JP2003200024A - Module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a module which has a gas-permeable membrane having large surface area regardless of its compact size and with which a liquid can be efficiently deaerated and a gas can be dissolved in the liquid. <P>SOLUTION: A bobbin consisting of a shaft part and baffle plates and a bundled hollow fiber-like gas-permeable membrane are housed in a jacket of this module. A notch and/or through-hole are formed on each of the baffle plates so that the bundled hollow fiber-like gas-permeable membrane and/or the liquid can be made to pass through the formed notch and/or through-hole. The notches and/or through-holes of the adjacent baffle plates are formed in the positions almost symmetric with respect to the shaft part, respectively. The bundled hollow fiber-like gas-permeable membrane is made to pass through the notches and/or through-holes and wound around the shaft part. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a module used for degassing a liquid or dissolving a gas in a liquid.

[0002]

2. Description of the Related Art Conventionally, among modules for degassing a liquid and modules for dissolving a gas in a liquid, those using a hollow fiber-shaped gas permeable membrane have a length substantially equal to that of the hollow fiber. It has a configuration in which a bundle of hollow fibers is linearly accommodated in a tubular outer jacket. In a module for degassing a liquid or a module for dissolving a gas in a liquid, in order to improve the efficiency of degassing or gas dissolution, it is conceivable to increase the surface area of the gas permeable membrane.

In a module having a conventional structure,
If the length of the hollow fiber is increased to increase the surface area of the gas permeable membrane, the module itself becomes long, which is not practical. Further, if the number of bundled hollow fibers is increased and the surface area of the gas permeable membrane is increased, it becomes very difficult to manufacture a module, and productivity is deteriorated.

[0004]

In view of the above situation, the present invention is compact, but has a large surface area of a gas permeable membrane, and can efficiently degas a liquid or dissolve a gas into a liquid. The purpose is to provide a module.

[0005]

The present invention is a module in which a bobbin consisting of a shaft portion and a baffle plate and a bundle of hollow fiber gas permeable membranes are housed in an outer cover. Is formed with a notch and / or a through hole for allowing the bundle-like hollow fiber gas permeable membrane and / or a liquid to pass therethrough, and the notch and / or the through hole has the above-mentioned notch in adjacent baffle plates. A module that is located substantially symmetrically with respect to the shaft portion, and further that the bundle-shaped hollow fiber gas-permeable membrane is wound around the shaft portion while passing through the notch and / or the through hole. . The present invention is described in detail below.

A module of the present invention will be described with reference to the drawings showing one embodiment thereof. FIG. 1 shows a cross-sectional view of the bobbin 2 of the module of the present invention in a plane passing through the shaft portion 2a. The module of the embodiment shown in FIG. 1 includes a jacket 1 and a shaft portion 2.
It is composed of a bobbin 2 including a and a baffle plate 2b, and a bundle of hollow fiber gas permeable membranes 3.

The module of the present invention is used for degassing a liquid or dissolving a gas from a liquid. When the module of the present invention is used for degassing a liquid, the liquid is degassed by circulating the liquid inside the hollow fiber gas permeable membrane 3 and reducing the pressure inside the jacket 1 with a vacuum pump. When the module of the present invention is used to dissolve a gas in a liquid, the gas or the liquid may be circulated inside the hollow fiber-shaped gas permeable membrane 3 or the outer jacket 1. It is preferable that a gas is circulated inside and the liquid is circulated inside the outer jacket 1 while being in contact with the hollow fiber gas permeable membrane 3. When a liquid is circulated in the hollow fiber gas permeable membrane 3, the inside of the hollow fiber gas permeable membrane 3 may be clogged when foreign matter is mixed in the liquid.

The shape of the mantle 1 is not particularly limited, and examples thereof include a columnar shape; a polygonal columnar shape such as a triangular prism and a quadrangular prism; and an ellipsoidal shape. The material forming the outer jacket 1 is not particularly limited as long as it has airtightness, and examples thereof include polyvinyl chloride, polypropylene, polyethylene and the like. However, when it is used in applications where corrosion resistance and deterioration resistance are required, the material for the jacket is
For example, perfluoroalkoxy resin (PFA), tetrafluoroethylene copolymer (PTFE), vinylidene fluoride resin, stainless steel material and the like are preferable.

The bobbin 2 comprises a shaft portion 2a and a baffle plate 2b. FIG. 2 shows a perspective view of the bobbin 2. Shaft 2
a is installed so as to penetrate the baffle plates 2b. The shape of the baffle plate 2b is not particularly limited, and the outer cover 1
The shape may be appropriately selected according to the shape of No. 1, but it is preferably circular when the outer jacket 1 is cylindrical or ellipsoidal, and is polygonal when the outer jacket 1 is polygonal. The number of baffle plates 2b is not particularly limited, but the larger the number of baffle plates 2b, the more chances of contact between the liquid and the hollow fiber gas permeable membrane can be increased, and it is preferable that the number is two or more.

The baffle plate 2b is formed with a bundle of hollow fiber-shaped gas permeable membranes 3 and / or notches 4 and / or through holes 5 for allowing liquid to pass therethrough. The notch 4 and / or the through hole 5 is provided with the shaft portion 2a between the adjacent baffles.
It is provided in a position substantially symmetrical with respect to. The module of the present invention is used to dissolve a gas in a liquid by providing the notch 4 and / or the through hole 5 so as to be substantially symmetrical with respect to the shaft portion 2a between the adjacent baffles. In this case, the liquid can be evenly distributed inside the mantle 1, which increases the chances of contact between the liquid and the hollow fiber-shaped gas permeable membrane, and the target gas can be efficiently dissolved in the liquid.

At least one end of the shaft portion 2b is provided with a bottomed hole 2c which can be connected to the outside of the module and which reaches at least the position at which the hollow fiber gas permeable membrane described below is wound, and the bottomed hole 2c. It is preferable that one end thereof communicate with each other and that a bag hole 2d that is vertically provided is formed.
FIG. 3 shows one embodiment of the module of the present invention in which such a structure is formed at both ends of the shaft portion 2b.

When such a structure is formed at both ends of the shaft portion 2b, the gas or liquid flowing inside the outer jacket 1 passes through the bottomed hole 2c and the blind hole 2d at one end of the shaft portion 2b. It flows into the module and then flows out of the outer jacket through the bag hole 2d and the bottomed hole 2c at the other end. Further, when such a structure is formed only on one end of the shaft portion 2b, the gas or liquid passes through the bottomed hole 2c and the blind hole 2d when flowing into or out of the module. When the gas or liquid flows into or out of the module, the gas or liquid passes between the hollow fiber-shaped gas permeable membranes wound around the shaft portion 2b, so that the contact between the gas or liquid and the hollow fiber-shaped gas permeable membrane is further achieved. You can increase opportunities.

The bag hole 2d is located on the opposite side of the notch and / or the through hole of the adjacent baffle plate. Accordingly, when the module of the present invention is used for dissolving gas in a liquid, the gas is circulated inside the hollow fiber-shaped gas permeable membrane 3, and the liquid flows through the inside of the mantle 1 to form the hollow fiber-shaped gas permeable membrane 3. When it is circulated while contacting with the liquid, the liquid can be evenly distributed inside the mantle 1, the chance of contact between the liquid and the hollow fiber gas permeable membrane is further increased, and the target gas is efficiently dissolved in the liquid. You can

The material forming the bobbin 2 is not particularly limited, and examples thereof include polyvinyl chloride, polypropylene, polyethylene and the like. However, when used in applications where corrosion resistance and deterioration resistance are required, examples of the material forming the bobbin 2 include perfluoroalkoxy resin (PFA) and tetrafluoroethylene copolymer (PFA).
TFE), vinylidene fluoride resin, stainless steel and the like are preferable.

The hollow fiber gas permeable membrane 3 is formed by molding a material that allows only gas to pass through but not liquid into a hollow fiber (tube) shape. The hollow fiber gas permeable membrane 3 is preferably formed by molding a silicone resin or a fluorine resin. A gas permeable film made of a silicone resin or a fluorine resin has excellent corrosion resistance and deterioration resistance.

Examples of the above-mentioned fluorine-based resin include tetrafluoroethylene-based resin polymers such as polytetrafluoroethylene copolymer (PTFE), perfluoroalkoxy resin (PFA) and fluorinated ethylene-propylene resin (FEP); Polytetrafluoroethylene and perfluoro (2,
2-dimethyl-1,3-dioxole) amorphous copolymer; fluorine-based rubber and the like, and examples of the silicone-based resin include polydimethylsiloxane and methyl silicone rubber. Any resin can be used as a raw material for the non-porous film as long as it is a perfluorinated resin.

The hollow fiber gas permeable membrane 3 may be porous or non-porous, but is preferably non-porous. When a gas is dissolved in a liquid, in a porous gas permeable membrane, first, the gas dissolves in the liquid that permeates the pores of the gas permeable membrane, and then the gas diffuses into the liquid according to the concentration gradient, so that foreign matter When the mixed liquid is circulated, the holes are clogged with foreign matter and the gas cannot be dissolved in the liquid. On the other hand, when a non-porous gas permeable film is used as the gas permeable film, the gas permeable film will not be clogged, so that a liquid containing foreign matter can be used. Further, in the porous gas permeable membrane, the gas dissolves in the liquid through the liquid that has penetrated into the pores, so the pressure of the gas must be strictly lower than the pressure of the liquid in order to penetrate the liquid into the pores. It needs to be adjusted. On the other hand, when a non-porous gas permeable membrane is used, the gas pressure does not need to be lower than the liquid pressure, and the gas pressure can be increased to efficiently dissolve the gas. If the above perfluorinated resin,
Any resin can be used as a raw material for a non-porous gas permeable membrane.

A plurality of hollow fiber-shaped gas permeable membranes 3 are bundled, and both ends are heat-sealed or adhered to each other to be housed in the outer jacket 1 of the module as a bundle-shaped hollow fiber-shaped gas permeable membrane 3. . The bundle-shaped hollow fiber-shaped gas permeable membrane 3 is
The baffle plate 2 while passing through the notch 4 and / or the through hole 5.
Is wound around the shaft portion 2a. By winding the bundle-shaped hollow fiber-shaped gas permeable membrane 3 around the shaft portion 2a of the bobbin 2, it is possible to accommodate a long hollow fiber in a compact manner and increase the surface area of the gas permeable membrane while saving space.
Efficient degassing and gas dissolution can be performed. Also,
By adopting such a configuration, it is not necessary to increase the number of hollow fibers in order to increase the surface area of the gas permeable membrane, and it is possible to easily manufacture. In the embodiment shown in FIGS. 1 and 3, the hollow fiber-shaped gas permeable membrane 3 passes through the notch 4 formed with a width that allows the bundle-shaped hollow fiber-shaped gas permeable membrane 3 to pass through, but the through holes 5 are bundled. -Shaped hollow fiber gas permeable membrane 3 is formed to have a diameter that allows passage, and through-hole 5
The bundle-shaped hollow fiber gas permeable membrane 3 may be passed through.

[0019]

The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

Example 1 A device shown in FIG. 4 was manufactured.
In the device, the inner diameter is 15 cm and the length is 2 as shown in FIG.
An ozone gas detector 7 (manufactured by Riko Kagaku Co., Ltd.) Made: OZR-3
000) through the ozone gas generator 6 (manufactured by Mitsubishi Electric Corporation:
Ozone generation unit OP-35N-S) is connected, the raw material gas is sent to the ozone gas generator 6 at an oxygen flow rate of 2 L / min and a nitrogen flow rate of 40 mL / min to generate ozone gas, and the generated ozone gas has an ozone gas pressure of 0.25.
It is pressurized to MPa and supplied to the module 8 to generate ozone water, and the generated ozone water is supplied to the pump 10 (manufactured by Takumina Corporation:
CS-52-FTC-HW). The dissolved ozone gas concentration of the generated ozone water was measured by an ozone water detector 9 (OZR-3000 manufactured by Riko Kagaku Co., Ltd.). The water pressure in the apparatus was 0.25 MPa, and the gas pressure was 0.
The flow rate was 25 MPa, and the flow rate of ozone water was 500 ml / min. The water temperature was 21 ° C.

(Embodiment 2) As a module 8, an inner diameter of 0.3 cm made of a perfluoroalkoxy resin in an outer casing having a cylindrical shape of 15 cm inner diameter × 15 cm length shown in FIG.
mm × thickness 0.03 mm × length 200 cm hollow fiber 40
A bottomed hole 2c, which accommodates zero rods, is connectable to the outside of the module at both ends of the shaft portion 2b, and reaches at least the position where the hollow fiber gas permeable membrane is wound, and one end thereof communicates with the bottomed hole 2c. In addition, ozone water was produced in the same manner as in Example 1 except that a vertically formed bag hole 2d was used.

(Comparative Example 1) As a module 8, an outer diameter of 0.3 m made of a perfluoroalkoxy resin is provided in an outer jacket having a cylindrical shape with an inner diameter of 4 cm and a length of 100 cm shown in FIG.
m × thickness 0.03 mm × length 100 cm hollow fiber 400
Ozone water was produced in the same manner as in Example 1 except that the one containing the book was used.

(Evaluation) The dissolved ozone gas concentration of ozone water 20 minutes after the operation of the apparatus was measured, and the results are shown in Table 1.

[0024]

[Table 1]

The value per unit volume (volumetric efficiency) of the ozone gas concentration of the ozone water obtained in Example 1 was 2.13 times that of Comparative Example 1. Therefore, the module used in Example 1 is
It has been clarified that the gas can be dissolved in the liquid and the liquid can be degassed more efficiently than the conventional module used in Comparative Example 1. Furthermore, the value per unit volume (volumetric efficiency) of the ozone gas concentration of the ozone water obtained in Example 2 was 2.99 times that value in Comparative Example 1,
It is also 1.40 times that value in Example 1,
It has been found that ozone gas can be dissolved in water with very high efficiency.

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned constitution, it is compact, but the surface area of the gas permeable membrane is large,
It is possible to provide a module capable of efficiently degassing a liquid or dissolving a gas in a liquid.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a surface of a bobbin 2 of a module of the present invention that passes through a shaft portion 2a.

FIG. 2 is a perspective view of the bobbin 2.

FIG. 3 is a cross-sectional view of a surface of the bobbin 2 of the module of the present invention that passes through the shaft portion 2a when a bottomed hole 2c and a blind hole 2d are formed at both ends of the shaft portion 2b.

FIG. 4 is a schematic diagram showing an apparatus used in Examples and Comparative Examples.

5 is a view showing a cross section in the longitudinal direction of the module used in Example 1. FIG.

FIG. 6 is a view showing a cross section in a longitudinal direction of a module used in Comparative Example 1.

[Explanation of symbols]

1 cloak 2 bobbins 2a Shaft 2b baffle 2c bottomed hole 2d bag hole 3 Hollow fiber gas permeable membrane 4 notches 5 through holes 6 Ozone generator 7 Ozone gas detector 8 modules 9 Ozone water detector 10 pumps

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshihiko Furuno             Sekisui Chemical, 2-1 Hyakusan, Shimamoto-cho, Mishima-gun, Osaka Prefecture             Industry Co., Ltd. (72) Inventor Kozo Shirato             5-8 Nishi-Aoki, Kawaguchi City, Saitama Prefecture Stocks             Company Earl Sea (72) Inventor Waho Kawashima             5-8 Nishi-Aoki, Kawaguchi City, Saitama Prefecture Stocks             Company Earl Sea F term (reference) 4D006 GA32 HA08 JA29A KA12                       MA01 MC28 MC65 PA01 PB01                 4D011 AA16 AA17                 4G035 AA01 AC26 AE13

Claims (2)

[Claims] 1. A module in which a bobbin including a shaft portion and a baffle plate and a bundle-shaped hollow fiber-shaped gas permeable membrane are housed in an outer jacket, wherein the baffle plate has a hollow portion. A cutout and / or a through hole for passing a filamentous gas permeable membrane and / or a liquid is formed, and the cutout and / or
Alternatively, the through holes are located substantially symmetrically with respect to the shaft portion between the adjacent baffles, and the bundle-shaped hollow fiber gas permeable membrane passes through the notches and / or the through holes. A module characterized by being wound around the shaft portion. 2. A module in which a bobbin including a shaft portion and a baffle plate and a bundle-shaped hollow fiber-shaped gas permeable membrane are housed in an outer cover, wherein the baffle plate has a hollow portion. A cutout and / or a through hole for passing a filamentous gas permeable membrane and / or a liquid is formed, and the cutout and / or
Or, the through-holes are at positions substantially symmetrical with respect to the shaft portion in adjacent baffle plates, the bundle-shaped hollow fiber-shaped gas permeable membrane, while passing through the notch and / or the through-hole, A bottomed hole that is wound around the shaft portion, is connectable to the outside of the module at least at one end of the shaft portion, and has a bottomed hole that reaches at least the position where the hollow fiber-shaped gas permeable membrane is wound around; One end of the bottom hole is communicated with the bottom hole, and a vertically provided bag hole is formed, and the bag hole is located on the opposite side of the notch and / or the through hole of the adjacent baffle plate. A module characterized by that.