Filtering device

Abstract

A filter device according to an embodiment of the present application is provided. The device includes: a filter tank having a raw water inlet pipe and a backwash water outlet pipe connected to an upper portion thereof, and a treated water outlet pipe, a backwash water inlet pipe, and a backwash air inlet pipe connected to a lower portion thereof; a coarse filter provided in the filter tank and having a plurality of water passage holes formed in a side surface thereof, and a lower side thereof communicated with the treated water outlet pipe; a filter tank having a raw water inlet pipe and a backwash water outlet pipe connected to an upper portion thereof, and a treated water outlet pipe, a backwash water inlet pipe, and a backwash air inlet pipe connected to a lower portion thereof; a coarse filter provided in the filter tank and having a plurality of water passage holes formed in a side surface thereof, and a lower side thereof communicated with the treated water outlet pipe; a filter portion including a fiber filter material, an upper side support portion, and a lower side support portion, the fiber filter material forming a filter pore layer on an outer circumferential surface of the coarse filter, the upper side support portion combined with an upper side of the fiber filter material, and the lower side support portion combined with a lower side of the fiber filter material; and a filter control portion having a cylinder disposed inside the coarse filter, and a piston ascending and descending in the cylinder, the upper side support portion ascending and descending while the fiber filter material is pressed or relaxed with respect to the coarse filter as the piston ascends and descends, thereby controlling pores of the fiber filter material.

Description

TECHNICAL FIELD

[0001] The present application relates to a filter device. BACKGROUND

[0002] Generally, a filter is a device that filters contaminated raw water through a filter screen and discharges clean treated water. The filter is gradually becoming larger to filter large rivers or factory wastewater.

[0003] As a filter for this purpose, a pore-controlled fiber filter (PCF filter) can be cited as a representative example. The pore-controlled fiber filter bundles a fiber having a fine filament into a bundle shape and arranges it on a path of flowing water as a filter material, which is called a "fiber filter material".

[0004] The fiber filter material is easy to adjust the pores formed by the fine filaments by physical control, and has excellent filtration performance, and is easy to clean and has a long service life. In particular, it has been proven that the removal efficiency by particle size, the removal efficiency of SS, the removal efficiency of BOD, and the like are superior to other filtration methods.

[0005] In the conventional PCF filter, a cylinder for pressing and relaxing the fiber filter material is usually located on the outer side of the upper portion of the filter. In the case of installation in a space having a limited height or area such as a building or a container, the height of the filter layer is reduced by the size of the height of the cylinder, thereby reducing the treatment capacity.

[0006] In addition, in order to disassemble and assemble the filter, a structure in which an outer cylinder is divided by a flange is mainly used. In the case of using a flat plate packing by setting the flange to a flat plate structure, when the internal pressure of the filter increases to a predetermined size or more, there is a problem that water leakage occurs. In the case of machining a groove on the flange and using O-ring packing, although water leakage does not occur, there is a disadvantage that the machining cost is high. In addition, in the case of an excess door provided for the convenience of filter material replacement work and the like, a flat flange similar to the outer cylinder division flange is used, and there is a problem that water leakage occurs when the internal pressure of the filter increases to a predetermined size or more. SUMMARY

[0007] Problems to be Solved by the Invention

[0008] To solve the above problems, the present application aims to provide a filter device that improves space efficiency and air tightness.

[0009] The technical problems of the present application are not limited to the above-mentioned technical problems, and other technical problems not mentioned can be clearly understood by those skilled in the art from the following description.

[0010] Means for Solving the Problems

[0011] According to an embodiment of the present application, there is provided a filter device. The device can include a filter tank having a raw water inlet pipe and a backwash water outlet pipe coupled to an upper portion thereof, and a treated water outlet pipe, a backwash water inlet pipe, and a backwash air inlet pipe coupled to a lower portion thereof; a coarse filter disposed in the filter tank and having a plurality of water passage holes formed in a side surface thereof, and a lower side in communication with the treated water outlet pipe; a filter portion including a fiber filter material forming a filter pore layer on an outer circumferential surface of the coarse filter, an upper side support portion coupled to an upper side of the fiber filter material, and a lower side support portion coupled to a lower side of the fiber filter material; and a filter control portion having a cylinder disposed inside the coarse filter, and a piston ascending and descending in the cylinder, the upper side support portion being raised and lowered while the fiber filter material is pressed or relaxed with respect to the coarse filter as the piston is raised and lowered, thereby controlling pores of the fiber filter material.

[0012] Further, an accommodation space recessed downward to accommodate the cylinder can be formed in an upper side of the coarse filter, and an open surface of the accommodation space can be shielded by a sealing plate coupled to an upper end of the coarse filter.

[0013] Further, a rod of the piston can be fixedly coupled to an upper portion of the filter tank, the cylinder can be coupled to the upper side support portion, and the upper side support portion can be raised and lowered by the cylinder being relatively raised and lowered by the piston.

[0014] Further, a rod of the piston can be fixedly coupled to an upper portion of the filter tank, the cylinder can be coupled to the second portion coarse filter, and the second portion coarse filter and the upper side support portion supported by the second portion coarse filter can be raised and lowered by the cylinder being relatively raised and lowered by the piston.

[0015] Further, the coarse filter can include a first portion coarse filter and a second portion coarse filter changing an overall length of the coarse filter while being raised and lowered in an upper side of the first portion coarse filter, the second portion coarse filter being coupled to the piston and being raised and lowered in conjunction with the piston.

[0016] Further, the filter tank can include an upper housing, at least one intermediate housing, and a lower housing, a first coupling structure being used at a lower end of the upper housing and a lower end of the intermediate housing, respectively, and a second coupling structure being used at an upper end of the lower housing and an upper end of the intermediate housing, respectively, so that the filter tank is assembled by coupling between the first coupling structure and the second coupling structure.

[0017] Further, the first coupling structure can include a first protrusion protruding downward, the second coupling structure can include a first recess formed by being bent in a manner of surrounding the first protrusion, and a first sealing portion of an elastic material can be provided between the first protrusion and the first recess, and the filter tank can be maintained airtight by the close contact of the first protrusion and the first recess.

[0018] Further, the first coupling structure can further include an upper fastening portion formed to extend from one side of the first protrusion, the second coupling structure can further include a lower fastening portion formed to extend from one side of the first recess, and at least one first threaded member can be threadedly coupled through the upper fastening portion and the lower fastening portion.

[0019] Further, the filter tank can include a filter tank body formed with an open area on one side, and a filter tank door coupled to the filter tank body and sealing the open area, a second protrusion can be formed along a circumference of the open area of the filter tank body and toward the filter tank door, and a second recess can be formed by being bent in a manner of surrounding the second protrusion of the filter tank door, and a second sealing portion of an elastic material can be provided between the second protrusion and the second recess, and the filter tank can be maintained airtight by the close contact of the second protrusion and the second recess.

[0020] Further, a door fastening portion can be formed to extend from one side of the second recess, and at least one second threaded member can be threadedly coupled through the door fastening portion and the filter tank body.

[0021] A filter system according to an embodiment of the present application is provided. The system can include a filter device according to an embodiment of the present application, and a pipe mixer mixing a coagulant in raw water flowing in a raw water pipe connected to a front end of the pipe mixer, and connecting the filter device through a raw water inflow pipe connected to a rear end of the pipe mixer, the filter device being configured in a plurality and connected in parallel to the rear end of the pipe mixer.

[0022] A filter device according to an embodiment of the present application is provided. The device can include a filter tank having a raw water inflow pipe and a backwash water discharge pipe connected to an upper portion thereof, and a treated water discharge pipe, a backwash water inflow pipe, and a backwash air inflow pipe connected to a lower portion thereof, the filter tank including an upper housing, at least one intermediate housing, and a lower housing, a first coupling structure being used at a lower end of the upper housing and a lower end of the intermediate housing, respectively, and a second coupling structure being used at an upper end of the lower housing and an upper end of the intermediate housing, respectively, so that the filter tank is assembled by the coupling between the first coupling structure and the second coupling structure.

[0023] Further, the first coupling structure can include a first protrusion portion protruding downward, the second coupling structure can include a first recess portion bent to surround the protrusion portion, and a first sealing portion of an elastic material can be provided between the protrusion portion and the recess portion to maintain the air tightness of the filter tank by the close contact of the protrusion portion and the recess portion.

[0024] Further, the first coupling structure can include an upper fastening portion extending from one side of the first protrusion portion, the second coupling structure can include a lower fastening portion extending from one side of the first recess portion, and at least one first threaded member can be threadedly coupled through the upper fastening portion and the lower fastening portion.

[0025] The filter device can include at least one of a coarse filter provided in the filter tank and having a plurality of water passage holes formed in a side surface thereof and a lower side communicated with the treated water discharge pipe, a filter portion including a fiber filter material forming a filter pore layer on an outer circumferential surface of the coarse filter, an upper support portion coupled to an upper side of the fiber filter material, and a lower support portion coupled to a lower side of the fiber filter material, and a filter control portion having a cylinder and a piston ascending and descending in the cylinder, the upper support portion being ascended and descended while the fiber filter material is pressed or relaxed with respect to the coarse filter as the piston ascends and descends, thereby controlling a pore of the fiber filter material.

[0026] According to an embodiment of the present application, there is provided a filter device. The device can include a filter tank body having an open area formed in one side thereof, and a filter tank door coupled to the filter tank body and sealing the open area, a second protrusion portion formed along a circumferential edge of the open area of the filter tank body and toward the filter tank door, and a second recess portion bent to surround the second protrusion portion formed in the filter tank door, and a second sealing portion of an elastic material provided between the second protrusion portion and the recess portion to maintain the air tightness of the filter tank by the close contact of the second protrusion portion and the second recess portion.

[0027] Further, a door fastening portion can be formed from one side of the second recess portion, and at least one second threaded member can be threadedly coupled through the door fastening portion and the filter tank body.

[0028] The filter device can include at least one of a coarse filter disposed in the filter tank and formed with a plurality of water passage holes on a side surface and communicated with the treated water discharge pipe on a lower side, a filter portion including a fiber filter material forming a filter pore layer on an outer circumferential surface of the coarse filter, an upper support portion combined with an upper side of the fiber filter material, and a lower support portion combined with a lower side of the fiber filter material, and a filter control portion having a cylinder and a piston ascending and descending in the cylinder, the upper support portion being ascended and descended while the fiber filter material is pressed or relaxed with respect to the coarse filter as the piston is ascended and descended, thereby controlling pores of the fiber filter material.

[0029] Inventive Effects

[0030] According to the present application, the filter control portion having the piston ascending and descending for pressing and relaxing the fiber filter material is located inside the coarse filter, so that an additional space is not required to be equipped at an upper end of the filter tank or the like to arrange the filter control portion, and a filter layer height can be increased, thereby providing a more improved filter efficiency of increasing a filter area in a limited space to increase a treated water amount or improve a treatment performance, or the like.

[0031] Further, according to the present application, an air tightness can be improved and water leakage can be prevented by changing a flange type coupling structure between upper, middle, and lower housings of the filter tank to a gutter O-ring coupling structure.

[0032] Further, according to the present application, the filter tank is formed by a combination of an upper housing, at least one middle housing, and a lower housing, and a size and a filter capacity of the entire filter tank can be adjusted by adjusting the number of the middle housings. In particular, by employing the same coupling structure in the respective housings, assembly between the housings is easy and interchangeable, so that a production time in a stock keeping can be shortened by planned production.

[0033] Further, according to the present application, by employing a more improved coupling structure between the filter tank body and the filter tank door, an air tightness of the filter tank can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0034] Brief descriptions of the respective drawings are provided to more fully understand the drawings cited in the detailed description of the present application.

[0035] Figure 1 is a partial cross-sectional view of a filter device according to an embodiment of the present application.

[0036] Figure 2 is a view for explaining a coupling structure between housings of a filter tank according to an embodiment of the present application.

[0037] Figure 3 is a view for explaining a door of a filter tank according to an embodiment of the present application.

[0038] Figure 4 is a block diagram of a filtering system according to an embodiment of the present application. DETAILED DESCRIPTION

[0039] Hereinafter, exemplary embodiments according to the present application are described in detail with reference to the accompanying drawings. In addition, the configuration of embodiments of the present application and methods used are described in detail with reference to the accompanying drawings. The same reference numbers or symbols shown in each of the accompanying drawings indicate components or constituent elements that perform substantially the same functions. The up, down, left, and right directions in the following description are based on the accompanying drawings for convenience, and the scope of the present application is not necessarily limited to the corresponding directions.

[0040] Terms including ordinal numbers such as first, second, etc. can be used to describe various constituent elements, but the constituent elements are not limited by the terms. The terms are used only for the purpose of distinguishing one constituent element from another. For example, a first constituent element can be named a second constituent element, and similarly, a second constituent element can be named a first constituent element, without departing from the scope of the present application. The terms including and / or mean that the combinations of the associated items or any one of the associated items exist.

[0041] The terms used in the present specification are used to describe the embodiments, and are not intended to limit and / or to define the present application. The singular representation also includes the plural representation, unless the context clearly dictates otherwise. In the present specification, it is understood that the term including or having means that the presence of features, numbers, steps, actions, constituent elements, components, or combinations thereof described in the specification is designated, but is not intended to exclude the possibility of presence or addition of one or more other features or numbers, steps, actions, constituent elements, components, or combinations thereof in advance.

[0042] Throughout the specification, when it is mentioned that a certain part is connected with other parts, it includes not only the case of direct connection, but also the case of indirect connection with other elements interposed therebetween. In addition, when the specification mentions that a certain part includes certain constituent elements, it means that other constituent elements can be further included, unless there is a special description to the contrary, rather than excluding other constituent elements.

[0043] Figure 1 is a partial cross-sectional view of a filtering device according to an embodiment of the present application.

[0044] Reference Figure 1 The filtering device 1000 can include a filtering tank 100, a strainer 200, a filtering part 300, and a filtering control part 400.

[0045] The filter tank 100 is in fluid communication with the outside, and can accommodate a coarse filter 200, a filter portion 300, and a filter control portion 400. The upper portion of the filter tank 100 can be connected with a raw water inflow pipe 510 and a backwash water discharge pipe 520, and the lower portion can be connected with a treated water discharge pipe 530, a backwash water inflow pipe 550, and a backwash air inflow pipe 540.

[0046] Specifically, in the filtration process, raw water can flow into the filter tank 100 through the raw water inflow pipe 510, and be discharged through the treated water discharge pipe 530 after being filtered by the filter portion 300 and the coarse filter 200. In addition, in the backwash process, treated water can flow into the filter tank 100 from the backwash water inflow pipe 550, and be discharged to the backwash water discharge pipe through the coarse filter 200 and the filter portion 300. At this time, air flows into the filter tank 100 from the backwash air inflow pipe 540, thereby improving the backwash efficiency.

[0047] The coarse filter 200 is disposed in the filter tank 100, is formed in the length direction of the filter tank 100, and is formed with a plurality of water passage holes on at least the side surface. In addition, the lower side of the coarse filter 200 can be in communication with the treated water discharge pipe 530 and the backwash water inflow pipe 550. The treated water flowing in through the fiber filter material and the water passage holes can be discharged through the treated water discharge pipe 530.

[0048] In the embodiment, a receiving space recessed downward from the upper side can be formed in the coarse filter 200 to accommodate at least a portion of the filter control portion 400 (particularly, the cylinder 410, etc.). That is, by disposing the filter control portion 400 inside the coarse filter 200, compared to the case where the filter control portion 400 is located on the upper side of the filter tank 100, the overall space of the filtration system can be reduced.

[0049] In the embodiment, the open surface of the receiving space can be shielded by a sealing plate combined with the upper end of the coarse filter 200. The sealing plate can be formed with a passage for the at least a portion of the filter control portion 400 (particularly, the piston 420, etc.) to ascend and descend.

[0050] In the embodiment, the coarse filter 200 can be configured in a plurality. For example, the coarse filter 200 can include a first portion coarse filter 210 on the lower side and a second portion coarse filter 220 located on the upper side of the first portion coarse filter 210. At this time, the first portion coarse filter 210 can be fixedly disposed, and the second portion coarse filter 220 ascends and descends with respect to the first portion coarse filter 210 and changes the overall length of the coarse filter 200. A portion can be disposed in overlap. Particularly, the second portion coarse filter 220 can be combined to the piston 420, thereby ascending and descending in conjunction with the ascent and descent of the piston 420.

[0051] The filter part 300 is provided outside the rough filter 200 and forms a filter pore, so that raw water flowing into the filter tank 100 can be filtered. The treated water produced by filtering the raw water can flow into the rough filter 200.

[0052] Specifically, the filter part 300 can include a fiber filter material 310, an upper side support part 320, and a lower side support part 330. The fiber filter material 310 can form a filter pore layer on the outer circumferential surface of the rough filter 200. The upper side support part 320 is located at the upper side of the rough filter 200 and can be combined with the upper side of the fiber filter material 310. The lower side support part 330 is located at the lower side of the rough filter 200 and can be combined with the lower side of the fiber filter material 310. By combining the fiber filter material 310 by the upper side support part and the lower side support part, the fiber filter material 310 can be arranged in the length direction of the rough filter 200.

[0053] In an embodiment, at least one of the upper side support part 320 and the lower side support part 330 can be directly or indirectly combined with the piston 420 and / or the cylinder 410 of the filter control part. Accordingly, at least one of the upper side support part 320 and the lower side support part 330 can be linked with the piston 420 and be raised and lowered. For example, the piston 420 is combined with the second part rough filter 220, the second part rough filter 220 is combined with the upper side support part 320, so that the raising and lowering of the piston 420 can be transmitted to the upper side support part 320 through the second part rough filter 220. Differently, for example, the piston 420 can be combined with the second part rough filter 220 and the upper side support part 320, respectively, so that the raising and lowering of the piston 420 is transmitted to the second part rough filter 220 and the upper side support part 320, respectively.

[0054] The filter control part 400 can control the pore of the fiber filter material 310. Specifically, by raising and lowering at least one of the upper side support part 320 and the lower side support part 330, the fiber filter material 310 surrounding the rough filter 200 is squeezed or relaxed, so that the filter pore can be adjusted.

[0055] For example, the filter control part 400 raises the upper side support part 320 at the time of the filtration process, so that the fiber filter material 310 can be squeezed to form a filter pore. In addition, for example, the control part lowers the upper side support part 320 at the time of the backwashing process, so that the fiber filter material 310 can be relaxed. The relaxed fiber filter material 310 is strongly flowed by the backwashing water sprayed from the rough filter 200 and the backwashing air rising from the lower part, so that it can be easily cleaned.

[0056] In an embodiment, the filter control part 400 can have a cylinder 410 disposed inside the rough filter 200 and a piston 420 raised and lowered in the cylinder 410. The cylinder 410 can be fixedly disposed in the accommodation space inside the rough filter 200, and the piston 420 can be moved up and down in the cylinder 410.

[0057] In this embodiment, the piston 420 can move up and down within the cylinder 410, and the rod of the piston 420 can be fixedly attached to the filter tank 100 (specifically, the cover of the filter tank 100). Therefore, as the piston 420 moves up and down, the cylinder 410 can move up and down relative to it. At this time, the upper support and / or a portion of the coarse filter 200 (e.g., the second portion of the coarse filter 220) are directly or indirectly attached to the moving cylinder 410, thus allowing them to move up and down in conjunction with the cylinder.

[0058] In an embodiment, when multiple coarse filters 200 are configured, the cylinder 410 and / or piston 420 of the filter control unit 400 can be coupled to one of the coarse filters 200 (e.g., the second coarse filter 220). Therefore, when the piston 420 rises and falls, the second coarse filter 220 and the upper support 320 can rise and fall simultaneously.

[0059] In this embodiment, an open area is formed at the upper end of the filter tank 100, and a cover may be provided on the upper side of the open area. The filter control unit 400 can be installed or removed through the open area. In addition, the piston 420 can be fixedly attached to the cover.

[0060] In this embodiment, the filter control unit 400 may further include an air pipe 430. The air pipe 430 is connected to the cylinder 410 in a communicative manner, and can eliminate negative or positive pressure within the cylinder 410. Specifically, when the piston 420 descends relative to the cylinder 410, a positive pressure is generated on the lower side of the cylinder 410, and a negative pressure is generated on the upper side. Similarly, when the piston 420 rises relative to the cylinder 410, a negative pressure is generated on the lower side of the cylinder 410, and a positive pressure is generated on the upper side. The air pipe 430 is connected to both the upper and lower sides of the cylinder 410 and communicates with the outside, thereby eliminating negative or positive pressure. Thus, the piston 420 can smoothly rise and fall while maintaining a seal between the cylinder 410 and the coarse filter 200.

[0061] Figure 1 The filter device 1000 shown is exemplary, and it can be configured in various ways depending on the embodiment of the invention. Furthermore, Figure 1 None of the components shown are essential components of the filter device 1000. According to an embodiment, the filter device 1000 can be composed of... Figure 1 The filter device 1000 can be implemented with more components than the components shown, and the filter device 1000 can also be made of more components than Figure 1 The components shown are achieved with fewer components.

[0062] Figure 2 This is a diagram illustrating the inter-shell connection structure of the filter tank according to an embodiment of the present invention.

[0063] Referring to Figure 2 , the filter tank 100' can include a plurality of housings 110, 120, 130, 140. Specifically, the filter tank 100' can include an upper housing 110, middle housings 120, 130, and a lower housing 140. That is, by changing the number of the middle housings 120, 130, the overall size and length of the filter tank 100' can be easily adjusted.

[0064] The first coupling structure is applied to the lower end of the upper housing 110 and the lower end of the middle housings 120, 130, respectively, the second coupling structure is applied to the upper end of the lower housing 140 and the upper end of the middle housings 120, 130, respectively, and the filter tank 100' can be assembled by coupling between the first coupling structure and the second coupling structure.

[0065] That is, the first coupling structure is identically applied to the lower end side of each of the housings 110, 120, 130, and the second coupling structure is identically applied to the upper end side of each of the housings 120, 130, 140, so that the position change or exchange of the housings 110, 120, 130, 140 can be easily achieved.

[0066] In an embodiment, the first coupling structure can include a first protrusion 121 protruding to the downward side. Correspondingly, the second coupling structure can include a first recess 131 bent to surround the first protrusion 121. The air tightness of the filter tank 100' can be maintained by the close contact of the first protrusion 121 and the first recess 131 as described above.

[0067] Additionally, a first sealing part 122 of an elastic material can be provided between the first protrusion 121 and the first recess 131. The first sealing part 122 can be, for example, an O-ring of an elastic material. But it is not limited thereto.

[0068] In an embodiment, the first coupling structure can further include an upper fastening part 123 formed to extend from one side of the first protrusion 121. Correspondingly, the second coupling structure can further include a lower fastening part 132 formed to extend from one side of the first recess 131.

[0069] At this time, at least one first threaded part can be threadedly coupled through the upper fastening part 123 and the lower fastening part 132. For example, the first threaded part can be a bolt 133, and a nut 124 can be provided on one of the upper fastening part 123 and the lower fastening part 132 to assemble.

[0070] Figure 2 The filter device 100' shown in the middle is exemplary, and various configurations can be employed according to the embodiment to which the present application is applied. AlthoughFigure 2 Two intermediate housings 120, 130 are shown in the middle, but the number of intermediate housings can be less or more according to embodiments Figure 2 The number of intermediate housings shown in the middle can be less or more. Also, in the middle, only the coupling between the intermediate housing 120 and the intermediate housing 130 is shown, but the coupling can be equally applied to the coupling of other components employing the first coupling structure and the second coupling structure. Figure 2 The number of intermediate housings shown in the middle can be less or more. Also, in the middle, only the coupling between the intermediate housing 120 and the intermediate housing 130 is shown, but the coupling can be equally applied to the coupling of other components employing the first coupling structure and the second coupling structure.

[0071] Figure 3 FIG. 1 is a view for explaining a filter tank according to an embodiment of the present application.

[0072] Referring to FIG. 1, a filter tank 100 can include a filter tank body 150 and a filter tank door 160. Figure 3

[0073] The filter tank body 150 is in fluid communication with the outside, and an internal space can be formed to accommodate a pre-filter 200, a filter 300, and a filter control part 400. At this time, the filter tank body 150 can be formed with an open area on at least one side for the pre-filter and the fiber filter material, etc., to go in and out, etc. The filter tank door 160 can be coupled to the filter tank body 150 to open and close the open area.

[0074] In an embodiment, a second protrusion 151 can be formed along the circumference of the open area and toward the filter tank door 160 in the filter tank body 150. Correspondingly, a second recess 161 can be formed in the filter tank door 160 so as to surround the second protrusion 151. The filter tank 100 can be airtight by the close contact of the second protrusion 151 and the second recess 161.

[0075] Additionally, a second sealing part 152 of an elastic material can be provided between the second protrusion 151 and the second recess 161. The second sealing part 152 can be, for example, an O-ring of an elastic material. But it is not limited thereto.

[0076] In an embodiment, a door fastening part 162 can be formed extending from one side of the second recess 161. At least one second threaded part can be threaded through the door fastening part 162 and coupled to the filter tank body 150. For example, the second threaded part can be a bolt 163, and a nut 153 can be provided on the surface of the filter tank body 150 to assemble.

[0077] Figure 3 The filter device 100 shown in the middle is exemplary, and various configurations can be employed according to applications of embodiments of the present application.

[0078] Figure 4 FIG. 1 is a view for explaining a filter tank according to an embodiment of the present application.​

[0079] Referring to Figure 4 , the filtration system 2000 can include the pipe mixer 1100 and the filtration devices 1000-1, 1000-2, 1000-N.

[0080] The front end of the pipe mixer 1100 can be connected with the raw water pipe, and the rear end is connected with the filtration devices 1000-1, 1000-2, 1000-N through the raw water inflow pipe. When the raw water flows from the raw water pipe, the pipe mixer 1100 can mix the coagulant in the raw water and deliver it to the filtration devices 1000-1, 1000-2, 1000-N at the rear end.

[0081] That is, after the coagulant is instantaneously mixed in the raw water and the coagulation particles (floc) grow by the pipe mixer 1100, the filtration process is performed in the filtration devices 1000-1, 1000-2, 1000-N, so that the filtration efficiency can be improved.

[0082] Here, the pipe mixer 1100 is a device in which a partition wall is formed inside a pipe body so that water flows with a flow rate and can collide multiple times, and the raw water mixed with the coagulant can be mixed by colliding with the partition wall during passing through the inside of the pipe mixer 1100. That is, in the pipe mixer 1100, the raw water containing the coagulant is instantaneously mixed by the impact of colliding with the partition wall while the floc particles can grow instantaneously, and the micro fiber filter material can also filter micro floc having a particle size of about 5 um. That is, the coagulation particles can be easily and quickly formed by the pipe mixer 1100, without the need for a long time to mature in a coagulation tank to form large particles, and also micro particles can be filtered, so that the filtration treatment can be directly performed without the need to be equipped with a sedimentation tank. Therefore, in the filtration system 2000, there is no need to be equipped with a configuration for coagulant mixing such as a coagulation tank and a sedimentation tank.

[0083] In addition, for this purpose, the filtration devices 1000-1, 1000-2, 1000-N can be configured in plurality and connected in parallel at the rear end of the pipe mixer 1100 and the front end of the treated water discharge pipe, directly or indirectly.

[0084] As described above, the embodiments are illustrated by the defined embodiments and drawings, but as long as the person of ordinary skill in the corresponding technical field, various modifications and variations can be implemented from the above description. For example, even if the described technology is executed in a different order from the described method, and / or the described system, structure, device, circuit, etc. constituent elements are combined or combined in a different form from the described method, or are replaced or replaced by other constituent elements or equivalents, appropriate results can be achieved. In addition, each embodiment can be combined and used with each other as needed. Therefore, other implementations, other embodiments, and equivalents of the claims also fall within the scope of the appended claims.

Claims

1. A filtration device, in, include: The filter tank has a raw water inlet pipe and a backwash water outlet pipe connected at the top, and a treated water outlet pipe, a backwash water inlet pipe, and a backwash air inlet pipe connected at the bottom. A coarse filter is installed inside the filter tank, with multiple water passage holes formed on its side, and its lower side is connected to the treated water discharge pipe. A filtration section includes a fiber filter media, an upper support section, and a lower support section. The fiber filter media forms a pore layer on the outer peripheral surface of the coarse filter. The upper support section is coupled to the upper side of the fiber filter media, and the lower support section is coupled to the lower side of the fiber filter media. The filtration control unit includes a cylinder disposed inside the coarse filter and a piston that moves up and down relative to the cylinder. As the piston moves up and down, the upper support portion moves up and down, causing the fiber filter media to be squeezed or relaxed relative to the coarse filter, thereby controlling the pore size of the fiber filter media. A downward recessed receiving space is formed on the upper side of the coarse filter to accommodate the cylinder, and the open surface of the receiving space is covered by a sealing plate that is connected to the upper end of the coarse filter.

2. The apparatus according to claim 1, wherein, The piston rod is fixedly connected to the filter tank, the cylinder is connected to the upper support, and the upper support moves up and down under the action of the cylinder which moves up and down relative to the piston.

3. The apparatus according to claim 1, wherein, The coarse filter includes a first coarse filter section and a second coarse filter section that changes the overall length of the coarse filter section while being raised and lowered above the first coarse filter section. The second coarse filter section is coupled to the piston and moves up and down in conjunction with the piston.

4. The apparatus according to claim 3, wherein, The upper end of the piston is fixedly connected to the filter groove, and the cylinder is connected to the second part of the coarse filter. Under the action of the cylinder, which is raised and lowered relative to the piston, the second part of the coarse filter and the upper support part supported by the second part of the coarse filter are raised and lowered.

5. The apparatus according to claim 1, wherein, The filter tank includes an upper shell, at least one intermediate shell, and a lower shell. A first connecting structure is adopted at the lower end of the upper shell and the lower end of the middle shell, and a second connecting structure is adopted at the upper end of the lower shell and the upper end of the middle shell, so that the filter tank is assembled by the combination of the first connecting structure and the second connecting structure.

6. The apparatus according to claim 5, wherein, The first connecting structure includes a first protrusion protruding downwards, and the second connecting structure includes a first recess formed by bending around the first protrusion. A first sealing part of elastic material is provided between the first protrusion and the first recess, and the airtightness of the filter tank is maintained by the tight contact between the first protrusion and the first recess.

7. The apparatus according to claim 6, wherein, The first coupling structure further includes an upper fastening portion extending from one side of the first protrusion, and the second coupling structure further includes a lower fastening portion extending from one side of the first recess, wherein at least one first threaded component passes through the upper fastening portion and the lower fastening portion for threaded engagement.

8. The apparatus according to claim 1, wherein, The filter tank includes: The filter tank body has an open area formed on one side, and The filter tank door is combined with the filter tank body and seals the open area; A second protrusion is formed on the filter tank body along the periphery of the open area, and the second protrusion is formed toward the filter tank door. A second recess is formed on the filter tank door by bending around the second protrusion. A second sealing part of elastic material is provided between the second protrusion and the second recess. The airtightness of the filter tank is maintained by the close contact between the second protrusion and the second recess.

9. The apparatus according to claim 8, wherein, A door fastening portion extends from one side of the second recess, and at least one second threaded component passes through the door fastening portion and is threadedly engaged with the filter tank body.

10. A filtration system, wherein, include: The filtration device according to any one of claims 1 to 9, and A pipeline mixer mixes coagulant with raw water flowing into the raw water pipe connected to the front end of the pipeline mixer. The raw water then connects to the filtration device via a raw water inlet pipe connected to the rear end of the pipeline mixer. The filtration devices are configured in multiple units and connected in parallel to the rear end of the pipeline mixer.

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