JPH0910754A - Lake water quality maintenance equipment - Google Patents

Abstract

PURPOSE: To provide lake water quality maintenance equipment capable of being arranged in a lake without performing civil engineering construction on the land or in water, capable of being scaled up, capable of discharging contaminated water to the downstream area of the lake by utilizing existing equipment without damaging a scene and dispensing with the power for raising and lowering a movable intermediate partition wall. CONSTITUTION: A float chamber 4 is provided to the upper part of a water tank and a water inflow and outflow port 3 is provided to the side wall part thereof and the bottom part of the water tank is opened and a movable intermediate partition wall 2 is provided to the water tank in a liftable manner and the upper part of the water tank is floated above the surface of a lake by the buoyancy of the float chamber while the lower part thereof is submerged in water and contaminated water flows in the water tank above the movable intermediate partition wall 2 from the water inflow port 3. Lake water is present under the movable intermediate partition wall and, when the storage amt. of water in the water tank is increased, the movable intermediate partition wall falls and, when the storage amt. of water is reduced, the movable intermediate partition wall rises and only a slight water level difference is generated between the water level in the water tank and the water level of the lake and the upper part of the water tank is always floated from the surface of the lake by definite quantity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lake water quality conservation facility applicable to dam lakes, natural lakes and the like.

[0002]

2. Description of the Related Art In dam lakes, natural lakes, etc., the water quality has deteriorated due to the development of the surrounding areas, which has become a major social problem.
The main cause of this deterioration in water quality is eutrophication of inflow water that flows into dam lakes, natural lakes, etc.
When it is made to flow in, it diffuses and settles, and the treatment is not easy.

Therefore, the following is considered as a water quality conservation measure in the lake. (1) Purify contaminated water that flows into the lake and discharge it into the lake or downstream of the lake. (2) Purify contaminated water in the lake. (3) Purify the water discharged to the downstream side of the lake. (4) Inflow water to the lake is discharged to the downstream side of the lake by bypass.

[0004]

In order to take the water quality conservation measures (1) to (3) above, a large-scale purification facility (septic tank) is required in or around the lake, but , There is not enough site to install a large-scale purification facility. Also on the surface of the lake, it is difficult to install large-scale purification equipment because the water level fluctuates sharply. In addition, in order to take the water quality conservation measures of (4), it is necessary to constantly discharge a certain amount of the inflow water into the lake to the downstream side of the lake.

The present invention is proposed in view of the above-mentioned problems, and the object of the present invention is to install it in a lake without carrying out civil engineering work on land or in water, to make it large-scale, and to not damage the landscape. , The contaminated water, etc. can be discharged to the downstream side of the lake by using the existing equipment, and the point is to provide the water quality conservation equipment in the lake that does not require the power for raising and lowering the movable intermediate bulkhead.

[0006]

In order to achieve the above object, the lake water quality conservation equipment of the present invention has a water storage tank having a floating structure that can float on the lake surface, and purifies the water stored in the water storage tank. It is constructed so that it can be treated or discharged to the downstream side of the lake (Claim 1). In the lake water quality conservation equipment according to claim 1, a float chamber is formed in an upper part of the water storage tank, a water outflow inlet is provided in a side wall portion below the lake surface of the water storage tank, and a bottom portion of the water storage tank is opened. A movable intermediate partition wall that moves up and down according to an increase or decrease in the amount of stored water may be provided in the water storage tank below the water outflow inlet (claim 2).

In the lake water quality conservation facility according to the first and second aspects, the water outlet of the water storage tank may be connected to the maintenance discharge facility on the downstream side of the lake through the existing water intake facility (claim 3). The lake water quality conservation facility according to claim 1 or 2, wherein the water storage tank comprises a water storage tank having a contaminated water storage function, a water storage tank having a contaminated water purification function, and a water storage tank having a purified water storage function. The respective water storage tanks may be connected in that order via a water outflow / outlet port (claim 4).

[0008]

The lake water quality conservation facility according to claim 1 has a water storage tank having a floating structure that can float on the surface of the lake, and the water stored in the water storage tank can be purified or discharged to the downstream side of the lake. , Water quality conservation equipment in the lake will be installed in the lake without performing civil engineering works on land or in water. In the lake water quality conservation facility according to claim 2, a float chamber is formed in an upper part of the water storage tank, and a water outflow inlet is provided in a side wall portion below the lake surface of the water storage tank.
The bottom of the water storage tank is opened, and a movable intermediate bulkhead is installed in the water storage tank below the water outflow inlet so that it can be moved up and down.The buoyancy of the float chamber causes the upper part of the water storage tank to float above the lake surface and The lower part (most of the water storage tank except the upper part) is submerged, and contaminated water etc. is stored above the movable intermediate bulkhead (the movable intermediate bulkhead in which the specific gravity of the wall itself matches the specific gravity of water) from the water inlet. It flows into the tank. At this time, there is lake water below the movable intermediate bulkhead, and when the amount of water stored in the water storage tank increases, the movable intermediate bulkhead descends, and when the amount of water stored in the water storage tank decreases, the movable intermediate bulkhead is removed. It rises and there is no slight water level difference between the water level in the reservoir and the water level on the lake surface.
The upper part of the water storage tank always floats above the lake surface.

In the lake water quality conservation facility according to claim 3, the water outlet of the water storage tank is connected to the maintenance discharge facility on the downstream side of the lake through the existing water intake facility, and clear water or contaminated water is stored from the water inlet. The water flows into the tank, is stored, and is then discharged from the water outlet of the water storage tank to the downstream side of the lake through the existing water intake equipment and the maintenance discharge equipment on the downstream side of the lake, thus preserving the water quality in the lake.

According to a fourth aspect of the present invention, there is provided a water storage facility in a lake, wherein the water storage tank comprises a water storage tank having a contaminated water storage function, a water storage tank having a contaminated water purification function, and a water storage tank having a purified water storage function. Then, the respective water storage tanks are connected in that order via a water outflow / outlet port, and first, contaminated water etc. flows into a water storage tank having a contaminated water storage function, is stored, and then to a water storage tank having a contaminated water purification function. It flows in and is purified, then flows into a water storage tank having a purified water storage function, is stored, and is then discharged into the lake.

[0011]

【Example】

(First Embodiment) Next, a lake water quality conservation facility of the present invention is shown in FIG.
Referring to the first embodiment shown in FIG. 2, reference numeral 5 is a water storage tank, and the water storage tank 5 includes a tank outer wall 1 having an open bottom.
And a movable intermediate partition wall that is vertically movable within the tank outer wall 1 (a movable intermediate partition wall in which the specific gravity of the wall itself matches the specific gravity of water)
2, a water outlet / inlet 3 provided in the tank outer wall 1 above the movable intermediate partition 2, and a float chamber 4 formed in the upper part of the tank outer wall 1. 9 is a water storage tank 5
Reservoir 10 therein is lake water (dam water) below the movable intermediate bulkhead 2.

Next, the operation of the lake water quality conservation facility shown in FIGS. 1 and 2 will be specifically described. A float chamber 4 is formed above the water storage tank 5, a water outflow inlet 3 is provided in a side wall portion of the water storage tank 5 below the lake surface, a bottom portion of the water storage tank 5 is opened, and the water storage tank 5 is located below the water outflow inlet 3. The movable intermediate bulkhead 2 is provided in the water storage tank 5 so as to be able to move up and down, and the buoyancy of the float chamber 4 causes the upper portion of the water storage tank 5 to float above the lake surface and the lower portion of the water storage tank 5 (excluding the upper portion of the water storage tank 5). Most of the portion) is submerged in water, and contaminated water or the like flows from the water inlet 3 into the water storage tank 5 above the movable intermediate partition wall (the movable intermediate partition wall whose specific gravity matches the specific gravity of water) 2.

At this time, below the movable intermediate partition wall 2,
When there is lake water (dam water) and the amount of water stored in the water storage tank 5 increases, the movable intermediate bulkhead 2 descends, and when the amount of water stored in the water storage tank 5 decreases, the movable intermediate bulkhead 2 rises to store water. There is no slight water level difference between the water level in the tank 5 and the water level on the lake surface, which causes the upper part of the water storage tank 5 to always float above the lake surface by a certain amount.

(Second Embodiment) Next, a lake water quality conservation facility of the present invention will be described with reference to a second embodiment shown in FIG. 3. Reference numeral 5 is a water storage tank, and the water storage tank 5 is the water storage tank of the first embodiment. It is configured similarly to the tank 5. 6 is upstream water, 7 is existing water intake equipment, 8 is maintenance and discharge equipment on the downstream side of the lake, and 16 is a guide member for guiding the water storage tank 5.

Next, the operation of the lake water quality conservation facility shown in FIG. 3 will be specifically described. Upstream water (clear water or contaminated water) 6 flows from the water inlet 3 into the water storage tank 5 and is stored therein, and then from the water outlet 3 of the water storage tank 5 to the existing water intake facility 7 and the maintenance discharge facility 8 on the downstream side of the lake. After being discharged to the downstream side of the lake, the water quality in the lake is preserved. (Third Embodiment) Next, a lake water quality conservation facility of the present invention will be described with reference to a third embodiment shown in FIG. 4. 5a is a water storage tank having a contaminated water storage function, and the water storage tank 5a is the first embodiment. It is configured similarly to the water storage tank 5 of the example.

Reference numeral 5b is a water storage tank having a function of purifying contaminated water, and the water storage tank 5b is constructed similarly to the water storage tank 5 of the first embodiment. The water storage tank 5b has a function of chemically, biologically, and physically purifying contaminated water.
Reference numeral 5c is a water storage tank having a purified water storage function, and the water storage tank 5c is configured similarly to the water storage tank 5 of the first embodiment.

A water storage tank 5a having a contaminated water storage function, a water storage tank 5b having a contaminated water purification function, and a water storage tank 5c having a purified water storage function are connected in that order through a water outflow port. 14 is an anchor, 15
Is a connection between the water storage tanks 5a and 5b and the water storage tank 5b,
It is a valve / pump facility provided at the connection between 5c.

Next, the operation of the lake water quality conservation facility shown in FIG. 4 will be specifically described. First, contaminated water or the like flows into a water storage tank 5a having a contaminated water storage function and is stored therein.
Next, it flows into a water storage tank 5b having a contaminated water purification function, is purified there, then flows into a water storage tank 5c having a purified water storage function, is stored therein, and is then discharged into the lake.

[0019]

EFFECTS OF THE INVENTION The lake water quality conservation equipment of the present invention has a water storage tank having a floating structure that can float on the surface of the lake as described above, and the water stored in the water storage tank can be purified or discharged to the downstream side of the lake. As a result, the lake water quality conservation facility can be installed in the lake without performing civil engineering work on land or in water.

Further, a float chamber is formed in the upper part of the water storage tank, a water outflow inlet is provided in a side wall portion below the lake surface of the water storage tank, the bottom of the water storage tank is opened, and the water storage tank is below the water outflow inlet. A movable intermediate bulkhead is provided so that it can be raised and lowered, and the upper part of the water storage tank is floated above the lake surface by the buoyancy of the float chamber and the lower part of the water storage tank (most part of the water storage tank except the upper part) is submerged. Contaminated water or the like is caused to flow from the water inlet into the water storage tank above the movable intermediate bulkhead (the movable intermediate bulkhead in which the specific gravity of the wall itself matches the specific gravity of water). At this time, there is lake water below the movable intermediate bulkhead, and when the amount of water stored in the water storage tank increases, the movable intermediate bulkhead descends, and when the amount of water stored in the water storage tank decreases, the movable intermediate bulkhead is removed. It rises and causes only a slight water level difference between the water level in the water tank and the water level on the lake surface, which keeps the upper part of the water tank constant with respect to the water level on the lake surface even if the water volume changes. Since the water tanks are held at the height position, the water tanks can be easily joined to each other, and the lake water quality conservation facility can be enlarged.

Further, as described above, since the upper part of the water storage tank is held at a constant height position with respect to the water level on the lake surface, the landscape is not impaired. Also, since the water outlet of the water storage tank is connected to the maintenance discharge facility on the downstream side of the lake through the existing water intake facility,
Clear water or contaminated water can be discharged to the downstream side of the lake using existing equipment.

Further, the water storage tank is composed of a water storage tank having a contaminated water storage function, a water storage tank having a contaminated water purification function, and a water storage tank having a purified water storage function. First, the contaminated water etc. flows into a water storage tank having a contaminated water storage function, stores the water therein, and then flows into a water storage tank having a contaminated water purification function, where it is purified. Then, it flows into a water storage tank having a purified water storage function, stores the water in it, and then discharges it into the lake. From this point as well, the lake water quality conservation facility can be enlarged.

When the amount of water stored in the water storage tank increases,
When the movable intermediate bulkhead is lowered and the amount of water stored in the water storage tank is reduced, the movable intermediate bulkhead is raised, so that power for raising and lowering the movable intermediate bulkhead can be eliminated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of a first embodiment of a lake water quality conservation facility of the present invention.

FIG. 2A is a partially cut perspective view showing details of the first embodiment, and FIG. 2B is a longitudinal side view thereof.

FIG. 3 is a vertical sectional side view showing a second embodiment of the lake water quality conservation facility of the present invention.

FIG. 4 is a vertical sectional side view showing a third embodiment of the lake water quality conservation facility of the present invention.

[Explanation of symbols]

 1 Tank outer wall of water storage tank 2 Movable intermediate bulkhead of 3 〃 Water outflow inlet of 3 〃 Float chamber of 5 〃 Water storage tank 9 Water storage in water storage tank 10 Lake water (dam water) below movable intermediate bulkhead 2

Claims (4)

[Claims] 1. A water quality preservation facility in a lake, comprising a water storage tank having a floating structure that can float on the surface of the lake, and configured so that the water stored in the water storage tank can be purified and discharged to the downstream side of the lake. 2. A float chamber is formed in an upper portion of the water storage tank, a water outflow inlet is provided in a side wall portion of the water storage tank below the lake surface, a bottom portion of the water storage tank is opened, and the water is placed below the water outflow inlet. The lake water quality maintenance facility according to claim 1, wherein a movable intermediate partition wall that moves up and down according to an increase or decrease in the amount of stored water is provided in the water storage tank. 3. The lake water quality conservation facility according to claim 1, wherein the water outlet of the water storage tank is connected to a maintenance discharge facility on the downstream side of the lake through an existing water intake facility. 4. The water storage tank comprises a water storage tank having a contaminated water storage function, a water storage tank having a contaminated water purification function, and a water storage tank having a purified water storage function. 3. The lake water quality conservation equipment according to claim 1, wherein the equipment is connected in that order via a doorway.