WO2014061740A1 - 水処理フィルター及びその製造方法 - Google Patents
水処理フィルター及びその製造方法 Download PDFInfo
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- WO2014061740A1 WO2014061740A1 PCT/JP2013/078192 JP2013078192W WO2014061740A1 WO 2014061740 A1 WO2014061740 A1 WO 2014061740A1 JP 2013078192 W JP2013078192 W JP 2013078192W WO 2014061740 A1 WO2014061740 A1 WO 2014061740A1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/001—Making filter elements not provided for elsewhere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/20—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
- B01D24/205—Downward filtration without specifications about the filter material supporting means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2055—Carbonaceous material
- B01D39/2058—Carbonaceous material the material being particulate
- B01D39/2062—Bonded, e.g. activated carbon blocks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28011—Other properties, e.g. density, crush strength
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
- B01J20/28019—Spherical, ellipsoidal or cylindrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28042—Shaped bodies; Monolithic structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
- B01J20/28057—Surface area, e.g. B.E.T specific surface area
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3007—Moulding, shaping or extruding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3021—Milling, crushing or grinding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
Definitions
- the present invention relates to a water treatment filter for removing harmful substances contained in purified water such as drinking water and tap water, and a method for producing the same.
- Patent Document 1 Japanese Patent No. 4064309
- Patent Document 2 Japanese Patent No. 4064309
- a water purifier was proposed in which a molded body integrally molded by a slurry suction method for sucking slurry was filled as a cartridge.
- Patent Document 2 As a filter capable of improving the removal of turbid components in addition to the removal of harmful substances such as trihalomethane, the applicant of the present application disclosed in WO 2011/016548 (Patent Document 2) with a center particle size of 80 to 120 ⁇ m.
- An activated carbon molding was proposed in which a mixture containing powdered activated carbon and a fibrous binder having a specific standard deviation in distribution was molded. This molded body is composed of free residual chlorine, volatile organic compound, CAT (2-chloro-4,6-bisethylamino-1,3,5-triazine) and 2-MIB (measured in JIS S3201 (2004)).
- 2-methylisoborneol is excellent in removal performance, and the filtration performance of turbid components is also improved compared to conventional activated carbon. Furthermore, this document states that if the molded body is compressed too much for shaping, the surface will be consolidated, so it should be kept to a minimum.
- an object of the present invention is to provide a water treatment filter having high dimensional accuracy and capable of improving filtration performance such as removal of turbid components and a method for producing the same.
- Another object of the present invention is to provide a water treatment filter having a removal performance of free residual chlorine, volatile organic compounds (such as trihalomethane) and turbid components, and having a high dimensional accuracy and yield with respect to a cylindrical housing, and a method for producing the same. There is to do.
- Another object of the present invention is to provide a water treatment filter having excellent filtration performance and high strength and a method for producing the same.
- the cylindrical water treatment filter is formed by sucking from the inside of the mold using a cylindrical mold for molding having a small hole for suction. It is manufactured by a slurry suction method in which a slurry is deposited on the surface. Therefore, it is difficult to uniformly mold the shape, size, and size of the outer surface of the obtained cylindrical filter.
- the surface was made uniform for compression. As described above, the present inventors have found that the filtration performance is lowered by the compression treatment (rolling treatment), and in order to improve the filtration performance, the surface is ground instead of the compression treatment to improve the dimensional accuracy.
- the present inventors have made extensive studies to achieve the above-mentioned problems. As a result, the present inventors have found that a cylindrical filter including granular activated carbon having a central particle diameter of 30 to 80 ⁇ m and a fibrillated fibrous binder is used. We found that the dimensional accuracy and filtration performance of the water treatment filter can be improved by adjusting the arithmetic mean waviness of the outer surface on the upstream side to 30 ⁇ m or less and the arithmetic mean height of the cross section curve to 35 to 45 ⁇ m, and the present invention was completed. did.
- the water treatment filter of the present invention is a water treatment filter provided with a cylindrical filter (A) containing granular activated carbon (a1) having a center particle diameter of 30 to 80 ⁇ m and a fibrillated fibrous binder (a2).
- the arithmetic average undulation of the outer surface upstream of the cylindrical filter (A) is 30 ⁇ m or less, and the arithmetic average height of the cross-sectional curve is 35 to 45 ⁇ m.
- the arithmetic average height of the inner surface on the downstream side of the cylindrical filter (A) may be 0.5 to 1.5 times the arithmetic average height of the outer surface.
- the outer surface of the cylindrical filter (A) may be a surface obtained by grinding without being compressed.
- the water treatment filter of the present invention is further inserted into the hollow portion of the cylindrical filter (A) and has a cylindrical filter (B1) containing granular activated carbon (b1) having a central particle diameter of 30 to 80 ⁇ m and a granular binder (b2). ) May be provided.
- the present invention includes a slurry preparation step of preparing a slurry by dispersing a mixture obtained by mixing granular activated carbon (a1) and fibrous binder (a2) in water, and filtering the preform while sucking the slurry.
- a suction filtration step for obtaining (A1) a drying step for obtaining a dried molded body (A2) by drying the preform (A1), and a grinding step for grinding the outer surface of the molded body (A2).
- a method for producing a water treatment filter according to claim 1 is also included.
- the grinding depth may be about 5 to 200 times the center particle diameter of the granular activated carbon (a1).
- the molded body (A2) may be rotated and ground.
- the production method of the present invention comprises a molding step for heating a mixture obtained by mixing granular activated carbon (b1) and granular binder (b2) to obtain a cylindrical filter (B), and a hollow part of the cylindrical filter (A).
- An insertion step of inserting the cylindrical filter (B) may be further included.
- the arithmetic average waviness of the outer surface on the upstream side of the cylindrical filter containing granular activated carbon having a central particle diameter of 30 to 80 ⁇ m and a fibrillated fibrous binder is 30 ⁇ m or less, and the arithmetic average height of the cross-sectional curve. Is adjusted to 35 to 45 ⁇ m, the dimensional accuracy and filtration performance of the water treatment filter can be improved. In particular, it has the ability to remove free residual chlorine, volatile organic compounds and turbid components, and has high dimensional accuracy and yield with respect to the cylindrical housing.
- FIG. 1 is a schematic perspective view showing an example of the water treatment filter of the present invention.
- FIG. 2 is a schematic perspective view showing an example of a grinding machine for producing the water treatment filter of the present invention.
- the water treatment filter of the present invention comprises a cylindrical filter (A) containing granular activated carbon (a1) having a central particle diameter of 30 to 80 ⁇ m and a fibrillated fibrous binder (a2).
- This cylindrical filter In (A) the outer surface is the upstream side of filtration, and the inner surface in the hollow portion is the downstream side of filtration.
- the outer surface of the cylindrical filter (A) is not subjected to compression treatment (rolling treatment), and is obtained by grinding. Therefore, the cylindrical filter obtained by the suction slurry method and the outer surface of the filter
- the filter has a predetermined surface characteristic different from that of a filter subjected to compression treatment. Therefore, it is excellent in dimensional accuracy, can be filled (accommodated) in a uniform housing with a high yield, and can improve filtration performance such as turbidity component removal performance.
- the arithmetic average waviness Wa of the outer surface of the cylindrical filter (A) is 30 ⁇ m or less (particularly 25 ⁇ m or less), for example, 1 to 30 ⁇ m, preferably 5 to 25 ⁇ m, more preferably 10 to 23 ⁇ m (particularly 15 to 20 ⁇ m).
- the arithmetic mean undulation exceeds 30 ⁇ m, the dimensional accuracy is lowered, so that it is difficult to mount (fill) the housing as a water treatment filter, and the yield is lowered.
- the mounting property to the housing if it is manufactured in a size smaller than the size of the housing in advance, the filtration performance and the like are lowered.
- the arithmetic average height Pa of the cross-sectional curve of the outer surface of the cylindrical filter (A) is 35 to 45 ⁇ m, preferably 36 to 44 ⁇ m (for example, 36 to 42 ⁇ m), more preferably 37 to 40 ⁇ m (particularly 37 to 40 ⁇ m). 39 ⁇ m). If the arithmetic average height is less than 35 ⁇ m, the gap between the granular activated carbons is narrowed, or turbid components are easily clogged. On the other hand, when the arithmetic average height exceeds 45 ⁇ m, the gap between the granular activated carbons becomes too wide, so that the turbid component removal performance is lowered.
- cylindrical filter (A) grinds the outer surface, the structure in the thickness direction and the uniformity of the packing density are high, and the uniformity of the surface structure of the outer surface and the surface structure of the inner surface is high.
- the arithmetic average waviness of the inner surface can also be selected from the same range as that of the outer surface, and is, for example, about 1 to 30 ⁇ m, preferably about 5 to 25 ⁇ m, more preferably about 10 to 23 ⁇ m (particularly about 15 to 20 ⁇ m).
- the arithmetic average waviness of the inner surface is, for example, about 0.5 to 2 times, preferably 0.8 to 1.8 times, and more preferably about 1 to 1.6 times the arithmetic average waviness of the outer surface. May be.
- the arithmetic average height of the inner surface can also be selected from the same range as that of the outer surface, for example, 35 to 45 ⁇ m, preferably 36 to 44 ⁇ m (eg 36 to 42 ⁇ m), more preferably 37 to 40 ⁇ m (particularly 37 to 39 ⁇ m). It is.
- the arithmetic average height of the inner surface is, for example, 0.5 to 1.5 times, preferably 0.6 to 1.4 times, more preferably 0.7 to 1 with respect to the arithmetic average height of the outer surface. It may be about 3 times (especially 0.8 to 1.2 times).
- the arithmetic average waviness and arithmetic average height can be measured using a non-contact type surface roughness measuring instrument in accordance with JIS B0601.
- the reason for using the non-contact type surface roughness measuring machine is that the hardness of the filter surface is small and the surface of the contact type measuring instrument is damaged by the stylus, making accurate measurement difficult.
- the magnification of the microscope of the non-contact type surface roughness measuring machine can be measured at 5 times.
- the evaluation length is close to the particle size of the granular activated carbon, so it is easy to measure the height of the granular activated carbon as the surface height, and if the magnification is too small, it will be close to the lower limit of the evaluation device and will vary. This is because the accuracy is reduced.
- the cutoff wavelength can be measured at 80 ⁇ m. This is because if the cut-off wavelength is not set, it is difficult to distinguish between waviness and roughness, and the measurement accuracy of waviness is reduced. Specifically, the arithmetic mean waviness and height can be measured by the method described in Examples described later.
- the center particle diameter of the granular activated carbon (a1) is 30 to 80 ⁇ m, preferably 30 to 60 ⁇ m, more preferably 35 to 55 ⁇ m (particularly 40 to 50 ⁇ m).
- the center particle diameter is less than 30 ⁇ m, clogging easily occurs due to turbid components.
- the center particle diameter exceeds 60 ⁇ m, the removal of turbid components decreases.
- the center particle diameter is a value measured by a laser diffraction / scattering method, and is a value of 50% diameter in the volume-based integrated fraction (when the integral volume is obtained from particles having a large volume particle size distribution ( D50).
- the measurement by the laser diffraction / scattering method can be performed by, for example, a wet particle size distribution measuring apparatus (“Microtrack MT3300” manufactured by Nikkiso Co., Ltd.).
- Granular activated carbon (a1) is obtained by carbonizing and / or activating a carbonaceous material.
- carbonization When carbonization is required, it can be carried out usually at a temperature of about 400 to 800 ° C., preferably about 500 to 800 ° C., more preferably about 550 to 750 ° C. while blocking oxygen or air.
- the activation method any of the gas activation method and the chemical activation method can be adopted, and the gas activation method and the chemical activation method may be combined. However, particularly when used for water purification, there are few impurities remaining. A gas activation method is preferred.
- a carbonized carbon material is usually used at, for example, 700 to 1100 ° C., preferably 800 to 980 ° C., more preferably about 850 to 950 ° C., and an activation gas (for example, water vapor, carbon dioxide gas, etc.) It can be performed by reacting with.
- an activation gas for example, water vapor, carbon dioxide gas, etc.
- a steam-containing gas containing 10 to 40% by volume of steam is preferable.
- the activation time and the temperature increase rate are not particularly limited, and can be appropriately selected depending on the type, shape, and size of the carbonaceous material to be selected.
- carbonaceous material for example, plant-type carbonaceous materials (For example, fruit shells, such as wood, sawdust, charcoal, a coconut shell, and a walnut shell, fruit seeds, pulp manufacture by-products, lignin, molasses etc.) Plant-derived materials), mineral carbonaceous materials (eg, peat, lignite, lignite, bituminous coal, anthracite, coke, coal tar, coal pitch, petroleum distillation residue, petroleum pitch, and other mineral-derived materials), synthetic resin systems Carbonaceous materials (for example, materials derived from synthetic resins such as phenolic resins, polyvinylidene chloride, acrylic resins), natural fiber based carbonaceous materials (for example, natural fibers such as cellulose, natural fibers such as regenerated fibers such as rayon) Material).
- plant-type carbonaceous materials for example, fruit shells, such as wood, sawdust, charcoal, a coconut shell, and a walnut shell, fruit seeds, pulp manufacture by-products, lignin,
- carbonaceous materials can be used alone or in combination of two or more.
- coconut shells and phenol resins are preferable because micropores related to the adsorption performance of volatile organic compounds defined in JIS S3201 (2010) are easily developed.
- Activated activated carbon may be washed to remove ash and chemicals, especially when plant-based carbonaceous materials such as coconut shells or mineral-based carbonaceous materials are used. Mineral acid and water are used for washing, and hydrochloric acid with high washing efficiency is preferable as the mineral acid.
- the granular activated carbon (a1) can have a BET specific surface area calculated by the nitrogen adsorption method in the range of about 600 to 2000 m 2 / g, for example, 800 to 1800 m 2 / g, preferably 900 to 1500 m 2 / g, more preferably Is about 1000 to 1300 m 2 / g. If the specific surface area is too large, the volatile organic compound is difficult to adsorb, and if it is too small, the removal performance of the volatile organic compound, CAT, and 2-MIB decreases.
- the fibrillated fibrous binder (a2) is not particularly limited as long as it is a pulp-like binder fiber that can be entangled with granular activated carbon by fibrillation using a high-pressure homogenizer or a high-speed disintegrator. It can be used widely regardless of whether it is synthetic or natural.
- the average fiber diameter of the fibrillated fibrous binder (a2) is, for example, about 0.1 to 50 ⁇ m, preferably about 1 to 20 ⁇ m.
- the average fiber length is, for example, about 0.5 to 4 mm, preferably about 1 to 2 mm.
- the proportion of the fibrillated fibrous binder (a2) is, for example, about 1 to 10 parts by weight, preferably 2 to 8 parts by weight, and more preferably about 3 to 7 parts by weight with respect to 100 parts by weight of the granular activated carbon (a1). is there.
- the thickness of the cylindrical filter (A) may be 5 mm or more. For example, 5 to 50 mm, preferably 5 to 5 mm depending on the size of the water purifier. It may be about 40 mm, more preferably about 5 to 30 mm. When the thickness is too thin, the filter characteristics are deteriorated and the uniformity between the outer surface and the inner portion is increased, so that the improvement effect by grinding is reduced.
- the hollow part (inner diameter part) of the cylindrical filter (A) is formed in a columnar shape along the axial center of the filter, and the diameter of the hollow part is, for example, 5 to 50 mm, preferably 8 to 30 mm, more preferably Is about 10 to 25 mm.
- the apparent density of the cylindrical filter (A) is, for example, about 0.1 to 1 g / cm 3 , preferably about 0.2 to 0.8 g / cm 3 , more preferably about 0.3 to 0.5 g / cm 3 . is there.
- the water treatment filter of the present invention comprises a cylindrical filter (A) 1 and a cylindrical filter (B) 2 inserted into the hollow part (inner diameter part) of the cylindrical filter (A). It may be a water treatment filter provided.
- the cylindrical filter (B) improves the strength of the cylindrical filter (A), has a function as a reinforcing material, and also has the ability to remove volatile organic compounds and turbid components.
- the cylindrical filter (B) includes granular activated carbon (b1) having a central particle diameter of 30 to 80 ⁇ m and a granular binder (b2), and the granular activated carbon is exemplified by the granular activated carbon exemplified in the section of the cylindrical film (A).
- (A1) can be used, and usually the same granular activated carbon as the granular activated carbon (a1) is used.
- the particulate binder (b2) may be formed of either a thermoplastic resin or a thermosetting resin.
- a polyolefin resin polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene- (meth) acrylic). Acid ester copolymer, ethylene- (meth) acrylic acid copolymer, etc.), styrene resin (polystyrene, etc.), acrylic resin, polyester resin, polyamide resin, polyurethane resin, epoxy resin, silicone resin
- the binder formed by these etc. can be illustrated.
- These granular binders can be used alone or in combination of two or more.
- thermoplastic resins are widely used from the viewpoint of moldability and the like, and binders formed of polyethylene are particularly preferable from the viewpoints of binding properties and heat resistance.
- the average particle diameter of the granular binder (b2) is, for example, about 0.1 to 200 ⁇ m, preferably about 1.0 to 100 ⁇ m, and more preferably about 5 to 30 ⁇ m from the viewpoint of excellent strength and moldability.
- the proportion of the granular binder (b2) is, for example, 7 to 35 parts by mass, preferably 8 to 30 parts by mass with respect to 100 parts by mass of the granular activated carbon (b1), considering the balance of water resistance, moldability, and the like. More preferably, it may be about 10 to 25 parts by mass.
- the thickness of the cylindrical filter (B) is, for example, about 1 to 10 mm, preferably 1.2 to 8 mm, and more preferably about 1.5 to 5 mm.
- the water treatment filter of the present invention may be used alone as the cylindrical filter (A), but may be combined with a reinforcing material for reinforcing the strength.
- a reinforcing material such as a netron pipe or a ceramic filter may be inserted into the hollow portion of the cylindrical filter (A).
- the filtration performance can be improved by increasing the amount of activated carbon in the water treatment filter.
- a combination with a cylindrical filter (B) is particularly preferred.
- the water treatment filter of the present invention may be equipped with a cap on the top of the cylindrical filter or a non-woven fabric on the outer surface and / or inner surface as necessary. Moreover, you may combine with a conventional nonwoven fabric filter, a ceramic filter medium, etc. Furthermore, the water treatment filter of the present invention may contain a conventional additive, for example, various adsorbents (such as lead adsorbent) and mineral additives. The ratio of the additive is, for example, about 1 to 20 parts by mass, preferably 3 to 15 parts by mass, and more preferably about 5 to 10 parts by mass with respect to 100 parts by mass of the granular activated carbon.
- the water treatment filter of the present invention is excellent in the filtration characteristics of purified water. Free residual chlorine, volatile organic compounds (such as trihalomethane) measured by JIS S3201 (2010), CAT (2-chloro-4, 6-Bisethylamino-1,3,5-triazine) and 2-MIB (2-methylisoborneol) removal performance, as well as turbidity component removal performance measured according to JIS S3201 (2010) Have.
- the cylindrical filter (A) includes a slurry preparation step of preparing a slurry by dispersing a mixture obtained by mixing granular activated carbon (a1) and a fibrous binder (a2) in water, and filtering the slurry while sucking the slurry.
- the granular activated carbon (a1) and the fibrous binder (a2) are dispersed in water so that the solid content concentration is 0.1 to 10% by mass (particularly 1 to 5% by mass).
- the solid content concentration of the slurry is too high, the dispersion tends to be non-uniform, and spots are likely to occur on the molded body.
- the solid content concentration is too low, not only the molding time is prolonged and the productivity is lowered, but also the density of the molded body is increased and the turbidity removal performance is liable to be lowered.
- suction filtration process molding is performed by putting a molding mold having a large number of holes in the slurry and filtering while sucking from the inside of the mold.
- a mold for molding for example, a conventional mold can be used.
- a mold described in FIG. 1 of Japanese Patent No. 3516811 can be used.
- a suction method a conventional method, for example, a suction method using a suction pump or the like can be used.
- the preform (A1) obtained in the suction filtration process is removed from the mold and dried with a dryer or the like, whereby the molded article (A2) can be obtained.
- the drying temperature is, for example, about 100 to 150 ° C. (especially 110 to 130 ° C.), and the drying time is, for example, about 4 to 24 hours (particularly 8 to 16 hours). If the drying temperature is too high, the fibrillated fibrous binder may be altered or melted to reduce the filtration performance or the strength of the molded body. If the drying temperature is too low, the drying time tends to be long or drying tends to be insufficient.
- the grinding step there is no particular limitation as long as the outer surface of the dried molded body (A2) can be ground (or polished), and a conventional grinding method can be used. From the viewpoint of grinding uniformity, the molded body (A2) itself A method of grinding by rotating is preferred.
- FIG. 2 shows an example of a grinding machine for rotating and grinding the molded body (A2) itself.
- the grinding machine 11 is installed on a rotary shaft 12, a disc-shaped grindstone 13 for grinding the molded body 20 (grinding stone particle size 90 to 125 ⁇ m), and a rotary shaft 17 for fixing and rotating the molded body 20.
- an operation panel 19 The disc-shaped grindstone 13 can be rotated by a motor 14 and can be relatively advanced and retracted so as to be able to contact the molded body 20 by an air cylinder 15 whose position is fixed, and the position is fixed.
- the air cylinder 16 is movable along with the rotary shaft 12 along the longitudinal direction or the axial direction of the molded body 20.
- the disc-shaped grindstone 13 contacts the outer surface of the molded body 20 and can grind the outer surface of the molded body, and also moves the outer surface of the molded body in the length direction to uniformly grind in the length direction. it can.
- the rotating shaft 17 can also be rotated by the motor 18 in the direction opposite to the disk-shaped grindstone. In this grinding machine, by rotating not only the molded body but also the disc-shaped grindstone, it is not necessary to remove the generated grinding rod for the uniformity of the grinding rod, and the productivity can be improved.
- the molded body 20 is mounted on a rotary shaft 15 installed in parallel to a disc-shaped grindstone 13 having a diameter of 305 mm ⁇ and a thickness of 19 mm installed on the rotary shaft 12, and a desired outer diameter (grinding is performed after grinding). Move it forward and backward to the depth and position.
- the grinding depth thickness to be ground
- the grinding depth is, for example, about 5 to 200 times, preferably about 10 to 100 times, more preferably about 15 to 50 times the center particle diameter of the granular activated carbon (a1). If the grinding depth is too small, the effect of grinding cannot be obtained, and if it is too large, the productivity decreases.
- productivity in consideration of the grinding depth, productivity can be improved by manufacturing a molded body (A2) having a predetermined thickness larger than the size of the housing in accordance with the size of the housing. Furthermore, the generation of grinding ridges due to grinding can be suppressed, and the generated grinding ridges may be reused.
- the peripheral speed of the disc-shaped grindstone is, for example, about 10 to 35 m / s, preferably about 15 to 32 m / s, and more preferably about 18 to 30 m / s.
- the rotational speed of the rotating shaft for rotating the disc-shaped grindstone is, for example, about 800 to 2200 rpm, preferably about 1000 to 2000 rpm, and more preferably about 1200 to 1800 rpm.
- the rotational speed of the rotating shaft for rotating the molded body may be, for example, about 200 to 500 rpm, preferably about 300 to 450 rpm. If the peripheral speed (rotational speed) is too small, the molded body tends to be crushed when grinding. On the other hand, if the peripheral speed is too high, the centrifugal force is too high, so that the molded body is easily deformed or crushed.
- a conventional grindstone can be used, and examples thereof include an alumina grindstone, a silicon carbide grindstone, and a combination of an alumina grindstone and a silicon carbide grindstone.
- the size of the abrasive grains is, for example, about 30 to 600 ⁇ m, preferably 40 to 300 ⁇ m, and more preferably about 45 to 180 ⁇ m.
- the abrasive grains are too rough, the granular activated carbon easily falls off from the ground surface. On the other hand, if it is too fine, it takes time to grind and the productivity tends to decrease.
- the grindstone and the molded body (A2) may be formed so as to be able to relatively move forward and backward in the directions approaching and separating, and at least one of the grindstone and the molded body may be formed to be able to advance and retract.
- the grindstone and the molded body (A2) need only be attached to the parallel axes, and at least one of the grindstone and the molded body may be formed so as to be movable (relatively movable) in the axial direction.
- the cylindrical filter (B) is obtained by a production method including a molding step in which a mixture obtained by mixing the granular activated carbon (b1) and the granular binder (b2) is heat-molded to obtain the cylindrical filter (B).
- the molding step it is preferable to manufacture the cylindrical filter (B) using dry molding.
- a mixer such as a Henschel mixer, a planetary mixer, or a V-type blender
- the injection molding method including a molding step can be used after the granular binder is melted or softened by heating the mold to a melting point or higher of the granular binder and then cooled and solidified.
- the obtained cylindrical filter (B) is subjected to an insertion process to be inserted into the hollow part of the cylindrical filter (A), whereby the water treatment filter of the present invention is obtained.
- the center particle diameter (D50) was measured by a laser diffraction / scattering method using a wet particle size distribution measuring apparatus ("Microtrack MT3000" manufactured by Nikkiso Co., Ltd.).
- Total THM removal performance The removal performance of total THM (trihalomethane) was measured in accordance with JIS S3201 (2010). However, the measurement was performed with the flow rate set at 3 liters / minute.
- Titanosilicate lead adsorbent “ATS” manufactured by BASF, average particle size 20 ⁇ m
- Fibrous binder “Fibrinated acrylic pulp Bi-PUL / F” manufactured by Nippon Exlan Industry Co., Ltd.
- Granular binder High-density polyethylene powder, “Miperon MP-200” manufactured by Mitsui Chemicals, Inc.
- Cylindrical non-woven fabric Non-woven fabric obtained by processing “9540F” manufactured by Shinwa Co., Ltd. into a cylindrical shape Spunbond non-woven fabric: “T0703WDO” manufactured by Unitika Ltd.
- the molding mold described in FIG. 1 of Japanese Patent No. 3516811 (tubular mold having a large number of suction holes) is used as a mold having an outer diameter of 40 mm ⁇ , an intermediate shaft diameter of 12 mm ⁇ , and an outer diameter of the gap of 180 mm.
- a cylindrical nonwoven fabric was mounted, and the slurry was only sucked and molded to the outer diameter of the mold of 40 mm ⁇ .
- the molded body is removed from the mold, dried, cut, and wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm (hereinafter, a molded body obtained by sucking slurry dispersed in water is wet molded. (Referred to as body).
- the weight of the molded body was 24.51 g.
- Comparative Example 2 A slurry is prepared in the same manner as in Comparative Example 1, and a cylindrical non-woven fabric is attached to a mold having an outer diameter of 40 mm ⁇ , an intermediate shaft diameter of 12 mm ⁇ , and an outer diameter wrinkle spacing of 180 mm, and after sucking the slurry, the surface reaches the mold outer diameter. After pressurizing and rotating (rolling), drying and cutting, a wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm was produced. The weight of the molded body was 28.52 g.
- a spunbond nonwoven fabric was wrapped around the outer periphery of this molded body in a single layer to obtain a test filter.
- Tables 1 and 2 show the evaluation results of the water treatment filter. Compared with Comparative Example 1, the turbid filtration capacity was 0.51 times.
- Comparative Example 3 A slurry is prepared in the same manner as in Comparative Example 1, and a cylindrical non-woven fabric is attached to a mold having an outer diameter of 40 mm ⁇ , a medium shaft diameter of 15 mm ⁇ , and an outer diameter wrinkle interval of 180 mm, and after sucking the slurry, the surface reaches the mold outer diameter.
- the resultant was subjected to pressure rotation molding, dried and then cut to prepare a wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 15 mm ⁇ , and a height of 54 mm.
- the weight of the molded body was 27.12 g.
- Comparative Example 4 A slurry was prepared in the same manner as in Comparative Example 1, and a cylindrical non-woven fabric was attached to a mold having an outer diameter of 40 mm ⁇ , an intermediate shaft diameter of 20 mm ⁇ , and an outer diameter of ⁇ spacing of 180 mm. The mixture was press-rotated, dried, and cut to prepare a wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 20 mm ⁇ , and a height of 54 mm. The weight of the molded body was 23.04 g.
- a spunbond nonwoven fabric was wrapped around the outer periphery of this molded body in a single layer to obtain a test filter.
- Tables 1 and 2 show the evaluation results of the water treatment filter. Compared with Comparative Example 1, the turbid filtration capacity was 0.51 times.
- Example 1 A slurry is prepared in the same manner as in Comparative Example 1, and a cylindrical non-woven fabric is attached to a mold having an outer diameter of 40 mm ⁇ , a middle shaft diameter of 12 mm ⁇ , and an outer diameter wrinkle spacing of 180 mm, so that the slurry is about 2 mm larger than the outer diameter of the mold. Only suction was performed and dried.
- the obtained molded body is mounted on the automatic grinding machine shown in FIG. 2 and molded at a molded body rotation speed of 300 rotations / minute, a grinding wheel rotation speed of 1200 rotations / minute, and a grinding wheel moving speed of 300 mm / 10 seconds (3 cm / second).
- the outer surface of the body was ground to produce a molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 180 mm. Further, it was cut to produce a wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm. The weight of the molded body was 24.93 g.
- a spunbond nonwoven fabric was wrapped around the outer periphery of this molded body in a single layer to obtain a test filter.
- Tables 1 and 2 show the evaluation results of the water treatment filter. Compared with Comparative Example 1, the turbidity filtration ability was improved by 1.2 times or more due to the effect of grinding, and compared with Comparative Example 2 by 2.3 times or more.
- Example 2 A slurry is similarly prepared with the same composition as in Comparative Example 1, and a cylindrical nonwoven fabric is mounted on a mold having an outer diameter of 40 mm ⁇ , a medium shaft diameter of 15 mm ⁇ , and an outer diameter wrinkle spacing of 180 mm, so that the slurry is about 2 mm larger than the outer diameter of the mold. Only suction was performed and dried.
- the outer surface of the molded body was ground with a grinder to produce a molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 15 mm ⁇ , and a height of 180 mm. Further, it was cut to produce a wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 15 mm ⁇ , and a height of 54 mm.
- the weight of the molded body was 23.80 g.
- a spunbond nonwoven fabric was wrapped around the outer periphery of this molded body in a single layer to obtain a test filter.
- Tables 1 and 2 show the evaluation results of the water treatment filter. Compared with the comparative example 3, the turbidity filtration ability improved by 1.8 times or more by the effect of grinding.
- Example 3 A slurry is similarly prepared with the same composition as in Comparative Example 1, and a cylindrical nonwoven fabric is mounted on a mold having an outer diameter of 40 mm ⁇ , an intermediate shaft diameter of 20 mm ⁇ , and an outer diameter wrinkle spacing of 180 mm, so that the slurry is about 2 mm larger than the outer diameter of the mold. Only suction was performed and dried.
- the outer surface of the molded body was ground with a grinder to produce a molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 20 mm ⁇ , and a height of 180 mm. Further, it was cut to prepare a wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 20 mm ⁇ , and a height of 54 mm. The weight of the molded body was 20.09 g.
- a spunbond nonwoven fabric was wrapped around the outer periphery of this molded body in a single layer to obtain a test filter.
- Tables 1 and 2 show the evaluation results of the water treatment filter. Compared with Comparative Example 4, the turbidity filtration ability was improved by 1.9 times or more due to the effect of grinding.
- Example 4 With respect to 6.8 kg of activated carbon small particles, 1.2 kg of granular binder was put into a mixer (“Micro Speed Mixer MS-25 type” manufactured by Takara Koki Co., Ltd.) and stirred for 2 minutes. The obtained mixture was filled into a cylindrical stainless steel mold with an inner diameter of 15 mm ⁇ , a core diameter of 12 mm ⁇ , and a height of 120 mm with a lid on one side while vibrating with a wooden mallet, and the open side was capped. Fix things. The mixture filled in the mold is put into a dryer at 160 ° C. together with the mold, heated for 120 minutes, and then allowed to cool to 50 ° C. or lower.
- a mixer Micro Speed Mixer MS-25 type manufactured by Takara Koki Co., Ltd.
- the lid was removed, the molded body was extracted from the mold so as not to break the molded body, and the resulting molded body was cut to produce a dry molded body having an outer diameter of 15 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm (hereinafter referred to as water).
- a molded body obtained by molding without using it is called a dry molded body).
- the weight of the dry molding was 1.28 g.
- the obtained dry molded body was inserted into the inner diameter part of the wet molded body obtained by the same method as in Example 2 to produce a composite molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm.
- the weight of the wet molded body was 23.81 g.
- Tables 1 and 2 show the evaluation results of the water treatment filter. Compared with Comparative Example 1, the turbidity filtration ability was improved by 1.3 times or more due to the effect of grinding, and compared with Comparative Example 2 by 2.6 times or more.
- Example 5 A slurry is prepared in the same manner as in Comparative Example 1, and a cylindrical non-woven fabric is attached to a mold having an outer diameter of 40 mm ⁇ , a medium shaft diameter of 18 mm ⁇ , and an outer diameter wrinkle interval of 180 mm, so that the slurry is about 2 mm larger than the mold outer diameter. Only suction was performed and dried.
- the outer surface of the molded body was ground with a grinder to produce a molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 18 mm ⁇ , and a height of 180 mm.
- wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 18 mm ⁇ , and a height of 54 mm.
- the weight of the wet molded body was 21.64 g.
- a single spunbond nonwoven fabric was wound around the outer periphery of the molded body.
- a mixture for dry molding was prepared in the same manner with the same formulation as in Example 4. Using the obtained mixture, a cylindrical stainless steel mold with an inner diameter of 18 mm ⁇ , a core diameter of 12 mm ⁇ , and a height of 120 mm with a lid on one side, cut the molded product obtained in the same process as in Example 4, A dry molded body having an outer diameter of 18 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm was produced. The weight of the dry molding was 3.61 g.
- the obtained dry molded body was inserted into the inner diameter part of the wet molded body to produce a composite molded body having an inner diameter of 12 mm ⁇ , an outer diameter of 40 mm ⁇ , and a height of 54 mm.
- Tables 1 and 2 show the evaluation results of the water treatment filter.
- the turbidity filtration capacity was improved to 1.2 times or more compared with Comparative Example 1 and 2.4 times or more due to the effect of grinding compared to Comparative Example 2.
- Example 6 A mixture for dry molding was prepared in the same manner with the same formulation as in Example 4. Using the obtained mixture, a cylindrical stainless steel mold with an inner diameter of 20 mm ⁇ , a core diameter of 12 mm ⁇ , and a height of 120 mm with a lid on one side, the molded body obtained in the same process as in Example 4 was cut, A dry molded body having an outer diameter of 20 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm was produced. The weight of the dry molding was 5.19 g.
- the obtained dry molded body was inserted into the inner diameter part of the wet molded body obtained by the same method as in Example 3 to produce a composite molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm.
- the weight of the wet molded body was 20.52 g.
- Tables 1 and 2 show the evaluation results of the water treatment filter. Compared with Comparative Example 1, the turbidity filtration ability was improved by 1.1 times or more due to the effect of grinding, and compared with Comparative Example 2 by 2.2 times or more.
- Example 7 A slurry is prepared in the same manner as in Comparative Example 1, and a cylindrical non-woven fabric is mounted on a mold having an outer diameter of 40 mm ⁇ , an intermediate shaft diameter of 23 mm ⁇ , and an outer diameter wrinkle interval of 180 mm, and the slurry becomes about 2 mm larger than the outer diameter of the mold. Thus, only suction was performed and dried.
- the outer surface of the molded body was ground with a grinder to produce a molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 23 mm ⁇ , and a height of 180 mm.
- wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 18 mm ⁇ , and a height of 54 mm.
- the weight of the wet molded body was 17.69 g.
- a single spunbond nonwoven fabric was wound around the outer periphery of the molded body.
- a mixture for dry molding was prepared in the same manner with the same formulation as in Example 4. Using the obtained mixture, a cylindrical stainless steel mold having an inner diameter of 23 mm ⁇ , a core diameter of 12 mm ⁇ , and a height of 120 mm with a lid on one side, and cutting the molded body obtained in the same process as in Example 4, A dry molded body having an outer diameter of 23 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm was produced. The weight of the dry molding was 8.46 g.
- the obtained dry molded body was inserted into the inner diameter part of the wet molded body to produce a composite molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm.
- Tables 1 and 2 show the evaluation results of the water treatment filter. Compared with Comparative Example 2, the turbidity filtration ability was improved more than twice by the effect of grinding.
- Example 8 A slurry is prepared in the same manner as in Comparative Example 1, and a cylindrical non-woven fabric is attached to a mold having an outer diameter of 40 mm ⁇ , a middle shaft diameter of 12 mm ⁇ , and an outer diameter wrinkle spacing of 180 mm, so that the slurry is about 2 mm larger than the outer diameter of the mold. Only suction was performed and dried. The obtained molded body was mounted on the automatic grinding machine shown in FIG.
- the molded body rotation speed was 450 rotations / minute
- the grinding wheel rotation speed was 1800 rotations / minute
- the grinding wheel moving speed was 300 mm / 3.5 seconds (8.6 cm / Second)
- the outer surface of the molded body was ground to produce a molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 180 mm. Further, it was cut to produce a wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm.
- the weight of the wet molded body was 24.93 g.
- a spunbond nonwoven fabric was wrapped around the outer periphery of the molded body in a single layer to obtain a test filter.
- Tables 1 and 2 show the evaluation results of the water treatment filter. Compared with Comparative Example 1, the turbidity filtration capacity was improved by 1.2 times or more due to the effect of grinding, and compared with Comparative Example 2 by 2.3 times or more.
- Example 9 A slurry is prepared in the same manner as in Comparative Example 1, and a cylindrical non-woven fabric is attached to a mold having an outer diameter of 40 mm ⁇ , a middle shaft diameter of 12 mm ⁇ , and an outer diameter wrinkle interval of 180 mm, so that the slurry is about 2 mm larger than the mold outer diameter Only suction was performed and dried.
- the obtained molded body is mounted on the automatic grinding machine shown in FIG. 2, and the molded body has a rotation speed of 300 rotations / minute, a grinding wheel rotation speed of 1800 rotations / minute, and a grinding wheel moving speed of 300 mm / 5 seconds (6 cm / second).
- the outer surface of the molded body was ground to produce a molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 180 mm. Further, it was cut to produce a wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm. The weight of the wet molded body was 24.93 g. A spunbonded nonwoven fabric was wrapped around the outer periphery of the molded body in a single layer to form a test filter.
- Tables 1 and 2 show the evaluation results of the water treatment filter. Compared with Comparative Example 1, the turbidity filtration capacity was improved by 1.2 times or more due to the effect of grinding, and compared with Comparative Example 2 by 2.3 times or more.
- Example 10 Example 1 except that the mixing ratio of the slurry was 0.552 kg of activated carbon small particles, 0.552 kg of activated carbon large particles, 0.096 kg of titanosilicate lead adsorbent, and 0.06 kg of fibrous binder (in terms of dry weight).
- a wet molded body was prepared. The central particle diameter of the activated carbon constituting this molded body was 66.3 ⁇ m, and the weight of the molded body was 24.42 g.
- a spunbonded nonwoven fabric was wrapped around the outer periphery of the molded body in a single layer to form a test filter.
- Tables 1 and 2 show the evaluation results of the water treatment filter. Since the center particle diameter of the granular activated carbon was larger than that of other examples, the turbidity filtration ability was lowered.
- Example 11 With respect to 4.0 kg of activated carbon large particles, 4.0 kg of a granular binder was put into a mixer (“Micro Speed Mixer MS-25 type” manufactured by Takara Koki Co., Ltd.) and stirred for 2 minutes. The obtained mixture was filled into a cylindrical stainless steel mold with an inner diameter of 18 mm ⁇ , a core diameter of 12 mm ⁇ , and a height of 200 mm with a lid on one side while gradually vibrating with a mallet, and the open side was capped. Fix things. The mixture filled in the mold is put into a dryer at 160 ° C. together with the mold, heated for 120 minutes, and then allowed to cool to 50 ° C. or lower.
- a mixer Micro Speed Mixer MS-25 type manufactured by Takara Koki Co., Ltd.
- the lid was removed, the molded body was extracted from the mold so as not to break the molded body, and the obtained molded body was cut to produce a dry molded body having an outer diameter of 18 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 200 mm.
- the weight of the dry molding was 13.67 g.
- a slurry was prepared in the same manner as in Comparative Example 1, and the obtained dry molded body was mounted on a mold having an outer diameter of 40 mm ⁇ , an intermediate shaft diameter of 12 mm ⁇ , and an outer diameter of the ridges of 180 mm, and the slurry was 2 mm from the outer diameter of the mold. Only suction was performed to increase the degree of drying.
- the outer surface of the molded body was ground with a grinder to produce a molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 180 mm.
- the integrally molded body (The molded object which the dry-type molded object and the wet molded object integrated
- the weight of this integrally molded body was 25.85 g. From the weight of the dry molded body used, the weight of the wet molded body in the integrally molded body was 21.72 g, and the weight of the dry molded body was 4.13 g.
- a spunbonded nonwoven fabric was wrapped around the outer periphery of the molded body in a single layer to form a test filter.
- Tables 1 and 2 show the evaluation results of the water treatment filter. As a result of grinding, the turbidity filtration ability was improved 1.3 times compared to Comparative Example 1 and 2.6 times compared to Comparative Example 2.
- Comparative Example 5 A slurry is prepared in the same manner as in Comparative Example 1, and a cylindrical non-woven fabric is attached to a mold having an outer diameter of 40 mm ⁇ , a middle shaft diameter of 12 mm ⁇ , and an outer diameter wrinkle spacing of 180 mm, so that the slurry is about 2 mm larger than the outer diameter of the mold. Only suction was performed and dried.
- the obtained molded body is mounted on the automatic grinding machine shown in FIG. 2, and the molded body rotation speed is 300 rotations / minute, the grinding wheel rotation speed is 300 rotations / minute, and the grinding wheel moving speed is 300 mm / 10 seconds (3 cm / second). When the outer surface of the molded body was ground, the ground portion collapsed and a molded body with a uniform shape could not be obtained.
- the molding mold described in FIG. 1 of Japanese Patent No. 3516811 (tubular mold having a large number of suction holes) is used as a mold having an outer diameter of 40 mm ⁇ , an intermediate shaft diameter of 12 mm ⁇ , and an outer diameter of the gap of 180 mm.
- a cylindrical nonwoven fabric was mounted, and the slurry was only sucked and molded to the outer diameter of the mold of 40 mm ⁇ .
- the molded body was removed from the mold, dried, and then cut to prepare a wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm.
- a spunbond nonwoven fabric was wrapped around the outer periphery of this molded body in a single layer to obtain a test filter. At this time, the molded body weight was 29.56 g.
- Tables 1 and 2 show the volatile organic compound removal ability and turbidity filtration ability of the water treatment filter. Since the particle diameter used was larger than that of Example 1, the turbid filtration ability was not expressed.
- Comparative Example 7 A slurry is prepared in the same manner as in Comparative Example 6, and a cylindrical nonwoven fabric is attached to a mold having an outer diameter of 40 mm ⁇ , a medium shaft diameter of 12 mm ⁇ , and an outer diameter of ⁇ spacing of 180 mm so that the slurry is about 2 mm larger than the outer diameter of the mold. Only suction was performed and dried.
- the obtained molded body is mounted on the automatic grinding machine shown in FIG. 2 and molded at a molded body rotation speed of 300 rotations / minute, a grinding wheel rotation speed of 1200 rotations / minute, and a grinding wheel moving speed of 300 mm / 10 seconds (3 cm / second).
- the outer surface of the body was ground to produce a molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 180 mm. Further, it was cut to produce a wet molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm.
- a spunbond nonwoven fabric was wrapped around the outer periphery of this molded body in a single layer to obtain a test filter. At this time, the molded body weight was 25.54 g.
- Tables 1 and 2 show the volatile organic compound removal ability and turbidity filtration ability of the water treatment filter. Since the particle diameter used was larger than that of Example 1, the turbid filtration ability was not expressed. In addition, the filtration capacity of free residual chlorine and total THM was also reduced.
- the lid was removed, the molded body was extracted from the mold so as not to break the molded body, and the obtained molded body was cut to produce a dry molded body having an outer diameter of 40 mm ⁇ , an inner diameter of 12 mm ⁇ , and a height of 54 mm.
- the turbid filtration capacity was 0.23 times that of Comparative Example 1 and 0.45 times that of Comparative Example 2, which was a low value.
- the flow resistance increased at a flow rate of 5580 L, and the test could not be continued, and the test was stopped.
- the water treatment filter of the present invention can be used as a water purifier filter for home use or industrial use.
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Abstract
Description
本発明の水処理フィルターは、中心粒子径が30~80μmである粒状活性炭(a1)及びフィブリル化された繊維状バインダー(a2)を含む円筒状フィルター(A)を備えており、この円筒状フィルター(A)は、外表面が濾過の上流側となり、中空部内の内表面が濾過の下流側となる。本発明では、この円筒状フィルター(A)の外表面は、圧縮処理(転動処理)されておらず、研削により得られるため、吸引スラリー法で得られた円筒状フィルター及びこのフィルターの外表面を圧縮処理したフィルターとは異なる所定の表面特性を有している。そのため、寸法精度に優れ、画一的なハウジングに高い歩留まりで充填(収容)できるとともに、濁り成分の除去性能などの濾過性能を向上できる。
具体的には、円筒状フィルター(A)の外表面の算術平均うねりWaが30μm以下(特に25μm以下)であり、例えば、1~30μm、好ましくは5~25μm、さらに好ましくは10~23μm(特に15~20μm)程度である。算術平均うねりが30μmを超えると、寸法精度が低下するため、水処理フィルターとしてハウジングに装着(充填)するのが困難となり、歩留まりが低下する。なお、ハウジングへの装着性を考慮して、ハウジングのサイズよりも予め小さいサイズで製造すると、濾過性能などが低下する。
本発明の水処理フィルターには、所定の中心粒子径に調整された粒状活性炭が使用される。粒状活性炭(a1)の中心粒子径は30~80μmであり、好ましくは30~60μm、さらに好ましくは35~55μm(特に40~50μm)程度である。中心粒子径が30μm未満であると、濁り成分により容易に目詰まりを起こす。中心粒子径が60μmを超えると、濁り成分の除去が低下する。
フィブリル化された繊維状バインダー(a2)としては、高圧ホモジナイザーや高速離解機などを用いてフィブリル化させることによって、粒状活性炭を絡めて賦形できるパルプ状のバインダー繊維であれば、特に限定されず、合成品、天然品を問わず幅広く使用可能である。
本発明の水処理フィルターは、図1に示すように、円筒状フィルター(A)1と、円筒状フィルター(A)の中空部(内径部)に挿入された円筒状フィルター(B)2とを備えた水処理フィルターであってもよい。円筒状フィルター(B)は、円筒状フィルター(A)の強度を向上させ、補強材としての機能を有するとともに、揮発性有機化合物及び濁り成分の除去性能も併せ持つ。
本発明の水処理フィルターは、円筒状フィルター(A)単独で使用してもよいが、強度を補強するための補強材と組み合わせてもよい。補強材としては、円筒状フィルター(A)の中空部に、ネトロンパイプやセラミックフィルターなどの補強材を挿入してもよいが、水処理フィルター内の活性炭量の増加により濾過性能も向上できる点から、円筒状フィルター(B)との組み合わせが特に好ましい。
円筒状フィルター(A)は、粒状活性炭(a1)及び繊維状バインダー(a2)を混合して得た混合物を水中に分散させスラリーを調製するスラリー調製工程と、前記スラリーを吸引しながら濾過して予備成型体(A1)を得る吸引濾過工程と、前記予備成型体(A1)を乾燥して乾燥した成型体(A2)を得る乾燥工程と、前記成型体(A2)の外表面を研削する研削工程とを含む製造方法により得られる。
前記スラリー調製工程において、粒状活性炭(a1)及び繊維状バインダー(a2)を、固形分濃度が0.1~10質量%(特に1~5質量%)になるように、水に分散させたスラリーを調製する。前記スラリーの固形分濃度が高すぎると、分散が不均一になり易く、成型体に斑が生じ易い。一方、固形分濃度が低すぎると、成型時間が長くなり生産性が低下するだけではなく、成型体の密度が高くなり、濁り除去性能が低下し易い。
吸引濾過工程では、前記スラリーに多数の穴を有する成型用の型枠を入れて、前記型枠の内側から吸引しながら濾過することにより成型する。成型用の型枠としては、例えば、慣用の型枠を利用でき、例えば、特許第3516811号公報の図1に記載の型枠などを使用できる。吸引方法としても、慣用の方法、例えば、吸引ポンプなどを用いて吸引する方法などを利用できる。
乾燥工程では、吸引濾過工程で得られた予備成型体(A1)を型枠から取り外し、乾燥機などで乾燥することにより成型体(A2)を得ることができる。
研削工程では、乾燥した成型体(A2)の外表面を研削(又は研磨)できれば、特に限定されず、慣用の研削方法を利用できるが、研削の均一性の点から、成型体(A2)自体を回転させて研削する方法が好ましい。
円筒状フィルター(B)は、粒状活性炭(b1)及び粒状バインダー(b2)を混合して得た混合物を加熱成型して円筒状フィルター(B)を得る成型工程を含む製造方法により得られる。
湿式粒度分布測定装置(日機装(株)製「マイクロトラックMT3000」)を用いて、レーザー回折・散乱法により中心粒子径(D50)を測定した。
見掛け密度(g/cm3)は、得られた円筒状フィルターを120℃で2時間乾燥した後、測定した重量(g)及び体積(cm3)に基づいて求めた。
濁り成分の除去性能については、JIS S3201(2010)に準拠して測定した。但し、初期の通液量を3リットル/分に設定し、設定後は初期通気時の動水圧となるように通液量を調整して試験した。
遊離残留塩素の除去性能については、JIS S3201(2010)に準拠して測定した。但し、通液量を3リットル/分に設定して測定した。
総THM(トリハロメタン)の除去性能については、JIS S3201(2010)に準拠して測定した。但し、通液量を3リットル/分に設定して測定した。
成型体にフィルターや不織布を巻いていない状態で、3リットル/分の通液量で通液した場合の通液初期の通液抵抗を測定した。
非接触表面粗さ測定機(オリンパス製(株)製「LEXT OLS4000」)を用いて、算術平均うねりWa及び断面曲線の算術平均高さPaを測定した。測定条件を下記に示す。なお、測定は、任意の3箇所(長さ方向に3等分した領域の各々の略中央部)で測定し、平均値を求めた。なお、実施例1の内表面の測定では、内表面に積層されている不織布を慎重に剥離した後に測定した。
カットオフ波長(λc):80.0μm
フィルター:ガウシアンフィルター
顕微鏡倍率:5倍。
引張・圧縮試験機((株)オリエンテック製「テンシロンRTC-1210A」)を用いて、円筒状フィルターの長手方向に速度2mm/分で圧力を掛けて圧壊強度を測定した。
活性炭小粒子:クラレケミカル(株)製「PGW-20MD」、ヤシ殻原料、中心粒子径47.9μm、ベンゼン吸着量=33%
活性炭大粒子:クラレケミカル(株)製「PGW-100MD」、ヤシ殻原料、中心粒子径103.7μm、ベンゼン吸着量=33%
チタノシリケート系鉛吸着剤:BASF社製「ATS」、平均粒子径20μm
繊維状バインダー:日本エクスラン工業(株)製「フィブリル化アクリルパルプBi-PUL/F」
粒状バインダー:高密度ポリエチレン粉末、三井化学(株)製「ミペロンMP-200」
円筒状不織布:シンワ(株)製「9540F」を円筒状に加工した不織布
スパンボンド不織布:ユニチカ(株)製「T0703WDO」。
活性炭小粒子1.104kg、チタノシリケート系鉛吸着剤0.096kg、繊維状バインダー0.06kg(乾燥重量換算)を投入し、水道水を追加して、スラリー量を20リットルとした。
比較例1と同じ配合で同様にスラリーを調製し、外径40mmφ、中軸径12mmφ、外径鍔間隔180mmの金型に円筒状不織布を装着し、スラリーを吸引後、表面を金型外径まで加圧回転(転動)成型し、乾燥後、切断して、外径40mmφ、内径12mmφ、高さ54mmの湿式成型体を作製した。成型体の重量は28.52gであった。
比較例1と同じ配合で同様にスラリーを調製し、外径40mmφ、中軸径15mmφ、外径鍔間隔180mmの金型に円筒状不織布を装着し、スラリーを吸引後、表面を金型外径まで加圧回転成型し、乾燥後、切断して、外径40mmφ、内径15mmφ、高さ54mmの湿式成型体を作製した。成型体の重量は27.12gであった。
比較例1と同じ配合で同様にスラリーを調製し、外径40mmφ、中軸径20mmφ、外径鍔間隔180mmの金型に円筒状不織布を装着し、スラリーを吸引後、表面を金型外径まで加圧回転成型し、乾燥後、切断して、外径40mmφ、内径20mmφ、高さ54mmの湿式成型体を作製した。成型体の重量は23.04gであった。
比較例1と同じ配合で同様にスラリーを調製し、外径40mmφ、中軸径12mmφ、外径鍔間隔180mmの金型に円筒状不織布を装着し、スラリーを金型外径より2mm程度大きくなるように吸引のみ実施し乾燥した。得られた成型体を、図2に示す自動研削機に装着し、成型体回転数300回転/分、砥石回転数1200回転/分、砥石移動速度300mm/10秒(3cm/秒)で、成型体の外表面を研削し、外径40mmφ、内径12mmφ、高さ180mmの成型体を作製した。更に切断して、外径40mmφ、内径12mmφ、高さ54mmの湿式成型体を作製した。成型体の重量は24.93gであった。
比較例1と同じ配合で同様にスラリーを調製し、外径40mmφ、中軸径15mmφ、外径鍔間隔180mmの金型に円筒状不織布を装着し、スラリーを金型外径より2mm程度大きくなるように吸引のみ実施し乾燥した。実施例1と同様に研削機で成型体の外表面を研削し、外径40mmφ、内径15mmφ、高さ180mmの成型体を作製した。更に切断して、外径40mmφ、内径15mmφ、高さ54mmの湿式成型体を作製した。成型体の重量は23.80gであった。
比較例1と同じ配合で同様にスラリーを調製し、外径40mmφ、中軸径20mmφ、外径鍔間隔180mmの金型に円筒状不織布を装着し、スラリーを金型外径より2mm程度大きくなるように吸引のみ実施し乾燥した。実施例1と同様に研削機で成型体の外表面を研削し、外径40mmφ、内径20mmφ、高さ180mmの成型体を作製した。更に切断して、外径40mmφ、内径20mmφ、高さ54mmの湿式成型体を作製した。成型体の重量は20.09gであった。
活性炭小粒子6.8kgに対し、粒状バインダー1.2kgをミキサー(宝工機(株)製「マイクロスピードミキサーMS-25型」)に投入し、2分間攪拌した。得られた混合物を、片側に蓋をした内径15mmφ、中芯径12mmφ、高さ120mmの筒状ステンレス製金型に少しずつ木槌で振動を与えながら充填し、開放側に蓋をして内容物を固定する。金型に充填された混合物を、金型ごと160℃の乾燥機に投入し、120分間加熱した後、50℃以下まで放冷する。蓋を外して、成型体を壊さないよう金型から成型体を抜き出し、得られた成型体を切断し、外径15mmφ、内径12mmφ、高さ54mmの乾式成型体を作製した(以下、水を使用せずに成型して得られた成型体を乾式成型体と称する)。乾式成型体の重量は1.28gであった。
比較例1と同じ配合で同様にスラリーを調製し、外径40mmφ、中軸径18mmφ、外径鍔間隔180mmの金型に円筒状不織布を装着し、スラリーを金型外径より2mm程度大きくなるように吸引のみ実施し乾燥した。実施例1と同様に研削機で成型体の外表面を研削し、外径40mmφ、内径18mmφ、高さ180mmの成型体を作製した。更に切断して、外径40mmφ、内径18mmφ、高さ54mmの湿式成型体を作製した。湿式成型体の重量は21.64gであった。この成型体外周部に、スパンボンド不織布を1重に巻きつけた。
実施例4と同じ配合で同様に乾式成型体用混合物を作製した。得られた混合物を、片側に蓋をした内径20mmφ、中芯径12mmφ、高さ120mmの筒状ステンレス製金型を使用し、実施例4と同様の工程で得られた成型体を切断し、外径20mmφ、内径12mmφ、高さ54mmの乾式成型体を作製した。乾式成型体の重量は5.19gであった。
比較例1と同じ配合で同様にスラリーを調製し、外径40mmφ、中軸径23mmφ、外径鍔間隔180mmの金型に円筒状製不織布を装着し、スラリーを金型外径より2mm程度大きくなるように吸引のみ実施し乾燥した。実施例1と同様に研削機で成型体の外表面を研削し、外径40mmφ、内径23mmφ、高さ180mmの成型体を作製した。更に切断して、外径40mmφ、内径18mmφ、高さ54mmの湿式成型体を作製した。湿式成型体の重量は17.69gであった。この成型体外周部に、スパンボンド不織布を1重に巻きつけた。
比較例1と同じ配合で同様にスラリーを調製し、外径40mmφ、中軸径12mmφ、外径鍔間隔180mmの金型に円筒状不織布を装着し、スラリーを金型外径より2mm程度大きくなるように吸引のみ実施し乾燥した。得られた成型体を、図2に記載の自動研削機に装着し、成型体回転数450回転/分、砥石回転数1800回転/分、砥石移動速度300mm/3.5秒(8.6cm/秒)で、成型体の外表面を研削し、外径40mmφ、内径12mmφ、高さ180mmの成型体を作製した。更に切断して、外径40mmφ、内径12mmφ、高さ54mmの湿式成型体を作製した。湿式成型体の重量は24.93gであった。この成型体外周部にスパンボンド不織布を1重に巻きつけ試験用フィルターとした。
比較例1と同じ配合で同様にスラリーを調製し、外径40mmφ、中軸径12mmφ、外径鍔間隔180mmの金型に円筒状不織布を装着し、スラリーを金型外径より2mm程度大きくなるように吸引のみ実施し乾燥した。得られた成型体を、図2に記載の自動研削機に装着し、成型体の回転数300回転/分、砥石回転数1800回転/分、砥石移動速度300mm/5秒(6cm/秒)で、成型体の外表面を研削し、外径40mmφ、内径12mmφ、高さ180mmの成型体を作製した。更に切断して、外径40mmφ、内径12mmφ、高さ54mmの湿式成型体を作製した。湿式成型体の重量は24.93gであった。この成型体外周部に、スパンボンド不織布を1重に巻きつけ試験用フィルターとした。
スラリーの配合比を活性炭小粒子0.552kg、活性炭大粒子0.552kg、チタノシリケート系鉛吸着剤0.096kg、繊維状バインダー0.06kg(乾燥重量換算)とした以外は実施例1と同様に湿式成型体を作製した。この成型体を構成する活性炭の中心粒子径は66.3μmであり、成型体の重量は24.42gであった。この成型体外周部に、スパンボンド不織布を1重に巻きつけ試験用フィルターとした。
活性炭大粒子4.0kgに対し、粒状バインダー4.0kgをミキサー(宝工機(株)製「マイクロスピードミキサーMS-25型」)に投入し、2分間攪拌した。得られた混合物を、片側に蓋をした内径18mmφ、中芯径12mmφ、高さ200mmの筒状ステンレス製金型に少しずつ木槌で振動を与えながら充填し、開放側に蓋をして内容物を固定する。金型に充填された混合物を、金型ごと160℃の乾燥機に投入し、120分間加熱した後、50℃以下まで放冷する。蓋を外して、成型体を壊さないよう金型から成型体を抜き出し、得られた成型体を切断し、外径18mmφ、内径12mmφ、高さ200mmの乾式成型体を作製した。乾式成型体の重量は13.67gであった。
比較例1と同じ配合で同様にスラリーを調製し、外径40mmφ、中軸径12mmφ、外径鍔間隔180mmの金型に円筒状不織布を装着し、スラリーを金型外径より2mm程度大きくなるように吸引のみ実施し乾燥した。得られた成型体を、図2に記載の自動研削機に装着し、成型体回転数300回転/分、砥石回転数300回転/分、砥石移動速度300mm/10秒(3cm/秒)で、成型体の外表面を研削したところ、研削部位が崩壊し均一形状の成型体が得られなかった。
活性炭大粒子1.104kg、チタノシリケート系鉛吸着剤0.096kg及び繊維状バインダー0.06kg(乾燥重量換算)を投入し、水道水を追加して、スラリー量を20リットルとした。
比較例6と同じ配合で同様にスラリーを調製し、外径40mmφ、中軸径12mmφ、外径鍔間隔180mmの金型に円筒状不織布を装着し、スラリーを金型外径より2mm程度大きくなるように吸引のみ実施し乾燥した。
活性炭小粒子6.8kgに対し、粒状バインダー1.2kgをミキサー(宝工機(株)製「マイクロスピードミキサーMS-25型」)に投入し2分間攪拌した。得られた混合物を、片側に蓋をした内径40mmφ、中芯径12mmφ、高さ120mmの筒状ステンレス製金型に少しずつ木槌で振動を与えながら充填し、開放側に蓋をして内容物を固定する。金型に充填された混合物を、金型ごと160℃の乾燥機に投入し、120分間加熱した後、50℃以下まで放冷する。蓋を外して、成型体を壊さないよう金型から成型体を抜き出し、得られた成型体を切断し、外径40mmφ、内径12mmφ、高さ54mmの乾式成型体を作製した。比較例1に対して、濁り濾過能力が0.23倍、比較例2に対しても0.45倍と低い値であった。さらに、残留塩素試験では、通液量5580Lにおいて通液抵抗が高くなって試験の続行が不可能となり、試験を中止した。
2…円筒状フィルター(B)
11…研削機
12,17…回転軸
13…円盤状砥石
14,18…モーター
15,16…エアシリンダー
19:操作盤
20…成型体
Claims (10)
- 中心粒子径が30~80μmである粒状活性炭(a1)及びフィブリル化された繊維状バインダー(a2)を含む円筒状フィルター(A)を備えた水処理フィルターであって、前記円筒状フィルター(A)の上流側である外表面の算術平均うねりが30μm以下であり、かつ断面曲線の算術平均高さが35~45μmである水処理フィルター。
- さらに円筒状フィルター(A)の中空部に挿入され、かつ中心粒子径が30~80μmである粒状活性炭(b1)及び粒状バインダー(b2)を含む円筒状フィルター(B)を備えた請求項1記載の水処理フィルター。
- 円筒状フィルター(A)と円筒状フィルター(B)との密度比が、円筒状フィルター(A)/円筒状フィルター(B)=0.7/1~1.5/1である請求項1又は2記載の水処理フィルター。
- 円筒状フィルター(A)と円筒状フィルター(B)の体積比が、円筒状フィルター(A)/円筒状フィルター(B)=3/1~20/1である請求項1~3のいずれかに記載の水処理フィルター。
- 円筒状フィルター(A)の下流側である内表面の算術平均高さが、外表面の算術平均高さに対して0.5~1.5倍である請求項1~4のいずれかに記載の水処理フィルター。
- 円筒状フィルター(A)の外表面が、圧縮処理されておらず、研削により得られる表面である請求項1~5のいずれかに記載の水処理フィルター。
- 粒状活性炭(a1)及び繊維状バインダー(a2)を混合して得た混合物を水中に分散させスラリーを調製するスラリー調製工程と、
前記スラリーを吸引しながら濾過して予備成型体(A1)を得る吸引濾過工程と、
前記予備成型体(A1)を乾燥して乾燥した成型体(A2)を得る乾燥工程と、
前記成型体(A2)の外表面を研削する研削工程とを含む請求項1記載の水処理フィルターの製造方法。 - 研削工程において、研削深度が粒状活性炭(a1)の中心粒子径に対して5~200倍である請求項7記載の製造方法。
- 研削工程において、成型体(A2)を回転させて研削する請求項7又は8記載の製造方法。
- 粒状活性炭(b1)及び粒状バインダー(b2)を混合して得た混合物を加熱成型して円筒状フィルター(B)を得る成型工程と
円筒状フィルター(A)の中空部に円筒状フィルター(B)を挿入する挿入工程とをさらに含む請求項7~9のいずれかに記載の製造方法。
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CN201380067101.4A CN104854036B (zh) | 2012-10-19 | 2013-10-17 | 水处理过滤器及其制造方法 |
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US14/435,924 US10023475B2 (en) | 2012-10-19 | 2013-10-17 | Water processing filter and manufacturing method therefor |
KR1020157012075A KR102117733B1 (ko) | 2012-10-19 | 2013-10-17 | 수처리 필터 및 그 제조 방법 |
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CN104854036B (zh) | 2016-09-21 |
TW201429541A (zh) | 2014-08-01 |
CN104854036A (zh) | 2015-08-19 |
KR102117733B1 (ko) | 2020-06-01 |
TWI593454B (zh) | 2017-08-01 |
JPWO2014061740A1 (ja) | 2016-09-05 |
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