JPS5933459Y2 - Device for dissolving air into water - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an apparatus for producing pressurized water in which air is dissolved, which is used for flotation and concentration of wastewater.

Conventionally, to concentrate sewage, so-called sedimentation concentration has been generally used, in which the sewage that has concentrated and settled at the bottom of the tank is extracted using a sedimentation tank. A method is used in which impurities are floated and separated as scum using air dissolved in the scum to form a scum layer on the surface layer, and this is removed using a scraping device or the like.

This invention relates to a pressurized water production device used for flotation concentration of wastewater that belongs to the latter category, and aims to provide a device with higher dissolution efficiency compared to conventional air dissolution devices of this type. .

Below, this invention will be explained with reference to the accompanying drawings. First, as shown in the drawings, the structure is such that a compressor 3 supplies high-pressure air to a pressurized tank 2 connected to a flotation tank 1. At the same time, an ejector 7 is installed in the pipe line 4 for supplying pressurized water to the pressurized tank 2 by opening an intake pipe 6 that communicates with the high pressure air chamber 5 in the pressurized tank 2. The nozzle 8 provided at the end of the pipe 4 opens into the high-pressure air chamber 5, and the jet water is jetted onto the pressurized water surface in the form of a jet flux.

In the drawing, reference numeral 9 indicates a pressure pump, 10 indicates a pump for supplying raw water, 11.12 indicates a baffle plate provided in the flotation tank 1, and 13 indicates floating scum.

The device according to this invention is constructed as described above. Therefore, in order to dissolve air in water using this device, high pressure water is injected into the pressure tank 2 by the pressure pump 9, and at the same time,
On the other hand, high pressure air may be blown into the pressurized tank 2 by the compressor 3.

That is, the high pressure air in the pressure tank 2 is sucked into the pressurized water from the pressure pump 9 by the ejector 7 and dissolved therein. It is vigorously injected into the air in the form of a jet flux, and the air in the pressurized tank 2 hits the pressurized water surface and is drawn into the pressurized water, and in this pressurized water, the large air particles sucked by a portion of the ejector are also reduced to fine particles. It is dissolved in water.

Among conventional air dissolving devices of this kind, for example, those that use only an ejector spray pressurized water containing air bubbles that has not been suctioned by the ejector and become fine particles into the air chamber in the pressurized tank, so This resulted in the suctioned air being released within the pressurized tank.

In this regard, in this invention, as mentioned above, the pressurized water from the pressurizing pump 9 is ejected in the form of a jet flux onto the pressurized water surface in the pressurizing tank 2, so that the air sucked by the ejector is released in the pressurizing tank 2. It can be finely granulated and dissolved using pressurized water without causing any oxidation.

At the same time, the pressurized water in the pressurized tank 2 is stirred by the jet flux, and the air in the pressurized tank 2 is also entrained in the pressurized water in addition to the air sucked in by the ejector 7. It has been confirmed that the foam generation efficiency of pressurized water is approximately 10% superior to those using only an ejector or only a spray nozzle.

In this way, the pressurized water containing dissolved air is discharged into atmospheric pressure and the pressure is reduced, whereby the dissolved air becomes bubbles and is separated.

Therefore, this air bubble can be used to float and concentrate wastewater.

The attached drawing shows the flow sheet, and the pressurized water discharged from the pressurized tank 2 joins with the raw water sent by the raw water pump 12 halfway through the process and is sent to the flotation tank 1, where the dissolved air becomes bubbles. This device can float slurry, etc. in raw water and separate it from the raw water.

Although the above-mentioned embodiment was used to treat wastewater with dissolved air, it is of course possible to use this in a fish tank or the like.

As is clear from the above explanation, the device according to this invention has an exceptionally high dissolution efficiency compared to conventional air dissolving devices of this type, and can be used to separate slurry, etc. in raw water as scum. It is extremely effective.

[Brief explanation of drawings]

The drawing is a flow sheet diagram of an apparatus for dissolving air into water according to this invention. Explanation of symbols, 2... Pressurized tank, 3...
Compressor 4...Pipe line, 5...
High pressure air chamber, 6... Intake pipe, 7... Ejector 8... Nozzle.

Claims (1)

[Scope of utility model registration request] The compressor 3 supplies high-pressure air to the pressurized tank 2, and in the conduit 4 which supplies pressurized water to the pressurized tank 2, there is an intake pipe that communicates with the high-pressure air chamber 5 in the pressurized tank 2. 6 is opened to form an ejector 7, and furthermore, the nozzle 8 provided at the end of the pipe line 4 is opened into the high pressure air chamber 5, and the jet water forms a jet flux, and the pressurized water is A device for dissolving air into water, characterized in that air is ejected onto a surface.