WO2024262314A1 - 脱気モジュール及び液体の脱気方法 - Google Patents

脱気モジュール及び液体の脱気方法 Download PDF

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Publication number
WO2024262314A1
WO2024262314A1 PCT/JP2024/020541 JP2024020541W WO2024262314A1 WO 2024262314 A1 WO2024262314 A1 WO 2024262314A1 JP 2024020541 W JP2024020541 W JP 2024020541W WO 2024262314 A1 WO2024262314 A1 WO 2024262314A1
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WO
WIPO (PCT)
Prior art keywords
pipe
baffle
housing
liquid
degassing module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2024/020541
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
航 山本
龍太 奈良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DIC Corp
Original Assignee
DIC Corp
Dainippon Ink and Chemicals Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DIC Corp, Dainippon Ink and Chemicals Co Ltd filed Critical DIC Corp
Priority to JP2025523507A priority Critical patent/JP7790637B2/ja
Priority to CN202480022531.2A priority patent/CN120882474A/zh
Publication of WO2024262314A1 publication Critical patent/WO2024262314A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/02—Hollow fibre modules

Definitions

  • This disclosure relates to a degassing module for degassing a liquid and a method for degassing a liquid.
  • degassing modules that degas liquids using multiple hollow fiber membranes have been known.
  • One such degassing module is the contactor shown in FIG. 4 of Patent Document 1.
  • This contactor includes a pipe with holes, multiple hollow fiber membranes surrounding the pipe, a pair of tube sheets that fix the ends of the multiple hollow fiber membranes to the pipe, a shell that houses the multiple hollow fiber membranes, an air inlet formed in the shell, and a liquid outlet (housing supply/discharge port) formed between the pair of tube sheets in the shell.
  • the present disclosure therefore aims to provide a degassing module and a method for degassing a liquid that can reduce variation in the flow rate of the liquid within the housing.
  • the present inventors conducted further intensive research into the above problem and found that the liquid flow rate was low at positions far from the housing liquid supply and drainage port, and high at positions close to the housing liquid supply and drainage port. From this result, the following was inferred. That is, since the multiple hollow fiber membranes extend along the extension direction of the pipe, in the intermembrane space, the fluid resistance in the extension direction of the pipe is likely to be smaller than the fluid resistance in the radial direction of the pipe. For this reason, it is inferred that a drift occurred in the intermembrane space where the liquid flowed in the extension direction of the pipe rather than in the radial direction of the pipe, which caused the liquid flow rate in the housing to vary.
  • the degassing module comprises a pipe having a plurality of holes formed therein, a hollow fiber membrane bundle in which a plurality of hollow fiber membranes extending along the extension direction of the pipe are bundled together and arranged around the pipe to cover the plurality of holes, a housing that contains the pipe and the hollow fiber membrane bundle so that a space is formed between the hollow fiber membrane bundle, a partition that divides the area within the housing into an internal area including the hollow portions of each of the plurality of hollow fiber membranes and an external area including the inter-membrane space between the plurality of hollow fiber membranes, and a baffle that is arranged in the inter-membrane space and extends in a direction intersecting the extension direction, the pipe having a pipe supply/discharge port formed at one end and opening to the outside of the housing, and a pipe sealing part that seals the pipe at the other end, and the housing having an air intake port that communicates with the internal area and a housing supply/discharge port that communicates with the
  • the liquid when liquid is supplied to the pipe from the pipe supply/discharge port, the liquid comes out of the pipe through the multiple holes, passes through the intermembrane space between the multiple hollow fiber membranes, and is discharged from the housing supply/discharge port. Also, when liquid is supplied into the housing from the housing supply/discharge port, the liquid passes through the intermembrane space between the multiple hollow fiber membranes, enters the inside of the pipe through the multiple holes in the pipe, and is discharged from the pipe supply/discharge port. At this time, the liquid can be degassed by sucking air into the internal area from the air intake port.
  • the multiple hollow fiber membranes extend along the extension direction, a biased flow occurs in the intermembrane space in which the liquid flows in the extension direction.
  • a baffle extending in a direction intersecting the extension direction is arranged in the intermembrane space, the flow of the liquid in the extension direction in the intermembrane space is hindered by the baffle.
  • the baffle can mitigate the effect of the pulling force of the liquid discharged from the housing supply/discharge port. This reduces the bias of the liquid flowing in the extension direction in the intermembrane space, thereby reducing the variation in the liquid flow rate within the housing. As a result, degassing performance can be improved.
  • the baffle may extend in the circumferential direction of the pipe.
  • the baffle extends in the circumferential direction, so that the flow of liquid in the intermembrane space in the extension direction can be effectively inhibited.
  • the baffle may extend over the entire intermembrane space in the circumferential direction.
  • the baffle extends over the entire intermembrane space in the circumferential direction, so that the flow of liquid in the intermembrane space in the extension direction can be inhibited over the entire circumferential direction.
  • the baffle may be provided in a portion of the intermembrane space in the circumferential direction.
  • the baffle is provided in a portion of the intermembrane space in the circumferential direction, so that the baffle is provided in the circumferential portion where the liquid easily flows in the extension direction and is not provided in the circumferential portion where the liquid does not easily flow in the extension direction, thereby effectively impeding the flow of liquid in the intermembrane space in the extension direction while reducing the material cost of the baffle.
  • the baffle is provided on the housing supply/drain port side of the pipe as viewed from the extension direction, and does not have to be provided on the opposite side of the housing supply/drain port of the pipe as viewed from the extension direction. In the intermembrane space, liquid tends to flow in the extension direction on the housing supply/drain port side of the pipe as viewed from the extension direction.
  • the baffle is provided on the housing supply/drain port side of the pipe as viewed from the extension direction, and is not provided on the opposite side of the housing supply/drain port of the pipe as viewed from the extension direction, so that the material cost of the baffle can be reduced while effectively obstructing the flow of liquid in the intermembrane space in the extension direction.
  • the baffle may extend in a radial direction of the pipe. In this degassing module, since the baffle extends in the radial direction, it is possible to effectively inhibit the flow of liquid in the intermembrane space in the extending direction.
  • the baffle may extend across the entire intermembrane space in the radial direction. In this degassing module, since the baffle extends across the entire intermembrane space in the radial direction, it is possible to inhibit the flow of liquid in the intermembrane space in the extending direction across the entire radial direction.
  • the baffle may be provided in a portion of the intermembrane space in the radial direction.
  • the baffle is provided in a portion of the intermembrane space in the radial direction, so that the baffle is provided in the radial portion where the liquid easily flows in the extension direction and not provided in the radial portion where the liquid does not easily flow in the extension direction, thereby effectively impeding the flow of liquid in the intermembrane space in the extension direction while reducing the material cost of the baffle.
  • the baffle may extend from the pipe to the end of the intermembrane space opposite the pipe.
  • the baffle extends from the pipe to the end of the intermembrane space opposite the pipe, so that the flow of liquid in the intermembrane space in the extension direction can be more effectively inhibited.
  • the baffle may extend from a position spaced apart from the pipe to the end of the intermembrane space opposite the pipe. In the intermembrane space, the liquid tends to flow more easily in the extension direction the further away from the pipe.
  • the baffle extends from a position spaced apart from the pipe to the end of the intermembrane space opposite the pipe, so that the material cost of the baffle can be reduced while effectively obstructing the flow of liquid in the intermembrane space in the extension direction.
  • the baffle may extend in a direction inclined relative to the radial direction of the pipe.
  • the baffle since the baffle extends in a direction inclined relative to the radial direction, the flow of liquid obstructed by the baffle can be directed in the direction of the inclination of the baffle. This makes it possible to control the flow of liquid within the housing.
  • the partition has a first sealing part that holds one end of the hollow fiber membrane bundle and seals the space between the pipe, the housing, and the hollow fiber membranes, and a second sealing part that is arranged on the opposite side of the pipe supply/discharge port of the first sealing part in the extension direction and holds the other end of the hollow fiber membrane bundle and seals the space between the pipe, the housing, and the hollow fiber membranes, and the holes in the pipe may be formed between the first sealing part and the second sealing part in the extension direction.
  • the first sealing part and the second sealing part are arranged so that the hollow fiber membranes extend along the extension direction. And, since the first sealing part and the second sealing part each seal the space between the pipe, the housing, and the hollow fiber membranes, the first sealing part and the second sealing part can divide the area inside the housing into an inner area and an outer area.
  • the housing supply and drainage port may be located near the second sealing portion, and the baffle may be located on the pipe supply and drainage port side of the housing supply and drainage port in the extension direction.
  • the baffle since the housing supply and drainage port is located near the second sealing portion, the liquid can be brought into contact with the multiple hollow fiber membranes over a long range in the extension direction.
  • the baffle since the baffle is located on the pipe supply and drainage port side of the housing supply and drainage port in the extension direction, when liquid is supplied to the pipe from the pipe supply and drainage port, the flow of liquid in the extension direction from the pipe supply and drainage port side toward the housing supply and drainage port can be obstructed.
  • the baffle may be disposed in a region on the housing liquid supply and drainage port side when the region between the first sealing portion and the housing liquid supply and drainage port in the extension direction is divided into two equal parts.
  • the baffle is disposed in a region on the housing liquid supply and drainage port side when the region between the first sealing portion and the housing liquid supply and drainage port in the extension direction is divided into two equal parts. Therefore, when liquid is supplied to a pipe from the pipe liquid supply and drainage port, the influence of the pulling force of the liquid discharged from the housing liquid supply and drainage port can be mitigated at a position close to the housing liquid supply and drainage port. This makes it possible to effectively suppress the drift of liquid caused by the pulling force of the liquid discharged from the housing liquid supply and drainage port.
  • the baffle may be disposed near the housing supply and drainage port.
  • the baffle is disposed near the housing supply and drainage port, so that when liquid is supplied to a pipe from the pipe supply and drainage port, the influence of the pulling force of the liquid discharged from the housing supply and drainage port can be mitigated near the housing supply and drainage port. This makes it possible to more effectively suppress the drift of liquid caused by the pulling force of the liquid discharged from the housing supply and drainage port.
  • the degassing module described in any one of [1] to [16] above may further include a second baffle that is disposed in the intermembrane space and extends in a direction intersecting the extension direction, and that is disposed at a position different from the baffle in the extension direction.
  • the second baffle that is disposed in the intermembrane space and extends in a direction intersecting the extension direction is disposed at a position different from the baffle in the extension direction, so that the flow of liquid in the intermembrane space in the extension direction is also impeded by the second baffle. This can further reduce the variation in the flow rate of liquid within the housing.
  • the second baffle may be disposed on the pipe supply/drain port side of the baffle in the extension direction.
  • the second baffle since the second baffle is disposed on the pipe supply/drain port side of the baffle in the extension direction, when liquid is supplied to the pipe from the pipe supply/drain port, the flow of liquid in the intermembrane space in the extension direction can be hindered further upstream.
  • the baffle may be disposed on the pipe supply/drain port side of the housing supply/drain port in the extension direction, and the second baffle may be disposed on the opposite side of the housing supply/drain port to the pipe supply/drain port in the extension direction.
  • the baffle and the second baffle are disposed to sandwich the housing supply/drain port in the extension direction, so that when liquid is supplied to the pipe from the pipe supply/drain port, the flow of liquid in the extension direction from the pipe supply/drain port side toward the housing supply/drain port can be blocked, and the flow of liquid in the extension direction from the opposite side of the pipe supply/drain port toward the housing supply/drain port can be blocked.
  • FIG. 2 is a schematic cross-sectional view of a degassing module according to an embodiment.
  • 2 is a schematic cross-sectional view taken along line II-II in FIG. 1.
  • 2 is a schematic cross-sectional view showing an enlarged portion of the degassing module shown in FIG. 1.
  • 2 is a schematic cross-sectional view showing an enlarged portion of the degassing module shown in FIG. 1.
  • 2 is a schematic cross-sectional view showing an enlarged portion of the degassing module shown in FIG. 1.
  • 5A to 5C are schematic cross-sectional views illustrating an example of a method for forming a baffle.
  • FIG. 11 is a schematic cross-sectional view of a degassing module according to a modified example.
  • FIG. 11 is a schematic cross-sectional view of a degassing module according to a modified example.
  • FIG. 11 is a schematic cross-sectional view of a degassing module according to a modified example.
  • FIG. 11 is a schematic cross-sectional view of a degassing module according to a modified example.
  • FIG. 11 is a schematic cross-sectional view of a degassing module according to a modified example.
  • FIG. 11 is a schematic cross-sectional view of a degassing module according to a modified example.
  • FIG. 11 is a schematic cross-sectional view of a degassing module according to a modified example.
  • FIG. 2 is a schematic cross-sectional view of a degassing module of Comparative Example 1.
  • 1 is a graph showing simulation results of Examples 1 and 2 and Comparative Example 1.
  • FIG. 1 is a schematic cross-sectional view of a degassing module according to an embodiment.
  • FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. 1.
  • FIGS. 3 to 5 are schematic cross-sectional views of enlarged portions of the degassing module shown in FIG. 1.
  • the degassing module 1 according to an embodiment is a module for degassing liquid L.
  • the liquid L degassed by the degassing module 1 is not particularly limited, but may be, for example, seawater, drinking water, pure water, ultrapure water, or other water, an aqueous solution in which ammonium sulfate, a surfactant, or the like is dissolved, an organic solvent such as alcohol or a hydrocarbon, or an ionic liquid.
  • the pipe 2 is a cylindrical member that extends linearly along the central axis A.
  • the direction in which the pipe 2 extends cylindrically, i.e., the direction in which the central axis A of the pipe 2 extends, is called the extension direction D1 of the pipe 2, or simply the extension direction D1.
  • the circumferential direction of the pipe 2, i.e., the direction around the central axis A, is called the circumferential direction D2 of the pipe 2, or simply the circumferential direction D2.
  • the radial direction of the pipe 2, with the central axis A as the base point, is called the radial direction D3 of the pipe 2, or simply the radial direction D3.
  • the pipe 2 forms an internal pipe flow path 21.
  • the internal pipe flow path 21 is a flow path through which the liquid L can flow, and is formed by the inner peripheral surface of the pipe 2.
  • One end of the pipe 2 in the extension direction D1 is called the first end 2a, and the other end of the pipe 2 in the extension direction D1 is called the second end 2b.
  • the pipe 2 has a pipe supply/drain port 22 formed at the first end 2a, and a pipe sealing portion 23 that seals the pipe 2 at the second end 2b.
  • the internal pipe flow path 21 is opened by the pipe supply/drain port 22, and at the second end 2b, the internal pipe flow path 21 is sealed by the pipe sealing portion 23.
  • the pipe 2 has a number of holes 24 formed therein.
  • the holes 24 are holes for allowing the liquid L to flow from the internal pipe flow path 21 to the outside of the pipe 2.
  • the holes 24 are formed in the peripheral wall of the pipe 2 and open the internal pipe flow path 21 to the outside of the pipe 2.
  • the pipe 2 has a hole forming portion 25 and a hole non-forming portion 26.
  • the hole forming portion 25 is a portion where multiple holes 24 are formed.
  • the hole non-forming portion 26 is a portion where multiple holes 24 are not formed.
  • the hole non-forming portion 26 extends along the extension direction D1 from the first end 2a, where the pipe internal flow path 21 is opened by the pipe supply/drain port 22, toward the second end 2b.
  • the hole forming portion 25 extends along the extension direction D1 from the hole non-forming portion 26 to the second end 2b, where the pipe internal flow path 21 is sealed by the pipe sealing portion 23.
  • the inner and outer diameters of the hole forming portion 25 and the non-hole forming portion 26 are not particularly limited.
  • the inner and outer diameters of the hole forming portion 25 may be larger than the inner and outer diameters of the non-hole forming portion 26.
  • the hole forming portion 25 and the non-hole forming portion 26 may be separate members, and the pipe 2 may be formed by inserting the small diameter non-hole forming portion 26 into the end of the large diameter hole forming portion 25.
  • the hollow fiber membrane bundle 3 is a bundle of multiple hollow fiber membranes 31 extending along the extension direction D1.
  • the hollow fiber membrane bundle 3 is arranged around the pipe 2 so as to cover the multiple holes 24.
  • the hollow fiber membrane bundle 3 is formed in an approximately cylindrical shape and extends along the extension direction D1. In other words, multiple hollow fiber membranes 31 extending along the extension direction D1 are bundled together so that the hollow fiber membrane bundle 3 is approximately cylindrical.
  • One end of the hollow fiber membrane bundle 3 in the extension direction D1 is called the first end 3a, and the other end of the hollow fiber membrane bundle 3 in the extension direction D1 is called the second end 3b.
  • the first end 3a is the end on the pipe supply/discharge port 22 side in the extension direction D1.
  • the second end 3b is the end opposite the pipe supply/discharge port 22 in the extension direction D1.
  • Each of the multiple hollow fiber membranes 31 is a hollow fiber-shaped membrane that allows gas G to pass through but liquid L does not.
  • the material, membrane shape, membrane form, etc. of each of the multiple hollow fiber membranes 31 are not particularly limited.
  • Examples of the material of each of the multiple hollow fiber membranes 31 include polyolefin resins such as polypropylene, polyethylene, and polymethylpentene, silicone resins such as polydimethylsiloxane and its copolymers, and fluorine-based resins such as PTFE and vinylidene fluoride.
  • each of the multiple hollow fiber membranes 31 examples include a porous membrane, a microporous membrane, and a homogeneous membrane (non-porous membrane) that does not have porosity.
  • Examples of the membrane form of each of the multiple hollow fiber membranes 31 include a symmetric membrane (homogeneous membrane) in which the chemical or physical structure of the entire membrane is homogeneous, and an asymmetric membrane (heterogeneous membrane) in which the chemical or physical structure of the membrane differs depending on the part of the membrane.
  • An asymmetric membrane (heterogeneous membrane) is a membrane that has a non-porous dense layer and a porous layer.
  • the dense layer may be formed anywhere in the membrane, such as the surface portion of the membrane or inside the porous membrane.
  • Heterogeneous membranes also include composite membranes with different chemical structures and multilayer membranes such as three-layer structures.
  • heterogeneous membranes using poly-4-methylpentene-1 resin are particularly preferred because they have a dense layer that blocks liquid L.
  • the outer diameter of each of the multiple hollow fiber membranes 31 is not particularly limited. From the viewpoint of increasing the membrane area, the outer diameter of each of the multiple hollow fiber membranes 31 can be, for example, 500 ⁇ m or less, preferably 350 ⁇ m or less, and more preferably 250 ⁇ m or less. On the other hand, from the viewpoint of suppressing breakage, the outer diameter of each of the multiple hollow fiber membranes 31 can be, for example, 50 ⁇ m or more, preferably 150 ⁇ m or more, and more preferably 200 ⁇ m or more.
  • the hollow fiber membrane bundle 3 is arranged on the outer periphery of the hole forming portion 25 of the pipe 2, and is not arranged on the outer periphery of the non-hole forming portion 26 of the pipe 2.
  • the hollow fiber membrane bundle 3 is formed in a substantially cylindrical shape so as to surround the hole forming portion 25.
  • the hollow fiber membrane bundle 3 is formed, for example, from a hollow fiber membrane fabric 8 (see FIG. 6) woven in a blind shape.
  • the hollow fiber membrane fabric 8 is a fabric in which a plurality of hollow fiber membranes 31, which become weft threads, and warp threads 9 are woven. In the hollow fiber membrane fabric 8, a plurality of hollow fiber membranes 31 are arranged in a blind shape.
  • the hollow fiber membrane bundle 3 is formed by wrapping the hollow fiber membrane fabric 8 around the hole forming portion 25 so that the plurality of hollow fiber membranes 31 extend in the extension direction D1.
  • an intermembrane space S1 is formed between the multiple hollow fiber membranes 31 (between adjacent hollow fiber membranes 31).
  • the intermembrane space S1 is a space through which liquid L can flow.
  • the intermembrane space S1 is also formed between the multiple hollow fiber membranes 31 in the circumferential direction D2 of the pipe 2, and is also formed between the multiple hollow fiber membranes 31 in the radial direction D3 of the pipe 2.
  • the housing 4 accommodates the pipe 2 and the hollow fiber membrane bundle 3 such that a space S2 is formed between the hollow fiber membrane bundle 3 and the housing 4.
  • the space S2 is a space between the hollow fiber membrane bundle 3 and the housing 4 through which the liquid L can flow.
  • the housing 4 is formed in a cylindrical shape extending in the extension direction D1.
  • the first end 2a of the pipe 2, where the pipe supply/drain port 22 is formed, protrudes from the housing 4, and the pipe supply/drain port 22 is open to the outside of the housing 4.
  • the first end 2a of the pipe 2 does not necessarily have to protrude from the housing 4, but in this embodiment, the first end 2a of the pipe 2 protrudes from the housing 4 from the viewpoint of ease of connection of other members to the pipe 2.
  • the partition 5 divides the area within the housing 4 into an internal area R1 and an external area R2.
  • the internal area R1 is an area that includes the hollow portions 32 of each of the multiple hollow fiber membranes 31.
  • the external area R2 is an area that includes the intermembrane spaces S1 between the multiple hollow fiber membranes 31. Therefore, each of the multiple hollow fiber membranes 31 serves as a boundary between the internal area R1 and the external area R2.
  • Each of the multiple hollow fiber membranes 31 prevents the passage of liquid L from the external area R2 to the internal area R1, and allows the passage of gas G (dissolved gas in the liquid L, air bubbles contained in the liquid L, etc.) from the external area R2 to the internal area R1.
  • the partition 5 has a first sealing portion 51 and a second sealing portion 52.
  • the first sealing portion 51 holds the first end portion 3a of the hollow fiber membrane bundle 3 and seals the space between the pipe 2, the housing 4, and the plurality of hollow fiber membranes 31.
  • the first end portion 3a of the hollow fiber membrane bundle 3 is fixed to the outer peripheral surface of the pipe 2 and the inner peripheral surface of the housing 4 by the first sealing portion 51.
  • the second sealing portion 52 holds the second end portion 3b of the hollow fiber membrane bundle 3 and seals the space between the pipe 2, the housing 4, and the plurality of hollow fiber membranes 31.
  • the second end portion 3b of the hollow fiber membrane bundle 3 is fixed to the outer peripheral surface of the pipe 2 and the inner peripheral surface of the housing 4 by the second sealing portion 52.
  • the first sealing portion 51 and the second sealing portion 52 are formed, for example, from a resin.
  • resins used for the first sealing portion 51 and the second sealing portion 52 include epoxy resins, urethane resins, ultraviolet curing resins, and polyolefin resins such as polyethylene and polypropylene.
  • the first sealing portion 51 and the second sealing portion 52 each fill the entire area between the pipe 2 and the housing 4 except for the multiple hollow fiber membranes 31 in a cross section perpendicular to the extension direction D1. That is, the first sealing portion 51 and the second sealing portion 52 each fill the area between the pipe 2 and the hollow fiber membrane bundle 3, between the multiple hollow fiber membranes 31 (intermembrane space S1), and between the hollow fiber membrane bundle 3 and the housing 4 (space S2) in a cross section perpendicular to the extension direction D1.
  • the hollow portion 32 of each of the multiple hollow fiber membranes 31 is open from the first sealing portion 51 to the side opposite the second sealing portion 52, and is also open from the second sealing portion 52 to the side opposite the first sealing portion 51.
  • the first sealing portion 51 is disposed between the hole forming portion 25 and the non-hole forming portion 26 in the extension direction D1.
  • the second sealing portion 52 is disposed at the end of the hole forming portion 25 opposite the non-hole forming portion 26 in the extension direction D1.
  • the multiple holes 24 of the pipe 2 are formed between the first sealing portion 51 and the second sealing portion 52 in the extension direction D1. Therefore, the region between the pipe 2 and the housing 4 on the opposite side of the first sealing portion 51 to the second sealing portion 52 is the internal region R1.
  • the region in the housing 4 on the opposite side of the second sealing portion 52 to the first sealing portion 51 is the internal region R1.
  • the housing 4 is formed with a first air intake port 41, a second air intake port 42, and a housing supply/drain port 43.
  • the first intake port 41 and the second intake port 42 are openings for drawing air from the internal region R1.
  • the first intake port 41 is formed on the opposite side of the first sealing portion 51 from the second sealing portion 52 in the extension direction D1.
  • the first intake port 41 is connected to the internal region R1 located on the opposite side of the first sealing portion 51 from the second sealing portion 52.
  • the second intake port 42 is formed on the opposite side of the second sealing portion 52 from the first sealing portion 51 in the extension direction D1.
  • the second intake port 42 is connected to the internal region R1 located on the opposite side of the second sealing portion 52 from the first sealing portion 51.
  • a suction device (not shown), such as a vacuum pump, is connected to the first intake port 41 and the second intake port 42.
  • the housing supply/drain port 43 is an opening that opens the external region R2 to the outside of the housing 4.
  • the housing supply/drain port 43 is formed between the first sealing portion 51 and the second sealing portion 52 in the extension direction D1.
  • the housing supply/drain port 43 is connected to the space S2, which is the external region R2 and is located between the first sealing portion 51 and the second sealing portion 52.
  • the position of the housing supply/drain port 43 in the extension direction D1 is not particularly limited, but in this embodiment, the housing supply/drain port 43 is located near the second sealing portion 52 in order to increase the distance between the pipe supply/drain port 22 and the housing supply/drain port 43 in the extension direction D1.
  • the housing 4 comprises a cylindrical body 4a, a first lid portion 4b, and a second lid portion 4c.
  • the cylindrical body 4a is a portion in which the hollow fiber membrane bundle 3 is housed.
  • the cylindrical body 4a is formed in a cylindrical shape extending in the extension direction D1 with both ends open.
  • the first sealing portion 51 is disposed at one open end of the cylindrical body 4a in the extension direction D1
  • the second sealing portion 52 is disposed at the other open end of the cylindrical body 4a in the extension direction D1.
  • the first end 3a of the hollow fiber membrane bundle 3 is fixed to one open end of the cylindrical body 4a by the first sealing portion 51
  • the second end 3b of the hollow fiber membrane bundle 3 is fixed to the other open end of the cylindrical body 4a by the second sealing portion 52.
  • the external region R2 is formed within the cylindrical body 4a, and the housing supply/discharge port 43 is formed in the side wall of the cylindrical body 4a and communicates with the external region R2.
  • the first lid portion 4b is a portion that forms the first internal region S3 (internal region R1).
  • the first lid portion 4b is formed in a cylindrical shape that extends in the extension direction D1 and has one end open and the other end closed.
  • the first lid portion 4b covers the side of the first sealing portion 51 opposite to the second sealing portion 52, and is attached to the open end on one side of the cylindrical body 4a so as to surround the first sealing portion 51 from the outside of the cylindrical body 4a. Therefore, by attaching the first lid portion 4b to the cylindrical body 4a, a first internal region S3 is formed inside the first lid portion 4b.
  • the first air intake 41 is formed in the side wall of the first lid portion 4b and is connected to the first internal region S3 (internal region R1).
  • the pipe 2 penetrates the first lid portion 4b, and the first lid portion 4b is attached to the outer circumferential surface of the pipe 2 so as to keep the space between the pipe 2 and the first lid portion 4b airtight.
  • the second lid portion 4c is a portion that forms the second internal region S4 (internal region R1).
  • the second lid portion 4c is formed in a cylindrical shape that extends in the extension direction D1 and has one end open and the other end closed.
  • the second lid portion 4c covers the side of the second sealing portion 52 opposite to the first sealing portion 51, and is attached to the other open end of the cylindrical body 4a so as to surround the second sealing portion 52 from the outside of the cylindrical body 4a. Therefore, by attaching the second lid portion 4c to the cylindrical body 4a, the second internal region S4 is formed inside the second lid portion 4c.
  • the second air intake 42 is formed in the side wall of the second lid portion 4c and is connected to the second internal region S4 (internal region R1).
  • the pipe sealing portion 23 is abutted against the inner surface of the second lid portion 4c.
  • the baffle 6 is for preventing the liquid L from flowing in the extension direction D1 in the intermembrane space S1.
  • the fluid resistance in the intermembrane space S1 is likely to be smaller in the extension direction D1 than in the radial direction D3.
  • a drift occurs in which the liquid L flows in the extension direction D1 rather than in the radial direction D3.
  • the flow rate of the liquid L in the housing 4 is likely to vary.
  • the baffle 6 reduces the drift of the liquid L flowing in the extension direction D1 in the intermembrane space S1 by preventing the flow of the liquid L in the extension direction D1 in the intermembrane space S1. Note that the baffle 6 does not need to prevent all of the flow of the liquid L in the intermembrane space S1 in the extension direction D1, but only needs to be able to prevent at least a part of the flow of the liquid L in the intermembrane space S1 in the extension direction D1.
  • the baffle 6 is disposed between the first sealing portion 51 and the second sealing portion 52 in the extension direction D1.
  • the baffle 6 is disposed in the intermembrane space S1 and extends in a direction intersecting the extension direction D1.
  • the baffle 6 is provided in the entire area from the pipe 2 to the end of the intermembrane space S1 opposite the pipe 2, except for the plurality of hollow fiber membranes 31, in a cross section perpendicular to the extension direction D1.
  • the baffle 6 extends in the circumferential direction D2 and radial direction D3 of the pipe 2. In other words, the baffle 6 extends in a direction perpendicular to the extension direction D1.
  • the baffle 6 also extends over the entire area of the intermembrane space S1 in the circumferential direction D2 of the pipe 2.
  • the baffle 6 also extends over the entire area of the intermembrane space S1 in the radial direction D3 of the pipe 2.
  • the baffle 6 also extends from the pipe 2 to the end of the intermembrane space S1 opposite the pipe 2.
  • the end of the intermembrane space S1 opposite the pipe 2 refers to, for example, the end of the intermembrane space S1 opposite the pipe 2 in the radial direction D3.
  • a space S2 is formed between the baffle 6 and the housing 4, but the baffle 6 may protrude beyond the intermembrane space S1 into the space S2 as long as the space S2 is not closed by the baffle 6.
  • the thickness of the baffle 6 in the extension direction D1 is not particularly limited. From the viewpoint of increasing the contact area between the liquid L and the multiple hollow fiber membranes 31, it is preferable that the thickness of the baffle 6 in the extension direction D1 is as thin as possible within the range in which the rigidity of the baffle 6 can be maintained.
  • the position of the baffle 6 in the extension direction D1 is not particularly limited.
  • the baffle 6 can be disposed in the area on the housing supply/drain port 43 side when the area between the first sealing portion 51 and the housing supply/drain port 43 in the extension direction D1 is divided into two, three, or four equal parts.
  • the baffle 6 is disposed near the housing supply/drain port 43 on the pipe supply/drain port 22 side of the housing supply/drain port 43 in the extension direction D1.
  • the baffle 6 is formed, for example, from a resin.
  • resins used for the baffle 6 include urethane-based resins such as polyurethane (PU) and thermoplastic polyurethane (TPU); polycarbonate (PC); vinyl chloride-based resins such as polyvinyl chloride (PVC) and vinyl chloride-vinyl acetate copolymer resin; acrylic resins such as polyacrylic acid, polymethacrylic acid, polymethyl acrylate, polymethyl methacrylate (PMMA), and polyethyl methacrylate; polyester-based resins such as polyethylene terephthalate (PET), polybutylene terephthalate, polytrimethylene terephthalate, polyethylene naphthalate, and polybutylene naphthalate; polyamide-based resins such as nylon (registered trademark); polystyrene (PS), imide-modified polystyrene, acrylonitrile butadiene styrene (ABS) resin,
  • FIG. 6 is a schematic cross-sectional view illustrating an example of a method for forming a baffle.
  • a hollow fiber membrane fabric 8 is wound around the pipe 2 so as to cover a plurality of holes 24 in the pipe 2.
  • the hollow fiber membrane fabric 8 is a fabric in which a plurality of hollow fiber membranes 31, which become weft threads, are woven with warp threads 9.
  • the surface of the hollow fiber membrane fabric 8 that is wound around the pipe 2 is the inner fabric surface 8a, the molten resin 10 is applied to the position of the inner fabric surface 8a corresponding to the baffle 6.
  • the hollow fiber membrane fabric 8 to which the molten resin 10 is applied is wound around the pipe 2. Then, the molten resin 10 is impregnated into the hollow fiber membrane fabric 8 on the inner layer side and the hollow fiber membrane fabric 8 on the outer layer side, and is filled in the position corresponding to the baffle 6. The molten resin 10 then hardens to become the baffle 6.
  • Air is drawn into the internal region R1 through the first and second air intakes 41 and 42, while liquid L is supplied to the external region R2 through the pipe inlet 22.
  • Air can be drawn into the internal region R1 through the first and second air intakes 41 and 42, for example, by connecting a suction device (not shown) such as a vacuum pump to the first and second air intakes 41 and 42 and operating this suction device. Then, by drawing air into the internal region R1 through the first and second air intakes 41 and 42, the internal region R1, including the hollow portions 32 of each of the multiple hollow fiber membranes 31, is placed in a depressurized state.
  • a suction device such as a vacuum pump
  • the liquid L is supplied from the pipe supply/discharge port 22 to the pipe flow path 21, exits the pipe 2 through the multiple holes 24, and is supplied to the intermembrane space S1.
  • the hollow section 32 of each of the multiple hollow fiber membranes 31 is in a depressurized state, so that gas G such as dissolved gas in the liquid L and bubbles contained in the liquid L passes through each of the multiple hollow fiber membranes 31.
  • gas G such as dissolved gas in the liquid L and bubbles contained in the liquid L passes through each of the multiple hollow fiber membranes 31.
  • the liquid L that exits from the multiple holes 24 not only flows in the radial direction D3 through the intermembrane space S1, but also flows in the extension direction D1 through the intermembrane space S1.
  • the liquid L flowing in the extension direction D1 through the intermembrane space S1 reaches the space S2 on the pipe supply/discharge port 22 side of the baffle 6 in the extension direction D1, because the flow in the extension direction D1 is obstructed by the baffle 6.
  • the liquid L degassed in the intermembrane space S1 passes through the space S2 and is discharged from the housing liquid supply/discharge port 43 to the outside of the degassing module 1.
  • the degassing module 1 when liquid L is supplied to the pipe 2 from the pipe supply/discharge port 22, the liquid L comes out of the pipe 2 from the multiple holes 24, passes through the intermembrane space S1 between the multiple hollow fiber membranes 31, and is discharged from the housing supply/discharge port 43. At this time, the liquid L can be degassed by sucking air into the internal region R1 from the first air intake 41 and the second air intake 42.
  • the multiple hollow fiber membranes 31 extend along the extension direction D1, a drift flow occurs in the intermembrane space S1 in which the liquid L flows in the extension direction D1.
  • the baffle 6 extending in a direction intersecting the extension direction D1 is disposed in the intermembrane space S1
  • the flow of the liquid L in the intermembrane space S1 in the extension direction D1 is obstructed by the baffle 6.
  • the influence of the pulling force of the liquid L discharged from the housing supply/discharge port 43 can be mitigated by the baffle 6. This reduces the bias of the liquid L flowing in the extension direction D1 in the intermembrane space S1, thereby reducing the variation in the flow rate of the liquid L within the housing 4.
  • the degassing performance can be improved.
  • the baffle 6 extends in the circumferential direction D2, so that the flow of the liquid L in the intermembrane space S1 in the extension direction D1 can be effectively inhibited.
  • the baffle 6 extends over the entire intermembrane space S1 in the circumferential direction D2, so that the flow of the liquid L in the intermembrane space S1 in the extension direction D1 can be inhibited over the entire circumferential direction D2.
  • the baffle 6 extends in the radial direction D3, so that the flow of the liquid L in the intermembrane space S1 in the extension direction D1 can be effectively inhibited.
  • the baffle 6 extends over the entire intermembrane space S1 in the radial direction D3, so that the flow of the liquid L in the intermembrane space S1 in the extension direction D1 can be inhibited over the entire radial direction D3.
  • the baffle 6 extends from the pipe 2 to the end of the intermembrane space S1 opposite the pipe 2 in the radial direction D3, so that the flow of the liquid L in the intermembrane space S1 in the extension direction D1 can be more effectively inhibited.
  • the first sealing portion 51 and the second sealing portion 52 arrange the multiple hollow fiber membranes 31 so that they extend along the extension direction D1.
  • the first sealing portion 51 and the second sealing portion 52 each seal the space between the pipe 2, the housing 4, and the multiple hollow fiber membranes 31, so that the first sealing portion 51 and the second sealing portion 52 can divide the area within the housing 4 into an inner area R1 and an outer area R2.
  • the liquid L can be brought into contact with the multiple hollow fiber membranes 31 over a long range in the extension direction D1.
  • the baffle 6 is disposed on the pipe supply/drain port 22 side of the housing supply/drain port 43 in the extension direction D1. Therefore, the flow of the liquid L in the intermembrane space S1 in the extension direction D1 can be inhibited between the pipe supply/drain port 22 and the housing supply/drain port 43 in the extension direction D1.
  • the baffle 6 is disposed in the area on the housing supply/drainage port 43 side when the area between the first sealing portion 51 and the housing supply/drainage port 43 in the extension direction D1 is divided into two equal parts, so that the influence of the pulling force of the liquid L discharged from the housing supply/drainage port 43 can be mitigated at a position close to the housing supply/drainage port 43. This makes it possible to effectively suppress the drift of the liquid L caused by the pulling force of the liquid L discharged from the housing supply/drainage port 43.
  • the baffle 6 is disposed near the housing supply/drain port 43 in the extension direction D1, so that the influence of the pulling force of the liquid L discharged from the housing supply/drain port 43 can be mitigated near the housing supply/drain port 43. This makes it possible to more effectively suppress the drift of the liquid L caused by the pulling force of the liquid L discharged from the housing supply/drain port 43.
  • the liquid L is degassed using the degassing module 1 described above, which reduces the variation in the flow rate of the liquid L within the housing 4 and improves the degassing performance.
  • the baffles have been described as extending over the entire intermembrane space in the radial direction of the pipe, but as in the degassing module 1A shown in FIG. 7, the baffles may be provided only in a portion of the intermembrane space in the radial direction of the pipe.
  • the baffles are provided in a portion of the intermembrane space in the radial direction of the pipe, the baffles are provided in the radial portion where the liquid easily flows in the extension direction, and not provided in the radial portion where the liquid does not easily flow in the extension direction, thereby effectively impeding the flow of liquid in the intermembrane space in the extension direction while reducing the material costs of the baffles.
  • FIG. 7 is a schematic cross-sectional view of a degassing module of a modified example.
  • the degassing module 1A shown in FIG. 7 is basically the same as the degassing module 1 of the above embodiment, but a baffle 6A corresponding to the baffle 6 of the degassing module 1 extends from a position spaced apart from the pipe 2 to the end of the intermembrane space S1 opposite the pipe 2.
  • the pipe 2 and the baffle 6A are spaced apart, allowing liquid L to flow between the pipe 2 and the baffle 6A.
  • the baffle 6A may be divided into multiple parts in the radial direction D3, and may not extend to the end of the intermembrane space S1 opposite the pipe 2 in the radial direction D3.
  • the baffle 6A extends from a position away from the pipe 2 to the end of the intermembrane space S1 opposite the pipe 2, so that the flow of the liquid L in the intermembrane space S1 in the extension direction D1 can be effectively inhibited while reducing the material cost of the baffle 6A.
  • the baffles have been described as extending over the entire circumferential area of the pipe, but as in the degassing module 1B shown in FIG. 8, the baffles may be provided only on a portion of the circumferential area of the pipe.
  • the baffles are provided in a portion of the intermembrane space in the circumferential direction, the baffles are provided in the circumferential portion where the liquid easily flows in the extension direction, and no baffles are provided in the circumferential portion where the liquid does not easily flow in the extension direction, thereby effectively impeding the flow of liquid in the intermembrane space in the extension direction while reducing the material costs of the baffles.
  • FIG. 8 is a schematic cross-sectional view of a degassing module of a modified example.
  • the degassing module 1B shown in FIG. 8 is basically the same as the degassing module 1 of the above embodiment, but the baffle 6B corresponding to the baffle 6 of the degassing module 1 is provided on the housing supply/drain port 43 side of the pipe 2 when viewed from the direction along the central axis A (extension direction D1) (see FIG. 2), but is not provided on the opposite side of the housing supply/drain port 43 of the pipe 2.
  • the baffle 6B is provided in the area on the housing supply/drain port 43 side, and is not provided in the area opposite the housing supply/drain port 43.
  • the baffle 6B may be divided into multiple parts in the circumferential direction D2.
  • liquid L tends to flow in the extension direction D1 on the side of the housing liquid supply/drain port 43 of the pipe 2 as viewed from the extension direction D1.
  • the baffle 6B is provided on the side of the housing liquid supply/drain port 43 of the pipe 2 as viewed from the extension direction D1, and is not provided on the opposite side of the housing liquid supply/drain port 43 of the pipe 2 as viewed from the extension direction D1, so that the material cost of the baffle 6B can be reduced while effectively obstructing the flow of liquid L in the intermembrane space S1 in the extension direction D1.
  • the baffles are described as extending in a direction perpendicular to the extension direction of the pipe, but the baffles may extend in a direction inclined relative to the radial direction of the pipe, as in the degassing module 1C shown in Figure 9.
  • FIG 9 is a schematic cross-sectional view of a modified degassing module.
  • the degassing module 1C shown in Figure 9 is basically the same as the degassing module 1 of the above embodiment, but the baffle 6C corresponding to the baffle 6 of the degassing module 1 extends in a direction inclined with respect to the radial direction D3, and extends in a direction away from the housing liquid supply and drainage port 43 in the extension direction D1 as it moves away from the pipe 2.
  • the baffle 6C is positioned so as to prevent the liquid L in the intermembrane space S1 from flowing toward the housing liquid supply and drainage port 43.
  • the baffle 6C extends in the extension direction D1 away from the housing liquid supply/drainage port 43 as it moves away from the pipe 2, so that the liquid L flowing in the extension direction D1 in the intermembrane space S1 can be directed once away from the housing liquid supply/drainage port 43 and then toward the housing liquid supply/drainage port 43. This makes it possible to increase the contact distance between the liquid L and the multiple hollow fiber membranes 31.
  • the degassing module is described as having one baffle, but the degassing module may have multiple baffles, such as degassing module 1D shown in FIG. 10 and degassing module 1E shown in FIG. 11.
  • FIG. 10 is a schematic cross-sectional view of a degassing module of a modified example.
  • the degassing module 1D shown in FIG. 10 is basically the same as the degassing module 1 of the above embodiment, but includes a second baffle 7 in addition to the baffle 6.
  • the second baffle 7 is disposed in the intermembrane space S1, like the baffle 6, and extends in a direction intersecting the extension direction D1.
  • the configuration, shape, etc. of the second baffle 7 may be the same as or different from the baffle 6.
  • the second baffle 7 is disposed at a different position from the baffle 6 in the extension direction D1.
  • the second baffle 7 is disposed on the pipe supply/drain port 22 side of the baffle 6 in the extension direction D1, that is, on the opposite side to the housing supply/drain port 43 of the baffle 6 in the extension direction D1.
  • the second baffle 7, which is disposed in the intermembrane space S1 and extends in a direction intersecting the extension direction D1 is disposed at a different position in the extension direction D1 from the baffle 6, so that the flow of the liquid L in the intermembrane space S1 in the extension direction is also impeded by the second baffle 7. This makes it possible to further reduce the variation in the flow rate of the liquid L within the housing 4.
  • the second baffle 7 is disposed on the pipe supply/discharge port 22 side of the baffle 6 in the extension direction D1, so that the flow of the liquid L in the intermembrane space S1 in the extension direction D1 can be inhibited further upstream.
  • FIG. 11 is a schematic cross-sectional view of a degassing module of a modified example.
  • the degassing module 1E shown in FIG. 11 is basically the same as the degassing module 1 of the above embodiment, but in addition to the baffle 6, it is provided with a second baffle 7, and the housing supply and drainage port 43 is formed in the center between the first sealing portion 51 and the second sealing portion 52 in the extension direction D1.
  • the baffle 6 is arranged near the housing supply and drainage port 43 on the pipe supply and drainage port 22 side of the housing supply and drainage port 43 in the extension direction D1, similar to the degassing module 1 of the above embodiment.
  • the second baffle 7 is arranged in the intermembrane space S1 and extends in a direction intersecting the extension direction D1, similar to the baffle 6.
  • the configuration, shape, etc. of the second baffle 7 may be the same as or different from the baffle 6.
  • the second baffle 7 is arranged in a different position from the baffle 6 in the extension direction D1.
  • the second baffle 7 is disposed near the housing supply/drain port 43 on the opposite side of the housing supply/drain port 43 from the pipe supply/drain port 22 in the extension direction D1.
  • the second baffle 7, which is disposed in the intermembrane space S1 and extends in a direction intersecting the extension direction D1 is disposed at a different position in the extension direction D1 from the baffle 6. Therefore, the flow of the liquid L in the intermembrane space S1 in the extension direction is also impeded by the second baffle 7. This makes it possible to further reduce the variation in the flow rate of the liquid L within the housing 4.
  • the baffle 6 is arranged on the pipe supply and drainage port 22 side of the housing supply and drainage port 43 in the extension direction D1
  • the second baffle 7 is arranged on the opposite side of the housing supply and drainage port 43 from the pipe supply and drainage port 22 in the extension direction D1.
  • the baffle 6 and the second baffle 7 are arranged to sandwich the housing supply and drainage port 43 in the extension direction D1. Therefore, it is possible to inhibit the flow of liquid L from the pipe supply and drainage port 22 side toward the housing supply and drainage port 43 in the extension direction D1, and it is also possible to inhibit the flow of liquid L from the opposite side of the pipe supply and drainage port 22 toward the housing supply and drainage port 43 in the extension direction D1.
  • the housing supply and drainage port 43 is formed in the center between the first sealing portion 51 and the second sealing portion 52, so that a high effect is achieved.
  • the method of degassing the liquid was described as supplying the liquid to the external area from the pipe supply/drain port, but the liquid may also be supplied to the external area from the housing supply/drain port.
  • FIG. 12 is a schematic cross-sectional view of a degassing module of a modified example.
  • the degassing module shown in FIG. 12 is the same as the degassing module shown in FIG. 1, and only the flow of the liquid differs from that shown in FIG. 1.
  • the internal region R1 is sucked in through the first intake port 41 and the second intake port 42, and the liquid L is supplied to the external region R2 from the housing liquid supply/discharge port 43. Then, the liquid L is supplied to the intermembrane space S1 through the space S2 from the housing liquid supply/discharge port 43.
  • the hollow portion 32 of each of the multiple hollow fiber membranes 31 is in a depressurized state, the dissolved gas in the liquid L and the gas G such as bubbles contained in the liquid L pass through each of the multiple hollow fiber membranes 31. This causes the liquid L to be degassed.
  • the liquid L supplied to the intermembrane space S1 from the housing liquid supply/discharge port 43 through the space S2 not only flows through the intermembrane space S1 in the opposite direction to the radial direction D3, but also flows through the intermembrane space S1 in the extension direction D1.
  • the liquid L flowing in the intermembrane space S1 in the extension direction D1 reaches the pipe 2 on the housing liquid supply/drain port 43 side of the baffle 6 in the extension direction D1 because the flow in the extension direction D1 is obstructed by the baffle 6.
  • the liquid L degassed in the intermembrane space S1 is supplied to the pipe flow path 21 from the multiple holes 24 of the pipe 2 and is discharged to the outside of the degassing module 1 from the pipe liquid supply/drain port 22.
  • the position, shape, number, etc. of the baffle are not particularly limited and can be the same as the above-mentioned modified example, for example.
  • the degassing module 1 shown in Fig. 1 was used as the simulation model for Example 1.
  • the degassing module 1D shown in Fig. 10 was used as the simulation model for Example 2.
  • the degassing module 101 shown in Fig. 13 was used as the simulation model for Comparative Example 1.
  • the degassing module 101 shown in Fig. 13 is basically the same as the degassing module 1 shown in Fig. 1, and differs from the degassing module 1 shown in Fig. 1 only in that it does not include a baffle 6.
  • the simulation model for Example 1 is a model with one baffle
  • the simulation model for Example 2 is a model with two baffles
  • the simulation model for Comparative Example 1 is a model without a baffle.
  • the flow rate of the liquid flowing through the space S2 was calculated by simulation for the simulation models of Examples 1 and 2 and Comparative Example 1.
  • ANSYS FLUENT was used as the analysis software.
  • water at 25°C was used as the liquid model, and a constant resistance value was set as the resistance to the passage of the liquid through the hollow fiber membrane bundle.
  • the calculation points for the flow rate of the liquid were six points each in the space S2 on the opposite side of the housing liquid supply and drainage port 43 of the pipe 2 and in the space S2 on the housing liquid supply and drainage port 43 side of the pipe 2.
  • the calculation points for the flow rate of the liquid in the space S2 on the opposite side of the housing liquid supply and drainage port 43 of the pipe 2 were numbered 1 to 6 in order of proximity to the pipe liquid supply and drainage port 22.
  • the calculation points for the flow rate of the liquid in the space S2 on the housing liquid supply and drainage port 43 side of the pipe 2 were numbered 7 to 12 in order of proximity to the pipe liquid supply and drainage port 22.
  • the calculation results are shown in
  • Example 1 In the space S2 on the housing liquid supply/drain port 43 side of the pipe 2, in Comparative Example 1, the liquid flow rate was small at positions far from the housing liquid supply/drain port 43, and was large at positions close to the housing liquid supply/drain port 43. In contrast, in both Examples 1 and 2, there was no significant variation in the flow rate over the entire extension direction D1, and the variation in the flow rate was significantly smaller than in Comparative Example 1. Furthermore, Example 2 had smaller variation in the flow rate than Example 1.
  • baffles can reduce the variation in the liquid flow rate within the housing.
  • increasing the number of baffles can further reduce the variation in the liquid flow rate within the housing.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Degasification And Air Bubble Elimination (AREA)
PCT/JP2024/020541 2023-06-23 2024-06-05 脱気モジュール及び液体の脱気方法 Ceased WO2024262314A1 (ja)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264171A (en) * 1991-12-31 1993-11-23 Hoechst Celanese Corporation Method of making spiral-wound hollow fiber membrane fabric cartridges and modules having flow-directing baffles
JPH115024A (ja) * 1997-06-17 1999-01-12 Dainippon Ink & Chem Inc 中空糸膜処理器
JP2000509329A (ja) * 1996-10-24 2000-07-25 コンパクト・メンブレン・システムズ・インコーポレイテッド 液体のガス化及び脱ガス化法
JP2005279647A (ja) * 2004-03-30 2005-10-13 Celgard Inc ３極高性能小型中空繊維膜接触器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5264171A (en) * 1991-12-31 1993-11-23 Hoechst Celanese Corporation Method of making spiral-wound hollow fiber membrane fabric cartridges and modules having flow-directing baffles
JP2000509329A (ja) * 1996-10-24 2000-07-25 コンパクト・メンブレン・システムズ・インコーポレイテッド 液体のガス化及び脱ガス化法
JPH115024A (ja) * 1997-06-17 1999-01-12 Dainippon Ink & Chem Inc 中空糸膜処理器
JP2005279647A (ja) * 2004-03-30 2005-10-13 Celgard Inc ３極高性能小型中空繊維膜接触器

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