JPH05277484A - Purification device of water stored in depth - Google Patents

Abstract

PURPOSE:To ensure that water stored in a deep layer can be purified using a small power by sending in water stored in a surface layer of almost the same specific gravity as water stored in the deep layer to be mixed with the latter so that the water stored in the deep layer is dispersed and convected. CONSTITUTION:An aerophilic water stored in a surface layer Wa is sent in to be mixed with an aerophobic water stored in a deep layer WA so that the water WA becomes dispersed, and can be purified by convection effects due to this dispersion. The subject purification device consists of a water flow generator 2 which is arranged in the water stored in the surface layer Wa and functions to send the water Wa downward, a flexible pipe 3 which is connected to the discharge aperture of the water flow generator 2, extending to an area near a pond bottom A in the deep layer, and a diffuser 4 connected to the extension end part of the flexible pipe 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purification device for deep-layer stored water used for purifying stored water having a deep water depth.

[0002]

2. Description of the Related Art In dams, lakes and marine areas, the surface layer of stored water becomes a relatively high temperature aerobic water layer due to contact with solar heat and air, while the deep layer has low temperature anaerobic due to sun block and lack of oxygen. Since it becomes a water layer, there is an inconvenience that gas is generated and the deep-layer stored water is decomposed.

Therefore, as a means for purifying the deep-layer reservoir water, for example, an air supply pipe extended from the land portion is connected to a cylindrical body standing at the bottom of the pond or the like, and compressed air is intermittently supplied from the compressor on the land portion. When ejected into the inside of the tubular body, convection is generated in the vertical direction by the ejected air, and due to this convection action, a purifying device is used so that the deep-layer stored water is mixed with the surface-layer stored water and purification proceeds. Was there.

[0004]

However, while the above-mentioned conventional purifying apparatus has an advantage that the deep layer stored water is supplemented with oxygen by compressed air, the air having an extremely low specific gravity is removed from the head of the deep layer stored water. Since it is also necessary to compress to a large pressure, the scale of the compressor becomes large, the required horsepower also increases, and the equipment cost and operating cost increase.

Therefore, there is a problem that this tendency becomes remarkable in dams and sea areas where the water depth is extremely deep.

In view of such conventional circumstances, the present invention sends the aerobic surface layer stored water having the same specific gravity to the anaerobic deep layer stored water to diffuse and convection action by this diffusion. Accordingly, it is an object of the present invention to provide a deep-layer stored water purification device capable of purifying deep-layer stored water with a small amount of power.

[0007]

A purifying device for deep-layer stored water according to the present invention sends aerobic surface-layer stored water to anaerobic deep-layer stored water to diffuse it, and the convection action by this diffusion is performed. A purifying device for purifying deep layer stored water, which is arranged in the surface layer stored water, and which is used for sending the surface layer stored water downward and to a discharge port of the water stream generator. It comprises a flexible tube connected to and extended to the vicinity of the bottom of the deep layer and a diffuser connected to the extended end of the flexible tube.

[0008]

After the water flow generator is activated, the surface layer stored water is sucked into the water flow generator and then sprayed widely from the diffuser into the deep layer stored water through the flexible tube.

The convection in the vertical direction is generated by the surface layer stored water ejected from the diffuser in a wide range, and the dissolved oxygen in the surface layer stored water is transferred to the deep layer stored water by this convection action, whereby the deep layer stored water is discharged. Purification proceeds.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The purifying apparatus 1 shown in FIG. 1 converts the deep layer stored water W _A in a dam, lake or marine area into the surface layer stored water W _B.
The water flow generator 2, the flexible tube 3, and the diffuser 4 are intended to be purified by contact with the water flow generator 2.

Reference numeral 51 denotes a pedestal, which is provided so as to project above the water surface from a base portion buried in the ground of the surface layer pond bottom B, and the water flow generation is performed on the upper surface of a floor board 52 provided in the middle portion thereof. Machine 2 is fixed.

Reference numeral 53 is a revetment constructed around the surface layer stored water W _B , and a jetty 54 is installed between the upper portion of the revetment 53 and the upper portion of the mount 51.

Reference numeral 55 denotes a power receiving room, and a power feeding cable 56 is laid from the power receiving room 55 through the jetty 54 to the water flow generator 2.

A flow station 57 is moored to the land portion via a plurality of mooring ropes (not shown) so as to be located above the diffuser 4.

A weight 58 fixes the diffuser 4 at a desired submerged position, and is connected to the diffuser 4 via a chain 59.

As shown in FIG. 2, the water flow generator 2 is, for example, a vertical submersible pump, and a low head, large capacity axial flow pump 6 is connected below the submersible motor 5.

In the submersible motor 5, the power supply cable 56 is connected to the terminal 7 at the upper end, and the impeller 9 of the axial pump 6 is attached to the output shaft 8 at the lower end.

The axial flow pump 6 has a funnel-shaped suction port 11 surrounding the lower end of the submersible motor 5 on the upper side of a pump casing 10 for accommodating the impeller 9, and a discharge port 12 on the lower side. There is. Reference numeral 13 is a hanger, and 14 is a hose port for connecting the upper end of the flexible tube 3.

The flexible tube 3 includes a water flow generator 2 and a diffuser 4.
A flow path for the surface layer stored water W _B is formed between them and the upper end thereof is fitted into the hose port 14 and is tightened and fixed by an appropriate fixing tool such as a hose band (not shown). The extended end (lower end) is located near the deep layer pond bottom A.

The material of the flexible tube 3 may be any of woven cloth, rubber, synthetic resin and metal material as long as it can be adapted to the irregular shape of the bottom of the pond.

The diffuser 4 diffuses the surface layer stored water W _B sent from the flexible tube 3 in the deep layer stored water W _A to generate vertical convection action. As shown in FIG. 4, it comprises a tubular water receiving portion 4a that can be fitted and fixed to the extended end portion of the flexible tube 3 and a diffusion portion 4b having a Y-shaped cross section and a circular planar shape. A plurality of (for example, six) guide blades 4c are provided inside the.

Reference numeral 15 is a float, and a hollow body having a rectangular cross section is formed in a donut shape, and the diffusing portion 4b balances the weight 58 and maintains a normal posture (see FIG. 4).
It is attached to the middle part (vertical pipe part) of b.

In the flow station 57, a submersible pump (not shown) having a nozzle 57b can be moved up and down by a well-known float 57a according to the water level fluctuation, and a power supply cable (not shown) is connected to the power receiving chamber 55. It is wired.

Next, the operation of the above embodiment will be described.

When the water flow generator 2 is started, the aerobic and high temperature surface layer stored water W _B passes through the flexible tube 3 from the diffusion portion 4b of the diffuser 4 and is anaerobic and low temperature deep layer stored water W _B. Widely erupts diagonally upward in _A.

At this time, since there is no significant difference between the specific gravity of the surface layer stored water W _{B and} the specific gravity of the deep layer stored water W _A , the surface layer stored water W _B mixes with the deep layer stored water W _A. Sent in. Therefore, the water flow generator 2 can send water with the performance of a low head in consideration of only the pipe loss, so that a small power is sufficient.

Surface layer stored water W ejected from the diffuser 4
_B causes vertical convection due to its jetting action and an ascending action due to the temperature difference between the deep layer stored water W _A, and the dissolved oxygen in the surface layer stored water W _B is generated by this convection action.
_By moving to _A for purification, blisters and dissolved oxygen content of all stored water are averaged.

In this way, when performing the purification treatment with the surface layer stored water W _B , if necessary, the flow station 57
Aeration purification by is added.

In this embodiment, the diffuser 4 has the water receiving portion 4a and the diffusing portion 4b formed in an L shape, but a diffuser 21 shown in FIG. 5 may be applied instead.

This diffuser 21 includes a water receiving portion 21a and a diffusion portion 2
1b is formed in a T shape, and a float 22 is attached to an intermediate portion of the diffusion portion 21b. The diffusion portion 21b is provided with a plurality of guide vanes 21c, and a plurality of fountains are provided on the upper surface of the water receiving portion 21a. The hole 21d is opened.

As another embodiment, the upright purification device 31 shown in FIG. 6 can be applied.

That is, the purifying device 31 is the float 3
5, a water flow generator 32 held so as to be able to move up and down, and a discharge port 32a of the water flow generator 32 are connected to connect to a deep layer bottom A
It comprises a flexible tube 33 extending in a vertical straight tube shape toward and a diffuser 34 connected to an extended end portion of the flexible tube 33.

As shown in FIG. 7, the diffuser 34 has a tubular water receiving portion 34a that can be fitted and fixed to the extended end portion of the flexible tube 33, and an inverted Y-shaped section and a circular planar shape. Diffusion unit 34
b, and a plurality of (for example, 6) guide blades 34c are provided inside the diffusion portion 34b.

The float 35 has the same structure and operation as the above-described embodiment except that the float 35 is moored to the land mooring pile 61 via a plurality of mooring ropes 60 in FIG.

Further, as the water flow generators 2 and 32, a mixed flow pump may be applied instead of the axial flow pump.

[0037]

The purifying apparatus for deep-layer stored water according to the present invention is
A water flow generator is placed in the surface layer stored water, and a diffuser is connected to the extended end extending from the outlet of this water flow generator to the vicinity of the deep layer pond. It is designed to be purified by convection due to the feed rate of the partial reservoir water and the temperature difference between the two, and the water flow generator uses a surface layer reservoir water to a deep layer part whose specific gravity is almost the same as this surface layer reservoir water. Since the performance of pumping into the stored water is sufficient, by applying a low head, large capacity submersible pump, it is possible to purify the deep part stored water with less power compared to the conventional technology.

Therefore, there is an excellent advantage that the facility cost and the operating cost are significantly reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a dam or the like in which a purifying device for surface layer stored water is arranged.

FIG. 2 is a front view showing the water flow generator in a partial cross section.

FIG. 3 is a plan view showing the diffuser in a partial cross section.

FIG. 4 is a vertical sectional view of a diffuser.

FIG. 5 is a front view showing another embodiment of the diffuser in a partial cross section.

FIG. 6 is a vertical cross-sectional view of a dam or the like in which a purifying device according to another embodiment is arranged.

7 is an enlarged vertical sectional view showing the diffuser of FIG.

[Explanation of symbols]

1,31 Purification device 2,32 Water flow generator 3,33 Flexible tube 4,21,34 Diffuser W _A Deep part reservoir water W _B Surface part reservoir water A Deep part pond bottom

Claims (1)

[Claims] 1. A purifying device adapted to send aerobic surface layer stored water to anaerobic deep layer stored water to diffuse the aerobic surface layer stored water, and to purify the deep layer stored water by convection action due to the diffusion. A water flow generator that is placed in the surface layer stored water and that sends the surface layer stored water downward, and a flexible pipe that is connected to the discharge port of the water flow generator and extends to the vicinity of the deep layer pond bottom. And a diffuser connected to the extended end of the flexible tube, a purifying device for deep-layer stored water.