Degassing module and method for degassing liquid

Abstract

The present invention reduces the pressure loss of a liquid. More specifically, this degassing module 1 comprises: a pipe 2 that forms a pipe inner flow path 23 having a liquid supply port 21 and a liquid discharge port 22, and has a plurality of holes 24 formed therein; a hollow fiber membrane group 3 in which a plurality of hollow fiber membranes 31 are disposed on the outer circumferential side of the pipe 2 so as to cover the plurality of holes 24; a housing 4 that stores the hollow fiber membrane group 3; a partition part 5 that partitions the region inside the housing 4 into an inner region R1 including the inner circumferential–side space 32 of each of the plurality of hollow fiber membranes 31, and an outer region R2 including inter-membrane spaces S1 between the plurality of hollow fiber membranes 31; an intake port 41 of the housing 4 that communicates with the inner region R1; a baffle 6 that partitions the pipe inner flow path 23 of the pipe 2 and the inter-membrane spaces S1 in the extension direction D of the pipe 2; and a support part 7 that is disposed on the liquid discharge port 22 side of the baffle 6 and supports at least a portion of the plurality of hollow fiber membranes 31 with respect to the pipe 2.

Description

[Technical field]

[0001] The present invention relates to a degassing module for degassing a liquid and a method for degassing a liquid. [Background technology]

[0002] Conventionally, degassing modules that degas liquids using a plurality of hollow fiber membranes have been known. For example, there is a contactor described in Patent Document 1 as such a degassing module. The contactor described in Patent Document 1 includes a pipe with holes, a plurality of hollow fiber membranes surrounding the pipe, a baffle that redirects the flow of the liquid, a tube sheet that fixes the ends of the plurality of hollow fiber membranes to the pipe, a shell that houses the plurality of hollow fiber membranes, and an air inlet formed in the shell. In this contactor, when liquid is supplied to the pipe, the liquid leaves the pipe on the upstream side of the baffle, passes through the intermembrane space between the plurality of hollow fiber membranes, passes between the baffle and the shell, then passes through the intermembrane space between the plurality of hollow fiber membranes, and re-enters the pipe on the downstream side of the baffle. At this time, the inner cavity of the hollow fiber membrane is vacuum-suctioned from the air inlet, so that the gas accompanying the liquid moves to the inner cavity side of the hollow fiber membrane, and the liquid is degassed. The degassed liquid is then discharged from the pipe. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-038904 A Summary of the Invention [Problem to be solved by the invention]

[0004] The degassing performance of the degassing module can be improved by providing a baffle in the degassing module, as in the contactor described in Patent Document 1. This effect is particularly significant in large degassing modules.

[0005] However, in the contactor described in Patent Document 1, the hollow fiber membranes downstream of the baffle are pressed against the pipe by the flow of liquid that passes over the baffle and re-enters the pipe, resulting in a problem that the hollow fiber membranes on the outer periphery slip between the hollow fiber membranes on the inner periphery, narrowing the intermembrane space between the hollow fiber membranes that serves as a liquid flow path, resulting in an increase in pressure loss for the liquid.

[0006] Therefore, an object of the present invention is to provide a degassing module and a method for degassing a liquid that can reduce the pressure loss of the liquid. [Means for solving the problem]

[0007] The degassing module of the present invention comprises a pipe forming an internal flow path having a liquid supply port and a liquid discharge port and having a plurality of holes formed therein that open the internal flow path of the pipe, a group of hollow fiber membranes formed by arranging a plurality of hollow fiber membranes on the outer periphery of the pipe so as to cover the plurality of holes, a housing connected to the outer periphery of the pipe and accommodating the group of hollow fiber membranes, a partition section that divides the area within the housing into an internal area including an inner periphery space of each of the plurality of hollow fiber membranes and an external area including an intermembrane space between the plurality of hollow fiber membranes, an air intake port of the housing connected to the internal area, a baffle that divides the internal flow path of the pipe and the intermembrane space in the extension direction of the pipe, and a support section that is arranged on the liquid discharge port side of the baffle in the extension direction and supports at least a portion of the plurality of hollow fiber membranes against the pipe.

[0008] In this degassing module, liquid can be degassed by sucking air into the internal region through the air intake and supplying liquid to the pipe flow path through the liquid supply port. The pipe flow path and the intermembrane space are partitioned in the extension direction by a baffle. Therefore, when liquid is supplied to the pipe flow path from the liquid supply port, the liquid leaves the pipe at the liquid supply port side of the baffle, passes through the intermembrane space, passes through the baffle clearance between the baffle and the housing, passes through the intermembrane space, and re-enters the pipe at the liquid outlet side of the baffle. In this way, by complicating the liquid flow with the baffle, degassing performance can be improved compared to a case where a baffle is not provided.

[0009] Here, on the liquid outlet side of the baffle, the hollow fiber membranes are pressed against the pipe by the flow of liquid that passes over the baffle and re-enters the pipe. However, a support part that supports at least a part of the hollow fiber membranes against the pipe is disposed on the liquid outlet side of the baffle, which is the downstream side of the baffle. This prevents the hollow fiber membranes on the outer periphery from slipping between the hollow fiber membranes on the inner periphery, etc., due to the flow of liquid that passes over the baffle and re-enters the pipe, thereby preventing the intermembrane space, which serves as a liquid flow path, from narrowing. As a result, the pressure loss of the liquid can be reduced compared to when the support part is not disposed.

[0010] The support part may support all of the hollow fiber membranes relative to the pipe. In this degassing module, since the support part supports all of the hollow fiber membranes relative to the pipe, it is possible to further suppress narrowing of the intermembrane space, which serves as a liquid flow path, due to the flow of liquid that crosses the baffle and re-enters the pipe.

[0011] The support part may be spaced apart from the housing. In this degassing module, since the support part is spaced apart from the housing, the liquid that has passed over the baffle can flow along the inner circumferential surface of the housing until it passes over the support part. This makes it possible to expand the area where the liquid comes into contact with the plurality of hollow fiber membranes on the liquid outlet side of the support part, which is the downstream side of the support part.

[0012] The baffle may be spaced apart from the housing. In this degassing module, since the baffle is spaced apart from the housing, it is possible to reduce a pressure loss of the liquid when the liquid passes through a baffle clearance between the baffle and the housing.

[0013] The baffle may divide the entire intermembrane space in the extension direction. In this degassing module, the baffle divides the entire intermembrane space in the extension direction, so that the liquid coming out of the pipe can flow to the outside of the hollow fiber membrane group on the liquid supply port side of the baffle, which is the upstream side of the baffle. This makes it possible to increase the contact time between the multiple hollow fiber membranes and the liquid, thereby improving the degassing efficiency of the liquid.

[0014] A liquid flow space through which the liquid can flow may be formed between the hollow fiber membrane group and the housing. In this degassing module, the liquid flow space is formed between the hollow fiber membrane group and the housing, so that the liquid coming out of the pipe can pass through the intermembrane space and enter the liquid flow space, and then pass from the liquid flow space through the intermembrane space and enter the pipe. This makes it possible to reduce the pressure loss of the liquid L while bringing the liquid into contact with the multiple hollow fiber membranes.

[0015] The support part does not have to be disposed in the liquid flow space. In this degassing module, since the support part is not disposed in the liquid flow space, it is possible to reduce the pressure loss of the liquid passing through the liquid flow space, compared to when the support part is disposed in the liquid flow space.

[0016] The baffle may have an inner baffle disposed on the inner periphery of the pipe to divide the flow path in the extension direction, and an outer baffle disposed on the outer periphery of the pipe to divide the inter-membrane space in the extension direction. In this degassing module, the baffle has an inner baffle disposed on the inner periphery of the pipe and an outer baffle disposed on the outer periphery of the pipe, so that the baffle can be disposed without dividing the pipe in the extension direction.

[0017] The partition has a first sealing part arranged at a first end part on one side of the hollow fiber membrane group in the extension direction, and a second sealing part arranged at a second end part on the other side of the hollow fiber membrane group in the extension direction, and each of the first sealing part and the second sealing part may be filled in the entire area between the pipe and the housing, except for the plurality of hollow fiber membranes, in an orthogonal cross section perpendicular to the extension direction, and the plurality of holes in the pipe may be formed between the first sealing part and the second sealing part in the extension direction. In this degassing module, each of the first sealing part and the second sealing part is filled in the entire area between the pipe and the housing, except for the plurality of hollow fiber membranes, in an orthogonal cross section perpendicular to the extension direction, and the plurality of holes in the pipe may be formed between the first sealing part and the second sealing part. Therefore, the first sealing part and the second sealing part can divide the area inside the housing into an internal area and an external area. And, since the first sealing part and the second sealing part are arranged at the first end part on one side of the hollow fiber membrane group in the extension direction and the second end part on the other side, the liquid can be brought into contact with the plurality of hollow fiber membranes over a long range in the extension direction.

[0018] The air intake may include a first air intake formed on the side of the first sealed part opposite the second sealed part in the extension direction, and a second air intake formed on the side of the second sealed part opposite the first sealed part in the extension direction. In this degassing module, the first air intake and the second air intake are formed on the outsides of the first sealed part and the second sealed part in the extension direction, so that air can be sucked into the inner circumferential space of each of the hollow fiber membranes from both ends of the hollow fiber membranes. This can improve the degassing efficiency of the liquid.

[0019] A method for degassing a liquid according to the present invention includes any one of the above-mentioned degassing modules, in which air is sucked into an internal region through an air intake port and liquid is supplied to an internal flow path of a pipe through a liquid supply port. Since this method for degassing a liquid uses any one of the above-mentioned degassing modules to degas the liquid, it is possible to reduce pressure loss of the liquid. Effect of the Invention

[0020] According to the present invention, the pressure loss of the liquid can be reduced. [Brief description of the drawings]

[0021] [Figure 1] FIG. 2 is a schematic cross-sectional view of a degassing module according to an embodiment. [Diagram 2] FIG. 2 is a schematic cross-sectional view taken along line II-II shown in FIG. [Diagram 3] 2 is a schematic enlarged cross-sectional view of a portion of the degassing module shown in FIG. 1. [Figure 4] 2 is a schematic enlarged cross-sectional view of a portion of the degassing module shown in FIG. 1. [Diagram 5] 2 is a schematic enlarged cross-sectional view of a portion of the degassing module shown in FIG. 1. [Figure 6] 2 is a schematic enlarged cross-sectional view of a portion of the degassing module shown in FIG. 1. [Figure 7] 5A to 5C are schematic cross-sectional views illustrating an example of a method for forming a baffle and a support portion. [Figure 8] 5A to 5C are schematic cross-sectional views illustrating an example of a method for forming a baffle and a support portion. [Figure 9] 4 is a graph showing the measurement results of pressure loss in Comparative Example 1. [Figure 10] 1 is a graph showing the measurement results of pressure loss in Example 1 and Comparative Example 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, a degassing module and a liquid degassing method according to an embodiment will be described with reference to the drawings. In all the drawings, the same or corresponding parts are denoted by the same reference numerals, and duplicated explanations will be omitted.

[0023] 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 6 are schematic cross-sectional views of enlarged portions of the degassing module shown in Fig. 1. As shown in Figs. 1 to 6, a degassing module 1 according to an embodiment is a module for degassing a liquid L. The liquid L degassed by the degassing module 1 is not particularly limited, and 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 hydrocarbon, or an ionic liquid.

[0024] The degassing module 1 includes a pipe 2, a hollow fiber membrane group 3, a housing 4, a partition section 5, a baffle 6, and a support section .

[0025] The pipe 2 is a cylindrical member extending linearly along a central axis A. The direction in which the pipe 2 extends cylindrically, i.e., the direction of the central axis A, is referred to as the extension direction D. The pipe 2 forms an inner-pipe flow path 23 having a liquid supply port 21 and a liquid discharge port 22. The inner-pipe flow path 23 is a flow path formed by the inner circumferential surface of the pipe 2, through which the liquid L can flow.

[0026] The pipe 2 is formed with a plurality of holes 24 that open the in-pipe flow path 23. The plurality of holes 24 are holes for discharging the liquid L from the in-pipe flow path 23 to the outside of the pipe 2 and for introducing the liquid L from the outside of the pipe 2 into the in-pipe flow path 23.

[0027] The pipe 2 has a hole forming portion 25, a first non-hole forming portion 26, and a second non-hole forming portion 27. The hole forming portion 25 is a portion where a plurality of holes 24 are formed. The first non-hole forming portion 26 and the second non-hole forming portion 27 are portions where a plurality of holes 24 are not formed. The hole forming portion 25 is located in the center of the pipe 2 in the extension direction D. The first non-hole forming portion 26 is adjacent to the liquid supply port 21 side of the hole forming portion 25 in the extension direction D. The second non-hole forming portion 27 is adjacent to the liquid discharge port 22 side of the hole forming portion 25 in the extension direction D.

[0028] The inner and outer diameters of the hole forming portion 25, the first non-hole forming portion 26, and the second non-hole forming portion 27 are not particularly limited. For example, from the viewpoint of increasing the total area of ​​the multiple holes 24, the inner and outer diameters of the hole forming portion 25 may be larger than the inner and outer diameters of the first non-hole forming portion 26 and the second non-hole forming portion 27. For example, the hole forming portion 25, the first non-hole forming portion 26, and the second non-hole forming portion 27 may be separate members, and the pipe 2 may be formed by inserting the small-diameter first non-hole forming portion 26 and the small-diameter second non-hole forming portion 27 into both ends of the large-diameter hole forming portion 25.

[0029] The hollow fiber membrane group 3 is configured such that a plurality of hollow fiber membranes 31 are arranged on the outer circumferential side of the pipe 2 so as to cover a plurality of holes 24. In other words, the hollow fiber membrane group 3 is configured by a plurality of hollow fiber membranes 31 arranged on the outer circumferential side of the pipe 2 so as to cover a plurality of holes 24.

[0030] Each of the hollow fiber membranes 31 is a hollow fiber membrane that allows gas G to permeate but does not allow liquid L to permeate. The material, membrane shape, membrane form, etc. of each of the hollow fiber membranes 31 are not particularly limited. Examples of the material of each of the hollow fiber membranes 31 include polyolefin resins such as polypropylene, polyethylene, and polymethylpentene, silicon resins such as polydimethylsiloxane and its copolymers, and fluorine resins such as PTFE and vinylidene fluoride. Examples of the membrane shape (sidewall shape) of each of the hollow fiber membranes 31 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 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. In this case, the dense layer may be formed anywhere in the membrane, such as the surface layer of the membrane or inside the porous membrane. Heterogeneous membranes include composite membranes with different chemical structures and multilayer membranes such as three-layer structures. In particular, heterogeneous membranes using poly-4-methylpentene-1 resin are particularly preferred because they have a dense layer that blocks liquid L. In addition, when used in an external perfusion type, it is preferable that the dense layer is formed on the outer surface.

[0031] There is no particular limitation on the outer diameter of each of the hollow fiber membranes 31. From the viewpoint of increasing the membrane area, the outer diameter of each of the hollow fiber membranes 31 can be, for example, 500 μm or less, preferably 350 μm or less, and more preferably 250 μm or less. On the other hand, from the viewpoint of suppressing breakage, the outer diameter of each of the hollow fiber membranes 31 can be, for example, 50 μm or more, preferably 150 μm or more, and more preferably 200 μm or more.

[0032] The hollow fiber membrane group 3 is disposed on the outer periphery of the hole-formed portion 25 of the pipe 2, and is not disposed on the outer periphery of the first non-hole-formed portion 26 and the second non-hole-formed portion 27 of the pipe 2. The hollow fiber membrane group 3 is formed in a substantially cylindrical shape so as to surround the hole-formed portion 25. The hollow fiber membrane group 3 is formed, for example, by a hollow fiber membrane fabric 8 (see FIG. 8) woven in a blind shape. The hollow fiber membrane fabric 8 is a fabric in which a plurality of hollow fiber membranes 31 serving as weft threads and warp threads 9 are woven. In the hollow fiber membrane fabric 8, a plurality of hollow fiber membranes 31 are disposed in a blind shape. The interval between adjacent hollow fiber membranes 31 can be adjusted, for example, by the thickness of the warp threads 9, the weaving method of the hollow fiber membrane fabric 8, etc.

[0033] In the hollow fiber membrane group 3, an intermembrane space S1 through which the liquid L can flow is formed between the plurality of hollow fiber membranes 31 (between adjacent hollow fiber membranes 31). The intermembrane space S1 is also formed between the plurality of hollow fiber membranes 31 in the circumferential direction of the pipe 2, and is also formed between the plurality of hollow fiber membranes 31 in the circumferential direction of the pipe 2.

[0034] The housing 4 is connected to the outer circumferential surface of the pipe 2 and accommodates the hollow fiber membrane group 3. The housing 4 is formed in a cylindrical shape extending in the extension direction D of the pipe 2. Both ends of the housing 4 in the extension direction D are airtightly connected to the outer circumferential surface of the pipe 2. The housing 4 can be connected to the pipe 2 by, for example, welding, adhesion, etc. Both ends of the pipe 2 do not have to protrude from the housing 4, but in this embodiment, from the viewpoint of facilitating connection of other members to the pipe 2, both ends of the pipe 2 protrude from the housing 4.

[0035] An intake port 41 is formed in the housing 4. The intake port 41 is an opening for drawing air from the housing 4. The intake port 41 is composed of a first intake port 42 and a second intake port 43. Each of the first intake port 42 and the second intake port 43 is an opening for drawing air from the housing 4. A suction device (not shown) such as a vacuum pump is connected to the first intake port 42 and the second intake port 43.

[0036] A liquid circulation space S2 is formed within the housing 4. The liquid circulation space S2 is a space between the hollow fiber membrane group 3 and the housing 4 through which the liquid L can flow. The liquid circulation space S2 is a space formed between the hollow fiber membrane group 3 and the housing 4 at least when the degassing module 1 is in an unused state. Therefore, when the degassing module 1 is in an unused state, the hollow fiber membrane group 3 is not in contact with the inner circumferential surface of the housing 4. After the degassing module 1 has been used, the hollow fiber membrane group 3 may come into contact with the inner circumferential surface of the housing 4 due to swelling of the multiple hollow fiber membranes 31.

[0037] The partition 5 divides the area inside the housing 4 into an inner area R1 and an outer area R2. The inner area R1 is an area including the inner circumferential space 32 of each of the hollow fiber membranes 31. The outer area R2 is an area including the intermembrane space S1. Therefore, each of the hollow fiber membranes 31 serves as a boundary between the inner area R1 and the outer area R2. Each of the hollow fiber membranes 31 prevents the liquid L from passing from the outer area R2 to the inner area R1, and allows the gas G (such as the dissolved gas in the liquid L or air bubbles contained in the liquid L) to pass from the outer area R2 to the inner area R1.

[0038] The partition 5 has a first sealing portion 51 and a second sealing portion 52. The first sealing portion 51 is disposed at a first end portion 33 on one side of the hollow fiber membrane group 3 in the extending direction D. The first end portion 33 is an end portion on the liquid supply port 21 side in the extending direction D. The first end portion 33 of the hollow fiber membrane group 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 is disposed at a second end portion 34 on the other side of the hollow fiber membrane group 3 in the extending direction D. The second end portion 34 is an end portion on the liquid discharge port 22 side in the extending direction D. The second end portion 34 of the hollow fiber membrane group 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 of, for example, resin. Examples of the resin used for the first sealing portion 51 and the second sealing portion 52 include epoxy resin, urethane resin, ultraviolet curing resin, and polyolefin resin such as polyethylene and polypropylene.

[0039] The first sealed portion 51 and the second sealed portion 52 each fill the entire area between the pipe 2 and the housing 4 except for the plurality of hollow fiber membranes 31 in an orthogonal cross section perpendicular to the extending direction D. That is, the first sealed portion 51 and the second sealed portion 52 each fill the area between the pipe 2 and the hollow fiber membrane group 3, between the plurality of hollow fiber membranes 31, and between the hollow fiber membrane group 3 and the housing 4. The inner circumferential space 32 of each of the plurality of hollow fiber membranes 31 is open from the first sealed portion 51 to the liquid supply port 21 side and is open from the second sealed portion 52 to the liquid discharge port 22 side.

[0040] The first sealing portion 51 is disposed between the hole forming portion 25 and the first hole non-forming portion 26 in the extension direction D. The second sealing portion 52 is disposed between the hole forming portion 25 and the second hole non-forming portion 27 in the extension direction D. In other words, 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 D. For this reason, the region on the liquid supply port 21 side of the first sealing portion 51 between the pipe 2 and the housing 4 becomes the internal region R1. In addition, the region on the liquid discharge port 22 side of the second sealing portion 52 between the pipe 2 and the housing 4 becomes the internal region R1.

[0041] The first intake port 42 is disposed on the opposite side of the first sealing portion 51 from the second sealing portion 52 in the extension direction D, i.e., on the liquid supply port 21 side of the first sealing portion 51 in the extension direction D. The first intake port 42 is connected to an internal region R1 located on the liquid supply port 21 side of the first sealing portion 51 between the pipe 2 and the housing 4. The second intake port 43 is disposed on the opposite side of the second sealing portion 52 from the first sealing portion 51 in the extension direction D, i.e., on the liquid discharge port 22 side of the second sealing portion 52 in the extension direction D. The second intake port 43 is connected to an internal region R1 located on the liquid discharge port 22 side of the second sealing portion 52 between the pipe 2 and the housing 4.

[0042] The baffle 6 is disposed between the first sealed portion 51 and the second sealed portion 52 in the extension direction D in order to divert the liquid L supplied to the liquid supply port 21 and bring it into contact with the multiple hollow fiber membranes 31. Here, the region of the degassing module 1 between the first sealed portion 51 and the baffle 6 in the extension direction D is referred to as the upstream portion 10, and the region of the degassing module 1 between the baffle 6 and the second sealed portion 52 in the extension direction D is referred to as the downstream portion 11.

[0043] The baffle 6 divides the intra-pipe flow path 23 and the intermembrane space S1 in the extension direction D. That is, the intra-pipe flow path 23 is divided in the extension direction D by the baffle 6. Furthermore, the intermembrane space S1 is divided in the extension direction D by the baffle 6. For this reason, the liquid L supplied to the intra-pipe flow path 23 from the liquid supply port 21 leaves the pipe 2 in the upstream section 10, passes through the intermembrane space S1, passes through the baffle clearance C1 between the baffle 6 and the housing 4, and enters the pipe 2 in the downstream section 11 through the intermembrane space S1.

[0044] The position of the baffle 6 in the extension direction D can be any position between the first sealing portion 51 and the second sealing portion 52. For example, from the viewpoint of reducing the pressure loss of the liquid L when it bypasses the baffle 6, the baffle 6 can be disposed in the center when the space between the first sealing portion 51 and the second sealing portion 52 is divided into three in the extension direction D.

[0045] The baffle 6 has an inner baffle 61 and an outer baffle 62. The inner baffle 61 is disposed on the inner periphery side of the pipe 2 and divides the intra-pipe flow path 23 in the extension direction D. The outer baffle 62 is disposed on the outer periphery side of the pipe 2 and divides at least a portion of the intermembrane space S1 in the extension direction D.

[0046] The inner baffle 61 may completely divide the in-pipe flow path 23 in the extension direction D, or may divide the in-pipe flow path 23 incompletely in the extension direction D. In other words, the inner baffle 61 may completely block the in-pipe flow path 23 so that the liquid L cannot pass from the in-pipe flow path 23 in the upstream section 10 to the in-pipe flow path 23 in the downstream section 11. The inner baffle 61 may also partially block the in-pipe flow path 23 so that the liquid L can pass from the in-pipe flow path 23 in the upstream section 10 to the in-pipe flow path 23 in the downstream section 11. Even if the inner baffle 61 partially blocks the in-pipe flow path 23, the passage of the liquid L from the in-pipe flow path 23 in the upstream section 10 to the in-pipe flow path 23 in the downstream section 11 is partially inhibited by the inner baffle 61, so that the liquid L supplied to the liquid supply port 21 can be diverted and brought into contact with the plurality of hollow fiber membranes 31.

[0047] The inner baffle 61 is formed of, for example, a resin. Examples of the resin used for the inner baffle 61 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, and imide-modified ABS resin. Examples of the thermoplastic resins include polystyrene-based resins such as styrene-acrylonitrile copolymer (SAN) resin and acrylonitrile-ethylene-propylene-diene-styrene (AES) resin; olefin-based resins such as polyethylene (PE) resin, polypropylene (PP) resin, polymethylpentene (PMP) resin and cycloolefin resin; cellulose-based resins such as nitrocellulose and cellulose acetate; silicone-based resins; fluorine-based resins; polyphenylene ether (PPE) resin; epoxy (EPOXY) resins such as bisphenol A epoxy resin, bisphenol F epoxy resin, isocyanurate epoxy resin and hydantoin epoxy resin; amino resins such as melamine resin and urea resin; phenolic resins; and thermosetting resins such as unsaturated polyester resin. Of these, PP, PE, EPOXY, PC, ABS, PPE, PMMA, PMP and PU are preferred.

[0048] The outer baffle 62 may completely separate the intermembrane space S1 in the extending direction D, or may incompletely separate the intermembrane space S1 in the extending direction D. In other words, the outer baffle 62 may completely close the intermembrane space S1 so that the liquid L cannot pass from the intermembrane space S1 in the upstream section 10 to the intermembrane space S1 in the downstream section 11. The outer baffle 62 may also partially close the intermembrane space S1 so that the liquid L can pass from the intermembrane space S1 in the upstream section 10 to the intermembrane space S1 in the downstream section 11. Even if the outer baffle 62 partially closes the intermembrane space S1, the passage of the liquid L from the intermembrane space S1 in the upstream section 10 to the intermembrane space S1 in the downstream section 11 is partially inhibited by the outer baffle 62, so that the liquid L supplied to the liquid supply port 21 can be bypassed and brought into contact with the plurality of hollow fiber membranes 31.

[0049] The outer baffle 62 is spaced apart from the housing 4. However, as long as a baffle clearance C1 is formed even partially between the outer baffle 62 and the housing 4, the outer baffle 62 may be in contact with the housing 4. In addition, the outer baffle 62 is not disposed in the liquid flow space S2, but as long as a baffle clearance C1 is formed even partially between the outer baffle 62 and the housing 4, the outer baffle 62 may be disposed in the liquid flow space S2.

[0050] The outer baffle 62 is formed of, for example, a resin. Examples of the resin used for the outer baffle 62 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, and imide-modified ABS resin. Examples of such resins include polystyrene-based resins such as styrene-acrylonitrile copolymer (SAN) resin and acrylonitrile-ethylene-propylene-diene-styrene (AES) resin; olefin-based resins such as polyethylene (PE) resin, polypropylene (PP) resin, polymethylpentene (PMP) resin and cycloolefin resin; cellulose-based resins such as nitrocellulose and cellulose acetate; silicone-based resins; fluorine-based resins; thermoplastic resins such as polyphenylene ether (PPE) resin; epoxy (EPOXY) resins such as bisphenol A type epoxy resin, bisphenol F type epoxy resin, isocyanurate type epoxy resin and hydantoin type epoxy resin; amino-based resins such as melamine type resin and urea resin; phenol-based resins; and thermosetting resins such as unsaturated polyester type resin. Of these, PP, PE, PVC, EPOXY, PMP and PU are preferred.

[0051] The support part 7 is disposed on the liquid outlet 22 side of the baffle 6 in the extending direction D, and supports at least a part of the hollow fiber membranes 31 against the pipe 2. In the downstream part 11, the flow of the liquid L entering the pipe 2 presses the hollow fiber membranes 31 against the pipe 2, and the hollow fiber membranes 31 on the outer periphery side slip between the hollow fiber membranes 31 on the inner periphery side, narrowing the intermembrane space S1 that serves as a flow path for the liquid L. This tendency becomes stronger when each of the hollow fiber membranes 31 is a heterogeneous membrane having a dense layer or has an outer diameter of 500 μm or less, 350 μm or less, or 250 μm or less. Therefore, in the downstream part 11, the support part 7 supports at least a part of the hollow fiber membranes 31 against the pipe 2 so as to resist the flow of the liquid L entering the pipe 2.

[0052] The support part 7 may support all of the plurality of hollow fiber membranes 31 relative to the pipe 2, or may support only a portion of the plurality of hollow fiber membranes 31 relative to the pipe 2. In this embodiment, the support part 7 supports all of the plurality of hollow fiber membranes 31 relative to the pipe 2, from the viewpoint of further suppressing narrowing of the intermembrane space S1.

[0053] The support part 7 may have any shape, structure, etc., as long as it can support at least a part of the hollow fiber membranes 31. For example, the support part 7 is directly or indirectly connected to at least a part of the hollow fiber membranes 31 and the pipe 2. The support part 7 being indirectly connected to at least a part of the hollow fiber membranes 31 and the pipe 2 may mean, for example, that another member is disposed between the support part 7 and at least a part of the hollow fiber membranes 31 and the pipe 2. The support part 7 may also fill the entire area between the pipe 2 and the hollow fiber membrane group 3, and the entire area of ​​the intermembrane space S1. The support part 7 may also fill only the area between the pipe 2 and a part of the hollow fiber membrane group 3, and a part of the intermembrane space S1.

[0054] The support part 7 is spaced apart from the housing 4, and a support part clearance C2 is formed between the support part 7 and the housing 4. However, the support part 7 may be in contact with the housing 4 as long as the movement of the liquid L from the liquid supply port 21 side (the baffle 6 side) to the liquid discharge port 22 side (the second hole non-forming portion 27 side) of the support part 7 is not prevented, or as long as the support part clearance C2 is formed even in a portion between the support part 7 and the housing 4. In this embodiment, the support part 7 is spaced apart from the housing 4 from the viewpoints of reducing the pressure loss of the liquid L and lengthening the contact time between the plurality of hollow fiber membranes 31 and the liquid L.

[0055] The support part 7 is not disposed in the liquid circulation space S2. However, if the movement of the liquid L from the liquid supply port 21 side (the baffle 6 side) to the liquid discharge port 22 side (the second hole non-formed portion 27 side) of the support part 7 is not prevented, or if a support part clearance C2 is formed even partially between the support part 7 and the housing 4, the support part 7 may be disposed in the liquid circulation space S2. In this embodiment, from the viewpoints of reducing the pressure loss of the liquid L and lengthening the contact time between the plurality of hollow fiber membranes 31 and the liquid L, the support part 7 is not disposed in the liquid circulation space S2.

[0056] The multiple holes 24 of the pipe 2 may be formed on both the liquid supply port 21 side (baffle 6 side) of the support part 7 in the extension direction D and the liquid discharge port 22 side (second hole non-forming portion 27 side) of the support part 7 in the extension direction D, or may be formed on only one side. In this embodiment, from the viewpoint of improving the degassing performance of the liquid L, the multiple holes 24 of the pipe 2 are formed on both the liquid supply port 21 side (baffle 6 side) of the support part 7 in the extension direction D and the liquid discharge port 22 side (second hole non-forming portion 27 side) of the support part 7 in the extension direction D.

[0057] The position of the support part 7 in the extension direction D can be any position between the baffle 6 and the second hole-free part 27. For example, from the viewpoint of efficiently supporting a plurality of hollow fiber membranes 31, the support part 7 can be disposed in the center when the space between the baffle 6 and the second hole-free part 27 is divided into three in the extension direction D.

[0058] The support portion 7 is formed of, for example, a resin. Examples of the resin used for the support portion 7 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, imide-modified ABS resin, Examples of suitable resins include polystyrene-based resins such as styrene-acrylonitrile copolymer (SAN) resin and acrylonitrile-ethylene-propylene-diene-styrene (AES) resin; olefin-based resins such as polyethylene (PE) resin, polypropylene (PP) resin, polymethylpentene (PMP) resin, and cycloolefin resin; cellulose-based resins such as nitrocellulose and cellulose acetate; silicone-based resins; fluorine-based resins; thermoplastic resins such as polyphenylene ether (PPE) resin; epoxy (EPOXY) resins such as bisphenol A epoxy resin, bisphenol F epoxy resin, isocyanurate epoxy resin, and hydantoin epoxy resin; amino resins such as melamine resin and urea resin; phenolic resins; and thermosetting resins such as unsaturated polyester resin. Of these, PP, PE, PVC, EPOXY, PMP, and PU are preferred.

[0059] 7 and 8 are schematic cross-sectional views for explaining an example of a method for forming the baffle 6 and the support part 7. When forming the baffle 6 and the support part 7, first, as shown in Fig. 7, a resin disc-shaped member 12 is fitted into the inner-pipe flow path 23 of the pipe 2. This disc-shaped member becomes the inner baffle 61.

[0060] Next, as shown in FIG. 7 and FIG. 8, the hollow fiber membrane fabric 8 is wound around the pipe 2 so as to cover the holes 24 of the pipe 2. As described above, 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. At this time, when the surface of the hollow fiber membrane fabric 8 that is wound around the pipe 2 is the inner fabric surface 8a, the first molten resin 13 is applied to a position corresponding to the outer baffle 62 on the inner fabric surface 8a, and the second molten resin 14 is applied to a position corresponding to the support portion 7 on the inner fabric surface 8a. Then, the hollow fiber membrane fabric 8 to which the first molten resin 13 and the second molten resin 14 are applied is wound around the pipe 2. Then, the first molten resin 13 and the second molten resin 14 are 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 are filled in the positions corresponding to the outer baffle 62 and the support portion 7. Thereafter, the first molten resin 13 and the second molten resin 14 harden, so that the first molten resin 13 becomes the outer baffle 62 and the second molten resin 14 becomes the support portion 7.

[0061] Next, a method for degassing the liquid L using the degassing module 1 will be described.

[0062] The internal region R1 is sucked through the first intake port 42 and the second intake port 43, and liquid L is supplied to the pipe inner flow path 23 through the liquid supply port 21. The internal region R1 can be sucked through the first intake port 42 and the second intake port 43, for example, by connecting a suction device (not shown) such as a vacuum pump to the first intake port 42 and the second intake port 43 and operating the suction device. Then, by sucking the internal region R1 through the first intake port 42 and the second intake port 43, the internal region R1 including the inner circumferential space 32 of each of the plurality of hollow fiber membranes 31 is brought into a depressurized state.

[0063] Then, the liquid supplied to the pipe flow path 23 exits the pipe 2 through the multiple holes 24 formed in the pipe 2 at the upstream portion 10, bypassing the baffle 6, and passes through the intermembrane space S1. At this time, since the inner circumferential space 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, thereby degassing the liquid L. Thereafter, the liquid L passes through the baffle clearance C1, passes through the intermembrane space S1 at the downstream portion 11, and enters the pipe 2 through the multiple holes 24 formed in the pipe 2. At this time, since the inner circumferential space 32 of each of the multiple hollow fiber membranes 31 is also 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, thereby degassing the liquid L. Thereafter, the degassed liquid L that entered the pipe 2 is discharged from the liquid outlet 22.

[0064] In this way, in the degassing module 1 according to this embodiment, the internal region R1 is sucked in through the first intake port 42 and the second intake port 43, and the liquid L is supplied from the liquid supply port 21 to the pipe flow path 23, so that the liquid L can be degassed. The pipe flow path 23 and the intermembrane space S1 are partitioned in the extension direction D by the baffle 6. Therefore, when the liquid L is supplied from the liquid supply port 21 to the pipe flow path 23, the liquid L leaves the pipe 2 on the liquid supply port 21 side of the baffle 6, passes through the intermembrane space S1, passes through the baffle clearance C1 between the baffle 6 and the housing 4, passes through the intermembrane space S1, and re-enters the pipe 2 on the liquid outlet 22 side of the baffle 6. In this way, by making the flow of the liquid L complicated by the baffle 6, the degassing performance can be improved compared to the case where the baffle 6 is not provided.

[0065] Here, on the liquid outlet 22 side of the baffle 6, the plurality of hollow fiber membranes 31 are pressed toward the pipe 2 by the flow of the liquid L that crosses the baffle 6 and re-enters the pipe 2. However, on the liquid outlet 22 side of the baffle 6, which is the downstream side of the baffle 6, a support part 7 is arranged to support at least a part of the plurality of hollow fiber membranes 31 relative to the pipe 2. This prevents the hollow fiber membranes 31 on the outer periphery from slipping between the hollow fiber membranes 31 on the inner periphery, etc., due to the flow of the liquid L that crosses the baffle 6 and re-enters the pipe 2, thereby preventing the intermembrane space S1, which serves as a flow path for the liquid L, from becoming narrower. This makes it possible to reduce the pressure loss of the liquid L compared to when the support part 7 is not arranged.

[0066] Furthermore, in this degassing module 1, the support portion 7 supports all of the multiple hollow fiber membranes 31 relative to the pipe 2, thereby further preventing the intermembrane space S1, which serves as a flow path for the liquid L, from being narrowed by the flow of the liquid L passing over the baffle 6 and re-entering the pipe 2.

[0067] Furthermore, in this degassing module 1, since the support part 7 is separated from the housing 4, the liquid L that has passed over the baffle 6 can flow along the inner circumferential surface of the housing 4 until it passes over the support part 7. This makes it possible to expand the area where the liquid L comes into contact with the plurality of hollow fiber membranes 31 on the liquid outlet 22 side of the support part 7, which is the downstream side of the support part 7.

[0068] Furthermore, in this degassing module 1, since the baffle 6 is spaced apart from the housing 4, the pressure loss of the liquid L when the liquid L passes through the baffle clearance C1 between the baffle 6 and the housing 4 can be reduced.

[0069] Furthermore, in this degassing module 1, the baffle 6 separates the entire intermembrane space S1 in the extending direction D, so that the liquid L coming out of the pipe 2 can flow to the outside of the hollow fiber membrane group 3 on the liquid supply port 21 side of the baffle 6, which is the upstream side of the baffle 6. This makes it possible to lengthen the contact time between the plurality of hollow fiber membranes 31 and the liquid L, thereby improving the degassing efficiency of the liquid L.

[0070] In addition, in this degassing module 1, since a liquid circulation space S2 is formed between the hollow fiber membrane group 3 and the housing 4, the liquid L coming out of the pipe 2 can pass through the intermembrane space S1 and enter the liquid circulation space S2, and then pass from the liquid circulation space S2 through the intermembrane space S1 and enter the pipe 2. Therefore, the pressure loss of the liquid L can be reduced while the liquid L is brought into contact with the plurality of hollow fiber membranes 31.

[0071] Furthermore, in this degassing module 1, since the support part 7 is not disposed in the liquid flow space S2, the pressure loss of the liquid L passing through the liquid flow space S2 can be reduced compared to when the support part 7 is disposed in the liquid flow space S2.

[0072] Furthermore, in this degassing module 1, the baffle 6 has an inner baffle 61 arranged on the inner side of the pipe 2 and an outer baffle 62 arranged on the outer side of the pipe 2, so that the baffle 6 can be arranged without dividing the pipe 2 in the extension direction D.

[0073] In this degassing module 1, the first sealed portion 51 and the second sealed portion 52 each fill the entire area between the pipe 2 and the housing 4 in an orthogonal cross section perpendicular to the extension direction D, except for the plurality of hollow fiber membranes 31, and the plurality of holes 24 in the pipe 2 are formed between the first sealed portion 51 and the second sealed portion 52. Therefore, the first sealed portion 51 and the second sealed portion 52 can partition the area inside the housing 4 into an inner area R1 and an outer area R2. Since the first sealed portion 51 and the second sealed portion 52 are disposed at the first end 33 and the second end 34 of the hollow fiber membrane group 3 in the extension direction D, the liquid L can be brought into contact with the plurality of hollow fiber membranes 31 over a long range in the extension direction D.

[0074] In addition, in this degassing module 1, the first air intake 42 and the second air intake 43 are formed outside the first sealed portion 51 and the second sealed portion 52 in the extending direction D, so that air can be sucked into the inner circumferential space 32 of each of the hollow fiber membranes 31 from both ends of the hollow fiber membranes 31. This can improve the degassing efficiency of the liquid L.

[0075] Moreover, in the liquid degassing method according to this embodiment, the liquid L is degassed using the above-mentioned degassing module 1, so that the pressure loss of the liquid L can be reduced.

[0076] Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, in the above embodiment, the pipe and the housing are described as separate members, but the pipe and the housing may be integrated as long as there is no problem in manufacturing. EXAMPLES

[0077] Next, examples of the present invention will be described, but the present invention is not limited to the following examples.

[0078] (Experiment 1) In Experiment 1, the pressure loss of the liquid was measured using the degassing module of Comparative Example 1, which does not have a support part. The degassing module of Comparative Example 1 was similar to the degassing module 1 according to the embodiment, except that it did not have a support part. In Experiment 1, the flow rate of the liquid supplied to the degassing module was changed, and the pressure loss of the liquid was measured at three locations: the upstream portion, the baffle clearance between the baffle and the housing, and the downstream portion. The measurement results are shown in FIG. 9. FIG. 9 is a graph showing the measurement results of the pressure loss in Comparative Example 1.

[0079] As shown in Figure 9, the pressure loss of the liquid was much larger in the upstream and downstream sections than the baffle clearance between the baffle and the housing. Also, the pressure loss of the liquid was much larger in the downstream section than in the upstream section. From these results, it is considered that in the downstream section, the flow of liquid entering the pipe presses the hollow fiber membranes against the pipe, causing the hollow fiber membranes on the outer periphery to slip between the hollow fiber membranes on the inner periphery, narrowing the intermembrane space, and as a result, the pressure loss of the liquid was high.

[0080] (Experiment 2) In Experiment 2, the pressure loss of the liquid was measured using the degassing module of Comparative Example 1 and the degassing module of Example 1. The degassing module of Example 1 was the same as the degassing module 1 according to the above-mentioned embodiment. In Experiment 2, the flow rate of the liquid supplied to the degassing module was changed, and the pressure loss of the liquid from the liquid supply port to the liquid discharge port of the degassing module was measured. The measurement results are shown in FIG. 10. FIG. 10 is a graph showing the measurement results of the pressure loss in Example 1 and Comparative Example 1.

[0081] As shown in Fig. 10, the pressure loss of the liquid in the degassing module of Example 1 having a support portion is significantly smaller than that in the degassing module of Comparative Example 1 having no support portion. 3 / h, the liquid pressure loss in the degassing module of Example 1 was reduced by 60% or more compared to the liquid pressure loss in the degassing module of Comparative Example 1. From these results, it is considered that the provision of a support part can reduce the liquid pressure loss. [Explanation of symbols]

[0082] 1... degassing module, 2... pipe, 3... hollow fiber membrane group, 4... housing, 5... partition section, 6... baffle, 7... support section, 8... hollow fiber membrane fabric, 8a... fabric inner surface, 9... warp yarn, 10... upstream section, 11... downstream section, 12... disk-shaped member, 13... first molten resin, 14... second molten resin, 21... liquid supply port, 22... liquid discharge port, 23... pipe inner flow path, 24... hole, 25... hole forming section, 26... first hole non-forming section, 27... second hole non-forming section, 31...hollow fiber membrane, 32...inner space, 33...first end, 34...second end, 41...air intake, 42...first air intake, 43...second air intake, 51...first sealing portion, 52...second sealing portion, 61...inner baffle, 62...outer baffle, A...central axis, D...extension direction, G...gas, L...liquid, R1...inner region, R2...outer region, S1...intermembrane space, S2...liquid flow space, C1...baffle clearance, C2...support clearance.

Claims

1. a pipe that defines an internal flow path having a liquid supply port and a liquid discharge port and has a plurality of holes that open the internal flow path; a hollow fiber membrane group including a plurality of hollow fiber membranes arranged on an outer circumferential side of the pipe so as to cover the plurality of holes; a housing connected to an outer peripheral surface of the pipe and accommodating the hollow fiber membrane group; a partition that divides the region within the housing into an internal region including an inner peripheral space of each of the plurality of hollow fiber membranes and an external region including an inter-membrane space between the plurality of hollow fiber membranes; an air inlet of the housing communicating with the interior region; a baffle that divides the pipe inner flow path and the inter-membrane space in the extending direction of the pipe; a support portion disposed on the liquid outlet side of the baffle in the extension direction and supporting at least a part of the plurality of hollow fiber membranes with respect to the pipe, At the same position as the support portion in the extension direction, the pipe inner flow path is not partitioned in the extension direction. Degassing module.

2. The support portion supports all of the hollow fiber membranes relative to the pipe. The degassing module of claim 1 .

3. The support is spaced apart from the housing. The degassing module of claim 1 .

4. The baffle is spaced from the housing. The degassing module of claim 1 .

5. The baffle partitions all of the inter-membrane spaces in the extending direction. The degassing module of claim 1 .

6. A liquid flow space through which a liquid can flow is formed between the hollow fiber membrane group and the housing. The degassing module of claim 1 .

7. The support portion is not disposed in the liquid flow space. The degassing module according to claim 6.

8. The baffle is an inner baffle disposed on an inner circumferential side of the pipe to divide the pipe inner flow passage in the extending direction; and an outer baffle disposed on the outer circumferential side of the pipe to divide the inter-membrane space in the extending direction. The degassing module of claim 1 .

9. The partition portion is a first sealing portion disposed at a first end portion on one side of the hollow fiber membrane group in the extension direction; a second sealing portion disposed at a second end portion on the other side of the hollow fiber membrane group in the extension direction, each of the first sealing portion and the second sealing portion fills an entire area between the pipe and the housing except for the plurality of hollow fiber membranes in an orthogonal cross section perpendicular to the extension direction; The plurality of holes of the pipe are formed between the first sealing portion and the second sealing portion in the extension direction. The degassing module of claim 1 .

10. The intake port is a first intake port formed on a side of the first sealing portion opposite to the second sealing portion in the extending direction; a second intake port formed on a side of the second sealing portion opposite to the first sealing portion in the extending direction, 10. The degassing module of claim 9.

11. Each of the plurality of hollow fiber membranes constituting the hollow fiber membrane group extends from the first sealing portion to the second sealing portion.

10. The degassing module of claim 9.

12. The support portion is disposed between the baffle and the second sealing portion. The degassing module of claim 11.

13. 13. The degassing module according to claim 1, wherein the internal region is sucked through the intake port, and liquid is supplied through the liquid supply port to the pipe internal flow path. How to degas a liquid.

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