JPS6127615Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for replenishing dissolved oxygen in water at a dam or the like by sending compressed air into the water using an air compressor.

For example, in a water intake source such as a dam that is used for multiple purposes to secure agricultural water, drinking water, etc., as shown in Figure 1, due to various conditions, the intake port 1a of the water intake channel 1 is The system is equipped to take water into the water supply channel 2 by utilizing the positional difference between the water supply port 1b and the water supply port 1b, that is, the potential energy, but in recent years, eutrophication of such water intake sources has become a problem.

That is, organic matter flowing into the water intake source is decomposed by aerobic bacteria when the amount of dissolved acid in the water is sufficient. However, as mentioned above, if water is taken only near the surface of the water, the water does not flow and stagnates in the deep layer near the bottom, making it difficult to replenish oxygen. Due to lack of dissolved oxygen, aerobic bacteria cannot decompose organic matter, resulting in eutrophication, which is extremely inconvenient as a water source.

Therefore, at water intake sources such as dams, it is necessary to appropriately pump air into the water to replenish dissolved oxygen in order to prevent eutrophication.

Conventionally, a water intake source is provided with a water dissolved oxygen replenishment device 3 as shown in FIG. 1 to supply dissolved oxygen to the water intake source.

That is, in the conventional replenishment device 3, an air compressor 4 is driven by a prime mover 5 such as an electric motor or an engine, and a compressed air pipe 7 is connected from the air compressor 4 to an aeration device 6 located near the bottom of the water. and cause air to flow out into the water from this aeration device 6 in the form of bubbles,
It is designed to replenish dissolved oxygen in the water.

However, since the prime mover 5 is used as a driving source for the air compressor 4, the so-called running cost is high, and this is extremely inconvenient in recent years when energy saving is required.

In view of the above-mentioned circumstances, this invention proposes the use of flowing water energy in an intake channel for taking water from a water intake source as a means to drive an air compressor, and reduces running costs by replenishing dissolved oxygen in water. The object of the present invention is to provide a device for replenishing dissolved oxygen in water, which is devised so as to be able to perform the operation while reducing oxygen consumption and saving energy.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIG.

In the figure, 11 is the water intake source, which is the side wall 1 of the dam.
2, the intake channel led to the water supply channel 13,
The water intake port 11a of this intake channel 11 faces the area near the water surface of the dam, and the water supply port 11b is located far below the water intake port 11a, and the water intake port 11a and the water supply port 11b are connected to each other. Water is taken from the dam to the water supply channel 13 by utilizing the positional difference, that is, potential energy.

Reference numeral 14 indicates a replenishment device for dissolved oxygen in water according to the present invention. Connect waterway 15,
An appropriate water turbine device 16 is interposed at an appropriate position in the water supply channel 15, and the device 16 is supported on the water channel 13. Furthermore, an air compressor 17 is supported adjacent to the water turbine device 16. rotating shaft and air compressor 1
The compressed air pipe 19 is connected to the drive shaft of the dam 7 in an interlocking manner, and a compressed air pipe 19 is guided from the air compressor 17 to an aeration device 18 disposed in a deep part of the dam.

Therefore, due to potential energy, the intake channel 11
A part of the water flowing from the water intake port 11a to the water supply port 11b flows from the headrace 15 to the water supply channel 13 through the water turbine device 16, but at this time, the water wheel of the water turbine device 16 and its rotation axis Since the rotary shaft is rotated, the air compressor 17 is driven by a drive shaft connected to the rotary shaft.
Note that a flow control valve 20 for adjusting the rotational speed of the water turbine to the driving speed of the air compressor 17 is interposed at a portion of the water conduit 15 on the upstream side of the water turbine device 16 . Further, the water turbine device 16 is selected to be of an appropriate type according to the water flow conditions of the water headrace 15.
The pump device can also be used in reverse. That is, the suction port and discharge port of the pump are connected to the water conduit 15, and the pump shaft is connected to the air compressor 1.
Connected to the drive shaft of 7.

Then, when the air compressor 17 is driven by the water turbine device 16, compressed air is sent from the compressed air pipe 19 to the aeration device 18, and the air is bubbled from the aeration device 18, similar to the conventional one. The dissolved oxygen in the deep layer of the dam is replenished. Although the aeration device 18 is well known and its details will be omitted, it is equipped with a float (not shown) and a flotation prevention chain 2 at a predetermined position in the deep part of the dam.
1, and depending on the conditions of the water source that requires replenishment of dissolved oxygen, it may not necessarily be necessary, and even if air is sent directly into the water from the compressed air pipe 19, it will not meet the intended purpose. Sometimes it is possible to achieve.

As described above, the underwater dissolved oxygen replenishment device of the present invention utilizes a water turbine device operated by the energy of flowing water in the intake channel and therefore the headrace channel as the drive source for the air compressor, and therefore, it is not as described at the beginning. Compared to conventional devices, running costs can be reduced and energy savings can be achieved.

Furthermore, according to the replenishment device of the present invention, even if a water source is not equipped with an intake channel required as a driving source for an air compressor, if there is a water intake source equipped with an intake channel such as a dam nearby. It is possible to replenish dissolved oxygen in the water by driving an air compressor while maintaining the above-mentioned advantages using the air passage, making it possible to use the air compressor for extremely versatile purposes.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a conventional underwater dissolved oxygen replenishment device, and FIG. 2 is a side view showing an underwater dissolved oxygen replenishment device according to the present invention. 11...Intake channel, 11a...Water intake, 11b...
... Water supply port, 14 ... Replenishment device for dissolved oxygen in water, 1
5... Headrace, 16... Water turbine device, 17... Air compressor.

Claims (1)

[Scope of utility model registration request] It is a replenishment device for dissolved oxygen in water, which is formed by guiding a compressed air pipe from an air compressor to below the water surface. 1. An apparatus for replenishing oxygen dissolved in water, characterized in that a conduit in which a water turbine device is installed is connected at a suitable location, and the water turbine device is configured as a driving source for the air compressor.