JPS6216157B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deep water aeration device for the purpose of improving water quality in deep water areas such as dams or lakes.

Conventionally, water quality in lakes and marshes has been improved by intermittently blowing pressurized air into a cylinder placed vertically in the water to generate vertical convection in the water, guiding water near the surface to the depths and improving overall storage capacity. Known methods include increasing the amount of oxygen (Patent No. 499563), blowing out air from a number of small holes in pipes laid on the bottom of the water, and spraying water pumped from deep onto the surface of the water. . Although the above-mentioned convection method using pressurized air is effective, it is not limited to shallow or deep underwater layers, and convection is generated throughout the water, so it is useful when forming deep water layers in lakes and marshes with relatively large water depths. Furthermore, it is difficult to say that it is the best method for improving water quality only in the deep water layer. Furthermore, although methods of ejecting microbubbles from pipes laid at the bottom of the water or methods of sprinkling pumped water on the water surface are effective for improving water quality in relatively small amounts of water, such as water storage tanks, The problem was that it required huge equipment costs and was extremely impractical in areas where there were many lakes or dams. However, in lakes and dams with relatively large water depths, it is practically impossible to lay a bubble generating pipe over the entire water bottom, and in lakes and dams where the water depth fluctuates, there is no method to pump up water and sprinkle it on the water surface. In fact, it is difficult to adopt.

However, in the present invention, fine air bubbles are ejected from the lower part of a cylinder installed vertically into water, and the air bubbles are mixed with water flowing in from the lower side of the cylinder, and gas-liquid separation is performed at the upper part of the cylinder. Since the structure is configured to release water to the sides (horizontal direction) of the cylinder and release air upward, convection can be generated over a wide range in the lateral direction at a desired depth. Therefore, it was possible to efficiently improve the water quality below a desired water depth with extremely simple and small equipment, and the above-mentioned conventional problems were solved. By injecting an appropriate amount of particulate flocculant into the cylinder, the particulate solids floating in the deep water layer are aggregated and settled,
It has also made it possible to treat turbid water and improve the turbid water layer near the bottom of a dam, which was previously considered extremely difficult.

That is, to explain the present invention with reference to an embodiment, a porous partition plate 3 is provided slightly above the bottom plate 2 of a bottomed cylindrical body 1 made of synthetic resin or metal to form an air chamber 4. is connected to the compressor 5 by an air supply hose 6. Cylindrical body 1 in the upper part of the air chamber 4
An inflow pipe 7 for introducing water from below is provided on the side wall of the
The bases of the two are connected. An annular flange 8 is provided horizontally extending from the upper end of the cylindrical body 1. Above the annular flange 8, a small gap 9 is provided between the circumferential edges of a conical lid 10 to face each other. pipe 11
An arc-shaped baffle plate 12 is provided inside the conical lid 10 and above the cylindrical body. A float 13 is fixed around the exhaust pipe 11, and a weight 15 is connected to the lower end of the cylindrical body 1 via a chain body 14. In the above embodiment, a cylindrical body and a conical lid were used, but it goes without saying that a prismatic cylinder and a pyramidal lid may also be used. Furthermore, the inflow pipe 7 is not necessarily required for the inflow of water from below. For example, it is also possible to simply drill an inlet into the side wall of the cylinder. Furthermore, it is also conceivable that the annular collar 8 is not provided horizontally but in a tapered shape (diagonally upward or downward), or that the annular collar 8 is not provided. The baffle plate 12 is provided to receive and change the direction of the rising mixed fluid (mixture of water and air), apply lateral flow force, and facilitate separation of gas and liquid. Not limited to one piece,
It is also possible to arrange a plurality of baffle plates in a scale-like manner with small gaps between them. Further, the baffle plate 12 may be a punched metal plate or a mesh plate to further enhance gas-liquid separation.

Next, in the embodiment shown in FIG. 2, an injection pipe 16 for coagulant inflow is diametrically installed at the upper part of the inflow pipe connection part of the cylindrical body 1, and one end of the injection pipe 16 is connected via a liquid feeding hose 17. and is connected to the pump 18. The apparatus of each of the embodiments described above is installed, for example, in the deep water layer 20 of the waste 19. In each of the embodiments described above, an exhaust pipe is connected to the conical lid, but it goes without saying that a plurality of exhaust ports may be provided instead of using an exhaust pipe. The conical lid mentioned above is intended to prevent the discharged water from rising and to separate gas and liquid. Therefore, it is natural to design the conical lid appropriately within a range that meets this purpose.

Air supply hose 6 in the state shown in Figs. 1 and 4
When pressurized air is fed into the air chamber 4, small air bubbles rise from the pores of the partition panel 3 as shown by the arrow 21 due to the rise in the air pressure inside the air chamber 4, so that the lower end of the inflow pipe 7 The water is sucked up from below as shown by arrow 22, and the water flows inside the cylinder along with air bubbles as shown by arrow 23.
rise like. In this case, since the bubbles are fine, the oxygen in the bubbles dissolves and mixes into the water as much as possible. The gas-liquid mixture that has risen as described above collides with the baffle plate 12 and flows laterally as shown by the arrow 24. On the other hand, the separated air bubbles adhere to the lower surface of the conical lid 10 or float up as they are to the exhaust pipe 11.
From there, it rises as shown by arrow 25 and is discharged out of the water. The water that has flowed laterally as described above flows for a while near the upper surface of the deep water layer as shown by arrow 26, then settles and flows back as shown by arrows 27 and 28. This is because the temperature of the water that has risen inside the cylinder is slightly lower than the water temperature at the top of the deep water layer, but when it is released as shown by arrow 26, it mixes with the water near the release.
Since the difference in water temperature becomes smaller, sedimentation due to the difference in specific gravity becomes slower, and there is no risk of sedimentation directly below the water immediately after release. Therefore, the horizontal flow distance is relatively long, and the reflux range is expanded. In addition, when a flocculant (for example, sulfuric acid salt or polymer flocculant) is injected as in the embodiment shown in Fig. 2, the flocculant remains mixed to some extent within the cylinder and is released laterally from the top of the cylinder.
It will diffuse into the deep water layer. Therefore, the solid particles in the deep water layer are aggregated, and the turbid water undergoes solid-liquid specific gravity separation during reflux, allowing the turbid water to be treated.

That is, according to the present invention, microbubbles are allowed to rise into the deep water layer from the lower part of the vertical cylinder, and the bubbles are mixed with the water sucked in from the bottom of the cylinder, and the air and liquid are separated at the upper part of the cylinder. Therefore, if the cylinder is installed in the deep water layer, convection will occur over a relatively wide area in the deep water layer, eluting oxygen from the air into the deep water layer and adjusting the amount of dissolved oxygen in the area to an appropriate level. It has the effect of adjusting. It is also possible to inject a flocculant, so
It also has the effect of efficiently improving the turbid water layer that has formed deep within. However, since the cylinder body, air supply device, bubble generator, and gas-liquid separation device are connected, there is no power unit installed in the underwater installation part, so there is no risk of failure and it is possible to operate continuously with the same efficiency for a long time. be.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view of an embodiment of the present invention in an installed state, Fig. 2 is a partially sectional front view of another embodiment, and Fig. 3 is the same as A-A in Fig. 1. The sectional view and FIG. 4 are also front views when the device of the present invention is installed in a dam. 1... Cylindrical body, 3... Partition board, 4... Air chamber,
5...Compressor, 6...Air supply hose, 7...
... Inflow pipe, 8 ... Annular collar, 10 ... Conical lid,
11...Exhaust pipe, 12...Break plate, 13...
Float, 15... Weight, 16... Injection pipe, 17
...Liquid supply hose, 18...Pump, 19...Dam, 20...Deep water layer.

Claims (1)

[Claims] 1. An air chamber is provided in the lower part of the cylindrical body through a partition panel having a large number of small holes, an air supply hose is connected to the air chamber, and an inlet is provided in the lower side wall of the cylindrical body. There is,
A conical lid is placed above the cylindrical body through a predetermined gap, an exhaust port is provided in the conical lid, a float is fixed above the cylindrical body, and a weight is fixed below. Features a deep water aeration device. 2. The deep water aeration device according to claim 1, wherein the conical lid has a conical or pyramidal shape, and a convex arc-shaped baffle plate is provided inside the lower part of the conical lid. 3. The deep water aeration device according to claim 1, wherein the partition panel is made of ceramic or synthetic resin and has a large number of parallel small holes arranged closely together. 4. The deep-water aeration device according to claim 1, wherein a float is fixed to the conical lid, a weight is fixed to the lower end of the cylindrical body, and the cylindrical body is installed vertically into the water. 5. An air chamber is provided in the lower part of the cylindrical body through a partition panel having small holes, a pressurized air supply hose is connected to the air chamber, and an inflow pipe is connected to the lower side wall of the cylindrical body, An annular flange is provided on the outside of the upper part of the cylindrical body, a conical lid is placed above the annular flange at a predetermined interval, an exhaust port is connected to the conical lid, and a float is fixed above the cylindrical body. A deep water aeration device characterized in that a weight is fixed below, a drug injection pipe is installed inside the lower part of the cylindrical body, and the drug injection pipe is connected to a drug hose. 6. The drug injection pipe according to claim 5, wherein the drug injection pipe is diametrically suspended in a cylindrical body slightly above the inlet of the inflow pipe, and has a large number of through holes in its upper wall. Deep water aeration device. 7. The deep water aeration device according to claim 6, wherein the inflow pipe is curved into a convex arc shape, and the lower end thereof is directed downward.