KR101586456B1 - Appapatus for controlling fault of purifying water treatment - Google Patents

Abstract

The present invention relates to an apparatus for controlling malfunction in purified water treatment, which comprises: a treatment tank having an introduction line at a lower end side for introduction of raw water and a discharge line on the other side for discharging treated liquid; a float product storing chamber compartmentalized at an upper end part of the interior of the treatment tank; a skimmer formed at an upper part of the treatment tank so as to allow the float products to be introduced into the float product storing chamber; a pressure regulation plate protruding from a lower surface of the treatment tank and having the slope gradient toward an upper direction at a position separated from the introduction line; and a mixed air dissolution tank coupled to the introduction line so as to supply, into raw water, pressurized water in which an air mixture of air and carbon dioxide is dissolved. More specifically, the purpose of the present invention is to provide an apparatus to get rid of causal factors for malfunction in purified water treatment, by regulating pH in raw water while eliminating algae therefrom.

Description

[0001] APPARATUS FOR CONTROLLING FAULT OF PURIFYING WATER TREATMENT [0002]

The present invention relates to a pretreatment method capable of removing algae and the like by floatation by discharging mixed air in which air and carbon dioxide are mixed in raw water to microorganisms in the pretreatment of water purification, ≪ / RTI >

Water treatment, which is a process to improve the water quality of raw water to the purpose of use by using the water of rivers and lakes as raw water, depends on the water quality of the raw water, the use of the water, and the specificity of the watering process. In other words, the water treatment process in which the raw water that is first taken through the multistage process such as the settling tank, the mixed tank, the coagulant tank, the settling tank, the filter paper, etc., is significantly influenced by the water quality of the raw water.

Especially, when the pH is increased due to the algae denaturation in spring and autumn, the flocculation efficiency is lowered in the water treatment process and the required amount of flocculant is increased. In order to cope with this phenomenon, the optimal flocculation concept of injecting an acidic substance such as sulfuric acid into the raw water and lowering the pH of the raw water to an appropriate level and administering the optimum amount of coagulant has been proposed. However, since sulfuric acid is highly corrosive and toxic, Research is underway to control the pH of purified water using carbon dioxide instead.

For example, Korean Patent Publication No. 10-0672055 discloses a technology in which carbon dioxide is used, and it is not easy to sufficiently dissolve carbon dioxide in raw water, and a pretreatment technique for water treatment for removing algae from raw water together with the dissolution of carbon dioxide Is not sufficiently presented.

Korean Patent Publication No. 10-0672055

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an apparatus for eliminating algae from raw water and controlling the pH of raw water to an appropriate level, thereby eliminating obstacles to the water treatment.

In order to solve the above-mentioned problems, the water treatment plant failure control device of the present invention comprises a treatment tank in which an inlet line through which raw water flows is formed at a lower side of one side, and a discharge line through which the treatment liquid is discharged is formed on the other side; A float storage chamber partitioned at an upper end within the treatment tank; A skimmer formed at an upper portion of the treatment tank to allow floating matter to flow into the floating matter storage chamber; A pressure regulating plate projecting from a lower surface of the treatment tank and having an upward slope at a position spaced apart from the inflow line; And a mixed air dissolving tank connected to the inflow line for supplying pressurized water in which mixed air of air and carbon dioxide is dissolved to the raw water.

For example, the mixed air dissolving tank is connected to the inflow line by a supply line, and the supply line is provided with a diffuser for discharging the pressurized water in which the mixed air is dissolved into the inflow line into the micropores.

For example, the diffuser may include a flow tube that communicates with the supply line and through which pressurized water with mixed air dissolved therein flows, and a plurality of impellers mounted to be rotatable and interlocked in communication with the flow tube, A crushing portion forming the slope and a discharge portion formed with the spraying nozzle on the other side, and the pressurized water in which the mixed air is dissolved is discharged from the discharge portion to impart rotational force to the impeller.

As one example, in the plurality of impellers, each of the crushing sections is characterized in that each of the slopes has an upward slope gradient and a downward slope gradient.

For example, the pressure regulating plate may include a plurality of body portions formed between the lower portion of the treatment tank and the inflow line and having a predetermined clearance in the form of a plate, a pressurizing passage is formed upwardly from the downward direction between the body portions, And the width of the pressurizing passage is adjusted by adjusting the inclination gradient.

In one example, the inflow line may further include a pre-treatment device, wherein the pre-treatment device comprises: a raw milk inlet having a spiral guide formed on the inner surface of the tube whose top is blocked; A plurality of hollow fiber membrane units formed of hollow fiber membranes having a predetermined length are fixed by a pair of upper and lower binding members to surround the raw milk feed inlet; A housing having a hollow cylindrical shell having upper and lower ends penetrated while receiving the hollow fiber membrane assembly and having a concentrated water outlet for discharging contaminants by washing; And an upper / lower header formed at a lower side thereof with raw water inlets for supplying raw water through the raw milk inlet, respectively, the upper and lower ends being connected to upper and lower ends of the housing, respectively, .

One example is a vibrating bar, one end of which is fixed to the lower header and the other end is exposed through the hollow fiber membrane assembly. The raw milk feeding inlet is formed by a helical guide, A lower tube formed through the tube; An upper tube communicating with the lower tube by an on-off valve and having a plurality of discharge holes formed at a rim of an upper surface thereof; A rotating shaft projecting from a central portion of the upper tube; A rotation driving part coupled to the rotation shaft at a top of the rotation shaft and formed of a frame ring for connecting a plurality of rotation blades to a plurality of rotation blade ends at a position opposite to the discharge hole; And a plurality of striking ends protruding from the rotation driving unit and striking the vibration bar in accordance with rotation of the rotation driving unit.

As described above, the water treatment plant disturbance control apparatus of the present invention floats and removes cyanobacteria, diatoms, and green algae contained in raw water to suppress the generation of hobby substances, such as Geosmin and 2-MIB, By controlling the hydrogen ion concentration of the strong alkaline raw water to an appropriate concentration by controlling the excessive use of the flocculant by the assimilation, there is an advantage that the occurrence of the obstacle phenomenon in the purification treatment is reduced and the stable operation efficiency is developed.

1 is a schematic view showing a basic example of the present invention,
2 and 3 are schematic views showing a diffuser which is one embodiment of the present invention,
4 is an operational state view showing an embodiment of a pressure regulating plate as a constituent of the present invention,
5 is a schematic view showing another embodiment of the present invention,
Fig. 6 is a cross-sectional view showing a pre-treatment apparatus which is a constitution of Fig. 5,
7 is a detailed view of a portion A in Fig.

Hereinafter, the structure and operation of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, terms and words used in the present specification and claims are to be construed in accordance with the principles of the present invention, on the basis that the inventor can properly define the concept of a term in order to best explain his invention It should be construed as meaning and concept consistent with the technical idea of.

1, the water treatment plant failure control apparatus 1 according to the present invention comprises a treatment tank 1 in which an inflow line 21 into which raw water flows is formed at a lower end of one side and a discharge line 22 through which the treatment liquid is discharged is formed on the other side (2); A float storage chamber (3) partitioned at an upper end within the treatment tank (2); A skimmer (4) formed on the upper part of the treatment tank (2) so as to allow floating matter to flow into the floating matter storage chamber (3); A pressure regulating plate 5 protruding from a lower surface of the treatment tank 2 and having an upward slope at a position spaced apart from the inflow line 21; And a mixed air dissolving tank (6) connected to the inflow line (21) to supply pressurized water in which mixed air of air and carbon dioxide are dissolved to the raw water.

That is, in the present invention, in the treatment of the algae mixed in the raw water, it is possible to control the alkalization of the raw water by the algae while treating the algae with mixed air mixed with carbon dioxide, .

Here, the term " impairment of water purification "is a concept including alkalization of raw water by algae as well as algae incorporated in raw water.

Although the shape of the treatment tank 2 is not limited, FIG. 1 shows a structure in which the top surface is opened. The inflow line 21 is not shown in the figure, but is connected to a water supply source to introduce raw water into the processing tank 2.

As shown in FIG. 1, the discharge line 22 may be configured in various ways. In this case, an example of discharging the overflow water in the treatment tank 2 is shown.

As shown in FIG. 1, it is appropriate that the treatment tank 2 is formed such that a downward slope is formed at a lower surface of the pressure regulating plate 5, So that it can be pumped out to the outside.

The floatation storage chamber 3 is separated from the upper end of the treatment tank 2 and floated on the surface of the float by fine bubbles is floated by the operation of the skimmer 4, (3) so that the floating material is discharged to the outside and processed.

In FIG. 1, one side of the floating water storage chamber 3 extends downward in the treatment tank 2 and no reference numeral is shown at the lower end. However, when a foreign body such as algae is treated by floating and sedimentation, So that the treatment water is allowed to flow over the discharge line 22 through the flow path.

The pressure regulating plate 5 protrudes from the lower surface of the processing tank 2 and has an upward slope at a position spaced apart from the inflow line 21. The pressure is released gradually by the inclined gradient of the pressure regulating plate 5 so that the release condition of the pressurization is induced to the pressurized water in which the mixed air discharged in the form of fine bubbles is diffused by the diffuser 7 in a gentle condition of the pressurized water, To increase the dissolution rate.

When the pressurized water is injected directly into the treatment tank 2 from the inflow line 21 using the diffuser 7, a large amount of carbon dioxide dissolved in the pressurized water is vaporized as it is and the pH control efficiency of the raw water is lowered In the present invention, the pressure regulating plate 5 is constituted. In addition, the pressure regulating plate 5 increases the contact area between the micro-bubbles discharged from the diffuser 7 and the algae to increase the flotation efficiency.

In the meantime, as shown in FIG. 4, the present invention proposes a pressure control plate 5 of another embodiment in order to enhance the pressure control function and the flotation efficiency.

The pressure regulating plate 5 of the present embodiment has a plurality of body portions 51 formed between the bottom surface of the treatment tank 2 and the inflow line 22 to have a plate- And the body portions 51 are integrally interlocked with each other and the inclination gradient is adjusted to adjust the width d of the pressure passage 55 .

4, the plurality of body portions 51 form a constant clearance, and the outermost body portions 51 are connected to the end of the inflow line 22 and the treatment tank 2 by hinge joints 52, respectively, And a connection bar 53 is coupled between the outermost body 51 and the inner body 51 so as to be hinged to the body 51 so as to be hinged to each other, When the inclination gradient of the body portion 51 is changed, the inner body portions 51 are integrally connected to each other to change the inclination gradient.

As the body portion 51 is inclined downwardly due to the variation of the inclination gradient, the width d of the pressurizing passage 55 becomes smaller and the pressing condition becomes larger, so that the dissolution rate of the carbon dioxide In addition to this, the contact area between the microfilm and the algae increases. However, in this case, since the treatment time is increased, the dissolution rate of carbon dioxide may be lowered. Therefore, it is appropriate to adjust the slope gradient in consideration of the treatment conditions such as treatment flow rate and treatment scale.

For example, by adjusting the angle of rotation of one of the hinge joints 52 of the outermost body portion 51, the entire body portion 51 can be adjusted by adjusting the angle of rotation of the hinge joint 52, Can be adjusted.

The mixed air dissolving tank 6 is configured so that mixed air of air and carbon dioxide is dissolved in the pressurized water. Therefore, the mixed air dissolving tank 6 is not shown in the drawing, but a pressurizing means is required.

As shown in FIG. 1, the mixed air dissolving tank 6 is adapted to supply pressurized water by a circulation line 8 connected to the treatment tank 2. The circulation line 8 is provided with a pressurizing pump so that the circulating water is supplied to the mixed air dissolving tank 6 with pressurized water.

The mixed air dissolving tank 6 is connected to the mixed air supplying means 9 and the mixed air supplying means 9 is connected to the circulating line 8 so that the mixed air is mixed with the pressurized water, To the tank (6).

The mixed air supply means 9 mixes the atmospheric air and the carbon dioxide in the mixed air compressor 93 through the vaporizer 92 and the carbon dioxide supplied from the carbon dioxide storage tank 91 to the mixed air .

The pH sensor 23 is connected to the control unit 24 and the control unit 24 controls the pH of the treatment tank 2 by the pH sensor 23, The mixed air supply means 9 is controlled according to the pH concentration of the air to adjust the amount of carbon dioxide mixed in the air.

The mixed air dissolution tank 6 is connected to the inflow line 22 by a supply line 61 and the pressurized water in which the mixed air is dissolved into the inflow line 22 is supplied to the supply line 61, So that the diffuser 7 is configured so as to be ejected into the envelope. That is, when the pressurized water in which the mixed air is dissolved is discharged to the inflow line 22 through the diffuser 7, the pressure is lowered and the pressurized water in which the mixed air is dissolved is discharged to the treatment tank 2 with the micropores.

In the present invention, as shown in FIG. 2 and FIG. 3, an embodiment of the diffuser 7 is shown.

The diffuser 7 shown in FIG. 2 includes a flow pipe 72 communicating with the supply line 61 and flowing pressurized water in which mixed air is dissolved therein, and a flow pipe 72 communicating with the flow pipe 72 The impeller 71 includes a crushing section 71-1 having one side forming an inclined surface and a discharge section 71-2 having an injection nozzle 71-3 formed on the other side, And the rotational force is applied to the impeller 71 while the pressurized water in which the mixed air is dissolved is discharged from the discharge portion 71-2.

That is, the plurality of impellers 71 are configured to radially protrude from the rotary shaft 73 to communicate with the rotary shaft 73 so as to communicate with the flow tube 72 and to be rotatably linked with the rotary shaft 72, The impeller 71 has a crushing section 71-1 and a discharge section 71-2 formed in the same direction so as to discharge the pressurized water from the injection nozzle 71-3 of the discharge section 71-2, The fine bubbles float on the tank 2 and a rotating force is applied to the impeller 71 by the discharge of the pressurized water so that the crushing unit 71-1 crushes solids such as algae, .

Each impeller 71 has a shape in which the diameter of the impeller 71 is narrowed from the direction of the rotating shaft 73 to the direction of the end of the impeller 71. In the course of the flow of pressurized water through the flow tube 72 and the rotating shaft 73 into the impeller 71, The pressure of the impeller 71 is reduced toward the end of the impeller 71, so that the impeller 71 is formed in a shape that the diameter of the impeller 71 is narrowed from the direction of the rotation shaft 73 toward the end, thereby preventing the pressure from being lost during the flow of the pressurized water. That is, the efficiency of microbubbles generation.

3 differs from the diffuser 7 shown in FIG. 2 in that the diffuser 7 of the present embodiment has a plurality of impellers 71, 71-1 are different from each other in that each of the inclined surfaces is formed such that the upward inclination and the downward inclination are alternately formed.

As shown in FIG. 3, the crushing unit 71-1 of the one impeller 71 has a downward slope so as to crush solids such as algae and form an upward flow of water based on the shape of the crushing unit 71-1 The crushing section 71-1 of the impeller 71 forms an upward inclined gradient so as to pulverize the solid matter such as algae and form a downward flow to form a downward flow based on the shape thereof. The reason why the vortex is formed in this way is to prevent the dissolved carbon dioxide dissolved in the pressurized water from lowering the dissolving efficiency as the pressure is released in the discharging process.

5, the pretreatment apparatus 10 may be further provided in the inflow line 22 to remove solids primarily from the raw water, and to remove the solids from the raw water, In the first place.

The pre-treatment apparatus 10 according to the present invention is shown in FIG. 6, wherein a spiral guide is formed on the inner surface of a tube whose upper end is cut off, and a spiral guide is formed thereon, An entrance 300; A hollow fiber membrane assembly 200 configured to surround the raw milk feed inlet 300 in a state where a plurality of hollow fiber membrane unit bodies 100 formed of hollow fiber membranes having a predetermined length are fixed by a pair of upper and lower binding members; A housing 400 in which the hollow fiber membrane assembly 200 is accommodated and the upper and lower ends thereof are cylindrically formed, and a concentrated water outlet 420 for discharging pollutants by washing is formed on one outer circumferential surface; A process water outlet port 520a for discharging process water is formed on the upper side of the housing and a raw water inlet port 520b for supplying raw water to the raw milk inlet 300 is formed on the upper side, And a lower header (500a, b).

First, the hollow fiber membrane unit 100 has a plurality of hollow fiber membranes having a predetermined length, which are not shown in the figure but are filled with an adhesive resin in an upper / lower cap having an opened end, And the hollow fiber membrane unit 100 is formed by curing.

The hollow fiber membrane assembly 200 has a cylindrical shape that surrounds the raw milk inflow inlet 300. In other words, the hollow fiber membrane module assembly 200 is rolled from one end of the hollow fiber membrane assembly 200 to connect the hollow fiber membrane module assembly 200 to the center of the hollow fiber membrane module assembly 200, and adjacent hollow fiber membrane unit bodies 100 are brought into contact with each other.

In the raw milk-feeding inlet 300, a spiral guide is formed on the inner surface of the pipe where the upper end is blocked, and the pierced hole is passed through the spiral guide at a predetermined height. Accordingly, the raw water supplied to the raw milk inflow pipe 300 is vapored through the pores of the upper part while the speed is increased by the helical guide, thereby causing a vortex phenomenon around the discharge.

At this time, the vortex phenomenon acts to knock the hollow fiber membrane unit 100 constituting the hollow fiber membrane assembly 200 and simultaneously perform the water treatment through the hollow fiber membrane unit 100.

The housing 400 is formed into a cylindrical shape having upper and lower ends penetrated to cover and cover the hollow fiber membrane module, and at one side thereof, a concentrated water outlet 420 is formed so as to discharge contaminants generated from raw water . That is, the housing 400 covers the outer surface of the hollow fiber membrane module, and at one lower end thereof, a concentrated water outlet 420 for discharging contaminants and concentrated inflow water separated from the hollow fiber membrane assembly 200 during washing .

The upper and lower inner circumferential surfaces of the housing 400 and the upper and lower outer circumferential surfaces of the housing 400 and the upper and lower ends of the housing 400, respectively, Ring 440 for adhering the ends of the hollow fiber membranes 500a and 500b to each other to prevent the loss of the treated water through the hollow fiber membrane assembly 200. In addition, On the upper / lower outer circumferential surfaces, threads for coupling the upper / lower headers 500a and 500b are formed.

The upper and lower headers 500a and 500b are respectively connected to the upper and lower outer circumferential surfaces of the housing 400 as a funnel shape. At the center of the upper header 500a, the treated water purified by the hollow fiber membrane module is moved upward And a raw water inlet 520b for supplying raw water to the raw milk inlet 300 of the hollow fiber membrane module is formed at the center of the lower header 500b.

At this time, the process water outlet 520a and the raw water inlet 520b are respectively formed with valves to selectively control, shut off or open.

And one or more vibration bars 450, one end of which is fixed to the lower header 500b and the other end is exposed through the hollow fiber membrane assembly 200, are formed. The vibrating bar 450 is made of elastic material so that only one end thereof is fixed. When the vortex is generated in the water treatment process and the washing process, vibration is applied to the vibration bar 450, The vibration is applied to the hollow fiber membrane unit 100 to clean the foreign matter deposited on the surface.

As shown in FIG. 7, the raw milk infusion inlet 300 includes a lower tube 350 having a spiral guide 351 formed therein and a perforation 352 formed through the spiral guide 351 along the spiral guide 351; An upper pipe 360 communicating with the lower pipe 350 by an on-off valve (b) and having a plurality of discharge holes (361) formed at a rim portion of an upper surface thereof; A rotating shaft 370 protruding from a central portion of the upper tube 360; And a frame ring 382 coupled to the upper end of the rotation shaft 370 and connected to the plurality of rotation blades 381 at the positions opposite to the discharge holes 361 and the ends of the plurality of rotation blades 381 A rotation driving unit 380; And a plurality of striking ends 390 protruding from the rotation driving unit 380 and striking the vibration bar 450 in accordance with the rotation of the rotation driving unit 380.

The upper pipe 360 is communicated with the lower pipe 350 by an on-off valve (b), and a plurality of discharge holes 361 are formed in the upper edge of the closed structure. The raw water flowing into the lower pipe 350 flows into the upper pipe 360 and is discharged upward through the discharge hole 361 when the opening / closing valve b is opened (washing process) . When the open / close valve (b) is closed (water treatment process), the raw water is discharged only through the lower pipe (350).

The rotary drive unit 380 is rotatably coupled to the upper end of a rotary shaft 370 protruding from a central portion of the upper tube 360. The rotary drive unit 380 includes a plurality of rotary blades 381 at a position facing the discharge hole 361, And a frame ring 382 connecting the ends of the plurality of rotary blades 381. The raw water discharged through the discharge holes 361 strikes the plurality of rotary blades 381, As shown in Fig.

The striking end 390 protrudes from the rotation driving part 380 and strikes the vibrating bar 450 in accordance with the rotation of the rotation driving part 380. The raw water introduced in the washing step is supplied to the lower pipe 350, The raw water discharged and discharged through the perforation 352 along the helical guide 351 is blown to the hollow fiber membrane unit 100 by the blowing process. In addition, the raw water discharged through the upper pipe 360 The vibrating bar 450 may be struck by a striking end 390 integrally rotating with the rotation driving unit 380 to apply a foreign substance or the like deposited in the filtration process of the hollow fiber membrane unit 100 to the vibrating bar 450 So that the washing process can be performed. It is appropriate that the striking end 390 is made of a soft material.

In the washing process, the opening / closing valve b is opened to allow the lower pipe 350 and the upper pipe 360 to communicate with each other, thereby forming a vortex through the lower pipe 350, and at the same time, So that a rotational force is applied to the rotational driving unit 380. The rotational striking force causes the impacting end 390 to hit the vibrating bar 450 to apply vibration to the vibrating bar 450. [ The vibration applied to the vibrating bar 450 is transmitted to the hollow fiber membrane assembly 200 so that the foreign substances deposited on the hollow fiber membrane unit 100 of the hollow fiber membrane assembly 200 can be easily removed, .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

1: Device 2 of the present invention: Treatment tank
3: floating water storage chamber 4: skimmer
5: Pressure regulating plate 6: Mixed air lysis tank
7: Diffuser

Claims (7)

A treatment tank in which an inflow line through which raw water flows is formed at one lower side and a discharge line through which the treatment liquid is discharged is formed at the other side;
A float storage chamber partitioned at an upper end within the treatment tank;
A skimmer formed at an upper portion of the treatment tank to allow floating matter to flow into the floating matter storage chamber;
A pressure regulating plate projecting from a lower surface of the treatment tank and having an upward slope at a position spaced apart from the inflow line;
A mixed air dissolving tank connected to the inflow line to supply pressurized water in which mixed air of air and carbon dioxide are dissolved to raw water; And
A plurality of hollow fiber membrane unit bodies formed of hollow fiber membranes having a predetermined length and a raw milk inlet formed with a perforation through a spiral guide at an upper portion thereof while a helical guide is formed on an inner surface of the tube with the upper end blocked, The hollow fiber membrane module according to claim 1, wherein the hollow fiber membrane assembly has a shape that surrounds the raw milk feed inlet in a fixed state. The hollow fiber membrane assembly is formed into a cylindrical shape having upper and lower ends penetrated while receiving the hollow fiber membrane assembly. And an upper / lower header formed with a raw water inlet for supplying the raw water through the raw milk inlet, and a lower water tank for supplying the raw water to the upper and lower ends of the housing, , And is configured on the inflow line of the treatment tank to remove solids from the raw water And a pretreatment device for delivering the raw water to the treatment tank,
The pre-
One or more vibrating bars, one end of which is fixed to the lower header and the other end is exposed through the hollow fiber membrane assembly,
The above-
A lower tube having a perforation formed through a spiral guide at an upper portion thereof while a helical guide is formed; An upper tube communicating with the lower tube by an on-off valve and having a plurality of discharge holes formed at a rim of an upper surface thereof; A rotating shaft projecting from a central portion of the upper tube; A rotation driving part coupled to the rotation shaft at a top of the rotation shaft and formed of a frame ring for connecting a plurality of rotation blades to a plurality of rotation blade ends at a position opposite to the discharge hole; And a plurality of striking ends protruding from the rotation driving unit and striking the vibration bar in accordance with rotation of the rotation driving unit.
The method according to claim 1,
Wherein the mixed air dissolving tank is connected to the inflow line by a supply line and the supply line is configured to discharge the pressurized water in which the mixed air is dissolved into the inflow line into the micro- .
3. The method of claim 2,
The diffuser,
A flow pipe communicating with the supply line and flowing pressurized water in which mixed air is dissolved therein; and a plurality of impellers mounted so as to be rotatable and interlocked with the flow pipe, wherein the impeller includes a crushing part And the other end of the impeller is formed with a discharge nozzle having a discharge nozzle, so that the pressurized water in which the mixed air is dissolved is discharged from the discharge unit, so that a rotational force is applied to the impeller.
The method of claim 3,
Wherein each of the pulverizing parts of the impeller has an inclined surface formed with an upward inclination gradient and a downward inclination gradient alternately.
The method according to claim 1,
The pressure regulating plate includes:
Wherein a plurality of body portions are formed between the lower portion of the treatment tank and the inflow line so that a predetermined clearance is formed in a plate shape so that a pressure passage is formed upwardly in the downward direction between the body portions, So that the width of the pressurizing passage is controlled.
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