JP2015047558A - Packaged fluid separation element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaged fluid separation element which does not require flashing for a long time before using the fluid separation element and can obtain an effective deoxygenation effect.SOLUTION: In a fluid separation element package, a fluid separation element 1 which includes a separation membrane wound body constituted by spirally winding a separation membrane, raw liquid channel material and filtrate channel material around a filtrate collection pipe and telescope prevention plates arranged on both edge parts of the separation membrane wound body is enclosed in a packaging member 23 together with an oxygen scavenger 22 and is closely sealed so as to intercept oxygen. Therein, the oxygen scavenger 22 is provided together with the fluid separation element 1 in a void part 31 for oxygen scavenger arrangement on a buffer member 21 provided on a telescope prevention plate 8.

Description

  The present invention relates to a packaged fluid separation element suitable for storage of a fluid separation element.

  In recent years, in ultra-pure water applications in seawater desalination and semiconductor fields, and in various fluid separation fields using membrane permeates or concentrates, such as brine desalination, organic matter separation, and wastewater reuse. The use of fluid separation elements using separation membranes has been rapidly increasing.

  Examples of the form of such a fluid separation element include those using a hollow fiber membrane, plate frame type and spiral type fluid separation elements using a flat membrane. Among these, the spiral type fluid separation element has a structure in which a separation membrane is spirally wound around a permeate collecting pipe together with a permeate flow path member and a raw liquid flow path member.

  FIG. 1 shows a partially exploded perspective view of a typical form of this spiral type fluid separation element. Usually, the fluid separation element having such a configuration has a permeate flow path material 9 between the membranes of the envelope-like membrane formed by adhering the three sides of the first separation membrane 3 and the second separation membrane 4 to each other. It is manufactured by sandwiching the raw material flow path material 10 on this and forming one membrane unit, and preparing one or a plurality of the membrane units and winding them around the permeate collecting pipe 2 in a spiral shape. The open side of the envelope-like membrane is arranged on the permeate collecting pipe 2 side.

  In the spiral fluid separation element 1, the stock solution 6 is supplied from one end face of the fluid separation element 1 and separated by the first separation film 3 and the second separation film 4. The permeate that has permeated through the separation membranes 3 and 4 flows through the permeate passage material 9 (arrow 12), and is collected by the permeate collecting pipe 2 and taken out as a permeate 13. The stock solution that has not permeated through the separation membranes 3 and 4 flows through the stock solution channel material 10 (arrow 7), and is discharged from the other end face of the fluid separation element 1 as the concentrated solution 11. Further, telescope prevention plates 8 for preventing the fluid separation element from shifting in a telescope shape are disposed at both axial ends of the fluid separation element 1.

  Conventionally, after such a fluid separation element is manufactured, it is packaged with a packaging member that can be sealed with the outside, and is shipped in a form in which the inside of the package is decompressed until it is actually used. Stored in that form. In addition, a method for filling a fluid separation element with an aqueous solution containing sodium bisulfite or formalin as a preservation solution has been proposed in order to suppress the generation of bacteria, mold, etc. during storage of the fluid separation element (Patent Literature). 1 and Patent Document 2).

  However, sodium bisulfite and formalin need to be washed and removed at the start of use of the fluid separation element, and there is a problem that flushing becomes long. Further, since formalin is strictly regulated for drainage, it is necessary to complete a wastewater treatment facility in order to drain formalin used as a preservation solution.

JP 2006-224085 A JP 2004-275945 A

  Accordingly, an object of the present invention is to provide a prepackaged fluid separation element that does not require long-time flushing before use of the fluid separation element and that provides an effective deoxygenation effect.

  The present invention is to solve the above-mentioned problems, and is a fluid separation element package that is sealed in a packaging member together with an oxygen scavenger so that oxygen is blocked.

  According to a preferable aspect of the packaged fluid separation element of the present invention, the separation membrane, the raw liquid flow path material, and the permeate flow path material are wound in a spiral shape around the permeate liquid collecting pipe to form the separation membrane wound body. And a fluid separation element having a telescoping prevention plate disposed at both ends of the separation membrane wound body and sealed in a packaging member together with an oxygen scavenger so that oxygen is shut off. It is a separation element package.

  According to a preferred aspect of the prepackaged fluid separation element of the present invention, the oxygen scavenger is disposed in the space for disposing the oxygen scavenger in the buffer member provided in at least one of the telescope prevention plates together with the fluid separation element. It is to be provided.

  According to a preferred aspect of the packaged fluid separation element of the present invention, the oxygen scavenger arrangement gap is provided on the telescope prevention plate side of the buffer member.

  According to a preferred aspect of the packaged fluid separation element of the present invention, the oxygen scavenger disposition space is provided on the side opposite to the telescope prevention plate in the buffer member, It has a through hole penetrating the oxygen scavenger disposition space side and the telescope prevention plate side.

  In the present invention, the “oxygen scavenger” means a solid one. Examples of solid oxygen scavengers include iron-based and organic materials, but iron-based materials are preferable. Examples of the dosage form include powder, granule, tablet, and sheet, and preferably a powder. The powdered product is preferably packaged with a packaging material.

  According to the present invention, the fluid separation element and the oxygen scavenger are sealed in the oxygen scavenger disposition space in the buffer member provided in at least one of the telescope prevention plates in the packaging member so that oxygen is blocked. Since it is sealed, it is not necessary to fill the fluid separation element with a preservative solution, and the flushing time can be shortened at the start of use.

FIG. 1 is a partially broken perspective view showing an example of a spiral type fluid separation element to which the present invention is applied. FIG. 2 is a partially enlarged cross-sectional view of a packaged fluid separation element to which the present invention is applied. FIG. 3 is another partially enlarged cross-sectional view of a packaged fluid separation element to which the present invention is applied. FIG. 4 is a cross-sectional view of still another partial enlarged view of a packaged fluid separation element to which the present invention is applied.

  Next, embodiments of the packaged fluid separation element of the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments shown in these drawings.

  Examples of the form of the fluid separation element include a hollow fiber membrane and a plate frame type or spiral type fluid separation element using a flat membrane.

  FIG. 1 is a partially broken perspective view showing an example of a spiral fluid separation element to which the present invention is applied. As shown in FIG. 1, a typical spiral fluid separation element 1 is a permeated water collecting pipe having a perforated liquid collecting pipe in which separation membranes 3 and 4, a raw liquid flow path material 10 and a permeate flow path material 9 are laminated. 2 is a spiral wound around the periphery of the membrane 2 to form a separation membrane winding body, telescope prevention plates 8 are installed at both ends of the separation membrane winding body, and the outer peripheral surface is covered with the outer casing 5 Take.

  Usually, the stock solution 6 is supplied from one end face of the fluid separation element 1 and separated by the separation membranes 3 and 4. The permeate that has permeated through the separation membranes 3 and 4 flows along the permeate passage material 9 (arrow 12), and is taken out as permeate 13 from the permeate collection pipe 2, while passing through the separation membranes 3 and 4. The undiluted undiluted solution 6 flows through the undiluted solution channel material 10 (arrow 7), and is discharged as the concentrated solution 11 from the other end face of the fluid separation element 1.

  Further, the separation membranes 3 and 4 are envelope-like membranes in which the sides of the membrane end 3 are sealed with an adhesive in order to prevent mixing of the supply fluid and the permeated fluid.

  The fluid separation element thus assembled is usually transported to the packaging process through an evaluation process and a storage liquid injection process.

  FIG. 2 shows an example of a packaged fluid separation element to which the present invention is applied. In FIG. 2, the packaged fluid separation element is a fluid separation element package in which the fluid separation element 1 is sealed in a packaging member 23 together with the oxygen scavenger 22 so that oxygen is shut off. The oxygen scavenger 22 may be installed on the body portion of the fluid separation element 1, the inside of the permeate collecting pipe 2, or the telescope prevention plate 8 side of the buffer member 21 provided in at least one of the telescope prevention plate 8. However, in order to obtain a more effective deoxygenating effect, it is preferable that the deoxidizing agent 22 be brought into contact with the telescope prevention plate 8 of the buffer member 21 and enclosed. The buffer member 21 is disposed to prevent damage to the telescope prevention plate 8 due to vibration or impact during transportation.

  Therefore, in the present invention, the buffer member 21 provided in the telescope prevention plate 8 is provided with the oxygen absorber disposing space 31 for disposing the oxygen absorber 22. Further, it is preferable that the oxygen scavenger arrangement gap 31 is provided on the buffer member 21 on the telescope prevention plate 8 side and / or on the fluid separation element 1 side. The buffer member 21 may be disposed at both ends of the fluid separation element 1 or may be at one end.

  Further, it is preferable that the depth H of the oxygen scavenger arrangement gap 31 is sufficiently deep at least 1.5 or more when the thickness of the oxygen scavenger 22 is 1. Further, the width W of the oxygen scavenger arrangement gap 31 is preferably smaller than 0.95 at the maximum when the diameter of the telescope prevention plate 8 is 1.

  If the depth H is too shallow, the oxygen scavenger 22 may come into contact with the end face of the fluid separation element 1 or the telescope prevention plate 8. Further, when the width W becomes equal to or larger than the diameter of the telescope prevention plate 8, the oxygen separator 22 is subjected to its own weight, and the oxidized iron is eluted to prevent the end face of the fluid separation element 1 and the telescope prevention. There is a possibility of contact with the plate 8 and adhesion or color transfer. Further, the shape of the oxygen scavenger arrangement gap 31 may be any shape such as a substantially circular shape, a substantially square shape, and a substantially trapezoidal shape.

  In addition, although the oxygen amount in the fluid separation element package varies depending on the size and configuration of the fluid separation element, it is about 1 to 16 L. Therefore, an oxygen scavenger that can inhale oxygen corresponding to each oxygen amount is used. It is preferable to use it. Further, since there is a high possibility that moisture and the like at the time of performance evaluation remain inside the fluid separation element, it is preferable that the fluid separation element is packaged with a water-resistant packaging material.

  Next, FIGS. 3 and 4 show another example of the fluid separation element packaged by the method of the present invention. In FIG. 3, the oxygen scavenger arrangement gap 42 is provided on the side of the buffer member 21 opposite to the telescope prevention plate 8, and the buffer member 21 includes the oxygen scavenger arrangement gap 42 side and the telescope prevention plate. One or more through holes 41 penetrating through the eight sides are provided. By arranging the through holes 41 and providing air (oxygen) ventilation holes, an efficient deoxygenation effect in a shorter period can be expected. Here, there are no particular restrictions on the depth, width, and shape of the oxygen scavenger arrangement gap 42. The oxygen scavenger 22 may be fixed to the buffer member 21 with a tape and an adhesive, or may be left as it is. Further, the buffer member 21 is not limited to a shape that protects the three sides of the telescope prevention plate 8, but as shown in FIG. 4, it is between the end surface of the telescope prevention plate 8 and the oxygen scavenger 22. As long as it is located and has the through hole 41, it may take any shape.

  In the present invention, the fluid separation element 1 is hermetically packaged by the packaging member 23 so that oxygen is blocked.

  The packaging member 23 regulates oxygen permeability, increases the strength of the packaging member 23 itself, and prevents the packaging member 23 from damaging the surface of the fluid separation element 1. It is preferable that the structure has three or more layers including an oxygen intrusion prevention layer and a fluid separation element surface damage prevention layer. If the external shock absorbing layer is formed of a plurality of layers, the strength is further increased, which is a more preferable embodiment. Further, when the packaging member 23 has a plurality of layers as described above, each of the above layers may be bonded to each other or may constitute a stack independent of each other (simply stacked). In the latter case, the independent layer structure can prevent propagation when cracks occur.

  As a method of providing the external shock absorbing layer of the packaging member 23 with an independent external shock absorbing layer, two or more bags may be prepared, or a method of winding a sheet around the packaging member 23 may be used. These bags and sheets preferably have a thickness of 50 μm or more and less than 300 μm from the viewpoint of preventing damage. A material made of polyethylene, polypropylene, nylon, polyester, or the like can be used.

The oxygen penetration preventing layer preferably has an oxygen permeability of 5 ml / m ² · d · atm or less, more preferably 1 ml / m ² · d · atm or less at a temperature of 23 ° C. and a relative humidity of 65%. It is desirable that the oxygen permeability is low.

  In addition, for example, a nylon film, an ethylene-vinyl alcohol copolymer resin film, and a polyethylene film can be used as the external impact absorbing layer, the oxygen intrusion preventing layer, and the fluid separation element surface damage preventing layer, respectively. . The thickness of the external shock absorbing layer is preferably 10 μm or more, and more preferably in the range of 10 to 100 μm. The thickness of the oxygen intrusion prevention layer is preferably 5 μm or more, and more preferably in the range of 5 to 30 μm. The thickness of the fluid separation element surface damage preventing layer is preferably 10 μm or more, and more preferably in the range of 10 to 150 μm.

  Moreover, it is preferable that the package internal pressure of the fluid separation element package of the present invention is reduced to −10 to −100 kPa. By reducing the internal pressure of the package, it is possible to more effectively prevent bacteria and mold remaining in the package from being propagated by residual oxygen.

  Spiral fluid separation devices are mainly used for seawater desalination, ultrapure water applications in the semiconductor field, general brine applications, and organic matter separation. Some of them may be lowered, and it may be preferable to package without adding a chemical solution. For ultra-pure water applications and other fluid separation elements that are particularly demanding for the quality of treated water, the amount of TOC elution into the treated water at the start of operation (affected by impurities such as organic carbon compounds) Since it is required to keep it low, it is desirable to pack and store it without putting a chemical solution. According to the present invention, this problem can be solved.

  Next, the packaged fluid separation element of the present invention will be described with specific examples, but the present invention is not limited to the examples.

<Example 1>
First, the reverse osmosis membrane for seawater desalination used in “TM820-400” manufactured by Toray Industries, Inc. is used as a separation membrane, and a polyethylene net having a thickness of 0.86 mm is used as a raw liquid flow path material. A tricot is used as a road material, and 26 pairs of these pairs are arranged as shown in FIG. 1, and an effective membrane area of 400 ft spirally wound around a permeate collecting tube having an outer diameter of 38.1 mm. ^2. A spiral fluid separation element having an outer diameter of 8 inches was manufactured. Then, without using a preservative solution, an oxygen absorber “AGELESS” (registered trademark) manufactured by Mitsubishi Gas Chemical Co., Ltd. (iron-based moisture-dependent type: oxygen absorption amount 2 L product) was installed at both ends of the fluid separation element. One each was inserted into the space for disposing the oxygen absorber in the buffer member provided in the scope prevention plate. This fluid separation element is sealed in a packaging member made of nylon film / ethylene-vinyl alcohol copolymer resin film / polyethylene film having a thickness of 140 μm and oxygen permeability of 1 ml / m ² · d · atm, and the pressure is reduced to −11 kPa compared to atmospheric pressure. The bag was sealed, and a polyethylene bag having a thickness of 150 μm was sealed on the outside at -11 kPa, and stored for 1 month. When opening the package, it was confirmed that no mold or the like was observed on the end face of the fluid separation element. When this fluid separation element was operated in pure water at an operating pressure of 0.5 MPa, the operation time until the concentration and pH level of the concentrated water reached the same level as that of pure water was 3 minutes.

<Comparative Example 1>
1% sodium bisulfite aqueous solution was charged as a preservative solution without using the oxygen scavenger “AGELESS” (registered trademark) (iron-based moisture-dependent type: oxygen absorption amount 2 L product) of Example 1 When the 8-inch spiral fluid separation element of the same type as that of Example 1 stored for months was operated in pure water at an operating pressure of 0.5 MPa, the concentration and pH level of the concentrated water were the same as those of pure water. It took 30 minutes to reach it. Further, when opening the package, as in Example 1, it was confirmed that generation of mold or the like was not observed on the end face of the fluid separation element.

1: Fluid separation element 2: Permeate collecting pipe 3, 4: Separation membrane 5: Exterior material 6, 7: Stock solution 8: Telescope prevention plate 9: Permeate channel material 10: Stock solution channel material 11: Concentrated water 12 , 13: Permeated water 21: Buffer member 22: Oxygen absorber 23: Packaging member 31: Oxygen agent arrangement gap 41: Through hole 42: Oxygen absorber arrangement gap

Claims (6)

  A packaged fluid separation element, wherein the fluid separation element is sealed in a packaging member together with an oxygen scavenger so that oxygen is shut off.   In the fluid separation element, a separation membrane, a stock solution channel material, and a permeate channel material are spirally wound around a permeate liquid collecting pipe to form a separation membrane winding body, and the separation membrane winding body 2. The packaged fluid separation element according to claim 1, wherein a telescope prevention plate is disposed at both ends of the package.   The oxygen scavenger is provided together with the fluid separation element in a space for disposing the oxygen scavenger in a buffer member provided in at least one of the telescope prevention plates. Packaged fluid separation element.   4. The packaged fluid separation element according to claim 3, wherein the oxygen scavenger arrangement gap is provided on the telescoping prevention plate side of the buffer member.   A gap portion for disposing the oxygen scavenger is provided on the side opposite to the telescope prevention plate in the buffer member, and the buffer member penetrates the gap portion for disposing the oxygen scavenger and the telescope prevention plate side. The packaged fluid separation element according to claim 3, wherein   A separation membrane, a raw liquid channel material and a permeate channel material are spirally wound around a permeate liquid collecting tube to form a separation membrane winding body, and telescopes are provided at both ends of the separation membrane winding body. A buffer member for a fluid separation element for protecting a fluid separation element provided with a prevention plate, wherein the buffer member is provided in at least one of the telescope prevention plates, and has a void portion for disposing an oxygen scavenger. Buffer member for fluid separation element.

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