WO2019212028A1 - 微細気泡発生装置 - Google Patents
微細気泡発生装置 Download PDFInfo
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- WO2019212028A1 WO2019212028A1 PCT/JP2019/017592 JP2019017592W WO2019212028A1 WO 2019212028 A1 WO2019212028 A1 WO 2019212028A1 JP 2019017592 W JP2019017592 W JP 2019017592W WO 2019212028 A1 WO2019212028 A1 WO 2019212028A1
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- gas
- liquid
- flow path
- bubble generator
- reduced
- Prior art date
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Images
Classifications
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- B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
- B05B7/0458—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber the gas and liquid flows being perpendicular just upstream the mixing chamber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Definitions
- the present invention relates to a microbubble generator that generates so-called “microbubbles” or “nanobubbles” in a liquid.
- Fine bubbles having a bubble diameter smaller than 50 ⁇ m are called “microbubbles” or “nanobubbles”, and have a large diameter such as bubbles (bubble diameter is 1 mm or more) contained in general carbonated water. It has different characteristics from bubbles.
- the characteristics of the fine bubbles are, for example, the amount of dissolved gas in the liquid is large, so that the concentration of dissolved gas such as dissolved oxygen can be increased, the surface of the bubbles is negatively charged, such as air or oxygen Examples include a large amount of dissolved gas and a variety of physiologically active effects. Therefore, this kind of microbubble related technology is used in various fields.
- oxygen can be suitably supplied to roots that tend to be oxygen-deficient by spraying water containing fine bubbles into the medium.
- the amount of dissolved gas is increased, and the smaller the bubble diameter, the more difficult the bubbles are to blow and the more stably held in water.
- water having a high dissolved oxygen concentration can be given to the plant, so that a fast-growing and good-quality crop can be obtained.
- anaerobic bacteria suppression effect and pest control effect due to increased dissolved oxygen concentration in water have been reported.
- Patent Document 1 discloses a fine bubble generating apparatus using an aspirator.
- This fine bubble generating device is provided with an aspirator having a flow path for passing a liquid and a gas introduction path for introducing a sucked gas, and a tubular pipe that is provided on the liquid discharge port side of the aspirator and through which the liquid discharged from the aspirator is conducted.
- a spiral ridge is formed on the inner peripheral wall of the tubular body.
- gas is sucked from the gas introduction path by the pressure reducing effect inside the aspirator, mixed with the liquid passing through the flow path, and then guided to the ridges inside the tubular body. Fine bubbles are generated by stirring while turning in a spiral.
- the fine bubble generating device described in Patent Document 1 is a device in which gas is sucked only by the reduced pressure generated by the aspirator, and the mixture of gas and liquid is stirred by the ridges on the inner wall of the tubular body, and the fine bubbles are generated. Therefore, it is difficult to generate a large amount of fine bubbles having a bubble diameter of several tens of micrometers or less.
- the present invention has been made in view of the above-described points, and the object thereof is to generate a large amount of microbubbles having a small bubble diameter with a high concentration of fine bubbles in the liquid and a bubble diameter of several tens of micrometers or less.
- An object of the present invention is to provide a microbubble generator capable of producing
- the fine bubble generator of the present invention generates a fine bubble by mixing a liquid continuously supplied from a liquid supply source and a gas supplied from a gas supply means, thereby generating a fine bubble.
- a device that discharges a gas-liquid mixture in which a liquid and a liquid are mixed a tubular body having a liquid flow path therein, a liquid inlet for introducing liquid into the flow path, and a gas inlet for introducing gas into the flow path
- a bubble generator having a discharge port for discharging the gas-liquid mixture from the flow path, a compressor for pressurizing the gas, and a gas supply means having a gas supply port for supplying the gas pressurized by the compressor to the bubble generator
- the flow path of the bubble generator extends substantially coaxially from the liquid inlet to the outlet, and the flow path has a reduced diameter portion whose inner diameter is reduced in the liquid flow direction.
- a plurality of the reduced diameter portions are provided downstream of each reduced diameter portion.
- Gas-liquid mixing portions having an inner diameter larger than the minimum inner diameter are continuously provided, and the gas inlet of the bubble generator is formed as a plurality of through holes arranged along the circumferential direction of the outer wall of the tubular body, It is provided in the vicinity of the reduced diameter portion provided on the most upstream side in the flow path, and the gas introduction port communicates with the gas supply port of the gas supply means.
- the fine bubble generating device of the present invention is provided with a plurality of reduced diameter portions and a gas-liquid mixing portion continuous therewith in the flow path, and the pressurized gas supplied from the gas supply means is the most upstream side in the flow path. It is configured to be introduced into the flow path from the vicinity of the reduced diameter portion.
- the reduced diameter portion of the flow path is in a reduced pressure state where the pressure is reduced due to the venturi effect, so the pressure difference from the gas pressurized above atmospheric pressure increases, and the gas inlet provided near the reduced diameter portion A large amount of gas is sucked into the flow path.
- the gas introduction port is formed as a through hole along the circumferential direction of the outer wall of the tubular body on the outer periphery of the flow path, the flow velocity of the gas introduced into the flow path is increased and flows vigorously from the through hole.
- the gas introduced into the passage causes a strong swirl flow in the gas-liquid mixing part that is continuous with the reduced diameter part. Therefore, a large amount of gas is introduced into the flow path, and the gas and the liquid are reliably mixed inside the flow path, so that a gas-liquid mixed liquid having a large amount of bubbles is obtained.
- the flow velocity of the gas introduced into the flow channel from the through hole is high, the flow velocity of the liquid (gas-liquid mixture) flowing in the flow channel is accelerated.
- the gas-liquid mixed portion that has passed through the most upstream reduced-diameter portion and the gas-liquid mixing portion has a plurality of reduced-diameter portions and a gas-liquid mixing portion continuous therewith, It will pass through the reduced diameter part and the gas-liquid mixing part.
- the gas-liquid mixed liquid expands because of a reduced pressure state due to the venturi effect. Since the flow rate is reduced and the pressure is increased, the bubbles once expanded in the reduced diameter portion are crushed and contracted in the gas-liquid mixing portion, and fine bubbles having a smaller bubble diameter are obtained.
- the flow path of the bubble generator extends substantially coaxially from the liquid inlet to the outlet, the flow rate of the gas-liquid mixture flowing in the flow path is maintained at a high level. Therefore, the gas-liquid mixture discharged from the discharge port can also have a suitable hydraulic pressure.
- upstream means upstream in the flow direction of the flow path, that is, the liquid supply source side
- downstream means downstream in the flow direction of the flow path, that is, the discharge port side.
- the fine bubble generator of the present invention includes a reduced diameter portion provided on the most upstream side in the flow path of the bubble generator described above, a gas-liquid mixing portion continuous with the reduced diameter portion, and a continuous gas-liquid mixing portion. It is also preferable that the tubular body of the portion corresponding to the reduced diameter portion is formed integrally and coaxially.
- pressure resistance of a portion (most upstream diameter-reduced portion and gas-liquid mixing portion) where pressure is most applied to the flow path because pressurized gas is introduced is ensured, and pressure and momentum of the introduced gas are ensured. It is possible to prevent the reduced diameter portion and the gas-liquid mixing portion from being separated due to the swirling flow.
- the gas-liquid mixing portion provided at the most upstream side and the diameter-reduced portion continuous therewith are integrally and coaxially formed, the flow velocity of the fluid flowing through the flow path is kept high.
- the plurality of reduced diameter portions of the bubble generator described above are the minimum inner diameter of the reduced diameter portion disposed downstream from the minimum inner diameter of the reduced diameter portion disposed upstream. It is also preferable that it is formed so that is smaller. Thereby, a bubble diameter can be made smaller and the gas-liquid liquid mixture which has the fine bubble which has a bubble diameter of a nano order level can be obtained.
- the fine bubble which has a bubble diameter of nano-order level means the fine bubble whose bubble diameter is less than 1 micrometer.
- the plurality of gas-liquid mixing portions of the bubble generator described above is a gas-liquid mixing portion arranged downstream of the inner diameter of the gas-liquid mixing portion arranged upstream. It is also preferable that the inner diameter is larger.
- the minimum inner diameter of the reduced diameter portion arranged on the downstream side is formed to be small, the pressure difference between the reduced diameter portion and the gas-liquid mixing portion can be increased by increasing the inner diameter of the gas-liquid mixing portion continuous thereto. Since the bubbles become larger, the bubbles expanded at the reduced diameter portion are quickly crushed and contracted at the gas-liquid mixing portion, and fine bubbles with a further reduced bubble diameter can be obtained.
- the fine bubble generator of the present invention includes a first gas diameter-reducing portion and a first air diameter continuous from the first diameter-reducing portion from the upstream side toward the downstream side in the flow path of the bubble generator.
- the fine bubble generating apparatus of the present invention further includes a shower head, and this shower head is connected via a hose connected to the discharge port of the bubble generator. Since the shower head has the effect of increasing the overall liquid pressure inside the device until the gas-liquid mixture is released to the outside, the amount of bubbles contained in the gas-liquid mixture increases and fine bubbles in the liquid A gas-liquid mixture having a high concentration is obtained.
- the microbubble generator which has the following outstanding effects can be provided. (1) It is possible to generate fine bubbles having a small bubble diameter with a high fine bubble concentration and a bubble diameter of several tens of micrometers or less. (2) Since the liquid pressure of the gas-liquid mixed liquid having fine bubbles discharged from the discharge port can be kept high, for example, even if water is introduced into the apparatus with water pressure supplied from a water pipe or the like of the waterworks Further, it can be discharged out of the apparatus while maintaining the water pressure or as a gas-liquid mixed liquid having a higher water pressure.
- the diameter-reduced portion provided on the most upstream side, the gas-liquid mixing portion continuing to the diameter-reduced portion, and the tubular body of the portion corresponding to the diameter-reducing portion continuing to the gas-liquid mixing portion are integrally and By forming it coaxially, the pressure resistance is enhanced, and a device that can be used stably can be obtained.
- microbubble generator according to the first embodiment of the present invention will be described with reference to FIGS.
- the fine bubble generating device 1 As shown in FIG. 1, the fine bubble generating device 1 according to the first embodiment of the present invention is roughly constituted by a bubble generator 2 and a gas supply means 3.
- the fine bubble generator 2 introduces liquid continuously supplied from a faucet 6 such as waterworks into the bubble generator 2 through a hose and an adapter 4.
- a faucet 6 such as waterworks into the bubble generator 2
- an adapter 4 At the same time, it is an apparatus for introducing the pressurized gas G supplied from the gas supply means 3 into the bubble generator 2 to generate the gas-liquid mixture M inside the bubble generator 2, and is discharged from the bubble generator 2.
- the gas / liquid mixture M is taken out through an attachment including the shower head 5.
- the bubble generator 2 of the present embodiment includes a substantially circular tubular body 26 having a flow path 21 that is a space through which the liquid L or the gas-liquid mixture M flows.
- a liquid introduction port 27 connected to the faucet 6 as a liquid supply source via a hose, an adapter 4 or the like is provided.
- a discharge port 29 for discharging the gas-liquid mixed solution M generated inside the bubble generator 2 to the outside is provided at one end on the downstream side of the tubular body 26.
- the flow path 21 is a space inside the tubular body 26.
- the flow path 21 from the liquid introduction port 27 to the discharge port 29 is It is comprised so that it may extend on a substantially coaxial line.
- the center of the axial cross section in the flow path 21 is configured to be a substantially straight line. Therefore, the backflow and the flow velocity decrease of the liquid L or gas-liquid mixture M flowing in the flow direction F in the flow path 21 are suppressed, and the smooth flow of the liquid L and the like in the flow path 21 is maintained.
- the tubular body 26 is formed of a first tubular body 261 constituting the upstream flow path 21 and a second tubular body 262 constituting the downstream flow path 21.
- the inner diameter of the second tubular body 262 is larger than the inner diameter of the first tubular body 261 and has an inner diameter that is substantially the same as the outer diameter of the first tubular body 261. Therefore, both are connected by fitting the outer peripheral surface of the downstream end portion of the first tubular body 261 to the inner peripheral surface of the upstream end portion of the second tubular body 262.
- the tubular body 26 is comprised from two members, it is not limited to it, The tubular body 26 may be comprised from one member like 2nd embodiment mentioned later. It is also possible to configure a plurality of members.
- the flow path 21 of the bubble generator 2 according to the present embodiment has a reduced diameter portion (first reduced diameter portion 22, second reduced diameter portion) in which the inner diameter and the outer diameter are reduced in the flow direction of the liquid L. 23) are provided in two places.
- a gas-liquid mixing unit (a first gas-liquid mixing unit 24 and a second gas-liquid mixing unit 25) is provided downstream of each reduced-diameter part so as to be continuous with each reduced-diameter part.
- the number of diameter-reduced parts and the gas-liquid mixing part continuous with it are two in this embodiment, it is not limited to it, It is also possible to set it as the number exceeding two.
- the gas-liquid mixing portions 24 and 25 provided at a plurality of locations have an inner diameter (or cross-sectional area) larger than the minimum inner diameter (or minimum cross-sectional area) of the reduced diameter portions 22 and 23 adjacent to the upstream side.
- the venturi effect is imparted to the liquid L or the gas-liquid mixture M flowing in the flow path 21 by the combination of the reduced diameter portion and the gas-liquid mixing portion.
- the inner diameter 24d of the first gas-liquid mixing section is larger than the minimum inner diameter 22d of the first reduced diameter section, and the second gas-liquid mixing is smaller than the minimum inner diameter 23d of the second reduced diameter section.
- the inner diameter 25d of the part is configured to be larger.
- the gas inlet 28 is disposed along the circumferential direction of the outer wall of the tubular body 26 of the bubble generator 2.
- the gas inlet 28 is provided in the vicinity of the first reduced diameter portion 22 as four circular through-holes that are arranged substantially evenly along the peripheral side surface of the first tubular body 261. ing.
- the pressurized gas G and the liquid L are reliably mixed in the flow path 21, and a gas-liquid mixed solution M having a large amount of bubbles is obtained.
- the gas inlet 28 is comprised as four circular through-holes, a number and a shape are not specifically limited.
- the flow path 21 of the bubble generator 2 has a minimum diameter of the second reduced diameter portion arranged downstream from the minimum inner diameter 22d of the first reduced diameter portion arranged upstream.
- the inner diameter 23d is formed to be smaller. Thereby, the diameter of the bubble to produce
- the inner diameter 25d of the second gas-liquid mixing portion arranged downstream is formed larger than the inner diameter 24d of the first gas-liquid mixing portion arranged upstream. Has been. As a result, the pressure difference between the second reduced diameter portion 23 and the second gas-liquid mixing portion 25 increases in the flow path 21, so that the collapse of the bubbles is promoted in the second gas-liquid mixing portion 25. Further, the bubbles can be made finer.
- the tubular body 26 having the flow path 21 therein includes the first tubular body 261 that constitutes the upstream flow path 21 and the second tubular body 21 that constitutes the downstream flow path 21. It is comprised from the tubular body 262.
- the first tubular body 261 is provided with the liquid inlet 27, the first reduced diameter portion 22, the first gas-liquid mixing portion 24 and the second reduced diameter portion 23, and the second tubular body 261 is provided.
- the body 262 is provided with a second gas-liquid mixing unit 25 and a discharge port 29.
- the pressure resistance in the vicinity of the first reduced diameter portion 22 and the first gas-liquid mixing portion 24 where the pressure on the flow path 21 is the largest is obtained. It is secured. Also, by providing the first tubular body 261 with the second reduced diameter portion 23 and using the second tubular body 261 having a larger diameter than the first tubular body 261 as the second gas-liquid mixing portion 25, Changes in the inner diameter of the flow path 21 in the second reduced diameter portion 23 and the second gas-liquid mixing section 25 are discontinuous, and the inner diameter of the flow path 21 after the second reduced diameter portion 23 can be greatly changed. . Thus, the pressure difference between the second reduced diameter portion 23 and the second gas-liquid mixing portion 25 can be increased with a very simple configuration, and the collapse of the bubbles can be promoted.
- the bubble generator 2 in the present embodiment can be manufactured by known materials and methods.
- the bubble generator 2 according to the present embodiment uses a rigid PVC pipe having an outer diameter of 18 mm, an inner diameter of 13 mm, and a wall thickness of 2.5 mm as the first tubular body 261, and the second tubular body 262 as an outer
- a rigid PVC pipe having a diameter of 24 mm, an inner diameter of 18 mm, and a wall thickness of 3 mm is used.
- the first reduced diameter portion 22 in the first tubular body 261 is provided by drawing the outer periphery until the minimum inner diameter of the PVC pipe is about 7 to 10 mm, and is about 7 to 10 cm from the first reduced diameter portion 22.
- the first gas-liquid mixing part 24 is the first gas-liquid mixing part 24, and the second reduced diameter part 23 is a pipe so that an end having a minimum inner diameter of about 6 to 9 mm appears after the outer periphery of the PVC pipe is drawn. It is manufactured by cutting. Further, a through hole having a diameter of 2.5 mm is formed at an angular interval of about 90 degrees between the first reduced diameter portion 22 and the first gas-liquid mixing portion 24 in the circumferential direction of the outer wall of the first tubular body 261.
- the gas introduction port 28 is formed by opening four.
- the bubble generator 2 according to the present embodiment is obtained by fitting the first tubular body 261 and the second tubular body 262 thus obtained.
- the specifications and materials such as the numerical values of the tubular body 26 described above are examples, and various specifications and materials can be selected depending on the application.
- the gas supply means 3 in this embodiment includes a compressor 30, a pipe 31, a casing 34 having a gas supply port 33 and a nut 35, a connection member 32 having one end connected to the pipe 31 and the other end connected to the casing 34.
- the compressor 30 is an apparatus for pressurizing gas to atmospheric pressure or more.
- the pressure can be adjusted by the flow rate of the liquid L introduced into the bubble generator 2, but is preferably 0.15 to 0.20 MPa, preferably 0.18 MPa or more and 0.20 MPa. More preferably, it is less than.
- the gas G pressurized by the compressor 30 is transferred to the bubble generator 2 through the pipe 31 and the connection member 32.
- a cylindrical casing 34 is concentrically fixed in the vicinity of the first reduced diameter portion 22 of the first tubular body 261 on the outer periphery of the bubble generator 2, and both end portions of the cylindrical body are provided with nuts 35 and spacers.
- the casing 34 is provided with one gas supply port 33 as a through-hole penetrating the outer wall, and the inner peripheral wall of the gas supply port 33 can be screwed into a screw groove provided at one end of the connection member 32. Thread is provided.
- the compressor 30 of the gas supply means 3 the faucet 6 as a liquid supply source, the hose and adapter 4 for transferring the liquid L from the faucet 6 to the liquid inlet 27 of the bubble generator 2, and the shower The head 5 is omitted.
- the liquid L is continuously introduced into the liquid inlet 27 of the bubble generator 2 as shown in FIG.
- the liquid pressure of the liquid L to be introduced is, for example, about 0.05 to 0.3 MPa in the case of water supplied from a water supply pipe, but the liquid inlet is kept as it is without being pressurized with a pump or the like. 27 can be used.
- the inner diameter (cross-sectional area) of the flow path 21 is reduced in the first reduced diameter portion 22, so that the flow rate of the liquid L is increased due to the venturi effect.
- the pressure in the vicinity of the first reduced diameter portion 22 is reduced.
- the gas G pressurized to atmospheric pressure or higher is transferred to the gas supply port 33 through the pipe 31 and the connection member 32 as shown in FIG.
- the pressurized gas G transferred to the gas supply port 33 is introduced into the gas inlet 28 of the bubble generator through the gap 36 between the first reduced diameter portion 22 of the first tubular body 261 and the casing 34.
- the pressure difference from the gas G pressurized to atmospheric pressure or higher becomes large, and the first A large amount of gas is sucked and introduced into the flow path 21 from a gas inlet 28 provided in the vicinity of one reduced diameter portion 22.
- the gas inlet 28 of the bubble generator 2 is formed as a through-hole along the circumferential direction of the outer wall of the first tubular body 261 and is therefore introduced into the flow path 21.
- the flow rate of the pressurized gas G is higher. Therefore, the pressurized gas G that is vigorously introduced into the flow path 21 from the gas introduction port 28 causes a strong swirl flow in the liquid L flowing through the first gas-liquid mixing unit 24. Therefore, a large amount of gas G is introduced into the flow path 21, and the gas G and the liquid L are reliably mixed in the first gas-liquid mixing unit 24, and a large amount of bubbles are contained in the liquid. A gas-liquid mixed solution M having a high fine bubble concentration is obtained. In addition, since the flow rate of the pressurized gas G introduced into the flow channel 21 from the gas introduction port 28 which is a through hole is high, the flow rate of the gas-liquid mixture M flowing in the flow channel 21 is accelerated.
- the gas-liquid mixed solution M generated in the first gas-liquid mixing unit 24 flows along the flow direction F of the flow path 21, and the second reduced diameter portion 23. Pass through.
- the inner diameter (cross-sectional area) of the flow path 21 is small in the second reduced diameter portion 23, the flow rate of the gas-liquid mixture M is increased due to the venturi effect, and in the vicinity of the second reduced diameter portion 23. The pressure is lowered. For this reason, the bubbles contained in the gas-liquid mixed solution M are temporarily expanded in the second reduced diameter portion 23. Subsequently, the gas-liquid mixed solution M moves to the second gas-liquid mixing unit 25.
- the second gas-liquid mixing unit 25 Since the second gas-liquid mixing unit 25 has a large inner diameter, the flow rate of the gas-liquid mixed solution M decreases and the pressure increases. Becomes higher. Therefore, the bubbles once expanded in the second reduced diameter portion 23 are crushed and contracted in the second gas-liquid mixing portion 25 to make the bubbles finer.
- the minimum inner diameter 23d of the second reduced diameter portion is smaller than the minimum inner diameter 22d of the first reduced diameter portion, and the inner diameter 24d of the first gas-liquid mixing portion. Since the inner diameter 25d of the second gas-liquid mixing part is designed to be larger than the second gas-liquid mixing part, the pressure difference between the second reduced-diameter part 23 and the second gas-liquid mixing part 25 becomes larger. Yes.
- the bubbles expanded in the second reduced diameter part 23 are quickly crushed and contracted in the second gas-liquid mixing part 25, and nano-order level fine bubbles with a further reduced bubble diameter are obtained.
- the gas-liquid mixed solution M containing fine bubbles thus obtained is discharged from the discharge port 29 and discharged through the shower head 5 or the like. Further, since the flow path 21 of the bubble generator 2 extends substantially coaxially from the liquid inlet 27 to the outlet 29, the flow rates of the liquid L and the gas-liquid mixture M flowing in the flow path 21 are high. Therefore, the gas-liquid mixture M discharged from the discharge port 29 also has a suitable hydraulic pressure.
- the gas-liquid mixed solution M is taken out from the outlet 29 of the fine bubble generating device 1 through the hose and the shower head 5.
- the shower head 5 has the effect of increasing the overall liquid pressure inside the apparatus until the gas-liquid mixture M is discharged to the outside. Therefore, by attaching the shower head 5 to the bubble generator 2 and configuring the fine bubble generating device 1, the amount of bubbles contained in the gas-liquid mixture M increases, and the gas / liquid concentration of the fine bubbles in the liquid is high. A mixture is obtained. Further, if the water spray plate of the shower head 5 is selected to have a small number of water discharge holes or a small water discharge hole diameter, the liquid pressure until the gas-liquid mixture M is discharged to the outside is further increased.
- a gas-liquid mixed solution M containing fine bubbles having a finer nano-order bubble size can be obtained.
- the water discharge hole diameter of the water spray plate of the shower head 5 is preferably 0.5 mm or less, more preferably 0.4 mm or less, and particularly preferably 0.3 mm or less.
- attachments such as a straight nozzle and a jet nozzle, instead of the shower head 5 according to a use.
- the liquid L and the gas G supplied to the microbubble generator 1 are generally water and air, but are not limited thereto, and various liquids or gases can be used depending on the application. .
- the fine bubble generating apparatus 10 is roughly constituted by a bubble generator 20 and a gas supply means 3.
- a bubble generator 20 and a gas supply means 3.
- the same components as those in the first embodiment will be described using the same reference numerals.
- the bubble generator 20 of the present embodiment will be described based on FIG.
- the bubble generator 20 of the present embodiment is composed of a single tubular body 260 having a substantially circular tube shape having a flow path 210 inside which a liquid L or a gas-liquid mixture M flows.
- the flow path 210 is a space inside the tubular body 260, and although the cross-sectional area and inner diameter of the flow path 210 change, the flow path 210 from the liquid introduction port 27 to the discharge port 29 extends substantially on the same line. It is configured as follows.
- the tubular body 260 is comprised from one member, it is not limited to it, The tubular body 260 may be comprised from several members like 1st embodiment.
- the flow path 210 of the bubble generator 20 has a reduced diameter portion (first reduced diameter portion 220, second reduced diameter portion) in which the inner diameter and the outer diameter are reduced in the flow direction of the liquid L. 230) are provided in two places.
- a gas-liquid mixing unit (a first gas-liquid mixing unit 240 and a second gas-liquid mixing unit 250) is provided downstream of each reduced-diameter part so as to be continuous with each reduced-diameter part.
- the number of diameter-reduced parts and the gas-liquid mixing part continuous with it are two in this embodiment, it is not limited to it, It is also possible to set it as the number exceeding two.
- the gas-liquid mixing portions 240 and 250 provided at a plurality of locations have an inner diameter (or cross-sectional area) larger than the minimum inner diameter (or minimum cross-sectional area) of the reduced diameter portions 220 and 230 adjacent to the upstream side.
- the venturi effect is imparted to the liquid L or the gas-liquid mixed liquid M flowing in the flow path 210 by the combination of the reduced diameter portion and the gas-liquid mixing portion.
- the inner diameter 240d of the first gas-liquid mixing part is larger than the minimum inner diameter 220d of the first reduced diameter part
- the second gas-liquid mixing is larger than the minimum inner diameter 230d of the second reduced diameter part.
- the inner diameter 250d of the part is configured to be larger.
- the first reduced diameter portion 220 and the first venturi portion by the first gas-liquid mixing portion 240, the second reduced diameter portion 230, and the second gas diameter portion are formed in the flow path 210. Therefore, in the present embodiment, the first reduced diameter portion 220 and the first venturi portion by the first gas-liquid mixing portion 240, the second reduced diameter portion 230, and the second gas diameter portion.
- the venturi effect is imparted at two places with the second venturi section by the liquid mixing section 250.
- the flow path 210 of the bubble generator 20 includes a minimum inner diameter 220d of the first reduced diameter portion disposed on the upstream side and a minimum inner diameter 230d of the second reduced diameter portion disposed on the downstream side. Are formed to have substantially the same diameter. Further, the inner diameter 240d of the first gas-liquid mixing portion disposed on the upstream side and the inner diameter 250d of the second gas-liquid mixing portion disposed on the downstream side are formed to have substantially the same diameter. Thereby, since the bubble generator 20 which concerns on this embodiment is obtained by reducing the diameter of the linear pipe
- the bubble generator 20 in this embodiment can be manufactured by a well-known material and method.
- the bubble generator 20 uses a rigid PVC pipe having an outer diameter of 26 mm, an inner diameter of 20 mm, and a wall thickness of 3 mm as the tubular body 260.
- the first reduced diameter portion 220 of the tubular body 260 is provided by drawing the outer periphery until the minimum inner diameter of the PVC pipe is about 15 mm, and the first reduced diameter portion 220 has an area of about 7 to 10 cm from the first reduced diameter portion 220.
- the gas-liquid mixing part 240 is provided, and the second reduced diameter part 230 is provided by drawing the outer periphery until the minimum inner diameter becomes about 15 mm, similarly to the first reduced diameter part 220.
- the specifications and materials such as the numerical values of the tubular body 260 described above are examples, and various specifications and materials can be selected depending on the application and the like.
- Example 1 Measurement of particle size of fine bubbles contained in gas-liquid mixture (1)
- the gas-liquid mixture M is generated using the microbubble generator 1, the particle size distribution of the microbubbles contained in the gas-liquid mixture M, the dissolved oxygen amount of the gas-liquid mixture M, and the outlet of the bubble generator 2
- the water pressure of the gas-liquid mixed solution M released from 29 was measured.
- a laser diffraction particle size distribution analyzer (model number: SALD-3100, manufactured by Shimadzu Corporation) is used for measuring the particle size distribution of fine bubbles, and a digital dissolved oxygen meter (model number: model number: DO-5509, a mother tool product).
- the apparatus 1 As the microbubble generator 1, the apparatus 1 according to the first embodiment shown in FIGS. 1 and 2 was used, and measurement was performed by connecting the bubble generator 2, the gas supply means 3, and the shower head 5. Specifically, as the bubble generator 2, a rigid PVC pipe having an outer diameter of 18 mm, an inner diameter of 13 mm, and a wall thickness of 2.5 mm is used as the first tubular body 261, and an outer diameter of 24 mm and an inner diameter of the second tubular body 262 is used. A rigid PVC pipe having a thickness of 18 mm and a wall thickness of 3 mm was used, and the total length was 20.6 cm.
- the first reduced diameter portion 22 in the first tubular body 261 is formed by drawing the outer periphery until the minimum inner diameter of the PVC pipe is 8 mm, and the second reduced diameter portion 23 is drawn to the outer periphery of the PVC pipe. After that, the tube was cut so that an end portion having a minimum inner diameter of 6.4 mm appeared. Further, a through hole having a diameter of 2.5 mm is formed at an angular interval of about 90 degrees between the first reduced diameter portion 22 and the first gas-liquid mixing portion 24 in the circumferential direction of the outer wall of the first tubular body 261.
- the gas inlet 28 was formed by opening four.
- the gas supply means 3 is configured as shown in FIG. 1 and FIG.
- the compressor 30 is an air compressor SR-045 (product of Fujiwara Sangyo Co., Ltd., model number: SRL04SPT-01).
- the bubble generator 2 was connected via a casing 32 and a casing 34.
- the faucet 6 used a faucet of a water supply, a hose was directly connected to the faucet, and was connected to the bubble generator 2 via the adapter 4.
- the pressurized gas G was air, and the pressurized gas pressure by the compressor was 0.19 MPa. Further, the liquid L supplied from the faucet 6 to the bubble generator 2, that is, the water pressure of water was 0.15 MPa, and the flow rate of water was 20 L / min.
- Example 2 Measurement of particle size of fine bubbles contained in gas-liquid mixture (2) The same configuration and the same conditions as in Example 1 except that the fine bubble generating device 1 ′ (without the shower head 5) having a configuration in which the shower head 5 is omitted from the fine bubble generating device 1 used in the first example is used.
- the particle size distribution of the fine bubbles contained in the generated gas-liquid mixture M, the dissolved oxygen amount of the gas-liquid mixture M, and the water pressure of the gas-liquid mixture M released from the outlet 29 of the bubble generator 2 are as follows. It was measured.
- [Comparative example] 3 Measurement of particle size of fine bubbles contained in gas-liquid mixture (3)
- the bubble generator 2 and gas supply means 3 of the fine bubble generator 1 used in Example 1 were replaced with the bubble generator and gas supply means described in detail below, and a fine bubble generator (comparative product) was used. Except for the above, under the same conditions as in Example 1, the particle size distribution of the fine bubbles contained in the produced gas-liquid mixture M, the dissolved oxygen amount of the gas-liquid mixture M, and the discharge from the bubble generator are discharged. The water pressure of the gas-liquid mixture M was measured.
- the bubble generator and the gas supply means in this comparative example were configured as follows.
- Two pipes are formed coaxially so that two ends are formed and one end reduced in the liquid flow direction is arranged, and a hard PVC pipe not reduced in diameter is provided on the liquid discharge port side. Arranged.
- a gap for supplying pressurized gas G is provided between one pipe (one end with a reduced diameter) and the other pipe (the other end without a reduced diameter), and one pipe (with a reduced diameter) is provided.
- Both ends of one end) and the other pipe (the other end without a reduced diameter) were accommodated in a cylindrical casing, and both ends of the casing were fixed to the outer wall of each pipe to form an airtight state.
- Piping for supplying pressurized gas is connected to the casing.
- Pressurized gas G from the air compressor SR-045 product of Fujiwara Sangyo Co., Ltd., model number: SRL04SPT-01
- FIGS. The results of Examples 1 and 2 and the comparative example are shown in FIGS. As shown in FIG. 6 to FIG. 8, it can be seen that the configuration of the microbubble generator of the present invention provides gas-liquid mixed water containing a large amount of microbubbles at the nano-order level (bubble diameter is less than 1 ⁇ m). It was. Specifically, the integrated value of the gas-liquid mixed water obtained by the fine bubble generator of Example 1 having a bubble diameter of less than 1 ⁇ m is about 90%, and the gas-liquid mixture obtained in Example 2 is used. The integrated value of water having a bubble diameter of less than 1 ⁇ m was about 58%.
- the integrated value of those having a bubble diameter of less than 1 ⁇ m was as low as about 10%. From this, by using the configuration of the microbubble generator of the present invention, it is possible to obtain gas-liquid mixed water with a high ratio of microbubbles at the nano-order level, and by including a shower head. It was found that gas-liquid mixed water having a higher ratio of nano-order fine bubbles can be obtained. Further, as shown in Table 1 below, according to the fine bubble generating device of the present invention, it was found that the gas-liquid mixed water can be discharged out of the device while maintaining the water pressure of the supplied water substantially or with the water pressure increased. .
- the dissolved oxygen amount of the gas-liquid mixed water obtained by the fine bubble generating apparatus of the present invention is higher than the dissolved oxygen amount of the feed water, and the measurement result of the particle size distribution indicates that the abundance ratio of nano-order level fine bubbles is present. Since it is high, it was estimated that the fine bubble density
- the configuration (Example 1) including the shower head in the micro-bubble generator further increases the dissolved oxygen concentration and increases the existence ratio of nano-order level micro-bubbles. It was found that gas-liquid mixed water having a high concentration can be obtained.
- Example 3 4). Examination of hair condition when gas-liquid mixed water is used for hair washing etc.
- the hair condition when gas-liquid mixed water M obtained by the fine bubble generator of the present invention is used for hair washing etc. was examined. After fixing one human hair (healthy, one that has not been dyed or decolored so far) to the slide and placing the cover glass, the gas-liquid mixture obtained in Example 1 from the side of the cover glass Water was added and the hair was soaked with gas-liquid mixed water. The hair diameter was measured with a microscope for 20 minutes. Moreover, it replaced with the gas-liquid mixed water of Example 1, and the same test was done using the tap water. The results are shown in the graph of FIG.
- the gas-liquid mixed water produced by the microbubble generator of the present invention is used for washing the hair, it is possible to use the hair dye or the treatment agent after removing the dirt on the hair or scalp.
- the effect of the agent and the like can be obtained stably.
- the fine bubble generating apparatus is used for producing a gas-liquid mixture containing fine bubbles, and can be suitably used in the fields of beauty and health, agriculture, and the like.
- Fine bubble generator 2 20 Bubble generator 21, 210 Flow path 22, 220 First reduced diameter portion 22d, 220d Minimum inner diameter 23, 230 Second reduced diameter portion 23d, first reduced diameter portion 230d Minimum inner diameter of second reduced diameter portion 24, 240 First gas-liquid mixing portion 24d, 240d Inner diameter of first gas-liquid mixing portion 25, 250 Second gas-liquid mixing portion 25d, 250d Second gas-liquid Inner diameter of mixing portion 26, 260 Tubular body 261 First tubular body 262 Second tubular body 27 Liquid inlet 28 Gas inlet (through hole) 29 Discharge port 3 Gas supply means 30 Compressor 31 Piping 32 Connection member 33 Gas supply port 34 Casing 35 Nut 36 Gap 4 Adapter 5 shower head 6 Faucet F Flow direction G Pressurized gas L Liquid M Gas liquid mixture
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Abstract
Description
(1)微細気泡濃度が高く、気泡径が数十マイクロメートル以下の小さい気泡径の微細気泡を発生させることができる。
(2)排出口から放出される微細気泡を有する気液混合液の液圧を高く保つことができるため、例えば、上水道の配水管等から供給される水圧で装置内に水を導入しても、その水圧を保ったまま、又はその水圧をより高めた気液混合液として装置外に放出することができる。
(3)また、下流側の縮径部の最小内径を上流側のものよりも小さく形成することにより、より小さい気泡径を有する微細気泡を発生させることができる。
(4)また、下流側の気液混合部の内径を上流側のものよりも大きく形成することにより、気泡の圧壊収縮を促進させ、より微細化したナノオーダーレベルの気泡径を有する微細気泡を発生させることができる。
(5)また、最も上流側に設けられた縮径部と縮径部に連続する気液混合部、及び気液混合部に連続する縮径部に対応する部分の管状体を一体的にかつ同軸に形成することにより、耐圧性が高められ、安定的に使用できる装置を得ることができる。
1.気液混合液に含まれる微細気泡の粒子径等の測定(1)
微細気泡発生装置1を用いて気液混合液Mを生成させ、気液混合液M中に含まれる微細気泡の粒子径分布、気液混合液Mの溶存酸素量及び気泡生成器2の排出口29から放出される気液混合液Mの水圧を測定した。なお、微細気泡の粒子径分布の測定には、レーザ回折式粒度分布測定装置(型番:SALD-3100、株式会社島津製作所製品)を用い、溶存酸素量の測定にはデジタル溶存酸素計(型番:DO-5509、株式会社マザーツール製品)を用いた。
2.気液混合液に含まれる微細気泡の粒子径等の測定(2)
実施例1で用いた微細気泡発生装置1から、シャワーヘッド5を省いた構成の微細気泡発生装置1´(シャワーヘッド5無し)を用いた以外は、実施例1と同様の構成及び同様の条件で、生成した気液混合液M中に含まれる微細気泡の粒子径分布、気液混合液Mの溶存酸素量及び気泡生成器2の排出口29から放出される気液混合液Mの水圧を測定した。
3.気液混合液に含まれる微細気泡の粒子径等の測定(3)
実施例1で用いた微細気泡発生装置1の気泡生成器2及び気体供給手段3を、以下に詳述する気泡生成器及び気体供給手段に替えた構成の微細気泡発生装置(比較品)とした以外は、実施例1と同様の条件で、生成した気液混合液M中に含まれる微細気泡の粒子径分布、気液混合液Mの溶存酸素量及び気泡生成器の排出口から放出される気液混合液Mの水圧を測定した。
4.気液混合水を毛髪洗浄等に用いた際の毛髪状態の検討
本発明の微細気泡発生装置により得られた気液混合水Mを毛髪洗浄等に用いた際の毛髪状態を調べた。人の毛髪(健康で、これまで染色処理や脱色処理等していないもの)1本をプレパラートに固定し、カバーガラスをのせた後、カバーガラスの脇から実施例1で得られた気液混合水を加え、毛髪を気液混合水で浸した。顕微鏡にて20分間に亘り、毛髪の毛径を測定した。また、実施例1の気液混合水に替えて水道水を用いて同様の試験を行った。結果を図9のグラフに示す。
2、20 気泡生成器
21、210 流路
22、220 第1の縮径部
22d、220d 第1の縮径部の最小内径
23、230 第2の縮径部
23d、230d 第2の縮径部の最小内径
24、240 第1の気液混合部
24d、240d 第1の気液混合部の内径
25、250 第2の気液混合部
25d、250d 第2の気液混合部の内径
26、260 管状体
261 第1の管状体
262 第2の管状体
27 液体導入口
28 気体導入口(貫通孔)
29 排出口
3 気体供給手段
30 圧縮機
31 配管
32 接続部材
33 気体供給口
34 ケーシング
35 ナット
36 間隙
4 アダプター
5 シャワーヘッド
6 水栓
F 流れ方向
G 加圧気体
L 液体
M 気液混合液
Claims (6)
- 液体供給源から連続して供給される液体と、気体供給手段から供給される気体とを混合して微細気泡を発生させ、前記微細気泡と前記液体とが混合した気液混合液を排出する微細気泡発生装置であって、
前記液体の流路を内部に有する管状体、前記液体を前記流路に導入する液体導入口、前記気体を前記流路に導入する気体導入口及び前記気液混合液を前記流路から排出する排出口を有する気泡生成器と、
前記気体を加圧する圧縮機及び前記圧縮機によって加圧された気体を前記気泡生成器に供給する気体供給口を有する気体供給手段と、を備え、
前記気泡生成器の前記流路は前記液体導入口から前記排出口に至るまで略同軸線状に延びており、前記流路には前記液体の流れる方向に向かって内径を縮小させた縮径部が複数設けられ、各々の縮径部の下流側には、各縮径部における最小内径よりも大きい内径を有する気液混合部が夫々連続して設けられ、
前記気泡生成器の前記気体導入口は、前記管状体の外壁の周方向に沿って配設された複数の貫通孔として、前記流路における最も上流側に設けられた前記縮径部の近傍に設けられ、該気体導入口は、前記気体供給手段の前記気体供給口と連通していることを特徴とする微細気泡発生装置。 - 前記気泡生成器の前記流路において、最も上流側に設けられた前記縮径部と該縮径部に連続する気液混合部、及び該気液混合部に連続する縮径部に対応する部分の管状体が、一体的にかつ同軸に形成されていることを特徴とする請求項1に記載の微細気泡発生装置。
- 前記気泡生成器の前記複数の縮径部は、上流側に配置された縮径部の最小内径よりも下流側に配置された縮径部の最小内径の方が小さくなるように形成されていることを特徴とする請求項1又は2に記載の微細気泡発生装置。
- 前記気泡生成器の前記複数の気液混合部は、上流側に配置された気液混合部の内径よりも下流側に配置された気液混合部の内径の方が大きくなるように形成されていることを特徴とする請求項3に記載の微細気泡発生装置。
- 前記気泡生成器の前記流路には、上流側から下流側に向かって、第1の縮径部、該第1の縮径部に連続する第1の気液混合部、該第1の気液混合部と連続する第2の縮径部、及び該第2の縮径部に連続する第2の気液混合部が設けられ、
前記気泡生成器の前記気体導入口は、前記第1の縮径部の近傍に設けられていることを特徴とする請求項1~4のいずれか1項に記載の微細気泡発生装置。 - さらに、シャワーヘッドを備え、該シャワーヘッドは前記気泡生成器の前記排出口に接続されたホースを介して連結されていることを特徴とする請求項1~5のいずれか1項に記載の微細気泡発生装置。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112121655A (zh) * | 2020-10-11 | 2020-12-25 | 杨启航 | 一种双止回式多孔混合装置 |
WO2021215191A1 (ja) * | 2020-04-21 | 2021-10-28 | 国立大学法人東京工業大学 | 混合ノズル及び混合ノズルを用いる汚染気体浄化装置 |
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KR102306821B1 (ko) * | 2021-01-19 | 2021-09-30 | (주)한국에프에이산업 | 마이크로 버블 및 나노 버블 발생 구조를 포함하는 절삭유 노즐 |
CN114832956B (zh) * | 2022-05-12 | 2023-03-21 | 东莞市适意洁具有限公司 | 一种节能自动收缩花洒 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009082903A (ja) * | 2007-09-16 | 2009-04-23 | Sgk Kk | マイクロバブル生成装置。 |
JP2011206689A (ja) * | 2010-03-30 | 2011-10-20 | Mie Univ | 微細気泡形成装置。 |
JP2015174055A (ja) * | 2014-03-17 | 2015-10-05 | 株式会社シバタ | ガス溶解装置 |
KR20170071933A (ko) * | 2015-12-16 | 2017-06-26 | 인천대학교 산학협력단 | 마이크로 버블 발생장치 |
KR20180036259A (ko) * | 2016-09-30 | 2018-04-09 | 인천대학교 산학협력단 | 마이크로 버블 발생장치 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3481113A (en) * | 1967-12-18 | 1969-12-02 | Gerald E Burnham Sr | Apparatus and method for the degassification of drilling muds |
CA1051063A (en) * | 1976-05-27 | 1979-03-20 | Mitsubishi Precision Co. | Method of and apparatus for generating mixed and atomized fluids |
US20040251566A1 (en) * | 2003-06-13 | 2004-12-16 | Kozyuk Oleg V. | Device and method for generating microbubbles in a liquid using hydrodynamic cavitation |
JP4194522B2 (ja) | 2004-04-19 | 2008-12-10 | 協和工業株式会社 | 気液混合気泡発生装置 |
JP2012040448A (ja) | 2008-11-14 | 2012-03-01 | Yasutaka Sakamoto | マイクロバブル発生装置 |
CN101462096B (zh) * | 2008-12-01 | 2011-11-09 | 厦门松霖科技有限公司 | 出水装置的洗涤液供给结构 |
JP5912347B2 (ja) * | 2011-09-01 | 2016-04-27 | 瑞麟 林 | 推力増進装置 |
JP6118544B2 (ja) * | 2012-11-29 | 2017-04-19 | Idec株式会社 | 微細気泡生成ノズルおよび微細気泡生成装置 |
KR101431584B1 (ko) * | 2012-12-18 | 2014-08-20 | 주식회사 엘크린시스템 | 다용도 초미세기포 발생기 |
JP5737363B2 (ja) * | 2013-10-29 | 2015-06-17 | 三菱電機株式会社 | 気液混合装置および風呂給湯装置 |
WO2015064159A1 (ja) * | 2013-10-31 | 2015-05-07 | 日之出産業株式会社 | マイクロバブル形成方法及びマイクロバブル形成装置 |
JP6169749B1 (ja) * | 2016-04-12 | 2017-07-26 | 大生工業株式会社 | 微細気泡生成装置 |
CN205850620U (zh) * | 2016-08-15 | 2017-01-04 | 中石化炼化工程(集团)股份有限公司 | 微气泡发生器 |
-
2019
- 2019-04-25 US US17/045,589 patent/US11772057B2/en active Active
- 2019-04-25 JP JP2020517059A patent/JP6964363B2/ja active Active
- 2019-04-25 WO PCT/JP2019/017592 patent/WO2019212028A1/ja active Application Filing
- 2019-04-25 KR KR1020207026818A patent/KR102494395B1/ko active IP Right Grant
- 2019-04-25 CN CN201980027162.5A patent/CN112041054A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009082903A (ja) * | 2007-09-16 | 2009-04-23 | Sgk Kk | マイクロバブル生成装置。 |
JP2011206689A (ja) * | 2010-03-30 | 2011-10-20 | Mie Univ | 微細気泡形成装置。 |
JP2015174055A (ja) * | 2014-03-17 | 2015-10-05 | 株式会社シバタ | ガス溶解装置 |
KR20170071933A (ko) * | 2015-12-16 | 2017-06-26 | 인천대학교 산학협력단 | 마이크로 버블 발생장치 |
KR20180036259A (ko) * | 2016-09-30 | 2018-04-09 | 인천대학교 산학협력단 | 마이크로 버블 발생장치 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021215191A1 (ja) * | 2020-04-21 | 2021-10-28 | 国立大学法人東京工業大学 | 混合ノズル及び混合ノズルを用いる汚染気体浄化装置 |
JP2021171679A (ja) * | 2020-04-21 | 2021-11-01 | 国立大学法人東京工業大学 | 混合ノズル及び混合ノズルを用いる汚染気体浄化装置 |
CN112121655A (zh) * | 2020-10-11 | 2020-12-25 | 杨启航 | 一种双止回式多孔混合装置 |
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