JP2015174055A - Gas dissolution device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas dissolution device capable of extremely efficiently dissolving various gases, without using a complicated gas-liquid mixing mechanism.SOLUTION: A gas dissolution device comprises a liquid hydraulic member 1 having a member body 6 for forming a liquid flow passage in a penetration form and forming an orifice part 2c smaller in the flow cross-sectional area than an inflow port in a midway position of the flow passage and a collision part of projecting from an inner peripheral surface of the flow passage in the form of partitioning an axial cross section of the flow passage into two or more of segment areas 2e by the orifice part 2c, having a plurality of turns of orifice ribs in the circumferential direction on an outer peripheral surface and further reducing the flow passage cross-sectional area of the orifice part 2c and a dissolution object gas supply part 12 for making dissolution object gas flow in from a gas supply source positioned in an external part of the member body in the liquid flow passage of the member body 6. A flow of liquid supplied to the inflow end of the member body 6 of the liquid hydraulic member 1, is passed by increasing a speed while distributing to the respective segment areas 2e after colliding with a collision part 3, and the dissolution object gas is dissolved by mixedly crushing by roling in a turbulent flow area formed just downstream of the collision part.

Description

  The present invention relates to a gas dissolving apparatus.

  An aeration apparatus that supplies air and oxygen in the form of bubbles through a porous diffused gas is known as a means of dissolving air and oxygen so that the tank for raising fish does not run out of oxygen. ing. In addition, ozone has a very strong sterilizing power and is used in various applications for the purpose of sterilization, disinfection or deodorization in the form of ozone water in which it is dissolved in water. In Patent Documents 1 and 2, the water to be treated is circulated between an ejector in which an ozone gas suction introduction portion is formed in a venturi tube and a water storage tank, and coarse ozone bubbles introduced from the ejector are dissolved and reduced while stirring. A scheme is disclosed.

JP 2004-330050 A JP 2007-275893 A

  However, the aeration apparatus using a porous air diffuser has a drawback that the bubble diameter is too large and a sufficient dissolution effect cannot be obtained. In the methods of Patent Documents 1 and 2, ozone is mixed and agitated by a known ejection mechanism such as a venturi tube or an orifice, but the flow velocity increases as the fluid resistance when passing through the throttle hole is expected to increase. In addition, there is a drawback that a sufficient effect of dissolution and stirring cannot be obtained because the radial back pressure from the inner wall surface of the hole is easily received in the throttle hole. Further, as a flow element for further finely pulverizing the bubbles, there is a problem that only the vortex generation associated with the opening / turbulence of the water flow itself that has passed through the throttle hole can be expected. After all, in ozone bubble miniaturization using the technique of this document, a mechanism that forms coarse bubbles once and then shrinks by dissolution during water circulation must be dominant, and it takes a long time. Water circulation or agitation is required, and the production efficiency of ozone water is very poor.

  An object of the present invention is to provide a gas dissolving apparatus capable of dissolving various gases extremely efficiently without using a complicated gas-liquid mixing mechanism.

In order to solve the above problems, the gas dissolving apparatus of the present invention is:
An inflow end that is a liquid inflow side and an outflow end that is a liquid outflow side are defined, and a liquid flow path that connects an inflow port that opens to the inflow end and an outflow port that opens to the outflow end is formed in a through shape, A member body in which a throttle part having a smaller flow cross-sectional area than the inlet is formed at an intermediate position of the flow path, and an inner periphery of the flow path in such a manner that the axial cross section of the flow path is divided into two or more segment regions at the throttle part A liquid processing member having a collision portion that protrudes from the surface and has a plurality of circumferential restriction ribs on the outer peripheral surface and further reduces the flow passage cross-sectional area of the restriction portion;
A dissolved gas supply unit for flowing the dissolved gas from a gas supply source located outside the member main body into the liquid flow path of the member main body,
After the liquid flow supplied to the inflow end of the member body of the liquid physical member collides with the collision part, the liquid flow is accelerated and passed while being distributed to each segment area, and the disturbance formed immediately downstream of the collision part. It is characterized in that the gas to be dissolved is involved in the basin and mixed and pulverized to be dissolved.

  In the member main body, the liquid flow generates a violent turbulent flow when it collides with the collision portion and detours to the segment region. In addition, a plurality of throttle ribs are formed on the outer peripheral surface of the collision part, and the liquid flows in the tangential direction of the outer peripheral surface so as to bypass the collision part. Therefore, in the groove (or valley) between the throttle ribs By being throttled, the speed is further increased, and the effect of generating turbulence is enhanced. By this turbulent flow, the shearing / pulverization effect of the dissolved gas flowing together with the liquid is improved, and a remarkable gas dissolution effect is achieved.

  In addition, the dissolved gas once dissolved (or the gas component originally dissolved in the liquid: the gas component may be different from the intended dissolved gas) is instantaneously increased in the segment area. Distributed. In particular, the local and instantaneous speed-up effect is further enhanced in the groove (or valley) between the diaphragm ribs. In the region where the flow is increased in this way, a negative pressure region is formed according to Bernoulli's principle, and dissolved gas in the liquid is deposited to generate fine bubbles. This deposition of gas proceeds vigorously in a boiling phenomenon, further enhancing the liquid stirring effect and the turbulent flow generation effect.

  The fact that once dissolved gas boils and precipitates due to reduced pressure reduces the amount of dissolved gas in the liquid, but the time for the liquid to pass through the reduced pressure region is very instantaneous, and the dissolved gas introduced from the outside The agitation and forced dissolution effect on the water proceeds in a way that exceeds that. As a result, although seemingly contradictory, the effect of pulverizing / dissolving the dissolved gas is further enhanced by the stirring effect of the boiling of the dissolved gas.

  Bubbles generated by boiling precipitation grow while gradually increasing the bubble diameter while the liquid stays in the reduced pressure region with the inflow of surrounding dissolved gas components from extremely fine bubble generation nuclei. However, as described above, the period during which the liquid stays in the reduced pressure region is extremely instantaneous, and its growth stops quickly when the reduced pressure region is removed. Accordingly, the generated bubbles are extremely small and are generated as so-called fine bubbles (1 μm or more and 500 μm or less) or ultrafine bubbles (30 nm to less than 1 μm) (hereinafter collectively referred to as microbubbles). As a result, not only the amount of dissolved gas can be increased, but also the gas remaining without being dissolved remains in the liquid as microbubbles with a very low ascent rate, and this is known in various ways unique to microbubbles. There is also an advantage that effects (for example, cleaning effect, liquid permeability promoting effect, etc.) are exhibited depending on the type of gas.

  And in this invention, the collision part which further reduces the flow-path cross-sectional area of the said aperture | diaphragm | squeeze part is arrange | positioned in the form which partitions the axial cross section of a flow path into a some segment area | region in an aperture | diaphragm | squeeze part. In other words, instead of reducing the cross-sectional area of the flow path toward the center of the cross section at a high flow velocity in the radial direction, the area where the liquid can flow is said to be in the circumferential direction by using the collision part as an obstacle. This is because the cross section of the flow path is reduced by thinning out. As a result, the fluid resistance at the throttle portion does not increase excessively, and the effect of increasing the flow velocity and thus the effect of generating negative pressure can be greatly increased. Thereby, the decompression effect in each segment region (and downstream thereof) is greatly enhanced, and for example, even if the dissolved gas concentration is the same, finer and more bubbles can be deposited. In addition, since the flow rate is not excessively reduced, the gas dissolution effect due to stirring and shearing can be maintained well. Such an effect is more remarkable when the collision part is formed in a form in which the axial cross section of the flow path is divided into three or more segment regions at the throttle part.

  Next, the fluid that flows into the segment region mainly flows around the tip of the collision portion, and the flow near the center of the cross section where the flow velocity becomes the highest tends to be decelerated due to the detour. Therefore, it is effective to form a high-speed flow gap for passing the central flow of the cross section, which is relatively high speed with respect to the flow around the cross section, between the tip portions of two or more of the plurality of collision portions. is there. Thereby, the flow near the center of the cross section can be passed through the high-speed flow gap without greatly decelerating. As a result, the flow velocity of the liquid is greatly increased in the high-speed flow gap, and the dissolution effect of the gas to be dissolved by stirring and shearing can be promoted. In addition, since the detour flow around the collision portion causes a strong turbulent flow region immediately downstream of the high-speed flow gap due to the presence of the narrowed rib portion around the collision portion, bubble growth is suppressed when passing through the turbulent flow region. Even if this remains, further miniaturization can be achieved.

  The high velocity flow gap can be formed in various forms. For example, at least one pair of a plurality of collision portions is arranged in a shape facing the inner diameter direction across the center of the section of the throttle portion, and a central gap constituting a high-speed flow gap is formed between the tips of the collision portions You can also According to this configuration, the flow at the center of the cross section having the highest flow velocity can be passed through the center gap without causing a large loss. The flow at the center of the cross section is further narrowed by the passage of the central gap to increase the speed, but since the flow detour to the segment region side is permitted, an increase in fluid resistance is effectively suppressed. As a result, the depressurization effect is greatly enhanced, and the flow velocity at the center of the cross section can be greatly increased. Therefore, the dissolution effect of the dissolved gas by stirring and shearing can be promoted. Further, even when bubbles remain, it is possible to further reduce the size.

  When the segment region is formed in three or more, a cone-shaped portion that reduces the axial cross section toward the tip is formed at the tip of the collision portion, and the cone-shaped portion of the two collision portions adjacent to each other across the segment region is formed. A slit portion constituting a high-speed flow gap can be formed between the outer peripheral surfaces. Since the slit portion is formed in the direction of the outer peripheral surface of the cone portion, the flow toward the slit portion is constricted so as to overcome the bulge along the cone portion of the cone portion, and is compressed together with the introduced dissolved gas. . As a result, the dissolution effect of the gas to be dissolved is enhanced, and for example, the dissolution of the gas to be dissolved can be promoted exceeding the saturation concentration under atmospheric pressure.

  Moreover, since the flow allowance of the liquid compressed in the longitudinal direction of the slit portion is given, the flow velocity is hardly lowered, and this also becomes a factor for further enhancing the pressure reduction effect. In the conventional venturi tube or orifice, the decompression area was formed in the shape of a point in the vicinity of the center of the throttle, but in the above configuration, the decompression area is formed linearly along the slit portion, so that the decompression area is greatly expanded. Further, the dissolution promoting effect of the gas to be dissolved is further enhanced. Further, even when bubbles remain, further miniaturization can be achieved.

  The collision parts can be provided in a cross shape in which the protruding directions are orthogonal to each other in the axial section of the diaphragm part, and the diaphragm part can be divided into four diaphragm segment regions by these collision parts. By disposing the collision part in directions orthogonal to each other and dividing into four throttle segment regions, the object of arrangement of the collision part and the throttle segment region with respect to the center of the cross section is improved, and the dissolution promoting effect of the gas to be dissolved is enhanced. . Further, even when bubbles remain, fine bubbles can be deposited more uniformly.

  Also in this case, in order to pass the cross-sectional center flow that is relatively high speed with respect to the cross-sectional peripheral flow, between the tip portions of two or more of the plurality of collision portions that protrude toward the central portion of the cross-section of the throttle portion. The high-speed flow gap can be formed. The four collision portions can be provided so as to protrude from the inner peripheral surface of the flow channel toward the central portion of the flow channel. In addition, by forming a cone-shaped portion that reduces the axial cross section toward the tip of each collision portion, a high-speed flow is generated between the outer peripheral surfaces of the cone-shaped portions in the collision portions adjacent to each other across the segment region. The slit part which comprises a gap can be formed. As a result, a central gap that constitutes a part of the high-speed flow gap is formed between the tips of the collision portions that are arranged opposite to each other in the inner diameter direction across the center of the cross section of the throttle portion. The part is formed in a cross shape integrated through a central gap.

  According to said structure, the flow of the cross-sectional center used as the highest flow velocity is effectively restrict | squeezed by the four cone-shaped parts arrange | positioned so that a cross-sectional center may be surrounded, and it will flow in while increasing at a center gap. And the surrounding four slit portions communicate with the center gap, and the flow that is squeezed and compressed in the center gap is extremely effectively suppressed from increasing the fluid resistance by detouring to the slit portion, and Since it is squeezed by a slit, a decrease in flow velocity at the detour destination can be suppressed to a low level. As a result, not only the central gap but also the slit portion has an extremely reduced pressure effect, and the dissolution effect of the gas to be dissolved by stirring and shearing can be promoted. Further, even when bubbles remain, it becomes possible to further reduce the size, and this is particularly effective for the generation of ultrafine bubbles.

  In this case, by sharply forming the tip of the collision part facing the center gap, the flow passing through the vicinity can be accelerated particularly locally, generating turbulent flow that is convenient for gas dissolution in the region immediately below the center gap. Can be further promoted.

  Next, in order to enhance the flow throttling effect and thus the liquid stirring effect in the valley-shaped portion, the trough-shaped portion of the throttling rib formed on the outer peripheral surface of the collision portion should have a shape that decreases in width toward the bottom of the trough. desirable. In this case, it is preferable that the plurality of throttle ribs in the valley portion are formed adjacent to each other with the apex portion having an acute angle. Further, the apex angle of the aperture rib is preferably set to 60 ° or less and 20 ° or more from the viewpoint of optimizing the above effect.

  Further, the plurality of winding ribs can be integrally formed in a spiral shape. In this way, formation of the throttle rib is facilitated, and the throttle rib is inclined with respect to the flow, so that the flow component crossing the ridge line portion of the throttle rib increases, and the turbulent flow generation effect accompanying flow separation becomes remarkable. Therefore, the bubbles can be further miniaturized. In this case, if 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 throttle rib, and manufactured. Is easy.

  Next, the dissolved gas supply part is formed in the wall part of the member main body on the upstream side of the collision part, and one end is opened as a gas outlet on the inner peripheral surface of the liquid passage, and the other end is the outer surface of the member main body. It can comprise as a thing provided with the gas supply path opened as a to-be-dissolved gas supply port. By providing the gas supply passage in the member main body, the liquid processing member serves as the dissolved gas supply unit, and the number of parts can be reduced. In this case, by opening the gas outlet of the gas supply passage to the throttle portion, the dissolved gas can be sucked and injected due to the pressure reducing effect in the throttle portion, and the gas mixing efficiency can be improved. The gas outlet may be opened at the tip of the collision part.However, if the required dissolved concentration of the gas to be dissolved is large, the gas outlet is located upstream from the collision part at a position different from the collision part. Opening the gas outlet is advantageous because the cross-sectional dimension of the liquid passage and the gas outlet can be set without receiving a contraction of the size of the collision portion.

  On the other hand, the dissolved gas supply unit can be configured as a gas injection nozzle provided on a liquid inflow pipe connected to the inlet of the member body. Thereby, the injection amount of the gas to be dissolved can be set more freely without receiving the contract of the size and shape of the liquid processing member. As will be described later, when a plurality of liquid processing members are distributed and arranged in parallel, if a gas injection nozzle is provided upstream from the distribution branch point, the dissolved gas is uniformly distributed to each liquid processing member. be able to.

  Next, the liquid processing member can be configured to include an upstream first liquid processing member and a downstream and second liquid processing member arranged in series in the liquid flow direction. In this case, the dissolved gas supply unit supplies the dissolved gas to the first liquid processing member, and the second liquid processing member further pulverizes the undissolved dissolved gas by the first liquid processing member. -It can be dissolved. The dissolution efficiency of the gas can be greatly increased by pulverizing and dissolving the gas to be dissolved in stages by the plurality of liquid processing members connected in series. This is a particularly effective method when it is desired to increase the amount of dissolved gas or to decrease the ratio of undissolved gas. Of course, the number of liquid processing members arranged in series can be three or more. At this time, the dissolved gas can be distributed and supplied to each of two or more of the plurality of liquid processing members through separate paths.

  Further, the liquid circulation pipes can be branched into a plurality of parts in the middle, and a plurality of liquid processing members can be provided in parallel on the branched flow pipes. The dissolved gas supply unit can be configured to supply the dissolved gas to at least one of the liquid processing members connected in parallel. By using a plurality of liquid processing members in parallel, a required amount of the gas to be dissolved can be efficiently dissolved even when the flow rate of the liquid to be processed is large.

  In the present invention, the type of the liquid that dissolves the gas is not particularly limited, but water can be used, for example. In addition to water, it is alcohol (and its dilution with water) and other organic solvents. The type of the gas to be dissolved is not limited in the same manner, but is, for example, oxygen, nitrogen, air, ozone, chlorine or the like.

The schematic diagram which shows one structural example of the gas dissolving apparatus of this invention. Sectional drawing which shows the detail of the liquid processing member of FIG. The figure which expands and shows the principal part of the liquid processing member of FIG. A Action explanatory drawing of a collision part. B is an operation explanatory view of the diaphragm rib. The figure which shows the 1st modification of a collision part. The figure which shows the 2nd modification of a collision part. The figure which shows the 3rd modification of a collision part. The figure which shows the 4th modification of a collision part. The figure which shows the 5th modification of a collision part. The figure which shows the 6th modification of a collision part. The figure which shows the 7th modification of a collision part. The figure which shows the 8th modification of a collision part. The figure which shows the 9th modification of a collision part. The figure which shows the 10th modification of a collision part. The figure which shows the 11th modification of a collision part. The figure which shows the 12th modification of a collision part. The figure which shows the 13th modification of a collision part. The figure which shows the 14th modification of a collision part. The figure which shows the 15th modification of a collision part. The figure which shows the 16th modification of a collision part. Sectional drawing which shows the example which connects the liquid processing apparatus in multiple stages in series. Sectional drawing which shows the example which comprises a to-be-dissolved gas supply part as a gas injection nozzle separate from a liquid processing apparatus. Sectional drawing which shows the example which forms a gas supply path in a collision part. Sectional drawing which similarly shows another example. The schematic diagram which shows the 1st example which connects a some liquid processing apparatus in parallel. The schematic diagram which similarly shows a 2nd example. The schematic diagram which similarly shows a 3rd example. The schematic diagram which similarly shows a 4th example. The schematic diagram which shows the example which provides a liquid processing member on a circulation line. The schematic diagram which shows the 5th example which connects a some liquid processing apparatus in parallel. The schematic diagram which shows the example which uses external air as a to-be-dissolved gas supply source.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram showing a configuration example of the gas dissolving apparatus of the present invention. The gas dissolving device 100 is provided with a liquid flow path 18 formed of a piping member inside the main body case 100C, and both ends thereof open the liquid inlet 19 and the liquid outlet 20 with respect to the main body case 100C. Yes. A liquid supply pipe 51 (a water pipe in this embodiment) is connected to the liquid inlet 19 so that a liquid W to be processed, for example, water (tap water or the like) is supplied to the liquid flow path 18. .

  A liquid processing apparatus 1 is provided in the middle of the supply liquid flow path 18, and a gas supply pipe 12 is connected to the liquid processing apparatus 1, and a gas to be dissolved is supplied to the liquid processing apparatus 1 through this. The In the present embodiment, the gas supply line 12 opens the gas supply port 14 on the main body case 100C, and the gas pipe 31 is connected thereto. In this embodiment, a gas pipe 31 is connected to a cylinder 41 of a gas to be dissolved (for example, oxygen, nitrogen, air, chlorine, etc.), and the gas to be dissolved from the cylinder 41 is reduced by a pressure reducing valve 42 and a flow rate adjustment valve 32. The pressure and flow rate are adjusted and guided to the gas supply line 12. The dissolved gas is dissolved in the liquid in the liquid flow path 18 by the liquid processing apparatus 1 to become a gas-dissolved liquid GW, and flows out and supplied from the liquid outlet 20.

  In the gas dissolving apparatus 100, a flow detection sensor 22 is provided in the middle of the supply liquid flow path 18, and an electromagnetic valve 13 is provided in the middle of the gas supply pipe 12. Further, a power circuit 16 is provided in the main body case 100C, and the commercial AC input AC input through the power plug 22 and the power cord 21 is converted into a drive voltage and a signal voltage for the electromagnetic valve 13, and output. It is supposed to be. Further, a control circuit 17 is provided in the case 100C, and the changeover switch 15 and the flow detection sensor 22 are connected to the case 100C. The control circuit 17 closes the electromagnetic valve 13 when the flow detection sensor 22 detects that the flow in the supply liquid flow path 18 is not detected or the changeover switch 15 is turned off. As described above, the supply of the dissolved gas to the liquid processing apparatus 1 is automatically shut off.

  FIG. 2 is an enlarged view showing the liquid processing apparatus 1 taken out. The member body 6 is formed with a passage 2 connecting the inlet 2n opening at the inflow end and the outlet 2x opening at the outflow end in a penetrating form, and flows in the middle of the channel 2 from the inlet 2n. A narrowed portion 2c having a small cross-sectional area is formed. As shown in FIG. 3, the throttle section 2c further reduces the channel cross-sectional area of the throttle section 2c by dividing the axial section of the flow path 3 into three or more, in this embodiment, four segment regions 2e. The collision part 3 to be made is arranged. Each collision portion 3 is configured as a screw member, and as shown in FIG. 2, four are attached so as to be screwed into a screw hole 3h formed in a radial direction from the outer peripheral surface side of the member body 6 toward the throttle portion 2c. It has been. Each segment region 2e is formed such that the flow path cross-sectional areas are equal to each other.

  A gas supply passage 10h having one end opened on the inner peripheral surface and the other end opened on the outer peripheral surface is formed in the wall portion of the member main body 6 upstream of the collision portion 2c in the radial direction. 10 is inserted. The tip of the gas injection pipe 10 is opened as a gas outlet, and the other end is opened as a dissolved gas supply port on the outer surface of the member body 6. In this embodiment, the dissolved gas supply port of the gas supply passage 10h is formed by the connector 11 fitted therein, and the gas supply line 12 is connected thereto.

  In FIG. 2, the liquid flow supplied to the inflow end of the member body 6 is distributed to each segment region 2e after colliding with the collision portion 3 while entraining bubbles of the dissolved gas G supplied from the gas supply passage 10h. In addition, the vehicle passes at an increased speed and generates a turbulent flow when detouring to the segment area 2e. Further, as will be described later, a plurality of threads, that is, a throttle rib 5r (see FIG. 4A) is formed on the outer peripheral surface of the collision part 3, and the liquid flows in a direction tangential to the outer peripheral surface to bypass the collision part 3. Therefore, the speed is further increased and the effect of generating turbulence is drastically enhanced by narrowing in the groove (or valley) 21 (see FIGS. 4A and 4B) between the narrowing ribs. By this turbulent flow, the shearing / pulverization effect of the dissolved gas G flowing together with the liquid is improved, and the dissolution effect is enhanced. Further, the gas to be dissolved once dissolved in this manner is instantaneously accelerated and distributed to the segment region 2e. In particular, the local / instantaneous speed increasing effect is further enhanced in the groove 21 (or valley) between the narrowed ribs 5r. In such an accelerated region, a negative pressure region LPA (FIG. 4B) is formed in accordance with Bernoulli's principle, and dissolved gas in the liquid is deposited to generate fine bubbles. This deposition of gas proceeds vigorously in a boiling phenomenon, further enhancing the liquid stirring effect and the turbulent flow generation effect.

  As shown in FIG. 3, a cross-section that is relatively high-speed relative to the cross-section peripheral flow between two or more tip portions of the plurality of collision portions 3 that protrude toward the central portion of the cross-section of the throttle portion 2 c. High-speed flow gaps 2g and 2k for passing the central flow are formed. A conical portion 5t that reduces the axial cross section toward the distal end is formed at the distal end portion of the collision portion 3 (in this embodiment, it is conical, but other conical shapes such as a quadrangular pyramid and a hexagonal pyramid are formed. However, in the two collision portions 3 adjacent to each other across the segment region 2e, a slit portion 2g constituting a high-speed flow gap is formed between the outer peripheral surfaces of the conical portions 5t. On the other hand, a center gap 2k constituting a high-speed flow gap is formed between the tips of the four collision portions 3 facing each other in the inner diameter direction across the center of the section of the throttle portion 2c.

  As shown in FIG. 3, the collision portions 3 are provided in a cross shape in which the projecting directions are orthogonal to each other in the axial section of the restriction portion 2c. The collision portions 3 cause the restriction portions to be divided into four restriction segment regions 2e. It is divided. The four collision portions 3 protrude from the inner peripheral surface of the flow channel 2 toward the central portion of the flow channel 2. Further, in the collision part 3 adjacent to each other across the segment region 2e, four slit parts 2g are formed between the outer peripheral surfaces of the cone-shaped part 5t, and the collision part 3 arranged opposite to the inner diameter direction is formed. A central gap 2k is formed between the tips. As a result, the high-speed flow gap is formed in a cross shape in which the four slit portions 2g are integrated via the center gap 2k.

  Further, as shown in FIG. 3, a plurality of circumferential restriction ribs 5 r are formed on the outer peripheral surface of each collision portion 3 along the protruding direction of the collision portion 3. The valley portion has a shape in which the width is reduced toward the valley low. The plurality of diaphragm ribs 5r are formed adjacent to each other with the apex being an acute angle. The apex angle of the aperture rib 5r is set to 60 ° or less and 20 ° or more, for example. As described above, the collision portion 3 is a screw member, and the plurality of winding ribs 5r are integrally formed in a spiral shape.

  As shown in FIG. 2, the liquid processing apparatus 1 does not reduce the cross-sectional area of the flow path 2 in the throttle portion 2 c in a similar manner in the radial direction toward the cross-sectional center O where the flow velocity is high, By using it as an obstacle, the region through which the liquid can flow is reduced in the form of thinning out in the circumferential direction with respect to the center of the cross section. The fluid resistance at the throttle portion 2c does not increase excessively, and the effect of increasing the flow velocity, and hence the negative pressure generating effect, can be greatly increased. Thereby, the decompression effect in each segment area | region 2e (and its downstream) is improved significantly, for example, even if the dissolved gas concentration is the same, it can deposit finer and a lot of bubbles. In addition, since the flow rate is not excessively reduced, the gas dissolution effect due to stirring and shearing can be maintained well. Between the inflow side taper portion 2a and the outflow side taper portion 2b, the throttle portion 2c is formed as a constant cross-section portion, and the collision portion 3 is disposed in the constant cross-section portion (2c). Thus, the flow increased in speed can be guided to the collision part 3 while being stabilized at the constant section (2c).

  In the throttle portion 2c, the flow in the vicinity of the center of the cross section where the flow velocity is maximized is distributed to each segment region 2e, bypassing the tip portion of the collision portion 3. As shown in FIG. 3, since the high-speed flow gaps 2g and 2k are formed between the front end portions of the collision portion 3, the high flow velocity near the center of the cross section passes through the high-speed flow gaps 2g and 2k without significantly decelerating. it can. As a result, in the high-speed flow gaps 2g and 2k, the flow rate of the liquid is greatly increased, and the dissolution effect of the dissolved gas by stirring and shearing can be promoted. In addition, the detour flow of the collision portion 3 causes a strong turbulent flow region in the immediately downstream regions 2g and 2k of the high-speed flow gap due to the presence of the restriction rib portion restriction rib 5r around the collision portion. Even when bubble growth is suppressed and bubbles remain, further miniaturization can be achieved.

  Of the high-speed flow gaps 2g and 2k, the slit portion 2g formed between the tip portions (cone portions) 5t and 5t of the collision portion 3 adjacent to each other across the segment region 2e is an outer peripheral surface bus of the conical portion 5t. Formed in the direction. Accordingly, the flow toward the slit portion 2g is squeezed and compressed so as to overcome the bulge along the generatrix of the cone-shaped portion 5t. As a result, the dissolution effect of the gas to be dissolved is enhanced, and for example, the dissolution of the gas to be dissolved can be promoted exceeding the saturation concentration under atmospheric pressure. At this time, since the flow allowance of the compressed liquid is given in the longitudinal direction of the slit portion 2g, the flow velocity is hardly lowered, and the cavitation (decompression) effect is further enhanced. Further, since the cavitation generation region is formed linearly along the slit portion 2g, the region where the bubbles are deposited under reduced pressure is greatly expanded, and the dissolution promoting effect of the dissolved gas is further enhanced. Further, even when bubbles remain, further miniaturization can be achieved.

  On the other hand, the center gap 2k is formed so as to include the center of the cross section, and the center flow having the maximum flow velocity can pass through the center gap 2k without being influenced by detours. In addition, the center flow is further narrowed by the passage of the center gap 2k to increase the speed, but since the flow detour to the segment region 2e side is permitted, an increase in fluid resistance is effectively suppressed. As a result, the cavitation (decompression) effect at the center of the cross section can be further enhanced, and the dissolution effect of the dissolved gas by stirring and shearing can be promoted. Further, even when bubbles remain, it becomes possible to further reduce the size, and this is particularly effective for the generation of ultrafine bubbles. Each flow distributed to the segment region 2e generates a vortex or a turbulent flow downstream of the individual impingement portions 3, so that the dissolution effect or the bubble crushing / miniaturization effect is enhanced.

  Then, as shown in FIG. 4A, the high-speed flow near the center of the cross-section is effectively constricted by the four conical portions 5t arranged so as to surround the cross-sectional center and flows into the center gap 2k while being accelerated. As shown in FIG. 3, four slit portions 2g around the center gap 2k communicate with each other, and the flow compressed and compressed in the center gap 2k bypasses the slit portion 2g, so that the fluid resistance is extremely increased. Effectively suppressed. Moreover, since the flow detouring to the slit portion 2g itself also has a degree of freedom in the slit longitudinal direction, a decrease in the flow velocity can be suppressed low. As a result, the cavitation (decompression) effect is extremely active even in the center gap 2k and the slit portion 2g, and the dissolution effect of the dissolved gas by stirring and shearing can be promoted. Further, even when bubbles remain, it becomes possible to further reduce the size, and this is particularly effective for the generation of ultrafine bubbles. Further, the tip of the collision part 3 (conical part 5t) facing the center gap 2k is sharply formed, and the flow passing through the vicinity thereof can be made particularly fast, so that gas can be dissolved in the region immediately below the center gap 2k. Convenient turbulence generation can be further promoted.

  Further, a plurality of circumferential narrowing ribs 5 r are formed on the outer peripheral surface of the collision part 3 along the protruding direction of the collision part 3. The gas-dissolved liquid that flows in the tangential direction of the outer peripheral surface of the collision portion 3 is further increased in speed by being squeezed in the groove portion (or valley-like portion) 21 between the squeezing ribs 5r, and the pressure reduction effect is enhanced. As shown in FIG. 4B, the flow on the valley opening side is relatively slow, and the pressure is particularly high with respect to the high-speed flow on the valley bottom side. That is, a low-speed high-pressure area HPA is formed on the valley opening side, and a high-speed low-pressure area LPA is formed on the valley low side, so that the gas saturation dissolution amount of the liquid on the valley opening side increases and the saturation dissolution amount on the valley bottom side decreases. As a result, as shown in FIG. 6, the dissolved air (dissolved liquid) SGF in the water flow changes from the low-speed flow region LF (high pressure region HPA: FIG. 4A) on the valley opening side to the high-speed flow region FF (low pressure region LPA: on the valley low side). In FIG. 4B), the bubbles MB are deposited very actively.

  Further, as shown in FIG. 3, the collision portion 3 is formed by a screw member 5, and a plurality of winding ribs 5r are integrally formed in a spiral shape. In addition to being able to easily use the thread as the throttle rib 5r, when the throttle rib 5r is inclined with respect to the flow, the flow component crossing the ridge portion of the throttle rib 5r increases, and the effect of generating turbulent flow accompanying flow separation becomes significant. Therefore, there is an advantage that the gas dissolution effect and further miniaturization of bubbles can be achieved.

  Hereinafter, various modifications of the present invention will be described. FIG. 5 and FIG. 6 are modifications according to the form of formation of the protruding portion 3 in the liquid processing apparatus, both of which form the collision portion in the form of dividing the cross section of the throttle portion 2c into two segment regions 2e and 2e. Yes. In the configuration of FIG. 5, a pair of collision parts 30 ′ and 30 ′ made of screw members are opposed to each other in the diameter direction of the throttle part 2 c, and a high-speed flow gap 2 k is formed between the tip surfaces 5 u and 5 u. On the other hand, in the configuration of FIG. 6, the high-speed flow gap is not formed, and the collision portion 30 that crosses the cross section of the throttle portion 2c in the diameter direction is formed by a screw member. Further, in the liquid processing apparatus 70 of FIG. 7, a plurality of throttle portions 2c are provided in the member main body 6, and the collision portion 30 similar to that of FIG. 5 (of course, has a high-speed flow gap 2k as shown in FIG. This is an example in which each of the narrowed portions 2c is formed.

  Next, as shown in FIG. 3, in the configuration in which the throttle ribs 5r are continuously formed on the outer peripheral surfaces of all the collision parts 3, there is a concern that the bubble deposition becomes excessive when the flow velocity of the flow flowing into the throttle part 2c is large. Is done. Therefore, as shown in FIGS. 8, 9, and 10, it is also possible to form the squeezing rib 5r only on a part of the outer peripheral surface of the collision portion to suppress the bubble deposition frequency in the valley portion.

  FIG. 8 shows an example in which a part of the plurality of collision portions 3 is provided with the throttle rib 5r and the remainder is not provided with the throttle rib 5r. In this embodiment, the ones with the diaphragm ribs 5r and the ones without the diaphragm ribs 5r are alternately arranged in the circumferential direction. Further, when it is desired to suppress the excessive generation of bubbles by forming the throttle rib 5r in the remaining region without forming the throttle rib 5r at the tip of the collision part 3 located at the center of the cross section where the flow velocity is particularly high. Is valid. Also in FIG. 3, the diaphragm rib 5r was not formed on the outer peripheral surface of the conical portion 5t that forms the tip of the collision portion 3, but when the bubble generation is excessive, as shown in FIG. A configuration in which the formation of the diaphragm rib 5r is omitted in the tip side region of the cylindrical peripheral side surface portion following the conical portion 5t is also possible. Further, FIG. 10 shows an example in which the diaphragm rib 5r is intermittently formed in the axial direction on the cylindrical peripheral side surface portion. Further, as shown in FIG. 7, it is also possible to adopt a configuration in which no diaphragm rib is formed on the outer peripheral surface of the collision portion.

  Next, as shown in FIG. 11, it is possible to form a plurality of independent diaphragm ribs 5s in close contact with each other in the axial direction so as to be closed in the circumferential direction around the axis of the collision portion 3. In FIG. 11, independent individual restricting ribs 5 s are formed in a direction orthogonal to the axis of the collision portion 3, but it is also possible to form them by inclining with respect to a plane orthogonal to the axis. In this way, as in FIG. 3, the squeezing rib is inclined, so that the effect of generating turbulent flow accompanying flow separation becomes significant, the stirring effect effective for gas dissolution is enhanced, and the bubbles are further refined. Can be achieved.

  In FIG. 3, the tip angle of the cone-shaped portion 5t that forms the tip of the collision portion 3 is 90 ° (that is, the entire circumferential angle is 360 °) expressed by a cross section cut by a plane including the axis of the collision portion 3. (Value divided by the number (4) of the collision parts 3). Therefore, as shown in FIG. 12, if each collision part 3 is positioned so that the side surfaces of the adjacent cone-shaped parts 5t are in close contact with each other so that the tip of the collision part 3 is aligned with the center of the cross section of the throttle part 2c, It is also possible to have no flow gap. As a result, the flow of the liquid is distributed to each segment region 2e, and bubbles can be generated by the cavitation effect mainly composed of the throttle rib 5r. Further, as shown in FIG. 13, the tip of the cone-shaped part 5t is brought into contact with the pair of collision parts 3 and 3 opposed in the inner diameter direction, and the remaining pair of collision parts 3 and 3 are retracted in the axial direction. By doing so, the slit portion 5t can be formed.

  The tip of the collision portion 3 can be formed flat. In the example shown in FIGS. 14 and 15, the flat tip surface 5u is formed by cutting out the tip portion of the conical portion 5t similar to FIG. Thereby, expansion of the center gap 2k and flow uniformity can be achieved. In FIG. 14, the side surfaces of the adjacent conical portions 5t are brought into close contact with each other, but the center gap 2k is formed in a closed shape by forming a flat front end surface 5u. FIG. 15 shows an example in which the slit portion 2g is formed between the side surfaces of the adjacent conical portions 5t.

  In the configuration of FIG. 16, the main collision portion 130 is disposed so as to cross the cross section of the throttle portion 2c along the inner diameter, and further, the cross section center of the throttle portion 2c is sandwiched between the main collision portion 130 and the main collision portion 130. This is an example in which a pair of opposed collision portions 30 opposed in the inner diameter direction are provided. An outer peripheral gap 2j constituting a high-speed flow gap is formed between each front end surface of the opposing collision unit 30 and the outer peripheral surface of the main collision unit 130. In the case where the inner diameter of the narrowed portion 2c must be reduced, the above configuration can be simplified as compared with the configuration in which the center gap 2k is formed. The flow in the vicinity of the center of the cross-section collides with the main collision portion 130 and detours, but passes through the outer peripheral gap 2j formed by the opposing collision portion 30 while being accelerated by the influence of centrifugal force detouring the main collision portion 130. Therefore, there is an advantage that the influence of the flow deceleration due to the collision with the main collision portion 130 is not so great.

  In the configuration of FIG. 16, the tip of the opposing collision part 30 is formed flat, and the outer peripheral gap 2j is formed in a slit shape. Since the cavitation region can be expanded in the slit longitudinal direction, fine bubbles can be generated at a higher concentration. The main collision part 130 is an integral member in the inner diameter direction in which both end parts are embedded in the member main body 6, and a throttle rib 5 r is formed on the entire outer peripheral surface of the part exposed in the throttle part 2 c. In the outer peripheral gap 2j, the outer peripheral surface of the main collision portion 130 facing the tip surface of the opposing collision portion 30 is uneven by the restriction rib 5r, and the gap interval is narrowed at the position of the restriction rib 5r (mountain) so that the high-speed flow region In the valley portion 21, the gap interval is increased and a low flow velocity region is generated. As a result, a flow of dissolved gas is generated from the low flow rate region to the high flow rate region due to the pressure difference between these two adjacent regions, and the dissolved gas is generated in the valley portion 21 shown in FIGS. 4A to 4B. By adding a gas flow, bubble deposition is extremely activated, and the liquid stirring effect and the dissolution effect are improved. Further, the outer peripheral surface of the main collision part 130 is reduced in distance from the liquid inflow side to the position facing the front end surface of the opposing collision part 30, and the flow velocity increases due to the throttling effect. It is advantageous for enhancing the dissolution effect. Note that, as indicated by broken lines in FIG. 16, the space of the valley-shaped portion 21 forms the outer peripheral gap 2j even if the front end surface of the opposing collision portion 30 is brought into contact with the diaphragm rib 5 on the outer peripheral surface of the main collision portion 130. It can be shaped.

  FIG. 17 shows an example in which the front ends of the opposing collision portions 3 and 3 are sharply formed. In the outer circumferential gap 2j, the squeezing effect near the tip of the opposing collision portion 3 is enhanced, and the gas dissolution effect can be improved by increasing the flow velocity. Each of the main collision parts has a flat front end surface 5u and a pair of collision parts 30 and 30 each having a chamfered portion 3t formed along the outer periphery of the front end surface 5u are in contact with each other at the front end surfaces 5u and 5u. In this manner, it is arranged so as to face the inner diameter direction of the throttle portion 2c. The front ends of the opposing collision portions 3 and 3 form an outer peripheral gap 2j so as to face a groove portion having a V-shaped cross section formed by the chamfered portion 3t of the two collision portions 30 and 30 forming the main collision portion. As a result, the effect of increasing the flow velocity in the vicinity of the tip of the opposed collision portion 3 is further enhanced.

  Further, as shown in FIGS. 18 and 19, the main collision portion is indicated by a pair of collision portions 30 ′, 30 ′ (hereinafter referred to as main collision portions 30 ′, 30 ′) each having flat tip surfaces 5u, 5u. It is also possible to form a central gap 2k that includes the center of the cross section of the throttle portion 2c between the tip surfaces 5u and 5u, and to be disposed opposite to the inner diameter direction of the throttle portion 2c. . FIG. 18 shows a configuration in which the distal end surfaces of the opposing collision portions 30 and 30 are brought into contact with the outer peripheral surfaces of the leading end portions of the main collision portions 30 ′ and 30 ′ (as a result, the diaphragm rib 5 r). By dividing into two collision portions 30 ′ and 30 ′ and forming the center gap 2k between the front end surfaces in this way, the flow in the vicinity of the center of the cross section where the flow velocity is maximized is restricted by the center gap 2k and further increased in speed. Turn into. FIG. 19 shows a slit-like outer peripheral gap 2j in which the front end surfaces 5u and 5u of the opposing collision portions 30 and 30 are separated from the outer peripheral surface of the front end portion of the main collision portions 30 ′ and 30 ′ (and consequently the diaphragm rib 5r). An example in which is further formed will be shown. The flow that is squeezed and compressed in the center gap 2k is diverted to the slit-shaped outer peripheral gap 2j, so that an increase in fluid resistance is extremely effectively suppressed. Further, since the outer peripheral gap 2j is also narrowed in a slit shape, a decrease in flow velocity at the detour destination can be suppressed to a low level.

  FIG. 20 is an example in which three segment regions 2 e are formed by three collision portions 3. Further, the number of segment regions formed can be 5 or more.

  FIG. 21 shows an example in which the liquid processing member includes the upstream first liquid processing member 1 and the downstream and second liquid processing members 1 ′ arranged in series in the liquid flow direction. It is. The first liquid processing member 1 on the upstream side has a dissolved gas supply unit having the same configuration as that of FIG. 2, and the second liquid processing member 1 ′ has a structure in which the dissolved gas supply unit is omitted. It has become. The gas to be dissolved is supplied to the first liquid processing member 1, where the first stage gas is pulverized and dissolved, and the second liquid processing member 1 ′ is unreacted by the first liquid processing member 1. The dissolved gas to be dissolved is further pulverized and dissolved. By the plurality of liquid processing members 1 and 1 ′ connected in series, the gas to be dissolved is pulverized and dissolved in stages, and the gas dissolution efficiency can be greatly increased. Of course, the number of liquid processing members arranged in series can be three or more. A configuration in which the gas to be dissolved is distributed and supplied to each of two or more of the plurality of liquid processing members through different paths, for example, in FIG. 21, the second liquid processing member 1 ′ is provided with a gas to be dissolved supply section. It is also possible to replace the first liquid processing member 1 with the same one.

  In FIG. 22, the dissolved gas supply unit is configured as a gas injection nozzle 60 provided on the liquid inflow pipe 18 connected to the inlet of the member body 6. The gas injection nozzle 60 is formed as a well-known venturi tube, and the gas supply line 12 is connected to the gas suction hole 60h communicating with the throttle portion to supply the gas G to be dissolved and the liquid processing member 1 on the downstream side. It will be crushed and dissolved by '.

  On the other hand, in the liquid processing member 1 ″ of FIG. 23, a gas supply passage 3h is formed in the axial direction of the collision portion 3 (screw member), and a gas supply conduit 12 is connected to the gas supply passage 12 via a connector 11 here. In this case, the inner diameter of the gas supply passage 3h is contracted by the outer dimensions of the collision portion 3, but if the gas supply flow rate is insufficient, it is shown in FIG. As described above, it is possible to increase the gas supply amount by forming the same gas supply passage 3h in at least two of the plurality of collision portions 3 and distributing and supplying the gas to be dissolved.

  Further, as shown in FIGS. 25 to 27, the liquid circulation pipe 18 can be branched into a plurality of parts in the middle, and the plurality of liquid processing members 1 can be provided in parallel on the branched flow pipes. The dissolved gas supply unit is configured to supply the dissolved gas to at least one of the liquid processing members connected in parallel. By using a plurality of liquid processing members in parallel, a required amount of the gas to be dissolved can be efficiently dissolved even when the flow rate of the liquid to be processed is large.

  In FIG. 25, the liquid processing member 1 having the same configuration as that of FIG. 2 in which the dissolved gas supply unit is formed is provided in each of the branched flow pipes. For each liquid processing member 1, a gas supply pipe 12 connected to the same dissolved gas source (for example, gas cylinder) is branched and supplied to each liquid processing member 1. If each of the branched gas supply pipes 12 is provided with a flow rate adjusting valve 29 that individually adjusts the flow rate of the dissolved gas to be supplied, the supply of the dissolved gas according to the supply status of the liquid to each liquid processing member 1. It becomes possible to optimize the amount (however, it can be omitted). Further, as shown in FIG. 30, each liquid processing member 1 is individually connected to gas supply pipes 12 connected to different types of dissolved gas sources (for example, gas cylinders), and different dissolved gases G1 and G2 are connected to the liquid processing members 1, respectively. It can also be configured to dissolve and mix. At this time, by providing the flow rate adjustment valve 29 of each gas supply pipe 12 and adjusting the flow rate, the dissolution mixture ratio of the plurality of dissolved gases G1 and G2 can be changed.

  Further, as shown in FIG. 26, a plurality of liquid processing members 1 ′ that do not form a dissolved gas supply unit are distributed and arranged in parallel, and the gas injection nozzle 60 ( (See also FIG. 22). Dissolved gas can be uniformly distributed to each liquid processing member 1 '.

  On the other hand, as shown in FIG. 27, the dissolved gas supply unit only for a part (here, the liquid processing member 1 ′ on the lower side of the drawing) of the plurality of liquid processing members 1, 1 ′ distributed and arranged in parallel. (A gas supply pipe 12 + a gas injection pipe 10, similar to FIG. 2) may be provided to dissolve the gas to be dissolved and mix and discharge a liquid and an undissolved liquid. Further, as shown in FIG. 28, a plurality of sets of liquid processing members 1 and 1 'connected in series as disclosed in FIG. 21 can be branched and connected in parallel.

  FIG. 29 shows an example of a configuration in which the liquid to be dissolved is continuously supplied and dissolved while circulating the liquid. In this configuration, the water tank (or tank) 93 is filled with water, the fish F is bred in the water, and the water is filtered for dirt and the like by the filter 92, and the circulation line (liquid channel) is pumped by the pump 91. ) It circulates through 18. A liquid processing member 1 ′ having no dissolved gas supply unit is disposed on the circulation pipe 18, while a ceramic or resin (or a composite material of ceramic and resin) having a large number of continuous air holes in the water tank 93. ) Is provided, and oxygen (or) as a gas to be dissolved is supplied from a gas cylinder 96 through the gas supply pipe 12. Oxygen (air) bubbles from the diffused gas 95 are sucked into the circulation pipe 18 from the circulation outlet 93R of the water tank 93, guided to the liquid processing member 1 ', and crushed and dissolved. In addition, if the bubble collection part which covers this diffused gas 95 with the circulation outlet 93R is provided in the water tank 93, oxygen (air) bubbles from the diffused gas 95 can be led into the circulation pipe line 18 without any excess. And oxygen dissolution efficiency can be improved. With this configuration, the oxygen dissolution efficiency can be significantly increased as compared to the conventional aeration system using a diffused gas, and the amount of oxygen to be used can be reduced and the breeding density of fish in the aquarium can be increased.

  The dissolved gas source is not limited to the cylinder as in the above-described various embodiments. For example, as shown in FIG. 31, the atmosphere A is dissolved in the dissolved gas source by the pressure reducing effect in the throttle portion of the liquid processing member 1. It can also be configured to supply self-priming as In this case, if the ozonizer 28 is provided in the middle of the gas supply pipe 12, it is possible to ozonize part of the oxygen in the air to be sucked and supply it as the supply gas.

DESCRIPTION OF SYMBOLS 1,1 Liquid processing member 2c Restriction part 2e Segment area | region 2n Inlet 2x Outlet 3,30,30 ', 130 Colliding part 5t Conical part 5r Restriction rib 6 Member main body 12 Gas supply line (dissolved gas supply part)

Claims (10)

An inflow end that is a liquid inflow side and an outflow end that is a liquid outflow side are defined, and a liquid flow path that connects an inflow opening that opens to the inflow end and an outflow opening that opens to the outflow end is formed in a penetrating configuration. And a member main body in which a throttle part having a smaller flow cross-sectional area than the inflow port is formed at an intermediate position of the flow path, and a mode in which the axial cross section of the flow path is divided into two or more segment regions by the throttle part A liquid hydraulic member that has a collision portion that protrudes from the inner peripheral surface of the flow path and has a plurality of circumferentially drawn throttle ribs on the outer peripheral surface and further reduces the flow path cross-sectional area of the throttle portion;
A to-be-dissolved gas supply section for allowing a to-be-dissolved gas to flow from a gas supply source located outside the member body into the liquid flow path of the member body,
After the liquid flow supplied to the inflow end of the member main body of the liquid physical member collides with the collision part, the liquid flow is accelerated and passed while being distributed to each segment region, and the liquid flow member is directly connected to the collision part. A gas dissolving apparatus characterized in that the gas to be dissolved is entrained in a turbulent flow region formed downstream, mixed, pulverized and dissolved. 2. A high-speed flow gap that further speeds up the liquid flow in the constricted portion is formed between the tip portions of two or more of the plurality of colliding portions protruding from the inner peripheral surface of the constricted portion. The gas dissolving apparatus as described. The gas dissolving apparatus according to claim 1, wherein the collision portion is formed by the throttle portion so as to divide an axial cross section of the liquid flow path into three or more segment regions. The high-speed flow gap which further speeds up the liquid flow in the said throttle part is formed between the front-end | tip parts of two or more things of the said some collision part which protrudes from the said internal peripheral surface of the said throttle part. The gas dissolving apparatus as described. A conical portion that reduces the axial cross section toward the distal end is formed at the distal end portion of the collision portion, and the two collision portions adjacent to each other with the segment region interposed between the outer peripheral surfaces of the conical portions. The gas dissolving apparatus according to claim 2, wherein a slit portion constituting the high-speed flow gap is formed. The dissolved gas supply part is formed in the wall part of the member main body on the upstream side of the collision part, and one end opens as a gas outlet on the inner peripheral surface of the liquid passage, and the other end is the member main body. The gas dissolving apparatus of any one of Claim 1 thru | or 5 provided with the gas supply path opened as a to-be-dissolved gas supply port in the outer surface of this. The gas dissolving device according to claim 6, wherein the gas outlet of the gas supply passage is opened to the throttle portion. The gas dissolving apparatus according to any one of claims 1 to 5, wherein the dissolved gas supply unit is a gas injection nozzle provided on a liquid inflow pipe connected to the inlet of the member main body. . The liquid processing member includes an upstream first liquid processing member and a downstream and second liquid processing member arranged in series in the liquid flow direction, and the dissolved gas supply unit includes: The dissolved gas is supplied to the first liquid processing member, and the second liquid processing member further pulverizes and dissolves the undissolved dissolved gas in the first liquid processing member. The gas dissolving device according to any one of claims 1 to 8, wherein The liquid flow pipe is branched into a plurality of parts in the middle, and a plurality of the liquid processing members are provided in parallel on the branched flow pipes, and the dissolved gas supply unit is connected in parallel to the liquid processing member. The gas dissolving apparatus according to any one of claims 1 to 9, wherein the gas to be dissolved is supplied to at least one of the above.

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