Filtration Membrane Device

Abstract

To provide a filtration membrane device which can be quickly and easily transported to and installed at a desired location. [Solution] The filtration membrane device 1 includes a laminate 110 in which at least a water collection pipe, a separation membrane, a supply-side flow path member, and a permeate-side flow path forming member are laminated, the laminate 110 is wound in a spiral shape, and a first foreign matter removal member 20 that is attached to the supply-side end of the membrane element 10 and removes foreign matter contained in the raw water W1. The first foreign matter removal member 20 has a mesh structure.

Description

[Technical field]

[0001] The present invention relates to a filtration membrane device. [Background technology]

[0002] Conventionally, when raw water such as pond water, river water, and seawater is used as domestic water including drinking water, separation membrane elements have been used as a means for removing impurities such as salts and microorganisms contained in the raw water. Various shapes of separation membrane elements, such as spiral type and flat membrane integrated type, have been developed according to the application and purpose.

[0003] For example, Patent Document 1 describes a membrane separation device that includes a plurality of flat permeable membrane cells that are vertically installed at intervals in a tank for a liquid to be treated, and a flexible cleaning body that is swingably supported between the flat permeable membrane cells. Patent Document 2 describes a membrane separation device that includes a plurality of membrane elements that are arranged at regular intervals so that the membrane surface of each separation membrane is in a vertical position, an aeration device installed below the membrane elements, and a liquid collection pipe connected to a filtration pump. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-327949 [Patent Document 2] JP 2012-205980 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, since conventional separation membrane devices are constructed by stacking a plurality of flat membrane elements, they have a certain size and weight, and therefore have the problem that it takes a certain amount of time to transport and install them at a desired location. In particular, in the event of an emergency such as a disaster, it is desirable to be able to transport and install a separation membrane device more quickly and easily.

[0006] SUMMARY OF THE PRESENT DISCLOSURE In order to solve the above problems, the present invention aims to provide a filtration membrane device that can be quickly and easily transported and installed at a desired location. [Means for solving the problem]

[0007] The filtration membrane device according to the present invention is a membrane element including a laminate in which at least a water collection pipe, a separation membrane, a feed-side flow path member, and a permeate-side flow path forming member are laminated, the laminate being wound in a spiral shape; A foreign matter removing member attached to an end of the supply side of the membrane element for removing foreign matter contained in the raw water; Equipped with. Effect of the Invention

[0008] According to the present invention, the filtration membrane device can be quickly and easily transported and installed at the desired location where the filtration process will be performed. [Brief description of the drawings]

[0009] [Figure 1] 1 is a diagram showing an example of a schematic configuration of a filtration membrane device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing an example of the configuration of a membrane element according to the present embodiment. [Diagram 3] FIG. 2 is a diagram showing the state of the filtration membrane device when the membrane element according to the present embodiment is placed in a pond. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A filtration membrane device according to a preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0011] [Example of filtration membrane device 1 configuration] Fig. 1 is a diagram showing an example of a schematic configuration of a filtration membrane device 1 according to this embodiment. Fig. 2 is a diagram showing an example of a configuration of a membrane element 10 according to this embodiment. Note that the filtration membrane device 1 and the membrane element 10 shown in Figs. 1 and 2 are both shown in schematic form, and the dimensional relationships and ratios may differ between the drawings.

[0012] The filtration membrane device 1 according to the present embodiment has a filtration function for separating and removing impurities from raw water, and is used, for example, in the case of generating water for daily use such as drinking water in daily life or in emergencies such as disasters. Examples of raw water include seawater, river water, pond water, lake water, groundwater, tap water, dam water, and sewage. In addition, examples of raw water include water pretreated with these, such as coagulation treated water, sedimentation treated water, sand filtered water, and membrane filtered water. Examples of impurities include microorganisms such as bacteria, protozoa, and viruses, organic matter, trace chemicals, salts, and inorganic matter such as metals. As shown in FIG. 1, the filtration membrane device 1 includes a membrane element 10, a first foreign matter removal member 20, a second foreign matter removal member 30, and a pump 40.

[0013] 2, the membrane element 10 is, for example, an elongated cylindrical body, and is formed to a size that a user can hold in one or both hands. The membrane element 10 includes a water collection pipe 100, a laminate 110, a supply side plug 120, and a permeation side plug 130. In this embodiment, one end side in the longitudinal direction of the membrane element 10 is referred to as the supply side to which raw water W1 before filtration is supplied, and the other end side in the longitudinal direction of the membrane element 10 is referred to as the permeation side to which permeated water W2 after filtration is discharged.

[0014] The laminate 110 includes a separation membrane 111, a permeate spacer 112, and a raw water spacer 113, which are laminated in this order. Specifically, a pair of separation membranes 111 are arranged facing each other with the permeate spacer 112 interposed therebetween. A raw water spacer 113 is arranged on the surface of one of the separation membranes 111 opposite to the permeate spacer 112. One end of the laminate 110 is bonded to the outer circumferential surface of the water collection pipe 100, and the laminate 110 is wound in a spiral shape with the one end as a fulcrum. In this embodiment, a filament winding used in a general membrane element is not attached to the outer circumferential portion of the laminate 110. The water collection pipe 100 is arranged along the central axis of the cylindrical membrane element 10. A plurality of through holes 101 for taking in the permeate W2 filtered by the separation membrane 111 are drilled at predetermined intervals in the longitudinal direction on the outer circumferential surface of the water collection pipe 100.

[0015] The separation membrane 111 has a large number of holes (voids), and impurities contained in the raw water W1 are removed by passing the raw water W1 from the supply side through the large number of holes, and the permeated water W2 from which the impurities have been removed is passed through the discharge side, which is the permeated water spacer 112 side. The separation membrane 111 allows, for example, water molecules and monovalent ions (Na + , Cl - The separation membrane 111 can sufficiently remove most of the larger substances (e.g., polyethylene, polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, polysulfone, cellulose acetate, polyamide, piperazine, etc.). For example, polymer materials such as polyethylene, polypropylene, polytetrafluoroethylene, polyvinylidene fluoride, polysulfone, cellulose acetate, polyamide, piperazine, etc. can be used for the separation membrane 111. These polymers may be used as a single-layer membrane made of a single material, or as a composite membrane in which multiple membranes made of a single or different polymers are laminated. Furthermore, it is also possible to use a membrane in which the hydrophilicity, charge, etc. of the membrane surface is modified by adding various modifying groups to the surface of the polymer.

[0016] The permeate spacer 112 is made of a mesh sheet and is formed to have a size that is the same as or slightly smaller than the outer shape of the separation membrane 111. The permeate spacer 112 prevents the separation membranes 111 from approaching or contacting each other when the space between the pair of separation membranes 111, 111 becomes negative pressure, thereby forming a flow path for the permeate W2 filtered by the separation membrane 111. The permeate spacer 112 is made of, for example, a polymer net.

[0017] The raw water spacer 113, like the permeate spacer 112, is made of a mesh sheet and is formed to have the same outer shape as or slightly smaller than the separation membrane 111. The raw water spacer 113 forms a flow path that supplies the raw water W1 taken in from the supply side end of the membrane element 10 to the separation membrane 111. The raw water spacer 113 is made of, for example, a polymer net.

[0018] The supply side plug 120 is detachably attached to the supply side end of the water collection pipe 100, and closes the supply side end of the water collection pipe 100. This makes it possible to prevent raw water W1 that has not been filtered by the separation membrane 111 from flowing into the water collection pipe 100 from the supply side end. In addition, one end of the permeate side plug 130 is attached to the permeate side end of the water collection pipe 100, and the other end of the permeate side plug 130 is attached to one end of the first piping 50. This makes it possible to supply permeated water W2 that has been filtered by the membrane element 10 to the first piping 50 via the permeate side plug 130.

[0019] As shown in FIG. 1, the first foreign matter removal member 20 includes a mounting frame 20a having a predetermined aperture provided at one end, and a cylindrical or bag-shaped mesh portion 20b that unfolds from the mounting frame 20a toward the other end. The first foreign matter removal member 20 is attached to the supply side end of the membrane element 10 via the mounting frame 20a. The mounting frame 20a is attached to the peripheral surface of the supply side end of the membrane element 10 with, for example, a waterproof tape 22. The mesh portion 20b is configured with a mesh structure that prevents foreign matter such as dust from entering the supply side end face of the membrane element 10 in advance and allows the raw water W1 to pass through the supply side of the membrane element 10. This allows large dust and the like to be removed from the raw water W1 in advance, thereby preventing clogging and damage to the supply side of the membrane element 10. For example, a tulle material made of polyester, nylon, or the like, or a basket made of stainless steel, resin, or the like may be used for the mesh portion 20b.

[0020] In this embodiment, the first foreign matter removal member 20 is formed in a cylindrical or bag shape, but is not limited thereto. For example, the first foreign matter removal member 20 may be configured as a disk-shaped lid corresponding to the shape of the supply side end face of the membrane element 10, and attached to the supply side end of the membrane element 10. Furthermore, the attachment means for attaching the attachment frame 20a to the membrane element 10 is not limited to waterproof tape. The attachment means may be, for example, an adhesive, a screw, a hook-and-loop fastener, or the like.

[0021] The second foreign matter removal member 30 includes a mounting frame 30a having a predetermined diameter provided at one end, a cylindrical or bag-shaped mesh portion 30b extending from the mounting frame 30a toward the other end, and an opening 30c for inserting and removing the first pipe 50 provided at the other end. The second foreign matter removal member 30 is attached to the end of the permeation side of the membrane element 10 via the mounting frame 30a. The mounting frame 30a is attached to the peripheral surface of the end of the permeation side of the membrane element 10 with, for example, a waterproof tape 32. The mesh portion 30b is configured with a mesh structure that prevents foreign matter such as dust from entering the end face of the permeation side of the membrane element 10 by removing the dust and the like in advance, and allows the raw water W1 to pass through the supply side of the membrane element 10. This allows large dust and the like to be removed from the raw water W1 in advance, thereby preventing clogging and damage to the supply side of the membrane element 10. Also, for example, when the membrane element 10 is used in a standing or tilted state in water with the end of the permeation side of the membrane element 10 on the upper side, the air contained in the membrane element 10 passes through the mesh part 30b and rises in the water. The size of the mesh of the mesh part 30b of the second foreign matter removal member 30 may be the same as, smaller than, or larger than the size of the mesh of the mesh part 20b of the first foreign matter removal member 20. It is preferable that the mesh is finer than the structure. For example, the mesh part 30b may be made of a tulle material made of polyester, nylon, or the like, or a lattice-shaped cage made of stainless steel, resin, or the like. One end of the first pipe 50 is inserted into the opening 30c, and the mesh part 30b around the opening 30c is attached to the peripheral surface of the first pipe 50 with a waterproof tape 34.

[0022] Although the second foreign matter removal member 30 is configured by the mesh portion 30b, the present invention is not limited thereto. For example, the second foreign matter removal member 30 may be configured by a disk-shaped cover corresponding to the shape of the end portion on the permeation side of the membrane element 10 and attached to the end portion on the permeation side of the membrane element 10. The second foreign matter removal member 30 may also be configured by a degassing valve. In this case, the degassing valve can be attached to the end portion on the supply side of the water collection pipe 100, for example, to discharge the air that has flowed into the water collection pipe 100. It is also assumed that the mesh portion 20b on the first foreign matter removal member 20 side is clogged with foreign matter or the like, and the raw water W1 cannot be efficiently sucked in. In this case, the second foreign matter removal member 30 can function as a foreign matter removal member that removes foreign matter such as dust while supplying the raw water W1 to the end portion on the permeation side of the membrane element 10.

[0023] The pump 40 may be, for example, a centrifugal pump, a volumetric pump, a self-priming pump, a canned pump, a vacuum pump, a peristaltic pump, or a tube pump. A first pipe 50 for sucking the permeate W2 from the membrane element 10 is connected to the pump 40, and a second pipe 52 for supplying the permeate W2 sucked by the first pipe 50 to a user or the like is connected to the pump 40. The pump 40 reduces the pressure inside the membrane element 10 by driving to generate a trans-membrane pressure (TMP) required for filtration. In this embodiment, the pressure on the supply side is set to atmospheric pressure + water depth, and the pressure on the permeate side is set to negative pressure by driving the pump 40, thereby generating a pressure difference that serves as a filtration driving force.

[0024] [Filtration process flow using filtration membrane device 1] Next, a flow of filtering raw water W1 using the filtration membrane device 1 according to the present embodiment will be described. FIG. 3 is a diagram showing the state of the filtration membrane device 1 when the membrane element 10 according to the present embodiment is placed in a pond 70. For example, in the case of an emergency such as a disaster, when obtaining filtered permeate W2, the user installs the pump 40 on the ground 60 around the pond 70 and places the membrane element 10 connected to the pump 40 in the pond 70. At this time, the user holds the filtration membrane device 1 in water in a substantially upright state. After placing the membrane element 10 in the pond 70, the user drives the pump 40 to start the filtration process. By driving the pump 40, the pressure in the first pipe 50 and the membrane element 10 is reduced, and a transmembrane pressure difference required for the filtration process is generated in the space formed between a pair of separation membranes 111, 111, for example.

[0025] Raw water W1 from the pond 70 passes through the first foreign matter removal member 20 and flows into the membrane element 10 from the end of the membrane element 10 on the supply side. At this time, foreign matter such as dust is removed by the mesh portion 20b of the first foreign matter removal member 20 and the mesh portion 30b of the second foreign matter removal member 30. Air contained in the membrane element 10 passes through the mesh portion 30b of the second foreign matter removal member 30 and rises toward the water surface. This allows air contained in the membrane element 10 to be removed. The raw water W1 flows along the longitudinal direction of the water collection pipe 100 through the raw water spacer 113 in the membrane element 10 and passes through the surface of the separation membrane 111. At this time, the raw water W1 passes through the separation membrane 111 in the thickness direction, and impurities contained in the raw water W1 are removed.

[0026] The permeated water W2 flows through the permeated water spacer 112 between the separation membranes 111, 111, and is taken into the water collection pipe 100 from its suction port. The permeated water W2 taken into the water collection pipe 100 is supplied to the user via the permeate side plug 130, the first pipe 50, the pump 40, and the second pipe 52. In this way, the user can obtain the permeated water W2 from which impurities have been removed from the raw water W1. Considering that a certain amount of impurities accumulates in the membrane element 10, the membrane element 10 may be replaced after a predetermined period of time, such as one week. In other words, the membrane element 10 can be used disposably.

[0027] In this embodiment, the membrane element 10 is configured to have a size and weight that can be held by a user, and is configured in a state in which the separation membrane 111 is exposed without being housed in a container or the like. This allows the membrane element 10 to be configured with a lightweight and simple structure, so that it can be quickly and easily transported and installed at the intended location for filtration treatment. In addition, the storage space for the membrane element 10 can be saved. Furthermore, according to this embodiment, the first foreign matter removal member 20 is attached to the supply side end of the membrane element 10, so that it is possible to prevent foreign matter such as dust from contacting or colliding with the supply side end of the membrane element 10 during filtration treatment, thereby preventing the membrane element 10 from being damaged. Furthermore, it is possible to prevent the supply side end face of the membrane element 10 from being clogged due to foreign matter such as dust adhering to the supply side end of the membrane element 10 due to the suction force of the pump 40 during filtration treatment. Furthermore, even if one of the first foreign matter removal member 20 and the second foreign matter removal member 30 becomes clogged with foreign matter, the raw water W1 can be sucked in from the other foreign matter removal member, so that the filtration process of the raw water W1 can be continued smoothly.

[0028] Although the preferred embodiment of the present disclosure has been described in detail above with reference to the attached drawings, the technical scope of the present disclosure is not limited to such examples. In addition, various modifications and improvements are naturally included in the technical scope of the present disclosure within the scope of the technical ideas described in the claims of the utility model registration by a person skilled in the art. In the above-mentioned embodiment, the raw water W1 is sucked using the pump 40, but this is not limited to this. For example, in a place where electricity cannot be used, the filtration process may be realized by utilizing the water level difference. In the above-mentioned embodiment, the filtration membrane device 1 is configured to have both the first foreign matter removal member 20 and the second foreign matter removal member 30, but it may be configured to have only the first foreign matter removal member 20 depending on the usage situation, etc. [Explanation of symbols]

[0029] 1. Filtration membrane device 10 Membrane element 20 First foreign object removal member 30 Second foreign object removal member 40 Pump 100 Water collection pipe 110 Laminate 111 Separation membrane 112 Permeate spacer 113 Raw Water Spacer 120 Supply side plug 130 Transmitting side plug

Claims

1. a membrane element including a laminate in which at least a water collection pipe, a separation membrane, a feed-side flow path member, and a permeate-side flow path forming member are laminated, the laminate being wound in a spiral shape; A first foreign matter removal member attached to an end of the supply side of the membrane element for removing foreign matter contained in the raw water; A filtration membrane device comprising:

2. A second foreign matter removal member is attached to the end of the permeation side of the membrane element and is used to remove foreign matter contained in the raw water. The filtration membrane device according to claim 1.

3. The first foreign matter removal member and the second foreign matter removal member have a mesh structure. The filtration membrane device according to claim 2.

4. A permeate plug is attached to the permeate end of the water collection pipe, The permeate side plug is connected to a pump via a first pipe. The filtration membrane device according to any one of claims 1 to 3.

5. A supply plug is attached to the supply end of the water collection pipe, The supply plug is closed. The filtration membrane device according to claim 4.

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