JPH11169676A - Hollow fiber membrane module and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To turn liquid flow in the axial direction to nearly uniform distribution flow by dividing a hollow fiber membrane bundle group mounted to a vessel into plural pieces in the vicinity of at least one port and arranging space among the divided hollow fiber membrane bundles. SOLUTION: The hollow fiber membrane module bundle group 13 is constituted so as to mount a distribution member 7 and a port distributing member 12 to the hollow fiber membrane bundle 4 to bundle. The hollow fiber membrane bundle group 13 near the port 51 has the space 8. which is communicated with between the outside of the cross section vertical to the axis direction in the hollow fiber membrane bundle group 13 and the center part, and the distribution member 7, which is form dividing a flow passage into plural pieces in the cross-sectional direction vertical to the axis direction of the hollow fiber membrane bundle group 13. A permeated water flows-out from a permeated water port 53 of a hollow fiber membrane part, which is fixed with a resin 5 and has an opening part, and the concentrated water is discharged from a concentrated water port 52 having an end part sealed with a resin 6 and plurally divided. As a result, uniformly distributed flow is generated in the whole liquid flow passage between a raw water feed part and the concentrated water discharged part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow fiber membrane module used for purification of natural water such as river water or groundwater or advanced purification of tap water, and a method for producing the same. The hollow fiber membrane module obtained by the present invention can be used particularly in the field of water treatment in which long-term continuous operation is required at a high recovery rate and recovery of module performance is required by physical washing or the like.

[0002]

2. Description of the Related Art Recently, in water purification treatment of natural water such as river water and groundwater, a treatment method using a membrane separation technique has been attracting attention as a treatment method instead of coagulation and sedimentation. Modules using hollow fiber membranes are widely used for water purification because they can be attached to a container without concern for the shape of the container and can be easily physically cleaned.

[0003] Modules used for water purification require a module design with a high recovery rate (recovery rate = flow rate of permeated water to supply water) in order to maximize the recovery and effective use of supply water. . In addition, for the high recovery operation, not only the primary side of the membrane in the module is concentrated to a high concentration, but in the case of a reverse osmosis membrane or a nanofiltration membrane, the flow rate of the primary side of the membrane in the module is very small, The linear velocity on the film surface becomes very low. Generally, in this state, it is very difficult for an external pressure type module to uniformly distribute and supply without causing a drift in the entire area of the hollow fiber membrane surface. If a drift occurs in the module, the membrane cannot be used effectively, and the separation efficiency is significantly reduced. Also, when a high-concentration liquid flows at a very low speed on the primary side of the membrane in the module, foulant adheres and settles on the membrane surface, coating and deteriorating the membrane surface contributing to separation, and the separation ability is significantly reduced. Therefore, in water purification treatment requiring a high recovery rate, a module design that eliminates both drift and fouling is required.

However, in the conventional module, the hollow fiber membranes are bundled at an extremely high filling rate in order to suppress the drift, so that the uniform arrangement of the hollow fiber membranes is achieved and the module is designed to have a uniform distribution flow. Has been made. Further, a module is designed in which one end is fixed to a container with a resin, and the opposite end of the hollow fiber membrane is formed in a loop shape to generate a uniform distribution flow as a resistor.

Further, in order to suppress the drift, the hollow fiber membranes are wound up in a crossed arrangement to form a hollow fiber membrane bundle, and a tubular member is provided in the hollow fiber membrane bundle to control the flow of the hollow fiber membrane bundle to the center in the cross-sectional direction. Hollow fiber membrane modules having a module structure in which they are formed or have an axial flow are disclosed in JP-A-52-49987, JP-A-52-63179, and JP-B-54-57.
No. 96 and JP-A-63-1404.

A hollow fiber membrane module in which several bundles of hollow fiber membranes are arranged in a container to form a hollow fiber membrane bundle group and both ends are fixed with resin is disclosed in JP-A-61-103503 and JP-A-9-103503.
No. 206563 discloses this.

Further, in order to supply raw water to a central portion in a cross-sectional direction perpendicular to the hollow fiber membrane bundle, a hollow fiber membrane module having a through-hole in a resin end portion for fixing the hollow fiber membrane bundle is disclosed in Japanese Patent Application Laid-Open No. 9-1997.
187628 and JP-A-9-220446. Further, as a method of manufacturing the through hole at the resin end, a module manufacturing method in which a tubular member or a mold of the through hole is mounted in advance, and the end of the hollow fiber membrane bundle is removed after bonding is disclosed in JP-A-9-187628, JP-A-9-
No. 220446 discloses this.

[0008]

However, in a module in which hollow fiber membranes are bundled at an extremely high filling rate, the hollow fiber membrane is easily damaged when the hollow fiber membrane bundle is inserted into a container, and module production becomes very difficult. Become. In addition, due to the low gap, when the module size increases, the flow resistance in the radial direction of the cross section of the hollow fiber membrane bundle increases, and the water to be treated is not uniformly distributed in the radial direction. As a result, the drift is promoted, the membrane is not used effectively, and the separation efficiency is deteriorated. Furthermore, in the water purification treatment that requires a high recovery rate, the primary side of the membrane is concentrated to a high concentration. At a high filling rate, not only the surface of the hollow fiber membrane but also the gaps between the hollow fiber membranes are easily fouled. The quantity decreases and long-term continuous operation becomes difficult. On the other hand, when the foulant is physically cleaned, the increase in the filling rate of the hollow fiber membrane hinders the cleaning, which lowers the cleaning efficiency.

In a module in which one end is fixed to a container with a resin and the opposite end of the hollow fiber membrane is formed in a loop shape to generate a uniform distribution flow as a resistor, the concentration is increased at the end of the loop-shaped hollow fiber membrane. Fouling is likely to occur due to water. Furthermore, when physically cleaning the foulant, the shape of the hollow fiber membrane bundle group having a loop at one end is easily damaged and cannot be reproduced. Also, in order to suppress the drift, the hollow fiber membranes are wound up in an intersecting arrangement, and a tubular object is provided in the hollow fiber membrane bundle to cause a flow to the central portion in the cross-sectional direction of the hollow fiber membrane bundle, or an axial flow. It is difficult to generate a uniform distribution flow in all the liquid flow paths from the supply unit to the concentrated water discharge unit in the module having the above. Further, since there is a portion where the hollow fiber membranes intersect in the flow direction, fouling is easily caused by the concentrated water concentrated at a high concentration. As a result, it becomes difficult to reduce the amount of water permeation and to perform long-term continuous operation. Further, when physically cleaning the foulant, the hollow fiber membrane wound up in an intersecting arrangement hinders the cleaning and elimination of the foulant and lowers the cleaning efficiency.

In a hollow fiber membrane module in which several bundles of hollow fiber membranes are arranged in a container to form a group of hollow fiber membrane bundles and both ends are fixed with resin, foulants tend to accumulate in the hollow fiber membrane gaps in the hollow fiber membrane bundle. This makes it difficult to reduce the amount of water permeated and to operate continuously for a long period of time. Furthermore, when physically cleaning the foulant, it becomes difficult to remove the foulant. Further, in a hollow fiber membrane module having a structure in which a through hole is formed in a resin end portion for fixing the hollow fiber membrane bundle and supply water is supplied to a central portion in a cross-sectional direction perpendicular to the hollow fiber membrane bundle, supply water is supplied to the resin end portion. Although the dispersion is uniform near the plurality of ports opened in the section, it is difficult to uniformly disperse the components downstream of the hollow fiber membrane bundle in the axial direction and the vicinity of the outlet port. Furthermore, in the manufacturing method of providing a through hole at the resin end, before fixing the hollow fiber membrane bundle to the resin, inserting a tubular material or a mold of the through hole into the hollow fiber membrane bundle forming the through hole, After adhesively fixing the hollow fiber membrane bundle, a tubular material for forming a through hole and a mold for the through hole are removed. Therefore, there is a very high possibility that the hollow fiber membrane will be bent or damaged. In addition, when the diameter is small and the interval between the through holes is small (for example, on the order of several millimeters), it is very difficult to insert and remove the tube-like material and the mold for the through hole into the hollow fiber membrane bundle.

In a water purification treatment requiring a high recovery rate,
Drift and fouling solutions have two trade-offs, and it is very difficult to eliminate both at the same time.

[0012] The present invention has been made to solve the above problems, and without filling the hollow fiber membrane with an extremely high filling rate,
The hollow fiber membrane can be inserted into the container without damaging it, and even during high recovery operation, a uniform distribution flow is generated without causing drift, enabling physical cleaning with excellent foulant elimination during cleaning. And a method for manufacturing the same.

[0013]

The present invention is as follows. (1) Attach the hollow fiber membrane bundle group to a container, fix one end or both ends with resin, and connect at least one port A communicating with the opening of the hollow fiber membrane to the outer surface of the hollow fiber membrane provided on the side of the container. In a hollow fiber membrane module having at least one port B communicated with and at least one port C communicated with the outer surface of the hollow fiber membrane provided at the resin end of the hollow fiber membrane fixed, the hollow fiber membrane bundle includes a hollow fiber membrane bundle group. A distribution member that divides the flow path into a plurality of sections in a cross-sectional direction perpendicular to the axial direction of the hollow fiber membrane bundle group attached to the container near at least one port B. A hollow fiber membrane module having a space between hollow fiber membrane bundles. (2) The hollow fiber membrane module according to the above (1), wherein the port C communicating with the outer surface of the hollow fiber membrane provided at the resin end of the hollow fiber membrane is divided into a plurality of parts and arranged regularly. (3) The hollow fiber membrane module according to the above (1) or (2), wherein the filling rate of the hollow fiber membrane is 40% to 70%. (4) Any of (1) to (3) above, wherein the length of the hollow fiber membrane that is not bonded and fixed is at least 1.01 times the distance between the bonded portions at both ends and has a structure capable of swinging. Hollow fiber membrane module. (5) The hollow fiber membrane module according to the above (1), wherein the arrangement of the hollow fiber membrane bundles is spiral in the cross-sectional direction of the hollow fiber membrane bundle group. (6) The hollow fiber membrane module according to (2), wherein the arrangement of the plurality of ports C communicating with the outer surface of the hollow fiber membrane provided at the resin end portion of the hollow fiber membrane is helical. (7) Attach the hollow fiber membrane bundle group to the container, fix one end or both ends with resin, and connect at least one port A communicating with the opening of the hollow fiber membrane to the outer surface of the hollow fiber membrane provided on the side of the container. In a method for manufacturing a hollow fiber membrane module having at least one port B communicated with and at least one port C communicated with an outer surface of a hollow fiber membrane provided at a resin end portion of the hollow fiber membrane fixed, the hollow fibers are bundled into hollow fibers. With a membrane bundle, the hollow fiber membrane bundle is arranged on a distribution member for distributing the flow path and a port dispersion member for forming a plurality of ports at the resin end portion of the hollow fiber membrane fixed, and wound into a cylindrical shape, The hollow fiber membrane bundle group is fixed, the ends of the hollow fiber membrane bundle group are fixed with resin, and the fixed ends are cut to form spaces between the divided hollow fiber membrane bundles and regularly. Forming a distributed axial flow path,
A hollow fiber membrane comprising a plurality of regularly distributed ports C formed at one end of the fixed end and an open end of the hollow fiber membrane formed at the other end. Module manufacturing method. (8) The method for producing a hollow fiber membrane module according to the above (7), wherein the arrangement of the hollow fiber membrane bundles is spiral in the cross-sectional direction of the hollow fiber membrane bundle group. (9) The method for producing a hollow fiber membrane module according to the above (7), wherein the arrangement of the plurality of ports C communicating with the outer surface of the hollow fiber membrane provided at the resin end portion of the hollow fiber membrane is spiral.

[0014] By adopting the structure as described in the above (1), there is no uneven flow in the radial direction of the module.
The axial liquid flow can be made into a substantially uniform distribution flow, and the flow uniformly distributed in the supply section (port B or port C) can be continued to the concentrated water discharge port (port C or port B).

The hollow fiber membrane in the present invention is a hollow fiber-shaped separation membrane, and its membrane material, membrane structure and membrane dimension are not particularly limited. For example, a cellulose acetate-based or polyamide-based asymmetric membrane, or a polyamide-based or polysulfone-based composite membrane can be used.

The filling rate of the hollow fiber membrane bundle in the present invention is defined by the following equation. The filling factor is 40-80%, preferably 50-65%. Filling rate (%) = (hollow fiber membrane outer diameter ² x π / 4 x number of hollow fiber membranes) / (area of the narrowest section perpendicular to the axial direction of the vessel empty tower)
× 100

The resin in the present invention is not particularly limited as long as the hollow fiber membrane can be sealed in a liquid-tight manner. For example, a thermosetting resin such as a polyurethane resin, an epoxy resin, and a silicone resin can be used, but a thermoplastic resin can be used if necessary.

The hollow fiber membrane bundle in the present invention may be any one in which a plurality of hollow fiber membranes are bundled in the same direction, preferably one in which several tens to several hundreds of hollow fiber membranes are bundled. Preferably, 50 to 200 hollow fiber membranes are bundled.

The hollow fiber membrane bundle group in the present invention is a group of a plurality of hollow fiber membrane bundles, and communicates with a distribution member for distributing a flow path and an outer surface of a hollow fiber membrane provided at a resin end portion of the hollow fiber membrane fixed. A port dispersing member that divides a port C into a plurality of ports. In the cross-sectional direction perpendicular to the axial direction of the hollow fiber membrane bundle group, the arrangement of the hollow fiber membrane bundle is not particularly limited, but is preferably regularly arranged, more preferably concentric, spiral, honeycomb core-shaped arrangement. No. Further, it is preferable to have a space near at least one port B communicating with the outer surface of the hollow fiber membrane provided on the side surface of the container and communicating with a central portion in a cross-sectional direction perpendicular to the axial direction of the hollow fiber membrane bundle group.

The distribution member in the present invention is not particularly limited as long as it has a structure in which the intervals between the hollow fiber membrane bundles are regularly arranged and the flow paths are distributed. For example, the distribution sheet members 7 and 1 shown in FIG.
2 can be used. The material is not particularly limited as long as it is adhered to a resin for module adhesion such as urethane resin and epoxy resin, does not elute, does not damage the hollow fiber membrane, and is not easily contaminated by foulant.
Examples include polypropylene, polyvinyl chloride, polyester, polysulfone, polyethersulfone, and fluororesin.

In the present invention, the above (5), (6),
The helical arrangement described in (8) and (9) is not particularly limited as long as the hollow fiber membrane bundle is spirally spread from the center of the container in the axial direction, but is preferably in the axial direction of the container. In the polar coordinates (r, θ) display on the axial cross section of the container with the center of the cross section as the origin, the trajectory of the axial cross section of the hollow fiber membrane bundle and the trajectory of the axial cross section of the port C are r = αθ
A sequence represented by ^K + β (constants α, β, and k are real numbers), more preferably a parabolic helix sequence with k = 1/2.

In the present invention, the port C communicating with the outer surface of the hollow fiber membrane provided at the resin end for fixing the closed end of the hollow fiber membrane according to the above (2) is a raw water supply port or concentrated water of the module. Concentration port for wastewater, at least one
Having one. Preferably, the plurality of ports have a substantially even regular arrangement. More preferably, it has a concentric, spiral, or honeycomb core arrangement.

In the present invention, the length of the hollow fiber membrane to which the hollow fiber membrane bundle is not bonded and fixed is 1.01 of the distance between the bonded parts at both ends.
It has a length that is at least twice as long, preferably at least 1.05 times as long, and a structure in which the hollow fiber membrane can swing in the container.
This allows the hollow fiber membrane to oscillate during the water purification treatment, thereby suppressing adhesion and accumulation of foulant on the surface of the hollow fiber membrane and between the hollow fiber membranes.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a hollow fiber membrane module of the present invention, FIG. 2 shows a cross-sectional view near a supply port, and FIG. 3 shows a cross-sectional view of a concentration port at an adhesion end.

The hollow fiber membrane module of the present invention comprises a container 1 having a supply port 51 into which water is supplied as shown in FIG. 1, a hollow fiber membrane bundle group 13 mounted in the container 1, and a treated permeate. And caps 2 and 3 for discharging concentrated water.
As shown in FIG. 4, the hollow fiber membrane bundle group 13 is configured such that the hollow fiber membrane bundles 4 are bundled with the distribution member 7 and the port dispersion member 12 mounted thereon. The hollow fiber membrane bundle group near the port 51 flows in the space 8 communicating between the outside and the center of the cross section perpendicular to the axial direction of the hollow fiber membrane bundle group and the cross sectional direction perpendicular to the axial direction of the hollow fiber membrane bundle group. It has a distribution member 7 for dividing the road into a plurality. The distribution channel 9 divided into a plurality of portions is regularly distributed as shown in FIG. The hollow fiber membrane bundle 4 is mounted so that the length of the hollow fiber membrane that is not bonded and fixed is at least 1.05 times the distance between the bonded portions at both ends, and can swing in the container 1. . The permeated water flows out of the permeated water port 53 of the hollow fiber membrane portion having the opening, which is fixed by the resin 5, and the concentrated water is discharged from the concentrated ports 52 dispersed at a plurality of ends sealed with the resin 6. . FIG. 3 shows a cross-sectional view of the distributed concentration port 52 portion.

An example of the method for producing the hollow fiber membrane module of the present invention will be described below. Hollow fiber membrane module
The hollow fiber membrane bundles are aligned in the valleys of the distribution member 7 and the port dispersion member 12, and the aggregate of sheet-like hollow fiber membrane bundles is wound into a roll to form a hollow fiber membrane bundle group 13. At this time, since the port dispersion member 12 forms an opening of the concentration port at the resin fixed end, the manufacturing process is simplified if a part of the space separated by the corrugated sheet and the plane sheet is sealed in advance with resin. Is done. The resin at this time is not particularly limited as long as it is the same as the resin to which the end of the hollow fiber membrane is fixed.
The hollow fiber membrane bundle assembly 13 wound into a roll is inserted into the container 1, the molds 14 and 15 are attached to both ends, and the resin is applied to both ends of the hollow fiber membrane bundle group by a centrifugal bonding method or a pot bonding method. Impregnated and bonded and fixed. The port dispersing member 12 is also impregnated with the resin at the same time and fixed by adhesion. After curing the resin, remove the mold and cut off the excess. At this time, in the resin end on the closed end side of the hollow fiber membrane, a space portion divided by the corrugated sheet and the plane sheet of the port dispersion member 12 is formed as a plurality of resin end through holes.

Through the above manufacturing steps, a hollow fiber membrane module capable of generating a uniform distribution flow in all liquid flow paths from the raw water supply section to the concentrated water discharge section is obtained.

[0028]

EXAMPLES Hereinafter, the present invention will be described specifically with reference to examples, but the present invention is not limited to these examples.

Example 1 Polyamide nanofiltration hollow fiber membrane (hollow fiber membrane outer diameter: 300 μm)
, A hollow fiber membrane with an inner diameter of 200 μm) are bundled into a hollow fiber membrane bundle, and 32 hollow fiber bundles are arranged on a distribution member (15 mm in axial direction) made of vinyl chloride and a port dispersion member whose end is sealed with resin. (4800 hollow fibers in total) were aligned, and wound into a roll to form a hollow fiber membrane bundle group. This hollow fiber membrane bundle group is placed in a cylindrical container made of polycarbonate, and the length of the hollow fiber membrane that is not bonded and fixed to the hollow fiber membrane bundle is 1.05, which is the distance between the bonded portions at both ends.
It was inserted so as to be twice as long. The filling factor was 53%, and both ends were centrifugally bonded with epoxy resin, and the surplus portion was cut to produce a hollow fiber membrane module. Using this module, the linear velocity dependency of the calcium chloride removal rate was measured under the conditions of a supply pressure of 3 kg / cm ² , a temperature of 25 ° C., and a pH of 6, using an aqueous solution of calcium chloride having a concentration of 500 ppm. As shown in FIG. 6, the removal ratio in the low linear velocity region (at 2 m / min) was 0.9. At a linear velocity of 2.5 m / min or more, the removal rate became almost constant. Removal rate ratio = (Removal rate in module) / (Removal rate of hollow fiber membrane) Linear velocity = (Feed water flow rate + Concentrated water flow rate) / 2 / (Void area of cross section perpendicular to the container axial direction)

Using one hollow fiber membrane module of Example 1, an activated carbon filter (TCV manufactured by ADVANTEC, TC
Continuous operation was performed with tap water pressure (2.0 to 2.3 kg / cm ² ) at a recovery rate of 80% using Otsu city tap water through C-W1SOCO). During the continuous operation period, a constant recovery rate operation was performed without performing washing. The water permeation ratio during continuous operation changes as shown in FIG. 7, and the water permeation ratio after 48 hours and one month is:
It was 0.96, and the decrease in water permeability was very small. Permeability ratio = (Permeability after one month) / (Permeability after 48 hours)

COMPARATIVE EXAMPLE 1 Using the same hollow fiber membrane and cylindrical container as in Example 1, 6900 hollow fiber membranes were bundled into a single bundle at a filling rate of 77%, and the distribution member and the port dispersion member were not used. A hollow fiber membrane module was manufactured. The linear velocity dependence of the calcium chloride removal rate was measured using this module under the conditions of a supply pressure of 3 kg / cm ² , a temperature of 25 ° C., and a pH of 6, using a 500 ppm aqueous solution of calcium chloride.
As shown in the figure, the removal ratio in the low linear velocity region (at 2 m / min) was 0.7.

Using one hollow fiber membrane module of Comparative Example 1, an activated carbon filter (TCV manufactured by ADVANTEC, TC
Continuous operation was performed with tap water pressure (2.0 to 2.3 kg / cm ² ) at a recovery rate of 80% using Otsu city tap water through C-W1SOCO). During the continuous operation period, a constant recovery rate operation was performed without performing washing. The water permeation ratio during the continuous operation changes as shown in FIG. 7, and the water permeation ratio after 48 hours and one month is 0.1.
It was 65, and the water permeation amount was greatly reduced.

Comparative Example 2 Using the same hollow fiber membrane and cylindrical container as in Example 1, 4750 hollow fiber membranes were bundled into a single bundle, and the filling rate was 53%, without using a distribution member and a port dispersion member. A hollow fiber membrane module was manufactured. The linear velocity dependence of the removal rate of calcium chloride was measured using this module under the conditions of a supply pressure of 3 kg / cm ² , a temperature of 25 ° C., and a pH of 6 using an aqueous solution of calcium chloride having a concentration of 500 ppm. As shown, the removal ratio in the low linear velocity region (at 2 m / min) was 0.3.

Table 1 shows a list of the results of Example 1 and Comparative Examples 1 and 2.

[0035]

[Table 1]

[0036]

The hollow fiber membrane module of the present invention is required to purify natural water such as river water or groundwater or to purify advanced tap water, and in particular to require long-term continuous operation with a high recovery rate.
In the water treatment field where recovery of membrane performance is required by physical cleaning, etc., even when the inside of the module is operated at a low linear velocity, the uniform dispersed flow flows from the supply unit to the concentrated drainage outlet without uneven flow. Can be effectively used to increase the separation efficiency, suppress the adhesion and accumulation of foulants, and perform continuous and stable operation without a significant decrease in water permeation. Further, at the time of washing, a uniform distribution flow is created in a cross section perpendicular to the axial direction of the hollow fiber membrane bundle of the washing medium, so that foulants detached due to the washing effect can be easily removed.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a hollow fiber membrane module according to the present invention.

FIG. 2 is a sectional view taken along line AA ′ showing an example of a supply water distribution portion near a supply port.

FIG. 3 is a cross-sectional view taken along the line BB ′ showing an example of a resin fixing portion having a plurality of dispersed ports.

FIG. 4 is an explanatory view of a hollow fiber membrane bundle group and a method of manufacturing the same.

FIG. 5 is a schematic view showing an example in which the hollow fiber membrane bundle group is mounted on a container and a mold.

FIG. 6 is a graph showing the linear velocity dependence of the removal rate.

FIG. 7: Results of continuous operation at a recovery rate of tap water of 80%

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 4 Hollow fiber membrane bundle 5, 6 Fixed resin 7 Distribution member 8 Communicated space 9 Distribution channel 11 Resin sealing part 12 Port dispersion member 13 Hollow fiber membrane bundle group 14, 15 Mold 51 Supply port (port B) 52 Concentration Port (Port C) 53 Transparent port (Port A)

Claims (9)

[Claims] 1. A hollow fiber membrane bundle group is mounted on a container, one or both ends of which are fixed with resin, at least one port A communicating with an opening of the hollow fiber membrane, and a hollow fiber membrane provided on a side surface of the container. In a hollow fiber membrane module having at least one port B communicating with the surface and at least one port C communicating with the outer surface of the hollow fiber membrane provided at the resin end portion of the hollow fiber membrane, the hollow fiber membrane bundle has a hollow fiber membrane. A distribution member that divides a flow path into a plurality of sections in a cross-sectional direction perpendicular to the axial direction of the bundle group is provided, and the hollow fiber membrane bundle group attached to the container near at least one port B is divided into a plurality of pieces. A hollow fiber membrane module, wherein a space is provided between the formed hollow fiber membrane bundles. 2. The hollow fiber membrane module according to claim 1, wherein the ports C communicating with the outer surface of the hollow fiber membrane provided at the resin end of the hollow fiber membrane are divided into a plurality of parts and arranged regularly. 3. The hollow fiber membrane module according to claim 1, wherein the filling rate of the hollow fiber membrane is 40% to 80%. 4. The structure according to claim 1, wherein the length of the hollow fiber membrane that is not bonded and fixed is at least 1.01 times the distance between the bonded portions at both ends and has a structure capable of swinging. Hollow fiber membrane module. 5. The hollow fiber membrane module according to claim 1, wherein the arrangement of the hollow fiber membrane bundles is spiral in the cross-sectional direction of the hollow fiber membrane bundle group. 6. The hollow fiber membrane module according to claim 2, wherein the arrangement of the plurality of ports C communicating with the outer surface of the hollow fiber membrane provided at the resin end portion of the hollow fiber membrane is helical. 7. A hollow fiber membrane bundle group is mounted on a container, one end or both ends are fixed with a resin, at least one port A communicating with an opening of the hollow fiber membrane, and a hollow fiber membrane provided on a side surface of the container. In a method for manufacturing a hollow fiber membrane module having at least one port B communicating with the surface and at least one port C communicating with the outer surface of the hollow fiber membrane provided at the resin end of the hollow fiber membrane, the hollow fiber membranes are bundled. The hollow fiber membrane bundle is arranged on a distribution member for distributing the flow path of the hollow fiber membrane bundle and a port dispersion member for forming a plurality of ports at the resin end portion of the hollow fiber membrane fixed, and is formed into a cylindrical shape. Winding, as a hollow fiber membrane bundle group, fixing the ends of the hollow fiber membrane bundle group with resin,
By cutting the fixed end, a space is arranged between the divided hollow fiber membrane bundles, and a regularly distributed axial flow path is formed.Furthermore, at one end of the fixed end, A method for manufacturing a hollow fiber membrane module, comprising: forming a plurality of regularly dispersed ports C; and forming an open end of the hollow fiber membrane at the other end. 8. The method for producing a hollow fiber membrane module according to claim 7, wherein the arrangement of the hollow fiber membrane bundles is helical in the cross-sectional direction of the hollow fiber membrane bundle group. 9. The method for manufacturing a hollow fiber membrane module according to claim 7, wherein the arrangement of the plurality of ports C communicating with the outer surface of the hollow fiber membrane provided at the resin end portion of the hollow fiber membrane is helical.