TW201345603A - Purification system, filter and cartridge - Google Patents

Abstract

A purification system and a filter are provided, wherein the user is able to wash the outer surface of a hollow fiber membrane by using water without effort and without the need for opening and closing the casing thereof for washing by hand. The purification system includes: a specialized faucet 5, a general faucet 3, and a purifier 1 disposed on the upstream side of the specialized faucet 5 and having a hollow fiber membrane module 29 for purifying water. The purification system is characterized in that: when the specialized faucet 5 is opened, water purified by the hollow fiber membrane module 29 outflows from the specialized faucet 5; and when the general faucet 3 is opened, water having washed the hollow fiber membrane module 29 outflows from the general faucet 3.

Description

Purification system and filter

The present invention relates to a purification system and a filter, and more particularly to a purification system equipped with a filter having a hollow fiber membrane module and a filter having a hollow fiber membrane module.

Since the past, systems for purifying water by activated carbon and hollow fiber membranes have been known. In such a system, when there is a particularly high amount of turbidity in water, a prefilter is further provided on the upstream side of the activated carbon cartridge and the hollow fiber membrane cartridge. In general, as the prefilter, for example, a filter cartridge having a hollow fiber membrane module as described in Patent Document 1 is used.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 4212024

However, when the hollow fiber membrane module described in Patent Document 1 is cleaned, it is necessary to separately supply the cleaning liquid, and the equipment for supplying the cleaning liquid is complicated. Moreover, the cleaning liquid itself must be discharged before flushing, and further, it must be confirmed that the cleaning liquid has been washed away. Therefore, in the case where a filter having a hollow fiber membrane module is used, it is expected that the turbidity in the hollow fiber membrane accumulated in the filter can be easily washed.

Further, in particular, in the case of purifying water having a small particle size and a large amount of turbidity, it is necessary to reduce the pore diameter of the hollow fiber membrane of the hollow fiber membrane module, and to reduce the pore diameter of the hollow fiber membrane of the hollow fiber membrane module. Then the turbidity will become more Easy to accumulate. Therefore, when the water having a large particle size and a small amount of turbidity is purified, the frequency of cleaning the hollow fiber membrane of the filter becomes higher.

Further, in the case of cleaning the hollow fiber membrane, there is also a method in which the hollow fiber membrane is taken out from the casing and the hollow fiber membrane is cleaned by hand, and the hollow fiber membrane is returned to the outer casing again. The enclosure is sealed. However, if the frequency of cleaning the hollow fiber membrane is increased, the frequency of opening and closing the casing is also increased, and the possibility that the casing cannot be completely sealed and water leakage occurs increases. Moreover, it is desirable that the user can clean the outer surface of the hollow fiber membrane by using water arbitrarily.

In view of the above, the present invention has been made to solve the above problems, and an object thereof is to provide a cleaning system and a filter which are no longer required in the case where a filter cartridge having a hollow fiber membrane module is used for a filter. The shell is opened and closed to wash the hollow fiber membrane by hand.

In order to solve the above problems, the present invention provides a purification system comprising: a first water plug; a second water plug different from the first water plug; and a water purifier disposed on an upstream side of the first water plug And a hollow fiber membrane module for purifying water, wherein when the first water plug is opened, the purified water purified by the hollow fiber membrane module flows out from the first water plug, and when the second water plug is opened The washing water that has been cleaned of the hollow fiber membrane module is discharged from the second water plug.

According to the invention constructed in this manner, when the first water plug is opened, the purified water purified by the hollow fiber membrane module can be discharged from the first water plug, and when the second water plug is opened, the hollow fiber can be washed. Hollow fiber membrane of membrane module The washing water flows out from the second water plug. Therefore, according to the present invention, the user can freely clean the hollow fiber membrane of the hollow fiber membrane module by merely opening the second water plug. Thereby, the user no longer needs to take out the hollow fiber membrane, for example, periodically for cleaning.

In this case, it is preferred that the water purified by the hollow fiber membrane module and the water for cleaning the hollow fiber membrane module flow from one water inlet into the purification system.

Further, in this case, it is preferable that the purified water purified by the water purifier flows to the first water plug when the first water plug is opened and the second water plug is closed.

Further, in this case, it is preferable that the cleaning water of the hollow fiber membrane module that has been cleaned of the water purifier flows toward the second water hydrant when the second water plug is opened and the first water faucet is closed.

Further, in this case, it is preferable that the water purifier includes a first filter, and the first filter is disposed between the water inlet and the first water plug and the second water plug.

Further, in this case, it is preferable that the water purifier includes a second filter, and the second filter is disposed between the first filter and the first water plug.

Further, in this case, it is preferable that the water purifier includes a third filter, and the third filter is disposed between the second filter and the first water plug.

Further, in this case, it is preferable that the first filter includes a hollow fiber membrane module.

Further, in this case, it is preferred that the second filter has an adsorbent for adsorbing turbidity in the water.

Further, in this case, it is preferred that the adsorbent be activated carbon or an ion exchanger.

Further, in this case, it is preferable that the third filter includes a hollow fiber membrane module for further purifying the water purified by the second filter.

Moreover, in order to solve the above problems, the present invention is a filter for purifying water, comprising: a cylindrical container; a water inlet for allowing water to flow into the interior of the cylindrical container; a hollow fiber membrane module disposed in the cylinder The inside of the container has a hollow fiber membrane bundled in a column shape, and the water flowing into the cylindrical container from the water inlet is purified; the water outlet is connected to the first water plug, and is used to pass the hollow fiber. The clean water discharged from the membrane module and the washing water outlet are configured to be connectable to the second water plug different from the first water plug, and to discharge the washing water of the cleaned hollow fiber membrane module.

According to the present invention configured as described above, the first water plug connected to the filter can be used to purify the water in the cylindrical container by the hollow fiber membrane module, and the purified water can be discharged from the first water plug. The hollow fiber membrane of the hollow fiber membrane module can be washed by using the water in the cylindrical container by opening the second water plug, and the washing water can flow out from the second water hydrant. Therefore, according to the present invention, the user can freely clean the hollow fiber membrane of the hollow fiber membrane module by merely opening the second water plug. Thereby, the user no longer needs to take out the hollow fiber membrane, for example, periodically for cleaning.

Further, in the invention, it is preferable that the washing water outlet is formed at one end side of the opening of the cylindrical container, and the hollow fiber membrane module is disposed near the other end side of the cylindrical container, and includes a spiral flow forming structure, and the spiral flow is formed. Constructing a flow of water flowing from the water inlet into the cylindrical container into a spiral flow, that is, spiraling around the hollow fiber membrane and flowing toward the washing water outlet Spiral flow.

According to the invention constructed in this manner, the flow of water flowing into the hollow fiber membrane module can be converted into a spiral flow spirally flowing around the hollow fiber membrane by the spiral flow forming structure. Further, by making the flow of such water a spiral flow, the cleaning effect of the hollow fiber membrane can be further improved.

In this case, it is preferable that the spiral flow forming structure is a spiral flow forming member, the spiral flow forming member has a passage, and is formed on the other end side of the hollow fiber membrane, and the passage is oriented with respect to the axial direction of the cylindrical container. It is constructed to extend obliquely and to pass water through its interior.

Further, in this case, it is preferable that the hollow fiber membrane module includes a cylindrical outer casing surrounding the hollow fiber membrane, and the spiral flow is formed as a through hole extending through the outer casing, the through hole including: formed outside the outer casing The inlet of the surface, and an outlet formed at a position deviated from the inlet toward the circumferential direction of the outer casing.

Further, in the present invention, it is preferable that the hollow fiber membrane module has a center tube which is disposed in a hollow fiber membrane bundled in a columnar shape and extends in the axial direction of the columnar hollow fiber membrane. One end of the center pipe is opened so that water flows into the inside, and a plurality of discharge ports are provided so that water flowing into the inside can be discharged toward the hollow fiber membrane.

According to the invention constructed in this manner, water can flow from the opening of the center tube into the center tube, and the water in the center tube can be discharged from the inner side of the columnar body of the hollow fiber membrane toward the hollow fiber membrane. Thereby, the hollow fiber membrane can be cleaned from the inner side of the columnar body, thereby further improving the hollow fiber membrane. Wash the effect.

Further, in order to solve the above problems, the present invention provides a filter cartridge for a filter for purifying water, comprising: a casing disposed in a cylindrical vessel having a water inlet; and a hollow fiber membrane module disposed inside the casing, Bundled into a columnar hollow fiber membrane, and purified from the water inlet into the cylindrical container; the purified water outlet is connected to the first water plug and used to purify the hollow fiber membrane module The purified water outlet and the washing water outlet are configured to be connectable to the second faucet different from the first faucet, and are used to discharge the water of the cleaned hollow fiber membrane module.

According to the invention constructed in this manner, the hollow fiber membrane module can be used to purify the water in the cylindrical container, and the purified water can be discharged from the purified water outlet, and the hollow fiber membrane module can be cleaned by using the water in the cylindrical container. The hollow fiber membrane allows the washing water to flow out of the washing water outlet. Therefore, according to the present invention, the user can freely clean the hollow fiber membrane of the hollow fiber membrane module by allowing water to flow into the cylindrical container. Thereby, the user no longer needs to take out the hollow fiber membrane, for example, periodically for cleaning.

Moreover, the present invention is a filter for purifying water, comprising: a cylindrical container; a water inlet for allowing water to flow into the interior of the cylindrical container; and a hollow fiber membrane module disposed inside the cylindrical container, a hollow fiber membrane bundled in a columnar shape and an outer casing surrounding the hollow fiber membrane, and water that flows from the water inlet into the cylindrical container and further flows into the outer casing from the cylindrical container; and a water purification outlet for The purified purified water is discharged, and a plurality of particles are placed in the outer casing, and the plurality of particles sway the hollow fiber membrane with the flow of water flowing into the outer casing.

According to the invention constructed in this manner, water can be made to flow into the cylindrical container from the water inlet, and the hollow fiber membrane in the outer casing of the hollow fiber membrane module can be used to purify the water. Moreover, according to the present invention, a plurality of particles can be floated in the outer casing by causing water to flow into the outer casing, thereby causing the floating plurality of particles to collide with the hollow fiber membrane. Thereby, the turbidity adhering to the hollow fiber membrane can be dropped.

As described above, according to the present invention, the user does not need to open and close the outer casing for hand washing, and the outer surface of the hollow fiber membrane can be cleaned by using water arbitrarily.

Hereinafter, a prefilter according to an embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a schematic view of a water purifier system having a prefilter according to an embodiment of the present invention. The water purifier system comprises: a water purifier 1 for purifying water, which is connected to the ordinary water plug 3 of the water purifier 1 and the special water plug 5, respectively. The water purifier 1 is configured such that the water flowing out from the valve 11 located at the water inlet flows to the ordinary water hydrant 3 and the dedicated state according to the state of the lever 7 of the ordinary faucet 3 and the tie rod 9 of the dedicated faucet 5 Water plug 5.

The dedicated water plug 5 is connected to the valve 11 located at the water inlet via the water purifier 1. Further, the dedicated faucet 5 is opened and closed by operating the tie rod 9 of the dedicated faucet 5, so that the purified water purified by the water purifier 1 flows out when the dedicated faucet 5 is opened.

In addition, the details will be described later, and the ordinary water hydrant 3 is connected to the valve 11 at the water inlet via the water purifier 1 from the valve at the water inlet. 11 The water flowing to the ordinary water hydrant 3 is not purified by the water purifier 1 and flows.

Fig. 2 is a perspective view showing the water purifier. The water purifier 1 includes a prefilter 19, a sorbent cartridge 21, and a hollow fiber membrane cartridge 23, from the upstream side where the valve 11 is located toward the downstream side where the dedicated faucet 5 is located, according to the prefilter 19 and the sorbent cartridge 21 And the order of the hollow fiber membrane cartridges 23 are connected. Further, the water flowing out of the valve 11 is sequentially purified by the prefilter 19, the adsorbent cartridge 21, and the hollow fiber membrane cartridge 23, and then flows toward the dedicated faucet 5.

The prefilter 19 includes a header 25 connected to the valve 11, and a cylindrical container 27 detachably attachable to the header 25. Further, the header 25 is connected to the activated carbon filter cartridge 21 located on the downstream side of the prefilter 19 and adjacent to the prefilter 19, and the ordinary water hydrant 3.

3 is a plan view showing a state in which the header of the prefilter is removed, and FIGS. 4 to 6 are cross-sectional views taken along line IV-IV, V-V, and VI-VI of FIG. 3, respectively.

As shown in FIGS. 3 to 6, a hollow fiber membrane module 29 is housed inside the cylindrical container 27. The cylindrical container 27 includes a cylindrical container body 31 whose one end is open and whose other end is closed, and a container cap 33 that is attached to the open end of the container body 31. The container top cover 33 can be detachably mounted relative to the container body 31. Further, by removing the container top cover 33 from the container body 31, for example, when the hollow fiber membrane module 29 is replaced, the hollow fiber membrane module 29 is taken out from the cylindrical container 27. Further, one end of the container top cover 33 is configured to be protruded so as to be fitted in the header 25, and the cylindrical container 27 can be liquid-tightly fixed to the header 25 via the O-ring 35.

The hollow fiber membrane module 29 includes a top cover 37 that can be mounted in the container top cover 33 of the cylindrical container 27. In the center of the top cover 37, a water inlet pipe 39 extending in the vertical direction is provided. When the tubular container 27 is attached to the header 25, the water inlet pipe 39 is connected to a water discharge port (not shown) in the header 25. Further, the water flowing out of the valve 11 via the header 25 flows into the inside of the cylindrical container 27 through the water inlet pipe 39 as indicated by an arrow A. Further, the top cover 37 has a receiving portion 41 at a lower portion of the water inlet pipe 39, and the receiving portion 41 receives water flowing out from the water inlet pipe 39, and causes water to flow in the circumferential direction of the cylindrical container 27 as indicated by an arrow B. . Moreover, the top cover 37 has a clean water outlet pipe 43 for causing the purified water to flow toward the header 25 as indicated by the arrow C. Further, a washing water outlet pipe 45 for rinsing the water flowing out of the hollow fiber membrane module 29 to the arrow D by a method described later is provided on the side of the water inlet pipe 39 of the top cover 37. The direction shown is flowing.

The hollow fiber membrane module 29 further includes a plurality of hollow fiber membranes 47 bundled in a columnar shape, an inner casing 49 disposed to surround the outer periphery of the bundled hollow fiber membranes 47, and a lower outer casing 49. The outer casing 51 at the outer peripheral side.

Each of the hollow fiber membranes 47 is bent in a U shape and its both ends are held near the one end of the inner side casing 49 by a potting material 53. Further, the plurality of hollow fiber membranes 47 are bent into a U shape and their ends are fixed to the potting material 51, whereby the plurality of hollow fiber membranes 47 constitute a columnar body. Further, the end portion of the hollow fiber membrane 47 is opened, and the water purified by the hollow fiber membrane 47 is directed toward the space 55 located on the one end side of the potting material 53. Composition. This space 55 is connected to the purified water outlet pipe 43, and the purified water flows through the space 55 to the purified water outlet pipe 43.

As the hollow fiber membrane 47, for example, it is preferable to use various materials including cellulose (polycarbonate), polyolefin (polyethylene), polypropylene, and polyvinyl alcohol (polyvinyl alcohol). ), ethylene-vinyl alcohol copolymer, polyether, polymethyl methacrylate (PMMA), polysulfone, polyacrylonitrile, polyfluoroethylene (polyfluoroethylene) Teflon (registered trademark) is a polycarbonate, a polyester, a polyamide, an aromatic polyamine or the like. Among these materials, in particular, the strength-strength or bending resistance, cleaning property, workability, or chemical resistance of the film are considered, and it is preferred to use polyethylene or polypropylene. An olefin-based hollow fiber membrane. Further, in consideration of the flow rate and the fouling filtration performance, it is preferred to use a polyfluorene-based hollow fiber membrane.

Fig. 7 is a perspective view showing the inner casing.

As shown in FIGS. 4 to 7, the inner casing 49 includes a cylindrical body such as a hollow fiber membrane 47. A case top cover 57 is attached to one end side of the inner case 49, and the case top cover 57 is configured to be liquid-tightly coupled to the top cover 37. The other end side of the inner casing 49 is opened so as to receive water located closer to the closed end side of the cylindrical container 27 than the hollow fiber membrane module 29. Further, a plurality of openings 59 are formed on the side surface of the inner casing 45.

The outer casing 51 includes a cylindrical body like the inner casing 49. in A gap is formed between the outer casing 51 and the inner casing 49, and one end of the outer casing 51 is attached to the top cover 37 at an outer side in the circumferential direction of the inner casing 49. Moreover, the other end of the outer casing 51 is open at the same position as the other end of the inner casing 49. Further, the gap between the outer casing 51 and the inner casing 49 is configured to communicate with the washing water outlet pipe 45 of the top cover 37 so that the washing water passing between the outer casing 51 and the inner casing 49 flows toward the washing water outlet pipe. 45.

Further, the hollow fiber membrane module 29 is held in the cylindrical container 27 so as to form a gap 61 between the hollow fiber membrane module 29 and the inner wall of the container body 31 of the cylindrical container 27. Further, the water that has flowed out from the receiving portion 41 of the top cover 37 flows toward the closed end side of the cylindrical container 27 through the gap 61 as indicated by an arrow E.

Figure 8 is a cross-sectional view of a sorbent cartridge. The adsorbent cartridge 21 includes a cylindrical container 63 and an adsorbent module 65 disposed in the cylindrical container 63. The cylindrical container 63 includes a purified water inlet 67 for receiving the purified water flowing out of the prefilter 19, and a purified water outlet 69 for discharging the purified water that has passed through the adsorbent module 65.

The adsorbent module 65 is configured to be fixed in the cylindrical container 63 to further purify the purified water flowing into the cylindrical container 63. The sorbent module 65 includes a housing 71 that houses an adsorbent. Further, the purified water in the cylindrical container 63 flows into the outer casing 71 through the plurality of openings 73 formed in the outer casing 71. Further, the purified water that has flowed into the outer casing 71 is further purified by the adsorbent and then flows toward the clean water outlet 69.

As the adsorbent contained in the adsorbent module 65, activated carbon or an ion exchanger can be used.

Examples of the activated carbon include powdered activated carbon, granular activated carbon, fibrous activated carbon, bulk activated carbon, extrusion-formed activated carbon, formed activated carbon, synthetic granular activated carbon, and synthetic fibrous activated carbon. When activated carbon is used as the adsorbent, residual chlorine, moldy odor, or an organic compound such as trihalomethane in the water can be removed.

Further, examples of the ion exchanger include an ion exchange fiber, an aluminosilicate inorganic ion exchanger, and the like. Examples of the ion-exchange fiber include a strong acid type having a sulfonic acid group as an exchange group, a weak acid type having a carboxylic acid group as an exchange group, a strong base type having a quaternary ammonium group as an exchange group, and a weak group having an amine group as an exchange group. Alkali type, etc. When an ion exchange fiber is used, reactivity is high and handling is easy. Examples of the aluminosilicate-based inorganic ion exchanger include molecular sieve 3A, molecular sieve 4A, molecular sieve 5A, molecular sieve 13, X, octahedral zeolite, mordenite-type zeolite, etc., which are synthetic zeolites. . The heavy metal ions of the synthetic zeolites have high adsorption ability, and in particular, the solubility of the soluble lead ions of the molecular sieve 5A is excellent.

Then, the purified water that has flowed into the cylindrical container 63 and has passed through the adsorbent module 65 passes through the purified water outlet 69 and flows to the hollow fiber membrane cartridge 23.

The hollow fiber membrane cartridge 23 has the same configuration as the adsorbent cartridge 21 except that it has a hollow fiber membrane module instead of the adsorbent. Therefore, a detailed description of the configuration of the hollow fiber membrane cartridge 23 is omitted.

Next, the action of the above water purifier system will be described in detail.

First, the case where the purified water flows out from the dedicated faucet 5 will be described.

In the case of the water flowing out from the special faucet 5, the ordinary water hydrant 3 is closed. When closed, the water flowing from the valve 11 to the water purifier system flows through the water purifier 1 to the dedicated water hydrant 5.

Specifically, in a state where the normal faucet 3 is closed, the water flowing from the valve 11 to the prefilter 19 of the water purifier 1 first flows through the water inlet pipe 39 toward the receiving portion 41 as indicated by an arrow A. Then, after the water hits the receiving portion 41, it flows in the circumferential direction of the cylindrical container 27 as indicated by an arrow B. Then, as indicated by an arrow E, the water flows in the direction of the closed end of the cylindrical container 27 through the gap 61 between the inner wall of the container body 31 of the cylindrical container 27 and the outer casing 51 of the hollow fiber membrane module 29. Then, water reaching the vicinity of the closed end of the cylindrical container 27 flows into the inside of the inner casing 49 from the opening of the inner casing 49 of the hollow fiber membrane module 29. In the case where the dedicated water faucet 5 is used, since the ordinary water faucet 3 is closed, the water pressure inside the washing water outlet pipe 45 connected to the ordinary water hydrant 3 is higher than the inside of the clean water outlet pipe 43 connected to the opened dedicated faucet 5. The water pressure is high. Therefore, the raw water flowing into the hollow fiber membrane module 29 flows toward the gap between the inner casing 49 and the outer casing 51 in the direction of the washing water outlet pipe 45, that is, through the opening 59 of the inner casing 49. The direction flows, but flows in the direction of the clean water outlet pipe 43, that is, in the direction of the hollow fiber membrane 47 of the hollow fiber membrane module 29.

Then, the turbidity contained in the water that has passed through the hollow fiber membrane 47 is captured by the hollow fiber membrane 47. Thereby, after the water is purified, it flows into the purified water outlet pipe 43 through the space 55 as indicated by an arrow C. Then, the purified water is sent from the purified water outlet pipe 43 to the header 25, passes through the header 25, and is sent to the activated carbon filter cartridge 21 located on the downstream side of the prefilter 19. Further, the purified water flowing out of the prefilter 19 is further purified by the activated carbon filter cartridge 21 and the hollow fiber membrane cartridge 23 After the liberation, it flows out from the special water plug 5.

Next, a description will be given of a case where water is discharged from the ordinary water hydrant 3.

When the water flows out from the ordinary water hydrant 3, since the dedicated water hydrant 5 is closed, the water pressure in the clean water outlet pipe 43 of the prefilter 19 is higher than the water pressure in the washing water outlet pipe 45. Therefore, the water that has entered the inside of the cylindrical container 27 of the prefilter 19 and further flows into the hollow fiber membrane module 29 from the valve 11 does not flow in the direction of the purified water outlet pipe 43, but is directed toward the washing water outlet pipe 45. flow. When the water flowing into the hollow fiber membrane module 29 flows from the opening of the inner casing 49 toward the opening 59 of the inner casing 51, the water is along the outer surface of the hollow fiber membrane 47 bundled into a columnar shape. The flow so that the turbidity adhering to the outer surface of the hollow fiber membrane 47 can be washed away. Further, at this time, water does not flow through the hollow fiber membranes 47 but flows between the plurality of hollow fiber membranes 47, so that the turbidity adhering to the inside of the columnar body of the hollow fiber membranes 47 can be washed away. Further, the water containing turbidity flows between the inner casing 49 and the outer casing 51 in the direction of the top cover 31, and passes through the washing water outlet pipe 43 to reach the header 25. Then, the washing water flows from the header 25 toward the ordinary faucet 3.

As described above, in the water purifier system according to the embodiment of the present invention, the outer surface of the hollow fiber membrane 43 can be washed with water by opening the ordinary water hydrant 3. Thereby, the user can freely wash away the turbidity from the hollow fiber membrane 47 of the prefilter 19. Moreover, according to the cleaning system of the embodiment of the present invention, the hollow fiber membrane 47 of the prefilter 19 can be cleaned each time the ordinary faucet 3 is opened, so that it is not necessary to take out the hollow fiber membrane from the cylindrical container 27 of the prefilter 19. The module 29 is used to hand wash the hollow fiber membrane 47. and, Since it is not necessary to open and close the cylindrical container 27, the so-called I-type water purifier in which the water pressure in the cylindrical container 27 is always high is particularly effective for preventing water leakage.

Next, a first modification of the above embodiment will be described. 9 is a cross-sectional view of a prefilter according to a modification, and FIG. 10 is a perspective view of a spiral flow forming member. 9 is a cross-sectional view taken along the line IV-IV shown in FIG. 3.

As shown in FIG. 9 and FIG. 10, the prefilter of the modification includes a spiral flow forming member 101 as a spiral flow forming structure for converting the flow of water into a spiral shape on the other end side of the inner casing 49. The spiral flow forming member 101 includes a plate-like member 103 and a plurality of flow paths 105 extending through the plate-like member 103. The plate member 103 is sized to be fitted into the opening of the inner casing 45. Further, the flow path 105 has a shape in which the flow of water flowing out from the closed end side of the cylindrical container 27 can be converted into a spiral shape. The flow path 105 extends obliquely with respect to the axial direction of the cylindrical container 27, and specifically extends in the tangential direction of the disk-shaped plate-shaped member 103 and in the axial direction of the cylindrical container 27.

Fig. 11 is a perspective view showing an inner casing of a prefilter according to a modification. When the water flowing in the axial direction of the cylindrical container 27 passes through the spiral flow forming member 101, the flow of water becomes the circumferential direction of the cylindrical container 27 and the axial direction by the flow path 105. As a result, as shown in Fig. 11, the water flows while rotating around the inner casing 49, or flows while flowing in from the opening 59 of the inner casing 49, or is surrounded by the hollow fiber membrane 47 inside the inner casing 49. Rotate while flowing. Providing such a spiral flow forming member 101 converts the flow of water into a spiral flow, thereby further improving The cleaning effect of the hollow fiber membrane 47.

When the plate-like member is placed horizontally, the flow path 105 may be oriented in an oblique direction with respect to the axial direction of the cylindrical container 27. As an example of the shape, the hole may be obliquely opened in a substantially parallel manner, or may be a trapezoidal hole. . Further, the flow path 105 may be curved in the middle or branched into a plurality of branches.

As an example of the arrangement of the flow path 105, it is preferable that the water is dispersed substantially uniformly inside the cylindrical container 27, and it is preferable to disperse and distribute the entire plate-like member 103 so as to be uniform. Further, the spiral flow forming member 101 may be disposed to be perpendicular to the central axis of the cylindrical container 27, or may be disposed to be inclined with respect to the central axis of the cylindrical container 27.

Fig. 12 is a side view showing still another example of the spiral flow forming structure. As shown in FIG. 12, the spiral flow forming member of still another example includes a plurality of holes 107 formed in the vicinity of the other end side of the side surface of the outer casing 51. In this example, the other end of the outer casing 51 is closed, and the water in the cylindrical container 27 is configured so as not to flow into the outer casing 51 except for the hole 107.

A plurality of holes 107 are formed on the side of the outer casing 51, and extend from the inlet 109 formed on the outer surface to the outlet 111 formed on the inner surface. Further, as shown in FIG. 12, the outlet 111 of the hole 107 is preferably formed at a position deviated to the circumferential direction of the outer casing 51 with respect to the inlet 109.

Further, when water flows from the cylindrical container 27 into the outer casing 51, the flow of water in the outer casing 51 can be made spiral by passing through the plurality of holes 107. Further, even if the hole 107 is provided in the outer casing 51, the flow of water can be converted into a spiral flow to further improve the cleaning effect of the hollow fiber membrane 47.

Next, a second modification of the above embodiment will be described in detail. Fig. 13 is a cross-sectional view showing a prefilter according to a second modification, and is a cross-sectional view taken along line IV-IV of Fig. 3;

As shown in FIG. 13, the hollow fiber membrane module of the prefilter of the second modification has a center tube 113 disposed in the hollow fiber membrane 47. The center tube 113 has substantially the same length as the inner casing 49 and extends from the opening of the inner casing 49 to the potting material 53. One end side of the center tube 113 is fixed to the potting material 53 at the center of the inner side casing 49. Further, the other end side of the center tube 113 is opened toward the other end side of the cylindrical container 27. In order to increase the amount of water received from the end of the opening, the other end of the center tube 113 is increased in diameter compared to other portions. Further, a plurality of openings 115 are provided on the wall surface of the center tube 113. Moreover, the other end side of the outer casing 49 is closed by a top cover 117 having an opening at the center. Further, the other end of the center pipe 113 is configured to be fitted into the opening of the top cover 117 such that all the water in the cylindrical container 27 flows into the center pipe 113.

Examples of the material of the center tube 113 include a resin, a metal, and the like, but are not limited thereto. If a resin made of a resin such as vinyl chloride resin, polystyrene, acrylic resin, polycarbonate, acrylonitrile butadiene styrene (ABS) resin, polyethylene or polypropylene is used, it is easy to process. And thus better. The length of the center tube can be accommodated in the filter, and if it is 80 mm to 200 mm, the hollow fiber membrane can be effectively cleaned, which is preferable. The diameter of the opening 115 of the wall surface of the center tube 113 is not particularly limited, and is preferably 0.1 mm to 10 mm. In terms of the opening 115, it is preferable to have a plurality of, more preferably, the length of the center tube 113 To the vertical plane, openings are provided every 2 or every 4 places at the point symmetry. The interval of the holes is not particularly limited, but is preferably provided at intervals of 5 mm to 50 mm from the lower end of the center tube 113.

By providing such a center pipe 113, the water in the cylindrical container 27 flows into the outer casing 51 through the center pipe 113. Then, the water that has flowed into the center pipe 113 from the cylindrical container 27 flows into the outer casing 51 through the opening 115 of the side wall of the center pipe 113. Then, water is discharged from the center tube 113 through the opening 115, whereby the water is substantially radially discharged. In this manner, water is radially discharged from the inside of the hollow fiber membrane 47 and flows into the outer casing 51, whereby the hollow fiber membrane can be cleaned from the inside of the columnar body of the hollow fiber membrane 47. Thereby, the cleaning effect of the hollow fiber membrane 47 can be further improved.

Next, a modification of the water purifier system according to the embodiment of the present invention will be described. 14 and 15 are schematic views showing a modification of the water purifier system.

As shown in FIGS. 14 and 15, the water faucet 121 can be provided separately from the ordinary water hydrant 3 and the special water hydrant 5 for discharging the washing water of the prefilter 19 of the cleaned water purifier 1. In this case, the ordinary water hydrant 3 is directly connected to the valve 11, and the water flowing through the ordinary water hydrant 3 does not pass through the water purifier 1. Further, the washing water outlet pipe 45 of the prefilter 19 is connected to the water plug 121, which is attached to the ordinary water hydrant 3 or the dedicated water hydrant 5. Thereby, when the water plug 121 is opened, the water that has flowed into the prefilter 19 washes the hollow fiber membrane 47 and then flows as the washing water toward the water plug 121.

Thus, in addition to the ordinary faucet and the special hydrant, a hydrant for discharging the washing water of the cleaned hollow fiber membrane is provided, whereby the hydrant can be selected according to the use of the water.

Next, a second embodiment of the present invention will be described in detail. Fig. 16 is a cross-sectional view showing the filter of the second embodiment.

As shown in FIG. 16, the filter 201 includes a cylindrical container 203 that is detachable from a header (not shown), and a hollow fiber membrane module 205 that is housed in the cylindrical container 203.

The hollow fiber membrane module 205 includes a plurality of hollow fiber membranes 207 bundled in a columnar shape, and a casing 209 disposed to surround the outer periphery of the bundled hollow fiber membranes 207.

Each of the hollow fiber membranes 207 is bent in a U shape, and both ends thereof are held near the one end of the outer casing 209 by the potting material 211. Further, the plurality of hollow fiber membranes 207 are bent into a U shape, and the ends thereof are fixed to the potting material 211, whereby the plurality of hollow fiber membranes 207 constitute a columnar body. Further, the end portion of the hollow fiber membrane 207 is opened, and the water purified by the hollow fiber membrane 207 is configured to flow toward the space 213 located on the one end side of the potting material 211. This space 213 is connected to the purified water outlet pipe 215, and the purified water passes through the space 213 and flows to the clean water outlet pipe 215.

As the hollow fiber membrane 207, for example, it is preferable to use various materials including cellulose, polyolefin (polyethylene, polypropylene), polyvinyl alcohol, ethylene-vinyl alcohol copolymer, polyether, polymethyl. Methyl methacrylate (PMMA), polyfluorene, polyacrylonitrile, polyvinyl fluoride (Teflon (registered trademark)), polycarbonate, polyester, polyamide, aromatic Polyamides and the like. Among these materials, in particular, in consideration of strength tensile strength or bending resistance, cleaning property, workability, and chemical resistance of the film, it is preferred to use a polyolefin-based hollow fiber membrane such as polyethylene or polypropylene. . Further, in consideration of the flow rate and the fouling filtration performance, it is preferred to use a polyfluorene-based hollow fiber membrane.

A top cover 217 is attached to the other end side of the outer casing 209 to substantially close the other end of the outer casing 209.

Figure 17 is a side view of the top cover. As shown in FIG. 17, the top cover 217 includes a bottom surface 219 having a disk shape and a wall 221 formed along the circumference of the bottom surface 217. A plurality of holes 223 for allowing water in the cylindrical container 203 to flow into the outer casing 209 are formed in the wall 221. The hole 223 extends in a direction inclined by, for example, 30 degrees with respect to the radial direction of the circular bottom surface 219.

Further, a plurality of particles 225 are placed in the outer casing 209, and the plurality of particles 225 sway the hollow fiber membrane 207 in accordance with the flow of water flowing into the outer casing. The particles 225 may be any one as long as they have a specific gravity of more than 1.0 so as to be able to float in water without flowing down when flowing water in the outer casing 209. Examples of the material constituting the particles 225 include a resin, a ceramic, a stone, and the like, but are not limited thereto. Further, as the particles 225, a granular material made of a resin such as vinyl chloride resin, polystyrene, acrylic resin, polycarbonate, ABS resin, polyethylene, or polypropylene can be used. In addition, the resin particles and the stones may be mixed and used. In this case, when the flow rate of water is small, the stones sink, and the hollow fiber membranes are shaken by the particles of the resin, and the resinity is high when the flow rate of water is large. The granules float in the water, and stones can be used to shake the hollow fiber membrane. As the shape of the particles 225, a heart shape and a star can be cited. Shape, sphere, cube, cuboid, cylindrical, conical, etc., but are not limited thereto. Further, in order not to damage the hollow fiber membrane 207, the particles 225 preferably have no sharp shape. Further, when heart-shaped particles are used, the hollow fiber membrane can be effectively shaken, which is preferable. The particle size is preferably from 0.1 mm to 40 mm, and the mass is preferably from 0.1 g to 20 g.

Next, the action of the second embodiment will be described in detail.

When water flows into the cylindrical container 203 through the header, the water flows toward the closed end of the cylindrical container 203. Then, the water in the cylindrical container 203 flows into the outer casing 209 through the hole 223 of the top cover 217. The hole 223 is inclined with respect to the radial direction of the bottom surface 219, and thus the water that has passed through the hole 223 flows spirally so as to rotate around the hollow fiber membrane 207. Then, the water that has flowed into the outer casing 209 passes through the hollow fiber membrane 207, is purified, and is discharged from the purified water outlet pipe 215 through the space 213.

Further, when water flows into the outer casing 209, the particles 225 float in the outer casing 209 and collide with the hollow fiber membrane 207 in accordance with the water flow of the water. Then, when the particles 225 collide with the hollow fiber membrane 207, the hollow fiber membrane 207 is shaken. Further, the hollow fiber membrane 207 is shaken by the particles 225, whereby the turbidity adhering to the surface of the hollow fiber membrane 207 can be dropped.

As described above, according to the second embodiment of the present invention, it is possible to provide a new filter capable of dropping turbidity from the hollow fiber membrane 207.

Further, the second embodiment of the present invention can also be applied to a filter having a single purified water outlet pipe 215 as described above and the hollow fiber membrane cartridge 23 described in detail in the first embodiment, and is also applicable. The pre-filter 19 as described in detail in the first embodiment has a clean water outlet pipe 43 And a filter of the type that cleans the water outlet pipe 45.

Hereinafter, embodiments of the invention will be described in detail.

Hereinafter, the present invention will be described in more detail by way of examples.

[Examples] <Example 1>

A hollow fiber membrane module was produced using a hollow fiber membrane EX270T (membrane area: 0.28 m ² ) manufactured by Mitsubishi Rayon, and formed on the side surface of the inner container toward the lower side with respect to the longitudinal direction of the inner container by 15 mm. In a spacer manner, a hole having a diameter of 2.5 mm was opened at three places to make a filter.

<Water purifier water flow experiment>

Water passing condition of kaolin (kaoline) of 10 degrees, water temperature of 20 ° C, pressure of 0.1 MPa, filtration time of 120 minutes, cleaning time of 10 minutes, initial filtration flow rate (OUT-IN filtration) of 2.0 L/min Next, carry out the experiment.

Even if 4000 L of water having a turbidity of 10 degrees is circulated, the flow rate retention rate immediately after washing is 90% or more.

<Example 2>

In the plane perpendicular to the longitudinal direction, a total of 6 holes with a diameter of 2 mm are opened on the wall at intervals of 15 mm at two points of point symmetry, and the length is set to 100 mm, the outer diameter is 9.5 mm, and the inner diameter is A water-passing test was carried out in the same manner as in Example 1 except that the center tube of 7 mm was used.

Even if 4000 L of water having a turbidity of 10 degrees is passed, the flow rate retention rate immediately after washing is 90% or more.

<Example 3>

In the internal container, five pieces of heart-shaped granular materials made of vinyl chloride resin and polystyrene having a size of 14 mm and a mass of 7 g were accommodated, and Example 1 was Similarly, a water passing test was performed.

Even if 4000 L of water having a turbidity of 10 degrees is passed, the flow rate retention rate immediately after washing is 90% or more.

<Example 4>

The water-passing test was carried out in the same manner as in Example 1 except that the bottom cover was not provided (the bottom opening).

When 1000 L of water having a turbidity of 10 degrees was passed, the flow rate retention rate was 60%.

As is apparent from the above results, the filter of the invention of the present application can easily clean the turbidity in the hollow fiber membrane module accumulated in the filter.

1‧‧‧Water purifier

3‧‧‧ ordinary hydrant

5‧‧‧Special water hydrant

7, 9‧‧‧ lever

11‧‧‧ Valve

19‧‧‧Prefilter

21‧‧‧Adsorbent cartridge

23‧‧‧Hollow fiber membrane cartridge

25‧‧‧Management

27, 203‧‧‧ cylindrical container

29, 205‧‧‧ hollow fiber membrane module

31‧‧‧Ontology

33‧‧‧ container top cover

35‧‧‧O-ring

37, 117, 217‧‧ ‧ top cover

39‧‧‧Water inlet pipe

41‧‧‧Receiving Department

43,215‧‧‧Water purification pipe

45‧‧‧Washing water outlet pipe

47, 207‧‧‧ hollow fiber membrane

49‧‧‧ inside casing

51‧‧‧Outer casing

53, 211‧‧‧ potting materials

55, 213‧‧‧ space

57‧‧‧Cover top cover

59‧‧‧ openings

61‧‧‧ gap

63‧‧‧Cylindrical container

65‧‧‧Adsorbent Module

67‧‧‧Water Purification

69‧‧‧Water purification outlet

71, 209‧‧‧ shell

73, 115‧‧‧ openings

101‧‧‧Spiral flow forming member

103‧‧‧ Plate-like members

105‧‧‧Flow

107, 223‧‧ holes

109‧‧‧ entrance

111‧‧‧Export

113‧‧‧Center tube

121‧‧‧Hydro

201‧‧‧Filter

219‧‧‧ bottom

221‧‧‧ wall

A, B, C, D, E‧‧‧ arrows

Fig. 1 is a schematic view of a water purifier system having a prefilter according to an embodiment of the present invention.

Fig. 2 is a perspective view showing a water purifier according to an embodiment of the present invention.

Fig. 3 is a plan view showing a state in which a header of a prefilter according to an embodiment of the present invention is removed.

Figure 4 is a cross section taken along line IV-IV of Figure 3.

Figure 5 is a V-V section of Figure 3.

Fig. 6 is a cross section taken along line VI-VI of Fig. 3;

Fig. 7 is a perspective view showing an inner casing of an embodiment of the present invention.

Fig. 8 is a cross-sectional view showing a sorbent cartridge according to an embodiment of the present invention.

Fig. 9 is a cross-sectional view showing a filter according to a modification of the embodiment of the present invention.

FIG. 10 is a perspective view showing a spiral flow forming member of a filter according to a modification of the embodiment of the present invention.

FIG. 11 is a perspective view showing the inner casing of the filter according to the first modification of the embodiment of the present invention, and is a view for explaining the flow of water in the hollow fiber membrane module.

Fig. 12 is a side view showing still another example of the spiral flow forming structure.

Fig. 13 is a cross-sectional view showing a filter according to a second modification of the embodiment of the present invention.

Fig. 14 is a schematic view showing a modification of the water purifier system according to the embodiment of the present invention.

Fig. 15 is a schematic view showing a modification of the water purifier system according to the embodiment of the present invention.

Fig. 16 is a cross-sectional view showing a filter according to a second embodiment of the present invention.

Fig. 17 is a side view of a top cover provided in the filter according to the second embodiment of the present invention.

1‧‧‧Water purifier

3‧‧‧ ordinary hydrant

5‧‧‧Special water hydrant

7, 9‧‧‧ lever

11‧‧‧ Valve

Claims (19)

A purification system comprising: a first water plug; a second water plug different from the first water plug; and a water purifier disposed on an upstream side of the first water plug and having a hollow fiber membrane for purifying water a module, wherein when the first water plug is opened, the purified water purified by the hollow fiber membrane module flows out from the first water plug; and when the second water plug is opened, the hollow fiber membrane is cleaned The washing water of the hollow fiber membrane of the module flows out from the second water plug. The purification system according to claim 1, wherein the water purified by the hollow fiber membrane module and the water for cleaning the hollow fiber membrane module flow from a water inlet into the purification system. The purification system according to claim 1, wherein the purified water purified by the water purifier flows to the first water plug when the first water plug is opened and the second water plug is closed. The purification system according to claim 1, wherein the cleaning water of the hollow fiber membrane module that has been cleaned by the water purifier flows to the second portion when the second water plug is opened and the first water plug is closed. Water hydrant. The purification system according to any one of claims 2 to 4, wherein the water purifier includes a first filter, and the first filter is disposed at the water inlet and the first water plug and the Between the 2nd water plugs. The purification system according to claim 5, wherein the water purifier includes a second filter, and the second filter is disposed between the first filter and the first water plug. The purification system according to claim 6, wherein the water purifier includes a third filter, and the third filter is disposed between the second filter and the first water plug. The purification system according to any one of claims 5 to 7, wherein the first filter comprises the hollow fiber membrane module. The purification system according to claim 6, wherein the second filter has an adsorbent for adsorbing turbidity in water. The purification system of claim 9, wherein the adsorbent is activated carbon. The purification system of claim 9, wherein the adsorbent is an ion exchanger. The purification system according to claim 7, wherein the third filter comprises the hollow fiber membrane module, and the hollow fiber membrane module is configured to further purify water purified by the second filter. A filter for purifying water at the most upstream of the purification system, and comprising: a cylindrical container; a water inlet for allowing water to flow into the interior of the cylindrical container; and a hollow fiber membrane module disposed in the cylindrical shape Inside the container, with bundle The bundle is a columnar hollow fiber membrane, and the water flowing into the cylindrical container from the water inlet is purified; the purified water outlet is connected to the first water plug, and is used for purifying the hollow fiber membrane module. The clean water discharge and the wash water outlet are configured to be connectable to the second water plug different from the first water plug, and to discharge the water from which the hollow fiber membrane module has been cleaned. The filter according to claim 13, wherein the washing water outlet is formed on one end side of the opening of the cylindrical container, and the hollow fiber membrane module is disposed near the other end side of the cylindrical container, and includes a spiral flow forming structure, wherein the spiral flow forming structure converts a water flow that has flowed into the cylindrical container from the water inlet into a spiral flow, that is, a spiral that spirals around the hollow fiber membrane and flows toward the cleaning water outlet flow. The filter according to claim 14, wherein the spiral flow forming structure is a spiral flow forming member, the spiral flow forming member has a passage, and is formed on the other end side than the hollow fiber membrane, wherein the passage is It is configured to extend obliquely with respect to the axial direction of the cylindrical container and to allow water to pass through the inside thereof. The filter according to claim 14, wherein the hollow fiber membrane module includes a cylindrical outer casing surrounding the hollow fiber membrane, and the spiral flow forming structure extends through the outer casing. The through hole includes an inlet formed on an outer surface of the outer casing, and an outlet formed at a position deviated from a circumferential direction of the outer casing with respect to the inlet. The filter according to claim 13, wherein the hollow fiber membrane module has a center tube, and the center tube is disposed in the hollow fiber membrane bundled in a column shape and is hollow along the columnar shape The fiber membrane extends in the axial direction, and one end of the center tube is opened so that water flows into the inside, and a plurality of discharge ports are provided so that water flowing into the inside can be radially discharged toward the hollow fiber membrane. A filter cartridge is a filter cartridge for purifying water, and comprises: an outer casing disposed in a cylindrical container having a water inlet; and a hollow fiber membrane module disposed inside the outer casing and having a bundled column a hollow fiber membrane that purifies water flowing into the cylindrical container from the water inlet; the water outlet is connected to the first water plug, and is used to discharge purified water purified by the hollow fiber membrane module And the washing water outlet is configured to be connectable to the second water plug different from the first water plug, and to discharge the water from which the hollow fiber membrane module has been cleaned. a filter for purifying water, and comprising: a cylindrical container; a water inlet for allowing water to flow into the interior of the cylindrical container; The hollow fiber membrane module is disposed inside the cylindrical container, and has a hollow fiber membrane bundled in a columnar shape and an outer casing surrounding the hollow fiber membrane, and flows into the cylindrical container from the water inlet port, and further from the cylinder a water purification into the outer casing in the container; and a purified water outlet for discharging the purified purified water, wherein a plurality of particles are placed in the outer casing, and the plurality of particles flow into the outer casing The flow causes the hollow fiber membrane to shake.