JP4834984B2 - Hollow fiber membrane module and cartridge replacement method thereof - Google Patents

Description

  The present invention relates to a hollow fiber membrane module in which a cartridge is mounted in a housing and a method for exchanging the cartridge, and more particularly, a hollow fiber in which the housing and the cartridge are easily attached and detached and the cleaning efficiency of the hollow fiber membrane by compressed air is improved. The present invention relates to a method for replacing a membrane module and a cartridge.

  Generally, a cartridge-type hollow fiber membrane module has a structure in which a cartridge including a hollow fiber membrane bundle in which approximately several hundred to several tens of thousands of hollow fiber membranes are bundled is mounted in a housing. In such a hollow fiber membrane module, it is necessary to periodically replace the hollow fiber membrane. In that case, the cartridge must be extracted as follows. That is, in the case where the housing is installed in a vertical position, a description will be given using FIG. 7. First, the band coupling 24 is removed and the upper member 22 of the housing is removed. The cartridge 26 must be lifted and removed from the lower member 23 of the housing until the lowermost part of the cartridge 26 reaches the height of the joining position 25 between the upper member 22 and the lower member 23 of the housing. If the joining position 25 between the upper member 22 and the lower member 23 of the housing is 2.5 m from the floor and the total length of the cartridge is 2 m, the cartridge must be lifted upward by at least 4.5 m. For this reason, buildings for installing hollow fiber membrane modules are limited to those with high ceilings, and even when newly installed, it is necessary to increase the height of the ceiling to such a level that cartridges can be attached and detached, which greatly increases construction costs. Connected.

  In order to solve this problem, for example, Patent Document 1 discloses a module in which a housing is divided into a plurality of parts in the longitudinal direction. However, in the module disclosed in this document, in consideration of the case where the cartridge is pulled out from the housing, it is necessary to provide the cartridge itself with a means for pulling the cartridge upward. Since the cartridge mounted in the housing for the purpose of suppressing the increase in the thickness is made thin, it is difficult to provide a large tap for attaching a screw-type suspension having sufficient strength. In addition, the hanging tool can be always attached to the cartridge by welding or the like, but there is a problem that the hanging tool interferes with the housing.

  Further, as a method for joining the cartridge and the housing, there is a method as disclosed in Patent Document 2. That is, in the case of a relatively small hollow fiber membrane module, the cartridge can be sandwiched between two members constituting the flange and joined by band coupling. This method cannot be used. Therefore, the cartridge and the housing are clamped with a screw cap and fixed. However, in the method disclosed in Patent Document 2, in order to firmly tighten the screwed cap that is a fastening member, the hollow fiber membrane module is fixed to a frame or the like, and the cap is tightened using a tightening jig such as a bell trench. It was a very time-consuming method.

Furthermore, as disclosed in Patent Document 2, when the gap between the cartridge and the housing communicates the supply port and the discharge port of the compressed air, the supplied compressed air is more resistant than the hollow fiber membrane portion having a large resistance. There is also a problem that the hollow fiber membrane is not sufficiently shaken by the compressed air because the gas flows preferentially through the gap portion smaller than.
JP 2003-126661 A JP 2000-157845 A

  An object of the present invention is to provide a hollow fiber membrane module and a cartridge replacement method that solve the above-described conventional problems, facilitate attachment / detachment of the housing and the cartridge, and improve the cleaning efficiency of the hollow fiber membrane with compressed air. To do.

  The hollow fiber membrane module of the present invention that achieves the above object is characterized by the following configuration.

(1) A hollow fiber membrane module in which a cartridge in which a hollow fiber membrane bundle is disposed in a cylindrical case is housed in a housing composed of three or more members that can be divided in the longitudinal direction. It is at a distance in the longitudinal direction of the housing, which has a lower raw liquid supply port and concentrate exhaust outlet and the filtrate outlet in this order, between the concentrate outlet and said filtrate outlet The cartridge can be divided in the longitudinal direction, and the cartridge is sandwiched between the two members between the concentrate discharge port and the filtrate outlet, and further divided into the stock solution supply port side from the sandwiched position. A hollow fiber membrane module having a possible position .

(2) The housing has a concentrate supply port, a concentrate discharge port, and a filtrate outlet in this order at positions separated from each other in the longitudinal direction of the housing, and the housing solution supply port and the concentrate discharge port in at least one transverse plane between the hollow fiber membrane module having the constitution that you not be sealed member a gap of the with the housing cartridge is disposed (1).

(3) The hollow fiber membrane module according to (1) or (2), wherein a suspension is provided on at least one of the three or more members.

(4) At least one of the two members has a concave portion in a cartridge holding portion , and the cartridge has a flange portion that fits into the concave portion. (1) to (3) The hollow fiber membrane module in any one.

(5) A cartridge replacement method for a hollow fiber membrane module in which a cartridge in which a hollow fiber membrane bundle is disposed in a cylindrical case is housed in a housing composed of three or more members that can be divided in the longitudinal direction. Te, said housing, at a distance in the longitudinal direction of the housing, which has a lower raw liquid supply port and concentrate exhaust outlet and the filtrate outlet in this order, the concentrate exhaust outlet and said filtrate outlet Can be divided in the longitudinal direction between the concentrated solution discharge port and the filtrate outlet, and in a state where the cartridge is sandwiched between the two members, the stock solution supply port is more than the sandwiched position. replacing the cartridge, characterized in that divided by dividable position of the side, desorbed from the previous SL housing.

  According to the present invention, a hollow fiber membrane module and a cartridge replacement method in which the housing and the cartridge can be easily attached and detached, and the cartridge replacement time can be further shortened as the number of modules increases. In addition, the hollow fiber membrane can be more efficiently cleaned with compressed air.

  The best embodiment of the present invention will be described below with reference to the drawings, taking as an example the case where the present invention is applied as a filter for clean water.

  FIG. 1 is a schematic cross-sectional view of a hollow fiber membrane module according to the present invention. The hollow fiber membrane module 1 stores a cartridge 5 in which a hollow fiber membrane bundle 8 is disposed in an inner cylinder 6 (cylindrical case) in a housing composed of a plurality of members 2, 3, and 4 that can be divided in the longitudinal direction. It becomes.

  The hollow fiber membrane bundle 8 constituting the cartridge 5 is configured by bundling approximately several hundred to several tens of thousands of hollow fiber membranes, and both ends thereof are bonded and focused by the resins 13a and 13b and fixed to the inner cylinder 6. Yes. Adhesive bundling by the resin is such that only the hollow fiber membranes are sealed on the filtrate outlet 12 side, and the end faces of the hollow fiber membranes are open. On the other hand, on the undiluted solution supply port 9 side, resin is infiltrated and sealed between the hollow fiber membranes and inside each hollow fiber membrane. The resin 13b is provided with a plurality of through holes 15. For the resins 13a and 13b that adhere and converge the hollow fiber membrane bundle, it is preferable to use a polymer material such as an epoxy resin, a urethane resin, or an epoxy acrylate resin that is a general-purpose product and inexpensive and does not affect the water quality.

  At this time, as shown in FIG. 1, the positions of the lowermost surface of the resin 13b and the lowermost surface of the cartridge 5 do not coincide with each other so that the lowermost surface of the cartridge 5 protrudes from the lowermost surface of the resin 13b. Is preferably about 3 to 100 mm. This is because when compressed air is sent to the hollow fiber membrane bundle 8 through the through-holes 15 and the hollow fiber membranes are shaken and washed, an air pocket is created between the lowermost surface of the resin 13b and the lowermost surface of the cartridge 5, and each through-hole is formed. This is because the compressed air is blown out uniformly from 15.

  The material of the hollow fiber membrane constituting the hollow fiber membrane bundle 8 is not particularly limited. Polysulfone, polyethersulfone, polyacrylonitrile, polyimide, polyetherimide, polyamide, polyetherketone, polyetheretherketone, polyethylene, polypropylene, ethylene -A vinyl alcohol copolymer, cellulose, cellulose acetate, polyvinylidene fluoride, an ethylene-tetrafluoroethylene copolymer, polytetrafluoroethylene, or a combination thereof may be used. The outer diameter of the hollow fiber membrane is preferably in the range of 0.3 mm to 3 mm, and the film thickness is preferably in the range of 0.1 mm to 1 mm. This is because if the outer diameter of the hollow fiber membrane is too small, the hollow fiber membrane breaks during handling of the hollow membrane when manufacturing the hollow fiber membrane module, and during filtration and washing when using the hollow fiber membrane module. This is because there is a problem such as damage, and conversely, if the outer diameter is too large, the number of hollow fiber membranes that can be inserted into a cylindrical case of the same size is reduced and the filtration area is reduced. On the other hand, with regard to the film thickness, if the film thickness is too small, there is a problem that the film is broken due to pressure in the case of the external pressure type hollow fiber membrane module as in this embodiment. There are problems such as leading to an increase in bills.

  As described above, in the present invention, the hollow fiber membrane bundle 8 is not exposed and is accommodated in the inner cylinder 6 constituting the cartridge 5, but this means that the cartridge 5 and the members 3 and 4 constituting the housing are attached and detached. This is to prevent the hollow fiber membrane from being damaged by rubbing against the inner surfaces of the members 3 and 4 constituting the housing, or from being broken and damaged between the adhesive converging portions at both ends. . Further, when the cartridge is transported, it is not necessary to separately cover the hollow fiber membrane with a cover or the like in order to prevent damage to the hollow fiber membrane, which is very convenient.

  The housing is composed of a plurality of members 2, 3, and 4 that can be divided in the longitudinal direction and are arranged in this order. The member 2, sometimes referred to as a cap, is used when a cartridge or the like is lifted and extracted. Hanging tools 14a and 14b are provided. Further, the filtrate outlet 12 is provided in the member 2, the concentrate discharge port 11 and the stock solution supply ports 9, 10 are provided in the member 4. It is configured to be located between the outlet 11 and the filtrate outlet 12. By configuring the joining position 16b between the member 3 and the member 4 constituting the housing to be located between the concentrate outlet 11 and the filtrate outlet 12, the member 2 constituting the housing, as will be described later, 3, the cartridge 5 can be pulled out from the member 4 that is always installed, and at that time, connected to the stock solution supply ports 9 and 10 and the concentrate discharge port 11 attached to the member 4 constituting the housing. Therefore, it is not necessary to remove the existing piping, and the labor for replacing the cartridge 5 can be greatly reduced. Further, by attaching the hanger 14a, 14b to the member 2 constituting the housing, the hanger 14a, 14b is not subject to interference by the band couplings 7a, 7b, and several types of housings having different joining positions 16b of the members 3, 4 are used. Even in the case of manufacturing as a product, the member 2 can be manufactured as a common part with a lifting tool, and the manufacturing efficiency can be improved.

  1 is shown in detail in FIG. 2, and the BB cross section is shown in FIG. According to the present invention, as will be described later, in at least one transverse section between the stock solution supply port 10 and the concentrate discharge port 11, the member 4 and the inner cylinder 6 constituting the housing are sealed with, for example, an O-ring. It is preferable to eliminate the gap between the two by the member 27.

  Examples of the material of the members 2, 3, and 4 constituting the housing and the inner cylinder 6 of the cartridge include polyolefins such as polyethylene, polypropylene, and polybutene, polytetrafluoroethylene (PTFE), PFA, FEP, EPE, ETFE, PCTFE, and ECTFE. , Fluorine resins such as PVDF, and chlorine resins such as polyvinyl chloride and polyvinylidene chloride, as well as polysulfone resins, polyethersulfone resins, polyallylsulfone resins, polyphenyl ether resins, acrylonitrile-butadiene-styrene copolymer resins ( ABS), acrylonitrile-styrene copolymer resin, polyphenylene sulfide resin, polyamide resin, polycarbonate resin, polyether ketone resin, polyether ether ketone resin alone and mixtures thereof Preferably used. Other than the resin, aluminum, stainless steel, and the like are preferable, and a composite material such as a resin-metal composite, a glass fiber reinforced resin, and a carbon fiber reinforced resin may be used. The housing and the cartridge may be made of the same material or different materials.

  In the hollow fiber membrane module of the present invention, the cartridge 5 is sandwiched between two members out of the plurality of members 2, 3, 4 constituting the housing and stored in the housing. In the embodiment, the cartridge 5 has a flange 17 portion sandwiched between the members 2 and 3 constituting the housing and flange-coupled. Specifically, the portion of the flange 17 of the cartridge 5 is sandwiched between the members 2 and 3 constituting the housing, and the band coupling 7a is provided around the member 2 and 3 so as to be joined and fixed. In this way, the cartridge 5 can be firmly fixed by flange-joining with the members constituting the housing, and the band coupling can be tightened with a thumbscrew or the like. It can be very easily detached from the members 2 and 3 constituting the housing.

  At this time, when the hollow fiber membrane module is comparatively large, it is preferable to form a recess in a portion that joins the flange 17 of the members 2 and 3 constituting the housing. In the case of a relatively large hollow fiber membrane module, it is necessary to increase the thickness of the flange 17 in order to support the weight of the cartridge only at the portion of the flange 17 of the cartridge 5. However, when the flange 17 is sandwiched between the housings, the entire thickness of the coupling portion increases, so that the band coupling cannot be attached. Therefore, as shown in FIG. 1, it is preferable to provide a recess by counterboring at a portion where the members 2 and 3 constituting the housing are joined to the flange 17 and to fit the flange 17 of the cartridge 5. In this way, even if the thickness of the flange 17 of the cartridge is increased, the overall thickness when the flange 17 of the cartridge 5 is sandwiched by the members 2 and 3 constituting the housing can be prevented. In the case of a large-sized hollow fiber membrane module, it is possible to use a band coupling that is easy to attach and detach and that is firmly joined, and the cartridge can be easily replaced. If the band coupling is attached, either the housing 2 or the housing 3 may be subjected to counterboring.

  The members 3 and 4 constituting the housing are similarly joined by the band coupling 7b. Also, the joint between the member 2 constituting the housing and the cartridge 5, the joint between the member 3 constituting the housing and the cartridge 5, and the joint between the members 3 and 4 constituting the housing are not shown. A sealing material such as an O-ring or packing is inserted.

  As described above, since the hollow fiber membrane module of the present invention is of a cartridge type, it is possible to replace only the cartridge and repeatedly use it while maintaining at least a part of the members constituting the housing at the installation location.

  And this invention can also be changed and implemented as follows, for example.

  That is, the above embodiment is an example in which the housing can be divided into three components, but in order to achieve the object of the present invention, a structure that can be divided into four or more may be used.

  As shown in FIG. 4, the joint position 16 b between the member 3 and the member 4 constituting the housing can be positioned between the stock solution supply port 10 and the concentrate discharge port 11. With this configuration, the band coupling 7b is removed, and the cartridges 5 are sandwiched and fixed by the members 2 and 3 constituting the housing, and the lowermost portion of these members reaches the joining position 16b of the members 3 and 4 while being fixed. The cartridge can be removed simply by lifting it up. Therefore, it is possible to install a cartridge type hollow fiber membrane module vertically in a building with a low ceiling, which was difficult in the past. The construction cost can be significantly reduced.

  Further, as shown in FIG. 1, when the suspension members 14a and 14b are attached to the member 2 constituting the housing, interference by the band couplings 7a and 7b can be prevented. However, as shown in FIG. When the hanger 20a, 20b is attached to the member 3 to be used, the hanger 20a, 20b is used not only for lifting the cartridge but also for supporting the hollow fiber membrane module 1 when installed vertically (for example, (Not shown). And it is also preferable to reduce the trouble of attaching by welding, and to fix the band (not shown) with the hanger 20a, 20b to an arbitrary position of the member 3 constituting the housing with a winding screw or the like.

  Furthermore, although it takes more time to attach and detach than the band coupling, if the cost of the constituent members of the hollow fiber membrane module 1 is reduced and the cost reduction of the entire hollow fiber membrane module is prioritized, the member 2 constituting the housing As shown in FIG. 6, it is also preferable to use a method of fastening the flange portion 18 with a bolt 19 as shown in FIG.

  4, 5, and 6, the member 3 constituting the housing in at least one transverse section between the stock solution supply port 10 and the concentrate discharge port 11, as will be described later, It is preferable to eliminate the gap between the outer cylinder 6 by a sealing member.

  The raw water is treated by the hollow fiber membrane module as follows.

  While the raw water supplied into the hollow fiber membrane module 1 from the raw liquid supply port 9 or the raw solution supply port 10 flows into the filtration region through the plurality of through holes 15 and is discharged from the concentrate discharge port 11, The portion permeates each hollow fiber membrane of the hollow fiber membrane bundle 8 and enters the hollow fiber. The filtered water that has entered the inside of each hollow fiber membrane is collected in the housing 2 from the end of each hollow fiber membrane and taken out from the filtrate outlet 12.

  When the filtration process for a certain period of time is completed, backwashing of the filtrate or the compressible gas from the filtrate outlet 12 to the raw water side, or only the raw water or the compressible gas mixed with the compressible gas is supplied to the raw solution supply port 9. Air scrubbing is performed to discharge the suspended matter accumulated in the module. In the latter case, the gap between the member 3 or the member 4 constituting the housing and the outer cylinder 6 is formed by the seal member 27 in at least one cross section between the stock solution supply port 10 and the concentrate discharge port 11 as described above. As a result, part of the compressed air supplied from the stock solution supply port 9 does not flow out directly from the concentrate discharge port 11 through the gap between the member constituting the housing and the outer cylinder 6, and air scrubbing is prevented. It can be done efficiently. Further, the location where the seal member 27 is installed is a member that forms a housing between the concentrate discharge port 11 and the seal member 27 so that the suspended substance discharged from the concentrate discharge port 11 becomes farther away from the concentrate discharge port 11. There is a possibility that the cartridge is accumulated and solidified in the gap between the outer cylinder 6 and it becomes difficult to attach and detach the cartridge. Therefore, the location where the seal member 27 is installed is preferably about 100 mm or less from the lower surface of the concentrate discharge port 11.

  Examples of the sealing member 27 include an O-ring and a sheet-like gasket, and the cross-sectional shape may be a circle, an ellipse, a rectangle, a triangle, or the like. Any of them can be of any type and shape as long as they achieve the object of the present invention, but an O-ring is preferable in order to achieve the object more reliably at a lower cost. Materials include ethylene propylene rubber, nitrile rubber, acrylic rubber, silicone rubber, fluorosilicone rubber, fluorine rubber, urethane rubber, chloroprene rubber, ethylene tetrafluoride resin, polyamide resin, polyethylene terephthalate resin, stainless steel, aluminum, etc. However, when the hollow fiber membrane module is used for uses such as drinking water, ethylene propylene rubber with little elution in water is preferably used.

  The raw water treatment described above is a so-called cross-flow filtration method in which raw water is circulated, but may be a total filtration method in which the raw water is filtered without being circulated.

  Next, a cartridge replacement method according to the present invention will be described with reference to FIG.

  First, the band coupling 7b joining the members 3 and 4 constituting the housing is removed. Thereafter, the members 2 and 3 constituting the housing and the cartridge 5 are extracted from the member 4 constituting the housing while the cartridge 5 is sandwiched and fixed between the members 2 and 3 constituting the housing. On the other hand, when the cartridge 5 is attached to the member 4 constituting the housing, the cartridge 5 is sandwiched and fixed by the housings 2 and 3 and inserted into the housing 4. Since the member 2 constituting the housing is provided with the hanger 14a, 14b, the cartridge etc. is extracted and inserted using the hanger 14a, 14b. On the other hand, the cartridge 5 may be attached to and detached from the members 2 and 3 constituting the housing in a state where the cartridge 5 is pulled out from the member 4 and then placed horizontally.

  In the present invention, the effect can be maximized when the hollow fiber membrane module is installed vertically. However, even when the hollow fiber membrane module is installed horizontally, the cartridge can be removed at the same time by detaching some members constituting the housing. Since it is detachable, it is preferable because the cartridge can be easily replaced.

<Example 1>
Ten hollow fiber membrane modules shown in FIG. 1 were installed, and the cartridge 5 was replaced. In extracting the cartridge 5, first, the piping of the filtrate outlet 12 was removed, and then the band coupling 16 b was removed. Subsequently, the members 2 and 3 and the cartridge 5 constituting the housing were pulled up in a chain block (not shown) using the hanging tools 14a and 14b in a state of joining them, and extracted from the member 4 constituting the housing. Since the member 4 constituting the housing is still installed, it is not necessary to remove the pipes connected to the stock solution supply port 9, the stock solution supply port 10, and the concentrate discharge port 11.

  After the cartridge 5 and the members 2 and 3 constituting the housing are extracted together, they are placed horizontally in another place, the band coupling 7a is removed, and the cartridge 5 and the members 2 and 3 constituting the housing are separated. did.

  Then, another replacement cartridge is sandwiched between the members 2 and 3 constituting the housing, and joined again by the band coupling 7a. Then, these are integrally lifted by the chain block to form the member 4 constituting the installation housing. It inserted and joined by the band coupling 16b, and the piping of the filtrate outlet 12 was finally connected.

  The above operation was performed on all ten hollow fiber membrane modules, and the cartridge replacement was completed.

  Compared to the conventional replacement work, the number of pipes to be removed is greatly reduced, and the cartridges 5 and 2 constituting the housing of the cartridge 5 can be easily attached and detached horizontally.

Furthermore, raw water was filtered using the hollow fiber membrane module shown in FIG. First, Lake Biwa as raw water is supplied at 80 L / m ² · hr with a pump and filtered for 30 minutes. Then, 100 L of filtrate is supplied from the filtrate outlet 12 to perform reverse cleaning, and 200 L of air is supplied from the raw liquid supply port 9. Air scrubbing was performed by supplying for 1 minute at / min, and then drained. Filtration water was produced | generated while repeating the process of these filtration, backwashing, air scrubbing, and drainage.

  As a result, even after about three weeks, the differential pressure between the stock solution supply port 9 and the filtrate outlet 12 did not reach 150 kPa.

<Example 2>
Ten hollow fiber membrane modules shown in FIG. 4 were installed, and the cartridge 5 was replaced. The joining position 16b of the members 3 and 4 constituting the housing was about 1 m from the floor, and the total length of the members joining the cartridge 5 and the members 2 and 3 constituting the housing was 2 m.

  In extracting the cartridge 5, first, the piping of the filtrate outlet 12 and the concentrate outlet 11 was removed, and then the band coupling 16 b was removed. Subsequently, the members 2 and 3 and the cartridge 5 constituting the housing were pulled up in a chain block using the hanging tools 14a and 14b in a state where they were joined, and extracted from the member 4 constituting the housing. At this time, the height from the floor of the joining position 16b of the members 3 and 4 constituting the housing and the total length of the members joining the cartridge 5 and the members 2 and 3 constituting the housing were as described above. They could be extracted just by lifting them to a height of about 3 m from the floor. Therefore, the ceiling height can be lowered by about 1 m as compared with the prior art.

<Example 3>
A hollow fiber membrane module similar to that in Example 1 was manufactured except that the seal member 27 was not provided, and filtered water was generated while repeating the steps of filtration, backwashing, air scrubbing, and drainage under the same conditions as in Example 1. As a result, the performance as in Example 1 was not obtained, but after starting the filtered water generation, the differential pressure between the stock solution supply port 9 and the filtrate outlet 12 did not increase rapidly and increased to 150 kPa over about 5 days. .

  The present invention can be applied not only to hollow fiber membrane modules for clean water but also to hollow fiber membrane modules for sewage and industrial water.

It is a schematic longitudinal cross-sectional view which shows an example of the hollow fiber membrane module which concerns on this invention. It is the schematic which shows the A section detail of FIG. It is the schematic which shows the BB cross section of FIG. It is a schematic longitudinal cross-sectional view which shows an example of the hollow fiber membrane module which concerns on this invention. It is a schematic longitudinal cross-sectional view which shows an example of the hollow fiber membrane module which concerns on this invention. It is a schematic longitudinal cross-sectional view which shows an example of the hollow fiber membrane module which concerns on this invention. It is a schematic longitudinal cross-sectional view which shows an example of the conventional hollow fiber membrane module.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hollow fiber membrane module 2 Member which comprises a housing 3 Member which comprises a housing 4 Member which comprises a housing 5 Cartridge 6 Inner cylinder 7a, 7b Band coupling 8 Hollow fiber membrane bundle 9 Stock solution supply port 10 Stock solution supply port 11 Concentrated liquid Discharge port 12 Filtrate outlet 13a, 13b Resin 14a, 14b Lifting tool 15 Through hole 16a, 16b Joining position 17 Head 18 Flange part 19 Bolt 20a, 20b Lifting tool 21 Hollow fiber membrane module 22 Upper member of housing 23 Lower member of housing 24 Band coupling 25 Joining position 26 Cartridge 27 Seal member

Claims (5)

A hollow fiber membrane module in which a cartridge in which a hollow fiber membrane bundle is disposed in a cylindrical case is housed in a housing composed of three or more members that can be divided in the longitudinal direction, the housing comprising the housing at a distance in the longitudinal direction of the housing, from below the original liquid supply port and concentrate exhaust outlet and a filtrate outlet and having, in this order, in the longitudinal direction between the concentrate outlet and said filtrate outlet The cartridge can be divided, and the cartridge is sandwiched between the two members between the concentrate discharge port and the filtrate outlet, and can be further divided to the stock solution supply port side from the sandwiched position. the hollow fiber membrane module characterized by having a. The housing has a stock solution supply port, a concentrate discharge port, and a filtrate solution outlet in this order at positions separated in the longitudinal direction of the housing, and at least between the stock solution supply port and the concentrate discharge port. 2. The hollow fiber membrane module according to claim 1, wherein a seal member that eliminates a gap between the housing and the cartridge is arranged in one transverse section. The hollow fiber membrane module according to claim 1 or 2, wherein a suspension is provided on at least one of the three or more members. The at least one of said two members has a recessed part in a cartridge clamping part , and the said cartridge has a flange part which fits into the said recessed part . Hollow fiber membrane module. A cartridge replacement method for a hollow fiber membrane module in which a cartridge in which a hollow fiber membrane bundle is disposed in a cylindrical case is housed in a housing composed of three or more members that can be divided in the longitudinal direction, the housing, at a distance in the longitudinal direction of the housing, between the lower and the raw liquid supply port and concentrate exhaust port and having a filtrate outlet in this order, the concentrate exhaust port and with said filtrate outlet The cartridge can be divided in the longitudinal direction, and the cartridge is divided by the two members between the concentrate discharge port and the filtrate outlet, and is divided on the side of the stock solution supply port from the sandwiched position. replacing the cartridge, characterized in that divided at possible positions, desorbed from the previous SL housing.

Images