KR20180062263A - Membrane filtration system - Google Patents

Abstract

The present invention relates to a membrane filtration system, comprising: a treatment tank; a membrane support frame disposed in the treatment tank and on which a filtration membrane is mounted; and a vane member disposed at a lower end of the membrane support frame and provided to float sludge accumulated in a lower portion of the treatment tank. According to the present invention, foreign materials attached to the membrane can be effectively removed by reciprocating the membrane while reducing energy consumption and filtration performance can be enhanced by floating the deposited sludge.

Description

MEMBRANE FILTRATION SYSTEM

The present invention relates to a membrane filtration system, and more particularly, to membrane filtration capable of improving the filtration ability by floating the sludge to be deposited as well as effectively removing foreign matter adhering to the separation membrane by reducing the energy use while reciprocating the separation membrane ≪ / RTI >

In general, separation membrane technology is one of the separation techniques using the material selective permeability of polymer materials. Unlike the distillation technology, the membrane separation process has no phase change, so it is possible to save energy and simplify the process, have. The membrane has been developed around a reverse osmosis membrane and has been extensively applied to ultrafiltration, microfiltration, and nanofiltration.

Membrane Bio Reactors (MBR), which is one of the membrane filtration systems, is a process that uses a membrane as a substitute for a settling tank used as a final treatment stage of an existing biological treatment process.

By increasing the concentration of microorganisms in the reactor, it is possible to increase the treatment efficiency of organic substances and nitrogen components and to remove the suspended substances and microorganisms by the separation membrane, thereby improving the efficiency of solid / liquid separation. There are many advantages to solve the problem.

Membrane bioreactors are expected to have a smaller footprint than existing conventional activated sludge processes and show better system efficiency and will continue to increase in response to increased water demand due to population growth and urbanization and stringent water quality regulations .

Unlike a membrane-bound treatment system that is used as an after-treatment process of a conventional secondary biological treatment facility, the submerged membrane bioreactor generally refers to a reaction vessel capable of solid-liquid separation by directly immersing the membrane module in a secondary biological reactor, It is designed to achieve a dual effect of performing the role of solid-liquid separation and raising the water quality to the level of advanced treatment.

On the other hand, in most MBR processes, the membrane module corresponding to the treatment capacity is installed and fixed in a separate frame when the membrane module is immersed in the bioreactor. Accordingly, The process water is discharged through the filtration pipe through the upper collecting process or the both end collecting process.

However, in the filtration process, the suspended solids adhere to the surface of the membrane, thereby blocking the flow of water. As the membrane becomes contaminated, the filtration ability of the membrane bioreactor gradually decreases and the membrane permeation pressure increases. The membrane was difficult to wash.

Conventional membrane-based wastewater treatment technologies have been studied for various application methods early on, mainly in Europe and Japan. Up until the early 90's, however, the problems of high cost such as membrane cost and energy cost, , It has not been developed as a realistic application technology and has been applied to the field of academic research or specific cases.

However, since the early 1990s, the use of separator membranes such as immersed and activated sludge combined type, in which the membrane is immersed in the activated sludge reaction tank and the upward flow caused by air bubbles generated during the aeration process is utilized as an effective means for suppressing the occlusion of the membrane As a result, the membrane plugging problem, which was the biggest obstacle to the field application of membrane technology, has been alleviated considerably.

Conventionally, an air refining method is used to clean the clogging of the membrane. One of the air refining methods is a method of removing sludge adhered to a membrane while spraying air upward to the outer wall of the membrane as described above, Were used.

However, such an air refining method has a problem that energy consumption is considerably large because it must be performed over the entire range of the membrane.

US Patent Number: US 8287733 B1

Disclosure of Invention Technical Problem [10] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a sludge- The present invention relates to a membrane filtration system.

According to an aspect of the present invention, there is provided a membrane filtration system including a treatment tank and a membrane support frame disposed in the treatment tank, the membrane support frame having a filtration membrane mounted thereon and the membrane support frame disposed at a lower end of the membrane support frame, And a vane member provided to float the sludge.

According to an embodiment of the present invention, the vane member may include a vane body disposed at a lower end of the membrane support frame, and a floating body connected to the lower end of the vane body at a predetermined angle so that sludge is lifted between reciprocating movements of the membrane support frame. It may include wings.

According to another embodiment of the present invention, there is provided a sludge lifting device disposed in the treatment tank and the sludge lifting means disposed at the lower end of the membrane support frame so as to float the sludge accumulated in the lower portion of the treatment tank and the membrane supporting frame on which the filtration membrane is mounted, . ≪ / RTI >

According to an embodiment of the present invention, the sludge lifting means includes a first vane body disposed at a lower end of the membrane support frame, a second vane body connected to a lower end of the first vane body, And a lifting unit disposed to be interlocked with the second vane body and lifting the second vane body.

In an embodiment of the present invention, the elevating unit may include a hydraulic cylinder disposed in the first vane body and a lifting rod disposed in the second vane body and connected to a rod of the hydraulic cylinder.

According to an embodiment of the present invention, the sludge lifting means may further include a third vane body connected to a lower end of the second vane body.

In the embodiment of the present invention, the sludge lifting means may further include a floating wing connected to the lower end of the third vane body so that the sludge is floated between the reciprocating motions of the membrane support frame.

Also, in the embodiment of the present invention, the floating blade may be disposed at an angle with the third vane body.

Further, in the embodiment of the present invention, the sludge lifting means may further include an elastic body disposed between the second vane body and the third vane body so as to mitigate an impact applied to the bottom of the treatment tank when the float wing collides with the bottom of the treatment tank have.

Further, in the embodiment of the present invention, the sludge lifting means may further include a cushioning pad disposed at an end of the float wing so as to mitigate an impact applied by the float wing to the bottom of the treatment tank.

According to the present invention, by reciprocating the membrane support frame, the vane member mounted at the lower end of the membrane support frame naturally floats the sludge deposited at the lower end of the treatment tank, and these sludges can be filtered again through the separation membrane.

Further, the length of the flotation blade can be adjusted according to the deposition amount of the sludge, the deposition height, and the like, so that it is possible to more effectively cope with the deposition state of the sludge.

Which ultimately can improve the filtration efficiency and energy efficiency of the membrane filtration system.

1 is a perspective view illustrating an embodiment of a membrane filtration system of the present invention.
2 is a view showing a structure of a reciprocating means in the invention shown in Fig.
3 shows a link rod in the invention shown in Fig.
4 shows a rotor in the invention shown in Fig.
Fig. 5 is a side view showing the first embodiment of the sliding means in the invention shown in Fig. 1
6 is a front sectional view of the invention shown in Fig.
Figures 7a and 7b show a second embodiment of the sliding means in the invention shown in Figure 1;
Figures 8A and 8B show a third embodiment of the sliding means in the invention shown in Figure 1;
9A and 9B show a fourth embodiment of the sliding means in the invention shown in Fig.
10 is a side view of the vane member of the present invention.
11 is an operational state diagram of the invention shown in Fig.
12 is a side view showing the sludge lifting means of the present invention.
13 is a side cross-sectional view of the sludge lifting means in the invention shown in Fig.
Fig. 14 is a rear view of the sludge lifting means in the invention shown in Fig. 12; Fig.
Fig. 15 is an operational state diagram of the invention shown in Fig. 12; Fig.
16A and 16B show an embodiment of the gap measuring unit of the present invention.
17 is a top view showing an embodiment of the gap adjusting means of the present invention.
Fig. 18 is a partial side view of the first gap adjusting portion in the invention shown in Fig. 17; Fig.
19 is a side view showing a second gap adjusting portion in the invention shown in FIG. 17;
FIG. 20 is a side sectional view showing the interlocking of the sludge lifting means and the second gap adjusting portion in the invention shown in FIG. 19; FIG.
FIG. 21 is a rear view showing the interlocking of the sludge lifting means and the second gap adjusting portion in the invention shown in FIG. 20; FIG.
22 is a view showing a structure of a separation membrane module in the invention shown in Fig.
23 shows a first embodiment of a membrane support frame in the invention shown in Fig.
24 shows a second embodiment of a membrane support frame.
Figure 25 illustrates a method for calculating the looseness of the present invention.
26 is an enlarged view of a length adjuster according to the first embodiment;
27 is an enlarged view of a length adjuster according to the second embodiment;
28 is a view showing a first embodiment of the filtered water discharge portion in the invention shown in FIG.
29 is a view showing a second embodiment of the filtered water discharge portion.
30 is a view showing an arrangement structure of a membrane supporting frame according to the first embodiment;
31 is a view showing an arrangement structure of a membrane supporting frame according to a second embodiment;
32 is a view showing the arrangement structure of the membrane supporting frame according to the third embodiment;
33 is a view showing the arrangement structure of the membrane support frame according to the fourth embodiment;

Hereinafter, preferred embodiments of the membrane filtration system of the present invention will be described with reference to FIGS. 1 to 33 attached hereto.

It is to be understood that both the foregoing description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention, and are not intended to limit the scope of the invention. But are merely illustrative of the elements recited in the claims.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification. Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

Referring to FIG. 1, the membrane filtration system 100 of the present invention basically includes a treatment tank 300, a membrane support frame 600, a separation membrane module 700, a reciprocating means 200, a sludge lifting unit 400, a slide means 500, and a filtered water discharge portion.

Further, according to a further embodiment, it is possible to further include a configuration such as a length adjusting unit 740, a gap measuring unit 810, a gap adjusting unit 860, and a controller 1000.

The present invention can be applied to various kinds of apparatuses constituting the membrane filtration system, but the present invention is limited to membrane bioreactors, among them.

The treatment tank 300 may be provided in the form of a tank and may include an inlet 310 through which wastewater (or sewage) flows and an outlet 320 through which treated wastewater (or sewage) is discharged.

At this time, it is preferable that the inflow port 310 is formed so that inflow water can flow to the upper side of the treatment tank 300, so that a flow that flows upward from the inlet of the treatment tank 300 is generated, It is possible to prevent stagnation at the lower side of the treatment tank 300 and more effective filtration can be performed. The inlet 310 may be formed on the upper surface of the processing tank 300 or may be formed as a pipe bent from the lower side to the upper side when the lower side is easier to design.

The membrane support frame 600 is disposed inside the treatment tank 300 and is a portion where a membrane type membrane module 700 is mounted. As described later, the membrane supporting frame 600 is connected to the reciprocating means 200, and the membrane supporting frame 600 reciprocates integrally with the separating membrane module 700 by the reciprocating means 200 .

The reciprocating means 200 may be connected to the membrane support frame 600 and may be provided to reciprocate the membrane support frame 600. The reciprocating unit 200 may include a reciprocating frame 250 and a driving unit 205.

The reciprocating frame 250 may be connected to the membrane supporting frame 600 and may support the membrane supporting frame 600. The driving unit 205 may be disposed in the treatment tank 300 and may be connected to one side of the reciprocating frame 250 to move the reciprocating frame 250. The driving unit 205 may include a motor 210, a first pulley 211, a second pulley 213, a rotor 230, and a link rod 220.

First, the motor 210 may be disposed on one side of the upper end of the treatment tank 300. The first pulley 211 may be coupled to the shaft of the motor 210 and the second pulley 213 may be connected to the first pulley 211 by a power transmission belt 212, have.

Here, the rotor 230 is connected to the rotating shaft of the second pulley 213 and rotates. The link rod 220 is connected between the rotor 230 and the reciprocating frame 250, Lt; / RTI >

In the embodiment of the present invention, the rotor 230 may be formed with a plurality of connectors 233 connected to the link rod 220. The plurality of connection ports 233 may be disposed at different distances from the center of the rotor 230.

Referring to FIG. 4, five connectors 233 are machined at different intervals (radii) at the center of the rotor 230. However, the present invention is not limited thereto and may be arranged at various numbers and intervals according to the size of the rotor 230. When the user desires to adjust the reciprocating distance of the reciprocating frame 250, the linking rod 220 may be connected at different portions.

For example, if the user wants to reduce the reciprocating distance of the reciprocating frame 250, the link rod 220 may be connected to the connector 233a having a relatively narrow gap at the center of the rotor 230. In this case, since the radius of rotation of the connector 233a due to the rotation of the rotor 230 is small, the reciprocating distance of the link rod 220 is also shortened, which reduces the reciprocating distance of the reciprocating frame 250 .

Conversely, if the user wishes to increase the reciprocating distance of the reciprocating frame 250, the link rod 220 may be connected to the connector 233b having a relatively large gap at the center of the rotor 230. In this case, since the radius of rotation of the coupling hole 233b due to the rotation of the rotor 230 is large, the reciprocating distance of the link rod 220 is also long, which increases the reciprocating distance of the reciprocating frame 250 .

The link rod 220 may include a link body 221, a first link hole 223, and a second link hole 225. The link body 221 may be provided in the shape of a long bar and the first link hole 223 may be provided on one side of the link body 221, And the second link hole 225 may be a portion disposed on the other side of the link body 221 and coupled to the reciprocating frame 250.

At this time, in the embodiment of the present invention, the first link holes 223 may be machined into a plurality of equal intervals along the longitudinal direction of the link body 221. Referring to FIG. 3, four first link holes 223 are formed along the longitudinal direction of the link body 221. However, the present invention is not limited thereto, and various numbers of links may be formed depending on the size of the link body 221. The user may vary the portion of the first link hole 223 connected to the rotor 230 to adjust the reciprocating distance of the reciprocating frame 250. [

For example, if the user wants to reduce the reciprocating distance of the reciprocating frame 250, the rotor 230 is inserted into the first link hole 223a relatively close to the second link hole 225 in the link rod 220, As shown in FIG. In this case, since the reciprocating distance of the link rod 220 due to the rotation of the rotor 230 is shortened, the reciprocating distance of the reciprocating frame 250 also decreases.

Conversely, if the user wishes to increase the reciprocating distance of the reciprocating frame 250, the first link hole 223b, which is relatively far from the second link hole 225 in the link rod 220, (233). In this case, since the reciprocating distance of the link rod 220 due to the rotation of the rotor 230 becomes long, the reciprocating distance of the reciprocating frame 250 also increases.

At this time, when the user connects the outermost connector 233b of the rotor 230 and the first link hole 223b, the reciprocating distance of the link rod 220 according to the rotation of the rotor 230 becomes maximum, It is possible to maximize the reciprocating distance of the piston 250.

Of course, when the user connects the first link hole 223a to the connection hole 233a closest to the center of the rotor 230, the reciprocating distance of the link rod 220 according to the rotation of the rotor 230 is minimized, The reciprocating distance of the reciprocating frame 250 can be minimized.

Through this reciprocating motion, the separation membrane is allowed to continuously flow during the filtration of the sludge, so that the separation membrane can be cleaned by allowing the sludge to fall off due to inertia. This ultimately prevents the clogging of the membrane and maintains the efficiency of the system.

Further, since the reciprocating distance of the reciprocating frame 250 can be adjusted as described above, the reciprocating distance (amplitude) can be efficiently adjusted according to the degree of contamination of the membrane module 700 through the inter-membrane pressure difference (TMP) measurement, You can save more. This is explained in detail in the following control method.

Next, the sliding means 500 may be disposed in the processing tank 300 and associated with the reciprocating means 200, and may be provided to guide the moving direction of the membrane supporting frame 600. The sliding means 500 may be presented in four forms in an embodiment of the present invention. Hereinafter, each embodiment will be described.

[First Embodiment]

5 and 6 are views showing a first embodiment of the sliding means 500 in the invention shown in FIG.

Referring to FIGS. 5 and 6, the first embodiment of the sliding unit 500 may include a guide rail 511 and a rolling member 515. The guide rails 511 may be arranged on both sides of the treatment tank 300 in a pair by bolting or welding, and may have a rectangular cross-section.

The rolling member 515 is disposed at the lower end of the reciprocating frame 250 and can be seated on the upper end of the guide rail 511. The rolling member 515 may include a wheel block 513 and a rolling wheel 514. The wheel block 513 is fastened or welded to the lower end of the reciprocating frame 250 with a bolt 513a And the rotating shaft 514b of the rolling wheel 514 is fitted in the through hole 513a of the wheel block 513 so as to be rotatably mounted on the wheel block 513. [

Here, the rolling wheel 514 may include a center wheel portion 514a and a support wheel portion 514c. The center wheel portion 514a is mounted on the guide rail 511 and supports a load of the reciprocating frame 250. The support wheel portion 514c is a portion extended to the side surface of the guide rail 511 so that the reciprocating frame 250 does not move between movements. As a result, the rolling wheel 514 does not separate from the guide rail 511 between the reciprocating motions, thereby enabling relatively stable starting.

At both ends of the guide rail 511, a stopper 512 may be disposed to prevent the rolling wheel 514 from being separated.

[Second Embodiment]

7A and 7B are views showing a second embodiment of the sliding means 500 in the invention shown in FIG.

Referring to FIGS. 7A and 7B, the second embodiment of the sliding device 500 may include a guide rail 521 and a rolling member 525. The guide rails 521 may be disposed on both sides of the treatment tank 300 in a pair of bolts or welded joints. The guide rails 521 may be tapered from the outer side toward the inner side.

The rolling member 525 may be disposed on both sides of the lower end of the reciprocating frame 250 and may include a wheel support 523 and a teeter wheel 524. The wheel support 523 may be connected to the lower end of the reciprocating frame 250 by fastening or welding the bolts 523a. The rotating shaft 524a of the tapered wheel 524 is fitted in the through hole 523a of the wheel support 523 and is rotatably connected to the tapered wheel 524 and tapered toward the outer side from the center side.

The tapered shape of the guide rail 521 and the tapered shape of the rolling member 525 correspond to each other so that the rolling member 525 stably stays on the upper end of the guide rail 521, 250). At this time, a stopper 522 may be disposed at both ends of the guide rail 521 to prevent the taper wheel 524 from being separated.

[Third Embodiment]

8A and 8B are views showing a third embodiment of the sliding means 500 in the invention shown in FIG.

8A and 8B, a third embodiment of the sliding device 500 may be configured to include a linear guide 531, a ball bearing 534, and a moving beam 533. The linear guides 531 may be arranged on both sides of the treatment tank 30 in the longitudinal direction by bolting or welding. At this time, a ball bearing 534 may be disposed on the linear guide 531 to smoothly move the moving beam 533.

The moving beam 533 may be fastened or welded to a lower end of the reciprocating frame 250 and may be seated on the linear guide 531. When the reciprocating frame 250 reciprocates by the driving unit 205, the moving beam 533 moves on the linear guide 531. At this time, the moving beam 533 is transmitted to the linear guide 531, And is moved in a state of being seated in the inner groove 531a of the cylinder block 531, so that stable start-up is possible without departing from the outside.

A stopper 532 may be disposed at both ends of the linear guide 531 to prevent the movement beam 533 from being excessively deviated in the longitudinal direction.

[Fourth Embodiment]

9A and 9B are views showing a fourth embodiment of the sliding means 500 in the invention shown in FIG.

9A and 9B, a fourth embodiment of the sliding means 500 may comprise a guide rail 551, a wheel block 561, a rolling wheel 571 and a support unit 580 have.

The guide rails 551 may be arranged on both sides of the upper end of the treatment tank 300 along the longitudinal direction by a bolt fastening 554 or welded. The guide rails 551 may be formed into an H beam shape and the upper edge portion of the guide rail 551 may have a first protrusion 552 extending in the downward direction and being linearly formed along the guide rail 551 .

The wheel block 561 may be fastened or welded to a lower end of the reciprocating frame 250 by bolts 562. The rolling wheel 571 may be rotatably mounted on the wheel block 561 have.

The rotation shaft 573 of the rolling wheel 571 is inserted into the through hole 566 of the wheel block 561 and the wheel cap 574 is fastened to the bolt 575 to be rotated by the wheel block 561 You can connect. At this time, the bearing 565 is disposed on the wheel block 561 to smoothly rotate the rolling wheel 571, and the shaft cover 563 can be fixed by fastening the bolts 564.

The rolling wheel 571 may be formed in a disk shape, and a second protrusion 572 protruding toward the center of the rolling wheel 571 may be formed on the outer circumferential surface in the circumferential direction.

The support unit 580 may be interlocked with the rolling wheel 571 and the guide rail 551 so that the rolling wheel 571 is not separated from the guide rail 551. The support unit 580 may include a first body portion 581, a second body portion 583, a first support wheel 582, and a second support wheel 584.

The first body 581 may be a portion of the guide rail 551 that is fitted to the first straight protrusion 552 of the guide rail 551. The first support wheel 582 is disposed inside the first body portion 581 and the first support wheel 582 is linearly moved along the first projection 552.

At this time, the first support wheel 582 is mounted on the wheel body 582b, and the wheel body 582b is fastened to the inside of the first body portion 581 with a bolt 582c .

The second body portion 583 may be a portion that is fitted to the second projection 572 of the rolling wheel 571. [ The second support wheel 584 is disposed on the inner side of the second body 583 and the second support wheel 584 is rotatably supported on the second protrusion 572 .

At this time, the second support wheel 584 is mounted on the wheel body 584b with the rotation wheel 584a, and the wheel body 584b is fixed to the inside of the second body part 583 with bolts 584c .

The first body part 581 and the second body part 583 may be connected to each other by fastening bolts 586. In this case, since the first body portion 581 and the second body portion 583 support the first projection 552 and the second projection 572 in close contact with each other, The guide rail 551 is brought into tight contact with the guide rail 551 without being detached therefrom.

Based on the above-described embodiments, the sliding means 500 of the present invention enables more stable and smooth starting when the membrane support frame 600 performs the linear motion by the reciprocating means 200, And to improve the fluidity of the separator.

Hereinafter, the sludge lifting unit 400 of the present invention will be described. Since the sludge lifting effect by air refining can not be obtained because the air refining method is not used, it is possible to prevent the sludge from accumulating and accumulating in the treatment tank 300 by including the separate sludge lifting unit 400 So that the filtration action through the membrane module can be facilitated.

[First Embodiment]

According to the first embodiment, the sludge lifting unit 400 may be formed of a vane member 410 and will be described with reference to FIGS. 10 and 11. FIG. Fig. 10 is a side view showing a vane member according to the present invention, and Fig. 11 is an operational state view of the invention shown in Fig.

The vane member 410 may be disposed at the lower end of the membrane support frame 600 and may be provided to float sludge accumulated in the lower portion of the treatment tank 300. The vane member 410 may include a vane body 411 and a floating blade 413. [

The vane body 411 may be disposed at a lower end of the membrane support frame 600, and a plurality of the vane bodies 411 may be attached in the width direction of the membrane support frame 600. In the embodiment of the present invention, referring to FIG. 10, it can be seen that three are mounted on the lower end of the membrane support frame 600. However, the number of the vane bodies 411 may be different depending on the viscosity of the sludge, the amount of the sludge, and the like.

For example, when the sludge is highly viscous and requires a strong swirl for floatation, when a large amount of sludge is accumulated because the sludge amount is accumulated, the user can easily recognize the number of the vane bodies 411 attached to the lower end of the membrane support frame 600 . As the number of the vane bodies 411 increases, the number of the floating wings 413 coupled thereto also increases correspondingly.

The floating blade 413 may be connected to the lower end of the vane body 411 at a predetermined angle? So that the sludge may float between the reciprocating motions of the membrane support frame 600. In the embodiment of the present invention, it may be 150 degrees, but it is not necessarily limited to this, but it may be set at another angle depending on the distance from the bottom of the treatment tank 300, the thickness of the sludge layer, and the like.

11, when the membrane support frame 600 reciprocates, the floating wings 413 move in the reciprocating motion direction of the membrane support frame 600 and accumulate at the lower end of the treatment tank 300, Thereby causing swirling of the sludge.

As a result, the sludge is floated, and filtration is performed through the separation membrane 700 again.

[Second Embodiment]

Meanwhile, according to the second embodiment, the sludge lifting unit 400 may include the sludge lifting unit 420 and will be described with reference to FIGS. 12 to 15. FIG. FIG. 12 is a side view showing the sludge lifting means of the present invention, FIG. 13 is a side sectional view of the sludge lifting means in the invention shown in FIG. 12, FIG. 14 is a rear view of the sludge lifting means in the invention shown in FIG. 15 is an operational state diagram of the invention shown in Fig.

The sludge lifting means 420 may be retractably disposed at the lower end of the membrane supporting frame 600 so as to float the sludge accumulated in the lower part of the treatment tank 300. The sludge lifting means 420 includes a first vane body 421, a second vane body 441, a third vane body 470, a lift unit 430, a floating blade 480, an elastic body 450, And a buffer pad 460.

The first vane body 421 may be mounted on the lower end of the membrane support frame 600. The second vane body 441 may be connected to the lower end of the first vane body 421. Specifically, a first space 421a is formed in the first vane body 421, and a part of the second vane body 441 is disposed in the first space 421a so as to be movable in a vertical direction . The first cover 423 is fastened by fixing the bolt 424 and the first sealing pad 425 is fixed to the inner surface of the first cover 423 and the second vane body 441 to prevent the inflow of the fluid, As shown in FIG.

The elevating unit 430 is interlocked with the first vane body 421 and the second vane body 441 and may be provided to move the second vane body 441 upward or downward. The elevating unit 430 may include a hydraulic cylinder 431 and an elevating rod 433. The hydraulic cylinder 431 may be formed by bolting or welding a bolt on one side of the first vane body 421, And can be fixed. 13 and 14, when the lifting rod 433 is coupled to the second vane body 441, the lifting rod 433 may be connected to the rod of the hydraulic cylinder 431 by bolting or welding. In the longitudinal direction.

When the user drives the hydraulic cylinder 431, the lifting rod 433 moves in the vertical direction to adjust the vertical position of the floating wing 480. This makes it possible to select an appropriate position capable of effectively lifting the accumulated sludge at the bottom of the treatment tank 300 without the float wing 480 colliding with the bottom of the treatment tank 300.

The third vane body 470 is connected to the lower end of the second vane body 441. Specifically, as shown in FIG. 13, the second vane body 441 has a second space 441a A second vane body 470 and a third vane body 470. The third vane body 470 is disposed such that a part of the third vane body 470 can be raised and lowered to prevent the inflow of fluid into the inner surface of the second vane body 441 and the outer surface of the third vane body 470, A sealing pad 455 may be disposed.

At this time, the floating blade 480 may be connected to the lower end of the third vane body 470 so that the sludge is floated between the reciprocating motions of the membrane support frame 600. The floating vane 480 may be disposed at a predetermined angle? With the third vane body 470. In the embodiment of the present invention, it may be 150 degrees, but it is not necessarily limited to this, but it may be set at another angle depending on the distance from the bottom of the treatment tank 300, the thickness of the sludge layer, and the like.

The elastic body 450 may be disposed between the second vane body 441 and the third vane body 470 so as to mitigate an impact applied to the bottom of the treatment tank 300 by the floating blade 480. [ . The elastic body 450 may be disposed in the second space 441a of the second vane body 441 and may be fixed by fastening the second cover 443 and bolts 444. [ The lower side of the elastic body 450 is in contact with the upper side of the third vane body 470.

If the float flaps 480 are brought into contact with the bottom of the treatment tank 300, the float flaps 480 are subjected to an impact force in the upward direction due to the collision. At this time, the third vane body 470 is lifted by the elastic body 450, thereby alleviating the impact force.

The buffer pad 460 may be disposed at an end of the floating blade 480 to mitigate an impact applied to the bottom of the treatment tank 300 when the floating blade 480 collides with the bottom of the treatment tank 300. The buffer pad 460 may be formed of an elastic material such as rubber, silicone, or plastic.

The function is such that the cushioning pad 460 is impacted first before the float 480 collides with the bottom of the treatment tank 300 and the impact force applied to the float 480 is first canceled by the elastic force .

That is, in the embodiment of the present invention, when the floating blade 480 collides with the bottom of the processing tank 300, the buffer pad 460 primarily absorbs the impact by the elastic material, The third vane body 470 is lifted and lowered to thereby secondarily alleviate the impact. Which ultimately prevents damage to the float 480.

15, an operation state of the sludge lifting means 420 is illustrated. Referring to FIG. 15, while the membrane supporting frame 600 reciprocates, the sludge lifting means 420, The lifting means 420 reciprocates together to generate a swirl, thereby confirming the state of lifting the sludge.

At this time, even if the float 480 excessively approaches the bottom of the treatment tank 300, the shock absorbing pad 460 primarily absorbs the impact, The impact force transmitted to the body 470 is secondarily relieved by the elastic body 450, so that equipment damage can be prevented between the operations.

The separator module 700 may be formed of any one of spiral wound, tubular, hollow fiber, and plate and frame, and in particular, Is 0.2 to 2 mm and the center is empty, it is preferable that the hollow fiber membrane has a high productivity because the membrane area ratio per unit volume of the hollow fiber membrane is very large compared to other types.

Accordingly, in the present embodiment, the hollow fiber membrane bundle is formed to form the separation membrane module 700, and the hollow fiber separation membrane can be used in such a manner that the hollow fiber membrane is filtered out of the hollow fiber membrane and sucked in the opposite direction, The method of using the hollow fiber membrane in the activated sludge method used for the treatment of sewage and sewage also has an external type of circulation (external type) and a method of submerged module directly in the bioreactor (submerged type). In this embodiment, description will be made on the basis of a method of sucking filtered water from the outside of the separation membrane module 700 and a method of directly immersing the separation membrane module 700 in the treatment tank 300.

The separation membrane module 700 includes an upper frame 710 and a lower frame 720 and the upper frame 710 and the lower frame 720 are connected to each other, A plurality of hollow fiber membranes 730 may be bundled and fixed.

At this time, the upper frame 710 and the lower frame 720 are symmetrically formed in the same shape, and may be formed in various shapes. In the present embodiment, the upper frame 710 and the lower frame 720 have a long rectangular shape.

The hollow fiber membrane 730 is fixed at both ends to the upper frame 710 and the lower frame 720. The hollow fiber membrane 730 has a collecting part 711 formed inside the upper frame 710 and a hollow fiber membrane 730 The hollow fiber membrane 730 may be inserted into the hollow fiber membrane 730 to communicate with the hollow fiber membrane 730. Accordingly, the filtered water that is sucked from the outside to the inside of the hollow fiber membrane and collected may be collected in the collecting part 711. In this regard, the following section will be discussed in detail.

In the above description, both ends of the hollow fiber membrane are fixed to the upper frame and the lower frame, but according to another embodiment, the hollow fiber membrane is fixed between the upper frame and the lower frame, and both ends of the hollow fiber membrane are fixed And may be wound in a U-shape through a fixing bar provided in the lower frame. For example, the fixing bar may be a rod having a space through which the hollow fiber membrane can pass.

At this time, the hollow fiber membrane 730 is formed like a curtain along the longitudinal direction of the frame, and the hollow fiber membrane 730 is formed as a bundle for each predetermined length, and the hollow fiber membrane 730 may be spaced apart by a certain distance for each bundle. This is because if the membrane is formed too tightly along the longitudinal direction, the water will stagnate and the fouling may become worse, so that the water can flow well by giving a little of the separation distance.

As described below, a plurality of the separation membrane modules 700 may be disposed inside the membrane support frame 600. In this case, since the air purification process is not used, The water between the modules may become stagnant and the fouling may become worse. Therefore, the density of the membrane module 700 should be lowered so that the water can flow well between the modules.

Accordingly, as shown in FIG. 22, the upper frame 710 and the lower frame 720 may be provided with spacing portions in order to keep the spacing between the separation membrane modules 700 constant. More specifically, one or more gap holding portions 712 may be formed on both sides of the upper frame 710 to protrude by a predetermined length. Similarly, one or more gap holding portions 712 may be formed on both sides of the lower frame 720, And a protrusion 722 protruding therefrom. At this time, it is preferable that the position of the upper frame interval retaining part 712 and the position of the lower frame interval retaining part 722 are formed at the same position and are symmetrical to each other, and the interval maintaining part is formed integrally with the upper frame or the lower frame Or may be a structure formed separately and bonded.

In the present embodiment, two spacing portions 712 and 722 are formed on both sides of the upper frame 710 or the lower frame 720, and are located at both ends in the longitudinal direction of the frame. The space holding portions 712 and 722 are formed protruding from the upper frame 710 or the lower frame 720 at intervals of 1 cm so that when the plurality of the separation membrane modules 700 are disposed, The gap holding portion of the module 700 is abutted against each other, so that the interval between the modules can be kept constant at 2 cm.

However, the present invention is not limited thereto, and the gap holding part may be formed to protrude at least 1 cm from the upper frame or the lower frame, so that the interval between the modules can be maintained at 2 cm or more, It is irrelevant. At this time, it is preferable that the interval between the modules is 2 cm or more in order to allow the water to flow without stagnation between the membrane modules 700. However, if the interval is too wide, the installation space of the membrane module becomes large, Is preferably 4 cm or less.

In addition, the gap holding portions 712 and 722 may further include a coupling portion that allows the gap holding portions 712 and 722 to easily engage with other gap holding portions facing each other. For example, the coupling portion may be formed of a magnet, and an S pole may be formed in the gap holding portion located on one side of the frame, and an N pole may be formed in the gap holding portion located on the other side. So that coupling can be performed. Accordingly, despite the reciprocating movement of the separation membrane module 700, the interval between the modules can be maintained firmly.

Next, a structure in which the membrane support frame 600 of the present invention and a plurality of separation membrane modules 700 are installed inside the membrane support frame 600 will be described.

[First Embodiment]

First, the structure of the membrane support frame 600 according to the first embodiment and the separation membrane module 700 disposed therein will be described with reference to FIG. In FIG. 23, four membrane modules are illustrated as being arranged in one membrane support frame to effectively show the arrangement structure of the membrane module. However, the present invention is not limited thereto. It is needless to say that dozens of membrane modules may be arranged in excess of one another.

In this embodiment, the membrane support frame 600 may include an auxiliary frame 620 to which a plurality of separation membrane modules 700 are installed, and the auxiliary frame 620 may have a rectangular shape, It is generally provided on the lower side of the support frame 600. Accordingly, the plurality of separation membrane modules 700 may be coupled to the auxiliary frame 620 by using bolts or by fitting a plurality of separation membrane modules 700 to a rail formed on the auxiliary frame 620. Specifically, the lower frames 720 of the separation membrane module are installed on the auxiliary frame 620, and the upper frames 710 of the separation membrane module are fixed to the membrane support frame 600, Can be fixed to the frame.

However, the present invention is not limited thereto, and the separator module 700 may be installed in the auxiliary frame 620 in various manners, and the plurality of separator modules 700 may be installed directly in the membrane support frame 600 .

The auxiliary frame 620 may be formed as a rectangular plate corresponding to a lower surface of the membrane support frame 600 or may be formed in a direction in which a plurality of separation membrane modules 700 are disposed in the membrane support frame 600 And may have a plurality of bar shapes formed in parallel to the lower portion of the membrane support frame 600 according to the shape of the support frame 600.

The plurality of separation membrane modules 700 may be installed in parallel to the inside of the membrane support frame 600, that is, on the auxiliary frame 620. In this embodiment, each separation membrane module 700 has a long rectangular shape The installation structure of the entire combined membrane module becomes a square or a rectangular shape as shown in FIG.

A plurality of membrane supporting frames 600 are disposed inside the treatment tank 300. Since the overall installation structure of the separation membrane module 700 is formed in a rectangular shape as described above, the separation membrane module 700 can be densely arranged Accordingly, the dead zone in the treatment tank 300 can be minimized, and the filtering performance can be improved. However, the present invention is not limited thereto, and the installation structure of the separation membrane module may be arranged in various shapes.

In this case, since the space holding portions 712 and 722 are formed in the upper frame 710 and the lower frame 720 of the separation membrane module, when the plurality of separation membrane modules 700 are arranged side by side, .

[Second Embodiment]

Next, the structure of the membrane support frame 600 according to the second embodiment and the separation membrane module 700 disposed therein will be described with reference to FIG.

In this embodiment, the membrane supporting frame 600 is formed in the shape of a rectangular frame, and further includes a filtration pipe 640 formed on the upper side of the membrane supporting frame 600. Specifically, the filtration pipe 640 is installed to cross the center of the upper surface of the membrane support frame 600.

Like the first embodiment, it may include an auxiliary frame 620 for installing a plurality of separation membrane modules 700. The auxiliary frame 620 may be provided on the lower side of the membrane support frame 600 It is common.

A plurality of coupling holes 642 for coupling the plurality of separation membrane modules 700 are formed on both sides of the filtration pipe 640. The upper frames 710 of the separation membrane module are coupled to the coupling holes 642 So that the collecting part 711 formed in the upper frame 710 and the filtration pipe 640 can communicate with each other. That is, in the present embodiment, the filtration pipe 640 is arranged so as to be perpendicular to the reciprocating direction of the reciprocating frame 250, and a plurality of separation membrane modules 700 are symmetrically and juxtaposed on both sides.

At this time, since the plurality of membrane support frames 600 are arranged consecutively in the direction in which the reciprocating frame 250 reciprocates, the filtration pipe is arranged in parallel with the reciprocating motion direction It is more preferable to be arranged as in this embodiment rather than being disposed.

Accordingly, in the plurality of separation membrane modules, the filtered water collected in the collecting part 711 can be collected in the filtration pipe 640, which will be described in detail below. Each of the lower frames 720 of the separation membrane module 700 is coupled to the auxiliary frame 620 using bolts or a plurality of separation module modules 700 are fitted to the rails formed on the auxiliary frame 620, . However, the present invention is not limited thereto, and the separator module 700 may be installed in the auxiliary frame 620 in various manners, and the plurality of separator modules 700 may be installed directly in the membrane support frame 600 .

24, the separation membrane module 700 can be densely arranged in the same manner as in the first embodiment, so that the treatment tank 300 ) Can be minimized so that the filtration capability can be improved.

In this case, since the space holding portions 712 and 722 are formed in the upper frame 710 and the lower frame 720 of the separation membrane module, when the plurality of separation membrane modules 700 are arranged side by side, .

Further, in the description of the installation structure of the separation membrane module in the above description, a description has been given based on the fact that a certain interval is maintained between the separation membrane modules 700. However, the separation membrane module formed only on one side of the frame, Two separation membrane modules each formed with a gap holding part on the right side are bundled to form one set, so that the two separation membrane modules can be arranged so as to maintain a constant gap. Further, it is needless to say that the three separation membrane modules may be formed into one set so that a constant interval is maintained for each of the three modules.

Accordingly, it is possible to improve the filtration ability by forming the separation membrane more densely while preventing water from stagnating between the separation membrane modules.

An inertial force acting on the separator module 700 is generated due to the reciprocating motion of the separator module 700 by the reciprocating means 200. This causes the attachment of contaminants to the surface of the separator membrane 700 Or remove contaminants from the surface of the separator.

At this time, in order to maximize the effect of preventing or removing the foreign matter by inertial force, the looseness of the separation membrane should be maintained at an appropriate level.

This is because if the separation membrane module 700 does not sag, the separation membrane module 700 is reciprocated integrally due to the reciprocating motion of the membrane support frame 600, but inertia is hardly imparted and the separation membrane module 700 is broken or damaged This is because it is difficult to impart inertia even when the distance is too much, and the reciprocating distance of the membrane module 700 is increased, which results in a large installation space.

The length of the hollow fiber membrane 730 may be greater than 0% and less than 10% of the distance Lo between the upper frame 710 and the lower frame 720 . That is to say, the length of the hollow fiber membrane 730 connected to the upper frame 710 and the lower frame 720 is not more than 10% of the maximum length (hereinafter referred to as the 'minimum separation membrane length) But it is particularly desirable to provide an allowance of 5% to 10%.

25, the length Lf of the maximum separation membrane capable of generating inertia in the separation membrane due to the reciprocating motion is determined by the length of the minimum separation membrane, that is, the vertical distance between the upper frame 710 and the lower frame 720 Lo of the separation membrane module and the reciprocating motion distance a of the separation membrane module and the degree of looseness of the separation membrane module 700 can be calculated by dividing the length Lf of the maximum separation membrane by the length Lo of the minimum separation membrane Value. That is, the looseness of the separation membrane module 700 should be more than 1 and less than 1.1, and more preferably 1.05 or more and 1.1 or less.

For example, if the distance Lo between the upper frame 710 and the lower frame 720 is 500 mm based on the reciprocating distance a of the separator module 700 being 100 mm, As shown in FIG. 26, the length Lf of the maximum separation membrane can be calculated to be 538.5 mm by the nature of the triangle, and 1.08 (accurately, 1.077) can be obtained by calculating the looseness Do. However, at this time, if the reciprocating distance is 150 mm, the length Lf of the maximum separation membrane becomes 583.1 mm and the degree of sagging is approximately 1.17 (exactly 1.166), which is greater than 1.1, which is not preferable. In this case, the reciprocating motion distance can be reduced or the minimum separation membrane length can be increased.

Also, when the reciprocating distance of the separator module 700 is 100 mm, if the length Lo of the minimum separator is 750 mm, the length Lf of the maximum separator is calculated as 776.2 mm and the degree of sagging is 1.03, The length Lf of the maximum separation membrane is calculated as 1019.8 mm and the degree of sagging is approximately 1.02, which is all appropriate.

However, when the reciprocating distance of the separation membrane module 700 is 100 mm as described above, when the length Lo of the minimum separation membrane is 1500 mm, the length Lf of the maximum separation membrane is calculated as 1513.3 mm and the degree of sagging approaches 1 It is difficult to impart inertia to the separation membrane. In this case, the reciprocation distance of the separation membrane module 700 must be further increased or the length Lo of the minimum separation membrane must be reduced.

As described above, the degree of sagging of the separation membrane module 700 is important in reducing or eliminating the contamination of the separation membrane due to the reciprocating motion, and furthermore, the degree of sagging of the separation membrane module 700 is adjusted according to the reciprocating distance of the membrane filtration system. A length adjusting unit may be further provided.

The length adjuster may be configured to adjust the length of the minimum separation membrane, that is, the length between the upper frame 710 and the lower frame 720, and may also be formed to adjust the length of the separation membrane itself. This will be described in detail below according to the embodiment.

Referring to FIG. 26, the length adjusting unit 740 includes a length adjusting unit 740 for adjusting the length between the upper frame 710 and the lower frame 720, The upper frame 620 of the membrane support frame to which the lower frame 720 is fixedly installed.

Specifically, the length adjuster 740 according to the first embodiment may include a hydraulic cylinder 742 positioned below the auxiliary frame 620, and the hydraulic cylinder 742 may be connected to the auxiliary frame 620 Or may be bolted or welded and fixed.

At least one hydraulic cylinder 742 may be installed at a lower portion of the auxiliary frame 620, and the hydraulic cylinder 742 may be disposed at an appropriate position according to the number. In this embodiment, the four hydraulic cylinders 742 are arranged at the respective corner points of the auxiliary frame 620 formed in a square.

Accordingly, when the user drives the hydraulic cylinder 742, the lower frame 720 of the separator module is moved while the upper frame 710 of the separator module is fixed while the auxiliary frame 620 is moved in the vertical direction as a whole So that the length of the minimum separation membrane can be adjusted. That is, when the auxiliary frame 620 is moved upward by driving the hydraulic cylinder 742 while maintaining the length of the separation membrane, the lower frame 720 also moves upward, and the distance from the upper frame 710 The length of the minimum separation membrane is reduced, and the degree of sagging of the separation membrane module 700 is increased.

Conversely, when the hydraulic cylinder 742 is driven to move the auxiliary frame 620 downward, the lower frame 720 also moves downward to increase the distance from the upper frame 710, The degree of sagging of the separation membrane module 700 is reduced.

At this time, the operation of the hydraulic cylinder 742 may be performed by the user, but the length of the minimum separation membrane according to the degree of sagging of the separation membrane depending on the reciprocation distance or the reciprocation period of the separation membrane is calculated, A calculation unit 744 for calculating the same amount, and a driving unit 746 for transmitting the computed upper and lower amounts to the hydraulic cylinder 742, so that the operation of the hydraulic cylinder can be automatically controlled.

Next, referring to FIG. 27, the length adjuster 1740 according to the second embodiment of the present invention will be described with reference to FIG. 27, wherein the length adjuster 1740 is disposed between the upper frame 710 and the lower frame 720 The upper frame 710 of the separation membrane module is fixed to move the position of the lower frame 720 up and down so as to adjust the length of the lower frame 720, 620 are vertically driven.

Specifically, the length adjuster 1740 according to the second embodiment includes a shaft 1742 provided under the auxiliary frame 620, at least one cam coupled to the shaft 1742 and integrally rotatable therewith, A motor 1744 for rotating the shaft 1742, and a motor 1746 for rotating the shaft 1742. The motor 1746 may be installed inside the treatment tank 300, but may be installed outside.

A plurality of the shafts 1742 may be formed on the lower portion of the auxiliary frame 620. In this embodiment, two shafts are formed to face each other in alignment with the corners of the auxiliary frame 620. One or more cams 1744 are integrally rotatable in accordance with the rotation of the shaft 1742. The radius of the cams is varied according to the rotation of the cams 1744, Can be adjusted.

At this time, although the operation of the motor 1746 may be performed by the user, the calculation unit for calculating the upper and lower moving amounts of the auxiliary frame 620 and the calculated upper and lower moving amounts are transmitted to the motor 1746 as in the first embodiment And a driving unit for controlling the rotation of the shaft 1742 so as to be automatically performed.

Although not shown in the drawing, the length adjuster may be formed to adjust the length of the separation membrane itself according to the embodiment. Specifically, one end of the separation membrane module, that is, The entire length of the separator module can be adjusted by winding or loosening one end of the separator module.

The present invention may further include an interval measuring unit 810 and an interval adjusting unit 820 according to an embodiment, which will be described in detail below with reference to an embodiment.

[First Embodiment]

16A and 16B are views showing an embodiment of the gap measuring unit of the present invention. 16A and 16B, the gap measuring unit 810 of the present invention may be provided to measure the gap between the membrane support frame 600 or the vane member 410 and the treatment bath 300. [

The interval measuring unit 810 may include a first interval measuring sensor 811 and a second interval measuring sensor 813. The first interval measuring sensor 811 may include the membrane supporting frame 600, The second interval measuring sensor 813 may be a sensor for measuring the interval between the vane member 410 and the bottom of the treatment tank 300 .

16A, the first gap measuring sensors 811 are arranged on both sides of the membrane supporting frame 600 so that the gap between the membrane supporting frame 600 and the inner wall of the processing tank 300 is .

If the interval measured by the sensor on one side is relatively narrow compared to the interval measured by the sensor on the other side, or if the interval is less than the predetermined interval, the first interval measuring sensor 811 sends a signal The user stops the driving of the reciprocating means 200 and then repositiones the left and right positions of the membrane supporting frame 600 connected to the reciprocating frame 250 by bolt fastening or the like so that the treatment tub 300 ) You can prevent collisions with the inner wall.

16B, it can be seen that the second gap measuring sensor 813 is disposed on the floating blade 413 of the vane member 410. [ As the membrane support frame 600 reciprocates, the vane member 410 also reciprocates. At this time, the vertical position of the float wing 413 may be changed by various vibrations, shaking, or the like.

At this time, the second interval measuring sensor 813 measures a distance from the bottom of the processing tank 300, and if the interval is less than the predetermined allowable interval value, it gives a signal to the controller of the user, Stop driving. Thereafter, the vertical position of the membrane support frame 600 connected to the reciprocating frame 250 by bolt fastening or the like is reset to prevent the float wing from colliding with the bottom of the treatment tank 300.

[Second Embodiment]

FIG. 17 is a top view showing an embodiment of the gap adjusting means of the present invention, FIG. 18 is a partial side view of the first gap adjusting portion in the invention shown in FIG. 17, 20 is a side sectional view showing the interlocking of the sludge lifting means and the second gap adjusting part in the invention shown in FIG. 19, FIG. 21 is a side view showing the sludge lifting means and the second gap adjusting part in the invention shown in FIG. And Fig.

17 to 21, the gap adjusting means 860 of the present invention can be provided to adjust the gap between the membrane supporting frame 600 or the sludge flooding means 420 and the treatment tank 300 have. The gap adjusting unit 860 may include a first gap adjusting unit 820 that adjusts the gap between the membrane supporting frame 600 and the inner wall of the treatment tank 300 and a second gap adjusting unit 820 that adjusts the gap between the sludge lifting unit 420 and the treatment tank 300. [ And a second gap adjusting unit 850 for adjusting the gap between the bottoms of the first and second substrates 300 and 300.

The first interval adjusting unit 820 includes a control cylinder 821, a moving unit 820a, a first proximity sensor 829, a first interval calculating unit 828, a first hydraulic pressure calculating unit 827, And may include a first driving unit 826. 17, in the embodiment of the present invention, two membrane support frames 600 are connected to the reciprocating frame 250, and the adjustment cylinder 821 is connected to the pair of membrane support frames 600 (Not shown).

The moving unit 820a is connected to the rod of the regulating cylinder 821 and supports the membrane supporting frame 600 and can be arranged to be movable in the width direction of the reciprocating frame 250. The moving unit 820a may be configured to include a moving rail 825 and a moving block 822. [

18, the moving rail 825 may be disposed in the width direction of the reciprocating frame 250 and the moving block 822 may be disposed on the moving wheel 823 to move along the moving rail 825, And may be connected to the membrane support frame 600 by a support beam 824. [

The first proximity sensor 829 may be disposed on a side of the membrane support frame 600 and the first gap calculator 828 may calculate a signal And may be provided to measure the distance between the frame 600 and the inner wall of the treatment tank 300.

The first hydraulic pressure calculation unit 827 may convert the calculated value of the first interval calculation unit 828 into a hydraulic driving value and give a signal to the first driving unit 826. The first drive unit 826 may be provided to drive the adjustment cylinder 821 according to the hydraulic drive value of the first hydraulic pressure calculation unit 827.

The first proximity sensor 829 transmits information to the first gap calculator 828 when the gap between the inner wall of the treatment tank 300 and the membrane support frame 600 does not reach the preset allowable gap value The first interval calculating unit 828 calculates the interval and then transmits the information to the first hydraulic amount calculating unit 827 to calculate the required hydraulic pressure value in the first hydraulic amount calculating unit 827 do.

Then, when the calculation is made, the information is transmitted to the hydraulic driving unit, and the adjusting cylinder 821 advances or retracts the moving block 822 as necessary. Accordingly, the moving block 822 moves along the moving rail 825 to adjust the position of the membrane supporting frame 600.

At this time, a side block is disposed in the reciprocating frame 250 to assist in supporting the membrane supporting frame 600. Referring to FIG. 17, the first side block is disposed at four edges of the reciprocating frame 250, and is also connected to and supported by the membrane support frame 600 by the support beam 832.

At this time, the protrusion 831a of the first side block may be disposed in contact with the linear bearing 833 so that the linear movement of the second side block 834 is smooth, and the user tightens the cover 835 with the bolts 835 Can be fixed. Four of them are disposed on the reciprocating frame 250 to support the movement of the membrane supporting frame 600 in the width direction by the regulating cylinder 821, respectively.

Next, the second interval adjusting unit 850 includes a second proximity sensor 851, a second interval calculating unit 852, a second hydraulic pressure calculating unit 853, and a second driving unit 854 .

The second proximity sensor 851 may be disposed on the flap 480 to measure the distance between the flap 480 and the bottom of the treatment tank 300. The second interval calculator 852 may be provided to calculate the interval between the flotation blade 480 and the bottom of the treatment tank 300 by a signal sent from the second proximity sensor 851.

The second oil pressure calculation unit 853 may be provided to convert the calculated value of the second interval calculation unit 852 into a hydraulic drive value. The second driving unit 854 may be provided to drive the hydraulic cylinder 431 in accordance with the hydraulic driving value of the second hydraulic-pressure calculating unit 853.

For example, if the second proximity sensor 851 measures the gap between the floating blade 480 and the bottom of the treatment tank 300 and is less than a preset allowable gap value, . The second interval calculating unit 852 calculates the interval between the floating wing 480 and the bottom of the treatment tank 300 from the signal sent from the second proximity sensor 851, The second hydraulic pressure calculation unit 853 converts the hydraulic pressure value to a hydraulic driving value and then gives a signal to the second driving unit 854. [

Accordingly, the second driving unit 854 drives the hydraulic cylinder 431 to adjust the vertical position of the second vane body 441. When the position of the second vane body 441 is moved upward, the third vane body 470 and the floating vane 480 connected to the lower end of the second vane body 441 are also moved upward It will be adjusted.

The first gap adjusting unit 820 and the second gap adjusting unit 850 may calculate the gap between the membrane supporting frame 600 or the sludge lifting unit 420 and the treatment tank 300. For example, And if it does not fall within the predetermined allowable range, it is possible to automatically adjust the interval and prevent the equipment operation efficiency and the equipment damage due to the impact between the equipment.

Hereinafter, the filtered water discharging portion of the present invention will be described in detail with reference to embodiments. The filtered water discharging portion has a structure for recovering the filtered water processed through the separating membrane module 700 to the outside and includes a flexible pipe in common so that the filtered water discharging portion It is not damaged and the filtrate can be easily recovered.

[First Embodiment]

First, the filtered water discharge unit 900 according to the first embodiment will be described with reference to FIG. This embodiment is based on that applied to the arrangement structure of the membrane support frame and the membrane module according to the first embodiment shown in FIG.

The filtered water discharge unit 900 may include a water collecting pipe 920, a first collecting pipe 940 and a second collecting pipe 960.

23, when a plurality of separation membrane modules 700 are disposed inside the membrane support frame 600, sewage (or wastewater) is discharged from the outside through the hollow fiber membrane 730 of each separation membrane module, And is collected in the collecting part 711 of the upper frame.

One or more discharge holes 714 are formed on the upper frame 710 and the water collecting pipe 920 is communicated with the collecting part 711 of each separator module through the discharge hole 714 As shown in FIG. That is, the water collecting pipe 920 is installed across the plurality of the separator module 700 and communicates with the water collecting part 711, so that the filtered water collected in each water collecting part 711 is supplied to one water collecting pipe (920).

The water collecting pipe 920 is communicated with the water collecting part 711 through one discharge hole 714 formed at the center of each upper frame 710 and the water collecting pipe 920 is connected with the membrane supporting frame 600 A plurality of discharge holes may be formed on the upper side along the length of the upper frame 710 and a plurality of collecting pipes 920 may be installed.

One or more first recovery pipes 940 may be coupled to the water collection pipe 920 to recover the filtered water collected in the water collection pipe 920. In this embodiment, And two first recovery pipes 940 are coupled to both ends. The first recovery pipe 940 is made of a rigid pipe, and may be any shape such as an S shape or a straight shape.

Next, a second recovery pipe 960 is connected to the first recovery pipe 940, respectively, and the second recovery pipe 960 is a flexible pipe. Accordingly, despite the reciprocating motion of the separation membrane module 700, the filtered water discharge portion 900 is not broken and the filtered water can be easily recovered.

A suction pump (not shown) for sucking the inflow water from the outside of the hollow fiber membrane 730 to the inside can be connected to the second recovery pipe 960, and the suction pipe The recovered filtered water can be stored in a separate tank (not shown).

That is, the filtered water that has flowed into the hollow fiber membrane 730 of the separation membrane module from the outside to the inside thereof is collected in the collecting part 711 of the upper frame 710 and the collected water collected in the collecting part 711 Collected in one water collecting pipe 920 and recovered to the outside via the first recovery pipe 940 and the second recovery pipe 960.

In this embodiment, the rigid first return pipe connected to the water collecting pipe and the flexible second return pipe are separately formed, but a flexible pipe may be directly connected to the water collecting pipe.

[Second Embodiment]

Next, the filtered water discharge unit 1900 according to the second embodiment will be described with reference to FIG. This embodiment is based on that applied to the arrangement structure of the membrane support frame and the membrane module according to the second embodiment shown in Fig.

The filtered water discharge portion 1900 may include a first recovery pipe 1940 and a second recovery pipe 1960.

24, the membrane support frame 600 includes a filtration pipe 640 formed at an upper center portion of the membrane support frame 600, and a plurality of separation membrane modules 700 are coupled to both sides of the filtration pipe 640 . At this time, the upper frame 710 of each of the separation membrane modules is inserted and coupled to the coupling hole 642 formed in the filtration pipe 640, so that the filtered water collected in each of the collection portions 711 is connected to one filtration pipe (640).

At least one first recovery pipe 1940 may be coupled to the filtration pipe 640 in order to recover the filtrate collected in the filtration pipe 640. In this embodiment, And two first recovery pipes 1940 are coupled to both ends in the longitudinal direction. The first recovery pipe 1940 is made of a rigid pipe, and may have any shape such as an S shape or a straight shape.

Next, a second recovery pipe 1960 is connected to the first recovery pipe 1940, and the second recovery pipe 1960 is a flexible pipe. Accordingly, despite the reciprocating movement of the separation membrane module 700, the filtered water discharge portion 1900 is not damaged and the filtered water can be easily recovered.

A suction pump (not shown) may be connected to the second recovery pipe 1960 as in the first embodiment, and the filtered water recovered through the second recovery pipe 1960 by a suction force may be connected to a separate tank (not shown) Lt; / RTI >

That is, the filtered water that has flowed into the hollow fiber membrane 730 of the separation membrane module from the outside to the inside thereof is collected in the collecting part 711 of the upper frame 710 and the collected water collected in the collecting part 711 And is collected into one filtration pipe 640 and recovered to the outside via the first recovery pipe 1940 and the second recovery pipe 1960.

In this embodiment, the rigid first return pipe connected to the filtration pipe and the flexible second return pipe are separately formed, but a flexible pipe may be directly connected to the filtration pipe.

Next, referring to FIGS. 30 to 33, a structure in which a plurality of membrane supporting frames 600 are installed inside the treatment tank 300 according to each embodiment will be described.

In the treatment tank 300, a plurality of membrane supporting frames 600 are generally disposed in accordance with filtration capacity of sewage (or wastewater). At this time, the plurality of membrane support frames 600 may be arranged long in a row or may be divided into a plurality of columns according to a site area or the like.

In the following, each embodiment will be described based on the provision of ten membrane support frames 600 inside the treatment tank 300.

[First Embodiment]

According to the first embodiment, ten membrane support frames 600 are arranged in a row in the treatment tank 300, and are connected to one reciprocating means 200 to reciprocate integrally.

This can be applied when the site where the treatment tank 300 is installed is long but the width is not sufficient.

As described above, the reciprocating unit 200 may include a reciprocating frame 250 and a driving unit 205, and is connected to the membrane supporting frame 600 to reciprocate the membrane supporting frame .

The reciprocating frame 250 is connected to the membrane supporting frame 600 to support the membrane supporting frame 600. The driving unit 205 is disposed in the processing bath 300, And may be connected to one side of the frame 250 to move the reciprocating frame 250.

Since the ten membrane support frames 600 are connected to one reciprocating means 200 in the present embodiment, the ten membrane support frames 600 are arranged in a row in one reciprocating frame 250. At this time, the ten membrane support frames 600 may be all connected to one another in a single row, but the reciprocating frame 250 may be installed as shown in FIG. 30, The membrane support frame 600 may be formed in each of the chambers so that the membrane support frame 600 is formed to have a number of chambers equal to the number of the membrane support frames 600 to be formed. Accordingly, when the membrane support frame 600 is damaged or a problem occurs, the membrane support frame 600 can be individually replaced, and installation is simpler.

According to the present embodiment, a large driving force is required since a plurality of membrane supporting frames 600 should be reciprocated by one reciprocating means 200.

[Second Embodiment]

According to the second embodiment, ten membrane support frames 600 are arranged in a row in the treatment tank 300, and are divided into five on both sides and connected to the reciprocating means 200, respectively. Accordingly, the set of membrane support frames 600, which are divided into five on each side, can be reciprocated separately. That is, the sets of membrane support frames 600 on both sides may reciprocate in the same direction, but may reciprocate in different directions.

Similar to the first embodiment, this can be applied when the site where the treatment tank 300 is installed is long but the width is not sufficient.

Specifically, in the present embodiment, the ten membrane support frames 600 are divided into two sets on both sides and connected to one of the reciprocating means 200, And are arranged in a line within each of the two reciprocating frames 250, each of which is composed of five membrane supporting frames 600.

In this case, the five membrane support frames 600 may be all connected to one another in a single row, but the reciprocating frame 250, as shown in FIG. 31, The membrane support frame 600 may be formed in each of the chambers so that the membrane support frame 600 is formed to have five chambers in the present embodiment. Accordingly, when the membrane support frame 600 is damaged or a problem occurs, the membrane support frame 600 can be individually replaced, and installation is simpler.

In this embodiment, as in the first embodiment, the ten membrane support frames are not reciprocated integrally by one reciprocating means, but are separated by the five membrane support frames 600 and connected to the reciprocating means 200 It is not necessary to apply a large driving force, and each set is reciprocated in the opposite direction at intervals between the sets of five membrane support frames 600, thereby generating a swirling effect, thereby obtaining a sludge lifting effect.

[Third Embodiment]

According to the third embodiment, five membrane support frames 600 are arranged in two rows in the treatment tank 300, and are connected to one reciprocating means 200 to reciprocate integrally.

This can be applied when the site where the treatment tank 300 is installed is wide but the length is not sufficient.

Specifically, in the present embodiment, the ten membrane support frames 600 are connected to one reciprocating means 200, so that the ten membrane support frames 600 are arranged in two rows in one reciprocating frame 250 Are arranged side by side.

At this time, the ten membrane support frames 600 may be connected to each other in five rows in two rows in the reciprocating frame 250 having one frame. However, as shown in FIG. 32, The membrane supporting frame 600 is formed to have a number of chambers corresponding to the number of the membrane supporting frames 600 to be installed, that is, five chambers divided into two rows in the present embodiment, As shown in FIG. Accordingly, when the membrane support frame 600 is damaged or a problem occurs, the membrane support frame 600 can be individually replaced, and installation is simpler.

According to the present embodiment, a large driving force is required since a plurality of membrane supporting frames 600 should be reciprocated by one reciprocating means 200.

[Fourth Embodiment]

According to the fourth embodiment, ten film support frames 600 are arranged in two rows by five in the treatment tank 300, and each column is connected to a separate reciprocating means 200. Thus, the set of membrane support frames 600 in each row can be reciprocated separately. That is, the sets of membrane support frames 600 in each row may reciprocate in the same direction, but may reciprocate in different directions.

Similar to the third embodiment, the site where the treatment tank 300 is installed can be applied when the width is wide but the length is not sufficient.

Specifically, in the present embodiment, the ten membrane support frames 600 are divided into two rows and connected to one of the reciprocating means 200, so that the reciprocating means 200 is arranged on one side of the treatment tank 300 And five membrane supporting frames 600 are arranged in a line within each one of the reciprocating frames 250.

In this case, the five membrane support frames 600 may be all connected to one another in a single row, but the reciprocating frame 250 may be installed in a single row, The membrane support frame 600 may be formed in each of the chambers so that the membrane support frame 600 is formed to have five chambers in the present embodiment. Accordingly, when the membrane support frame 600 is damaged or a problem occurs, the membrane support frame 600 can be individually replaced, and installation is simpler.

In this embodiment, as in the third embodiment, the ten membrane support frames are not integrally reciprocated by one reciprocating means, but the five membrane support frames 600 are separated into the respective columns, It is not necessary to apply a large driving force and the sludge lifting effect can be obtained by generating swirls by reciprocating each set in opposite directions at intervals between sets of membrane support frames 600 in each row.

Further, as each row reciprocates in different directions, vibration due to the reciprocating motion can be canceled, and the vibration generated in the treatment tank 300 is reduced and stable.

Hereinafter, a control unit 1000 of the present invention and a control method of the membrane filtration system according to the present invention will be described.

The membrane filtration system of the present invention may further include a control unit 1000 for controlling the reciprocating motion distance or frequency of the separation membrane module 700.

The control unit 1000 controls the distance or frequency of reciprocation of the separation membrane in the separation membrane module 700 according to the operation conditions and the degree of pollution of the separation membrane module 700. In the present embodiment, And an adjustment control unit 1400 for controlling the reciprocating motion distance or frequency of the separation membrane module 700 according to the degree of contamination measured by the contamination measurement unit 1200, Lt; / RTI >

The contamination measuring unit 1200 can measure the contamination degree of the separation membrane module 700 by measuring a pressure differential TMP between the separation membranes. In the membrane filtration system according to the present invention, the contamination degree of the separation membrane module 700 will be measured during the initial operation or after the bachwash operation, and after the filtration has been performed for a considerable time, 700) will be measured highly.

Accordingly, as the degree of contamination of the separation membrane module 700 increases, the regulation control unit 1400 increases the frequency of the separation membrane module 700 and decreases the degree of contamination of the separation membrane module 700, Can be reduced. That is, as the degree of contamination increases, the reciprocating cycle of the separator module 700 may be reduced and the reciprocating cycle of the separator module 700 may be increased as the degree of contamination is lowered.

When the frequency of the separation membrane module 700 is increased, the separation membrane is reciprocated at a higher speed and the inertia imparted to the separation membrane becomes larger, so that the contaminants attached to the separation membrane can be separated and removed.

However, since the energy consumption is increased by increasing the frequency, it is possible to effectively remove the fouling of the separation membrane due to the reciprocating movement while appropriately controlling the degree of contamination of the separation membrane module 700, .

At this time, the separation membrane module 700 reciprocates with the membrane support frame 600 on which the separation membrane module 700 is installed and the reciprocating frame 250 supporting the membrane support frame 600, The separation membrane module 700 is also adjustable by adjusting the reciprocating distance and the frequency (cycle) of the separation membrane module.

Accordingly, the adjustment control unit 1400 may control the speed of the motor 210 connected to the reciprocating unit 200 to transmit the power.

In this embodiment, the separation membrane module 700 can be set to reciprocate at 0.5 Hz and can be adjusted to 1 Hz according to the contamination degree of the separation membrane. However, if the frequency exceeds 1 Hz, the energy consumption is increased and the structure of the membrane filtration system may be damaged.

The controller 1400 increases the reciprocating distance of the separator module 700 as the degree of contamination of the separator module 700 increases and decreases the degree of contamination of the separator module 700, ) Can be reduced.

That is, if the reciprocating motion distance of the separation membrane module 700 is increased when the frequency is kept the same, the reciprocating motion of the separation membrane is accelerated and the effect similar to that of increasing the frequency is exhibited. If the frequency is increased too much, Can increase the reciprocating distance because of the risk of damaging the structure of the system.

If the reciprocating motion distance of the separation membrane module 700 is increased, the separation membrane is reciprocated at a higher speed and the inertia imparted to the separation membrane becomes larger, so that contaminants attached to the separation membrane can be separated and removed.

Since the separation membrane module 700 reciprocally moves together with the membrane support frame 600 and the reciprocating frame 250, the reciprocating distance of the reciprocating frame 250 is adjusted, Is also adjustable. Accordingly, the adjustment control unit 1400 may be connected to the reciprocating unit 200 to control the reciprocating distance of the reciprocating frame 250.

Specifically, as described above, the driving unit 205 includes a motor 210, a first pulley 211, a second pulley 213, a rotor 230, and a link rod 220, The motor 210 and the rotor 230 are rotatably connected through the first pulley 211 and the second pulley 213. The link rod 220 is rotatably connected to the rotor 230 and the reciprocating frame 250 To convert the rotary motion into the reciprocating motion.

The rotor 230 is provided with a plurality of connection ports 233 connected to the link rod 220 so that the connection rod 233 connecting the link rod 220 to the rotor is different, ) Can be adjusted.

That is, when the reciprocating motion distance of the separation membrane module 700 is increased as the degree of contamination of the separation membrane module 700 increases, the adjustment control unit 1400 controls the rotation speed of the separation membrane module 700, The reciprocating distance of the reciprocating frame 250 can be increased by connecting the link rod 220 to the connecting port 233b.

In contrast, if the reciprocating motion distance of the separation membrane module 700 is to be reduced as the contamination degree of the separation membrane module 700 is lowered, the regulation control unit 1400 controls the rotation of the separation membrane module 700, The reciprocating distance of the reciprocating frame 250 can be reduced by connecting the link rod 220 to the link 233a.

The link rod 220 includes a link body 221, a first link hole 223 disposed at one side of the link body 221 and coupled to a connection port 233 of the rotor, And a second link hole 225 which is disposed on the other side of the link body 221 and is coupled to the reciprocating frame 250. The first link hole 223 is formed by machining a plurality of .

Accordingly, the reciprocating distance of the reciprocating frame 250 can be controlled by varying the position of the first link hole 223 of the link rod connected to the rotor connection port 233.

That is, when the reciprocating motion distance of the separation membrane module 700 is to be increased as the contamination degree of the separation membrane module 700 increases, the regulation control unit 1400 controls the second link holes The reciprocating distance of the reciprocating frame 250 can be increased by fastening the connecting port 233 of the rotor to the first link hole 223b relatively far from the reciprocating frame 250.

In contrast, when the reciprocating motion distance of the separation membrane module 700 is to be reduced as the contamination degree of the separation membrane module 700 is lowered, the regulation control unit 1400 controls the second link holes The reciprocating distance of the reciprocating frame 250 can be reduced by fastening the connecting port 233 of the rotor to the first link hole 223a which is relatively close to the first link hole 225.

In addition, according to the embodiment, the adjustment control unit 1400 can control the frequency of the backwash of the separation membrane module 700 to be high. In the present embodiment, the frequency of backwashing of the separation membrane module 700 can be adjusted to be as high as 0.7 Hz, thereby improving the cleaning efficiency.

The foregoing only shows specific embodiments of the membrane filtration system.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. And such variations are within the scope of protection of the present invention.

100: membrane filtration system
200: reciprocating means 205:
210: motor 211: first pulley
212: power transmission belt 213: second pulley
220: link rod 221: link body
223: first link hole 225: second link hole
230: rotor 233: connector
250: reciprocating frame
300: Treatment tank 310: Inlet port
320: Outlet
400: sludge lifting portion
410: Vane member 411: Vane body
413: Floating wing 420: Sludge floatation means
421: first vane body 425: first sealing pad
430: lift unit 431: hydraulic cylinder
433: lifting rod 441: second vane body
450: elastic body 455: second sealing pad
460: buffer pad 470: third vane body
480: Floating wings
500: Sliding means
[First Embodiment]
511: Guide rail 512: Stopper
513: Wheel block 514: Cloud wheel
514a: center wheel portion 514b:
514c: Support wheel part 515: Rolling member
[Second Embodiment]
521: guide rail 522: stopper
523: wheel support 524: tapered wheel
524a: rotating shaft 525: rolling member
[Third Embodiment]
531: Linear guide 532: Stopper
533: moving beam 534: ball bearing
[Fourth Embodiment]
551: guide rail 552: first protrusion
561: Wheel block 571: Cloud wheel
572: second protrusion 580: support unit
581: first body part 582: first support wheel
583: second body part 584: second support wheel
600: membrane support frame 620:
640: Filtration piping 642: Coupling hole
700: separator module 710: upper frame
711: collecting part 720: lower frame
712, 722: space maintaining portion 714: discharge hole
730: hollow fiber membrane
[First Embodiment]
740: Length adjuster 742: Hydraulic cylinder
744: Calculator 746:
[Second Embodiment]
1740: length adjuster 1742: shaft
1744: Cam 1746: Motor
810: interval measuring unit 811: first interval measuring sensor
813: second interval measuring sensor 820: first interval adjusting unit
820a: mobile unit 821: regulating cylinder
822: Moving block 823: Moving wheel
825: moving rail 826: first driving part
827: First oil pressure calculation unit 828: First interval calculation unit
829: first proximity sensor 850: second interval adjusting unit
851: second proximity sensor 852: second interval calculating section
853: Second hydraulic pressure calculating section 854: Second driving section
860:
[First Embodiment]
900: filtered water discharge part 920: water collecting pipe
940: First recovery pipe 960: Second recovery pipe
[Second Embodiment]
1900: Filtration water discharge part 1940: First recovery pipe
1960: Second collection pipe
1000: control unit 1200: pollution measuring unit
1400:

Claims (10)

Treatment tank;
A membrane support frame disposed in the treatment tank and on which a filtration membrane is mounted; And
A vane member disposed at a lower end of the membrane support frame and provided to float sludge accumulated at a lower portion of the treatment tank;
And a membrane filtration system.
The method according to claim 1,
The vane member
A vane body disposed at a lower end of the membrane support frame; And
A floating blade connected to the lower end of the vane body at an angle so as to float the sludge between reciprocating movements of the membrane support frame;
Wherein the membrane filtration system comprises a membrane filtration system.
Treatment tank;
A membrane support frame disposed in the treatment tank and on which a filtration membrane is mounted; And
A sludge floatation means disposed at the lower end of the membrane support frame so as to be stretchable so as to float the sludge accumulated in the lower portion of the treatment tank;
And a membrane filtration system.
The method of claim 3,
The sludge lifting means comprises:
A first vane body disposed at a lower end of the membrane support frame;
A second vane body connected to a lower end of the first vane body; And
An elevating unit arranged to be interlocked between the first vane body and the second vane body, the elevating unit elevating the second vane body;
The membrane filtration system comprising:
5. The method of claim 4,
The elevating unit includes:
A hydraulic cylinder disposed in the first vane body; And
A lifting rod disposed in the second vane body and connected to a rod of the hydraulic cylinder;
Wherein the membrane filtration system comprises a membrane filtration system.
6. The method of claim 5,
Wherein the sludge lifting means further comprises a third vane body connected to a lower end of the second vane body.
The method according to claim 6,
Wherein the sludge lifting means further comprises a float blade connected to a lower end of the third vane body such that sludge is floated between reciprocating motions of the membrane support frame.
8. The method of claim 7,
Wherein the floating vane is disposed at an angle with the third vane body.
9. The method of claim 8,
The sludge lifting means comprises:
Further comprising: an elastic body disposed between the second vane body and the third vane body to mitigate the impact applied by the floating wings to the bottom of the treatment vessel upon impact.
10. The method of claim 9,
The sludge lifting means comprises:
Further comprising a cushioning pad disposed at an end of the flotation wing to relieve the impact applied by the flotation wing upon impact to the bottom of the treatment bath.

Images