TW201941920A - Molded activated-carbon cartridge and manufacturing method therefor - Google Patents

Abstract

The purpose of the present invention is to provide a molded activated carbon cartridge that is not damaged by water pressure even if water passes through the molded activated carbon cartridge from the inner circumferential side to the outer circumferential side thereof. This molded activated carbon cartridge includes a cylindrical molded activated carbon containing an activated carbon and a fibrous binder, and a packaging material that is wrapped around the outer circumference of the molded activated carbon, wherein the pressure resistance when water passes through the molded activated carbon and the packaging material toward the outside of the molded activated carbon cartridge from a space inside the molded activated carbon cartridge is equal to or greater than 0.1 MPa.

Description

   Shaped activated carbon box and manufacturing method thereof   

The present invention relates to a shaped activated carbon cartridge for a water treatment filter and a method for manufacturing the same.

A technique for producing a molded body using activated carbon and a fibrous binder as a filter material for water treatment is known. For example, Patent Document 1 discloses a method for manufacturing a cylindrical shaped adsorbent by sucking a slurry containing a fibrous binder and activated carbon. Patent Document 2 discloses a method of suppressing the pressure loss of the formed adsorbent by adjusting the degree of fibrillation of the fibrous adhesive. In addition, Patent Document 3 discloses an adsorption filter having a specific particle size distribution of activated carbon, which is unlikely to cause clogging, and has a low resistance.

The shaped activated carbon can be produced by using a shaping mold as a core and sucking a liquid containing activated carbon and a fibrous binder to deposit activated carbon on the shaping mold. Therefore, a cylindrical shape is widely known. By passing water from the outer peripheral side to the inner peripheral side of the cylindrical shaped activated carbon, or by passing water in the opposite direction, and passing water along the diameter of the activated carbon, there is an advantage of suppressing pressure loss.

    [Prior technical literature]         [Patent Literature]    

[Patent Document 1] Japanese Patent Laid-Open No. 2011-255310

[Patent Document 2] Japanese Patent Laid-Open No. 2015-112518

[Patent Document 3] International Publication No. 2016/080240

When water flows into the cylindrical shaped activated carbon, a load may be applied to the shaped activated carbon due to water passing resistance in the diameter direction, and cracks or collapse may occur. In this case, the water is biased at the ruptured or collapsed part of the formed activated carbon, and the required filtration performance cannot be obtained.

In the case where water flows from the outer peripheral side to the inner peripheral side of the formed activated carbon, it is relatively easy to have pressure resistance by increasing the strength of the forming mold as a core. On the other hand, in order to facilitate the design of the flow path of the container containing the formed activated carbon, water may flow from the inner peripheral side to the outer periphery of the formed activated carbon. Since this case does not serve as a supporting member, water pressure is applied. It is difficult to avoid cracking of the shaped activated carbon during the resulting load.

Patent Document 2 discloses that the outer peripheral surface of the formed activated carbon is covered with a non-woven fabric, but the conditions and pressure resistance are not disclosed. In addition, only water flow from the outer peripheral side to the inner peripheral side is disclosed.

Patent Literature 3 discloses an adsorbed molded body having excellent compressive strength by removing fine powder of activated carbon. However, the disclosed compressive strength is only the pressure resistance when a pressure is applied from the outside of the filter material.

As such, it has not been found that a cylindrical shaped activated carbon having sufficient pressure resistance does not occur even when water is passed from the inside to the outside.

(1) The shaped activated carbon cartridge of the present invention that solves the above-mentioned problems includes a cylindrical shaped activated carbon containing activated carbon and a fibrous binder, and a packaging material wound around the outer periphery of the shaped activated carbon, and from the above The pressure resistance of the space inside the shaped activated carbon case when the water is passed through the shaped activated carbon and the packaging material to the outside of the shaped activated carbon case is 0.1 MPa or more.

The shaped activated carbon cartridge of the present invention preferably satisfies at least one of the following (2) to (4).

(2) The elastic modulus of the packaging material is 0.8 MPa or more.

(3) The packaging material is a non-woven fabric.

(4) The fibers constituting the nonwoven fabric are core-sheath type composite fibers.

(5) One of the methods for manufacturing the shaped activated carbon cartridge of the present invention that solves the above-mentioned problems is a manufacturing method in which a packaging material is provided on the outer periphery of a cylindrical shaped activated carbon including activated carbon and a fibrous binder, and is provided in a circumferential direction Winding at a tension of 2.0 gf / mm or more.

(1) According to the present invention, it is possible to provide a formed activated carbon cartridge that does not cause damage due to water pressure even if water is passed from the inner peripheral side to the outer peripheral side of the formed activated carbon cartridge.

(2) In addition, if the elastic modulus of the packaging material wound around the molded activated carbon is 0.8 MPa or more, it can have sufficient pressure resistance because the cylindrical shaped activated carbon is packed on one turn of the packaging material.

(3) If the packaging material wound around the shaped activated carbon is a non-woven fabric, water resistance can be suppressed, and a lightweight and inexpensive shaped activated carbon box can be obtained.

(4) If the fibers constituting the non-woven fabric are core-sheath type composite fibers, when the non-woven fabric is packaged around the shaped activated carbon, the non-woven fabric is easily adhered and fixed by heat.

(5) By winding the packaging material wound around the shaped activated carbon with a tension of 2.0 gf / mm or more, it is possible to stably manufacture a shaped activated carbon cartridge having sufficient pressure resistance.

Specific examples will be described below to explain embodiments of the present invention. In addition, the present invention is not limited to the embodiments described below, and changes can be made within a range in which the above-mentioned objects of the present invention can be achieved.

The shaped activated carbon cartridge of the present invention includes a shaped activated carbon containing activated carbon and a fibrous binder, and a packaging material for packaging the outer periphery of the shaped activated carbon. From the viewpoint of filtration performance, the mass ratio of the activated carbon in the formed activated carbon is preferably 80% by mass or more, and more preferably 90% by mass or more and 98% by mass or less. If the ratio of activated carbon is reduced and the ratio of the following fibrous adhesive is set to 20% by mass or more, the strength of the formed activated carbon will be increased. However, the ratio of the activated carbon will decrease accordingly, which may result in a decrease in filtration performance.

As the activated carbon, fibrous activated carbon, granular activated carbon, or powdered activated carbon may be used. Among these, activated carbon may be used alone, or two or more activated carbons may be mixed at any ratio. The fibrous activated carbon may be selected from a phenol-based, pitch-based, polyacrylonitrile (PAN) -based, or cellulose-based raw material. As the fibrous activated carbon, those having a specific surface area of 1,000 to 2500 m ² / g can be used. Compared with granular activated carbon or powdered activated carbon, it has a faster adsorption rate and a lower pressure loss when water is passed through. In the case of granular activated carbon or powdered activated carbon, those using coconut shell, wood, coal, synthetic resin, etc. as raw materials can be used. The volume-based center particle diameter is preferably 30 μm or more and 200 μm or less. The smaller the central particle size, the higher the contact efficiency with water and the higher the filtration performance. However, as the particle size becomes smaller, the voids become smaller, so the pressure loss during water flow increases. By using activated carbon to which a metal having antibacterial properties such as silver, copper, and zinc is attached, it is also possible to impart antibacterial properties to the formed activated carbon case.

In addition, the volume-based center particle diameter refers to a particle diameter of 50% of the volume-based cumulative particle size distribution obtained by using a laser diffraction / scattering-type particle size distribution measurement device.

The mass ratio of the fibrous binder in the shaped activated carbon is preferably less than 20% by mass, and more preferably 2% by mass or more and 10% by mass or less. As the fibrous binder, if it is a fibrillated fiber, it is suitable to be wound and combined with activated carbon to form a molded body. Examples thereof include acrylic fibers, cellulose fibers, aromatic polyamide fibers, and nylon fibers. Among them can be used alone or in combination.

In the formed activated carbon, in addition to the activated carbon and the fibrous binder, a material for removing metal ions may also be included. By including aluminosilicate, titanosilicate, titanium oxide, ion exchange fiber, etc. as the removal material, a shaped activated carbon cartridge having the ability to remove harmful metal ions such as lead ions can be made. In order not to excessively reduce the ratio of activated carbon in the shaped activated carbon, the mass ratio of the removed material in the shaped activated carbon is preferably less than 20% by mass, and more preferably 10% by mass or less.

The packaging material wound around the outer periphery of the shaped activated carbon plays a role of supporting the shaped activated carbon and preventing damage such as cracking when water flows from the inner peripheral side to the outer peripheral side. In addition, the ability to remove free residual chlorine and the like contained in tap water can be maintained by preventing breakage and the like of the shaped activated carbon. If the pressure resistance of the formed activated carbon cartridge is 0.1 MPa or more, it is sufficient strength for use under running water pressure. The upper limit of the pressure resistance performance is not particularly limited, but is preferably 1.0 MPa or less from the viewpoint of the cost of the packaging material and the simplicity of the packaging method.

The pressure of the pressure-resistant performance in the present invention does not mean the pressure of the supplied water, but the difference between the pressure on the raw water side and the filtered water side of the cylindrical shaped activated carbon. That is, it is a value corresponding to the pressure loss of the formed activated carbon cartridge at the time of water flow. Furthermore, in the present invention, in the pressure test in which the set pressure was repeatedly applied 3,650 times described below, it was determined that the formed activated carbon portion of the formed activated carbon cartridge did not break, and it was determined that the pressure resistance performance above the set pressure was satisfied. 3650 times is a method of performing practical use for one year imitating the filtration using a shaped activated carbon cartridge 10 times a day. That is, in the present invention, the "pressure resistance is 0.1 MPa or more" means that the formed activated carbon portion of the formed activated carbon cartridge was not damaged in the pressure resistance test in which the pressure was repeatedly applied to 3,650 times at 0.1 MPa.

The packaging material is not particularly limited as long as it has water permeability and can physically support the formed activated carbon. Examples thereof include a mesh fabric, a cylindrical resin having an opening, a porous film, and a nonwoven fabric. Among these, a non-woven fabric is preferred from the standpoint of simplicity or cost of packaging.

The packaging material preferably has an elastic modulus of 0.8 MPa or more in a tensile test. If the elastic modulus is 0.8 MPa or more, the required pressure resistance can be obtained by wrapping the outer periphery of the shaped activated carbon with a packaging material. The higher the elastic modulus, the higher the rigidity, and the higher the ability to suppress the deformation of the formed activated carbon caused by the stress from the inner peripheral side to the outer peripheral side of the formed activated carbon. Since the breakage of the shaped activated carbon is thought to be caused by the deformation of the shaped activated carbon that cannot withstand the stress, it is preferred that the packing material be the packaging material having the above-mentioned elastic modulus. In the case of using a packaging material with an elastic modulus of less than 0.8 MPa, the required pressure resistance can be obtained by packaging the activated carbon with two or more circumferences.

In addition, the elastic modulus is determined by the following formula 1 when a tensile test is performed at a speed of 50 mm / min in a 25 ° C environment using a tensile tester. The elastic modulus of the packaging material in the present invention It is the modulus of elasticity at the time point when the load was 2gf / mm.

Formula 1: E = σ / ε = {F / (S × G)} / (△ x / x)

E: modulus of elasticity (MPa) σ: stress (MPa) ε: strain (-)

F: weight bearing (gf) G: gravity acceleration (m / s ² ) S: cross-sectional area (m ² )

△ x: displacement (m) x: initial effective length (m)

When a non-woven fabric is used as the packaging material, examples of the component include polyester, polypropylene, polyethylene, polyacrylonitrile, polyvinyl alcohol, cellulose, nylon, and polystyrene. The manufacturing method of the non-woven fabric can be appropriately selected from known methods such as a spunbond method, a meltblown method, a hot-press bonding method, a chemical bonding method, a needle punch method, and a spin spinning method.

Further, as the non-woven fabric for the packaging material, it is preferable to use a non-woven fabric whose constituent fibers are core-sheath composite fibers. It is a non-woven fabric formed of a composite fiber containing fibers as a first component of a core and a second component of a sheath portion. If it is a core-sheath composite fiber, the melting point of the sheath component can be lower than the melting point of the core component. In this case, by melting only the sheath portion, the component can be easily welded without breaking. It is easy to fix, so it is better. Examples of the core-sheath type composite fiber having a melting point lower than that of the core include, for example, polyester, polypropylene, cellulose, and nylon for the core and polyethylene, polystyrene, and the like for the sheath. Composite fiber. In the composite fiber having the above-mentioned configuration, it is preferable that the component of the core is a component having a melting point higher than that of the component of the sheath by 20 ° C or more. By using such a composite fiber, only the sheath portion can be melted without occurring Welding fractured.

The manufacturing method of the molded activated carbon cartridge is described by taking a wet molding method in which a slurry containing activated carbon is sucked and molded. The overall process outline is a manufacturing method in which a slurry is sucked to deposit activated carbon or the like to obtain a cylindrical shaped activated carbon precursor, and the shaped activated carbon precursor is dried to prepare a shaped activated carbon, and the resulting shaped product is molded. The packaging material is wound around the activated carbon to obtain a shaped activated carbon cartridge.

First, a fibrous binder, activated carbon, and water are mixed to prepare a slurry. The fibrous adhesive can also be adjusted with a beater before the pulp is prepared. The concentration of the solid content in the slurry is preferably 1% by mass or more and 10% by mass or less. If the solid content concentration is less than 1% by mass, it takes time to form and the production efficiency deteriorates. If the solid content concentration is higher than 10% by mass, it is difficult to stir the slurry uniformly, and it is difficult to obtain a uniform shaped activated carbon.

As for the method for sucking the slurry, a method of sucking the slurry through a cylindrical forming mold having a plurality of small holes may be mentioned, or it may flow into a sleeve type container including an outer tube and an inner tube having a plurality of small holes. Method for suctioning slurry and the like.

The drying temperature of the formed activated carbon precursor is preferably 90 ° C or higher and 140 ° C or lower. If the drying temperature becomes higher than 140 ° C, the fibrous adhesive may be modified. When the drying temperature is less than 90 ° C, the drying speed decreases and the efficiency deteriorates.

In the step of packaging the formed activated carbon, a method of applying a tension of 2 gf / mm or more to the packaging material and winding it in a circumferential direction outside the formed activated carbon is preferred. By winding the packaging material while applying tension in the circumferential direction, stress is generated in the radial direction from the outer peripheral side of the formed activated carbon due to the tight winding. With this stress, the effect that the packaging material supports forming the activated carbon is obtained for the load generated from the inner peripheral side to the outer peripheral side during the passage of water, and the pressure resistance performance of 0.1 MPa or more is exerted.

As a method of applying tension, there is a method in which a jump roller is provided between a winding-out portion of a raw material roll wound with a packaging material and a formed body as a winding portion, and a fixed tension is applied by controlling a winding-out speed of the packaging material. ; Or a method of applying a fixed tension by controlling the torque of the unwinding part. There is also a method of winding the packaging material around the formed activated carbon, and applying tension to the direction opposite to the unwinding to reduce the torque of the winding portion, but there is a stress generated by the winding in the circumferential direction of the formed activated carbon. The situation.

By wrapping the packaging material in a state of being wound more than one turn on the shaped activated carbon, the packaging material can be fixed to the outer periphery of the shaped activated carbon in a rolled state by tension. Examples of the adhesion method include a method using an adhesive or hot melting, or heat welding or ultrasonic welding. When the above-mentioned non-woven fabric is used as the packaging material, it is preferable from the viewpoint of operability or manufacturing efficiency to use a method using heating or ultrasound.

Since the end portion of the shaped activated carbon cartridge is adhered to the cover member as needed, and is accommodated in a container for water flow, water can flow from the inner peripheral side to the outer circumferential side of the shaped activated carbon without leakage.

    [Example]    

Each characteristic value is measured by the following method.

    (1) Withstand voltage test    

Cover members are adhered to both ends of the formed activated carbon box and are housed in a container for water flow. The path passing the water in a diameter direction from the inner peripheral side to the outer peripheral side of the cylindrical shaped activated carbon case is set as the filtering side path, and the water pressure on the upstream side of the shaped activated carbon case at this time and the filtering side as the downstream side It is set so that the difference in water pressure becomes 0.1 MPa. By changing the flow path of the water-passing container, the inner peripheral side of the formed activated carbon cartridge is allowed to pass water only in the entire length direction, and the path that does not pass through the filter material portion of the formed activated carbon cartridge is set as the raw water side path. Repeatedly switch the water flow for 1 second in the raw water path and the water flow for 1 second in the filter side path. Repeat a total of 3650 times to confirm whether the formed activated carbon after water flow is damaged. For confirmation of damage, peel off the packaging material of the formed activated carbon box, visually observe the surface of the formed activated carbon, and judge that the surface of the formed activated carbon has no cracks or nicks as "no damage", and evaluate the pressure resistance to 0.1. MPa or more, and a case where cracking or chipping was confirmed was judged to be "broken", and the pressure resistance was evaluated to be less than 0.1 MPa. In the case where the removal performance of free residual chlorine is measured after the pressure test, the measurement is performed before the packaging material is peeled off, and the damage is confirmed after the packaging material is peeled off after the measurement.

    (2) Determination of the elastic modulus of packaging materials    

The packaging material in a dry state with an effective length of 50 mm and a width of 50 mm was subjected to a tensile test at a speed of 50 mm / min. The measurement was performed using a tensile tester (manufactured by A & D, STA-1150) at an ambient temperature of 25 ° C. The elastic modulus (MPa) was calculated from the strain of the load on the sample and the thickness of the packaging material according to the following formula 1. The value of the elastic modulus at the time point when the weight was 2 gf / mm, that is, 100 gf / 50 mm was used as the elastic modulus of the sample. This operation was repeated for 10 samples of the packaging material, and the arithmetic mean was taken as the result.

Formula 1: E = σ / ε = {F / (S × G)} / (△ x / x)

E: modulus of elasticity (MPa) σ: stress (MPa) ε: strain (-)

F: weight bearing (gf) G: gravity acceleration (m / s ² ) S: cross-sectional area (m ² )

△ x: displacement (m) x: initial effective length (m)

    (3) Determination of particle size distribution    

A laser diffraction type particle size distribution measuring device ("SALD-3100" manufactured by Shimadzu Corporation) was used to determine the 50% particle size (central particle size) in the cumulative particle size distribution based on volume.

    (4) Measurement of free residual chlorine removal performance    

The free residual chlorine removal performance of the formed activated carbon cartridge was measured at a flow rate of 3 L / min in accordance with JIS S 3201: 2017.

    [Material]    

Activated carbon A: powder activated carbon with a central particle size of 140 μm and an iodine adsorption capacity of 1500 mg / g

Fibrous adhesive: acrylic fiber ("BiPUL" manufactured by Toyobo Co., Ltd.)

Non-woven fabric A: Polyester non-woven fabric with an elastic modulus of 1.0 MPa and a thickness of 0.2 mm

Non-woven fabric B: Non-woven fabric containing a core-sheath composite fiber made of polyethylene (sheath component) and polyester (core component) with an elastic modulus of 0.9 MPa and a thickness of 0.3 mm

Non-woven fabric C: Non-woven fabric with a core-sheath composite fiber made of polyethylene (sheath component) and polyester (core component) with an elastic modulus of 0.4 MPa and a thickness of 0.3 mm

    [Example 1]    

Activated carbon A and a fibrous adhesive were put into water at a ratio of 95: 5 on a mass basis, and mixed to prepare a slurry. The solid content concentration in the slurry was set to 3% by mass. The slurry was sucked through a cylindrical forming mold having a plurality of small holes to produce a cylindrical shaped activated carbon precursor having an outer diameter of 30 mm, an inner diameter of 10 mm, and a total length of 120 m. . The shaped activated carbon precursor was dried in a drying furnace at 120 ° C. for 5 hours to obtain a shaped activated carbon. A non-woven fabric C was used as a packaging material on the outer periphery of the formed activated carbon, and a tension of 2.0 gf / mm was applied for two turns to obtain a formed activated carbon cartridge.

After the pressure resistance test was performed, the removal performance of free residual chlorine was measured. As a result, the removal rate was 99%, and the filtration performance was good. After measuring the free residual chlorine removal performance, the packaging material of the formed activated carbon cartridge was peeled off, and the surface of the formed activated carbon was visually observed. As a result, the surface of the formed activated carbon was not damaged.

    [Example 2]    

A shaped activated carbon cartridge was obtained in the same manner as in Example 1 except that non-woven fabric A was used as a packaging material on the shaped activated carbon and a tension of 2.0 gf / mm was applied for one turn. When the nonwoven fabric was wound around the outer periphery of the formed activated carbon and fixed by welding, it took slightly more time than in Example 1.

After the pressure resistance test was performed, the removal performance of free residual chlorine was measured. As a result, the removal rate was 99%, and the filtration performance was good. After measuring the free residual chlorine removal performance, the packaging material of the formed activated carbon cartridge was peeled off, and the surface of the formed activated carbon was visually observed. As a result, the surface of the formed activated carbon was not damaged.

    [Example 3]    

A formed activated carbon cartridge was obtained in the same manner as in Example 1 except that non-woven fabric B was used as a packaging material on the formed activated carbon, and a tension of 2.0 gf / mm was applied for one turn. Since the nonwoven fabric B is wound only once around the outer periphery of the molded activated carbon, it can be produced more efficiently than in Example 1.

After the pressure resistance test was performed, the removal performance of free residual chlorine was measured. As a result, the removal rate was 99%, and the filtration performance was good. After measuring the free residual chlorine removal performance, the packaging material of the formed activated carbon cartridge was peeled off, and the surface of the formed activated carbon was visually observed. As a result, the surface of the formed activated carbon was not damaged.

    [Example 4]    

A shaped activated carbon cartridge was obtained in the same manner as in Example 1 except that non-woven fabric B was used as a packaging material on the shaped activated carbon, and a tension of 0.5 gf / mm was applied for two turns.

After the pressure resistance test was performed, the removal performance of free residual chlorine was measured. As a result, the removal rate was 99%, and the filtration performance was good. After measuring the free residual chlorine removal performance, the packaging material of the formed activated carbon cartridge was peeled off, and the surface of the formed activated carbon was visually observed. As a result, the surface of the formed activated carbon was not damaged.

    [Comparative Example 1]    

A molded activated carbon cartridge was obtained in the same manner as in Example 1 except that the packaging material was not wound around the molded activated carbon.

When the pressure resistance test was performed, the surface of the formed activated carbon was directly observed because the packaging material was not wound, and as a result, the surface was cracked. The determination of the free residual chlorine removal performance was continued, and as a result, the removal rate of free residual chlorine was 45%, which was low. It is considered that the cracking occurred on the surface of the formed activated carbon, and the filtration performance was deteriorated due to leakage of raw water.

    [Comparative Example 2]    

A formed activated carbon cartridge was obtained in the same manner as in Example 1 except that non-woven fabric B was used as a packaging material on the formed activated carbon, and a tension of 0.5 gf / mm was applied for one turn.

The free residual chlorine removal performance was measured after the pressure resistance test. As a result, the removal rate of free residual chlorine was 51%, which was low. After measuring the free residual chlorine removal performance, the packaging material of the formed activated carbon cartridge was peeled off, and the surface of the formed activated carbon was visually observed. As a result, the surface of the formed activated carbon was cracked. It is considered that since cracks occurred on the surface of the formed activated carbon, the filtration performance was deteriorated due to leakage of raw water.

    [Comparative Example 3]    

A shaped activated carbon cartridge was obtained in the same manner as in Example 1 except that non-woven fabric C was used as a packaging material on the shaped activated carbon and a tension of 2.0 gf / mm was applied for one turn.

The free residual chlorine removal performance was measured after the pressure resistance test was performed. The removal rate of free residual chlorine was 55%, which was low. After measuring the free residual chlorine removal performance, the packaging material of the formed activated carbon cartridge was peeled off, and the surface of the formed activated carbon was visually observed. As a result, the surface of the formed activated carbon was cracked. It is considered that the cracking occurred on the surface of the formed activated carbon, and the filtration performance was deteriorated due to leakage of raw water.

The results of the above examples and comparative examples are shown in Table 1. Examples 1 to 4 which did not break in the pressure test showed excellent free residual chlorine removal performance. In Examples 2 and 3, since the type of the packaging material was changed from Example 1 to a non-woven fabric having an elastic modulus of 0.8 MPa or more, the ability to suppress deformation from the inside to the outside of the formed activated carbon was high, and as a result, it was possible. The number of windings per turn satisfies the pressure resistance. In Example 2, since the component of the non-woven fabric was changed from that in Example 1 to polyester-only fibers instead of the core-sheath composite fiber, the defect that the non-woven fabric was broken easily occurred under the condition that the polyester was rapidly melted. Therefore, in Example 2, it takes time to melt only the surface and adhere under the condition that the polyester is slowly melted, and the packaging step takes time. The tension of the non-woven fabric wound around the formed carbon in Example 4 is smaller than that in Example 1, but by winding two turns of the non-woven fabric with an elastic modulus of 0.8 MPa or more, the deformation from the inside to the outside of the formed activated carbon is suppressed. The capacity is sufficient, so it exhibits pressure resistance.

Comparative Example 1 had no effect of suppressing deformation at all because the packaging material was not wound, and as a result, the pressure resistance performance was not exhibited. In Comparative Example 2, since the nonwoven fabric was wound around the outer periphery of the formed carbon with a small tension and was packaged only once, the ability to suppress the deformation of the formed activated carbon was insufficient, and as a result, the pressure resistance was not exhibited. In Comparative Example 3, since only one non-woven fabric having an elastic modulus of less than 0.8 MPa was packaged, the ability to suppress deformation of the formed activated carbon was insufficient, and as a result, the pressure resistance performance was not exhibited.

Although the present invention has been described in detail and with reference to specific implementation aspects, the industry understands that various changes or modifications can be added without departing from the spirit and scope of the present invention. This application is based on a Japanese patent application filed on March 28, 2018 (Japanese Patent Application No. 2018-061427), the contents of which are incorporated herein by reference.

    (Industrial availability)    

The formed activated carbon cartridge of the present invention can be preferably used as a filter for removing free residual chlorine and the like in tap water.

Claims (5)

    A shaped activated carbon box comprising a cylindrical shaped activated carbon containing activated carbon and a fibrous binder, and a packaging material wound around the outer periphery of the shaped activated carbon, and from the inside of the shaped activated carbon box. The space has a pressure resistance of 0.1 MPa or more when water is passed through the molded activated carbon and the packaging material to the outside of the molded activated carbon box.         For example, the shaped activated carbon cartridge of claim 1, wherein the elastic modulus of the packaging material is 0.8 MPa or more.         The activated carbon cartridge of claim 1 or 2, wherein the packaging material is a non-woven fabric.         The shaped activated carbon cartridge according to claim 3, wherein the fibers constituting the non-woven fabric are core-sheath type composite fibers.         A method for manufacturing a shaped activated carbon box, which is wound around a cylindrical shaped activated carbon containing activated carbon and a fibrous adhesive, and a packing material is wound with a tension of 2.0 gf / mm or more in the circumferential direction. .