Disk filter for filtering liquid, method for manufacturing same, and disk filter device including same

Abstract

This disk filter comprises: a disk plate having a disk shape and having a plurality of projections arranged in a filtering region between an inner circular circumference and an outer circular circumference so as to be spaced apart from each other along the outer circular circumference in a sawtooth form; and fiber filtering media wound around the projections of the disk plate. The fiber filter media of an nth (n is a natural number) turn passes over the upper surfaces of the protrusions in a first group and passes under the lower surfaces of the protrusions in a second group through spaces between adjacent protrusions, and the filtering media of an (n +1)th turn passes over the upper surfaces of the protrusions in the second group and passes under the lower surfaces of the protrusions in the first group through spaces between adjacent protrusions.

Description

Disc filter for liquid filtration, method for manufacturing the same, and disc filter device including the same

[0001] The present invention relates to a disc filter for liquid filtration, a method for manufacturing the same, and a disc filter device including the same, and more particularly, to a disc filter for liquid filtration with improved filtration performance, a method for manufacturing the same, and a disc filter device including the same.

[0002] As the discharge water quality standards of water treatment facilities are becoming increasingly stricter, various types of wastewater filtration devices are being introduced to water purification plants or wastewater treatment plants to treat wastewater safely and environmentally. Among the various methods, disk-type filtration devices that utilize fiber filters and have high wastewater filtration efficiency are mainly used.

[0003] Typically, a disk filter device includes a plurality of disk filters, each of which has a disk shape with an open center.

[0004] A disc filter device filters inflow water through a plurality of disc filters through a filtration process and discharges filtered water. Over time, the disc filter device accumulates waste and impurities on the plurality of disc filters, which increases the pressure of the filter. When liquid enters the disc filter at a constant pressure, the pressure of the discharged filtered water may decrease. To solve this problem, the disc filter device performs a backwashing process. The backwashing process expands the gaps between the plurality of disc filters and supplies backwashing water to the expanded plurality of disc filters to clean the disc filters.

[0005] In this way, the above disk filter device can operate in a filtration process and a backwash process.

[0006] An object of the present invention is to provide a disc filter for liquid filtration to improve filtration performance.

[0007] An object of the present invention is to provide a method for manufacturing the above disk filter.

[0008] An object of the present invention is to provide a disk filter device including the above disk filter.

[0009] In order to achieve the above object, a disk filter according to an exemplary embodiment of the present invention comprises a disk plate having a disk shape and having a plurality of protrusions spaced apart from each other in a sawtooth shape along the outer circumference of the disk plate in a filter area between the inner circumference and the outer circumference, and a fiber filter material wound around the protrusions of the disk plate.

[0010] In one embodiment, the fiber media comprises a single or multiple fibers, and the fiber media is wound around the protrusions while alternately passing over the upper surfaces of adjacent protrusions and the lower surfaces facing the upper surfaces.

[0011] In one embodiment, the nth (n is a natural number) turn of the fiber media is wound around the protrusions in such a way that it passes over the upper surface of the protrusion of the first group through a space between adjacent protrusions and the lower surface of the protrusion of the second group, and the (n+1)th turn of the fiber media is wound around the protrusions in such a way that, in contrast to the nth turn, it passes over the upper surface of the protrusion of the second group through a space between adjacent protrusions and the lower surface of the protrusion of the first group.

[0012] In one embodiment, each end of the protrusions corresponding to the outer circumference of the disk plate has a curved portion.

[0013] In one embodiment, each end of the protrusions corresponding to the outer circumference of the disk plate has a protrusion that protrudes in a hook shape toward the space between the protrusions.

[0014] In order to achieve the above object, a method for manufacturing a disk filter according to an exemplary embodiment of the present invention includes the steps of forming a disk plate having a disk shape and having a plurality of protrusions arranged in a sawtooth shape spaced apart from each other along the outer circumference of the filter area between the inner circumference and the outer circumference, and the step of winding a fiber filter material around the protrusions of the disk plate.

[0015] In one embodiment, the fiber media comprises a single or multiple fibers, and further comprises a step of winding the fiber media around the protrusions while alternately passing over the upper surfaces of the adjacent protrusions and the lower surfaces facing the upper surfaces.

[0016] In one embodiment, the nth (n is a natural number) turn of the fiber filter material further includes a step of winding the fiber filter material past the upper surface of the first group of protrusions through a space between adjacent protrusions and past the lower surface of the second group of protrusions, and a step of winding the fiber filter material (n+1) opposite to the nth turn of the fiber filter material past the upper surface of the second group of protrusions through a space between adjacent protrusions and past the lower surface of the first group of protrusions.

[0017] In order to achieve the above object, a disk filter device according to an exemplary embodiment of the present invention includes a disk plate having a disk shape, a plurality of protrusions arranged in a sawtooth shape and spaced apart from each other along an outer circumference in a filter area between an inner circumference and an outer circumference, and a disk filter including a fiber filter material wound around the protrusions of the disk plate, and a disk filter including a fiber filter material wound around the protrusions of the disk plate, and a gap adjusting unit disposed on an uppermost layer of a plurality of stacked disk filters and adjusting the gap between the plurality of disk filters to a first gap during a filtration mode and to a second gap wider than the first gap during a backwash mode, wherein during the filtration mode, inflow water is filtered through the plurality of disk filters, and during the backwash mode, backwash inflow water washes waste accumulated on the plurality of disk filters.

[0018] In one embodiment, the fiber media comprises a single or multiple fibers, and the fiber media is wound around the protrusions while alternately passing over the upper surfaces of adjacent protrusions and the lower surfaces facing the upper surfaces.

[0019] In one embodiment, the nth (n is a natural number) turn of fiber media wound around the disk filter passes over the upper surface of the first group of protrusions through a space between adjacent protrusions and passes over the lower surface of the second group of protrusions, and the (n+1)th turn of fiber media is wound around the protrusions in a manner opposite to the nth turn, passing over the upper surface of the second group of protrusions through a space between adjacent protrusions and passes over the lower surface of the first group of protrusions.

[0020] According to the embodiments of the present invention as described above, the disk filter has a structure in which a fiber media made of a single or multiple fiber threads is wound multiple times around a plurality of sawtooth-shaped protrusions, thereby increasing the overall filtration volume of the disk filter, and also improving the filtration performance by forming pores of various sizes.

[0021] Additionally, if the filtration volume of the above-mentioned disk filter increases, the usage time (filtration time) of the above-mentioned disk filter can be increased.

[0022] In addition, according to one embodiment, the fiber filter material can be easily washed using a pH-adjusted chemical or neutral detergent after being used for a long period of time, so that it can be reused.

[0023] FIG. 1 is a plan view of a disk filter according to one embodiment of the present invention.

[0024] Figure 2 is a conceptual diagram for explaining the disk filter of Figure 1.

[0025] FIGS. 3A and 3B are drawings for explaining various shapes of a disk plate of a disk filter according to one embodiment of the present invention.

[0026] FIG. 4 is a drawing for explaining a method for manufacturing a disk filter according to one embodiment of the present invention.

[0027] FIGS. 5A and 5B are drawings for explaining a disk filter device of a spring compression type according to one embodiment of the present invention.

[0028] FIGS. 6A and 6B are drawings for explaining a piston compression type disk filter device according to one embodiment of the present invention.

[0029] The present invention is susceptible to various modifications and takes various forms. Specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention. Throughout the description of each drawing, similar reference numerals have been used to designate similar components. In the accompanying drawings, the dimensions of structures may be exaggerated to enhance clarity of the present invention.

[0030] While terms like "first" and "second" may be used to describe various components, these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, a first component could be referred to as a "second component," and similarly, a second component could also be referred to as a "first component."

[0031] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprise" or "have" are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. In addition, the meaning of A and B being "connected" or "coupled" includes a case where, in addition to A and B being directly connected or coupled, another component C is included between A and B so that A and B are connected or coupled.

[0032] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be construed in an idealized or overly formal sense unless explicitly defined herein. Furthermore, in the claims for method inventions, the order of the steps may be interchanged, unless the order of the steps is explicitly stated.

[0033]

[0034] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in more detail.

[0035] Fig. 1 is a plan view of a disk filter according to one embodiment of the present invention. Fig. 2 is a conceptual diagram for explaining the disk filter of Fig. 1.

[0036] Referring to FIGS. 1 and 2, the disk filter (100) may include a disk plate (110) and a fabric filter (130) wound around the disk plate.

[0037] The above disk plate (110) has a circular shape, a disk shape with a hole formed in the center area, and can be formed of a plastic material.

[0038] The above disk plate (110) has a filter area whose width (W) is defined by the distance between the inner and outer circumferences. In the filter area, a plurality of protrusions (110a, 110b) are arranged in a sawtooth shape and spaced apart from each other along the outer circumference.

[0039] According to one embodiment, the ends of the plurality of protrusions (110a, 110b) corresponding to the outer circumference of the circle may have a straight shape along the outer circumference of the circle.

[0040] The above fiber material (130) may include a single fiber, a fiber made up of several fibers overlapping each other with a size of less than a few micrometers, a fiber made up of multiple fibers twisted together (braided), or a fiber having a volume such as yarn.

[0041] The above fiber filter (130) is wound around the disk plate (110) a set number of times along the circumference to form a disk filter with a certain thickness. The above fiber filter (130) is wound around the protrusions (110a, 110b) while alternately passing over the upper surface of the adjacent protrusions (110a, 110b) from the inside to the outside of the disk plate (110) and the lower surface facing the upper surface.

[0042] For example, the fiber media (130) wound around the disk plate (110) in the nth (n is a natural number) turn passes through the upper surface of the first group of protrusions, for example, the odd-numbered protrusions (110a), and passes through the space between the protrusions and the adjacent protrusions to pass through the lower surface of the second group of protrusions, for example, the even-numbered protrusions (110b).

[0043] Next, the fiber media (130) wound on the disk plate (110) in the (n+1)th turn is wound on the projections of the disk plate (110) in a manner opposite to the nth turn, passing over the upper surface of the projections of the second group, for example, the even-numbered projections (110b), and passing over the lower surface of the projections of the first group, for example, the odd-numbered projections (110a), through a space between the projections and the adjacent projections.

[0044] In this way, the fiber filter (130) can be wound around the disk plate (110) a set number of times in a manner that alternately passes over the upper and lower surfaces of the plurality of protrusions (110a, 110b), thereby manufacturing a disk filter having a set thickness.

[0045] According to one embodiment, the disk filter has a structure in which a fiber media composed of a single or multiple fiber threads is wound multiple times around a plurality of sawtooth-shaped protrusions, thereby increasing the overall filtration volume of the disk filter and also improving filtration performance by forming pores of various sizes.

[0046] Additionally, if the filtration volume of the above-mentioned disk filter increases, the usage time (filtration time) of the above-mentioned disk filter can be increased.

[0047] In addition, according to one embodiment, the fiber filter material can be easily washed using a pH-adjusted chemical or neutral detergent after being used for a long period of time, so that it can be reused.

[0048]

[0049] FIGS. 3A and 3B are drawings for explaining various shapes of a disk plate of a disk filter according to one embodiment of the present invention.

[0050] Referring to FIG. 3a, a plurality of protrusions (150a) are arranged in a sawtooth shape and spaced apart from each other along the outer circumference of a filter region between an inner circumference and an outer circumference of a disk plate (150) according to one embodiment. Each end of the protrusions (150a) corresponding to the outer circumference of the disk plate may have a curved portion bent in one direction.

[0051] Referring to FIG. 3b, a plurality of protrusions (170a) are arranged in a sawtooth shape and spaced apart from each other along the outer circumference of the filter area between the inner circumference and the outer circumference of the disk plate (170) according to one embodiment. Each end of the protrusions (170a) corresponding to the outer circumference of the disk plate may have a curved portion bent in one direction and a protrusion protruding in a hook shape at the end of the curved portion. The protrusions may protrude toward the space between the protrusions.

[0052] The shapes of the plurality of protrusions described above are not limited thereto and can be formed in various ways.

[0053]

[0054] FIG. 4 is a drawing for explaining a method for manufacturing a disk filter according to one embodiment of the present invention.

[0055] Referring to Fig. 4, a disk plate (110) is formed in which a plurality of protrusions are arranged in a sawtooth shape.

[0056] The above disk plate (110) has a plurality of protrusions (110a, 110b) arranged in a sawtooth shape spaced apart from each other in the filter area between the inner and outer circular peripheries.

[0057] The above fiber filter (130) is wound around the protrusions (110a, 110b) while alternately passing over the upper surface and the lower surface facing the upper surface of the adjacent protrusions (110a, 110b) from the inside to the outside of the disk plate (110).

[0058] For example, as in step (a) of FIG. 4, the nth (n is a natural number) round of fiber media (130) is wound around the disk plate (110) along the circumferential direction of the disk plate (110) in such a manner that it passes through the upper surface of the first group of protrusions, for example, the first protrusion (111), passes through the space between the second protrusion (112) and the adjacent second protrusion (112), passes through the lower surface of the second protrusion (112), passes through the space between the third protrusion (113) and the upper surface of the third protrusion (113), passes through the space between the third protrusion (114) and the adjacent fourth protrusion (114), passes through the lower surface of the fourth protrusion (114).

[0059] Next, as in step (b) of FIG. 4, the (n+1)th turn of the fiber media (130) is wound around the disk plate (110) along the circumferential direction of the disk plate (110) in the opposite manner to the nth turn, passing through the lower surface of the first group of protrusions, for example, the first protrusion (111), passing through the space between the first protrusion (111) and the upper surface of the second protrusion (112), and again, passing through the space between the third protrusion (113) and the lower surface of the third protrusion (113), and passing through the space between the fourth protrusion (114) and the upper surface of the fourth protrusion (114).

[0060] Repeat steps (a) and (b) above.

[0061] As a result, as in step (c) of Fig. 4, the fiber filter (130) can be wound around the protrusions (111, 112, 113, 114, etc.) a set number of times from the inside to the outside of the disk plate (110) to manufacture a disk filter (100) of a desired thickness.

[0062]

[0063] FIGS. 5A and 5B are drawings for explaining a disk filter device of a spring compression type according to one embodiment of the present invention.

[0064] Referring to FIGS. 5a and 5b, the spring compression type disk filter device may include a disk filter (100), a spring gap adjustment part (200), and a housing part (500).

[0065] The above disk filter (100) is the disk filter (100) described in FIGS. 1 to 4, and includes a disk plate (110) having a plurality of sawtooth-shaped protrusions arranged around an outer circle, and a fiber media (130) wound around the plurality of protrusions (110a, 110b) while alternately passing over the upper surface of adjacent protrusions (110a, 110b) of the disk plate (110) and the lower surface facing the upper surface. The disk filter (100) has a structure in which a plurality of protrusions are laminated.

[0066] The spring spacing adjustment unit (200) is positioned adjacent to the uppermost layer of the plurality of disk filters (100), and can adjust the spacing of the plurality of disk filters (100) in a spring compression manner.

[0067] For example, when the disk filter device operates in a filtration mode, the spacing between the plurality of disk filters is adjusted to a first spacing, and when the disk filter device operates in a reverse-wash mode, the spacing between the plurality of disk filters is adjusted to a second spacing that is wider than the first spacing.

[0068] The housing part (500) accommodates the plurality of disk filters (100) and the spring gap adjustment part (200), and a first inlet (510) and a second inlet (520) for liquid inflow and discharge are formed.

[0069] The first entrance (510) may be arranged on the first side, and the second entrance (520) may be formed on the second side facing the first side.

[0070] Referring to Fig. 5a, when the disk filter device operates in filtration mode, the spring gap adjustment unit (200) expands the spring to apply a certain pressure to the plurality of disk filters (100). Accordingly, the gap between the plurality of disk filters (100) is adjusted to a first gap.

[0071] When the spacing between the plurality of disk filters (100) is adjusted to the first spacing, inflow water is supplied to the first inlet (510). Impurities are filtered through the process of the inflow water flowing from the outside to the inside of the plurality of disk filters (100) having the first spacing, or flowing from the inside to the outside.

[0072] The filtered water filtered by the above plurality of disk filters (100) is discharged through the second inlet (520).

[0073] Referring to FIG. 5b, when the disk filter device is used for a long period of time, the disk filter device may operate in a reverse-wash mode.

[0074] When the above disk filter device operates in reverse mode, the spring spacing adjustment unit (200) compresses the spring to release the pressure applied to the plurality of disk filters (100). Accordingly, the spacing between the plurality of disk filters (100) is adjusted to a second spacing that is wider than the first spacing.

[0075] When the spacing of the plurality of disk filters (100) is adjusted to the second spacing, the liquid flow direction can be controlled in the opposite direction to the filtration mode and the flow rate can be set to at least twice or more.

[0076] Accordingly, the reverse-washing inflow water is supplied to the second entrance (520). The reverse-washing inflow water is washed away by the process of flowing from the outside to the inside of the plurality of disk filters (100) widened by the second interval, or from the inside to the outside.

[0077] The reverse-washing discharge water that washes the above plurality of disk filters (100) is discharged through the first inlet (510).

[0078]

[0079] FIGS. 6A and 6B are drawings for explaining a piston compression type disk filter device according to one embodiment of the present invention.

[0080] Referring to FIGS. 6a and 6b, the piston compression type disk filter device may include a disk filter (100), a piston gap adjustment unit (300), and a housing unit (500).

[0081] The above disk filter (100) is the disk filter (100) described in FIGS. 1 to 4, and includes a disk plate (110) having a plurality of sawtooth-shaped protrusions arranged around an outer circle, and a fiber media (130) wound around the plurality of protrusions (110a, 110b) while alternately passing over the upper surface of adjacent protrusions (110a, 110b) of the disk plate (110) and the lower surface facing the upper surface. The disk filter (100) has a structure in which a plurality of protrusions are laminated.

[0082] The piston gap adjustment unit (300) is arranged adjacent to the uppermost layer of the plurality of disk filters (100), and can adjust the gap of the plurality of disk filters (100) in a piston compression manner.

[0083] For example, when the disk filter device operates in a filtration mode, the spacing between the plurality of disk filters is adjusted to a first spacing, and when the disk filter device operates in a reverse-wash mode, the spacing between the plurality of disk filters is adjusted to a second spacing that is wider than the first spacing.

[0084] The housing part (500) accommodates the plurality of disk filters (100) and the gap adjusting part (200), and a first inlet (510) and a second inlet (520) for liquid inflow and discharge are formed.

[0085] The first entrance (510) may be arranged on the first side, and the second entrance (520) may be formed on the second side facing the first side.

[0086] Referring to Fig. 6a, when the disk filter device operates in a filtration mode, the piston gap adjustment unit (300) pushes the piston in a direction that applies pressure to the plurality of disk filters (100) to apply a certain pressure to the plurality of disk filters (100). Accordingly, the gap between the plurality of disk filters (100) is adjusted to a first gap.

[0087] When the spacing between the plurality of disk filters (100) is adjusted to the first spacing, inflow water is supplied to the first inlet (510). Impurities are filtered through the process of the inflow water flowing from the outside to the inside of the plurality of disk filters (100) having the first spacing, or flowing from the inside to the outside.

[0088] The filtered water filtered by the above plurality of disk filters (100) is discharged through the second inlet (520).

[0089] Referring to Fig. 6b, when the disk filter device is used for a long period of time, the disk filter device may operate in a reverse washing mode.

[0090] When the above disk filter device operates in reverse mode, the piston gap adjustment unit (300) pushes the piston in a direction that relieves pressure on the plurality of disk filters (100) to relieve the pressure applied to the plurality of disk filters (100). Accordingly, the gap between the plurality of disk filters (100) is adjusted to a second gap that is wider than the first gap.

[0091] When the spacing of the plurality of disk filters (100) is adjusted to the second spacing, the liquid flow direction can be controlled in the opposite direction to the filtration mode and the flow rate can be set to at least twice or more.

[0092] Accordingly, the reverse-washing inflow water is supplied to the second entrance (520). The reverse-washing inflow water is washed away by the process of flowing from the outside to the inside of the plurality of disk filters (100) widened by the second interval, or from the inside to the outside.

[0093] The reverse-washing discharge water that washes the above plurality of disk filters (100) is discharged through the first inlet (510).

[0094]

[0095] According to embodiments of the present invention, a disk filter has a structure in which a fiber media made of a single or multiple fiber threads is wound multiple times around a plurality of sawtooth-shaped protrusions, thereby increasing the overall filtration volume of the disk filter and improving filtration performance by forming pores of various sizes.

[0096] Additionally, if the filtration volume of the above-mentioned disk filter increases, the usage time (filtration time) of the above-mentioned disk filter can be increased.

[0097] In addition, according to one embodiment, the fiber filter material can be easily washed using a pH-adjusted chemical or neutral detergent after being used for a long period of time, so that it can be reused.

[0098] Although the present invention has been described above with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below.

Claims

1. A disk plate having a disk shape and having a plurality of protrusions spaced apart from each other in a sawtooth shape along the outer circumference of the filter area between the inner and outer circumferences; and A disk filter comprising a fiber filter wound around the protrusions of the disk plate.

2. In the first paragraph, the fiber material comprises a single or multiple fibers, A disk filter characterized in that the fiber material is wound around the protrusions while alternately passing over the upper surfaces of adjacent protrusions and the lower surfaces facing the upper surfaces.

3. In the first paragraph, the fiber filter of the nth (n is a natural number) turns passes through the upper surface of the protrusion of the first group and passes through the lower surface of the protrusion of the second group through the space between the protrusion and the adjacent protrusion, A disk filter characterized in that the fiber media of the (n+1)th turn is wound around the protrusions in a manner opposite to the nth turn, passing over the upper surface of the protrusions of the second group and passing over the lower surface of the protrusions of the first group through a space between the protrusions and the adjacent protrusions.

4. A disk filter according to claim 1, characterized in that each end of the protrusions corresponding to the outer circumference of the disk plate has a curved portion.

5. A disk filter characterized in that, in the first paragraph, each end of the protrusions corresponding to the outer circumference of the disk plate has a protrusion that protrudes in a hook shape toward the space between the protrusions.

6. A step of forming a disk plate having a disk shape and having a plurality of protrusions spaced apart from each other along the outer circumference in a sawtooth shape in the filter area between the inner and outer circumferences; and A method for manufacturing a disk filter, comprising the step of winding a fiber filter material on the protrusions of the disk plate.

7. In paragraph 6, the fiber material comprises a single or multiple fibers, A method for manufacturing a disk filter further comprising a step of winding the fiber filter around the protrusions while alternately passing over the upper surfaces of adjacent protrusions and the lower surfaces facing the upper surfaces.

8. In the sixth paragraph, the nth (n is a natural number) round of fiber material is wound through the upper surface of the first group of protrusions and the space between the protrusions and the adjacent protrusions, and through the lower surface of the second group of protrusions; and A method for manufacturing a disk filter further comprising the step of winding the fiber media of the (n+1)th turn, opposite to the nth turn, past the upper surface of the protrusion of the second group and past the lower surface of the protrusion of the first group through a space between adjacent protrusions.

9. A disk filter comprising a disk plate having a disk shape and a plurality of protrusions spaced apart from each other along the outer circumference in a sawtooth shape in a filter area between the inner and outer circumferences, and a fiber filter wound around the protrusions of the disk plate; and A gap adjustment unit is disposed on the top layer of a plurality of stacked disk filters, and adjusts the gap between the plurality of disk filters to a first gap during the filtration mode and to a second gap wider than the first gap during the reverse wash mode. A disk filter device characterized in that during the filtration mode, the inflow water is filtered through the plurality of disk filters, and during the backwash mode, the backwash inflow water washes away waste accumulated on the plurality of disk filters.

10. In paragraph 9, the fiber material comprises a single or multiple fibers, A disk filter device characterized in that the fiber filter is wound around the protrusions while alternately passing over the upper surfaces of adjacent protrusions and the lower surfaces facing the upper surfaces.

11. In the 9th paragraph, the nth (n is a natural number) turn of fiber media wound around the disk filter passes through the upper surface of the first group of protrusions and the lower surface of the second group of protrusions through a space between the protrusions and the adjacent protrusions, A disk filter device characterized in that the fiber media of the (n+1)th turn is wound around the protrusions in a manner opposite to the nth turn, passing over the upper surface of the protrusions of the second group and passing over the lower surface of the protrusions of the first group through a space between the protrusions and the adjacent protrusions.

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