KR20200127747A - Solid-liquid separator using settling and dissolved air flotation - Google Patents

Abstract

The present invention relates to a solid-liquid separation device for separating a fluid (liquid) and particles (solid) in the fluid in a process of water purification, wastewater treatment, and the like and, more specifically, to a solid-liquid separation device using sedimentation and pressurized flotation, comprising: a sedimentation part improving the sedimentation efficiency of large particulate sludge in the fluid by preventing the occurrence of single flow through generation of swirling flow in the fluid; and a floating part improving the flotation efficiency of small particulate sludge in the fluid through pressurized flotation separation, thereby maximizing a solid-liquid separation effect even with a small installation area.

Description

Solid-liquid separation device using sedimentation and pressurized floatation {SOLID-LIQUID SEPARATOR USING SETTLING AND DISSOLVED AIR FLOTATION}

The present invention relates to a solid-liquid separation device using sedimentation and pressurization, and more particularly, a settling tank for sedimenting and removing foreign substances by preventing drift by forming a swirling flow and attaching microbubbles to foreign substances contained in a fluid. The present invention relates to a new solid-liquid separation device that improves the solid-liquid separation effect by fusing a pressurized flotation tank that separates and removes foreign substances from the fluid by using a method of floating up to the limit surface where the fluid and air are in contact.

In general, there are a sedimentation method and a flotation separation method as methods for removing solid particles in a fluid such as sewage or wastewater.

The precipitation method precipitates and removes solid particles. This precipitation method decreases the sedimentation efficiency of fine particles due to drift occurring in the fluid supplied into the sedimentation tank. There was a problem that required a lot of time and time.

In addition, there is a problem that low-density particles such as algae, oil, grease, synthetic detergent, iron and magnesium do not settle, but float and pass to the treated water area.

On the other hand, the pressurized flotation method is much shorter than the conventional precipitation method, with a treatment time of less than 30 minutes, and has excellent effect on removing particles with low density, and it can be constructed as a small-scale facility to save space cost of the treatment plant. Due to its advantages, it has been widely applied to water treatment facilities in recent years.

The pressurized flotation method is commonly used as a method for removing contaminants from fluids such as sewage or wastewater.If there are more floating matters (oil, grease, suspended solids, etc.) lighter than water, the injured material is placed above the water instead of sinking it. It is a wastewater purification method used for the purpose of removing it by making it rise.

The principle of this pressurized flotation method is that when air is dissolved in the fluid to be treated under pressure and opened to atmospheric pressure, the air dissolved in the fluid changes into a number of microbubbles, and these microbubbles adhere around the suspended matter in the fluid. This is a method of removing the suspended substances by reducing the specific gravity of the suspended substances so that they float above the fluid.

However, in the conventional pressurized flotation device, an excessive amount of purified water and fine bubbles must be injected in order to float and remove all incoming solids. Therefore, excessive power is consumed, and some of the floated solids are precipitated and the flotation effect is reduced. There was.

In accordance with the above circumstances, the present invention prevents drift in the sedimentation tank, thereby increasing sedimentation efficiency and shortening the sedimentation treatment time. The sedimentation method and microbubbles are sufficiently mixed with the fluid to prevent the It is intended to present a technology for a new solid-liquid separation device that improves the solid-liquid separation effect by fusing the flotation separation method with improved contact efficiency.

Next, the prior art existing in the field to which the technology of the present invention belongs will be briefly described, and then the technical matters that the present invention is to achieve differently compared to the prior art will be described.

First, Korean Patent Publication No. 10-0883312 (announced on February 11, 2009) relates to a non-powered high-efficiency sedimentation tank, and more specifically, it is possible to precipitate sludge with high efficiency using a swirling flow while simultaneously conducting a chemical aggregation reaction. Description of the settling tank is described.

In addition, Unexamined Patent Publication No. 10-2018-0100004 (published on September 6, 2018) relates to a circular pressure flotation device, and more specifically, a contact tank is configured to have an annular accommodation space, and wastewater and microbubble water By injecting the mixed water tangentially into this 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 are rotated and risen in the space without pollutants. A technology related to a pressurized flotation device that maximizes contact of microbubbles is described.

In addition, Registration Patent Publication No. 10-1639414 (2015.01.14.) is equipped with a slewing-type floating separation tank, and the treated water recovery pipe and the floating scum collection tube are concentrically arranged with respect to the center line of the swirling flow in the floating separation tank. Disclosed is a technique related to a pressurized flotation device capable of simultaneously separating sedimentary and floating matters in raw water by forming a descending stream together with an ascending current in the batch and flotation tank.

The above prior art documents are a technology related to a sedimentation tank using a swirling flow, a technology related to a pressurized flotation device that improves contact between microbubbles and contaminants, and a pressurized flotation device that removes both sedimentable and floating matter in a fluid. Although described above, technology related to a solid-liquid separation device having the effect of completely separating floating particles and settling particles in a fluid through a fusion of a settling tank and a pressurized flotation tank with improved efficiency as in the present invention Was not presented.

Registered Patent Publication No. 10-0883312 (2009.02.11.Notification date) Registered Patent Publication No. 10-2018-0100004 (published on September 6, 2018) Registered Patent Publication No. 10-1639414 (announced on July 15, 2016)

The present invention was invented to solve the above problems, and by generating a constant swirling flow inside the sedimentation zone, which has improved sedimentation efficiency by preventing the occurrence of drift, and the floating matter by increasing the contact rate between fine bubbles and suspended matter. It is intended to provide a technology for a solid-liquid separation device using sedimentation and flotation separation that allows both sedimentary particles (large particles) and floating particles (fine particles) in the fluid to be removed by including a pressurized floating zone with improved rate. Having that purpose.

In order to achieve the above object, the present invention provides a solid-liquid separation device using a sedimentation and a pressurized float, wherein the solid-liquid separation device includes a cylindrical housing; A separating plate dividing the upper and lower portions of the inner space of the housing; And a cylindrical cylinder positioned in the upper center of the separating plate and spaced apart from the sidewall of the cylindrical housing in the inner space of the cylindrical housing, so that the inner space of the cylindrical housing is divided, and in the lower space of the separating plate A sedimentation unit located and configured to allow fluid to flow from the sidewall of the housing to form a swirling flow and move to the center, and to settle deposits in the fluid at the center; A microbubble mixing unit for mixing microbubbles by receiving the fluid in which the precipitate is deposited from the settling unit as a space formed in the cylindrical cylinder extending upward from the center of the upper surface of the separating plate; Among the upper spaces of the separating plate, as a space between the cylindrical cylinder extending upward from the center of the upper surface of the separating plate and the cylindrical housing, a fluid mixed with micro-bubbles is transferred from the micro-bubble mixing unit, It provides a solid-liquid separation device using a sedimentation and pressurized float, characterized in that it has a; floating portion for removing the combined particulate matter by floating to the upper and discharging the treated water from which the solids in the fluid have been removed.

In one embodiment of the present invention, the sedimentation portion has a hopper-shaped lower surface extending from a lower portion of the side wall, and a fluid inlet pipe allowing a swirling flow of fluid to be formed inside the housing is provided from the outside of the housing. A settling sludge scraper for removing settled sludge deposited on the lower surface of the hopper type and a settling sludge discharge pipe for discharging the settled sludge deposited in the fluid may be provided.

In addition, in the inner space of the settling part, a slewing flow guide plate in the form of a cylindrical cylinder having a diameter smaller than that of the settling part and having an open top and bottom surface may be further installed, and a vibrator may be further installed on the vortex guide plate. .

In one embodiment of the present invention, the microbubble mixing unit has a microbubble injection tube for injecting microbubbles, and the upper surface is opened so that the fluid mixed with the microbubbles rises and then the fluid flows over to the floating part. It may be characterized by having.

In one embodiment of the present invention, the floating portion is provided with a floating sludge scraper for removing the floating sludge floating on the water surface by combining with the fine bubbles in the upper portion, and a fluid discharge pipe through which the descended treated water is discharged is formed. You can do it.

A chemical injection pipe for injecting chemicals for treatment of chemicals for water treatment in addition to the fluid discharged through the fluid discharge pipe; A drug reaction unit for mixing and reacting the drug and the fluid injected through the drug injection pipe; And a treated water discharge pipe for discharging the fluid treated by the chemical reaction unit to the outside.

In one embodiment of the present invention, an opening is provided in the separating plate corresponding to the lower surface of the microbubble mixing unit so that fluid can be introduced from the sedimentation unit, and the outlet of the opening is the microbubble mixing unit By being positioned in a tangential direction toward the inner space of the bubble mixing part, the fluid introduced into the microbubble mixing part may form a swirling flow.

In one embodiment of the present invention, a floating sludge discharge unit through which the floating sludge removed by the floating sludge scraper is introduced and discharged to the outside; may be additionally installed on the upper part of the floating part.

In an embodiment of the present invention, the solid-liquid separation device of the present invention further includes a driving device for driving a scraper for removing sludge, and a rotating shaft connected to the driving device is installed through the microbubble mixing unit and the sedimentation unit. You can do it.

The present invention is provided with a pressurized flotation zone that improves the flotation rate of the suspended matter by increasing the contact rate between microbubbles and the suspended matter, and a sedimentation zone that improves sedimentation efficiency by preventing the occurrence of drift by generating a constant swirling flow inside. And, by supplying fluid (raw water) to the sedimentation zone located below, the fluid rises from the sedimentation zone to the pressurized flotation zone, firstly sedimenting large particles in the fluid in the settling zone, and secondly, in the fluid in the pressurized flotation zone. Microparticles can be floated, thereby improving solid-liquid separation efficiency.

In addition, the present invention can shorten the solid-liquid separation time than when using only the precipitation method by applying a combination of the precipitation method for removing large particles and the pressurized flotation method for removing fine particles as described above, and only the pressure flotation method is used. Circulating water of a smaller capacity is used, and solid-liquid separation can be obtained stably even if the coagulation chemical is not properly injected, and solid-liquid separation can be performed with high efficiency even with a relatively small installation space.

1 is a cross-sectional view schematically showing the structure of a solid-liquid separation apparatus using precipitation and a pressurized float according to an embodiment of the present invention.
2 is a top plan view of a sedimentation and pressure flotation apparatus according to an embodiment of the present invention.
3 is a schematic cross-sectional view of the structure of a solid-liquid separation device equipped with a swirling flow guide plate according to an embodiment of the present invention.
4 is a simulation result of a fluid flow in a settling part according to the presence or absence of a swirling flow guide plate according to an embodiment of the present invention.
5 is a schematic cross-sectional view of a structure of a solid-liquid separation device in which a vibrator is installed on a swirling flow guide plate according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a solid-liquid separation apparatus using precipitation and pressure floatation will be described in detail so that those of ordinary skill in the art may easily implement the present invention.

In each of the drawings of the present invention, the sizes or dimensions of the structures are shown to be enlarged or reduced compared to the actual size for clarity of the present invention, and the known configurations are omitted so as to reveal the characteristic configuration, so the drawings are not limited thereto. .

In describing the principles of the preferred embodiments of the present invention in detail, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

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

The present invention is a solid-liquid separation device that separates a fluid (liquid) from a particle (solid) in a fluid in the process of water purification and wastewater treatment, and prevents the occurrence of drift by allowing the fluid to form a swirling flow, and large particulate sludge in the fluid. It relates to a solid-liquid separation device that uses a combination of a sedimentation unit that has improved sedimentation efficiency and a floating unit that improves the flotation efficiency of small particulate sludge in a fluid through pressurized flotation separation. By supplying fluid (raw water) in the normal direction to the sedimentation zone located at, the fluid rises from the sedimentation zone to the pressurized flotation zone, firstly sedimenting large particles in the fluid in the settling zone, and secondly, in the fluid in the pressurized flotation zone. It relates to a solid-liquid separation apparatus using precipitation and pressurized floating, characterized in that by floating and removing fine particles.

Hereinafter, the structure of the solid-liquid separation apparatus using the sedimentation and pressurization float of the present invention will be described in detail with reference to the drawings.

1 and 2, the solid-liquid separation apparatus 10 using the precipitation and pressurization float according to the present invention has a settling portion 100 at the lower end of the housing in which the overall cylindrical inner space is formed. It has a structure in which large particles in the fluid are precipitated, and a pressurized floating part 300 is formed on the upper part to float fine particles in the fluid, and a fluid from which particles are separated through precipitation and flotation is discharged to the outside.

As a configuration for this, the solid-liquid separation apparatus 10 using the precipitation and pressurization float according to the present invention comprises: a separation plate 50 dividing the upper and lower parts of the inner space of the housing 370 made of a cylindrical shape; And a cylindrical cylinder 230 located in the upper center of the separating plate 50 and spaced apart from the sidewall of the cylindrical housing 370 in the inner space of the cylindrical housing 370. It is formed so that the inner space is divided, is located in the lower space of the separating plate 50, and fluid flows in from the sidewall of the cylindrical housing 370 to form a swirling flow and moves to the center. A sedimentation unit 100 to allow precipitation; As a space formed inside the cylindrical cylinder 230 extending upward from the center of the upper surface of the separating plate 50, the fluid in which the precipitate is deposited is transferred from the sediment 100 to mix fine bubbles. Bubble mixing unit 200; In the upper space of the separating plate 50, a space between the cylindrical cylinder 230 extending upward from the center of the upper surface of the separating plate 50 and the cylindrical housing 370, wherein the microbubble mixing unit A floating part 300 for receiving the fluid mixed with the microbubbles from the microbubbles and removing the particulate matter combined with the microbubbles by floating to the top and discharging the treated water from which the solids have been removed is provided.

More specifically, the sedimentation part 100, the microbubble mixing part 200, and the floating part 300 are formed in the cylindrical housing 370. The housing 370 has a cylindrical inner space by sidewalls having a cylindrical inner surface, and the inner space is divided into upper and lower portions by the separating plate 50.

The sedimentation part 100 is a space formed under the housing 370 and may have a hopper-shaped lower surface extending from a lower portion of the sidewall of the housing 370, and the separating plate 50 It has a structure that is distinguished from the floating portion 300 by.

The lower surface of the hopper type has a structure in which a settling sludge scraper 120 for removing deposited sludge and a settling sludge discharge pipe 130 for discharging the settling sludge settled in the fluid are provided.

As described above, the solid-liquid separation device 10 according to the present invention comprises the lower surface of the sedimentation unit 100 in a hopper shape, and includes a sedimentation sludge scraper 120, so that the sedimentary sludge is deposited on the lower surface of the sedimentation unit 100. It can be prevented from being attached and hardened and can be smoothly discharged through the sludge discharge pipe 130.

In addition, the sedimentation unit 100 is provided with a fluid inlet pipe 110 through which fluid is introduced from the outside, and the fluid inlet pipe 100 is formed of the discharge port so that the fluid flowing into the sedimentation unit 100 forms a swirling flow. It is formed so that the direction is a tangential direction of the housing of the settling part 100.

The fluid inlet pipe 110 having such a structure may generate a slight eddy current due to the largest fluid velocity toward the fluid inlet pipe 110, but the fluid rotates along the sidewall of the settling portion 100 and the settling portion ( 100) Since the linear velocity of the swirling flow decreases sharply from the inner periphery to the center, sedimentary particles can be settled while preventing the occurrence of drift.

As shown in FIG. 3, a swirling flow guide plate 140 may be additionally installed in the inner space of the settling part 100. When the swirl flow guide plate 140 is installed, the effect of slowing the swirl flow of the fluid is generated by acting as an effective resistance to the fluid flow, and since the occurrence of drift is also prevented, precipitation of sedimentary particles becomes more active. The swirling flow guide plate 140 is a cylindrical cylinder having a diameter smaller than the diameter of the settling portion, and the upper and lower surfaces thereof are open. When the number of the swirling flow guide plates 140 is 2 or more, the diameters of the swirling flow guide plates are different so that they do not overlap. The narrower the gap between the swirl flow guide plates 140 is, the greater the degree to which it acts as a resistance of the swirl flow, thereby slowing down the swirl flow of the fluid, and thus is more effective in sedimentation of sedimentary particles.

4A is a result of a computational simulation of the fluid flow in the sedimentation unit 140 when there is a swirling flow guide plate, and (b) shows a result of the computational simulation of the fluid flow in the settling part 140 when there is no swirling flow guide plate. From the result of the computational simulation, it can be predicted that the fluid flow in the presence of the swirling flow guide plate becomes more uniform in the entire sedimentation area to suppress the occurrence of drift, and is effective in sedimentation because the slow flow area is widened.

In addition, the vortex flow guide plate 140 may be installed with a guide plate having a lower height toward the center as shown in (b) of FIG. 3, because the flow velocity outside the settling portion is large and the flow velocity decreases toward the center. This is because the height of the swash plate acting as a resistance can be reduced.

When the swirling flow guide plate 140 is installed as described above, foreign substances may accumulate between the swirling flow guide plates 140 according to a long operation, or microorganisms may proliferate to block the fluid movement path. At this time, as shown in FIG. 5, the vibrator 150 is installed on the swirling flow guide plate 140 and periodically induces vibration to remove foreign substances.

Returning to FIG. 1, the microbubble mixing unit 200 is spaced apart from the outer wall of the floating unit 300 in the inner space of the floating unit 300 and the inside of the cylindrical cylinder 230 having a predetermined diameter. As a space formed in, it is located above the sedimentation part 100.

An opening 210 is formed in the separating plate 50 corresponding to the lower surface of the cylindrical cylinder 230 so that the fluid rising from the sediment 100 can flow.

In addition, the cylindrical cylinder 230 is formed with a micro-bubble injection tube 220 for injecting micro-bubbles into the fluid flowing through the opening 210, and the fluid mixed with the micro-bubbles rises and then the cylindrical cylinder 230 The upper surface of the cylindrical cylinder 230 has an open structure so that it can pass through the upper part of the cylinder.

At this time, the opening 210 is composed of a tubular nozzle 210, and the outlet of the nozzle 210 is located in the tangential direction of the side wall of the cylindrical cylinder 230 at the outer periphery of the microbubble mixing unit 200 , It is configured to form a swirling flow in the microbubble mixing unit 200. In this way, the mixing ratio of the microbubbles and the fluid is increased by the swirling flow of the fluid generated in the microbubble injection pipe 220.

In addition, when microbubbles are injected into the microbubble mixing unit 200, the apparent density of the fluid decreases due to the influence of the bubbles, and the flow of the fluid is generated. It is advantageous to have a structure in which the bubble mixing unit and the settling unit 100 are separated by a separating plate 50 in order to prevent the injury of foreign substances.

On the other hand, as a method in which fine bubbles are introduced from the microbubble injection pipe 220, a method in which a fluid in which pressurized air is dissolved is introduced through an air compressor is used. Air becomes microbubbles, and these microbubbles form a swirling flow with a fluid in the microbubble mixing unit 200 and are mixed.

In this case, the method of injecting microbubbles through the microbubble injection pipe 220 may supply a fluid in which air is dissolved from an air dissolving tank in which pressurized fluid and air are mixed into the microbubble mixing unit 200. , Air may be supplied from the outside of the microbubble injection pipe 220 through which the pressurized fluid flows, and the fluid and air may be mixed in the microbubble injection pipe 220 and supplied to the microbubble mixing unit 200. In addition, the fluid injected together with the microbubbles from the microbubble injection pipe 220 may supply the fluid (treated water) discharged from the floating part 300 using a circulation pump.

In addition to injection of microbubbles, a coagulant may be injected into the microbubble mixing unit 200 if necessary. At this time, the coagulant may be injected by configuring a separate pipe from the microbubble injection pipe, or may be injected together with the microbubble injection pipe.

The floating part 300 is a space formed between the side wall of the housing 370 and the side wall of the inner cylindrical cylinder 230 of the upper space of the separating plate 50, from the microbubble mixing part 200 The fluid mixed with the microbubbles overflows into the upper open space of the cylindrical cylinder 230 and flows into the floating part 300.

A floating sludge scraper 320 is provided on the upper part of the floating part 300 to remove the floating sludge floating on the water surface by combining with microbubbles, and descending on the lower sidewall of the cylindrical housing 370 of the floating part 300 It has a structure in which a fluid discharge pipe 310 through which fluid is discharged is formed.

In addition, a floating sludge discharge unit 330 through which the floating sludge removed by the floating sludge scraper 320 is introduced and discharged to the outside is provided on the upper portion of the floating part 300.

That is, by being provided with a floating sludge scraper 320 having a structure rotating around the center of the floating portion 300 as an axis on the upper portion of the floating portion 300, the floating portion 300 floated above the floating portion 300 Induces sludge to be discharged to the floating sludge discharge unit 330.

Meanwhile, the sedimentation sludge scraper 120 in the sedimentation part 100 and the floating sludge scraper 320 in the flotation part 300 are connected to a rotation shaft formed along the center of the solid-liquid separation device 10 to rotate. The rotating shaft receives power from a connected reducer.

In addition, the solid-liquid separation device 10 according to an embodiment of the present invention is a chemical injection pipe 340 for injecting chemicals for treatment of chemicals for water treatment in addition to the fluid discharged through the fluid discharge pipe 310, the chemical injection A chemical reaction unit 350 for mixing and reacting the chemical and fluid injected through the pipe 340 and a treated water discharge pipe 360 for discharging the fluid mixed and reacted with the chemical in the chemical reaction unit 350 to the outside. By additionally including, it may be configured to perform subsequent water treatment such as pH adjustment.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but these are only exemplary, and those of ordinary skill in the field to which the technology pertains, various modifications and other equivalent embodiments are possible. I will understand the point. Therefore, the technical protection scope of the present invention should be determined by the following claims.

10: solid-liquid separation device using precipitation and pressurized flotation
50: separation plate
100: settling part
110: fluid inlet pipe
120: sedimentation sludge scraper
130: sludge discharge pipe
140: swirl flow guide plate
150: vibrator
200: fine bubble mixing unit
210: opening (nozzle)
220: microbubble injection tube
230: cylindrical cylinder
300: injured part
310: fluid discharge pipe
320: floating sludge scraper
330: sludge discharge unit
340: medicine injection tube
350: chemical reaction part
360: treated water discharge pipe
370: cylindrical housing

Claims (7)

In the solid-liquid separation device using precipitation and pressurized flotation,
The solid-liquid separator may include a cylindrical housing; A separating plate dividing the upper and lower portions of the inner space of the housing; And a cylindrical cylinder positioned in the upper center of the separating plate and spaced apart from the sidewall of the cylindrical housing and installed in the inner space of the cylindrical housing to separate the inner space of the cylindrical housing,
A sedimentation unit located in the lower space of the separating plate, the fluid flowing from the sidewall of the housing to form a swirling flow and moving to the central portion, and allowing sediment in the fluid to settle at the central portion;
A microbubble mixing unit for mixing microbubbles by receiving the fluid in which the precipitate is deposited from the settling unit as a space formed in the cylindrical cylinder extending upward from the center of the upper surface of the separating plate;
Among the upper spaces of the separating plate, as a space between the cylindrical cylinder extending upward from the center of the upper surface of the separating plate and the cylindrical housing, the micro-bubbles and the fluid mixed with the micro-bubbles are transferred from the micro-bubble mixing unit. A solid-liquid separation device using a sedimentation and pressurized flotation, characterized in that having a; flotation unit for removing the combined particulate matter by floating to the top and discharging the treated water from which the solids are removed.
The method of claim 1,
The settling portion has a hopper-shaped lower surface extending from a lower portion of the sidewall, and a fluid inlet pipe for forming a swirling flow of fluid inside the housing is formed from the outside of the housing toward the interior space of the housing, and the hopper-shaped A solid-liquid separation device using a settling and pressurized float, characterized in that the lower surface is provided with a settling sludge scraper for removing the settling sludge and a settling sludge discharge pipe for discharging the settling sludge settled in the fluid.
The method of claim 1,
A solid-liquid separation device using a sedimentation and pressurization float, characterized in that the inner space of the sedimentation portion is smaller than the diameter of the sedimentation portion, and a vortex flow guide plate in the form of a cylindrical cylinder with open upper and lower surfaces is further installed.
The method of claim 3,
A solid-liquid separation device using a settling and pressurized float, characterized in that a vibrator is installed on the swirling flow guide plate of the settling part.
The method of claim 1,
Precipitation and pressure, characterized in that the microbubble mixing unit has a microbubble injection tube for injecting microbubbles, and the upper surface is open so that the fluid mixed with the microbubbles rises and then the fluid flows over to the floating part. Solid-liquid separation device using flotation.
The method of claim 1,
The separation plate corresponding to the lower surface of the microbubble mixing unit is provided with an opening to allow fluid to flow from the sedimentation unit, and the outlet of the opening is in a tangential direction from the outer side of the microbubble mixing unit toward the inner space of the microbubble mixing unit A solid-liquid separation device using a sedimentation and a pressurized float, characterized in that the fluid introduced into the microbubble mixing unit forms a swirling flow.
The method of claim 1,
A fluid discharge pipe through which the lowered treated water is discharged below the floating part; A chemical injection pipe for injecting chemicals for treatment of chemicals for water treatment in addition to the fluid discharged through the fluid discharge pipe; A drug reaction unit for mixing and reacting the drug and fluid injected through the drug injection pipe; And a treated water discharge pipe for discharging the fluid treated by the chemical reaction unit to the outside. 2. A solid-liquid separation device using precipitation and pressurization floatation.

Images