KR101761246B1 - Dissolved air flotation apparatus having level control type floating tank - Google Patents

Abstract

The present invention relates to a pressurized floating apparatus for water treatment for separating suspended solids and surfactants from water in raw water containing suspended solids or surfactants in emulsion or suspension state The present invention relates to a flotation apparatus comprising: a cylindrical floating separator for circulating and flowing raw water (raw water) to separate additives mixed in raw water according to specific gravity difference; A raw water inflow pipe provided in an oblique direction with respect to the central axis of the floating separation tank to supply raw water so that the raw water flows; A scum discharge pipe having an upper opening vertically downwardly in the center of the floating separation chamber and separating and discharging the scum separated from the raw water; A discharge pipe provided at a lower end of the floating separation tank for discharging the treated water from which the scum is separated to the outside; A water level sensor for measuring the level of raw water in the floating separation tank; A flow rate regulating means for regulating a raw water amount in the floating separation tank; And a control unit for controlling the adjusting means to adjust the amount of raw water in the floating separation tank. According to the present invention, the water level in the floating separator during the operation of the apparatus is alternately placed at a level higher or lower than the inlet of the scum outlet pipe for a predetermined time, And there is an effect that the release is performed intermittently after being concentrated on the surface.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a floating type float-

The present invention relates to a solid-liquid separating apparatus used in a water treatment process, and more particularly, to a solid-liquid separating apparatus used in a water treatment process, in which suspended solids and surfactant components in raw water containing an emulsion or suspended state or a surfactant To a structure of a pressurized floating apparatus for water treatment for separating water from water.

In the water treatment process, it is general that at least one of the sedimentation, floatation or filtration methods is applied to the separation of the suspended substances contained in the raw water.

Among them, flotation separation is a method of separating floating substances floating on the water surface by relatively low specific gravity and raising the surface of the flotation water. As a result, researches on the flotation separation method using micro air pellets dispersed in water have progressed steadily, The so-called 'dissolved air flotation', in which the amount of air dissolved is increased and then the pressure is reduced to produce fine bubbles, has become one of the typical solid-liquid separation techniques. This pressurized flotation method can float not only a substance having a specific gravity lower than that of water but also a substance having a specific gravity larger than that of water, together with microbubble particles, and usually takes 0.5 to 1 hour for treatment. Therefore, . Korean Patent Registration Nos. 10-0882200 and 10-1639414 disclose a floating separator for pressurized floating, which has a cylindrical shape and has a structure capable of receiving water containing a suspended material to be treated and forming a swirling flow therein, A float material separating function for adsorbing and floating the floating material in the minute bubbles in the process of passing the water to be treated through the inside of the floating separator and discharging the discharged water to the outside through the discharge pipe provided in the center part, .

However, the floatation-type floatation apparatuses according to the above-mentioned applications have a problem in that float substances (hereinafter, referred to as 'scum') floating together with the microcavities spontaneously gather from the water surface of the upper part of the cylindrical floating- And a drainage amount control plate interlocked with the level detection device in the flotation separation tank is installed to design a water level control valve for stabilizing the overflow of the scum. There is a problem in that it is difficult to control.

That is, when the level of the water level in the floating separation tank is not correct, the scum on the water surface can not be overflowed (if the water level is lowered), or the scum containing a large amount of water is discharged on the overflow The total amount of the target scum is excessively generated (when the water level is adjusted to a high level), the operation of the apparatus is caused.

Korean Patent No. 10-1639414 Korean Patent No. 10-0882200

SUMMARY OF THE INVENTION It is an object of the present invention to provide a float type float type float type float type float type float type float type float type float type float type float type float type float type float type float type float type float type float type float type float type float type float type flocculent type flocculent type flocculent type flocculent type flocculent type flocculent type flocculent type flocculated type, It is possible to overcome the problem of the operation of the apparatus in which the scum containing the large amount of water is discharged over the surface of the apparatus and to discharge the scum to the central discharge pipe with high reliability even if the water level in the float separation tank is not precisely adjusted And a control system for scum discharging that can minimize the amount of water that is discharged along with the scum.

According to an aspect of the present invention, there is provided a water purifier comprising: a cylindrical floating separator for circulating and flowing raw water to separate additives mixed in raw water according to specific gravity difference; A raw water inflow pipe provided in an oblique direction with respect to the central axis of the floating separation tank to supply raw water so that the raw water flows; A scum discharge pipe having an upper opening vertically downwardly in the center of the floating separation chamber and separating and discharging the scum separated from the raw water; A discharge pipe provided at a lower end of the floating separation tank for discharging the treated water from which the scum is separated to the outside; A water level sensor for measuring the level of raw water in the floating separation tank; A flow rate regulating means for regulating a raw water amount in the floating separation tank; And a control unit for controlling the adjusting means to adjust the amount of raw water in the floating separation tank.

And the control unit includes: a timer for counting a periodic time according to the set time; A receiving module receiving a measured value of the level sensor; A controller for controlling the flow rate adjusting means according to the set time to control a flow rate in the floating separation tank; And a storage unit for storing the flow rate value according to the set period and the set time.

Also, the flow rate control means may include a raw water control valve provided in the raw water inflow pipe to regulate the amount of raw water flowing into the floating separation tank; And a treatment water control valve provided in the discharge pipe to adjust the treatment water discharged from the floating separation tank.

The control unit may control the opening / closing amount of the raw water control valve so that the level of the raw water in the floating separation tank is maintained for each measured time of the timer.

The control unit may control the opening and closing amount of the treatment water control valve so that the water level in the floating separation tank is maintained for each measured time of the timer.

The present invention further comprises a raw water supply unit for supplying raw water to be treated through the raw water inflow pipe: the raw water supply unit comprises: a fine bubble producing unit for forming fine bubbles by mixing air and water; And a flocculation reaction tank for mixing a flocculant liquid and a flocculant liquid.

The apparatus may further comprise a weight measuring device for measuring the weight of raw water in the floating separation tank.

The control unit may further comprise an operation unit for calculating a squirt amount from the measurement value received from the water level sensor and the weight measuring instrument.

The control unit may control the treatment water control valve to reduce the amount of treated water discharged in the floating separation tank and increase the scum discharge amount when the scum amount calculated from the calculation unit is equal to or larger than the reference value.

And the control unit adjusts the treatment water control valve to increase the amount of treated water discharged from the floating separation tank when the scum amount calculated from the calculation unit is less than the reference value and the raw water level received from the water level sensor is equal to or larger than the set value .

The control unit controls the treatment water control valve so that the amount of treated water discharged from the floating separation tank is adjusted to a predetermined value when the scum amount calculated from the calculation unit is equal to or greater than a reference value and the raw water level received from the level sensor is less than a set value .

The control unit controls the raw water control valve to increase the flow rate of the raw water in the floating separation tank when the scum amount calculated from the calculation unit is less than the reference value and the raw water level received from the level sensor is less than the set value, You may.

Meanwhile, the raw water inflow pipe may include a regulating vane provided in the floating separator connecting portion to regulate the inflow angle of the raw water; And a vane roller for adjusting a rotation angle of the adjusting vane.

In addition, the control unit may control the vane controller according to the amount of the scram, and adjust the inflow angle of the raw water to adjust the raw water turning speed in the floating separator.

The control unit may control the vane controller to increase the raw water revolution speed in the floating separation tank as the scum amount increases.

The following effects can be expected in the swing type pressurized floating apparatus provided with the level control type float separation tank according to the present invention as described above.

That is, in the present invention, by providing a water level adjustment system capable of setting a program so that the water level in the float separation tank can be repeatedly raised and lowered periodically, the water level in the float separation tank during operation of the device So that the scum floated is collectively concentrated on the water surface of the floatation separating tank and then discharged intermittently so as to prevent the overflow of the scum flowing out of the scum, The water in the scum drain pipe can be prevented from being continuously discharged to the scum drain pipe together with the scum, thereby ensuring stable operation of the push type floatation apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary view showing the configuration of a specific embodiment of a swing type pressurized floating apparatus provided with a water level float separation tank according to the present invention; FIG.
2 is an exemplary view showing a configuration and an operation mode of a floating separation tank constituting a specific embodiment of the present invention.
3 is an exemplary view showing a configuration of a microbubble generator constituting a specific embodiment of the present invention.
4 is an exemplary view showing a configuration of a vane and a vane controller constituting a specific embodiment of the present invention.
5 is a block diagram illustrating an embodiment of a control unit that constitutes a specific embodiment of the present invention;
6 is a flow chart showing an embodiment of a control method of a control unit constituting a specific embodiment of the present invention.

The swing type pressurized and floating apparatus provided with the level control type floatation separation tank according to the present invention is a purification processing apparatus for removing suspended substances in water such as water, seawater, wastewater, and process water. An example is given.

FIG. 1 is a view showing a configuration of a specific embodiment of a swing type pressurized and floating type flotage apparatus provided with a water level control type flotation separation tank according to the present invention, FIG. 2 is a view showing the configuration and operation of a floating type flotage unit constituting a specific embodiment of the present invention Fig. 3 is an exemplary view showing a configuration of a micro-bubble generator constituting a specific embodiment of the present invention, Fig. 4 is a view showing a configuration of a vane and a vane controller constituting a specific embodiment of the present invention FIG. 5 is a block diagram showing an embodiment of a control unit constituting a specific embodiment of the present invention, and FIG. 6 is a flowchart illustrating a control method of a control unit constituting a specific embodiment of the present invention 1 is a flow chart illustrating an embodiment.

As shown in FIG. 1, a spin-type pressurized floating apparatus provided with a float-type floatation separator according to the present invention includes a float separation tank 100, a micro-foam forming unit 600, a control unit 700) and a raw water supply unit 500.

1 and 2, the raw water in which the microbubbles are mixed is introduced into the cylindrical floatation separator 100 (FIG. 1) through the raw water inlet 200, .

At this time, a swirling flow is formed inside the floating separation tank 100 by the action force of the raw milk inflow inlet 200 which is biased in the tangential direction on the side surface of the floating separation tank 100.

Thereafter, the suspended solids in the water are adsorbed by the minute bubbles and form a swirling upward flow outward from the inside of the floating separation tank 100, and rise at the same time as the swirling.

At this time, the floating substances adsorbed on the microbubbles move on the float scum path that floats to the surface of the water and then swings and collects at the rotation center, and flows into the scum discharge pipe 110) and is discharged to the outside.

The treated water that floats together with the bubbles and the suspended material has been removed forms a whirling descent stream toward the inside of the floating separation tank 100 and descends at the same time as turning, and is continuously discharged to the outside through the lower treated water discharge pipe 300 .

Meanwhile, during the operation of the rotary type pressurized and floating apparatus according to the preferred embodiment of the present invention, the flow rate of the treated water is basically controlled by adjusting the treatment water control valve 310 to adjust the water level in the floatation tank 100 , Thereby controlling the amount of scum emissions including overflowing water.

The float separator 100 is provided with a water level sensor 410 at a predetermined position so that the control unit 700 controls the operation of the rotary type floatation device 410 using the measured value of the water level sensor 410 .

The control embodiments of the swing type pressurized floating apparatus by the control unit 700 will be described later in detail.

On the other hand, the particles having a large specific gravity which can not be removed by floatation of the sludge or the like introduced into the floating separation tank 100 move toward the wall by the centrifugal force in accordance with the swirling flow in the floating separation tank 100, The amount of the water to be discharged together with the water can be adjusted continuously or intermittently by operating the sediment discharge pipe flow rate regulating means 130.

The raw milk inflow inlet 200 may include a raw water control valve 210 for controlling the inflow amount of raw water.

That is, in this case, it is possible to adjust the water level in the floatation separation vessel 100 by controlling the discharge amount of the treated water, or to control the water level in the floatation separation vessel 100 by controlling the inflow amount of the inflow water. The differences and effects of these adjustments will be discussed later.

Meanwhile, the process water control valve 310 and the raw water control valve 210 may be a gate valve, a ball valve, a grove valve, or the like, and may be operated by an air pressure or an electric motor.

The sediment discharge pipe flow rate regulating means 130 may be a gate valve, a ball valve, a grab valve, or the like, and may be automatically operated by an air pressure or an electric motor, In a minor case, installation may be omitted.

The level sensor 410 may be a pressure sensing device, a distance measuring device using ultrasonic waves or a laser, or the like.

In the float separation tank 100 according to the present invention, a weighing instrument 420 may be provided. The weight measurer 420 measures the weight of the fluid (raw water + scum) in the floatation separation tank 100 and can be applied to various conventional pressure gauges. The weight of the entire floating type floatation vessel 100 And calculate the weight of the fluid in the floating separator by subtracting the weight of the fixed floating separator 100 from the weight of the floating separator.

1, the raw water supply unit 500 includes raw water supply means such as a centrifugal pump, a flocculation liquid reservoir 510, a flocculant liquid supply pump 530, a flocculation reaction tank 510, For example, as shown in FIG.

At this time, two or more chemical solutions may be used at the same time depending on the object to be treated, and the flocculation tank may be adopted as a two or more step process.

Generally, in the flocculation reaction tank 510, an agitation device using an electric motor is provided to enhance the effect of flocculation reaction. The flocculation tank 510 may be formed into a pipe having a relatively long length so as to perform a flocculation function by turbulence generated in the pipe during transportation.

Preferably, the raw water supply means is provided with a device capable of controlling the flow rate by the voltage of the electric power supplied to the drive motor, the frequency of the electric power source, the operation of the valve, or the like.

Hereinafter, with reference to FIG. 3, the structure of the microbubble generator constituting the preferred embodiment of the present invention will be described in detail.

3, the micro-bubble generator 600 includes an air intake pipe 640, an intake air flow rate regulating plate 690, an electric pump 650, a pressure-resistant pipe 660, and a pressure regulating plate 680 And is connected to and connected to the treatment water circulation pipe 620.

The electric pump 650 may be a centrifugal pump and it is preferable to use a friction pump or the like particularly in order to prevent cavitation even when air is sucked. And the air suction pipe 640 is sucked into the electric pump 650, the air is pressurized with a strong agitating force, and the air is broken into fine particles and dissolved in the water.

The mixture of water and air passes through a pressure-resistant pipe 660 provided with a porous partition plate 670 and is supplied to the raw milk inflow pipe 200 after the solubility of air is further increased.

The fine bubble generator 600 may include a pressure regulating plate 680 such as a ball valve or a gate valve by increasing the pressure inside the pressure tube 660 to a predetermined level to increase the solubility of air in the fine grabber And a larger amount of fine bubbles are generated at the time of decompression.

The air intake pipe 640 is preferably provided with an orifice-shaped end bent to have a thin end and to coincide with a flow direction of the fluid for stable supply of the inflow air.

The pressure inside the pressure-resistant pipe 660 is preferably maintained in the range of 3 to 7 bar. Although it is not shown in the figure, it is possible to accurately grasp the operating pressure condition of the device by attaching a pressure gauge in the pressure- But it is desirable to be able to adjust it arbitrarily.

Further, an air flow meter for grasping the amount of air sucked into the electric pump 650 may be provided on the air suction pipe 640.

4, at the end of the raw milk inflow inlet 200, a vane 220 capable of controlling the flow direction of raw water and a vane controller 220 for controlling the rotation of the vane, (230).

That is, the amount of turning of the raw water is determined by the angle of installation of the raw milk inflow inlet 200 and the flow rate of raw water. Since the installation angle of the raw milk inflow inlet 200 is fixed, So that the inflow angle of the raw water can be adjusted.

Accordingly, in another embodiment of the present invention, the control unit 700 can control the treatment efficiency of the raw water by adjusting the amount of turning of the raw water through the vane controller 230.

The process for removing suspended solids in the swing type pressurized and floating apparatus according to the present invention can be summarized as follows. The raw liquid to be treated is continuously collected and transferred using raw water supply means such as a pump, Called flocculant, and then supplied to the floating separation tank 100 through the piping, and at the same time, the microbubbles supplied from the microbubble generator 600 And the mixed liquid enters the floating separation tank 100. The mixed liquid is separated into floating scum and treated water in the course of swirling and ascending in the floating separation tank 100, The scum discharging pipe 110 disposed at the center of the tank 100 flows over and is discharged to the outside.

Hereinafter, a configuration and a control method of a control unit for maximizing the efficiency of removing suspended solids in a water-based pressurized floating apparatus according to the present invention will be described in detail.

The control unit of the rotary type pressurized floating apparatus according to the present invention can largely improve the removal efficiency of suspended solids through the three-way control.

First, the control method is a control method in which the control unit raises and lowers the level of the raw water in the floating separation tank according to a previously stored time period, thereby improving the scum removing efficiency.

Second, a control method for controlling the flow rate of raw water and the discharge amount of treated water by calculating a raw water level and a squeegee in the floating separation tank, and controlling the scam removal efficiency by the control unit in a scouring control system;

Finally, a control method for controlling the amount of scum in the floating separator by controlling the inflow direction of the raw water and changing the amount of turning of the raw water, to be.

Needless to say, these control methods do not have to be applied independently, but the control methods may be implemented in parallel in order to maximize the processing efficiency.

5, the control unit 700 of the rotary type floatation apparatus according to the present invention includes a receiving module 710, a controller 720, a timer 730, an operation unit (not shown) 740 and a storage unit 750.

The receiving module 710 may measure the level measured in the floatation separator 100 and / or the measured fluid weight in the floating separator 100 measured by the weight measurer 420, And may be configured to include various data receiving interfaces of a wire / wireless communication method.

The controller 720 controls the process water control valve 310, the raw water control valve 210 and the vane controller 230 to control the discharge amount of the treated water, the inflow amount of the raw water, and the inflow direction of the raw water .

Meanwhile, the timer 730 counts the elapsed time in controlling the frequency control method by the control unit 700 so that the water level in the floatation separator 100 can be adjusted to the water level set at the corresponding time .

The calculating unit 740 calculates the amount of the spark in the floating separator 100. Specifically, the calculating unit 740 calculates a sum of the measured value received from the level sensor 410 and the weight value received from the weight measuring instrument 420, And calculates the amount of scrubbing in the floating separator (100).

That is, by using the difference in specific gravity between the raw water and the scum, if the estimated weight when the entire water level according to the water level measurement value is filled with the raw water is compared with the actual weight measurement value, the relative scum inclusion ratio is roughly calculated .

Meanwhile, the storage unit 750 stores a time period as a reference for driving the control unit 700, a water level for the time period, a set value for the water level, a reference value for the spray amount, The same stored value is configured so that it can be modified / updated according to the operator's choice.

Hereinafter, each control method of the control unit having the above-described structure will be described in detail.

First, the frequency control method is a control method in which the control unit 700 controls the wakeup / descent control of the raw water level in the floating separation tank 100 according to a time period, After receiving the water level measurement value in the water separating tank 100, transmits a control signal to the treatment water control valve 310 so as to maintain the water level in the floating separation tank 100 at a predetermined level, thereby operating the valve opening degree.

At this time, the set water level refers to the water level set according to the time measured by the timer 730. [

That is, the control unit 700 is set so as to repeat the operation of raising and lowering the water level at a predetermined time interval in advance in setting the water level in the floating separation tank 100 in advance.

For example, the water level in the float separating tank 100 is maintained at 5 cm lower than the top of the scum discharging pipe 110 for 5 minutes, and the water level in the float separating tank 100 is discharged to the scum discharging pipe 110 The water level can be arbitrarily set with respect to time, for example, by keeping the state 1 cm higher than the uppermost part of the water level, and repeatedly performing the water level.

Of course, such a water level setting may vary depending on the treatment load applied to the rotary type pressurized floating apparatus, the content of suspended solids in water, the viscosity of a solution including scum, and the like.

The control unit 700 controls the operation of the raw water supply unit 500, the coagulating liquid supply pump 530 and the electric pump 650 and the intake air flow rate regulating plate 690 in the rotary type pressurized floating apparatus according to the present invention. And an electric signal from a pressure gauge, a flow meter, and the like, which are not shown, so as to control the driving of the device.

Next, in the scanning control method, the control unit 700 controls the inflow amount of raw water and the treated water discharge amount in accordance with the raw water level and the squeegee amount in the floating separation tank 100, Similarly, the receiving module 710 starts receiving the level measurement value and the weight measurement value from the level sensor 410 and the weight measuring device 420 (S110, S120).

Then, the operation unit 740 calculates the relative amount of the sprue from the received water level measurement value and the weight measurement value (D130).

The calculation method of the calculation unit 740 is as described above.

Next, the controller 720 adjusts the process water discharge amount and the raw water inflow amount according to the calculated spark amount and the water level.

6, when the water level is equal to or higher than the set value and the scum amount is equal to or higher than the reference value, the raw water containing a large amount of scum is maintained at the set water level or higher. Therefore, Water discharge amount and raw water inflow amount are maintained.

That is, since the raw water containing a large amount of scum preferably discharges the scum at a high water level, the state is maintained.

On the other hand, when the water level is equal to or higher than the set value and the scum amount is lower than the reference value, the raw water containing less scum is maintained at the set water level or higher. Therefore, it is necessary to lower the water level.

Accordingly, the controller 720 adjusts the treatment water control valve 310 to increase the discharge amount of the drain water and maintain the raw water inflow.

Next, when the water level is less than the set value and the scum amount is equal to or greater than the reference value, the raw water containing a large amount of scum is maintained at a low water level, so that the scum is not discharged even though a large amount of scum is included.

Accordingly, the controller 720 controls the treatment water control valve 310 to reduce the discharge amount of the discharged water to increase the water level, while maintaining the raw water inflow amount, thereby restricting the excessive inflow of the scum.

Finally, when the water level is less than the set value and the scum amount is less than the reference value, the raw water containing a small amount of scum is maintained at a low water level, which means that the treatment efficiency of the rotary type pressurized floating apparatus has not been sufficiently exhibited.

Accordingly, the controller 720 maintains (or reduces) the treated water discharge amount, increases the raw water inflow amount by adjusting the raw water control valve 210, increases the water level, and increases the inflow amount of the scum.

As described above, according to the control method of the control unit 700, even when the quality of the treated water to be treated is uneven and the amount of scum contained in the raw water is irregular, the processing efficiency of the rotary pressurized floating apparatus Which can be operated as much as possible.

That is, the conventional rotary pressure float device is fixedly installed with a certain treatment facility, and the kinds of raw water are also constant, so that the scum occurrence ratio is kept constant to some extent according to the inflow amount of raw water.

However, in the case where the rotary type pressurized floating apparatus is configured to be movable, and the various raw water is processed in various places, the amount of the spatting varies very irregularly according to the water quality of the raw water. In this case, Has the advantage of maximizing the treatment efficiency.

Finally, the turning amount control method is a control method in which the control unit 700 adjusts the inflow direction of the raw water according to the amount of the scrap in the floating separation tank 100.

Specifically, when the amount of turning of the raw water increases, water having a relatively large specific gravity is collected by the centrifugal force to the outside of the floating separation tank, and the scum having a relatively small specific gravity is collected on the inside of the floating separation tank relatively, 110, so that the scum discharge efficiency is increased.

The controller 720 controls the vane controller 230 to rotate the vane 220 to allow the raw water to flow outside the floating separation vessel 100 when the amount of scum is large, Thereby controlling the turning amount of the raw water to be increased.

As described above, according to the present invention, it is possible not only to prevent the failure of the external discharge of scum floated during the operation of the rotary push type float device but also to minimize the discharge of unnecessary water.

It is to be understood that the invention is not limited to the disclosed embodiment, but is capable of many modifications and variations within the scope of the appended claims. It is self-evident.

The present invention relates to a pressurized floating apparatus for water treatment for separating suspended solids and surfactants from water in raw water containing suspended solids or surfactants in emulsion or suspension state In the present invention, during operation of the apparatus, the water level in the float separation vessel is alternately positioned at a level higher or lower than the entrance of the scum effluent pipe for a predetermined period of time, and the scum floated is collectively concentrated on the water surface of the floatation tank There is an effect that the release is performed intermittently.

100: Float separation tank 110: Scum discharge pipe
120: sediment discharge pipe 200: raw milk admission
210: Raw water control valve 220: Vane
230: Vane controller 300: Process water discharge piping
310: Treated water control valve 410: Level sensor
420: weighing machine 500: raw water supply part
510: Coagulation bath 520: Coagulation bath storage tank
530: coagulation liquid supply pump 540: raw water transfer piping
600: fine bubble generator 620: treated water circulation pipe
630: Micro-catcher supply piping 640: Air suction piping
650: electric pump 660: pressure-resistant pipe
670: Porous partition plate 680: Pressure control plate
690: Intake air flow control panel 700: Control unit
710: Receive module 720: Controller
730: timer 740:
750:

Claims (8)

A cylindrical floating separator for circulating and flowing raw water to separate additives mixed in raw water according to specific gravity difference;
A raw water inflow pipe provided in an oblique direction with respect to the central axis of the floating separation tank to supply raw water so that the raw water flows;
A scum discharge pipe having an upper opening vertically downwardly in the center of the floating separation chamber and separating and discharging the scum separated from the raw water;
A discharge pipe provided at a lower end of the floating separation tank for discharging the treated water from which the scum is separated to the outside;
A water level sensor for measuring the level of raw water in the floating separation tank;
A flow rate regulating means for regulating a raw water amount in the floating separation tank; And
And a control unit controlling the adjustment means to adjust the raw water amount in the floating separation tank,
Wherein the raw water inflow pipe comprises:
A control vane provided at the floating separation tank connection part to control the raw water inflow angle;
And a vane roller for adjusting a rotation angle of the adjusting vane.
The method according to claim 1,
Wherein the control unit comprises:
A timer for counting time according to a pre-stored time period;
A receiving module receiving a measured value of the level sensor;
A controller for controlling the flow rate control means in accordance with the time period to control a flow rate in the floating separation vessel; And
And a storage unit for storing a flow rate value according to the time period and the time period.
3. The method of claim 2,
Wherein the flow rate control means comprises:
A raw water control valve provided in the raw water inflow pipe to regulate the raw water flowing into the floating separation tank;
And a treatment water control valve provided in the discharge pipe to adjust the amount of water discharged from the floatation separation tank.
The method of claim 3,
Wherein the control unit comprises:
Wherein the controller controls the amount of opening and closing of the raw water control valve so that the level of the raw water in the floating separation tank is maintained for each measured time of the timer.
The method of claim 3,
Wherein the control unit comprises:
Wherein the control unit controls the opening and closing amount of the treatment water control valve so that the water level in the floating separation tank is maintained for each measured time of the timer.
6. The method according to any one of claims 1 to 5,
And a raw water supply unit for supplying the raw water to be treated through the raw water inflow pipe,
The raw-
A fine bubble producing unit for forming fine bubbles by mixing air and water;
And a flocculation reaction tank for mixing the flocculant and the flocculant in the water, and a flocculation reaction tank for mixing the flocculant and the flocculant in the water.
The method according to claim 6,
Further comprising a weight measuring device for measuring the weight of raw water in the floating separation tank.
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