JPH06343993A - Intermittent air pumping-up method and device for sea water - Google Patents

Abstract

PURPOSE:To reduce the viscosity of sea water, lessen the specific gravity, improve its diffusion properties and improve the dissolved oxygen amount by mixing fine air at the end of pumping-up operation. CONSTITUTION:An intermittent air pumping-up device 2 is set in sea water to be purified, and foam shots 24 are supplied intermittently to a pumping-up cylinder 1 of the pumping-up device 2, and pumping-up carried out by the buoyancy of foam shots. For instance, air of 630 liter/minute-840 liter/minute is fed to the pumping-up cylinder 1 of 50cm diameter, and foam shots 24 are fed intermittenly to carry out the pumping-up of average flow rate of 1m/ second-1.2m/second. On the other hand, an air diffusing panel 14 is disposed outside the pumping-up cylinder 1, and fine foams are fed from the air diffusing panel 14 at the rate of 300 liter-400 liter per minute to diffuse air. In that case, the diameters of fine foam are 1-100mum. Fine foams of almost 1/2 of pumping-up water is mixed into the water by the treatment. The viscosity of sea water is reduced by the arrangement to lighten the specific gravity and its diffusion properties are improved and the dissolved oxygen amount can be increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reduces the viscosity of seawater and reduces its specific gravity by mixing fine air bubbles into the pumped water by an intermittent air pumping device, and improves its diffusivity.
The present invention relates to a method and an apparatus for intermittent air pumping in seawater for the purpose of improving the amount of dissolved oxygen.

[0002]

2. Description of the Related Art Conventionally, a water pump is installed upright in water and bubbles are intermittently supplied to the water to pump the water on the bottom of the water to the surface of the water. There are numerous proposals for a water purification method and apparatus by using the above method (Japanese Patent Publication No. 2-16408).

There has also been proposed a technique for mixing fine air bubbles in a part of the pumping cylinder (Japanese Patent Laid-Open No. 62-136286).
issue).

[0004]

[Problems to be solved by the invention] The intermittent air pumping system is installed not only in Japan but also in foreign countries, and makes a great contribution to the rectification of a large amount of water. However, since seawater generally has high viscosity, there is a problem that the diffusion distance becomes short.

In addition, in the technique of mixing fine bubbles into the pumping cylinder, in the case of pumping water utilizing the buoyancy of the fine bubbles themselves, not only the efficiency thereof is remarkably low but also the diffusion radius becomes remarkably small when the bubbles are continuously supplied. (For example, radius 10-2
Since it is about 0 m), it is not suitable for rectifying a large amount of water and was not used in conventional pumping cylinders.

[0006]

According to the present invention, however, the conventional bubble carrier in the intermittent air pumping device is used as it is (that is, the pumping efficiency by the bubble carrier is maintained), and a large amount of fine bubbles are mixed in the jetted pumping water. By doing so, the above-mentioned conventional problems have been solved.

That is, the invention of the method is a method in which a predetermined amount of air is intermittently supplied to a water pump standing upright in the water, and the buoyancy of bubbles caused by the air is used to pump water while intermittently changing the flow velocity. This is an intermittent air pumping method for seawater, which is characterized by mixing fine bubbles at the end of pumping. Still another aspect of the present invention is characterized in that the fine bubbles are made to have a fine bubble diameter or are mixed with the fine bubbles, and the fine bubbles are mixed with entrained water. .

Next, in the invention of the apparatus, an auxiliary cylinder is installed outside the intermittent air pumping cylinder at a predetermined interval and at least protrudes above the upper end of the pumping cylinder, and fine air bubbles are generated in the auxiliary cylinder. It is an intermittent air pumping apparatus for seawater, characterized by being provided with a generating means. The auxiliary cylinder of still another invention is installed integrally with the pumping cylinder or separately, and a large-diameter auxiliary cylinder is continuously provided at the upper end of the pumping cylinder, and a means for generating fine bubbles is provided in the auxiliary cylinder. It was installed. Further, the fine bubble generating means of another invention is a mesh installed in the auxiliary cylinder for crushing the bubble pocket or a diffuser for blowing out fine bubbles, and keeps a predetermined interval above the pumping cylinder. It has a floating fishing reef for crushing bubbles.

The fine air bubbles are formed by means of jetting pressurized air through a biscuit disc having fine continuous pores. Thus, when the bubble diameter is about 100 μm or less, it takes a long time (for example, 24 hours or more) for the once mixed bubbles to be separated from the water, so the mixed water containing the bubbles diffuses as it is, and the seawater In addition to decreasing the viscosity of, the specific gravity becomes lighter, and the water surface must be laterally diffused.

That is, the diffusion radius is 100 as in the case of fresh water.
It can reach more than 0m.

[0011]

[Action] Therefore, in addition to increasing the amount of dissolved oxygen, it has an extremely effective effect on the growth of fish and algae, and when it is used as a fish reef, fish can gather together with a large amount of plankton to form a favorable ecosystem. You can

[0012]

Embodiment 1 In the method of the present invention, an intermittent air pumping device is installed in the sea to be cleaned, and a bubble can is intermittently supplied to the pumping cylinder of the pumping device to pump water by its buoyancy.

For example, 630 liters / minute to 840 liters / minute of air is supplied to a pumping cylinder having a diameter of 50 cm, and bubbles are intermittently supplied to pump water at an average flow rate of 1 m to 1.2 m / sec.

On the other hand, an air diffuser is provided on the outside of the pumping cylinder, and 300 to 400 liters of minute air is supplied from this air diffuser to diffuse the air. The diameter of fine air in this case is 1
It is 0 to 100 μm.

With the above arrangement, about 1/2 of the fine air is mixed into the pumped water. Thus, the mixed water has a low specific gravity and loses its viscosity.

[0016]

[Embodiment 2] An embodiment of the present invention will be described with reference to FIGS. An intermittent air pumping device 2 having a pumping cylinder 1 is installed in water. Next, the auxiliary cylinder 3 is installed outside the intermittent air pumping device 2 at a predetermined interval.

In the intermittent air pumping device 2, the air chamber 4 is fitted and fixed to the outside of the lower part of the pumping cylinder 1, a large number of floats 5 are fixed to the outside of the upper part, and the weight is attached to the lower end through the cords 6. 6a are connected.

In the air chamber 4, an outer cylinder 8 is fitted outside the inner cylinder 7 fitted to the lower part of the pumping cylinder 1 at a predetermined distance, and at an intermediate portion between the inner cylinder 7 and the outer cylinder 8. The partition cylinder 9 is fitted and fixed, and communication holes 10, 11 and 12 are provided in the lower part of the pumping cylinder 1, the inner cylinder 7 and the upper part of the partition cylinder 9, respectively.

A water passage hole 13 is formed in the lower side wall of the auxiliary cylinder 3, and an air diffuser 14 is installed between the inside of the lower portion and the air chamber 4. In the figure, 15 and 16 are hoses, 17, 18 and 19
Are upper and lower closing plates of the air chamber.

The intermittent air pumping device 2 is installed in the sea as shown in FIG.

Then, when pressurized air is fed from the hose 15 as shown by the arrow 20, the pressurized air is accumulated in the air chamber 4, but the amount of air in the air chamber increases, and the water level in the communication hole 11 increases. When it reaches, the air in the air chamber passes through the communication holes as indicated by arrows 21, 22, 23, enters the pumping cylinder 1 to become the bubble hole 24, and floats as indicated by arrow 25.

Therefore, as the bubble container 24 rises, an upward flow is generated in the pumping cylinder 1 as indicated by an arrow 25 to pump water.

On the other hand, when pressurized air is supplied to the air diffuser 14 of the auxiliary cylinder 3 through the hose 16 as shown by the arrow 26, innumerable fine air bubbles 27 are generated from the air diffuser 14 and as shown by the arrow 28. Rise to.

Therefore, the fine air bubbles 27 that have risen in the auxiliary cylinder 3
The mixture of water and water mixes with the rising water in the pumping cylinder 1, and this mixed water diffuses radially as indicated by arrows 29 and 29.

Since the mixture has a low specific gravity, it proceeds in a lateral direction without settling and collides with a coast or the like to enter the bottom of the water.
It is inverted again as shown by arrow 30 and approaches the pumping cylinder 1.

In the same manner as above, water of 500,000 to 1,000,000 tons can be purified for 3 to 7 days by vertically convection with one pump.

In the above embodiment, since the auxiliary cylinder 3 is provided, air bubbles are dispersed prior to the amount of water entrained by the pumping water in the pumping cylinder 1, and then the amount of water in the pumping cylinder and the mixed water are mixed to each other in a short time. A large amount of mixed water can be produced and diffused radially.

[0028]

Third Embodiment The embodiment shown in FIG. 3 is an auxiliary cylinder 3 of the second embodiment.
Is integrated with the intermittent air pumping device 2, and the floating chamber 31 is provided on the outer periphery of the upper portion of the auxiliary cylinder 3. In the figure, reference numeral 32 is a connecting member.

According to the embodiment of FIG. 3, since the auxiliary cylinder 3 can be moved together with the intermittent air pumping cylinder 2 or the depth can be adjusted,
It is suitable for water purification on a relatively deep continental shelf (for example, water depth 20 m to 50 m) or water purification on aquaculture farms such as marine farms. Particularly in a farm, there is an advantage that the flow direction of seawater can be changed by moving the intermittent air pumping device. The operation effect and the bubble mixing effect of the intermittent air pumping cylinder 2 are the same as those in the second embodiment, and a description thereof will be omitted.

[0030]

[Embodiment 4] In the embodiment of FIG. 4, a large-diameter cylinder 33 is continuously provided above the pumping cylinder 1, and a net 34 for crushing the bubble container 24 is provided inside the large-diameter cylinder 33. is there.

In this embodiment, fine bubbles are generated without installing an air diffuser, but since the bubble diameter is relatively large, the mixing duration of seawater and fine bubbles becomes short and Since the amount of mixture cannot be adjusted, it is suitable for a pump with a relatively small capacity. For example, it can be used as a farm for farmed fish, seaweed or shellfish.

In the embodiment of FIG. 5, instead of the net 34 of the embodiment of FIG. 4, the air diffuser 14 is installed, and the inside of the lower portion of the large diameter cylinder 33,
Alternatively, a water passage hole 35 is provided on the side wall. In the figure, 43 is a floating chamber.

According to this embodiment, it is possible to control the production amount of fine bubbles and to obtain a large amount of entrained water.

However, since the entrained water is limited to seawater which is relatively close to the surface of the water, there are restrictions on its use. That is, if a large amount of circulation is not required for seawater on the seabed side, for example,
It can be applied when the sea is relatively deep.

As for the effects of intermittent air pumping in FIGS. 4 and 5, the same detailed description as in the third embodiment will be omitted.

The diameter ratio between the large diameter cylinder and the pumping cylinder is appropriately designed with the aim of preventing the pumping resistance from becoming excessive by stretching the net in FIG.

Further, in FIG. 5, it is determined in consideration of the amount of entrained water.

[0038]

[Embodiment 5] The embodiment of FIG. 6 is a case where a floating body 37 for crushing the bubble container 24 is installed above the pumping cylinder 1.

That is, the floating body 37 connected by the rope 38 is installed above the pumping cylinder 1. Therefore, the rising water collides with the floating body 37, and the air hole 24 is crushed and mixed into the diffusion water.

If necessary, the net frame 40 may be installed, or the air diffuser 41 may be provided in the vicinity.

In the embodiment of FIG. 7, the floating body 37 is combined with a floating fishing reef 42. The floating reef 42 is provided with a landing string 39 such as seaweed to improve the living environment of the fish. For example, a floating reef with a diameter of about 10 m can be used as a movable marine ranch. Since the operation and effect related to the pumping cylinder are the same, detailed description will be omitted.

[0042]

EFFECTS OF THE INVENTION According to the present invention, since fine air bubbles are mixed in pumped water, the conventional thermocline is used to improve the viscosity peculiar to seawater, enhance the diffusion efficiency, and make a mixture of air and water. There are various effects such as enabling wide area diffusion by transcendental theory.

However, the dramatic increase in the amount of dissolved oxygen also has the effect of enabling efficient marine aquaculture.

[Brief description of drawings]

FIG. 1A is a partially enlarged cross-sectional view of an embodiment of the present invention. (B) Similarly, an enlarged sectional view of the air chamber.

FIG. 2 is an explanatory view showing the installation state of the same.

FIG. 3 is a partially enlarged cross-sectional view of another embodiment.

FIG. 4 is a partially enlarged cross-sectional view of another embodiment.

FIG. 5 is an enlarged view of a partial cross section having the air diffuser.

FIG. 6 is a magnified view of a slope in which a buoyant body for crushing air bubbles is provided above the pumping cylinder.

FIG. 7 is an enlarged view in which a part of the example in which the floating fishing reef is provided is omitted, and which has been reduced.

[Explanation of symbols]

 1 Pumping Cylinder 2 Intermittent Air Pumping Device 3 Auxiliary Cylinder 4 Air Chamber 5 Float 6 Rope 7 Inner Cylinder 8 Outer Cylinder 9 Partition Cylinders 10, 11, 12 Communication Hole 13 Water Passage Hole 14 Air Diffuser 15, 16 Hose 17, 18 , 19 Closing plate 24 Bubble container 27 Micro bubble 31 Floating chamber 32 Connecting material 34 Net plate 35 Water passage hole 37 Floating body

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location C02F 3/20 ZAB Z F04F 1/18 ZAB A 2125-3H

Claims (8)

[Claims] 1. A method of intermittently supplying a predetermined amount of air to a pumping pipe standing upright in water and pumping while intermittently varying the flow velocity by using the buoyancy of a bubble in the air, the end of the pumping A method for intermittent air pumping in seawater, characterized in that fine air bubbles are mixed into the water. 2. The fine air bubble is characterized in that the fine bubble is made fine or the fine air bubble is supplied and mixed.
The intermittent air pumping method for seawater as described. 3. The intermittent air pumping method for seawater according to claim 1, wherein the fine bubbles are mixed with the entrained water. 4. An auxiliary cylinder is provided outside the intermittent air pumping cylinder at a predetermined interval and at least protruding above the upper end of the pumping cylinder, and means for generating fine bubbles is provided in the auxiliary cylinder. An intermittent air pumping device for seawater. 5. The intermittent air pumping device for seawater according to claim 4, wherein the auxiliary cylinder is installed integrally with the pumping cylinder or separately. 6. A large-diameter auxiliary cylinder is connected to the upper end of the pumping cylinder,
The intermittent air pumping apparatus for seawater according to claim 4, wherein a means for generating fine bubbles is installed in the auxiliary cylinder. 7. The intermittent air pumping apparatus for seawater according to claim 6, wherein the means for generating the fine bubbles is a net for crushing the bubble cavities installed in the auxiliary cylinder or an air diffuser for blowing out the fine bubbles. 8. An intermittent air pumping apparatus for seawater, characterized in that floating fishing reefs for crushing air bubbles are provided at a predetermined interval above a pumping cylinder.