KR101068594B1 - A micro-bubble generator and liquid treatments using thereof - Google Patents

Abstract

The present invention extends in the longitudinal direction and a space formed therein; An inlet connected to one side of the lower end of the main body to allow a mixed liquid mixed with gas and liquid into the main body; A spiral mixed liquid guide member extending upwardly and connected to the inlet to provide a moving path of the mixed liquid introduced into the inlet; An impingement plate installed adjacent to the end of the mixed liquid inducing member and colliding with the mixed liquid having passed through the mixed liquid inducing member to form an ultra-mini strength cloth; And connected to the upper one side of the main body relates to an ultra-mini-foam generating device comprising a discharge port for discharging the liquid containing the ultra-mini-foam formed by the impingement plate.

Description

Micro-Bubble Generator And Liquid Treatments Using Thereof

The present invention relates to an ultra-micropore generating device, and more particularly, to induce a liquid mixture containing a gas flowing into the ultra-microporous bubble generating device to collide with a wall surface and to generate a liquid by using a micro-bubble generated by the collision. It relates to an ultra-microporous foam generating apparatus dissolved in a liquid and a liquid treatment method using the same.

Activated sludge method commonly used in biological wastewater treatment is to decompose organic matter by various microorganisms, and it is necessary to supply oxygen as its operating condition, and the treatment efficiency is directly related to oxygen transfer efficiency. The higher, the higher the processing efficiency.

Typically, oxygen consumed by the activated sludge method is supplied by an acid device such as an acid engine, a bubble acid engine or a microbubble acid engine, or a mechanical aeration device such as a simplex or surface stirring method.

By the way, the oxygen supply method using an acid device uses a method of injecting air into the bubble acid engine or the micro-bubble acid engine by using a separate pump for supplying air, and thus requires a lot of power. By maintaining the size of the bubble discharged through the hole provided in the size of about 2 to 10mm, the contact area between the bubble and the wastewater is small, and the residence time for sufficiently dissolving oxygen in the wastewater is insufficient. Particularly, in the ozone injection process, the existing ceramic microbubble diffuser has a generated ozone bubble diameter of 2 to 10 mm, and the rising speed of the bubble is 24 cm / sec, so that the residence time of ozone in the wastewater is about 20 to 30 minutes. to be. Therefore, it is necessary to have an ozone recovery facility to recover ozone that has not been dissolved into waste water.

In the case of a mechanical aeration device, it is not easy to transfer oxygen to the deep part of the wastewater to be treated because the oxygen contained in the atmosphere is physically stirred by the wastewater stored in the reservoir to dissolve in the wastewater.

In order to overcome such a problem, Korean Patent Registration No. 0444886, an inlet through which a liquid containing gas enters, a wastewater guide member providing a path of the inflowed liquid, and a liquid passing through the wastewater guide member collides with an ultrafine bubble. An ultra-fine bubble generator is disclosed that includes an impingement plate for forming a discharge port and a discharge port through which a liquid containing fine bubbles is discharged.

However, the above-mentioned ultra-micropore bubble generator has a discharge port for discharging the liquid containing the ultra-microporous bubble is provided on the lower side of the ultra-microporous bubble generator, so that some floating bubbles accumulate from the upper portion of the ultra-fine bubble generator and operate for a long time. Afterwards, the residence time of the wastewater may be shortened due to the accumulated air, and thus there is a problem in that the air in the ultra-mini-foam generating device must be periodically discharged to the outside.

In particular, the ultra-mini-foam generated by the ultra-mini-foam generating device has a portion of the gas accumulates in the upper part of the ultra-mini-foam generating device with the liquid due to the property to float, so that the gas-liquid ratio of the gas and the liquid (waste water) is 4 to 4 by volume. The gas / liquid contact efficiency is reduced by being limited to 8% by volume (eg liquid flow rate 50-100 m ³ / min at gas flow rate 4 m ³ / min).

In addition, in the case of the conventional ultra-micropore bubble generator, a mixture of gas and liquid must be injected into the ultra-fine bubble generator at a higher pressure in order to overcome the decrease in efficiency caused by the reduction of the gas / liquid contact ratio. There is a problem.

The present invention is to provide a mixed solution at a high flow rate by forming a mixed liquid moving path of the gas and liquid to generate the ultra-mini-foam, at the same time to produce the ultra-mini-foam, while the ultra-mini-foam is Provided is a micro-miniature foaming apparatus to prevent stagnation on the top.

The present invention

A main body extending in a longitudinal direction and having a space formed therein; An inlet connected to one side of the lower end of the main body to allow a mixed liquid mixed with gas and liquid into the main body; A spiral mixed liquid guide member extending upwardly and connected to the inlet to provide a moving path of the mixed liquid introduced into the inlet; An impingement plate installed adjacent to the end of the mixed liquid inducing member and colliding with the mixed liquid having passed through the mixed liquid inducing member to form an ultra-mini strength cloth; And it is connected to the upper one side of the main body to provide an ultra-mini-foam generating device comprising a discharge port for discharging the liquid containing the ultra-mini-foam formed by the impingement plate.

In addition,

Provided is a liquid processing apparatus comprising the ultra-mini-foam generator.

In this case, the liquid processing apparatus includes a storage tank in which a liquid to be treated is stored; A pump connected to the reservoir to suck and discharge the liquid stored in the reservoir; An injector connected to the pump to allow the liquid discharged from the pump to pass and to mix a gas to be dissolved into the liquid into a liquid to generate a mixed liquid of the gas and the liquid; It may be connected to one side of the injector may include a micro-miniature foaming device for producing a liquid containing the ultra-miniature foam is introduced into the mixed liquid discharged from the injector.

In the ultra-mini-foam generator according to the present invention, the ultra-mini-foam can be manufactured by colliding a gas mixed liquid with a collision plate.

In addition, the ultra-micro-foaming device allows the ultra-mini-foam to stay in the liquid for a long time, improve the contact area of the gas / liquid, as well as providing a mixed liquid at a desired flow rate at a low pressure to provide ultra-micro-foaming It can be manufactured to not only reduce the power cost required during the treatment, but also to increase the gas / liquid contact ratio by preventing the ultra-bubble from stagnating on the upper portion of the ultra-miniature bubble generator.

1 is a cross-sectional view showing an ultra-miniature cloth generator according to the present invention,
2 is a block diagram showing a liquid processing apparatus including the ultra-miniature bubble generator according to the present invention;
Figure 3 is a block diagram showing a sewage / wastewater treatment system including the ultra-miniature gun generator according to the present invention,
4 is a view showing the dissolved oxygen change according to the use time of the ultra-miniature bubble generator according to the present invention,
Figure 5 is a flow chart of the material balance of the ultra-miniature bubble generator according to the present invention.

In one aspect, the invention extends in the longitudinal direction and the space formed therein; An inlet connected to one side of the lower end of the main body to allow a mixed liquid mixed with gas and liquid into the main body; A spiral mixed liquid guide member extending upwardly and connected to the inlet to provide a moving path of the mixed liquid introduced into the inlet; An impingement plate installed adjacent to the end of the mixed liquid inducing member and colliding with the mixed liquid having passed through the mixed liquid inducing member to form an ultra-mini strength cloth; And it is connected to the upper one side of the main body to provide an ultra-mini-foam generating device comprising a discharge port for discharging the liquid containing the ultra-mini-foam formed by the impingement plate.

In another aspect, the present invention provides a liquid processing apparatus including the ultra-miniature bubble generator.

In this case, the liquid processing apparatus includes a storage tank in which a liquid to be treated is stored; A pump connected to the reservoir to suck and discharge the liquid stored in the reservoir; An injector connected to the pump to allow the liquid discharged from the pump to pass and to mix a gas to be dissolved into the liquid into a liquid to generate a mixed liquid of the gas and the liquid; It may be connected to one side of the injector may include a micro-miniature foaming device for producing a liquid containing the ultra-miniature foam is introduced into the mixed liquid discharged from the injector.

The ultra-micro-foam generating device according to the present invention is a device for producing a super-micro-foaming cloth by mixing a liquid, for example, sewage, waste water or a mixture thereof with a gas and then collides with the wall surface at high speed.

Here, the ultra-fine strength gun is 0.03 to 0.2mm and the ascending speed is about 0.1 to 0.8cm / sec, which is very small compared to the particle size of 2 to 10mm shown in the conventional diffuser, and may stay in the liquid phase for a long time. Physical advantages and the advantages of providing a large surface area.

In addition, the gas according to the present invention is not particularly limited as long as it is a gas capable of generating ultra-miniature bubbles, such as air and / or oxygen.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, the following description is only for the purpose of specifically describing the present invention, and the scope of the present invention is not limited by the following description.

1 is a cross-sectional view showing a micro-miniature foam generating apparatus according to the present invention, Figure 2 is a block diagram showing a liquid processing apparatus including a micro-miniature foam generating apparatus according to the present invention, Figure 3 is a micro-miniature foam generating according to the present invention A schematic diagram showing a sewage / wastewater treatment system comprising a device is described together.

As shown in Figures 1 to 3, the ultra-miniature gun generator 2 according to the present invention includes a main body 4 extending in the longitudinal direction and the space formed therein; An inlet 6 connected to one side of the lower end of the main body 4 so that a mixed liquid mixed with gas and a liquid flows into the main body 4; A spirally mixed mixture inducing member 10 extending upwardly to be connected to the inlet 6 to provide a moving path of the mixed liquid introduced into the inlet 6; An impingement plate 12 installed adjacent to one end 24 of the mixed solution guide member 10 to collide with the mixed solution having passed through the mixed solution guide member 10 to form an ultra-mini strength cloth; And a discharge port 8 connected to the upper one side of the main body 4 through which the liquid including the ultra-fine cloth formed by the collision plate 12 is discharged.

The ultra-mini-foam generator 2 according to the present invention is to increase the dissolved oxygen or dispersion efficiency of a liquid by preparing a liquid containing the ultra-mini-foam by contacting gas and liquid with each other. The strength gun generator is not particularly limited.

Here, the liquid may be sewage, waste water or a mixture thereof, and the gas may be air or oxygen.

The main body 4 according to the present invention provides an appearance of the ultra-miniature cloth generator 2.

At this time, the main body 4 is not particularly limited in shape, but may be formed in a cylindrical shape extending in the longitudinal direction and having a space formed therein, for example, extending in the longitudinal direction.

The inlet 6 according to the present invention is connected to one side of the main body 4, for example, the lower end side of the main body 4 so that the mixed liquid mixed with gas and liquid can be introduced into the main body 4. .

The mixed liquid guide member 22 according to the present invention provides a movement path of the mixed liquid introduced through the inlet 6.

At this time, the mixed liquid inducing member 22 is provided inside the main body 4 to extend along the longitudinal direction of the main body 4 of the ultra-mini-foam generator 2, specifically the ultra-mini-foam generator 2. .

In a particular embodiment, the mixed solution inducing member 22 may have a spiral shape extending in the longitudinal direction of the main body 4, for example, a spiral shape extending upward.

The helical behavior allows the mixed liquid of the gas and liquid introduced into the mixed liquid inducing member 22 to move along the spiral mixed liquid inducing member 22 and increase the flow rate.

Here, as the mixed solution guide member 22 is configured in a helical shape, it provides a faster flow rate due to turbulent flow under the same pressure condition than simply configuring the mixed solution guide member 22 in the form of a tube extending in the longitudinal direction. It can be easily formed an ultra-mini strength cloth.

In another particular embodiment, the mixed liquid guide member 22 according to the present invention, the end 24 of the mixed liquid guide member 22 having a particularly spiral shape, increases the flow rate of the mixed liquid passing through the mixed liquid guide member 22. It may be finished in the form of decreasing diameter toward the end 24, for example conical shape.

The impingement plate 12 according to the present invention is installed to be adjacent to the mixed solution guide member 22 and is provided at the end 24 of the mixed solution guide member 22, for example, at the end of the mixed solution guide member 22. The mixed liquor discharged from (24) collides to form an ultra-mini strength cloth.

In this case, the impingement plate 12 may have a shape having an area larger than the distal diameter of the mixed solution guide member 22.

The mixed liquid colliding with the impingement plate 12 is ultra-saturated due to the collision, and the gas contained in the mixed liquid is dissolved into the liquid.

Here, for easy contact between the gas and the liquid, the impingement plate 12 may be formed in a convex protruding form or a concave curved form in which a portion colliding with the mixed liquid is raised.

In addition, the ultra-mini strength foam formed due to the collision of the mixed liquid is changed in size depending on the flow rate and the injection pressure, it is usually preferred to have a size of 0.03 to 0.2mm.

In this case, the smaller the size of the droplets formed by the ultra-micro-strength can increase the contact area between the gas and the liquid, and in order to increase the contact area to increase the injection pressure of the mixed liquid discharged from the mixed liquid guide member 22 Alternatively, the diameter of the mixed liquid guide member 22, for example, the diameter of the conical end 24 provided in the mixed liquid guide member 22 may be formed to be small.

The injection pressure is 0.3 to 5kg _f / cm ² , preferably 1 to 3kg _f / cm ² It is preferable.

Here, when the injection pressure is lower than 0.3kg _f / cm ² , it is difficult to generate ultra-fine force gun, 5kg _f / cm ² When higher, the power ratio for the mixed liquid injection is increased.

The discharge port 8 according to the present invention provides a path through which the liquid containing the ultra-fine foam formed by the impingement plate 12 is discharged.

Here, the discharge port 8 is connected to the upper one side of the main body 4 is collided with the collision plate 12 to discharge the liquid containing the ultra-mini strength gun generated.

In particular, when the discharge port 8 is provided on the upper side of the main body 4, it is possible to prevent the ultra-miniature cloth from stagnating on the upper portion of the ultra-miniature cloth generator 2.

In addition, the ultra-mini-foam generator 2 according to the present invention includes a baffle plate 14 and an impingement opening 14 to block the flow of the mixed liquid containing the ultra-mini-foam fabric so that gas is easily dissolved into the liquid. 8) can be installed between.

Here, the baffle plate 14 is a vertical plate shape based on the longitudinal direction of the main body 4, and the ultra-low intensity cloth is installed by installing a circular hole having a diameter of 0.3 to 0.7 cm at intervals of 1 to 2 cm on the surface of the plate. To impede the flow of liquid.

On the other hand, the ultra-mini-foam generator 2 according to the present invention is connected to the reservoir 22, the injector 18, and / or the pump 20, the liquid treatment device, specifically the ultra-mini-foam generator The liquid treatment apparatus can be configured.

Here, the liquid may be sewage, wastewater or a mixture of sewage and wastewater, in which case, the ultra-micropore generating device 2 is applied to a sewage / wastewater treatment system 24 for treating sewage / wastewater.

The liquid processing apparatus including the liquid processing apparatus, in particular the ultra-miniature bubble generator, comprises a reservoir 22 in which a liquid to be treated is stored; A pump 20 connected to the reservoir 22 to suck and discharge the liquid stored in the reservoir 22; An injector 18 connected to the pump 20 to allow the liquid discharged from the pump 20 to pass and to mix a gas to be dissolved into the liquid into the liquid to generate a mixed liquid of the gas and the liquid; It may include an ultra-mini-foam generating device (2) is connected to one side of the injector 18, the mixed liquid discharged from the injector 18 is introduced into a liquid containing the ultra-mini-foam.

At this time, the liquid treatment device is provided between the first pressure gauge (not shown) and the ultra-miniature bubble generator 2 and the reservoir 22 to measure the pressure on one side of the injector 18 into which gas is introduced, if necessary. It is possible to further install a second pressure gauge (not shown) for adjusting the discharge pressure.

On the other hand, the method for producing an ultra-mini-foam using the ultra-mini-foam generating device (2) comprises the steps of preparing a mixed liquid of gas and liquid by incorporating gas into the movement path of the liquid; Ultra-bubble forming step of colliding the mixed liquid with the impingement plate at an injection pressure of 0.3 to 5kg _f / cm ² to form a liquid containing ultra-micro bubbles.

The operation of the ultra-miniature gun generator 2 according to the present invention having such a configuration will be described as follows.

First, the mixed liquid of the gas and the absorbing liquid is introduced into the main body 4 of the ultra-mini-foam generating device 2 through the inlet 6, and the mixed liquid introduced into the main body 4 through the mixed liquid guide member 22. ) Penetrates the center and leads to the top.

At this time, the mixed liquid guide member 22 is formed in a spiral shape, the end of the conical finish, the flow rate of the mixed liquid passing through the mixed pressure liquid guide member 22 is increased, more easily to generate ultra-fine foam can do.

On the other hand, one side of the impingement plate 12 is positioned perpendicular to the mixed liquid guide member 22 at a predetermined distance from the distal end 24 of the mixed liquid guide member 22 toward the inner side of the upper end of the ultra-mini strength cloth generator 2. Thus, the high-pressure mixed liquid discharged from the end 24 of the mixed liquid inducing member 22 collides with the collision plate 12 at high speed, thereby generating ultra-fine strength cloth.

The ultra-mini-foam generated in this way flows through the baffle plate 14 to the top of the ultra-mini-foam generator 2, and the baffle plate 14 delays the flow of the liquid including the ultra-mini-foam bubbles. The gas constituting the resulting ultra-mini-foam can be easily dissolved and dispersed in a liquid such as, for example, sewage and / or waste water, and serves to promote contact between the gas and the liquid.

Subsequently, the liquid including the ultra-micro-foaming cloth passed through the baffle plate 14 is discharged to the outside through the discharge port 8 provided at the upper end side of the ultra-mini-foaming device 2.

The size of the ultra-mini strength cloth prepared by the above-described method is 0.03 to 0.2 mm, and the ascending speed is 0.1 to 0.8 cm / sec, which has advantages such as physical advantages and a large surface area where gas can stay in the liquid phase for a long time. .

In particular, the ultra-fine foam fabricated according to the present invention is smaller than the particle size of 2 to 10mm shown in the conventional diffuser, and larger than the particle size of 0.001 to 0.05mm generated by using an air compressor.

In addition, as a conventional sewage / wastewater treatment method, the floating flotation treatment method is a treatment method of first contacting microbubbles with contaminants and floating them to remove them. The smaller the size of the microbubbles, the larger the surface area and the higher the contact efficiency. There is a problem that the floating power is lowered.

Therefore, since the floating flotation treatment method has to increase both the contact efficiency and the flotation force to increase the flotation treatment efficiency, the appropriate size of the microbubbles is about 0.1 mm, and when the size of the microbubbles is 0.1 mm or less, the contact efficiency with contaminants is increased. When the bubble height is 0.1mm or more, the bubble serves to increase the flotation force, and the particle size of 0.03 to 0.2mm prepared by the ultra-miniature bubble generator according to the present invention is suitable to be applied to the floating flotation treatment method.

On the other hand, the ultra-mini-foam generator 2 can be configured by connecting a series of additional devices to configure a liquid treatment device, the operation of the liquid treatment device will be described as follows.

First, the pump 20 is used to suck liquid from the reservoir 22 in which liquid, for example, sewage and / or waste water, is stored and supplied to the injector 18.

At this time, the path through which the liquid formed in the injector 18 passes is reduced in diameter and increases. Accordingly, the liquid pressure in the injector 18 decreases and increases.

Therefore, at the boundary point where the diameter of the injector 18 decreases and increases, an external gas, for example, air and / or oxygen, is installed to allow the external gas to move to the injector 18 due to the pressure difference. Allow incorporation into liquids.

Then, the liquid mixture of the liquid and gas is passed through the injector 18 to the ultra-microporous bubble generator 2 is produced into the ultra-microporous fabric.

At this time, the liquid treatment apparatus including the ultra-microporous bubble generating apparatus according to the present invention can be applied to the sewage / wastewater treatment system 24 for treating sewage and / or wastewater.

As one example, FIG. 3 is a block diagram showing a sewage / wastewater treatment system including the ultra-miniature bubble generator according to the present invention.

The sewage / wastewater treatment system 24 shown in FIG. 3 is connected to the flocculation mixing tank 28 and the flocculation mixing tank 28 into which the livestock wastewater flows, and stores the livestock wastewater treated by the flocculation mixing tank 28. Reservoir 22; A pump 20 connected to the reservoir 22 and sucking the livestock wastewater stored in the reservoir 22 and supplying it to the injector 18; Livestock wastewater including an injector 18 connected to the pump 20 to mix air into the livestock wastewater provided from the pump 20 and air connected to the injector 18 and supplied from the injector 18. It may include an ultra-miniature foam generating device (2) for producing a livestock wastewater containing the ultra-micron foam to provide to the storage tank (22).

At this time, the agglomeration and mixing tank 28 is provided with a stirrer 30 to agitate livestock wastewater, the storage tank 22 is a floating floater 32 is installed in the ultra-fine foam generator 2 The contaminants condensed with the air force are contacted in the storage tank 22 and then floated to treat the wastewater.

Here, since the storage tank 22 processes the flocculated flotation due to the floating floater 32 installed, the storage tank 22 may be referred to as a floating float.

In addition, the flocculation mixing tank 28 forms a relatively large floc by agglomerating / coagulating contaminants by injecting a chemical such as a flocculant, a coagulant, and / or a pH regulator into the livestock wastewater.

At this time, the drug administered to the livestock waste water is used in the art, for example, used in the art, such as alum (poly), poly aluminum chloride (PAC), ferric chloride, polymers and / or pH regulators Can be.

In addition, the livestock wastewater introduced into the cohesion mixing tank 28 may be stirred by the stirrer 30 to more easily generate flocs.

Hereinafter, the present invention will be described in detail through examples. However, the following examples are only for illustrating the present invention in detail and are not intended to limit the scope of the present invention by these examples.

≪ Example 1 >

As shown in FIG. 1, an inlet 6 is connected to one end of a cylindrical body 4 having a height of 120 cm and a diameter of 25 cm, and an outlet 8 is connected to an upper end of the cylindrical body 4.

Then, after installing the mixed liquid inducing member 10 having a spiral shape having a diameter of 5 cm extending in the longitudinal direction to be connected to the inlet 6 inside the main body 4, the end 24 of the mixed liquid inducing member 10 is formed. A curved impact plate 12 having a diameter of 20 cm was installed on the top so as to be spaced 5 cm upward.

Then, water mixed with air was supplied to the inlet 6 at a pressure of 3.5 kg _f / cm ² . At this time, the pressure of the discharged fluid was 1.8kg _f / cm ² .

Figure 4 shows the dissolved oxygen change according to the use time of the ultra-microporous foam generating apparatus according to Example 1, as shown, supersaturated dissolved oxygen 9.1mg / l in 2 seconds after the operation of the ultra-microporous foam generating device It was found that the state was reached.

Comparative Example 1

Performed in the same manner as in Example 1, but was installed to connect the discharge port (8) for discharging the liquid containing the ultra-miniature gun on the lower side of the main body 2, the mixed liquid guide member for providing a path for moving the liquid and air (10) A tube extending longitudinally with a diameter of 5 cm was used.

<Experiment>

5 is a flow chart showing the mass balance of the ultra-miniature cell generation device according to the present invention, and various variables defined below, that is, a mass transfer coefficient (K _La ), a standard oxygen transfer efficiency (SOTE), and a standard Standard Aeration Efficiency (SAE) was calculated to compare the behavior of the ultra-mini-foam generator according to Example 1 and Comparative Example 1.

Here, the method for calculating the variable used the method described in the embodiment of Patent Registration No. 048286 "Liquid bubble generating device and a liquid treatment method using an ultra fine bubble generating device".

The comparison results are shown in Table 1.

As shown in Table 1, when comparing Example 1 and Comparative Example 1, the mass transfer coefficient was 81.2 min ⁻¹ to 82.1 min ⁻¹ , and the standard oxygen transfer efficiency was 60.9% to 61.2%, and the standard aeration efficiency was 6.5 kg. It increased from / kwh to 6.8kg / kwh. This was found to reduce power costs by dissolving and delivering oxygen more efficiently to the liquid with less power, for example 4.6% more efficiently.

In addition, the ultra-mini-foam generator according to Example 1 generated the ultra-mini-foam bubbles with an average size of 100 μm of gas (air).

<Example 2>

Suspension Injury Treatment of Livestock Wastewater Using Ultra-miniature Bubble Generator

As shown in FIG. 3, a cohesion mixing tank 28 having a width, length, and height of 1.22m × 2.44m × 1.53m is provided, and the width, length, and height are 1.8 at the rear end of the cohesion mixing tank 28. The floating flotation tank 22 which is m * 4.6m * 1.75m was installed.

Next, the pump [centrifugal pump, willow pump, Korea] and the injector [Venturi injector, Mazzei, USA] were sequentially connected to the floating flotation tank 22, and then the rear end of the injector was used for ultra-fine strength according to the first embodiment. The bubble generator (2) was connected and installed.

Then, the outlet 16 of the ultra-miniature bubble generator 2 connected to the injector was connected to the floating flotation tank 22.

In this case, two agitators [propeller type and paddle type stirrer, Korea] are installed in the flocculation mixing tank 28, and a floating flotation machine [LAF low pressure floating flotation tank, Korea] is installed on the upper part of the floating flotation tank 22. It was.

Then, wastewater was injected into the flocculation mixing tank 28 at a flow rate of 13.3m 3 / hr, and then 4.7 kg / hr of aluminum sulfate [Alum liquid 8%, Korea] as an inorganic coagulant and a polymer coagulant [solid phase 100] were used. %, Korea] was added 0.4kg / hr and stirred with a stirrer to produce a floc.

At this time, in order to maintain the pH of the cohesion mixing tank 28 in the pH range of 6.5 to 8 using sulfuric acid or caustic soda was maintained an appropriate pH.

The floc generated wastewater flows into the floating flotation tank 22, and a part of the wastewater introduced into the floating flotation tank 22 is sucked by a pump and passed through an injector, and the ultra-fine strength at a pressure of 3.5 kg _f / cm ² is achieved. It was fed to the bubble generator (2) to produce ultra-miniature bubbles.

Then, the wastewater containing the ultra-micro-cells is supplied to the floating flotation tank 22 to raise the contaminants aggregated with the ultra-micro-cells to treat the wastewater.

The results are shown in Table 2.

Comparative Example 2

The same method as in Example 2, except that the ultra-mini-foam generator according to Comparative Example 1 was used instead of the ultra-mini-foam generator according to Example 1.

The results are shown in Table 3.

As shown in Table 2 and Table 3, the processing efficiency of the COD and SS according to Example 2 and Comparative Example 2 were similar to each other, but the processing efficiency of BOD, TN and TP was found to be significantly higher in Example 2. .

<Example 3>

Total Phosphorous Treatment of Industrial Wastewater Using Ultra-Micro Velocity Generator

As shown in FIG. 3, a mixing tank having a horizontal, vertical, and height of 1.0m × 1.2m × 1.7m and a coagulation tank 28 of 1.5m × 2.0m × 2.7m are provided, and the cohesion mixing tank 28 is provided. At the rear end of the column, a floating flotation tank 22 having a width, a length, and a height of 2.5 m × 5.0 m × 2.7 m was installed.

Next, the pump [centrifugal pump, willow pump, Korea] and the injector [Venturi injector, Mazzei, USA] were sequentially connected to the floating flotation tank 22, and then the rear end of the injector was used for ultra-fine strength according to the first embodiment. The bubble generator (2) was connected and installed.

Then, the outlet 16 of the ultra-miniature bubble generator 2 connected to the injector was connected to the floating float 22.

At this time, two agitators (propeller type and paddle type stirrer, Korea) were installed in the cohesion mixing tank 28, and a floating flotation device [LAF low pressure floating flotation tank, Korea] was installed at the upper part of the storage tank 22.

Then, the wastewater was injected into the flocculation mixing tank 28 at a flow rate of 1600 m 3 / day, and then 431.7 kg / day of aluminum sulfate [Alum liquid 7%, Korea] was added as a flocculant, followed by stirring with a stirrer. Generated.

At this time, in order to maintain the pH of the cohesion mixing tank 28 in the pH range of 6.5 to 8 using sulfuric acid or caustic soda was maintained an appropriate pH.

The floc generated wastewater flows into the floating flotation tank 22, and a part of the wastewater introduced into the floating flotation tank 22 is sucked by a pump and passed through an injector, and the ultra-fine strength at a pressure of 3.5 kg _f / cm ² is achieved. It was fed to the bubble generator (2) to produce ultra-miniature bubbles.

Then, the wastewater containing the ultra-micro-cells is supplied to the floating flotation tank 22 to raise the contaminants aggregated with the ultra-micro-cells to treat the wastewater.

The results are shown in Table 4.

Comparative Example 3

In the same manner as in Example 3, but instead of the ultra-mini-foam generator according to Example 1, the ultra-mini-foam generator according to Comparative Example 1 was used.

The results are shown in Table 4.

As shown in Tables 4 and 5, the treatment efficiencies of T-N according to Example 3 and Comparative Example 3 were similar to each other, but it was found that the treatment efficiencies of BOD, COD and SS were significantly higher in Example 3.

In particular, as shown in Table 2 to Table 5, the processing efficiency of Example 2 and Example 3 using the ultra-miniature gun generator according to the present invention is 5 to 20 as a whole than the processing efficiency of Comparative Examples 2 and 3 As high as%.

This indicates that the ultra-micro bubble generator used in the Example has a larger amount and more stable microbubbles generated than the ultra-micro bubble generator used in the comparative example, so that the microflocs are easily removed, thereby increasing the treatment efficiency.

As described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the exemplary embodiments described above should be understood as illustrative and not restrictive in all aspects. The scope of the present invention should be construed that all changes or modifications derived from the meaning and scope of the following claims and equivalent concepts rather than the detailed description are included in the scope of the present invention.

2: ultra-miniature gun generator 4: body
6: inlet port 8: outlet port
10 mixed solution guide member 12 impingement plate
14: baffle plate 16: drain hole
18: injector 20: pump
22: reservoir, floating float 24: end
26: sewage / wastewater treatment system 28: cohesion mixing tank
30: stirrer 32: floating buoy

Claims (7)

A main body extending in a longitudinal direction and having a space formed therein; An inlet connected to one side of the lower end of the main body to allow a mixed liquid mixed with gas and liquid into the main body; A spiral mixed liquid guide member extending upwardly and connected to the inlet to provide a moving path of the mixed liquid introduced into the inlet; An impingement plate installed adjacent to the end of the mixed liquid inducing member and colliding with the mixed liquid having passed through the mixed liquid inducing member to form an ultra-mini strength cloth; And an outlet through which the liquid is connected to the upper one side of the main body and discharges the liquid including the ultra-micro-strength foam formed by the impingement plate. The method of claim 1,
The mixed solution inducing member is a micro-miniature gun generator comprising a terminal formed in a conical shape. The method of claim 1,
The liquid micro-generator comprising a liquid, sewage, waste water or a mixture thereof. The method of claim 1,
And a baffle plate disposed between the impingement plate and the outlet to allow the ultra-micro-foam to easily dissolve into the liquid. A liquid processing apparatus comprising the ultra-mini-foam generator according to any one of claims 1 to 4. The method of claim 5,
The liquid treatment apparatus including the ultra-miniature bubble generator includes a storage tank in which a liquid to be treated is stored; A pump connected to the reservoir to suck and discharge the liquid stored in the reservoir; An injector connected to the pump to allow the liquid discharged from the pump to pass and to mix a gas to be dissolved into the liquid into a liquid to generate a mixed liquid of the gas and the liquid; And an ultra-microporous bubble generator, which is connected to one side of the injector and includes a micro-foam bubble generator to introduce a mixed solution discharged from the injector into a liquid containing the ultra-fine bubble. The method of claim 6,
The liquid treatment apparatus using an ultra-miniature foam generating device comprising the liquid is sewage, waste water or a mixture thereof.

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