a second plurality of injection lines different from the plurality of injection lines that pass through the predetermined small area outside the predetermined small area and in the second predetermined small area. The method for generating ultrafine bubbles according to any one of (1) to (3) above, wherein the high-pressure fluid is ejected so as to pass therethrough.

  As described above, when the second small region is provided as the passage region for the plurality of injection lines in addition to the predetermined small region (first small region), ultrafine bubbles may be generated in each small region. And the amount of ultrafine bubbles generated can be increased.

(5) Any one of (1) to (4), wherein the plurality of injection lines have a common injection direction component, and flow is generated in the source fluid by the injection direction component. It is possible to provide a method for generating ultrafine bubbles.

  Here, the common injection direction component can mean a common direction component when the injection direction of each injection line is disassembled. More specifically, when two injection lines have the same injection direction, all of the respective injection directions become a common injection direction component, and when two injection lines are injected in opposite directions, a common injection There will be no direction component. Such a common jet direction component can influence the raw fluid and cause the raw fluid to flow in a certain direction.

(6) The method for generating ultrafine bubbles according to any one of (1) to (5) above, wherein the high-pressure fluid is subjected to an ionization treatment before jetting.

  Here, when the raw fluid is an aqueous fluid, the ionization treatment is performed by passing a fluid at a high pressure through a reaction vessel filled with a ceramic molded body in which aluminum oxide and barium titanate are dispersed. It can be carried out. An example of such a ceramic molded body is one in which a mixture of barium carbonate, titanium oxide and aluminum oxide is fired at a temperature in the range of about 1000 ° C. to about 1500 ° C. using clay as a binder.

(7) The method for generating ultrafine bubbles according to any one of (1) to (6) above, wherein ionized gas is supplied in the vicinity of a predetermined small region of the raw fluid.

  Here, the ionization process may mean a process to which a stable ionization method is applied. This stable ionization method may include, for example, a method of generating air containing a large amount of negative ions. It can be exemplified that air containing a lot of negative ions is supplied in the vicinity of a predetermined small area. For example, the air supplied along the direction of the common injection direction component and in the vicinity of the predetermined small area, according to the direction of the direction, flows into the predetermined small area. Can be supplied to.

(8) The ultrafine bubble generating method according to any one of (1) to (7) above, wherein the ionized gas contains oxygen.

(9) The method for generating ultrafine bubbles according to any one of (1) to (8) above, wherein the raw fluid contains, for example, a hydrocarbon.

(10) A processing apparatus using the method for generating ultrafine bubbles described in any one of (1) to (9) above can be provided.

  The method for generating ultrafine bubbles according to the present invention includes the method for generating ultrafine ionized bubbles, and by providing the above configuration, the ultrafine bubbles can be generated directly and in a large amount directly in the raw fluid.

  In addition, the ultrafine bubble generation apparatus using the ultrafine bubble generation method can directly generate ultrafine bubbles or ultrafine ionized bubbles in a raw fluid to be processed continuously and in large quantities. It is simple, the service life can be extended, and the initial cost and running cost can be kept low.

  In addition, the processing apparatus according to the present invention can further promote the activation of the ultrafine bubbles by combining the ultrafine bubble generating apparatus with an ionization processing apparatus using a stable ionization method.

  The processing apparatus according to the present invention can improve processing efficiency by further combining with an ionization processing apparatus that performs ionization processing.

  Embodiments of the present invention will be described below in more detail with reference to the drawings. In addition, the same code | symbol is used for the same element and the overlapping description is abbreviate | omitted.

  FIG. 1 is a diagram showing an overall block diagram of an ultrafine bubble generating apparatus 10 to which an ultrafine bubble generating method of the present invention is applied. FIG. 2 is a cross-sectional view showing a high-pressure injector 28 that embodies the injection means of the ultrafine bubble generator of FIG. FIG. 3 is a schematic diagram schematically showing the ultrafine bubble generating device (control unit is omitted) 11 of FIG. FIG. 4 is a schematic cross-sectional view when the ionization means 14 of the ultrafine bubble generating apparatus of FIG. 1 is embodied in two types of ionization processes. In the ultrafine bubble generator 10, the high-pressure pump 12, the ionization means 14, and the injection means 16 are connected in this order by a pipe 24 with the valve 20 interposed therebetween. Further, the stable ionization means 50 is connected to the injection means 16 via a pipe 52 as a component having a function similar to that of the ionization means 14. These components are controlled by the control means 18 via communication lines 18a, 18b, 18c, 18d, 18e, 18f, 18g, and 18h regardless of wired / wireless. Each component will be described in more detail later.

  The high-pressure pump 12 sucks up the fluid by a pipe 22 a having a suction port in the raw fluid reservoir 100 to be processed, and returns the fluid that has overflowed in the high-pressure pump 12 to the raw fluid reservoir 100. 22b is connected. The fluid pressurized by the high-pressure pump 12 is introduced into the ionization means 14 via the pipe 24, and further, the high-pressure injector 28 which is the injection means 16 put into the raw fluid reservoir 100 via the pipe 24. From high pressure. Further, this is not necessarily required to circulate the raw water, but can be applied to a case where the raw water is purified by the fluid pressurized by the high pressure pump 12, for example, by sucking seawater.

  The high-pressure injector 28 includes a main pipe 30 that is a relatively thick pipe through which raw fluid is sucked and discharged, a jacket pipe 32 that is an outer pipe that surrounds the main pipe 30 in a concentric manner, and the jacket pipe 32. A pipe 24 that feeds high-pressure fluid into a chamber 25 that is a space between the inside of the main pipe 30 and the outside of the main pipe 30, and a plurality of jets that inject the fed high-pressure fluid into the raw fluid introduced inside the main pipe 30 And nozzles 34 and 36. The plurality of injection nozzles 34 and 36 are provided so as to be substantially opposed to the central axis of the main pipe 30, but slightly downward in the drawing of FIG. 2 (the horizontal main pipe 30 in the schematic view of FIG. 3). It is fixed in a tilted direction (to the left which is the exit direction) on the axis. The raw fluid is stored in the storage unit 100 under atmospheric pressure, and the conditions are substantially the same inside the main pipe 30. In this raw fluid, high-pressure fluid is ejected from ejection nozzles 34 and 36 having a diameter appropriately selected from about 0.2 to about 2 mm and a length of about 20 to about 50 mm. Nano bubbles are generated.

  The jet lines of the high-pressure fluid jetted from the jet nozzles 34 and 36 do not face each other in the opposite direction but are slightly inclined and are downward in FIG. 2 (a), respectively. Therefore, it has a directional component common to the flow direction of the raw fluid (see FIG. 2D). Therefore, the raw fluid introduced into the main pipe 30 from the inlet 30a flows downward (leftward in FIG. 3) in FIG. 2A and flows out from the outlet 30b. For this reason, since the raw fluid with a high nano bubble density flows through the main pipe 30 sequentially and does not stay, it is preferable.

  The common direction component will be described in detail with reference to FIG. FIG. 2D shows how the high-pressure fluid ejected from the ejection hole 34a of the ejection nozzle 34 forms the ejection line 34b. The thickness of the injection line 34b does not change much from the outlet of the injection hole 34a, and has the same thickness as the diameter of the injection hole 34a. This injection has a vector injection speed and momentum indicated by an arrow 34c in the drawing. The injection lines injected from the injection nozzle 36 in FIG. 2A also have similar vector injection speeds and momentums, but each has a common direction component along the axis of the main pipe 30 (in the injection nozzle 34). , Vector 34e). The raw fluid in the main pipe 30 is pushed down along the axis by the common direction component 34e of this injection. The ratio of the common direction component at this time is considered with respect to the entire vector 34c. Since the sum of the normal direction component 34d and the axial direction component 34e becomes 34c, the ratio can be 34e vs. 34d (or 34e / (34e + 34d)). The ratio of the common directional components or the angle θ formed by 34c and 34d can be obtained from experience. Under certain conditions, it is preferably about 60 ° or less, more preferably about 45 ° or less. . Moreover, about 0 degree or more is preferable, More preferably, it is about 15 degree or more.

  The injection nozzles 34 and 36 protrude from the inner surface of the main pipe 30, and the respective injection holes 34a and 36a are close to each other. For this reason, the jet lines of the jetted high-pressure fluid can intersect each other without extending so long. In other words, these injection lines are designed to pass through the predetermined small small area 200, and for example, the injection holes 34 a and 36 a of the injection nozzles 34 and 36 are areas 210 larger than the predetermined small small area 200. It is preferable that they are gathered inside. FIGS. 2B and 2C are a front view and a side view of such a small region 200 and the region 210, respectively. In the front view, the front views of the small region 200 and the region 210 are both substantially circular, and their diameters are d and D. FIG. 2C shows a side view of these regions in FIG. The side views of the small region 200 and the region 210 are both crushed and in a rugby ball state in a side view, but in a three-dimensional manner, they have a flat red blood cell shape (or disc shape). The compressed widths at this time are w and W, respectively, and D / W and d / w can be defined as the flat deformation ratio. Moreover, (dw) / d and (DW) / D can be defined as the flatness. For example, it is in a region where the raw fluid exists, and preferably has a substantially spherical shape, or a flat spherical shape or a disk shape in which the spherical shape is flattened (or crushed). The length characterizing these shapes is, for example, a diameter in the case of a spherical shape, and a thickness and / or a diameter of the original sphere can be exemplified in the case of a flat spherical shape. As such a small region 200, for example, if it is a spherical shape, the diameter is about 20 mm or less, more preferably about 15 mm or less, and still more preferably about 10 mm or less. Similarly, the region 210 has a diameter of about 30 mm or less, more preferably about 25 mm or less, and still more preferably about 20 mm or less. This spherical shape can also be applied to a case where the spherical shape is crushed to about 1/2 in the axial direction of the main pipe 30, for example.

  In this way, allowing a plurality of injection lines to pass through a predetermined small area can mean that the injection lines substantially intersect. As will be described later, it is considered undesirable for a plurality of three or more injection lines to substantially intersect at one point. This is because it is considered that the generated nanobubbles are more difficult to diffuse.

  Moreover, although the injection nozzles 34 and 36 protrude from the inner side surface of the main pipe 30, it is considered that it is more preferable to take such a structure. For example, when the inner diameter of the main pipe 30 is reduced to be approximately the same size as the predetermined region 210, the injected high-pressure fluid cannot extend while drawing an injection line, This is because the pressure may result in an abnormally high pressure.

  FIG. 4 is a cross-sectional view schematically showing an ionization processing apparatus 15 which is an example of ionization means. FIG. 4A shows a state where the ceramic 40 used in the apparatus has a ball shape and is held in a cage 41. A high-pressure fluid (for example, water) is introduced into the ionization processing device 15 from the opening 24a on the left side in the drawing, and flows into the space 39a that expands in a fan shape. To do. Further, in the vicinity of the outlet opening 24b from which the fluid exits, the space 39b is narrowed in an inverted fan shape, so that the time for contact with the surface of the ceramic ball 40 increases. This ceramic ball 40 has a mixture of barium carbonate, titanium oxide and aluminum oxide, as described in JP-A-8-217421, etc., in the range of about 1000 ° C. to about 1500 ° C. using clay as a binder. It is a ceramic molded body fired at.

  FIG. 4B schematically shows a cross section of an ionization processing apparatus 15 according to another embodiment. The internal space structure for housing the ceramic ring 42 is substantially the same as that described above in the high-pressure fluid introduction hole 24a, the enlarged space 39a, the reduced space 39b, and the outlet 24b, and thus the description thereof is omitted here. The ceramics ring 42 accommodated in the internal storage space of the ionization processing device 15 is fixed so as not to be shifted left and right in the figure with respect to the shaft 43 passing through the central opening. Since the shaft 43 is attached to the inner surface of the ionization processing device 15, the ceramic ring 42 does not shift in the flow direction even when a high-pressure fluid flows.

  FIG. 5 is a diagram schematically showing an ultrafine bubble generating apparatus (a control unit is omitted) 60 according to another embodiment. Many components are the same as those in FIG. 3, and thus redundant description is omitted. In this embodiment, in addition to the configuration of FIG. 3, a stable ionization processing device 50 is further added. Details of the stable ionization apparatus 50 are schematically shown in FIG. 9A and 9B show various members when the gas supplied from the stable ionization apparatus 50 is supplied to the nozzle position of the high-pressure injector 228 (that is, the larger predetermined region). The positional relationship is schematically shown. The basic configuration of FIG. 9 is almost the same as that of FIG.

  In the stable ionization processing apparatus 50, air is introduced through a tube 51 from an opening that is open to the atmosphere, passes through a ceramic 53 and a heater 54, passes through electrode plates 55 and 56, and exits air containing a large amount of negative ions. Then, it is fed through the pipe 52 and supplied to the region 210 on the back surface of the opposed injection nozzles 34 and 36 via the inner pipe nozzle 70.

  As shown in FIG. 6, the stable ionization processing apparatus 50 generates negative ions by adjusting the temperature of the ceramics and the heater, and then avoids the disappearance due to the adhesion of the negative ions to the metal tube 50a. Is a device for flowing air with increased negative ions, which applies a weak voltage (for example, -2.0 to +2.0 V) and stably generates negative ions by resistance measurement and temperature adjustment. This resistance measurement is performed by the resistance measuring device 57, the result is reflected by the temperature adjusting device 58, and the temperature of the heater 54 is adjusted. A certain amount of pressure is applied so that the air introduced at this time can be supplied into the region 210 described above.

  FIG. 7 shows a cross-sectional view of another embodiment of a high pressure injector 128. Since this basic structure is almost the same as that of FIG. 2, a duplicate description is omitted. In this embodiment, two more injection nozzles 35 and 37 are similarly arranged in the axial direction of the main pipe 30 and upstream of the flow of the raw fluid. The injection holes 35a and 37a of the injection nozzles 35 and 37 are similarly arranged in the region 210 ′, and the injection lines to be injected respectively pass through the smaller subregion 200 ′. Intersect (or collide) within the small region 200 '.

  FIG. 8A shows a high-pressure injector 28 'according to another embodiment in a front view. Since the basic configuration is the same as that of FIGS. In this figure, the injection nozzles 134, 135, and 136 have regions 230 in which these injection holes 134 a, 135 a, and 136 a are arranged in a relatively flat disk shape perpendicular to the axis of the main pipe 30. Yes. In this disk shape, the injection nozzles 134, 135, 136 are disposed at substantially equivalent positions. Specifically, the injection nozzles 134, 135, 136 are fixed to the inner surface of the main pipe 30 in directions rotated 120 degrees each. In this way, in the small region 220 smaller than the region 230, the injection lines 134b, 135b, and 136b injected from the injection holes 134a, 135a, and 136a pass through the small region 220, respectively. At this time, it is preferable that the injection lines are arranged so as to surround a certain area as schematically shown in FIG. 8B, rather than intersecting each injection line at one point. This is because it is considered that nanobubbles generated by jetting are diffused efficiently. Moreover, it is because it is comparatively few to stop the momentum of the other party's injection line by the intersection of injection lines, and an injection line can fully extend.

  FIG. 10 summarizes the results of tap water treated by the ultrafine bubble generator shown in FIGS. The high-pressure pump used here functions at a three-phase AC power supply of 200 V and 3.7 kw / 50 Hz, and the discharge amount was 10 L / min. The inner diameter of the main pipe 30 was 30 mm, and the jet nozzles of the high pressure injector were arranged so as to face inward at positions rotated about the axis of the main pipe 30 by 120 degrees. Further, the projecting length from the inner surface of each of the injection nozzles 134, 135, 136 was about 10 mm, and the region 230 into which the injection holes 134a, 135a, 136a entered was a spherical shape having a diameter of about 10 mm. Each jet line was arranged so as to pass through a substantially spherical small region having a diameter of about 1 mm. The diameter of each injection hole was 0.3 mm.

  Tap water was stored in a water tank, which is the raw fluid storage unit 100 shown in FIG. 3, and a high-pressure injector 28 'was placed therein, and a pressure of 5.0 MPa was applied by a high-pressure pump. When tap water was processed without using the ionization means 14 in such a state, the result shown in the lower part of the lower table of FIG. 10 was obtained. In other words, the raw water temperature increased from 22.3 ° C. to 29.7 ° C. after 30 minutes, and the hydrogen ion concentration increased from 7.00 to 7.09.

  In the case of using the ionization means 14, the raw water temperature increases from 23.6 ° C. to 31.0 ° C. after 30 minutes, and the hydrogen ion concentration increases from 7.01 to 7.38. did.

  The results of the hydrogen ion concentration are summarized in a graph and shown in FIG. In all cases, the hydrogen ion concentration increases with the passage of time, and it can be determined that there are ionization and cavitation effects.

  A similar apparatus was used to treat the fluid in the same manner. At this time, the number of injection nozzles incorporated in the apparatus was 6, and each was arranged at an equivalent position in a circularly symmetric position. Although ionization is performed at this time, it is needless to say that the main fluid is light oil and does not necessarily have the same effect as the aqueous fluid. In addition, although the ionization process is performed by the ionization processing apparatus which is an ionization means, the clear mechanism is not necessarily clear. In addition, in Unexamined-Japanese-Patent No. 8-217421, it describes about the water-soluble liquid, and the effect in light oil is not specified. Moreover, since the evaluation of the processing result of light oil cannot be performed by hydrogen ion concentration, the result was evaluated by evaluation of combustibility. FIG. 12 explains the evaluation method.

  Combustion time was used to evaluate the combustibility of light oil used as fuel. As a constant-volume combustor for the pseudo-flammability test, FIA-100 (Fuel Ignition Analyzer) manufactured by FUELTECH was used. The combustion time that serves as an index can be evaluated by the time from when the fuel is injected to the end of 95% combustion (because the 100% combustion end position in the ROHR is unclear) (FIG. 8A). This time is defined as the total combustion period Mat. Another combustibility can be determined by using the time from the MD 'to the end of the 95% combustion (FIG. 8B). This time is measured and defined as the main combustion time Mat-MD '. The flammability can be evaluated at these times. That is, the shorter the time, the better the combustibility. That is, a fuel with a long combustion time has poor combustibility.

  FIG. 13 shows the evaluation results of light oil processed for 1 hour and 2 hours using the same apparatus. Although the total combustion period Mat was 17.45 ms before the treatment, it was 17.25 ms after the 1-hour treatment and 15.90 ms after the 2-hour treatment, indicating that the flammability is improved. Further, the main combustion time Mat-MD 'is 7.76 ms, 7.94 ms, and 6.95 ms, respectively, and the effect of the processing appears. The post-burning period is shortened to 6.6 ms, 6.15 ms, and 5.3 ms.

  As described above, the treatment method of the present invention applies not only to water-based fluids (or liquids) such as waste water and sewage but also to fluids (or liquids) made of light oil, gasoline, other hydrocarbons, or other organic substances. Can be applied. Moreover, the fluid after a process has obtained favorable evaluation for each. The mechanism is not necessarily clear, but is considered to be caused by the fact that more gas components such as oxygen are retained in the fluid due to the generation of nanobubbles. Therefore, more gas components can be included by an ionization processing device such as a hydrogen peroxide generator or a stable ionization processing device.

1 is an overall block diagram of an ultrafine bubble generator to which an ultrafine bubble generation method of the present invention is applied. It is sectional drawing which shows the high voltage | pressure injector which actualized the injection means of the ultrafine bubble generator of FIG. It is the schematic which showed the ultrafine bubble generator typically. It is a schematic sectional drawing of an ionization processing apparatus. It is the schematic which showed typically another kind of ultrafine bubble generator. It is a schematic sectional drawing of a stable ionization processing apparatus. It is sectional drawing which shows another kind of high voltage | pressure injector. It is a front view which shows another kind of high voltage | pressure injector. It is (a) rear view and (b) side sectional view showing another kind of high pressure injector. It is the figure which put together the process result of the tap water processed with the ultra fine bubble generating apparatus of FIG. 1 using the high pressure injector of FIG. FIG. 11 is a graph plotting the processing results of FIG. 10. It is a figure explaining the combustibility evaluation result of a fuel. It is the figure which put together the process result of the light oil processed with the ultrafine-bubble generator of FIG. 1 using the high pressure injector of FIG.

Explanation of symbols

10 Ultrafine bubble generator 11, 60 Ultrafine bubble generator (control means omitted)
12 High-pressure pump 14 Ionization means 15 Ionization processing device 16 Injection means 18 Control means 20 Valves 28, 28 ', 128, 228 High-pressure injector 30 Main pipes 34, 35, 36, 37, 134, 135, 136 Injection nozzles 34b, 35b, 36b, 37b, 134b, 135b, 136b Injection line 40 Ceramic ball 42 Ceramic ring 50 Stable ionizer 100 Storage part 134b, 135b, 136b Injection line 200, 200 ', 220 Predetermined small area 210, 210', 230 Predetermined Area

Claims (6)

By injecting a liquid which is high-pressure body in the original fluid consisting treated Ru liquid a ultrafine bubble generation method of generating ultrafine bubbles,
A step of pressurizing the liquid which is the high-pressure body than 5 MPa,
A 3 or more Nozzle obtaining Bei length of pressurized 50mm from the high-pressure body injection port diameter and 20 liquid from 0.2 2 mm of a respective, following spheres each injection hole is 30mm are arranged in the region of the shape, and a step of injecting et al or the three or more nozzles,
The three or more injection lines formed by the ejection of the liquid is high-pressure body, passes through the small area of the sphere to 2 times the diameter length of the ejection aperture of the original fluid, either 2 When two injection lines intersect at a predetermined intersection in the predetermined small area, the direction of each of the injection lines is changed so that none of the other injection lines pass through the intersection, and the three or more The jet line has a common jet direction component, and a flow is generated in the source fluid by the jet direction component, and the method for generating ultrafine bubbles is characterized in that: 2. The method of generating ultrafine bubbles according to claim 1 , wherein the high-pressure fluid is subjected to an ionization treatment before jetting. The method for generating ultrafine bubbles according to claim 1 or 2 , wherein an ionized gas is supplied in the vicinity of a predetermined small region of the raw fluid. The method for generating ultrafine bubbles according to claim 3, wherein the ionized gas contains oxygen. The method of generating ultrafine bubbles according to any one of claims 1 to 4, wherein the raw fluid is a hydrocarbon-based liquid. The processing apparatus which performs the ultrafine bubble generation method in any one of Claim 1 to 5 .

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