KR101936181B1 - Multistage dissolved air flotator - Google Patents

Abstract

The present invention relates to a pressurized float tank including a separating tank for separating suspended solids from incoming wastewater using pressurized returned water. The separating tank comprises a mixing header on one side which comprises: a wastewater inlet; a plurality of pressurized returned water inlets; a mixing space for internally mixing the pressurized returned water from a plurality of pressurized returned water inlets containing bubbles in accordance with the mixing of the wastewater from a wastewater inlet and air; and a mixed water dispersing plate for dispersing and discharging the mixed water mixed in the mixing space into a chamber of the separation tank.

Description

{MULTISTAGE DISSOLVED AIR FLOTATOR}

More specifically, the present invention relates to a multi-stage pressurized float tank, and more particularly, to a multi-stage pressurized float tank capable of efficiently introducing suspended solids into the float tank by efficiently introducing the pressurized transfer water in which the air is dissolved in the waste water containing a large amount of suspended solids flowing into the float tank, So that clear water can be obtained.

Numerous wastewaters are generated by industrial activities and human activities. When wastewater flows directly into rivers or oceans, wastewater can pollute rivers and oceans, causing serious environmental pollution and destroying ecosystems. In order to prevent environmental pollution, wastewater is forced to be discharged in the state where various pollutants are removed through wastewater treatment process.

There is a known physical method for removing suspended solids or suspended solids in the effluent during wastewater treatment. In this method, dissolved pollutants in wastewater are reacted with chemicals to solidify and float them in the form of suspended solids, float existing suspended solids, and remove the clear treated water.

A device for removal through floating of suspended matter is generally referred to as a pressurized floating bed. The known pressurized flotation tank applies a pressure of 4 ~ 6 Kg / cm2 to a pressurized tank containing water, injects air into the pressurized pressure tank and dissolves the injected air in water. The pressurized water may contain more air in the supersaturated state than atmospheric pressure. The pressurized water in the pressurized tank is mixed with the wastewater flowing into the flotation tank at atmospheric pressure. The supersaturated air is mixed with the wastewater under atmospheric pressure, and is adhered to the suspended solid in the wastewater.

That is, when the pressurized float tank dissolves air in the pressurized water and discharges it to the atmosphere at atmospheric pressure, the dissolved air is raised as fine bubbles, and the fine bubbles adhere to the suspended substances of the wastewater, . The floating material floating in this way is separated by the scraper of the pressurized floating tank.

The known pressurized floating tank is designed to handle 5 to 10 tons per hour per square meter of area. For example, to treat 100 tonnes of wastewater per hour, a pressurized flotation tank with an area of at least 10 square meters is required.

In the known known flotation type flotation tank, flotation substances contained in the wastewater are slightly crushed by mixing the pressurized transferring water into the wastewater inflow pipe to lower the flotation efficiency, or when the wastewater and the pressurized transferring water are separately introduced into the inlet of the pressurized flotation tank There is a limit in designing the area of the pressurized floating tank to be large.

Further, the pressurized transferring water has minute bubbles for floating the floating material. When the amount of fine bubbles is greater than a certain amount, the efficiency of separating suspended solids in the pressurized floating tank is increased. The pressurized transferring water is generated in the pressurized floating tank. The generation of minute bubbles in the pressurized tank is a pressure-dependent structure, so there is a very long problem such as the residence time in the pressurized tank of the pressurized transfer water is 3 to 5 minutes, and the size of bubbles generated in the existing pressurized tank is large There is a problem that the flotation efficiency is lowered in floating the floating material of the raw wastewater.

Thus, there is a need for a pressurized floating tank capable of eliminating the existing problems.

10-1455180 (B1), October 27, 2014

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a pressurized flotation apparatus which is compact and has a high flotation efficiency by effectively mixing mixed wastewater and pressurized transferring water, And the like.

Another object of the present invention is to provide a pressurized floatation vessel having an inclined plate and an inclined bottom so that floating and sediment can be smoothly separated and discharged.

In addition, the present invention provides a pressurized floating bed in which the mixing of the pressurized transfer water is performed in multiple steps so that the separation of the floating material and the precipitating material in the pressurized floating bath is performed in the entire space area of the pressurized floating bath. .

Another object of the present invention is to provide a pressurized floatation vessel capable of increasing the floatation efficiency of floating substances by discharging microbubbles from discharged circulating pressurized transferring water.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

The pressurized floatation vessel according to one aspect of the present invention includes a separating tank for separating suspended substances from the incoming wastewater by using pressurized transferring water, and the separating tank has, on one side, a waste water inlet, a plurality of pressurized transfer water inlets, A mixing space for mixing the pressurized transferring water from a plurality of pressurized transferring water inlets containing bubbles in accordance with the mixing of wastewater and air, and a mixed water dispersing plate for dispersing and discharging the mixed water mixed in the mixing chamber into a chamber of the separating bath Lt; / RTI > header.

In the above-described pressurized floating tank, the mixed water dispersion plate is a perforated plate having a plurality of holes of a designated diameter.

In the above-described pressurized float tank, the separating tank is arranged so that the suspended water of the mixed water, which is installed in the other side direction from the mixing header and dispersed and discharged from the mixing header, induces the flow upward in the slurry, The branch having a second height higher than that of the first inclined plate in the other separating tank, the mixed water suspended in the flow having been induced to flow by the first inclined plate, And a second swash plate.

In the above-described pressurized floating tank, the separating tank includes a first sludge collecting space for collecting the precipitate material according to the inclination provided below the first inclined plate and the second inclined plate, and a first sludge collecting space for collecting the precipitate collected in the first sludge collecting space. And a sludge discharge port, wherein the first swash plate and the second swash plate have a curved surface.

In the above-described pressurized floating tank, the separating tank is provided with a plurality of pressurized transfer water inflow pipes which are installed in the other side direction from the second swash plate and discharge the pressurized transferring water including air bubbles respectively in the downward direction, And a pressurized conveyance water distributing plate for distributing the pressurized conveyance water from the plurality of pressurized conveyance water inlet pipes with the grooves upward.

In the above-described pressurized float tank, the separation tank is formed by the additional mixing of the pressurized transferring water distributing plate and the plurality of pressurized transferring water inflow pipes in the other side direction and the mixed pressurized transferring water distributed and the mixed water discharged through the second swash plate A second sludge collecting space for collecting the precipitating material formed according to the inclination, and a second sludge discharging port for discharging the precipitate collected in the second sludge collecting space.

In the above-described pressurized floating tank, a pressurizing pump for pressurizing the transfer water discharged from the separating tank and a plurality of perforated plates provided at the pressurized transferring water inlet, the air inlet, and the air inlet are provided so that the relative positions of the nozzles of the pressurized transfer water inlet and the air inlet And a micro bubble tank which is generated in accordance with the position and generates a pressure transfer number of the swirling flow including bubbles of a specified size or smaller.

As described above, the pressurized float bath according to the present invention effectively improves the mixing of the incoming wastewater and the pressurized transfer water, and evenly distributes the mixed water to the pressurized floatation surface, which is compact and has an effect of improving floatation efficiency.

In addition, the pressurized floatation vessel according to the present invention as described above has an inclined plate and a sloped bottom floor, and is capable of smoothly separating and discharging the floatation material and the sedimentation material.

In addition, the pressurized floatation vessel according to the present invention as described above has a multi-stage mixing of the pressurized transferring water, so that the effect of separating the floatation substance and the sedimentation substance in the pressurized floatation vessel is made in the entire spatial region of the pressurized floatation vessel have.

In addition, the pressurized floatation vessel according to the present invention as described above has the effect of increasing the floatation efficiency of the suspended material by discharging microbubbles from the pressurized transferring water for circulation by utilizing a part of the treated water to be discharged.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

Fig. 1 is a view showing an exemplary overall configuration of a pressurized float tank.
2 is a diagram showing an exemplary configuration of a separation tank for a pressurized float tank.
3 is a view showing an exemplary front view of the separation tank viewed from the inflow direction of the wastewater.
4 is a view showing an exemplary external shape of the swash plate.
FIG. 5 is a view illustrating a process of treating incoming wastewater in the separation tank in various stages according to the present invention.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: It can be easily carried out. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a view showing an exemplary overall configuration of a pressurized float tank.

The DISSOLVED AIR FLOTATOR of FIG. 1 floats the suspended solids of the incoming wastewater using the pressurized transferring water and precipitates according to the internal structure and weight of the pressurized floating tank to treat the wastewater and extract clear water do.

The pressurized flotation apparatus according to the present invention includes a separating tank 10, at least one pressurizing pump 20 and a micro bubble tank 30, and collectively refers to the separating tank 10 itself. Thus, the pressurized float tank further includes the separation tank 10 and further includes the pressurizing pump 20 and the micro bubble tank 30.

The separation tank 10 is configured to separate the suspended substances from the incoming wastewater and to discharge the treated wastewater from the incoming wastewater. The separation chamber (10) is configured to float suspended solids in the raw wastewater (sediment) or precipitate them, thereby separating suspended solids from the raw wastewater.

The separating tank 10 can mix the pressurized transferring water in which air is dissolved in the raw wastewater and float suspenders in the wastewater through fine bubbles in the pressurized transferring water. The fine bubbles contained in the pressurized transfer water may float in combination with the suspended substances in the wastewater. The minute bubbles in the pressurized transferring water may be fine bubbles having a size of 25 mu m or more and having a size of, for example, 40 to 100 mu m or less.

The separation tank 10 according to the present invention is configured to mix the pressurized transfer water and the wastewater at a plurality of locations. The separating tank 10 floats the floating material by mixing the wastewater drawn in through the inlet with the pressurized transferring water in the mixing header 110 and introduces the additional pressurized transferring water into the intermediate tank in the separating tank 10 tank, After the first separation of the material, the remaining floating material is floated so that it can be separated. Accordingly, the separation tank 10 can obtain cleaner treated water than the existing known floating float tank.

The separation tank 10 will be described in detail with reference to FIG.

The pressurizing pump 20 pressurizes the treated water (returning water) discharged from the separating tank 10. Each of the plurality of pressurizing pumps 20 is capable of outputting the pressurized transferring water having a specified pressure (for example, 5 kg to 6 kg) to the micro bubble tank 30 by applying pressure to the incoming process water (transfer water) have.

The micro bubble tank (30) injects air into the pressurized transferring water from the pressurizing pump (20) to generate pressurized transferring water in a state in which air is dissolved and outputs it to the separation tank (10).

The microbubble tank 30 according to the present invention includes a pressurized transferring water inlet for receiving pressurized transferring water (circulating water) from at least one pressurizing pump 20, an air inlet for introducing air and a pressurized transferring water outlet do.

The nozzles of the pressurized transferring water inlet are inserted into one side of the tank 30 to eject the circulating water toward the diverging air inlet side of the other side against the one side. Air is introduced into the micro bubble tank 30 through the air inlet, and a plurality of perforated plates are installed at the air inlet.

For example, the microbubble tank 30 may include a first perforated plate directly coupled to the air inlet in the tank 30, a second perforated plate coupled to the first perforated plate, and a third perforated plate coupled to the second perforated plate have. The diameter of the first perforated plate (and / or the third perforated plate) and the diameter of the second perforated plate may be different. For example, the diameter of the perforations of the second perforated plate may be less than the diameter of the first (third) perforations. The perforated plate may be made of aluminum, stainless steel, plastic or the like.

Small-sized air can be introduced into the micro bubble tank 30, which is advantageous for producing micro-bubbles through the perforated plate coupled to the air inlet.

The nozzle of the pressurized transferring water inlet discharges the pressurized transferring water in the diagonal direction of the opposite side and the discharged pressurized transferring water is discharged to the outside of the air inlet at a position (on the other side in the diagonal direction) different from the nozzle of the pressurized transferring water inlet And combines with the air discharged through the perforated plate.

Accordingly, the micro bubble tank 30 includes a large number of bubbles of a predetermined size or less (for example, 100um or less) favorable to the floating of the suspended material, and the discharge of the pressurized transferring water in the diagonal direction and the outward appearance (for example, cylindrical shape) And generates a pressure conveying number of the swirl flow which rotates accordingly. The air mixed by the micro bubble tank (30) is dissolved in the pressurized transfer water and generates fine bubbles.

Through the combination of the air and the pressurized transferring water through the perforated plate and the generation of the swirling flow, the microbubble tank 30 according to the present invention provides a remarkable improvement in the residence time of the pressurized transferring water (circulating water) . A conventional known pressurized tank requires a retention time of about 2 to 3 minutes for generating minute bubbles of a predetermined size or less required for floating of a suspended material. However, the microbubble tank 30 according to the present invention has a retention time of about 20 to 30 seconds The size of the micro bubble tank 30 can be drastically reduced and the minute bubbles formed by the vortical flow can easily adhere to the suspended material of the raw wastewater to increase the floating efficiency.

2 is a view showing an exemplary configuration of the separation tank 10 of the pressurized float tank.

The drawing of Fig. 2 preferably shows a cross-sectional view as viewed from the side of the inflow direction and the discharge direction of the wastewater.

Referring to FIG. 2, the separation tank 10 includes a mixing header 110, at least one swash plate 120, at least one sludge outlet 130, at least one treated water outlet 140, Collector 150, at least one pressurized-return-water inlet pipe 160, a pressurized-return-water distributor 170, and at least one sludge collection space 180.

The separating tank 10 is configured in the form of a chamber (tank) of a specific material (for example, aluminum, stainless steel, iron) to treat a specified amount of inflow wastewater per hour and to separate the floating material from the wastewater, So that the treated water can be discharged.

The mixing header 110 is installed on one side of the separating tank 10 (the side in the inflow direction of the wastewater) and is connected to the original wastewater flowing in the separating tank 10, The water is premixed before flowing into the chamber (tank), and the mixed water in which the waste water and the pressurized transfer water are mixed is discharged to the space inside the chamber (tank).

As shown in FIG. 3, the mixing header 110 formed on one side (inlet side) of the separation tank 10 includes a waste water inlet 111 and a plurality of pressurized transfer water inlets 113. Preferably, the mixing header 110 includes a single wastewater inlet 111 at the center and a plurality of pressurized feedwater inlets 113 at the left and right sides of the wastewater inlet 111. The pressurized transferring water inlet 113 is installed at a lower position (height) than the waste water inlet 111 from the bottom surface of the separating tank 10. Accordingly, the incoming wastewater can be easily attached (attached) to the fine bubbles in accordance with the minute bubbles of the pressurized transferring water drawn through the pressurized transferring water inlet 113.

Although it is possible to consider direct introduction of pressurized transfer water into the waste water pipe, in this case, a side effect of pulverizing suspended substances in the wastewater due to pressure by the pressurized transfer water occurs, causing a problem of lowering the efficiency of separation of suspended substances. On the other hand, the mixing header 110 according to the present invention efficiently removes the side effect of the suspended substances in the suspended water through the ascending minute bubbles of the pressurized transfer water, which is introduced at a lower position than the waste water inlet in a separate space, Fine bubbles can be attached.

As shown in FIGS. 2 and 3, the mixing header 110 has a mixing space 115 in which waste water and pressurized transfer water can be mixed. The wastewater is introduced into the mixing space 115 and a plurality of pressurized transferring waters are charged at a position lower than the wastewater to be mixed with each other. A large number of fine bubbles are generated due to a large number of the pressurized transferring water being introduced to the atmospheric pressure, and the minute bubbles rising and rising in the mixing space 115 can be combined with the suspended substances of the wastewater.

The cross sectional area in the vertical direction of the mixing space 115 increases as it moves toward the chamber (tank) side. That is, the mixing space 115 is inclined upward and downward toward the chamber, so that the floating material of the mixed water to be raised is easily guided to rise and the floating material to precipitate the mixed water can be easily lowered.

The mixing header 110 further includes a mixed water dispersion plate 117. The mixed water dispersion plate 117 may be a perforated plate having a plurality of holes of a predetermined diameter (for example, 5 mm, 10 mm, 20 mm, etc.). The mixed water dispersion plate 117 uniformly disperses and discharges the mixed water mixed in the mixing header 110 into the chamber of the separating tank 10. The mixed water dispersion plate 117 has a size equal to or larger than the cross-sectional area of the mixing space 115 at the chamber end so that the mixed water can be uniformly discharged into the chamber of the separation tank 10 through the holes of the perforated plate . This can prevent the occurrence of the drifting of the mixed water, thereby making it possible to utilize the entire area of the separation tank 10 efficiently.

At least one swash plate (120) is fixedly installed in the chamber of the separation tank (10). The separation tank 10 preferably has a plurality of swash plates 120 and one swash plate 120 (hereinafter referred to as a "first swash plate") is disposed in the chamber from the installation surface of the mixing header 110 in the discharge direction side As shown in Fig. The other swash plate 120 (hereinafter referred to as "second swash plate") is fixedly installed so as to have an inclination specified on the discharge direction side from the first swash plate 120.

The height of the first swash plate 120 and the second swash plate 120 are different from each other and preferably the height of the second swash plate 120 is higher than the height of the first swash plate 120. As shown in FIG. 2, the first swash plate 120 is configured to induce the suspended substances, which are bound to the minute bubbles of the mixed water discharged from the mixed water dispersion plate 117 of the mixing header 110, do. The second swash plate 120 installed at the discharge direction side and having a higher height is configured such that the suspended water of the mixed water in which the upward flow is induced by the first swash plate 120 is settled according to the height of the second swash plate 120 and the inclination of the second swash plate 120 .

In other words, the first swash plate 120 induces the rising of the suspended material, while the second swash plate 120 moves the heavy suspended material out of the suspended material to the second swash plate 120, do. The first swash plate 120 and the second swash plate 120 may have an inclination of, for example, 50 to 70 degrees.

The width of the first swash plate 120 and the second swash plate 120 may be the same as the horizontal width of the chamber (depth when viewed from the side), so that at least the amount of suspended solids of mixed water discharged through the mixed water dispersion plate 117 Up and down. The floating material that is joined to the minute bubbles by the first swash plate 120 can float to the upper surface of the separating tank 10 more easily and the floating material that is heavier by the second swash plate 120 moves to the second surface The precipitation can be easily induced by the height and inclination of the swash plate 120.

As can be seen from FIG. 4, the surface of the swash plate 120 (the first swash plate 120 and / or the second swash plate 120) is configured to have a bend or curve. For example, the swash plate 120 may have a bend in the horizontal direction (see FIG. 4A) or a bend in the vertical direction (the height direction, see FIG. 4B). Or the swash plate 120 may have any form of curvature.

The swash plate 120 according to the present invention is wider than the plain swash plate 120, which has a flat surface area by bending, so that it is possible to effectively provide an area required for rising and falling of mixed water. That is, the swash plate 120 is bent so that the mixed water that has contacted the swash plate 120 is guided so that the floating substances can sufficiently rise through the surface of the swash plate 120, So that it can be sufficiently lowered through the surface.

The sludge outlet (130) discharges the suspended solids precipitated in the separation chamber (10). The sludge discharge port 130 may discharge the precipitated material, for example, which has fallen in the sludge collecting space 180 in the separating tank 10 chamber.

One sludge discharge port 130 (hereinafter referred to as a "first sludge discharge port") includes a first swash plate 120 and a sludge collecting space 180 1 sludge collecting space "). The other sludge discharge port 130 (hereinafter referred to as "second sludge discharge port") is connected to another sludge collecting space 180 (hereinafter referred to as "second sludge collecting space") after the addition of the additional pressurized transferring water And is configured to discharge precipitated precipitate.

The treated water outlet 140 discharges the treated water from which suspended matters are separated from the raw wastewater. The separation tank 10 may have a plurality of process water outlets 140 and a specific one or more process water outlets 140 may be connected to the pressurization pump 20 to supply the pressurized water to the pressurization pump 20, (Return number). Other specific treatment water outlet 140 may be discharged to the outside while the contaminated (suspended) material is removed.

The floating sludge collector (150) removes floating matters floating on the surface of the separation tank (10). The floating sludge collector 150 includes or represents, for example, a skimmer or a scraper. The floating sludge collector 150 is provided with a collector for collecting motors and floating materials (sludge) to remove floating sludge from the surface through the motor.

The sludge collecting space 180 is contained in the chamber of the separating tank 10 to collect the precipitating material. The first sludge collecting space 180 is located below the first swash plate 120 and the second swash plate 120 and is disposed at a lower side of the first swash plate 120 and the second swash plate 120 along the outer inclination (inclination of the chamber) To the first sludge discharge port (130) through an inclined gradient.

The second sludge collecting space 180 is formed by separating the suspended material through the first swash plate 120 and the second swash plate 120 and separating the pressurized conveyance water inflow pipe 160 and the pressurized conveyance water dispersing plate 170 And the second sludge discharging port 130. The sedimenting material is collected through an inclined gradient formed in accordance with an additional mixing of the mixed water and the pressurized transferring water. The second sludge collecting space 180 is provided with additional precipitation materials of the mixed water discharged from the pressurized transfer water inflow pipe 160 and the pressurized transfer water dispersing plate 170 on the discharge direction side through the second swash plate 120 .

The plurality of pressurized transferring water inflow pipes 160 of the separation tank 10 output additional pressurized transferring water into the separation chamber 10 chamber. The plurality of pressurized-feed-water inflow pipes 160 have an "a" shape and discharge the pressurized transferring water in a downward direction of the separation tank 10. The plurality of pressurized transfer water inflow pipes 160 are installed on the discharge direction side from the second swash plate 120 so as to be remixed to the mixed water after being separated by the swash plate 120. Each of the pressurized transferring water inflow pipes 160 discharges the pressurized transferring water containing air bubbles from the microbubble tank 30 in the downward direction (downward direction) of the separating tank 10.

The pressurized conveyance water distributing plate 170 disperses the pressurized conveyance water discharged from the plurality of pressurized conveyance water inflow pipes 160 from the upward direction. The pressurized-conveyance-water distributor plate 170 has grooves (furrows, grooves) having a shape of 'V'. This groove is provided in the width direction (depth direction) of the separation tank 10 so that the pressurized transferring water discharged in the lower side (bottom surface) direction of the separation tank 10 of each of the pressurized transfer water inflow pipes 160 is dispersed . V-shaped grooves of the pressurized conveyance water distributor plate 170 may be formed through bending of stainless steel, aluminum, iron or the like.

The pressurized transferring water additionally introduced through the pressurized transferring water dispersing plate 170 can be mixed again with the mixed water subjected to the primary treatment through the swash plate 120 and the floating substances remaining after the primary treatment can be floated again.

FIG. 5 is a view showing a process of treating incoming wastewater in the separation tank 10 according to the present invention at various stages.

Since the construction of the pressurized float tank has already been described in detail, the sequential processing flow of the waste water in the separation tank 10 will be described below.

The raw waste water and the pressurized transferring water from the microbubble tank 30 are mixed in the mixing header 110 and the mixed water is uniformly discharged into the inner chamber of the separation tank 10 through the mixed water dispersion plate 117 . The discharged mixed water includes a suspended material, and the suspended material can rise in combination with the minute bubbles of the micro bubble pressurized transferring water.

The discharged mixed water is guided by the first swash plate 120 (see (2)). Particularly, the suspended material in the mixed water adheres to the fine bubbles of the pressurized transfer water and is levitated by the surface of the first swash plate 120. The first swash plate 120 has a curved surface, which more easily induces the floating material. The suspended material bound to the minute bubbles can rise to the surface of the separation tank 10 through the first swash plate 120.

On the other hand, some of the floating substances in the ascending mixed water are induced to descend through the second swash plate 120 (refer to (3)). For example, the suspended material having a heavy weight may be raised through the first inclined plate 120 in combination with the minute bubbles, but may be lowered due to the weight thereof and the height of the second inclined plate 120, And is settled in the collection space 180. The precipitated material (sludge) can be discharged to the outside through the first sludge discharge port 130.

The mixed water flows into the separation chamber 10 toward the discharge direction through the open space region (the space between the surface of the separation tank 10 and the height of the second swash plate 120) along the height of the second swash plate 120 It flows (see ④). This mixed water may be a treated water in which suspended matters have already been separated. However, untreated suspended matter remains in this treated water.

The plurality of pressurized transferring water inflow pipes 160 discharge the pressurized transferring water from the microbubble tank 30 to the lower pressurized transferring water distributing plate 170 and the pressurized transferring water distributing plate 170 transfers the pressurized transferring water (See ⑤) in the upward direction. For example, the pressurized conveyance water distributor plate 170 has a bent groove having a 'V' shape provided in the depth direction (width direction) of the separating tank 10, and pressurized conveyance water discharged into the bent groove And is distributed and discharged upward by a groove having a shape of 'V'.

Accordingly, the mixed water subjected to the primary treatment is re-mixed with the pressurized transferring water discharged and dispersed in the chamber of the separation tank 10, and the remaining suspended material can be joined to the fine bubbles again and floated to the surface. Some of the remaining suspended solids can be collected in the second sludge collecting space through slope (see ⑦).

Through this process flow, the present invention utilizes the entire chamber of the separation tank 10 to efficiently induce floating and sedimentation of suspended solids in a small installation space, thereby discharging clean treated water to the outside.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.

10: Separation tank
110: Mixed header
111: wastewater inlet 113: pressurized return water inlet
115: mixing space 117: mixed water dispersion plate
120: swash plate
130: Sludge outlet
140: treated water outlet
150: Floating sludge collector
160: Pressurized return water inlet pipe
170: Pressurized conveyance water distributing plate
180: Sludge collection space
20: Pressure pump
30: Micro bubble tank

Claims (7)

A pressurized floating tank comprising a separating tank for separating suspended substances from incoming wastewater using pressurized transfer water,
Wherein,
A plurality of pressurized transferring water inlets provided on the side of the waste water inflow direction at a position lower than the installation position of the waste water inflow port from the bottom surface of the separating bath respectively, A mixing space for mixing the pressurized transferring water introduced from a plurality of pressurized transferring water inlets containing bubbles therein and a plurality of holes having a specified diameter, and mixing water mixed in the mixing space through the plurality of holes A mixing header including a perforated plate dispersed and discharged into the chamber of the separating tank;
And a second sloping plate having a first height in the separating tank, the first sloping plate having a first height in the separating tank and a second sloping plate having a second height in the separating tank, ;
Wherein the suspended water of the mixed water having a second height higher than that of the first inclined plate in the separating tank and directed to flow by the first inclined plate is precipitated A second swash plate for guiding the swash plate;
A plurality of pressurized transfer water inflow tubes provided on the side of the second swash plate in the process water discharge direction and discharging the pressurized transfer water including air bubbles in the downward direction; And
And a pressurized-transfer-water dispersing plate having a V-shaped groove and distributing the pressurized transferring water discharged downward from the plurality of pressurized transfer water inflow pipes in the upward direction through the 'V' -shaped groove, Including,
Wherein the first swash plate and the second swash plate have a curved surface,
Pressurized flotation tank. delete delete The method according to claim 1,
Wherein,
A first sludge collecting space for collecting the precipitate material according to the inclination provided below the first inclined plate and the second inclined plate; And
And a first sludge discharge port for discharging the sediment material collected in the first sludge collecting space.
Pressurized flotation tank. delete The method according to claim 1,
Wherein,
A pressurized transferring water dispersing plate and a precipitating material formed on the side of the process water discharge direction from the plurality of pressurized transferring water inflow pipes and formed by further mixing the dispersed pressurized transferring water and the mixed water discharged through the second swash plate A second sludge collecting space for collecting according to the slope; And
And a second sludge discharge port for discharging the precipitate collected in the second sludge collecting space.
Pressurized flotation tank. The method according to claim 1,
A pressurizing pump for pressurizing the transfer water discharged from the separating tank; And
A pressurized transferring water inlet, an air inlet, a first perforated plate coupled to the air inlet, a second perforated plate coupled to the first perforated plate, and a third perforated plate coupled to the second perforated plate, And a micro bubble tank which is generated in accordance with the relative position of the first and second perforated plates and generates a pressure return number of the swirling flow including bubbles of a specified size or less through the passage of the first perforated plate, the second perforated plate and the third perforated plate ,
Wherein the pore diameter of the second punched plate is smaller than the pore diameter of the first punched plate and the pore diameter of the third punched plate,
Pressurized flotation tank.

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