KR20200054472A - Water treatment method using floatation - Google Patents

Abstract

The present invention relates to a water treatment method with minimized installation space, capable of easily removing coagulated flocs to be removed by using microbubbles and coarse bubbles. More specifically, the water treatment method comprises the steps of: 1) supplying treatment water formed in a flotation tank to a mixer pump into which gas is introduced, to generate dissolved water in which the treatment water and the gas are dissolved; 2) dividing the dissolved water discharged from the mixer pump into a predetermined ratio, and supplying the same to a microbubble supply member and a coarse bubble supply member, to generate microbubbles and coarse bubbles; 3) supplying the generated microbubbles to a coagulated floc reaction unit into which wastewater and a flotation aid consisting of a coagulant and a polymer are introduced, performing mixing in steps to generate coagulated flocs with the microbubbles attached thereto, and supplying the generated coagulated flocs to a flotation reaction unit; and 4) obtaining treatment water, which is purified by removing the coagulated flocs supplied to the flotation reaction unit, accommodating the treatment water separately, and supplying a portion thereof to the mixer pump while discharging the rest out of the flotation reaction unit. In particular, the coarse bubble supply member is installed in a lower part of the flotation reaction unit so as to be able to discharge coarse air bubbles therein, thereby causing the coagulated flocs settling inside the flotation reaction unit to rise.

Description

Water treatment method using floatation

The present invention relates to a water treatment method in which an installation space that can easily remove flocculation flocks to be removed by using micro bubbles and coarse bubbles is minimized.

In general, wastewater treatment system is a series of physical treatment (unit operation) and chemical or biological treatment (unit process: unitprocess) to purify livestock wastewater, domestic sewage, factory wastewater, aquaculture wastewater, landfill leachate, etc. ) To remove contaminants from the wastewater in three steps.

In the primary treatment, screening that filters relatively large contaminants contained in the wastewater to screens with uniformly sized pores, sedimentation to separate contaminants heavier than water by gravity, etc. The unit operation of is applied to primarily remove the floating and sedimentary contaminants contained in the wastewater.

In the second treatment, various chemicals such as flocculants, adsorbents, and disinfectants are used to coagulate and settle suspended suspensions, adsorb and adsorb pathogens, and decompose non-precipitated biodegradable organics by the action of microorganisms to gas It uses biological unit processes such as sedimentation and removal by converting to or flocculating with suspended solids, and mainly removes organic substances contained in wastewater.

In the 3rd treatment (or advanced treatment), various unit operations and unit processes mentioned in the 1st and 2nd treatment are applied in combination, and ammonia, nitrogen, and phosphorus that are not easily removed in the 1st and 2nd treatment It removes various inorganic substances, including heavy metals and synthetic organic substances.

The general wastewater treatment method as described above has a process of removing various floating substances such as organic substances, and the separation and removal of these floating substances are sedimentation and floating separation depending on the physical and chemical properties (eg, size, density, surface charge, etc.) of the floating substances. Use lights, etc. selectively.

The sedimentation separation is to form a clot by mixing and stirring by adding a flocculant in water, and to precipitate by adsorbing impurities thereon. Particles heavier than water settle in stagnant water or water with very slow flow to separate from water. Way.

The floating separation refers to a phenomenon in which air is attached to a suspended phase dispersed in a dispersion medium and floats up to a limit surface where the dispersion medium and air are in contact, and the specific gravity of the suspension is smaller than water or small bubbles are attached to the suspension to decrease the specific gravity. It is a method of separating from water by stopping on the surface of water.

However, the floating separation as described above is because the suspended matter (agglomeration floc) is settled in stagnant water or extremely slow water and separated from water, it takes a long time to treat the wastewater, and the particles are separated by flowing into a wide bath so that the water flows slowly. There is a problem in that the installation area of the treatment plant and the installation cost increase because the sedimentation basin to be installed must be installed.

Domestic registered patent No. 10-0446141 (Announcement date: 2004.08.25.) Domestic registered patent No. 10-1718828 (Publication date: 2017.03.23.)

The present invention has been proposed to solve the above-mentioned conventional problems, and is intended to provide a water treatment method capable of taking a temporal advantage by wastewater treatment while minimizing the installation area of the treatment plant.

In order to solve the above-described technical problem, the water treatment method using floating separation according to the present invention is 1) by supplying the treated water formed inside the floating reaction tank to the mixer pump through which the gas flows, so that the treated water and dissolved water in which the gas is dissolved in each other Generating, 2) dividing the dissolved water discharged from the mixer pump into a certain ratio and supplying to the micro-bubble supply member and the coarse-bubble supply member, respectively, to generate micro-bubbles and coarse bubbles, and 3) generating the micro-bubbles. After feeding the flocculation floc reaction unit into which the flotation agent composed of wastewater, flocculant, and polymer flows in, it is mixed with each other step by step to generate flocculation floc with the microbubbles adhered to it, and to supply the flocculation floc to the flotation separation reaction portion Step and 4) Obtain the treated water that has been purified by removing the flocculation supplied to the floating separation reaction unit, and separate the treated water. Receiving the road and supplying a portion thereof to the mixer pump, and the rest including discharging the outside of the floating separation reaction unit, the coarse air supply member can discharge the coarse air bubbles inwardly below the floating separation reaction unit. It is characterized in that it is installed so that the flocculation floc precipitates in the reaction unit.

In addition, in step 2), a further mixing step is further included in step 2-1), wherein the additional mixing step is a mixing chamber member installed between the microbubble supply members in the mixer pump, where dissolved water is mixed by a vortex phenomenon. It is desirable to be able to.

In addition, it is preferable that the particles of the microbubbles are 20 µm or less, and the particles of the coarse bubbles are 20 µm or more.

In addition, the flocculation floc produced by step-by-step mixing in step 3) primarily generates a first mixture in which wastewater and micro bubbles are mixed with each other by a mixing means, and the first mixture and the flocculant are mixed by the mixing means. It is preferable to obtain the flocculation floc by secondary generation of a second mixture mixed with each other, and by mixing the polymer with the second mixture by the mixing means.

According to the present invention, the microbubbles are provided through the bubble generating unit so that the microbubbles adhere to the flocculation floss differently from the conventional one, but by using the coarse bubbles, which are another bubbles supplied from the bubble generating units in the floating reaction tank. The flocculation floc is prevented from sedimenting in the flotation reaction tank and floated on the surface of the water to facilitate removal of the flocculation floc.

In addition, the installation area is minimized, which is different from the conventional one, which has the effect of not restricting the installation location.

1 is a flow chart showing a water treatment method using floating separation according to the present invention.
Figure 2 is a conceptual diagram showing a wastewater treatment system using a water treatment method using floating separation according to the present invention.
3 is a conceptual diagram showing a bubble generating unit for FIG.
Figure 4 is a view showing the micro-bubble supply member for Figure 3;
5 is a view showing a collision tube for FIG. 4;
Figure 6 is another embodiment of Figure 4;
7 is a view showing a mixing chamber member for FIG.
8 is a view showing the flocculation reaction unit for FIG.
9 is a view showing a mixing means for Figure 8;
Figure 10 is another embodiment of the mixing means for Figure 9;
11 is a view showing a floating separation reaction unit for FIG.

Hereinafter, a water treatment method using floating separation according to the present invention (hereinafter simply referred to as a 'wastewater treatment method') will be described in detail with reference to the accompanying drawings.

First, as shown in Figure 1, the wastewater treatment method according to the present invention is largely 1) the step of obtaining dissolved water (S100), 2) the step of generating a micro-bubble and coarse bubbles (S200), 3) flocculation floc It comprises a step of generating (S300) and 4) removing the flocculation step (S400).

In more detail, step 1) (S100) is a step for generating bubble water composed of micro bubbles and coarse bubbles, which will be described later.

For example, the bubble water flows into the plurality of mixer pumps 110 through which the purified water from which the flocculation floc F has been removed through the by-product separation reaction unit 300, which will be described later, is flown into the plurality of mixer pumps 110, respectively. The micro-bubbles are supplied to the micro-bubble supply member 120 and the plurality of coarse-bubble supply members 130 through dissolved water in which the gas flowing into the pump 110 is dissolved at the same time, so that micro-bubbles and coarse bubbles can be generated.

In addition, the treated water used as the influent flowing into the mixer pump 110 is treated so that the treated water of about 20 to 40% of the total capacity of the treated water receiving tank 312 is introduced into the mixer pump 110 to be used. It is connected to the water receiving tank 312 and allows the remaining treated water not used as bubble water to be discharged to the outside.

In addition, the dissolved water flowing into the micro-bubble supply member 120 and the coarse-bubble supply member 130 may be supplied to have different capacities. The reason for this will be described in more detail in the bubble generation unit 100 described below. .

In addition, the step 2) (S200) is a step for supplying dissolved water to each other to generate fine bubbles and coarse bubbles.

For example, the mixer pump 110 so that the dissolved water obtained by the mixer pump 110 in the above-mentioned step 1) (S100) can be dividedly supplied to the micro-bubble supply member 120 and the coarse-bubble supply member 130, respectively. It is connected to the pipe, the supply ratio of about 50 to 70% of the micro-bubble supply member 120 when the amount of dissolved water flows into the coarse bubble supply member 130, the remaining 30 to 50% of the ratio Dissolved water is supplied so that micro bubbles and coarse bubbles can be generated respectively.

In addition, the particle size of the resulting micro-bubbles is 20 μm or less, and the particle size of the coarse bubbles can be limited to be 20 μm or more. The reason for this will be described in more detail below.

At this time, in step 2) (S200), the mixing chamber member 140 is further provided between the mixer pump 110 and the microbubble supply member 120 so as to easily generate bubbles satisfying the particle size of the microbubbles described above. It is preferable to further include an additional mixing step to maximize the dissolution rate of the treated water and the gas through the mixing chamber member 140.

Through this, it is easy to generate a microbubble having a high density when generating microbubbles having particles smaller than coarse bubbles with dissolved water, so that the retention time of the microbubbles with the flocculation floc (F) described later can be further increased. .

And, in step 3) (S300), the flotation aid 215 composed of the microbubbles and flocculants and polymers produced in step 2) (S200) described above can be mixed stepwise with wastewater to generate flocculation flocks (F). It is a step to do.

For example, the generation of the flocculation floc (F) is first, first mixing the waste water and the micro-bubbles to first generate the first mixture that is accommodated in the first tank 211, and the second mixture of the flocculant is mixed with the first mixture. Steps of a plurality of processes for accommodating the mixture in the second tank 212 and mixing the polymer with the generated second mixture to generate the flocculation floc F that can be accommodated in the third tank 213 in the third step It can be obtained by running with.

At this time, the mixing of the first to third mixtures are individually mixed in a plurality of mixing means 220 installed in the pipe 214 provided on the top of each tank 211, 212, 213 so that each mixture can be accommodated. desirable.

In addition, the third tank 213 accommodating the finally generated flocculation floc F has a pipe-connected structure so that the flocculation floc F can be introduced into the floating reaction tank 310.

In addition, the step 4) (S400) performs a purification process for removing the generated flocculation floc (F) from the floating reaction tank (310) to separately receive the purified water, and the plurality of mixer pumps described above. It is a step to provide a portion of it to 110.

For example, the flocculation floc F introduced into the purification treatment tank 311 formed by a plurality of partition walls 314 in the floating reaction tank 310 through the above-described step 3) (S300) is the buoyancy of the microbubbles. It floats on the water surface inside the floating reaction tank 310, and can be removed by the rotatable skimmer 320 installed on the floating reaction tank 310.

The flocculation floc F removed by the skimmer 320 is collected in a sludge receiving tank 312 forming a space divided by another partition wall 314, and although not shown, suctioned from the outside of the sludge receiving tank 313 The flocculation floc F accommodated inside the sludge accommodation tank 313 by the suction means (not shown) has a structure that can be discharged to the outside.

In addition, the treated water from which the flocculation floc F is removed is accommodated in the treated water receiving tank 312 formed inside the floating reaction tank 310 by another partition wall 314, and the treated water receiving tank 312 is provided in plural. It is connected to the mixer pump 110, so that a portion of the treated water can be introduced into each of the mixer pump 110.

At this time, the treated water flowing into the mixer pump 110 can be divided into about 20 to 40 parts by weight based on 100 parts by weight of the treated water, and these weight parts are generated or generated by the internal area of the purification treatment tank 311. It is desirable to be able to adjust according to the production amount of flocculation floc (F).

On the other hand, the flocculation floc (F) flowing into the purification treatment tank 311 prevents the phenomenon of sedimentation into the bottom surface of the purification treatment vessel 311 so that the flocculation floc (F) is formed on the surface of the water through a coarse air bubble. Make this injured.

Hereinafter, a water treatment system using floating separation for the wastewater treatment method according to the present invention described above with reference to the accompanying drawings (hereinafter simply referred to as 'wastewater treatment system') will be described in detail.

First, as shown in FIG. 2, the wastewater treatment system 1 according to the present invention largely includes a bubble generation unit 100, a flocculation floc reaction unit 200, and a floating separation response unit 300.

In more detail, as shown in FIGS. 2 to 5, the bubble generating unit 100 uses bubbles of dissolved water mixed with inflow water and gas (eg, oxygen or ozone) introduced from the outside. As a configuration for generating the number of bubbles that can be generated, for example, a plurality of mixer pumps 110, a micro-bubble supply member 120 and at least one coarse-bubble supply member 130.

Referring to FIG. 2, each mixer pump 110 is pipe-connected so that the treated water of the floating separation reaction unit 300, which will be described later, can be supplied, and the other end is a micro-bubble supply member 120 and a coarse-air supply member. It is installed in a pipe-connected structure so that the bubble water can be jointly supplied to 130.

At this time, the inflow water supplied to the mixer pump 110 is installed in a structure in which a portion of the treated water purified by the floating separation reaction unit 300 can be introduced, and the inflow water and It is preferable that a gas inlet pipe through which a gas for dissolving flows is further installed (see FIG. 11).

Dissolved water generated by each mixer pump 110 is formed so that the supplied gas is rapidly sheared so that it can be dissolved together with the treated water, and coarse with the micro-bubble supply member 120 through the mixer pump 110 The ratio of the dissolved water that is jointly supplied to the bubble supply member 130 is supplied to have a ratio of 50 to 70% to the micro bubble supply member 120 and 30 to 50% to the coarse bubble supply member 130.

Here, the reason why the relatively small proportion of dissolved water is supplied to the coarse bubble supply member 130 is that the coarse bubble generated through the coarse bubble supply member 130 is the flocculation floc (F) in the floating separation reaction unit (300). Precipitation is prevented, but since the flocculation floc (F) is intended to move in one direction by the discharge pressure generated when discharging the coarse bubbles, it is used at a lower rate than the dissolved water supplied to the microbubble supply member 120. This is because the above-described effect can be satisfied (see FIG. 11).

In addition, a check valve (not shown) capable of opening / closing control to a control signal is installed on the micro-bubble supply member 120 and the coarse-air supply member 130, which are connected to each mixer pump 110, and are selectively selected according to the operator's selection. Can be used as

As shown in FIG. 4, the micro-bubble supply member 120 has a nozzle body 121, a cover body 124, and a collision tube in a configuration for generating dissolved water supplied through the mixer pump 110 into micro-bubbles. 125).

The nozzle body 121 is one end is connected to the mixer pump 110 or the mixing chamber member 140 so that the dissolved water can be introduced into the nozzle body 121, the other end is a flocculation floc reaction unit 200 It is connected to the tube so that the micro-bubbles generated through the micro-bubble supply member 120 can be supplied.

The other end of the nozzle body 121 may be formed with a plurality of distribution holes 122 radially on its outer surface, the length of the nozzle body 121 according to the capacity of the micro-bubbles to be introduced into the flocculation reaction unit 200 It is formed adjacent to each other in the direction to have a structure that can increase the capacity of the micro-bubbles.

At this time, a plurality of distribution holes 122 are perforated to the nozzle body 121 to have an inclination angle in one direction so that a vortex phenomenon occurs in the melted water discharged through the distribution holes 122 to have a structure that can be discharged. It is desirable to do.

Thus, the melted water flowing into the nozzle body 121 by the discharge pressure of the mixer pump 110 is discharged to have a vortex phenomenon through a plurality of distribution holes 122, and when colliding with the collision tube 125 to be described later In addition, it is possible to maximize the generation rate of microbubbles by increasing the impact.

The cover body 124 is made of a hollow tube shape, as shown, the lower portion is coupled so that the airtight and the other end of the nozzle body 121 can be maintained, the upper surface of the flocculation floc reaction unit 200 on the outer surface It is formed to have a structure that can be inserted into the extended connection tube so that it can be easily supplied into the coagulation floc reaction unit 200 through the connection tube without leaving the generated micro bubbles,

At this time, the lower portion of the cover body 124 is made of a tubular shape having an inner diameter larger than the outer diameter of the nozzle body 121 so that a space for vortexing the melted water discharged through the distribution hole 122 can be secured, and the distribution hole (122) It is preferable to be coupled to the other end of the nozzle body 121 so that the whole is wrapped.

The upper surface of the cover body 124 has a structure in which a plurality of opiris 123 are perforated symmetrically to each other so that micro bubbles generated by the collision tube 125 can be easily introduced into the connection tube.

At this time, the inner wall of the opiris 123 has a shape of a concave venturi pipe in the longitudinal direction so that the venturi effect is easily generated, and the microbubbles before entering the connecting pipe collide with each other. It is desirable to be able to generate bubbles of a desired particle size.

Referring to FIG. 4, the tube body 126 is formed in a column shape as a whole, but the hollow part 127 through which the melted water passes from the top surface to the bottom surface is formed with a perforated shape based on an arbitrary center point P of the tube body 126. Have

At this time, inside the hollow portion 127, a plurality of impingement walls 128, each of which has a plurality of bubble forming holes 129, are formed adjacent to each other in the longitudinal direction, so that the melted water flowing into the hollow portion 127 collides. It is desirable to be able to generate fine bubbles.

For example, as shown in FIG. 5, each of the bubble forming holes 129a and 129b is perforated to have a shape of an upper and lower canal narrowing in diameter in one direction, and the bubble forming hole 129a , 129b) is formed so as not to face each other on the pair of collision walls 128 provided adjacent to each other, and at the same time, the shapes of the upper and lower ganglia are arranged so that they do not coincide with each other on the vertical line (relative to the drawing). Dissolved water penetrating the wall 128 temporarily stays in a certain section, and rapidly penetrates the crash wall 128 in a certain section to maximize the collision effect so that the generation rate of fine bubbles can be further increased.

That is, in the section in which the bubble forming hole 129a that first penetrates through the bubble forming holes 129a and 129b formed in the plurality of impinging walls 128 is formed, the diameter of the solution so that the dissolved water temporarily stays It is formed to have a shape that is narrowed and widened, so that the melted water passing through the bubble forming hole 129a collides with the collision wall 128 so that micro-bubbles can be generated, and the melted water that has been collided is another bubble again. It is arranged to have a shape in which the diameter is widened and narrowed so that it can be easily introduced into the production hole 129b so that the generated bubbles rapidly penetrate and collide with other collision walls 128.

On the other hand, referring to Figure 6, the bubble generating unit 100 in the present invention, the pipe is connected between the above-described mixer pump 110 and the micro-bubble supply member 120 is dissolved water dissolved in the mixer pump 110 It further includes a mixing chamber member 140 that can maximize the degree of dissolution of, for example, the mixing chamber member 140 includes a chamber 141 and the mixing plate 145 (see FIG. 3).

The chamber 141 is made of a hollow housing shape, but one end is connected to the mixer pump 110 so that the melted water can be introduced therein, and the other end is connected to the nozzle body 121 and the pipe to be mixed plate 145. It has a structure that can be supplied to the dissolved water is dissolved.

On the inner wall of the chamber 141, a plurality of mixing plates 145 and 145 'have the same distance from each other, but a coupling groove adjacent to each other so as to prevent the flow of the mixing plates 145 and 145' by the pressure at which dissolved water flows in (not shown). This is further formed so as to fit and fit the outer surface of the mixing plate (145,145 ') in a shape fit.

The mixing plates 145 and 145 'are formed in a plurality of longitudinal directions inside the chamber 141, and the ring plate 142 and the ring plate 142 are configured to allow mixing while the dissolved water passing from one end of the chamber 141 to the other end penetrates. And ribs 144.

As shown, the ring plate 142 is formed of a module such that a plurality of bodies having ring diameters having different diameters form concentric circles, and at least two or more of the ring plates 142 are radially formed with a plurality of ribs 144 It has a structure that is connected to each other by.

At this time, the plurality of ring plates 142 connected by a plurality of ribs 144 is to form an inlet hole 143 between the ribs 144 so that the melted water can penetrate through the inlet hole 143. desirable.

In addition, the ribs 144 provided on the ring plate 142 provided with each module are formed to face each other so that they do not have the same shape, so that the dissolution rate of the dissolved water can be maximized.

That is, when the inlet hole 143 formed in the ring plate 142 provided in the longitudinal direction in the chamber 141 sequentially passes through the melted water, when the melted water penetrates, the ribs 144 are disposed at different positions. It is stirred to maximize the dissolution rate of dissolved water consisting of gas and influent water.

To this end, the ribs 144 may be formed to have various shapes such as straight lines and curved lines.

As shown in FIGS. 3 and 11, the coarse air bubble supply member 130 provided with at least one or more is supplied with melted water to generate coarse air bubbles, but supplies the coarse air bubbles to the floating separation reaction unit 300 to flocculate flocs. In order to prevent precipitation of (F) and to allow the flocculation floc (F) to move in one direction, it has the same structure as the micro-bubble supply member 120 described above, and has been described above so as not to obscure the subject matter of the present invention. It will be replaced by the description of the micro-bubble supply member 120.

However, unlike the micro-bubble supply member 120 described above, the coarse-air supply member 130 in the present invention generates coarse air bubbles through dissolved water flowing directly from the mixer pump 110 connected to one end. The other end is connected to at least one place below the floating reaction tank 310 of the floating separation reaction unit 300, which will be described later, so that the coarse air bubbles can be discharged inside the floating reaction tank 310.

At this time, the coarse air supply member 130 is connected to the lower side of the flotation reaction tank 310 (preferably in a position symmetrical to the treated water receiving portion) to the coarse air bubbles discharged into the flotation reaction tank 310 and the coarse air bubbles It is preferable that the flocculation floc F is brought into contact with the flocculation floss F (including coarse bubble discharge pressure) and floats, and furthermore, the flocculation floc F can move in the direction of the treated water receiving tank 312 (FIG. 11).

In addition, the coarse air bubbles generated through the coarse air bubble supply member 130 are formed to be larger than the appropriate size of the microbubbles 20 μm to cause the cohesive floc F to float to the surface by contact with the cohesive floc F. Make it possible.

And, as shown in Figures 8 to 11, the flocculation flop reaction unit 200 is a configuration for mixing the above-described microbubbles and at least one flotation aid 215 to produce flocculation flocks (F). It includes a mixing tank 210 and the mixing means 220.

As shown in FIG. 8, the mixing tank 210 is installed to have a pipe-connected shape adjacent to each other, but sequentially to each of the mixing tanks 210 in the direction of the floating reaction tank 310 from the micro-bubble supply member 120. Have a structure that can be moved.

For example, the mixing tank 210 in the present invention is connected to the first tank 211 and the first tank 211, in which the first mixture in which the waste water and the microbubbles are made is connected, but one of the floating aids 215 Phosphorus flocculant and the first mixture are mixed with each other to form a second mixture, the second tank 212 and the second tank 212 are connected to the pipe, but one of the flotation aids 215 is a polymer and the second mixture The mixing may include a third tank 213 that sequentially passes through a plurality of mixing steps to finally generate a flocculation floc F.

Meanwhile, mixing means 220 may be provided inside each of the first to third tanks 211, 212, and 213 to mix and produce the first mixture, the second mixture, and the flocculation flocks F, and the mixing means 220 ) Is made of a plate shape, as shown, is installed inside the first to third tanks 211, 212 and 213, respectively, so that two or more substances can be mixed by a vortex phenomenon.

For example, referring to FIG. 9, the mixing means 220 is formed of a circular plate shape having a predetermined diameter as a whole in the first embodiment, but consists of a vortex plate 221 in which a plurality of vortex forming holes 222 are drilled radially. do.

Here, the vortex forming holes (222, 222-1) formed in the plurality of mixing means (200,200-1) provided in a plurality of neighbors in the longitudinal direction inside the first tank (211) are disposed so as not to face each other, the first mixture by vortex Make it easy to form.

The vortex plate 221 is provided with a plurality of adjacent to each other in the longitudinal direction in the first tank 211 in which wastewater and micro-bubbles flow together, but the vortex forming holes 222 formed in each vortex plate 221 face each other. It is installed in such a way that a vortex phenomenon can occur so that wastewater and micro bubbles can be mixed with each other.

At this time, the plurality of vortex forming holes 222 radially perforated may be formed so that the connecting holes 223 connected to each other in the center of the vortex plate 221 can be formed, and the connecting holes 223 The formed vortex plate 221 is preferably to have a structure so that the connection hole 223 can be disposed between a pair of vortex plates 221 that are not formed.

Through this, a vortex plate (221,222-) in which a connection hole (223) is not formed in the first tank (211) by passing through a plurality of vortex plates (221,221-1) and wastewater to be formed into the first mixture 1) In the part, wastewater and micro-bubbles stay and mix for a while, but in the vortex plate 221,2221-1 where the connecting hole 223 is formed, it rapidly progresses to perform a repetitive operation that easily causes a vortex phenomenon. This will maximize the mixing rate.

Also, the mixing means 220-2, unlike the first embodiment described above, as shown in the second embodiment, to form one vortex forming hole 222-2 in the vortex plate 221-2. It can be (see Fig. 10 (a)).

At this time, the vortex forming holes 222-2, which are perforated in each of the vortex plates 221-2, which are provided adjacent to each other in the second tank 212, are disposed so as not to face each other so that the wastewater and micro bubbles are disposed in the piping ( It is preferable that the 214 is disposed so that a vortex phenomenon may occur when passing through.

Unlike the first embodiment, the mixing means 220-2 according to the second embodiment increases the time that the wastewater and microbubbles to be mixed can stay in each vortex plate 221 so that the microbubbles adhere to the wastewater. You will have the advantage of securing the time you can.

In addition, the mixing means (220-3), as shown, in the vertical or horizontal direction to each vortex plate (221-3) provided with a plurality of adjacent to each other along the longitudinal direction of the third tank 213 in the third embodiment As a pair of vortex forming holes 222-3 are perforated to form a structure in which wastewater and micro bubbles passing through the third tank 213 can be mixed with each other by a vortex phenomenon (Fig. 10). (See (b)).

At this time, the vortex forming holes 222-3 are disposed so as not to face each other with the vortex forming holes 222-3 formed in the plurality of vortex plates 221-3 disposed inside the third tank 213 facing each other. The vortex forming holes 222-3 are perforated in a 'T' shape consisting of the head forming holes 222-3a and the fitting holes 222-3b as a whole, and the head forming holes 222-3a It is preferred that the silver is perforated to have a semicircular shape.

The third embodiment is formed to satisfy the effects of the first and second embodiments described above. When the polymer and the second mixture passing through the third tank 213 pass through the third tank 213, The vortex phenomenon can easily occur through the head forming holes 222-3a that are not disposed to face each other, and the corresponding wastewater and micro bubbles are formed in the respective vortex plates 221-3 through the joint holes 222-3b. By staying for a while, the microbubbles have the advantage of securing the time to stick to the wastewater.

In addition, the mixing means (220,220-2,220-3) in the present invention can be used for mixing purposes for generating a flocculation floc as well as the first and second mixtures by selecting any one of the first to third embodiments.

In addition, the floating separation reaction unit 300 is configured to obtain purified water by removing the flocculation floc F generated through the flocculation floc reaction unit 200 described above, as shown in FIG. 11. It includes a floating reaction tank 310 and a skimmer 320.

For example, the floating reaction tank 310 has a hollow housing shape as a whole, but is accommodated in the generated flocculation flocks F so that the flocculation flocks F float on the water surface and can be removed through the skimmer 320 described below. Have

The interior of the floating reaction tank 310 allows a space partitioned from each other by a plurality of partition walls 314, and the divided space is a purification treatment tank 311 for removing the flocculation floc F as shown in the figure. , A treated water receiving tank 312 in which purified water is received and a sludge receiving tank 313 in which the removed flocculation flocks F are accommodated and discharged to the outside.

At this time, the inside of the purification treatment tank 311 is a guide plate for guiding the discharge of coarse air bubbles for floating the flocculation floc (F) sedimented to the bottom of the purification treatment tank 311 onto the water surface. (315) is installed to have a length in the vertical direction, the guide plate 315 is formed to have an inclination at a predetermined angle, and at the same time, the upper portion is bent and the flocculation floc (F) is stably precipitated by coarse air bubbles. It is desirable to be able to.

The purification treatment tank 311 is formed so that the inside of the treated water receiving tank 312 can communicate with each other, but preferably prevents the flocculation floc F from flowing into the treated water receiving tank 312. It is formed so as to connect to each other under the purification treatment tank 311, and a separate filter (not shown) is provided at the joint, so that foreign matters that cannot be removed are introduced into the treatment water receiving tank 312. Prevent things.

The purification treatment tank 311 is connected to the flocculation floc reaction unit 200 so that the flocculation floc F can flow into the purification treatment vessel 311, the lower portion of which is at least one coarse bubble supply member. It is connected to the pipe 130 and has a structure in which coarse air bubbles can be discharged from the inside of the purification treatment tank 311.

In addition, a skimmer 320 is installed on the upper portion of the purification treatment tank 311 so that the skimmer 320 can remove the flocculation floe F floating on the surface of the purification treatment tank 311.

The treated water receiving tank 312 is dividedly formed through a partition wall 314 on one side of the purification treatment tank 311, but the lower portion thereof is formed to communicate with the purification treatment tank 311 to remove the aggregated floc F. Make it acceptable.

The lower portion of the treated water receiving tank 312 is connected to the mixer pump 110 described above, and a portion of the treated water (about 20-40%) flows into the mixer pump 110 to generate micro bubbles or coarse bubbles. It is used as water, and the rest of the treated water (about 60 ~ 80%) has a structure that is discharged to the outside.

The sludge receiving tank 313 forms a space divided by the partition wall 314 between the purification treatment tank 311 and the treated water receiving tank 312, and the agglomeration to be removed is obtained through the skimmer 320 to be described later. Flock (F) is accommodated has a structure that can be discharged to the outside of the sludge receiving tank (313).

The upper portion of the sludge receiving tank 313 has an open shape so that the flocculation floc F continuously walked in the skimmer 320 can be quickly received, and a predetermined angle in the lower direction of the purification treatment tank 311. At least one inflow prevention plate 316 is installed so as to increase the effect of blocking the inflow of foreign substances or flocculation flocks of the treated water flowing from the purification treatment tank 311 to the treated water receiving tank 312. do.

The skimmer 320 is a belt-shaped belt configured to provide the sludge receiving tank 313 to be accommodated in the above-described sludge receiving tank 313 by rotating the flocculation floc F floating on the water surface of the purification treatment tank 311 by rotation. 321 and the belt 321 is made of a conventional conveyor method consisting of a plurality of rollers 322 rotatably installed by a drive motor (not shown) inside.

The skimmer 320 is located on the upper portion of the purification treatment tank 311, but its lower portion is installed to be close to the water surface so that the flocculation floc F floating on the water surface can be removed by rotation.

At this time, a hook 324 having a straight or curved shape is formed on the outer surface of the belt 321 constituting the skimmer 320 to have an easy structure to remove the flocculation flock, and the belt 321 is lifted up. It is preferable that a plurality of through holes 323 are perforated so that moisture generated in the flocculation floc F passes through the belt 321 and is received again in the purification treatment tank 311.

Meanwhile, when a plurality of coarse air bubble supply members 130 are installed under the purification treatment tank 311 in the present invention, only one of the coarse air bubble supply members 130 is operated through a control signal of a control unit (not shown). Note that a selection switch (S / W) can be further provided to be used.

The wastewater treatment system 1 according to the present invention having such a configuration provides the microbubbles through the bubble generating unit 100 so that the microbubbles adhere to the flocculation floc F differently from the conventional one, but the floating reaction tank ( 310) prevents the flocculation floc (F) from sedimenting in the flotation reaction tank (310) by using coarse bubbles, which is another bubble supplied from the bubble generating part (100), thereby floating above the water surface. To facilitate removal of the flock (F).

In addition, the installation area is minimized, which is different from the conventional one, which has the effect of not restricting the installation location.

In the above, specific examples of the present invention have been described above. However, the spirit and scope of the present invention are not limited to these specific embodiments, and various modifications and variations are possible within a range that does not change the gist of the present invention. If you grow up, you will understand.

Therefore, the above-described embodiments are provided to fully inform the person of ordinary skill in the art to which the present invention pertains, the scope of the invention, and should be understood as illustrative in all respects and not restrictive. The invention is only defined by the scope of the claims.

100: bubble generating unit 110: mixer pump
120: fine bubble supply member 130: coarse bubble supply member
140: mixing chamber member 200: flocculation block reaction unit
210: mixing tank 220: mixing means
300: floating separation reaction unit 310: floating reaction tank
320: skimmer F: flocculation floc

Claims (4)

1) generating a dissolved water in which the treated water and the gas are dissolved by supplying the treated water formed inside the floating reaction tank 310 to the mixer pump 110 through which the gas flows;
2) dividing the dissolved water discharged from the mixer pump 110 at a predetermined ratio to supply to the micro bubble supply member 120 and the coarse bubble supply member 130, respectively, to generate micro bubbles and coarse bubbles;
3) After supplying the generated microbubbles to the flocculation floc reaction unit 200 into which the flotation agent 215 composed of wastewater, flocculant, and polymer flows, and mixing with each other step by step, the flocculation floc (F) having the microbubbles adhered to it Generating, supplying the generated flocculation floc (F) to the floating separation reaction unit 300; And
4) Obtain the treated water that has been purified by removing the flocculation floc (F) supplied to the floating separation reaction unit 300, separately receive the treated water and supply some of the treated water to the mixer pump 110, Including the rest; discharging the floating separation reaction unit 300 to the outside;
The coarse air bubble supply member 130 is installed to discharge coarse air bubbles to the bottom of the flotation separation reaction part 300, so that the coagulation floc F is settled in the reaction part 300. Water treatment method using floating separation, characterized in that.
According to claim 1,
In step 2), further mixing is performed in step 2-1);
The additional mixing step is a mixing chamber member 140 installed between the micro-bubble supply member 120 in the mixer pump 110, so that melted water can be mixed by a vortex phenomenon. Water treatment method.
According to claim 1,
The microbubbles have a particle size of 20 μm or less, and the coarse bubbles have a particle size of 20 μm or more.
According to claim 1,
The flocculation floc (F) produced by mixing step by step in step 3) is
A first mixture of wastewater and micro-bubbles mixed with each other by the mixing means 220 is first generated, and a second mixture of the first mixture and the coagulant mixed with each other by the mixing means 220 is secondarily generated. And, the second mixture is a water treatment method using flotation separation, characterized in that to obtain the flocculation floc (F) by the third generation of mixing the polymer with each other by the mixing means (220).

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