JP5785158B2 - Microbubble generator - Google Patents

Description

The present invention relates to a fine-bubble onset NamaSo location capable of supplying the liquid of fine air bubbles to the treated liquid.

  Conventional microbubble generators used to dissolve oxygen in the air in water and remove unnecessary gases and volatile substances dissolved in water have various structures and functions. As a fine bubble generator related to the present invention, a liquid is fed into the cylindrical container along the circumferential tangential direction of the cylindrical container, and is formed in the cylindrical container. Some generate fine bubbles by a gas-liquid swirl flow (see, for example, Patent Documents 1 to 4).

JP 2009-142750 A JP 2008-161819 A JP 2008-161822 A JP 2009-274045 A

  In the “fine bubble generator” described in Patent Document 1, the same amount of fine bubble liquid as that injected from the two injection ports (main injection port and sub-injection port) into the generating cylinder is discharged from the discharge port. Therefore, if the amount of bubble liquid supplied from the main injection port and the sub-injection port to the generating cylinder is increased, the residence time of the bubble liquid in the generating cylinder decreases, and the amount of fine bubbles generated may decrease. is there.

  Further, in the “gas dissolver” described in the cited documents 2 and 3, as a means for promoting gas dissolution, a plurality of protruding members are provided in the cylindrical casing, or a flow path forming member is disposed. Therefore, the pressure loss of the fluid flowing in the cylindrical casing is large. Further, since the projecting member and the flow path forming member are present in the cylindrical casing, the flow path is narrowed, so there is a high possibility that the foreign matter contained in the fluid is clogged.

  Also in the “micro / nano bubble water generation device” described in the cited document 4, since the spiral member is arranged inside the pipe, the pressure loss of the water flow flowing in the pipe is large as described above, and the foreign matters contained in the water flow are clogged. The possibility is high.

An object of the present invention is to provide is to provide a fine bubble onset NamaSo location which can supply a large amount of fine air bubbles in the fluid efficiently and stably.

The fine bubble generating apparatus of the present invention includes a cylindrical casing having a virtual center axis that is curved, spiral, or part of a polygon, a partition wall that closes one end of the cylindrical casing, and the cylindrical casing. And provided in communication with the cylindrical casing for introducing fluid into the cylindrical casing along a direction that forms a twisted position with respect to the virtual center axis. Each of the discharge ports face each other in two fine bubble generators provided with a gas introduction path that communicates with the cylindrical casing in order to introduce gas into the cylindrical casing. It is characterized by being arranged as described above .

  If the fine bubble generator having such a configuration is immersed in the liquid to be treated and a mixed fluid of gas and liquid is supplied into the cylindrical casing via the fluid introduction path, the mixed fluid is the cylinder. A gas-liquid swirl that rotates in a certain direction around the virtual central axis in the cylindrical casing because it flows into the cylindrical casing along a direction that forms a twisted position with respect to the virtual central axis of the cylindrical casing A flow is formed, and a negative pressure cavity is generated in the vicinity of the imaginary central axis that is the central portion.

  Since this negative pressure cavity is torn off by the rotational force of the gas-liquid swirl flow, the gas contained therein becomes fine bubbles and is discharged from the discharge port at the other end of the cylindrical casing together with the liquid. A fluid containing a large amount of fine bubbles can be supplied. Moreover, since it is not necessary to arrange a member for forming a gas-liquid swirl flow in the cylindrical casing, the pressure loss is small and the possibility of clogging with foreign substances is low. For this reason, the fluid containing fine bubbles can be supplied efficiently and stably.

  Furthermore, the cylindrical casing whose virtual center axis forms a curved shape, a spiral, or a part of a polygon has a smaller occupied space than a straight cylindrical casing having the same length in the virtual center axis direction. Since it can achieve, enlargement can be avoided.

  The reason why a larger number of fine bubbles are generated in a cylindrical casing whose virtual center axis is curved, spiral, or part of a polygonal shape than in a cylindrical casing whose virtual center axis is linear. There are many unclear points about, but at present, it is estimated as follows. That is, since the negative pressure cavity portion generated in the cylindrical casing having a straight virtual center axis keeps a single continuous shape, the portion to be shredded is limited to only the end portion of the negative pressure cavity portion. On the other hand, the negative pressure cavity generated in the cylindrical casing whose virtual center axis forms a curved, spiral or polygonal shape maintains a continuous linear shape in the cylindrical casing. Since it cannot be performed, it is presumed that it is shredded so as to be divided at a plurality of places, and fine bubbles are formed at each of the divided places.

Further , by providing a gas introduction path that communicates with the cylindrical casing to introduce gas into the cylindrical casing, a mixed fluid of gas and liquid is introduced into the cylindrical casing via the fluid introduction path. Since the gas can be supplied into the cylindrical casing via the gas introduction path while supplying the gas, the amount of fine bubbles generated in the cylindrical casing can be increased.

  In addition, the liquid and the gas are separately supplied by supplying the gas into the cylindrical casing via the gas introduction path while supplying only the liquid into the cylindrical casing via the fluid introduction path. In addition, since it can be supplied into the cylindrical casing, it is also possible to independently control the amount of each supply, improving usability.

  On the other hand, an opening of the gas introduction path serving as a gas introduction port into the cylindrical casing can be arranged in the cylindrical casing. With such a configuration, it is possible to supply gas to an arbitrary region in the cylindrical casing. Therefore, an opening of the gas introduction path is provided in a region where fine bubbles are easily formed in the cylindrical casing. By arranging, the generation amount of fine bubbles can be increased.

  In addition, since the material of the microbubble generator mentioned above is not limited, it can be formed using a metal, ceramics, a synthetic resin, a natural material, a carbon material, etc., or the material which combined these. In addition, as the liquid to be treated for supplying fine bubbles using the fine bubble generator, fresh water, salt water and the like are assumed, but not limited thereto, alcohol, petroleum, vegetable oil, animal oil, chemical synthesis or It can also be used as means for supplying fine bubbles to various liquids produced by natural brewing. Furthermore, since the gas supplied to the fine bubble generator for generating fine bubbles is not limited, air, oxygen, carbon dioxide, ozone, or various gases according to various applications can be used.

  In order to introduce fluid into the cylindrical casing, a sub-fluid introduction path communicating with the cylindrical casing may be provided on the peripheral wall of the cylindrical casing. With such a configuration, by introducing a fluid (either gas or liquid or a mixed fluid of gas and liquid) from the auxiliary fluid introduction path into the cylindrical casing, only from the fluid introduction path. Since a larger amount of fluid can be introduced into the cylindrical casing than when fluid is introduced, a larger amount of fluid containing fine bubbles can be supplied.

In addition, the fine bubble generating device of the present invention, which uses a micro bubble generator described above, by arranging such two of the fine-bubble generator, to each other each of the discharge port facing formed It is characterized by that.

  With such a configuration, since the fluid containing a mixture of micro bubbles discharged from the discharge ports of the two micro-bubble generators interferes with each other while rotating, the micro-bubbles are crushed and the number thereof increases. Thus, it is possible to efficiently and stably supply a fluid containing a large amount of fine bubbles while avoiding an increase in the size of the apparatus.

The present invention, a large amount of fine air bubbles in the fluid, can be efficiently and stably supply capable of providing microbubbles onset NamaSo location.

It is a figure which shows the microbubble apparatus which is 1st Embodiment of this invention. It is sectional drawing in the AA of FIG. It is sectional drawing in the BB line of FIG. Which is another embodiment of that illustrates the fine bubble generator. Which is another embodiment of that illustrates the fine bubble generator. It is a figure which shows the microbubble generator which is 2nd Embodiment of this invention. It is a figure which shows the microbubble generator which is 3rd Embodiment of this invention. Which is another embodiment of that illustrates the fine bubble generator. Which is another embodiment of that illustrates the fine bubble generator. Which is another embodiment of that illustrates the fine bubble generator. Which is another embodiment of that illustrates the fine bubble generator. Which is another embodiment of that illustrates the fine bubble generator. It is a figure which shows the fine bubble generator which is other embodiment of this invention. It is the figure which looked at the fine bubble generator shown in FIG. 13 from the arrow C direction.

  As shown in FIG. 1, the microbubble generator 100 generates two microbubbles including casings 11R and 11L each having an arcuate shape (semicircular shape) in which each virtual center axis 10Lc and 10Rc is a kind of curve. The containers 10L and 10R are arranged so that the discharge ports 12L and 12R face each other, and the casings 11R and 11L are connected by a band plate-like connecting member 11a.

  Here, the structure and function of the fine bubble generators 10R and 10L will be described. As shown in FIG. 1, since the two fine bubble generators 10R and 10L have a mirror-symmetric structure with respect to the XX line, the components common to the fine bubble generators 10R and 10L are fine bubbles. The same reference numerals as those of the corresponding parts in the generator 10R are attached and the description thereof is omitted.

  As shown in FIGS. 2 and 3, the fine bubble generators 10R and 10L include cylindrical casings 11R and 11L in which virtual center axes 10Rc and 10Lc form an arc shape, and a partition that closes one end of the casings 11R and 11L. 14 and casings 11R and 11L along the direction in which the discharge ports 12R and 12L provided in the partition wall 15 closing the other ends of the casings 11R and 11L and the virtual center axes 10Rc and 10Lc are twisted. A liquid introduction path 16 provided in communication with the casings 11R, 11L for introducing the liquid W into the interior; a gas introduction path 17 communicated with the casings 11R, 11L for introducing the gas G into the casings 11R, 11L; It has.

  The liquid introduction path 16 is opened through the peripheral walls 18 of the casings 11 </ b> R and 11 </ b> L and communicates with a liquid supply pipe 19 connected to the outer peripheral side of the peripheral wall 18. The gas introduction path 17 is opened through the central portion of the partition wall 14 that closes one end of the casing 11R, 11L, and communicates with the air supply pipe 13 connected to the outside of the partition wall 14. As a result, arc-shaped (semicircular) gas-liquid swirl chambers 11Rs and 11Ls are formed in the casings 11R and 11L, respectively.

  When the fine bubble generator 100 is used, the fine bubble generator 100 including the two fine bubble generators 10L and 10R is immersed in the liquid to be processed, and the liquid supply pipe 19 connected to a pump (not shown) is connected. The liquid W is supplied into the casings 11R and 11L via the liquid introduction path 16, and the gas G is supplied from the supply pipe 13 via the gas introduction path 17 into the casings 11R and 11L. The gas supply method from the air supply pipe 13 into the casings 11R and 11L is not limited, so that a negative pressure generated in the gas-liquid swirl chambers 11Rs and 11Ls by a gas pump (not shown) or in a gas-liquid swirl chamber 11Rs depending on the application and use conditions. A natural air supply method using pressure can be adopted.

  As shown in FIGS. 2 and 3, the liquid W supplied via the liquid introduction path 16 has a casing 11 </ b> R, along a direction that forms a twisted position with respect to the virtual central axes 10 </ b> Rc and 10 </ b> Lc of the casings 11 </ b> R and 11 </ b> L. Since the gas flows into 11L, gas-liquid swirl flows RV and LV that flow toward the discharge ports 12R and 12L are formed in the casings 11R and 11L while rotating around the virtual central axes 10Rc and 10Lc in a certain direction, respectively. In addition, a negative pressure cavity V is generated in the vicinity of the imaginary central axis 10Rc that is the central portion.

  Then, the gas contained in the negative pressure cavity V is shredded by the rotational force of the gas-liquid swirl flows RV and LV to become fine bubbles MB, and together with the liquid W from the discharge ports 12R and 12L of the casings 11R and 11L, respectively. Since the liquid is discharged, a large amount of the liquid W mixed with the fine bubbles MB can be supplied into the liquid to be processed. Further, since the insides of the cylindrical casings 11R and 11L are hollow, the pressure loss of the gas-liquid swirl flows RV and LV flowing in the gas-liquid swirl chambers 11Rs and 11Ls is small, and the possibility of clogging with foreign substances is low. For this reason, the liquid W mixed with the fine bubbles MB can be supplied efficiently and stably.

  The inner peripheral surfaces of the casings 11R and 11L constituting the fine bubble generating device 100 of the present embodiment have a smooth curved surface shape. However, the present invention is not limited to this, and the gas-liquid swirl flow RV, Spiral grooves, ribs or ridges along the LV flow direction may be formed. In the present embodiment, the inner circumferential cross-sectional shape of the casings 11R and 11L (the shape of the plane perpendicular to the virtual central axes 10Rc and 10Lc) is circular, but is not limited to this. A circular shape, a flat circular shape, or a polygonal shape can also be used.

  In the microbubble generator 100, in order to introduce the gas G into the casings 11R and 11L, a gas introduction path 17 communicating with the casings 11R and 11L is provided separately from the liquid introduction path 16. Accordingly, the gas G can be supplied into the casings 11R and 11L via the gas introduction path 17 while supplying the liquid W into the casings 11R and 11L via the liquid introduction path 16. In this way, since the liquid W and the gas G can be separately supplied into the casings 11R and 11L, an adjustment valve (not shown) provided on the upstream side of the liquid supply pipe 19 and the air supply pipe 13 is operated. By doing so, it is possible to control each supply amount independently, and it is easy to use. Further, the supply amount of the liquid W through the supply pipe 19 and the supply amount of the gas G through the supply pipe 13 can be adjusted to increase or decrease independently for each of the casings 11R and 11L, or the supply can be stopped. It can also be.

  Further, as shown in FIG. 1, a gas-liquid swirl flow RV that rotates and flows in a gas-liquid swirl chamber 11Rs of the casing 11R of the fine bubble generator 10R so as to draw a right screw from the partition 14 side toward the partition 15 is drawn. In the gas-liquid swirl chamber 11Ls of the casing 11L of the fine bubble generator 10L, a gas-liquid swirl flow LV that rotates and flows in a left-handed manner from the partition 14 side toward the partition 15 is formed. Accordingly, the liquid W mixed with the fine bubbles MB discharged from the discharge ports 12R and 12L arranged to face each other on the same axis is diffused into the liquid to be processed while rotating in the same direction.

  As described above, the fluids mixed with the microbubbles MB discharged from the discharge ports 12R and 12L of the two microbubble generators 10R and 10L interfere with each other while rotating in the same direction, so that the microbubbles MB are crushed. As the number of the fluids increases, the fluid W containing a large amount of fine bubbles MB can be supplied efficiently and stably while avoiding an increase in the size of the apparatus. In the present embodiment, the discharge ports 12R and 12L of the two fine bubble generators 10R and 10L are arranged so as to face each other on the same axis. However, the present invention is not limited to this, and the virtual central axis of the discharge port 12R and It is desirable that the angle formed by the virtual central axis of the discharge port 12L is within a range of about 180 ± 5 degrees.

  In the present embodiment, the gas introduction path 17 and the liquid introduction path 16 for independently introducing the liquid W and the gas G into the casings 11R and 11L of the two fine bubble generators 10R and 10L are provided. Since it is not limited to this, the gas introduction path 17 may be closed, and a mixed fluid of the liquid W and the gas G may be introduced from the liquid introduction path 16 into the casings 11R and 11L. In this case, the liquid introduction path 16 functions as a fluid introduction path.

  The microbubble generator 100 includes two microbubble generators 10R and 10L. However, the microbubble generators 10R and 10L alone generate microbubbles MB, and the microbubbles MB are mixed from the discharge ports 12R and 12L. Fluid can be discharged. Further, the casings 11R and 11L constituting the fine bubble generators 10R and 10L have a shape in which the respective virtual central axes 10Rc and 10Lc form an arc shape (semicircular shape). (For example, an elliptic arc curve shape, a long arc curve shape, a waveform curve shape, a spiral curve shape, or the like) or a shape that forms a part of a polygon.

Next, FIG. 4, on the basis of FIG. 5, another embodiment is a fine-bubble generator 20rR of that for 20lL be described. In the fine bubble generators 20rR and 20lL shown in FIGS. 4 and 5, the same parts as those of the fine bubble generator 10R described above are denoted by the same reference numerals as those in FIGS. To do.

  A microbubble generator 20rR shown in FIG. 4 has a cylindrical casing 21R whose virtual center axis 20Rc forms a right-handed spiral, a partition wall 24 that closes one end of the casing 21R, and a second end that closes the other end of the casing 21R. In order to introduce the liquid W into the casing 21R along the direction of twisting with respect to the imaginary center axis 20Rc and the discharge port 22R provided in the partition wall 25, on the outer peripheral side of the peripheral wall 28 near the partition wall 24 of the casing 21R. The connected liquid supply pipe 19 and the air supply pipe 13 connected to the partition wall 24 of the casing 21R for introducing the gas G into the casing 21R are provided.

  When the liquid W and the gas G are supplied into the casing 21R via the liquid supply pipe 19 and the air supply pipe 13, it rotates so as to draw a right screw around the virtual center axis 20Rc in the gas-liquid swirl chamber 21Rs of the casing 21R. A gas-liquid swirl flow RV that flows in the gas-liquid swirl chamber 21Rs toward the discharge port 22R is formed. That is, the gas-liquid swirl flow RV flows in the gas-liquid swirl chamber 21Rs while drawing a right-hand thread, and flows in the casing 21R so as to draw a right-handed spiral as a whole, and is discharged from the discharge port 22R. .

  A microbubble generator 20lL shown in FIG. 5 includes a cylindrical casing 21L whose virtual center axis 20Lc forms a left spiral, a partition wall 24 that closes one end of the casing 21L, and a partition wall that closes the other end of the casing 21L. 25 is connected to the outer peripheral side of the peripheral wall 28 near the partition wall 24 of the casing 21L in order to introduce the liquid W into the casing 21L along the direction that forms a twisted position with respect to the virtual center axis 20Lc. The liquid supply pipe 19 is provided, and the air supply pipe 13 connected to the partition wall 24 of the casing 21L for introducing the gas G into the casing 21L.

  When the liquid W and the gas G are supplied into the casing 21L via the liquid supply pipe 19 and the air supply pipe 13, it rotates so as to draw a left-hand screw around the virtual center axis 20Lc in the gas-liquid swirl chamber 21Ls of the casing 21L. A gas-liquid swirl flow LV that flows in the gas-liquid swirl chamber 21Ls toward the discharge port 22L is formed. That is, the gas-liquid swirl flow LV flows in the gas-liquid swirl chamber 21Ls while drawing a left-hand screw, and flows in the casing 21L so as to draw a left-handed screw spiral as a whole, and is discharged from the discharge port 22L. The

  In the fine bubble generators 20rR and 20lL, since the casings 21R and 21L are spiral, gas-liquid swirl flows RV and LV having a long residence time are formed in the casings 21R and 21L. As a result of the formation of a large amount of fine bubbles in the liquid W flowing through the liquid W, a liquid containing a large amount of fine bubbles can be discharged from the discharge ports 22R and 22L. Further, since the spiral casings 21R and 21L can secure relatively long gas-liquid swirl chambers 21Rs and 21Ls while suppressing an increase in occupied space, it is possible to avoid an increase in the size of the apparatus.

  Since the rotation direction of the gas-liquid swirl flow in the cylindrical casing and the spiral direction of the casing are not limited to those shown in FIGS. 4 and 5, a left-screw direction gas-liquid swirl flow is provided in the right spiral casing. It is also possible to adopt a method of forming a gas-liquid swirling flow in the right screw direction in a left spiral casing. Further, like a double filament of an incandescent lamp, a cylindrical casing having a spiral center axis can be formed into a spiral shape as a whole.

  The fine bubble generator 200 shown in FIG. 6 is formed by arranging fine bubble generators 20rR and 20lR so that the discharge ports 22R and 22R face each other on the same axis. Although the fine bubble generator 20rR is the same as that shown in FIG. 4, the fine bubble generator 20lR has a structure in which a gas-liquid swirl flow LV in the left-handed screw direction is formed in the right spiral casing 21R.

  With such a configuration, the fine bubbles MB mixed fluids discharged from the discharge ports 22R and 22R of the two fine bubble generators 20rR and 20lR interfere with each other while rotating in the same direction. Since the number of MBs increases and the number of MBs increases, it is possible to efficiently and stably supply a large amount of fluid W mixed with fine bubbles MB while avoiding an increase in the size of the apparatus.

  The fine bubble generator 300 shown in FIG. 7 is arranged such that the fine bubble generator 20rR shown in FIG. 4 and the fine bubble generator 20lL shown in FIG. 5 are coaxially opposed to the discharge ports 22R and 22L. Is formed. With such a configuration, the microbubbles MB discharged from the discharge ports 22R and 22L of the two microbubble generators 20rR and 20LL interfere with each other while rotating in the same direction, thereby collapsing the microbubbles MB. Since the quantity increases and the quantity increases, the fluid W containing a large amount of fine bubbles MB can be supplied efficiently and stably, and the enlargement of the apparatus can be avoided.

  6 includes two microbubble generators 20rR and 20lR, and the microbubble generator 300 illustrated in FIG. 7 includes two microbubble generators 20rR and 20lL. Since the invention is not limited to these, two fine bubble generators having a cylindrical casing in which a virtual central axis forms a spiral shape can be arranged so as to draw a double spiral.

  The microbubble generators 10L, 10R, 20rR, 20lL, and 20lR shown in FIGS. 1 to 7 are respectively formed of cylindrical casings 11R, 11L, 21R, and 21L. However, the present invention is not limited to these, for example, The casing may be formed of a casing having an inner peripheral surface of a polygonal cylinder shape, an elliptical cylinder shape, a long cylindrical shape, or a flat cylindrical shape.

  Next, microbubble generators 30L and 30R, which are other embodiments, will be described with reference to FIGS.

  A microbubble generator 30L shown in FIG. 8 includes a cylindrical casing 31L in which a virtual center axis 30Lc forms an arc shape (a quarter circle), a partition wall 34 that closes one end of the casing 31L, and the other end of the casing 31L. 32 L provided in communication with the casing 31 L to introduce the liquid W into the casing 31 L along the direction of twisting with respect to the virtual center axis 30 Lc and the discharge port 32 L opened in the partition wall 35 that closes the portion. A liquid introduction path 36 and a gas introduction path 37 communicating with the casing 31L for introducing the gas G into the casing 31L are provided.

  The liquid introduction path 36 is opened through the peripheral wall 38 of the casing 31 </ b> L and communicates with the liquid supply pipe 19 connected to the outer peripheral side of the peripheral wall 38. The gas introduction path 37 is opened through the central portion of the partition wall 34 that closes one end portion of the casing 31 </ b> L, and communicates with the air supply pipe 13 connected to the outside of the partition wall 34. As a result, a quarter-circular gas-liquid swirl chamber 31Ls is formed in the casing 31L.

  The fine bubble generator 31L is immersed in the liquid to be treated, and the liquid W is supplied from the liquid supply pipe 19 connected to a pump (not shown) into the casing 31L via the liquid introduction path 36 and supplied. Gas G is supplied from the trachea 13 through the gas introduction path 37 into the casing 31L. As a result, a gas-liquid swirl flow LV that flows toward the discharge port 32L while rotating leftward toward the partition wall 35 around the virtual center axis 30Lc is formed in the casing 31L, and at the center portion thereof. A negative pressure cavity (not shown) is generated in the vicinity of a virtual center axis 30Lc.

  The gas contained in the negative pressure cavity is finely bubbled MB while being finely shredded by the rotational force of the gas-liquid swirl flow LV, and is discharged together with the liquid W from the discharge port 32L of the casing 31L. The liquid W mixed with the bubbles MB can be supplied into the liquid to be processed.

  On the other hand, the fine bubble generator 30R shown in FIG. 9 includes a cylindrical casing 31R in which the virtual center axis 30Rc forms an arc shape (¼ circle shape), a partition wall 34 that closes one end of the casing 31R, and a casing 31R. In order to introduce the liquid W into the casing 31R along the direction of the twisted position with respect to the virtual center axis 30Rc and the discharge port 32R opened in the partition wall 35 that closes the other end of the casing, it communicates with the casing 31R. A liquid introduction path 36 provided, and a gas introduction path 37 communicating with the casing 31R for introducing the gas G into the casing 31R are provided.

  The fine bubble generator 30R is immersed in the liquid to be processed, and the liquid W is supplied from the liquid supply pipe 19 connected to a pump (not shown) into the casing 31R via the liquid introduction path 36 and supplied. When the gas G is supplied from the trachea 13 through the gas introduction path 37 into the casing 31L, the gas G flows into the casing 31R toward the discharge port 32R while rotating clockwise toward the partition wall 35 around the virtual center axis 30Rc. A gas-liquid swirl flow RV is formed, and a large amount of liquid W mixed with fine bubbles MB can be supplied into the liquid to be treated.

  The fine bubble generators 30L and 30R can be used individually as means for supplying the fine bubble MB into the liquid to be processed, but the fine bubble generator 30L and the fine bubble generator 30R are respectively connected to the discharge ports 32L. , 32R can be arranged so as to face each other on the same axis to form a microbubble generator (not shown). The virtual center axis lines 30Lc and 30Rc of the casings 30L and 30R of the fine bubble generators 30L and 30R are all ¼ circular shape, but not limited thereto, the virtual center axis lines 30Lc and 30Rc are A partial circular shape such as a 3/4 circular shape can be used.

  Next, a microbubble generator 40rR which is another embodiment will be described based on FIG. A fine bubble generator 40rR shown in FIG. 10 has a cylindrical casing 41R whose virtual center axis 40Rc forms a right-handed spiral, a partition wall 44 that closes one end of the casing 41R, and the other end of the casing 41R. In order to introduce the liquid W into the casing 41R along the direction of twisting with respect to the discharge port 42R opened in the partition wall 45 and the virtual center axis 40Rc, the outer periphery side of the peripheral wall 48 near the partition wall 24 of the casing 41R. The connected liquid supply pipe 19 and the air supply pipe 13 connected to the partition wall 44 of the casing 41R for introducing the gas G into the casing 41R are provided.

  The air supply pipe 13 communicates with a gas introduction path 43 extending in the casing 41R. The gas introduction path 43 is formed of a circular pipe body, extends from the partition wall 44 toward the partition wall 45 so as to be coaxial with the virtual center axis 40Rc in the casing 41R, and is a front end opening that serves as a gas introduction port into the casing 41R. A portion 43a and a plurality of openings 43b are arranged in the casing 41R. The plurality of openings 43b are formed in the peripheral wall of the gas introduction path 43 near the tip opening 43a.

  When the liquid W and the gas G are supplied into the casing 41R via the liquid supply pipe 19, the air supply pipe 13, and the gas introduction path 43, respectively, the gas introduction path 43 enters the gas-liquid swirl chamber 41Rs of the casing 41R. A gas-liquid swirl flow RV that flows in the gas-liquid swirl chamber 41Rs toward the discharge port 42R while rotating so as to draw a right-hand screw around the virtual center axis 40Rc is formed. The gas-liquid swirl flow RV flows in the gas-liquid swirl chamber 41Rs while drawing a right-hand thread, and flows in the casing 41R so as to draw a right-handed spiral as a whole, and from the discharge port 42R to the outside of the casing 41R. Discharged.

  In the fine bubble generator 40rR, the gas G can be supplied into the casing 41R from the tip opening 43a and the opening 43b of the gas introduction path 43 arranged in the casing 41R, so that the tip opening 43a and the opening 43b are provided. By arranging at a location where fine bubbles are likely to be generated, the amount of fine bubbles generated can be increased. In the present embodiment, the gas introduction path 43 is disposed so that the tip opening 43a is positioned near the center of the entire length of the casing 41R (the length from the inner surface of the partition wall 44 to the inner surface of the partition wall 45). Therefore, the tip opening 43a and the opening 43b can be arranged by selecting a portion where fine bubbles are likely to be generated, such as a region near the partition wall 44 or a region near the partition wall 45. Further, only one of the tip opening 43a and the opening 43b can be provided, or a slit-like opening can be provided instead of the circular opening 43b. Furthermore, it can also be established in a state where a plurality of openings 43b are dispersed in the entire peripheral wall of the gas introduction path 43 or a specific portion of the peripheral wall.

  Further, since the gas introduction path 43 is not limited to the one arranged in the casing 41R of the fine bubble generator 40rR shown in FIG. 10, the fine bubble generators 10L, 10R, 20rR, 20lL, and 20lR shown in FIGS. , 30L, 30R casings 11R, 11L, 21R, 21L, 31L, 31R, 41R, etc.

  Next, based on FIG. 11, a fine bubble generator 50R as another embodiment will be described. In the fine bubble generator 50R, portions common to the fine bubble generator 10R shown in FIG. 3 are given the same reference numerals as those in FIG.

  As shown in FIG. 11, in the fine bubble generator 50R, the liquid supply pipe 19a has a peripheral wall 18 so that the central axis (not shown) is inclined with respect to the virtual central axis 50Rc of the cylindrical casing 51R. Is attached. An inclined surface 14b that is parallel to the central axis of the liquid supply pipe 19 is provided on the inner side of the partition wall 14a (the side facing the casing 51R). A funnel surface 15b having a diameter continuously reduced from the inner peripheral surface of the peripheral wall 18 toward the discharge port 12R is provided on the inner side (the side facing the casing 51R) of the partition wall 15a.

  The liquid W introduced into the casing 51R from the liquid supply pipe 19a flows into the gas-liquid swirl chamber 51Rs from an oblique direction with respect to the virtual center axis 50Rc, whereby the liquid W is discharged in the gas-liquid swirl chamber 51Rs. Since the flow toward the outlet 12R is increased, the fluid containing the fine bubbles MB formed in the gas-liquid swirl chamber 51Rs can be efficiently discharged from the discharge port 12R.

  Further, by providing the funnel surface 15b inside the partition wall 15a, it is possible to suppress the occurrence of turbulent flow in the boundary region between the gas-liquid swirl chamber 51Rs and the discharge port 12R, and thus the gas-liquid swirl chamber 51Rs is formed. The gas-liquid swirl flow RV can be efficiently discharged from the discharge port 12R. A fin (not shown) is provided on the inner peripheral surface of the peripheral wall 18 of the casing 51R along the swirl direction of the gas-liquid swirl flow RV, and a negative pressure is applied near the opening of the gas introduction path 17 on the gas-liquid swirl chamber 51Rs side. It is possible to increase the gas introduction effect.

  Next, a microbubble generator 50rR as another embodiment will be described with reference to FIG. In the fine bubble generator 50rR, portions common to the fine bubble generator 20rR shown in FIG. 4 are given the same reference numerals as those in FIG.

  In the fine bubble generator 50rR, in order to introduce the fluid into the cylindrical casing 21R, the fluid supply pipes 54 respectively communicate with the peripheral wall 28 of the casing 21R and the plurality of sub-fluid introduction paths 52 and 53 that communicate with the casing 21R. , 55 are provided. The fluid supply pipes 54 and 55 are both connected by the same structure as the connection structure of the liquid supply pipe 19 to the casing 21R. The plurality of fluid supply pipes 54 and 55 are spaced from the proximal end side (the partition wall 24 side to which the air supply pipe 13 is connected) of the casing 21R toward the distal end side (the partition wall 25 side where the discharge port 22R is opened). It is connected to the peripheral wall 28.

  As shown in FIG. 12, in the fine bubble generator 50rR, the gas G and the liquid W are supplied through the air supply pipe 13 and the liquid supply pipe 13, respectively, and from the fluid supply pipe 54 to the sub-fluid introduction path 52. The liquid W is supplied, and the gas G is supplied from the fluid supply pipe 55 to the sub fluid introduction path 53. As a result, a larger amount of fluid can be introduced into the casing 21R than when the gas G and the liquid W are introduced from the air supply pipe 13 and the liquid supply pipe 13, respectively, so that a larger quantity of fluid containing fine bubbles is supplied. can do. Note that the number of sub-fluid introduction paths, the position of arrangement, and the type of fluid introduced from each sub-fluid introduction path are not limited to those described above, and can be set according to the application and use conditions.

  Next, a microbubble generator 400 according to another embodiment will be described with reference to FIGS. In the fine bubble generating device 400, portions common to the fine bubble generating device 100 shown in FIG. 1 are denoted by the same reference numerals as those in FIG.

  As shown in FIGS. 13 and 14, the microbubble generator 400 includes a plurality of microbubble generators 100 (see FIG. 1) arranged in layers at predetermined intervals, and the connecting members 11 a are rod-shaped (or tubular). ) Are connected by a support member 56. In the microbubble generator 400, the fluids mixed with the microbubbles MB are discharged from the plurality of microbubble generators 100, respectively. Therefore, an extremely large amount of fluid mixed with the microbubbles MB can be supplied over a wide range. The microbubble generator 100 can be attached to and detached from the support member 56, and the length of the support member 56 is not limited. Therefore, the number and arrangement interval of the plurality of microbubble generators 100 are not limited to the form shown in FIG. It can be set according to the use and use conditions.

Fine bubbles onset NamaSo location of the present invention, cultivation of water for plants such as agricultural products, fish and shellfish farming water, farming water for livestock, cleaning water, drinking water for health promotion, bathing water, foot bath water or medical water It can be widely used as a means for supplying fine bubbles containing oxygen to water, a purification means for various wastewaters, or a water quality purification means for rivers, lakes, reservoirs, oceans and the like.

100, 200, 300, 400 Fine bubble generator 10L, 10R, 20rR, 20lL, 20lR, 30L, 30R, 40rR, 50R, 50rR Fine bubble generator 10Lc, 10Rc, 20Rc, 20Lc, 30Lc, 30Rc, 40Rc, 50Rc Virtual Central axis 11a Connecting member 11R, 11L, 21R, 21L, 31L, 31R, 41R, 51R, 52R Casing 11Rs, 21Ls, 21Rs, 31Lc, 31Rc, 41Rs, 51Rs Gas-liquid swirl chamber 12R, 12L, 22R, 22L, 32L, 32R, 42R Discharge port 13 Air supply pipe 14, 14a, 15, 15a, 24, 25, 34, 35, 44, 45 Partition 14b Inclined surface 15b Funnel surface 16, 36 Liquid introduction path 17, 37, 43 Gas introduction path 18, 28,38 Perimeter wall 19,1 9a Liquid supply pipe 43a Tip opening 43b Opening 52, 53 Sub-fluid introduction path 54, 55 Fluid supply pipe 56 Support member RV, LV Gas-liquid swirl flow V Negative pressure cavity MB Micro bubble G Gas W Liquid

Claims (3)

A cylindrical casing whose virtual central axis forms a curved, spiral, or polygonal part, a partition wall that closes one end of the cylindrical casing, and a discharge provided at the other end of the cylindrical casing with outlet, and a fluid introducing passage provided to communicate to the tubular casing for introducing a fluid into the along a direction forming an skewed with respect to the imaginary central axis said cylindrical casing, wherein Two fine bubble generators provided with a gas introduction path communicating with the cylindrical casing to introduce gas into the cylindrical casing are arranged so that the discharge ports face each other. fine bubble generating device according to claim. The tubular fine bubble generating device according to claim 1, wherein the opening of the gas introduction path comprising a gas inlet, characterized in that arranged in the tubular casing into the casing. For introducing a gas into the tubular casing, the peripheral wall of the tubular casing, fine bubble generator according to claim 1 or 2 provided with a secondary fluid introduction path communicating with the tubular casing.

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