JPH0372335B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a hollow fiber type reverse osmosis device, and in particular, a permeated fluid take-off pipe is provided so as to penetrate through a flow cylinder member of the reverse osmosis device, so that the installation and piping can be easily and easily sealed. It is made easy.

Recently, reverse osmosis equipment has come to be used for pure water production in seawater desalination and brine desalination areas. There are three types of reverse osmosis devices: tubular type, spiral type, and hollow fiber type.The hollow fiber type has a smaller permeation flow rate per unit membrane area than other types, but it has a larger surface area and is more effective overall. It has the advantage of significantly increasing the permeation flow rate and extremely high volumetric efficiency, so it has come to be widely adopted.

By the way, such a hollow fiber type reverse osmosis device (module) has one or more membrane assemblies (elements) formed in a bundle of a large number of hollow fibers in a pressure vessel (shell) in a single row or double rows. It is arranged and configured. 1 and 2 are structural explanatory diagrams showing an example of a conventional module. FIG. 1 is a single element type module, and FIG. 2 is a double element type module. In these figures, reference numeral 1 denotes a shell body, and lids 2 and 3 are attached to both sides of the body to form a shell. The element 4 disposed within the shell has a flow-through cylinder 8 formed of a perforated cylinder in the center, and a large number of hollow fibers (hollow fibers) surrounding it.
The hollow fibers 5 are each bent into a U-shape, and the bent ends thereof are buried in a resin material together with the flow-through cylinder 8 to form a resin flange portion 6. A resin material is buried together with the cylindrical body 8 to form a flange portion 7, and the hollow fibers 5 are penetrated through the flange portion 7, and the hollow portions of the hollow fibers 5 are opened on the outside of the flange portion 7. Further, the flange portion 7 is connected to the flange portion 6 on the other side.
When it is formed to have a larger diameter and is disposed within the shell body 1, a ring packing 7a is disposed around the outer periphery of the flange portion 7 so as to be watertight. On the other hand, a raw water introduction pipe 9 is connected to the flange portion 6 side of the element 4, and the pipe 9 is connected to pass through the lid body 2 and opens into the flow cylinder body 8 of the element 4. In addition, a cavity 11 is formed outside the flange portion 7 of the element 4 in the shell body 1,
The space 11 becomes a reservoir for manufactured water. A manufactured water take-out pipe 12 is provided in the lid 3 and communicates with the cavity 11. Also, in the pipe body 1, a concentrated water extraction pipe 10 is provided at an appropriate part of the outer periphery of the element 4.
is connected, and the pipe 10 is provided with a suitable on-off valve device. In addition, in the case of a double element type, the elements 4 are arranged back to back and the raw water introduction pipe 9 provided on the outer periphery of the shell body 1 is branched and communicated with each flange part 6. A manufactured water take-off pipe 12 is attached to the lids 2 and 3, respectively. One or two concentrated water take-off pipes 10 are connected to the outer periphery of the shell body 1 in the same manner as described above. When producing fresh water, raw water is pumped into the flow cylinder 8 of the element 4 through the introduction pipe 9, and the produced water that has permeated through the hollow fiber 5 through the membrane is transferred to the flange portion 7. It flows into the reservoir 11 through the hollow fiber opening 5a and is taken out from the take-out pipe 12. On the other hand, the raw water that could not penetrate becomes concentrated water and is taken out from pipe 1.
The raw water is taken out from the element 4 and permeates while moving from the center side to the outer circumferential side of the element 4.

However, in such a module, the flange portion 7 of the element 4 directly constitutes a watertight dividing wall within the shell body 1, so it is necessary to finish this joint surface within the shell body 1, and the resin material is It is difficult to cut the shell body made of , and there are problems in keeping it watertight. In addition, in such a module, the concentrated water extraction pipe 10 is connected to the shell body 1.
In the double element type, the raw water introduction pipe is also formed on the peripheral wall.

Incidentally, these modules are generally arranged in plural numbers, and are arranged in rows in the length direction of the shell, or by stacking the shells in stages. Therefore, the raw water inlet pipe 9, manufactured water outlet pipe 12, and concentrated water outlet pipe 10 connected to these modules are required to be easily connectable. However, in the conventional module as described above, the concentrated water extraction pipe and the raw water introduction pipe protrude from the outer periphery of the shell body, making these piping complex and making it difficult to arrange the module within a small volume. Also 1
Each module has multiple manufactured water extraction pipes and concentrated water extraction pipes, making the piping complex.

The present invention has been made with these points in mind. In particular, the produced water extraction pipe is configured to penetrate through the center of the element, and the raw water introduction pipe and concentrated water extraction pipe are not formed in the shell body of the module. It is constructed by providing pipes on each lid body. The present invention will be described in detail below based on the drawings, but the drawings show specific examples of implementation, and the present invention is not limited to these illustrated examples. The same implementation is possible by changing the combination or by changing the combination. Furthermore, the embodiments described in the claims do not limit the present invention. FIG. 3 is a configuration explanatory diagram showing an example of the module of the present invention, and FIG.
This figure is an explanatory view of the configuration in which a part of FIG. 3 is enlarged, FIG. 5 is a diagram on the left side of FIG. 4, and FIG. 6 shows another embodiment of the present invention in the same manner as FIG. 4. 7 is a left side view of FIG. 6, FIG. 8 is a sectional view taken along the cutting line of FIG. 6, and FIG. 9 is an explanatory diagram showing another example of the configuration of the present invention.

Further, FIGS. 10 to 13 show other embodiments of the present invention, and FIG. 10 is an explanatory view of the configuration shown in the same manner as FIG. 3 before FIG. FIG. 13, which is a sectional view taken along lines XI-XI and XII-XII in the direction of the arrows, is an explanatory view of the operation. In these figures, the element 4 used in the present invention has openings formed in resin flanges 6 and 7 on both sides thereof. A manufactured water take-out pipe 14 is disposed through the opening, and the manufactured water is passed through the taken-out pipe 14 on the manufactured water take-out side of the element 4.
It was designed to lead to.

That is, in conventional modules, the raw water inlet pipe and the concentrated water outlet pipe are provided on the outer peripheral side of the shell body, and in many cases, the raw water is introduced into the central flow cylinder 8 of the element 4. Therefore, as described above, the present invention is constructed so that the central portion of the element 4 is axially taken out and penetrated by the pipe 14, and the produced water is introduced thereto. When introducing raw water, the conventional method is to introduce the raw water into the flow cylinder 8 of the element 4, pass through a hollow fiber, and guide it toward the outer circumference of the element 4, or conversely, to introduce the raw water to the outer circumferential side of the element 4. A concentrated type in which the flow is introduced into the flow cylinder 8 is conceivable, and FIG. 3 shows an embodiment of the concentrated type.

On the other hand, in order to introduce the produced water from the element 4 to the take-out pipe 14, it is constructed as follows. That is, FIG. 4 shows a case using a mounting ring body 13, and FIG. 6 shows a case using a mounting ring body 20. In the case of a case using a mounting ring body 13, the mounting ring body 13 forms a boss portion 16, and a side wall 15 is formed around the periphery. The boss portion 16 and the inner peripheral surface of the side wall 15 form an annular groove 17. On the other hand, in the hollow fiber open side resin flange portion 7 of the element 4, a hole or a flow cylinder 8 formed in the center thereof is fitted into the boss portion 16, and the outer circumference thereof is fitted into the inner circumference of the side wall 15. Each joint surface has a ring packing 7a,
7b is provided. Further, the flange portion 7 has an annular groove 1.
Only the opening side of 7 is closed, and the back side is formed as a production water reservoir. Further, the mounting ring body 13 has a ring packing 13a arranged around it and is fixedly provided in the shell body 1, and a through hole 16a for the produced water take-out pipe 14 is formed in the center of the boss portion 16.
Ring packings 16b, 16b are provided on both sides of the through hole 16a, respectively. On the other hand, the ring packings 16b, 16b of the produced water take-out pipe 14
A plurality of through holes 14a are formed in the middle of the mounting ring body 13, and a plurality of communication holes 18 are formed in the boss portion of the mounting ring body 13 to communicate between the production water reservoir and the ring packings 16a and 16b. These through holes 14 are shown in the figure.
Although three communicating holes 18 are shown in the figure, the number can be increased or decreased as appropriate.
Further, a passage 19 is formed in the boss part 16 and communicates between the inside of the flow cylinder 8 of the element 4 and the inside of the shell.
It is installed in a position that avoids The figure shows this passage 1.
Although six 9's are shown (FIG. 5), the number can be increased or decreased or the diameter can be changed as appropriate. In addition, the mounting ring body 20 shown in FIG. 6 is attached to the open side surface of the hollow fiber open side resin flange portion 7 of the element 4, and the ring groove 1 which becomes the production water reservoir portion
7 is attached so that the hollow fiber 17 corresponds to the opening of the hollow fiber 5. The boss portion 20a closes the opening 7c of the flange portion 7. On the other hand, in the boss portion 20a, a communication hole 18 and a passage 19 are formed in the same manner as in the previous example, and the passage 19 opens into the opening 7c of the flange portion 7. Further, the produced water take-off pipe 14 passing through the boss portion 20a of the attachment ring 20 is also closed and supported by ring packings 16b, 16b, and a through hole 14a is formed therebetween, as in the previous example.

When such a mounting ring 20 is used, the flange portion 7 of the element 4 is provided directly within the shell body 1, and a ring packing 7a is provided around its outer periphery. In the module of the present invention configured in this manner, the raw water introduction pipe 9 is attached to the lid body 2, raw water is pressurized and filled around the element 4, and the concentrated water is introduced into the flow cylinder body 8 by permeation. Flow cylinder body 8
The concentrated water inside moves to the other side of the shell body 1 through a passage 19 formed in the boss portion of the attachment ring bodies 13 and 20, and is taken out from a take-out pipe 10 provided in the lid body 3. Further, the manufactured water permeated through the hollow fibers 5 of the element 4 is transferred to the communication hole 1 of the annular body.
8 into the produced water take-out pipe 14 and can be taken out to one side. FIG. 9 shows an example of a module of the present invention in which a plurality of elements are arranged, and a produced water take-off pipe 14 is arranged to penetrate the plurality of elements 4 in a skewer shape. A mounting ring 20 is attached to each element 4, and the pipe 1 takes out the manufactured water as described above.
4, the raw water is filled into the primary filling part 4a from the introduction pipe 9, becomes concentrated water by the element 4, and is filled in the secondary filling part 4b, and this process is repeated until it is discharged from the takeout pipe 10. Ru.

These embodiments show configurations of the above-mentioned centralized type. FIGS. 10 to 13 illustrate a centrifugal type according to a second embodiment of the present invention, and show a pressure vessel, lids 2 and 3, a raw water introduction pipe 9, a concentrated water extraction pipe 10, and a manufactured water extraction pipe provided thereon. The pipe 14 is constructed similarly to the first embodiment. In the centrifugal type, the center holes of the flanges 6 and 7 of the element 4 are formed as through holes for pipes for taking out produced water, and are configured to be held watertight, respectively. The flange 6 on the raw water supply side is configured to fit into the shell body 1 in a water-tight manner, and a seal ring 6a arrangement groove is formed on the outer peripheral surface of the flange 6, for example, as shown in the figure. Therefore, a raw water reservoir 6b is formed between the flange 6 and the lid 2. On the other hand, as the flange 7 on the other side,
The manufactured water is guided to the permeated fluid take-out pipe 14 using the same mounting ring 13 as in the first embodiment, but in this embodiment, the mounting ring 13
A gap 15a is actively formed between the shell body 1 and the inner circumferential surface of the shell body 1, and the element 4 is inserted through the gap 15a.
Concentrated water exiting from the outer circumferential side is guided to a take-out pipe 10 provided on the lid body 3. The mounting ring body 13 and the flange 7 are connected to the outer peripheral surface of the flange 7 and the peripheral wall 1 of the mounting ring body 13, as in the first embodiment.
The manufactured water storage section 11 is formed inside the mounting ring 13 by sealing the inner surface of the mounting ring 5. and the storage section 1
The permeated fluid take-off pipe 14 located at
A through hole 14a is formed and led out. Also, raw water reservoir 6
The raw water introduced into b flows through the flow cylinder 8 of the element 4 through the inflow hole 6c (FIG. 1) provided in the flange 6.
will be introduced in In the second embodiment configured in this manner, the boss portion 16 of the attachment ring body 13 can be formed on the side opposite to the hollow fiber holding side, so that the produced water storage portion 11 can be configured to have a large volume. Further, it is easy to hold the mounting ring 13 in a fixed position, and the introduction path can be easily configured.

As described above, in the module of the present invention, these pipes can be provided on the lid side without providing an introduction or extraction pipe on the outer periphery of the shell body, so these modules can be arranged in a row or stacked in stages. When installing, these piping can be extremely simple, and a large number of modules can be arranged in a small volume, so that the entire structure can be made compact.

[Brief explanation of drawings]

FIG. 1 is a configuration explanatory diagram showing an example of a conventional module, showing a single element type, FIG. 2 is a configuration explanatory diagram showing a double element type, FIG. 3 is a configuration explanatory diagram of a module according to the present invention, and FIG. 5 is a left side view of FIG. 4; FIG. 6 is a diagram showing another embodiment of the present invention; 7 is a left side view of FIG. 6, FIG. 8 is a sectional view taken along the cutting line - in FIG. FIG. 10 is a partially cutaway configuration explanatory diagram showing another embodiment of the present invention, and FIGS. 11 and 12 are cross sections taken along section lines XI-XI and XII-XII in FIG. 10 in the direction of the arrows. 13 are explanatory diagrams of the operation of FIG. 10. DESCRIPTION OF SYMBOLS 1... Shell body, 2, 3... Lid body, 4... Element, 5... Hollow fiber, 6, 7... Resin flange part, 8... Communication cylinder, 6c... Inflow hole, 9 ……
Raw water introduction pipe, 10...Concentrated water take-out pipe, 11...Production water reservoir, 13...Mounting ring, 1
2...Produced water take-out pipe, 14...Produced water take-out pipe, 14a...Through hole, 15...Side wall,
16... Boss portion, 17... Annular groove, 18... Communication hole, 19... Passage, 20... Mounting ring body.

Claims (1)

[Claims] 1. One or more elements 4, in which a large number of permselective hollow fibers 5 are arranged in a bundle on the outer periphery of a flow cylinder 8, and one or more of the elements 4 are fixed at both ends with a resin flange portion 7 with one side open, are installed in a pressure vessel. It is a hollow fiber type reverse osmosis device arranged in a single row inside, and the produced water take-off pipe 14 has a through hole 14a and passes through the inside of the flow cylinder 8, and is connected to the lids 2 and 3. Attachment rings 13 and 20 for taking out manufactured water are attached to the resin flange portion 7 on the side where the hollow fiber opening of the element 4 is located, and the manufactured water taking out pipe 14 and the element 4 are connected to each other. This means that the produced water collected in the mounting ring bodies 13 and 20 flows through the through hole 1.
A hollow fiber type reverse osmosis device characterized in that the hollow fiber type reverse osmosis device is connected to a position such that the produced water flows into the pipe 14 through the pipe 4a.