KR20200090430A - Dissolved air floatation apparatus using vortex - Google Patents

Abstract

The present invention relates to a dissolved air floatation apparatus using a swirling flow, which can prevent the occurrence of drift by generating a constant swirling flow inside a dissolved air flotation tank, thereby improving the contact rate between microbubbles and floating materials and the floating rate of the floating materials combined with the microbubbles. The dissolved air floatation apparatus has a body formed therein with a cylindrical inner space. Fluid flows from the outside to form a swirling flow, so that microbubbles combined with floating materials float. The fluid from which the floating materials have been removed is discharged through a center portion of the apparatus and a lower portion of the apparatus has a structure in the form of a hopper through which precipitated sludge is collected and discharged.

Description

Pressurized flotation device using swirl flow {DISSOLVED AIR FLOATATION APPARATUS USING VORTEX}

The present invention relates to a pressurized levitation device using a swirl flow, and more specifically, by attaching a small bubble to the foreign matter contained in the fluid using a method to float to the limit surface where the fluid and air are in contact with the foreign matter in the fluid. In a pressurized levitation device for separating and removing, the present invention relates to a pressurized levitation device capable of improving separation and removal efficiency of foreign substances in a fluid by preventing generation of drift in the pressurized levitation device.

In general, the treatment method for removing contaminants in a fluid such as sewage or wastewater is most widely used a sedimentation method that precipitates contaminants. Such a sedimentation method requires a relatively large treatment time of 2 to 4 hours, Algae, oil, grease, synthetic detergents, iron and magnesium, such as low-density particles did not settle and floated to the treated water area.

On the other hand, the dissolved air pressurized flotation method has a treatment time of less than 30 minutes, which is much shorter than the conventional precipitation method, and has an excellent effect on removal of low-density particles. Due to its advantages, it has recently been applied to water treatment facilities.

The pressurized flotation method is commonly used as a method for removing contaminants from fluids such as sewage or wastewater. When there are many lighter floating substances (oil, grease, suspended solids, etc.) than water, instead of sinking the floating substances, It is a wastewater purification method that is used to remove the water by making it float.

The principle of the pressurized levitation method dissolves air in a fluid to be treated under pressure and opens it in atmospheric pressure, whereby the air dissolved in the fluid turns into a number of microbubbles, and these microbubbles attach around the suspended matter in the fluid. This is a method of reducing the specific gravity of suspended solids so that suspended solids float on the fluid.

However, in the conventional pressurized levitation device, while drift is generated inside the reaction tank by the fluid supplied into the floating tank, the micro bubbles are not evenly distributed and rise, while the overall floating separation effect is reduced while contacting only the suspended matter in a certain area in the fluid. In addition, there was a problem that the floating sludge combined with micro bubbles and bubbles did not rise from the floating tank and passed to the treated water section.

Thus, the present invention prevents the drift from occurring inside the pressurized float tank so that the separation of the whole evenly occurs, and prevents the floating sludge with bubbles or bubbles from being normally injured and does not fall into the separated section of the treated water. As a result, it is intended to present a technique for a new pressurized levitation device that can improve the effect of separating suspended substances in a fluid.

Next, the prior art existing in the field to which the technology of the present invention pertains will be briefly described, and then the technical matters to be differentiated from the prior art will be described.

First, the registered patent publication No. 10-1602289 (Announcement date of March 21, 2016) relates to a pressurized flotation device using a reverse vortex type microbubble generator, and more specifically, generates and generates microbubbles through various processes. A pressurized levitation facility using a reverse vortex type micro bubble generator that can more easily remove suspended substances contained in raw water by evenly discharging the sludge to prevent coarse bubbles from being evenly sprayed. Technology is described. In the prior art document registration patent publication No. 10-1602289, as a technique for preventing drift in the floating tank, only a technique is proposed to allow raw water to flow out of the entire width of the floating tank. This does not include a technique to prevent drift and to improve the contact ratio of bubbles and suspended solids by swirling flow.

In addition, Registered Patent Publication No. 10-1639414 (published on January 14, 2015) is equipped with a swivel type separation tank, and the treated water recovery pipe and the recovered pipe of the injured scum are concentric with respect to the center line of swirl flow in the floating separation tank. Described is a technique related to a pressurized flotation device capable of simultaneously separating sedimentary suspended matter and floating suspended matter in raw water by arranging upward and forming a descending water stream together with the rising water flow in the floating separation tank. The prior art document registration patent publication No. 10-1639414 has some similarities to the present invention in that it is a technology related to a pressurized flotation device using swirl flow, but unlike the present invention, a problem that does not prevent drift occurring in swirl flow There was.

In addition, Patent Publication No. 10-2018-0100004 (2018.09.06. publication date) relates to a circular pressurized floating device, more specifically, the contact tank is configured to have an accommodating space in an annular shape, and wastewater and fine bubble water By injecting the mixed water of the tangentially into the receiving space, and configuring the wastewater to flow from the wide circumference to the central part, the wastewater injected into the contact tank and the microbubble water rotate in a space free of contaminants. A technique for a pressurized levitation device that maximizes contact of microbubbles is described. The prior art publication No. 10-2018-0100004 has some similarities to the present invention in that it generates swirl flow by supplying wastewater in a tangential direction to the inside of a cylindrical contact tank). Thus, while the separation tank, which is a space for raising suspended solids to the water, is installed in the central portion of the entire pressurized flotation device, the present invention has a structure in which the floating tank is installed at the edge of the device and the treated water is discharged by moving to the central part through the bottom of the floating tank. On the other hand, in the prior art literature, wastewater supplied between the central portion and the outer portion of the contact tank initially through the first and second inner walls is sequentially moved to the central portion and the outer portion of the contacting tank, and contaminated water is discharged to the upper portion of the center of the contacting tank. And, the treated water has a structure to be discharged to the upper portion of the outer contact tank. In the contact tank structure of the prior art document, there was a problem that the micro-bubbles and the floating sludge combined with the air bubbles could not be completely prevented from passing into the treated water section.

The present invention was created to solve the above problems, to prevent the occurrence of drift by generating a constant vortex flow inside the floating separation tank, and to prevent the micro-bubbles, etc. from going to the section of the treated water separated by floating An object of the present invention is to provide a technique for a pressurized levitation device using a swirling flow that can improve the processing efficiency of suspended solids.

Pressurized flotation device using a swirl flow according to an embodiment of the present invention, a space formed between the outer wall of the cylinder and the inner wall of the cylinder having an outer diameter smaller than the inner diameter of the outer wall, the lower wall is open, the outer wall and On the basis of the cross-section of the space between the inner walls, a fluid inflow pipe through which the fluid flows in a clockwise or counterclockwise direction and a micro-bubble injection pipe through which micro bubbles are injected are provided. As the sludge outlet is formed, a swirling flow is generated while the inflowing fluid and the micro-bubbles rotate along the space between the outer and inner walls, and the micro-bubble is combined with the sludge in the fluid to float and discharge; A floating sludge collection pipe formed on an upper portion of the cylindrical outer wall and including a floating sludge outlet through which the sludge floating in the floating separation unit is discharged; A floating sludge scraper which is provided on the floating separation unit and rotates around the center of the floating separation unit to induce floating sludge to be discharged through the floating sludge collection pipe to the floating sludge outlet; As the space formed inside the inner wall of the cylindrical, the floating water is floating fluid in the floating separation unit is introduced through the lower surface of the inner wall of the inner wall, the treated water induction pipe rises along the inner space of the cylindrical inner wall; A treated water discharge pipe formed in a pipe shape extending from the treated water induction pipe to the outside of the outer wall, and a fluid rising along the inside of the treated water induction pipe is discharged; And a sedimentation sludge discharge unit having a sedimentation sludge outlet for discharging sludge in the fluid sedimented from the floating separation unit as a hopper-shaped space extending along the lower portion of the outer wall.

In addition, as an embodiment, the floating separator has an outer diameter smaller than the inner diameter of the outer wall, an inner diameter larger than the outer diameter of the inner wall, and a vortex prevention device having a cylindrical shape in which the upper and lower surfaces are open. It is characterized in that at least one is formed at a lower height than the fluid inlet pipe and the microbubble injection pipe.

In addition, as an embodiment, the fluid inlet pipe is formed in a pipe shape extending in a horizontal direction from the outside of the outer wall of the floating separation part toward the inner wall, clockwise based on a cross section of the space between the outer wall and the inner wall Or a fluid distribution pipe through which fluid is discharged in a counterclockwise direction.

In addition, as an embodiment, the micro-bubble injection tube is formed in the form of a pipe extending in a horizontal direction from the outside of the outer wall of the floating separator toward the inner wall, based on the cross section of the space between the outer wall and the inner wall It characterized in that it comprises at least one or more; micro-bubble distribution pipe is discharged micro-bubbles in the direction or counterclockwise.

In addition, in one embodiment, the fluid distribution pipe, when the vertical upper direction of the floating separation portion is 0 degrees, by having at least 0 degrees and 90 degrees or less of an angle formed on the outer wall of the fluid inlet pipe, in the fluid It is characterized in that the floating material is prevented from entering the treated water induction pipe.

In addition, as an embodiment, the micro-bubble distribution pipe, when the vertical upper direction of the floating separation portion is 0 degrees, by having at least 0 degrees and 90 degrees or less angles are formed on one or more outer walls of the micro-bubble injection pipe, It is characterized in that to prevent the micro-bubbles in the fluid from flowing into the treated water induction pipe.

In addition, as an embodiment, in order to prevent the sludge precipitated in the floating separation unit from being attached to the lower surface of the sedimentation sludge discharge unit and hardened, a sedimentation sludge scraper is provided on the lower surface of the sedimentation sludge discharge unit. The sludge scraper is characterized by rotating by receiving power from a speed reducer by a rotation shaft formed along the center of the treated water induction pipe.

The present invention is a pressurized floating device for separating and removing suspended matter from a fluid using a method of attaching and floating micro-bubbles to suspended matter contained in a fluid, the fluid is always inside the floating separation section in which the internal space is cylindrical. By maintaining a constant swirl flow, there is an effect that can block the generation of drift generated in a specific portion to improve the floating separation efficiency of suspended matter in the fluid.

In addition, according to the present invention, when the fluid in the floating separation unit flows, the fluid distribution pipe is used to lower the injection speed of the fluid, and by allowing the micro bubbles to flow toward the upper direction of the floating separation unit, floating substances and micro bubbles in the fluid are removed. There is an effect that can be prevented from entering the treated water induction pipe through the lower portion of the floating separation.

1 is a view schematically showing the structure of a pressurized levitation device using a swirling flow and the movement of a fluid according to an embodiment of the present invention.
2A is a perspective view of a perspective view of a pressurized levitation device using swirl flow according to an embodiment of the present invention.
Figure 2b is a perspective view of the treated water induction pipe and the treated water discharge pipe according to an embodiment of the present invention.
Figure 3a is a cross-sectional view of a pressure flotation device using a swirl flow according to an embodiment of the present invention.
Figure 3b is a cross-sectional view showing the movement of the fluid in the pressure flotation device using a swirl flow according to an embodiment of the present invention.
4 is a transmittance of a plan view of a pressure-levitation device using a swirl flow according to an embodiment of the present invention.
5 is a cross-sectional view of a fluid inlet pipe and a microbubble injection pipe according to an embodiment of the present invention.
6 is a perspective view of a fluid inlet pipe and a microbubble injection pipe according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the pressure injured device using a swirl flow so that those of ordinary skill in the art to easily implement the present invention.

In each drawing of the present invention, the size or dimensions of the structures are enlarged or reduced than actual ones for clarity of the present invention, and well-known components are omitted and shown to reveal characteristic features, and thus are not limited to the drawings. .

In the detailed description of the principles of the preferred embodiment of the present invention, when it is determined that detailed descriptions of related well-known functions or configurations may unnecessarily obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

In addition, the embodiments shown in the embodiments and drawings described in this specification are only the most preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, and can replace them at the time of this application. It should be understood that there may be equivalents and variations.

The present invention does not evenly disperse the microbubbles due to various drift (channeling) phenomena occurring inside the pressurized levitation device, and rises only to some areas, so that the floating separation of suspended solids in the fluid is not achieved, and the floating separation effect is reduced. In addition, the present invention relates to a pressurized flotation device using a swirling flow to solve a problem in which a suspended substance combined with micro-bubbles and bubbles does not rise in the floating separation section and passes to the treated water section.

To this end, the present invention prevents the occurrence of drift by generating a swirling flow of fluid inside the pressurized flotation device, and improves the contact rate of the microbubbles and suspended solids and the floating efficiency of the suspended solids combined with the microbubbles. Particularly, the drift is a problem in the floating separation portion, so that the floating flow of the fluid is stably maintained by placing the floating separation portion at the edge of the pressurized floating device.

That is, the present invention generates a swirling flow in the fluid in the floating separation unit so that no drift occurs in the floating separation unit in the pressurized flotation device, and the occurrence of drift due to reducing the pressure deviation in the entire floating separation unit under the influence of the swirling flow. The cause of the pressure deviation is eliminated to suppress the occurrence of drift. In addition, in order to suppress the drift, turbulence should not occur in the flow of the fluid, and it is advantageous that the linear velocity of the fluid is not as large as possible at the same flow rate, so the floating separation part of the device should be located on the edge side, not inside the cylindrical cylinder. do.

In the present invention, it is also possible to maintain the constant flow of the fluid in the floating separator, thereby maintaining the floating separation performance of the floating material due to air bubbles.

Hereinafter, with reference to the drawings will be described in detail with respect to the structure of the pressure floating device using the swirl flow of the present invention.

As shown in Figures 1, 2a, 3a and 3b, the pressurized levitation device using a swirl flow according to the present invention has a body in which a cylindrical internal space is formed as a whole, and fluid flows in from the outside As it forms a swirling flow, the microbubbles float and combine with the floating material, and the fluid from which the floating material has been removed is discharged through the central portion, and the lower part has a hopper-shaped structure in which sedimented sludge is collected and discharged.

As a configuration for this, the pressurized flotation device 10 using swirl flow according to the present invention is provided by the floating separation unit 100 and the floating separation unit 100 that floats the floating material while fluid flows in and forms the swirl flow. The treated water induction pipe 200 through which the floating-separated fluid enters the floating material, the treated water discharge pipe 320 for discharging the finally filtered fluid from the treated water induction pipe 200, and the settling sludge are collected and discharged. It is configured to include a hopper-type settling sludge discharge unit 400.

More specifically, the floating separation part 100 is formed between the cylindrical outer wall 110 and the cylindrical inner wall 210 having an outer diameter smaller than the inner diameter of the outer wall 110 and the upper and lower surfaces open. Space.

The floating separation unit 100 has a fluid inlet pipe 130 and microbubbles through which fluid flows in a clockwise or counterclockwise direction based on a cross section of a space between the outer wall 110 and the outer wall 110. A micro-bubble injection tube 140 to be injected is provided, and a swirling flow is generated while the inflowing fluid and the micro-bubbles rotate along the space between the outer wall 110 and the inner wall 210.

At this time, the direction in which the fluid and the micro-bubbles flow in from the fluid inlet pipe 130 and the micro-bubble injection pipe 140 into which the micro-bubbles are injected is preferably the same direction. That is, when the fluid flows from the fluid inlet pipe 130 in the clockwise direction, the micro-bubble injection pipe 14 also allows the micro bubbles to be injected in the clockwise direction, and the fluid flows in the counterclockwise direction from the fluid inlet pipe 130 When possible, the micro-bubble injection pipe 14 also allows the micro-bubbles to be injected in a counterclockwise direction, thereby preventing turbulence from occurring in the floating separation tank by the flow of fluid and micro-bubbles in different directions.

As a method in which micro-bubbles are introduced from the micro-bubble injection tube 140, a method of introducing micro-bubble inflowing fluid in which the pressurized air is dissolved through the air compressor 12 is used. The air dissolved in the bubble inflow fluid becomes a micro-bubble, and these micro-bubbles form a swirling flow with the fluid flowing from the inlet pipe 130, and are mixed with floating substances in the fluid, thereby floating the floating part 100 As it floats to the upper portion, it is possible to separate and remove suspended matter in the fluid.

At this time, the method of injecting micro-bubbles through the micro-bubble injection pipe 140 is to supply the fluid in which air is dissolved from the air dissolving tank 13 in which the pressurized fluid and air are mixed into the floating separator 100. Alternatively, the air may be supplied from the outside of the microbubble injection tube 140 through which the pressurized fluid flows, and the fluid and air may be mixed in the microbubble injection tube 140 to supply it into the floating separation unit 100. In addition, the fluid injected with the micro-bubbles from the micro-bubble injection pipe 140 may supply raw water that has not been subjected to levitation separation, or circulate pump 11 through the treatment water discharged from the treatment water discharge pipe 320. It can also be supplied using.

On the other hand, the floating separation device 10 according to the present invention, as shown in the drawing, only the structure of dissolving air in the fluid to supply directly into the floating separation tank through the micro-bubble injection pipe 140 is shown, Alternatively, the fluid inlet pipe 130 and the micro-bubble injection pipe 140 may be configured in an integral form.

In more detail, rather than supplying the fluid in which air is dissolved directly into the floating separation tank through the micro bubble injection tube 140, the micro bubble injection tube 140 is external to the floating separation tank 100. By configuring in a form connected to the fluid inlet pipe 130, the micro-bubble inlet fluid in which the fluid (raw water) and air before the separation of the floating fluid are dissolved in one fluid inlet pipe 130 into the floating separation tank 100 It can be configured to supply together.

In addition to this, the present invention can be configured to include all of the well-known techniques used in the conventional floating separation tank in supplying the fluid dissolved by pressing the air through the fluid inlet pipe 130.

In addition, a floating sludge collection pipe 60 is formed on the cylindrical outer wall 110 so that the floating sludge floating in the floating separation unit can be discharged to the floating sludge outlet 61.

In addition, the upper portion of the floating separation unit 100 is provided with a floating sludge scraper 420 having a structure that rotates around the center of the floating separation unit, so that the floating sludge floating to the top of the floating separation unit 100 Is induced to be discharged to the floating sludge outlet.

In addition, the treated water induction pipe 200 is a space formed inside the cylindrical inner wall 210, and the fluid in which floating materials are floating in the floating separation unit 100 is opened to the inner wall 210. It flows through the lower surface and rises along the treated water induction pipe 200 which is the inner space of the cylindrical inner wall 210.

As described above, the fluid rising from the inside of the treated water induction pipe 200 is discharged to the outside through the treated water discharge pipe 320. More specifically, the treated water discharge pipe 320 is formed in the form of a pipe extending outside the outer wall 110 of the treated water induction pipe 200, and rises along the inside of the treated water induction pipe 200 Fluid to be discharged to the outside.

On the other hand, the micro floating material contained in the fluid flowing into the floating separation unit 100 can be floated to the upper portion of the floating separation unit 100 as microscopic sludge attached to the floating sludge. As it does not float to the top of the floating separation unit 100 is precipitated.

The present invention comprises a settling sludge discharge unit 400 as described above so as to collect and discharge the settling sludge while preventing the settling precipitated sludge from flowing into the treated water induction pipe 200.

The sedimentation sludge discharge unit 400 is a hopper-shaped space formed along the lower portion of the outer wall 110, and at the bottom, the sedimentation sludge outlet 62 for discharging sludge in the fluid sedimented by the floating separation unit 100 ) Is formed.

In addition, the present invention is to remove the drift by creating a swirling flow of the fluid flowing into the floating separation unit 100, to create a swirling flow of the fluid evenly to further improve the drift prevention effect, the floating separation Vent 100 has an outer diameter smaller than the inner diameter of the outer wall 110, has an inner diameter larger than the outer diameter of the inner wall 210, the vortex prevention device having a cylindrical shape with the upper and lower surfaces open ( 120).

In more detail, the vortex prevention device 120 may be formed at least one lower position than the fluid inlet pipe 130 and the micro-bubble injection pipe 140. That is, when the plurality of vortex prevention devices 120 are provided, the vortex prevention devices are provided in a plurality of cylindrical shapes having different axes and have different diameters, thereby stably generating drift by the vortex prevention devices 120. There is an effect that can be prevented.

In addition to the effect of preventing drift, the vortex prevention device 120 is a fluid flowing into the floating separation unit 100 by the vortex prevention device 120, and the fluid moves downward of the floating tank while forming a swirling flow. In contact with the vortex prevention device 120, the collision chance between particles is increased, and as a result, water treatment efficiency can be improved.

On the other hand, the pressurized levitation device 10 using a swirl flow according to the present invention, when the fluid flows into the floating separation unit 100 from the fluid inlet pipe 130 and the micro-bubble injection pipe 140, the fluid inflow As the fluid and micro-bubbles are lowered to the lower center of the floating separation unit 100 by the water pressure discharged from the tube 130 and the micro-bubble injection tube 140, the water and the micro-bubbles are directly lowered to the treated water induction pipe 200 without the separation process. Inflow problems can occur. That is, the micro-bubbles and suspended matter in the fluid can not be separated from the floating, and the water treatment efficiency of the pressurized floating device 10 may be reduced as it flows directly into the treated water induction pipe 200.

In the pressurized levitation apparatus 10 using the swirl flow according to the present invention, the fluid and the micro-bubbles flowing into the levitation separator 100 are directly lowered to the lower portion of the levitation separator 100 to prevent such a problem from occurring. It is designed not to.

Looking in more detail, as shown in Figures 4, 5 and 6, the fluid inlet pipe 130 is horizontally extending from the outside of the outer wall of the floating separation unit 100 toward the inner wall As a structure formed in the form, it is configured to include at least one fluid distribution pipe 131 through which fluid is discharged in a clockwise or counterclockwise direction based on a cross section of the space between the outer and inner walls. By distributing the fluid through the fluid distribution pipe 131, it is possible to minimize the local eddy generated by the discharge of the fluid by reducing the velocity of the fluid flow.

In addition, when the vertical upper direction of the floating separation unit 100 is 0 degrees, the fluid distribution pipe 131 is formed at least one in the fluid inlet pipe with an angle of 0 degrees or more and 90 degrees or less (FIG. 5, 6), even if turbulence that may be caused by fluid influx affects the upper side of the floating tank, it is possible to minimize the impact to the lower side. It is possible to prevent the solids to be injured due to the vortices generated by the inflow of raw water and micro-bubbles into the treated water induction pipe 200 by the above-described means.

In addition, in the floating separation device 10 according to the present invention, the micro-bubble injection pipe 140 is higher than the top of the vortex prevention device 120 and lower than the fluid inlet pipe 130 from the outside of the outer wall. A micro-bubble distribution pipe (141) having a structure formed in the form of a pipe extending horizontally toward the inner wall and discharging micro-bubbles in a clockwise or counter-clockwise direction based on a cross section of the space between the outer and inner walls It comprises at least one.

As described above, the microbubble injection pipe 140 is preferably formed at a position higher than the upper end of the vortex prevention apparatus 120 and equal to or lower than the fluid inflow pipe 130. Through this structure, it is possible to increase the mixing rate of the fluid and micro-bubbles flowing into and descending from the fluid inlet pipe 130, and at the same time, it is possible to prevent the micro-bubbles in the fluid from flowing into the treated water induction pipe 200.

In addition, when the vertical upper direction of the floating separator 100 is 0 degrees, the micro-bubble distribution pipe 141 is formed at least one on the outer wall of the micro-bubble injection pipe with an angle of 0 degrees or more and 90 degrees or less. , It is possible to prevent the micro-bubbles in the fluid from flowing into the treated water induction pipe 200.

On the other hand, the fluid inlet pipe 130 and the micro-bubble distribution pipe 141, as shown in Figures 1, 2a and 4, the central axis of the fluid induction pipe 200 at a position opposite the outer wall It may be formed in a direction facing each other as a reference, as shown in Figures 3a and 3b, may be formed in the same direction toward the central axis of the fluid induction tube 200 at the same vertical axis position of the outer wall, Or, it may be formed in different directions toward the central axis of the fluid guide tube 200 at different vertical axis positions of the outer wall.

In addition, the pressure flotation device 10 using a swirl flow according to the present invention is another configuration for preventing the micro-bubbles and floating substances in the fluid from being injured and separated and directly flowing into the treated water induction pipe 200, It may be configured by providing a fluid inlet guide plate (not shown) in the lower portion of the micro-bubbles.

The fluid inlet guide plate is formed in a predetermined width and length along the direction in which the fluid rotates under the fluid inlet pipe 130 and the micro-bubble injection pipe 140, and the micro-bubbles in the fluid by the fluid inlet guide plate and It is possible to effectively prevent the floating material from flowing into the treated water induction pipe 200.

In addition, the pressure flotation device using a swirling flow according to the present invention, in order to prevent the sludge precipitated in the floating separation unit 100 is attached to the lower surface of the precipitation sludge discharge unit 400, and hardened, FIG. 2A, 3A, and 3B, a precipitation sludge scraper 421 may be provided on the lower surface of the precipitation sludge discharge unit 400.

The sedimentation sludge scraper 421 is rotated by receiving power from the reduction gear 410 by a rotating shaft 430 formed along the central portion of the treated water induction pipe 200 while being deposited on the lower surface of the sedimentation sludge discharge unit 400 Sludge is not attached, it can be made to be able to move in the direction of the settling sludge outlet 62 along the lower slope of the settling sludge discharge unit 400.

Hereinafter, with reference to FIGS. 1, 2A and 3B, the flow of fluid, floating sludge and sedimentation sludge in the pressurized flotation device 10 using swirl flow according to the present invention will be described.

Pressurized injury device 10 using a swirl flow according to the present invention is the fluid and air is pressurized through the fluid inlet pipe 130 and the micro-bubble injection pipe 140, the dissolved fluid is introduced into the floating separation unit 100 The air in the fluid is microbubbled, and the fluid forms a swirl flow along the vortex prevention device 120 between the outer wall 110 and the inner wall 210.

As such, while the fluid rotates along the swirl flow in the floating separator 100, the floating sludge in which the suspended solids and micro bubbles in the fluid are combined floats to the upper portion of the floating separator 100, and the large and heavy sedimentation sludge floats. It is precipitated by the sedimentation sludge discharge unit 400 at the bottom of the unit 100 and discharged to the outside of the pressurized flotation device 10 through the sedimentation sludge outlet 62.

The treated water in which floating substances are separated from the fluid flows into the lower surface of the treated water induction pipe 200 through the lower portion of the floating separation unit 100, and the treated water introduced into the treated water induction pipe 200 is treated water induction pipe It rises along 200 and is discharged to the outside through the treated water discharge pipe 320.

On the other hand, the pressure flotation device using a swirl flow according to the present invention is a second embodiment, instead of the treated water discharge pipe 320, the fluid rising from the inside of the treated water induction pipe 200, the upper outside of the treated water induction pipe It may be configured to be discharged by passing over to the treated water discharge unit (not shown) formed in the.

In more detail, the treated water discharge unit surrounds the outer surface of the inner wall 210 from a predetermined height position of the outer surface of the inner wall 210, and is formed between the partition wall (not shown) and the inner wall 210 formed in the upper direction. As a space to be formed, a treatment water outlet for discharging a fluid flowing over the inner wall 210 from the upper portion of the treatment water guide pipe 200 is formed.

In addition, in order to prevent the inflow of the floating sludge from the floating separation unit 100 and the treatment water rising from the treated water induction pipe 200, the inner wall 210 is the outer wall 110 ) And a lower height than the partition wall.

In this way, since the height of the inner wall 210 forming the space of the treated water induction pipe 200 is lower than that of the partition wall and the outer wall 110, only the fluid in which floating materials are floating is separated from the treated water induction pipe 200 In the direction of the treated water discharge.

On the other hand, despite the structure of the floating separation unit 100 as described above, some floating materials may not be separated and may be introduced into the treated water induction pipe 200. As described above, when a suspended material flows into the treated water induction pipe 200, a floating material may float along the treated water induction pipe 200 and pass to the treated water discharge unit.

In the present invention, a sludge inflow prevention wall (not shown) is disposed on the upper portion of the treated water induction pipe 200 in order to prevent a problem that the floating sludge floating above the treated water induction pipe 200 flows into the treated water discharge unit. And a sludge inflow prevention plate (not shown).

The sludge inflow prevention wall has an outer diameter smaller than the inner diameter of the inner wall and has a cylindrical shape with upper and lower surfaces open, and the lower and upper surfaces are formed higher than the lower and upper surfaces of the inner wall 210, respectively. do.

In addition, the sludge inflow prevention plate is formed in a horizontal direction toward the center direction of the treated water guide tube 200 from the inner surface of the inner wall 210 at a predetermined length lower than the lower surface of the sludge inflow prevention wall.

At this time, the lower surface and the upper surface of the sludge inflow prevention wall are respectively formed higher than the lower surface and the upper surface of the inner wall 210, and the sludge inflow prevention plate of the inner surface of the inner wall 210 and the sludge inflow prevention wall. It is formed in a horizontal direction toward the central direction of the treated water guide pipe 200 from the inner surface of the inner wall 210 at a length equal to or greater than the distance between the outer surfaces, and by providing a space to allow the fluid to rise in the center, the treatment The sludge rising to the top of the water induction pipe 200 is prevented from flowing into the discharged portion of the treated water.

As described above, in the pressure flotation device 10 using the swirl flow according to the second embodiment of the present invention, the treated water in which floating substances are floating in the fluid in the floating separation unit is processed through the floating separation unit 100 lower part. The water flowing into the lower surface of the water induction pipe 200, and the treated water flowing into the treated water induction pipe 200 rises along the treated water induction pipe 200, and the inner wall 210 from the upper portion of the treated water induction pipe 200 Beyond, it flows into the treated water discharge.

At this time, in the upper portion of the treated water induction pipe 200, the floating sludge flowing into the treated water induction pipe 200 may not be separated from the floating separation unit 100 through the structural combination of the sludge inflow prevention wall and the sludge inflow prevention plate. Block the inflow into the treated water outlet.

As described above, the floating material is firstly separated from the floating separation unit 100, and the second floating material is separated from the treated water induction pipe 200, and the final treated water flowing into the treated water discharge unit is formed in the treated water discharge unit. It is discharged to the outside of the pressurized levitation device 10 through the treated water outlet.

In addition, the pressure flotation device using the swirl flow according to the present invention is a third embodiment, and unlike the second embodiment, the treated water discharge unit (not shown) is located inside the treated water induction pipe 200. It can also be configured.

More specifically, the treated water discharge portion is located in the center of the treated water induction pipe 200, but having a smaller outer diameter than the inner diameter of the inner wall 210, the cylindrical partition wall having an open top surface (not shown) As a space formed therein, a treatment water outlet for discharging a fluid flowing over the partition wall from an upper portion of the treatment water guide pipe 200 is formed.

In addition, in order to prevent the inflow of sludge floating from the floating separation unit 100 and the treatment water rising from the treated water induction pipe 200, the partition wall 312 is provided with the outer wall 110. And a lower height than the inner wall 210.

In this way, since the height of the partition wall forming the space of the treated water discharge portion is lower than the outer wall 110 and the inner wall 210, only the fluid in which floating materials are floated and separated is discharged from the treated water induction pipe 200 You can go in the negative direction.

In addition, as described above, when the treatment water discharge unit is configured to be located inside the treatment water induction pipe 200, the sludge inflow prevention wall and the sludge inflow prevention plate are configured differently accordingly.

That is, the sludge inflow prevention wall has an outer diameter smaller than the inner diameter of the inner wall 210 and an inner diameter larger than the outer diameter of the partition wall, and has a cylindrical shape in which upper and lower surfaces are open, and a lower surface of the inner wall ( 210) is formed higher than the lower surface, the upper surface is formed higher than the upper surface of the partition wall.

In addition, the sludge inflow prevention plate is formed in a horizontal direction on the outer surface of the partition wall at a predetermined length lower than the lower surface of the sludge inflow prevention wall.

At this time, the sludge inflow prevention plate is formed in a horizontal direction on the outer surface of the partition wall at a length equal to or greater than the distance between the outer surface of the partition wall and the inner surface of the sludge inflow prevention wall, thereby rising to the upper portion of the treated water induction pipe 200 Prevents it from flowing into the treated water outlet.

As described above, in the pressure flotation device 10 using the swirl flow according to the third embodiment of the present invention, the treated water in which floating substances are separated from the fluid is treated water guide pipe through the bottom of the floating separator 100 ( 200) The treated water flowing into the lower surface and flowing into the treated water guiding tube 200 rises along the treated water guiding tube 200, and crosses the partition wall at the upper part of the treated water guiding tube 200 and enters the treated water outlet. do.

At this time, in the upper portion of the treated water induction pipe 200, the floating sludge flowing into the treated water induction pipe 200 may not be separated from the floating separation unit 100 through the structural combination of the sludge inflow prevention wall and the sludge inflow prevention plate. Block the inflow into the treated water outlet.

As described above, the floating material is firstly separated from the floating separation unit 100, and the second floating material is separated from the treated water induction pipe 200, and the final treated water flowing into the treated water discharge unit is formed in the treated water discharge unit. It is discharged to the outside of the pressurized flotation device 10 through the treated water outlet.

The present invention has been described above with reference to the embodiment shown in the drawings, but this is only exemplary, and those skilled in the art to which the art pertains may have various modifications and other equivalent embodiments. You will understand the point. Therefore, the technical protection scope of the present invention should be defined by the following claims.

10: Pressurized flotation device using swirl flow
11: Circulation pump
12: air compressor
13: air dissolution tank
60: floating sludge
61: exit of sludge
62: sedimentation sludge exit
100: floating separator
110: outer wall
120: vortex prevention device
130: fluid inlet pipe
131: fluid distribution pipe
140: micro bubble injection tube
141: Micro bubble distribution pipe
200: treated water induction pipe
210: inner wall
320: treated water discharge pipe
400: settling sludge discharge unit
410: reducer
420: floating sludge scraper
421: settling sludge scraper
430: rotating shaft

Claims (9)

A space formed between a cylindrical outer wall and a cylindrical inner wall having an outer diameter smaller than the inner diameter of the outer wall and an open bottom surface, wherein the fluid inlet pipe containing the contaminant flows and the microbubbles into which the microbubble fluid is injected As the injection tube is formed, a swirling flow is generated as the inflowing fluid and the microbubbles rotate along the space between the outer and inner walls, and the flotation separation unit in which the sludge in the fluid is combined with the microbubbles and floats;
A floating sludge collection pipe formed on an upper portion of the cylindrical outer wall and including a floating sludge outlet through which the sludge floating in the floating separation unit is discharged;
A floating sludge scraper which is provided on the floating separation unit and rotates around the center of the floating separation unit to induce floating sludge to be discharged through the floating sludge collection pipe to the floating sludge outlet;
As the space formed inside the inner wall of the cylindrical, the floating water is floating fluid in the floating separation unit is introduced through the lower surface of the inner wall of the inner wall, the treated water induction pipe rises along the inner space of the cylindrical inner wall;
It is formed in the form of a pipe extending to the outside of the outer wall of the treated water induction pipe, the treated water discharge pipe discharges the fluid rising along the inside of the treated water induction pipe; And
A hopper-shaped space formed along the lower portion of the outer wall, wherein the sedimentation sludge discharge unit is provided with a sedimentation sludge outlet for discharging sludge in the fluid sedimented by the floating separation unit. Pressurized injury device using. According to claim 1,
In the floating separation unit,
A vortex prevention device having an outer diameter smaller than the inner diameter of the outer wall, a larger inner diameter than the outer diameter of the inner wall, and a cylindrical shape in which the upper and lower surfaces are open; than the fluid inlet pipe and the microbubble injection pipe. It characterized in that at least one is formed at a low height position, the pressure flotation device using a swirl flow. According to claim 1,
The fluid inlet pipe,
It is formed in the form of a pipe extending from the outside of the outer wall of the floating separator toward the inner wall, and the pipe discharges the fluid flowing into the pipe into the floating separator to cause swirl flow in the radial section of the floating separator space. It characterized in that it is configured to include at least one or more; fluid distribution pipe discharged in a clockwise or counterclockwise direction based on the cross-section, pressurized injury device using a swirl flow. According to claim 1,
The micro-bubble injection tube,
The vortex prevention device 120 is formed in the form of a pipe extending horizontally from the outside of the outer wall toward the inner wall at a position higher than or equal to or lower than the fluid inlet pipe, and the pipe is formed with micro-bubbles flowing into the pipe Fluid in a clockwise or counterclockwise direction based on the cross-section to discharge the inflowing fluid into the floating separation section in the same direction as the fluid discharged from the fluid inflow pipe to cause swirl flow in the radial section of the floating separation section space. It characterized in that it comprises at least one or more micro-bubble distribution pipe is discharged, pressurized flotation device using a swirl flow. According to claim 3,
The fluid distribution pipe,
When the vertical upper direction of the floating separator is 0 degrees, one or more are formed on the outer wall of the fluid inlet pipe with an angle of 0 degrees or more and 90 degrees or less, thereby preventing floating substances in the fluid from flowing into the treated water induction pipe Characterized in that, the pressure flotation device using a swirl flow. According to claim 4,
The micro-bubble distribution pipe,
When the vertical upper direction of the floating separator is 0 degrees, one or more are formed on the outer wall of the microbubble injection tube with angles of 0 degrees or more and 90 degrees or less, so that microbubbles in the fluid are introduced into the treated water induction pipe. It characterized in that it is prevented, the pressure injury device using a swirl flow. According to claim 1,
In order to prevent the sludge precipitated in the floating separation unit from being attached to the lower surface of the sedimentation sludge discharge unit and hardened, a sedimentation sludge scraper is provided on the lower surface of the sedimentation sludge discharge unit, and pressurization using swirl flow Injury device. According to claim 1,
The microbubble inlet pipe is not installed separately, and the microbubble inlet fluid is connected to the fluid inlet pipe and contaminant-containing fluid and micro-bubble inlet fluid are simultaneously introduced into the floating separator through the fluid inlet pipe. Pressurized flotation device using swirl flow. According to claim 1,
A pressurized flotation device using a swirling flow, characterized in that a floating sludge scraper for scraping the floating sludge is added to the upper portion of the floating separation unit.

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