JP2000157845A - Hollow fiber membrane cartridge and its fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily suspend and fix a large dimension hollow fiber membrane cartridge in a housing by fixing a cartridge head formed of a material different from that of a bonding section on one bonded end outer periphery of a hollow fiber membrane bundle and forming a collar protruded to the outside in the diameter direction on the cartridge head. SOLUTION: A hollow fiber membrane cartridge 12 is formed of a number of hollow fiber membranes 11, bonding agent layers 14 and 17, a cartridge head 13 and a skirt member 16. The upper ends of the hollow fiber membranes 11 are opened and their lower ends are closed, and the outer peripheries of the upper ends of a number of hollow fiber membranes 11 are bundled together and their upper end outer peripheries are bonded integrally by a bonding agent to form the bonding agent layer 14, and the bonding agent layer 14 is inserted into the cylindrical cartridge head 13 and fixed on the cartridge head 13. A collar 13a protruded to the outside in the diameter direction is formed on the end face side of a hollow fiber membrane bundle on the cartridge head 13 and the hollow fiber membrane cartridge 12 is suspended and supported on a filter device by the collar 13a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a hollow fiber membrane cartridge provided in a filtration device. For more information,
The present invention relates to a hollow fiber membrane cartridge used for a filtration device that performs a large amount of turbidity and sterilization using river water, lake water, groundwater, seawater, domestic wastewater, factory wastewater, or the like as raw water.

[0002] The present invention further relates to a structure for fixing a hollow fiber membrane cartridge to a filtration device.

[0003]

2. Description of the Related Art As shown in FIG. 2 (enlarged view of a main part), a conventional small hollow fiber membrane cartridge is fixed in a housing by a brim portion of a cartridge head 13 formed at an end of a hollow fiber membrane 11. As shown in FIG. 13a is sandwiched between the housing head 2b and the cap 6, and further tightened by the band coupling 21. On the housing fixed side of the hollow fiber membrane cartridge 12 used here, a cartridge head 13 is integrally formed with an adhesive for bonding the ends of the multiple hollow fiber membranes 11 to each other. Is provided with a brim portion 13a made of the same material.

However, the above fixing method is applicable to a hollow fiber membrane cartridge having a thin collar at the upper end of the cartridge head, but is relatively applicable to water treatment for purifying a large amount, which is a subject of the present invention. In the case of a large-sized hollow fiber membrane cartridge, the collar portion at the upper end of the cartridge head has to be thickened, so that this method cannot be applied.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure for suspending and fixing a relatively large-sized hollow fiber membrane cartridge in a housing, and not to provide a structure of a hollow fiber membrane cartridge suitable therefor. It is assumed that.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems. That is, the present invention provides (1) a hollow fiber membrane cartridge which is suspended and supported in a housing of a filtration device and is formed by bundling a plurality of hollow fiber membranes. A hollow fiber membrane cartridge, wherein a cartridge head made of a different material from the adhesive portion is fixed, and the cartridge head is provided with a flange portion projecting outward in the radial direction. 2) A fixed structure for suspending and supporting the hollow fiber membrane cartridge in the housing of the filtration device, wherein the collar portion of the cartridge head at the upper end of the hollow fiber membrane cartridge is engaged with the housing head of the filtration device, and the collar portion thereof And a fixing structure which is sandwiched between the housing head and a screw-in cap fitted to a male screw formed on the outer periphery of the housing head.

[0007] The hollow fiber membrane cartridge of the present invention is used by being suspended and fixed in a tank-type filtration device or a rack-type filtration device for declaring and sterilizing a large amount of raw water. Further, the fixing structure of the present invention is preferably used when fixing a hollow fiber membrane cartridge in a rack-type filtration device.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of a hollow fiber membrane cartridge according to the present invention and a structure for fixing the same in a housing will be described with reference to the drawings. FIG. 1 is a sectional explanatory view showing an example of a hollow fiber membrane cartridge according to the present invention suspended and supported in a housing of a rack-type filtration device.

The hollow fiber membrane cartridge 12 of the present invention shown in FIG. 1 has a large number of hollow fiber membranes 11, adhesive layers 14 and 17, a cartridge head 13, and a skirt member 1.
6 is comprised. The hollow fiber membrane 11 has an upper end opened and a lower end closed, and a number of hollow fiber membranes 11 are bundled and their outer peripheries are integrally joined by an adhesive to form the adhesive layer 14. The adhesive layer 14 is inserted into the cartridge head 13 having a cylindrical shape, and is fixed to the cartridge head 13 with an adhesive.

The cartridge head 13 is provided with a flange 13a protruding radially outward on the end face side of the hollow fiber membrane bundle. Since the hollow fiber membrane cartridge of the present invention is suspended and supported by the filtering device at the brim portion 13a of the cartridge head, the brim portion must be thick enough to withstand the weight of the cartridge and the internal pressure (water pressure). It is composed of those with excellent strength.

At the other end of the hollow fiber membrane 11, the hollow fiber membranes are integrally joined by an adhesive,
6, an adhesive layer 17 is integrally formed, but the end of the hollow fiber membrane 11 is sealed. The adhesive layer 17 has a plurality of through-holes 17a for introducing raw water and a gas for cleaning into the inside of the hollow fiber membrane bundle so as to effectively contact the outer peripheral surface of the hollow fiber membrane. The skirt member 16 protrudes from the end face of the hollow fiber membrane bundle and is fixed to the adhesive layer.

As shown in FIG. 1, the outer circumference of the bundle of hollow fiber membranes 11 between the cartridge head 13 and the skirt member 16 does not have an outer cylinder case as conventionally provided. It is exposed barely over almost the entire length. As the hollow fiber membrane 11 used in the present invention, a microfiltration membrane, an ultrafiltration membrane, a reverse osmosis membrane, or the like can be used. The material of the hollow fiber membrane 11 used in the present invention is as follows.
Not particularly limited, polysulfone, polyethersulfone, polyimide, polyetherimide, polyamide, polyetherketone, polyetheretherketone, polyethylene, polypropylene, poly-4-methylpentene,
Cellulose, cellulose acetate, polyvinylidene fluoride,
Polyethylene-tetrafluoroethylene copolymer, polytetrafluoroethylene and the like can be mentioned. Alternatively, these composite material films can be used. Further, as the shape of the hollow membrane fiber, a membrane having an inner diameter of 50 μm to 3000 μm and an inner / outer diameter ratio in a range of 0.3 to 0.8 can be used.

As the adhesive used in the present invention, epoxy resin, urethane resin, epoxy acrylate resin,
A polymer material such as a urethane resin can be used.
When it is desired to improve the curing shrinkage and strength of the adhesive, the adhesive may contain a fibrous material such as glass fiber or carbon fiber, or a fine powder such as carbon black, alumina or silica.

The cartridge head 13 of the present invention is not particularly limited as long as it is made of a material different from the above-mentioned adhesive, but a thermoplastic resin or stainless steel is preferably used. The material of the skirt 16 may be the same as or different from that of the cartridge head 13, but is preferably a thermoplastic resin or stainless steel. The method for producing the hollow fiber membrane cartridge of the present invention comprises:
The hollow fiber membrane bundle whose one end hollow portion is sealed is inserted into the cartridge head 13, and an adhesive is poured into the hollow fiber membrane bundle to fix the hollow fiber membranes together and the cartridge head 13 in a liquid-tight manner. And the adhesive layer are simultaneously cut to open the end face of the hollow fiber membrane. The other end of the hollow fiber membrane is inserted into the skirt member 16 without obstructing the hollow portion, and a predetermined rod or plate for forming a through hole 17a in the hollow fiber membrane bundle is set. . Then, an adhesive is poured into the skirt member 16 to form the hollow fiber membranes and the skirt member 1.
6 is adhesively fixed. At this time, the hollow part at the end of the hollow fiber membrane is
At the same time, it is sealed with an adhesive. Then, the through hole 17a
The forming rod or plate is taken out of the adhesive layer to form a through hole 17a. Also, a through hole 17 is provided in the hollow fiber membrane bundle.
The skirt member 16 may be bonded to the outer periphery of the bonding and fixing layer, or fixed by welding, after setting and bonding and fixing a stick or plate for forming the through hole 17a. good.

Next, a structure in which the hollow fiber membrane cartridge 12 according to the present invention is fixed in the housing 2 will be described.
In FIG. 1, reference numeral 1 denotes an example of a rack-type filtration device for supplying and filtering an undiluted solution, and is applicable to, for example, water treatment for purifying a large amount of domestic wastewater, river water, lake water, groundwater or seawater as raw water. is there.

FIG. 1 illustrates a case where the hollow fiber membrane cartridge according to the present invention is applied to a so-called cross-flow filtration type rack-type filtration device for circulating a stock solution.
It is also possible to apply to a so-called all-filtration type rack-type filtration device that performs filtration without circulating the undiluted solution. The housing part of the rack-type filtration device 1 includes a housing body 2, upper and lower screw-in caps 5 and 9, and upper and lower caps 3 and 6. Further, the housing body 2 includes a pipe 2a and upper and lower housing heads 2b and 2f, and the pipe and the upper and lower housing heads are air-tightly and liquid-tightly fixed by welding or bonding, respectively.

FIG. 1 shows a preferred embodiment,
Although the upper screw-in cap 9 and the upper cap 6 and the lower screw-in cap 5 and the lower cap 3 are respectively shown as being divided, another embodiment in which the screw-in cap and the cap are integrated is also applicable. It is also possible. The upper and lower caps 3 and 6 of the rack-type filtration device 1 are arranged at the upper and lower portions and connected to and supported by piping (not shown). Further, the housing main body 2 is erected by fixed support means with a band (not shown) as necessary. I have.

With the O-ring 4 sandwiched between the lower housing head 2f and the lower cap 3, the male screw 2g provided on the lower housing head 2f and the female screw 5a provided on the lower screw cap 5 are fitted. By
The lower housing head 2f and the lower cap 3 are air-tightly and liquid-tightly fixed. Further, in a state in which the packing 7 is sandwiched between the upper housing head 2b and the lower surface of the brim portion 13a of the cartridge head 13, and in a state in which the O-ring 8 is sandwiched between the upper cap 6 and the upper surface of the cartridge head 13, Male screw 2c provided on upper housing head 2b and female screw 9a provided on upper screw-in cap 9
Are fitted in an airtight and liquid-tight manner between the upper housing head 2b and the cartridge head 13 and between the upper cap 6 and the cartridge head 13.

With the fixing structure described above, the rack-type filtration device 1
A hollow fiber membrane cartridge 12 in which a plurality of hollow fiber membranes 11 are bundled is suspended and supported in the housing 2. The internal space of the rack-type filtration device 1 includes a hollow fiber membrane cartridge 12
Is divided into two chambers. As a result, a supply water chamber 18 is formed by the space formed by the housing body 2 and the cartridge head 13, and a treated water chamber 19 is formed by the space formed by the cartridge head 13 and the upper cap 6.

The upper housing head 2b is provided with a horizontal nozzle 2d in a substantially perpendicular direction, and an outlet thereof serves as a circulating water port 2e for performing filtration while circulating the undiluted solution. In order to prevent the hollow fiber membrane 11 from being drawn in by the circulating water, the plate 1
0 is attached. A pipe 2a used in the present invention,
Housing heads 2b, 2f, screwed caps 5,
9, the materials of the caps 3 and 6 are not particularly limited, and may be the same or different, and a thermoplastic resin or stainless steel can be preferably applied.

In the above configuration, during the filtration operation by the rack-type filtration device 1, the raw water supplied from the raw water inlet 3a of the lower cap 3 below the rack-type filtration device 1 to the supply water chamber 18 by a pump (not shown) is supplied to the supply water chamber. 18 and is guided from the skirt member 16 to the outer peripheral side surface of the hollow fiber membrane 11 through the through hole 17 a of the adhesive layer 17. After a part thereof passes through the outer peripheral portion of the hollow fiber membrane 3 as it is and passes through the perforated plate 10 provided on the inner surface of the upper housing head 2b,
It is guided to a circulating water port 2e from a horizontal nozzle 2d provided in the upper housing head 2b.

The raw water in the vicinity of the outer periphery of the hollow fiber membrane 11 is pressurized from the outside to the inside of the hollow fiber membrane 11, filtered, and guided to the treated water chamber 19 from the open upper end of the hollow fiber membrane 11. I will The filtered water stored in the treated water chamber 19 is taken out of the rack-type filtration device 1 from the treated water port 6a on the upper cap 6. In the case where the hollow fiber membrane 11 is backwashed by filtration, the filtrate is supplied from the treated water inlet 6a and backflows to the supply water chamber 18 to remove suspended substances (non-permeate) accumulated on the outer wall of the hollow fiber membrane 11. Then, the water is discharged to the outside of the rack-type filtration device 1 from the raw water port 3a and the circulating water port 2e provided at the lower part of the rack-type filtration device 1.

The structure for fixing the hollow fiber membrane cartridge 12 in the housing 2 according to the present invention will be described in more detail. A male screw 2c is formed on the outer periphery of the upper housing head 2b. Since the outer diameter of the brim portion 13a of the cartridge head 13 of the hollow fiber membrane cartridge 12, the outer diameter of the upper cap 6, and the outer diameter of the upper housing head 2b are substantially the same, the upper cap 6 and the cartridge head 13 Can be fitted with the male screw 2c of the upper housing head 2b and the female screw 9a of the upper screw-in cap 9 with the. Further, the lower surface of the flange 13a of the cartridge head 13 and the upper housing head 2b
The upper surface, the lower surface of the cap 6 and the upper surface of the cartridge head 13 are finished in parallel.

By inserting the hollow fiber membrane cartridge 12 into the housing, the brim portion 13a of the cartridge head of the hollow fiber membrane cartridge 12 is locked to the housing head. Further, by fitting the male screw 2c of the upper housing head 2b and the female screw 9a of the upper screw cap 9 via the packing 7 and the O-ring 8, the space between the upper housing head 2b and the cartridge head 13 and between the upper cap 6 and the cartridge The space between the heads 13 can be fixed air-tightly and liquid-tightly.

In the above embodiment, the packing 7 and the O-ring 8 can be selectively used as appropriate. An O-ring is provided between the upper housing head 2b and the cartridge head 13, and an O-ring is provided between the upper cap 6 and the cartridge head 13. It is also possible to apply a packing to the. In the case of a hollow fiber membrane cartridge having a relatively large size applicable to water treatment or the like for purifying a large amount of water, which is an object of the present invention, the hollow fiber membrane cartridge
Of the upper surface of the hollow fiber membrane cartridge 12 due to the internal pressure (water pressure) applied inside the treated water chamber 19 increases. In addition, as the size of the hollow fiber membrane cartridge 12 increases, the weight of the hollow fiber membrane cartridge 12 increases, and the load applied to the upper surface of the hollow fiber membrane cartridge 12 increases. Similarly, when the internal pressure is higher than normal, the load applied to the upper surface of the hollow fiber membrane cartridge 12 is large. The above load is applied to the cartridge head 1
3 mainly acts as a shear stress on the brim portion 13a.
To increase the load capacity of the cartridge head,
It is necessary to increase a.

According to the above structure of the present invention, the female screw 9a of the screw-in cap 9 is lengthened, so that the flange 13
a thick cartridge head 13 can be fitted.
This is a fixing structure applicable to the hollow fiber membrane cartridge 12 having a large size and a large thickness 3a. In the case of a small cartridge having a thickness of about 3 inches or less, the thickness of the collar 13a is 5 mm.
Since it is sufficient that the degree is not more than the degree, the tightening by the band coupling as shown in FIG. 2 is possible. In contrast,
In the case of a relatively large-sized hollow fiber membrane cartridge applicable to water treatment or the like which purifies a large amount, which is an object of the present invention, the brim portion 13a of the cartridge head 13 becomes thick, so the fixing structure of FIG. Can not do.

[0027]

Since the present invention has the above-described configuration and operation, it can be applied to a relatively large-sized hollow fiber membrane cartridge applicable to water treatment or the like for purifying a large amount. Further, the fixing structure of the present invention can be preferably applied to fixing the hollow fiber membrane cartridge 12 in the housing 2 in which the collar portion 13a at the upper end of the cartridge head 13 is relatively thick.

When the suspended matter is excessively accumulated in the hollow fiber membrane 11 and the predetermined filtration performance cannot be maintained, according to the fixing structure of the present invention, the hollow fiber membrane cartridge can be easily replaced from the housing. be able to.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing an example of a hollow fiber membrane cartridge according to the present invention suspended and supported in a housing of a rack-type filtration device.

FIG. 2 is an enlarged view of a main part showing a structure for fixing a conventional small hollow fiber membrane cartridge in a housing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rack type filtration device 2 ... Housing body 2a ... Pipe 2b ... Upper housing head 2c ... Male screw 2d ... Horizontal nozzle 2e ... Circulating water port 2f ... Lower housing head 2g ... male screw 3 ... lower cap 3a ... raw water outlet 4 ... O-ring 5 ... lower screwed cap 5a ... female screw 6 ... upper cap 6a ... treated water outlet 7 ... · Packing 8 ··· O-ring 9 ··· Upper screw-in cap 9a ··· Female screw 10 ··· Punch plate 11 ··· Hollow fiber membrane 12 ··· Hollow fiber membrane cartridge 13 ··· Cartridge head 13a ··· · Collar portion 14 ··· Adhesive layer 15 ··· Detachable nut 16 ··· Skirt member 17 ··· Adhesive layer 17a ··· Through hole 18 ··· Supply water chamber 19 ··· Water chamber 21 ... band coupling

Continued on front page F-term (reference) 4D006 GA03 GA06 GA07 HA03 HA19 HA91 HA95 JA08A JA16A JA27A JA30A JA57Z JB06 KA46 KC03 KC13 MA01 MB02 MC11 MC18 MC22 MC23 MC29 MC30 MC45 MC47 MC54 MC58 MC59 MC62 PA02 PB03 PB04 PB08

Claims (2)

[Claims] 1. A hollow fiber membrane cartridge comprising a plurality of hollow fiber membranes bundled and suspended and supported in a housing of a filtration device, wherein the cartridge has a hollow fiber membrane bundle with one adhesive end outer periphery.
A hollow fiber membrane cartridge, wherein a cartridge head made of a different material is fixed to the adhesive portion, and the cartridge head is provided with a flange portion projecting radially outward. 2. A fixed structure for suspending and supporting a hollow fiber membrane cartridge in a housing of a filtration device, wherein a collar portion of a cartridge head at an upper end of the hollow fiber membrane cartridge is locked to a housing head of the filtration device, and A fixing structure in which the collar portion is sandwiched between a housing cap and a screw cap that fits into a male screw formed on the outer periphery of the housing head.