JPH0759320B2 - Device for improving dissolved oxygen content in large amounts of water - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention mainly improves low-oxygen water or oxygen-free water in a closed water area to water having a predetermined dissolved oxygen content by supplying high oxygen water and vertical flow. The present invention relates to a device for improving the oxygen content of large amounts of water.

(Prior Art) Conventionally, in a relatively warm region, an intermittent air pumping device has been used for the purpose of improving the dissolved oxygen amount of a large amount of water, and a remarkable effect is obtained in various places.

(Problems to be solved by the invention) However, depending on the subtropical or tropical climate and other weather conditions,
Mainly in lakes, rivers, dams, etc. where the amount of saturated dissolved oxygen is small in closed water areas (for example, where a saturated dissolved oxygen layer is formed with a thickness of about 30 cm to 1 m from the water surface), only with the intermittent air pumping device. In some cases, the purpose of the period cannot be achieved. That is, the intermittent air pumping device improves oxygen-free or low-oxygen water at the bottom by raising oxygen-free or low-oxygen water at the bottom of the water and diffusing the saturated dissolved oxygen water at the surface to the bottom. However, when the saturated dissolved oxygen layer near the water surface is relatively thin, there is a problem that only low oxygen water flows as a whole, which makes rapid improvement of the dissolved oxygen amount difficult.

Especially in an environment where a large amount of oxygen-free water flows in,
The improvement was even more difficult in closed water areas in the inflow area.

(Means for Solving the Problem) Therefore, the present invention positively generates high oxygen water, mixes this with inflow water or an oxygen-free layer or a low oxygen layer, and further oxygen-free water near the bottom of the water, Alternatively, the low-oxygen water is lifted to the surface of the water and mixed by stirring to solve the above-mentioned conventional problems.

That is, the present invention is to install a water intake pipe on the water bottom side of a river or a closed water area, connect the base end of the water intake pipe to the water supply side of the high oxygen water generator, and sprinkle the treated water of the high oxygen water generator. Is laid on an oxygen-free water bottom, and an intermittent air pumping device for vertically circulating convection of water is installed in the closed water area. Further, the high oxygen water production apparatus is one in which an air supply port is provided on one side of a production tower filled with a nitrogen adsorbent and a high oxygen air outlet is provided on the other side, and the outlet is connected to a water treatment tank. .

In the above description, the high oxygen water is characterized in that high oxygen air (oxygen approximately 80%) is blown into low oxygen water or oxygen free water. Further, an intermittent air pumping device is used as a prime mover in order to discontinuously flow up and down. Further, the invention of this device is characterized in that a sprinkler device arranged on the main inflow side, a high oxygen water generation device, a low oxygen water intake device, and an intermittent air pumping device are combined together, and oxygen of a large amount of water is combined. It is a quantity improvement device. The high oxygen water generator is provided with an air supply port on one side of a generation tower filled with a nitrogen adsorbent (for example, zeolite),
A high oxygen air outlet is provided on the other side and is connected to a treated water tank.

As described above, by adsorbing nitrogen in the air,
Generates high-oxygen air, blows this air into oxygen-free water or low-oxygen water to generate high-oxygen water, supplies and diffuses this high-oxygen water to an appropriate place such as a lake, and also intermittently pumps the lake. Since it is stirred and fluidized up and down with, the amount of dissolved oxygen in lakes and marshes can be improved relatively easily. Lakes and the like that have undergone the above treatment contain, for example, 5 mg / position of oxygen. The high oxygen air is, for example, air containing about 80% oxygen, and the nitrogen absorbent is various zeolites.

The present invention is effective when applied to a place where a high oxygen water layer is relatively thin on the water surface, such as a lake in a subtropical zone or a tropical zone. For example, in lakes around the Amazon River, the high oxygen water layer on the surface of a lake with a depth of 100 m and a water volume of 500 million tons is about 30 cm to 1 m, and the oxygen free layer is overwhelmingly intermittent. It is almost impossible to improve the amount of dissolved oxygen only by using an air pump. However, according to the present invention,
It is relatively easy to increase the amount of dissolved oxygen over the whole lake (for example, 5m
g / position).

(Operation) According to the present invention, high-oxygen air is blown into low-oxygen water or oxygen-free water to form high-oxygen water, and this is diffused into low-oxygen water or oxygen-free water. Increase rapidly. On the other hand, water on the bottom side (low oxygen water, oxygen-free water,
The water (partially improved by the above) is pumped to the water surface, stirred with water having a large dissolved oxygen content on the water surface, and then diffused, so that the dissolved oxygen content of the water in the entire closed water region can be reliably increased.

(Embodiment 1) Next, the present invention will be described with reference to the embodiments shown in FIGS. 1 to 3.

Oxygen-free water in the lake 1 is pumped from the water pipe 2 by the pump 3 and supplied to the water treatment tank 4. On the other hand, air is supplied to the air treatment tank 6 by the pump 5, nitrogen is adsorbed from the air taken in the air treatment tank 6 into high oxygen air (for example, 80% oxygen), and this high oxygen air is fed to the water treatment tank 4. Press in as indicated by arrow 33. In the water treatment tank 4, the oxygen in the air is dissolved by bringing the water droplets into contact with the high oxygen air in the usual manner to rapidly form high oxygen water (for example, 40 mg / oxygen). The remaining air is sent to the suction side of the pump 5 again. If this high oxygen water is pumped by the pump 7 to the sprinkler pipe 9 as shown by the arrow 8 and sprinkled from the sprinkler pipe 9, it is rapidly mixed with the low oxygen inflow water flowing in as shown by the arrow 10. For example, assuming that the amount of water flowing in with an oxygen content of 0.5 mg / average is 80 tons per second, 10 times per second from the sprinkling pipe 9
By sparging tons of high oxygen water, the oxygen content of the total inflow water can be made approximately 5 mg /. Such influents usually reach the center of the lake along the bottom of the water, as shown by arrows 11 and 12. Therefore, a large number of pumping devices 13, 13a, 13b are arranged in three rows in a zigzag pattern, and when each pump is operated, vertical convection occurs around each pumping device, and the inflow water, oxygen-saturated water on the water surface and intermediate It is possible to mix oxygen water or low oxygen water to obtain water having a predetermined oxygen concentration.

The pumping device in the above is shown in FIG.
4, an air chamber 15, a floating chamber 16, and a fixture 17 (for example, an anchor). The pumping cylinder 14 is composed of a large number of collecting cylinders (2 to a dozen or more), but for the sake of convenience, the drawing is one. For example diameter 70
A pumping cylinder with a cross-sectional area of 1.5 m ² when 4 cylinders of cm are bundled.
However, if pumping water in the pumping cylinder 14 at 1.5 m / s,
About 200,000 tons will be pumped a day. Therefore, if 30 such pumps are installed, about 6 million tons of water can be pumped per day, and the total amount of water (for example, 500 million tons) can be pumped in 80 days. Pumping is almost
Since it is recognized that it mixes with 10 times the amount of water, the pumping amount may be smaller than the above.

As shown in FIG. 3, the pumping device pressurizes the pressurized air from the hose 18 into the air chamber 15 as indicated by the arrow 19 to sequentially lower the water level 20 of the air chamber, and the water level of the communication hole 21. When the temperature reaches, the air in the air chamber 15 indicates the communication holes 21, 21a, 21b by the arrow 22,
It passes like 23 and enters the pumping cylinder 14, and rises as an air bullet 24. Therefore, the water in the pumping cylinder 14 is pushed up or sucked up as the air bullet 24 rises, so that the water in the vicinity from the lower end of the pumping cylinder 14 is also sucked up as indicated by the arrow 25 and pumped to the water surface. The water reaching the water surface in this way rapidly mixes with the water between the upper end of the pumping cylinder 14 and the water surface. For example, in pumping, the central part of the pumping cylinder is decelerated at a higher speed toward the peripheral part, so it rises in the water while receiving an external force (arrows 31 and 32) from the central part toward the peripheral part. Four
(Fig.), It mixes rapidly with nearby water.

Although there is a difference in specific gravity between the water on the bottom of the water and the water near the surface of the water, the difference in specific gravity becomes small due to the rapid mixing as described above, so the mixed water diffuses rapidly without settling, and is often several hundreds. It can reach m to several thousand m. However,
If the pumping equipment is arranged in a zigzag at 100 m intervals as described above,
The diffusion distance is about 1/2 of the mutual spacing of pumping cylinders (due to mutual interference). Therefore, vertical convection as shown by arrows 26 and 27 in FIGS.

(Example 2) In Example 1, high-oxygen water was mixed with the inflow water and carried to the bottom of the lake, and this was stirred up and down to increase the dissolved oxygen content of the total amount of water. On the other hand, in the embodiment shown in FIG. 2, high oxygen water is discharged to the bottom of the lake, and this is vertically convected by a pumping device to increase the dissolved oxygen content of the entire water.

That is, an intake pipe 26 and a sprinkler pipe 30 are laid on the bottom of the lake 1, and the oxygen-free water taken from the intake pipe 26 is pumped by the pump 29 into the water treatment tank 28.
Sent to.

High oxygen air (oxygen 80% or so) is fed into the water treatment tank 28, and the oxygen-free water is changed into high oxygen water having a dissolved oxygen amount of 40 mg /. Therefore, this high oxygen water is sprayed by the pump 34 to the sprinkler pipe 30.
More back to the bottom of the lake. On the other hand, the pumping device is efficiently stirred in order to convect the water up and down, and the dissolved oxygen amount is averaged, as in the above.

(Effect of the invention) That is, according to the present invention, oxygen-free water or low-oxygen water such as the bottom of the lake is made into high-oxygen water, and this high-oxygen water is guided to the bottom of the lake, and is convected vertically and agitated. Oxygenated water or low oxygenated water becomes aerobic and high oxygenated water rapidly and efficiently to enable fish and other animals to live, while bottom-water aerobic microorganisms propagate to decompose organic matter, generate harmful gases and serve as a nutrient source. It has the effect of preventing elution. When the decomposition of organic matter on the bottom of the lake is completed in this way, oxygen consumption will decrease sharply,
After a certain period of time, the supply amount of oxygen water can be reduced.

Further, if green algae or the like propagate, it is possible that oxygen is supplied by this, and after that, the required amount of dissolved oxygen can be secured by operating only the pumping device.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is an enlarged cross-sectional view of a pumping system, FIG. 4 is an explanatory view showing a state of pumping, and FIG. Similarly, a front view of another embodiment and FIG. 6 are plan views of the same. 1 ... Lake, 2 ... Intake pipe 3 ... Pump, 4 ... Water treatment tank 5,7 ... Pump, 6 ... Air treatment tank 9 ... Sprinkling pipe 13, 13a, 13b ... Water pumping device 14 ... … Pumping cylinder, 15 …… Air chamber 16 …… ・ Floating chamber, 17 …… Fixing device

Claims (2)

[Claims] 1. A water intake pipe is laid on the water bottom side of a river or a closed water area, and the base end of the water intake pipe is connected to the water supply side of the high oxygen water generator, and a sprinkling pipe for treated water of the high oxygen water generator. Is laid on an oxygen-free water bottom, and an intermittent air pumping device for vertically circulating and convection water is installed in the closed water area. 2. A high oxygen water generator is provided with an air supply port on one side of a generation tower filled with a nitrogen adsorbent and a high oxygen air outlet on the other side, and the outlet is connected to a water treatment tank. The dissolved oxygen content improving apparatus according to claim 1, wherein the dissolved oxygen content is improved.