JPH03238096A - Device for supplying oxygen to deep layer water - Google Patents

Abstract

PURPOSE:To obtain an energy-conserving type oxygen supply device by providing a first pipe reaching a water deep layer, a second short pipe, a head tank for maintaining a common water level above these pipes, a floating body for supporting the head tank and a diffuser. CONSTITUTION:When jet of water is delivered by a blower 6 into a second pipe 2 from a diffuser 5, the water near surface layer is made to flow into the second pipe 2 from its lower open end 7 due to air lift effect, sent up therethrough, reaches a head tank 3 above and, from there, the water enters a first pipe 1 from its upper end 8 and flows out from the lower end 8 thereof into a deep layer water. The oxygen in the bubbles of the air being delivered from the diffuser 5 is dissolved in the surrounding water in the course of its rising through the first pipe 1 and, since the water contg. the dissolved oxygen of a high concn. runs through the deep layer water, the quality of water in the deep layer can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for supplying oxygen to deep water in lakes, dams, regulating ponds, etc.

[Prior Art] As one measure to improve water quality in lakes, dams, regulating ponds, etc., an oxygen supply device as shown in FIG. 3 has conventionally been used. In this conventional device, a long cylindrical body 12 whose upper end is closed is attached to a floating body 11, and a pump 13 is inserted from the top of this cylindrical body 12.
The water is pumped up by a blower 14 on the discharge side, and air is blown into the water by a blower 14.

Therefore, the water containing dissolved oxygen is discharged from the lower end of the cylindrical body 12 to the deep layer, so that the quality of the deep water can be improved.

[Problems to be Solved by the Invention] As described above, with the conventional device, air can be sent to deep layers, so the utilization rate of oxygen is high, but since a forced downward flow must be created by the pump, the pump power is The problem was that it was getting bigger.

The present invention has been made to solve such problems, and an object of the present invention is to provide an energy-saving oxygen supply device by utilizing the well-known deep shaft principle.

[Means for Solving the Problems] In order to achieve the above object, the oxygen supply device for deep water according to the present invention includes a first pipe that reaches the deep part of the water, and an upper end opening that is connected to the first pipe. a second pipe located on the outside or inside of the upper part of the pipe, the lower end opening of which is located outside of the first pipe, and which is much shorter than the first pipe; This system includes a head tank that maintains a common water level above the pipes, a floating body that supports the head tank, and an air diffuser inserted inside the second pipe.

[Function] In the present invention, since the second pipe is surrounded by water, the second pipe is shortened so that water flows in from the opening at its lower end.

The surrounding water rises inside the second pipe due to the air lift effect of air blown from the air diffuser inserted inside the second pipe. This rising water is combined with the water in the first pipe in the head tank, creating a downward flow relative to the water in the first pipe while maintaining a common water level. At the same time, the oxygen in the blown bubbles dissolves into this downward flow, so that water with a high dissolved oxygen concentration can be sent into the deep layer from the lower end of the first pipe. In this way, the surrounding water is the first
pipe, the head tank, and a second pipe. A modified version of such a conventional deep shaft is supported underwater by a floating body, and oxygen is supplied to deep water.

In addition, since the downward flow velocity in the first pipe may be small enough to generate a circulation flow, the blower may be a low-pressure blower.

[Example 1] FIG. 1 is a schematic diagram of an oxygen supply apparatus according to the present invention. In the figure, 1 is a first pipe, which is long enough to reach the deep part of the water. A second pipe 2 is provided at the upper part of the first pipe 1 so as to surround it, and is formed shorter than the first pipe 1, and may have a length of about 5 m.

3 is a head tank connected to the upper part of the second pipe 2;
1st ° Keep common water above the second pipes 1 and 2. Then, a floating body 4 is attached to the head tank to support this device underwater. 5 is an air diffuser inserted into the second pipe 2, and is connected to a blower 3) 6 installed on the floating body 4.

In the oxygen supply device configured as described above, air is blown into the second pipe 2 by the blower 6 from the diffuser 5. Then, due to the effect of the air lift, water near the surface layer begins to flow in from the lower end opening 7 of the second pipe 2, and this water rises inside the second pipe 2 and enters the upper head tank 3.
When reaching the upper end 8 of the first pipe 1, the first pipe 1
A circulating flow as shown by the arrow in the figure is generated, which flows into the water and flows out from the lower end 9 into deep water. And air diffuser 5
The oxygen in the bubbles blown into the surrounding water dissolves in the process of rising inside the first pipe 1, becoming water with a high dissolved oxygen concentration and flowing into deep water, improving the water quality in the deep water. . For example, if the dissolved oxygen concentration is about 5 ppm near the lower end of second pipe 2, then
At the upper end of the range, the concentration will be around 8pp+n, and this will be released into the deep water, making it possible to supply oxygen to the deep water, where the dissolved oxygen concentration has so far been close to Oppm.

(4> In addition, the descending flow velocity in the first pipe 1 may be small enough to form a circulation flow, for example, about 0°5 m/see. In this case, the cross-sectional area of the first pipe 1 is 1rY'
1', the capacity of the blower 6 will be approximately 5 kW, which will significantly reduce power costs and save energy.

FIG. 2 is a block diagram showing another embodiment of the present invention, in which the second pipe 2 is attached inside the upper part of the first pipe 1, and its lower end opening 7 is connected to the first pipe 1. It is located outside of. Also, the head tank 3 is connected directly to the first tank.
It is connected to the upper end of the pipe 1 and supported underwater by a floating body 4.

According to the configuration of this embodiment, the air lift section, that is, the second
Since the cross section of the pipe 2 can be made small, a high air lift effect can be obtained with a small amount of air.

[Effects of the Invention] As described above, according to the present invention, by using a modified version of the conventional deep shaft, oxygen-dissolved water can be sent to deep layers using only a low-pressure blower. It is possible to improve water quality in ponds, etc. and prevent spoilage easily and with energy savings.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing one embodiment of the oxygen supply device according to the present invention, FIG. 2 is a schematic diagram showing another embodiment of the invention, and FIG. 3 is a schematic diagram of a conventional oxygen supply device. It is. 1... First pipe 2... Second pipe 3... Head tank 4... Floating body 5... Air diffuser 6... Blower

Claims (1)

[Claims] a first pipe reaching a deep part of the water, an upper end opening located on the outside or inside of the upper part of the first pipe, a lower end opening located on the outside of the first pipe, and the first pipe; a second pipe that is much shorter than the second pipe; a head tank that maintains a common water level above the first and second pipes; a floating body that supports the head tank;
An oxygen supply device for deep water, comprising an air diffuser inserted inside a pipe.