JPS6154288A - Purifying apparatus of closed water basin - Google Patents

Abstract

PURPOSE:To supply efficiently air into eutrophicated lakes and marshes and to purify water by spouting the surface water mixed with air under the freely rotatable air reservoir shell provided in an air chamber connected to the lower end of a pumping-up pipe which is hung down into the water. CONSTITUTION:A pumping-up pipe 1 is hung down into the water by floating the upper end on the water surface side 100 with a float, etc. and anchoring the lower end to the lake bottom side 101. An air chamber 2 with the lower part opened and contg. a rotatable air reservoir shell 3 is connected to the lower end of the pipe 1. In lakes and marshes, high-temp. surface water rich in dissolved oxygen is supplied into said chamber 2 while sucking air by a water feed device 4, and spouted into the lower part of the air reservoir shell 3. At this place, the surface water is separated from air, discharged from the air chamber 2, and heat-exchanged with low-layer water which is aerated, heated, and purified. Said separated air is collected in the air reservoir shell 3 which is inverted when the amt. of collected air exceeds a specified value. The air moves upward in the pumping-up pipe 1 like a cannon ball. Consequently, the lower-layer water is sucked and discharged to the water surface 100 side, and further aerated and purified.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a purification device for closed water bodies that efficiently supplies and purifies air to closed water bodies such as lakes, reservoirs, and inner bays where eutrophication is progressing. 〇 (Conventional technology) In recent years, eutrophication has progressed in closed water bodies such as lakes and inner bays due to the influx and accumulation of nutrients such as nitrogen and phosphorus from surrounding basins, which has become a social problem. For this reason, currently, the method of regulating organic matter, nitrogen, and phosphorus in the inflow water of closed water bodies is being implemented as an effective measure to prevent eutrophication.

(Problems to be solved by the invention) However, because the entire mechanism of eutrophication has not yet been elucidated and efficient purification methods have not been established, At present, very few attempts have been made to purify and regenerate the water.The present invention was created in view of these conditions, and aims to elucidate the entire mechanism of eutrophication. This is a color scheme designed to purify and regenerate.

(Means for Solving the Problems) The present inventors first considered that the underlying mechanism of eutrophication proceeds as follows.

The lakes and marshes of Japan succumb to the temperate zone, and throughout the year there are two cyclic periods, autumn and spring, and two stagnation periods, winter and summer. During the stagnation period, as shown in Figure 2, the lake is divided into the table M (a), the thermocline (b), and the low layer ((), and the state of the lake water changes vertically.

That is, in the surface layer (a), phytoplankton proliferates through photosynthesis using sunlight, and dissolved oxygen (Do) becomes supersaturated. On the other hand, in the low m/(c) section, Table WI
As the plankton that died in (a) fall and are oxidized and decomposed, Do is consumed and often becomes anoxic.

When this oxygen deficiency condition occurs, H2S begins to be generated and iron, manganese, nitrogen, and phosphorus are eluted at the same time. Then, in the next cycle, the eluted nutrients will diffuse throughout the closed water area, accelerating the progress of eutrophication.

Therefore, in order to break this vicious cycle of eutrophication, it is necessary to supply oxygen to the lake bottom (100) and prevent the elution of nutrients and the like.

Regarding the method of supplying oxygen to lakes, etc., the water depth of the lake, etc.
Depending on the progress of eutrophication, etc., the following two methods can be considered depending on the purpose and function.

■Circulating aeration method: This method destroys the stratification, so it is suitable for lakes and marshes where the water depth is relatively shallow and there is an extreme lack of dissolved oxygen. It is also effective in improving the water quality of water source ponds that are clogged with water that has a strange odor or taste.

■R stone layer aeration method This method provides sufficient oxygen to deep water without destroying the stratification, and is also effective in preventing the temperature of surface water from dropping in the summer and preventing the outflow of turbid water.

The present invention is an apparatus devised by Ton et al. for purifying and regenerating p-closed water areas using a circulating aeration method.

Figure 1 shows the configuration of the present invention.
1), an air chamber (2), an empty cylinder shell (3), and a water supply device (4). Furthermore, (1oo) is the water surface, (mol
) indicates the lake bottom.

The lifting pipe (1) has its upper end fixed to a floating body, etc.) at the water surface (100) @
1, and the lower end is moored to the lake bottom (101) side, so that it is suspended vertically in the water.

The air chamber (2) is injected into the air chamber (2) and the air is transferred to the above-mentioned water pump (
1), which is connected to the lower end of the lift pipe (1) and which also takes in the lower water there. As for its shape, it needs to have a somewhat large internal volume because it is necessary to install an air cylinder shell (3) which will be described later so that it can roll inside, and the air released inside it must be efficiently pumped into the pumping pipe ( 1) In order to allow the water to rise, the upper part is preferably watering can-shaped, and the lower part is preferably open to take in low-lying water.

The air shell (3) is provided in the air chamber (2), and air is stored inside.When the air is filled, it is automatically turned over and the air is removed after turning over. It is installed so that it releases and automatically returns to its original state after being released.

The water supply device (4) mixes surface water and air, draws the mixed water into the air chamber (2), and blows out water below the air cylinder shell (3).

(Function) In the surface layer (a) of lakes, etc., natural aeration occurs at the lake surface (100) due to the influence of wind, etc., and there is also the influence of photosynthesis by algae, so the surface water Dissolved oxygen has reached near saturation value.

However, due to the heat of the sun, the temperature of the lake water surface (100) has risen to near the air temperature.

A water supply device (4
) to pump up the air (arrow A), to suck air (arrow port)
, and conduct the mixed water to the air chamber (2). At this time, some of the air is dissolved due to the increase in water pressure,
The dissolved oxygen concentration in the mixed water becomes even higher. The undissolved bubble-like air rises as shown by arrow C and gradually accumulates in the empty cylinder shell (3). -Increase in dissolved oxygen (9) The surface water escapes and dissolves as shown in arrow 2. It mixes with oxygen-deficient low-level water and aerates the low-level water. At the same time, the temperature of the low-level water increases. On the other hand, when the air accumulated in the air reservoir (3) exceeds a certain amount f, Due to buoyancy, etc., this empty cylinder shell (3) is completely automatically reversed, and at the same time, the air inside the empty cylinder shell (3) turns into bullet-shaped bubbles and blows out all at once into the pumping pipe (1). It rises in the direction shown by the arrow H.The upward movement of these bullet-shaped bubbles is performed intermittently.At this time, low-lying water also rises from the bottom of the air chamber (2) as shown by the arrow in the manner of a lift pump. Inhaled into n, table f'J like arrow g
It is released to the water surface (100) side in (a). Water surface (10
The bubble bomb that reached 0) bursts at the water surface (100) and returns to the water surface (100).
It causes ripples and spreads. At this time, it is not pumped up.
The low layer water spreads along the water surface (100) with ripples, mixes with the surface layer water and spreads while being aerated. A rise in water temperature can be suppressed by mixing low-temperature low-layer water with the same water.

In this way, the present invention maintains the entire closed water area in a circulating state, first aerates the lower layer (C) with surface water containing a large amount of dissolved air, and then utilizes the air sent to the lower layer (c) along with the surface water. The lower layer water is pumped up to the surface layer (a) to provide natural aeration.

(Example) Hereinafter, specific embodiments of the present invention will be described based on the drawings.

Figure 3 shows an embodiment of the present invention. nru.

The lower part of the lift pipe αq engages with the flow h (equipped at the upper part, and connected to the bottom of the lake (101) via the air chamber described later), and with this configuration. It is installed underwater. This type of vertical installation is just an example.
It goes without saying that other methods may be used. The air chamber has a middle part (c) with a larger diameter than the pumping pipe αq, and the upper part is concave in the shape of a watering can and is connected to the pumping pipe αQ.
It connects to the lower end, and the lower part is open, from which low agricultural water will flow.

The air cylinder shell (to) is a cylindrical body having an inclined opening (31) on the side surface, and the air chamber has a hole (K FEE length) on the side surface (
Open the hole (A), insert the other side of the cylinder into it, and then press the pin (A).
It is rotatably attached to the hollow part (c). That is, the opposite side of the slanted opening (31) is closed, and when n1 is filled with water, it slopes due to its own weight so that the slanted opening (31) disappears downward, and when it is filled with air, it moves upwards due to buoyancy. It is joined to the air chamber by the bottle (as if going up and around).

The water supply device (40) includes a pump [41] and an ejector (4
2) and a water pipe (43), the pump (41) pumps up the n1 surface water as shown by arrow A and sends it to the ejector (42).
) to mix by sucking air in the direction of the arrow. This mixed water is sent to the lower part of the air chamber through a water pipe (43) and is ejected below the air cylinder shell (1).

The inventors investigated the bubble rising speed and found that O,a 77L/
Measured values of S were obtained. Therefore, the descending flow rate in the water pipe (43) was kept at 0.3 rIL/s or more.

Also, replace the pump (41) and ejector (42), and install a blower or compressor in the water pipe (43) (compression).
By using a device such as the above, which may be configured to blow air, it is possible to blow surface water rich in dissolved oxygen into the lower layer (C). Also, the undissolved air becomes bubbles and accumulates in the air reservoir.When more than a certain amount of air accumulates, the buoyant force pushes the tilt r4 opening (31) upward, and at the same time, the accumulated air becomes a cannonball. It becomes bubbles and blows out all at once into the pumping pipe αQ. As the water rises, lower water can be pumped up to the surface area (a).

Therefore, it becomes possible to artificially destroy the stratification and maintain the entire water in lakes and marshes in a circulating state.

FIG. 4 shows another embodiment. In this embodiment, only the structure of the air cylinder shells (32) (32a) is different from the previous embodiment, so that part is shown in an enlarged manner. (The same configurations are given the same numbers).

This air cylinder shell (32) (32a) consists of two hemispherical shells (32, 32a) provided oppositely within the air chamber.
It is fixed approximately at the center of a rotating shaft (33) that is provided to be rotatable in the width direction, and is rotatably installed around the center. In the empty cylinder shell 0◇, the undissolved air fed by the water supply device (40) becomes bubbles and accumulates therein, and when a certain amount is accumulated, it rotates due to buoyancy and the accumulated air is released into a cannonball. The water is ejected all at once into the pumped water gCIct as bubbles. Then, the air reservoir (3Za) rotates downward, similarly collects air bubbles in it, and then blows out bullet-shaped air bubbles in the same order as above.

FIG. 5 shows still another embodiment of the present invention, the basic configuration is almost the same as the 11th and 2nd embodiments, but the pumping pipe α
The difference is that a water inlet (11X11a) is provided in Q, and the configuration of the air reservoir (34) is different (the same number is attached to the same configuration).

In other words, there is a water inlet (
11 This is intended to prevent air stagnation (34) from fluctuating by sucking it up from the water ports (n) and (ua) as shown by the arrows.

As shown in Fig. 6, the air reservoir (34) is a hemispherical cup with a biased rO center (35) fused at one end, and a conductive hole (35) in the center inside the air reservoir. The air chamber bottom plate (to) having the air chamber (c) is fixed horizontally and placed on the air chamber bottom plate (QQ) so as to cover the conduction hole (c). In addition to the hemispherical shape, a rectangular cylindrical shape is also suitable for the shape.

In such a device, the air reservoir (c) is passed through the conduction hole (c).
34) When the air accumulated inside exceeds a certain level, the buoyancy lifts the air reservoir (34).

At this time, the air cylinder shell (34) is preliminarily attached to the eccentric weight (3
5) Since it is eccentric, use an eccentric weight! 5 (35)
The air in the air reservoir (34) turns into bullet-shaped bubbles and blows out all at once into the water pump αq. At the same time, the low-level water is also measured in the direction of the arrow and the downward direction of the air chamber (A) and the water inlet (11X11
The water is sucked up from a) and rises in the pumping pipe αq 〇 Figure 7 shows another embodiment of the present invention 0 This embodiment is different from the above-mentioned embodiment. - It is an apparatus that can carry out two-stage aeration of the surface layer (a) and the lower layer (C) without destroying it. Therefore, as in the third embodiment, in addition to providing a water inlet (u
) is different in that it is installed in the middle part (identical components are given the same number).

If the chain α→ is adjusted and installed so that it opens at the bottom of this water supply/drainage port (xz) (lza) 'fc Te8 layer, etc.), the rise of the cannonball-shaped air bubbles will cause the low-level water to flow into the air chamber (a). It is sucked in as shown by the arrow from the lower part and the water inlet (n is discharged to stir the lower layer water. When the bullet-shaped bubbles rise further from there, the water in the middle layer is also sucked in from the water supply and drainage ports (12) (12a) as shown by arrow N, and together with the low-colored water, it flows to the top of the water pump αQ as shown by arrow G. It is discharged. The bubble bullet that reached the water surface (100)
Zoo), it ruptures and spreads out, creating ripples on the water surface (100). The low-layer water and middle-layer water pumped up at this time spread on the water surface (100) with ripples and mix with the surface water while being aerated and spread. In this way, the lower layer (c) and the surface layer (
Part a) is mixed and stirred separately without destroying the parts a) and the other part at the same time, and the supply of oxygen is carried out.

An example in which effects similar to those of the above-mentioned embodiments can be obtained is shown in FIGS. 8 and 9 for reference.

Torera Izu n also has air in the air chamber (360) (3
70) has a different structure. Figure 8 shows the air reservoir (360) of the hemispherical cup placed on the bottom plate 9 of the air chamber and the conduction hole (c).
(through the chain (361) inserted into the bottom plate of the air chamber) downward floating prevention +1? A configuration is shown that engages (362). In such a configuration, air retention (36
(360) t'
It is lifted up by buoyancy and ejected all at once in the form of bullet-shaped bubbles. This space-time cylinder shell (360) can prevent the f9J movement of the anti-surfacing rod (362) and the influence of oscillation caused by low-level water sucked up from below the air chamber ridge, so the 3.4th embodiment A water outlet like (u) (na
) becomes unnecessary. In addition, Fig. 9 shows a cylindrical air reservoir (370) with an open bottom placed on an air chamber bottom plate (250) having a conduction hole (240) in the center, and an air chamber wall above it to prevent floating. Fence (371)'! A configuration with r is shown. Similar to the above-mentioned structure, such a structure becomes a bullet-shaped bubble and suddenly ejects from the air reservoir (370).
``When L71c, this air accumulation (370) is prevented from floating 41
'l11 (37], ) to prevent it from increasing more than necessary. This also includes an empty cylinder shell (37
This eliminates the need to provide water holes α and (lla).

(Effects of the Invention) According to the purification device of the present invention as described above, surface water rich in dissolved oxygen, which is pumped into the water supply device, is mixed with lower layer water and aerated, thereby eliminating oxygen deficiency in the lower layer. At the same time, the low-lying water can be raised to the surface from the pumping pipe and aerated above the water surface by air stagnation, which causes bullet-shaped air bubbles to rise intermittently, so that the closed water area as a whole can be circulated and aerated. This has the advantageous effect of making it possible.

[Brief explanation of drawings]

Fig. 1 is a schematic cross-sectional view showing the structure of the present invention, Fig. 2 is an explanatory diagram showing the situation of a closed water area during the stagnation period, Fig. 3 is a cross-sectional view showing one embodiment of the present invention, and Fig. 4 is a diagram showing other examples. FIG. 5 is a partially enlarged sectional view showing another embodiment, FIG. 5 is a sectional view showing still another embodiment, and FIG.
The figure is an enlarged view showing the hollow cylinder shell of this embodiment, FIG. 7 is a sectional view showing another embodiment, FIG. 8 is a reference drawing showing an example of air trapping having the same effect as the present invention, and FIG. 9 is a reference diagram showing yet another example of air trapping. In the figure, (1) αQ is the water pump, (2) the cage is the air chamber, (3's (azXa2a) (a4) is the air reservoir, (4X4
(100) indicates the water supply system, (100) indicates the water surface, and (101) indicates the lake bottom. Figure 3 ◎ Figure 4

Claims (1)

[Claims] Lifting pipes installed vertically in water, and the lifting pipes an air chamber connected to the lower end of the An air reservoir that can roll on the surface and a surface layer Mix water and air and transfer the mixed water to the empty storage chamber. and inject it below the air reservoir. It is characterized by having a water conveying device for discharging water. Purification equipment for closed water bodies.