Purification system using oil adsorption cloth comprising feathers

Abstract

Disclosed is a purification system using an oil adsorption cloth. The purification system using an oil adsorption cloth comprises: a lower oil adsorption tank into which contaminated water having oil mixed therein is introduced and in which the contaminated water is stored; an upper oil extraction and restoration tank disposed above the lower adsorption tank so as to be spaced apart therefrom by a predetermined distance and comprising an oil adsorption cloth compression press; a conveyor-type chain unit comprising a pair of chains rotatably installed in the form of an endless track, the upper part of the endless track passing through the upper oil extraction and restoration tank and the lower part of the endless track passing through the oil adsorption tank; and a plurality of oil adsorption cloths disposed between the pair of chains to have a predetermined length in the longitudinal direction of the pair of chains.

Description

Purification system using oil adsorption cloth containing feathers

[0001] The present invention relates to a purification system, and more particularly, to a purification system using an oil adsorption cloth that purifies contaminated water mixed with oil by adsorbing and removing oil.

[0002] In general, when maritime accidents occur due to ships (especially oil tankers transporting crude oil) colliding with each other or running aground on rivers and oceans, the oil loaded on the ships spills, causing serious environmental pollution such as polluting rivers and oceans.

[0003] In this way, once spilled, oil spreads rapidly through currents, making it very difficult to collect.

[0004] Accordingly, the spilled oil causes serious problems such as destroying the ecosystem by killing fish and shellfish and making the fishermen's economy difficult.

[0005] Of course, as mentioned above, when a large-scale oil spill occurs in the ocean, oil fences are installed, absorbent cloths are used to collect the oil, and oil collection work such as spraying emulsifiers is carried out. However, since an effective collection device that can collect the oil in a short period of time has not been developed, considerable damage is being suffered.

[0006] [Prior Art Literature]

[0007] [Patent Document]

[0008] Korean Patent Publication No. 10-2009-0104338

[0009] Therefore, the problem to be solved by the present invention is to provide a purification system using an oil adsorption cloth that can rapidly adsorb and then remove oil contained in contaminated water, and can immediately dry a wet oil adsorption cloth during the oil adsorption and removal process, so that the oil adsorption and removal process using the oil adsorption cloth can be repeated and continued.

[0010] A purification system using an oil adsorption pad according to one embodiment of the present invention comprises: a lower oil adsorption tank into which contaminated water mixed with oil is introduced and stored; an upper oil extraction recovery tank disposed above the lower adsorption tank at a predetermined distance and including an oil adsorption pad press; a conveyor-shaped chain unit including a pair of chains rotatably installed in an endless track shape, the upper portion of the endless track passing through the upper oil extraction recovery tank and the lower portion of the endless track passing through the oil adsorption tank; and a plurality of oil adsorption pads disposed between the pair of chains along the longitudinal direction of the pair of chains at a predetermined length, wherein the oil adsorption pads include an outer frame having a mesh structure and a predetermined shape so as to have a filling space; at least one inner frame accommodated in all or part of the filling space of the outer frame, the inner frame having two ends that are not connected to each other and having a ring structure when viewed from the left and right, and having elasticity that can be contracted and restored toward the center of the ring structure; And it is characterized in that it is configured such that when the chain unit rotates and the oil adsorption cloth is located in the lower section of the endless track, it comes into contact with the water surface of the contaminated water of the oil adsorption tank to adsorb the oil, and when the oil adsorption cloth that has adsorbed the oil is located in the upper section of the endless track, the oil adsorbed by the oil adsorption cloth is extracted and removed in the upper oil extraction recovery tank.

[0011] In one embodiment, the oil absorbent pad compression press comprises: a base plate disposed below the oil absorbent pads when the plurality of oil absorbent pads move in the upper section of the infinite track in the upper direction of the infinite track, and having a width corresponding to the distance between the pair of chains; and an adsorption pad pressing plate disposed above the base plate at a predetermined distance, having a width greater than the width of the base plate, and pressurizing the plurality of oil absorbent pads when the plurality of oil absorbent pads move in the upper section of the infinite track, wherein a plurality of needles may be arranged on a bottom surface of the adsorption pad pressing plate.

[0012] In one embodiment, the upper oil extraction recovery tank further includes an adsorbent dryer, and the adsorbent dryer can be arranged adjacent to the oil adsorbent pressing press to dry the oil adsorbent after oil adsorption and removal.

[0013] In one embodiment, the outer frame is provided with a cylindrical structure having a long length in one direction, a plurality of inner frames are arranged at a constant interval along the longitudinal direction of the outer frame, and a portion of the feathers filled in the filling space can be surrounded by the plurality of inner frames.

[0014] In one embodiment, each of the plurality of inner frames is provided with a spring structure that rotates helically by more than 360 degrees, and each of the inner frames can be contracted and restored toward the center of the spring structure.

[0015] In one embodiment, the plurality of inner frames may be arranged along the longitudinal direction of the outer frame by having one point fixed to an inner frame support bar inserted into the outer frame parallel to the longitudinal direction of the outer frame.

[0016] In one embodiment, the feathers may be feathers having stems.

[0017] In one embodiment, the support bar and a plurality of inner frames connected to the support bar may be arranged in two or more rows within the filling space to form a multi-layer structure.

[0018] In one embodiment, the outer frame may be provided in an embossed shape by quilting the space between the plurality of inner frames.

[0019] In one embodiment, the outer frame may be provided with a multi-layer structure in which a plurality of outer frames are connected in a direction perpendicular to the longitudinal direction thereof.

[0020] In one embodiment, a connecting rod having a length greater than the length of the outer frame may be fixed parallel to the longitudinal direction of the outer frame on the outer side of one of the two outer frames positioned at both ends of the plurality of outer frames connected in the multi-layer structure.

[0021] In one embodiment, each of the inner frames may further include a plurality of needles arranged along the circumferential direction of the inner frame.

[0022] In one embodiment, the plurality of needles may be hook-shaped.

[0023] By using a purification system using an oil adsorption cloth according to the present invention, oil contained in contaminated water can be quickly adsorbed and then removed, and the wet oil adsorption cloth can be immediately dried during the oil adsorption and removal process, so there is an advantage in that the oil adsorption and removal process using the oil adsorption cloth can be repeated and continued.

[0024] In addition, since the compressed oil absorbent pad can be immediately spread out in the process of removing oil absorbed in the oil absorbent pad, drying of the oil absorbent pad can be facilitated.

[0025] FIG. 1 is a drawing for explaining the configuration of a purification system using an oil adsorption cloth according to one embodiment of the present invention.

[0026] Figure 2 is a side view of Figure 1.

[0027] Figure 3 is a perspective view showing the configuration of the oil adsorption pad illustrated in Figure 1.

[0028] Figure 4 is a drawing showing a plurality of oil adsorption pads shown in Figure 3 connected together.

[0029] Hereinafter, a purification system using an oil adsorption pad according to an embodiment of the present invention will be described in detail with reference to the attached drawings. The present invention can be modified in various ways and can take various forms, and 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 it should be understood that all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention are included. In describing each drawing, similar reference numerals are used to indicate similar components. In the attached drawings, the dimensions of structures are shown larger than actual size to ensure 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" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0032] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one 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 interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0033] FIG. 1 is a drawing for explaining the configuration of a purification system using an oil adsorption cloth according to one embodiment of the present invention, and FIG. 2 is a side view of FIG. 1.

[0034] Referring to FIGS. 1 and 2, a purification system using an oil adsorption pad according to one embodiment of the present invention may include a lower oil adsorption tank (100), an upper oil extraction recovery tank (200), a chain unit (300), and a plurality of oil adsorption pads (400).

[0035] The lower oil adsorption tank (100) can receive and store contaminated water mixed with oil. For example, the lower oil adsorption tank (100) can be in the form of a rectangular parallelepiped tank. In addition, although not shown, in order to introduce contaminated water into the lower oil adsorption tank (100), a pump for pumping contaminated water and a primary storage tank can be installed through pipes at the front end of the lower oil adsorption tank (100). In this case, contaminated water can be introduced into the lower oil adsorption tank (100) from the primary storage tank through the pipes.

[0036] The upper oil extraction recovery tank (200) is positioned a certain distance above the lower adsorption tank (100) and may include an oil absorption cloth compression press (220). For example, the upper oil extraction recovery tank (200) may have an oil absorption cloth compression press (220) positioned above an oil collection tank (210) that collects oil.

[0037] The chain unit (300) includes a pair of chains (310) that are installed rotatably in the form of an endless track, and the upper section of the endless track can be arranged to pass through the upper oil extraction recovery tank, and the lower section of the endless track can be arranged to pass through the oil absorption tank.

[0038] A plurality of oil absorbent pads (400) may be arranged between a pair of chains at a predetermined length along the longitudinal direction of the pair of chains. The plurality of oil absorbent pads (400) may be connected to each other and arranged between a pair of chains (310) in a rectangular shape having a width less than the distance spaced apart in the horizontal direction of the pair of chains (310). For example, the plurality of oil absorbent pads (400) may be fixed to a plurality of absorbent pad support bars (320) arranged at predetermined intervals between a pair of chains (310) in an upper or lower section of an infinite track, and may move along the upper and lower sections of the infinite track of the chain unit (300).

[0039] The purification system using the oil adsorption cloth of the present invention can be configured so that when the chain unit (300) rotates and the oil adsorption cloth (400) moves in the lower section of the endless track, it comes into contact with the surface of the contaminated water of the oil adsorption tank (100) to adsorb the oil, and when the oil adsorption cloth (400) that has adsorbed the oil moves in the upper section of the endless track, the oil adsorbed by the oil adsorption cloth (400) is extracted and removed in the upper oil extraction recovery tank (200).

[0040] For example, a pair of chains (310) may be arranged so that the lower section of the endless track passes through the lower oil adsorption tank (100) so that the oil adsorption cloth (400) comes into contact with or is submerged in the water surface of the lower oil adsorption tank (100), and the upper section of the endless track passes through the upper oil extraction recovery tank (200) so that the oil adsorption cloth (400) is pressurized by the oil adsorption cloth compression press (220).

[0041] For example, an oil absorbent pad compression press (220) may include a base plate (221) and an absorbent pad pressing plate (222).

[0042] The base plate (221) is arranged below the oil adsorption pads (400) when the plurality of oil adsorption pads (400) move in the upper section of the infinite track in the upper direction of the infinite track, and may be provided to have a width corresponding to the distance between a pair of chains (310). For example, the base plate (221) may be positioned between the contaminated water collection tank (210) and the upper section of the infinite track of the pair of chains (310), and may be provided in the form of a perforated plate so that oil extracted from the oil adsorption pads (400) by the adsorption pad pressing plate (222) falls into the oil collection tank (210).

[0043] The absorbent pad press plate (222) is positioned at a certain distance above the base plate (221), has a width greater than the width of the base plate (221), and can pressurize a plurality of oil absorbent pads (400) when the plurality of oil absorbent pads (400) move in the upper section of the infinite track.

[0044] Meanwhile, the upper oil extraction recovery tank (200) may further include an adsorption dryer (230).

[0045] The adsorbent dryer (230) may be placed adjacent to the oil adsorbent pressing press (220). That is, it may be placed at the rear end of the oil adsorbent pressing press (220) so as to dry a plurality of oil adsorbents (400) after the plurality of oil adsorbents (400) are pressurized by the oil adsorbent pressing press (220). For example, the adsorbent dryer (230) may be a hot air blower.

[0046] Below, the configuration of the oil adsorption pad (400) is described in detail.

[0047] Fig. 3 is a perspective view showing the configuration of the oil absorbent pad illustrated in Fig. 1, and Fig. 4 is a drawing showing a plurality of oil absorbent pads illustrated in Fig. 3 connected together. In Fig. 3, some of the feathers (430) are omitted.

[0048] Referring to FIG. 3, the oil absorbent pad (400) may include an outer frame (410), an inner frame (420), and feathers (430).

[0049] The outer frame (410) accommodates the inner frame (420) and the feathers (430), and may be provided in a predetermined shape with a mesh structure and a filling space (411). For example, the outer frame (410) may be provided in a cylindrical structure with a long length in one direction. The outer frame (410) may be formed of a non-hygroscopic material. For example, it may be made of nylon.

[0050] The inner frame (420) can be accommodated in all or part of the filling space (411) of the outer frame (410). The inner frame (420) can have two ends that are not connected to each other, and can be provided with a shape that has a ring structure when viewed from the left and right sides of the two ends, and can have elasticity that can be contracted and restored toward the center of the ring structure.

[0051] In one embodiment, the inner frame (420) may be provided with a spring structure that rotates helically by more than 360 degrees. In this case, the inner frame (420) may be contracted and restored toward the center of the spring structure. For example, the inner frame (420) may be formed of elastic plastic or elastic stainless steel.

[0052] At least one inner frame (420) may be provided. In one embodiment, a plurality of inner frames (420) may be arranged at regular intervals along the longitudinal direction of the outer frame (410). In this case, a plurality of inner frames (420) may be arranged along the longitudinal direction of the outer frame (410) by having one point fixed to an inner frame support bar (440) inserted into the outer frame (410) parallel to the longitudinal direction of the outer frame (410).

[0053] In addition, a plurality of inner frames (420) fixed to the inner frame support bar (440) may be filled in one row within the filling space (411). Alternatively, they may be arranged in two or more rows to form a multi-layer structure.

[0054] The feathers (430) may be filled in the filling space (411) and surrounded by an inner frame (420). For example, they may be surrounded by a plurality of inner frames (420). The feathers (430) may be feathers having stems. Having a stem prevents entanglement and is economically advantageous because it is inexpensive.

[0055] Meanwhile, the outer frame (410) may be quilted at regular intervals along its length. For example, the spaces between multiple inner frames (420) may be quilted to form an embossed shape. Accordingly, entanglement of the down feathers (430) can be prevented, and the quilted portion can be cut to a required size for use.

[0056] In addition, the outer frame (410) may be connected in a number of directions perpendicular to its length to form a multi-layer structure as shown in Fig. 4. The manufacturing size of the oil absorption pad may vary depending on the number of connections of the outer frame (410).

[0057] In addition, a connecting rod (450) may be provided on one side of the outer frame (410). For example, among a plurality of outer frames (410) connected in a multi-layer structure, a connecting rod (450) may be fixed parallel to the length direction of the outer frame (410) so as to have a length greater than the length of the outer frame (410) on the outer side of one of the two outer frames (410) located at both ends.

[0058] The above connecting rod (450) enables the outer frame (410) to be wound around its circumference using the connecting rod (450) as a starting point, and thus the outer frame (410) can be easily wound by the connecting rod (450).

[0059] In one embodiment, the connecting rod (450) may include a columnar insertion protrusion (451) having one end that is hollow and the other end that has a diameter smaller than the outer diameter of the connecting rod (450). In this case, if there are multiple connecting rods (450), each connecting rod (450) may be connected by inserting the insertion protrusion (451) into the hollow portion. That is, multiple oil adsorbents having connecting rods (450) may be connected via the connecting rods (450).

[0060] This oil absorption pad (400) is provided with a plurality of inner frames (420) having a spring structure inside the outer frame (410), so that when the filling space (411) of the outer frame (410) is filled with feathers (430), the plurality of inner frames (420) surround the feathers (430), so that the movement of the feathers (430) can be restricted by the plurality of inner frames (420). Accordingly, the entanglement of the feathers is minimized, and the oil absorption efficiency can be prevented from being lowered due to the entanglement of the feathers (430), thereby improving the oil absorption efficiency.

[0061] In addition, since the plurality of inner frames (420) are provided with a spirally rotating spring structure, when the outer frame (410) is wound along its circumference, the plurality of inner frames (420) contract in the spirally circumferential direction and compress the feathers (430), thereby reducing the volume of the oil absorption pad and facilitating storage. When the outer frame (410) is unwound and unfolded, the plurality of inner frames (420) are restored and the compressed feathers (430) can unfold again to have a gap.

[0062] Meanwhile, the oil adsorption pad (400) may further include a plurality of needles (421) arranged along the circumferential direction of the inner frame (420) on the inner side of the inner frame (420).

[0063] Each of the plurality of needles (421) may have a hook shape. Some of the hairs (430) may be caught and fixed on these plurality of needles (421). In this case, the movement of the hairs (430) is further restricted, which may further prevent entanglement of the hairs (430), thereby being advantageous in securing a gap.

[0064] In addition, the plurality of needles (421) can further prevent clumping and entanglement of the feathers (430) by pulling the feathers (430) when the outer frame (410) and the inner frame (420) are wound to compress the feathers (430) and then the inner frame (420) is restored and the outer frame (410) is spread out.

[0065] Meanwhile, in a purification system using an oil adsorption pad according to one embodiment of the present invention, the adsorption pad pressing plate (222) may have a plurality of needles (223) arranged on the bottom surface thereof. For example, the needles (223) may be formed in a hook shape. When the adsorption pad pressing plate (222) presses a plurality of oil adsorption pads (400), the plurality of needles (223) penetrate the mesh-structured outer frame (410) of the oil adsorption pad (400) and are caught on the outer frame (410). In this state, when the adsorption pad pressing plate (222) is separated from the oil adsorption pad (400), the compressed outer frame (410) of the oil adsorption pad (400) is pulled to quickly restore the compressed outer frame (410), and accordingly, the compressed feathers (430) can be easily and quickly spread out.

[0066] Hereinafter, a process of removing oil by adsorbing it from contaminated water containing oil using a purification system using an oil adsorption cloth according to one embodiment of the present invention is described.

[0067] First, when a plurality of oil adsorption pads (400) are positioned on the upper section of the endless track of a pair of chains (310), and the pair of chains (310) rotates so that a plurality of oil adsorption pads (400) are positioned on the lower section of the endless track and move, the plurality of oil adsorption pads (400) move while adsorbing oil mixed in the contaminated water stored in the lower oil adsorption tank (100) by coming into contact with or being immersed in the contaminated water.

[0068] Next, when a pair of chains (310) continues to rotate, and a plurality of oil absorbent pads (400) that have absorbed oil move to the upper section of the endless track of a pair of chains (310), the plurality of oil absorbent pads (400) face the upper oil juice recovery tank (200), and at this time, the absorbent pad pressing plate (222) of the oil absorbent pad pressing press (220) descends to pressurize some or all of the plurality of oil absorbent pads (400), so that the oil absorbed by the plurality of oil absorbent pads (400) is extracted and collected into the oil collection tank (210), and a plurality of needles (223) provided on the lower surface of the absorbent pad pressing plate (222) penetrate the outer frame (410) of the plurality of oil absorbent pads (400) and are caught on the mesh forming the outer frame (410).

[0069] After pressurizing a plurality of oil absorbent pads (400), the absorbent pad press plate (222) rises and is separated from the oil absorbent pads (400). At this time, a plurality of needles (223) on the bottom surface of the absorbent pad press plate (222) pull and unfold the compressed outer frame (410).

[0070] Next, as a pair of chains (310) continue to rotate, when a plurality of oil absorbent pads (400) from which oil has been extracted face the absorbent pad dryer (230), hot air is discharged from the absorbent pad dryer (230) to dry the feathers (430) of the plurality of oil absorbent pads (400).

[0071] After the feathers (430) are dried, a pair of chains (310) can continue to rotate so that the oil adsorption and removal and drying process described above can continue.

[0072] By using a purification system using an oil adsorption cloth according to one embodiment of the present invention, oil contained in contaminated water can be quickly adsorbed and then removed, and the wet oil adsorption cloth can be immediately dried during the oil adsorption and removal process, so there is an advantage in that the oil adsorption and removal process using the oil adsorption cloth can be repeated and continued.

[0073] In addition, since the compressed oil adsorption cloth (400) can be immediately spread out in the process of removing oil adsorbed on the oil adsorption cloth (400), drying of the oil adsorption cloth (400) can be facilitated.

[0074] The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments disclosed herein, but is to be construed in the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. Lower oil absorption tank into which contaminated water mixed with oil is introduced and stored; An upper oil extraction recovery tank, which is positioned a certain distance above the lower adsorption tank and includes an oil adsorption cloth pressing press; A chain unit in the form of a conveyor, comprising a pair of chains installed in a rotatably tracked form, the upper part of the track passing through the upper oil extraction recovery tank, and the lower part of the track passing through the oil absorption tank; and It comprises a plurality of oil absorbent pads arranged along the length of the pair of chains between the pair of chains, The above oil absorbent pad, An outer frame having a mesh structure and a predetermined shape to have a filling space; At least one inner frame, which is accommodated in all or part of the filling space of the outer frame and has two ends that are not connected to each other and has a shape that has a ring structure when viewed so that the two ends are positioned on the left and right, and has elasticity that can be contracted and restored toward the center of the ring structure; and Including feathers filled in the above filling space and surrounded by at least one inner frame, The above chain unit is characterized in that when the oil adsorption pad is positioned in the lower section of the endless track by rotating, it comes into contact with the water surface of the contaminated water of the oil adsorption tank to adsorb the oil, and when the oil adsorption pad that has adsorbed the oil is positioned in the upper section of the endless track, the oil adsorbed by the oil adsorption pad is extracted and removed in the upper oil extraction recovery tank. Purification system using oil adsorption pad.

2. In paragraph 1, The above oil adsorption pad compression press, A base plate arranged below the oil absorbent pads when the plurality of oil absorbent pads move in the upper section of the infinite track in the upper direction of the infinite track and having a width corresponding to the distance between the pair of chains; and It includes an adsorption pad press plate that is arranged at a certain distance above the base plate, has a width greater than the width of the base plate, and pressurizes the plurality of oil adsorption pads when the plurality of oil adsorption pads move in the upper section of the infinite track. A number of needles are arranged on the bottom surface of the above absorbent pad press plate. Purification system using oil adsorption pad.

3. In paragraph 2, The upper oil extraction recovery tank further includes an adsorption dryer, The above adsorption pad dryer is arranged adjacent to the oil adsorption pad pressing press and is configured to dry the oil adsorption pad after oil adsorption and removal. Purification system using oil adsorption pad.

4. In paragraph 1, The above outer frame is provided with a cylindrical structure having a long length in one direction, The above inner frames are arranged in a number of pieces spaced apart at regular intervals along the length direction of the above outer frame, Some of the feathers that fill the above-mentioned filling space are surrounded by the above-mentioned multiple inner frames. Purification system using oil adsorption pad.

5. In paragraph 4, Each of the above multiple inner frames is equipped with a spring structure that rotates more than 360 degrees in a spiral shape, Each of the above inner frames contracts and restores toward the center of the spring structure. Purification system using oil adsorption pad.

6. In paragraph 5, The above plurality of inner frames are arranged along the longitudinal direction of the outer frame by having one point fixed to an inner frame support bar inserted into the outer frame parallel to the longitudinal direction of the outer frame. Purification system using oil adsorption pad.

7. In paragraph 6, The above mentioned feathers are feathers with stems, Purification system using oil adsorption pad.

8. In paragraph 6, The above support bar and a plurality of internal frames connected to the above support bar are arranged in two or more rows within the above filling space and are provided with a multi-layer structure. Purification system using oil adsorption pad.

9. In paragraph 8, The above outer frame is provided in an embossed shape by quilting the spaces between the above multiple inner frames. Purification system using oil adsorption pad.

10. In paragraph 9, The above outer frame is provided with a multi-layer structure in which a plurality of frames are connected in a direction perpendicular to its length. Purification system using oil adsorption pad.

11. In paragraph 10, Among the multiple outer frames connected in the above multilayer structure, a connecting rod having a length greater than the length of the outer frame is fixed parallel to the longitudinal direction of the outer frame on the outer side of one of the two outer frames located at both ends. Purification system using oil adsorption pad.

12. In paragraph 5, Further comprising a plurality of needles arranged along the circumferential direction of the inner frame on the inner side of each of the inner frames, Purification system using oil adsorption pad.

13. In paragraph 12, The above multiple needles have a hook shape, Purification system using oil adsorption pad.

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