Fan-shaped filter element and fan-shaped filter housing using the same

Abstract

The present application provides a fan-shaped filter element for reducing the size of a filter element for filtering a large amount of liquid industrial material, and accurately and reliably estimating whether it is suitable for use, a use limit time (life cycle, filter life), or a limit amount such as filter performance using only a small amount of the liquid industrial material. A fan-shaped filter element (1d) is a cylindrical actual-use filter element (1) that filters a liquid to be filtered from the outer periphery (5a) side to the inner cavity (6) side, is shortened by being cut in the direction of the cylindrical center axis (C-C) of the filter element in the direction of the perpendicular plane (H1, H2) of the filter element, and is divided into a fan shape in a radial plane (V1, V2) containing the cylindrical center axis (C-C), and the cut surface (3d, 3d') in the direction of the perpendicular plane (H1, H2) and the division surface (V1, V2) in the direction of the radial plane (V1, V2) of the fan-shaped filter element (1d) are sealed so that the liquid does not leak.

Description

Technical Field

[0001] The present invention relates to a fan-shaped filter element, a fan-shaped filter element housing using the test piece thereof, and an evaluation method for a filter element using the fan-shaped filter element housing, wherein the fan-shaped filter element is used to miniaturize the filter element of the filter element for performance testing, thereby extrapolating the performance of the filter element for evaluation. Background Technology

[0002] Various industrial liquid raw materials, especially high-purity liquid raw materials for electronic products such as photoresists and various functional coatings, beverage raw materials such as mineral water, tea, and coffee, liquid chemical raw materials such as coatings, inks, and pure water, abrasive raw materials used in chemical mechanical polishing (CMP), and liquid raw materials used in the manufacture of precision electrical machinery parts such as laminated ceramic capacitors, flat panel displays, and batteries, are processed into filter elements and filter cartridges to filter out impurities and foreign objects larger than a specified diameter, thus becoming homogeneous and high-quality raw materials for use in the next process.

[0003] Filter elements used as filtration materials for small-volume liquid feedstocks, such as industrial liquid feedstocks, utilize non-woven fabrics, membranes, etc., formed into disc shapes, or are made by processing standard filter cartridges into miniature, encapsulated filter elements. For filter elements used in small-volume filtration, it is advisable to test the disc filter or capsule filter to determine the appropriate selection based on the actual volume of liquid to be filtered before use.

[0004] On the other hand, filter elements for industrial liquid raw materials used in mass production and for large-volume applications mainly use: cylindrical deep-layer filter elements, such as nonwoven laminate filter elements with a hollow, cylindrical open-cell core material in resin or metal wound with nonwoven fabric in a roll, or wire-wound filter elements with threads wound in the core material; and cylindrical pleated filter elements, which are pleated and wound in the core material to increase the filtration area of ​​nonwoven fabric, membrane, or metal mesh. These filter elements are selected from a large pool of candidates based on the size of the foreign matter to be removed on the production line, the properties of the target liquid, and the target filtration capacity. The appropriate filter material, shape, and number of elements are selected.

[0005] Filter cartridges 10, mass-produced for filtering large quantities of industrial liquid raw materials, typically include... Figure 8 As shown, the mainstream types are cartridge-type and capsule-type. In the cartridge-type, the cartridge 10 is housed in a filter housing 100 consisting of a metal housing 101 with an air vent 14 for air discharge and a housing base 102, which can be replaced. In the capsule-type, the cartridge 10 is housed in a resin capsule (not shown) and integrated into one unit.

[0006] Such a filter element 10 consists of a filter element 1 surrounding and covering an inner core 6a with numerous openings, and further surrounded by an opening cover (not shown) to prevent deformation of the filter element 1, as needed. Liquid raw material is injected into the housing cover 101 from the inlet 13 of the housing base 102 as shown in F1, pressurized to the filter element 10, and filtered by allowing the liquid raw material to pass through to the inner core 6a side. Then, as shown in F2, it flows out from the outlet 16 and is supplied to a predetermined process. The filter element 10 typically has an outer diameter of [missing information]. 60-80mm, the maximum is It is about 130mm long and the total length is 1 to 40 inches, especially 10 to 40 inches.

[0007] In actual production lines, one filter element is typically used to filter several to over ten tons of industrial liquid raw materials per batch.

[0008] If a filter selection test is conducted on a real-scale production line in mass production, a huge amount of actual liquid is required. Therefore, evaluations are usually conducted using a small number of filters, where the filter material of the filter element of the test subject is punched into a disc shape and processed into a single-layer structure. Alternatively, evaluations are conducted using small-scale filter elements, about a fraction of the length of the test element, ranging from 1 to 5 inches in length.

[0009] However, filter selection tests using only a single layer of filter media in the filter element of a filter cartridge cannot reproduce the effects of filter cartridge manufacturing on the filter element, such as the compaction of the filter material and non-woven fabric used in the filter element, and changes in the flow path caused by the shape. Therefore, the reproducibility for mass production is poor. On the other hand, filter selection tests using small filter cartridges for small-scale selection tests, although scaled down, sometimes have to filter industrial liquid raw materials in the tonnes.

[0010] Therefore, improvements are desired to further reduce the size of the filter element while maintaining a state close to that of the filter cartridge used in mass production, so as to conduct selection tests on a laboratory scale.

[0011] On the other hand, Patent Document 1 discloses a scaling tool for reproducing the filtration characteristics of a large-scale filtration device. The scaling tool includes: a housing having a liquid inlet and a liquid outlet; and a filter receiving area in liquid communication with the liquid inlet and the liquid outlet, configured to house a membrane having one or more pleats. The filter receiving area is defined by a rigid wall structure configured to retain the one or more pleats of the membrane and compress the pleats in an effective amount capable of proportionally reproducing the filtration performance of the large-scale filtration device. While this scaling tool can evaluate the performance of pleated filter elements, it is not suitable for evaluating the performance of deep-layer filter elements. Existing technical documents Patent documents

[0012] Patent Document 1: Japanese Patent Application Publication No. 2023-19871 Summary of the Invention The problem that the invention aims to solve

[0013] This invention was made to solve the above-mentioned problems, and its purpose is to provide a fan-shaped filter element, a fan-shaped filter element housing using the fan-shaped filter element, and an evaluation method for a filter element using the fan-shaped filter element housing. The fan-shaped filter element reduces the size of deep-layer filter elements, pleated filter elements, etc., which filter large quantities of liquid industrial raw materials, so that for any type of filter element, only a small amount of the target liquid industrial raw material is used, the filtration performance such as suitability for use, service limit time (life cycle, filtration life) or limit quantity can be accurately and reliably predicted. Methods for solving problems

[0014] To achieve the above objectives, a fan-shaped filter element is a cylindrical, practically usable filter element that allows the liquid to be filtered to flow from the outer periphery to the inner cavity side. It is either exposed along the central axis of the cylinder in the direction of the vertical plane of the filter element, or shortened by cutting it in the vertical plane, and divided into a fan shape on the radial plane containing the central axis of the cylinder. The fan-shaped filter element is characterized in that the cut surface along the vertical plane and the divided surface along the radial plane are sealed to prevent leakage of the liquid.

[0015] The fan-shaped filter element can be: the cut surface and each surface of the segmented surface are heat-fused to the filter element receiving part inside the shell, the gaps are filled with a sealant, the gaps are bonded with an adhesive, the gaps are sealed with a sealant, and / or it is heat-fused to the plate and sealed.

[0016] In the fan-shaped filter element, the filter element can be a wound filter element, a deep pleated filter element, a pleated filter element, or a deep filter element.

[0017] In the fan-shaped filter element, for example, the filling material, the adhesive material, the sealant and / or the plate body are the same material as the resin nonwoven fabric or the adhesive material and / or the resin that constitutes the filter element.

[0018] The fan-shaped filter element, for example, is shortened to 1 / 10 to 1 / 50 of the actual 10-inch length of the filter element in use, and the included angle between the segmented surfaces is less than 360°, preferably 30° to 90°.

[0019] The fan-shaped filter element can be: the opening on the tapered front end of the plate body is liquid-tightly joined to a sealing base that is disc-shaped and has a through hole in the center.

[0020] The fan-shaped filter element may have a thick bottom extending from the bottom side of the sealing base, and an O-ring with a diameter larger than the cylindrical diameter of the thick bottom is wound around the thick bottom.

[0021] The fan-shaped filter cartridge housing, completed to achieve the above-mentioned objective, is characterized in that the fan-shaped housing body and the housing cover are liquid-tightly integrated. The fan-shaped housing body has: an inner filter cartridge receiving portion, in which the fan-shaped filter cartridge is embedded and housed; and an inflow and outflow opening for the liquid, which are opened in the inner filter cartridge receiving portion and are respectively opposite to the outer peripheral side and the inner cavity side of the fan-shaped filter cartridge. The housing cover covers the fan-shaped housing body, seals the openings, and has an injection port for injecting liquid flowing from the outer peripheral side of the fan-shaped filter cartridge to the inner cavity side.

[0022] The fan-shaped filter cartridge housing can be: the cut surface and each surface of the segmented surface are thermally fused to the filter cartridge receiving part inside the housing, the gaps are filled with a sealant, the gaps are bonded with an adhesive, the gaps are sealed with a sealant, and / or it is thermally fused to the plate and sealed.

[0023] The fan-shaped filter housing can be: the opening on the tapered front end of the plate body is liquid-tightly joined to a disc-shaped sealing base with a through hole in the center.

[0024] The fan-shaped filter housing may have a thick bottom extending from the bottom side of the sealing base, and an O-ring with a diameter larger than the cylindrical diameter of the thick bottom is wound around the thick bottom, and the thick bottom and the O-ring are liquid-tightly embedded in the fan-shaped housing body together.

[0025] A method for manufacturing a fan-shaped filter element housing to achieve the above-mentioned objective is characterized by comprising the following steps: a cylindrical filter element, from which the liquid to be filtered flows from the outer periphery to the inner cavity, is kept exposed in a vertical plane direction perpendicular to the cylindrical central axis of the filter element, or is cut and shortened along the vertical plane direction of the filter element; and is further divided into fan shapes by cutting along a radial plane containing the cylindrical central axis; the exposed vertical plane or the cut surface along the vertical plane direction, and the divided surface along the radial plane direction are sealed to prevent leakage of the liquid, thereby manufacturing the fan-shaped filter element. The process includes: preparing a fan-shaped housing body and embedding the fan-shaped filter element into the filter element receiving portion inside the housing for storage; the fan-shaped housing body having: the filter element receiving portion inside the housing for embedding and storing the fan-shaped filter element; and an inflow opening and an outflow opening for the liquid, which open in the filter element receiving portion inside the housing and are respectively opposite to the outer peripheral side and the inner cavity side of the fan-shaped filter element; preparing a housing cover and sealing the fan-shaped housing body with the housing cover to form an integral unit; the housing cover covering the fan-shaped housing body, sealing the opening, and having an injection port for injecting liquid flowing from the outer peripheral side to the inner cavity side of the fan-shaped filter element.

[0026] The manufacturing method of the fan-shaped filter element housing may be as follows: heat-melting the cut surface and each surface of the segmented surface to the filter element receiving part inside the housing, filling the gap with a sealant, bonding with an adhesive, sealing with a sealant, and / or heat-melting to the plate body to achieve sealing.

[0027] The method for evaluating a filter element to achieve the above objectives is a method using a fan-shaped filter cartridge housing to evaluate the filter element, comprising the following steps: a step of allowing liquid to be filtered by the filter element to flow into the fan-shaped filter cartridge housing from the inlet and out from the outlet opening, thereby performing filtration; and a step of collecting the filtrate of the liquid to be filtered from the fan-shaped filter cartridge, or measuring the pressure difference caused by the liquid to be filtered, i.e., the difference between the pressure on the inlet side (primary pressure) and the pressure on the outlet side (secondary pressure) of the filter element, the filtration time, and / or the volume of the filtrate, to evaluate the performance of the filter element with the volume of the filtrate increased to the usage amount. The effects of the invention

[0028] The aforementioned fan-shaped filter element can be used to evaluate the filtration performance of any type of filter element, such as deep-layer filter elements or pleated filter elements, which are actually used for filtering large quantities of liquid industrial raw materials.

[0029] Based on the fan-shaped filter element, the actual use of deep-layer filter elements and pleated filter elements are shortened by dividing them in the vertical direction of the filter element along the central axis of the cylinder, and further reduced in size by dividing them into fan shapes on the radial surface containing the central axis of the cylinder. Therefore, even if a large amount of industrial raw materials for liquids are not filtered, and only a small amount is used, the filtration performance such as whether the filter element is suitable for use, the limit of use time or the limit of use can be accurately and reliably extrapolated and estimated.

[0030] Therefore, by using the aforementioned fan-shaped filter element, it is possible to use a smaller amount of industrial raw materials for the target liquid, and to efficiently estimate and evaluate the filtration performance of actual deep-bed and pleated filter elements on a small scale with a smaller actual liquid volume. This is not only economical and less wasteful, but also improves operability, thereby contributing to the achievement of time-saving and sustainable development goals (SDGs).

[0031] Based on the fan-shaped filter cartridge housing and its manufacturing method, filtration performance can be estimated and evaluated on a small scale through efficient, accurate, and reliable extrapolation. Furthermore, this fan-shaped filter cartridge is formed by cutting out a portion of a mass-produced filter cartridge, thus enabling the evaluation of filtration performance for various deep-layer and pleated filter elements with different diameters, cylinder lengths, or types and materials of filter elements.

[0032] Based on the evaluation method of the filter element using the filter cartridge, it is possible to extrapolate and predict accurately and reliably. Therefore, it is possible to effectively re-evaluate and select filter elements to achieve optimization with less actual liquid. Thus, it is possible to not only improve the efficiency of the production line for the raw materials used in the target liquid industry and the final products using the raw materials, but also to improve quality and reliability, and increase production efficiency, production speed and yield. Attached Figure Description

[0033] Figure 1 This is a schematic perspective view showing the state in which the fan-shaped filter element of the present invention is cut out from the filter element of the filter element. Figure 2 This is an exploded perspective view of the fan-shaped filter cartridge housing using the present invention. Figure 3 This is an exploded perspective view of other fan-shaped filter cartridge housings using the present invention. Figure 4 This is a graph showing the correlation between the time taken for the test liquid to be filtered to pass through and the applied pressure when using a fan-shaped filter housing with the fan-shaped filter element as an example of the present invention, and a commercially available conventional filter element (manufactured by ROKI TECHNO Co., Ltd.; LPA capsule) as a reference example, which does not apply the present invention. Figure 5 This refers to a performance test filter element using a commercially available existing filter element (manufactured by ROKI TECHNO Co., Ltd.; LPA capsule) that does not apply the present invention, and a laminated filter element (existing miniaturized element) that does not apply the present invention, serving as a comparative example. (25mm), a graph showing the difference in reproducibility between existing filter cartridges and existing miniaturized elements regarding the time and pressure required to pass the test liquid to be filtered. Figure 6 This refers to a performance test filter element using a commercially available existing filter element (manufactured by ROKI TECHNO Co., Ltd.; LPA capsule) that does not apply the present invention, and a laminated and compressed filter element (existing miniaturized element) that does not apply the present invention, serving as another comparative example. A graph showing the difference in reproducibility between existing filter cartridges and existing miniaturized filter media compression test specimens for a 25mm filter media compression test specimen, considering the time and pressure required to pass the test liquid to be filtered through. Figure 7 This refers to a performance test filter element using a commercially available, existing filter element (manufactured by ROKI TECHNO Co., Ltd.; LPA capsule) that does not apply the present invention, and a laminated and compressed filter element (existing miniaturized element) that does not apply the present invention, serving as another comparative example. A graph showing the difference in reproducibility between existing filter cartridges and existing miniaturized filter media compression leak-proof treatment samples obtained by compressing the filter media and applying leak-proof treatment to the end face after the filter media is compressed (25mm) to obtain the sample. When the test liquid to be filtered passes through the sample, the graph shows the difference in reproducibility between the sample and the test liquid with time and pressure, as well as the difference in time and pressure. Figure 8 This is a partial exploded cross-sectional view showing the outline of a filtration device that encapsulates an existing filter element into an existing filter housing and filters the liquid to be filtered. Detailed Implementation

[0034] The following describes in detail the methods for carrying out the present invention, but the scope of the present invention is not limited to these methods.

[0035] Reference Figure 1 The fan-shaped filter element 1d using the present invention will be described below. Figure 1 An example is shown of a sector-shaped filter element 1d obtained from the filter element 1 used in practice.

[0036] like Figure 1As shown in (d), the fan-shaped filter element 1d is used to evaluate the filtration performance of the deep-layer filter element 1 for liquids. The cut surfaces 3d and 3d' along the vertical planes H1 and H2 and the dividing surfaces 4d and 4d' along the radial planes V1 and V2 of the fan-shaped filter element 1d are heat-fused together, filled with sealant, bonded with adhesive, sealed with sealant, and / or sealed with a plate to prevent liquid leakage.

[0037] like Figure 1 As shown in (a), the filter element 1 is a cylindrical filter element that is wound around and covered on the outer periphery of a hollow cylindrical perforated inner core 6a with an inner cavity 6. If necessary, the outer periphery can also be covered by a perforated cover (not shown). The exposed surfaces of the nonwoven fabric 2 on the upper and lower end faces of the cylindrical element are heat-fused together, filled with a sealant, bonded with an adhesive, sealed with a sealant made of thermoplastic resin of the same material as the nonwoven fabric 2, and / or sealed with a plate.

[0038] Filter element 1 is a deep filtration element with wound threads, a deep filtration element consisting of layers of nonwoven fabric wound in a manner that makes nonwoven fabric such as meltblown fabric roll up, or a deep pleated filtration element in which nonwoven fabric or membrane is shaped into pleats to increase the surface area per unit volume.

[0039] The fan-shaped filter element 1d is made from the actual filter element 1 with the perforated inner core 6a and the perforated cover removed.

[0040] The fan-shaped filter element 1d is cut to a thickness Lb by forming cut surfaces 3b and 3b' in the vertical directions H1 and H2 along the cylindrical central axis CC of the filter element 1, and is shortened into a cylindrical short body 1b of the filter element while maintaining the outer periphery 5b and the inner cavity surface 6b (see reference). Figure 1 (b) is divided into fan-shaped sections on radial surfaces V1 and V2 containing the central axis CC of the cylinder, with cut surfaces 3c and 3c' corresponding to cut surfaces 3b and 3b', along the dividing surfaces 4c and 4c' of the radial surfaces V1 and V2, the outer peripheral arc surface 5c corresponding to the outer periphery 5b, and the inner cavity arc surface 6c corresponding to the inner cavity surface 6b, forming a fan-shaped cut body 1c with the same thickness Lb and Lc (refer to...). Figure 1(c) The cut surfaces 3d and 3d' corresponding to the cut surfaces 3c and 3c' are heat-fused and / or bonded to the fan-shaped plates 7d and 7d' extending further toward the central axis CC than the cut surfaces 3d and 3d', and are also heat-fused and / or bonded to the rectangular plates 8d and 8d' extending further toward the central axis CC than the cutting surfaces 4d and 4d' corresponding to the cutting surfaces 4c and 4c', thereby allowing the liquid to flow leak-free from the outer peripheral arc surface 5d corresponding to the outer peripheral arc surface 5c to the inner cavity arc surface 6d corresponding to the inner cavity arc surface 6c (as an example, refer to the use of plates 7d, 7d' and plates 8d and 8d'). Figure 1 (d)

[0041] The material of plates 7d, 7d' and 8d, 8d' can be the same as or different from the material of the filter element actually used, but it is preferred to be the same.

[0042] Instead of sealing the cut surfaces 3d, 3d' and the segmented surfaces 4d, 4d' with plates 7d, 7d' and 8d, 8d', they can also be heat-fused to the fan-shaped shell body 23, filled with caulking material, bonded with adhesive material, and sealed with sealant (not shown).

[0043] The filter element 1 is used according to the object and purpose of filtration. Regarding the material of the filter element 1, in the case of a deep-layer filter element in which the open-pore core material is wound in a roll shape with nonwoven fabric, examples include nonwoven fabrics formed by spunbonding, meltblowing, or hydroentangling. In the case of a deep-layer filter element in which the open-pore core material is finally wound in a cylindrical shape with filaments, examples include filaments such as twisted yarns or untwisted yarns. In the case of a pleated filter element in which the open-pore core material is finally pleated in a cylindrical shape with nonwoven fabric, membrane, or metal mesh to increase the filtration area, examples include nonwoven fabrics, woven fabrics, and meshes, as well as membranes such as porous membranes. Examples of nonwoven, woven, mesh, yarn, and membrane materials include: polyolefin resins such as polyethylene and polypropylene; fluoropolymers such as polytetrafluoroethylene, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-ethylene copolymer, polyvinylidene fluoride, polychlorotrifluoroethylene, and chlorotrifluoroethylene-ethylene copolymer; polyesters such as polyethylene terephthalate; acrylic resins such as polymethyl methacrylate; thermoplastic resins such as polysulfone, polyethersulfone, polyphenylene ethersulfone, polyphenylene sulfide, polyacetal, polyvinyl alcohol, polystyrene, polycarbonate, and polyamide. The filter element 1 can also be made of inorganic materials such as glass fiber or diatomaceous earth. Filter element 1 can also be a metal filter such as stainless steel.

[0044] Furthermore, when the cut surfaces 3d and 3d' of the fan-shaped filter element 1d are heat-fused to the fan-shaped housing body 23 as described later, the heat-fusion is achieved by making the material of the filter element 1 a thermoplastic resin. Additionally, when the cut surfaces 3d and 3d' and the segmented surfaces 4d and 4d' are filled with a sealant or sealed to the fan-shaped housing body 23 with a sealant, the sealant or sealant can be a resin-based sealant or sealant of the same material as the filter element 1. Particularly preferred are the raw materials forming the filter element, such as resins, filter membranes, or filaments, especially the aforementioned thermoplastic materials.

[0045] While the thickness Ld of the fan-shaped filter element 1d is more important than its volume, the filter elements actually used in filter element 1 are mostly 1 to 40 inches in length. Therefore, when converting to a length of 10 inches, it is preferable to shorten the length to 1 / 10 to 1 / 50. If the absolute value is less than 5 mm, it may be impossible to perform processing such as heat welding on the cut surfaces 3d and 3d' and the segmented surfaces 4d and 4d'.

[0046] In the fan-shaped filter element 1d, the included angle θ between the dividing surfaces 4d and 4d' is less than 360°, preferably more than 30° and less than 180°, more preferably 30° to 90°, for example 45°.

[0047] The fan-shaped filter element 1d can be manufactured in the following manner.

[0048] First, prepare a cylindrical filter element 1 (refer to) for evaluation, which will allow the liquid to be filtered to flow from the outer periphery 5a side to the inner cavity 6 side, i.e., the inner core 6a side. Figure 1 (a)). For example, an example of shortening the deep-layer filter element 1 will be given.

[0049] The filter element 1 is cut along vertical planes H1 and H2, which are perpendicular to its cylindrical central axis CC. This shortens the length of the filter element 1 by 1 / 10 to 1 / 50 of its total length L (10 inches), resulting in a cylindrical short body 1b (see reference). Figure 1 (b)

[0050] Next, the radial surface containing the central axis CC of the cylinder is divided such that the included angle θ between the radial surfaces V1 and V2 is 30° to 90°, for example, divided into 1 / 8 sections with an included angle θ of 45°, thereby obtaining a sector-shaped cut-off body 1c (see reference). Figure 1 (c)).

[0051] Next, the cut surfaces 3d and 3d' are sealed with the segmented surfaces 4d and 4d' by heat fusion and / or bonding using plates 7d, 7d' and 8d, 8d', thereby producing the fan-shaped filter element 1d (see reference). Figure 1(d)

[0052] Additionally, the fan-shaped filter element 1d shows the process of cutting out the filter element 1 to create the cylindrical short body 1b (see reference). Figure 1 In the example of (b), however, in the case of a shorter filter element 1 in actual use, if the thickness Ld is about 5 mm or more when converted to 1 / 10 to 1 / 50 of a 10-inch length, it can be unlike... Figure 1 Cut out and divide into fan shapes as in (b) (see reference) Figure 1 (d)

[0053] Next, refer to Figure 2 The fan-shaped filter housing 20 using the fan-shaped filter element 1d will be described.

[0054] The fan-shaped filter element housing 20 integrates the fan-shaped filter element housing body 23 with the housing cover 21 covering the fan-shaped filter element housing body 23 in a liquid-tight manner, and the fan-shaped filter element housing body 23 is embedded in and houses the fan-shaped filter element 1d.

[0055] The fan-shaped housing body 23, although not particularly limited in shape, may be, for example, an inverted frustum shape that tapers towards the bottom or an inverted quadrangular frustum shape, with a flange 27 on the upper large diameter side, and an inner filter element storage part 24 that can be inserted into and accommodate the fan-shaped filter element 1d.

[0056] The housing contains a filter element housing 24 for embedding a fan-shaped filter element 1d. This housing contains a filter element housing 24 that can contact the plates 7d, 7d', and 8d, 8d' of the fan-shaped filter element 1d. The housing contains a filter element housing 24 with filter element housing sides 24a and 24a', with a thickness Ld of the fan-shaped filter element 1d (refer to...). Figure 1 The widths of (d) are parallel to each other; the side surfaces 24b and 24b' of the filter element storage portion inside the housing are inclined with respect to the included angle θ in such a way that they can connect with the dividing surfaces 4d and 4d' of the fan-shaped filter element 1d; and the bottom surface 24c of the filter element storage portion forms the bottom of the filter element storage portion 24 inside the housing, which is formed as a trapezoidal column that narrows downward.

[0057] The fan-shaped housing body 23 has: an inflow opening 25, which is open upward on the large-diameter side of the inverted square pyramid shape of equal thickness and faces downward opposite to the bottom surface 24c of the filter element storage part, allowing liquid to flow in; and an outflow opening 26, which penetrates the bottom surface 24c of the filter element storage part and allows liquid passing through the fan-shaped filter element 1d to flow out, and is narrower than the opening 9 on the tapered front end side of the plates 7d, 7d' and 8d, 8d' of the fan-shaped filter element 1d, and faces the opening 9.

[0058] The openings 9 on the tapered front ends of the plates 7d, 7d', 8d, and 8d' of the fan-shaped filter element 1d are flat and are sealed with a gasket or other sealing material to improve the sealing between the plate and the bottom surface 24c of the filter element housing, so that the liquid passing through the fan-shaped filter element 1d will not leak. Instead of sealing the openings 9 on the tapered front ends with the bottom surface 24c of the filter element housing, the plates 7d, 7d', 8d, and 8d' of the fan-shaped filter element 1d can also be sealed with the filter element housing sides 24a (not shown), 24a', 24b, and 24b' of the filter element housing 24 inside the housing.

[0059] The filter element housing 24 inside the housing has a sufficient depth to prevent the fan-shaped filter element 1d from protruding from the inflow opening 25 when it is embedded, and has a sufficient bottom area for the opening 9 for supporting the tapered front end sides of the plates 7d, 7d' and 8d, 8d'.

[0060] The flange 27 of the fan-shaped housing body 23 and the housing cover 21 are formed to have the same diameter, thereby making the flange 27 and the housing cover 21 liquid-tightly integrated by clamping bands (not shown).

[0061] The fan-shaped housing body 23 may have a circular groove 28 on the large diameter side face to the flange 27 for inserting a rubber gasket 29 (pad) so that liquid does not leak from the fan-shaped filter housing 20.

[0062] On the other hand, the housing cover 21 is a generally disc-shaped structure with approximately the same diameter as the flange 27 of the fan-shaped housing body 23. The housing cover 21 has an inlet 22 formed by an inlet pipe through the center for liquid to flow in, and can be connected to the filter cartridge housing 24 inside the housing.

[0063] When the fan-shaped filter cartridge housing 20 is embedded and houses the fan-shaped filter cartridge 1d, the fan-shaped housing body 23 and the housing cover 21 covering the fan-shaped housing body 23 are fastened together by clamping straps, screws, or fusion welding, thereby achieving a liquid-tight integration, and are used in the evaluation method of filter elements.

[0064] The fan-shaped housing body 23 and housing cover 21 of the fan-shaped filter cartridge housing 20 can be made of resin or metal.

[0065] In addition, if the fan-shaped filter element 1d does not have plates 7d, 7d' and 8d, 8d', the cut surfaces 3d, 3d' and the dividing surfaces 4d, 4d' can be directly connected to the filter element storage side surfaces 24a and 24a' and 24b and 24b' for bonding and / or heat fusion.

[0066] Next, refer to Figure 3 For other types of fan-shaped filter housings 20 using fan-shaped filter element 1d and Figure 2 The differences will be explained.

[0067] Figure 2 In the fan-shaped filter housing 20 shown, the filter housing 24 inside the housing is recessed into an inverted frustum or an inverted quadrangular frustum shape to allow the fan-shaped filter 1d to be embedded. The openings 9 on the tapered front end side of the plates 7d, 7d', 8d, and 8d' of the fan-shaped filter 1d are in close and liquid-tight contact with the bottom surface 24c of the filter housing. on the other hand, Figure 3 In the fan-shaped filter cartridge housing 20 shown, the filter cartridge receiving portion 24 inside the housing is recessed in the shape of a mortar, i.e., an inverted frustum. The opening 9 on the tapered front end side of the fan-shaped filter cartridge 1d is engaged with a sealing base 9a. The sealing base 9a is a disc-shaped structure with a through hole 9d and a flange 9c extending out with a diameter slightly larger than the diameter of the opening 9. On the lower side of the sealing base 9a, a sealing protrusion 9b is integrated with and extends from the sealing base 9a. The diameter of the sealing protrusion 9b is slightly smaller than that of the sealing base 9a and is cylindrical, and an O-ring 9e is wound around it. The thick bottom 23a of the filter cartridge receiving portion 24 inside the fan-shaped housing body 23 has a large-diameter recess 24d1 and a small-diameter recess 24d2 that are recessed and penetrated in such a way that the sealing base 9a and the sealing protrusion 9b are respectively embedded.

[0068] Next, continue to refer to Figure 2 The evaluation method for filter element 1 is described, but... Figure 3 The same applies to China.

[0069] First, prepare the fan-shaped filter housing 20, which has a fan-shaped filter element with the same cross-sectional structure made of the same material as the filter element 1 to be studied.

[0070] When the test liquid to be filtered by the filter element 1 is injected from the inlet 22 of the housing cover 21, the test liquid enters the fan-shaped housing body 23 as shown by the thick arrow PassA, is filtered through the fan-shaped filter element 1d in the filter element storage part 24 of the housing as shown by the thick arrow PassB, and is discharged from the outlet 26 as shown by the thick arrow PassC.

[0071] When the number of filter elements 1 and the required flow rate for filtration in the actual production line are determined, the flow rate for a small-scale test can be calculated based on the volume ratio of filter element 1 to sector filter element 1d, and it can be determined whether various filter types can pass through at the specified flow rate. Furthermore, when the flow rate is determined but the filter type and number are not, the filter type can be determined based on the evaluation data of the sector filter element, and the number of filters required to pass through the specified flow rate can be calculated.

[0072] The flow rate of the actual production line can be calculated based on the flow rate of the sector filter element 1d (the flow rate up to the specified pressure difference). The sector filter element 1d is homogeneous with the filter element 1 of the filter device in the actual production line, so the filtrate is the same as that in the actual production line, and the filtrate quality (particle removal efficiency) can also be confirmed.

[0073] According to the evaluation method of this filter element, regardless of the filter element, its material, quality, or manufacturer, the filtration performance can be extrapolated efficiently, accurately, and reliably, and estimated and evaluated on a small scale. Therefore, it has high versatility, which helps to improve workability and shorten time.

[0074] The liquids to be filtered are not particularly limited if they are industrial liquid raw materials. Examples include beverages such as mineral water, tea, coffee, and black tea; purified water such as industrial pure water, ion-exchange water, and RO water; organic liquids such as edible oil, kerosene, gasoline, lubricating oil, organic solvents, resin adhesives, thermosetting resins, and photoresists; and various liquid raw materials such as paints, inks, rinsing solutions, slurries, metal pastes, and glass pastes. Example

[0075] Hereinafter, embodiments applying the present invention, as well as reference examples and comparative examples not applying the present invention, will be described in detail.

[0076] (Example 1: Comparison between existing miniaturized evaluation products and the fan-shaped filter element 1d of the present invention) A prototype fan-shaped filter element was developed for use in evaluating filter elements. The filter element being evaluated is a cylindrical filter element manufactured by ROKI TECHNO Co., Ltd., specifically the 10-inch product model 250L-SLF-003 (0.3μm depth filter). As an existing product for miniaturization evaluation (Comparative Object 1), a 1-inch size Labo-Pure LPA capsule manufactured by ROKI TECHNO Co., Ltd. was used, which incorporates a cylindrical filter element of the existing shape. On the other hand, as an embodiment using a fan-shaped filter element 1d, the aforementioned cylindrical filter element 1 is cut into 10mm sections along its entire length (see reference). Figure 1 (b)), and cut it into 45° sectors (see reference). Figure 1 (c)), and the cut surfaces 3d, 3d' and the segmented surfaces 4d and 4d' are sealed by heat fusion with plates 7d, 7d' and 8d, 8d' (see reference). Figure 1 (d)), thus obtaining the sector-shaped filter element 1d. This sector-shaped filter element is then sealed into the sector-shaped filter element housing 20 (refer to...). Figure 2 ), used for evaluation. In addition, the LPA capsule is made of PP resin, and the fan-shaped filter cartridge housing 20 has a cap made of SUS and a body made of acrylic resin. For the two samples, Comparative Object 1 and Example 1, PL-10H manufactured by Fuso Chemical Industry Co., Ltd. was used as the test solution. When the flow rate was 1:200 mL / min for the Comparative Object and 1d:13 mL / min for the sector filter element of Example 1, the pressure difference increase for each sample was as follows: Figure 4 As shown.

[0077] Depend on Figure 4 It can be seen that the pressure-time graph of the fan-shaped filter element housing 20 using the fan-shaped filter element 1d of Embodiment 1 of the present invention, which represents the process of pressurization, is approximately the same as that of the conventional Labo-Pure LPA. Both show a tendency for the pressure to gradually increase due to clogging, and the time to reach the limit of non-filtration is approximately the same. This indicates that, since the fan-shaped filter element 1d of Embodiment 1 is cut and manufactured from the filter element under study, the performance of the filter element 1 can be accurately and reliably extrapolated and predicted. In addition, it is shown that performance evaluations equivalent to those of the conventional Labo-Pure LPA can be performed.

[0078] (Comparative Example 1: Comparison of existing miniaturized evaluation products with existing limited-quantity evaluation technologies (1)) The filter element being evaluated is a cylindrical filter element manufactured by ROKI TECHNO Co., Ltd., specifically product model 250L-SLS-005 (0.5μm depth type). As an existing product for miniaturization evaluation (Comparative Object 2), a 1-inch size Labo-Pure LPA capsule manufactured by ROKI TECHNO Co., Ltd. was used, which incorporates a cylindrical filter element of the existing shape. On the other hand, as a comparative example 1, the existing limited evaluation techniques (of which 1) use cutting the constructed nonwoven fabric into individual pieces. The sample is 25mm thick and is formed by overlapping the filter elements that constitute the evaluation object. Otherwise, the measurements were performed in the same manner as in Example 1. For both Comparative Object 2 and Comparative Example 1, PL-10H manufactured by Fuso Chemical Industry Co., Ltd. was used as the test solution. When the flow rate was 200 mL / min for Comparative Object 2 and 70 mL / min for Comparative Example 1 (using the existing small-volume evaluation technique (1)), the pressure difference increase for each sample was as follows: Figure 5 As shown.

[0079] Depend on Figure 5It can be seen that, compared with the LPA capsule which contains a filter element composed of filter media in a compacted state, Comparative Example 1 is made of the same material as the LPA capsule, but it is only overlapped. Therefore, the filter media is not compacted and the rolling pressure of the filter element cannot be reproduced. As a result, impurities cannot be captured, no blockage occurs, and the pressure difference does not increase.

[0080] (Comparative Example 2: Comparison of existing miniaturized evaluation products with existing small-scale evaluation technologies (Part 2)) The same existing miniaturized evaluation product as Comparative Example 1 (Comparative Object 2) was used. On the other hand, as a comparative example of the few existing evaluation techniques (the second one), the nonwoven fabric is cut into individual pieces. Samples were made by overlapping 25mm pieces according to the number of filter elements constituting the evaluation object, compressing and compacting the filter media to achieve a filter layer thickness of the same degree as the filter element. For both Comparative Object 2 and Comparative Example 2, PL-10H manufactured by Fuso Chemical Industry Co., Ltd. was used as the test solution. When the flow rate was 200 mL / min for Comparative Object 2 and 70 mL / min for Comparative Example 1 (using the existing small-volume evaluation technique, Part 2), the pressure difference increase for each sample was as follows: Figure 6 As shown.

[0081] Depend on Figure 6 It can be seen that in Comparative Example 2, where filter media compaction was applied, the applied pressure was higher than that of Comparative Example 2 over time. Leakage from the end face of the filter media was observed during the process, and the pressure difference reached its limit. It is speculated that this is because, by compression, the particle capture accuracy is improved compared to Comparative Example 2, thus enabling the capture of finer particles, which begins to clog and the pressure difference increases. However, the pressure gradually rises excessively, causing the filtrate to short-circuit from the end face of the filter media, resulting in the pressure difference reaching its limit.

[0082] (Comparative Example 3: Comparison of existing miniaturized evaluation products with existing small-scale evaluation technologies (3)) The same existing miniaturized evaluation product as Comparative Example 1 (Comparative Object 2) was used. On the other hand, as a comparative example of the few existing evaluation techniques (the third one), the nonwoven fabric is cut into pieces. The sample was obtained by overlapping the filter elements that constitute the comparison object at a thickness of 25mm, compressing and compacting the filter media to achieve the same thickness as the built-in filter, and then treating the end face of the filter media with anti-leakage measures by filling the gaps. For Comparative Object 2 and Comparative Example 3, PL-10H manufactured by Fuso Chemical Industry Co., Ltd. was used as the test solution. When the flow rate was 200 mL / min for Comparative Object 2 and 70 mL / min for Comparative Example 3 (using the existing small-volume evaluation technique, Part 3), the pressure difference increase for each sample was as follows: Figure 7 As shown.

[0083] Depend on Figure 7 It can be seen that in Comparative Example 3, where filter media compaction was applied and leakage prevention measures were implemented, the pressurization pressure was higher than that of Comparative Example 2 over time. Although no leakage due to short-circuiting of the filter media end face was observed during the process, clogging was observed at an earlier stage than in Comparative Example 2, which was used as a benchmark LPA capsule type. The reason is speculated to be as follows. Actual LPA capsules vary the compression pressure for each layer, while Comparative Examples 2 and 3 only compress the entire capsule to the same thickness as the LPA capsule. Therefore, the compression method of each layer differs from the filter element built into the LPA capsule, where the liquid flow area decreases from the outer layer to the inner layer along the liquid flow path. In Comparative Examples 2 and 3, both the outer and inner layers are... The filter area is 25mm, so the calculated flow rate varies depending on the layer that contributes to the capture. Furthermore, in this case, the innermost filter area is considered, so the flow rate is set to 1 / 3.

[0084] These results show that, based on the fan-shaped filter housing 20 of the fan-shaped filter cartridge 1d of Example 1 of the present invention, by using the filter element evaluation method, it is possible to accurately and reliably extrapolate and evaluate the filtration performance such as suitability for use, usage limit time or limit volume using only 1 / 10 of the test liquid of Reference Example 1, thereby achieving reproducibility and evaluation performance equal to or better than that of conventional commercially available Labo-Pure LPA. Furthermore, it is known that previous limited experimental methods were used for single-layer filters such as pleated filters ( (25mm), which cannot reproduce filters with layers and thickness like deep-layer filters. In contrast, the fan-shaped filter element of the present invention can reproduce this. Industrial applicability

[0085] According to the evaluation method of the filter element of the fan-shaped filter housing 20 of the fan-shaped filter element of the present invention, it is possible to accurately and reliably extrapolate and evaluate the filtration performance of the filter element as the filter material for filtering industrial liquid raw materials, such as whether it is suitable for use, the limit of use time or the limit of use. Explanation of reference numerals in the attached figures

[0086] 1: Filter element; 1b: Short cylindrical body; 1c: Sector-shaped cut body; 1d: Sector-shaped filter element; 2: Non-woven fabric (end face); 3b, 3b': Cut surface; 3c, 3c', 3d, 3d': Cut surface; 4c, 4c': Segmented surface; 4d, 4d': Segmented surface; 5a: Outer periphery; 5b: Outer peripheral surface; 5c: Outer peripheral arc surface; 5d: Outer peripheral arc surface; 6: Inner cavity; 6a: Inner core; 6b: Inner cavity surface; 6c: Inner cavity arc surface; 6d: Inner cavity arc surface; 7d, 7d': Plate; 8d, 8d': Plate; 9: Opening on the tapered front end side; 9a: Sealing base; 9b: Sealing protrusion; 9c: Flange; 9d: Through hole; 9e: O-ring; 10: Filter element; 13: Inlet; 14: Vent opening; 16: Outlet; 20: Sector-shaped filter element 21: Shell; 22: Inlet; 23: Fan-shaped shell body; 23a: Thick bottom; 24: Filter element storage part inside the shell; 24a: Side of the filter element storage part; 24b: Side of the filter element storage part; 24c: Bottom surface of the filter element storage part; 24d1: Large diameter recess; 24d2: Small diameter recess; 25: Inflow opening; 26: Outflow opening; 27: Flange; 28: Groove; 29: Gasket; 100: Filter shell; 101: Shell cover; 102: Shell base; θ: Included angle; CC: Central axis of cylinder; H1: Vertical plane; H2: Vertical plane; F1: Flow path; F2: Flow path; L: Total length; Lb: Thickness; Lc: Thickness; Ld: Thickness; V1: Radial surface; V2: Radial surface; PassA, PassB, PassC: Flow.

Claims

1. A fan-shaped filter element, a cylindrical, practically usable filter element that filters liquid by allowing it to flow from the outer periphery to the inner cavity, wherein the filter element is either exposed along the central axis of the cylinder in the direction perpendicular to the vertical plane of the filter element, or is shortened and cut off in the direction perpendicular to the vertical plane of the filter element, and is divided into a fan-shaped shape on a radial surface containing the central axis of the cylinder, characterized in that... The cut surfaces of the fan-shaped filter element along the vertical plane and the segmented surfaces along the radial plane are sealed to prevent the liquid from leaking.

2. The fan-shaped filter element according to claim 1, characterized in that, The cut surface and each surface of the segmented surface are thermally fused to the filter element receiving part inside the shell, filled with a sealant, bonded with an adhesive, sealed with a sealant, and / or thermally fused to the plate and sealed.

3. The fan-shaped filter element according to claim 1, characterized in that, The filter element is a wire-wound filter element, a deep-pleated filter element, a pleated filter element, or a deep-layer filter element.

4. The fan-shaped filter element according to claim 1, characterized in that, The caulking material, the adhesive material, the sealant, and / or the plate body are the same material as the resin-based nonwoven fabric or fixing thread adhesive material and / or the resin constituting the filter element.

5. The fan-shaped filter element according to claim 1, characterized in that, The fan-shaped filter element, when converted to a 10-inch length relative to the actual filter element used, is shortened to 1 / 10 to 1 / 50, and the included angle between the segmented surfaces is 30° to 90°.

6. The fan-shaped filter element according to claim 2, characterized in that, The opening at the tapered front end of the plate is fluidly joined to a sealing base that is disc-shaped and has a through hole in the center.

7. The fan-shaped filter element according to claim 6, characterized in that, A thick base extends from the bottom side of the sealing platform, and an O-ring with a diameter larger than that of the cylinder of the thick base is wound around the thick base.

8. A fan-shaped filter cartridge housing, characterized in that, The fan-shaped filter cartridge housing integrates the fan-shaped housing body and the housing cover in a liquid-tight manner. The fan-shaped housing body has: an inner filter element receiving portion, in which the fan-shaped filter element of claim 1 is embedded and housed; and an inflow and outflow opening for the liquid, which are respectively opened in the inner filter element receiving portion and are opposite to the outer peripheral side and inner cavity side of the fan-shaped filter element. The housing cover covers the fan-shaped housing body, seals the opening, and has an injection port for injecting liquid flowing from the outer peripheral side of the fan-shaped filter element to the inner cavity side.

9. The fan-shaped filter housing according to claim 8, characterized in that, The cut surface and each surface of the segmented surface are thermally fused to the filter element receiving part inside the shell, filled with a sealant, bonded with an adhesive, sealed with a sealant, and / or thermally fused to the plate and sealed.

10. The fan-shaped filter housing according to claim 9, characterized in that, The opening at the tapered front end of the plate is fluidly joined to a disc-shaped sealing base with a central through hole.

11. The fan-shaped filter housing according to claim 10, characterized in that, A thick base extends from the bottom side of the sealing platform, and an O-ring with a diameter larger than the cylindrical diameter of the thick base is wound around the thick base. The thick base and the O-ring are liquid-tightly embedded in the fan-shaped housing body.

12. A method for manufacturing a fan-shaped filter element housing, characterized in that, It has the following processes: The process of manufacturing the fan-shaped filter element involves taking a cylindrical filter element from which the liquid to be filtered flows from the outer periphery to the inner cavity, keeping it exposed along a vertical plane perpendicular to the central axis of the filter element, or cutting and shortening it along the vertical plane of the filter element, and cutting it into a fan shape along a radial plane containing the central axis of the cylinder, and sealing the exposed vertical plane, the cut surface along the vertical plane, and the divided surface along the radial plane to prevent the liquid from leaking. The process of preparing a fan-shaped housing body and embedding the fan-shaped filter element into the filter element storage part inside the housing for storage, wherein the fan-shaped housing body has: the filter element storage part inside the housing, in which the fan-shaped filter element is embedded and stored; and the liquid inflow opening and outflow opening, which open in the filter element storage part inside the housing and are respectively opposite to the outer peripheral side and the inner cavity side of the fan-shaped filter element; as well as The process of preparing a housing cover and sealing the fan-shaped housing body with the housing cover to form an integral unit, the housing cover covering the fan-shaped housing body, sealing the opening and having an injection port for injecting liquid flowing from the outer peripheral side of the fan-shaped filter element to the inner cavity side.

13. The method for manufacturing the fan-shaped filter element housing according to claim 12, characterized in that, The cut surface and each surface of the segmented surface are heat-fused to the filter element receiving part inside the housing, the gaps are filled with sealant, the gaps are bonded with adhesive, the gaps are sealed with sealant, and / or heat-fused to the plate body to achieve sealing.

14. A method for evaluating a filter element, said evaluation method using the fan-shaped filter housing of claim 8 to evaluate the filter element, characterized in that, The evaluation method comprises the following steps: The process of filtering liquid that should be filtered by the filter element involves allowing the liquid to flow from the inlet into the fan-shaped filter cartridge housing and out from the outlet. as well as The process of collecting filtrate from the sector-shaped filter element, or measuring the pressure difference, filtration time, and / or filtrate volume caused by the liquid to be filtered, in order to evaluate the performance of the filter element when the volume is increased to the usage amount.

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