WO2016178436A2 - Buse de traitement de liquide, procédé de traitement de liquide utilisant celle-ci, procédé de dissolution de gaz et dispositif de dissolution de gaz - Google Patents

Buse de traitement de liquide, procédé de traitement de liquide utilisant celle-ci, procédé de dissolution de gaz et dispositif de dissolution de gaz Download PDF

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Publication number
WO2016178436A2
WO2016178436A2 PCT/JP2016/064072 JP2016064072W WO2016178436A2 WO 2016178436 A2 WO2016178436 A2 WO 2016178436A2 JP 2016064072 W JP2016064072 W JP 2016064072W WO 2016178436 A2 WO2016178436 A2 WO 2016178436A2
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Prior art keywords
liquid
gas
water
nozzle
throttle
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PCT/JP2016/064072
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English (en)
Japanese (ja)
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WO2016178436A3 (fr
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啓雄 加藤
芝塚　全功
英弘 甲斐
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株式会社ウォーターデザイン
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Priority to JP2016565510A priority Critical patent/JP6182715B2/ja
Publication of WO2016178436A2 publication Critical patent/WO2016178436A2/fr
Publication of WO2016178436A3 publication Critical patent/WO2016178436A3/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers

Definitions

  • the present invention relates to a liquid processing nozzle, and more particularly to a liquid processing nozzle excellent in efficient generation of fine bubbles and gas dissolving ability, and also relates to a liquid processing method, a gas dissolving method and a gas dissolving apparatus realized using the nozzle. is there.
  • microbubbles fine bubbles
  • nanobubbles ultra fine bubbles
  • the two-phase flow swirl method disclosed in Patent Document 1 is intended to be refined by entraining outside air into the swirl flow and forcibly pulverizing, but the generation efficiency of nanobubbles with a bubble diameter of less than 1 ⁇ m is poor.
  • a so-called cavitation method is used in which a throttle hole is provided in the water flow path by a venturi or an orifice, and the dissolved air is precipitated as fine bubbles by the pressure reducing effect resulting from Bernoulli's theorem when water passes at a high flow rate.
  • Patent Documents 2 to 10 Various microbubble generation mechanisms have been proposed (Patent Documents 2 to 10).
  • a screw member is arranged in the middle of the throttle hole, and the water flow is further accelerated by a gap formed between the screw valleys or the opposing screw members.
  • cavitation efficiency can be improved and nanobubbles can be generated at a higher density.
  • Patent Documents 6 and 7 it is shown by bubble measurement using a laser diffraction particle size meter or the like that bubbles in the nano region are actually obtained. Further, when the water flow passes through the collision portion formed by the screw member, the water flow is vigorously stirred by the Garman vortex generated based on the flow detour and the reduced-pressure boiling phenomenon due to cavitation.
  • Patent Document 8 Japanese Patent Document 7
  • Patent Document 10 Japanese Patent Document 7
  • the mechanism of Patent Documents 2 to 5 has only one throttle hole, the flow resistance when passing through the throttle hole is increased, and the radial direction from the inner wall surface of the hole is increased. Easy to receive back pressure. As a result, the water flow rate is extremely likely to decrease.
  • Patent Document 6 when it is intended to be applied to a shower or the like, it tends to cause a lack of water feeling or cleaning power.
  • the lack of detergency is greatly related to the lack of cavitation effect and the generation of fine bubbles due to the fluid velocity accompanying the extreme reduction of the cross section. It is considered a thing.
  • the mechanism disclosed in Patent Document 6 also has only one throttle hole, and the situation is completely the same.
  • Patent Document 7 discloses a nozzle that is said to have solved the problems of Patent Documents 2 to 4, but after all, three or more screws are arranged inside the throttle hole, and the inner diameter of the throttle hole is enlarged accordingly.
  • the cause of this is that the flow branched at the joint 602 reaches the constricted portions of the nozzles 601 and 601 through long channels separated from each other. This is probably because a so-called knitting phenomenon that tends to be biased toward the nozzle 601 tends to occur.
  • the unit 600 hung in the middle of the hose has an unstable posture in the space, and one nozzle 601 is positioned slightly below the other nozzle 601. In this state, the flow tends to be biased toward the lower nozzle 601 under the influence of gravity. Further, such a knitting flow phenomenon is more likely to occur as the length of the branched flow path increases and as the section length of the throttle portion increases.
  • the total length of the branch flow path including each nozzle 601 is compared with the section length of the throttle part to which the screw is attached, in combination with the long connection part of the nozzles to the branch joint 602. , which is about 15 times longer than that, and it is considered that drift is extremely likely to occur.
  • it is necessary to sufficiently increase the fluid supply pressure so that a sufficient fluid pressure can be applied to each branch piping.
  • a booster pump is installed.
  • An object of the present invention is to provide a sufficient cavitation effect by eliminating the influence of drift by ensuring a sufficient flow rate with a relatively low fluid pressure while having a constricted portion provided with a collision portion for causing cavitation. Then, it is providing the liquid processing nozzle which can draw out the fine bubble generation
  • the throttle hole has a diameter of a circle equivalent to the sum of the axial sectional areas of the throttle holes, de and the length of the throttle hole is L, and the throttle hole aspect ratio defined by L / de is 3.5 or less.
  • the distance T from the reference point determined at the center position of the projection area of the partition wall to the inner peripheral edges of the plurality of throttle holes is the inner diameter of the throttle holes It is characterized by being arranged close to each other so as to be smaller than d.
  • the liquid processing method of the present invention is characterized in that a liquid is supplied to the liquid inlet of the liquid processing nozzle of the present invention, and the liquid is brought into contact with the collision portion and flows out from the liquid outlet.
  • the liquid flow in the nozzle body collides with the collision part and detours downstream thereof, the liquid flow is increased in speed by being squeezed in the valley, causing severe cavitation. Stir the liquid vigorously while creating bubbles.
  • a vortex generated when the high-speed flow bypasses the collision portion is added, and a very remarkable stirring region is formed in the vicinity of the collision portion and in the immediately downstream region.
  • the decompression area where the bubbles are deposited is limited to the vicinity of the valley bottom around the collision part, and the high-speed liquid flow passes through the area almost instantaneously. As a result, the fine bubbles are efficiently generated.
  • a partition portion is formed in the middle of the liquid flow path of the nozzle body, a plurality of throttle holes are provided in the partition portion, and a collision portion in which peaks and valleys are alternately formed That is, a collision portion for generating cavitation with the valley portion as a high flow velocity portion is disposed so as to protrude into each throttle hole. That is, in the unit 600 of FIG. 39, a structure in which the flow paths before and after the throttle portion are independently arranged as a plurality of nozzles is formed, a plurality of throttle portions are formed in the partition wall portion of one nozzle, and the flow path sections before and after that are formed.
  • the structure is integrated into an inflow chamber or an outflow chamber partitioned by the partition wall and shared by the plurality of throttle portions.
  • the section where the flow path branches into a plurality of systems can be shortened only to the throttle hole formed in the partition wall part, which greatly contributes to the prevention of the drift caused by the length of the branched flow path.
  • the throttle hole aspect ratio defined by L / de is 3.5 or less, or the throttle hole displacement T is smaller than the inner diameter d of the throttle hole, it is lost in the throttle hole.
  • the generation efficiency of microbubbles is not sufficient due to the decrease in the flow velocity or the drift.
  • the value of the aperture hole aspect ratio L / de is desirably 3 or less, and more desirably 2.5 or less.
  • the throttle hole displacement T is desirably 1/2 or less of the inner diameter d of the throttle hole.
  • the value of the throttle hole aspect ratio defined by L / de is a space required for arranging the collision portion.
  • the value of the throttle hole displacement T is preferably set as small as possible from the viewpoint of increasing the flow velocity in the throttle hole. For example, when two throttle holes are in contact with each other or connected at the center of the partition wall, Does not prevent it from becoming zero.
  • the throttle hole may be a hole having a uniform cross section in the flow axis direction or a hole having a non-uniform cross section that is reduced in diameter in the middle portion.
  • the axial cross-sectional area of the throttle hole means an axial cross-sectional area at a position where the value is the smallest in the flow axis direction.
  • the axial cross-sectional shape of the aperture is preferably circular, for example, an elliptical or regular polygonal shape (square, regular hexagon, regular octagon, etc.) is possible as long as no excessive loss occurs.
  • the inner diameter d of the throttle hole means the diameter of a circle having an area equivalent to the axial cross-sectional area of the throttle hole defined in Definition 1.
  • the plurality of throttle holes may have different axial cross-sectional areas, but in this case, the inner diameter d of the throttle hole means an average value for the plurality of throttle holes.
  • the center position of the projection region of the partition wall means the center when the projection region is circular.
  • the projected area of the partition wall is allowed to be a regular polygonal shape or an elliptical shape from the concept of the invention. In this case, the geometric gravity center position of the projected area is determined as the center position.
  • Patent Document 11 does not have a collision portion in the throttle hole in the first place, so that good cavitation characteristics cannot be obtained.
  • two rows of aperture holes are formed in the circumferential direction so as to surround the center point, and the aspect ratio cannot be calculated because the number of aperture holes cannot be specified in the drawing, but FIG.
  • the displacement of all the throttle holes including those on the outer peripheral side as well as those on the outer peripheral side is clearly larger than the inner diameter (venturi throttle position), which is also outside the scope of the present invention. Therefore, it is clear that the effect of the present invention cannot be achieved even if a collision portion is added to the aperture of the nozzle of Patent Document 11.
  • the collision part is formed with a screw member whose leg end side protrudes into the flow path
  • the thread formed on the outer peripheral surface of the leg part of the screw member can be used as a peak part, and manufactured. Is easy.
  • the number of throttle holes formed in the core part is 2 to 4, and the total cross-sectional area of the throttle liquid circulation part is 13 mm. 2 25mm or more 2
  • the flow rate is as follows, it is possible to obtain 7 L / min or more and 20 L / min or less at a flow rate measured by opening the liquid outlet when water is circulated to the liquid inlet so that the dynamic pressure is 0.1 MPa. It becomes.
  • the collision part has a nominal diameter of M1.2 or more and M2.0 or less (preferably , M1.2 or more and M1.6 or less).
  • the throttle hole is disposed near the center of the partition wall (around the reference point) as follows. That is, in the projection onto the plane orthogonal to the axis of the nozzle body, when St is the area of the circumscribed circle with respect to the inner periphery of the plurality of throttle holes and Sr is the total area of the projection areas of the throttle holes, K ⁇ Sr / St
  • the aperture hole aggregation rate K defined as follows is 0.2 or more. For example, in the case of a set of a plurality of throttle holes having the same size and the same number of formations, the circumscribed circle area increases as the throttle hole displacement T increases.
  • the throttle hole concentration ratio K can be a parameter representing the concentration degree of the throttle holes in the central region of the partition wall, and by setting the K to 0.2 or more, the drift suppression effect becomes more remarkable, and the generation of fine bubbles Contributes to further improvement in efficiency and gas dissolution efficiency.
  • the aperture hole concentration ratio K that can be read from the drawing is 0.11.
  • the “circumscribed circle” is defined as a circle circumscribing all of the inner peripheral edges of the plurality of aperture holes (minimum diameter portions) in the projection.
  • the area St of the circumscribed circle is desirably 90% or more of the projected area of the partition wall.
  • the projected area of the partition wall is set to 90% or more, and the inner peripheral surface of the inflow chamber following the liquid inlet is defined as the partition wall. It is effective to use a tapered surface that decreases in diameter toward the surface.
  • the area St of the circumscribed circle can be made equal to the projected area of the partition wall.
  • the collision part By disposing the collision part in a cross shape, the number of troughs in the throttle hole that becomes a high flow rate part (cavitation point) can be increased.
  • the liquid circulation gap is formed at the center position of the cross, the flow at the center of the cross section (central flow), which has the highest flow velocity, is less likely to be hindered by the formation of the liquid circulation gap.
  • the flux toward the located valley is less likely to be disturbed by the collision and detour of the central flow.
  • the above-mentioned effect due to the formation of the liquid flow gap is particularly remarkable when the front end surface forming the liquid flow gaps of the four collision parts is formed flat and the liquid flow gap is formed in a square shape in the above-described projection. is there.
  • a set of cross-shaped collision portions formed in the respective restriction holes can be easily formed by four screw members that are screwed so that the tip protrudes into the restriction hole from the wall outer peripheral surface side of the nozzle body.
  • you try to screw as many as four screw members from the outside of the nozzle body into each of a plurality of throttle holes mistaken geometrical layout may cause interference between the screws, or to a certain throttle hole. There is a problem that the screwed screw member penetrates through another throttle hole.
  • the throttle hole is formed in the central region of the partition wall part without causing such a problem. It is understood that it is optimal to form the constricted holes in the processing core part with any of two to four in a symmetrical relationship with respect to the central axis of the liquid flow channel as the structure formed close to each other. It was. In order to avoid the interference of the above-described screw members, it is appropriate that the set of four screw members incorporated in each throttle hole is disposed at a position shifted from each other in the axial direction between the throttle holes.
  • the number of throttle holes arranged in this case is preferably 2 to 3, and is optimally 2 in consideration of the ease of nozzle fabrication. It is also possible to arrange a plurality of collision parts in the same throttle hole at positions shifted from each other in the axial direction (flow direction) of the throttle hole. In this way, a plurality of collision parts can be provided in the flow direction, and the flow can be repeatedly brought into contact with the valleys serving as cavitation points. This contributes to further improvement in the generation efficiency of fine bubbles and the gas dissolution efficiency described later.
  • the gas dissolving method of the present invention is characterized in that a mixed phase flow of liquid and gas is supplied to the collision portion of the liquid processing nozzle of the present invention, and the gas is discharged from the liquid outlet in a state of being dissolved in the liquid.
  • the gas dissolving apparatus of the present invention includes the liquid processing nozzle of the present invention, and a multiphase flow supply means for supplying a multiphase flow of liquid and gas to a collision portion of the liquid processing nozzle, and converts the gas into a liquid. It is characterized by being allowed to flow out from the liquid outlet in a dissolved state.
  • Bubbles generated by cavitation do not grow so much and are caught in the strong stirring region, and fine bubbles are efficiently generated.
  • a gas is positively introduced from the outside into the liquid to be supplied and supplied to the processing core as a mixed phase flow of the liquid and the gas, the gas forming the mixed phase is caught in the strong stirring region downstream of the collision portion.
  • mixing with the liquid proceeds remarkably, and gas dissolution can be performed very efficiently.
  • one of the major factors for the formation of a strong stirring region in the downstream region of the collision part is the gas dissolved in the liquid to be supplied (Note: the gas introduced from the outside to create a multiphase flow, (It may also include those once dissolved).
  • the stirring / dissolution of the gas introduced from the outside proceeds on a scale exceeding the amount of gas impaired by the boiling under reduced pressure.
  • the gas that could not be dissolved in the liquid remains in the liquid as microbubbles with a very low ascending speed, and various known effects peculiar to microbubbles (for example, cleaning effect, liquid permeability promoting effect, etc.)
  • various known effects peculiar to microbubbles for example, cleaning effect, liquid permeability promoting effect, etc.
  • the above-mentioned drift suppression effect in the liquid processing nozzle of the present invention exhibits a greater technical significance when it is used for gas dissolution as described above.
  • the throttle hole disclosed in the above-mentioned patent document supplies a multiphase flow to a single nozzle, the supply volume ratio of gas to liquid cannot be taken so large, and as a result, the amount of dissolved gas Must be lowered. This is because, when the gas supply volume ratio becomes excessive, contact with the gas phase becomes dominant when the multiphase flow passes through the collision part, so that the flow around the collision part is held up by excess gas.
  • the throttle hole aspect ratio formed in the partition wall is set to 3.5 or less, and the vicinity of the center of the partition wall (reference) so that the throttle hole displacement is smaller than the inner diameter d of the throttle hole.
  • the gas phase drift is effectively suppressed and the collision part hold-up due to the gas phase drift concentration is less likely to occur, and the gas dissolution efficiency (or microbubble generation efficiency) is improved. It can be dramatically improved.
  • setting the length Lp of the remaining section located downstream from the collision portion of the throttle hole so that the above-mentioned remaining section aspect ratio is 1.0 or less is more effective in gas dissolution. Become. That is, even if the gas phase is slightly biased to some throttle holes, the remaining section length Lp is small, so that a remaining throttle hole where the gas phase does not concentrate is formed downstream of the collision portion. It is possible to quickly lead to a strong stirring region.
  • the strong stirring region of another throttle hole having a healthy cavitation effect is generated in the outflow chamber. Since it can be shared, more efficient gas dissolution and pulverization becomes possible.
  • the inner peripheral surface of the outflow chamber as a tapered surface that expands toward the liquid outlet, the strong stirring region formed by the individual throttle holes can be smoothly combined without loss in the outflow chamber. Can do.
  • the remaining section Lp of the throttle hole is desirably as small as possible in order to more efficiently combine the strong stirring regions of the individual throttle holes in the outflow chamber, and therefore the remaining section aspect ratio Lp / de is desirably as small as possible. Ideally it should be zero.
  • a method of supplying a multiphase flow to the collision part of the liquid processing nozzle a method of allowing gas to flow upstream from the collision part into the throttle hole of the liquid processing nozzle can be adopted.
  • the gas to be dissolved can be sucked in at a relatively low pressure due to the vacuum suction effect due to the venturi effect in the throttle hole, and the gas bubbles introduced from the gas supply near the collision part
  • a gas introduction hole that opens to the outer peripheral surface of the nozzle body and communicates with the throttle hole upstream of at least one of the plurality of collision portions is provided in the nozzle body. The formed one can be used. If a gas supply pipe is connected to the inlet of the gas introduction hole on the outer peripheral surface side of the nozzle, the gas to be dissolved can be easily introduced into the throttle hole.
  • the multiphase flow supply means of the gas dissolving device of the present invention is configured to include a liquid supply unit that supplies liquid to the liquid inlet of the liquid processing nozzle and a gas supply unit that supplies gas to the gas introduction hole.
  • the gas introduction holes may be formed in all of the plurality of throttle holes, and the gas may be distributed and supplied to all the throttle holes. ) Only. In the latter configuration, the gas is biased and supplied to the throttle hole provided with the gas introduction hole, but since the liquid is supplied to the remaining throttle hole at a sufficient flow rate, the gas was introduced from the gas introduction hole. The gas can be sufficiently dissolved and pulverized in the outflow chamber where the strong stirring regions from the respective throttle holes are united.
  • the multiphase flow supply means of the gas dissolving apparatus of the present invention includes a liquid supply unit that supplies liquid to the liquid inlet of the liquid processing nozzle, and a gas that includes a gas supply nozzle independent of the nozzle body connected to the liquid inlet. What is necessary is just to comprise as a thing provided with a supply part. Since the gas dissolution method of the present invention is excellent in gas dissolution efficiency, the simplest method is to dissolve the gas while flowing the liquid through the liquid processing nozzle for only one pass.
  • the multiphase flow supply means (specifically, the liquid supply unit) of the gas dissolving apparatus of the present invention includes a liquid supply pipe connection unit for connecting a liquid supply pipe connected to an external liquid supply source, From the liquid outlet of the liquid processing nozzle, the gas-dissolved liquid obtained by dissolving the gas in one pass by the liquid processing nozzle is allowed to flow out, and a gas-dissolved liquid discharge pipe is connected to the liquid outlet side.
  • a liquid discharge pipe connecting portion for the above may be provided.
  • the multiphase flow supply means (specifically, the liquid supply unit) of the gas dissolving apparatus includes a circulation pipe that returns from the liquid storage part that stores the liquid to the liquid storage part via the liquid processing nozzle, and the circulation pipe.
  • a liquid feed pump that circulates and feeds the liquid in the liquid storage part in a form that circulates the liquid processing nozzle while mixing with the gas from the gas supply part and then returns to the liquid storage part can be provided.
  • the type of the liquid in which the gas is dissolved is not particularly limited.
  • water including an aqueous solution and a colloidal solution containing water as a solvent
  • it can.
  • it is an organic liquid such as alcohol (and a diluted product thereof) and fossil fuel (gasoline, light oil, heavy oil, etc.).
  • the type of gas to be dissolved is not limited in the same manner, but may be, for example, oxygen, nitrogen, carbon dioxide, hydrogen, ozone, chlorine, argon, helium, etc., and may be two or more mixed gases selected from them. .
  • the mixed phase flow supply means of the gas dissolving apparatus of the present invention is configured to supply a mixed phase flow of carbon dioxide gas and water.
  • Carbon dioxide has a very high solubility in water, and the saturation solubility at 1 atm (normal pressure: 0.1 MPa) in the case of 20 ° C. water reaches 1800 ppm.
  • carbon dioxide gas exceeding 30% of the volume of water must be dissolved at room temperature.
  • a gas dissolution unit using a carbon dioxide separation membrane is very expensive and has a short life.
  • the dissolution efficiency of carbon dioxide gas is low, and it is very difficult to dissolve carbon dioxide gas exceeding 30% of the volume flow rate of water in one pass.
  • the liquid treatment nozzle of the present invention can easily supply even a single pass with a water pressure of about 0.1 MPa or a carbon dioxide gas of about 30% of the volume of water simply by supplying a mixed phase flow of carbon dioxide and water to the nozzle. Demonstrate the ability to dissolve.
  • the liquid processing nozzle of the present invention is defined by K ⁇ Sr / St, where St is the area of the circumscribed circle with respect to the inner peripheral edge of the plurality of apertures and Sr is the total area of the projection areas of the apertures in the above projection.
  • K the squeezed hole concentration ratio
  • K the water flowing out from the liquid outlet when the liquid outlet side is opened and water is circulated to the liquid inlet so that the dynamic pressure is 0.1 MPa.
  • the water flux Q / Se is 0.5 L ⁇ mm, where Q is the flow rate, and Se is the total cross-sectional area of the processing core portion of the throttle liquid circulation portion formed between the inner surface of the throttle hole and the collision portion.
  • the liquid processing nozzle of the present invention configured as described above is referred to as a “standard configuration liquid processing nozzle”.
  • the flow rate of carbon dioxide gas for forming a multiphase flow is Q1, and the flow rate of water is Q2.
  • the dynamic water pressure on the liquid inlet side is 0.015 MPa or more and 0.3 MPa or less, and the carbon dioxide gas / water flow rate ratio Q1 / Q2 is 0.1 or more and 1.3 or less (however, the gas flow rate is converted to a pressure of 0.1 MPa). If water and carbon dioxide gas are supplied to the liquid treatment nozzle in one pass or circulating as a volume flow rate (hereinafter the same), the carbon dioxide gas can be dissolved in water at a dissolution efficiency of 50% or more.
  • the dynamic water pressure at a high pressure exceeding 0.3 MPa, and naturally a dissolution efficiency of 50% or more can be achieved, but such a high dissolution efficiency can be realized even at a low water pressure of 0.3 MPa or less.
  • the liquid treatment nozzle of the present invention dares. Even when only one path of the water / carbon dioxide mixed phase flow is supplied to the liquid treatment nozzle, the dissolved carbon dioxide concentration obtained on the liquid outlet side can be obtained by setting the carbon dioxide / water flow ratio Q1 / Q2 to 0.6 or more. Can be 600 ppm or more.
  • the pH value of the sodium hypochlorite aqueous solution is stably maintained in the pH range of 4.3 to 6 where the disinfection effect is optimized. can do.
  • carbon dioxide gas may be dissolved in normal water by the method of the present invention, and a sodium hypochlorite aqueous solution may be added later. In this way, the chemical resistance required especially for the material of the collision part of the liquid processing nozzle can be greatly reduced.
  • the gas dissolving apparatus of the present invention is provided with a sodium hypochlorite aqueous solution supply unit for quantitatively supplying a sodium hypochlorite aqueous solution to the water in which the carbon dioxide gas delivered from the liquid processing nozzle is dissolved.
  • a sodium hypochlorite aqueous solution supply unit for quantitatively supplying a sodium hypochlorite aqueous solution to the water in which the carbon dioxide gas delivered from the liquid processing nozzle is dissolved.
  • the multiphase flow supply means of the gas dissolving apparatus of the present invention is configured to supply a multiphase flow of nitrogen and water.
  • water is deoxygenated in order to prevent corrosion of boilers and piping caused by dissolved oxygen in the water, and one method is nitrogen.
  • the nitrogen-type deoxygenation device removes dissolved oxygen in the raw water by replacing the raw water with nitrogen gas, that is, by dissolving the nitrogen gas.
  • the nitrogen gas has a higher melting efficiency, thereby reducing the nitrogen gas flow rate and the circulation time.
  • the oxygen concentration of raw water can be reduced.
  • the nitrogen-dissolved water is brought into contact with the atmosphere again, the re-dissolution of oxygen in the atmosphere starts immediately. Therefore, when the conventional method is used to dissolve and deoxygenate nitrogen, the rate of increase in dissolved oxygen concentration is quite fast. .
  • the introduced nitrogen is contained not only in a dissolved state but also in the form of fine bubbles having a bubble diameter of 1 ⁇ m or less, and the dissolution of nitrogen from the bubbles is caused by oxygen from the atmosphere.
  • the low dissolved oxygen concentration state can be maintained for a long time.
  • the dynamic water pressure on the liquid inlet side is 0.015 MPa or more and 0.3 MPa or less when the nitrogen flow rate for forming the multiphase flow having the above configuration is Q1 and the water flow rate is Q2.
  • the dissolved oxygen concentration of water can be reduced to 1 ppm or less by supplying the nitrogen / water flow rate ratio Q1 / Q2 to 0.1 or more and 0.3 or less and supplying the liquid treatment nozzle in one pass or circulating supply.
  • the number of passes for circulating supply means that the pump liquid flow rate is QP (L / min), the circulation time is T (min), and the water volume in the tank is V (L).
  • the multiphase flow supply means of the gas dissolving apparatus of the present invention is configured to supply a multiphase flow of oxygen and water.
  • the gas dissolution method of the present invention In fish breeding tanks, ginger for curing live fish (including shellfish), or agricultural water (especially water for hydroponic cultivation), fish and plants consume dissolved oxygen in the water, resulting in oxygen constancy Replenishment is necessary, and the amount of oxygen consumed unnecessarily by the rise of coarse bubbles is large.
  • the gas dissolution method of the present invention When the gas dissolution method of the present invention is used, the oxygen gas dissolution efficiency becomes higher compared to the conventional method using a venturi tube ejector, a static mixer, etc., thereby reducing the oxygen gas flow rate and the circulation time.
  • the dissolved oxygen concentration of the raw water can be significantly increased or maintained.
  • the gas to be used pure oxygen may be used, or a mixed gas of nitrogen and oxygen such as air may be used.
  • the dissolved oxygen concentration of the resulting water can be made higher than the atmospheric equilibrium dissolved concentration (about 8 ppm) at room temperature and normal pressure.
  • dissolved oxygen concentration level can be improved by dissolving air.
  • water in which oxygen is dissolved at a concentration higher than the atmospheric equilibrium dissolved concentration is brought into contact with the atmosphere again, the evaporation of oxygen proceeds until the concentration decreases to the atmospheric equilibrium dissolved concentration.
  • fish or shellfish are bred or cured in water, oxygen is consumed by these fish and shellfish and the oxygen concentration decreases more rapidly. In these cases, when oxygen is dissolved by the conventional method, the rate of decrease in the dissolved oxygen concentration is considerably fast.
  • the dynamic water pressure on the liquid inlet side is 0.015 MPa or more and 0.3 MPa when the oxygen flow rate for forming the multiphase flow having the above configuration is Q1 and the water flow rate is Q2.
  • the oxygen / water flow ratio Q1 / Q2 is set to 0.1 or more and 0.3 or less, and the dissolved oxygen concentration of water can be set to 10 ppm or more and 40 ppm or less by supplying the liquid treatment nozzle in one pass or circulation.
  • the fourth case is when hydrogen is dissolved.
  • the multiphase flow supply means of the gas dissolving apparatus of the present invention is configured to supply a multiphase flow of hydrogen and water.
  • Dissolved hydrogen in water exhibits remarkable reducibility, exhibits an antioxidant effect and an inactivating effect of active oxidative species, and there are many products that are presumed to be taken into the body by drinking or ingestion.
  • hydrogen not only has a low saturation solubility in water, but also has the lowest specific gravity among all gases, so the re-evaporation of dissolved hydrogen is significant, so that high-concentration hydrogen water can be obtained. It has been considered that a pressure dissolution process is essential.
  • the gas dissolution method of the present invention when used, high-concentration hydrogen water can be obtained very simply by passing the liquid treatment nozzle as a mixed phase flow of water and hydrogen without performing pressurization. .
  • the dynamic water pressure on the liquid inlet side is 0.015 MPa or more and 0.3 MPa when the hydrogen flow rate for forming the multiphase flow having the above-described configuration is Q1 and the water flow rate is Q2.
  • the hydrogen / water flow ratio Q1 / Q2 is set to 0.1 or more and 0.3 or less, and the dissolved hydrogen concentration of water is set to 0.3 ppm or more and 1.8 ppm or less by supplying the liquid treatment nozzle in one pass or circulation. Can do.
  • FIG. 1 is a view showing a transverse section showing an embodiment of the liquid processing nozzle of the present invention together with an enlarged view of arrow A.
  • FIG. FIG. 2 is a cross-sectional view showing details of a processing core portion of the liquid processing nozzle of FIG.
  • FIG. 3 is an enlarged view substantially showing an arrangement form of the screw members serving as the collision portions in one throttle hole of FIG.
  • FIG. 4 is an enlarged view showing a modification of FIG.
  • FIG. 5 is an enlarged view of the arrangement in the flow axis direction of the screw member in the processing core portion of FIG.
  • FIG. 6 is a diagram showing a modified arrangement example of FIG.
  • FIG. 7 is an explanatory diagram of the action of the peaks and valleys in the collision part.
  • FIG. 8 is a plan view showing the operation of the collision portion.
  • FIG. 9 is an operation explanatory diagram of a liquid processing method using the liquid processing nozzle of FIG.
  • FIG. 10 is an explanatory diagram of the operation of the liquid processing method using the nozzles of the comparative example.
  • FIG. 11 is a diagram showing an embodiment in which a plurality of throttle holes are partially overlapped and integrated in the processing core portion.
  • FIG. 12 is a view showing a modification in which four screw members of each throttle hole of the liquid processing nozzle of FIG. 1 are arranged on the same plane.
  • FIG. 13 is a schematic diagram illustrating an example in which three throttle holes are formed in the processing core portion.
  • FIG. 14 is a view showing a modification in the case where the collision portion and the nozzle body are integrally formed by injection molding.
  • FIG. 15 is a diagram showing a modification in which four throttle holes are provided and only one screw member serving as a collision portion is disposed in each throttle hole.
  • FIG. 16 is a view showing a modification of the arrangement of the screw members in the processing core portion of FIG.
  • FIG. 17 is a diagram illustrating an example in which no crest is formed on the entire circumference of the collision portion.
  • FIG. 18 is a schematic view showing an example in which the liquid processing nozzle of the present invention is incorporated in the middle of a shower hose.
  • FIG. 19 is a schematic view showing an example in which the liquid treatment nozzle of the present invention is used for toilet flushing of a toilet.
  • FIG. 20 is a diagram illustrating an example of a liquid processing nozzle provided with a gas introduction hole.
  • FIG. 21 is a diagram illustrating a state in which joints are connected to both ends of the nozzle of FIG. 20.
  • FIG. 22 is an operation explanatory view of a gas dissolving method using the liquid processing nozzle of the present invention.
  • FIG. 23 is a view showing a modification in which the gas introduction hole is omitted from the liquid processing nozzle of FIG.
  • FIG. 24 is an explanatory view of the operation when the gas dissolving method of the present invention is carried out by introducing the gas upstream of the nozzle using the nozzle of FIG.
  • FIG. 25 is another explanatory diagram of the operation.
  • FIG. 26 is a cross-sectional view showing an example of a gas dissolving apparatus using the liquid processing nozzle of FIG. FIG.
  • FIG. 27 is a schematic view showing an example of a method of using the gas dissolving apparatus of FIG.
  • FIG. 28 is a cross-sectional view showing an example of a gas dissolving apparatus using the liquid processing nozzle of FIG.
  • FIG. 29 is a schematic diagram showing an example of a gas dissolving apparatus in which the liquid processing nozzle of FIG. 1 is used to perform hydrogen dissolution in one pass.
  • 30 is a cross-sectional view showing an example in which a liquid feed pump is incorporated in the gas dissolving apparatus of FIG.
  • FIG. 31 is a schematic view showing an example of a method of using the gas dissolving apparatus of FIG.
  • FIG. 32 is a schematic view showing an example of an apparatus in which the liquid treatment nozzle of FIG. 1 is used to perform gas dissolution while pumping liquid.
  • FIG. 33 is a schematic diagram showing an example in which the apparatus of FIG. 32 is modified so that ozone can be dissolved.
  • FIG. 34 is a cross-sectional view showing an example in which a mechanism capable of quantitatively supplying a sodium hypochlorite aqueous solution is added to the gas dissolving apparatus of FIG.
  • FIG. 35 is a first graph showing the result of carbon dioxide dissolution in Example 2.
  • FIG. 36 is also a second graph.
  • FIG. 37 is a first graph showing the results of hydrogen gas dissolution in Example 2.
  • FIG. 38 is also a second graph.
  • FIG. 39 is a diagram illustrating an example of a conventional liquid processing nozzle unit.
  • FIG. 40 is a diagram illustrating an example of a conventional liquid processing nozzle.
  • FIG. 1 shows a cross section of a liquid processing nozzle that constitutes an embodiment of the present invention, along with an enlarged side surface from the liquid inlet side axial direction (see arrow A).
  • the liquid processing nozzle 1 includes a nozzle body 2 in which a liquid channel 3 is formed.
  • the nozzle body 2 is formed in a cylindrical shape, and a liquid passage having a circular cross section is formed in the direction of the central axis O thereof.
  • the nozzle body 2 includes a partition wall 8 that divides the liquid flow path 3 into an inflow chamber 6 on the liquid inlet 4 side and an outflow chamber 7 on the liquid outlet 5 side, and an inflow chamber 6 and an outflow chamber formed through the partition wall 8.
  • a processing core portion CORE is formed that includes a plurality of throttle holes 9 that communicate with each other through different paths and a collision portion 10 that protrudes from the inner surface of the throttle hole 9.
  • two throttle holes 2 having the same inner diameter are formed in the partition wall portion 8 so as to be axially oriented with respect to the central axis O.
  • the collision portion 10 is formed so that a plurality of circumferential ridges 11 and troughs 12 serving as high flow velocity portions are alternately arranged on the outer peripheral surface.
  • the collision part 10 is a screw member (hereinafter, also referred to as “screw member 10”) whose leg end side protrudes into the flow path, and as a result, a plurality of ridges 11 formed in the collision part.
  • screw member 10 a screw member
  • a peak part and a trough part may be closely integrated in the axial direction of a collision part, without integrating in a spiral shape and closing in the circumferential direction.
  • the crests and troughs do not necessarily have to be formed all around in the circumferential direction of the collision part, and as shown in FIG. 17, downstream of the flow direction (white arrow) that does not easily function as a cavitation point.
  • the peak portion 12 and the valley portion 10 may be cut out in a partial section in the circumferential direction.
  • the material of the nozzle body 2 is, for example, a resin such as ABS, nylon, polycarbonate, polyacetal, or PTFE, but may be a metal such as stainless steel or brass, or a ceramic such as alumina. Selected.
  • the material of the screw member 10 is stainless steel, for example, a heat-resistant alloy such as titanium, hastelloy, or Inconel (both are trade names) with higher corrosion resistance may be used depending on the application, When corrosion resistance or the like becomes a problem, a ceramic material such as quartz or alumina can be used. In particular, it is preferable to use quartz for application to a field that dislikes metal contamination (for example, the semiconductor field), and the nozzle body 2 made of resin is preferably made of PTFE, for example.
  • each impingement portion 10 is arranged in each of the plurality of restricting holes 9 in the processing core portion CORE in a cross shape surrounding the central axis of each restricting hole 9 in projection onto a plane orthogonal to the axis O of the nozzle body 2. ing.
  • a liquid circulation gap 15 is formed at the center position of the cross formed by the four collision portions 10.
  • the front end surfaces of the four collision portions 10 forming the liquid flow gap 15 are formed flat, and the liquid flow gap 15 is formed in a square shape in the above-described projection.
  • the tip portion 10t of the screw member 10 may be formed in a conical shape, and in this case, the liquid flow gap 15 is formed in a cross shape.
  • each throttle hole 9 is four screw members 10 that are screwed so that the tip protrudes into the throttle hole 9 from the wall outer peripheral surface side of the nozzle body 2.
  • the screw member 10 is screwed into a screw hole 19 penetratingly formed in the wall portion of the nozzle main body 2, and each screw hole 19 is positioned in the middle of the screw thrust direction.
  • a stepped surface 19r for supporting the lower surface of the screw head is formed. The formation position of the stepped surface 19r is such that when the screw member 10 is screwed in, the length of the screw leg portion protruding into the throttle hole 9 (that is, the portion serving as the collision portion) forms the liquid flow gap 15.
  • the setting between the screw hole 19 and the screw member 10 is fixed by an adhesive or the like.
  • the cylindrical cover 18 which covers the outer peripheral surface of the nozzle main body 2 is attached by adhesion etc. in order to conceal this.
  • the outer peripheral surface of the cover member 18 may be decorated by plating or painting.
  • an inflow side connection portion 16 and an outflow side connection portion 17 are formed on the outer peripheral surfaces of both ends of the nozzle body 2. Further, as shown in FIG. 2, in order to avoid interference of the screw members 10 between the plurality of throttle holes 9, a set of four screw members 10 incorporated in each throttle hole 9 is arranged between the throttle holes 9.
  • the plurality of screw members 10 ⁇ / b> A, 10 ⁇ / b> B, 10 ⁇ / b> C, 10 ⁇ / b> D in the same throttle hole 9 are arranged at positions shifted from each other in the axial direction (flow direction) of the throttle hole 9. .
  • screw member pairs 10A, 10B and 10C, 10D arranged at positions orthogonal to each other on the same plane are different from each other in the flow direction (in FIG.
  • the holes 9 are arranged at positions A and B on the downstream side, and the positions of the lower throttle holes are arranged at positions C and D on the upstream side.
  • each pair of screw members 10 is in contact with the outer peripheral edge of the front end surface (or in a form in which the outer peripheral edges of the front end surface are close to each other through a gap narrower than the liquid flow gap), and another pair of screws.
  • a square liquid flow gap is formed together with the member 10.
  • FIG. 16 shows a modification according to the arrangement of each screw member pair.
  • the leg end 10b of one screw member is positioned at the center of the throttle hole 9, while the other screw is provided on the peripheral side surface of the leg end 10b.
  • the tip end face 10e of the member is brought into contact (or opposed through a gap), and the leg end edge 10b on the side located in the center of the throttle hole 9 is placed between the pair in the axial direction of the nozzle body 2 (FIG. 1).
  • the value of the aperture hole aspect ratio L / de is desirably 3 or less, and more desirably 2.5 or less.
  • the distance from the reference point O determined at the center position of the projection area of the partition wall 8 to the inner periphery of the plurality of aperture holes 9 (the aperture The plurality of throttle holes 9 are arranged close to each other around the reference point O so that (hole displacement) T is smaller than the inner diameter d of the throttle hole 9.
  • the throttle hole displacement T is desirably 1/2 or less of the inner diameter d of the throttle hole 9.
  • the flow rate of water flowing out from the liquid outlet 5 is Q, and the inner surface of the throttle hole 9
  • the water flux Q / when the total cross-sectional area in the processing core part CORE of the liquid circulation area (see FIG. 3: including the main circulation area 21 and the liquid circulation gap 15) formed between the collision part 10 is Se. Se 0.5L ⁇ mm 2 / Min or more can be secured. Further, the area St of the circumscribed circle 20 is 90% or more (100% in FIG. 1) of the projected area of the partition wall 8.
  • the remaining section aspect ratio defined by Lp / de is set to 1.0 or less, where de is the diameter of the circle equivalent to the total area.
  • the inner peripheral surface of the outflow chamber 7 is also a tapered surface 14 that expands toward the liquid outlet 5.
  • the length of the remaining section is zero with respect to the screw member 10A located on the most downstream side, but as shown in FIG. 6, when the remaining section has a non-zero length Lp1 with respect to the screw member 10A,
  • the remaining section length Lp is an average value of Lp1 to Lp4.
  • the throttle holes 9 are arranged close to the reference point O so that the throttle hole displacement T (see FIG. 1) is smaller than the inner diameter d of the throttle hole 9. It is gathered at the center of the partition wall portion 8 which becomes the flow velocity. As a result, a decrease in flow velocity or non-uniformity in the throttle hole 9 is suppressed, and drift can be reliably prevented. That is, it is possible to achieve both a sufficient cavitation effect and a sufficient flow rate by forming a plurality of throttle holes 9 having the collision portion 10, and the drift between the plurality of throttle holes 9 is effectively suppressed, The generation of fine bubbles based on the cavitation effect can be continued stably. Furthermore, in the liquid processing nozzle of FIG. 1, the remaining section aspect ratio (see FIG.
  • the plurality of throttle holes 9 may be integrally formed so as to partially overlap in a region including the center of the partition wall portion 8 in the above-described projection. It is desirable that the projected area of the overlap region be within 30% of the area of each aperture 9.
  • FIG. 15 shows an example in which four throttle holes 9 are formed in the partition wall portion 8.
  • Each of the four throttle holes 9 has a collision portion formed by screwing one screw member 10 in the diameter direction.
  • the four throttle holes 9 are arranged at positions that form the vertices of squares in the above-described projection, and the central axis O of the nozzle body 2 from the outer peripheral surface side of the nozzle body 2 to each throttle hole 9.
  • the screw member 9 is screwed in the diameter direction of the throttle hole 9 toward.
  • the screw member 10 may be incorporated into the nozzle body 2 by insert molding, and the collision portion may be integrated with the nozzle body 2 by injection molding, as in FIG.
  • usage examples of the liquid processing nozzle of the present invention that is, embodiments of the liquid processing method
  • FIG. 18 shows a case where the liquid treatment nozzle of FIG.
  • Connection thread portions hereinafter referred to as reference numeral 17 are formed respectively.
  • Each screw portion 16 and 17 is formed as a male screw portion (for example, R1 / 2 to G1 / 2), and the hoses 402 and 405 are connected to the shower head 401, the faucet fittings 403, 404, 406, and 407, respectively.
  • the liquid processing nozzle 1 and the hot / cold water mixing tap 408 are connected. If the hot and cold mixing tap 408 is opened in this state, hot water is supplied to the liquid nozzle 1 and sprayed from the shower head 401. Even when using an existing shower head that does not have the function of generating bubbles, a large amount of fine bubbles can be mixed into the hot water when passing through the liquid processing nozzle 1, increasing the water permeability to the human skin and hair and keeping the moisture.
  • the toilet 105 and the sewage drain pipes 107 and 108 of the toilet 105 are washed. Thereby, the toilet bowl 105 and the sewage drain pipes 107 and 108 can be kept clean for a long period of time, and adhesion and accumulation of urinary stones and the like are less likely to occur.
  • the toilet bowl 105 is configured as a urinal, and a known valve unit 104 with a sensor is provided at a position where the user of the toilet bowl 105 can be detected on the way of the washing water supply pipe 103. Clean water from the water pipe 102 is stored in a wash water tank 101 provided above, and a supply pipe 103 is connected to the wash water tank 101.
  • the sensor-equipped valve unit 104 transitions from the standby state to the cleaning preparation state when the detection state of the user approaching the toilet 105 is continued for a predetermined time or more.
  • the cleaning preparation state as the user moves away from the toilet bowl 105 and enters a non-detection state, the valve is opened and a necessary amount of washing water is allowed to flow into the toilet bowl 105, and then the valve is closed again to wait for washing.
  • the wastewater from the toilet is collected in the sewage pipe 108 and discharged to the sewer or septic tank.
  • the liquid processing nozzle 71 is formed by forming a gas introduction hole 28 in the nozzle body 2 that opens to the outer peripheral surface of the nozzle body 2 and communicates with the throttle holes 9 upstream of the plurality of collision portions 10.
  • a gas introduction hole 28 in each throttle hole 9, the pair of screw members 10 arranged at positions orthogonal to each other on the same plane are different from each other in the flow direction (see FIG. 20).
  • the middle and upper throttle holes 9 are arranged at positions A and B on the downstream side, and the lower throttle holes are arranged at positions C and D on the upstream side.
  • the gas introduction hole 28 is located on the upper side of the drawing with respect to the nozzle hole 9 where the screw member 10 is attached to the position A or B on the downstream side of the position of the most downstream screw member 10A.
  • a hole is formed in the radial direction with respect to the wall portion of the nozzle body 2 so as to open to the upstream side.
  • a female screw hole 29 for attaching a gas introduction joint 30 for connecting a gas supply pipe is formed in the opening of the gas introduction hole 28 on the outer peripheral surface side of the nozzle body 2.
  • the gas introduction hole 28 is opened upstream of any of the screw member pairs 10 ⁇ / b> A and 10 ⁇ / b> B.
  • the inflow side connection portion 26 and the outflow side connection portion 27 are connected to the gas introduction joint 30, and the axial direction intermediate portion is larger in diameter than the inflow side connection portion 26 and the outflow side connection portion 27. It is said that.
  • the one-touch fitting 202 on the liquid inflow side is connected to a liquid supply means such as a pump or a liquid supply pipe connected to a water supply, and plays a role as a liquid supply unit together with an external liquid supply means. Therefore, the one-touch pipe joint 202 and the gas introduction joint 30 constitute a multiphase flow supply means of the gas dissolving apparatus of the present invention. As shown in FIG.
  • the liquid processing nozzle 71 also has the throttle hole aspect ratio formed in the partition wall portion 8 set to 3.5 or less, and the displacement of the throttle hole 9 is smaller than the inner diameter d of the throttle hole 9. As described above, they are arranged close to each other near the center of the partition wall 8 (around the reference point).
  • the length Lp of the remaining section located downstream from the collision portion 10 of the throttle hole 9 is set so that the aforementioned remaining section aspect ratio is 1.0 or less.
  • the gas introduction hole 28 is formed only in one of the two throttle holes 9, 9, the gas phase GB to be dissolved is biased exclusively to one throttle hole 9, as shown in FIG. Supplied.
  • the throttle hole aspect ratio is set to 3.5 or less, the flow loss in the entire processing core part CORE is small, and gas is also introduced into the flow F2 in the throttle hole 9 on the gas introduction side. As a result, the flow rate is lower than the flow F1 in the other throttle hole 9, but this is not excessively impaired.
  • the introduced gas can be promptly guided to the strong stirring region SM that is combined and expanded downstream of the collision portion 10. That is, the flow from the throttle hole 9 on the gas introduction side can be shared by the outflow chamber 7 in the strong stirring region SM mainly formed on the throttle hole 9 side where the gas is not introduced. Despite the fact that the gas flows in a biased manner in one of the throttle holes 9, extremely efficient gas dissolution and pulverization is possible.
  • the gas introduction holes 28 may be provided for all the throttle holes 9 (two in the example of FIG. 20), and in this case, the gas is distributed to both of the throttle holes 9 (impact portion 10 thereof). Being supplied. Further, as in the liquid processing nozzle 171 in FIG.
  • a configuration in which the gas introduction hole is not provided in the nozzle body 2 is adopted. It is good also as a system which makes gas flow in on the liquid supply path
  • FIG. In this method, since the reduced pressure suction effect at the throttle portion cannot be used when supplying gas, it is necessary to slightly increase the gas supply pressure, but there is an advantage that gas can be easily supplied uniformly to each throttle hole 9 of the liquid processing nozzle 171. is there.
  • a gas introduction hole may be provided in the inflow chamber 6 of the liquid processing nozzle 171 upstream of the throttle hole 9.
  • FIG. 24 shows a state in which the liquid processing nozzle 171 of FIG. 21 is arranged so that the flow direction is horizontal and gas dissolution is performed.
  • the bubbles G forming the gas phase tend to be biased upward due to gravity, and the gas phase is likely to be biased toward the throttle hole 9 located above.
  • FIG. 25 shows a state in which the liquid processing nozzle 171 of FIG. 21 is arranged so that the flow direction is vertical to perform gas dissolution.
  • the liquid inlet 4 for introducing the gas is naturally positioned on the lower side to introduce the multiphase flow.
  • the plurality of throttle holes 9 have a small throttle hole aspect ratio and are arranged close to the center of the partition wall portion 8, the liquid phase and the gas phase are unlikely to drift, and the gas phase GB is uniform in each throttle hole 9. And uniform gas dissolution is possible.
  • the gas dissolving method of the present invention the simplest method is to dissolve the gas while flowing the liquid through the liquid processing nozzle 1 for only one pass.
  • FIG. 26 shows an example of the gas dissolving apparatus of the present invention that can embody the method
  • FIG. 27 shows an example of its use.
  • a liquid supply pipe (inflow hose) 405 (a liquid supply unit that forms a mixed phase flow supply means) is connected to an external liquid supply source (for example, a hot-water mixing tap 408 of a water supply or a water heater) (FIG. 27).
  • an external liquid supply source for example, a hot-water mixing tap 408 of a water supply or a water heater
  • a liquid supply pipe connecting portion 202B (having a mounting screw portion 202r) is connected.
  • a liquid processing nozzle 71 shown in FIG. 20 is provided at the tip of the liquid supply pipe connecting portion 202B, and a gas-dissolved liquid obtained by dissolving the gas in one pass at the liquid processing nozzle 71 flows out from the liquid outlet. It has become.
  • a liquid discharge pipe connecting portion 202A (having a mounting screw portion 202r) for connecting a gas-dissolved liquid discharge pipe (outflow hose) 402 (FIG. 27) is provided on the liquid outlet 5 side.
  • the gas dissolving apparatus 200 includes a main body case 201, and a liquid discharge pipe connecting portion 202A and a liquid supply pipe connecting portion 202B each made of a metal threaded pipe joint are attached to the surface of the main body case 201.
  • An internal liquid pipe 205 is connected to the liquid supply pipe connecting portion 202B, and further, the liquid inlet side of the liquid processing nozzle 71 of FIG. 20 is connected via a flow sensor (flow switch) 204 and a pipe joint 203. Is connected to the liquid discharge pipe connecting portion 202A.
  • a gas supply port joint 211 for connecting a gas supply pipe connected to an external gas supply source is attached to the surface of the main body case 201.
  • the gas introduction joint 30 and the gas supply port joint 211 of the liquid processing nozzle 71 are connected to each other by a gas supply pipe 210.
  • the check valve 207 and the electromagnetic valve 208 are connected from the liquid processing nozzle 71 side.
  • the pressure sensor 209 are arranged in this order.
  • the check valve 207 is for preventing a reverse flow of the liquid flow from the liquid processing nozzle 71 side when the gas supply flow in the gas supply pipe 210 is interrupted, and the electromagnetic valve 208 is in the gas supply pipe 210. This is for switching the gas supply flow between the cutoff state and the supply state.
  • the pressure sensor is for detecting the gas pressure in the gas supply pipe 210 to determine the presence or absence of the gas supply flow.
  • the main body case 201 is further provided with a control board 212 that constitutes a gas supply control means for switching and controlling the power supply circuit 213 and the gas supply flow in the gas supply pipe 210 between a cut-off state and a supply state.
  • a power switch 214 and a power lamp 215 are attached to the surface of the battery.
  • the switch signal SS from the power switch 214 and the detection signals SF and SP from the flow sensor 204 and the pressure sensor 209 are input to the control board 212.
  • An operation signal from the gas flow control operation unit 216 is also input to the control board 212.
  • the power supply circuit 213 receives the drive power supply voltage from the commercial power supply via the power supply cord 217c and the power supply plug 217 (or an AC adapter with a plug), and outputs the drive voltage and signal source voltage of each place to the control board.
  • the control board 212 performs the following control operation. (1) As the power switch 214 is turned on, power supply voltage 215 is detected and the power lamp 215 is turned on.
  • the drive signal SVD is output to the solenoid valve 208 to drive the solenoid valve 208 to the open state (thereby, the liquid processing nozzle is connected via the gas supply pipe 210). Gas is supplied).
  • the flow sensor 204 outputs a detection signal SF for detecting the liquid flow in the internal liquid pipe 205; b.
  • the pressure sensor 209 outputs a gas supply pressure detection signal SP in the gas supply pipe 210, and c.
  • the gas flow control operation unit 216 is in an operation state permitting gas supply.
  • the electromagnetic valve 208 is kept closed.
  • the pressure reducing valve 411 of the carbon dioxide cylinder 410 serving as a gas supply source and the gas supply port joint 211 of the gas dissolving apparatus 200 are connected by a gas supply tube 412.
  • the gas dissolving apparatus 200 of FIG. 26 operates as follows. When the power switch 214 is turned on and the valve of the carbon dioxide gas cylinder 411 is open, if the hot-water mixing tap 408 is opened in this state, hot water is supplied to the gas melting apparatus 200 and sprayed from the shower head 401. . At this time, the flow sensor 204 in FIG. 26 detects the flow of hot water, and the pressure sensor 209 detects the carbon dioxide pressure supplied through the gas supply pipe 210. SF and gas supply pressure detection signal SP are input.
  • the control substrate 212 outputs the drive signal SVP to the electromagnetic valve 208, and the electromagnetic valve 208 is opened and the liquid processing into which hot water flows. Carbon dioxide is supplied to the nozzle 71, and hot water containing dissolved carbon dioxide and fine bubbles is jetted from the shower head 401.
  • the control substrate 212 stops the output of the drive signal SVP, the electromagnetic valve 208 is closed, and the carbon dioxide gas is supplied to the liquid processing nozzle 71. Stops.
  • the gas flow control operation unit 216 is configured as a foot switch, and the state in which the foot switch 216 is urged by the foot is defined as an operation state that permits gas supply (of course, the reverse is also possible). Good). For example, when a hair washing operator such as a hairdresser holds the shower head 401 to wash the hair of a customer or the like, carbon dioxide gas is supplied while the foot switch 216 is stepped on. Gas supply stops immediately. Therefore, the use of the carbonated fine bubble water and the non-carbonated fine bubble water can be quickly and finely switched by operating the foot switch 216.
  • fine bubbles are mainly used for cleaning effects such as removal of sebum, scalp dirt, and horny plugs that fill pores, as well as to improve the moisture retention of the hair and to prevent rough hands by maintaining the skin's moisture retention. It can be enjoyed in any mode of carbonated fine bubble water and non-carbonated fine bubble water. There is also a report that when the sebum stain is particularly strong, the effect of removing sebum is more remarkable when the pH of the warm water is not acidic, that is, non-carbonated fine bubble water.
  • the carbonic acid fine bubble water mode naturally involves the consumption of carbon dioxide gas, it is more economical to suppress the carbon dioxide gas consumption by using non-carbonic fine water bubbles in a situation where the above-mentioned effect specific to carbonation is not particularly required. Thus, it can be said that it is desirable to appropriately use each mode of the carbonated fine bubble water and the non-carbonated fine bubble water depending on the scene.
  • the electromagnetic valve 208 of FIG. 26 is automatically closed, and even if the valve of the carbon dioxide cylinder 410 is open, useless carbon dioxide may flow out of the shower head 401. Absent.
  • FIG. 28 shows an example of a gas dissolving device 250 that uses the liquid processing nozzle 171 of FIG. 23 without gas introduction holes instead of the liquid processing nozzle 71 of FIG. 20 and realizes the same function as FIG. It is.
  • FIG. 29 shows an example of an apparatus in which hydrogen is dissolved in a liquid in one pass using the liquid processing nozzle of the present invention.
  • Raw material water (including an aqueous solution and a colloidal solution as a concept) 502 is stored in a tank 501, and a raw material water supply pipe 51 extending from the tank 501 is sent along a gas introduction unit 219 including an ejector and the like.
  • the liquid pump 505 and the liquid processing nozzle 1 of the present invention are provided in this order.
  • Hydrogen gas is supplied to the gas introduction part 219 from a hydrogen cylinder 420 as a hydrogen gas supply source via a pressure reducing valve 411 and a gas supply tube 412.
  • the raw water from the tank 501 is supplied with hydrogen gas from the hydrogen cylinder 420 at the gas introduction unit 219 to become a mixed phase flow of water / hydrogen gas, and is sucked into the liquid feed pump 505.
  • the hydrogen gas is preliminarily pulverized into bubbles of about 50 to 1000 ⁇ m by supplying hydrogen gas into the stirring flow in the pump inside the liquid feed pump 505 and supplied to the liquid processing nozzle 1 on the downstream side of the pump. Therefore, the dissolution efficiency of hydrogen gas and the pulverization efficiency into fine bubbles of 1 ⁇ m or less are further enhanced.
  • the treated water 514 dissolved with hydrogen gas is recovered from the outlet 511 to the recovery container 512.
  • a bottling nozzle (not shown) is attached to the outlet 511, and it is not poured into the recovery container 512, but bottling into an individual container such as an aluminum bottle or an aluminum pouch with low hydrogen permeability, You may make it seal.
  • the flow rate of hydrogen for forming the multiphase flow of the above-described configuration is Q1
  • the flow rate of water is Q2
  • the movement on the liquid inlet side If the water pressure is 0.015 MPa or more and 0.3 MPa or less and the hydrogen / water flow ratio Q1 / Q2 is 0.1 or more and 0.3 or less and one pass is supplied as described above, the dissolved hydrogen concentration of the treated water 514 is instantaneous. To 0.3 ppm or more.
  • the dissolved hydrogen concentration will be 1 ppm or more despite one pass. Can be increased.
  • the hydrogen gas introduction position may be set between the nozzle 1 and the pump 505 instead of the suction side of the pump 505, or hydrogen is introduced into the gas introduction hole 28 using the nozzle 71 of FIG. However, in this case, the effect of preliminary pulverization of hydrogen gas by the pump 505 cannot be obtained. (Embodiment 4) Next, the gas dissolving device 260 in FIG.
  • the multiphase flow supply means (specifically, the liquid supply unit) includes circulation pipes 422 and 425 that return from the liquid storage unit 430 that stores the liquid to the liquid storage unit 430 via the liquid processing nozzle 71 (FIG. 30), The liquid in the liquid storage unit 430 is mixed with the gas from the gas supply unit 410 through the circulation pipes 422 and 425, and then circulated through the liquid processing nozzle 71 (FIG. 30) and then returned to the liquid storage unit 430.
  • the liquid feed pump 218 is configured to be liquid. Returning to FIG.
  • the configuration of the gas dissolving apparatus 260 will be further described. Since the gas dissolving device 260 has the same configuration as the gas dissolving device 200 of FIG. 26 except that the liquid feed pump 218 is incorporated in the middle of the internal liquid pipe 205, only the differences will be mainly described below. Explanation will be given, and the same components as those in FIG. That is, in this configuration, the internal liquid pipe 205 is divided into a first pipe 205A on the pump inlet side and a second pipe 205B on the pump outlet side, which are connected to the suction side and the discharge side of the liquid feed pump 218, respectively.
  • the liquid feed pump 218 receives a drive voltage from the power supply circuit 213. Also, the foot switch in FIG.
  • the control board 212 performs the following control operation.
  • (1) As the power switch 214 is turned on, power supply voltage 215 is detected and the power lamp 215 is turned on.
  • the drive signal SVD is output to the solenoid valve 208 to drive the solenoid valve 208 to the open state (thereby, the liquid processing nozzle is connected via the gas supply pipe 210). Gas is supplied).
  • the flow sensor 204 outputs a detection signal SF for detecting the liquid flow in the internal liquid pipe 205;
  • the pressure sensor 209 outputs a gas supply pressure detection signal SP in the gas supply pipe 210, and (3) When either a or b in (2) is not established, the electromagnetic valve 208 is kept closed.
  • the application destination of the gas dissolving device 200 is a bath, and it is used as a so-called carbonated bath or hydrogen bath in which carbon dioxide or hydrogen is dissolved as a gas while circulating hot water in the bathtub 430 as a liquid storage unit through the gas dissolving device 260.
  • a return side pipe 425 Connected to the liquid supply pipe connecting portion 202B of the gas dissolving apparatus 260 is a return side pipe 425 that forms part of the above-described circulation pipe that returns the hot water in the bathtub 430 to the gas dissolving apparatus 260.
  • the liquid discharge pipe connection 202A of the gas dissolving device 260 is connected to a discharge side pipe 422 that forms part of a circulation pipe that discharges hot water in which gas has been dissolved by the gas dissolving device 260 into the bathtub 430.
  • a gas supply tube includes a pressure reducing valve 411 of a carbon dioxide gas cylinder 410 (or a hydrogen gas cylinder 420: the description will be represented by the case of the carbon dioxide gas cylinder 410) and a gas supply port joint 211 of the gas dissolving device 260 as a gas supply source. 412 is connected.
  • FIG. 31 first, hot water is filled in a bathtub 430 from a water heater (not shown).
  • the valve of the carbon dioxide cylinder 411 is opened, and the power switch 214 (FIG. 30) is turned on.
  • the pump 218 starts to operate, sucks hot water in the bathtub 430 through the return side pipe 425, and circulates and flows so as to return to the bathtub 430 through the discharge side pipe 422 while passing through the liquid processing nozzle 71.
  • the flow sensor 204 detects the flow of hot water
  • the pressure sensor 209 detects the carbon dioxide pressure supplied through the gas supply pipe 210.
  • a detection signal SF and a gas supply pressure detection signal SP are input.
  • the control board 212 outputs the drive signal SVP to the solenoid valve 208, the solenoid valve 208 is opened, the carbon dioxide gas is supplied to the liquid processing nozzle 71, and circulates as hot water containing dissolved carbon dioxide gas and fine bubbles. Will continue.
  • the carbon dioxide gas concentration in the hot water in the bathtub 430 increases with the passage of the circulation time.
  • the power switch 214 is turned off at the preferred carbon dioxide concentration, the circulation is stopped.
  • the electromagnetic valve 208 in FIG. 26 is automatically closed and the valve of the carbon dioxide cylinder 410 is open, there is no possibility that wasteful carbon dioxide will be lost.
  • the hot water in the bathtub 430 is circulated in a state where the carbon dioxide gas is not supplied. In this case, the hot water in the bathtub 430 becomes water containing fine bubbles.
  • hydrogen gas when hydrogen gas is used, the following effects are expected. That is, since the size of dissolved hydrogen molecules is very small, rapid absorption from the skin surface such as cell gaps is expected, and hydrogen gas evaporating from the oil surface can be taken in by respiration. Dissolved hydrogen that permeates cells in the skin inactivates active oxygen in the skin tissue due to its reducing action, and is active due to active oxygen (generally active as a factor such as spots, wrinkles, skin inflammation, and dryness) Suppression of oxygen is often associated).
  • FIG. 32 shows an example of an apparatus in which hydrogen, nitrogen, or oxygen is dissolved in a liquid while circulating using the liquid processing nozzle of the present invention.
  • the apparatus 550 is common in many parts to the apparatus 500 of FIG. 29 of the third embodiment, but the pipe 507 extending from the tank 501 is not a one-pass raw material water supply pipe but a tank side outlet 506. Is formed as a circulation pipe that returns to the tank side inlet through the gas introduction part 219, the liquid feed pump 505, and the liquid processing nozzle 1 (the other components are the same as those of the apparatus 500 in FIG. 29). Therefore, the same reference numerals are given and the description will not be repeated). Similarly to FIG.
  • hydrogen gas is supplied to the gas introduction unit 219 from a hydrogen cylinder 420 as a hydrogen gas supply source via the pressure reducing valve 411 and the gas supply tube 412.
  • the liquid feed pump 505 When the liquid feed pump 505 is operated, the raw material water from the tank 501 is supplied with hydrogen gas from the hydrogen cylinder 420 at the gas introduction unit 219 and becomes a mixed phase flow of water / hydrogen gas, and the hydrogen gas phase is changed by the liquid feed pump 505.
  • the liquid processing nozzle 1 dissolves the hydrogen gas and pulverizes it into fine bubbles, and returns to the tank 502.
  • the duration of the dissolved hydrogen concentration is much longer than that of water in which hydrogen gas is merely dissolved because of the large amount of fine bubble hydrogen (hydrogen nanobubbles or colloidal hydrogen) (FIGS. 37 and 38: described later).
  • the raw water 502 can be dissolved in nitrogen and thus deoxygenated.
  • the oxygen concentration of the raw water 502 can be reduced with a smaller nitrogen gas flow rate and circulation time. Formation of nitrogen fine bubbles makes it possible to maintain a low dissolved oxygen concentration state for a long period of time.
  • the pump water pressure on the inlet side of the liquid processing nozzle 1 is, for example, 0.015 MPa or more and 0.3 MPa or less, and the nitrogen / water flow rate ratio Q1 / Q2 is set to 0.00.
  • the concentration of dissolved oxygen in water can be 1 ppm or less, for example, from 1 to 0.3, for example, up to about 3 cycles.
  • the raw water 502 can be an alcoholic beverage such as liquor or wine.
  • oxygen dissolved before circulation is discharged by nitrogen substitution, and the alcohol beverage can be prevented from being oxidized.
  • antioxidants such as nitrite that have been added to the antioxidant of beverages.
  • the oxygen concentration in the alcoholic beverage is less likely to increase thereafter, and long-term quality maintenance is possible.
  • FIG. 1 In FIG. 1
  • the raw water 502 can be dissolved in oxygen.
  • the dissolved oxygen concentration can be significantly increased with a small oxygen gas flow rate and circulation time.
  • the tank 501 it can be used as a fish breeding tank or a ginger for curing live fish (including shellfish), and even if oxygen consumers such as fish and shellfish are present, the oxygen gas flow rate can be reduced. Highly dissolved oxygen concentration can be maintained, which in turn contributes greatly to maintaining the freshness of fish and shellfish, or improving rearing density.
  • the gas pure oxygen may be used, or when using raw water deficient in oxygen from the beginning, a mixed gas of nitrogen and oxygen such as air may be used.
  • the pH value of the sodium hypochlorite aqueous solution is kept weakly acidic, for example, around 4.3 to 6, and the hypochlorous acid concentration of the dissociated substance effective for sterilization and disinfection can be greatly increased.
  • the pH value fluctuation can also be reduced by the pH buffering action peculiar to carbonic acid.
  • the sodium hypochlorite aqueous solution has a hypochlorite ion concentration of 10 ppm or more and 1000 ppm or less (particularly preferably 30 ppm to 200 ppm or less), and a dissolved concentration of carbon dioxide gas is 200 ppm or more and 1500 ppm or less.
  • a sodium hypochlorite aqueous solution having a target concentration is prepared in advance and stored in a tank (not shown) or the like, and is externally pumped from the liquid inflow pipe connecting portion 202B side of the gas dissolving apparatus 200, 250 of FIG. Etc., the carbon dioxide gas is dissolved to adjust the pH of the sodium hypochlorite aqueous solution to 4.3-6, and then taken out from the liquid discharge pipe connection 202A side and can be used for disinfection and the like. .
  • the carbon dioxide gas may be dissolved in normal water using the gas dissolving apparatus 200, 250, and the sodium hypochlorite aqueous solution may be added later.
  • a device 270 in FIG. 34 shows an example incorporated in the gas dissolving device 260 in FIG. 30, and a sodium hypochlorite aqueous solution supply unit 310 includes an aqueous solution tank 311 for holding a sodium hypochlorite aqueous solution, a liquid An aqueous solution supply nozzle 317 incorporated downstream of the processing nozzle 71 and a liquid feed pump 312 for quantitatively feeding the aqueous sodium hypochlorite solution in the aqueous solution tank 311 to the aqueous solution supply nozzle 317 are provided.
  • the aqueous solution supply nozzle 317 is configured by using a tee joint (which may be a venturi-type ejector), a liquid introduction joint 330 is attached to the branch opening, and the liquid supply pipe 314 from the aqueous solution tank 311 is fed. It is attached to a liquid introduction joint 330 via a liquid pump 312.
  • a tee joint which may be a venturi-type ejector
  • a liquid introduction joint 330 is attached to the branch opening, and the liquid supply pipe 314 from the aqueous solution tank 311 is fed. It is attached to a liquid introduction joint 330 via a liquid pump 312.
  • the rest of the configuration and basic operation are the same as in FIG. 26, and common constituent elements are given the same reference numerals as in FIG.
  • the pump 218 operates, and the carbon dioxide gas is dissolved by the liquid processing nozzle 71 in the same operation as in FIG. 29 while taking the raw water from the liquid inflow pipe connecting portion 202B side.
  • the liquid feed pump 312 operates, and a sodium hypochlorite aqueous solution is quantitatively injected from the aqueous solution supply nozzle 317 downstream of the liquid processing nozzle 71.
  • the flow rate of the liquid feed pump 312 depends on the concentration of the sodium hypochlorite aqueous solution to be added and the flow rate of the raw material water fed by the pump 218, and the hypochlorite ion concentration obtained on the liquid discharge pipe connecting portion 202A side is It is set to be 10 ppm or more and 1000 ppm or less. It is also possible to configure so that the supply / stop of carbon dioxide gas can be switched manually or automatically during the injection of the sodium hypochlorite aqueous solution. In FIG.
  • the mode is switched to the carbon dioxide gas supply mode to weakly acidic hypochlorous acid. It can contribute to the maintenance of a higher level of hygiene, such as sterilization with water.
  • Example 1 As the nozzle configuration, a nozzle 171 shown in FIG. 23 was used for a test in which gas dissolution was not performed, and a nozzle 71 shown in FIG. 20 was used for a test in which gas dissolution was performed. These nozzles are only the presence or absence of the gas introduction hole 28 in the bowl-shaped portion 2a of the nozzle body 2.
  • the material of the nozzle body 2 is ABS resin
  • the inner diameter of the liquid inlet 4 and the liquid outlet 5 is ⁇ 14 mm (Table 1 described later, numbers 17 and 18 as comparative examples are 18 mm)
  • the flow direction of the inflow chamber 6 and the outflow chamber 7 The length of each is 30 mm.
  • the number of formed throttle holes 9 is either two in the arrangement shown in FIG. 2 or four shown in FIG. 15, and the inner diameter d of the throttle holes 9 varies from ⁇ 3.0 to ⁇ 4.6 mm.
  • the throttle hole displacement T was set to various values of 0.9 to 5.5 mm.
  • the outer peripheral edge of the partition wall 8 is centered on the central axis O of the liquid channel 3 as shown in the projections of FIGS. 1 and 15 according to the values of the inner diameter d of the throttle hole 9 and the throttle hole displacement T. It was formed so as to substantially coincide with the circumscribed circle 20 on the inner peripheral edge of the throttle hole 9, and the thickness was adjusted to various values of 7.0 to 20.0 mm.
  • the position of the upstream edge of the most upstream screw member pair 10 ⁇ / b> D is determined to coincide with the end face of the partition wall portion 8.
  • one screw member is arranged for each throttle hole so that the remaining section length Lp for the throttle hole 9 is 0 to 7 mm.
  • the gas introduction hole 28 in FIG. 20 has an inner diameter of ⁇ 2 mm, and is formed in a shape opening in the corresponding throttle hole 9 upstream of the screw member.
  • the total flow sectional area Se in the core part CORE of each nozzle is taken from the liquid inflow port 4 side, and the liquid flow area (that is, the screw member 10 in FIG.
  • the area (hereinafter referred to as the total flow cross-sectional area Se) of the main flow region 21 and the liquid flow gap 15 which is not present was calculated by image analysis.
  • Table 1 summarizes the main dimensions and parameter values of the core part CORE, including the value of the total flow sectional area Se.
  • the nozzles with the numbers marked with * indicate that they are outside the scope of the present invention in the dimensions or parameter values marked with * as in the table.
  • the following test was done using the above nozzles. The results are summarized in Table 2.
  • (1) Measurement of flow rate at a constant water pressure A pipe extending from a water tap with a source pressure of 0.2 MPa was connected to the inlet side of each nozzle, and a water pressure gauge was attached to the inlet side.
  • the water flowing out from the nozzle is collected in a 1 L beaker and then left for 1 minute to float coarse bubbles and then used for measurement.
  • the laser diffraction particle size distribution measuring device makes a laser light beam incident on a measurement cell at a certain angle, and a three-dimensional scattering distribution of light scattering generated at the gas-liquid interface according to the refractive index difference between the bubble and water and the bubble diameter. By utilizing the difference, scattered light intensity for each angle is detected by an individual photodetector, and information related to the bubble diameter distribution is obtained from the detected intensity distribution of each sensor.
  • the obtained distribution is a volume bubble size distribution, but the software attached to the apparatus converts the bubble into a spherical shape by converting it into a spherical shape, and the number average bubble size calculated based on this is displayed.
  • the measuring device is accompanied by a function for measuring the absorbance of the laser light passing through the cell, and the higher the absorbance, the higher the concentration of bubbles in the cell.
  • the absorbance value is relative, and information on the absolute value of the bubble concentration cannot be obtained. However, it is possible to relatively compare the bubble concentrations of a plurality of samples to be measured simultaneously.
  • the absorbance value is also displayed together (note that the maximum absorbance displayed by the device is 0.2).
  • the pump circulation flow rate was adjusted so that the supply pressure measured between the nozzle 1 and the pump 505 was 0.1 MPa.
  • pure oxygen gas was supplied from the gas introduction part 219 while adjusting the supply pressure to be 0.3 MPa and the oxygen gas flow rate to be 20% of the circulation flow rate in terms of normal pressure to dissolve the oxygen gas ( The top of the tank is open to the atmosphere).
  • the circulation time was determined to be equal to the time obtained by dividing the volume of purified water in the tank by the pump circulation flow rate. After the circulation was stopped, 5 L of water dissolved with oxygen gas was immediately taken from the outlet 503 into a resin beaker having an opening diameter of 18 cm, and the dissolved oxygen concentration was measured with an optical dissolved oxygen meter.
  • the obtained results will be described.
  • Example nozzles are comparative example nozzles Nos. 17 and 18 that do not satisfy both of these two conditions (the nozzle No. 18 is substantially the same as the nozzle of Patent Document 9 shown in FIG. 40).
  • the water flux value obtained at the same water supply pressure is significantly higher than that having a configuration.
  • the value of the water flux increases as the value of the throttle hole aspect ratio decreases, and as the distance of the throttle hole displacement T from the inner diameter d of the throttle hole increases.
  • the number average value of the bubble diameter tends to be small, and the absorbance value reflecting the bubble formation density tends to be large.
  • the nozzle of No. 6 having a smaller remaining section aspect ratio has a larger remaining section aspect ratio.
  • the value of the water flux is almost the same as that of the nozzle No. 6, but the number average value of the bubble diameter is smaller for the nozzle No. 6 and the absorbance value tends to be larger.
  • the nozzle with a shorter remaining length of the throttle hole has higher generation efficiency of fine bubbles.
  • the number of the throttle holes 9 is two, and each throttle hole 9 has four nozzles as shown in FIG.
  • the number 1 nozzle adopting the configuration of FIG. 2 is superior in the generation efficiency of fine bubbles.
  • the dissolution efficiency is reduced regardless of the type of gas as the value of the throttle hole aspect ratio decreases and as the distance of the throttle hole displacement T from the inner diameter d of the throttle hole increases. It can be seen that is improved.
  • the nozzle of No. 6 having a smaller remaining section aspect ratio has a larger remaining section aspect ratio. Nozzle and water flux values are almost the same, but each gas shows much higher dissolution performance than number 7.
  • Example 2 the configuration shown in FIG. 2 is adopted. It can also be seen that the No. 1 nozzle shows a melting performance that is twice or more that of No. 11 regardless of the type of gas.
  • Example 2 Among the nozzles in Table 1, the results of examining the dissolving ability of carbon dioxide gas and hydrogen gas in more detail for the nozzle of No. 1 that has particularly high gas dissolving performance will be described. First, with respect to carbon dioxide, the water pressure and the carbon dioxide / water flow ratio were set to various values in the same apparatus as in Example 1, and the pH and carbon dioxide concentration of the obtained water were measured.
  • the above measurement was performed while changing the flow rate of carbon dioxide gas (the gas pressure is the same as in Example 1) while fixing the water flow rate (water flux) at various values. Also, the volume of dissolved carbon dioxide is calculated from the carbon dioxide concentration of the water obtained, and the dissolution efficiency of carbon dioxide based on the total flow rate of the flowed carbon dioxide and the flow rate (exhaust gas flow rate) that cannot be dissolved and become waste gas are calculated. Calculated.
  • Table 3 a graph plotting carbon dioxide concentration measurement results for each carbon dioxide gas / water flow ratio for each water flux value is plotted in FIG. The results are shown in FIG.
  • FIG. 37 is a graph showing the relationship between the measured value of the dissolved hydrogen concentration and the circulation time when water was circulated while introducing hydrogen under the same conditions as in Example 1 using the same nozzle number 1. (The tank top is open to the atmosphere). According to Table 2, the flow rate of the nozzle No.
  • the hydrogen concentration reaches a saturation value of 1.6 ppm at room temperature and normal pressure, and after that, after 30 minutes, the hydrogen concentration reaches around 1.8 ppm, which exceeds the saturation value. After that, the same dissolved hydrogen value was maintained until 60 minutes later. Then, 5 L of water that had been circulated for 60 minutes was collected in a resin beaker having an opening diameter of 18 cm, and the change in dissolved hydrogen concentration was examined while exposing it to the atmosphere at a temperature of 20 ° C.
  • Liquid treatment nozzle 1, 51, 71, 171 Liquid treatment nozzle 2 Nozzle body O Center axis 3 Liquid flow path 4 Liquid inlet 5 Liquid outlet 6 Inflow chamber 7 Outflow chamber 8 Partition portion 9 Restriction hole 10 Colliding portion (screw member) CORE processing core part 11 mountain part 12 valley part 15 liquid distribution gap 16 inflow side connection part (screw part) 17 Outflow side connection (screw) 20 circumscribed circle 28 gas introduction hole 200,260,270,500,550,560 gas dissolving apparatus

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sanitary Device For Flush Toilet (AREA)
  • Domestic Plumbing Installations (AREA)
  • Bathtubs, Showers, And Their Attachments (AREA)
  • Accessories For Mixers (AREA)

Abstract

L'invention concerne une buse de traitement de liquide qui élimine les effets d'écoulements sollicités et est ainsi capable de produire un effet de cavitation adéquat, et par extension, un effet de génération de micro-bulles ou une efficacité de dissolution de gaz. La buse de traitement de liquide (1) comprend: un corps de buse (2) comprenant un passage de liquide (3) formé en son sein; et un noyau de traitement (CORE) comprenant une paroi de séparation (8) qui sépare le passage de liquide (3) en une chambre d'admission (6) sur un côté d'admission de liquide (4) et une chambre d'évacuation (7) sur un côté d'évacuation de liquide (5), une pluralité d'ouvertures (9) qui sont formées à travers la paroi de séparation (8) et qui permettent à la chambre d'admission (6) et à la chambre d'évacuation (7) de communiquer l'une avec l'autre par le biais de passages séparés, et des saillies (10) qui font saillie à partir de la surface interne des ouvertures (9) et qui sont formées sur la surface périphérique externe de sorte qu'une pluralité de sections d'arête (11) et de sections de vallée (12), qui servent de sections à débit élevé, s'étendent en alternance dans la direction périphérique. Le rapport de forme des ouvertures (9), défini par L/de (où de représente le diamètre d'un cercle équivalent à la totalité de la zone de section transversale axiale des ouvertures (9), et L représente la longueur des ouvertures (9)), est défini de manière à être égal ou inférieur à 3,5; et dans une projection sur un plan orthogonal à l'axe du corps de buse (2), plus la distance T, qui représente la distance d'un point de référence défini par la position centrale de la zone de projection de la paroi de séparation (8) au bord périphérique interne de la pluralité d'ouvertures, est inférieure au diamètre interne d des ouvertures, plus les ouvertures (9) sont positionnées à proximité.
PCT/JP2016/064072 2015-05-07 2016-05-02 Buse de traitement de liquide, procédé de traitement de liquide utilisant celle-ci, procédé de dissolution de gaz et dispositif de dissolution de gaz WO2016178436A2 (fr)

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