KR102400072B1 - Large air bubble generating device and apparatus for purifying sewage or waste water comprising the same - Google Patents

Abstract

A bubble generator and a wastewater purification device including the same are provided. The bubble generator is installed at the bottom of a septic tank in the wastewater purification device including the septic tank for receiving and treating introduced water containing organic matter, nitrogen and phosphorus. The bubble generator includes: i) a discharge unit having an opening through which air bubbles are discharged; and ii) a flipper unit that is positioned above the discharge unit, discharges air bubbles by operating in a direction away from the bottom when the buoyancy of the air bubbles is greater than a predetermined value, and covers the discharge unit after the air bubbles are discharged.

Description

Bubbling device and wastewater purification device including same {LARGE AIR BUBBLE GENERATING DEVICE AND APPARATUS FOR PURIFYING SEWAGE OR WASTE WATER COMPRISING THE SAME}

The present invention relates to a bubble generator and a wastewater purification device including the same. More specifically, it is possible to simultaneously process nutrient salts such as organic matter, nitrogen and phosphorus in the biological treatment of wastewater by generating large bubbles, and a bubble generator that can be selectively processed on a large or small scale according to the flow rate and for inflow and intermittent discharge It relates to a wastewater purification system.

A general wastewater treatment system mainly consists of an equalization tank and a biological treatment reactor. The equalization tank stores the sewage or wastewater generated on a daily basis. The biological treatment reactor introduces an amount of sewage or wastewater stored in the equalization tank to be treated. Sewage or wastewater is discharged after anaerobic treatment, aerobic treatment, anaerobic treatment and sedimentation. Then, sewage or wastewater is introduced again and the same process is repeated. That is, anaerobic, aerobic, and anaerobic treatment are performed in a single reactor.

However, this method is not easy to operate in a small-scale treatment facility operated unmanned, and thus the treatment efficiency is lowered. Therefore, the anaerobic and anaerobic tanks are installed separately in front of the sequencing batch reactor (SBR) or the sludge layer is secured in a single reactor to increase the efficiency of creating anaerobic and anaerobic conditions.

Korean Patent No. 10-0463631

Korean Patent Registration No. 10-2094020

Korean Patent Registration No. 10-1911504

To provide a large bubble generator useful for the simultaneous removal of nutrients such as organic matter, nitrogen, and phosphorus in the biological treatment of wastewater. In addition, there is provided a wastewater purification device including a bubble generator.

The bubble generator according to an embodiment of the present invention is installed at the bottom of a septic tank in a wastewater purification device including a septic tank that receives and processes influent water containing organic matter, nitrogen and phosphorus. The bubbler is i) a discharging unit having an opening through which air bubbles are discharged, and ii) located above the discharging unit, and when the buoyancy of the air bubble is greater than a preset value, it is operated in a direction away from the floor to discharge the air bubble, and the air bubble is discharged and a flipper part applied to cover the discharge part after being discharged.

The bubble generator according to an embodiment of the present invention may further include a support part facing the opening and having another opening larger than the opening. The flipper part may be positioned on the support part. The flipper part includes: i) a pair of mutually facing side surfaces, ii) a hinge shaft interconnecting the pair of side surfaces in the vicinity of one edge of the flipper, and iii) a hole into which both ends of the hinge shaft are inserted, and perpendicular to the support part It may include a pair of fixed fixing pieces. The flipper part may further include an upper surface connecting the pair of side surfaces, and an acute angle between the upper surface and the support part may be 20° to 40°. The support part may include an edge part positioned to be spaced apart from the flipper part at the maximum. The bubble generating device according to an embodiment of the present invention is installed to be spaced apart from each other in a direction perpendicular to the support part under the periphery of the flipper part on the support part, and the distance from each other gradually increases from the tangent line between the support part and the upper surface to the edge part. It may further include one or more pairs of guide plates. A height of one or more of the pair of guide plates may be lower than an average height of the flipper part.

The bubble generating device according to an embodiment of the present invention may further include a fixing part in contact with the support part. The flipper part includes: i) a pair of first side surfaces facing each other and having a rail groove extending in a direction perpendicular to the support part, and ii) a second side surface that interconnects the pair of first side surfaces and contacts the fixing part may include The fixing part is inserted into the rail groove in a direction crossing the rail groove, and may include a fixing rod positioned above the fixing part. The flipper part is spaced apart from the support part and may be applied to move up and down along the rail groove. A second side surface is inserted into the fixing part to form a concave groove adapted to slide the flipper part up and down, and the concave groove may be in contact with the second side surface. The fixing part further includes an inclined surface formed thereon, the inclined surface is formed at a position higher than the height of the fixing rod, and when the flipper part is maximally raised, the fixing part may be applied so as to be in contact with the inclined surface.

A wastewater purification apparatus according to an embodiment of the present invention includes the above-described bubble generator and a plurality of septic tanks. The plurality of septic tanks include: i) one or more anaerobic tanks that receive and treat influent water, ii) one or more anaerobic tanks connected to an anaerobic tank to receive and treat influent water, iii) one or more anaerobic tanks connected to anoxic tanks to receive influent water and supply air to the treated water for sedimentation After generating the treated water located on the sediment, one or more aeration tanks are discharged, and iv) an anaerobic tank, an anaerobic tank and a plurality of bubble generators installed at the bottom of one or more septic tanks selected from the group consisting of an aeration tank.

The one or more bubblers may include a plurality of bubblers. The plurality of bubble generators may be arranged to be spaced apart from each other at the same distance in one or more directions on the floor, and one or more other discharge units may be positioned between the plurality of bubble generators.

It is possible to increase the removal efficiency of organic matter, nitrogen, phosphorus, etc. by using a bubble generator during inflow and intermittent discharge type wastewater treatment. In addition, only one anaerobic tank, an anaerobic tank, and SBR can be used when purifying a small volume of wastewater. In addition, an anaerobic tank and an anaerobic tank are installed at the site where the load fluctuation is expected to be severe, and two SBRs can be installed for selective operation. Meanwhile, in medium-to-large facilities, two anaerobic tanks, anoxic tanks, and SBRs can be installed each to prepare for breakdowns, and different arrangement methods can be applied depending on site conditions. By installing the bubble generating device according to an embodiment of the present invention in the SBR, it is possible to generate large bubbles. As the water flow is generated by the large bubbles, the residence time of the microbubbles generated in the aeration device in the water tank is increased. As a result, the oxygen transfer rate is increased to reduce the air flow rate. Accordingly, it is possible to reduce the power cost and improve the sewage treatment efficiency by disturbing the lower sludge.

1 is a schematic block diagram of a wastewater purification apparatus according to a first embodiment of the present invention.
2 is a schematic block diagram of a wastewater purification apparatus according to a second embodiment of the present invention.
3 is a schematic block diagram of a wastewater purification apparatus according to a third embodiment of the present invention.
FIG. 4 is a schematic view of the bottom of a septic tank included in the wastewater purification apparatus of FIG. 1 .
5 is a schematic perspective view of a bubble generator according to a first embodiment of the present invention.
6 is a schematic perspective view of a bubble generator according to a second embodiment of the present invention.
7 is an operation state diagram of the bubble generator of FIG. 6 .
8 is a schematic perspective view of a bubble generator according to a third embodiment of the present invention.

The terminology used herein is for the purpose of referring to specific embodiments only, and is not intended to limit the invention. As used herein, the singular forms also include the plural forms unless the phrases clearly indicate the opposite. The meaning of "comprising," as used herein, specifies a particular characteristic, region, integer, step, operation, element and/or component, and other specific characteristic, region, integer, step, operation, element, component, and/or group. It does not exclude the existence or addition of

Although not defined otherwise, all terms including technical terms and scientific terms used herein have the same meaning as those commonly understood by those of ordinary skill in the art to which the present invention belongs. Commonly used terms defined in the dictionary are additionally interpreted as having a meaning consistent with the related technical literature and the presently disclosed content, and unless defined, are not interpreted in an ideal or very formal meaning.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein.

1 schematically shows a block diagram of a wastewater purification apparatus 100 according to a first embodiment of the present invention. The block diagram of the wastewater purification apparatus 100 of FIG. 1 is only for illustrating the present invention, and the present invention is not limited thereto. Accordingly, the wastewater purification apparatus 100 may be modified into other forms. The wastewater purification apparatus 100 operates in an intermittent discharge manner.

As shown in FIG. 1 , the wastewater purification apparatus 100 includes an anaerobic tank 52 , an anoxic tank 60 , an aeration tank 70 , and a treatment tank 80 . The wastewater purification apparatus 100 of FIG. 1 is suitable for use when treating a small volume of wastewater. The influent is sewage or wastewater, and includes organic matter, nitrogen, phosphorus, and the like. The influent is purified while passing through the anaerobic tank 50 , the anoxic tank 60 , and the aeration tank 70 in sequence, and then is discharged to the treatment tank 80 .

As indicated by the dotted arrow on the upper side of FIG. 1 , the influent flows into the anaerobic tank 50 . As the agitator (not shown) installed in the anaerobic tank 50 rotates, the influent water and the sludge returned from the aeration tank 70 are mixed together. The phosphorus in the microbial cells is released by the carbon source contained in the influent. And the nitrogen component contained in the sludge is reduced to nitrogen gas and removed.

Again, inflow water and sludge are transferred from the anaerobic tank 50 to the anaerobic tank 60 along the dotted arrow direction indicated on the upper side of FIG. 1 . In the anoxic tank 60, the nitrogen component is converted into nitrogen gas to further maximize the reduction and removal thereof. The influent and returned sludge, which have been reacted in the anoxic tank (60), are transferred to the aeration tank (70). A valve 90 is installed between the anoxic tank 60 and the aeration tank 70 . Therefore, the anaerobic tank 60 and the aeration tank 70 may be communicated with each other or blocked by the operation of the valve 90 . A solenoid valve may be used as the valve 90 .

In the aeration tank 70, air is supplied to biologically treat the inflow water. That is, oxidation of organic matter contained in influent, nitrification of nitrogen contained in influent, and excessive absorption of phosphorus occur. When the air supply is completed in the aeration tank 70, the treated water and the sludge are solid-liquid separated and settling occurs.

As shown by the dotted arrow on the upper side of FIG. 1, the influent is purified while circulating the anaerobic tank 50, the anoxic tank 60 and the aeration tank 70, and the sediment continues to accumulate while the above precipitation process is repeated. 1 , when the precipitation process is completed, the treated water is intermittently discharged to the treatment tank 80 . For example, a fixed discharge device (not shown) such as a decanter is installed in the aeration tank 70 to intermittently discharge the treated water located on the sediment to the treatment tank 80 . A valve 96 may be installed between the aeration tank 70 and the treatment water tank 80 to control discharge of treated water.

2 schematically shows a block diagram of a wastewater purification apparatus 200 according to a second embodiment of the present invention. Since the structure of the wastewater purification apparatus 200 of FIG. 2 is similar to the structure of the wastewater purification apparatus 100 of FIG. 1 , the same reference numerals are used for the same parts, and a detailed description thereof is omitted.

As shown in FIG. 2 , the wastewater purification apparatus 100 includes an anaerobic tank 50 , an anoxic tank 60 , aeration tanks 70 and 72 , and a treatment tank 80 . One anaerobic tank 50, an anaerobic tank 60, and a treatment tank 80 are installed in the center, and aeration tanks 70 and 72 are installed on both sides thereof, respectively. Accordingly, both of the aeration tanks 70 and 72 may be used or only one of them may be used alternately. That is, when a failure occurs in any one of the aeration tanks 70 and 72 or a stop is required due to maintenance, one of the aeration tanks 70 and 72 may be stopped and the other aeration tanks 72 and 70 may be used.

Valves 90 and 92 are installed between the anoxic tank 60 and the aeration tanks 70 and 72, respectively. Accordingly, the anoxic tank 60 and the aeration tanks 70 and 72 may be communicated with each other or blocked by the operation of the valves 90 and 92 . As the valves 90 and 92, a solenoid valve may be used.

2 , when the precipitation process is completed, the treated water is intermittently discharged to the treatment tank 80 . Valves 96 and 98 are respectively installed between the aeration tanks 70 and 72 and the treatment water tank 80 to control the discharge of treated water. That is, when the aeration tank 70 is used, the valve 96 is opened to discharge the treated water to the treatment water tank 80 , and when the aeration tank 72 is used, the valve 98 is opened and the treated water is discharged into the treatment water tank 80 . discharged with

3 schematically shows a block diagram of a wastewater purification apparatus 300 according to a third embodiment of the present invention. Since the structure of the wastewater purification apparatus 300 of FIG. 3 is similar to that of the wastewater purification apparatus 200 of FIG. 2 , the same reference numerals are used for the same parts, and detailed descriptions thereof are omitted.

As shown in FIG. 3 , the wastewater purification apparatus 100 includes anaerobic tanks 50 and 52 , anoxic tanks 60 and 62 , aeration tanks 70 and 72 , and treatment tanks 80 and 82 . That is, all the septic tanks included in the wastewater purification apparatus 100 are installed as a pair.

Anaerobic tank 50, anoxic tank 60, aeration tank 70, and treatment tank 80 are located on the left side of wastewater purification apparatus 100, anaerobic tank 52, anaerobic tank 62, aeration tank 72, and treatment The water tank 82 is located on the right side of the wastewater purification apparatus 100 . The left and right anaerobic tanks 50 and 52, anoxic tanks 60 and 62, aeration tanks 70 and 72, and treatment tanks 80 and 82 may all be used, or only one side may be used.

Valves 90 and 92 are installed between the anoxic tanks 60 and 62 and the aeration tanks 70 and 72 . Accordingly, the anoxic tanks 60 and 62 and the aeration tanks 70 and 72 may be mutually communicated or blocked by the operation of the valves 90 and 92 . Meanwhile, the valve 94 is installed between the anoxic tanks 60 and 62 . The valve 94 is opened when only one of the aeration tanks 70 and 72 is used. In this case, the other aeration tank can be stopped for maintenance. As the valves 90, 92, 94, a solenoid valve may be used. Valves 96 and 98 may be installed between the aeration tanks 70 and 72 and the treatment tanks 80 and 82 to control the discharge of treated water.

On the other hand, although not shown in FIGS. 1 to 3, it can also be used in a wastewater purification apparatus that fills a septic tank with sewage, circulates it internally, undergoes advanced treatment, and then discharges it. That is, by returning the septic tank supernatant, in which the reaction occurs before and after aeration, to the lower part of the septic tank for a certain period of time, the chance of contact between the sludge consolidated in the lower part of the septic tank and the supernatant is increased to reach an anaerobic condition more quickly. Therefore, a high denitrification effect can be obtained, so it is effective in the composition of phosphorus emission conditions. Furthermore, by installing the above-described bubble generator 10 at the bottom of the septic tank, it is possible to further increase the efficiency of wastewater purification.

Hereinafter, with reference to FIGS. 4 to 8, a bubble generator 10 that can be installed in a septic tank such as anaerobic tanks 50 and 52, anoxic tanks 60 and 62, or aeration tanks 70 and 72 (shown in FIG. 4) will be described in more detail.

4 schematically shows the bottom 40 of the septic tank of the wastewater purification apparatus 100 of FIG. 1 . The structure of the bottom 40 of FIG. 4 is only for illustrating the present invention, and the present invention is not limited thereto. Therefore, the floor 40 can be transformed into other shapes. Also, the bottom 40 may be the bottom of a septic tank such as an anaerobic tank, anoxic tank, aeration tank or reaction tank. This type of septic tank is merely to illustrate the location where the bubble generator 10 is installed, and the present invention is not limited thereto. Therefore, the bubble generator 10 may be installed at the bottom of various tanks for purifying wastewater.

As shown in FIG. 4 , the bubble generator 10 and the discharge unit 101 are arranged on the floor 40 . The discharge unit 101 and the bubble generator 10 are arranged side by side along the x-axis and y-axis directions of FIG. 4 . The bubble generator 10 is arranged to be spaced apart from each other at equal intervals in the x-axis direction. In addition, the bubble generator 10 is arranged to be spaced apart from each other at the same distance in the y-axis direction. Unlike FIG. 4 , the bubble generator 10 may be arranged to be spaced apart from each other at the same distance in both the x-axis direction and the y-axis direction. That is, although FIG. 4 shows that the bubble generator 10 is arranged to be spaced apart at the same distance in only one direction of the x-axis or the y-axis, they may be spaced apart at the same distance in all directions of the x-axis or the y-axis. And a plurality of discharge units 101 are located between the bubble generating device (10). Alternatively, only one discharge unit 101 may be positioned between the bubble generator 10 .

As shown in FIG. 4 , small air bubbles SB are discharged through the discharge unit 101 , and large air bubbles LB are discharged through the bubble generator 10 . Therefore, by arranging the bubble generator 10 regularly, the large air bubbles LB are uniformly mixed with the small air bubbles SB. As shown by a dotted arrow in FIG. 4 , when the large air bubbles LB are discharged, the small air bubbles SB follow the large air bubbles LB. As a result, it is possible to improve the purification efficiency of the wastewater by increasing the time the small air bubbles SB stay in the wastewater. The height of the discharge unit 101 may be substantially about 200 mm. Although not shown in FIG. 4 , separate lines may be installed in the bubble generator 10 and the discharge unit 101 to separately supply air.

The bubble generator 10 and the discharge unit 101 are installed at the bottom 40 of the anaerobic tank, anoxic tank or aeration tank to discharge air to remove organic matter, nitrogen and phosphorus contained in the influent water. The small volume air bubbles SB discharged from the discharge unit 10 and the large volume air bubbles LB discharged from the bubble generator 10 are used together. In this case, the wastewater of the anaerobic tank and the anaerobic tank can be well stirred. That is, since the bubble generating device 10 discharges large air bubbles and the small air bubbles move while following them, the circulation rate of the inflow water can be further increased. In addition, the sludge accumulated on the floor 40 can be removed by forcibly circulating the water to the bottom by pushing the large air bubbles to the bottom.

On the other hand, maintenance costs can be reduced in the aeration tank. For example, when the bubble generator 10 is installed in the aeration tank, the aeration time can be reduced from 3 hours to 2.5 hours. As a result, it is possible to maximize the purification efficiency of wastewater as a whole.

5 schematically shows a bubble generator 10 according to a first embodiment of the present invention. 5 is an enlarged view of the bubble generator 10 of FIG. 4 . The structure of the bubble generator 10 of FIG. 5 is only for illustrating the present invention, and the present invention is not limited thereto. Accordingly, the structure of the bubble generator 10 may be modified into other forms.

As shown in FIG. 5 , air is supplied to the flipper unit 103 through the discharge unit 102 . Although it is illustrated in FIG. 5 that air is supplied in the +z-axis direction, air may also be supplied in the y-axis direction or the x-axis direction. The flipper part 103 is a cover-shaped part, a hinge is formed on one side thereof, and is opened while turning over as an axis. That is, the flipper unit 103 is operated in a direction away from the floor 40 . Accordingly, air bubbles discharged from the discharge unit 101 gather inside the flipper unit 103 to form large air bubbles. When the volume of these air bubbles gradually increases and the buoyancy becomes greater than or equal to a preset value, the flipper unit 103 rotates and turns over to discharge large air bubbles. After the air bubbles are discharged, the flipper unit 103 covers the discharge unit 101 again. Here, the buoyancy force of the air bubble may be 12N to 13N. The mass of the flipper unit 103 is determined according to the range of the buoyancy force of the air bubble. The weight of the flipper unit 103 may be 10 kg to 20 kg. When the weight of the flipper part 103 is too small, it is difficult to return the flipper part 103 to its original position after being turned over. In addition, when the weight of the flipper part 103 is too large, the flipper part 103 is not turned over. Accordingly, the weight of the flipper unit 103 is adjusted within the above-described range.

As shown in FIG. 5 , the support part 105 is positioned parallel to the xy plane direction and is formed in a plate shape. The support 105 is fixed by a beam 107 above the floor 40 . Although not shown in FIG. 5 , the beams 107 are positioned not only on the front side but also on the rear side of the support part 105 along the x-axis direction. That is, since the flipper unit 103 rotates along the arrow direction, that is, the x-axis direction, it receives a large force in the x-axis direction. Therefore, it is preferable that the pair of beams 107 are positioned side by side along the x-axis direction.

The support 105 has another opening 1051 (shown in dashed line). Another opening 1051 faces the opening 1011 and is larger than the opening 1011 . Accordingly, air bubbles discharged through the opening 1011 pass through the opening 1051 and are trapped under the flipper unit 103 . Although the support part 105 is illustrated in FIG. 5 as being present, the support part 105 may be omitted.

The flipper unit 103 includes an upper surface 1031 , a pair of first side surfaces 1033 , a second side surface 1035 , a hinge shaft 1037 , and a pair of fixing pieces 1039 . In addition, the flipper unit 103 may further include other components as necessary. A lower portion of the flipper unit 103 communicates with the opening 1011 of the discharge unit 101 . Accordingly, air bubbles discharged from the opening 1011 are once trapped in the flipper unit 103 .

The upper surface 1031 interconnects the pair of first side surfaces 1033 . The upper surface 1031 forms an acute angle α with the support 105 . The acute angle α may be 20° to 40°. If the acute angle α is too small, the flipper part 103 may open too well. Also, when the acute angle α is too large, the flipper unit 103 may not open well. Therefore, the acute angle α is adjusted within the above-described range. Air bubble holes 1031a are formed on the upper surface 1031 to discharge the air collected in the flipper part 103 . Although this discharge process is not necessary in the aeration process, the water pressure fluctuates in the sedimentation process and the discharge process. In this case, the residual air is discharged through the air bubble hole 1031a in order to prevent the flipper part 103 from being opened by the residual air remaining in the flipper part 103 and the sludge is floating. The air bubble hole (1031a) is formed in the position farthest from the support part (105) of the upper surface (1031). The diameter of the air bubble hole (1031a) may be 1mm to 10mm. When the diameter of the air bubble hole 1031a is too large, air may not be collected in the flipper part 103 . In addition, when the diameter of the air bubble hole 1031a is too small, the air bubble hole 1031a may be blocked by sludge. Therefore, the diameter of the air bubble hole (1031a) is adjusted to the above-mentioned range.

The pair of first side surfaces 1033 face each other along the y-axis direction. The pair of first side surfaces 1033 have a right-angled triangle shape. Accordingly, the upper surface 1031 is formed in an inclined shape. The second side surface 1035 faces the -x-axis direction. The second side surface 1035 is interconnected with the pair of first side surfaces 1033 and is in contact with the upper surface 1031 .

The hinge shaft 1037 interconnects the pair of side surfaces 1033 . The hinge shaft 1037 is located near one edge of the flipper 103 . Here, the corner may be a line where the second side surface 1035 and the support part 105 meet.

A pair of fixing pieces 1039 are vertically fixed on the support 105 . That is, the pair of fixing pieces 1039 protrude in the +z-axis direction. A hole 1039a is formed in the pair of fixing pieces 1039 . Both ends of the hinge shaft 1037 are inserted and fixed in the hole 1039a. Accordingly, the flipper 103 rotates in the direction of the arrow while being turned over by the hinge shaft 1037 .

6 schematically shows a bubble generator 20 according to a second embodiment of the present invention. The enlarged circle of FIG. 6 shows the partial planar structure of the bubble generator 20 as viewed from the z-axis direction. The structure of the bubble generator 20 of FIG. 6 is only for illustrating the present invention, and the present invention is not limited thereto. Accordingly, the structure of the bubble generator 20 may be modified into other forms. Meanwhile, since the structure of the bubble generator 20 of FIG. 6 is similar to that of the bubble generator 10 of FIG. 5 , the same reference numerals are used for the same parts, and a detailed description thereof will be omitted.

6 , the flipper unit 203 includes a first upper surface 2031 , a second upper surface 2032 , a pair of first side surfaces 2033 , and a second side surface 2035 . The first upper surface 2031 is inclined, and the second upper surface 2032 is formed in a direction parallel to the xy plane and connected to the first upper surface 2031 . A pair of rail grooves 2033a extending long in the z-axis direction, that is, in a direction perpendicular to the support part 105 are formed on the pair of first side surfaces 2033 . The second side 2035 interconnects the pair of first sides 2033 .

The fixing part 207 is positioned in contact with the support part 105 . Since the flipper part 203 is supported by the fixing part 207 and moves up and down along the z-axis direction, the fixing part 207 needs to be firmly fixed to the support part 105 by welding or the like. The fixing part 207 is in contact with the second side surface 2037 . When the flipper part 203 moves up and down, the second side surface 2037 rides on the fixing part 207 and moves along the z-axis direction.

The fixing portion 207 includes a fixing rod 2071 , a support rod 2073 , and an inclined surface 2075 . The support rod 2073 is located above the fixing part 207 and extends along the x-axis direction. The fixed rod 2071 extends long along the y-axis direction, which is a direction crossing the support rod 2073 . The fixing rod 2071 is inserted into the rail groove 2035a in a direction crossing the rail groove 2035a. The fixing rod 2071 may extend long in the y-axis direction and be connected to the other upper side of the fixing part 207 or may be formed in a broken shape.

As shown in the enlarged circle of FIG. 6 , the second side surface 2035 is positioned adjacent to the concave groove 207a. That is, the second side surface 2035 is formed to be inserted into the fixing part 207 . A concave groove 207a is formed in the fixing part 207 . Accordingly, the flipper part 203 is fixedly inserted into the concave groove 207a. Accordingly, the flipper part 203 moves while sliding up and down along the concave groove 207a. On the other hand, an inclined surface 2075 is formed on the upper surface of the fixing part 207 to support the flipper part 203 when it is turned. Hereinafter, the inclined surface 2075 will be described in more detail with reference to FIG. 7 .

7 shows the operation state of the bubble generator 20 of FIG. 6 in order. 7 (a) shows a state in which the flipper part 203 is stopped, and FIG. 7 (b) shows a state in which the flipper part 203 rises while a large air bubble LB rises by buoyancy, 7C illustrates a state in which the flipper part 203 is turned over while riding on the inclined surface 2075 . The operation state of the bubble generator 20 of FIG. 7 is only for illustrating the present invention, and the present invention is not limited thereto. Accordingly, the operating state of the bubble generator 20 may be modified in other forms.

First, FIG. 7A shows a state in which the flipper unit 203 is fixed to the fixing unit 207 . The fixing rod 2071 is inserted and fixed in the rail groove 2035a. Accordingly, the flipper unit 203 may ride the rail groove 2035a and rise along the +z-axis direction.

Next, in FIG. 7B , the number of air bubbles inside the flipper part 203 gradually increases. As the number of air bubbles increases, the air bubbles rise in the direction of the arrow to float the flipper unit 203 . Accordingly, the flipper part 203 rises along the rail groove 2035a. A concave groove 207a (shown in FIG. 6 ) is formed in the fixing portion 207 . Accordingly, the flipper part 203 inserted and fixed in the concave groove 207a is guided along the concave groove 207a to rise stably.

Finally, as shown in FIG. 7C , when the flipper part 203 reaches the upper end of the fixing part 207 and rises to the maximum, the inclined surface 2075 (the enlarged source of FIG. 7C ) shown in) and rotate in the direction of the arrow. To this end, the inclined surface 2075 is formed at a position higher than the height of the fixing rod 2071 . Therefore, after the flipper unit 203 rises to the maximum, it is turned over while rotating, and the air bubbles are discharged to the outside in the direction of the arrow. In this case, since the buoyancy force caused by air bubbles no longer acts on the flipper part 203 , the flipper part 203 descends again and returns to the state shown in FIG. 7A . Through this process, the flipper unit 203 operates.

8 schematically shows a bubble generator 30 according to a third embodiment of the present invention. The structure of the bubble generator 30 of FIG. 8 is only for illustrating the present invention, and the present invention is not limited thereto. Accordingly, the bubble generator 30 may be modified into other shapes. Meanwhile, since the bubble generator 30 of FIG. 8 is similar to the bubble generator 10 of FIG. 5 and the bubble generator 20 of FIG. 6 , the same reference numerals are used for the same parts, and detailed descriptions thereof are omitted. do.

As shown in FIG. 8 , the support portion 305 includes an edge portion 3051 . The edge portion 3051 is positioned to be maximally spaced apart from the flipper portion 103 . That is, the edge portion 3051 is located below the front surface of the support portion 305 in the x-axis direction. Meanwhile, a plurality of guide plates 3053a and 3053b are positioned on the support 305 . The height h of the guide plates 3053a and 3053b is lower than the average height of the flipper part 103 . The guide plates 3053a and 3053b guide air bubbles discharged when the flipper unit 103 is opened in the direction of the arrow. As a result, air bubbles can be dispersed and disturbed over a larger surface.

The guide plates 3053a and 3053b are positioned to be spaced apart from each other. The distance d between the guide plates 3053a and 3053b may be 40 mm to 60 mm. Preferably, the spacing d may be substantially 50 mm. When the distance d is too small or too large, the air bubbles discharged from the flipper part 103 are not well guided by the guide plates 3053a and 3053b. Therefore, it is preferable to adjust the interval (d) in the above-mentioned range.

The guide plates 3053a and 3053b are located below the circumference of the flipper part 103 . The guide plates 3053a and 3053b are formed in pairs or more symmetrically and extend in an oblique direction. The upper surface 3031 includes a tangent line 3031a in contact with the support 305 . The guide plates 3053a and 3053b gradually increase in distance from each other toward the edge portion 3051 from the tangent line 3031a.

Meanwhile, the flipper unit 103 includes a fixing rod 3031 . The fixed rod 3031 extends along the y-axis direction. The three fixing pieces 3059 are spaced apart at equal intervals and fixed on the support 305 . A rail groove 3059a is formed in the fixing piece 3059 along the z-axis direction. Accordingly, the flipper part 103 moves up and down in the z-axis direction by the fixing rod 3031 inserted into the rail groove 3059a. As a result, large air bubbles are discharged from the flipper unit 103 and are guided and ascended. Accordingly, it is possible to reduce power cost and the like by air bubbles guided in various directions.

Although the present invention has been described as described above, it will be readily understood by those skilled in the art to which the present invention pertains that various modifications and variations are possible without departing from the spirit and scope of the appended claims.

10, 20, 30. Bubble generator
40. Floor
50, 52. Anaerobic
60, 62. Anaerobic
70, 72. Aeration tank
80, 82. Treatment tank
100, 200, 300. Sewage and wastewater treatment equipment
101, 102. Discharge part
103, 203, 303. Flipper part
105. Support
107. A pair of beams
207. Fixed part
207a. concave groove
1031, 2031, 2033, 3031. Top
1033. A pair of first aspects
1035, 2035. Second Aspect
1037. Hinge shaft
1039, 3059. Batten
2035a, 3059a. rail home
2071, 3031. Fixed rod
2073. Support Rod
2075. Slope
3031a. tangent
3051. Edge part
3053a, 3053b. guide plate
LB. big air bubble
SB. small air bubbles

Claims (10)

At least one bubble generating device installed at the bottom of the septic tank in a wastewater purification device including a septic tank for receiving and treating influent water and sludge containing organic matter, nitrogen and phosphorus,
a discharge portion having an opening through which air bubbles are discharged, and
It is located on the discharge unit, and when the buoyancy of the air bubble is greater than or equal to a preset value, it is operated in a direction away from the floor to discharge the air bubble, and after the air bubble is discharged, a flipper part applied to cover the discharge unit,
a support portion facing the opening and having another opening larger than the opening and surrounding the opening; and
A pair of beams installed on the floor, respectively positioned at the lower front side and lower rear side of the support part to support the support part by being spaced apart from the floor
including,
The flipper part is located on the support part,
The flipper part,
a pair of sides facing each other,
a hinge shaft interconnecting the pair of side surfaces in the vicinity of one edge of the flipper;
A pair of fixing pieces having holes into which both ends of the hinge shaft are inserted, and vertically fixed on the support part, and
an upper surface interconnecting the pair of side surfaces
includes,
Air bubble holes for preventing the sludge from floating by discharging residual air in the flipper part are formed in the upper surface,
The diameter of the air bubble hole is 1mm to 10mm,
The pair of beams are positioned to be spaced apart from each other in a direction parallel to the pair of side surfaces. delete delete In claim 1,
An acute angle between the upper surface and the support part is 20 to 40 degrees. In claim 4,
The support portion includes an edge portion positioned to be spaced apart from the flipper portion at the maximum,
A pair of mutually symmetrical guide plates are installed on the support part and spaced apart from each other in a direction perpendicular to the support part under the circumference of the flipper part, and the distance from each other increases gradually from the tangent line between the support part and the upper surface to the edge part. including more,
A height of at least one guide plate among the pair of or more guide plates is lower than an average height of the flipper part. In claim 1,
Further comprising a fixing portion in contact with the support portion,
The flipper part,
A pair of first side surfaces facing each other and having rail grooves extending in a direction perpendicular to the support part, and
a second side connecting the pair of first side surfaces and contacting the fixing part
includes,
The fixing part is inserted into the rail groove in a direction crossing the rail groove, and includes a fixing rod located above the fixing part,
The flipper part is spaced apart from the support part and is applied to move up and down along the rail groove. In claim 6,
A concave groove is formed in the fixing part so that the second side surface is inserted and the flipper part slides up and down, and the concave groove is in contact with the second side surface. In claim 6,
The fixing unit further includes an inclined surface formed thereon, the inclined surface is formed at a position higher than the height of the fixing rod, and when the flipper part is maximally raised, the fixing part is applied to come into contact with the inclined surface. at least one bubbler according to any one of claims 1 and 4 to 8, and
multiple septic tanks
As a wastewater purification device comprising a,
The plurality of septic tanks,
One or more anaerobic tanks for receiving and treating the influent,
One or more anaerobic tanks connected to the anaerobic tank to receive and process the influent;
One or more aeration tanks connected to the anaerobic tank to receive the inflow water, supply air to the treated water to generate sediment, and then discharge the treated water located above the sediment;
A plurality of bubble generators installed on the bottom of the aeration tank
A wastewater purification device comprising a. 10. The method of claim 9,
wherein the at least one bubbler comprises a plurality of bubbler;
The plurality of bubble generators are arranged to be spaced apart from each other at equal intervals in one or more directions on the bottom of the aeration tank, and at least one other discharge unit is positioned between the plurality of bubble generators.

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