JPH08206680A - Aerator for oxidation ditch - Google Patents

Abstract

PURPOSE: To provide an aerator with which water purification can be carried out further actively and effectively. CONSTITUTION: This aerator is one installed in an object pond for treatment, e.g. an oxidation ditch, etc., to actively supply air in the object water 6 for treatment and mix air in the water. The aerator is provided with a rotating member 3, a driving means 5 to rotate the rotating member 3, an air generating means 8, an air ventilating means 7 to ventilate air along the inside and/or the outside of the rotating member 3, and a plurality of jetting out means 10 projecting out of the outer circumference of the rotating member 3 and provided with jetting-out outlets 12 to jet out air from the air generating means 7 to the object water 6 for treatment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerator for an oxidation ditch, which can be used for other treatment ponds requiring water purification such as an oxidation ditch.

[0002]

2. Description of the Related Art For example, in an oxidation ditch, an aerator is constructed so as to purify water by mixing sewage (treated water) with air.

[0003]

By the way, in the conventional aerators, a large number of blades are projected on the outer periphery of the rotating shaft supported in the shape of the horizontal axis by utilizing the peripheral wall of the oxidation ditch, and these blades are provided. Was configured to rotate continuously over the water from above the water surface. With this method,
The mixture of air remained passive, and we could not purify the water.

The present invention has been made to solve the above problems, and an object thereof is to provide an aerator for an oxidation ditch, etc., in which water purification is more positively and effectively performed. Especially.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is installed in a treatment pond such as an oxidation ditch to positively supply and mix air into the water to be treated. An aerator of, wherein the rotating member, a driving unit for rotating the rotating member, an air generating unit, and a unit for flowing air from the generating unit along the inside and / or the outside of the rotating member, A plurality of jetting means with a jetting port is provided which is provided on the outer circumference of the rotating member so as to jet the air from the air generating means into the water to be treated.

According to a second aspect of the present invention, in the first aspect, the ejecting means is of a type that appears and disappears at the boundary of the water surface by rotation, and the ejecting means is provided between the air generating means and the ejecting means. Is configured so that the air is ejected only within a certain range in which the ejection port is below the water surface.

The invention according to claim 3 is the invention according to claim 1 or 2.
In the jetting means, water can be introduced and the introduced water can be jetted together with air from the jet outlet.

According to a fourth aspect of the present invention, in the second aspect, through holes for air are arranged in the circumferential direction of the rotary member, and jet pipes serving as jet means are provided so as to communicate with the holes. In addition, a non-rotating air distribution pipe is passed through the rotating member, and a communication hole communicating with the rotating through hole is formed at a lower peripheral portion of the distribution pipe.

According to a fifth aspect of the present invention, in the second aspect, the rotating member is rotatably supported by a fixed type supporting member, and air is generated in a hole for supporting the rotating member of the supporting member. While a hole for introducing air from the means from below is formed, an air passage hole is arranged in the circumferential direction of the rotating member, and an ejection pipe as an ejection means is projected so as to communicate with the hole. In addition, an air passage that is divided in the circumferential direction and communicates with each of the jet pipes is formed on the inner circumference of the rotary member, and a support is provided on the peripheral portion of the portion corresponding to the support member of the rotary member. A hole that communicates by rotation with the introduction hole of the member is formed.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the drive means uses the power of the air generating means as a drive source.

According to a seventh aspect of the present invention, in the second aspect, the hole for introducing air into the ejection pipe of the ejection means is:
The valve is openable and closable, and its control is provided outside the ejection pipe so that the hole is opened when the water is below the water surface by the rotation of the pipe, and the hole is closed when the water is above the water surface.

According to an eighth aspect of the present invention, in the second aspect, an air piston that vertically reciprocates according to gravity is provided in the ejection pipe of the ejection means.

According to a ninth aspect of the present invention, in the eighth aspect, the air piston has a ball shape.

[0014]

The present invention will be described in detail below with reference to the illustrated embodiments. 1 and FIG. 2, which is a sectional view taken along the line II-II in FIG. 1, show an embodiment of the present invention, in which an oxidation ditch is equipped with an aerator.
It is also applicable to rectangular or circular sedimentation basins and sand basins, as well as aeration tanks, general ponds, and reservoirs.

Reference numeral 1 denotes a side wall of the oxidation ditch, which is a plane shape shown in FIG. 13 or left and right side walls of the oxidation ditch having another shape. Bearings (supporting members) 2 are fixed on both side walls 1 so as to face each other, and a cylindrical rotating member 3 is supported between the bearings 2 and 2. The rotary member 3 is driven by a motor 5 with a speed reducer via a rotary joint 4. As shown in FIG. 2, the rotation direction thereof is a direction reverse to the flow direction X of the circulating water 6 which is the water to be treated.

A cylindrical air circulation pipe 7 is fixedly passed through the rotary member 3 from one side, and a blower which is an air generating means installed inside the pipe 7 through one side wall 1. 8 or a compressor is connected. The air from the blower 8 is sent into the pipe 7, and is guided to a lower portion thereof through a communication hole 9 formed in a slit shape within a range of an angle of about 90 degrees. The hole 9 is
The rotating members 3 are arranged at regular intervals in the axial direction.

Four jet pipes 10 ... Are projectingly provided on the rotary member 3 at positions corresponding to the holes 9. The pipes 10 ... 9 are adjacent to each other in the axial direction of the rotary member 3.
They are arranged with a phase shift of 0 degree. This is to eject the air as continuously as possible. Same pipe 1
0 may be arranged such that the phases thereof are slightly shifted in the axial direction of the rotary member 3, or may be arranged without any phase shift.

In any case, the jet pipe 10 is brought into communication with the inside of the air distribution pipe 7 by correspondingly passing through the through hole 11 opened in the rotating member 3 and going around the hole 9, and this communication is established. The state continues while the communication hole 9 corresponds to the communication hole 11. Only during this period, air is introduced into the jet pipe 10.

The jet pipe 10 has a jet end 12 at its tip.
Although the ejection port 12 may be formed as it is at the tip end of the ejection pipe 10, in this embodiment, a porous piece 13 having a longitudinal flow direction is fitted inside the tip, As the air passes through the piece 13, it is atomized and ejected as shown in FIG. In addition, the same piece 13
One or more may be inserted in the middle of the ejection pipe 10. Further, for miniaturization, the magnets 14 may be inserted and supported in the jet pipe 10 in one or more stages.

Further, in this embodiment, the jetting pipe 10 is formed by projecting a pipe on the rotary member 3, but a plurality of strip-shaped projecting plates (swirl members) are arranged on the outer periphery of the rotary member 3, A jet pipe or a tube may be arranged along one or more lines. In addition, regardless of whether it is the splicing type as shown by the phantom line in FIG. 2 or the independent pipe type of the above-mentioned embodiment, it has a curved shape or a dogleg shape so as to reduce the rotational resistance and to easily eject. You may form.

This aerator is rotated in the direction shown in FIG. 2 by the motor 5, and the air is ejected from the blower 8 through the air distribution pipe 7 to the ejection pipes 10 ... In this embodiment, as shown by an arrow A in FIG. 2, the through hole 11 communicates with the communication hole 9 only during the range from the time when the tip of the ejection pipe 10 begins to sink into the water surface to the time when it exits from the water surface. Since the air is ejected, the air can be mixed with the circulating water 6 without waste.
A seal (an O-ring or the like) that prevents air from leaking is provided between the air circulation pipe 7 and the rotating member 3.
The number of the jet pipes 10 is four in the circumferential direction as shown in FIG. 2, but a larger number may be arranged. At the center of the air circulation pipe 7, a center shaft may be provided for smooth and effective air flow. Further, the rotating member 3 can be rotated in the direction opposite to that in FIG.

The embodiment shown in FIG. 3 can be constructed in all of the above-mentioned embodiment and the embodiments described later, and the number of the jet outlets 16 of the jet pipe 10 is large along the longitudinal direction of the pipe in the rear surface in the flow direction X. Along with the distribution of holes, the tip is also used as the ejection port 17. A large number of water introducing holes 18 are arranged on the front surface of the pipe 10 (the surface that contacts the circulating water 6). As a result, the circulating water 6 introduced from the water introduction holes 18 ... Is jetted through the jet outlets 16 and 17 by the force of the water. That is,
Instead of ejecting only air, it is ejected in a state where water and air are mixed in advance.

In the case of this embodiment, the air source and the air supply means may be omitted, and the air may be forcibly ejected by the force of water. In addition, the guide plate 19 is used in the sense that the reverse direction of water is prevented and the air flow is directed to the jet port
May be obliquely provided in the pipe. Furthermore, spout 1
It is not necessary to provide both holes 6 and 17, and only one of them may serve as the ejection port. The holes may be porous.

In the embodiment shown in FIGS. 4 and 5, a bearing (support member) 21 is arranged on the side wall 1 via a bracket 20, and the bearing 21 is arranged only on one side wall 1 and the other side. Although it is a normal bearing, the bearings on both the left and right sides may be of the type of the bearing 21 so as to have an air controllable structure to be described below. The bearing 21 is a combination of the main body and the left and right flanges, and has a circular rotation receiving hole 22 in the center of the main body.
Are formed.

The rotating member 23 has a partition plate 24 extending in three directions.
The inside is divided into three (or other number) chambers, which are air passages 29, and a plurality of holes 25 are formed in each column in the longitudinal direction so as to communicate with each chamber. Has been. Then, on the outer periphery of the rotary member 23,
The jet pipes 26 ... Are projected so as to communicate with the holes 25. On the other hand, at the end of the rotary member 23, as shown in FIG. 5, through holes 26 are formed at three circumferential positions, and vanes 27, ... A seal 28 is attached to the vane 27 to prevent air from leaking to other chambers.

The vanes 27 form three chambers in the circumferential direction. An introduction hole 30 is opened at the bottom of the bearing 21, and an air supply pipe 31 is connected to the hole 30 so as to communicate therewith. The air introduced from the air generation source through the air supply pipe 31 is constantly supplied from the introduction hole 30.
On the other hand, through the chamber 32 formed between the vane 27 and the next vane 27, from the corresponding through hole 26 to the air passage 29.
Air communicates inside. That is, the air is supplied through the lower passage 29 of the air passage 29, and the air is ejected only from the ejection pipe 33 communicating with the passage 29. As the rotating member 23 rotates, air is supplied to the air passage 29 that comes below, and the air is jetted through the jet pipe 33 corresponding to the air. In this way, since the air is jetted only in the lower fixed angle range of the jet pipe 33, the air is effectively used for mixing without waste.

The air passage 29 may be configured such that a plurality of pipes, one end of which communicates with the chamber 32, are inserted into the rotating member 23 to reach the ejection pipe 33. In this case, the ejection pipe 33 may be integrally extended by the plurality of pipes.

In the embodiment shown in FIG. 6, the protruding plate 35 is formed in a curved shape as described above, and the ejection pipe 36 is attached through the side surface thereof. Although it can be similarly applied to the other embodiments, the rotating member 37 is rotated in the direction C opposite to that shown in the drawing, and water is introduced into the pipe-shaped jet pipe 37 to rotate as shown by the imaginary line arrow B. Member 37
Air may be jetted through the downward jet pipe by the force of water.

In the embodiment shown in FIG. 7, the rotating member 40 is provided with a large number of scraping members 41, ... Which are rotated by the motor 42, and on the other side, the speed increasing gear is coaxially driven by the motor 42. A compressor (or blower) 44 is arranged via a box 43.
The air from is introduced separately below the surface of the oxidation ditch and jetted upward to mix. Reference numeral 45 denotes a jet pipe, which is evenly distributed through a plurality of divided pipes 46.
According to this embodiment, the motor 42 and the compressor 44
Are driven simultaneously, a drive source for driving the compressor becomes unnecessary. Note that air may be ejected through the stirring member 41.

In the embodiment shown in FIG. 8, the air motor 49 is driven by the compressor 48 to rotate the rotating member 50 via the speed reducer 50 and the scraping member 51 is driven to rotate. The compressed air generated by the compressor 48 is used as it is for mixing, and this embodiment can also simplify the drive source.

In the embodiment shown in FIG. 9, in which the compressor 53 drives the air motor 54 to rotate the rotary member 55 and the scraping member 56, the compressed air generated from the compressor 53 or the air motor 54 is oxidised. It is related to those that are used for foundation ditch and others. In this case, the compressed air is used to drive the cylinder that opens and closes the gate attached to the oxidation ditch, or to drive the hopper opening and closing cylinder. Also, rake 5 in circular sedimentation pond 57
It can also be used to drive a motor 60, which drives a center shaft 59 for rotating 8, and subsequently to eject air into the pond. The air from the air motor 54 may be used for the drive or the like as indicated by the imaginary line arrow. Further, it is used to drive the air motor 61 in the aerator 63 which is provided with the air motor 61 and rotationally drives the blades 62, and is also used to stir and mix the subsequent air into the water. The stirrer member 56 may be attached to the crank type rotating member 52 shown by an imaginary line.

In the embodiment shown in FIGS. 10 and 11, a plurality of (three, etc.) parallel rotary members 66 having axial directions in the flow direction are provided between the side walls 65 with the stirring member 67. , Is simultaneously driven by the motor 68, the chain 69 and the sprocket 70. Reference numeral 71 is a bearing member mounted between both side walls 65, and air is guided to the upstream region from a compressor 72 driven by a motor 68. The stirrer members 67 are formed in an intricate shape so that they can be effectively mixed, but they may be separated from each other. The rotating member 6
6 may be mounted obliquely like a virtual line.

In the embodiment shown in FIG. 12, the bearing member 74 is bridged between the side walls 75, and the motor 76 is attached to the bearing member 74.
And the compressor 77 are separated from each other, and the compressor 77 is driven by the motor 76 via the chain 78 and the sprocket 79. In particular, the rotating member 80 has a vertical axis, and the swirling member 81 has two horizontal axes. Although it is a rotary type, the number of rotating members 80 is not limited, and a plurality of rotating members may be provided in the flow direction. The air from the compressor 77 is ejected as shown by the arrow.

FIG. 13 shows an example in which a vertical axis type aerator 83 is arranged in an oxidation ditch. In this case, a guide cover 84 is provided on one front side of the aerator 83 so as to cover the aerator 83 approximately half as viewed from above. The rotation resistance is reduced. Same aerator 83
Are placed at any or all of the locations shown.

In the embodiment shown in FIG. 14, the horizontal shaft type aerator 86 is arranged in water, and since the aerator 86 is also the forced supply type as described above, it is possible to arrange it in water. is there. A guide cover 87 is also provided on the aerator 86.

In the embodiment shown in FIGS. 15 and 16, disks 90 are arranged in a row on the rotating member 89, and the radiation plate 9 is interposed therebetween.
1 is arranged so that air is ejected from the holes of the rotating member 89 through the radiation plates 91.

In the embodiment shown in FIG. 17, a plurality of ejection pipes 94 ... Are projected on the rotary member 93 to communicate with each other through a hole 95, and the valve 95 having the through hole 96a.
With regard to what is controlled to open and close. A lever 97 is connected to the valve 96 via a shaft, and a float 98 is attached to the tip of the lever 97. And float 9
8 is pulled by a spring 99.

The control is such that, when the jet pipe 94 rotates into the water, the float 98 swings counterclockwise against the spring 99 due to the buoyancy, the flow of water and the rotational speed, and the next jet It stops by hitting the pipe 94. As a result, the valve 96 also rotates and the through hole 96a communicates with the hole 95, so that air is ejected from the ejection pipe 94.

When the float 98 comes to the surface of water by rotating,
The float 98 is replaced by the spring 99 and the valve 96 is closed. As a result, air is jetted from the jet pipe 94 only when it is under water, and air mixing is possible without waste.
The float 98 is also for obtaining buoyancy, and if it can be operated only by resistance of rotation and water flow, the float 9
8 may be something other than a float. Further, the float 98 may be bowl-shaped in order to obtain large rotation resistance and water flow.

The embodiment shown in FIG. 18 is a jet pipe 101.
A cylindrical air piston 102 that reciprocates up and down in response to gravity is loaded therein.
A porous piece 103 for miniaturization is attached to the tip of the. In this embodiment, the air sucked inside is jetted when the jet pipe 101 comes downward, and the air is sucked inside when the jet pipe 101 comes upward. According to this embodiment, the air drive source is unnecessary.
The jet pipes 101 corresponding to the radial direction may be communicated with each other by a communication pipe. Also, the air piston 102
May have a ball shape that is easy to move, as shown in FIG.

[0041]

Since the present invention is the aerator as described above, water purification can be more positively and effectively performed.

[Brief description of drawings]

FIG. 1 is a front view of an aerator showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional view showing another embodiment.

FIG. 4 is a cross-sectional view of a main part showing another aerator.

5 is a sectional view taken along line VV of FIG.

FIG. 6 is a side sectional view showing another embodiment.

FIG. 7 is a front view showing another embodiment.

FIG. 8 is a front view showing another embodiment.

FIG. 9 is a schematic view showing another embodiment.

FIG. 10 is a plan view showing another embodiment.

11 is a plan view of FIG.

FIG. 12 is a schematic vertical cross-sectional view showing another aerator.

FIG. 13 is a plan view showing an arrangement example of a vertical axis type aerator.

FIG. 14 is a schematic diagram showing an example in which a horizontal axis type aerator is arranged in water.

FIG. 15 is a side view showing a disk type aerator.

16 is a front view of FIG.

FIG. 17 is a side sectional view showing another aerator.

FIG. 18 is a side sectional view showing another aerator.

FIG. 19 is a sectional view showing a ball-shaped piston.

[Explanation of symbols]

2, 21 ... Support member (bearing), 3, 23, 40, 55,
66, 80, 93 ... Rotating member, 5, 42, 49, 54,
60, 61, 68, 76 ... Rotational drive means (motor),
6 ... Water to be treated, 7 ... Air distribution pipe, 8, 44, 4
8, 53, 72, 77 ... Air generating means, 9 ... Communication hole,
10, 33, 36, 37, 45, 94, 101 ... Jet pipe, 11 ... Through hole, 12, 16 ... Jet outlet, 25 ... Hole, 2
6 ... through hole, 29 ... air passage, 30 ... introduction hole.

Claims (9)

[Claims] 1. An aerator installed in a treatment pond such as an oxidation ditch for positively supplying and mixing air into the water to be treated, comprising a rotating member and a driving means for rotating the rotating member. An air generating means, a means for flowing the air from the generating means along the inside and / or the outside of the rotating member, and a plurality of air protruding from the air generating means on the outer periphery of the rotating member. An aerator for an oxidation ditch or the like, characterized in that the aerator is provided with a jetting means having a jetting outlet for jetting the water into the water to be treated. 2. The jetting means according to claim 1, wherein the jetting means is adapted to come and go with the water surface as a boundary by rotation, and the air from the jetting means is blown out between the air generating means and the jetting means. An aerator for an oxidation ditch or the like, which is configured to control so as to eject only under a certain range below the water surface. 3. An aerator for an oxidation ditch according to claim 1 or 2, wherein water can be introduced into the jetting means and the introduced water can be jetted together with air from a jet port. 4. The rotating member according to claim 2, wherein air passage holes are arranged in the circumferential direction of the rotary member, and a jet pipe serving as a jet means is provided so as to communicate with the hole, and
In the rotating member, a non-rotating air circulation pipe is passed, and at a peripheral lower part of the circulation pipe, a communication hole communicating with the rotating through hole is provided for an oxidation ditch or the like. Aerator. 5. The rotating member according to claim 2, wherein the rotating member is rotatably supported by a fixed type supporting member, and air from the air generating means is downwardly provided in a hole for supporting the rotating member of the supporting member. While a hole to be introduced from the above is formed, an air passage hole is arranged in the circumferential direction of the rotating member, and a jet pipe as a jetting unit is provided so as to communicate with the hole and the same rotation is performed. An air passage that is divided in the circumferential direction and communicates with the jet pipe is formed on the inner periphery of the member, and the introduction hole of the support member is formed on the peripheral portion of the portion of the rotary member corresponding to the support member. An aerator for an oxidation ditch, etc. in which holes that communicate with each other by rotation are formed. 6. An aerator for an oxidation ditch or the like according to claim 1, wherein the drive means uses the power of the air generating means as a drive source. 7. The blower according to claim 2, wherein a hole for introducing air into the jetting pipe of the jetting means is openable / closable by a valve, and its control is provided outside the jetting pipe so as to be below the water surface by rotation of the pipe. An aerator for an oxidation ditch or the like, which is configured to interlock so as to open the hole when reaching the water surface and close the hole when reaching the water surface. 8. An aerator for an oxidation ditch or the like according to claim 2, wherein an air piston that vertically reciprocates according to gravity is provided in the ejection pipe of the ejection unit. 9. The aerator for an oxidation ditch according to claim 8, wherein the air piston has a ball shape.