KR101554211B1 - Solid-liquid flotation apparatus using direct injection - Google Patents

Abstract

The present invention relates to a floating-type solid-liquid separating apparatus using direct injection. The apparatus includes: a reaction tank which adds an inorganic coagulant to the entering fluid, stirring the mixture with a reaction stirrer to initiate a mixture reaction, and generates flocs; a floating pressure tank including a connection pipe which is installed on the lower part to be connected to the reaction tank and draws in the fluid including the flocs from the reaction tank, a floating guide plate which is formed in a tilted shape to induce the flocs attached with fine air bubbles to flow upward, a scum skinner conveying and removing the scum collected to the upper part, and a processed water discharge pipe which is installed to be connected to a processing tank to discharge the processed water undergone a solid-liquid separation process to the processing tank; the processing tank which draws in the processed water undergone a solid-liquid separation process by the floating pressure tank through the processed water discharge pipe; an air bubble supply means which directly supplies the pressurized water having compressed air dissolved therein to the floating pressure tank through the direct injection pipe connected to the lower part of the floating pressure tank to generate the fine air bubbles and floats the flocs to the upper part; and a control unit controlling the operation of the apparatus.

Description

SOLID-LIQUID FLOTATION APPARATUS USING DIRECT INJECTION BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid level flotation apparatus, and more particularly, to a liquid level flotation apparatus using direct flotation that feeds pressurized water to a pressurized flotation tank by simple valve operation to generate a large amount of microbubbles, .

In general, a liquid-liquid separation separator is a device for separating suspended solids from liquid from a liquid, and is widely used in fields such as water treatment, sewage treatment, and waste water treatment such as agriculture and food.

The flotation method for solid-liquid separation includes air flotation, dissolved air flotation, and vacuum flotation. The air flotation method is a method in which scum, In many cases, it is not effective for oils other than wastewater and industrial wastewater, which are sure to form, and the pressurized flotation method and the refining method require a recirculating facility for the treated water and a pressurized tank.

In this connection, in the prior art, Patent Document 1 discloses a floating separation tank main body which forms a site where a flocculation reaction occurs in a coagulation reaction bath to adhere to fine bubbles and float to the surface together with micro-bubbles, A scum remover disposed at an upper portion of the floatation separation tank and configured to remove scum formed by mixing flocs and foreign substances floating on the surface of the floating separation tank main body; Wherein the inflow water floatation induction device comprises a conical portion gradually decreasing in diameter toward the lower end portion of the conical portion, and a cylindrical portion formed in the upper end of the conical portion so as to have the same diameter, And a lower end portion disposed in the cyclone body And an upper portion extending to an upper region of the cyclone body to guide the floating of the inflow water.

In addition, Patent Document 2 discloses a solid-liquid separation method in which a flocculation reaction tank, floating tank, treated water recirculation means, and bubble generating means are provided and adsorbed through a bubble to flocculate, The ionic surfactant is added to a predetermined amount of the treated water flowing into the bubble generating means to form ionic microbubbles having strong electric charges at the interface and ionic microbubbles are introduced into the influent water flowing into the floating tank in the flocculation reaction tank, There has been disclosed a method for separating and removing solid matter from a floating tank by adsorbing solids with an electric attraction of ionic microbubbles by introducing the microbubbles,

However, the above-described conventional liquid-floating separator has a small amount of minute bubbles and requires an additional facility such as a large-sized pressurized tank. In addition, a large-capacity pressurized water pump for supplying pressurized water to a large tank and an air compressor As the site area and the volume of the equipment are increased due to the necessity, the size of the apparatus is increased, the power is increased, the operation cost is increased, and there is a problem that many skilled workers are needed.

In addition, in the floating separator of the liquid-liquid separator, a spray nozzle for spraying pressurized water is provided, and foreign matter, scale, and the like are often generated inside the spray nozzle.

Further, the fine bubbles are not supplied to the rear side of the floating separation tank, so that the treatment efficiency of the floc is reduced, the scum floated above can be settled again, and it is difficult to cope with load fluctuation and toxic material inflow.

Korean Registered Patent No. 10-1211654 (issued December 12, 2012) Korean Patent Publication No. 2000-0037345 (published on July 5, 2000)

The present invention has been conceived to solve all of the problems described above, and it is an object of the present invention to provide a method and an apparatus for directly extracting pressurized water without supplying an injection nozzle and increasing the amount of fine bubbles generated by supplying pressurized water with high- , It is possible to reduce the size and volume of the apparatus, reduce unnecessary power, speed up the separation of the liquid, increase the treatment efficiency, enable stable treatment of micro flocs, and cope with instantaneous load fluctuations and toxic substance inflows The present invention has been made in view of the above problems.

In order to solve the above-mentioned problems, the present invention provides a method for producing a floc, comprising: a reaction tank for adding an inorganic coagulant to the raw water, stirring the mixture with a reaction stirrer, A flotation induction plate provided at an upper portion of the flask and connected to the reaction tank for introducing fluid containing flocs from the reaction tank; A pressurized floatation tank including a scum skimmer for removing the treated water, and a treated water discharge pipe connected to the treated water tank at the bottom and discharging the treated water, which has been subjected to solid-liquid separation, into the treated water tank; A treated water tank in which the treated water subjected to solid-liquid separation by the pressurized floating tank flows in through the treated water discharge pipe; Bubble supplying means for directly supplying the pressurized water in which the compressed air is dissolved through the straight pipe connected to the lower portion of the pressurized flotation tank to the pressurized flotation tank to generate minute bubbles to float the flocs upward; And a control panel for controlling the operation of the apparatus.

In addition, the present invention relates to a method for producing a floc, which comprises injecting an inorganic coagulant into an inflow fluid, stirring the mixture with a reaction stirrer, An agglomeration tank for introducing the polymer into the fluid containing the flocs introduced from the reaction tank and agitating the agglomerated agglomerated agglomerate with the grown flocs; A flotation induction plate provided at an upper portion of the flask and connected to the reaction tank for introducing fluid containing flocs from the reaction tank; A pressurized floatation tank including a scum skimmer for removing the treated water, and a treated water discharge pipe connected to the treated water tank at the bottom and discharging the treated water, which has been subjected to solid-liquid separation, into the treated water tank; A treated water tank in which the treated water subjected to solid-liquid separation by the pressurized floating tank flows in through the treated water discharge pipe; Bubble supplying means for directly supplying the pressurized water in which the compressed air is dissolved through the straight pipe connected to the lower portion of the pressurized flotation tank to the pressurized flotation tank to generate minute bubbles to float the flocs upward; And a control panel for controlling the operation of the apparatus.

At this time, the floating induction plate is also characterized in that a plurality of floating induction holes are formed so as to pass therethrough to allow minute bubbles to pass therethrough.

In addition, a scum removing paddle is disposed behind the scum skimmer and is provided with a scum removing paddle for removing and removing scum transferred by the scum skimmer to the scum discharging part while rotating.

In addition, the scum removing paddles are characterized in that the scum removing plate is provided at the distal end portion so as to be adjustable in distance from the scum discharging portion.

In addition, the scum discharging portion is also characterized in that a guide member for guiding the inflow of the scum into the outside of the upper portion is connected.

In addition, the treated water discharge pipe is provided at the lower inner side of the pressurized floating vessel and connected to the treated water tank, and also has a plurality of through holes formed therein.

The bubble supplying means may include a pressurized water pump that pressurizes a part of the treated water stored in the treated water tank with the pressurized water pump and the pressurized water compressed by the air compressor into the pressurized tank, The dissolved pressurized water is directly supplied to the pressurized flotation tank through the direct branch pipe to generate minute bubbles to float the flocs.

The pressure tank is provided with an injection control plate for controlling the injection angle of the pressurized water introduced into the upper inlet and an air injection nozzle for spraying the compressed air supplied from the air compressor and adjusting the direction, A vortex forming plate having a plurality of baffles is provided and a storage space for storing pressurized water in which compressed air is dissolved is formed in a lower portion.

Furthermore, a water level control software is provided on the outlet side of the treatment water tank to easily adjust the water level in the pressurized floating water tank.

The present invention relates to a process for producing floc by adding an inorganic coagulant to a fluid introduced into a reaction tank and stirring the mixture with a reaction stirrer to produce a floc; The fluid containing flocs is introduced into the pressurized floating tank through the lower connecting pipe connected to the reaction tank and then the pressurized water in which the compressed air is dissolved in accordance with the valve operation of the direct piping connected to the lower side of the connecting pipe, A step of spraying water directly to generate fine bubbles; A first flotation step in which the generated minute bubbles adhere to the flocs and the flocs undergo the induction of the inclined flotation plate and float up; Microbubbles are passed through the flotation induction holes formed in the flotation induction plate through which the microbubbles adhere to the flocs that have not been flashed in the primary flotation stage and are floated upwards and the microbubbles are floated up to form a bubble layer, A secondary lifting step in which sedimentation of the scum is prevented; A scum removing step of transferring the scum collected on the upper part of the pressurized floating tank to the scum discharging part by using a scum skimmer to remove the scum; And a treated water discharging step of discharging treated water, which has been subjected to solid-liquid separation in the pressurized floating tank through a treated water discharge pipe connected to the treated water tank at a lower portion of the pressurized floating tank, into the treated water tank, ≪ / RTI >

The present invention also relates to a method for producing a flock, comprising: a reaction step of adding an inorganic coagulant to a fluid introduced into a reaction tank, stirring the mixture with a reaction stirrer, An agglomeration step of adding a polymer to a fluid containing flocs flowing into the flocculation tank in the reaction tank and agitating the flocculated flocs by agitation with an agglomeration agitator; The fluid containing flocs is introduced into the pressurized floating tank through the lower connecting pipe connected to the reaction tank and then the pressurized water in which the compressed air is dissolved in accordance with the valve operation of the direct piping connected to the lower side of the connecting pipe, A step of spraying water directly to generate fine bubbles; A first flotation step in which the generated minute bubbles adhere to the flocs and the flocs undergo the induction of the inclined flotation plate and float up; Microbubbles are passed through the flotation induction holes formed in the flotation induction plate through which the microbubbles adhere to the flocs that have not been flashed in the primary flotation stage and are floated upwards and the microbubbles are floated up to form a bubble layer, A secondary lifting step in which sedimentation of the scum is prevented; A scum removing step of transferring the scum collected on the upper part of the pressurized floating tank to the scum discharging part by using a scum skimmer to remove the scum; And a treated water discharging step of discharging treated water, which has been subjected to solid-liquid separation in the pressurized floating tank through a treated water discharge pipe connected to the treated water tank at a lower portion of the pressurized floating tank, into the treated water tank, ≪ / RTI >

At this time, the coagulation step is characterized by including a step of adding a pH adjusting agent when the pH is decreased by the inorganic flocculant added in the reaction step.

In addition, the pressurized water in which a part of the treated water stored in the treated water tank is pressurized by the pressurized water pump and the compressed air compressed by the air compressor are introduced into the pressurized tank, and the pressurized water, And a pressurized water supply step of directly supplying the pressurized water to the pressurized floating tank through a tubular pipe.

The method further includes the step of controlling the level of the inside of the pressurized floating tank by discharging the treated water to the outside by activating the water level adjusting ware installed at the outlet side of the treated water tank.

According to the present invention, since the amount of fine bubbles generated by supplying the pressurized water in which the compressed air is dissolved at high density can be directly increased without the injection nozzle, the size and volume of the apparatus can be reduced, It is possible to reduce the unnecessary power, to rapidly separate the liquid and to increase the treatment efficiency, to stably process the micro flocs, and to cope with the instantaneous load fluctuation and the inflow of toxic substances.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a configuration of a liquid float separation apparatus according to an embodiment of the present invention; FIG.
FIG. 2A is a view showing bubble supplying means according to an embodiment of the present invention. FIG.
FIG. 2B is an exploded view of a portion of a pressurizing tank according to an embodiment of the present invention. FIG.
3 is a block diagram showing a control panel of a liquid floatation separation apparatus according to an embodiment of the present invention.
4 is a view showing a flow of fluid in a liquid-liquid separation apparatus according to an embodiment of the present invention.
FIG. 5 is a flowchart of a method for separating a liquid phase in accordance with an embodiment of the present invention.

Hereinafter, with reference to the drawings, specific details for carrying out the liquid-liquid separation separator 1 using direct yarn according to the present invention will be described in detail with reference to examples.

The liquid-liquid floatation separating apparatus (1) using the straight yarn according to the present invention supplies the pressurized water to the pressurized floating tank only by a simple valve operation to generate a large amount of minute bubbles and attach the floc to the floc, Liquid separation, the reaction tank 100, the flocculation tank 200, the pressurized floating tank 300, the treated water tank 400, the bubble supplying means 500, and the control panel 700.

Referring to FIG. 1, the reaction tank 100 is filled with raw water, and an inorganic coagulant is injected into the raw water by using a chemical feed pump. The raw coagulant is stirred by a reaction stirrer 110, do.

At this time, in order to efficiently remove the floating material, the colloidal material which has a charge and is difficult to precipitate or float, and the reactive material dissolved in the water, the reaction tank 100 injects an inorganic coagulant suitable for the characteristic of the material, Thereby producing floc which can be separated. In addition, since the reactivity in the reaction tank 100 increases as the speed gradient G increases, the reaction stirrer 110 having a strong agitation force is installed.

4, a pH meter 120 is installed in the reaction tank 100. The pH meter 120 measures the pH of the raw water and sends the measured value to the control panel 700, 700) judges the increase or decrease of the pH by the measurement value and alerts or performs subsequent processing. For example, when the pH of the incoming raw water is drastically or rapidly increased, it is determined that a toxic substance has been introduced, and the subsequent alarming process such as neutralization is performed quickly.

The flocculation tank 200 may or may not be included in the floatation separation apparatus 1. When the amount of the inorganic flocculant injected into the reaction tank 100 is large and correction is required when the pH of the fluid is low, 3, a pH meter 220 is installed in the flocculation tank 200, and the pH meter 220 measures the pH of the fluid in the flocculation tank 200, And sends the measurement value to the control panel 700. The control panel 700 determines whether the pH is increased or decreased according to the measurement value, and alerts or performs a subsequent process.

In addition, when the amount of the inorganic flocculant injected into the reaction tank 100 is small and pH does not affect the subsequent facilities, the flocculant tank 200 may not be included.

The coagulation tank 200 is charged with a polymer as a coagulation aid by using a chemical feed pump to the fluid containing the flocs introduced from the reaction tank 100 and stirred with the coagulation agitator 210 to perform a slow mixing reaction, (F). In addition, the reaction in the flocculation tank 200 increases the reactivity as the speed gradient G is lower, so that the flocculation agitator 210 having a low agitating force is installed.

The pressurized floating tank 300 is a place where fluid containing flocs F is introduced into the reaction tank 100 or the flocculation tank 200 to remove flocks and scum from the reaction tank 100. For this purpose, 100 or the connection pipe 310 connected to the flocculation tank 200 is connected to the lower part of the pressurized floating tank 300 to prevent the external air from flowing into the tank and inhibiting the generation of minute bubbles.

4, a flotation induction plate 320 is formed at a lower portion of a front portion of the pressurized floating flask 300 so as to be inclined rearward upward to guide upward the floc F with the fine bubbles A thereon. Respectively. Thus, the flock F coupled with the minute bubble A at the lower portion of the front portion of the pressurized floating tank 300 is quickly lifted up to the upper portion by the induction of the inclined guide plate 320, Gathered.

The floatation induction plate 320 has a plurality of floatation induction holes 321 formed therein and the micro flocs and microbubbles A having a smaller size of the floatation induction holes 321 are formed in a turbulent state The fine flocs are attached to the micro-bubbles and floated upward, while the remaining micro bubbles continue to float to the top, thereby preventing the settling of the scum floating on the surface, thereby maximizing flotation efficiency .

The pressurized floating tank 300 is provided with a scum skimmer 330 for transferring and removing the scum S collected on the surface of the pressurized floating tank 300. The scum skimmer 330 is provided at a rear upper portion of the pressurized floating tank 300, And a scum discharging unit 340 for discharging the scum S into the external storage tank and removing the scum S from the external storage tank. Here, the scum discharging part 340 is connected to a guide member 341 for guiding the inflow of the scum S to the outside of the upper part.

In addition, the scum skimmer 330 receives the driving force of the driving motor and rotates repeatedly between the scum skimmer 330 and the scum discharging unit 340, so that the scum S transferred by the scum skimmer 330 is discharged to the scum discharging unit 340. [ The scum removing paddle 350 includes a plurality of vanes 351 and a scum removing plate 352 attached to the distal end of the vane 351 And the scum removing plate 352 is made of a light and rigid FRP material and is installed so that the distance between the scum discharging unit 340 and the guide member 341 can be adjusted.

When the scum skimmer 330 removes only the scum skimmer 330, the tension on the chain driving the scum skimmer 330 is increased and the chain is stretched. Thus, And the scum removing paddle 350 is provided with a speed control type decelerating motor so that the operation speed can be adjusted to adjust the amount or the water content of the scum S to be removed.

A process water discharge pipe 360 is connected to the process water tank 400 so that the treated water that has been solidly separated from the inside of the pressurized floating tank 300 is introduced into the processing tank 400 ). At this time, a plurality of through holes (not shown) are evenly distributed through the process water discharge pipe 360 to prevent process water from flowing into the pressurized floating tank 300.

The treated water tank 400 is filled with the treated water discharged from the pressurized floating tank 300 through the treated water discharge pipe 360 and is stored in the treatment tank 400. The treated water tank 600 is provided as a subsequent facility, 400 is installed at the outlet of the pressurized floating tank 300 to facilitate the adjustment of the water level in the pressurized floating tank 300.

2A, the bubble supplying means 500 is connected to the pressurized water through a direct branch pipe 540 connected to the lower portion of the pressurized floating tank 400, that is, below the portion to which the connecting pipe 310 is connected, And the compressed water in which the compressed air is dissolved is directly supplied to the interior of the pressurized floating tank 300. At this time, the pressurized water is depressurized to generate microbubbles, and fine bubbles are generated in the floc F of the fluid So that the flock F rapidly floats upwards.

The bubble supplying means 500 presses a part of the treated water stored in the treatment water tank 400 with a pressurized water pump 510 having a head of about 6 kg / cm 2 or more to generate pressurized water to pressurize the pressurized pipe P1 And the compressed air compressed by the air compressor 520 is introduced into the pressurizing tank 530 through the air pipe P2 at a predetermined amount of air in relation to the amount of pressurized water. At this time, the amount of the treated water circulated by the pressurized water pump 510 is approximately 15 to 30% of the treated water to be introduced.

A pressure gauge 511 for reading the pressure of the pressurizing tank 530 is provided on the pressurizing pipe P1 outside the pressurizing tank 530. A reverse flow prevention valve 521 and a flow rate controller The flush valve 521 closes the valve when the liquid floatation separator 1 is not operated or an abnormality occurs so that the pressurized water in the pressurization tank 530 is discharged to the air compressor 520, And the flow rate controller 522 controls the amount of compressed air to be injected from the air compressor 520 into the pressurization tank 530.

An injection regulating plate 531a for regulating the spray angle of the pressurized water flowing into the inside of the pressurizing tank 530 is installed in the upper inflow portion of the pressurization tank 530. The injection regulating plate 531a is connected to an external regulator 531b The pressurized water is sprayed in a downward direction from the upper portion of the pressurized water tank 530 by the spray regulating plate 531a to be dispersed and the baffle 534 formed in the vortex forming plate 533 The compressed air is contacted with this pressurized water and is more easily dissolved.

In addition, an air injection nozzle 532 is installed in the upper inlet of the pressurization tank 530 to inject compressed air supplied from the air compressor 520 and adjust the direction of the air, and the air injection nozzle 532 is pressurized So that the compressed air is injected into the inside in the same direction as the number of the nozzles.

2B, an eddy current plate 533 is coupled to the upper inner wall of the pressurizing tank 530 in a longitudinal direction, and one end of the eddy current plate 533 is coupled to the inner wall of the pressure tank 530 And a plurality of baffles 534 are formed along the longitudinal direction of the vortex forming plate 533 at the other end of the vortex forming plate 533. The other end of the vortex forming plate 533 protrudes toward the inside of the pressurizing tank 530 in a diagonal direction, And the baffle 534 is horizontally disposed in the same diagonal direction as the vortex forming plate 533. The vortex forming plate 533 is formed to protrude further inward than the vortex forming plate 533.

The baffle 534 has a shape of a bean sprout and is formed in a straight shape and has a support base 534a attached to the vortex formation plate 533 and a baffle head 534b having a width wider than the support base 534a at its tip The vortex flow of the introduced pressurized water is more strongly generated to aggressively induce the vortex reaction of the pressurized water and the compressed air to generate pressurized water in which compressed air is dissolved. In the lower portion of the pressurizing tank 530, the pressurized water in which the compressed air is dissolved is temporarily stored to remove the erroneous flow of the pressurized water, and a storage space 535 for preventing the minute bubbles from being hit, A water level meter 536 for reading the level of the inside of the pressurization tank 530 is installed and a drain valve 537 is installed below the pressurization tank 530.

Thus, the vortex flow of the pressurized water is generated more strongly through the vortex forming plate 533 protruding in the oblique direction on the inner wall of the pressurizing tank 530 and the baffle 534 having the bean sprout shape, And the area and velocity of the compressed air increase, it is possible to obtain high-quality saturated water dissolved in high density close to 100% in a short period of time.

Thus, the size and volume of the pressurized floating vessel 300 can be reduced, the capacity of the pressurizing water pump 510 and the air compressor 520 can be reduced, and unnecessary power can be reduced.

In addition, the pressurized water in which the compressed air is dissolved in the pressurizing tank 530 is directly supplied to the pressurized floating tank 300 through the straight pipe 540 to generate fine bubbles, thereby floating the flocs. At this time, the downstream of the direct branch pipe 540 is branched to a plurality of branch pipes and connected to the pressurized floating tank 300, and each branch pipe is provided with pressurized water in which compressed air is dissolved by the pressurized floating tank 300 And a direct injection valve 541 for injecting and injecting the fuel is provided.

In this way, even if there is no injection nozzle as in the prior art, the pressurized water in which the compressed air is dissolved through the straight pipe 540 can be directly dispersed into the pressurized floating vessel 300, Since the amount of the minute bubbles is greatly increased by supplying the pressurized water, the size and volume of the apparatus can be reduced, unnecessary power can be reduced, quick separation of the liquid can be achieved, processing efficiency can be increased, , Instantaneous load variation, and toxic substance inflow.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

5, the method according to the present invention includes a reaction step S10, an aggregation step S20, a pressurized water spraying step S30, a first floatation step S40, a second floatation step S50 , A scum removing step (S60), and a treated water discharging step (S70).

First, the reaction step (S10) is a step of adding an inorganic coagulant to the raw water flowing into the reaction tank 100, mixing the reaction mixture with the reaction stirrer 110 to produce flocs.

Based on the molar ratio obtained in the chemical reaction equation, the optimum amount of inorganic coagulant and the amount of addition were calculated by the Jar-Test coagulation test, and then the calculated amount of inorganic coagulant was injected to 450 (G), resulting in a relatively small flock of suspended solids, colloidal materials, and reactive materials.

The flocculating step S20 is a step of injecting the polymer into the fluid containing the flocs introduced from the reaction tank 100 and agitating the flocculated water by the flocculation stirrer 210 to flocculate the flocculated floes F.

In order to more efficiently separate solid-liquid flocs generated in the reaction tank 100, a flocculation tank 200 is installed, polymer as an aggregation aid is injected, and slowly stirred at an appropriate speed gradient (G) of about 150 And flocculate with the grown flocs (F). However, if there is no problem in the solid-liquid separation by the flocs generated in the reaction tank 100, the flocculation step (S20) may be omitted. However, pH of the fluid is measured by the pH meter 220, Or when a polymer having a specific property is applied, the aggregation step (S20) is performed.

The pressurized water spraying step S30 is a step in which fluid containing flocs is introduced into the pressurized floating tank 300 through the connection pipe 310 connected to the reaction tank 100 or the flocculation tank 200, The minute bubbles A are generated by directly injecting the pressurized water in which the compressed air is dissolved into the pressurized floating tank 300 according to the operation of the direct branch valve 541 of the direct branch pipe 540 connected to the lower side .

To this end, pressurized water in which a part of the treated water stored in the treatment water tank 400 is pressurized by the pressurized water pump 510 and compressed air compressed by the air compressor 520 are introduced into the pressurizing tank 530, A pressurized water supply step of directly supplying the pressurized water in which the compressed air is dissolved in the tank 530 to the pressurized floating tank 300 through the direct branch pipe 540 is performed.

In order to prevent the generation of large air bubbles, the connection pipe 310 is installed in the lower part rather than the upper part. In the case of the reaction tank 100 or the flocculation tank 200, ), Connect to the lower part of the floor.

Then, the direct branch valve 541 is opened, and the pressurized water in which the compressed air is dissolved is directly injected into the inner bottom of the pressurized floating tank 300 through the direct injection pipe 540. As the pressure is lowered close to the atmospheric pressure, And is ejected from the bottom of the pressurized floating tank 300 toward the upper side.

As described above, since the pressurized water in which the compressed air is dissolved is directly sprayed from the direct injection pipe 540 without installing the injection nozzle in the pressurized floating tank 300 as in the prior art, the injection nozzle is clogged and the floatation efficiency is lowered .

In the primary flotation step S40, the generated minute bubbles A are attached to the flocs F and the flocs F to which the minute bubbles A are attached are guided by the inclined flushing plates 320 And then floated upward.

At this time, in the course of mixing the fluid containing flocs from the reaction tank 100 or the flocculation tank 200 with the pressurized water in which the compressed air is dissolved, numerous infinitesimal minute bubbles A adhere to the flocs F, F) rise to the top much more rapidly than conventional methods.

As described above, the most important factor in designing and determining the size and volume of the liquid-liquid separator 1 using fine bubbles is the saturation amount of the compressed air dissolved in the pressurized water. If the amount of generated minute bubbles is small, A large-sized pressurized tank is required, and a large-capacity pressurized water pump and an air compressor for supplying pressurized water to a large-sized pressurized tank are required. At the same time, the volume of the pressurized floating tank 300 So that a large amount of unnecessary power is required.

In order to compensate for these drawbacks, in the pressurized water supply step, the vortex forming plate 533 of the pressurizing tank 530 is protruded inward and arranged in a comb or oblique direction, and has a wing shape of a butterfly, Since the reaction rate and area of the pressurized water and the compressed air are increased, the compressed air is optimized to obtain a high-quality saturated water dissolved at a high density close to 100% in a short period of time. As a result, The volume of the pressurized water is reduced, the size of the pressurized tank is reduced, and the capacity of the pressurized water pump and the air pressure addition can be reduced.

The secondary flotation step S50 is a step in which the microbubbles A pass through the flotation induction hole 321 formed in the flotation induction plate 320 and are floc F that has not flashed in the primary flotation step S40, The minute bubbles A float up to the upper portion and the bubble layer is formed while the remaining minute bubbles A are floated on the surface to prevent the accumulated scum S from sinking, .

In the first flotation step S40, the flock F with the fine bubbles A attached thereto at the front portion of the pressurized floating tank 300 is guided upward by the flotation induction plate 320, In the secondary flotation step S50, fine flocs and fine bubbles flow in a turbulent state and pass through the flotation induction holes 321 formed along the longitudinal and lateral directions on the flotation induction plate 320, And the remaining minute bubbles are continuously floated to the upper part, thereby preventing settling of the scum floated to the surface, thereby maximizing the floatation efficiency.

The scum removing step S60 is a step of removing the scum S collected at the upper portion of the pressurized floating tank 300 by using the scum skimmer 330 and transferring the scum S to the scum discharging unit 340.

The scoop skimmer 330 is provided in the pressurized floating tank 300 to transfer the scum S collected on the surface thereof to the scoop skimmer 330. The scoop skimmer 330 is provided at a rear upper portion of the pressurized floating tank 300, S) is introduced and discharged to the external storage tank to remove the scum discharging unit 340

At this time, a driving force of the driving motor is received between the scum skimmer 330 and the scum discharging unit 340, and the scum S is conveyed to the scum discharging unit 340 by the repeated rotation of the scum skimmer 330 The scum removing paddle 350 includes a plurality of vanes 351 and a scum removing plate 352 attached to the front end of the vane 351. The scum removing paddle 350 includes a plurality of vanes 351, The plate 352 is made of a light and rigid FRP material and is provided so that the distance between the scum discharge portion 340 and the guide member 341 can be adjusted.

The treated water draining step S70 is a step for draining the treated water that has been solidly separated from the pressurized floating tank 300 through the treated water discharge pipe 360 connected to the treatment tank 400 below the pressurized floating tank 300, (400).

At this time, in the treatment water tank 400, the treated water that has been solidly separated by the pressurized floating tank 300 flows in and is stored through the treated water discharge pipe 360, and the outflow tank 600 is provided as a follow- A wide water level control ware 410 is installed on the outlet side of the pressurized floating tank 300 to control the water level opening and closing of the water level control ware 410 so that the water level in the pressurized floating tank 300 can be easily adjusted, It is possible to prevent the sudden change of the water level while preventing the treatment water from leaning, and to obtain a stable and constant treatment efficiency.

As a result, the liquid-liquid separation apparatus and method according to the present invention can directly extract pressurized water without the injection nozzle, and the amount of microbubbles generated by supplying pressurized water in which compressed air is dissolved at high density is greatly increased, It is possible to reduce the size and volume of the apparatus, reduce unnecessary power, speed up the separation of a large amount of liquid, increase the treatment efficiency, enable stable treatment of micro flocs, and cope with instantaneous load fluctuations and toxic substance inflows .

The present invention is not limited to the above-described embodiments. Anything having substantially the same constitution as the technical idea described in the claims of the present invention and achieving the same operational effect is included in the technical scope of the present invention.

1. Large liquid floatation separator 100. Reactor
110. Reaction stirrer 120. pH meter
200. Flocculation tank 210. Flocculation tank
220. pH meter 300. Pressurized floating tank
310. Connecting piping 320. Floating induction plate
321. Floating induction hall 330. Scum skimmer
340. Scum discharging portion 341. Guide member
350. Scam removal paddles 351. Wings
352. Schemer removing plate 360. Process water discharging pipe
400. A treatment tank 410. A level control wear
500. Bubble supplying means 510. Pressurized water pump
511. Manometer 520. Air compressor
521. Reverse flow prevention valve 522. Flow rate controller
530. Pressure tank 531. Inflow section
531a. Spray control plate 531b. Direction adjuster
532. Air injection nozzle 533. Vortex formation plate
534. Baffle 534a. support fixture
534b. Baffle head 535. Storage space
536. Gauge 537. Drain valve
540. Straight branch pipe 541. Straight branch valve
600. Spill tank 700. Control panel
A. Micro-bubble F. Flock
S. Scum

Claims (15)

delete delete A reaction tank in which an inorganic coagulant is added to the raw water and mixed with a reaction stirrer to produce flocs; A flotation induction plate provided at an upper portion of the flask and connected to the reaction tank for introducing fluid containing flocs from the reaction tank; A pressurized floatation tank including a scum skimmer for removing the treated water, and a treated water discharge pipe connected to the treated water tank at the bottom and discharging the treated water, which has been subjected to solid-liquid separation, into the treated water tank; A treated water tank in which the treated water subjected to solid-liquid separation by the pressurized floating tank flows in through the treated water discharge pipe; Bubble supplying means for directly supplying the pressurized water in which the compressed air is dissolved through the straight pipe connected to the lower portion of the pressurized flotation tank to the pressurized flotation tank to generate minute bubbles to float the flocs upward; And a control panel for controlling operation of the apparatus,
Wherein the bubble supplying means includes means for introducing pressurized water in which a part of the treated water stored in the treated water tank is pressurized with a pressurized water pump and compressed air compressed by the air compressor into a pressurized tank, The pressurized water is directly supplied to the pressurized floating tank through the direct branch pipe to generate minute bubbles to float the flocs,
The pressurizing tank is provided with an injection regulating plate for regulating the spray angle of the pressurized water introduced into the upper inflow portion and an air spray nozzle for spraying the compressed air supplied from the air compressor and adjusting the direction, And a storage space for storing the pressurized water in which the compressed air is dissolved is formed in the lower part.
A reaction tank in which an inorganic coagulant is added to the raw water and mixed with a reaction stirrer to produce flocs; An agglomeration tank for introducing the polymer into the fluid containing the flocs introduced from the reaction tank and agitating the agglomerated agglomerated agglomerate with the grown flocs; A flushing induction plate formed at an upper portion of the flocculation tank and connected to the flocculation tank for introducing fluid containing flocs from the flocculation tank; A pressurized floatation tank including a scum skimmer for transferring and removing the treated water, and a treated water discharge pipe connected to the treated water tank at the bottom and discharging the treated water which has been subjected to solid- A treated water tank in which the treated water subjected to solid-liquid separation by the pressurized floating tank flows in through the treated water discharge pipe; Bubble supplying means for directly supplying the pressurized water in which the compressed air is dissolved through the straight pipe connected to the lower portion of the pressurized flotation tank to the pressurized flotation tank to generate minute bubbles to float the flocs upward; And a control panel for controlling operation of the apparatus,
Wherein the bubble supplying means includes means for introducing pressurized water in which a part of the treated water stored in the treated water tank is pressurized with a pressurized water pump and compressed air compressed by the air compressor into a pressurized tank, The pressurized water is directly supplied to the pressurized floating tank through the direct branch pipe to generate minute bubbles to float the flocs,
The pressurizing tank is provided with an injection regulating plate for regulating the spray angle of the pressurized water introduced into the upper inflow portion and an air spray nozzle for spraying the compressed air supplied from the air compressor and adjusting the direction, And a storage space for storing the pressurized water in which the compressed air is dissolved is formed in the lower part.
The method according to claim 3 or 4,
Wherein the floatation induction plate is provided so that a plurality of floatation inducing holes are formed to pass therethrough so that fine bubbles can pass therethrough.
delete The method according to claim 3 or 4,
Wherein the treatment water discharge pipe is provided at a lower inner side of the pressurized float tank and connected to the treatment water tank and has a plurality of through holes formed therethrough.
The method according to claim 3 or 4,
Wherein a water level control software is provided at an outlet side of the treatment water tank to easily adjust the water level in the pressurized floating water tank.
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