JP2008229568A - Flexible basket-shaped resin pipe filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible basket-shaped resin pipe filter hard to cause clogging and easy to maintain, and various systems using the filter. <P>SOLUTION: Resin monofilaments are braided on a flexible mandrel only by weft yarns and, after the braided material is heat-treated, the flexible mandrel is pulled out to form a flexible perforated resin pipe comprising a resin material braided in a basket shape. One end part of the flexible perforated resin pipe is sealed to form the flexible basket-shaped resin pipe filter having no joined parts between the monofilaments. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a filter that is installed in a fluid to separate and remove foreign substances in the fluid, and a waste liquid treatment system that uses the filter.

  Conventionally, metal mesh screens have been widely used as filtration filters for separating and removing foreign substances in fluids in waste liquid treatment systems such as factories and circulation systems for bathtubs and pools.

  For example, a waste liquid treatment system may include a microbial carrier treatment tank in which a particulate carrier that holds a high concentration of microorganisms for removing BOD (biological oxygen demand) is dispersed. In general, a flat metal mesh screen is used as a filter for preventing discharge from the tank together with the treatment liquid. Also, in circulation systems such as bathtubs and pools, a filtration device called a strainer or hair catcher is installed in the middle of the pipe to remove foreign substances in the fluid. Normally, however, a cylindrical metal is used as a filtration filter for this strainer or the like. A mesh screen is used.

  However, the conventional mesh screen as described above is clogged because it is difficult to secure a sufficient filtration area due to restrictions on the scale of the apparatus to be installed and because it is fixedly installed in the apparatus. Because it is easy, it is necessary to frequently clean and replace the screen, and the burden of maintenance is large. In addition, in a so-called hair catcher, which is a filtration device used particularly in a circulation system of a bathtub, since pathogenic bacteria easily propagate from the usage environment, there is a problem in terms of hygiene when cleaning the filter portion. Even if the filter part is replaced without cleaning in consideration of hygiene, the cost burden increases.

  On the other hand, although not directly related to the above technical field, it has been proposed to use a net-like resin pipe formed by braiding a resin monofilament or the like as a water guide pipe embedded in a permeable paved road (for example, Patent Document 1). reference). This reticulated resin pipe has a selective permeability to prevent the intrusion of foreign materials such as sand and gravel, and a flexibility (flexibility) for installing on uneven surfaces and bending piping. Suitable for conduit pipes.

JP 2001-254873 A

  The inventor of the present case has studied the possibility of being used as a filter member because the reticulated resin tube has selective permeability and flexibility, and has come to make the present invention. That is, the present invention seals one end of a flexible resin tube, and uses this as a filtration membrane to provide a resin tube filter that is less likely to be clogged and easy to maintain, and a waste liquid treatment system using the filter. The purpose is to provide.

  In order to achieve the above-described object, a flexible bowl-shaped resin pipe filter according to the present invention seals one end of a flexible perforated resin pipe made of a resinous material knitted into a bowl shape. It is formed with.

  According to this configuration, since almost the entire peripheral surface of the resin tube filter becomes a filtration surface, the filtration area with respect to the installation space can be greatly increased. Further, since the perforated resin tube constituting the filter has a flexible structure, that is, a structure that bends elastically and flexibly, the filter is less likely to be clogged by being shaken by the flow of fluid. Therefore, the maintenance burden on the filter is reduced.

  In the resin pipe filter according to the present invention, the numerous holes of the perforated resin pipe may be formed by stitch-like gaps. The perforated resin tube is preferably formed by braiding resin monofilaments and does not have a portion joined between the monofilaments. By adopting such a configuration, the resin tube filter can be configured to be more flexible, and further, the filter hole itself is deformed within a certain range as the filter swings, so clogging is more effective. Can be prevented.

  Further, in the resin pipe filter according to the present invention, the porous resin pipe is formed by braiding a resin monofilament on a flexible mandrel that is a winding core only with a weft and heat-treating, and joining between the monofilaments It may have a diamond-shaped continuous stitch structure without any part and warp. By forming the perforated resin tube constituting the resin tube filter in this way and having a structure without warp, the flexibility in the bending direction of the resin tube filter is increased and the resilience in the twisting direction is increased. . Therefore, even if bending, twisting, or entanglement between resin tube filters occur due to swinging, a decrease in filtration performance due to blockage of the resin tube is suppressed.

  In order to form the resin tube filter according to the present invention, the porous resin tube can be sealed by bundling one or a plurality of tubes, deforming and binding them at the end, or melt bonding. By sealing by these methods, a resin pipe filter can be formed by a simple process. In particular, when sealing by melt bonding, a resin tube filter can be formed of a single material, which is convenient for processing such as disposal and recycling.

  The filter structure according to the present invention is installed in a fluid passage, and the ridge-shaped resin tube filter, the nipple to which the other open end of each filter is connected, and the fluid before and after passing through the filter And a pipe connection member having a partition plate for partitioning the stock solution and the filtrate. By using the bowl-shaped resin pipe filter connected to a pipe connecting member having a partition plate, leakage of fluid to be filtered can be effectively prevented with a simple structure, and filtration can be performed reliably.

  In the filter structure, it is preferable that each of the plurality of perforated resin tube filters connected to the tube connecting member having a plurality of nipples has a length that is five times or more the inner diameter. By setting it as such length, attachment to the pipe connection member of a resin pipe filter becomes easy, and sufficient filtration area can be ensured.

  In the waste liquid treatment system according to the present invention, the filter structure for preventing the microbial carrier from flowing out of the tank is installed between the microbial carrier treatment layer for waste liquid treatment and the drainage system. By installing the filter structure in the microorganism carrier treatment tank, the maintenance burden on the waste liquid treatment system can be reduced as compared with the conventional filter.

  In the waste liquid treatment system, preferably, the porous resin tube filter of the filter structure protrudes toward the inside of the tank, and the treated water discharged from the microorganism carrier treatment tank is an outer surface of the porous resin pipe. It is set to pass from the inside to the inside. By installing the filter structure in this way, the resin pipe filter can be used interchangeably with a conventional filter even in existing equipment. In particular, in the microbial carrier treatment tank, an air flow is usually generated in the vertical direction in order to aerate microorganisms, so that the resin tube filter installed in the tank has a large swing and prevents clogging more effectively. Is done.

  As described above, according to the flexible bowl-shaped resin pipe filter, the filter structure, and the waste liquid system according to the present invention, it is possible to prevent clogging of the filter by increasing the filtration area and oscillating the filter. Therefore, it becomes possible to greatly reduce the maintenance burden of the resin pipe filter.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings. However, the present invention is not limited to this configuration.

  FIG. 1 is a perspective view showing an embodiment of a bowl-shaped resin pipe filter according to the present invention. This bowl-shaped resin pipe filter 1 is knitted in a bowl shape, and one end of a flexible resin pipe having a large number of holes formed by stitches is sealed by fusion bonding to form a tip portion 1a, and the other end is By forming the open end 1b in an open state, it is formed so as to function as a filter that filters the fluid by passing through the tube wall.

  As schematically shown in FIG. 2, the resin tube 11 that forms the basic structure of the saddle-shaped resin tube filter 1 is composed of resin monofilaments 15 wound around a plurality of bobbins 14 using only weft yarns without using warp yarns. The flexible mandrel 16 is braided on a long flexible mandrel 16 serving as a winding core, heat-treated, and then the flexible mandrel 16 is extracted in the axial direction (direction of arrow C). The heat treatment is preferably performed at 150 ° C. to 240 ° C. for 10 to 120 minutes, and by performing such treatment, the inner surface of the resin tube 11 is made into a smooth reticulated tube state to suppress the inner surface strength. The amount of drainage can be improved. Further, the resin tube 11 is formed without using warp yarns as described above, so that the resin tube 11 has a substantially rhombic continuous stitch having apexes in the longitudinal direction and the circumferential direction of the resin tube 11, and between the monofilaments. Since there is no part to join, it has a very flexible structure.

  Here, the resin monofilament refers to a linear body composed of any single resin fiber, and representative materials include polypropylene (PP), polyethylene (PE), polyester terephthalate (PET), polybutylene terephthalate (PBT), polyamide ( Ny) and vinylon (PVA fiber). PP, PET, and Ny are particularly suitable from the viewpoint of versatility and durability, but are not limited thereto.

  Further, the thickness of the resin monofilament 11 can be appropriately selected in consideration of the balance between the holding force of the tube shape and the flexibility in relation to the assumed inner diameter of the resin tube, but in this embodiment, the outer diameter is 0. The range is 1 mm to 5.0 mm.

  The flexible mandrel is a winding core that can be flexibly bent, and can be flexibly bent. Therefore, a long reticulated resin tube can be formed in a relatively narrow space. The material of the flexible mandrel 16 is preferably a material that is not easily deformed by heat treatment and has a slipperiness that facilitates the extraction process. Typical examples include a resin tube formed of a resin (heat resistant resin) having a heat deformation temperature higher than that of a resin monofilament, a metal flexible tube, or a heat resistant composite tube in which the surface of the metal flexible tube is coated with a heat resistant resin. In view of durability and slipperiness during extraction, it is preferable to use a heat resistant composite tube, and a heat resistant composite tube coated with a fluororesin as a heat resistant resin is particularly preferable.

  As a sealing method of the resin tube tip part which becomes the tip part 1a of the bowl-shaped resin tube filter 1, various generally known methods, for example, insertion of a sealing material (rubber plug or the like) inside the tube, outside the tube 1 can be used, such as tightening and sealing with a wire rod (wire, insulation lock tie, etc.), press sealing with metal fittings, fusion bonding of the resin tube 11, etc. In the embodiment of FIG. It is sealed. When melt bonding is used, the sealing portion is made of the same material as the other portions of the resin tube 11, so that the separation and collection after use of the bowl-shaped resin tube filter 1, incineration, disposal, recycling processing, etc. Is convenient.

  As shown in FIG. 3, this bowl-shaped resin pipe filter 1 is used as a filter structure 9 by connecting the opened base end 1 b to a single pipe connecting member 3. The single pipe connecting member 3 includes a nipple 3a that is a connecting portion with the bowl-shaped resin pipe filter 1 and a bowl-shaped partition formed at the end of the nipple 3a opposite to the side to which the resin pipe filter 1 is connected. It is comprised with the board 3b. As will be described later, the partition plate 3b has a function of partitioning the liquid before and after the bowl-shaped resin tube filter 1 in the liquid passage. The shape of the nipple that is the connecting portion is generally a bamboo shoot shape in which a plurality of annular irregularities are formed on the outer peripheral surface. However, in this embodiment, when pressed in the length direction, the braided joint angle widens and the inner diameter increases. The cylindrical nipple 3a is used in order to utilize the characteristic of the resin pipe that the inner diameter is reduced when it is enlarged and pulled in the length direction.

  Specifically, the outer diameter of the nipple 3a of the single pipe connecting member 3 is set to a range approximately equal to 1.2 times the inner diameter of the opened proximal end portion 1b of the free bowl-shaped resin pipe filter 1. The length of the nipple 3a is set to 1.5 times or more of the inner diameter of the base end portion 1b, and the base end portion 1b of the bowl-shaped resin tube filter 1 is put on the nipple 3a, and then the direction of the tip end portion 1a is set. The hook-shaped resin pipe filter 1 is fixed to the single pipe connecting member 3 by pulling the cup-shaped resin pipe filter 1 to the right. That is, by using the nipple 3a having the shape and size as described above, practically sufficient fixation can be performed without performing secondary processing such as adhesion.

  As the pipe connecting member, in addition to the pipe connecting member 3 used alone as shown in FIG. 3, a composite pipe connecting member 5 in which a plurality of nipples 5a are integrally formed as shown in FIG. 4 may be used. As the material of the single pipe connecting member 3 and the composite pipe connecting member 5, any material can be used as long as it is a hard material. However, PP, PE, PET, etc. are particularly preferable in terms of durability and discardability. Is preferred.

  When the composite pipe connecting member 5 is used, as shown in FIG. 5, the tip portions 1a of the plurality of bowl-shaped resin pipe filters 1 are respectively sealed by the above-described general sealing method, for example, melt bonding. What has been stopped may be connected to each nipple 5a of the composite pipe connecting member 5 to form a filter structure 9A. Alternatively, as shown in FIG. 6, the base end portion 1b of a plurality of resin pipes is connected to the nipple 5a of the composite pipe connecting member 5, and the distal end portions 1a are gathered together to form a wire rod (wire, insulation lock tie, etc.) A plurality of resin tube filters 1 are integrated by sealing by tightening sealing with metal, press sealing with metal fittings, or fusion bonding of a resin monofilament tube (in the embodiment of FIG. 6, sealing with an insulation lock tie 8). It is good also as the filter structure 9B which formed the bowl-shaped resin pipe filter bundle 7 of the state.

  When the filter structure 9A of FIG. 5 is used, since the plurality of bowl-shaped resin tube filters 1 are not bound to each other, the resin tube filters 1 are swung by the flow of fluid, and the resin tube filters 1 are used. , The contact and friction between the filters makes it very difficult to clog the filter. 9 A of filter structures which have such a form and characteristic are suitable for the use installed and used in a comparatively wide space. For example, in a waste liquid treatment system in which a fluid moves between tanks, it is installed in the tank as a filter for preventing the carrier from flowing out of the tank containing the carrier. On the other hand, since the filter structure 9B of FIG. 6 integrates the plurality of resin pipe filters 1 to form the filter bundle 7, handling such as assembly becomes easy. Therefore, it is suitable for an application where it is installed and used in a relatively narrow space, such as a piping system such as a strainer. 5 and 6, the partition plate 5b of the composite pipe connecting member 5 of the filter structures 9A and 9B has a disc shape. However, the shape may be appropriately changed according to the structure of the apparatus in which the filter structure is installed. It can be changed.

  An embodiment of a waste liquid treatment system using a bowl-shaped resin pipe filter according to the present invention will be described with reference to FIGS. FIG. 7 schematically shows a part of the configuration of a waste liquid treatment system in which the bowl-shaped resin pipe filter 1 according to one embodiment of the present invention is used. Waste liquid discharged from a discharge source such as a factory is first introduced into the raw water adjustment tank 51, subjected to pretreatment such as oil removal and contaminant removal, and then transferred to the microorganism carrier treatment tank 53. In the microorganism carrier treatment tank 53, the organic matter is decomposed by contacting the waste liquid with the microorganisms held on the carrier under aerobic conditions (generally by generating an air flow for aeration), and the treatment liquid is filtered. It is discharged to the sedimentation tank 55 through the structure 9C.

The microbial carrier treatment tank 55 and the microbial carrier contained therein may be of any conventional form. For example, as the microbial carrier, one type of carrier selected from a gel carrier, a plastic carrier and a fibrous carrier, or a combination of two or more of them can be used. In this embodiment, PVA bacterial colony particles having a particle diameter of about 3 mm were used as a carrier, and about 30,000 particles of this carrier were dispersed in a tank per 1 m ³ .

  As shown in FIG. 8, the filter structure 9C attached to the microorganism carrier treatment tank 53 has a plurality of cylindrical nipples 45a and a partition plate 45b which is a rectangular resin plate, and each nipple 45a has a plurality of Each of the bowl-shaped resin pipe filters 1 is attached and configured. The partition plate 45b has a function of partitioning the liquid before and after the bowl-shaped resin tube filter 1 in the liquid passage. In this embodiment, as a resin tube, a PET monofilament 15 having an outer diameter of 0.8 mm is braided on a fluororesin flexible mandrel 16 having an outer diameter of 20 mm and a length of 25 m as shown in FIG. 30 pieces of resin tubes 11 having an inner diameter of 20 mm, a length of 25 m, and an intersection angle of 112 °, obtained by extracting the flexible mandrel 16 after being subjected to heat treatment at 0 ° C. for 0.5 hours and fixed in shape, each tip In a state of being pressed from the side and contracted, it was pressed against a hot plate at 300 ° C. and sealed by melt bonding to obtain a bowl-shaped resin tube filter 1. The nipple 45a used was a PP pipe having an outer diameter of 22 m and a length of 50 mm, and each base end portion of the nipple 45 a was joined and arranged on a 75 mm × 250 mm partition plate 45 b to obtain a composite pipe joining member 45. The plurality of nipples 45a in the composite pipe joining member 45 are preferably arranged so that the plurality of resin pipe filters 1 attached thereto are arranged in a close-packed state. By arranging in this way, the frequency with which the resin tube filters 1 come into contact with each other increases, so that clogging can be more effectively prevented.

  As shown in FIG. 9, a recess is formed in the central upper portion of the partition wall 61 that separates the microorganism carrier treatment tank 53 and the precipitation tank 55, and the treated water treated in the microorganism carrier treatment tank 53 is discharged to the precipitation tank 55. A discharge groove 63 is provided. A pair of filter support portions 65, 65 are provided so as to substantially extend along both inner side surfaces of the discharge groove 63 and to the inside of the microorganism carrier treatment tank 53, and the fitting grooves 67 of the filter support portions 65, 65 are provided. 67, the filter structure 9C is installed in the microorganism carrier tank 53 by fitting both end portions of the partition plate 45b of the filter structure 9C. In addition, the structure of the part except the filter structure 9C of the waste liquid processing system 50 is the same as that of the existing thing which used the metal mesh screen. That is, in the existing system, the mesh screen fitted in the fitting grooves of the filter support portions 65 and 65 is replaced with the filter structure 9C to obtain the waste liquid treatment system according to this embodiment. Therefore, the filter structure 9C of the present embodiment can be easily attached to the existing waste liquid treatment system.

  In this waste liquid treatment system, the treated water that has reached the periphery of the bowl-shaped resin pipe filter 1 of the microorganism carrier treatment tank 53 is blocked by the partition plate 45b and reliably discharged to the sedimentation tank 55 via the resin pipe filter 1. Is done. Since the resin tube filter 1 protrudes into the microorganism carrier treatment tank 53, the treated water in the microorganism carrier treatment tank 53 passes from the outside to the inside of the resin tube filter 1 when being discharged from the discharge groove 63 to the sedimentation tank 55. At this time, the microbial carrier in the microbial carrier treatment tank 53 is captured outside the resin tube filter 1 and is prevented from flowing out to the sedimentation tank 55.

  The filtration area of the filter structure 9C in the waste liquid treatment system 50 is greatly increased as compared with the filtration area of the conventional mesh screen (approximately equivalent to the area of the partition plate 45b), and a flexible bowl-shaped resin tube The filter 1 is greatly swung by the flow of treated water and the air flow for aeration. Moreover, in each resin tube filter, since there is no joint between the monofilaments, the hole shape also changes as the resin tube filter bundle 7 swings. Therefore, clogging due to the filtered carrier is extremely difficult to occur, and the burden on the filter cleaning operation is greatly reduced.

It is a perspective view which shows the bowl-shaped resin pipe filter which concerns on one Embodiment of this invention. It is a schematic diagram which shows the manufacturing method of the resin pipe | tube used for the bowl-shaped resin pipe | tube filter which concerns on one Embodiment of this invention. It is a perspective view which shows the filter structure which concerns on one Embodiment of this invention. It is a perspective view which shows the composite pipe connection member used for the filter structure which concerns on one Embodiment of this invention. It is a perspective view which shows the filter structure which concerns on other embodiment of this invention. It is a perspective view which shows the filter structure which concerns on other embodiment of this invention. It is the schematic which shows a part of structure of the waste liquid processing system which concerns on one Embodiment of this invention. It is a perspective view which shows the pipe connection member of the waste liquid processing system of FIG. It is a perspective view which shows the principal part of the waste liquid processing system of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Corrugated resin pipe filter 1a Tip part 1b Base end part 3 Single connection pipe member 3a, 5a, 45a Nipple 3b, 5b, 45b Partition plate 5 Composite connection pipe member 9, 9A, 9B, 45 Filter structure 11 Porous resin Tube 15 Resin monofilament 16 Flexible mandrel 53 Microbial carrier treatment tank

Claims (9)

  A flexible bowl-shaped resin pipe filter formed by sealing one end of a flexible porous resin pipe made of a resin material knitted into a bowl shape.   The flexible bowl-shaped resin tube filter according to claim 1, wherein a large number of holes of the perforated resin tube are formed by stitch-shaped gaps.   3. The flexible bowl-shaped resin tube filter according to claim 1, wherein the perforated resin tube is formed by braiding resin monofilaments and does not have a portion joined between the monofilaments.   3. The porous resin tube according to claim 1, wherein the resin monofilament is formed by braiding a resin monofilament on a flexible mandrel that is a winding core only with a weft and heat-treating the joint between the monofilament and the warp. A flexible bowl-shaped resin tube filter that does not have a rhombus continuous stitch structure.   The flexible bowl-shaped resin according to any one of claims 1 to 4, wherein the perforated resin tube is sealed by bundling one or a plurality of pipes and deforming and binding or melting and bonding the ends. Tube filter. A filter structure installed inside a fluid passage, wherein one or more bowl-shaped resin tube filters according to any one of claims 1 to 5,
A nipple to which the other open end of each filter is connected, and a pipe connecting member having a partition plate for partitioning the undiluted solution and filtrate as fluid before and after passing through the filter in the fluid passage;
A filter structure comprising:   7. The filter structure according to claim 6, wherein the pipe connecting member has a plurality of nipples, and each of the plurality of perforated resin pipe filters connected to the pipe connecting member has a length of five times or more of an inner diameter. body.   A waste liquid treatment system in which the filter structure according to claim 6 or 7 is installed between a microbial carrier treatment layer for waste liquid treatment and a drainage system to prevent the microbial carrier from flowing out of the tank.   In Claim 8, the porous resin pipe filter of the said filter structure protrudes in the inside of a tank, and the treated water discharged | emitted from the said microorganisms carrier processing tank passes from the outer surface of the said porous resin pipe to an inner surface. Waste liquid treatment system that is set up as follows.

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