JPH084799B2 - Aeration device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aeration device for efficiently aeration by mixing and agitating sewage and other liquids such as air or a gas such as oxygen gas.

[0002]

2. Description of the Related Art Dead leaves and other organic substances flow into closed water bodies such as aquaculture ponds, ponds, other ponds provided in golf courses, lakes and marshes, which decompose anaerobically and produce a foul odor. The water quality is polluted by the inflowing substance, and water-bloom etc. are generated. Especially in aquaculture ponds, it is important to purify water quality. For this reason, in the aquaculture pond, a stirrer is installed on the pond to stir the water surface and forcibly make contact between water and air. In addition, since the water is not stirred in the pond in the golf course, the quality of the water is deteriorated by the inflowing organic matter, and a bad odor is emitted.

[0003]

Conventionally, as a water agitator, a screw is arranged on the surface of water or in water and is rotated by a power machine. For this reason, it has a drive part in water or a place where water is immersed, and the drive part is easily damaged by water or impurities in the water, and it is necessary to perform regular inspection and maintenance. Further, in the method of stirring water, it is known that when air taken into water is crushed to form bubbles, the finer the bubbles of the air are, the more the solubility is improved. However, in the method of stirring water with a screw, there is a limit to miniaturization.

An object of the present invention is to use a simple apparatus and to make the gas mixed in the liquid into an extremely small size of several tens of μ or less to increase the dissolved ratio of oxygen and perform efficient aeration. .

[0005]

The present invention has been made to achieve the above object, and one or a plurality of fluid discharge nozzles having ring-shaped discharge nozzle holes are arranged in series in a casing. The cylindrical nozzle is located at one end on the extension line of the longitudinal axis of the fluid discharge nozzle, and the cylindrical nozzle is projected on the side surface of the casing so that the discharge flow is in the fluid discharge nozzle.
A hose that supplies high-pressure water to the fluid nozzle in the casing and the tubular nozzle is connected, and a slit nozzle that discharges gas is formed on the outer peripheral portion of the tip of the tubular nozzle in the casing tubular portion, and the gas is discharged by high-pressure water. It is crushed, pulverized to several tens of microns or less, mixed with air, and jetted together with high-pressure water into wastewater for aeration. The fluid discharge nozzle having a ring-cone-shaped discharge nozzle hole and a cylindrical nozzle arranged in series at one end on the extension line of the longitudinal axis of the fluid discharge nozzle are used to control the discharge flow of the cylindrical nozzle. A cylindrical nozzle is provided on the side surface of the fluid discharge nozzle so as to be inside the fluid discharge nozzle, and a fluid discharge nozzle and a hose for supplying high-pressure water to the cylindrical nozzle are connected, and a small-diameter pipe at the tip of the cylindrical nozzle. Part is inserted into the inner peripheral nozzle of the fluid discharge nozzle with a gap, and a small hole for sucking gas from the air chamber is punched in the outer peripheral part of the tubular nozzle small diameter tube part, and the gas is discharged from the air chamber. The high-pressure water supplied from the inner and outer peripheral portions of the cylindrical nozzle and discharged from the inner and outer peripheral portions of the cylindrical nozzle is crushed into fine particles to mix them, and the mixture is injected into the water together with the high-pressure water for aeration. Furthermore, a swivel frame is provided on the outer periphery of the lower part of the column for supplying high-pressure water so that the swivel frame is provided with rotary joints for gas and fluid, and a plurality of aerators are attached to this swivel frame, and each aerator is ringed. One or a plurality of fluid discharge nozzles each having a discharge nozzle hole are arranged in series in the casing, positioned at one end on the extension line of the longitudinal axis of the fluid discharge nozzle, and discharge the discharge flow. A cylindrical nozzle is formed so as to project inside the nozzle so as to protrude from the side surface of the casing, and each aeration device is connected to a gas rotary joint and a fluid rotary joint with a hose to supply gas and liquid. In order to efficiently perform aeration and agitation of sewage, the aeration device is swung together with the swivel frame by using the reaction force generated by the liquid discharge of the aeration device. To.

[0006]

One or a plurality of fluid discharge nozzles each having a ring-shaped discharge nozzle hole are arranged in series in the casing, and the fluid discharge nozzles are positioned at one end on the extension line of the longitudinal axis of the fluid discharge nozzles and discharge. A cylindrical nozzle is projected on the side surface of the casing so that the flow is inside the fluid discharge nozzle, and air or gas is sucked from the slit nozzle on the outer peripheral portion of the cylindrical nozzle.
Or jet it. For this reason, the gas is crushed by a plurality of stages of high-pressure water to be atomized into several tens of μ or less, and is mixed with the liquid in the wastewater at a high speed and discharged, so that the oxygen dissolution rate is improved and the aeration is more effective. In addition to being able to perform, stirring by the discharge pressure can also be performed.

[0007]

EXAMPLE An aeration apparatus of the present invention will be described based on the illustrated example. In the figure, 1 is a casing of the aeration device body,
A flange 2 is attached to one side surface of the casing 1 by screwing or another method, and one or a plurality of liquid discharge nozzles 3A, 3B ... Are fitted into the cavity 1R of the casing 1, and the fluids are arranged in series. When attaching the flange 2 to the casing 1, the discharge nozzles 3A, 3B ... Are sandwiched between the two, and a water supply pipe 4 for supplying water or liquid is connected to the outer surface of the casing 1.

A cylindrical portion 21 is integrally formed in the central portion of the flange 2 or is provided in a projecting manner, and the longitudinal axis of the cylindrical portion 21 and the liquid discharge nozzles 3A fixed in the casing.
3B ... are arranged so as to be aligned with the longitudinal axis, and the tubular nozzle 5 is fitted and fixed in the tubular portion 21 of the flange 2, and the rear end of the tubular nozzle 5 and the casing 1 A hose 7 is connected between the water distribution joints 6 projecting from the above, so that the excess water or liquid supplied into the casing 1 is supplied to the tubular nozzle 5.

In the tubular portion 21, a concave annular air chamber 21R is formed in the central outer peripheral portion of the tubular nozzle 5. This makes the outer peripheral portion of the portion of the tubular nozzle 5 fitted into the tubular portion 21 have a required capacity, and the tubular portion 21 is supplied to supply air, oxygen, or other gas into the air chamber 21R. And an air supply pipe 8 for supplying air or the like to the air chamber 21R is connected to the tubular portion 21. A flow rate adjusting valve 9 is provided in the middle of the air supply pipe 8 so that the amount of air supplied to the air chamber 21R via the air supply pipe 8 can be adjusted.
Open the tip of the to the atmosphere or connect to an oxygen cylinder or other gas cylinder.

An injection pipe 10 having a required length and diameter is connected to the side of the casing 1 opposite to the tubular nozzle 5, that is, at the center of the side surface of the casing 1. The longitudinal axis of the injection pipe 10 and the tubular nozzle 5 are connected. The longitudinal axes of the fluid discharge nozzles 3A and 3B are aligned on the same axis, that is, on the same axis.

Since the liquid discharge nozzles 3A, 3B, ... Arranged in the casing 1 have the same structure, the structure of one of the discharge nozzles 3A will be described with reference to FIG. The liquid discharge nozzle 3A is an inner peripheral nozzle piece 3 having a required conical cylindrical shape.
1 and an outer peripheral nozzle piece 32 that fits this, and this material is made of a required metal such as various steels and non-ferrous metal steels that is resistant to rust against water etc., and synthetic resin according to the application. To be done.

The inner peripheral nozzle piece 31 has an outer peripheral surface having a conical shape having a required inclination angle, a straight tubular inner hole 31a is bored therein, and the outer peripheral nozzle piece 32 has an inner peripheral nozzle piece 3 therein.
The concave groove 32a is formed over the entire inner circumference of the substantially central portion of the conical surface into which the 1 is fitted. The groove 32a is formed in the shape of a square arc, a rectangular groove, or any other desired cross-sectional shape and size, and is formed on both side surfaces of the groove with the groove 32a sandwiched therebetween. One of the opposing surfaces 32b is brought into contact with the outer peripheral surface of the inner peripheral nozzle piece, and is tightly fitted as shown in FIG. 5, screwed or otherwise integrated with the inner peripheral nozzle piece. It is held so that a gap is formed between the opposing surface 32c on the other side surface and the taper-shaped outer peripheral surface of the tip end portion of the inner peripheral nozzle piece 31, and this gap is formed in the ring-shaped nozzle hole 3
Set to 3. The nozzle hole 33 is formed into a desired cone angle by slightly inclining the shape of the outer peripheral surface 31b of the inner peripheral nozzle piece, for example, the center line of the nozzle hole as shown in the drawing.

Further, the outer peripheral nozzle piece 32 has a concave groove 3 formed at substantially the center of the inner peripheral surface thereof over the entire length of the inner peripheral surface.
A plurality of water supply holes 32h shown in FIG. 2 are bored along the outer periphery of the groove 32a at required intervals so that a fluid such as high-pressure water can be supplied from the casing 1 while giving a swirling flow to the inside of 2a. Thus, water can be supplied from the fluid supply pipe 4 joined to the casing while swirling the fluid into the concave groove 32 through the water supply hole 32h formed in the tangential direction of the concave groove 32a.

A ring-shaped nozzle main body A in which the inner and outer peripheral nozzle pieces 31, 32 are integrated is used as one unit as shown in FIG. 5, and this is used as a unit at the base end portion of the pressure feed pipe or the mixing pipe or in the middle thereof. When joining, this peripheral nozzle piece 3
An O-ring fitting groove may be formed on the contact surface between the 2 and the flange or the retainer, and the O-ring may be fitted into the groove to seal the groove.

The nozzle bodies 3A and 3B may have the same diameter, or may have different diameters.
Further, although one pump is used in the above-mentioned embodiment, the jet water from the tubular nozzle 5 and the jet water from the liquid discharge nozzles 3A and 3B can be supplied from separate pumps.

The operation of the basic type of the aeration apparatus of the present invention constructed as described above will be described below. When water is supplied into the main body casing 1 from the water supply pipe 4 at a predetermined pressure by a pump, the water is guided into the circular cavity 1R in the casing, and the liquid discharge nozzles 3A, 3 arranged in the cavity are introduced.
High pressure introduced into the nozzles 3A, 3B through holes tangentially drilled on the outer peripheral surface of B and inside the concave groove, discharged at high speed from the ring-shaped nozzle, and supplied into the cavity 1R. Excess water that was not introduced into the liquid discharge nozzle passes through the water distribution joint 6 and the hose 7, and then passes through the tubular nozzle 5
Will be supplied with water.

The high pressure water supplied to the cylindrical nozzle 5 is
The liquid is ejected from its tip at a high speed to the central portion of the liquid ejection nozzle 3A arranged on the same chamber axis. At this time, a ring-shaped slit nozzle 5N is formed on the outer periphery of the tip end of the cylindrical nozzle, and the slit nozzle 5N
Since the air chamber 21R and the air chamber 21R are electrically connected to each other, the negative pressure generated at the nozzle tip portion causes the air chamber 21R from the nozzle 5N.
The air or gas therein is sucked and discharged while swirling, is crushed and mixed by the high-pressure water discharged from the tubular nozzle 5, and is ejected as fine bubbles.
The jet amount of air or gas is adjusted to the optimum amount by operating the flow rate adjusting valve 9.

When the high-pressure water from the cylindrical nozzle 5 and the air sucked from the slit nozzle 5N are crushed and mixed and discharged into the liquid discharge nozzle, they flow down in the fluid discharge nozzle and have a ring shape. The high-pressure water discharged from the nozzle further breaks the air into smaller pieces. This is made finer by a fluid discharge nozzle provided in one or two or more stages in the casing to a size of several tens of μ or less and mixed with high-pressure water, that is, air is dissolved in the high-pressure discharge water to form an injection pipe. It is discharged into water via 10 and mixed and agitated sewage at this discharge pressure while supplying and dissolving air in the sewage to perform desired aeration.

In this case, the tip of the injection pipe 10 is opened directly into the dirty water, but a fluid discharge nozzle (not shown) for acceleration may be connected in order to further increase the jetting output of the high pressure discharge water. it can. This accelerating fluid discharge nozzle adopts the same structure as that provided in the casing,
Other formats may be used.

The above basic type of the aeration apparatus of the present invention is installed by immersing it in the desired aeration tank or the dirty water in the pond, but it may be hung or installed at the bottom. It is also possible to attach two or more of this basic type aeration device to the swivel frame so as to stir the sewage at the same time.

In the embodiment shown in FIGS. 3 and 4, two of the basic type aerators shown in FIG. 1 are symmetrically attached to the revolving frame 11. The swivel frame 11 has a pillar 12 penetrating through the center thereof and is supported by a fixed boss 13 fixed at a predetermined position of the pillar 12 so that the swivel frame 11 can swivel around the pillar 12 as an axis. 11 is provided with two aerators symmetrically. In this case, three aerating devices can be attached if the revolving frame 11 is Y-shaped, and four aerating devices can be attached if the revolving frame 11 is cruciform. Furthermore, by changing the shape of the swivel frame, it is possible to install five or more aeration devices with one swivel frame.

A gas rotary joint 14 and a liquid rotary joint 15 are rotatably attached to the outer periphery of the column 12 at a position above the swivel frame, and the gas rotary joint 14 is provided with the hoses 8 of the respective aeration devices. Connected and rotary joint for liquid 15
The water supply pipe 4 of each aeration device is connected to the aeration device, and the rotary joints 14, 1 are connected to the respective aeration devices that perform a turning motion.
The gas and liquid are supplied while the swirling unit 5 swirls in synchronization with the swirling frame.

The gas rotary joint 14 is composed of a fixed side and a movable side. Air or gas is supplied to the fixed side 14H through the hose 16 into the joint 14H, and is synchronized with the revolving frame through the ventilation hole. The movable side 14L that swirls around is vented, and the hose 8 is connected to the movable side 14L. The fixed side 14H and the movable side 14L are hermetically slidably combined.

High-pressure water is supplied to the liquid rotary joint 15 through the pipe-shaped support 12 and through the holes 12H drilled in the support. Therefore, the liquid rotary joint 15 is rotatably supported by the column on the outer periphery of 12H in this hole, and the hose 4 is connected to the rotary joint 15 so that water can be supplied to each aeration device.

When high pressure water is supplied from the inside of the supporting column to the aerator provided on the supporting column 12 so as to be freely rotatable, and gas is supplied through the hose 16 and the rotary joint 14,
When the mixed fluid, which has become ultrafine bubbles, is discharged from the injection pipe 10 in the same manner as in the embodiment, the swivel frame swivels due to its reaction force. By the jetting of the mixed air fluid and the turning of the turning frame, the waste water is aerated and mixed and stirred.

In the second embodiment, the support column 12 may be of a hanging type, but in order to mount it on the tank or the pond bottom, the lower end of the support column 12 is placed on the tank bottom or the like as shown in FIG. It is supported by a fixed plate 17 fixed to.

A laminar flow pipe 20 having a diameter larger than the outer diameter of the injection pipe 10 is fitted on the injection pipe 10 protruding from the casing 1,
Project the required length from the tip of the injection pipe. The inner diameter of the laminar flow pipe 20 is appropriately determined so as to have a required gap from the outer diameter of the injection pipe, and a negative pressure is applied to the laminar flow pipe by a mixed fluid of high-pressure water and gas injected from the injection pipe into the laminar flow pipe. Occurs,
Due to this negative pressure, the water in the pond or tank is sucked through the gap on the base end side of the laminar flow pipe, and is further mixed with the high-pressure water jetted from the jet pipe and the mixed fluid of the gas to flow down at high speed in the laminar flow pipe. However, this further improves the mixing and stirring efficiency.

The embodiment shown in FIG. 6 uses one of the liquid discharge nozzles 3A formed by fitting the inner peripheral nozzle piece 31 and the outer peripheral nozzle piece 32 shown in FIG. , F2, and the fixing bolt B to integrate them, and the tubular nozzle 5 is fitted and fixed in the tubular body projecting to the outer surface of the one flange F1 and projecting to the tip of this tubular nozzle 5. The small diameter tube 51 is inserted into the inner peripheral nozzle piece 31.

An air chamber R is formed between the inner peripheral surface of the cylindrical body of the flange F1 and the outer peripheral surface of the small diameter tube 51 of the cylindrical nozzle, and air is supplied from the air supply hose 8 connected to the flange F1. Air is supplied into the chamber R, and a gap 3H is formed between the small-diameter pipe 51 and the inner peripheral surface of the inner peripheral nozzle piece 31 over the entire circumference in the circumferential direction of the inner peripheral nozzle piece 31. The air supplied to the air chamber by making 3H conductive is the gap 3H.
After that, air is discharged from the ring-shaped slit nozzle 5N at the tip of the inner peripheral nozzle piece. A small hole 5H drilled in the small diameter tube 51 of the tubular nozzle 5.
1 is also applied to the embodiment shown in FIG. 1, and it is desirable that the small hole 5H be formed near the position where the inner diameter of the tubular nozzle 5 is small.

Further, one or more small holes 5H are bored on the outer peripheral surface of the small-diameter pipe 51 in the air chamber, and a part of the air in the air chamber R is also supplied into the small-diameter pipe through the small holes 5H. Do as you would.

Water is supplied to the water supply pipe 4 connected to the cylindrical nozzle 5 and the liquid discharge nozzle 3A at a required pressure, but this is performed by the same pump or a separate pump, and the water supply pipe 4 and the inside of the outer peripheral nozzle piece 32 are supplied. Water is supplied into the concave groove 32a from a water supply hole opened in the tangential direction.

The injection pipe 10 is connected to the other flange F2 so as to be coaxial with the liquid discharge nozzle 3A. With this configuration, when high-pressure water is supplied from the cylindrical nozzle, it is discharged from the tip of the small diameter tube 51. At this time, a part of the air in the air chamber R, which has a negative pressure than that in the small-diameter pipe, is sucked into the small-diameter pipe through the small holes 5H, and is crushed when flowing down in the small-diameter pipe to form fine bubbles to form a pipe tip. The air is further mixed with the high-pressure water and discharged, and the air is discharged from the slit nozzle 5N through the gap 3H on the outer circumference of the small-diameter pipe. At this time, since the high-pressure water is also ejected in the cone shape from the ring-shaped nozzle of the liquid ejection nozzle 3A, the air ejected from the nozzle 5N and the bubbles from the small diameter tube are ejected in the cone shape from the nozzle 33. The high-pressure water and the high-pressure water sprayed from the tip of the small-diameter pipe 51 at the center of the nozzle 33 are crushed to form ultrafine bubbles of several tens of μ or less, which are completely mixed with the high-pressure water and flow down through the spray pipe 10 to reach the tip. Is ejected.

The air supplied by this method becomes ultra-fine bubbles, and the jetted water becomes cloudy or almost transparent, and in the conventional aeration method, the bubble diameter is several hundred μ at most, which is far more than that. It becomes a small number of 10 μm or less and the solubility of oxygen is further improved. In this case, the high pressure water supplied to the water supply pipe 4 and the cylindrical nozzle 5 may have the same pressure or different pressures. Further hose 8
The air is supplied by a high-pressure water jet from the tip nozzle of a small-diameter pipe and a liquid discharge nozzle by using the negative pressure generated in the air chamber by the Venturi effect, but a larger amount of air is supplied. Therefore, pressurized air can be supplied by connecting an air blower.

The embodiment shown in FIG. 7 is a modification of the embodiment shown in FIG. 1, in which two liquid discharge nozzles 3A and 3B are arranged adjacent to each other on the same axis, and a cylindrical nozzle 5 is provided on one side surface thereof. The point that the ejection pipes 10 are arranged on the other side is the same as in the first embodiment, but the small-diameter pipe 51 of the tubular nozzle 5 penetrates the first liquid ejection nozzle 3A and the second liquid ejection nozzle 3B. Of the first liquid ejecting nozzle 3A and the second liquid ejecting nozzle 3B at the outer end portions of the end portions of the first liquid ejecting nozzle 3A and the second liquid ejecting nozzle 3B having a radial or other shape as shown in FIGS. 9 to 11. 3 m is formed, and a part of the water supply supplied from the water supply pipe 4 is passed through the water flow groove 3 m to form a ring-shaped nozzle hole 33.
The embodiment is different from the embodiment of FIG. 1 in that water is supplied to the outer peripheral surface of the mixed fluid of water and gas that is further discharged.

As shown in FIGS. 9 and 10, the water supply groove 3m has a plurality of radially shallow grooves formed on the side surface of the outer peripheral nozzle piece 32 so as to introduce a part of the water supply to the cavity 1R. Water is supplied as a swirling flow to the outer peripheral portion of the nozzle hole 33, or a shallow circular groove is formed on the side surface of the outer peripheral nozzle piece 32 as shown in FIG. 11, and the outer peripheral nozzle piece 3 is provided in this shallow groove.
A part of the water supply is guided through the second groove 32a.

Nozzle holes 3 of liquid discharge nozzles 3A and 3B
The mixed fluid discharged at a pressure higher than 3 causes a negative pressure in the outer peripheral portion of the mixed fluid at a position immediately after it comes out of the nozzle hole 33.
The air bubbles atomized by the nozzle are separated from the fluid by this decompression, and the dissolved rate of oxygen decreases. However, it is possible to prevent negative pressure generation, that is, decompression by supplying water from the outer peripheral portions of the outlets of the first liquid ejecting nozzle 3A and the second liquid ejecting nozzle 3B so as to wrap the outer peripheral portions of the mixed fluid. Therefore, the first liquid discharge nozzle 3A and the second liquid discharge nozzle 3A
Since the fine bubbles of the mixed fluid are not separated from the liquid even in the outer peripheral portion of the outlet of the liquid discharge nozzle 3B, the air is further fined to 20 μm or less, and the oxygen dissolution efficiency is improved.

Further, as described above, the outer peripheral portion immediately after exiting the second liquid discharge nozzle 3B is supplied with water and also sucked. As shown in FIG. 8, this is an air chamber 1A in the casing 1.
Is formed and air is supplied to the air chamber 1A through the air supply pipe, and air is supplied from the air chamber 1A into the injection pipe 10 through the slit nozzle 1N provided on the inner peripheral surface of the casing. The amount of supplied air is increased.

Further, in the embodiment shown in FIG. 1 or FIG. 6, when another pipe P is obliquely connected to the injection pipe 10, a negative pressure generated in the pipe P by the high pressure water flowing down the injection pipe 10 at high speed. Can be used to transport other substances. in this case,
As shown in FIG. 12, a liquid discharge nozzle is further arranged on the same axis as in the embodiment shown in FIG. 1 or FIGS. 6 and 7 to further increase the discharge pressure. P
Connect to join. By applying this action, it can be used as a pump or a dredge pump, for example. Since this operation is almost the same as the embodiment shown in FIGS. 1, 6 and 7, detailed description thereof will be omitted.

[0039]

According to the aeration apparatus of the present invention, one or a plurality of fluid discharge nozzles each having a ring-shaped discharge nozzle hole are arranged in series in a casing, and the fluid discharge nozzle is extended along the longitudinal axis. At the one end, a cylindrical nozzle is projected on the side surface of the casing so that the discharge flow is in the fluid discharge nozzle, and the fluid nozzle in the casing and the hose for supplying high-pressure water to the cylindrical nozzle are connected, In addition, a slit nozzle that discharges gas is formed on the outer peripheral portion of the tip of the cylindrical nozzle in the casing cylinder part, and the gas is discharged and crushed by high pressure water to atomize and mix, and aeration is performed by injecting the high pressure water into the wastewater together with the high pressure water. Since air or gas sucked into water is miniaturized to a few tens of μ or less, the solubility of gas is improved, the aeration efficiency is dramatically improved compared to the conventional one, and there is no rotating part in the water. No breakdown The aeration device can be swung together with the swivel frame by using the reaction force generated by the liquid discharge from the aeration device, and the aeration device is strongly agitated while aeration the sewage. There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is a sectional view showing a basic form of an aeration apparatus of the present invention.

FIG. 2 is a vertical sectional side view taken along line XX of FIG.

FIG. 3 is a plan view of a second embodiment of the aeration device of the present invention.

FIG. 4 is a front view in which the rotary joint portion is cut away.

FIG. 5 is an explanatory diagram of a fluid discharge nozzle of the aeration device of the present invention.

FIG. 6 is a sectional view of a third embodiment of the aeration apparatus of the present invention.

FIG. 7 is a sectional view of a fourth embodiment of the aeration apparatus of the present invention.

FIG. 8 is an explanatory view showing a cross section of the slit nozzle portion.

FIG. 9 is a cross-sectional view of another embodiment of the liquid discharge nozzle.

FIG. 10 is a side view of FIG. 9.

FIG. 11 is a cross-sectional view of another embodiment having a different liquid discharge nozzle.

FIG. 12 is a sectional view of a fifth embodiment of the aeration apparatus of the present invention.

[Explanation of symbols]

 1 Casing 1N Slit Nozzle 1A Air Chamber 2 Flange 21 Cylinder 21R Air Chamber 3A, 3B Fluid Discharge Nozzle 31 Inner Circumferential Nozzle Piece 32 Outer Circular Nozzle Piece 33 Nozzle Hole 4 Water Supply Pipe 5 Cylindrical Nozzle 5N Slit Nozzle 7, 16 Hose 8 Feed Trachea 9 Flow rate control valve 10 Injection pipe 11 Swivel frame 12 Strut 14 Gas rotary joint 15 Liquid rotary joint 20 Laminar flow pipe F1, F2 Flange R Air chamber 51 Small diameter pipe part of cylindrical nozzle 5H Small hole

Claims (4)

[Claims] 1. One or a plurality of fluid discharge nozzles each having a ring-shaped discharge nozzle hole are arranged in series in a casing, and the fluid discharge nozzle is located at one end on an extension line of the longitudinal axis of the fluid discharge nozzle. In addition, a cylindrical nozzle is projected on the side surface of the casing so that the discharge flow is in the fluid discharge nozzle, and the fluid nozzle in the casing and the hose for supplying high-pressure water to the cylindrical nozzle are connected, and the cylindrical nozzle tip A slit nozzle that discharges gas to the outer peripheral portion is formed in the casing cylinder part, and the gas is crushed and finely atomized by high-pressure water to be mixed and mixed, and is aerated by injecting into the water together with the high-pressure water. Aeration device. 2. A fluid discharge nozzle having a ring-cone-shaped discharge nozzle hole, and a cylindrical nozzle arranged in series at one end on the extension line of the longitudinal axis of the fluid discharge nozzle,
The tubular nozzle is provided on the side surface of the fluid ejection nozzle so that the ejection flow of the tubular nozzle is inside the fluid ejection nozzle, and the fluid ejection nozzle and the hose for supplying high-pressure water to the tubular nozzle are connected, and The small-diameter pipe portion at the tip of the cylindrical nozzle is inserted into the inner peripheral nozzle of the fluid discharge nozzle with a gap, and a small hole for sucking gas from the air chamber is bored in the outer peripheral portion of the cylindrical nozzle small-diameter pipe portion. At the same time, the gas is supplied from the air chamber from the inside and outside of the cylindrical nozzle and crushed into fine particles by high-pressure water discharged from the inner and outer circumferences of the cylindrical nozzle, and mixed to be injected into the water together with the high-pressure water for aeration. Aeration device characterized by what is done. 3. Two liquid discharge nozzles each having a ring-shaped discharge nozzle hole are arranged adjacent to each other on the same axis, and a cylindrical nozzle is arranged on one side surface and an injection pipe is arranged on the other side surface. At the same time, the small-diameter tube of the cylindrical nozzle is made to penetrate the first liquid discharge nozzle 3A and reach the center or the tip of the second liquid discharge nozzle. Radial and other shapes of flowing water grooves are formed on the outer surface of the end portion of the nozzle, and a part of the water supply supplied from the water supply pipe is separated from the water and gas discharged from the ring-shaped nozzle hole through the flowing water groove. Water is not supplied to the outer peripheral surface of the mixed fluid, and the outer peripheral portion of the mixed fluid that comes out from the outer peripheral portion of the outlet of the liquid discharge nozzle is wrapped to prevent decompression that occurs in the outer peripheral portion of the mixed fluid, and the gas is crushed with high-pressure water. To improve the dissolution efficiency An aerating device characterized by injecting into aerate and aerating. 4. A swivel frame is rotatably provided on the lower outer periphery of a column for supplying high-pressure water with a rotary joint for gas and a fluid, and a plurality of aerators are attached to the swivel frame. An aerator is provided with one or a plurality of fluid discharge nozzles having ring-shaped discharge nozzle holes arranged in series in a casing, and is located at one end on the extension line of the longitudinal axis of the fluid discharge nozzle, and discharges. The nozzle is formed by projecting a cylindrical nozzle on the side surface of the casing so that the flow is in the fluid discharge nozzle, and each aeration device is connected to the gas rotary joint and the fluid rotary joint by a hose to form a gas. In addition, the liquid is supplied, and the aeration device is swung together with the swiveling frame by using the reaction force generated by the liquid discharge of the aeration device to perform aeration and agitation of the dirty water. An aeration device characterized by the above.