KR20090104152A - A Hollow Fiber Membrane Module of Serial Pressure Type Built in External Pressure Vessel - Google Patents

Abstract

PURPOSE: A membrane module built in a pressure container and a hollow fiber membrane module of a series type are provided to maximize process efficiency of raw water by increasing integrated degrees of the module, and to improve space utility. CONSTITUTION: A hollow fiber membrane module(20) built in a pressure container for water treatment comprises a collecting water pipe(15), a hollow fiber membrane(16), and a catchment cap(17). The collecting water pipe is located on the center part of a potting part(19). The collecting water pipe is a path for moving the processed water. The collecting water pipe supports a hollow fiber membrane. The hollow fiber membrane is fixed on both ends of the potting part by an adhesive. The hollow fiber membrane is fixed on an outer side the collecting water pipe to process water. The catchment cap is fastened with the potting part. The catchment cap transfers the processed water to the collecting water pipe through the hollow fiber membrane.

Description

A Hollow Fiber Membrane Module of Serial Pressure Type Built in External Pressure Vessel}

The present invention forms an external vessel with a pressure vessel having a raw water inlet, a treated water outlet, and a concentrated water outlet through which the raw water is injected to obtain treated water by injecting raw water at a high pressure to obtain a treated water. In the center of the membrane module, the treated water can move, and the collecting pipe supporting the hollow fiber membrane is located at the center of the potting part, and the hollow fiber membrane is fixed with adhesive to the potting parts on the left and right sides at a predetermined radius around the outer circumference of the collecting pipe. The injected raw water is processed through the hollow fiber membrane of the membrane module to be collected into the left and right potting parts, and a collecting cap for collecting the treated water collected from each hollow fiber membrane is attached to the potting parts on the left and right sides to form a single hollow fiber membrane. The module is manufactured, and the manufactured hollow fiber membrane module is used to move the treated water formed in the center of the collecting cap. The present invention relates to a pressure vessel built-in membrane module and a tandem type hollow fiber membrane module designed to easily increase the processing capacity by fastening and combining a plurality of water discharge outlets in series with each other.

Conventional pressurized hollow fiber membrane module is used to purify fine particles in sewage and sewage cleanly, and the raw water is passed through the hollow fiber membrane under pressure. Although there is an advantage, each module should be installed upright, so it takes up a lot of installation space, is difficult to maintain and repair, and because the hollow fiber membrane is covered with synthetic resin-based housing, it is not easy to clean the contaminated hollow fiber membrane, and thus the durability is good. There is a problem.

Conventional pressurized hollow fiber membrane module injects fine air droplets to prevent contamination of the hollow fiber membrane, but when the inside of the module is contaminated, the treatment efficiency is difficult to maintain and difficult to clean, and maintains by frequent replacement There is a problem that the maintenance cost increases.

In addition, in order to increase the processing capacity, the conventional pressurized hollow fiber membrane module has to install each module in parallel and pressurize them in parallel to each other and collect the treated water, thus occupying a lot of installation space and having low space utilization, and the installation is complicated. It takes a lot of costs, there is a problem that the maintenance cost is increased because the maintenance is not easy.

The problem to be solved by the present invention is to increase the space utilization by reducing the installation space by designing and manufacturing to install horizontally.

Another problem to be solved by the present invention is to maximize the treatment efficiency of the raw water by increasing the degree of contact by designing and manufacturing to process the raw water by connecting a plurality of hollow fiber membrane modules in series in one outer vessel.

Another problem to be solved by the present invention can be easily washed by injecting backwash water or air through the collecting pipe when the hollow fiber membrane is contaminated, if necessary, the hollow fiber membrane module connected in series in the outer vessel It is to be taken out, cleaned and used again.

Another problem to be solved by the present invention is to simply fasten and combine the treated water outlet formed in the center of the plurality of hollow fiber membrane module with a fastening pipe to increase the degree of integration, by placing them horizontally to connect a plurality of parallel connection It is designed to increase the processing capacity to increase the utilization of space and to facilitate maintenance.

The solution of the present invention is to inject the external vessel into a pressure vessel having a raw water inlet, a treated water outlet and a concentrated water outlet through which the raw water is injected to obtain the treated water by injecting the raw water at a high pressure to pass through the hollow fiber membrane. A water collecting pipe for forming and moving the collected water and supporting the hollow fiber membrane is positioned at the center of the potting portion, and the hollow fiber membrane is fixed to the potting portion on the left and right sides with a constant radius of the outer circumference of the water collecting tube, and injected at a high pressure. Raw water is collected through the hollow fiber membranes and collected to the left and right potting portions to which the hollow fiber membranes are attached. A collecting cap for collecting the treated water collected from each hollow fiber membrane is attached to the potting portions on the left and right sides so that one hollow fiber membrane is attached. The module is fabricated, and the treated water flow path where the treated water moves between the hollow fiber membrane module and the module is the center of the collecting cap. The pressure vessel built-in module and the series-type pressurized hollow fiber membrane module are designed to easily increase the processing capacity by connecting a plurality of formed water flow paths to each other in series. .

Another solution of the present invention is a horizontal hollow fiber membrane installed in one place by gravity to prevent water treatment efficiency is reduced, serves to distribute the hollow fiber membrane uniformly, the screen baffle free movement of raw water Is to implement a hollow fiber membrane module that is fixed to the collection pipe at regular intervals.

In another aspect of the present invention, a plurality of protrusions are formed to secure a space for collecting treated water in an inside of a collecting cap that is attached to and fixed to an outside of the potting part and collects treated water, and between the plurality of formed protrusions. The hollow fiber membrane module has a gap formed between the protrusions to form a space in which the treated water moves to the treated water outlet and the collecting pipe formed in the collecting cap.

Another solution of the present invention is to form a three or more protrusions at a predetermined interval on the outside of the collecting cap to move the raw water freely between the outer vessel and the collecting cap to pass through the hollow fiber membrane to process the raw water To implement the membrane module.

Another solution of the present invention is designed and manufactured so that the outer vessel and the hollow fiber membrane module is easily separated, when the hollow fiber membrane is contaminated, a plurality of hollow fiber membrane modules connected in series inside the outer vessel are taken out, washed and reused. It is to implement a hollow fiber membrane module that can be easily washed contaminated hollow fiber membranes by injecting backwash water, chemical wash water or air through the collecting pipe to discharge to the concentrated water outlet.

Another solution of the present invention is to connect a plurality of hollow fiber membrane modules in series inside one of the outer vessel can easily increase the processing capacity, the plurality of outer vessels in parallel treated water outlet and concentrated water Since the outlets are installed horizontally by fastening with fastening pipes and pipes, the raw water treatment device is improved to improve space utilization.

The present invention is designed and manufactured to be installed horizontally to reduce the installation space has the effect of increasing the space utilization.

Another effect of the present invention is to maximize the treatment efficiency of the raw water by increasing the degree of contact by designing and manufacturing to process the raw water by connecting a plurality of hollow fiber membrane modules in series in one outer vessel.

Another effect of the present invention can be easily washed by injecting backwash water or air through the collecting pipe when the hollow fiber membrane is contaminated, take out the hollow fiber membrane module connected in series in the outer vessel when necessary It is intended to be washed and reused.

Another effect of the present invention is to simply combine the treatment water outlet formed in the center of the plurality of hollow fiber membrane module by fastening and coupling in series with a fastening pipe to increase the degree of integration, by placing them horizontally to connect a plurality of parallel connection space To increase the utilization and ease of maintenance.

It looks at the specific content for the practice of the present invention. The present invention Raw water, such as sewage or sewage, is injected into the outer vessel at high pressure, and the raw water inlet for injecting raw water and the concentrated water outlet for discharging the concentrated water are provided to pass the hollow fiber membrane to obtain treated water. The outlet is fixedly installed to form an external vessel.

The outer vessel of the pressure vessel built-in membrane module and the tandem type hollow fiber membrane module designed and manufactured according to the present invention can be applied to a conventional RO (reverse osmosis) vessel as it is, and withstand the pressure of injecting raw water. It can be designed and manufactured as a conventional container having excellent durability and a durable container capable of withstanding pressure in the required size and shape.

The pressure vessel built-in membrane module and the tandem hollow fiber membrane module designed and manufactured according to the present invention can be used for conventional water treatment such as sewage, sewage, purified water and wastewater.

The hollow fiber membrane module is a passage through which the treated water from the hollow fiber membrane moves, and a collecting pipe supporting the hollow fiber membrane is located at the center of the potting part, and the collection pipe has a plurality of screen baffles at regular intervals. The hollow fiber membrane is inserted into the fastening groove formed in the shaft to prevent the hollow fiber membrane from being easily contaminated and damaged by gravity, and is fixedly installed to uniformly distribute the hollow fiber membrane in order to increase the efficiency of processing raw water. In addition, the screen baffle is manufactured in the shape of a screen or a net so that enemies can move freely between the screen baffles.

Between the screen baffles, a hollow fiber membrane having a certain length is uniformly aligned to the left and right sides and fixed to the jig, and the adhesive is hardened by attaching and molding with an adhesive (epoxy, polyurethane, etc.) to the left and right sides of the hollow fiber membrane fixed to the jig. After cutting one side of the cut part with a cutter, the potting part and the collecting cap of the left and right sides to which the hollow fiber membrane is fixed are attached and fixed so that raw water does not flow from the outside with epoxy adhesive, so that the production of one hollow fiber membrane module is completed. Raw water injected at high pressure is processed through the hollow fiber membrane, and the treated water collected through the hollow fiber membrane gathered at the left and right potting parts is configured to move to the collection pipe and the treated water outlet through a space formed in the collecting cap.

Look at the drawings in accordance with the present invention. Figure 1 shows a pressure vessel built-in in-line pressurized hollow fiber membrane module produced by connecting two hollow fiber membrane modules designed and manufactured in accordance with the present invention, Figure 2 is a bone to be inserted into the outer vessel It shows a hollow fiber membrane module designed and manufactured according to the invention. Figure 3 shows one embodiment of the shape of the screen baffle fixed to the water collecting pipe, Figure 4 shows a cross-sectional view of the module designed and manufactured according to the present invention and the shape of the flexible baffle.

In addition, the present invention by simply fastening and coupling the treated water outlet formed in the center of the plurality of hollow fiber membrane module in series with a fastening pipe to increase the degree of integration of the hollow fiber membrane module, by placing them horizontally to use a plurality of pipes By connecting and connecting in parallel to increase the utilization of the space, and to implement the raw water treatment device for easy maintenance. Look at the embodiment according to the present invention.

EXAMPLES

Example 1

It looks at a specific embodiment according to the present invention. In the external vessel of the present invention, raw water, such as sewage or sewage, is injected into the outer vessel at a high pressure, and the raw water inlet 12 through which the raw water is injected to obtain the treated water through the hollow fiber membrane and the concentrated water outlet 13 through which the concentrated water is discharged. ) Is fixed and a treatment water outlet 14 through which treatment water is discharged is fixed.

The hollow fiber membrane modules 20 and 21 serve as a passageway through which the treated water passing through the hollow fiber membrane 16 moves, and a collecting pipe 15 supporting the hollow fiber membrane is located at the center of the potting unit 19. In the water pipe 15, a plurality of screen baffles 31 are inserted into the fastening grooves 36 and 37 formed in the water collecting pipe 15 at regular intervals.

The installed screen baffles 31 are hollow fiber membranes 16 are gathered in one place by gravity, so that the hollow fiber membranes 16 are easily contaminated and damaged, and the hollow fiber membranes 16 are used to increase the efficiency of processing raw water. It serves to distribute uniformly around the collecting pipe 15, the screen baffle 31 is made of a screen or mesh shape 33 so that the raw water can move freely between the screen baffle 31.

The screen baffle 31 is made of synthetic resin, the shape fixed to the collection pipe 15 can be formed in a structure as shown in Figure 3 or can be fixed fixed by a variety of conventional fastening method, form a long overall or material cost It can be configured to be partly interlocked in the middle for the sake of saving, and the number of screen baffles 31 is preferably set to about 4 to 16.

Looking at the configuration and manufacturing method of the hollow fiber membrane module (20, 21) located in the interior of the outer vessel according to the first embodiment of the present invention, a predetermined interval in the water collecting pipe 15 having a length of about 1.5m The screen baffle 31 is inserted into and fixed to the plurality of fastening grooves 36 and 37 formed in the form, and the hollow fiber membrane 16 having a predetermined length is fixed between the screen baffles 31 inserted and fixed to the collection pipe 15. Evenly distributed, evenly aligned, put in a jig and fixed, and then molded by an adhesive (epoxy, polyurethane, etc.) on the left and right sides to cure.

After fixing to the jig and molding hardening with an adhesive, when potting work, the potting work is carried out by fixing the flexible screen (35, flexible screen) installed outside to the jig and molding and curing together with the adhesive on the left and right sides. After fixing the screen baffle and the hollow fiber membrane to the jig, and molding and curing with adhesive on the left and right sides, fixing and fixing the flexible screen (35, flexible screen) with an adhesive on the outside, and then fixing one side of the left and right adhesive parts It can be produced by cutting.

The flexible screen 35 prevents the hollow fiber membrane from sagging down by gravity and protects the hollow fiber membrane by wrapping the outside of the hollow fiber membrane, and serves to facilitate insertion into the vessel after fastening a plurality of modules together. do.

The flexible screen 35 is made of a synthetic resin material, and is designed and manufactured in a screen or mesh shape free of movement of raw water.

The potting portion 19 hardened by bonding the epoxy fiber to the left and right sides of the hollow fiber membrane 16 and the flexible screen 35 roundly formed around the water collecting pipe 15 is collected to the left and right sides of the hollow fiber membrane 16. It is configured to attach and fasten with the catching cap 17 having a space capable of gathering the treated water to be collected and moved to the collecting pipe 15 and the treated water moving path 24.

The collecting cap 17 is a potting portion 19 in which the collecting pipe 15, the hollow fiber membrane 16, the screen baffle 31, and the flexible screen 35 are molded and cured with an adhesive, and then cut off the molded part. And water can be attached and bonded by adhesive or fastened by various means to prevent the inflow of raw water between the collecting caps 17, and the treated water collected through the hollow fiber membrane by the pressure inside the collecting caps 17 is collected in the collecting pipe. A predetermined space is formed between the potting unit 19 and the collecting cap 17 so as to move to (15) so that the treated water can be moved to the collecting pipe 15 and / or the treatment water moving path 24 at regular intervals. The above-described protrusions 23 are rounded, and a gap 25 is formed between the protrusions 23 and the protrusions 23 for moving the treated water, or may be formed of a plurality of protrusions in an appropriate length and shape.

The potting part 19 and the collecting cap 17 are attached to each other with an epoxy adhesive to be fastened to manufacture the pressurized hollow fiber membrane modules 20 and 21 installed inside the outer vessel 11 according to the present invention. .

At the center or one side of the collecting cap 17, the treated water moving passage 24 or the treated water outlet having a hole having a diameter of a suitable size can be discharged to the outside or connected to another hollow fiber membrane module. (14) is formed, and the hollow fiber membrane module (20, 21) on the outer side of the collecting cap is maintained at a predetermined distance between the inner wall of the vessel and the collecting cap when the hollow fiber membrane module (20, 21) is inserted into the outer vessel 11 to free the raw water A plurality of protrusions 22 are formed at regular intervals to move.

The treatment water moving path 24 forms a hole having a diameter of a certain size in the center of the collecting cap 17 to fasten the pipe to fit the hole size so that the treatment water can be moved or at the center of the collecting cap 17. It is also possible to form a pipe protruding with a diameter of a predetermined size to be fastened to each other by inserting the fastening pipes in accordance with the outer diameter of the protruding pipe. 1 (a) and 1 (b) show an example of a fastening structure, and is configured in a shape sealed with an O-ring 26 to prevent raw water from flowing into the treated water at the fastening portion of the pipe. .

Example 2

Example 2 according to the present invention relates to a pressure vessel built-in series pressurized hollow fiber membrane module produced by connecting a plurality of hollow fiber membrane modules manufactured in series.

The hollow fiber membrane modules 20 and 21 manufactured above are designed and manufactured to increase the processing capacity by connecting the collection cap 17 and the collection cap 17 in series as pipes, as shown in FIG. Connecting two hollow fiber membrane modules with diameters of about 1.5m in length in series creates a pressure vessel built-in pressurized hollow fiber membrane module with a total length of 3m and connects four in series. In case of manufacture, the pressure vessel built-in type pressurized hollow fiber membrane module having a length of about 6m is completed.

Position the plurality of in-line pressurized hollow fiber membrane modules horizontally in the outer vessel 11 having the diameter of 20 cm and the length of 3m and 6m, and connect the treated water outlet and the concentrated water outlet in parallel with pipes. It can expand the processing capacity, and can be connected in parallel but fixedly installed horizontally, which reduces installation space and facilitates the installation and maintenance work, greatly reducing installation and maintenance costs.

The outer vessel of the pressure vessel built-in membrane module and the tandem type hollow fiber membrane module designed and manufactured according to the present invention can be applied to a conventional RO (reverse osmosis) vessel as it is, and withstand the pressure of injecting raw water. It can be designed and manufactured as a conventional container having excellent durability and a durable container capable of withstanding pressure in the required size and shape.

That is, the diameter and length of the outer vessel, the hollow fiber membrane module and the pressure vessel built-in pressurized hollow fiber membrane module according to the present invention can be variously designed and manufactured according to the capacity for treating raw water, the size and shape of the facility. have.

Pressure vessel built-in pressurized hollow fiber membrane module designed and manufactured according to the present invention, when the membrane pollution occurs, the treatment efficiency is reduced, by selecting one of the backwash water, air, and chemical wash water into the collecting pipe, the concentrated water outlet Contaminated hollow fiber membranes can be washed to discharge, and more fundamentally, the hollow fiber membrane module can be removed from the outer vessel, separated, washed and used again.

The hollow fiber membrane according to the present invention may be configured by applying one of MF (microfiltration), UF (ultra filtration), NF (nanofiltration) and RO (revers osmosis) membranes, and the hollow fiber PSf (polysulfone) , Hollow fiber membranes made of conventional polymer materials such as polyethylene (PE), polyvinylidene fluoride (PVDF), and teflon (PTEF).

The present invention includes a raw water inlet, a treated water outlet and a concentrated water outlet through which the raw water is injected to obtain treated water by injecting raw water at a high pressure to obtain treated water, and the treated water is disposed at the center of the hollow fiber membrane module. The collecting pipe supporting the hollow fiber membrane is located at the center of the potting part, and the hollow fiber membrane is fixed to the potting part on the left and right sides with a fixed radius around the outer circumference of the collecting pipe, and the raw water injected at high pressure is the hollow fiber membrane of the module. Collected through the left and right potting part, and a collecting cap for collecting the treated water collected from each hollow fiber membrane is attached to the left and right potting part to manufacture one hollow fiber membrane module, and the manufactured hollow fiber membrane The module connects the holes through which the treated water formed in the center of the collecting cap moves to each other, and tightens a plurality in series. In combination with the present invention, it is possible to provide an in-line pressurized hollow fiber membrane module designed to easily increase the processing capacity.

1: Built-in pressure vessel built-in pressurized hollow fiber membrane module manufactured by connecting two hollow fiber membrane modules designed and manufactured according to the present invention in series

Figure 2: Hollow fiber membrane module designed and manufactured according to the present invention to be inserted into the outer vessel

Figure 3: The shape of the screen baffle fixed to the collection pipe designed and manufactured according to the present invention

4 is a cross-sectional view of the module designed and manufactured according to the present invention and the shape of the flexible baffle

<Brief Description of Drawings>

11; Outer vessel 12; Raw water inlet

13; Brine outlet 14; Treated water outlet

15; Sump 16; Hollow fiber membrane

17; Catchment cap 18; Fastening Piping

19; Potting part 20, 21; Hollow fiber membrane module

22; Protrusions (outside the collecting cap) 23; Protrusion (inside catch cap)

24; Treated water flow path (collecting cap side) 25; Clearance (inside collecting cap)

26; O-rings (for sealing) 27; Vessel lid

31; Screen baffles 32, 34; Insertion Fastening

33; Screen, mesh 35; Flexible screen

36, 37; Tightening Groove (Sump)

Claims (14)

In the hollow fiber membrane module with a built-in pressure vessel for water treatment, Located in the center of the potting portion, the water treatment pipe is a passage for moving the water collecting pipe for supporting the hollow fiber membrane; A hollow fiber membrane fixed to the left and right sides of the potting part to which the hollow fiber membrane is attached and fixed, for fixing the water to the outside of the water collecting pipe; And A hollow fiber membrane module with a pressure vessel built in the hollow container membrane and the collecting pipe is fastened to the left and right potting parts attached and fixed by an adhesive, and comprises a collecting cap that moves the treated water collected through the hollow fiber membrane to the collecting pipe. The method according to claim 1, The water collecting pipe has a plurality of fastening grooves formed in a lengthwise direction and inserted into the grooves formed therein to further reduce the contamination of the hollow fiber membrane to one place, thereby reducing the membrane fouling and further improving the water treatment efficiency. Container built-in membrane module. The method according to claim 1, The water collecting cap is attached by hardening with adhesive so that raw water does not flow between the potting portion and the water collecting cap, and the treated water collected through the hollow fiber membrane by the pressure inside the water collecting cap can move to the water collecting pipe and the water treatment path. Membrane module with a pressure vessel, characterized in that the protrusion 23 is further fixed to form a space for moving the treated water between the potting portion and the collecting cap. The method according to any one of claims 1 to 3, A plurality of protrusions 22 are formed at an outer side of the collecting cap to form a space in which raw water can move between the outer vessel and the collecting cap, A pressure vessel built-in membrane module, characterized in that the center of the collection cap is connected to the module and the module to form a treatment water movement path or a protruding pipe to move the treatment water. The method according to any one of claims 1 to 3, The built-in membrane module is located on the outside of the hollow fiber membrane and fixed to the potting portion with an adhesive, the hollow fiber membrane prevents sagging down by gravity and protects the hollow fiber membrane by wrapping the outside of the hollow fiber membrane, screen or free movement of raw water Membrane module with a pressure vessel further comprising a flexible screen made of a mesh shape. The method according to any one of claims 1 to 3, The hollow fiber membrane is a pressure vessel built-in membrane module produced by selecting one of the MF, UF, NF and RO membrane. In a tandem hollow fiber membrane module for water treatment, An external vessel having a raw water inlet, a treated water outlet, and a concentrated water outlet; Located in the center of the potting portion, the water treatment pipe is a passage for moving the water collecting pipe for supporting the hollow fiber membrane; A hollow fiber membrane fixed to the left and right sides of the potting part to which the hollow fiber membrane is attached and fixed, for fixing the water to the outside of the water collecting pipe; The hollow fiber membrane and the collecting pipe are fastened to the left and right potting parts fixed by the adhesive, and a hole is formed in the center to fasten the modules to each other, and a collecting cap for moving the treated water collected through the hollow fiber membrane to the collecting pipe; And Pressure vessel built-in type pressurized hollow fiber membrane module manufactured by fastening two or more pressure vessel built-in membrane modules through one pressure vessel built-in membrane module or the treated water outlet formed in the collecting cap and inserting into the outer vessel. . The method according to claim 7, A pressure vessel having a plurality of fastening grooves formed in the water collecting pipe in a lengthwise direction and inserted into the grooves formed therein and having a screen baffle which can increase the treatment efficiency by reducing membrane contamination by preventing hollow fiber membranes from being biased to one place. Built-in tandem hollow fiber membrane module. The method according to claim 7, The water collecting cap is attached to the potting portion and the water collecting cap by the adhesive so that the raw water does not flow into the coupling, and the inside of the water collecting cap through the hollow fiber membrane by the pressure so that the treated water can be moved to the water collection pipe and the treated water outlet In-line pressure type hollow fiber membrane module with a built-in pressure vessel, characterized in that the protrusion 23 is further fixed to form a space for the treatment water moves between the potting portion and the collecting cap. The method according to any one of claims 7 to 9, A plurality of protrusions are further formed on the outer side of the collecting cap at regular intervals to form a space in which raw water can move between the outer vessel and the collecting cap, In the center of the collection cap connected to the hollow fiber membrane module and the module is a series of pressure vessel built-in pressurized hollow fiber membrane module, characterized in that the treatment water outlet or protruding pipe is formed to move the treated water. The method of claim 10, wherein The built-in membrane module is located on the outside of the hollow fiber membrane and fixed to the potting portion with an adhesive, the hollow fiber membrane prevents sagging down by gravity and protects the hollow fiber membrane by wrapping the outside of the hollow fiber membrane, screen or free movement of raw water A pressure vessel built-in pressurized hollow fiber membrane module further comprising a flexible screen made of a mesh shape. The method according to claim 11, The connection between the hollow fiber membrane modules in the in-line pressurized hollow fiber membrane module is made by inserting and tightening a fastening pipe into the treated water passage or by inserting a fastening pipe into the protruding pipe. Pressurized hollow fiber membrane module. The method according to any one of claims 7 to 9, The pressure vessel built-in in-line pressurized hollow fiber membrane module can easily expand the processing capacity, to install a plurality of in-line pressurized hollow fiber membrane module horizontally, to facilitate maintenance, In-line pressure type hollow fiber membrane module with built-in pressure vessel that can connect raw water inlet, treated water outlet and concentrated water outlet in parallel. The method according to any one of claims 7 to 9, The hollow fiber membrane is a pressure vessel built-in in-line pressurized hollow fiber membrane module produced by selecting one of the MF, UF, NF and RO membrane.

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