Classifications

• • 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
  • B01D63/06—Tubular membrane modules
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
  • B01D69/12—Composite membranes; Ultra-thin membranes

Definitions

• This disclosure relates to a tube unit in which the ends of multiple tubes are bundled together, a degassing module equipped with the tube unit, and a degassing method.
• Patent Document 1 describes a tube unit and a degassing module.
• the tube unit includes multiple tubes and a bundling section that bundles the ends of the multiple tubes. At least one of the ends of each of the multiple tubes has a cylindrical section that extends in the direction the tube extends and a protruding section that protrudes radially outward from the cylindrical section.
• the degassing module comprises the above-mentioned tube unit and a housing in which the tube unit is housed.
• Each of the multiple tubes is a tubular membrane that is permeable to gas but not liquid.
• the housing has a first opening and a second opening that communicate with the internal space of each of the multiple tubes, and an air intake port that communicates with the space outside the multiple tubes.
• one of the aforementioned tubes is known to have a homogeneous membrane structure.
• This tube is a hollow degassing membrane with a certain thickness.
• this type of degassing membrane is less likely to leak liquid, there is room for improvement in terms of gas permeability. Therefore, there is a need to make it less likely to leak liquid while also increasing gas permeability.
• the tube unit according to the present disclosure comprises a plurality of tubes, a first bundling section bundling one ends of the plurality of tubes, and a second bundling section bundling the other ends of the plurality of tubes.
• Each of the plurality of tubes is composed of a plurality of layers arranged along the radial direction of the tube.
• the plurality of layers includes a porous layer and a non-porous layer that is permeable to gas but not to liquid.
• each tube is composed of multiple layers.
• the multiple layers include a porous layer and a non-porous layer.
• the non-porous layer is aligned radially with the porous layer and is permeable to gas but not liquid.
• the gas permeability of the porous layer can be increased.
• the non-porous layer aligned radially with the porous layer can be formed as a thin film. Therefore, by forming the non-porous layer as a thin film, the non-porous layer is less likely to leak liquid and has increased gas permeability.
• the non-porous layer may be located radially outside the porous layer.
• the non-porous layer is located radially outside the porous layer. Therefore, particularly in an external perfusion system in which liquid flows outside the tube, the thin non-porous layer can prevent liquid leakage and increase gas permeability.
• the non-porous layer may be located radially inward of the porous layer.
• the non-porous layer is located radially inward of the porous layer. Therefore, particularly in an internal perfusion system in which liquid flows inside the tube, the thin non-porous layer can prevent liquid leakage and increase gas permeability.
• the non-porous layer may be located both radially outside and radially inside the porous layer.
• the non-porous layer is located both radially outside and inside the porous layer. Therefore, in both the external perfusion method and the internal perfusion method, it is possible to prevent liquid leakage and increase gas permeability.
• the degassing module includes the aforementioned tube unit and a housing that houses the tube unit.
• the housing has a first opening and a second opening that communicate with the internal space of the multiple tubes, and an air intake port that communicates with the space outside the multiple tubes inside the housing.
• This degassing module includes the aforementioned tube unit. Therefore, this degassing module provides the same effects as the aforementioned tube unit.
• the housing may be made of stainless steel.
• the housing being made of stainless steel can increase the durability of the housing.
• the housing may have a first passage extending from the first opening into the interior of the housing, and a second passage extending from the second opening into the interior of the housing. At least a portion of the first binding part may extend into the first passage, and at least a portion of the second binding part may extend into the second passage.
• the degassing module may include a first metal ring disposed in the first passage and having a hole through which the first binding part is passed, and a second metal ring disposed in the second passage and having a hole through which the second binding part is passed.
• the degassing module has the first metal ring disposed in the first passage and through which the first binding part is passed, and the second metal ring disposed in the second passage and through which the second binding part is passed. This makes it possible to prevent liquid leakage and increase durability.
• the degassing method according to the present disclosure degasses the liquid that has entered the internal space of the multiple tubes through the first opening of the degassing module described above.
• This degassing method uses the degassing module described above. Therefore, this degassing method achieves the same effects as the degassing module described above.
• This disclosure makes it possible to reduce liquid leakage and increase gas permeability.
• FIG. 1 is a schematic cross-sectional view showing an example of a degassing module.
• FIG. 2 is a schematic perspective view showing an example of a tube unit.
• FIG. 3 is a schematic end view showing an example of a tube unit.
• FIG. 4 is a schematic cross-sectional view taken along line AA shown in FIG.
• FIG. 5 is a schematic cross-sectional view showing an example of a tube.
• FIG. 6 is a schematic cross-sectional view showing a modified example of the degassing module.
• FIG 1 is a schematic cross-sectional view showing an example of a degassing module.
• the degassing module 1 comprises a tube unit 3 in which multiple tubes 2 are bundled together, and a housing 4 that houses the tube unit 3.
• the multiple tubes 2 divide the interior of the housing 4 into a first region, which is the internal space 2a of each of the multiple tubes 2 (see Figure 4), and a second region, which is the space 4b outside the multiple tubes 2.
• the first region is the region where the liquid is supplied, and the second region is the region where the gas is sucked in.
• the degassing module 1 degasses the liquid by supplying the liquid to the internal space 2a (first region) of each of the multiple tubes 2 and sucking the gas from the space 4b (second region) outside the multiple tubes 2.
• the liquid to be degassed is not particularly limited, but may be, for example, an organic solvent or water.
• Tube 2 is a tubular hollow fiber membrane that is permeable to gases but not liquids.
• Tube 2 is made of, for example, a fluorine membrane.
• materials for tube 2 include polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-ethylene copolymer (ethylene copolymer resin) (ETFE), polychlorotrifluoroethylene (PCTFE), amorphous fluoropolymer (non-crystalline fluororesin; AF), fluororesins such as polyvinylidene fluoride (PVDF), polypropylene (PP), polymethylpentene (PMP), silicone, polyimide, or polyamide.
• amorphous fluoropolymers include Teflon (registere
• Figure 2 is a schematic perspective view showing an example of a tube unit.
• Figure 3 is a schematic end view showing an example of a tube unit.
• Figure 4 is a cross-sectional view taken along line A-A in Figure 3. Note that Figures 2 and 3 illustrate a case in which the tube unit 3 is composed of seven tubes 2. However, the number of tubes 2 is not particularly limited.
• the tube unit 3 has a bundling section 5 that bundles the multiple tubes 2.
• the bundling section 5 includes a first bundling section 5A that bundles one end of the multiple tubes 2 and a second bundling section 5B that bundles the other ends of the multiple tubes 2.
• the tube unit 3 includes multiple tubes 2, a first bundling section 5A that bundles one end of the multiple tubes 2, and a second bundling section 5B that bundles the other ends of the multiple tubes 2.
• the first binding portion 5A and the second binding portion 5B are attached to the housing 4.
• the configuration of the first binding portion 5A is the same as the configuration of the second binding portion 5B. Therefore, in the following description, when there is no need to distinguish between the first binding portion 5A and the second binding portion 5B, the first binding portion 5A and the second binding portion 5B will be collectively described as the binding portion 5. Note that the configuration of the first binding portion 5A may be different from the configuration of the second binding portion 5B.
• the bundling section 5 comprises an outer tube 6 into which the ends of each of the multiple tubes 2 are inserted, and a sealing section 7 filled between the outer tube 6 and the ends of each of the multiple tubes 2.
• the outer tube 6 is the outermost layer of the bundling section 5.
• the outer tube 6 is, for example, cylindrical in shape.
• the outer tube 6 is the part that is attached to the housing 4.
• the outer tube 6 is made of, for example, a fluororesin such as PFA or PTFE.
• the sealing portion 7 bundles the ends of the multiple tubes 2 and seals the gap between the ends of the multiple tubes 2 and the outer tube 6.
• the sealing portion 7 does not fill the internal space 2a of each of the multiple tubes 2.
• the sealing portion 7 fills the gap between the multiple tubes 2 and the gap between the tube 2 and the outer tube 6. Only the internal space 2a of each of the multiple tubes 2 is open from the end face of the sealing portion 7.
• the sealing portion 7 is made of a fluororesin such as FEP or PFA, for example.
• Each of the multiple tubes 2 is composed of multiple layers 20 arranged along the radial direction of each tube 2.
• “Radial direction” refers to the direction toward the axis of the tube in a plane perpendicular to the direction in which the tube extends, or the direction away from that axis.
• “Radial outer side” refers to the radial direction away from the axis, and “radial inner side” refers to the radial direction toward the axis.
• the multiple layers 20 include a porous layer 21 and a non-porous layer 22 that is permeable to gas but not liquid. The porous layer 21 and non-porous layer 22 will be described in detail below.
• Each end of the multiple tubes 2 bound to the sealing portion 7 has a tubular portion 2b and a protruding portion 2c protruding from the tubular portion 2b.
• the tubular portion 2b is formed, for example, by a cylindrically extending portion extending in the extension direction of the tube 2.
• the protruding portion 2c is a portion that protrudes radially outward from the tubular portion 2b.
• the protruding portion 2c may be, for example, a thickened portion (a bulging portion) at a portion of each end of the multiple tubes 2, or a portion of each end of the multiple tubes 2 that is curved as if pinched.
• the wall is thickened at the protruding portion 2c.
• the direction in which the protrusions 2c protrude may be constant (constant) depending on the position in the extension direction of the tube 2, or may vary depending on the position in the extension direction of the tube 2.
• the protrusions 2c may be formed over the entire end of the tube 2 along the extension direction of the tube 2, or may be formed partially or intermittently along the extension direction of the tube 2.
• multiple tubular portions 2b may be arranged in a close-packed structure, and protrusions 2c may be arranged in the gaps formed between the multiple tubular portions 2b.
• the housing 4 has a housing main body 11 and a lid portion 12.
• the housing 4 is made of stainless steel.
• the housing 4 does not have to be made of stainless steel and may be made of resin, for example.
• the durability of the housing 4 can be improved compared to when the housing 4 is made of resin.
• the lid portion 12 is hermetically joined to the housing body 11 to close the opening 11d of the housing body 11.
• the lid portion 12 is joined to the housing body 11 by, for example, welding, screwing, or fitting.
• the housing body 11 and the lid portion 12 may also be integrated.
• the housing 4 has a first opening 13 and a second opening 14 that communicate with the internal space 2a of the multiple tubes 2, and an air intake 15 that communicates with the space 4b outside the multiple tubes 2 inside the housing 4.
• the housing main body 11 has a protrusion 11f that protrudes from the bottom 11b to the outside of the housing main body 11, and the air intake 15 is formed in the protrusion 11f.
• the lid portion 12 has, for example, a main body portion 12b, a first protrusion 12c that protrudes from the main body portion 12b toward the opposite side of the housing main body 11, and a second protrusion 12d that protrudes from the main body portion 12b toward the opposite side of the housing main body 11 at a position different from the first protrusion 12c.
• the first protrusion 12c and the second protrusion 12d are cylindrical.
• the first opening 13 is formed at the end of the first protrusion 12c opposite the housing main body 11, and the second opening 14 is formed at the end of the second protrusion 12d opposite the housing main body 11.
• the housing 4 has a first passage 16 extending from the first opening 13 into the interior of the housing 4, and a second passage 17 extending from the second opening 14 into the interior of the housing 4.
• the first passage 16 is formed inside the first protrusion 12c
• the second passage 17 is formed inside the second protrusion 12d.
• the first passage 16 is defined by a first inner wall 16b extending from the first opening 13, a second inner wall 16c extending from the first inner wall 16b on the side opposite the first opening 13, and a third inner wall 16d extending from the second inner wall 16c on the side opposite the first inner wall 16b.
• the first inner wall 16b extends from the first opening 13 toward the housing body 11.
• the first opening 13 is defined by, for example, the first inner wall 16b.
• a first pipe 18b that communicates with each internal space 2a of the multiple tubes 2 is joined to the first opening 13.
• the first pipe 18b is joined to the first opening 13 by, for example, welding, screwing, or fitting.
• the first binding portion 5A extends into the first passage 16.
• the first binding portion 5A is airtightly joined to the first passage 16. That is, the first binding portion 5A of the tube unit 3 is airtightly connected to the housing 4.
• the first binding portion 5A is joined to the housing 4 (e.g., the first passage 16) by, for example, welding, screwing, or fitting.
• the width (e.g., diameter) of the second inner wall 16c is smaller than the width of the first inner wall 16b.
• the first binding portion 5A is fixed to the second inner wall 16c.
• the third inner wall 16d includes, for example, an inclined surface 16f extending from the second inner wall 16c, and an extending surface 16h extending from the end of the inclined surface 16f opposite the second inner wall 16c to the space 4b.
• the inclined surface 16f is inclined relative to the second inner wall 16c so as to widen as it moves away from the second inner wall 16c.
• the degassing module 1 has a first ferrule 23A, a first metal ring 24A, and a first set screw 25A.
• the first ferrule 23A is made of, for example, resin.
• the first ferrule 23A has, for example, a cylindrical portion 23b and an inclined cylindrical portion 23c that expands in diameter from the cylindrical portion 23b and decreases in diameter as it moves away from the cylindrical portion 23b.
• the first ferrule 23A is cylindrical.
• the first binding portion 5A is inserted into the first ferrule 23A.
• the first binding portion 5A inserted into the first ferrule 23A is fixed to the housing 4.
• the inclined cylindrical portion 23c of the first ferrule 23A is in close contact with the inclined surface 16f of the first passage 16.
• the first metal ring 24A has a hole 24d through which the first binding portion 5A is passed.
• the first metal ring 24A has, for example, an annular portion 24b through which the first binding portion 5A is passed, and a cylindrical portion 24c into which the first ferrule 23A is inserted.
• a hole 24d is formed in each of the annular portion 24b and the cylindrical portion 24c.
• the first binding portion 5A which is threaded through the annular portion 24b, is threaded through the first ferrule 23A.
• the inner diameter of the annular portion 24b is smaller than the inner diameter of the tubular portion 24c.
• the first binding portion 5A is in close contact with the inner surface of the annular portion 24b, and the first ferrule 23A (e.g., tubular portion 23b) is in close contact with the inner surface of the tubular portion 24c.
• the first set screw 25A is cylindrical.
• the first binding portion 5A is passed through the first set screw 25A.
• the first binding portion 5A which is passed through the first set screw 25A, is passed through the first metal ring 24A and the first ferrule 23A.
• the first set screw 25A is screwed into the first passage 16 (e.g., the third inner wall 16d) with the first ferrule 23A and the first metal ring 24A, through which the first binding portion 5A is inserted, inserted into the first passage 16.
• the second passage 17 is defined by a first inner wall 17b extending from the second opening 14, a second inner wall 17c extending from the first inner wall 17b on the side opposite the second opening 14, and a third inner wall 17d extending from the second inner wall 17c on the side opposite the first inner wall 17b.
• the configurations of the first inner wall 17b, the second inner wall 17c, and the third inner wall 17d are the same as the configurations of the first inner wall 16b, the second inner wall 16c, and the third inner wall 16d described above.
• the third inner wall 17d includes, for example, an inclined surface 17f extending from the second inner wall 17c and an extending surface 17h extending from the end of the inclined surface 17f opposite the second inner wall 17c to the space 4b.
• the second opening 14 is defined by the first inner wall 17b.
• a second pipe 18c is joined to the second opening 14, and communicates with the internal space 2a of each of the multiple tubes 2.
• the second pipe 18c is joined to the second opening 14 by, for example, welding, screwing, or fitting.
• At least a portion of the second binding portion 5B extends into the second passage 17.
• the manner in which the second binding portion 5B is joined to the second passage 17 is the same as the manner in which the first binding portion 5A is joined to the first passage 16, for example.
• the degassing module 1 has a second ferrule 23B, a second metal ring 24B, and a second set screw 25B.
• the configurations of the second ferrule 23B, the second metal ring 24B, and the second set screw 25B are the same as the configurations of the first ferrule 23A, the first metal ring 24A, and the first set screw 25A described above.
• descriptions of the second ferrule 23B, the second metal ring 24B, and the second set screw 25B that overlap with the above descriptions will be omitted as appropriate, with the same reference numerals used.
• the second binding portion 5B is inserted into the second ferrule 23B.
• the second binding portion 5B inserted into the second ferrule 23B is fixed to the housing 4.
• the second metal ring 24B has a hole 24f through which the second binding portion 5B passes.
• the second metal ring 24B has, for example, an annular portion 24b and a tubular portion 24c.
• the second binding portion 5B, which is inserted into the annular portion 24b, is passed through the second ferrule 23B.
• the second binding portion 5B is in close contact with the inner surface of the annular portion 24b, and the second ferrule 23B is in close contact with the inner surface of the tubular portion 24c.
• the second binding portion 5B is passed through the second set screw 25B.
• the second binding portion 5B which is passed through the second set screw 25B, is passed through the second metal ring 24B and the second ferrule 23B.
• the second set screw 25B is screwed into the second passage 17 (e.g., the third inner wall 17d) with the second ferrule 23B and the second metal ring 24B, through which the second binding portion 5B is inserted, inserted into the second passage 17.
• the intake port 15 is an opening formed to draw air from the space 4b outside the multiple tubes 2 inside the housing 4.
• a third pipe 18d that communicates with the space 4b outside the multiple tubes 2 inside the housing 4 is joined to the intake port 15.
• a suction pump (not shown) is connected to the third pipe 18d. The suction pump draws air through the intake port 15, thereby reducing the pressure in the space 4b of the housing 4.
• the third pipe 18d is joined to the intake port 15 by, for example, welding, screwing, or fitting.
• the degassing module 1 has multiple tying straps 26.
• the multiple tubes 2 have an annular portion 2d that is annular inside the housing 4.
• the multiple tubes 2 extending from the first bundling portion 5A are bent to form an annular shape at the annular portion 2d, and then extend from the annular portion 2d to the second bundling portion 5B.
• multiple wrapper straps 26 bundle multiple tubes 2 in a lined-up state along the annular portion 2d.
• four wrapper straps 26 are lined up at equal intervals along the annular portion 2d.
• the space 4b outside the multiple tubes 2 inside the housing 4 is suctioned using a suction pump connected to the third tube 18d (suction step). Along with this suction, liquid is supplied to the first tube 18b (liquid supply step).
• liquid is supplied to the first tube 18b, the liquid is degassed, and the degassed liquid is discharged from the second tube 18c.
• liquid may also be supplied to the second tube 18c, the liquid is degassed, and the degassed liquid may be discharged from the first tube 18b.
• Figure 5 is a diagram showing an example of a cross section of the tube 2.
• any of the tube 2A shown in Figure 5(a), the tube 2B shown in Figure 5(b), and the tube 2C shown in Figure 5(c) can be used.
• non-porous layer 22 is located radially outside porous layer 21.
• Porous layer 21 functions as a support layer for tube 2A.
• Porous layer 21 is, for example, a porous membrane.
• porous layer 21 is produced by melt-extruding the material that constitutes porous layer 21 into a tubular shape.
• the thickness of porous layer 21 at protruding portion 2c of tube 2A is greater than the thickness of porous layer 21 in portions other than protruding portion 2c of tube 2A.
• the non-porous layer 22 is a thin film thinner than the porous layer 21.
• the non-porous layer 22 is formed radially outward of the porous layer 21 by a dipping method.
• the thickness of the non-porous layer 22 is, for example, 1 ⁇ m.
• the non-porous layer 22 is also called a skin layer.
• the pore diameter of the non-porous layer 22 is 1 nm or less.
• the non-porous layer 22 has high gas permeability while blocking the passage of liquid.
• the thickness of the non-porous layer 22 at the protruding portion 2c of the tube 2A is the same as the thickness of the non-porous layer 22 in the portion other than the protruding portion 2c of the tube 2A.
• non-porous layer 22 is located radially inside porous layer 21.
• non-porous layer 22 is formed radially inside porous layer 21 by a dipping method.
• porous layer 21 protrudes radially outward.
• non-porous layer 22 has a circular shape in the cross section of tube 2B.
• the non-porous layer 22 is formed on both the radially outer side of the porous layer 21 and the radially inner side of the porous layer 21.
• the non-porous layer 22 located on the radially outer side protrudes radially outward together with the porous layer 21.
• the non-porous layer 22 located on the radially inner side has a circular shape.
• each tube 2 is composed of multiple layers 20.
• the multiple layers 20 include a porous layer 21 and a non-porous layer 22 that is aligned radially with the porous layer 21 and is permeable to gas but not liquid.
• the gas permeability of the porous layer 21 can be increased.
• the non-porous layer 22 that is aligned radially with the porous layer 21 can be formed as a thin film. By forming the non-porous layer 22 as a thin film, the non-porous layer 22 is less likely to leak liquid and has increased gas permeability.
• the non-porous layer 22 may be located radially outward of the porous layer 21.
• the non-porous layer 22 is located radially outward of the porous layer 21. Therefore, particularly in an external perfusion system in which liquid flows outside the tube 2, the thin non-porous layer 22 can prevent liquid leakage and increase gas permeability.
• the non-porous layer 22 may be located radially inward of the porous layer 21.
• the non-porous layer 22 is located radially inward of the porous layer 21. Therefore, particularly in an internal perfusion system in which liquid flows inside the tube 2, the thin non-porous layer 22 can prevent liquid leakage and increase gas permeability.
• the non-porous layer 22 may be located both radially outside and radially inside the porous layer 21. In this case, the non-porous layer 22 is located both radially outside and inside the porous layer 21. Therefore, in both the external perfusion method and the internal perfusion method, liquid leakage can be prevented and gas permeability can be increased.
• the ends of the multiple tubes 2 each have a protruding portion 2c that protrudes radially outward.
• the multiple tubular portions 2b are arranged in a closely packed structure, and the ends of the multiple tubes 2 can be arranged so that the multiple protruding portions 2c are located in the gaps formed between the multiple tubular portions 2b. Therefore, the ends of the multiple tubes 2 can be arranged more closely together, thereby improving the binding strength of the multiple tubes 2.
• the degassing module 1 comprises the aforementioned tube unit 3 and a housing 4 that houses the tube unit 3.
• the housing 4 has a first opening 13 and a second opening 14 that communicate with the internal space 2a of the multiple tubes 2, and an air intake 15 that communicates with the space 4b outside the multiple tubes 2 inside the housing 4.
• the degassing module 1 has the aforementioned tube unit 3. Therefore, the degassing module 1 provides the same effects as the aforementioned tube unit 3.
• the housing 4 may be made of stainless steel. In this case, the durability of the housing 4 can be increased by making the housing 4 out of stainless steel.
• the degassing method according to this embodiment degasses the liquid that has entered the internal space 2a of the plurality of tubes 2 via the first passage 16 of the degassing module 1 described above.
• This degassing method uses the degassing module 1 described above. Therefore, this degassing method achieves the same effects as the degassing module 1 described above.
• the tube unit, degassing module, and degassing method according to the present disclosure are not limited to the contents of the above-described embodiments, and may be modified within the scope of the spirit and scope of the claims.
• the shape, size, material, number, and arrangement of each part of the tube unit and degassing module according to the present disclosure, as well as the content and order of the steps of the degassing method according to the present disclosure may be modified as appropriate within the scope of the above-described spirit and scope.
• the ferrule 43 has, for example, a cylindrical portion 43b and a tapered cylindrical portion 43c that tapers in diameter away from the cylindrical portion 43b.
• the metal ring 44 has an annular portion 44b that comes into contact with the first set screw 25A (or second set screw 25B) and an inner surface 44c that tapers so that the metal ring 44 becomes thinner away from the annular portion 44b.
• the ferrule 43 and metal ring 44 enter the first passage 16 and the second passage 17, respectively, with the inner surface 44c in contact with the tapered cylindrical portion 43c.
• the degassing module 1A which has a ferrule 43 and a metal ring 44, can achieve the same effects as the degassing module 1 described above.
• the number of tubes 2 constituting the tube unit 3 was seven.
• the number of tubes constituting the tube unit is not particularly limited, and may be, for example, several tens or several hundreds.
• the tubular portion 2b extends cylindrically along the extension direction of the tube 2.
• the tubular portion may have any shape as long as it extends cylindrically along the extension direction of the tube.
• the tubular shape of the tubular portion may be, for example, an oval, elliptical, or rectangular cylindrical shape. Even if the tubular portion is formed in this manner, if a protrusion protrudes from the tubular portion, the ends of multiple tubes can be closely spaced to improve the binding strength of the multiple tubes.
• a tube unit 3 having a sealing portion 7 was described.
• the tube unit may not have a sealing portion 7 that seals between the ends of the multiple tubes 2 and the outer tube 6.

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Citations (4)

• 2025
  • 2025-01-20 WO PCT/JP2025/001576 patent/WO2025177744A1/ja active Pending
  • 2025-01-20 JP JP2026501179A patent/JPWO2025177744A1/ja active Pending

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