KR20180028626A - Flotation device using high efficiency tank for dissolving a gases into liquids - Google Patents

Abstract

The present invention relates to a flotation separation device using a highly efficient gas dissolving tank. More specifically, the flotation separation device using the gas dissolving tank comprises: a condensation tank configured to coarsen particles of a contamination material included in raw water; a flotation tank configured to receive condensation processing water, discharged from the condensation tank, to float and separate particle type materials; a gas dissolving unit configured to dissolve a gas in the processing water discharged from the flotation tank; a first bubble generating nozzle having a plurality of through holes formed therein wherein gas-contained circulation water, discharged from the gas dissolving unit, is injected into the floatation tank through the plurality of through holes; and a compressor configured to inject air into the gas dissolving unit. A partition wall having a predetermined height is installed at a predetermined location of a floatation tank inlet to raise mixed water of the condensation processing water and the gas-contained circulation water to a water surface portion of the flotation tank. The first bubble generating nozzle is located on a lower surface of the floatation tank between the floatation tank inlet and the partition wall.

Description

TECHNICAL FIELD [0001] The present invention relates to a flotation apparatus using a high-efficiency gas dissolving tank,

The present invention relates to a floating separation apparatus using a high-efficiency gas dissolving tank, and more particularly, to a floating separation apparatus using a high-efficiency gas dissolving tank which is capable of reducing the accumulation phenomenon of a scum layer in a float tank and easily dissolving a larger amount of air in circulating water in a gas- And more particularly, to a floating separation apparatus using a high-efficiency gas dissolving tank.

In general, flotation and separation apparatuses are widely used to treat sewage and wastewater, and the flotation method is a method of removing contaminants in the suspension by floating on the surface of water in the treatment of sewage and wastewater, Gravity type float method which can be applied only to oil such as small oil and flood type float method which is usually called float in water treatment technique can be categorized.

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.

For example, as described above, the floatation separation apparatus using the flood-type floatation method has a patent application filed and registered as 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.

In addition to the above disadvantages, most floating floats in the prior art use a scraper to move the scum layer. However, since the scarper is driven at a fixed time interval determined irrespective of the thickness of the scum layer, the running cost is increased, The water content of the scum layer is so high that the treatment cost is increased at the concentration and dehydration step.

Korean Patent Application No. 10-2008-0034902

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide an apparatus and a method for reducing the operation cost of a floating separation apparatus, And a method of operating such a device.

In order to attain the above object, according to the present invention, there is provided a floating separation apparatus using a gas dissolving tank, comprising: a flocculation tank that cools particles of contaminants contained in raw water; A gas bubble generating unit for generating a first bubble in which a plurality of through holes for injecting the gas containing circulating water flowing out from the gas dissolving unit into the floating tank are formed; A partition wall having a predetermined height so that the mixed water of the flocculation treated water and the gas-containing circulating water is raised to the vicinity of the flood control surface at a predetermined position on the floatation inlet side, and a compressor for injecting air into the gas dissolving unit, And the first bubble generating nozzle is located on the float bottom between the floating tank inlet side and the partition wall.

Here, the gas dissolving unit includes a gas dissolving tank having a predetermined shape, a liquid-liquid production container having an opening formed in the gas dissolving tank, a gas dissolving tank supply pipe for supplying the floating-treatment water provided on the gas dissolving tank, A gas dissolving tank discharge pipe provided at a lower side of the gas dissolving tank, and an air injection pipe provided at an upper side of the gas dissolving tank.

A bubble inducing member is further provided in the opening of the liquid-producing container, and a treatment water through-hole is formed in the center of the bubble inducing member to allow the floatation treatment water falling from the gas-dissolving tank supply pipe to pass therethrough, It is preferable that a large number of bubble dispersion holes are formed in the periphery to induce dispersion of the overflowing bubbles generated in the process water.

In addition, the floating separation apparatus using the gas dissolving tank according to the present invention is characterized in that a scum layer removal port for transferring the scum layer floating on the floatation mixed water to the outside is disposed on the floatation port side, It is preferable that the treatment water collecting section to be collected is arranged on the inner lower side of the floating tank.

The floatation separating apparatus using the gas dissolving tank according to the present invention may further comprise an air injection nozzle for moving floated scum layer, a scum layer position detector for measuring the height of floated scum layer, Wherein the air injection nozzle comprises at least one first air injection nozzle provided at the floatation inlet side for moving floated scum layer toward the scum layer removal port, And at least one air injection nozzle provided along both side surfaces of the floating tank for moving the spatulate removing member and / or the floating tank, wherein the scum layer position detecting unit checks whether the scum layer has reached the predetermined position of the floating tank At least one light emitting portion provided along the side surface of the floating collimator and disposed along the other side of the light emitting portion, It may further include on the receiving unit.

Here, the scum layer removal port is disposed near the scum layer transport wall which gradually increases toward the scum layer reservoir, and the scum layer transport wall is provided with at least one pressure sensor for measuring the pressure of the scum layer suspended above the mixed water And that the combustor removing opening is operated only when the measured value of the pressure sensor falls within a predetermined range or more.

Further, the floating separation apparatus using the gas dissolving tank according to the present invention may further include a second bubble generating nozzle between the floating type of barrier rib and the floating base water collecting unit, wherein the size of the bubble generated from the second bubble generating nozzle is Is larger than the size of the bubbles generated from the first air injection nozzle.

A method of operating a floating separation apparatus using a gas dissolving tank according to the present invention includes a first step of stirring raw water at a predetermined time and a stirring speed while injecting raw water and a flocculant into a flocculation tank using the floatation separation apparatus, A second step of supplying the flocculation treated water discharged from the tank to the floatation tank, supplying the gas-containing circulating water flowing out from the gas dissolving tank to the first bubble generating nozzle provided with the plurality of through holes provided in the floating tank, A third step of floating the particulate material contained in the float layer to the vicinity of the water surface, a fourth step of measuring with the float layer position detecting section whether the float reaches the predetermined position of the float tank, If it is within a predetermined range, the floatation nozzle of the float tank is operated to move the floated float to the middle of the floatation removing bowl and / or floatation tank Performing the fifth step, repeating the first to fourth steps if the predetermined range is not satisfied, the sixth step of measuring the pressure of the scum layer floating on the mixed water of the floating tank, and the sixth step And moving the scum layer to the scum layer reservoir by operating the scum layer removal port if the pressure of the scum layer falls within a predetermined range, and repeating the first to sixth steps if the scum layer is not within the predetermined range.

Since the floating separation apparatus according to the present invention includes the air injection nozzle for moving the floated scum layer and the control unit for controlling the same, the moving radius of the scum layer removal port can be remarkably reduced, which contributes to the reduction of the overall processing cost.

In addition, since the float separation apparatus of the present invention includes a plurality of pressure sensors on the scum layer transfer wall, moisture of the scum layer can be reduced, which can reduce the processing cost of the scum layer.

In addition, the floatation separation apparatus of the present invention is provided with a plurality of bubble generating nozzles in the float tank, so that it is possible to prevent sediment suspended in the vicinity of the water surface from sinking.

1 is a front view of a floating separation apparatus using a high-efficiency gas dissolving tank according to the present invention.
2 is a cross-sectional view taken along line A-A 'of the floating separation apparatus using the high-efficiency gas dissolving tank of FIG.
3 is an enlarged view of a scum layer transfer wall of the floating separation device using the high-efficiency gas dissolving tank of FIG.
FIG. 4 is an enlarged view of the level control unit of the floating separation apparatus using the high-efficiency gas dissolving tank of FIG. 1;
FIG. 5 is a cross-sectional view of an example of a gas dissolving tank applied to a floating separation apparatus using the high-efficiency gas dissolving tank of FIG. 1;
6 is a cross-sectional view of another example of a gas dissolving tank applied to a floating separation apparatus using a high-efficiency gas dissolving tank.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described herein are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention, so that there are various equivalents and modifications that can be substituted at the time of the present application It should be understood.

The raw water described in the specification of the present invention is defined as water to be treated containing various pollutants including turbidity components and coagulated water as water which is stirred for a predetermined time and agitation strength after injecting coagulant into raw water, In the tank, the scum layer is defined as separated water. The gas-containing circulating water is defined as water dissolving the gas in the treated water, and the mixed water is defined as the water mixed with the gas-containing circulating water and the flocculation treatment water.

 Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, with reference to the accompanying drawings.

FIG. 1 is a front view of a floating separation apparatus using a high-efficiency gas dissolving tank according to the present invention, FIG. 2 is a sectional view taken along line A-A 'of FIG. 1, The flotation tank 200, the treated water circulation pump 300, the gas dissolving unit 400, and the compressor 500. The flocculation tank 100 includes a flotation tank 200,

The flocculation tank 100 is a reaction tank for injecting and stirring a flocculant for the purpose of coarsening particles of various pollutants contained in raw water. Here, the flocculant to be injected into the flocculation tank 100 is not particularly limited as long as it is a flocculant commonly used in the water treatment field. For example, it may be an iron flocculant, an aluminum flocculant and / or a polymer flocculant.

The float tank 200 is a reaction tank for flocculating and separating the particulate matter supplied from the flocculation treatment water discharged from the flocculation tank 100. The reaction tank 200 has a partition 211 having a predetermined volume and a substantially rectangular- A water level adjusting unit 230, a scum layer removing unit 240, a scum layer storage tank 250, a bubble generating nozzle 260, an air jet nozzle 270 And a scum position detecting unit 280. [0033]

As shown in FIG. 1, the partition 211 is provided in the vicinity of the inlet side of the floatation tank main body 210 into which the flocculation treatment water flows, and the suspended material contained in the mixed water is guided to easily float near the water surface .

It is preferable that at least one bubble generating nozzle is installed at the bottom of the floating tank main body 210. The first bubble generating nozzle 261 provided at the bottom between the inlet side of the floating tank main body 210 and the partition 211 and having a plurality of through holes (not shown) Containing circulating water to the flotation tank main body 210. At this time, the bubbles contained in the gas-containing circulating water react with the suspended substances of the flocculating treated water and float to the vicinity of the water without going to the bottom.

Here, the size of the bubble generated from the first bubble generating nozzle 261 is preferably as small as possible. More specifically, since the suspended substances contained in the coagulation treatment water tend to settle to the bottom, it is preferable to generate as many small bubbles as possible to adhere to the surface of the suspended material in order to float to the vicinity of the water surface.

On the other hand, in the case of a float tank operated in general, some suspended particles floating near the water surface may settle again near the floating float due to the water flow or impact transmitted when the float removal port moves. In the present invention, one or more bubble generating nozzles 262 and 263 are further disposed between the partition 211 and the flotation treatment water collecting unit 220 in order to minimize operational problems occurring in the conventional flotation tank .

2, the second bubble generating nozzle 262 and the third bubble generating nozzle 263 can be provided, wherein the size of the bubble generated from the second bubble generating nozzle 262 is the same as that of the above- It is preferable that the size of the bubbles generated from the first bubble generating nozzle 262 is larger than the size of the bubbles generated from the first bubble generating nozzle 262 Do.

The reason why large bubbles are generated toward the discharge port side of the floating tank main body 210 is that the suspended particle particles floating on the discharge port side are larger than the inlet side of the floating tank main body 210, This is because large bubbles are advantageous in order to prevent them from disappearing.

The suspended material contained in the mixed water is transported to the scum layer storage tank 250 by a scum layer removal port 240 disposed at the outlet side of the floating tank 210 after forming a scum layer near the water surface, The treated water from which the suspended material has been removed is partially discharged to the outside through a treated water collecting unit 220 having a plurality of treated water collecting holes 221 disposed at the lower side of the floating tank 210 and an outlet 222, And the rest is supplied to the gas dissolving unit 400 again.

Meanwhile, the floatation separation apparatus of the present invention further includes a plurality of air injection nozzles 270, a scum detection unit 280, and a control unit (not shown) for controlling the operation of the floatation scatters.

Conventionally, since the flotation tank is relied on only a scum layer removal device which removes the scum layer or continuously moves the collection device at a predetermined time interval, the power ratio required for driving the scum layer removal device increases, which increases the overall processing cost come.

In order to solve this problem, in the present invention, the first air injection nozzle 271, the second air injection nozzle 272, the third air injection nozzle 273, and the fourth air And an injection nozzle 274.

2, the first air injection nozzle 271 located at the inlet side of the floating tank main body 210 moves the floated scum toward the outlet of the scum layer removal port 240 or the floating tank main body 210 The second air injection nozzle 272, the third air injection nozzle 273 and the fourth air injection nozzle 274 provided along the both side surfaces of the floating tank main body 210 are disposed in the middle of the floating tank 200, And / or the scum removing port 240 side.

These air injection nozzles 270 are controlled by a control unit (not shown) according to the resultant value transmitted from the scum detection unit 280 for measuring the height of the scum layer.

That is, a first light emitting portion 281, a second light emitting portion 282, and a third light emitting portion 283 for irradiating light are provided at predetermined positions on one side of the floating tank main body 210, A first receiving unit 281-1, a second receiving unit 282-1, and a third receiving unit 283-1 for determining whether light emitted from each light emitting unit has arrived. Therefore, it is possible to easily confirm whether or not the scum layer has reached the position where each light emitting portion and the receiving portion are disposed. For example, if the light emitted from the first light emitting portion 281 does not reach the first receiving portion 281-1, it is recognized that a scum layer has been formed up to the position where the first light emitting portion 281 is installed, When the light is received by the first receiving unit 281-1, it is determined that the scum layer is not formed sufficiently and the air injection nozzle 270 is not operated.

2, the light emitting unit and the receiving unit are disposed along both side surfaces of the float bath main body 210. However, it is also possible to have two or more light emitting units and a receiving unit along the vertical direction in which the scum layer is formed have.

As described above, the flotation apparatus of the present invention includes at least one air injection nozzle 270 for moving floated scum layer, a scum layer position detection unit 280, and a control unit (not shown) for controlling them , The moving radius of the screw layer removing tool 240 can be remarkably reduced, which can contribute to a reduction in the overall processing cost.

3 is an enlarged view of a scum layer transfer wall of the floating separation device of the present invention. As shown in FIG. 3, in the present invention, at least one pressure sensor 215 is further provided at the scum layer transport wall 214, which gradually increases toward the side of the scum layer storage tank 240.

As described above, the conventional float bath continuously removes the scum layer irrespective of the thickness of the scum layer, and even if the scum layer is formed thick, water is often contained excessively. Therefore, the water content of the scum layer collected in the scum layer reservoir is not constant or contains a large amount of water, and consequently, the cost of concentrating and dewatering the collected scum layer is increased.

In the present invention, at least one pressure sensor 215 is further provided on the scum layer conveying wall 214 so as to sufficiently remove moisture from the scum layer in the float bath main body 210 and then transfer it to the scum layer reservoir 250.

3, the first pressure sensor 215-1, the second pressure sensor 215-2 and the third pressure sensor 215-3 are provided. However, if necessary, the number of installed sensors It can be said that it is possible to increase or decrease.

When the pressure value measured by the first pressure sensor 215-1 is equal to or greater than a predetermined value, it is determined that the water in the scum layer has been sufficiently removed. And the com- partment layer removal tool 240 is driven to be transported to the scum layer storage tank 250. However, if the measured value of the second pressure sensor 215-2 does not fall within the predetermined range even if the scale layer is formed thick and reaches the second pressure sensor 215-2, The removal tool 240 is not driven.

On the other hand, the water content of the scum layer can be achieved by adjusting the water level of the mixed water. FIG. 4 is an enlarged view of the water level adjusting unit of the flotation separating apparatus. The treated water conveying pipe 223 is in communication with the treated water collecting unit 200 located inside the floating tank 200, And a lid part 231 coupled to the lid part support shaft 232 is located at the upper part and the lid part support shaft 232 is moved up and down by the support shaft moving part 233.

Therefore, when the level of the floating tank 200 is to be increased, in order to increase the discharge amount of the treated water discharged to the treated water conveyance pipe 233 by moving the lid part 231 upward and conversely to lower the water level The level of the floating tank 200 can be adjusted by moving the lid part 231 downward to reduce the discharge amount.

On the other hand, when the level of the floating tank 200 is lowered, the thickness of the scum layer can be kept large. On the contrary, if the floatation height of the floatation tank 200 is increased, the thickness of the scum layer becomes thinner. It is advantageous to lower the level of the floating tank 200. However, if the level of the floating tank 200 is kept low at all times, the reaction space is reduced to such a degree that the suspension material does not float well or the treatment capacity is reduced.

In the present invention, the first pressure sensor 215-1, the second pressure sensor 215-2 and the third pressure sensor 215-3 are provided to adjust the water level according to the water content of the scum layer It is possible.

For example, if the measured value of the third pressure sensor 215-3 disposed at the highest position of the scum layer transfer wall 214 does not fall within the predetermined range, the level of the floating tank 200 is kept low It is possible to lower the moisture content of the glass layer.

A part of the treated water from which the suspended substance is removed is supplied to the dissolving unit 400 through the treated water collecting unit 220 and the treated water circulating pump 300 disposed inside the floating tank 200.

FIG. 5 is a cross-sectional view of an example of a gas dissolving tank applied to a floating separation apparatus using the high-efficiency gas dissolving tank of FIG. 1;

The gas dissolving unit 400 includes a gas dissolving tank 410 having a predetermined shape and a liquid forming container 420 having a cavity formed in the gas dissolving tank 410 and having an opening at an upper portion thereof.

A gas dissolving tank supply pipe 430 for supplying the floating tank 200 treated water to the upper side of the gas dissolving tank 410; a gas dissolving tank discharge pipe 440 and a gas dissolving tank 410 An air injection pipe 450 is further provided at an upper portion of the side surface.

The gas dissolving unit 400 having the above construction supplies the gas-containing circulating water in which air is supersaturated to the first bubble generating nozzle 261 to the third bubble generating nozzle 263 of the floating tank main body 210 It is possible. That is, a part of the treated water in the flotation tank main body 210 is transferred to the liquid production container 420 in the gas dissolution tank 410 by the treatment water circulation pump 300, and the compressed air is supplied to the compressor 500 And is introduced into the gas dissolving tank 410. Therefore, the gas-dissolved water in the gas-dissolving tank 410 is discharged by the air pressure in the gas-dissolving tank 410 so that air is supersaturated in the gas-dissolving tank 410, 261 to the third bubble generating nozzle 263.

6 is a cross-sectional view of another example of the gas dissolving tank applied to the floating separation apparatus using the high-efficiency gas dissolving tank. The bubble inducing member 421 is further provided in the opening of the liquid-

The bubble inducing member 421 is provided at the center thereof with a treatment water through hole 421-1 for passing the floating tank 200 treatment water falling from the gas dissolution tank supply pipe 430, 421-1 are provided with a large number of bubble dispersion holes 421-2 for dispersing and inducing the overflowing bubbles generated in the process water. According to the gas dissolving tank 400 including the bubble inducing member 421 as described above, the bubble rising toward the opening of the liquid forming container 420 due to the bubble inducing member 421 is injected from the nozzle 431, The bubbles that overflow through the bubble dispersion holes 421-2 of the bubble inducing member 421 are maintained for a longer period of time to be treated with the treated water in the gas dissolution tank 410 A large amount of air can be dissolved.

Hereinafter, a method of operating the floating separation apparatus using the gas dissolving tank according to the present invention will be described.

In the above-described method of operating the floating separation apparatus using the gas dissolving tank, raw water and coagulant are first injected into the flocculation tank 100, and the first step of stirring raw water at a predetermined time and stirring speed is performed.

Next, while performing the second step of supplying the flocculation treatment water discharged from the flocculation tank 100 to the floatation tank 200, the gas-containing circulating water flowing out from the gas dissolving unit 400 is introduced into the floating tank body 210 to the first bubble generating nozzle 261 in which a plurality of through holes are formed to float the particulate matter contained in the coagulation treatment water to the vicinity of the water surface.

Further, while performing the above and the above steps continuously, the scale layer is measured (step 4) by the scum layer position detector 280 to see whether the scum layer reaches the predetermined position of the float main body 210 intermittently or continuously, When the measured values of the four-level scum layer position detection unit 280 fall within a predetermined range, the air spray nozzles of the floating tank main body 210 are operated to move the floated scum layer to the scum layer removal port 240 and / (200). If the measured value of the scum layer position detector 280 in the fourth step does not fall within the predetermined range, the first to fourth steps are repeated.

Next, the sixth step of measuring the pressure of the scum layer floating on the mixed water of the floating tank main body 210 is performed. If the scum layer pressure in the sixth step is within the predetermined range, To move the scum layer to the scum layer storage tank 250, and repeating the first to sixth steps if the scum layer is not within the predetermined range.

If the squirting pressure of the sixth step does not fall within the predetermined range, the first to fifth steps are repeated.

It is obvious to those skilled in the art that the above-mentioned first to sixth steps are merely divided into steps for easy understanding, but are not necessarily performed sequentially.

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: Coagulation tank
200: Flotation tank
210: Floating tank body
211:
212: treated water storage tank 213: scum layered storage wall
214: scum layer transfer wall 215: pressure sensor
215-1: first pressure sensor 215-2: second pressure sensor
215-3: Third pressure sensor
220: treated water collecting section
221: treated water collection port 222: treated water discharge port
223: Process water conveying pipe
230:
231: lid part 232: lid part supporting shaft
233: support shaft moving means
240:
250: Split layer reservoir
260: bubble generating nozzle
261: first bubble generating nozzle 262: second bubble generating nozzle
263: Third bubble generating nozzle
270: air jet nozzle
271: first air injection nozzle 272: second air injection nozzle
273: Third air injection nozzle 274: Fourth air injection nozzle
280: scum layer position detector
281: first light emitting portion 281-1: first receiving portion
282: second light emitting portion 282-1: second receiving portion
283: third light emitting portion 283-1: third receiving portion
300: process water circulation pump
400: Gas dissection
410: Gas dissolving tank
420: vacuo producing vessel
421: bubble inducing member
421-1: treated water through hole 421-2: bubble dispersion hole
430: Gas dissolving tank supply pipe
431: treated water supply nozzle
440: Gas dissolving tank discharge pipe
450: air inlet tube
500: Compressor

Claims (6)

A flocculating tank for concentrating the contaminant particles contained in the raw water;
A float tank for flocculating and separating the particulate matter by receiving the flocculation treatment water discharged from the flocculation tank;
A gas-liquid dissolution tank having a predetermined shape for dissolving the gas in the treatment water flowing out of the floating tank, a liquid-liquid production vessel having a mouthpiece provided in the gas dissolving tank, and a floatation treatment water provided above the gas- A gas dissolving tank discharge pipe provided at a lower side of the gas dissolving tank, and an air injection pipe provided at an upper side of the gas dissolving tank;
A first bubble generating nozzle positioned at a floatation inlet side where a plurality of through holes for injecting gas-containing circulating water flowing out from the gas dissolving unit into the floating tank are formed and a floatation bottom surface between the partition walls;
A partition wall provided at a predetermined position on the floatation inlet side having a predetermined height so that the mixed water of the flocculation treatment water and the gas-containing circulating water is raised near the floatation surface; And
And a compressor for injecting air into the gas dissolving portion,
Wherein a bubble inducing member is further provided in the opening of the liquid-producing vessel, and a treatment water through hole is formed in the center of the bubble inducing member to allow the floatation treatment water falling from the gas dissolving tank supply pipe to pass therethrough, Wherein a plurality of bubble dispersion holes are formed in the treatment water to disperse and induce overflowing bubbles.
The method according to claim 1,
Characterized in that a scum layer removal port for transferring the scum layer floating to the upper part of the mixed water of the floating tank is disposed on the floatation port side and a treated water collecting section for collecting the treated water of the floatation tank is disposed inside the floating tank Wherein the gas dissolving tank is made of a metal.
3. The method of claim 2,
Wherein the floatation vessel comprises an air injection nozzle for moving floating floats;
A scum layer position detector for measuring the height of the floated scum layer; And
And a control unit for controlling the air injection nozzle based on the result of the scum layer position detection unit,
Wherein the air injection nozzle comprises at least one first air injection nozzle provided on the side of the floatation inlet for moving floated scum layer toward the scum layer removal port and at least one first air injection nozzle for moving the floated scum layer into the scum layer removal port and / And one or more air jet nozzles provided along the side surface of the float to be moved,
The scum layer position detection unit may include at least one light emitting unit provided along a floating surface side to confirm whether a scum layer has reached a predetermined position of the floatation tank, Wherein the gas-liquid separator includes at least one receiving portion provided in the gas-liquid separator.
The method of claim 3,
Further comprising a second bubble generating nozzle between the floating type of barrier rib and the floating base water collecting unit,
Wherein the size of the bubbles generated from the second bubbling nozzle is larger than the size of the bubbles generated from the first air injection nozzle.
5. The method of claim 4,
Wherein the scum layer removal port is disposed near the scum layer transport wall gradually increasing toward the scum layer reservoir, wherein the scum layer transport wall is provided with one or more pressure sensors for measuring the pressure of the scum layer floating on the mixed water, Wherein the combustor removing port is operated only when the measured value of the pressure sensor is equal to or greater than a predetermined range.
A method for operating a floating separation apparatus using the gas dissolving tank according to any one of claims 1 to 5,
A first step of stirring the raw water with a predetermined time and a stirring speed while injecting raw water and coagulant into the flocculation tank;
A second step of supplying the flocculation treated water discharged from the flocculation tank to the flotation tank;
A third step of supplying gas-containing circulating water flowing out of the gas dissolving section to a first bubble generating nozzle provided with a plurality of through holes provided in the floating tank to float the particulate matter contained in the coagulation treatment water to the vicinity of the water surface;
A fourth step of measuring with a scum layer position detecting unit whether a scum layer reaches a predetermined position of the float tank;
If the measured value of the squirt layer position detection unit in the fourth step falls within a predetermined range, a fifth step of moving the floated scum layer by operating the floatation nozzle of the floatation tank to the middle of the scum layer removal port and / or floating bed Repeating the first to fourth steps if the predetermined range is not satisfied;
A sixth step of measuring the pressure of the scum layer floating on the mixed water of the floating tank; And
If the pressure of the scum layer in the sixth step falls within a predetermined range, the scum layer removal port is operated to move the scum layer to the scum layer storage tank, and if the pressure falls outside the predetermined range, repeating the first to sixth steps Wherein the gas-liquid separator is a gas-liquid separator.

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