JPS638475Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an air spray type jet intake swirl flow aeration device that purifies wastewater by increasing dissolved oxygen. In recent years, industrial wastewater has been flowing into lakes, reservoirs, fish ponds, etc.
The influx of sewage discharge water, household water, etc. is intense, exceeding the limits of self-purification, resulting in water pollution, which is becoming a serious problem not only from the standpoint of environmental hygiene but also from the standpoint of water quality conservation and fish production. . Various methods have been proposed to purify this polluted water, but the method of increasing dissolved oxygen through aeration can be said to be the most effective method. This is an essential method especially when raising fish farms.

The device of the present invention is a device that most efficiently performs the aeration described above, and uses the jet action of pressurized water to pump air into the flexible water pipe that extends from the submersible pump installed at the bottom of the water to the annular nozzle floating on the water surface. The jet is characterized by sucking in water, creating a swirling flow using a spiral vane tube, mixing the discharged water and the suctioned atmosphere in a flexible tube while swirling the gas and liquid, and discharging the mixture into the atmosphere from an annular nozzle. Features an intake swirl flow aeration device.

Conventional devices of this type include: (1) Air splash method A method in which pump discharge pressure water is splashed into the air from a nozzle, perforated pipe, etc. to bring oxygen in the air into contact with raw water.

(2) Forced air supply system: An air supply plate, air supply point, etc. connected to a pressure air source underwater.
A method in which perforated plates, nozzles, jets, pipes with small holes, etc. are installed, and pressurized air is forced into the water to bring the water into contact with the air.

(3) Mechanical surface aeration method A method that mechanically agitates the water surface by installing an impeller on the water surface and rotating it.

(4) Jet method A method in which a jet nozzle is attached to the discharge side of the pump, and atmospheric air is sucked in by the ejector action and brought into contact with the discharged water.

(5) Jet aerator method A jet nozzle is installed on the discharge side of the pump, and pressurized air is blown into the jet flow to mix gas and liquid and discharge the mixture.

(1) The aerial dispersion method only ejects from a nozzle or porous pipe, so the contact time and contact rate with the atmosphere is short, and the oxygen dissolution efficiency is low.

(2) The forced air supply method generates fine air bubbles, so the materials used for the air blowing plate and blowing tube are dense, so
The pressure loss due to passage resistance is large, and when the pressurized air source is stopped, there is a lot of clogging with earth and sand due to backflow.Furthermore, the microbubbles that are generated only rise and do not move laterally, which limits the range of oxidation effects on wastewater. In addition, perforated plates, nozzles, jets, pipes with fine holes, etc. either do not generate microbubbles, or even if they do, the contact time with water is short and the oxygen dissolution efficiency is low.

(3) The mechanical surface aeration method is mainly used for surface water and is not suitable for deep water.

In both the (4) jet method and (5) jet aerator method, the ejection direction is often one-sided, and the area of influence is localized, making them unsuitable for purifying polluted water in a wide area. In particular, jet aerator systems require other sources of pressurized air.

The object of the present invention is to provide an aeration device with high oxygen dissolution efficiency that can be used in wide areas and eliminates the drawbacks of the above-mentioned systems by simple means.

The device of this invention will be explained based on a drawing. A lower cone 4 is fastened to a float 1 floating on the water surface by a nozzle attachment band 2 and a fastening band 3, and a tripod support plate 5 is provided inside the lower end of the cone.
Then, the flexible water supply pipe 6 is fastened with a fastening band 10 to a truncated conical annular nozzle constituted by an upper cone 9 connected with a bolt and a nut 8, with the spacing adjusted by an adjustment spacer 7. A jet nozzle 1 is connected to the discharge pipe 12 of the submersible pump 11, which is also installed at the bottom of the water.
3. A nozzle pipe 15 containing a built-in distributor 14 is connected with a flange 16, and a bendable air suction pipe 17 is arranged in the nozzle pipe 15 between the jet nozzle 13 and the distributor 14, and the other end is connected. is opened to the atmosphere, and further, the nozzle pipe 15, the spiral vane swirling flow pipe 18, and the flexible pipe connecting pipe 19 are connected with flanges 20 and 21, respectively, and the flexible pipe connecting pipe 19 and the water supply flexible pipe 6 are connected with a fastening band. Connect with 22. 23 is an electric wire for an underwater motor, 24 is a buoy for floating the air suction pipe 17 to the water surface, 25 is a switchboard, 26 is a water bottom surface, and 27 is a water surface.

To explain the operation of the device of the present invention configured as described above, this device can be used in lakes, reservoirs, etc. as shown in Figure 7.
When a place where the aeration effect is most effective, such as a fish pond, is selected and dropped into the water, the submersible pump 11 acts as a weight, and the conical annular nozzle installed at the position where it is grounded on the bottom surface 26 of the float 1. It floats on the water surface 27 due to buoyancy. At this time, the conical annular nozzle automatically moves up and down together with the float 1 by bending and expanding/contracting the flexible water pipe 6 in response to changes in the water level, so there is no need to specifically adjust its height.

Next, when the submersible motor 11 is started, the sewage and anoxic water at the bottom of the water body are sucked in, and when they are discharged into the upper discharge pipe 12, they are ejected from the jet nozzle 13 in the nozzle pipe 15, and when entering the distributor 14. Air suction pipe 17 due to aspirator action
More air is sucked in and fine bubbles are formed. Next, the fine bubble mixed water enters the spiral vane swirl flow pipe 18, and while being given a swirling flow by the impeller inside the pipe, it passes through the flexible pipe connection pipe 19 and swirls inside the water supply flexible pipe 6 as shown in Fig. 6. At this point, the gas-liquid mixing action sufficiently dissolves oxygen, and the conical annular nozzle on the water surface disperses it into the air in the shape of a morning glory. It exhibits an excellent aeration effect, including the turbulence of the water surface, and the distribution condition is uniform around the circumference due to the influence of the swirling flow.

As mentioned above, the device of the present invention has an extremely simple structure, and its aeration effect is effective and large in preserving and improving water quality, so it has great industrial effects.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view of the device of the present invention, Fig. 2 is a longitudinal side view and a sectional view taken along the line A-A of the conical annular nozzle, Fig. 3 is a plan view of the float and the conical annular nozzle, and Fig. 4 5 is a longitudinal side view and a plan view of a nozzle tube including a jet nozzle and a distributor, FIG. 6 is an explanatory diagram of the function, and FIG. FIG. 3 is an explanatory view showing the operation of the device installed on the bottom of the water. 1... Float, 2... Knotzzle mounting band, 3... Fastening band, 4... Lower cone, 5...
Tripod support plate, 6... Flexible water pipe, 7... Adjustment spacer, 8... Bolt and nut, 9... Upper cone,
10... Fastening band, 11... Submersible pump, 12
...Discharge pipe, 13...Jet nozzle, 14...
... Distributor, 15... Nozzle tube,
16...flange, 17...air suction pipe, 18...
...Spiral vane swirl flow pipe, 19...Flexible pipe connection pipe, 20...Flange, 21...Flange, 22
... Fastening band, 23 ... Electric wire for underwater motor,
24...Buoy, 25...Switchboard, 26...Water bottom, 27...Water surface.

Claims (1)

[Scope of utility model registration request] The discharge port of the submersible pump installed at the bottom of the water and the inverted conical annular nozzle floating on the water surface are connected by a jet air suction device, a spiral vane pipe swirling flow straightening device, and a flexible water supply pipe that can be bent freely to suck sewage. A jet intake swirl flow aeration device characterized in that the air is mixed with gas and liquid in the supplied water and is radiated into the air in a morning glory shape from an annular nozzle.