JP2008246388A - Filter, filter cartridge, filtration apparatus, and its operation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter composed to prevent compaction, a filter cartridge, a filtration apparatus provided with the filter cartridge, and its operation method. <P>SOLUTION: The filter 1 is provided with a fiber assembly 2, reinforcing bodies 3 disposed in the fiber assembly 2, and perforated plates 6, 6 superposed on both end faces of the fiber assembly 2. Ion exchange fiber is preferable as the fiber assembly 2. The reinforcing body 3 has a rod 4 and extended bodies 5. Both ends of the rod 4 are connected to the perforated plates 6. Treating object water flows into the filter 1 via holes 6a of the one perforated plate 6, and filtrate flows out via holes 6a of the other perforated plate 6. The reinforcing bodies 3 provided in the filter 1 prevent compaction of the fiber assembly 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a filter having a fiber, a filter cartridge, a filtration apparatus including the filter cartridge, and an operation method thereof.

  As a filter for removing ions and fine particles from water, a filter made of an aggregate of ion exchange fibers having ion exchange groups is widely used (Patent Documents 1 and 2).

  In addition, a filter cartridge in which an ion exchange resin or a filter material is filled in the cartridge is also widely used (Patent Document 3).

  Patent Document 3 describes a multistage water treatment apparatus in which this filter cartridge is arranged in series in a cylindrical housing.

Patent Document 4 describes a water treatment element comprising a molded body obtained by binding ion exchange fibers and fiber activated carbon with a binder.
JP 2003-251120 A JP2007-44565 JP 2002-320960 A JP-A-6-246261

  When water is passed through a filter made of an aggregate of fibers, there is often a consolidation phenomenon that deforms so as to be gradually compressed in the water passing direction. In addition, even if it uses a binder like patent document 4, it is hard to avoid a compaction phenomenon.

  It is an object of the present invention to provide a filter and a filter cartridge configured to prevent such compaction, a filtration apparatus including the filter cartridge, and an operation method thereof.

  The filter of the present invention (Claim 1) is a filter having an assembly of fibers, wherein the assembly is provided with a reinforcing body for preventing the deformation of the assembly when a fluid to be filtered flows through the filter. It is characterized in that it is provided in the interior.

  The filter according to claim 2 is characterized in that, in claim 1, the reinforcing body has a rod extending in the flow direction of the fluid to be filtered in the aggregate, and an overhanging body protruding from the rod. To do.

  The filter according to a third aspect is the filter according to the second aspect, wherein the projecting body has a rod shape or a plate shape.

  A filter according to a fourth aspect is the filter according to the second or third aspect, wherein perforated plates are respectively arranged on both end faces of the aggregate in the flow direction of the fluid to be filtered, and both ends of the rod are connected to the perforated plates, respectively. It is characterized by that.

  A filter according to a fifth aspect is the filter according to any one of the first to fourth aspects, wherein the fiber is an ion exchange fiber.

  A filter cartridge according to a sixth aspect includes the filter according to any one of the first to fifth aspects, and a container surrounding at least a side periphery of the filter.

  According to a seventh aspect of the present invention, a plurality of filter cartridges according to the sixth aspect are arranged in series in a cylindrical housing.

  An operation method of the filtration device according to claim 8 is an operation method of the filtration device for circulating the fluid to be filtered through the filter cartridge according to claim 6, wherein when the filter cartridge is replaced, the flow direction of the fluid to be filtered is the highest. The filter cartridge on the upstream side is removed, the filter cartridge on the lower stage side is moved to the upstream side of the first stage, and the unused filter cartridge is arranged on the most downstream side.

  The filter and the filter cartridge of the present invention are provided with a reinforcing member for preventing consolidation deformation inside the filter, and the consolidation of the filter is prevented even when a fluid to be filtered such as water is circulated for a long period of time.

  Therefore, according to the filtration device provided with this filter cartridge, it is possible to suppress an increase in pressure loss over a long period of time and perform a filtration treatment operation stably.

  When replacing a filter cartridge of a filtration apparatus having a plurality of filter cartridges, according to the method of claim 8, the most upstream filter cartridge that has captured the most ions and fine particles is taken out, and the new filter cartridge is moved to the most downstream side. Since it is disposed, the filter function of each cartridge can be fully utilized, and a sufficiently filtered fluid can be discharged from the filtering device.

  Note that the filter of the present invention is suitable for filtration of liquids such as water, but can also be applied to filtration of gases such as air.

  Hereinafter, embodiments will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a part of the filter according to the embodiment in a cutaway state, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a perspective view of a part of the reinforcing body. . 4 and 5 are perspective views showing other examples of the reinforcing body.

  The filter 1 includes a fiber assembly 2 formed in a cylindrical shape, a reinforcing body 3 disposed in the fiber assembly 2, and perforated plates 6 and 6 that overlap both end faces of the fiber assembly 2. Yes.

  The fibers of the fiber assembly 2 may be any of polymer fibers (synthetic resin fibers), ion exchange fibers (polymer fibers having ion exchange groups introduced on the surface), metal fibers, ceramic fibers, activated carbon fibers, etc. In the case of performing the treatment, ion exchange fibers are preferable. As the ion exchange fiber, a nanofiber having a fiber diameter of, for example, about 10 to 800 nm is preferable, but is not limited thereto. Further, the length of the ion exchange fiber is not particularly limited. The fiber assembly is preferably one in which fibers are accumulated randomly. The fibers may be bound by a binder. Further, the fiber assembly may be a fiber composite containing ion exchange resin particles other than fibers, activated carbon particles, and the like.

  In this embodiment, the reinforcing body 3 includes a rod 4 and a rod-like projecting body 5 projecting radially from the rod 4.

  Both ends of the rod 4 are connected to the perforated plate 6 by welding, nut fastening or the like. The diameter of the rod 4 is preferably as thin as possible within a range that can ensure a reinforcing function. When the rod 4 is made of stainless steel, the diameter may be any diameter that does not break due to water resistance during use.

  In this embodiment, since a plurality of reinforcing bodies 3 are used, the overhanging length of the overhanging body 5 is relatively short. However, when a single reinforcing body is used, the overhanging body 5 is used. For example, the overhang length of the fiber assembly 2 may be increased to near the radius of the fiber assembly 2. The overhang body 5 may overhang in three or five directions. Further, the rod-like projecting body 5 is not limited to a straight rod shape, and may be branched into branches.

  It is to be noted that the reinforcing plate 3A provided with a plate-like, for example, disc-like overhanging body 7 as shown in FIG. 4, or the net plate 8 is attached to the rod-like overhanging body 5 as shown in FIG. The reinforcement body 3B etc. which were made can also be used. The branch-like projecting body and the branch surface are installed so as to intersect with the longitudinal direction of the rod 4, preferably in the vertical direction. As another aspect, for example, a spiral body can be used as the reinforcing body 3 without using the rod 4.

  Water to be treated flows into the filter 1 so that treated water flows in through the holes 6 a of one porous plate 6 and filtered water flows out through the holes 6 a of the other porous plate 6. . Since the filter 1 is provided with the reinforcing body 3, the fiber assembly 2 is prevented from being consolidated even when water is passed over a long period of time. That is, the cylindrical fiber assembly 2 is prevented from being compressed in the direction of reducing the height of the cylinder.

  In this embodiment, since the rod 4 is connected to the perforated plate 6 even if a force for compressing the fiber assembly 2 acts on the reinforcing member 3 as a force in the thrust direction, the reinforcing member 3 is the rod. 4 is prevented from moving in the thrust direction. In addition, the flow of the water which flows into the fiber assembly 2 is disperse | distributed by the porous plate 6, and filtration is performed efficiently.

  A woven fabric, a nonwoven fabric, a film having a fine particle removing function, or the like may be interposed between the fiber assembly 2 and the porous plate 6. In particular, when the filter cartridge of the present invention is used in a pure water production process, ion exchange fibers (preferably nanofibers) are used as the fibers of the fiber assembly 2, and the porous plate 6 and the fiber assembly 2 on the downstream side of the filter cartridge 10 are used. It is preferable to interpose a film having a function of removing fine particles between them.

  In order to manufacture the filter 1, it is preferable to manufacture a skeleton body in which the porous plates 6 and 6 are connected to both ends of the reinforcing body 3 and to spray and accumulate fibers on the skeleton body.

  FIG. 6 is a sectional view of a filter cartridge 10 in which the filter 1 is accommodated in a substantially cylindrical container (casing) 11. Openings 12 for inflow or outflow of water are provided at both end faces of the vessel body 11.

  In addition, the nonwoven fabric 13 is wound around the outer periphery of the filter 1, and the sealing material 14 surrounds the outside.

  The nonwoven fabric 13 may be a nonwoven fabric of ion exchange fibers. The nonwoven fabric 13 is for preventing the fibers from flowing out of the fiber assembly 2, but may be omitted. A woven fabric or a porous membrane may be used instead of the nonwoven fabric.

  The distribution resistance of the nonwoven fabric 13 and the sealing material 14 is preferably larger than the distribution resistance of the fiber assembly 2 in order to prevent water from short-passing.

  FIG. 7 is a cross-sectional view of a filtration device 20 in which a plurality of filter cartridges 10 are arranged in series in a cylindrical housing 21. An end plate 22 having an inlet 23 is detachably attached to one end side of the housing 21, and an end plate 24 having an outlet 25 is detachably attached to the other end side.

  The outer peripheral surface of the filter cartridge 10 and the inner peripheral surface of the housing 21 are sealed with a sealing material (not shown) such as an O-ring.

  Each filter cartridge 10 may have the same function or may have different functions. In the latter case, for example, an anion exchange filter cartridge and a cation exchange filter cartridge can be combined.

  When the filter cartridges 10 having the same function are arranged in series and water is passed, the performance of the filter cartridge 10 (10A) on the most upstream side is deteriorated the fastest. Therefore, when replacing the filter cartridge 10, the most upstream side It is preferable to remove the filter cartridge 10A from the housing 21 and shift the second and third filter cartridges 10B and 10C one by one to the upstream side and insert a new filter cartridge on the most downstream side.

  By doing in this way, the ion exchange capacity of each filter can fully be used, and a running cost can be reduced.

It is a perspective view which fractures | ruptures and shows a part of filter, filter cartridge, filtration apparatus, and its operating method which concern on embodiment. It is the II-II sectional view taken on the line of FIG. It is a perspective view of a reinforcement body. It is a perspective view of another reinforcement body. It is a perspective view of another reinforcement body. It is sectional drawing of a filter cartridge. It is sectional drawing of a filtration apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Filter 2 Fiber assembly 3, 3A, 3B Reinforcement body 4 Rod 5, 7 Overhang body 6 Perforated plate 10 Filter cartridge 20 Filtration apparatus

Claims (8)

In a filter having an assembly of fibers,
A filter provided with a reinforcing body for preventing consolidation deformation of the aggregate when a fluid to be filtered flows through the filter.   2. The filter according to claim 1, wherein the reinforcing body includes a rod extending in a flow direction of the fluid to be filtered in the aggregate, and a projecting body projecting from the rod.   3. The filter according to claim 2, wherein the projecting body has a rod shape or a plate shape.   In Claim 2 or 3, the perforated plate is respectively arrange | positioned at the end surface of the to-be-filtered process fluid distribution direction both ends side of the said aggregate, The both ends of the said rod are each connected with this perforated plate, It is characterized by the above-mentioned. filter.   5. The filter according to claim 1, wherein the fiber is an ion exchange fiber.   A filter cartridge comprising: the filter according to any one of claims 1 to 5; and a container surrounding at least a side periphery of the filter.   A filtration device comprising a plurality of filter cartridges according to claim 6 arranged in series in a cylindrical housing. A method for operating a filtration device for circulating a fluid to be filtered through the filter cartridge according to claim 6,
When replacing the filter cartridge, the filter cartridge on the most upstream side in the flow direction of the fluid to be filtered is removed, the filter cartridge on the lower stage side is moved to the upstream side, and the unused filter cartridge on the most downstream side. A method for operating a filtration device, characterized by comprising:

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