KR101894792B1 - Dissolved Air Flotation Apparatus - Google Patents

Abstract

The present invention relates to a pressing levitation device comprising: a reaction tank (100); a liquid mixing device (300); a levitation separation device (400); a gas melting device (500); and a gas supply device (600). The present invention is able to obtain clean treated water by improving a levitation separation effect.

Description

[0001] Dissolved Air Flotation Apparatus [0002]

The present invention relates to a pressurized flotation apparatus, and more particularly to a pressurized flotation apparatus which comprises a reaction tank for mixing and stirring wastewater and chemicals, a chemical tank for storing chemicals to be supplied to the reaction tank, a liquid tank for mixing the reaction tank effluent and the precipitated sludge The present invention relates to a pressurized and floating device which is excellent in solid-liquid separation effect, including a floating separation device for separating particulate matter from effluent, a gas dissolving device for dissolving the gas in the sedimentation sludge, and a gas supply device.

In general, flotation and separation apparatuses are widely used for treating sewage and wastewater, and the flotation method is a method for flotation of contaminants in a suspension by removing water from a surface of water in the treatment of sewage and wastewater, And gravity-type injury methods, which are commonly referred to as injuries, in water treatment techniques.

Here, the particulate floatation method is a method of attaching air bubbles to a contaminant in a suspension to be separated, thereby remarkably increasing the floatation speed. Even if particles having a density higher than that of water are deposited, It is possible to increase the removal speed of the suspended particles by increasing the floating separation speed.

As described above, the floatation separation apparatus using the flood-type floatation method has a patent application filed and registered as a patent application No. 10-2008-0034902, which is a floatation system in which raw wastewater flows from the floatation tank; A micro-bubble generating device provided at a lower portion of the original wastewater inlet port on the floatation side to generate micro-bubbles in the incoming raw wastewater; A treated water collecting unit installed at a lower portion of the float tank to receive treated water from which suspended particles have been removed; A concentration rate control valve provided on an outer side of the floating tank to discharge a part of the treated water flowing through the treated water collection unit to the outside; A circulating water pump for pressurizing a part of the treated water flowing through the treated water collecting unit; And a gas dissolving tank for receiving pressurized water formed by dissolving air in circulating water pressurized by the circulating water pump and supplying pressurized water to the microbubble generator, wherein the gas dissolving tank is supplied by a compressor And a water level control sensor for opening and closing the circulation water passage and the air passage according to the water level is provided in the water dissolving tank.

However, in the conventional art as described above, since the scum layer removal port not only moves the scum layer floated on the water surface of the treated water in the floating tank as a whole, but also has an insufficient clearance on the water surface of the treated water formed on the inlet side of the scum layer removal port , The lack of free surface area on the water surface of the treated water and the moving speed of the scum layer due to the flow of the treated water is faster than the moving speed of the scum layer caused by the scum layer removal port. And a vibration occurs on the floatation surface due to the long length of the scum layer removing sphere, so that the scum layer can not be smoothly transferred due to the phenomenon that the water drops from the scum layer removed from the scum layer removing sphere. In addition, it dissolves oxygen in the circulating water in the gas dissolving tank internal Bentley pipe system, and circulation water in which oxygen is dissolved But due to the lack of surface area, the solubility of oxygen in the circulating water is low, but has the disadvantage that a limit to increase the dissolution of the oxygen in the circulating water.

Korean Patent Application No. 10-2008-0034902

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a pressurized floating apparatus capable of enhancing the floating separation effect and obtaining clean water.

In order to solve the above problems, a pressurized floating apparatus according to the present invention comprises a reaction tank 100 for growing a particle size by adding a chemical to a particulate pollutant contained in raw water to be introduced and a part of dissolved pollutants;
A tubular outer tube 310 having an outer tubular outlet 311 at one side thereof and an inner tubular inlet 321 and an inner tubular tubular outlet 322 to which the effluent of the reaction tank 100 is supplied, And a side pipe (330) connected to the side wall of the outer pipe (310) at a predetermined angle with the outer pipe (310).
A floatation separating tank 410 having a hollow shape with an empty interior having a hopper 411 communicated with the sedimentation sludge discharge pipe 413 at a predetermined position on a sloping bottom surface, Liquid separator inlet pipe 421 through which the mixed fluid flows, and a treatment water outlet pipe 426 through which the treated water from which particulate matter is removed is connected to the other side of the solid-liquid separator inlet pipe 421, A first separating wall 422 positioned in a horizontal direction so as to prevent the inflow fluid from moving downward, a second separating wall 423 positioned in a vertical direction so that the inflow fluid can not move sideways, (422) so as to be discharged from the treated water outlet pipe (426) after moving the overflowed fluid from the bottom to the bottom of the treated water outlet pipe (423) The floating separation tank 4 A solid-liquid separator 420 located in the floating separator 410 having a third separating wall 424 formed with a curved portion 424 'having an end directed toward the outer side positioned in the vicinity of the bottom surface of the solid- A skimmer 430 for collecting floating particulate matter located at an upper portion of the solid-liquid separator 420, and a scraper 440 for guiding the sedimented particulate matter located under the solid-liquid separator 420 to the hopper 411 A floating separation device (400);
A gas-dissolving device body 510 of a closed structure in which the interior of the gas-dissolving-device body 510 is closed, an upper portion of the gas- The bottom surface and the top of the bottom of the gas dissolving apparatus body 510 are bent at a predetermined angle so that the bottom surface and the top of the bottom surface are bent at a predetermined angle and the circulation inducing projection 521 of the bottom- And a circulation induction pipe 530 located inside the gas-liquid reaction tank 520. The one side is connected to the sedimentation sludge discharge pipe 413 and the other side is connected to the inside of the gas-liquid reaction tank 520 And a nozzle 542 extending to an upper portion of the circulation induction pipe 530. The side surface of the nozzle 542 is connected to a gas supply pipe 610 to supply a gas mixture to the circulation induction pipe 530 540), and A gas dissolving water discharge pipe 550 provided at the center of the bottom surface of the gas dissolving apparatus body 510 for supplying a fluid having a sieve dissolved therein to the side pipe 330, A gas dissolving apparatus 500 including a surplus gas discharge pipe 570 connected to an upper portion of the gas dissolving apparatus body 510 to supply the reaction gas to the reaction tank 100 and the other side located below the water surface of the reaction tank 100; And
And a gas supply device 600 connected to the gas supply pipe 610 for supplying gas to the gas-liquid mixing device 540.

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Also, in the pressurized floating device of the present invention, the side pipe 330 connected to the side wall of the outer pipe 310 is preferably connected to the outer pipe 310 at an angle of 0 ° to 90 ° with the inflowing fluid.

In addition, in the pressurized floating apparatus of the present invention, at least one separating wall provided in the solid-liquid separator (420) is provided with a first liquid separator (421) which is horizontally positioned to prevent the liquid flowing into the solid- It is preferable that the partition wall 422 is a partition wall.

In addition, in the pressurized floating apparatus of the present invention, at least one separating wall provided in the solid-liquid separator (420) is provided with a second liquid separator (420) which is vertically positioned to prevent the liquid flowing into the solid- It is preferable that the partition wall 423 is a partition wall.

In addition, in the pressurized floating apparatus of the present invention, at least one separating wall provided in the solid-liquid separator 420 may be provided in the bottom wall of the solid-liquid separator 420 so that the fluid can be discharged from the bottom to the bottom, The third partition wall 424 is preferable.

Also, in the pressurized floating apparatus of the present invention, it is preferable that the bottom of the gas-liquid reaction tank 520 is curved at a predetermined angle so that the liquid can be easily circulated.

In addition, in the pressurized floating apparatus of the present invention, a gas inlet pipe 543 connected to the gas supply pipe 610 is further provided on a side surface of the gas mixing device 540, and the gas inlet pipe 543 is connected to the gas- 540 to the sludge sludge at 0 ° to 90 °.

In addition, in the pressurized floating apparatus of the present invention, it is preferable that a predetermined lateral area of the gas-liquid reaction tank 520 is in contact with the inner wall surface of the gas dissolving apparatus body 510.

In addition, in the pressurized floating apparatus of the present invention, a surplus gas discharge pipe 570 is further provided at the upper part of the gas dissolving apparatus body 510, and excess gas discharged from the surplus gas discharge pipe 570 is supplied to the reaction vessel 100 .

The side pipe 330 connected to the sidewall of the outer pipe 310 is connected to the outer pipe 310 at an angle of 0 ° to 90 ° with the inflow fluid, One or more separation walls provided in the solid-liquid separator inlet pipe 421 may include a first separating wall 422 positioned in the horizontal direction so that the liquid introduced into the solid-liquid separator inlet pipe 421 can not move downward, A second separation wall 423 positioned in the vertical direction and a third separation wall 424 of a vertically lowered structure so that the fluid can be discharged from the bottom to the treated water outlet pipe 426, In the gas-liquid reaction tank 520, the bottom peripheral edge is bent at a predetermined angle so that the liquid can be circulated easily, and the outer wall predetermined region is in contact with the wall surface in the gas dissolving apparatus body 510, Liquid mixing device 540 Is connected to the gas inlet pipe 543 at an angle of 0 ° to 90 ° with the settling sludge and is connected to an excess gas discharge pipe 570 for supplying an excess gas discharged from the gas dissolving apparatus body 510 to the reaction vessel 100 ) Is provided on the gas dissolving apparatus body (510).

According to the pressurized floating apparatus of the present invention, since the solid-liquid separator having a plurality of partition walls positioned vertically and horizontally is provided, the particulate matter can be effectively separated and removed.

Further, according to the pressurized floating apparatus of the present invention, a gas-liquid reaction tank with a structure that facilitates circulation is provided, so that the gas dissolution rate of the precipitation sludge can be increased.

Further, according to the pressurized floating apparatus of the present invention, since the coagulated water flows in through the inner pipe inlet of the liquid-liquid mixing apparatus while the gas dissolved water flows into the bypass pipe, it is possible to suppress the flocculation of flocculated water However, the cohesion and gas dissolution can be more completely mixed.

Further, according to the pressurized floating apparatus of the present invention, the surplus gas generated from the gas dissolving apparatus can be used for stirring the chemical and the raw water, and further the pressure of the gas dissolving apparatus body can be maintained at a predetermined pressure or more, Can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an overall schematic view of a pressurized floating apparatus according to a preferred embodiment of the present invention; FIG.
2 is an enlarged view of the liquid-liquid mixing apparatus, wherein (a) is a front view and (b) is a view seen from one side.
3 is an enlarged cross-sectional view of a floating separation device according to an embodiment.
4 is an enlarged sectional view of a floating separation device according to a modified embodiment.
5 is a perspective view of a solid-liquid separator according to a modification of the embodiment.
6 is an enlarged cross-sectional view of the gas dissolving apparatus.

Hereinafter, a pressurized floating apparatus according to the present invention will be described with reference to the accompanying drawings.

The use of the terms "comprises", "having", or "having" in this application is intended to specify the presence of stated features, integers, steps, components, parts, or combinations thereof, But do not preclude the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof.

Also, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an overall schematic view of a pressurized floating apparatus according to a preferred embodiment of the present invention; FIG.

1, the pressurized floating apparatus of the present invention comprises a reaction tank 100 for mixing and stirring wastewater and chemicals, a chemical tank 200 for storing chemicals to be supplied to the reaction tank, A floatation separating apparatus 400 for separating particulate matter from the effluent of the liquid-liquid mixing apparatus, a gas dissolving apparatus 500 for dissolving the gas in the settling sludge, and a gas supply device (600).

First, referring to the reaction tank 100, the reaction tank 100 has a function of growing the particle size by adding chemicals to the particulate contaminants contained in the raw water to be introduced and a part of the dissolved contaminants, And may be composed of one or more containers, more preferably a first flocculation tank 110, a neutralization tank 120, and a second flocculation tank 130. In the first flocculation tank 110, a relatively small floc is formed by the injection of the inorganic flocculant described later. In the neutralization tank 120, the pH lowered due to the introduction of the inorganic flocculant is adjusted to the neutral vicinity, A polymer flocculant to be described later is injected into the second flocculation tank 130 to form flocs having relatively large particles. The first to third stirrers 111, 121, and 131 are provided in the first flocculation tank 110, the neutralization tank 120, and the second flocculation tank 130 so that the chemicals and wastewater can be mixed well have.

The chemical tank 200 includes a first chemical tank 210 in which an inorganic coagulant to be supplied to the first flocculation tank 110 is stored, a neutralizer tank 220 in which chemicals for pH adjustment are stored and a third chemical tank 230 And the polymer flocculant supplied to the second flocculation tank 130 is accommodated.

Next, the liquid-liquid mixing apparatus for mixing the sedimentation sludge in which the gas is dissolved and the flocculated water flowing out from the second flocculation tank will be described. Fig. 2 (a) is a front view of the liquid-liquid mixing apparatus, and Fig. 2 (b) is a view seen from one side.

The liquid-liquid mixing apparatus 300 according to the present invention is a device for mixing flocculated water and gas-dissolved water discharged from the gas-liquid dissolving apparatus 500 as described above and introducing the mixed gas into the float-separated apparatus 400, It has a structure that can contribute to maximizing flotation by attaching fine bubbles while minimizing destruction of flocs.

Specifically, the liquid-liquid mixing apparatus 300 is provided with an outer outlet 311 through which the mixed water of the condensed water and the gas-dissolved water is discharged from one side, and an outer tube 311 having a substantially long cylindrical shape And an outer diameter smaller than an inner diameter of the outer tube 310. The outer tube 310 is partially positioned inside the outer tube 310 and partially protruded outside the outer tube 310 while passing through a predetermined region of the outer tube 310, And an inner pipe 320 formed with an inner pipe inlet 321 and an inner pipe outlet 322 through which water flows in and out.

Further, a side pipe 330 through which gas-dissolved water flows is provided on a side surface of the outer pipe 310. Here, the side pipe 330 is formed to have a length of 0 ° to 90 °, more preferably 0 ° to the direction of introduction of flocculated water so as to be naturally mixed with gas dissolved water while minimizing floc breakage of flocculated water flowing into the inner pipe inlet 321 Lt; RTI ID = 0.0 > 90. ≪ / RTI >

When the coagulating water and the gas-dissolved water are supplied to the liquid-liquid mixing device 300 having the above-described configuration, the coagulated water moves to the inner pipe outlet 322 through the inner pipe inlet 321, Since the dissolved water moves in the direction of the outer tube outlet 311 while rotating the space between the outer tube 310 and the inner tube 320, it is possible not only to inhibit the flocculation of the flocculated water, but also to prevent the flocculation water and the gas- .

Next, a floating separation apparatus 400 for separating particulate matter contained in mixed water to obtain treated water will be described with reference to FIG. 3 which is an enlarged sectional view of the floating separation apparatus.

The floatation separator 400 according to the present invention includes a floatation separator 410 having a predetermined shape with an empty interior, a solid-liquid separator 420 installed in an interior space of the floater separator 410, a skimmer 430, A scraper 440, and a water collecting tank 450.

The bottom surface of the floating separation tank 410 has a substantially circular shape in cross section and the bottom surface thereof has a hopper 411 so as to be easily collected by the hopper 411 provided in the predetermined region, It is inclined toward. A sedimentation sludge discharge pipe 413 is connected to one side of the hopper 411 in order to circulate a part of the precipitated sludge to the gas dissolving apparatus 500. In the solid-liquid separation process of mixed water, A scum outlet 412 is provided.

The solid-liquid separator 420 installed in the space of the floating separation tank 410 is provided with a mixed water inflow pipe 421 for introducing mixed water corresponding to the effluent of the liquid-liquid mixing device 300 at one side, And a treated water outlet pipe 426 through which the treated water from which particulate matter has been removed from the mixed water is discharged. Between the mixed water inlet pipe 421 and the treated water outlet pipe 426, there is further provided at least one separating wall for blocking the flow of mixed water or changing the flow direction. More specifically, the at least one separating wall may include a first separating wall 422 provided in the horizontal direction for blocking the downward movement of the mixed water introduced into the mixed water inflow pipe 421, And a second separating wall 423 vertically communicating with the mixed water inflow pipe 421 so as not to move. Accordingly, since the first and second separation walls 422 and 423 have a structure similar to that of the container having only the upper portion opened, the introduced mixed water moves only to the upper portion, and particulate matter Thereby facilitating the injury of the wearer.

In addition, the at least one separating wall may have a vertically downward light structure having a larger diameter as it goes downward about the first partition wall 422 located horizontally, while an end located in the vicinity of the bottom surface of the floating separator 410 faces outward And a third separating wall 424 made of a curved portion 424 '. Some particulate matter that has a large specific gravity and does not float near the water surface moves down the floatation separator 410 along the flow of water but collides against the third separating wall 422 of the bottom wall structure to settle to the bottom, Since the water outlet pipe 426 is located on the upper side surface of the third partition wall 422, the outflow of the particulate matter can be maximized.

On the other hand, the particulate matter floated near the water surface is removed by the skimmer 430 which is located on the upper part of the solid-liquid separator 420 and moves periodically or aperiodically, and then is discharged to the outside. The sludge settled at the bottom of the solid-liquid separator 420 is moved to the hopper 411 by the scraper 440 physically connected to the speed reducer 442 and the driving shaft 441. Particularly, the settled sludge collected in the hopper 411 is continuously discharged through the settling sludge discharge pipe 413 and then supplied to the gas dissolving apparatus 500, so that the settling of the particulate matter is facilitated, have.

The treated water discharged through the treated water outlet pipe 426 moves to the water collecting tank 450. The opening of the treated water outlet pipe 426 is positioned to protrude a predetermined height through the bottom surface of the water collecting tank 450, A water level adjuster 452 capable of vertically moving in a state of being separated by a predetermined distance for the purpose of adjusting the level of the floating separation tank 410 and a water collecting tank outlet 451 are provided at predetermined positions on the floor.

FIG. 4 is an enlarged cross-sectional view of a floating separation device according to a modification of the embodiment, and FIG. 5 is a perspective view of a floating separation device according to a modification of the embodiment. In the modified embodiment of the floating separation device shown in Figs. 4 and 5, the 3-1 separating wall 424-1, the 3-2 separating wall 424-2, the 3-3 separating wall 424-3, The rest of the configuration except for the support bar 425 is the same as that of the floating separation apparatus shown in Fig. 3. Therefore, only these configurations will be described.

In a modified embodiment of the floating separation device according to the present invention, it may be composed of two or more, more preferably three or more third separation walls. 3-2 separating wall 424-2 and the third separating wall 424-3 are sequentially positioned around the third separating wall 424-1 and the supporting bar 425 is positioned sequentially, They are fixed to each other. According to the modified embodiment described above, the treated water moving to the treated water outlet pipe 426 passes through the third-first partition wall 424-1, the third-second partition wall 424-2, and the third- It is possible to obtain cleaner treated water because the particulate matter contained in the treated water collides with these separated walls at this time.

Next, the gas dissolving apparatus will be described with reference to Fig. 6, which is a cross-sectional view showing an enlarged view of the gas dissolving apparatus. The gas dissolving apparatus 500 dissolves the gas for the purpose of floating the particulate matter contained in the flocculated water in the floating separator 400. The gas dissolving apparatus 500 includes a gas dissolving apparatus body 510, a gas-liquid reaction tank 520, a circulation induction pipe 530, a gas-liquid mixing apparatus 540, a gas dissolving water discharge pipe 550, a drain pipe 560, And an excess gas discharge pipe 570.

Specifically, the body of the gas dissolving apparatus 510 is a vertically erected long oval shape and a sealed structure in which the inside is hollow. A gas-liquid reaction tank (520), which is located inside the gas-dissolving apparatus body (510) and circulates the gas and the settling sludge in a mixed manner to dissolve the gas in the settling sludge, It is in contact with the wall and the other side is blocked while the top is open.

The circulation induction pipe 530 is an elongated cylinder having an empty interior and is positioned so as to be perpendicular to the height direction of the gas-liquid reaction tank 520 in a state of being spaced from the bottom surface of the gas-liquid reaction tank 520 by a predetermined distance.

The gas-liquid mixing apparatus 540, which is located at a predetermined distance from the gas dissolving apparatus body 510, is connected to the sedimentation sludge discharge pipe 413 at one side and the gas inlet pipe 543 So that the gas is primarily dissolved in the settling sludge, and these mixtures are secondarily dissolved in the gas while passing through the line mixer 541. The gas inlet pipe 543 is preferably installed at an angle of 0 ° to 90 ° with the settling sludge introduced into the gas mixing device 540 so that the gas and the settled sludge can be naturally introduced and mixed.

As the mixture containing gas is injected at a high speed into the circulation induction pipe 530, the mixture in the gas-liquid reaction tank 520 is moved upward and downward along the inner wall surface of the gas-liquid reaction tank 520, It is sucked back and circulates, so it is possible to dissolve a large amount of gas.

Here, it is preferable that the bottom edge of the gas-liquid reaction tank 520 is bent at a predetermined angle so that circulation of the mixture in the gas-liquid reaction tank 520 can be more easily performed, And it is most preferable that the bottom surface of the gas-liquid reaction tank 520 near the exit of the circulation inducing pipe 530 is provided with a circulation guiding projection 521 of a downwardly projecting light structure.

The bottom of the gas dissolving apparatus body 510 is further provided with a gas dissolving water discharge pipe 550 for transferring gas dissolved water to the liquid mixer 300 and a drain pipe 560 for intermittently separating and discharging gas.

In addition, an excess gas discharge pipe 570 is connected to the upper portion of the gas dissolving apparatus body 510. Since it is very difficult for the gas supplied to the gas dissolving apparatus 500 to completely dissolve, the internal pressure of the gas dissolving apparatus body 510 gradually increases, and consequently, may lead to an accident.

In the present invention, the outlet of the excess gas discharge pipe 570 is led to a predetermined level below the level of the first flocculation tank 110 (see FIG. 1) for the purpose of efficiently utilizing such undissolved gas. Specifically, when the outlet of the surplus gas discharge pipe 570 is located at a predetermined depth below the water surface, it is possible to maintain the inside of the gas dissolving apparatus body 510 at a predetermined pressure by the water pressure. At this time, And as a result, the gas can dissolve more in the sedimentation sludge. In addition, since a certain amount of gas is supplied to the first flocculation tank 110, a mixing effect of the wastewater and the chemicals can be expected, which can save the power required for stirring or further improve the stirring effect.

A gas supply pipe 610 for supplying a gas is provided between the gas supply device 600 and the gas inlet pipe 543 of the gas dissolving device, although the gas supply device 600 may be, for example, a compressor, do.

Hereinafter, a method for treating various types of contaminated water such as wastewater or sewage using the pressurized floating apparatus of the present invention having the above-described structure will be described.

The method for treating contaminated water according to the present invention comprises the steps of supplying contaminated water, adding chemicals to contaminated water, mixing coagulated water and gas-dissolved water, separating particulate matter contained in the mixed water to obtain treated water And dissolving the gas in the sedimentation sludge to produce gas dissolved water.

First, a step of adding a chemical while supplying contaminated water is described. The inorganic coagulant stored in the first chemical tank is added to a predetermined range while the contaminated raw water is supplied to the first flocculating tank. At this time, the mixture is mixed with the first stirrer and the excess gas of the gas-liquid dissolving apparatus is supplied together. The raw water thus stirred has a large flocs in the second flocculation tank in which the pH is neutralized through the neutralization tank and then the polymer flocculant is injected.

In the step of mixing the flocculated water and the gas-dissolved water, the flocculated water discharged from the second flocculation tank flows into the inner pipe inlet of the liquid-liquid mixing device, while the gas-dissolved water is supplied to the bypass pipe, Is discharged to the inner pipe outlet.

In the step of obtaining the treated water by separating the particulate matter contained in the mixed water, the mixed water discharged from the liquid-liquid mixing device is introduced into the solid-liquid separator inlet pipe provided in the floating separator and then moved upward, And the treated water separated from the particulate matter is discharged to the treated water outlet pipe while being moved in the order of the downward and upward direction by the first to third separating walls. Here, the particulate matter floating on the water surface is periodically discharged to the outside using a skimmer.

On the other hand, in the step of dissolving the gas in the sedimentation sludge to generate gas dissolved water, the sedimentation sludge is continuously discharged to the sedimentation sludge discharge pipe located in the lower part of the floatation separation tank and supplied to the gas- And then circulated in the gas-liquid reaction tank to dissolve the gas in the settling sludge. The gas-dissolved water in which the gas is dissolved is continuously supplied to the liquid-liquid mixing apparatus.

Having thus described a particular portion of the present invention in detail, those skilled in the art will appreciate that these specific embodiments are merely preferred embodiments and that the scope of the present invention is not limited thereby, It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the invention, and that such modifications and variations are intended to fall within the scope of the appended claims.

100: Reactor
110: first flocculation tank 111: first stirrer
120: neutralization tank 121: second stirrer
130: second flocculation tank 131: third stir tank
200: chemical tank
210: first medicine tank
220: Neutralizer tank
230: Second drug tank
300: Liquid mixing device
310: Appearance
311: Exit exit
320: Inner pipe
321: Inner pipe inlet 322: Inner pipe outlet
330:
331: access tube 332: access tube
400: Float separator
410: floating separation tank
411: hopper 412: scum outlet
413: Settling sludge discharge pipe
420: solid-liquid separator
421: Solid-liquid separator inlet pipe 422: First separation wall
423: second separating wall 424: third separating wall
424-1: partition wall 3-1; partition wall 424-2: partition wall 3-2;
424-3:
426: treated water outflow pipe
430: Skimmer
440: Scraper
441: drive shaft 442: speed reducer
450: treated water collecting tank
451: Sewage tank outlet 452: Water level controller
500: Gas dissolving device
510: gas dissolving device body
520: gas-liquid reaction tank
521: projection for circulation induction
530: circulation induction pipe
540: gas-liquid mixing device
541: line mixer 542: nozzle
543: gas inlet pipe
550: Gas dissolution water discharge pipe
560: drain pipe
570: surplus gas discharge pipe
600: gas supply device
610: gas supply pipe

Claims (11)

A reaction tank (100) for growing the particle size by adding chemicals to the particulate pollutants and some dissolved pollutants contained in the incoming raw water;
A tubular outer tube 310 having an outer tubular outlet 311 at one side thereof and an inner tubular inlet 321 and an inner tubular tubular outlet 322 to which the effluent of the reaction tank 100 is supplied, And a side pipe (330) connected to the side wall of the outer pipe (310) at a predetermined angle with the outer pipe (310).
A floatation separating tank 410 having a hollow shape with an empty interior having a hopper 411 communicated with the sedimentation sludge discharge pipe 413 at a predetermined position on a sloping bottom surface, Liquid separator inlet pipe 421 through which the mixed fluid flows, and a treatment water outlet pipe 426 through which the treated water from which particulate matter is removed is connected to the other side of the solid-liquid separator inlet pipe 421, A first separating wall 422 positioned in a horizontal direction so as to prevent the inflow fluid from moving downward, a second separating wall 423 positioned in a vertical direction so that the inflow fluid can not move sideways, (422) so as to be discharged from the treated water outlet pipe (426) after moving the overflowed fluid from the bottom to the bottom of the treated water outlet pipe (423) The floating separation tank 4 A solid-liquid separator 420 located in the floating separator 410 having a third separating wall 424 formed with a curved portion 424 'having an end directed toward the outer side positioned in the vicinity of the bottom surface of the solid- A skimmer 430 for collecting floating particulate matter located at an upper portion of the solid-liquid separator 420, and a scraper 440 for guiding the sedimented particulate matter located under the solid-liquid separator 420 to the hopper 411 A floating separation device (400);
A gas-dissolving device body 510 of a closed structure in which the interior of the gas-dissolving-device body 510 is closed, an upper portion of the gas- The bottom surface and the top of the bottom of the gas dissolving apparatus body 510 are bent at a predetermined angle so that the bottom surface and the top of the bottom surface are bent at a predetermined angle and the circulation inducing projection 521 of the bottom- And a circulation induction pipe 530 located inside the gas-liquid reaction tank 520. The one side is connected to the sedimentation sludge discharge pipe 413 and the other side is connected to the inside of the gas-liquid reaction tank 520 And a nozzle 542 extending to an upper portion of the circulation induction pipe 530. The side surface of the nozzle 542 is connected to a gas supply pipe 610 to supply a gas mixture to the circulation induction pipe 530 540), and A gas dissolving water discharge pipe 550 provided at the center of the bottom surface of the gas dissolving apparatus body 510 for supplying a fluid having a sieve dissolved therein to the side pipe 330, reactor gas dissolution device (500) comprising a (100) one side of the excess gas discharge pipe 570 for connecting the upper part of the gas dissolution apparatus body 510 and the other end positioned below the reaction vessel 100 is supplied to the surface of the water in order to; And
And a gas supply device (600) connected to the gas supply pipe (610) for supplying gas to the gas-liquid mixing device (540).
delete The method according to claim 1,
Wherein the side tube (330) connected to the sidewall of the outer tube (310) is connected to the outer tube (310) at an angle of 0 ° to 90 ° with the incoming fluid.
delete delete delete delete The method of claim 3,
Liquid mixing device 540 is further provided with a gas inlet pipe 543 connected to the gas supply pipe 610. The gas inlet pipe 543 is connected to the sedimentation sludge introduced into the gas- To < RTI ID = 0.0 > 90. ≪ / RTI >
delete delete The method according to claim 1,
The third separating wall 424 includes a 3-1 separating wall 424-1, a 3-2 separating wall 424-2 located inside the 3-1 separating wall 424-1, And a third-third partition wall (424-3) located inside the third-second partition wall (424-2).

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