JPH09273499A - Deep water intake method and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently take in deep water with ease. SOLUTION: A well type pit 1 is arranged, and a water intake pipe 2 is arranged so as to communicate the bottom part to the water intake objective depth. By means of an air feeding means 3, compressed air is blown into the bottom part in the pit 1 so as to raise a water level in the pit 1, and water overflows to an overflow gutter 5 so as to be taken in. Subsequently, the water is fed to utility equipment via a water feeding pipe 6, and deep water is sucked into the pit 1 via the water intake pipe 2.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method and apparatus for extracting deep water from an ocean or lake.

[0002]

2. Description of the Related Art Sea water and lake water at a depth of several tens of meters or more, that is, deep water, has the characteristic that the water temperature is stable at a low temperature as compared with surface water. There is a plan to take the water and utilize it in the fish farm.

[0003]

By the way, in order to take in deep water, it is usual to lay an intake pipe up to the target depth of intake, pump up the deep water through the intake pipe and pump it to the facility. It is a technique. However, when the water intake depth is large, the pump requires a large head, so even if it is carried out on a laboratory scale, if it takes in a large amount of seawater on an industrial scale, the pump is extremely large and has a large capacity. Inevitably, it requires a great deal of equipment and operating costs.

In view of the above circumstances, it is an object of the present invention to provide an effective means for efficiently and simply taking deep water.

[0005]

According to the water intake method of the present invention, a well-shaped pit is provided, and an intake pipe is laid so as to communicate between the bottom of the pit and the water intake depth. It is characterized in that the compressed water is blown into the bottom of the pit to raise the water level in the pit so that the water overflows from the upper part of the pit to take in water, and deep water is sucked into the pit through the water intake pipe.

The water intake device of the present invention includes a pit formed in a well shape, and an intake pipe laid so that the base end opens at the bottom of the pit and the tip opens at the water intake depth. It is characterized by comprising an air feeding means for feeding compressed air to the bottom of the pit, an overflow gutter provided around the upper part of the pit, and a water pipe connected to the overflow gutter.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. FIG. 1 shows a schematic configuration of a water intake device according to the present invention, which is a well-shaped pit 1 for taking in deep water by applying the principle of an air lift pump from a depth of several tens of meters. In addition, the intake pipe 2 is laid between the bottom of the pit 1 and the target water intake depth, and the air supply means 3 is attached to the pit 1.

The size and shape of the pit 1 are arbitrary, but the depth thereof is, for example, about 30 meters, the inside thereof is partitioned by the partition wall 4 as necessary, and the overflow gutter 5 is provided around the upper part. The overflow gutter 5 is connected to a water pipe 6 for sending the deep water that has been taken in to a fish farm by a desired facility.

The water intake pipe 2 has a base end that opens to the bottom of the pit 1 and a tip that opens to the water intake target depth. Are always connected. Although only one intake pipe 2 is shown in FIG. 1, a plurality of intake pipes 2 having a desired diameter may be laid in parallel if necessary.

The air feeding means 3 is an air compressor 7
And an air blow pipe 8 installed at the bottom of the pit 1.
And an air supply pipe 9 connecting them, and a large amount of compressed air having a desired pressure, for example, about 6 atm can be ejected from the bottom of the pit 1.

Although reference numeral 10 in FIG. 1 is a roof installed so as to cover the entire water intake device, and 11 is a retaining wall for revetment, these installations are optional.

In the water intake device having the above structure, the compressed air is sent from the air compressor 7 to the bottom of the pit 1 so that the compressed air is ejected from the air blow pipe 8, whereby the pit 1
The bubbles 12 rise violently from the bottom of the inside, so that an ascending water flow occurs in the pit 1 and water and bubbles 12
When and are mixed, the specific gravity of the water in the pit 1 is apparently small. Therefore, the deep water is sucked in from the intake pipe 2 and flows in, and the water level in the pit 1 rises above the static level. Thus, the water in the pit 1 overflows into the overflow gutter 5 and is used by being sent from the overflow gutter 5 to the fish farm, for example, by the water pipe 6.

As described above, according to the water intake device having the above-mentioned structure, since the deep water is taken in by the principle of the air lift pump, it is only necessary to provide the power compressor with the air compressor 7 having a relatively small capacity, and therefore the deep water is taken. The required power is drastically reduced as compared with the conventional case where the pump is pumped by an ordinary pump, and the operating cost including the facility cost and the maintenance cost can be sufficiently reduced.

When the deep water is used in a fish farm, if the oxygen concentration of the deep water is not sufficient, it is considered to increase the oxygen concentration by performing aeration treatment after water intake. An aeration action naturally occurs at the time of water intake, so that the oxygen concentration is increased at the same time as the water intake, so that no special aeration treatment is required, and it is particularly suitable for use in a fish farm.

[0015]

As described above, since the present invention takes in deep water by the principle of the air lift pump, it does not require a large-capacity pump as in the case of pumping up with a normal pump, Therefore, the facility cost and the operating cost required for water intake can be significantly reduced, and thus it becomes possible to carry out a large amount of deep water intake or water intake from a large depth on an industrial scale. Further, since aeration action naturally occurs during water intake to increase oxygen concentration, it is particularly suitable for use in a fish farm.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a water intake device according to the present invention.

[Explanation of symbols]

 1 Pit 2 Water intake pipe 3 Air supply means 5 Overflow gutter 6 Water supply pipe 7 Air compressor 8 Air blow pipe 9 Air supply pipe

Claims (2)

[Claims] 1. A well-shaped pit is provided, and an intake pipe is laid so as to communicate between the bottom of the pit and the depth of water intake, and compressed air is blown into the bottom of the pit. A deep water intake method, characterized in that the water level in the pit is raised so as to overflow from the upper part of the pit for water intake, and the deep water is sucked into the pit through the water intake pipe. 2. A well-shaped pit, an intake pipe laid so that the base end opens at the bottom of the pit and the tip opens at the water intake target depth, and the bottom of the pit. An intake device for deep water, comprising: an air supply means for sending compressed air to the above, an overflow gutter provided around the upper part of the pit, and a water supply pipe connected to the overflow gutter.