KR102341415B1 - Biological water treatment system having surface aerator - Google Patents

Abstract

The present invention provides a biological water treatment system including: a reaction tank (10) in which water is treated; a walkway (20) for providing a movement path on the reaction tank; a surface aerator for supplying oxygen to water (refer to 100, 200, 300); a lifting module (400) for adjusting the height of an aeration unit with respect to a water surface by moving the aeration unit (200) of the surface aerator up and down with respect to the walkway; and buffer units (500, 550) for alleviating an impact generated when the aeration unit is rotated.

Description

Biological water treatment system including surface aeration device {BIOLOGICAL WATER TREATMENT SYSTEM HAVING SURFACE AERATOR}

An embodiment of the present invention relates to a system for supplying raw water with oxygen by a surface aeration method for biological treatment of raw water.

In general, a biological water treatment system using microorganisms includes a reactor in which raw water (sewage, etc.) is treated, and is configured to supply oxygen to raw water in the reactor by an aeration device for microbial activation, etc.

The aeration device is roughly divided into an aeration type in which oxygen in the air is supplied in an underwater aeration method and a mechanical type in which a surface aeration method is supplied.

The diffuser type underwater aeration device includes an air diffuser installed on the bottom of the reactor to blow air out of the water, and a blower and an air transport pipe for supplying air to the air diffuser. However, this underwater aeration device not only prevents the blowout hole of the air diffuser from being closed due to water treatment microorganisms and suspended substances (including sediment) in raw water, but also has a large discharge pressure due to the water pressure depending on the depth of the reactor. Oxygen can be supplied to the entire reaction tank only by applying a blower, but it is difficult to visually observe whether it is operating normally, and the management layer is inevitably complicated due to the necessity of an air transport pipe. And it is possible to work only after discharging raw water, etc. Overall, there is a problem that high cost is required for maintenance and is accompanied by a lot of inconvenience.

On the other hand, the mechanical surface aeration device is configured to spray water on the surface of the raw water into the air using an impeller rotated by a motor. Such a surface aeration device is advantageous compared to an underwater aeration device in terms of maintenance as it does not require an air diffuser, a blower, and an air transport pipe, but improved water treatment efficiency There is a problem that is difficult to expect.

Domestic Utility Model Registration No. 20-0202172, Patent Publication No. 10-0941949, Registered Patent Publication No. 10-1012273, and Registered Patent Publication No. 10-1750449 have the problem of localized stirring of general surface aeration devices. A swirling vortex type surface aeration device is proposed to solve this problem.

The swirling vortex type surface aeration device includes an aeration unit rotated by a motor. The aeration unit is configured to introduce water from the lower part and discharge the introduced water from the upper part in a tangential direction to the air at the time of rotation, thereby generating an upward vortex turning in the water and generating a water current that advances around the water surface to force water circulate Such a swirling vortex type surface aeration device may be applied as a fixed type that is mounted on a structure and has a fixed position, or may be applied as a floating type, which is a type supported by a floating body that provides buoyancy.

Here, the fixed type may be more preferred than the floating type due to its economical and stable operation in terms of maintenance, but it is difficult to actively and flexibly cope with water level fluctuations, so if the water level changes significantly The operation cannot be performed accurately, and breakdowns or damage are inevitable due to vibrations generated during operation, and suspended substances in the water flow into the aeration unit along the rising vortex to increase the turbidity of the water surface or to prevent the operation of the aeration unit from malfunctioning. The downside is that it can cause Therefore, there is an urgent need to prepare an improvement plan for this.

Republic of Korea Registered Utility Model Publication No. 20-0202172 (November 15, 2000) Republic of Korea Patent Publication No. 10-0941949 (2010.02.04.) Republic of Korea Patent Publication No. 10-1012273 (2011.02.07.) Republic of Korea Patent Publication No. 10-1750449 (2017.07.03.)

An embodiment of the present invention is to provide a biological water treatment system capable of adjusting the operating height of the surface aeration device according to the change in the water level of the reactor and the process conditions. An embodiment of the present invention is to provide a biological water treatment system capable of minimizing various loads and noises caused by vibrations generated during operation of a surface aeration device. An embodiment of the present invention is to provide a biological water treatment system capable of preventing the malfunction of the surface aeration device due to suspended substances in water.

The problem to be solved is not limited thereto, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, a reaction tank for water treatment with an open upper portion; at least one or more mounting structures disposed on the reactor; and an aeration unit provided on the mounting structure and rotated about an axis in an up-down direction, and a rotation driving unit for adjusting a rotation speed of the aeration unit according to water treatment conditions, wherein water (raw water) in the reaction tank is included. at least one mechanical surface aeration device for supplying oxygen through the surface aeration action of the aeration unit; A biological water treatment system may be provided, including a first buffer unit that prevents an impact generated when the aeration unit is rotated from being transmitted to the mounting structure and the rotation driving unit.

The surface aeration device may be configured to introduce water in the reaction tank from a lower portion and discharge it from an upper portion to the surroundings for a surface aeration action when the aeration unit rotates, and the rotation driving unit is disposed above the mounting structure. can Specifically, the surface aeration device includes: a rotation shaft that provides the shaft in the vertical direction and penetrates the mounting structure in the vertical direction; the aeration unit mounted on a lower region of the rotation shaft and rotated together with the rotation shaft; It may include the rotation driving unit connected to the upper region of the rotation shaft.

The rotation shaft may penetrate through the mounting structure to be movable in the vertical direction. A biological water treatment system according to an embodiment of the present invention includes a lifting module for adjusting the height of the aeration unit with respect to the water surface according to the water treatment condition by moving the aeration unit in a vertical direction with respect to the mounting structure. may include more. The elevating module may include an elevating driving unit configured to vertically move the rotating driving unit between the mounting structure and the rotating driving unit. The first buffer unit may be interposed between the rotation drive unit and the lift drive unit. The first buffer unit may include at least one elastic providing member.

The surface aeration device may further include a blocking plate at a position spaced downward from the aeration unit to restrict the inflow of suspended substances in water into a lower portion of the aeration unit when the aeration unit is rotated. . The surface aeration device may further include an extension shaft extending downward from the lower end of the rotation shaft and passing through the aeration unit, the lower end of which is disposed at a position spaced downward from the aeration unit. The blocking plate may be mounted on a lower end of the extension shaft to rotate in the same direction together with the extension shaft when the rotation shaft is rotated. In contrast, the upper end of the extension shaft is rotatably coupled to the lower end of the rotation shaft in an axial direction, and the blocking plate is configured to have a weight that functions as a weight, so that the extension shaft is rotated when the rotation shaft rotates It may not necessarily rotate together with the rotation shaft.

The blocking plate may have at least one through hole. The opening ratio of the through hole may be controlled by a hole opening and closing mechanism.

According to an embodiment of the present invention, a reaction tank for water treatment with an open upper portion; at least one or more mounting structures disposed on the reactor; and an aeration unit provided on the mounting structure and rotated about an axis in a vertical direction, and a rotation driving unit for adjusting a rotation speed of the aeration unit according to water treatment conditions, wherein the aeration unit is supplied to water (raw water) in the reaction tank. at least one mechanical surface aeration device for supplying oxygen through the surface aeration action of and a lifting module for adjusting the height of the aeration unit with respect to the water surface according to the water treatment condition by moving the aeration unit up and down with respect to the mounting structure.

A biological water treatment system according to an embodiment of the present invention includes a first detector for detecting a treatment state of water in the reaction tank as the water treatment condition, and a second detector for detecting a water level in the reaction tank; The control unit may further include a control unit controlling the operation of the rotation driving unit and the operation of the lifting module based on the value detected by the first detector and the value detected by the second detector.

According to an embodiment of the present invention, a reaction tank for water treatment with an open upper portion; at least one or more mounting structures disposed on the reactor; at least one mechanical surface aeration device provided in the mounting structure and supplying oxygen by a surface aeration action to water (raw water) in the reaction tank, wherein the surface aeration device is rotated about an axis, and the surface when rotating an aeration unit for introducing water in the reaction tank from the bottom for aeration action and discharging it from the top to the surroundings; a rotation drive unit for adjusting the rotation speed of the aeration unit according to water treatment conditions; A biological water treatment system may be provided, comprising a blocking plate at a position spaced downward from the aeration unit to restrict the inflow of suspended substances in water into a lower portion of the aeration unit when the aeration unit is rotated.

According to an embodiment of the present invention, a reaction tank for water treatment with an open upper portion; at least one or more mounting structures disposed on the reactor; and an aeration unit provided on the mounting structure and rotated about an axis in a vertical direction, and a rotation driving unit for adjusting a rotation speed of the aeration unit according to water treatment conditions, wherein the aeration unit is supplied to water (raw water) in the reaction tank. at least one mechanical surface aeration device for supplying oxygen through the surface aeration action of A biological water treatment system may be provided, including a second buffer unit that prevents an impact generated when the aeration unit is rotated from being transmitted to the reaction tank through the mounting structure. The second buffer unit may be provided between the reactor and the mounting structure.

Means of solving the problem will be more specific and clear through the examples, drawings, etc. described below. In addition, various solutions other than the solutions mentioned below may be additionally suggested.

According to an embodiment of the present invention, the aeration unit of the surface aeration device can be disposed at an appropriate operating height by moving the surface aeration device in the vertical direction with respect to the mounting structure according to the fluctuation of the water level in the reaction tank. In addition, since the shock such as vibration generated during operation of the surface aeration device is alleviated by the buffer unit, it is possible to minimize the shock load received by the rotation driving unit, the mounting structure, the reaction tank, and the like.

In addition, according to the embodiment of the present invention, since the mounting structure is configured to function as a walkway, the operator can conveniently perform maintenance work. And, since the buffer unit is disposed between the reaction tank and the walkway, it is possible to greatly improve the walking stability of the operator.

According to an embodiment of the present invention, an aerobic process, anoxic process, or anaerobic process can be performed according to the water treatment conditions. During the aerobic process, the aeration unit is disposed on the water surface side and the surface aeration action is performed in a state in which it is rotated at a relatively high speed. In an anaerobic process or anaerobic process, the aeration unit may be disposed in water and the stirring action may be performed in a state rotated at a relatively low speed. Alternatively, an aerobic process and an anaerobic process or anaerobic process may be alternately performed in one reactor. For example, after the aerobic process is performed in a state in which the aeration unit is disposed on the water surface and rotated at a relatively high speed, the aeration unit is then moved into water and the anaerobic process or anaerobic process may be performed in a decelerated state. As such, embodiments of the present invention may be used to perform various processes.

According to the embodiment of the present invention, since the blocking plate is disposed below the aeration unit, suspended matter (especially, sediment) below the blocking plate flows into the aeration unit along the rising vortex generated in the water by the aeration unit. It is possible to limit the discharge to the water surface, thereby suppressing the increase in turbidity of the water surface. In addition, it is possible to minimize a problem in which a relatively large suspended matter is caught in the operating element of the aeration unit and a failure occurs.

On the other hand, an embodiment of the present invention may be used to improve a biological water treatment system operated in an underwater aeration method (acid air type) to be operated in a surface aeration method.

Effects of the present invention are not limited thereto, and other effects not mentioned will be clearly understood by those skilled in the art from this specification and the accompanying drawings.

1 is a perspective view schematically showing the configuration of a biological water treatment system according to a first embodiment of the present invention.
2 is a side cross-sectional view schematically illustrating the configuration of a biological water treatment system according to a first embodiment of the present invention (cross-sectional view taken along line AA of FIG. 1).
Figure 3 is a perspective view showing the surface aeration device and the first buffer unit shown in Figure 2;
4 is a side cross-sectional view schematically illustrating the configuration of a biological water treatment system according to a second embodiment of the present invention.
5 and 6 are views showing the surface aeration apparatus corresponding to part B of FIG. 4 . FIG. 5 is a perspective view showing the configuration of the surface aeration device, and FIG. 6 is a partial cross-sectional view showing the configuration and operation of the surface aeration device. to be.
7 is a cross-sectional view illustrating the aeration unit shown in FIGS. 5 and 6 .
Figure 8 is an enlarged view showing the portion C of Figure 4 shows the second buffer unit.
9 is a perspective view to a partial cross-sectional view illustrating a surface aeration device, which is a main part of a biological water treatment system according to a third embodiment of the present invention.
Fig. 10 shows the blocking plate shown in Fig. 9; (a) is a plan view, (b) is a cross-sectional view taken along line DD.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. For reference, in the drawings referenced to describe the embodiment of the present invention, the size of the component, the thickness of the line, etc. may be expressed somewhat exaggeratedly for the convenience of understanding. In addition, terms used to describe embodiments of the present invention are mainly defined in consideration of functions in the present invention, and thus may vary according to intentions, customs, etc. of users and operators. Therefore, it would be appropriate to interpret the terms based on the content throughout the present specification.

A biological water treatment system according to an embodiment of the present invention includes a reactor in which raw water (hereinafter, also referred to as water) such as sewage, wastewater, and sewage is treated. The biological water treatment system according to an embodiment of the present invention may be configured to treat raw water by performing a continuous process (A2O series) or a batch process. In the biological water treatment system according to this embodiment of the present invention, the reaction tank may be composed of a plurality of tanks such as an anaerobic tank, anoxic tank, and aerobic tank to perform a continuous process, and anaerobic and anoxic in one reaction tank for a batch process A plurality of processing conditions such as , exhalation, etc. may all be performed. In this case, the batch process may be a sequential batch reactor (SBR) process.

The configuration of a biological water treatment system according to embodiments of the present invention is shown in FIGS. 1 to 10 . 1 to 3 show a first embodiment of the present invention, FIGS. 4 to 8 show a second embodiment of the present invention, and FIGS. 10 and 11 show a third embodiment of the present invention.

Comparing the first embodiment and the second embodiment of the present invention, other configurations and actions are all the same, the first embodiment of the present invention is the elevator module of the second embodiment (see reference numeral 400 in FIG. 4) ), while having a configuration excluded, the second embodiment of the present invention is different in that the first buffer unit of the first embodiment (refer to reference numeral 500 in FIG. 2) has a configuration excluded. And, in the third embodiment of the present invention, when compared with the first or second embodiment, the surface aeration device uses a blocking plate (refer to reference numeral 250 in FIG. 10) for all other configurations and functions are the same. It is different in that it further includes.

First, look at the biological water treatment system according to the first embodiment of the present invention.

1 and 2, reference numeral 10 denotes a reaction tank. For example, if the biological water treatment system according to the first embodiment of the present invention is configured to perform a continuous process, reference numeral 10 may correspond to an aerobic tank among a plurality of tanks constituting the reaction tank.

The reactor 10 is configured to have a structure in which the upper part is fully or partially open. To this end, the reaction tank 10 may be provided in various shapes, but may be formed in a rectangular box shape such as a square or a rectangle, for example. This reactor 10 includes a floor 12 and a wall 14 , with a wall 14 erected on the floor 12 along the edge of the floor 12 , on the perimeter and below the floor 12 . ) and a processing space 10A blocked by a wall 14 is provided. That is, it has an internal space limited by the floor 12 and the wall 14 , and the internal space limited in this way is used as the processing space 10A.

The biological water treatment system according to the first embodiment of the present invention is configured to allow raw water to be treated to be introduced into the reactor 10 and to discharge the treated water from the reactor 10 . Inflow of raw water and discharge of treated water can be made intermittently by control. The inlet flow rate and the outlet flow rate may be changed according to processing conditions and the like.

1 and 2, reference numeral 20 denotes a mounting structure, and a plurality of mounting structures 20 are provided. The mounting structure 20 may be provided in a single number. The mounting structures 20 are respectively installed on the reactor 10 . Each of the mounting structures 20 includes a plurality of end structures 22 each supported by walls 14 of the reactor 10 , and a connecting structure 24 disposed on the reactor 10 . Each of the mounting structures 20 includes a step in which the end structures 22 are connected to each other by a connecting structure 24 , and a movement path is provided on an upper portion of the end structures 22 and an upper portion of the connecting structure 24 . is provided and functions as a walkway. According to the walkway, an operator can enter onto the reactor 10 from the outside of the reactor 10 and can pass on the reactor 10 . Although not shown, each of the mounting structures 20 may further include a handrail structure provided along the length of the step on at least any one or more of both sides of the step.

1 and 2, the biological water treatment system according to the first embodiment of the present invention is a surface aeration device together with a reactor 10 and mounting structures 20 (refer to reference numerals 100, 200 and 300). include those

The surface aeration devices (refer to reference numerals 100, 200, and 300) supply oxygen to the raw water in the reaction tank 10 through a surface aeration action for microbial activation and the like. The surface aeration devices are of a fixed type operating in a state of being mounted on the mounting structures 20, and the number of the surface aeration devices may be increased or decreased depending on the capacity of the reactor 10, the oxygen supply range due to the surface aeration action, and the like (single number may be provided) There is.) The application location and the distance between each other can be determined. For reference, in FIGS. 1 and 2 , the mounting structures 20 are straight and the three mounting structures 20 are shown to be spaced apart from each other in any one horizontal direction, but the spacing of the mounting structures 20, the arrangement structure , shape, etc. are not necessarily limited thereto, and may be appropriately changed depending on the number and application location of the surface aeration device. At this time, each of the mounting structures 20 may be designed in a curved shape, an L shape, a T shape, an X shape, etc. in consideration of the shape of the reactor 10 and the operator's passability.

1 and 2 , each of the surface aeration devices (refer to reference numerals 100, 200 and 300) penetrates the connection structure 24 of the selected mounting structure 20 in the vertical (vertical) direction to penetrate the lower region. Aeration unit ( 200 ), and a rotation driving unit 300 connected to the upper region of the rotation shaft 100 . The connection structure 24 has a through opening through which the rotation shaft 100 passes in the vertical direction. The aeration unit 200 performs a surface aeration action during rotation. Since the surface aeration apparatus of the first and second embodiments of the present invention are configured identically to each other, the surface aeration apparatus will be described in more detail when looking at the second embodiment of the present invention.

As shown in FIGS. 2 and 3, the biological water treatment system according to the first embodiment of the present invention provides an agent for alleviating various impacts generated during the operation of surface aeration devices (refer to reference numerals 100, 200 and 300). 1 It further includes a buffer unit (500). Vibration or the like may occur while the aeration unit 200 is rotated, and the generated vibration may be transmitted to the rotation driving unit 300 and the mounting structure 20 through the rotation shaft 100 to act as an impact load. The first buffer unit 500 is disposed between the mounting structure 20 and each rotation driving unit 300, thereby damping the impact caused by the operation of the surface aeration device, the mounting structure 20, the rotation driving unit 300 And related parts (eg, bolts, anchors, etc.) can be prevented from shortening the lifespan due to fatigue accumulation, and the possibility of accidents due to breakage can be minimized. Of course, according to this, the traffic stability of an operator can be ensured.

Each of the first buffer units 500 includes at least one or more elastic providing members 530 . Specifically, each of the first buffer units 500, further comprising a lower member 510 and an upper member 520 opposed to each other at intervals in the vertical direction, between the lower member 510 and the upper member 520 It has a configuration in which the elastic providing member 530 is interposed. The lower member 510 may be mounted on the connection structure 24 . The upper member 520 may have the rotation driving unit 300 mounted thereon to support the rotation driving unit 300 . The elastic providing member 530 may be a wire rope wound in a coil shape. The elastic providing member 530 may be provided in a lying state between the lower member 510 and the upper member 520 , and the lower region and the upper region may be supported by the lower member 510 and the upper member 520 , respectively.

As shown in FIG. 2, the biological water treatment system according to the first embodiment of the present invention is a second buffer unit for alleviating various shocks generated during operation of surface aeration devices (refer to reference numerals 100, 200 and 300). (550) are further included. The second buffer units 550 are disposed between the top of the wall 14 of the reactor 10 and each end structure 22 of the mounting structures 20 , so that vibrations generated when the aeration unit 200 rotates are mounted. It is transmitted to the wall 14 of the reactor 10 through the structure 20 to prevent it from acting as an impact load. According to these second buffer units 550, various impacts acting on the wall 14 and related parts (eg, bolts, anchors, etc.) of the reaction tank 10 are reduced, thereby shortening the lifespan due to fatigue accumulation. can be prevented and the possibility of accidents due to damage can be minimized. The first embodiment and the second embodiment of the present invention, since the second buffer unit 550 is configured the same as each other, the second buffer unit 550 will be described in more detail when looking at the second embodiment of the present invention decide to do

Next, a biological water treatment system according to a second embodiment of the present invention will be described with reference to FIGS. 4 to 8 .

The biological water treatment system according to the second embodiment of the present invention, as in the first embodiment, includes a reaction tank 10, mounting structures 20, surface aeration devices (refer to reference numerals 100, 200 and 300), and a second buffer unit. (550). And, as described above, while the first buffer unit of the first embodiment (refer to reference numeral 500 in FIG. 2) is excluded, it has a configuration that further includes a lifting module (refer to reference numeral 400).

Since the reactor 10 is configured in the same manner as in the first embodiment of the present invention, raw water to be treated may be introduced and treated treated water may be discharged. Accordingly, the water level of the reaction tank 10 may be changed according to the inflow flow rate and the discharge flow rate, and a water level difference may occur between the inflow side and the discharge side while raw water is introduced or treated water is discharged. The mounting structures 20 are configured the same as in the first embodiment of the present invention.

5 to 7, each of the surface aeration devices (refer to reference numerals 100, 200, and 300) includes a rotation shaft 100, an aeration unit 200, and a rotation driving unit 300, and is the first embodiment of the present invention. It is configured in the same manner as in the first embodiment.

When the aeration unit 200 is rotated while the lower region is submerged in water, it is configured to introduce water from the lower part and discharge the introduced water from the upper part in a tangential direction to the air, thereby generating a rising vortex turning in the water and turning the water surface. As it rotates on the pole, it creates a water current that moves to the surroundings, thereby forcibly circulating the water. In the aeration unit 200 that performs surface aeration and agitation by this action, the amount of oxygen supplied to raw water is determined according to the rotation speed by the rotation driving unit 300 . Of course, when the aeration unit 200 is operated at a relatively high speed, the amount of oxygen supplied to the raw water is increased, and when the aeration unit 200 is operated at a relatively low speed, the amount of oxygen supplied to the raw water is decreased.

The aeration unit 200 may include a rotating body 210 and a plurality of blades 220 . As shown in FIG. 7 , the rotating body 210 may have a cylindrical structure in which the upper and lower ends are opened, respectively, and the upper part is opened. The blades 220 are provided on the inner periphery of the rotating body 210 and rotated in the same direction together with the rotating body 210, are spaced apart from each other along the circumferential direction of the rotating body 210, and are respectively arranged in the rotating body When rotating between the inner periphery of the 210 , water may be introduced from the lower end of the rotating body 210 to form a flow path discharged from the upper end of the rotating body 210 in a tangential direction. The rotating body 210 and the blades 220 constitute the main body of the aeration unit 200 . The aeration unit 200 may further include a shaft mount 230 mounted on the main body (refer to reference numerals 210 and 220 ). The shaft mount 230 may provide a center boss to which the lower region of the rotation shaft 100 is coupled.

As shown in FIG. 5 , the rotation driving unit 300 includes a motor 310 as a power source for providing rotational force to the rotation shaft 100 . The rotation driving unit 300 may further include a reducer 320 that reduces the rotation speed of the motor 310 and transmits it to the rotation shaft 100 .

The surface aeration devices (refer to reference numerals 100, 200 and 300) as described above are surface aeration devices of the swirling vortex type. Some or all of the surface aeration devices may be substituted with a general surface aeration device depending on operating conditions and the like.

Referring to FIG. 6 , the surface aeration devices (refer to reference numerals 100 , 200 and 300 ) respectively connect the rotating shaft 100 through the passage openings provided in the vertical direction in the connection structures 24 of the mounting structures 20 through the connecting structures 24 . ), and the elevating modules 400 elevate these surface aeration devices with respect to the connection structure 24, respectively.

The elevating module 400 is a fixing member 410 mounted on the upper portion of the connection structure 24 and having a shaft through hole communicating with the passage opening provided in the vertical direction, located above the fixing member 410 and the fixing member 410 . ) of the shaft through-hole opposite to the shaft through-hole is provided in the vertical direction, the movable member 420 supporting the rotation driving unit 300, the movable member 420 is moved in the vertical direction with respect to the fixed member 410 It includes a lift driving unit 430 , and a guide 440 for guiding movement of the movable member 420 in the vertical direction by the lift driving unit 430 .

The rotation driving unit 300 is mounted on the movable member 420 . The lifting driving unit 430 may include a plurality of pneumatic or hydraulic cylinders. Each of the cylinders includes a cylinder housing and a piston rod, wherein the cylinder housing is mounted on the movable member 420 and the piston rod can be connected to the top of the fixed member 410 . have. The guide 440 may include guide rods whose lower ends are mounted on the upper portion of the fixed member 410 by passing through guide holes provided in the vertical direction in the movable member 420 .

When the cylinders are contracted, the movable member 420 is lowered to approach the fixed member 410, and the rotation driving unit 300 is lowered together with the rotation shaft 100 and the aeration unit 200 ((( in FIG. 6) b) The height of the surface aeration device (refer to reference numerals 100, 200 and 300) is relatively low. On the other hand, when the cylinders are extended, the movable member 420 is raised and spaced apart from the fixed member 410 , and the rotation driving unit 300 is raised together with the rotation shaft 100 and the aeration unit 200 ( FIG. 6 ). (a) of (a)) The height of the surface aeration device is relatively high. Accordingly, according to the elevating modules 400 , the surface aeration devices can be moved up and down according to water level fluctuations to arrange the aeration unit 200 at an appropriate operating height.

The elevating driving unit 430 is not limited to the configuration described above, and an application structure, an actuating mechanism, etc. can move the movable member 420 in the vertical direction with respect to the connecting structure 24 . It can be variously modified within. For example, the cylinders of the elevating driving unit 430 may be disposed between the fixed member 410 and the movable member 420 , unlike those shown in FIGS. 5 and 6 . In addition, referring to FIG. 6 , although it is shown that a space in which the elevating driving unit 430 is accommodated in the connecting structure 24 is concavely provided, the elevating drive is performed in a state in which the connecting structure 24 is provided flat without a concave accommodation space. The unit 430 may also be applied. In addition, the lifting drive unit 430 may be configured to include a lift (lift) instead of cylinders, or may be configured to include a motor and a ball screw (ball screw). In this case, the lift may include a link mechanism and be configured to operate electrically. Depending on the implementation conditions, etc., a lift configured to be operated manually rather than electrically may be applied.

4 and 8, the second buffer unit 550 is configured the same as the first embodiment of the present invention. Each of these second buffer units 550 includes at least one or more elastic providing members 580 . In addition, each of the second buffer units 550 further includes a lower member 560 and an upper member 570 facing each other at intervals in the vertical direction, and between the lower member 560 and the upper member 570 . The elastic providing members 580 are interposed.

As shown in FIG. 8 , the lower member 560 is provided above the wall 14 of the reactor 10 , and the upper member 570 is provided at the lower portion of the end structure 22 . A plurality of elastic providing members 580 may be provided. In addition, the elastic providing members 580 are elastic rings made of an elastic material (rubber, metal, etc.), and the outer peripheral lower region and upper region of the elastic ring are the lower member 560 and the upper member 570, respectively. It can be applied in supported form. As the elastic providing member 580, the elastic rings may be arranged in various shapes. As the elastic providing member 580, a coil spring may be applied in a lying state instead of elastic rings. The elastic providing members 580 are elastic tubes made of an elastic material, and the outer peripheral lower region and the upper region of the elastic tube may be applied in a form supported by the lower member 560 and the upper member 570 , respectively. The arrangement structure of the elastic tubes as the elastic providing member 580 may be variously changed. The elastic providing members 580 are wire rope wound in a coil shape, and are provided in a state lying between the lower member 510 and the upper member 520 , and the lower region and the upper region are the lower member 560 and the upper member. Each may be supported on 570 . For reference, the first cushioning unit 500 of the first embodiment of the present invention may be applied to an elastic ring or an elastic tube rather than a wire rope wound in a coil shape as the elastic providing member 530 .

Next, a biological water treatment system according to a third embodiment of the present invention will be described with reference to FIGS. 9 and 10 . As described above, the third embodiment of the present invention is different from the first or second embodiment in that the surface aeration device (refer to reference numerals 100, 200, and 300) further includes a blocking plate 250 . . This is explained as follows. In Figure 9, (a) illustrates a form that includes the first buffer unit 500 and does not include the elevation module 400, (b) is the elevation module without including the first buffer unit 500 (400) illustrates a form including, (c) illustrates a form including the first buffer unit 500 and the elevating module 400 together.

The surface aeration device (refer to reference numerals 100, 200 and 300) of the biological water treatment system according to the third embodiment of the present invention includes an extension shaft 240 extending downward from the lower end of the rotation shaft 100, and an extension shaft 240 ) further includes a blocking plate 250 mounted on the lower part. Although not shown, a hole opening/closing mechanism for opening and closing the through hole 252 of the blocking plate 250 may be further included. The through hole 252 of the blocking plate 250 may be omitted.

The extension shaft 240 passes through the rotating body 210 of the aeration unit 200 in an up-down direction and has a length with a lower end disposed at a position spaced downward from the aeration unit 200 . The extension shaft 240 may be integral with the rotation shaft 100 . Alternatively, an upper end of the extension shaft 240 may be coupled to a lower end of the rotating shaft 100 . At this time, the extension shaft 240 is rotatably coupled to the lower end of the rotation shaft 100 about the axial direction of the rotation shaft 100 so that the extension shaft 240 is not necessarily rotated together with the rotation shaft 100 when the rotation shaft 100 is rotated. may be The extension shaft 240 may be configured to be adjustable in length in a telescopic manner, or may be configured to be adjustable in length by assembling a plurality of unit shafts in a line.

The blocking plate 250 is disposed in the horizontal direction to prevent the upward vortex generated by the aeration unit 200 from floating substances (including sedimentable suspended substances) in the water in the area between the aeration unit 200 and the aeration unit 200 . Accordingly, the inflow into the rotating body 210 of the aeration unit 200 is restricted.

At least one through hole 252 of the blocking plate 250 is provided. Water under the blocking plate 250 may be introduced into the rotating body 210 through the through-hole 252 opened when the aeration unit 200 is rotated. According to the number and size of the applied through-holes 252 , the opening ratio of the blocking plate 250 is determined. According to the determined opening ratio of the blocking plate 250 , water under the blocking plate 250 flows into the rotating body 210 to circulate the stored water, and suspended matter (precipitated suspended matter) below the blocking plate 250 . ) may be introduced into the rotating body 210 to limit the extent to which it is discharged to the water surface.

9 and 10 , the through hole 252 of the blocking plate 250 is formed at a constant angle (eg, counterclockwise) in the same direction as the rotation direction of the aeration unit 200 (eg, counterclockwise). , 30 degrees) may be formed to penetrate the blocking plate 250 in an inclined state. When the aeration unit 200 is rotated so that the rotation shaft 100 is rotated together with the extension shaft 240 and the blocking plate 250 in the same direction, the inclined through hole 252 is the water passing through the through hole 252 . It is possible to minimize the degree to which the suspended matter contained in the aeration unit 200 is mixed into the rising vortex generated by the unit 200 . Water passing through the through hole 252 tries to go out in the direction of rotation of the blocking plate 250 , but collides with water existing in the upper region of the blocking plate 250 , and resistance due to water in the upper region of the blocking plate 250 . As a result, the blocking plate 250 does not smoothly upward toward the rotational direction, and a portion is downward (it may try to flow back into the through hole 252). It is possible to reduce the amount of suspended matter contained in the water passing through the through hole 252 being mixed into the rising vortex generated by the aeration unit 200 while circulating the stored water by flowing into the evaporator.

On the other hand, in the biological water treatment system according to the first to third embodiments of the present invention, each of the surface aeration devices (refer to reference numerals 100, 200, and 300) and the elevating module 400 are each independently controlled by the control unit. can According to the control unit, the rotation driving unit 300 of the surface aeration device is interlocked with the first detector that detects the raw water state of the reactor 10, such as dissolved oxygen (DO), mixed liquor suspended solid (MLSS), and nitrogen concentration as water treatment conditions. ), the aeration unit 200 may be rotated or stopped, and the rotation speed of the aeration unit 200 may be adjusted. In addition, only in the case of including the elevation module 400, by controlling the elevation driving unit 430 of the elevation module 400 in conjunction with the second detector that detects the water level in the reaction tank 10 as a water treatment condition, surface aeration The height of the device can be adjusted automatically. For example, the first embodiment of the present invention may include only the first detector, and the second and third embodiments of the present invention may include both the first detector and the second detector. For reference, the control unit may include a control panel electrically connected to the motor 310 of the rotation driving unit 300 . Of course, only when the lifting module 400 is included, the control panel may also be electrically connected to the lifting module 400 .

Looking at the control by the control unit, first, the first detector may include a dissolved oxygen meter (DO meter) for detecting the amount of oxygen contained in the raw water of the reaction tank (10). In addition, the control unit may control the operation of the rotation driving unit 300 based on the value detected by the dissolved oxygen meter. Specifically, the control unit controls the operation of the rotation driving unit 300 so that the rotation speed of the aeration unit 200 is reduced when the detection value from the dissolved oxygen meter exceeds a predetermined set value, thereby controlling the operation of the reaction tank 10 . It is possible to prevent oxygen from being supplied to raw water more than necessary (oversupply). Conversely, when the detection value from the dissolved oxygen meter is less than the set value, the control unit controls the operation of the rotation drive unit 300 so that the rotation speed of the aeration unit 200 is accelerated to thereby control the oxygen supplied to the reactor 10 to the raw water. can increase the amount of The biological water treatment system according to an embodiment of the present invention can maintain the concentration of dissolved oxygen in the reaction tank 10 at a required level by actively controlling it in this way.

Next, the second detector may include a water level gauge for detecting the water level in the reactor 10 . And, the control unit, based on the value detected by the water level gauge, when it is determined that the water level has risen, the surface aeration device (refer to reference numerals 100, 200, and 300) is moved upward, and when it is determined that the water level has decreased, the surface aeration device By controlling the operation of the lifting driving unit 430 to move the device downward, the upper portion of the aeration unit 200 (a portion from which water flowing in from the lower portion is discharged) is exposed above the water surface, so that the aeration unit 200 acts as a surface aeration action The aeration unit 200 may be disposed on the water surface side to smoothly perform the . In the reaction tank 10 , a water level difference may occur between the inflow side and the discharge side in the process in which raw water is introduced or treated water is discharged. In addition, when raw water is introduced or when treated water is discharged, the water level fluctuation may be large. However, in the biological water treatment system according to an embodiment of the present invention, the height of the aeration unit 200 may be actively controlled to optimally adjust the height of the aeration unit 200 according to a change in water level.

On the other hand, in the embodiment including the elevating module 400 among the first to third embodiments of the present invention, an aerobic process may be performed to treat the raw water of the reactor 10 depending on the water treatment conditions. have. At this time, the lifting driving unit 430 moves the surface aeration device (refer to reference numerals 100, 200 and 300) in the vertical direction under the control of the control unit to place the aeration unit 200 on the water surface side for the surface aeration action ( That is, the aeration unit 200 is disposed at a height exposed above the water level), and the rotation driving unit 300 rotates the aeration unit 200 at a relatively high speed for smooth surface aeration action under the control of the control unit. can do it

Alternatively, depending on the water treatment conditions, an anaerobic process or an anaerobic process may be performed to treat the raw water of the reactor 10 . At this time, the lifting driving unit 430 moves the surface aeration device (refer to reference numerals 100, 200 and 300) in the vertical direction under the control of the control unit to place the aeration unit 200 in water for agitation action (that is, The upper part of the aeration unit 200 is located below the water surface so that the aeration unit 200 is immersed in raw water), and the rotation driving unit 300 performs an anaerobic process or an anaerobic process according to the control of the control unit. The aeration unit 200 may be rotated at a relatively low speed so as to be performed without obstruction.

Alternatively, depending on the water treatment conditions, an aerobic process and an anaerobic process or anaerobic process may be alternately performed to treat the raw water of the reaction tank 10 . At this time, in order to perform the aerobic process, the lifting driving unit 430 places the aeration unit 200 on the water surface side under the control of the control unit, and the rotation driving unit 300 operates the aeration unit ( 200) can be rotated at a relatively high speed. Then, in order to perform an anaerobic process or anaerobic process, the lifting driving unit 430 lowers the surface aeration device (refer to reference numerals 100, 200 and 300) under the control of the control unit to place the aeration unit 200 in water. And, the rotation driving unit 300 may be rotated at a relatively low speed by decelerating the aeration unit 200 under the control of the control unit. Of course, after performing the aerobic process first, then, without performing the anaerobic process or the anaerobic process, the anaerobic process or the anaerobic process is first performed, and then the aerobic process may be performed.

Although the present invention has been described above, the present invention is not limited by the disclosed embodiments and the accompanying drawings, and various modifications may be made by those skilled in the art without departing from the technical spirit of the present invention. In addition, the technical ideas described in the embodiments of the present invention may be implemented independently, or two or more may be implemented in combination with each other.

For example, in the present invention, the mounting structure 20, the surface aeration device (refer to reference numerals 100, 200, and 300) and the elevating module 400 have been described as being provided in plurality, but the mounting structure 20, the surface aeration device And the elevating module 400 may be provided in a single number depending on the implementation conditions and the like.

10: reactor
12: bottom of the reactor
14: wall of the reactor
20: mounting structure (walkway)
22: end structure
24: connection structure
100: rotation axis
200: abandoned unit
210: rotating body
220: blade
230: shaft mount
240: extension shaft
250: blocking plate
300: rotation drive unit
350: anti-vibration unit
400: elevating module
410: fixing member
420: movable member
430: elevating drive unit
440: guide
500: first buffer unit
550: second buffer unit

Claims (7)

a reactor for water treatment;
at least one or more mounting structures disposed on the reactor;
and an aeration unit provided on the mounting structure, rotating about an axis, and a rotation driving unit for adjusting a rotation speed of the aeration unit according to water treatment conditions, wherein oxygen in the water in the reactor is supplied with oxygen by a surface aeration action of the aeration unit At least one mechanical surface aeration device for supplying;
and a first buffer unit for preventing the shock generated when the aeration unit is rotated from being transmitted to the mounting structure and the rotation driving unit,
The surface aeration device introduces water in the reaction tank from the bottom for a surface aeration action when the aeration unit is rotated, and discharges it from the top to the surroundings, and when the aeration unit rotates at a position spaced downward from the aeration unit, water It further includes a blocking plate for restricting the inflow of suspended matter into the lower portion of the aeration unit,
At least one through hole for determining an opening ratio of the blocking plate is provided in the blocking plate;
biological water treatment system. a reactor for water treatment;
at least one or more mounting structures disposed on the reactor;
and an aeration unit provided on the mounting structure, rotating about an axis, and a rotation driving unit for adjusting a rotation speed of the aeration unit according to water treatment conditions, wherein oxygen in the water in the reactor is supplied with oxygen by a surface aeration action of the aeration unit At least one mechanical surface aeration device for supplying;
and a lifting module for adjusting the height of the aeration unit with respect to the water surface according to the water treatment condition by moving the aeration unit up and down with respect to the mounting structure;
The surface aeration device introduces water in the reaction tank from the bottom for a surface aeration action when the aeration unit is rotated, and discharges it from the top to the surroundings, and when the aeration unit rotates at a position spaced downward from the aeration unit, water It further includes a blocking plate for restricting the inflow of suspended matter into the lower portion of the aeration unit,
At least one through hole for determining an opening ratio of the blocking plate is provided in the blocking plate;
biological water treatment system. a reactor for water treatment; at least one or more mounting structures disposed on the reactor; at least one mechanical surface aeration device provided on the mounting structure and supplying oxygen by a surface aeration action to the water in the reaction tank;
The surface aeration device,
an aeration unit which rotates about an axis and introduces water in the reaction tank from a lower part to the surface during rotation and discharges it from the upper part to the surroundings;
a rotation drive unit for adjusting the rotation speed of the aeration unit according to water treatment conditions;
and a blocking plate at a position spaced downward from the aeration unit to limit the inflow of suspended substances in water into a lower portion of the aeration unit when the aeration unit is rotated, wherein the blocking plate has an opening rate of the blocking plate provided with at least one through hole,
biological water treatment system. The method according to claim 1,
In the biological water treatment system, the rotation drive unit is disposed above the mounting structure, and between the mounting structure and the aeration unit, the aeration unit is moved up and down with respect to the mounting structure to the water surface according to the water treatment conditions. It further comprises a lifting module for adjusting the height of the aeration unit, characterized in that the first buffer unit is interposed between the rotation drive unit and the lifting module,
biological water treatment system. 5. The method according to any one of claims 1 to 4,
In the surface aeration device, when the aeration unit rotates, the blocking plate rotates together in the same direction as the aeration unit, and the through hole passes through the blocking plate in a state that is inclined in the same direction as the rotation direction of the aeration unit. characterized in that it is formed to
biological water treatment system. 5. The method according to claim 4,
The first buffer unit includes an elastic providing member,
The elastic providing member is a wire rope wound in a coil shape, an elastic ring or an elastic tube, characterized in that,
biological water treatment system. 5. The method according to any one of claims 1 to 4,
It characterized in that it further comprises a second buffer unit for preventing the shock generated when the aeration unit is rotated from being transmitted to the reaction tank through the mounting structure,
biological water treatment system.

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