JP2001047088A - Water quality improving apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus capable of cleaning the bottom of water to improve water quality without generating environmental pollution. SOLUTION: In a water quality improving apparatus wherein an impeller 1 constituted of a plurality of blades 1-1 is connected to the drive device 2 fixed to a float 4 by a shaft and the impeller 1 is rotated to clean water, a partition wall 6 is provided around the impeller 1 and an outer partition wall 5 is provided outside the partition wall 6. Since the partition wall 6 is provided around the impeller 1, ascending streams can be generated from the bottom of water under that impeller. Descending streams are generated between the partition wall and the outer partition wall by providing the outer partition wall 5 outside the partition wall 6 to improve the circulation of water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for improving a part of water quality in a wide water area such as an inlet or a lake, and more particularly to an apparatus for improving the water quality of a middle water area or a water bottom part to reduce the condition of the water bottom (eg, sludge). It relates to an apparatus for reforming.

[0002]

2. Description of the Related Art In a wide body of water such as an inlet or a lake (hereinafter simply referred to as "water body"), organic matter deposited on the bottom of water is corroded and decomposed by aerobic bacteria, and microorganisms, plants and animals are used as food or nutrients. Has been cultivated. However, the bottom of a special water area, for example, the bottom of a lake or marsh where contact between the upper and lower layers is less likely to occur, and the bottom of a fish farm are easily susceptible to oxygen deficiency. Furthermore, when environmental pollution from a river or the like is added and oxygen is depleted, organic substances on the water bottom are corroded and decomposed by anaerobic bacteria. When oxygen is further depleted, the organic matter is deposited on the bottom of the water in the form of sludge. In this condition, small animals or plants at the bottom of the water are limited in their habitat and in extreme cases die.

[0003] In a seafood cultivation site and a seaweed cultivation site widely used in inland seas and estuaries, unused feed and debris removal residues accumulate on the seabed, and a thick layer is formed in a state of lack of oxygen. May have formed. In this case, unexpected illness occurs in the cultured product or the cultivated product, a large amount of harmful microorganisms are generated, the growth of the cultured product or the cultivated product is reduced, and the commercial value is reduced.

[0004] As a countermeasure, there is a method of removing accumulated sludge or supplying a large amount of fresh air (oxygen) to utilize aerobic bacteria.

[0005] A method of supplying a large amount of fresh air includes:
There are a method of blowing air into water, a method of circulating water, and a method of bringing fine water droplets into contact with air.

The method of blowing air into water includes, for example, a bubbling method used for breeding fish in a water tank, and an aeration method using an activated sludge method used for treating wastewater and wastewater.

[0007] Aeration is a typical example of air utilization, in which a large amount of air is sent to bacteria contained in sludge to activate the bacteria and organic substances in wastewater are decomposed by the bacteria. Utilizing this principle,
There is a case in which an attempt was made to increase the oxygen concentration on the sea floor by laying a high-pressure air pipe with a nozzle on the sea floor and generating air bubbles. However, according to the results of the experiment, sludge on the sea floor was blown up, causing environmental pollution due to the diffusion of sludge and the high cost of generating high-pressure air.

The method of bringing water into contact with air is generally employed in aquaculture farms. However, this method increases the oxygen concentration on the water surface, but does not sufficiently improve the environment at the water bottom. In addition, since the sewage is scattered as water droplets, it may cause environmental pollution.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus capable of purifying water areas and improving water quality without causing environmental pollution.

[0010]

Means for Solving the Problems The present inventor manufactured a device for improving the water quality by rotating the impeller near the water surface to stir the water, and as a result of conducting various experiments, as a result, a partition around the impeller was obtained. The present inventors have found that the provision of the wall can improve the water quality improvement effect from the water surface to the water bottom, and completed the present invention.

The gist of the present invention resides in the following water reformer shown in FIG.

An impeller 1 composed of a plurality of blades 1-1 is connected to a drive unit 2 fixed to a float 4 by a shaft (reference numeral shown in FIG. 2).
3) a water reforming device that is connected by 3) to purify water by rotating the impeller 1, and a partition wall 6 is provided around the impeller 1 from a water surface to a middle water layer or a water bottom, and further necessary. A water reforming device, wherein an outer partition wall 5 is provided according to the above.

The above-mentioned partition wall 6 is configured such that its upper surface is higher than the water surface or the water surface. Further, it is desirable to provide the outer partition wall 5 outside the partition wall 6 so that the upper surface thereof is higher than the upper surface of the partition wall 6. The partition wall 6 and the outer partition wall 5 are supported by an arm 4-1 extending from the float 4.

By providing the partition wall 6 around the impeller 1, the impeller 1 functions as a pump and generates an upward flow in the partition wall 6. Further, by providing the outer partition wall 5, a water channel is formed between the partition wall 6 and the outer partition wall 5, and a downward flow is generated. The water at the bottom of the water is pumped up by the ascending flow, and the water at the surface of the water is forcibly moved to the bottom by the downward flow.

[0015]

FIG. 1 is a perspective view showing the appearance of a water reforming apparatus (an example having an outer partition wall 5) of the present invention.

The water reforming apparatus W of the present invention comprises an impeller 1 mainly composed of a plurality of blades 1-1 (four in the figure), a driving device 2, a float 4, a partition wall 6, and an outer partition wall 5. It is composed of

FIG. 2 is a view showing a cross section of the water reforming apparatus of the present invention. FIG. 2 (a) is a partial cross-sectional plan view seen from above, and FIG. 2 (b) is a longitudinal cross-sectional view including a central axis.

The impeller 1 is configured such that a plurality of blades 1-1 are radially implanted at equal intervals on an outer peripheral surface of a cylindrical hub 1-2. The structure of the blade 1-1 is such that water under the blade 1-1 in the drawing has a negative pressure, that is, water is pumped upward from below. The hub 1-2 is connected to the driving device 2 by a shaft 3.

The size of the impeller varies depending on the conditions of the water area or the required degree of purification, but the length of the blade is preferably 0.5 to 5 m.

When the impeller 1 of the water reformer rotates in water, the water is pushed upward by the blade 1-1 and flows radially in all directions. Since the water on the lower side of the impeller 1 is decompressed, an upward flow is generated inside the partition wall 6 from the water bottom toward the water surface. As a result, the water at the bottom moves to the surface of the water and comes into contact with the air to supply oxygen, thereby improving the water quality.

The rotation speed of the impeller is low (1 to 60 rpm)
Then, the water is pushed up to the upper side of the impeller by the rotation of the blade,
It suffices if there is an ability to generate decompression below the impeller. Due to this decompression, water rises from the bottom to the water surface, and an upflow is generated. The ascending flow changes its direction on the water surface, and becomes a radial water flow moving radially in the water surface in the horizontal direction. Water is brought into contact with the atmosphere and oxygen is absorbed by the radiation water flow and the stirring effect of the blades. However, in this state, the oxygen-enriched water diffuses to the surface and moves little below the water surface. Therefore, in the present invention, it is desirable to provide an outer partition wall 5 described later.

The driving device 2 is fixed to the float 4 by a support arm 2-1. Although an electric motor is used as the driving device 2, a water wheel that rotates with pressurized water or a device that rotates with air pressure may be used. The power source is conduit 2-
Inside 2 is supplied from a source by cable. Also,
The generated power can also be used in a solar cell mounted on the float and the partition wall or on a separate floating body.

Float 4 drives impeller 1 in water
2 has a structure that can obtain buoyancy enough to be supported in the atmosphere. In the float 4, the driving device 2 is provided with a support arm 2-
Fixed by one. Float 4 has a partition wall
A support arm 4-1 for supporting 6 is attached via a bracket 4-2, and the other end of the arm 4-1 has an upper wall of an outer partition wall 5.
5-1 is attached via a bracket 5-3. The support arm 4-1 is provided with a turnbuckle 4-3 for adjusting the length. The upper wall 5-1 of the outer partition wall is formed of a hollow structure or a material having a lower specific gravity than water.

The partition wall 6 includes an arm 4 provided on the float.
-1 or a support arm 5-4 provided on the outer partition wall 5 is provided around or below the impeller 1, and guides the upward flow generated by the impeller from the water bottom to the water surface.
Further, it functions to prevent the upward flow by the impeller and the downward flow generated at the outer partition wall 5 from colliding with each other. For this purpose, the inner dimension of the partition wall 6 is made substantially equal to the outer diameter of the impeller. Further, the length of the partition wall 6 varies depending on the depth of the water area, but it is desirable to increase the length to the vicinity of the bottom in order to generate an upward flow from the water bottom. The shape of the partition wall 6 is cylindrical in the figure, but may be polygonal. In addition, a metal plate is used as a material, and in a water area where the flow in the horizontal direction is large, the lower wall is deformed by the water flow, so that a cloth, a net, a porous material, or the like can be used.

The outer partition wall 5 includes an upper wall 5-1 which is located on the water surface and blocks the radial water flow to form a downward flow, and a lower wall 5-2 which guides the downward flow to the middle water layer or the bottom. It is desirable to construct from the following.

The upper wall 5-1 is preferably formed in a cylindrical or polygonal shape in order to block the radial water flow caused by the impeller, and its upper part is preferably higher than the water surface. For this reason, the upper wall body 5-1 has a structure capable of obtaining buoyancy, for example, styrene foam or the like can be used. When the upper wall body 5-1 is formed of a metal plate, it is desirable that the inside is hollow. Further, even a metal plate may be solid if a float is provided on the side surface of the partition wall. The inner dimension thereof is larger than the outer diameter of the partition wall 6, and is not more than three times the outer diameter formed by the rotation of the blade 1-1. The length of the upper wall 5-1 is not particularly limited, but may be any length that can provide buoyancy.

It is desirable that the upper surface of the upper wall body 5-1 is equal to or higher than the water surface position in still water. The notch 5-5 provided in the upper part of the upper wall body 5-1 is for letting a part of the upward flow flow out of the partition wall and diffuse it. In addition, the effect of the wave can be eliminated by providing the notch.

The lower wall 5-2 is attached to a lower portion of the upper wall, and guides a descending water flow to a middle water layer or a water bottom. For this purpose, it is preferable to use a metal plate having the same shape as the upper wall body. However, in a water area where the flow in the horizontal direction is large, the lower wall body is deformed by being pushed by the water flow, so that it is preferable to use a cloth, a net, a porous material, or the like.

FIG. 3 is a diagram showing a partial vertical cross section of a water reforming apparatus in which an impeller is provided inside an inner partition wall. This water reforming apparatus is provided with a partition wall 6 extending from the water surface to the vicinity of the water bottom around the impeller 1, and an outer partition wall outside the partition wall 6.
5 is a device in which the upper surface is provided at a position higher than the upper surface of the partition wall 6.

In a water area having a high surface temperature, such as in summer, a temperature difference occurs in the vertical direction, and the water temperature on the water surface is higher than the water temperature on the water bottom. For this reason, the specific gravity of the water on the water surface is lighter than that on the water bottom, and strong buoyancy acts, so that the downward flow is prevented only by stirring the water surface. In order to solve this, in the present invention, it is desirable to provide a shielding plate for restricting the water flow at a part between the partition wall and the inner partition wall, and provide a region for concentrating the downward flow.

FIG. 4 is a partially sectional perspective view showing an embodiment in which a shielding plate 7 is provided between a partition wall and an outer partition wall. In this figure, description of an impeller and the like is omitted to show the structure of the shielding plate.

The shielding plate 7 is provided with an inclined plate 7-that is inclined to both sides across a support arm 5-4 connecting the partition wall 6 and the outer partition wall 5.
1, 7-2 and vertical plates 8-1, 8-2 which are vertically mounted from the lower sides of the inclined plates 7-1, 7-2. As shown by the arrow, the water flow rises as a rising flow on the partition wall and changes from a horizontal flow to a descending flow. However, the water flow is blocked by the inclined plates 7-2 and 7-3 and descends the descending flow area 9. Since the cross-sectional area of the descending flow is limited by the descending flow area 9, even water having a low specific gravity is pushed down to the bottom of the water.

[0033]

According to the water reforming apparatus of the present invention, since the partition wall is provided around the impeller, an upward flow from the water bottom can be generated inside the partition wall. Further, if an outer partition wall is provided outside the partition wall, a downward flow can be generated during this period to force the water to circulate. Thus, if this device is provided, the water quality of the middle water layer or the bottom of the water area is improved, and sludge on the bottom of the water is also reduced. If a downflow is used, various additives can be introduced into a predetermined water area. For example, the following are mentioned.

(A) feeding an oxidizing agent, a coagulant, a chemical, etc. to sludge or sedimentary organic matter at the bottom of the water; (b) feeding small animals or aquaculture organisms in water; and (c) fertilizer for underwater plants. Spraying.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an external appearance of a water reforming apparatus of the present invention.

FIG. 2 is a diagram showing a cross section of the water reforming apparatus of the present invention,
(a) is a partial sectional plan view seen from above, and (b) is a longitudinal sectional view.

FIG. 3 is a longitudinal sectional view showing a cross section of a water reforming apparatus according to another embodiment of the present invention.

FIG. 4 is a partially sectional perspective view showing an embodiment in which a shielding plate is provided between a partition wall and an inner partition wall.

[Explanation of symbols]

 1. Impeller 2. Drive device 3. Axis 4. Float 5. Outer partition wall 6. Partition wall 7. 7. Shield plate Vertical plate 9. Descending basin

Claims (2)

[Claims] 1. A water reforming device for purifying water by rotating an impeller of an impeller composed of a plurality of blades and connecting a drive device fixed to a float with a shaft, the impeller comprising: A water reforming device characterized in that a partition wall extending from the water surface to near the middle water layer or the bottom of the water is provided around the periphery. 2. A water reforming device for purifying water by rotating an impeller comprising a plurality of impellers connected by a shaft to a drive device fixed to a float, the impeller comprising: A water reforming device, comprising: a partition wall extending from the water surface to the middle water layer or the vicinity of the water bottom, and an outer partition wall provided outside the partition wall.