JP3232400B2 - 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 apparatus, and more particularly to an aeration apparatus for efficiently a large amount of wastewater with a simple apparatus.

[0002]

2. Description of the Related Art Water quality in closed water areas such as aquaculture ponds, ponds, and other ponds provided in golf courses, lakes and marshes, or in open water areas of rivers and harbors, due to decay of substances flowing into the water areas. And the occurrence of blue-green algae and the like. For this reason, in order to purify the water quality, a stirrer is installed on the water surface of the water area such as a pond to stir the water surface and force the water and air into contact with each other to improve the dissolved oxygen, thereby improving the water quality. Is going. Conventionally, as a water stirring and aerator, generally, a screw is arranged on the water surface or in the water, and the screw is forcibly rotated and stirred by a power machine, and the atmosphere is supplied to the water and mixed. I have.

[0003]

The above-mentioned conventional screw-type aerator can agitate and aerate sewage on the water surface, but it is difficult to agitate and aerate the water at a deep part of the water, and it is difficult for the aeration to enter underwater or water. Since the drive unit has a mechanical drive unit, the drive unit is liable to be worn or broken by water or impurities contained in the water, and it is necessary to perform periodic inspection and maintenance. It is also known that when air taken into water is crushed to form air bubbles, the finer the air bubbles, the longer the residence time in water and the higher the oxygen dissolution efficiency inevitably. ing. However, in the method in which the bubbles are crushed into fine particles by rotating the screw, and the mixture is forcibly mixed and stirred with water, there is a problem that the fine bubbles are limited and a large power is required. Was. The present invention solves the above-mentioned problems of the conventional aeration apparatus, eliminates a mechanical drive unit in water, minimizes gas sucked into water as much as possible, and efficiently removes a large amount of wastewater. An object of the present invention is to provide an aerator capable of aeration.

[0004]

In order to achieve the above object, an aeration apparatus according to the present invention comprises a pressurized water tank 1 to which pressurized water is supplied, and a number of aeration nozzles projecting from a side surface of the pressurized water tank 1. In the aeration apparatus including the unit 2 and the air tank 9 for supplying air to each of the aeration nozzle units, the aeration nozzle unit 2 is provided on the side surface of the pressurized water tank 1 in the same direction, and has an annular concentric different diameter. Are characterized by being arranged.

[0005] In the aeration apparatus of the present invention having the above structure, a number of aeration nozzle units are arranged on the side surface of the pressurized water tank so as to protrude in the same direction. The mixed water flow with the mixed air bubbles accelerates the jet flow, and the mixed high-pressure water discharged into the water can be discharged into the water area even at a deep water depth and aerated, and the circulating water flow in a wide water area Promote the occurrence of
Aeration can be performed over the entire water area, and large-volume aeration can be performed by one unit. In addition, since a large number of aeration nozzle units are arranged concentrically and annularly in a ring, the jet from each aeration nozzle unit is rectified and injected, and a large-sized large-capacity aerator can be easily manufactured. In addition, it can be dealt with by changing the number of aeration nozzle units used according to the aeration capacity.

In this case, the aeration nozzle unit 2
Are arranged concentrically and differently in diameter, the one arranged on the outer periphery side is longer, the one on the inner periphery side is sequentially shortened, and the arrangement cross section of the aeration nozzle unit 2 is arranged in a parabolic or inverted conical shape. can do.

In the aeration apparatus of the present invention having the above-described structure, the water flows jetted from a number of aeration nozzle units are rectified discharge flows, and the discharge flows reach a distant place to perform a wide range of aeration.

In this case, the aeration nozzle units 2 are arranged concentrically and concentrically with different diameters, the one arranged on the outer peripheral side is shortened, and the one on the inner peripheral side is sequentially lengthened, so that the arrangement cross section is conical. Can be arranged.

In the aeration apparatus of the present invention having the above-described structure, the water flow injected from the aeration nozzle unit is diffused at a large angle to the surroundings, so that the water surface area is small and suitable for aeration of a deep water area. Become.

[0010] In this case, a number of aeration nozzle units 2 arranged in an annular concentric and different diameters can all be arranged with the same length.

In the aeration apparatus of the present invention having the above-described structure, since the tip nozzles of all the aeration nozzle units are on the same plane, the jetting is performed simultaneously from the same plane position. Thus, large-volume aeration is performed uniformly, and the jet water is diffused, so that wide-area aeration is performed.

In this case, a number of the aeration nozzle units 2 can be arranged in a ring concentric and different diameters, and can be arranged to be inclined at a certain angle with respect to the longitudinal axis of the aeration apparatus.

In the aeration apparatus of the present invention having the above-described structure, the water flow from the aeration nozzle unit becomes a swirling flow in accordance with the inclination angle of the aeration nozzle unit. Aeration can be performed uniformly.

Further, the aeration apparatus according to the present invention comprises a pressurized water tank 1 to which pressurized water is supplied, a number of aeration nozzle units 2 projecting from the side of the pressurized water tank 1, and an air supply to each of the aeration nozzle units. And an air tank 9 for supplying air.
Is characterized by arranging a large number in parallel with the side surface of the pressurized water tank 1.

In the aeration apparatus of the present invention having the above-described configuration, the aeration nozzle units are arranged in parallel in the same direction, so that uniform aeration suitable for a water area having a small water depth and a wide water surface can be performed.

In this case, a laminar flow tube 10 can be provided so as to cover the outer periphery of the aeration nozzle unit 2 in which a large number are protruded and arranged in parallel on the side surface of the pressurized water tank 1.

In the aeration apparatus of the present invention having the above-described structure, the jet water flow from the aeration nozzle unit is a discharge flow which is rectified so that the outer peripheral portion thereof is wrapped and protected by the laminar flow tube, and becomes a water flow. The discharge flow reaches far away and a wide range of aeration can be performed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the aeration apparatus of the present invention will be described below with reference to the drawings. Aeration device A of the present invention
Is installed horizontally or vertically upward in a closed water area such as a pond or lake, in an open water area such as a river or a harbor, or at a predetermined position in water such as a sewage storage tank.
As shown in detail in FIG. 1, a pressurized water supply pipe P1 is connected to a pressurized water tank 1 to which pressurized water is supplied. A pressurized water supply pipe P1 for supplying necessary pressurized water from a pump or a submersible pump (not shown) to the pressurized water tank 1 and a self-priming or pressurized air, oxygen, or other gas from the atmosphere. An intake pipe P2 is connected to the air tank so as to intake air to all the aeration nozzle units. In the embodiment shown in FIG. 1, a plurality of aeration nozzle units 2 are protruded from one side surface of the pressurized water tank 1. However, as shown in FIG. It can be protruded from any outer peripheral side such as four sides, and the direction in which the aeration nozzle units 2 are provided with respect to the pressurized water tank 1 and the number thereof are not limited to those shown.

The pressurized water tank 1 is desirably as large as possible to reduce the flow rate of pressurized water supplied from a pressurized water supply pipe P1 connected to one end and increase the pressure, as shown in FIG. When the aeration nozzle unit is provided only on one side of the pressurized water tank, a flange 11 bulging to the side may be attached to the pressurized water tank. A large number of aeration nozzle units 2 are protruded. In this case, the aeration nozzle units 2 are arranged in a concentric and different diameter type as shown in FIG. 3A or in a parallel type as shown in FIG. I do. In the case of concentric arrangement of different diameters, a center aeration nozzle unit 2A is provided at the center of the side surface of the pressurized water tank, and a plurality of aeration nozzle units 2B are provided on the outer periphery thereof at predetermined intervals in an annular shape. Similarly, a plurality of aeration nozzle units 2C and further 2D are arranged and arranged annularly at predetermined intervals in the same manner, and the center aeration nozzle unit 2A is arranged in another annular concentric and different diameter type aeration nozzle unit 2B.
The diameter may be larger than the diameter of 2C. Regardless of the concentrically different diameter type or the parallel type, the interval between the adjacent aeration nozzle units is determined so that the high-pressure water jets jetted from each aeration nozzle unit do not interfere with each other to reduce the jet flow.

When a plurality of aeration nozzle units are arranged in parallel, the tip surface of each aeration nozzle unit is shown in FIG.
(A), the center aeration nozzle unit 2A is the shortest, then the annular aeration nozzle unit 2B arranged on the outer periphery thereof is slightly longer than the center aeration nozzle unit 2A, and then the aeration nozzle unit 2C is longer. Whether the nozzle units 2D are arranged in a parabolic or conical shape so as to become longer toward the outer peripheral portion so as to be the longest, or are arranged at the same position in plan view as all having the same length as shown in FIG. , And the same figure (C)
As shown in (a), the aeration nozzle units 2D arranged at the outermost periphery of the annular arrangement, which are opposite to (A), are gradually shortened toward the inner peripheral side so as to become the shortest, and the center aeration nozzle unit 2A is made the longest. To do. By arranging the tip positions of the aeration nozzle units arranged concentrically and with different diameters as described above, the water flow injected from the aeration apparatus A can be converged (FIG. 4A) or diffused (FIGS. 4B and C).
And so on, depending on the application. FIG.
It is desirable that the converging type aeration apparatus shown in (A) and (B) is installed horizontally or almost horizontally in water, and the diffusion type shown in FIG. 4 (C) is installed horizontally or vertically upward at the bottom of the water. You can also. Further, the aeration nozzle units arranged concentrically and with different diameters all have their nozzle positions at the tip located on the same plane as shown in the respective drawings of FIG.
In each of the aeration nozzle units arranged on the annular concentric diameter, the tip nozzle positions thereof can be alternately changed to arrange them in a staggered manner as shown in FIG. This prevents the high-pressure water jets jetted from each aeration nozzle unit from interfering with each other to lower the jet water flow, and eliminates the dead zone of the jet water.

Further, the plurality of aeration nozzle units provided in the pressurized water tank are all arranged in parallel, but may be arranged in parallel with the longitudinal axis of the laminar flow tube 10 on the outer peripheral portion or with respect to the longitudinal axis of the laminar flow tube. It is also possible to twist and incline at a predetermined angle. When all the aeration nozzle units are twisted and arranged in this manner, the water flow discharged from the laminar flow tube is swirling, and the discharge jet can reach far.

The aeration nozzle unit 2 is shown in detail in FIG.
This aeration nozzle unit has a cylindrical first nozzle member 2.
1, the second nozzle member 22, and further the third nozzle member 2
3 are arranged on the same axis, and the nozzle members are connected and fixed to each other.
Like the other nozzle members, they are disposed on the same axis at the tip end of the nozzle member 23 to integrally connect the discharge pipes, and fine ring slit-shaped nozzles 6 and 7 are formed at the connection positions of the nozzle members. I do. The first nozzle member 21 is a cylindrical shape having a required inner diameter and length, and is formed in a pressurized water tank by engraving a male screw 24 on the outer periphery at the base end as shown in FIGS. The inner peripheral surface is formed in a trumpet shape or a funnel shape while being screwed into the mounting hole 12 and fixed with the fixing nut 8. Try to be guided smoothly.

First nozzle member 21, second nozzle member 2
2, the outer cylinder 3 is fitted so as to cover the outer peripheral portion of the joint position of the third nozzle member 23 as shown in FIG. 2, and the inner peripheral surface of the outer cylinder 3 and the outer peripheral surface of the joint portion of each nozzle member are A space is formed between the nozzles to form an air storage chamber 4, ring-slit nozzles 6 and 7 formed at the respective nozzle member joining positions from the air storage chamber, a first nozzle member 21, and a second nozzle member 22. The air can be supplied to the nozzle holes 5, 5 pierced. In addition, the nozzle hole 5 opened in the water passage inside the first nozzle member 21 and the second nozzle member 22 is as close to the ring slit nozzles 6 and 7 as possible and along one or the inner circumference. Two or more holes are perforated, and the ring-slit nozzle is formed such that the outlet-side outer peripheral shape of the first nozzle member 21 is a conical distal conical surface, and the ring-slit nozzle 6 is formed by the base end surface of the second nozzle member 22. Similarly, the outlet-side outer peripheral shape of the second nozzle member 22 is formed as a conical tip conical surface, and the ring-slit nozzle 7 is formed by the base end surface of the third nozzle member 32.

The air reservoir 4 of the outer cylinder 3 of each aeration nozzle unit is formed airtight, and each outer cylinder 3 is disposed so as to penetrate the air tank 9 in an airtight manner. Air holes 31 are formed in the outer cylinder in the tank so that air is supplied from the air tank into the outer cylinder. The air tank 9 is connected to an intake pipe P2 for self-priming from the atmosphere or for inhaling pressurized air, oxygen, or other gas from a tank, a blower, or the like. Further, when the air tank is disposed in a laminar flow tube, the air tank has a disk shape and a plurality of aeration nozzle units penetrate therethrough. The air holes 31 of the outer cylinder 3 provided in each of the aeration nozzle units are connected to the air tank, and the liquid flowing from the base end side of the laminar flow tube into the space between the aeration nozzle units passes through the air tank 9. In some cases, the water holes 9W are perforated so as to allow water to flow.

In the embodiment shown in FIGS. 1 and 4A, a laminar flow tube 10 is provided on the side surface of the pressurized water tank 1 so as to cover the outer peripheral portion of a number of aeration nozzle units 2 arranged in parallel. The laminar flow tube 10 has a base end fixed to a pressurized water tank, a tip end widened in a trumpet shape, and a water suction port 10H for sucking sewage or other liquid from a water area into the laminar flow tube at the base end outer peripheral portion. Perforate. In this case, a net may be provided to prevent dust from being mixed into water absorbed from the water area. By arranging the laminar flow tube 10, the jet water discharged from the aeration device is rectified and injected into the water area, so that the oxygen dissolved rate by the fine bubbles can be further improved.

As shown in FIG. 7, a sub-laminar flow tube 100 is fitted into the front end of the laminar flow tube 10 so as to have a predetermined gap around the front end of the laminar flow tube. The laminar flow tube 10 is installed to extend the length of the laminar flow tube 10 and further rectifies the jet water discharged through the sub-laminar flow tube 100. Further, by arranging a rectifying element, for example, the honeycomb 102 in the sub-laminar flow tube, the rectifying effect may be further improved.

The operation of the aeration apparatus according to the first embodiment of the present invention constructed as described above will be described below. The aeration apparatus A is installed at a predetermined water level such as a pond for aeration, the open end of the air supply pipe P2 connected to the air tank is above the water surface, and the pressurized water supply pipe P1 connected to the aeration apparatus is connected to a pump or a submersible pump. When the pump is connected and the pump is operated, pressurized water is supplied into the pressurized water tank 1 from the pressurized water supply pipe P1. In this pressurized water tank, a number of aeration nozzle units are provided so as to protrude from one side or a plurality of side surfaces of the pressurized water tank.
A, 2B, 2C, and 2D are supplied simultaneously.

When pressurized water flows from the pressurized water tank 1 through the water passage of the first nozzle member 21 of each aeration nozzle unit, the second stage nozzle joined to the first nozzle member 21 by the negative pressure generated in the water passage. The air is sucked from the first nozzle 6 having a ring slit shape formed between the second nozzle member 22 and the nozzle hole 5 and mixed with the water flow in the water passage. Air is sucked from the second nozzle 7 in the form of a ring slit formed between the step nozzle member 32 and the nozzle hole 5 and is mixed with the water flow in the water passage, and the air bubbles are crushed and fined and mixed with the water flow. It has been flowing down. This intake is performed from each nozzle from the air tank 9 through the air reservoir.

In this way, a water stream mixed with fine bubbles from all the aeration nozzle units is jetted. If a laminar flow tube is arranged on the outer peripheral portion of the aeration nozzle unit, the entire laminar flow tube will be inside the laminar flow tube. The jet water flow from the aeration nozzle unit is 1
It is rectified and discharged. If a sub-laminar flow tube is further connected to the laminar flow tube, even if the laminar flow tube discharged from the laminar flow tube is thick, the flow is rectified by the honeycomb and discharged as a rectified water flow.

Further, when the tip nozzles of all the aeration nozzle units are arranged as shown in FIG. 4 (A), the jet water flow from all the aeration nozzle units is converged into one water flow. It is suitable for aerating so as to reach the jet flow. In the case of disposing as shown in FIG. 7B, the jet water flow from all the aeration nozzle units is diffused to the surroundings, so that it is suitable for aerating the entire water area. Further, the arrangement as shown in FIG. 7C is more suitable for the case where the jet water flow is diffused than the embodiment shown in FIG.

The bubble size in the aeration apparatus of the present invention is expressed by the following formula for calculating the average bubble diameter: d. d = K × M / V × 1 / L 式 (Equation 1) where M: aeration gas (air) amount V: liquid (water) flow rate at gas-liquid contact portion L: length of gas-liquid contact portion K : Constant determined by surface tension, viscosity and specific gravity of gas and liquid From the above (Equation 1), to decrease average bubble diameter: d (1) Aeration air amount M (volume) is injection water amount Mw (volume) To an appropriate amount. (Do not put in excess air) 0.05 <M / Mw <0.5 In the case of fresh water (BOD and COD are small), M / M
In the case of a liquid having a large BOD and COD (eg, human waste treatment), the value of w is set to be small. (2) Increasing the flow velocity of the liquid (water) (increase the pump head) reduces the bubble diameter. (3) The bubble diameter is reduced by increasing the length of the gas-liquid contact portion. In the basic design concept of an aeration apparatus (especially a large apparatus), reducing the bubble diameter leads to higher efficiency and higher performance. Therefore, it is desirable to adopt a structure taking the above results into consideration.

[0032]

In the aeration apparatus according to the first aspect of the present invention, since a number of aeration nozzle units are arranged on the side surface of the pressurized water tank so as to protrude in the same direction, jetting is performed from each aeration nozzle unit. The water flow in which the micronized bubbles are mixed is merged to increase the speed of the jet water flow, and the mixed high-pressure water discharged into the water can be discharged into the water even at a deep water depth and can be aerated, and in a wide water region. This has the advantage that the generation of a circulating water flow is promoted, and aeration over the entire water area becomes possible, so that a large volume of aeration can be performed by one unit. In addition, since a large number of aeration nozzle units are arranged concentrically and in different diameters in a ring, the jet from each aeration nozzle unit is rectified and injected, and a large-sized large-capacity aerator can be easily manufactured. In addition, there is an advantage that can be dealt with by changing the number of aeration nozzle units used according to the aeration capacity.

In the aeration apparatus according to the second aspect, since the water flows jetted from a number of the aeration nozzle units are rectified discharge flows, the discharge flows reach a long distance and a wide range of aeration can be performed.

According to the third aspect of the present invention, since the water flow jetted from the aeration nozzle unit is diffused at a large angle to the surroundings, the water surface area is small and the water in the deep water area can be efficiently aerated. Become.

In the aeration apparatus according to the fourth aspect, since the tip nozzles of all the aeration nozzle units are on the same plane, the jetting is performed simultaneously from the same plane position, so that one large-diameter jet water is formed. Aeration is performed uniformly, and the jet water is diffused, so that a wide area of aeration is performed.

In the aeration apparatus according to the fifth aspect, since the water flow from the aeration nozzle unit becomes a swirling flow in accordance with the inclination angle of the aeration nozzle unit, the discharge water flow reaches far and uniform aeration over a wide area. Can be done.

In the aeration apparatus according to the sixth aspect, since the aeration nozzle units are arranged in parallel in the same direction, uniform aeration suitable for a water area having a small water depth and a wide water surface can be performed.

[0038] In the aeration apparatus according to the seventh aspect, the jet water flow from the aeration nozzle unit is discharged into the water area as a rectified discharge flow in which the outer peripheral portion is wrapped and protected by the laminar flow tube. Therefore, the discharge flow reaches a distant place and a wide range of aeration can be performed.

[Brief description of the drawings]

FIG. 1 is a partially broken front view showing a first embodiment of the aeration apparatus of the present invention.

FIG. 2 is an enlarged vertical sectional front view of an aeration nozzle unit used in the present invention.

FIG. 3 is a sectional view taken along line XX in FIG. 1;

FIG. 4 is an explanatory diagram of an example of arrangement of aeration nozzle units in the aeration apparatus of the present invention.

FIG. 5 is an explanatory diagram of an example of the arrangement of the nozzle tip of the aeration nozzle unit.

FIG. 6 is an explanatory view of a different arrangement example of the aeration nozzle unit in the aeration apparatus of the present invention.

FIG. 7 is a partially broken front view showing a second embodiment of the aeration apparatus of the present invention.

[Explanation of symbols]

 Reference Signs List A aeration device P1 pressurized water supply pipe P2 suction pipe 1 pressurized water tank 2 aeration nozzle unit 2A center aeration nozzle unit 2B concentric inner circumference annular arrangement aeration nozzle unit 2C concentric outer circumference annular arrangement aeration nozzle unit 21 first nozzle member 22 second Nozzle member 23 Third nozzle member 24 Male screw 3 Outer cylinder 31 Air hole 4 Air reservoir 5 Nozzle hole 6 First-stage ring slit-shaped nozzle 7 Second-stage ring slit-shaped nozzle 8 Nut 9 Air tank 10 Laminar flow Pipe 10H Water inlet 100 Sublaminar flow pipe 101 Stay

Claims (7)

(57) [Claims] A pressurized water tank (1) to which pressurized water is supplied.
And a plurality of aeration nozzle units (2) protrudingly arranged on the side surface of the pressurized water tank (1) and an air tank (9) for supplying air to each of the aeration nozzle units. The aeration nozzle unit (2)
An aeration apparatus characterized in that it is provided on a side surface of a pressurized water tank (1) in the same direction, and is arranged concentrically and concentrically with different diameters. 2. A plurality of aeration nozzle units (2) arranged annularly concentrically and diametrically, and those arranged on the outer peripheral side are long,
Aeration nozzle unit (2) by sequentially shortening the inner peripheral side
2. The aeration device according to claim 1, wherein the array cross-section is arranged in a parabolic or inverted conical shape. 3. A plurality of aeration nozzle units (2) are arranged concentrically and differently in diameter, and those arranged on the outer peripheral side are shortened.
2. The aeration apparatus according to claim 1, wherein the arrangement cross-sectional shape is arranged in a conical shape by sequentially increasing the inner peripheral side. 4. The aeration apparatus according to claim 1, wherein a plurality of aeration nozzle units (2) are arranged concentrically and unequally in diameter, and all are arranged to have the same length. 5. The aeration nozzle unit (2) is arranged in a large number in a ring concentric and diametrical manner, and is arranged so as to be inclined at a certain angle with respect to the longitudinal axis of the aeration apparatus. The aeration apparatus according to 1, 2, 3, or 4. 6. A pressurized water tank (1) to which pressurized water is supplied.
And a plurality of aeration nozzle units (2) protrudingly arranged on the side surface of the pressurized water tank (1) and an air tank (9) for supplying air to each of the aeration nozzle units. The aeration nozzle unit (2)
An aeration apparatus characterized in that a large number are arranged so as to protrude in parallel on the side surface of a pressurized water tank (1). 7. A laminar flow tube is provided so as to cover the outer periphery of an aeration nozzle unit (2) arranged in parallel with a plurality of side surfaces protruding from a side surface of a pressurized water tank (1).
The aeration apparatus according to 2, 3, 4, 5, or 6.