KR101130816B1 - Flotation tank for rotary injection of nano size bubble - Google Patents

Abstract

The present invention, to improve the floc removal efficiency, to improve the performance of the dissolved air circulating water generator to improve the dissolved air circulating water generator to an ultra-fine bubble generator capable of generating dissolved air circulating water in the form of ultra-fine bubbles In addition, it is to provide a pressurized flotation of a new structure so that the ultra-foam bubbles generated in the ultra-foam bubble generator can contact the floc efficiently, that is to ensure a very large contact area.

As such, the floc removal efficiency is increased by the same compressed air, and the amount of compressed air required to achieve the same floc removal efficiency is significantly reduced.

Description

FOTATION TANK FOR ROTARY INJECTION OF NANO SIZE BUBBLE}

The present invention relates to a pressurized floatation tank, and more particularly, to an ultra-foamed rotary spray pressurized tank for removing flocs by spraying the dissolved air circulating water in the form of ultra-fine bubbles.

Generally, pressurized flotation tanks contain chemicals (alum, etc.) in raw water and stir constantly to form flocs combined with foreign substances remaining in the water, and the floc formed raw water flows into the pressurized flotation tanks in the dissolved air circulating water in the pressurized flotation tank. When combined with the generated bubbles, the floc rises to the upper layer, and the water in the lower layer refers to a water treatment device.

Such a pressurizing relief tank may be roughly classified into a circular pressurization relief tank in which a planar structure forms a circle, and a rectangular pressurization relief tank in which a planar structure forms a rectangle.

In order to remove flocs efficiently in such a pressure flotation tank, more contact area between the floc and the dissolved air circulation water is ensured, and bubbles of the dissolved air circulation water are finer and the distribution density of the bubbles is larger. It is advantageous.

In addition, in order to generate such dissolved air circulating water, a dissolved air circulating water generator in which air is dissolved in a bubble form by mixing circulating water and compressed air is required. The performance and efficiency of the dissolved air circulating water generator are compressed air. The more soluble in the circulating water, and the faster it dissolves, the better.

Rotating vortex type water treatment apparatus using domestic registered utility model No. 20-0396223 "pressurized relief" and domestic registered utility model No. 20-0171311 "dissolved air circulation water generator" And the like, and the present applicant has proposed a Korean Utility Model Registration No. 20-0331708 "Reciprocating floating material removal device of the pressure injured tank". All of the above prior arts are considered to be integrated herein.

On the other hand, Korean Patent Publication No. 10-0871352 "Sewage treatment method and apparatus using nano bubbles" has been proposed as a conventional technology integrated in the present specification.

The present invention is proposed to improve the prior art as described above, in order to improve the floc removal efficiency, to improve the performance of the dissolved air circulating water generator, the dissolved air circulating water generator is used for Improved ultra-foam bubble generator that can generate, and new structure to increase the ultra-foam bubble generated in the ultra-foam bubble generator effectively contact with the floc, that is to secure a very large contact area To provide Joe.

In order to solve the above problems, the present invention, the raw water in which the floc is formed through the raw water inlet pipe, and the auxiliary air flotation tank and the auxiliary to guide the dissolved air circulating water is introduced through the circulating water inlet pipe to float the floc of the raw water A scum removal device provided at an upper portion to remove the flocs induced in the flotation from the flotation tank and including a main flotation tank for discharging the treated water from the raw water through the treated water discharge pipe; A pressurizing pump provided to circulate some of the treated water discharged to the treated water discharge pipe as circulating water; An air compressor for supplying compressed air; In order to generate dissolved air circulating water in which air is dissolved in the form of ultra-fine bubbles by mixing compressed air supplied from the air compressor with circulating water supplied from the pressurized pump, covers are provided on both sides to seal the pressurized air. A tube, a pressurized water circulating water inlet tube provided on one side of the pressurized tube, and circulating water introduced into the pressurized tube, and provided at an inner end of the pressurized tube of the pressurized tube circulating water inlet tube, Vortex forming nozzle formed in the side of the longitudinally long oval nozzle hole, the circulating water outlet pipe provided on the other side of the pressure tube and the dissolved air circulating water flows out of the pressure tube, and one end is located inside the pressure tube And a water level control tube having the other end positioned outside the pressure tube, and the water level tank located outside the pressure tube. Comprising a differential pressure type automatic control valve is provided to adjust the level of the pressure tube in the tube, wherein the inside of the pressure tube, sequentially from the pressure tube circulating water inlet pipe toward the circulating water outlet pipe, A mixing chamber provided with a microbubble feeder for supplying microbubbles to the inside of the pressurized tube by receiving compressed air from the air compressor, a high-speed rotating chamber for reducing the flow path cross-section to induce high-speed rotation of the circulating water, and A turbulent amplification chamber having a flow path cross-sectional area larger than a flow path cross-sectional area is provided, and a collision punching plate having a plurality of through-holes is provided between the high speed rotation chamber and the turbulent amplification chamber, and a flow path cross-sectional area of the turbulent amplification chamber is provided at a rear end of the turbulent amplification chamber. Ultra-fine devices with turbulence amplification chamber exit plates with outlets with smaller flow path area Generator; A circulation water discharge pipe configured to transfer the dissolved air circulating water in the form of ultra fine bubbles supplied from the ultra bubble generator to the circulation water inlet pipe; A circulation water distribution pipe provided horizontally in the auxiliary floating tank to distribute the dissolved air circulation water introduced into the circulation water inlet pipe to the auxiliary floating tank; Injection nozzles provided at intervals along the longitudinal direction of the circulation water distribution pipe and provided to allow the dissolved air circulation water of the circulation water distribution pipe to be injected into the auxiliary floating tank; Rotating plate is rotatably supported in the injection nozzle, the rotary plate having a plurality of rotary blades having an inclined surface is rotatably provided in the flow of the inclined surface of the dissolved air circulation water passing between the rotary blades; A vibrating rubber plate provided inside the injection nozzle and having a notch groove formed at a center thereof so that the dissolved air circulation water passes; A friction plate provided inside the injection nozzle and positioned between the rotary plate and the vibrating rubber plate and having a hollow having a diameter smaller than an inner diameter of the injection nozzle so that the dissolved air circulation water passes; And a control unit.

In the above, the pressurized floatation tank is a circular pressurized floatation tank having a circular planar structure, the circulation water distribution pipe may be arranged in the form of a ring concentric with the auxiliary floatation tank.

In the above, the pressurizing floatation tank is a rectangular pressurization tank having a planar structure having a rectangular shape, the circulation water distribution pipe may be arranged in a horizontal straight form.

In the above, the ultra-fine bubble generator may generate bubbles of 0.1μm to 10μm in diameter.

According to the present invention as described above, a large amount of ultra-fine bubbles are generated from the ultra-fine bubble generator, and the contact area of the ultra-fine bubbles and the floc rotated by the injection nozzle is greatly enlarged as compared to the conventional one, and the floc removal efficiency is very high. It is possible to provide an excellent microbubble rotary injection pressure flotation.

In addition, the present invention is not only achieved in a very fast time, but also bubbles generated while the dissolved air circulating water is sequentially passed through the mixing chamber, high-speed rotary chamber, impact perforated plate, turbulence amplifier chamber inside the ultra-fine bubble generator Becomes a nano-sized microbubble, resulting in very high floc removal efficiency.

Hereinafter, the specific configuration and operation will be described based on embodiments according to the present invention.

Meanwhile, among the terms used in the present invention, raw water means water as a treatment target, such as waste water containing sludge, which is a scum, and floc refers to agglomerated sludge in a lump form by adding a specific chemical to the raw water. it means.

In addition, treated water refers to water that has undergone purification by removing sludge contained in raw water, and dissolved air circulating water refers to water in which dissolved air is mixed with a portion of the treated water, and finally scum is a floc floating on the surface of the water. It means.

Meanwhile, in the present invention, a valve, a motor, an air cylinder, or the like as the driving means may be automatically controlled, and this part may be easily understood without further explanation.

In addition, in the present invention, the pipe does not simply mean a pipe passage such as a pipe, but should be understood as a concept including a pump for inducing a flow of a fluid or a valve for opening or closing a flow of a fluid or adjusting a flow rate of a fluid. Whether or not the various pipes include a pump or a valve can be easily understood through the function of the pipe and can be appropriately applied, so detailed description thereof will be omitted.

Hereinafter, the configuration and operation will be described in detail based on the first embodiment according to the present invention.

1 is a longitudinal cross-sectional conceptual view of a circular pressure injured tank to which the present invention is applied as a first embodiment according to the present invention, and FIG. 2 is a view taken on the basis of AA to show the arrangement of the circulation water distribution pipe in FIG. 1 is a conceptual sectional view of the BB portion of FIG. 1, FIG. 4 is a plan view and a sectional view of the vibration rubber plate of FIG. 3, FIG. 5 is a plan view and a sectional view of the friction plate of FIG. 3, and FIG. 6 is a perspective view of the rotating plate of FIG. 3, FIG. FIG. 7 is a plan view of the rotating plate of FIG. 3, FIG. 8 is a sectional view taken along line CC of FIG. 7, FIG. 9 is a conceptual sectional view of the ultrafine bubble generating apparatus of FIG. 1, FIG. 10 is a DD reference conceptual diagram of FIG. 9, and FIG. 9 is a conceptual diagram of the EE reference.

As shown, the pressure injured tank 100 of the first embodiment of the present invention, the auxiliary floating tank 110, the main floating tank 120, scum removal device 121 and the like.

The auxiliary flotation tank 110 has a circular shape, and is supplied with raw air having floc and dissolved air circulating water including dissolved air generating bubbles, and floating flocs by using the bubbles of the dissolved air circulating water. It is a device to separate the treated water.

The auxiliary floating tank 110 is connected to the raw water inlet pipe 111. At this time, the outlet of the raw water inlet pipe 111 is preferably formed to be inclined at a predetermined angle so that the incoming raw water rises causing the vortex in the auxiliary floating tank 110.

The auxiliary floating tank 110 is connected to the circulation water inlet pipe 112. The circulating water inlet pipe 112 introduces the dissolved air circulating water containing the dissolved air into the auxiliary floating tank 110. The dissolved air circulating water discharged to the auxiliary flotation tank 110 is dissolved air circulation water in which air is dissolved in the form of ultra-fine bubbles, and the ultra-fine bubble is the auxiliary flotation tank 110 through the above-described raw water inlet pipe 111. They stick to the flocs formed in the raw water, which causes them to float on the surface.

In this case, the contact efficiency of the flock and the bubble is advantageous as the diameter of the bubble is smaller, and the pressure riser of the present invention is very fine bubbles having a very fine diameter of the bubble, so that the contact efficiency of the flock and the bubble is very high.

The upper end of the circulating water inlet pipe 112 is installed in a circular ring-shaped circulation water distribution pipe 113 is connected horizontally, a plurality of downwards at intervals along the longitudinal direction of the circulating water distribution pipe 113 Injection nozzles 114 are disposed. Therefore, the circulation water distribution pipe 113 injects the dissolved air circulating water below the auxiliary flotation 110 through the injection nozzle 114 in a state located above the auxiliary flotation 110, and thus the auxiliary flotation 110. The floc of the raw water supplied to) collides with the bubbles of the circulating water and is easily floated to the upper part of the main flotation tank 120, and the treated water from which the floc is separated is left under the main flotation tank 120.

In the center of the auxiliary floating tank 110, the scum outflow pipe 115 is installed in the vertical direction. The scum outflow pipe 115 discharges the scum filtered through the scum removal device 121 to the outside. Scum outflow pipe 115 has an upper portion of the funnel shape.

The main flotation 120 has a circular shape surrounding the auxiliary flotation 110, and receives the floc and the treated water separated from the auxiliary flotation 110. The floc supplied to the main flotation 120 is floated to the upper portion of the main flotation 120 through the bubble.

The scum removing device 121 is installed on one side upper side of the main flotation tank 120 and scum that is lifted to the upper portion of the main flotation tank 120, that is, the scum that is installed at the center of the auxiliary flotation 110 by filtering scum. It is discharged to the outlet pipe 115. Scum removal device 121 is preferably provided to rotate along the circumferential surface of the main floating tank (120).

The treatment water discharge pipe 122 is connected to the lower portion of the main flotation tank 120, and the treatment water is discharged to the outside through the treatment water discharge pipe 122.

In addition, the bottom surface of the main flotation tank 120 is heavy, the secondary floc discharge pipe 123 for removing flocs that are not injured by air bubbles but sinks below the water surface is connected.

Meanwhile, a separate branch pipe 210 is connected to the treated water discharge pipe 122, and a pressure pump 220 is provided at an end of the branch pipe 210.

The pressure pump 220 pumps a portion of the treated water discharged to the treated water discharge pipe 122 and sends the circulating water to the ultra-fine bubble generator 240 described later. The water to be pumped out of the treated water above and below is referred to as circulating water.

In addition, the ultra-fine bubble generator 240 mixes the compressed air supplied from the air compressor 230 to the circulating water to generate the dissolved air circulating water in which the air is dissolved in the form of ultra-fine bubbles.

Circulating water discharge pipe 250 is connected to the other end of the ultra-fine bubble generator 240, circulating water inlet pipe 112 is connected via the circulating water discharge pipe 250, the dissolved air circulating water is an auxiliary flotation tank ( 110).

In addition, the circulating water discharge pipe 250 is provided with a friction valve 260, the dissolved air circulating water is broken more finely in the process of passing through the friction valve 260 to generate a large amount of bubbles having a small diameter, In this state, it is introduced into the circulation water inlet pipe (112).

The structure of the ultra-fine bubble generator 240 will be described with reference to FIGS. 9 to 11.

The cover tubes 242 and 243 are coupled to both sides of the pipe-type pressure tube 241 by bolts to seal the pressure tube 241.

A pressurized tube circulating water inlet tube 244 is provided on the upper one side of the pressurized tube 241, and the pressurized tube circulating water inlet 244 is pressurized by the pressurized pump 220. The circulating water is taken into the pressurized tube 241.

A vortex forming nozzle 245 is provided at the inner end of the pressurizing tube 241 of the pressurizing tube circulating water inlet tube 244.

An elliptical nozzle hole 245a is formed on the side surface of the vortex forming nozzle 245.

The nozzle hole 245a has an ellipse shape long formed in the longitudinal direction of the pressure tube 241.

Due to the vortex forming nozzle 245, the circulating water is sprayed along the inner circumferential surface of the pressure tube 241 to form a vortex inside the pressure tube 241.

In addition, the other side of the upper portion of the pressure tube 241 is provided with a circulating water outlet pipe 246 for discharging the dissolved air circulating water dissolved in the air in the form of ultra-fine bubbles.

The inside of the pressurizing tube 241 having such a structure is the mixing chamber 241-1 and the high speed rotating chamber 241 sequentially from the pressurizing tube circulating water inlet tube 244 toward the circulating water outlet tube 246. -2), turbulence amplification chamber (241-3), it can be divided into a level control chamber (241-4).

The microbubble feeder 247 is built in both side walls of the mixing chamber 241-1 in the pressurizing tube 241.

The microbubble feeder 247 discharges the compressed air in the form of bubbles into the circulation water of the pressure tube 241 through the porous plate 247a having a myriad of small holes.

In addition, the outer surface (surface toward the center of the pressure tube 241) of the porous plate 247a of the microbubble feeder 247 forms a guide passage through which the circulation water can flow.

The microbubble feeder 247 is a compressed air supply pipe 247b is exposed to the outside of the pressure tube 241 to be connected to the outside, it is possible to receive the compressed air from the air compressor (230).

The microbubble feeder 247 is provided in one or more places according to the length of the pressure tube 241, serves as a guide passage for the circulating water, the compressed air supplied through the compressed air supply pipe 247b and the porous plate ( The compressed air in the form of bubbles is supplied to the circulating water through 247a, and the air is dissolved while the microbubble is mixed with the circulating water flowing in the vortex form along the porous plate 247a.

The circulating water in which air in the form of fine bubbles is mixed and dissolved is introduced into the high speed rotation chamber 241-2 through the mixing chamber 241-1.

Since the high speed rotation chamber 241-2 has a flow path cross-sectional area smaller than that of the mixing chamber 241-1, high speed rotation of the circulating water is induced.

The circulating water guided by the high speed rotation thus meets the collision porous plate 241-5 provided at the rear end of the high speed rotation chamber 241-2.

A plurality of through holes 241-5a are formed in the collision porous plate 241-5.

Therefore, the circulating water in which the air in the form of fine bubbles is mixed and dissolved is promoted to dissolve the fine bubbles by high-speed rotation, and some of the circulating water collides with the collision porous plate 241-5, while some of the circulating water It passes through the through hole 241-5a of the collision porous plate 241-5 and flows into the turbulence amplifier chamber 241-3.

At this time, the circulating water passing through the through hole 241-5a further increases the flow rate to promote dissolution of the fine bubbles.

In addition, the turbulence amplification chamber 241-3 has a flow path cross-sectional area larger than that of the high speed rotation chamber 241-2, and a flow path of the turbulence amplification chamber 241-3 is located at the rear end of the turbulence amplification chamber 241-3. A turbulent amplification chamber outlet plate 241-6 having an outlet 241-6a having a flow path cross-sectional area smaller than the cross-sectional area is provided.

The circulating water introduced into the turbulent amplification chamber 241-3 is a turbulent amplification due to the turbulent amplification chamber 241-3 having an expanded diameter, so that the bubbles are dissolved more finely and ultra-small bubbles having a diameter of 0.1 μm to 10 μm Dissolves in size.

As such, the circulating water in which air is dissolved in the form of ultra-fine bubbles in the turbulent amplification chamber 241-3 flows into the level control chamber 241-4 where the end of the circulating water outlet pipe 246 is located.

A pressure gauge 248 is installed on the cover 243 on the side of the circulating water inlet pipe 244 to supply compressed air at a pressure suitable for the inlet circulating water, and a water level control tube 249 is provided on the opposite cover 242. ) Is connected to the inside of the pressure tube (241).

The water level control pipe 249 located outside the pressure tube 241 includes a safety valve 249a for preventing an abnormal increase in the pressure inside the pressure tube 241, and a water level control and air inside the pressure tube 241. A differential pressure automatic control valve 249b for discharging is provided.

In addition, the bottom of the pressure tube 241 is provided with a drain pipe (241a) to discharge the circulating water remaining inside when the machine stops operating.

The ultra-foam bubble generating device 240 is an elliptical nozzle hole of the vortex forming nozzle 245 of the circulating water circulating water inlet tube 244 of the pressurized tube, part of the treated water treated in the main flotation tank 120 When introduced into the pressure tube 241 through the 245a, the vortex flows inside the pressure tube 241 by the inflow direction by the nozzle hole 245a. At this time, the elliptical nozzle hole 245a is long in the longitudinal direction of the pressurizing tube 241 and is ejected along the main surface of the pressurizing tube 241 in the direction away from the center of the pressurizing tube 241, so that the friction loss is small. In addition, it is possible to obtain a fast rotational speed to enable fast air dissolution in a short time.

The pressure gauge 248 checks the circulating water pressure inside the pressure tube 241 to supply an appropriate amount of compressed air to the microbubble feeder 247 provided with the porous plate 247a, and the microbubble feeder 247. In the air supply, fine bubbles are supplied to the circulating water vortex-moving through the porous plate 247a in which small holes are formed. The circulating water dissolves the bubbles by continuing the vortex movement along the mixing chamber 241-1 in a state including the supplied bubbles. In the high-speed rotary chamber 241-2, the dissolution of the bubbles is promoted due to the faster rotation speed. In addition, the melting of the bubbles is further promoted while passing through the collision with the collision porous plate 241-5 and the through hole 241-5a formed in the collision porous plate 241-5 at a very high speed. As a result, the turbulence of the circulating water is further increased in the turbulent amplification chamber 241-3 so that the bubbles are dissolved in the circulating water in the form of ultra-fine bubbles.

Since the circulating water in which air is dissolved in the form of ultra-fine bubbles flows into the water level control room 241-4, and then the friction valve 260, the circulating water inlet tube 112, and the circulating water through the circulating water outlet pipe 246. The pipe 113 is supplied to the auxiliary floating tank 110.

In addition, the differential pressure automatic control valve (249b) is provided for the purpose of performing the water level control and gas discharge of the level control room (240d) of the pressure tube 241 by using the difference between the external atmospheric pressure and the internal pressure. That is, when the pressure of the compressed air flowing into the pressurized tube 241 is set slightly higher than the pressure of the circulating water to supply the compressed air, the water level drops to the lower end of the level control pipe 249, and at this time, a part of the compressed air Is discharged to the outside through the water level control pipe 249 and the differential pressure automatic control valve (249b), the pressure of the compressed air inside the pressure tube 241 is lowered momentarily.

As such, when the pressure of the air decreases momentarily and the pressure of the circulating water becomes relatively high, as the water level rises, the tip of the water level control pipe 249 is positioned below the level of the circulating water, whereby the differential pressure automatic control valve 249b is provided. Is blocked, and the air pressure becomes high again.

As such, the air discharge due to the air pressure, the water level increase due to the air discharge, and the air pressure increase due to the water level increase are repeated, thereby automatically adjusting the water level inside the pressure tube 241.

In addition, if the opening degree of the differential pressure automatic control valve (249b) is adjusted, such a water level adjustment cycle can be lengthened and stable operation is possible.

As such, when the bubbles are dissolved in the ultra-fine bubble generator 240 to generate dissolved air circulating water dissolved in the form of ultra-fine bubbles, the bubbles are split into smaller bubbles in the process of passing the dissolved air circulating water through the friction valve 260. It is dissolved in the dissolved air circulating water, and in this state, it is introduced into the circulating water distribution pipe 113 through the circulating water inlet pipe 112.

Dissolved air circulating water introduced into the circulation water distribution pipe 113 is injected through the injection nozzle 114 and supplies a large amount of ultra-fine bubbles in the auxiliary floating tank 110 to the raw water introduced into the auxiliary floating tank 110. Flocculated flocs can be floated more efficiently.

The structure of the injection nozzle 114 will be described in more detail with reference to FIGS. 3 to 8.

The injection nozzle 114 is provided with a vibrating rubber plate 114a, a friction plate 114b, and a rotating plate 114c in this order along the moving direction of the fluid.

The vibration rubber plate 114a is formed at the center thereof with a notch groove 114a-1 having a “+” shape. Although the notch groove 114a-1 is shown as having a relatively large width in the drawing, it is sufficient to have a very small width so as to leave a cut with a "+" shaped blade on the vibrating rubber plate 114a.

In the center of the friction plate 114b, a hollow 114b-1 having a diameter smaller than the inner diameter of the injection nozzle 114 is formed.

The rotary plate 114c has a plurality of rotary blades 114c-1 protruding radially from the center portion thereof, and each of the rotary blades 114c-1 has inclined surfaces 114c-2 in the same shape. In addition, the rotating plate 114c is rotatably supported by the injection nozzle 114.

That is, the rotary plate 114c is in a state in which the rotary blades 114c-1 are loosely supported so as not to be fixed to the injection nozzle 114, thereby being able to rotate.

Therefore, the dissolved air circulating water, which is split more finely and passes through the friction valve 260 and amplified the bubble water, is generated while passing through the notch groove 114a of the vibrating rubber plate 114a and the hollow 114b-1 of the friction plate 114b. More bubbles may be generated due to the increase in the flow rate and the pressure drop of the hollow 114b-1 and the tremor of the cutout groove 114a.

The dissolved air circulating water containing a large amount of ultra-fine bubbles generated in this way is applied to the inclined surface (114c-2) of the rotary blade (114c) while passing between the rotary blade (114c-1) of the rotary plate (114c) and Thus, the rotary blade 114c is rotated in place to form a vortex in the dissolved air circulation.

Therefore, the dissolved air circulation water injected from the injection nozzle 114 has a very high distribution density and contains a large amount of bubbles in the form of ultra fine bubbles having a very fine diameter.

In addition, since the dissolved air circulating water injected from the injection nozzle 114 forms a vortex, it is diffused from the injection nozzle 114 and can be diffused to a larger area.

As a result, the raw water introduced into the auxiliary flotation 110 encounters bubbles in the form of ultra-fine bubbles over a larger area and with a higher distribution density, so that flocs aggregated in the raw water can be efficiently floated.

As described above, the fact that the floc can be efficiently removed by the same compressed air also means that the amount of compressed air required can be drastically reduced as compared with the conventional one in order to enable floc removal having the same performance as the conventional one.

Hereinafter, a second embodiment according to the present invention will be described.

FIG. 12 is a vertical cross-sectional conceptual view of a rectangular pressurization tank to which the present invention is applied as a second embodiment according to the present invention, and FIG. 13 is a conceptual view of an FF reference plane for showing the arrangement of the circulation water distribution pipe in FIG. 13 is a view for showing the shape of the circulation water distribution pipe viewed from the GG reference.

Since the present embodiment is a rectangular pressure injured tank, the main floating tank 120 is continuously installed at the rear end of the auxiliary floating tank 110 of the rectangular shape similar to the conventional pressurized injured tank. Therefore, the flow of raw water may be defined as a linear flow from the auxiliary flotation 110 to the main flotation 120. In this regard, the circular pressing flotation tank has a continuous main flotation tank 120 radially in the central auxiliary flotation tank 110, and the flow of raw water may be defined as a flow in the radial direction.

In addition, the scum removing device 121 is to remove the float while reciprocating a predetermined section, the scum collection tank 140 is provided at the rear end of the scum removing device 121.

Since the structure of the pressurized inlet of the rectangular shape is very general, detailed description thereof will be omitted. However, since the same reference numerals are assigned to components that perform the same functions as the first embodiment, the structure and function of the present embodiment may be easily understood.

Of course, in this embodiment, the structure of the ultra-fine bubble generator 240 is the same as the first embodiment.

In this embodiment, however, since the auxiliary floating tank 110 has a rectangular structure, the circulation water distribution pipe 113 is disposed in a horizontal straight line, and the injection nozzle 114 injects the dissolved air circulating water toward the top. do.

Such a present invention can be used not only for water purification systems, but also for wastewater to sewage treatment systems.

The above embodiments are merely preferred embodiments of the present invention, and the technical idea of the present invention may be variously modified or adjusted by those skilled in the art. Such modifications and adjustments fall within the scope of the present invention if they use the technical idea of the present invention.

The present invention can be used as a pressure flotation tank for removing the flocs by rotationally spraying the dissolved air circulation water dissolved in the circulation water in the form of ultra-fine bubbles to the raw water.

1 is a longitudinal cross-sectional conceptual view of a circular pressure injured tank to which the present invention is applied as a first embodiment according to the present invention;

FIG. 2 is a view viewed on the basis of A-A to show the arrangement of the circulation water distribution pipe in FIG. 1;

3 is a conceptual cross-sectional view of the B-B portion of FIG.

4 is a plan view and a cross-sectional view of the vibration rubber plate of FIG.

5 is a plan view and a cross-sectional view of the friction plate of FIG.

6 is a perspective view of the rotating plate of FIG.

7 is a plan view of the rotating plate of FIG.

8 is a cross-sectional view taken along line C-C of FIG.

9 is a conceptual cross-sectional view of the dissolved air circulation water generator of FIG.

FIG. 10 is a D-D reference conceptual diagram of FIG. 9;

11 is an E-E reference conceptual diagram of FIG. 9;

12 is a longitudinal cross-sectional conceptual view of a rectangular pressure relief tank to which the present invention is applied as a second embodiment according to the present invention;

FIG. 13 is a conceptual diagram of an F-F reference plane for showing the arrangement of the circulation water distribution pipe in FIG. 12;

14 is a view showing the shape of the circulation water distribution pipe viewed from the G-G reference in FIG.

<Description of Symbols for Main Parts of Drawings>

110: auxiliary floating tank 111: raw water inlet pipe

112: circulating water inlet pipe 113: circulating water distribution pipe

114: injection nozzle 114a: vibrating rubber plate

114b: friction plate 114c: rotating plate

115: scum outflow pipe

120: main flotation 121: scum removing device

122: treated water discharge pipe 123: auxiliary floc discharge pipe

140: Scum collection tank

210: branch pipe 220: pressurized pump

230: air compressor 240: ultra-fine bubble generator

241: pressure tube 241-1: mixing chamber

241-2: High speed rotation chamber 241-3: Turbulent amplification chamber

241-4: Level control room 241-5: Perforated plate for collision

241-6: Exit plate in turbulent amplification

242, 243: cover 244: circulating water inlet pipe

245: Vortex forming nozzle 245a: nozzle hole

246: circulating water outlet pipe 247: fine bubble supply

248: pressure gauge 249: level control pipe

249b: Differential Pressure Automatic Control Valve

250: circulating water discharge pipe 260: friction valve

Claims (4)

To remove the floe induced in the flotation and the secondary flotation tank to induce the floc of the raw water is introduced through the raw water inlet pipe and the dissolved air circulating water flows through the circulating water inlet pipe A scum removal device for providing a scum removal device and including a main floating tank for discharging the treated water from which the floc has been removed from the raw water through the treated water discharge pipe; A pressurizing pump provided to circulate some of the treated water discharged to the treated water discharge pipe as circulating water; An air compressor for supplying compressed air; In order to generate dissolved air circulating water in which air is dissolved in the form of ultra fine bubbles by mixing compressed air supplied from the air compressor with circulating water supplied from the pressure pump, Covered pressurized tube is provided on both sides, the pressurized tube circulating water inlet tube provided on one side of the pressurized tube circulating water flows into the pressurized tube, and the inner end of the pressurized tube of the pressurized tube circulating water inlet tube A vortex forming nozzle provided at a side of an elliptical nozzle hole long in the longitudinal direction of the pressurizing tube, and a circulating water outlet pipe provided at the other side of the pressurizing tube to allow dissolved air circulating water to flow out of the pressurizing tube; One end is positioned inside the tube and the other end is located on the outside of the pressure tube, and the differential pressure type is provided to adjust the level of the pressure tube in the water level control tube located outside the pressure tube. Including control valve, The pressurized tube is provided with a microbubble feeder that receives compressed air from the air compressor sequentially from the pressurized tube circulating water inlet tube to the circulating water outlet tube and supplies microbubbles to the inside of the pressurized tube. And a turbulent amplification chamber having a flow path cross-sectional area larger than that of the flow path cross section of the high speed rotation chamber, wherein the flow path cross-sectional area is reduced to induce high speed rotation of the circulating water. Between the high-speed rotation chamber and the turbulence amplifier chamber is provided a collision punched plate formed with a plurality of through holes, the turbulent amplifier chamber exit plate formed at the rear end of the turbulent amplifier chamber has an outlet having a flow path cross-sectional area smaller than the flow passage cross-sectional area of the turbulent amplifier chamber; Ultra-fine bubble generator provided; A circulation water discharge pipe configured to transfer the dissolved air circulating water in the form of ultra fine bubbles supplied from the ultra bubble generator to the circulation water inlet pipe; A circulation water distribution pipe provided horizontally in the auxiliary floating tank to distribute the dissolved air circulation water introduced into the circulation water inlet pipe to the auxiliary floating tank; An injection nozzle provided at intervals along a length direction of the circulation water distribution pipe and provided to allow the dissolved air circulation water of the circulation water distribution pipe to be injected into the auxiliary floating tank; Rotating plate is rotatably supported in the injection nozzle, the rotary plate having a plurality of rotary blades having an inclined surface is rotatably provided in the flow of the inclined surface of the dissolved air circulation water passing between the rotary blades; A vibrating rubber plate provided inside the injection nozzle and having a notch groove formed at a center thereof so that the dissolved air circulation water passes; A friction plate provided inside the injection nozzle and positioned between the rotary plate and the vibrating rubber plate and having a hollow having a diameter smaller than an inner diameter of the injection nozzle so that the dissolved air circulation water passes; Ultra-bubble rotary injection pressurizing buoy characterized in that it comprises a. The method of claim 1, The pressing levitation is a circular pressing levitation forming a planar structure circular, The circulation water distribution pipe is ultra-bubble rotary injection pressure floating tank characterized in that it is disposed in the form of a ring concentric with the auxiliary floating tank. The method of claim 1, The pressurized floating tank is a rectangular pressurized tank having a planar structure having a rectangular shape, and the circulation water distribution pipe is arranged in a horizontal straight line. The method according to any one of claims 1 to 3, The ultra-bubble bubble generator is a ultra-bubble rotary injection pressure flotation characterized in that for generating bubbles of 0.1μm to 10μm in diameter.

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