KR101779748B1 - System for water treatment - Google Patents

Abstract

According to the present invention, a water treatment system capable of maximizing coagulation efficiency between a coagulant and a suspended material by forming a swirling vortex or a circulating water flow in a chamber with the coagulant-injected wastewater inside the chamber and floating the floating material using the fine bubbles can be effectively removed / RTI > Thus, the flocculant is completely dissolved by swirling the sewage into which the flocculant is injected in the flocculation chamber, thereby maximizing the flocculation efficiency between the flocculant dissolved in a short time and the suspended substance.

Description

SYSTEM FOR WATER TREATMENT

The present invention relates to a water treatment system, and more particularly to a water treatment system that maximizes coagulation efficiency between a coagulant and a suspended material by forming a swirling vortex or a circulating water flow in the chamber, and float the floating material using fine bubbles And more particularly, to a water treatment system capable of effectively removing water.

In general, a sewage treatment process composed of a rapid stirring tank, a slow stirring tank, and a floating separation tank is used to purify sewage (wastewater) containing various pollutants. Here, in the rapid-stirring tank, a flocculant such as Alum is mixed with sewage, and the micro-suspended material is first aggregated and discharged to the slow stirring tank. In the slow stirring tank, the suspended solids Is flocculated to a size capable of flotation separation in the flotation separation vessel and discharged to the flotation separation vessel disposed at the downstream end.

Here, in the case of the conventional rapid stirring tank, there is a problem that the upper part is opened and the odor in the sewage water spreads to the outside. The coagulant flows into the sewage through the opened upper part and the time required until the coagulant, And the flocculation efficiency of the suspended substances contained in the sewage is lowered.

Also, in the conventional slow stirring tank, an auxiliary coagulant is injected into the sewage introduced into the inside for the flocculation of suspended solids, and a separate mechanical stirrer for forming circulating water in the stirring tank to induce flocculation by contact between particles of the suspended material Respectively.

In addition, in the case of the conventional slow stirring tank, since an impeller-type mechanical stirrer for rotating the sewage in the stirring tank is installed to form the circulating water stream, the mechanical stirrer must be driven continuously for sewage treatment. Cost and maintenance cost increase. In addition, since the conventional slow stirring tank has a clogging structure in which the upper part is opened, there is a problem that the malodor diffuses to the periphery if the mechanical stirrer is driven.

Conventionally, fine bubbles are injected into a reaction tank into which sewage flows, so that organic substances (SS) and chemical sludge (Al + PO ₄ ^-3 → AlPO ₄ ) contained in the sewage adhere to fine bubbles and float above the water surface A floating separation device has been developed which purifies flocculated organic material and chemical sludge in such a way as to filter it from the top.

However, in the conventional flotation apparatus, since the reaction tank has a single structure, the organic substances and the chemical sludge that are not adsorbed by the fine bubbles are discharged to the treated water as they are.

Korean Unexamined Patent Application Publication No. 2000-0017670 (April 04, 2000), a method for treating wastewater of high-speed flocculation sedimentation type. Patent Document No. 10-0941387 (Feb. 02, 2010), an integrated continuous batch coagulating sedimentation device capable of removing organic matter from the waste water and waste water (T-P). Korean Patent Publication No. 2012-0138025 (2012.12.24), floating separation device.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a coagulation apparatus and a coagulation apparatus which are capable of completely dissolving the coagulant by swirling the wastewater into which the coagulant is injected, And to provide a water treatment system that maximizes the efficiency of water treatment.

Another object of the present invention is to provide a structure in which the inside of the coagulation chamber is divided into a plurality of coagulation tanks divided into upper and lower coagulation tanks and the sewage of each coagulation tanks is introduced into the adjacent coagulation tanks arranged at the lower portion by the dropping, In which the fine suspended solids contained in the sewage are circulated in the inside by the water stream and are brought into mutual contact with each other so as to be agglomerated to a predetermined size.

It is a further object of the present invention to provide a method and apparatus for controlling the flow of suspended microbubbles by limiting the flow of temporary microbubbles in a stepwise manner through a multi-stage partition structure with respect to the flow direction of the sewage, And to provide a water treatment system using fine bubbles capable of minimizing suspended solids discharged from the treatment water.

In order to achieve the above object, the water treatment system according to the present invention includes a first flocculation chamber 210 having a watertight inner space 211 and provided with a sewage inlet 212 and a sewage outlet 213, A rotary shaft 220 rotatably and vertically disposed in the space 211 and formed with a flocculant discharge port 221 for discharging the flocculant supplied from the outside to the internal space 211, And a stirring wing (230) for forming a vortex; A second agglomeration chamber 310 having a watertight inner space formed therein and having a sewage inlet 311 connected to the sewage outlet 213 of the high speed coagulation apparatus 200 and a sewage outlet 312 formed at the lower portion thereof, A partition wall 320 is formed in the second coagulation chamber 310 to divide the inner space into a plurality of coagulation tanks 321 divided into upper and lower portions and a communicating hole 322 opened upward and downward, And a turbulence prevention plate (330) horizontally disposed at a lower position of each communication hole (322); And a watertight inlet space 412 connected to the drainage outlet 312 of the non-moving-flux flocculation apparatus 300 is formed at one side thereof, a treated water outlet 413 is formed at the other side thereof, And a plurality of upper partitions 415 extending in the lower direction from the upper part are alternately arranged on the lower part and the upper part of the reaction chamber 416, 410 and a scum skimmer 400 including a bubble generator 420 for generating a micro or nano-sized fine bubble and supplying it to the inner space.

Here, the high-speed coagulation apparatus 200 is formed in an upright-positioned plate shape, and one side is fixedly mounted on the inner wall of the first coagulation chamber 210 and a plurality of them are spaced apart along the inner wall of the first coagulation chamber 210 And a flow obstruction plate 240 disposed therein.

The sewage inlet 212 of the high-speed flocculation apparatus 200 is connected to the other end of the sewage supply pipe 250 connected to the flow rate control tank 110 at one end, And a sewage sensor 260 disposed in the sewage inlet 212 for measuring the concentration of the sewage supplied from the sewage inlet 260. The sewage sensor 260 measures the concentration of the sewage supplied to the high- And a control unit 500 for controlling the supply amount of the gas.

The high speed coagulation apparatus 200 further includes a rotary joint 270 for supplying a coagulant to the upper end of the flocculation conveyance pipe 222 which is connected to the upper end of the rotation shaft 220 and is vertically extended inside the rotary shaft 220, ).

In addition, the non-dynamic flux flocculation apparatus 300 may be formed with an inclined portion 331 inclined upwardly toward the outer side of the end portion of the turbulence prevention plate 330.

The inclined surface 323 may be inclined upwardly toward the outer side of the edge of the barrier rib 320 or may be inclined upward gradually toward the outer side of the edge of the barrier rib 320 .

The non-dynamic flux flocculation apparatus (300) further includes a pressure control pipe (340) disposed on the second flocculation chamber (310) and discharging air in the internal space according to a control signal, And a controller 500 for controlling the pressure control tube 340 to maintain the set value when the internal pressure of the second agglomeration chamber 310 exceeds a predetermined value.

The scum skimmer 400 is disposed on the upper part of the reaction chamber 410 and rotatably rotates the rotator 432 having a plurality of skimmers 431 mounted on the outer surface thereof, And a floating sludge discharge unit 430 for scraping the floating sludge floated on the upper end of the reaction tank 416 and discharging the floated sludge to the outside.

A round portion 440 disposed at the upper end of the upper partition wall 415 and having an upwardly concave hemispherical shape and guiding the transfer of suspended solids conveyed from the upper side of the bubble reaction tank 416 adjoined by the skimmer 431 .

The scum skimmer 400 is formed at an upper end of one side wall of the reaction chamber 410 so as to protrude outwardly and obliquely so as to be in contact with the surface of the skimmer 431 pivoting at one side end position of the reaction chamber 410, And a water removing unit 450 for scraping off moisture adhering to the skimmer 431.

The reaction chamber 410 has a fine bubble inlet 421 for injecting fine bubbles into one side of the reaction chamber 410 and a fine bubble inlet 421 through the bubble reaction tank 416 and a treated water outlet 413 And the bubble generator 420 is connected to the process water transfer line 421 connected between the processing water supply port 424 and the fine bubble inlet 421. The processing water supply line 424 is connected to the processing water supply line 424, The scum skimmer 400 scatters the scum skimmer 400 and the scum skimmer 400. The scum skimmer 400 scatters the scum skimmer 400 and the scum skimmer 400, And a plurality of strainer (460) disposed between the bubble generator (420) and the water supply hole (424) on the bubble generator (470) to remove foreign matters from the treated water supplied to the bubble generator (420) Are connected to different branch lines 471 And a solenoid valve 480 for opening and closing the conduit is disposed in each of the separation lines 471 in accordance with a control signal and a pressure gauge 422 provided in the bubble generator 420 is connected to the processing water transfer line 470. [ And a control unit 500 for controlling the opening and closing states of the solenoid valves 480 according to the digital signal values of the solenoid valves 480.

On the other hand, the upper partition wall 415 disposed at the rear end of the plurality of upper partitions 415 is provided with an upper part having a relatively longer length than the swing height of the skimmer 431 pivoting at the end position of the rotating body 432 And a sludge leakage preventing wedge 490, which is formed to extend roundly along the turning curve of the skimmer 431, may be mounted.

According to the water treatment system of the present invention,

First, the flocculant is completely dissolved by swirling the wastewater into which the flocculant is injected in the flocculation chamber, thereby maximizing the flocculation efficiency between the flocculant dissolved in a short time and the suspended substance.

Second, since the inside of the coagulation chamber is divided into a plurality of coagulation tanks divided into upper and lower coagulation tanks, and the sewage of each coagulation tank is introduced into the adjacent coagulation tanks arranged at the lower part by the dropping, the circulating water is generated. It is possible to reduce the facility cost and the maintenance cost by allowing the fine floating matters contained in the sewage to circulate in the interior by the water flow and to be brought into contact with each other and to be agglomerated to a certain size.

Thirdly, it is possible to purify the suspended bubbles in a short period of time by removing the suspended particulate matter while keeping the saturated bubble state by restricting the outflow of the bubbles temporarily in a stepwise manner through the multi-stage partition structure with respect to the flow direction of the sewage. The suspended solids contained in the water can be minimized.

1 is a schematic diagram showing the overall configuration of a water treatment system according to a preferred embodiment of the present invention,
2 is a cross-sectional side view showing the structure of a high-speed coagulation apparatus according to a preferred embodiment of the present invention,
3 is a side cross-sectional view showing the configuration of a non-powered flux flocculation apparatus according to a preferred embodiment of the present invention,
FIG. 4 is a side sectional view showing the configuration of a skimmer according to a preferred embodiment of the present invention,
5 is a schematic view for explaining an operation principle in which a plurality of strainer is alternately used according to a preferred embodiment of the present invention,
6 is a side cross-sectional view showing a configuration of an ozone treatment apparatus according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

Before describing the embodiments of the present invention, some terms to be described below are defined. The term 'sewage' mentioned below is a wastewater containing various pollutants. It is a wastewater containing various pollutants, including sewage water (CSO), purified water such as water-bloom, living water, factory wastewater, leachate, manure, . Therefore, the 'suspended matter' contained in the sewage mentioned below means various kinds of pollutants including chemical sludge and high concentration organic matter, as well as contaminants contained in a large amount in the rain.

The term "coagulation" as used herein refers to a phenomenon in which suspended solids are entangled by mutual contact to form a large lump. Hereinafter, the term "coagulation" generally refers to a phenomenon of coagulation in a larger lump The term "flocculation" shall not be distinguished from the meaning of "flocculation".

1, a water treatment system according to a preferred embodiment of the present invention includes a high-speed flocculation apparatus 200, a non-moving-type flocculation apparatus 300, and a scum skimmer 400 arranged stepwise along the treatment transfer direction of sewage So that the purification efficiency of the sewage can be maximized.

First, the high-speed flocculation apparatus 200 replaces the function of a conventional rapid-stirring tank by swirling the inflowed sewage in the first flocculation chamber 210 to completely dissolve the flocculant, As shown in FIG. 2, a device for maximizing flocculation efficiency between suspended solids includes a first flocculation chamber 210 in which a watertight inner space 211 is formed and a drainage inlet 212 and a drainage outlet 213 are provided, respectively, A rotation shaft 220 rotatably and vertically disposed in the internal space 211 and formed with a flocculant discharge port 221 for discharging the flocculant supplied from the outside into the internal space 211, And a stirring wing 230 that rotates together to form a vortex.

Here, the first flocculation chamber 210 is preferably formed of a tank type which is sealed to prevent the odor of the inflowed sewage from leaking to the outside, and is made of a material excellent in corrosion resistance and wear resistance such as SUS.

In addition, the sewage introduced into the lower portion of the first flocculation chamber 210 is circulated and swirled in the chamber by the stirring wing 230, and at the same time, the flocculant is supplied through the flocculant outlet 221, The flocculated suspended matter is discharged together with the sewage to the sewage discharge port 213 and the auxiliary coagulant is injected into the sewage introduced into the sewage inlet 212 to increase the flocculation effect. A sewage supply pipe 290 is connected to the sewage discharge port 213 to supply sewage discharged to the sewage inlet 311 of the non-powered floc coagulation apparatus 300.

The rotating shaft 220 is a rotating shaft for rotating the stirring wing 230 which swirls the flowing wastewater and the flocculating agent in the second flocculating chamber 210. The flocculating agent is supplied to the coagulant outlet 221 The flocculation agent conveying pipe 222 is vertically disposed.

The rotation shaft 220 is rotatably supported at the upper end of the first flocculation chamber 210 through a rotating means such as a bearing and is provided at one side thereof with a drive motor (not shown) (280). The driving motor 280 is electrically connected to an inverter (not shown) to control the rotational speed and the rotational direction of the rotating shaft 220 by adjusting the frequency of the driving power through the inverter.

The stirring wing 230 may include a first stirring blade 231 disposed radially at a position above the rotation shaft 220 in the first aggregation chamber 210 and a second stirring blade 231 disposed on the rotation shaft 220, And a second stirring blade 233 radially arranged at a lower position of the blade 231. Each of the stirring blades 231 and 233 has through holes 232 and 234 opened laterally so that each of the stirring blade blades 231 and 232, (Vane portion) and the non-pressurized portion (through-hole portion), which maximizes the formation of vortices due to the rotation of the stirring vane 230.

The high-speed coagulation apparatus 200 is formed in an upright plate shape, and is fixedly mounted on the inner wall of the first coagulation chamber 210, and a plurality of the coagulation apparatuses 200 are disposed along the inner wall of the first coagulation chamber 210 The water flow obstruction plate 240 may include a water flow obstruction plate 240. The water flow obstruction plate 240 rubs with the rotating wastewater in the first flocculation chamber 210 in accordance with the rotation of the stirring wing 230 so as to form a vortex in a direction opposite to the swirling vortex direction, The coagulation efficiency can be further increased.

The sewage inlet 212 of the high-speed flocculation apparatus 200 is connected to the other end of the sewage supply pipe 250 connected to the flow rate control tank 110 at one end, Or a sewage sensor 260 disposed in the sewage inlet 212 for measuring the concentration of the sewage supplied.

In addition, the control unit 500 for centrally controlling the operation of the water treatment system adjusts the supply amount of the flocculant supplied to the high-speed flocculation apparatus 200 according to the detection signal of the sewage sensor 260, The amount of the coagulant can be minimized while the coagulant can be added.

The high-speed coagulation apparatus 200 includes a rotary joint 270 for supplying a coagulant to the upper end of the coagulant conveyance pipe 222, which is connected to the upper end of the rotation shaft 220 and is vertically extended, ). Accordingly, it is possible to replace only the corresponding parts when a fixed occurrence occurs, so that maintenance is easy.

1, the flow rate adjusting tank 110 and the flocculant tank 120 are disposed at the front end of the high speed flocculation apparatus 200 to receive the sewage to be purified and the flocculant necessary for flocculating the sewage, A coagulant pump 121 driven according to a control signal of the controller 500 may be disposed in the supply line so that the amount of coagulant supplied to the high-speed coagulant 200 may be controlled.

The non-dynamic-flux flocculation apparatus 300 includes a second flocculation chamber 310 divided into a plurality of flocculation floats 321 divided into upper and lower floors so as to replace the function of a conventional mechanical slow- The sewage is introduced into the adjacent flocculation tank 321 disposed below the flocculation tank 321 to generate circulating water. As a result, the suspended particulate matter contained in the sewage can be circulated in the water So that they are brought into contact with each other and agglomerated to a predetermined size.

3, a water-tight internal space is formed, and a sewage water inlet 311 connected to the sewage water outlet 213 of the high-speed flocculation apparatus 200 is formed at an upper portion thereof. A second flocculation chamber 310 formed in the second flocculation chamber 310 and a plurality of flocculation tanks 321 arranged in the transverse direction inside the second flocculation chamber 310 to divide the interior space into upper and lower floors, A partition 320 formed with a hole 322 and a turbulence prevention plate 330 horizontally disposed at a lower position of each communication hole 322.

Here, the second flocculation chamber 310 is formed of a tank type which is sealed to prevent odors of the inflowed sewage from leaking out, and is made of a material excellent in corrosion resistance and wear resistance such as a suss.

Although three coagulation tanks 321 are illustrated as being formed in the chamber by two partition walls 320, one or three or more barrier ribs 320 may be arranged to form two or more flocculation tanks 321, . The sewage introduced into the sewage inlet 311 disposed at the upper end of the second flocculation chamber 310 flows into the first flocculation tank 321 partitioned by the first partition 320 and the introduced sewage flows through the communication hole 322 The wastewater flowing into the second flocculation tank 321 is discharged to the third flocculation tank 321 through the communication hole 322 and finally discharged to the bottom of the second flocculation tank 321. [ And is discharged to the outside through the formed sewage discharge port 312.

Since the sewage is designed to have a multi-stage flocculation structure in which the sewage flows in and out from the upper part, the sewage introduced into the upper part of each flocculation tank through the sewage inlet 311 or the communication hole 322 is directed downward The sewage coming into contact with the bottom surface of each flocculation tank 321 while falling is moved along the bottom surface and moves upward while coming into contact with the inner wall surface of the flocculation tank 321, The circulation water is generated on both sides of the center of the coagulation tank 321.

Accordingly, the suspended substances contained in the sewage introduced from the outside can be agglomerated to have a lump shape larger than the size when they circulate and come in contact with each other due to the circulating water generated in the first flocculation tank 321, The suspended solids are increased in size through the second flocculation tank 321 and the third flocculation tank 321.

As shown in the drawing, an inclined portion 331 inclined upward gradually toward the outer side is formed around the end of the turbulence prevention plate 330 so that the inflowed sewage is stagnated on the turbulence prevention plate 330 The time can be increased and the width of the fall can be increased to further increase the flocculation efficiency.

In addition, inclined surfaces 323 inclined upward gradually toward the outer side are formed around the end of the partition 320, or the partition 320 is inclined upward gradually toward the outer side from the central portion It is possible to guide the upper surface of the partition 320 to move toward the communication hole 322 without stagnating the sludge.

In addition, a pressure control pipe 340 for discharging the air in the internal space to the outside is disposed in the upper portion of the second flocculation chamber 310, and the control unit 500 controls the internal pressure of the second flocculation chamber 310 When the set value is exceeded, the pressure control pipe 340 is driven and controlled to maintain the set value.

A sewage discharge pipe 360 is connected between the sewage discharge port 312 and the sewage inlet 412 of the scum skimmer 400. The sewage discharge pipe 360 is connected to the drainage pipe The bent portion bent at a position opposite to the discharge direction is formed so as to be discharged through the sewage discharge port 312 and collide with the inner wall of the sewage discharge pipe 360 to minimize the separation of the coagulated state of the suspended substances contained in the sewage have.

The scum skimmer 400 restricts the outflow of the bubble temporarily in a stepwise manner through the partition structure provided in multiple stages with respect to the flow direction of the lower part, thereby removing the floating suspended particles in a state where the saturated bubble state is maintained, As well as the suspended solids contained in the treated water can be minimized.

The scum skimmer 400 has a watertight inner space formed therein at one side thereof with a wastewater inlet 412 connected to the wastewater outlet 312 of the non-dynamic floc coagulation apparatus 300, A plurality of lower partitions 414 extending from the lower end to the upper part and a plurality of upper partitions 415 extending downward from the upper part are arranged alternately in the lower part and the upper part in the inner space, And a bubble generator 420 for generating minute bubbles of micro or nano-size and supplying the generated micro bubbles to the inner space.

Here, the reaction chamber 410 is a chamber for providing a reaction space for floating and floating suspended substances contained in sewage while being supplied with sewage and fine bubbles therein. The reaction chamber 410 has a predetermined internal space for floating separation, The wastewater discharged from the non-dynamic-flux flocculation apparatus 300 is supplied to the inner space through the sewage inlet 412, and the purified sewage is discharged to the outside through the treated water outlet 413 disposed on the other side.

In the figure, three bubble reaction tanks 416 are formed by a partition structure in which three lower partition walls 414 and three upper partition walls 415 are alternately disposed in the reaction chamber 410 with respect to the flow direction of sewage However, the present invention is not limited to this, and it is needless to say that two bubble reaction tanks or four or more bubble reaction tanks may be formed in consideration of the purification efficiency according to the concentration of the suspended substances contained in the wastewater and the fine bubble supply amount.

As shown in FIG. 4, the sewage inlet 412 is provided with a spray nozzle 419 for spraying the inflow sewage to the inside thereof, and one spray nozzle 419 is shown in the drawing, The injection nozzles 419 are connected to the wastewater inlet 412 and the branch pipe so that the wastewater can be uniformly injected into the bubble reaction tank 416 as a whole .

In addition, in order to efficiently purify wastewater, the inflow pump is controlled by the inverter to precisely control the flow rate, so that the throughput can be efficiently controlled by introducing a fixed quantity of sewage and a coagulant into the flow, and the floatation efficiency can be increased by maximizing coagulation.

In addition, the sewage introduced through the sewage inlet 412 may contain suspended solids that are not floated by micro bubbles. In the case of suspended solids of such a size, It may not be discharged. For this purpose, a discharge port 418 for discharging the settled sludge precipitate is formed in the lower portion of each bubble reaction tank 416. Here, in order to smoothly remove the sludge, it is possible to swiftly discharge the sludge by giving a slope of more than 45 degrees to both sides of the discharge port 418.

The use of the fine bubbles has various advantages. First, the residence time (floatation time) is shorter than that of the conventional precipitation method (settling time), so that it is excellent in response to an increase in the amount of treated water. In case of sedimentation method, coagulant is used for formation of larger suspended particles for sedimentation while floatation method can achieve sufficient floatation efficiency even with small suspended particle size. In addition, the micro bubble-based floating micro bubbles having a diameter of 30 or less are used in place of the air bubbles having the millimeter size of the conventional air floating type, so that the interfacial adsorption phenomenon is excellent, It is possible to remove suspended solids particles less than 2 mm in size without using coagulant. In order to ensure cleaner treated water quality, it is necessary to use a small amount of coagulant, so that the actual amount of coagulant used is less than the sedimentation method and the conventional air floating method.

The second feature is that the micro bubbles stay in the water for about 1 hour when the bubble rising speed in the water is about 1 to 3 mm / min and for a short time of 15 minutes for a long time, There are advantages.

 The third characteristic is that the microbubbles (microbubbles or nano bubbles) have a large bubble surface area, so that the oxygen dissolution rate is excellent, so that the remaining fine bubbles are completely dissolved in the water after the floatation treatment to supersaturated DO (Dissolved Oxygen) Which is characterized by minimizing the impact of the aquatic ecosystem when the water flows into the water system.

The fourth characteristic is that the fine bubbles generate OH ^* due to the crushing effect of bubbles to remove organic substances, remove odors, and sterilize, thereby reducing odor in treated water and floating sludge, and sterilizing E. coli Effect.

The scum skimmer 400 is disposed on the upper part of the reaction chamber 410 and rotatably rotates the rotator 432 having a plurality of skimmers 431 mounted on the outer surface thereof, And a floating sludge discharging unit 430 for scraping the floating sludge floated on the upper end of the reaction tank 416 and discharging the floated sludge to the sludge discharging port 411 disposed on the upper end of the reaction chamber 410. The rotating body 432 is connected in an endless track manner between rotating rolls 433 disposed on both sides of the reaction chamber 410 and is connected to the rotating roll 433 by a control signal of the controller 500 A driving motor (not shown) that rotates along the axis is connected to the shaft so that the skimmer 431 can be circulated by the rotational force of the driving motor.

As shown in the drawing, the upper partition wall 415 is provided at its upper end with a rounded portion 440, which has a hemispherical shape with an upward concave shape and guides the transfer of suspended solids conveyed from the upper side of the bubble reaction tank 416 adjoined by the skimmer 431 So that the floating sludge which moves sideways while being pressed by the skimmer 431 is caught by the sharp top of the upper partition wall 415 and is disassembled can be minimized.

In addition, the upper end of one side wall of the reaction chamber 410 is formed with an upwardly inclined upward protrusion so as to be in contact with the surface of the skimmer 431 turning at one end of the reaction chamber 410, A water removing unit 450 for removing water from the sludge discharge port 411 is disposed to prevent unnecessary water from being discharged to the sludge discharge port 411, thereby discharging the concentrated sludge.

The upper partition wall 415 disposed at the rearmost end of the plurality of upper partition walls 415 is formed at an upper end thereof with a length longer than the height of the skimmer 431 pivoting at the end position of the rotary member 432 And the sludge leakage preventing wad 490 is rounded along the turning curve of the skimmer 431 so that the skimmer 431 rotates at the end of the rotating body 432 and is adsorbed to the skimmer 431, Can be prevented from flowing into the treated water outlet 413 side and discharged together with the sewage water.

5, the reaction chamber 410 is formed with a fine bubble inlet 421 for injecting the fine bubbles supplied to one side into the inner space, and the other side passes through the respective bubble reaction vessels 416, A bubble generator 420 is disposed between the treated water supply port 424 and the fine bubble inlet 421 to discharge a part of the treated water moving toward the water discharge port 413. [ A micro bubble is generated in the treated water that is disposed on the connected process water transfer line 470 and the generated fine bubble is discharged to the fine bubble inlet 421.

The scum skimmer 400 is disposed between the bubble generator 420 and the treatment water supply port 424 on the treated water transfer line 470 to remove foreign matter from the treated water supplied to the bubble generator 420 And includes a plurality of strainer 460, and each strainer 460 is connected to the process water transfer line 470 by a different branch line 471.

A solenoid valve 480 for opening and closing the conduit is disposed in each of the separation lines 471 according to a control signal and the controller 500 controls the bubble generator 420 according to the digital signal value of the pressure gauge 422 provided in the bubble generator 420 The opening and closing states of the solenoid valves 480 can be adjusted.

Accordingly, when any one of the two strainer 460 uses the strainer 460, if the bubble pressure is increased or decreased beyond the reference value, the solenoid valve 480 of the corresponding strainer 460 is automatically shut off The solenoid valve 480 of one strainer 460 is opened so that fine bubbles can be supplied through a new strainer 460 free from foreign matter. For example, if the digital signal value of the pressure gauge 422 is out of the range of 8 to 10 Kg / cm2, the currently used strainer 460 is replaced by the solenoid valve 480 to the other strainer 460.

In addition, an open / close lid 462 is provided on the upper portion of the strainer 460 so that the inside of the strainer 461 can be easily replaced or cleaned.

A large bubble is generated by mixing with the circulating water in the output end of the bubble generator 420, and a high pressure state is maintained by using a pump. A splitter is disposed at the rear end of the bubble generator 420, It is possible to form ultrafine bubbles smaller than fine bubbles and to supply such ultrafine bubbles so that a large number of ultrafine bubbles are adhered in such a manner as to completely surround the floating material so that the floatation and removal efficiency can be further increased Do.

As described above, in the water treatment system according to the preferred embodiment of the present invention, the high-speed flocculation apparatus 200, the non-moving-type flocculation apparatus 300, and the scum skimmer 400 are arranged stepwise along the treatment- The floating material can be agglomerated in a short time to such an extent that it can be floated by the fine bubbles through the scum skimmer 400 through the apparatus 200 and the non-moving-type flocculation apparatus 300, and the floatation efficiency is increased by the fine bubbles, The treated water purified to minimize the amount of the substance can be discharged to the outside.

1, a conveying flow meter 140 is disposed on the sewage supply line to measure and adjust the supply amount of the fine bubbles, and the sedimentation sludge discharged through the discharge port 418 is connected to a sludge storage vessel 150 And stored.

A treatment water tank 610 of the ozone treatment apparatus 600 is connected to the treated water discharge port 413 to discharge purified water and an ozone generator 620 and an ozone tank 630 are provided at the rear end of the treatment water tank 610, And is ultimately discharged to the discharge tank 180 or the UV disinfection facility 190 via the flow meter 160.

Meanwhile, in the water treatment system according to the preferred embodiment of the present invention, the ozone treatment apparatus 600 is provided to remove organic substances, BOD, bacteria, odor and chromaticity contained in sewage water. The ozone treatment apparatus 600 includes a treatment water tank 610, an ozone generator 620, and an ozone reaction tank 630.

The treatment water tank 610 is a storage tank for mixing the ozone water that is ozone dissolved in the ozone reaction tank 630 and the sewage water discharged from the scum skimmer 400 disposed at the front end of the ozone tank 630. A watertight inner space is formed, The sewage discharge port (613) is connected to the sewage discharge port (413) of the scum skimmer (400) to form a sewage water inlet (612) connected to the sewerage water supply pipe and a sewage discharge port (613) for discharging sewage water.

A sewage supply pipe 611 is connected to the sewage inlet 612 to inject the sewage into the inner space. The end of the sewage supply pipe 611 is horizontally disposed in the inner space, So that the sewage can be supplied with a uniform pressure as a whole.

A treatment water inlet 619 for introducing the ozone water discharged from the ozone reaction tank 630 is formed at one side of the treatment water tank 610 and a part of the sewage supplied to the inside is supplied to the ozone generator 620 at the other side. And the sewage discharge port 613 is disposed at a predetermined height on the treatment water tank 610 so that sewage water supplied at a predetermined water level or higher flows over the discharge tank 180 It is possible to increase the stagnation time of the sewage and the ozonated water in the treatment water tank 610 by discharging it to the UV disinfection facility 190 side.

6, the treatment water tank 610 includes a plurality of lower partitions 614a extending from the lower end to an upper part in the inner space and a plurality of upper partitions 614b extending downward from the upper end, A plurality of mixing vessels 615 for mixing the ozone water and the sewage are formed in an alternating manner on the upper part and the upper part of the mixing chamber 615 to maximize the stagnation time in which the ozone reacts with the sewage, And the mixing efficiency of the ozonated water and the sewage can be increased.

Ozone gas (O ₃ gas) deaerated in the ozone reaction tank 630 is connected to an air flow meter of the bubble generator 420 through a pipe to reuse residual ozone, thereby improving the treatment efficiency and treating residual ozone.

The treatment water tank 610 is provided with a bubble generator 616 for supplying bubbles to the inside of the most distal mixing chamber 615 in the sewage flow direction among the plurality of mixing vessels 615, The end mixing chamber 615 functions as an aeration tank for degassing the ozone contained in the treated water by the bubbles supplied from the aeration portion 616 and is provided at the upper portion of the treated water tank 610 to discharge the degassed ozone to the outside A first gas discharge pipe 617 is provided. Since the ozone dissolved in the sewage is deaerated by the aeration unit 616 and the air bubbles injected by the aeration tank, the ozone can be discharged through the first gas discharge pipe 617, so that ozone is contained in the treated water, It can be prevented from acting in advance.

A second gas discharge pipe 637 for discharging ozone to the outside is formed at an upper end of the ozone reaction tank 630 to be described later. The aeration unit 616 is connected to the first gas discharge pipe 617 and the second gas discharge pipe And the gas discharge pipe 637 is connected to one or more gas discharge pipes to supply the ozone gas to the endmost mixing chamber 615 to form a bubble for recycling the previously discharged ozone, The load of the waste facilities can be minimized.

The ozonizer 620 is an apparatus for supplying ozone necessary for the ozone reaction and is connected to a sewage supply port 618 provided on the other side of the treatment water tank 610 to receive sewage in the treatment water tank 610 Generates ozone, dissolves in the supplied sewage, and discharges it to the ozone reaction tank 630 side.

A circulation pump 650 is provided between the sewage supply port 618 and the ozone generator 620 to supply a flow pressure to the sewage circulated and supplied to the circulation pump unit 650, It is preferable that a plurality of circulating pumps are connected to be branched to the same supply line so that when a functional failure occurs in one circulating pump, the other circulating pump is operated to prevent the sewage treatment from being interrupted.

The ozone reaction tank 630 is a water tank for contacting the supplied sewage with ozone to purify the ozone by the ozone reaction. The ozone water tank 630 is connected to the ozone generator 620, An inlet port 631 is formed and horizontally horizontally arranged to divide the inner space into a plurality of contact tanks 633a to 633c which are divided into upper and lower parts and vertically opened communication holes 634 are formed at the center A processing water outlet 635 for supplying ozone-treated water to the processing water tank 610 is formed at an upper portion of the processing tank 610 and connected to one side of the processing water tank 610 by a treated water supply pipe 640 do.

The inner space of the ozone reaction tank 630 is divided into upper and lower parts by the partition part 632 and ozone is supersaturated in the lower part so that a high concentration contact tank 633a for removing organic substances and BOD contained in the sewage And a lower concentration contact tank 633b for removing bacteria, odor, and color contained in the sewage is formed at the upper portion by dissolving less ozone relative to the high concentration contact tank 633a.

The partition wall 632 is provided with a lower partition wall 614a and an upper partition wall 614b that are vertically spaced apart from each other in the inner space and are provided between the high concentration contact reservoir 633a and the low concentration contact reservoir 633b. At least one concentration dividing tank 633c for maintaining the ozone concentration of the contact tanks 633a and 633b is formed.

Here, when the high-concentration contact tank 633a and the low-concentration contact tank 633b are disposed in close contact with each other, the high-concentration ozone water flowing through the communicating hole may rapidly increase the ozone concentration of the low concentration contact tank 633b Concentration of the ozone water located in the upper portion of the high concentration contact tank 633a may be smaller than a predetermined value.

However, since the concentration dividing tank 633c is disposed between the high concentration contact tank 633a and the low concentration contact tank 633b to alleviate the abrupt change in the concentration, the high concentration contact tank 633a and the low concentration contact tank 633b, Can maintain an appropriate ozone concentration, respectively.

The treated water discharge port 635 disposed in the low concentration contact tank 633b is disposed at a predetermined height in the ozone reaction tank 630 and flows through the treated water supply pipe 640 And is discharged to the treated water inlet 619 side of the water tank 610, thereby increasing the time required for the ozone and the sewage to react in the ozone reaction tank 630.

The sewage discharge port 613 is disposed at a predetermined height on the treatment water tank 610 so that the sewage supplied over the set water level flows over the discharge tank 180 and the UV disinfection facility 190 in the downstream.

In the case of the ozone reaction tank 630 in which the ozone reaction is performed by the respective constitutions and functions of the ozone treatment apparatus 600 according to the preferred embodiment of the present invention as described above, The upper portion of the high-concentration contact tank 633a is divided into upper and lower portions, and ozone is supersaturated in the lower portion to form a high-concentration contact tank 633a for removing organic substances and BOD contained in sewage, Concentration contact tank 633b for removing bacteria, odor and color contained in the sewage is formed. Therefore, it is possible to maximize the purification efficiency of the sewage due to the ozone reaction, and at the same time minimize the system construction cost and facility specifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various modifications and changes may be made without departing from the scope of the appended claims.

200 ... High speed flocculation device 210 ... First flocculation chamber
220 ... rotation shaft 230 ... stirring wing
300 ... non-dynamic flux flocculation apparatus 310 ... second flocculation chamber
320 ... barrier rib 330 ... turbulence prevention plate
400 ... Scheme skimmer 410 ... reaction chamber
420 ... bubble generator 500 ... control unit
600 ... ozone treatment apparatus 610 ... treatment tank
620 ... ozone generator 630 ... ozone reaction tank

Claims (12)

A first coagulation chamber 210 in which a watertight inner space 211 is formed and in which a wastewater inlet 212 and a wastewater outlet 213 are respectively provided and a second coagulation chamber 210 rotatably and vertically disposed in the inner space 211, A rotating shaft 220 having a coagulant outlet 221 for discharging the coagulant to the inner space 211 and a stirring wing 230 mounted around the rotating shaft 220 to rotate together to form a vortex, A flocculation apparatus 200;
A second agglomeration chamber 310 having a watertight inner space formed therein and having a sewage inlet 311 connected to the sewage outlet 213 of the high speed coagulation apparatus 200 and a sewage outlet 312 formed at the lower portion thereof, A partition wall 320 is formed in the second coagulation chamber 310 to divide the inner space into a plurality of coagulation tanks 321 divided into upper and lower portions and a communicating hole 322 opened upward and downward, And a turbulence prevention plate (330) horizontally disposed at a lower position of each communication hole (322); And
A watertight inner space is formed and a sewage water inlet 412 connected to the sewage water outlet 312 of the non-motorized flocculation apparatus 300 is formed at one side and a treated water outlet 413 is formed at the other side, A plurality of lower partitions 414 extending in the upper direction and a plurality of upper partitions 415 extending in the lower direction from the upper end are alternately arranged on the lower part and the upper part of the reaction chamber 410 forming the plurality of bubble reaction tanks 416, And a scum skimmer (400) including a bubble generator (420) for generating micro bubbles of micro or nano size and supplying the generated micro bubbles to the internal space.
The method according to claim 1,
The high-speed coagulation apparatus (200)
And further includes a water flow obstruction plate 240 formed in an upright-disposed plate shape and fixedly mounted on one side of the inner wall of the first flocculation chamber 210 and spaced apart from one another along the inner wall of the first flocculation chamber 210 The water treatment system comprising:
3. The method of claim 2,
The sewage inlet 212 of the high-speed flocculation apparatus 200 is connected to the other end of the sewage supply pipe 250 connected to the flow rate control tank 110 at one end,
The high speed flocculation apparatus 200 further comprises a sewage sensor 260 disposed in the sewage supply pipe 250 or the sewage inlet 212 for measuring the concentration of the sewage supplied,
And a control unit (500) for controlling the supply amount of the flocculant supplied to the high-speed flocculation apparatus (200) according to the detection signal of the sewage sensor (260).
The method of claim 3,
The high speed flocculation apparatus 200 includes a rotary joint 270 for supplying flocculant to the upper end of the flocculation conveyance pipe 222 which is connected to the upper end of the rotary shaft 220 and is vertically extended inside the rotary shaft 220 Further comprising a water treatment system.
The method according to claim 1,
The non-dynamic flux flocculation apparatus 300 includes:
Wherein an inclined portion (331) inclined upward gradually toward the outer side is formed around an end of the turbulence prevention plate (330).
6. The method of claim 5,
The non-dynamic flux flocculation apparatus 300 includes:
An inclined surface 323 inclined upward gradually toward the outer side toward the outer side of the partition 320 may be formed or the partition 320 may be inclined upward gradually toward the outer side from the central portion Water treatment system.
The method according to claim 6,
The non-dynamic flux flocculation apparatus (300) further includes a pressure control pipe (340) disposed at an upper portion of the second flocculation chamber (310) and discharging the air in the internal space to the outside according to a control signal,
Further comprising a control unit (500) for controlling the pressure control pipe (340) to drive and control the set value when the internal pressure of the second flocculation chamber (310) exceeds a predetermined value.
The method according to claim 1,
The scum skimmer (400)
A rotating body 432 having a plurality of skimmers 431 mounted thereon is rotated on the outer surface of the reaction chamber 410 so that the floating body 432 is lifted by the fine bubbles on the upper side of each bubble reaction tank 416, Further comprising a floating sludge discharging part (430) for scraping off the sludge and discharging it to the outside.
9. The method of claim 8,
And a round part 440 disposed at the upper end of the upper partition wall 415 and having an upwardly concave hemispherical shape and guiding the transfer of suspended solids conveyed from the upper side of the bubble reaction tank 416 adjoined by the skimmer 431 The water treatment system comprising:
10. The method of claim 9,
The scum skimmer (400)
The upper end of the one side wall of the reaction chamber 410 is upwardly inclined outwardly so as to scrape off moisture adhering to the skimmer 431 in contact with the surface of the skimmer 431 pivoting at one side of the reaction chamber 410, Further comprising a water removal unit (450) for removing the water.
11. The method of claim 10,
The reaction chamber 410 is provided with a fine bubble inlet 421 for injecting fine bubbles into one side of the reaction chamber 410 and a fine bubble inlet 421 passing through the other side of the reaction chamber 410 through the bubble reaction tank 416, A treatment water supply port 424 for discharging a part of the treated water to be treated is formed,
The bubble generator 420 is disposed on the treated water transfer line 470 connected between the treated water supply hole 424 and the fine bubble inlet 421 to generate fine bubbles in the treated water to be supplied, And discharged to the fine bubble inlet 421,
The scum skimmer 400 is disposed between the bubble generator 420 and the process water supply port 424 on the process water transfer line 470 to remove foreign substances from the process water supplied to the bubble generator 420 Includes a strainer 460,
Each strainer 460 is connected to the process water transfer line 470 by a different branch line 471,
In each of the separation lines 471, a solenoid valve 480 for opening and closing the pipeline is disposed according to a control signal,
And a control unit (500) for controlling the opening and closing states of the solenoid valves (480) according to digital signal values of a pressure gauge (422) provided in the bubble generator (420).
9. The method of claim 8,
The upper part of the upper partition wall 415 disposed at the rear end of the plurality of upper partitions 415 is formed to extend upwardly with a length relatively longer than the height of the skimmer 431 pivoting at the end position of the rotating body 432 Characterized in that a sludge leakage preventing wedge (490) which is rounded and bent along the turning curve of the skimmer (431) is mounted.

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