JPH08108049A - Hollow fiber membrane type module - Google Patents

Abstract

PURPOSE: To prevent the packed quantity of hollow fiber membranes from being reduced while making the flow of a gas flow outside the hollow fiber membranes approach a contercurrent model by forming no opening within a specified distance from one sealing part to a partition installed in the hollow fiber membrane and making a part exceeding it have an opening. CONSTITUTION: Plural hollow fiber membranes 9 are fitted in a housing 10, and both the ends of the hollow fiber membranes 9 are sealed in a housing 10 with the inside of the membranes 9 being opened, and the housing is provided with connecting ports 13, 14 communicating with the outside of the hollow fiber membranes 9. And in the housing 10, a partition 15 of gas impermeable partition 15 is installed so that the hollow fiber membranes 9 may be divided into plural sets. The partition 15 has no opening at a position within a distance, at least 50% of the distance between one sealing part 11 (12), from the sealing part, and a part or the whole of a portion exceeding it is opened. In this way, performance approaching a countercurrent is realized, and the quantity of the hollow fiber membranes packed into the module is not reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved hollow fiber membrane type module, and in particular, the inside of the hollow fiber membrane is the primary side,
The present invention relates to a hollow fiber membrane type module used in a method in which a gas is brought into contact with the outside of a hollow fiber membrane which is a secondary side, and includes, for example, nitrogen enrichment, hydrogen separation, helium separation, carbon dioxide separation, organic matter in air. Gas separation such as solvent vapor separation (gas includes vapor here), degassing and devolatilization to remove gases such as oxygen and carbon dioxide from water, and volatile substances such as trichlorethylene, water / alcohol separation The present invention relates to a hollow fiber membrane type module having improved separation efficiency in applications such as pervaporation used for water / organic solvent separation and the like, membrane distillation and the like.

[0002]

In membrane separation, hollow fiber membranes are commonly used in the form of modules housed in a housing. Its typical structure is shown in FIG. That is, the hollow fiber membranes 1 are loaded into the housing 2 in a bundled state, a wound state, a braided state, or the like, and both ends of the hollow fiber membranes 1 are sealed with a resin or the like 3, 3 ′. The inside and the outside of the hollow fiber membrane are separated, and the inside of the hollow fiber membrane is open at the end faces 4, 4'of the sealing portion. In using the module, for example, in the case of a gas separation membrane module, a non-permeated gas introduced from the connection port 5 into the inside of the hollow fiber membrane through the mixed gas and taken out from the connection port 6 which is the opposite end inside the hollow fiber membrane. And the permeated gas that permeates the hollow fiber membrane and is taken out from the connection port 7 and / or 8. Alternatively, the connection port 7 or 8
Further, the mixed gas is introduced to the outside of the hollow fiber membrane, and is separated into a non-permeable gas flowing out from the connection port 8 or 7 and a permeated gas that is taken out from the connection port 5 and / or 6 and permeates into the hollow fiber membrane. . At this time, from a chemical engineering point of view, it is said that the mixed gas and the permeated gas are caused to flow in countercurrent (counterflow) in the highest efficiency. However, in the module having the structure of FIG. 1, for example, the mixed gas is introduced into the hollow fiber membrane from the connection port 5 and flows toward the connection port 6, while the connection port 8 is closed and the permeated gas is taken out from the connection port 7. , The concentration and yield of the separated gas is much lower than the theoretical value, and cross flow
It only showed performance close to the mold. In addition, using the module of FIG. 1, an attempt was made to introduce the mixed gas into the connection port 7 and flow the mixture gas outside the hollow fiber membrane toward the connection port 8 and close the connection port 6 to take out the permeated gas from the connection port 5. Even if I went, I got a lower result. That is, it was difficult to realize countercurrent type performance close to theory in the hollow fiber membrane type module. Further, even in degassing and devolatilizing from a liquid, or pervaporation or membrane distillation, the only difference is that the primary side is not a gas but a liquid, and the countercurrent type is the most efficient, The situation was the same for the fact that the ideal countercurrent type was not realized in the hollow fiber membrane type module.

In order to solve these problems, hollow fiber membranes divided into a plurality of groups are gas-impermeable for each group, as disclosed in Japanese Utility Model Application No. 5-51432 filed by the present inventors. A hollow fiber membrane-type module has been devised, which is loaded in a flexible cylinder, and the cylinder has a length of 50 to 99.5% in the length direction of the hollow fiber membrane. However, according to this invention, although the performance close to an ideal countercurrent is realized, the amount of hollow fiber membranes that can be packed in the module is reduced, and the processing amount per module is reduced. was there.

[0004]

DISCLOSURE OF THE INVENTION The present invention makes the gas flow outside the hollow fiber membrane close to an ideal countercurrent model,
An object of the present invention is to provide a hollow fiber membrane type module in which the amount of hollow fiber membranes that can be filled does not decrease.

[0005]

The present inventors have arrived at the present invention as a result of extensive studies on the above problems. That is, the gist of the present invention is, firstly, that a plurality of hollow fiber membranes are loaded in a housing, and both ends of the hollow fiber membranes are sealed in the housing with the inside of the membranes open, and A hollow fiber membrane type module having a connection port that communicates with the outside of the membrane, wherein a gas impermeable partition wall is provided in the housing so as to divide the hollow fiber membrane into a plurality of groups, and the partition wall seals one side. A hollow fiber membrane-type module characterized in that it does not have an opening at a position up to at least 50% of the distance between the sealing portion and the sealing portion, and that part or all of the portion beyond that is open. And secondly, a hollow fiber membrane type module in which a plurality of hollow fiber membranes are loaded in a housing, and both ends of the hollow fiber membranes are respectively sealed in the housing with the inside of the membrane open, Divide the hollow fiber membrane into multiple sets in the housing As described above, a gas impermeable partition wall is provided over the entire space between both sealing parts, and any set of hollow fiber membranes is surrounded by the partition wall and the housing, and one of the inner surfaces of the housing is sealed. 70 to 1 of the distance between the seal and the seal
The hollow fiber membrane type module is characterized in that a channel connecting each space separated by a partition wall and a connection port communicating with the outside of the hollow fiber membrane is provided within the range of 00%.

The present invention will be described in more detail with regard to its essential parts. In the first and second modules of the present invention (hereinafter collectively referred to as the module of the present invention), as shown in FIGS. At both ends, the hollow fiber membrane 9 is made of resin or the like while the inside (lumen side) of the hollow fiber membrane is open.
Since the spaces are hermetically sealed 11 and 12, the space communicating with the inside of the hollow fiber membrane and the space communicating with the outside thereof are separated. The sealing portions 11 and 12 may be airtightly adhered to the housing, or may be airtightly fixed to the housing by an O-ring or the like. The housing is provided with connection ports 13 and 14 at both ends communicating with the inside of the hollow fiber membrane 9 separately, and a connection port 17 communicating with the outside of the hollow fiber membrane. That is, it is a structure in which the fluid can be introduced from the connection port at one end of the hollow fiber membrane and discharged from the connection port at the other end. Further, it has a structure capable of taking out the gas, the volatile substance, and the like that have permeated the membrane from the connection port 17.

The feature of the module of the present invention resides in that, in addition to the above structure, the hollow fiber membranes 9 are divided into a plurality of groups and loaded by the gas impermeable partition walls 15. First, in the case of the first module, the gas-impermeable partition wall 15 is fixed in contact with one sealing portion 11 in a substantially airtight manner,
There is no opening in the range from the sealing portion 11 to the position of at least 50% of the distance between the sealing portions, and a part or all of the portion beyond the opening is opened. What is an opening?
It refers to a part where the partition walls are open so that the space surrounded by the partition walls or the space surrounded by the partition walls and the housing communicates with the connection port 17. The inter-sealing portion distance referred to here means the distance between the module inner end surfaces (not the end surface where the hollow fiber membrane is open) of the sealing portions 11 and 12. When the inner end faces are not parallel, the average distance is used. When the opening is present in a range of 50% or less of the distance between the sealed portions, the portion that acts as a countercurrent is reduced and the separation efficiency is lowered.

For example, as shown in FIG. 2, the sealing portion 11
To at least 50%, preferably at least 80%, and more preferably at least 90% of the distance between the seals, and the opening 1 of the partition wall extends beyond that.
6. The shape of this opening is arbitrary and can be provided by forming a hole in the partition wall. The number and shape of the holes are arbitrary. The holes may be, for example, circular, slit-shaped, or wedge-shaped. The holes may be present in the entire range described above, or may be present in a part thereof. It is preferable that the number of openings is large or large enough not to give a gas permeation resistance. The size of the range in which the openings 16 of the partition walls are present is preferably 0.5% or more, and more preferably 2% or more of the distance between the sealed parts, because the size does not become gas permeation resistance.

Further, as shown in FIG. 3, for example, the partition wall 15 exists in the range from the sealing portion 11 to at least 50%, preferably at least 80%, and more preferably at least 90% of the distance between the sealing portions. However, the present invention also includes a case where a part or all of the partition wall is missing in a portion beyond that. The shape of the missing portion 18 of the partition wall is arbitrary, and may be a shape obtained by cutting the partition wall at a right angle to the longitudinal direction of the housing, an obliquely cut shape, or another complicated shape. If the cut surface of the partition is not perpendicular to the lengthwise direction of the housing, the length of the partition shall have an average value. The length of the defective portion 18 of the partition wall is preferably 0.5% or more of the distance between the sealing portions, because the length does not become a gas permeation resistance.
It is more preferably at least 2%.

The connection port 17 through which gas is taken out is the opening 1
6 or a position near the defect portion 18 is preferable. That is, the position of the connection port 17 is at least 50% of the distance between the sealing portions 11 and the sealing portion, preferably at least 70%.
%, And more preferably at least 90% beyond the position, and the sealing portion 12 on the side of the opening 16 or the defective portion 18
It is preferable that the position is close to. As will be described later, the position of the connection port 17 is arbitrary when all the sets of hollow fiber membranes are surrounded by partition walls.

Next, in the case of the second module, as shown in FIG. 5, for example, the hollow fiber membranes 9 are loaded into the module divided into a plurality of groups by gas impermeable partition walls 15. The partition wall 15 is provided between the sealing portions, that is, between the sealing portions 11 and 12, and has no opening. The shape of the partition wall 15 in the section A of FIG. 5 is such that there is no set of hollow fiber membranes that are substantially airtightly surrounded only by the partition wall.
As seen in (a), the hollow fiber membrane outer space is in contact with the housing for all the sets of hollow fiber membranes.

On the inner surface of the housing, there is provided a channel 19 connecting the spaces separated by the partition wall, which is connected to the connection port 17. The channel 19 guides the gas flowing in the space separated from the connection port 17 by the partition wall 15 to the connection port 17. Therefore, the channel 19 does not need to be provided all around the inside of the housing 10, and it is sufficient if the space separated from the connection port 17 by the partition wall is provided so as to communicate with the connection port 17. The channel may be, for example, a groove cut inside the housing, or may be formed by connecting the housing with another housing member having a larger inner diameter as shown in FIG. It may be molded to have a large inner diameter. That is, the gas or the like that has permeated the hollow fiber membrane 9 flows toward the channel 19 in the space divided by the partition wall 15 without substantially permeating the partition wall 15 and passes through the channel 19 to the outside of the module from the connection port 17. Taken out.

The position of the channel 19 is determined by the one sealing portion 1
1 to 70 to 100% of the distance between the sealed portions, preferably 80
To 100%, and more preferably 90 to 100%. The width and height of the channel can be designed so that the pressure loss does not increase, and may be appropriately determined depending on the gas permeation rate of the membrane and the size of the module. There may be multiple channels. A mesh or a plate or sheet with holes may be provided at the boundary between the channel 19 and the hollow fiber membrane 9.

Partition wall 15 used in the module of the present invention
Is substantially gas impermeable, and the gas or the like that has permeated the hollow fiber membrane 9 flows toward the opening 16, the defective portion 18 or the channel 19 in the space divided by the partition wall 15, and the opening 16, the defective portion It comes out of the portion 18 or the channel 19, and is taken out of the module through the connection port 17. Substantially gas impermeable means that the amount of gas that permeates through the partition wall 15 is negligible as compared with the amount of gas that passes through the opening 16, defect 18 or channel 19 of the partition wall.

In the present invention, the partition wall 15 is provided on one side of the sealing portion 1.
Any method may be used for the method of substantially contacting with 1 to fix it in a hermetic manner, for example, a method of sealing the partition wall with the hollow fiber membrane, a method of adhering to the sealing section 11, a method of substantially hermetically sealing to the sealing section 11. A method of fixing to the housing 10 in the contact state can be adopted. The term “substantially airtight” means that the amount of gas flowing through the gap between the sealing portion 11 and the partition wall 15 is the opening 16 of the partition wall or the defective portion 18.
Alternatively, it means that the amount is negligible compared to the amount flowing through the channel 19.

In the case of the first module, the partition may have any shape for dividing the hollow fiber membrane into a plurality of groups. For example, FIGS.
As shown in FIG. 4 (A) showing the cross section of the portion A, all the sets of hollow fiber membranes may be surrounded by the partition wall and the housing, and the outer space of the hollow fiber membranes may be in contact with the housing. However, as shown in FIG. 4 (b), all the sets of hollow fiber membranes may be surrounded by only partition walls, or both may be mixed as shown in FIG. 4 (c). It may have a shape. In the case of the second module, as described above, all the sets of hollow fiber membranes are surrounded by the partition wall and the housing.

In the present invention, the cross-sectional shape of the partition wall in the module or the space surrounded by the partition wall and the housing may be any shape, or may be different for each space. The cross-sectional area of each space is also arbitrary and may be different for each space. However, the value obtained by dividing the average diameter of the partition walls or the space surrounded by the partition wall and the housing by the distance between the sealing portions (hereinafter, this value is referred to as “average diameter / distance between sealing portions”) is 0.01. It is preferable that it is 0.1. If it is less than this value, the manufacturing cost increases and the effect of the present invention decreases. The average diameter of a space is the diameter of a circle equal to the cross-sectional area of the space. The cross-section of the space here means the cross-sectional area of the space in the transverse direction of the module, that is, in the direction perpendicular to the hollow fiber membrane.

The material and thickness of the partition wall may be any as long as they are substantially gas impermeable, and may be, for example, a polymer plate, sheet or film, and a general-purpose resin such as vinyl chloride or polyester that is easy to mold. Is preferred. The t partition may be a combination of a plurality of partitions. In either case, the partition walls 15 and / or the partition wall 15 and the housing 10 may or may not be adhered, but they need to be substantially airtight. Also in this case, substantially airtight means that the amount of gas flowing through these gaps is negligible compared to the amount of gas flowing through the opening 16 or the defective portion 18 of the partition wall. When the filling rates of the hollow fiber membranes in the spaces formed by the partition walls and between the partition walls and the housing are almost the same and the uniformity of the filling is also almost the same, the amount of gas passing through the gaps is Opening 16
Alternatively, since the amount of gas passing through the defective portion 18 can be ignored, even if there is some gap, it becomes substantially airtight. However, when the filling rate of the hollow fiber membranes in each space formed between the partition walls or between the partition wall and the housing is different or the uniformity of the filling is different, it is necessary to reduce the gap. Further, as shown in FIG. 4 (b), when all the hollow fiber membrane sets are those surrounded by only partition walls, the space between the partition walls 15 and the housing 10 need not be airtight. None, and in such a case, the position of the connection port 17 is arbitrary.

In the present invention, the loading form of the pair of hollow fiber membranes loaded in the space between the partition walls or the space surrounded by the partition wall and the housing is arbitrary. For example, it may be a substantially parallel hollow fiber membrane bundle, or may be a braid or woven fabric composed of hollow fiber membranes or hollow fiber membranes and other yarns. The set of hollow fiber membranes may be filled in parallel with each other or in the space surrounded by the partition and the housing, or may be filled obliquely or spirally. However, the module of the present invention is most effective in improving the performance when a bundle of hollow fiber membranes that are substantially parallel to each other is filled in the space substantially parallel to each other. It is preferably a bundle of thread films.

A set of hollow fiber membranes includes hollow fiber membranes 100 to 10
It is preferably composed of 000 pieces. The set of hollow fiber membranes is a bundle that is substantially parallel, and the outer diameter of the hollow fiber membranes is 150.
In the case of ˜350 μm, it is preferable that the number is 1000 to 10000, and similarly, the outer diameter of the hollow fiber membrane is 350 to 80.
In the case of 0 μm, the number is preferably 100 to 3000. If the number of hollow fiber membranes in one set is too large, the performance improving effect is reduced, and if it is too small, the manufacturing cost becomes high.

The filling factor of the hollow fiber membrane in the partition wall is 25 to 85.
%, Preferably 45 to 85%, and more preferably 60 to 80% when the hollow fiber membranes to be filled are substantially parallel bundles. The filling rate here means the ratio of the cross-sectional area of the hollow fiber membranes filled in the spaces to the cross-sectional area of each space surrounded by the partition walls or each space surrounded by the partition walls and the housing. The filling rate can be calculated by the following formula.

[0022]

[Equation 1] However, r ₀ : hollow fiber membrane outer diameter / 2 n: number of hollow fiber membranes R _i : housing inner diameter / 2 T: partition wall thickness unit (cm) The filling rate in the case of the closest packing is about 91%. The higher the filling rate is, the more the effect of the present invention is exhibited. However, if the filling rate is too high, the sealing tends to be incomplete and the manufacturing yield is lowered. On the other hand, if the filling rate is too low, the performance improving effect decreases. The hollow fiber membrane filling ratios of the partition walls or the spaces surrounded by the partition walls and the housing do not necessarily have to be equal, but it is preferable that they are as equal and high as possible.

The module of the present invention may not be effective when the hollow fiber membrane is flexible, but is particularly effective when it is rigid. Although the reason is unknown, it is considered that when the hollow fiber membrane is rigid, the hollow fiber membrane is likely to be uniformly filled to the corners of the space divided by the partition wall. Therefore, the hollow fiber membrane used in the present invention is preferably made of a rigid polymer having a high glass transition temperature such as polyimide or polysulfone, and is preferably relatively thick. The outer diameter of the hollow fiber membrane is preferably 200 to 700 μm, more preferably 300 to 500 μm, considering the surface area of the membrane filled in the module.

The shape of the housing is arbitrary. The cross-sectional shape of the housing is preferably a circle from the viewpoint of easy availability of the material, and is also preferably a quadrangle in the sense of reducing the occupied volume when a plurality of modules are used. Regarding the vertical cross-sectional shape, the first module may also have channels at the same time as the second module, and the cross-sectional area of the sealing portion of the housing may be larger than that of the hollow fiber membrane filling portion. It is also preferable to have a structure in which the filling rate in the hollow fiber membrane filling section is kept high and the filling rate in the sealing section is lowered by increasing the size. The shape is not limited to the straight tube, but may be, for example, a U shape. However, in any case, it is preferable that the filling rates of the hollow fiber membranes are almost equal in most of the range where the partition walls exist. It is also possible that a plurality of modules share a housing, for example, a plurality of sets of parts excluding the housing from the module of FIG. 2 are loaded in one housing. In addition, the module of other structure
It is also possible to share the housing with the housing.

Each of the modules of the present invention relates to a hollow fiber membrane type module used in a method in which the inside of the hollow fiber membrane is the primary side and the gas is in contact with the outside of the hollow fiber membrane which is the secondary side. Yes, as a gas separation module that introduces fluid such as liquid or mixed gas containing gas or volatile substance into the hollow fiber membrane, and permeates gas or volatile substance or separated gas from the outside of the hollow fiber membrane Particularly suitable, 1
By introducing the fluid to be introduced to the next side from the opening 16 or the defective portion 18 of the partition wall 15 or the connection port 13 on the side close to the channel 19, the fluid acts as a countercurrent type module,
The performance is demonstrated.

[0026]

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

Example 1 As shown in FIGS. 3 and 4A, a partition wall made of hard vinyl chloride having a thickness of 1 mm divided into four parts, a length of 60 cm and an inner diameter of 100.
mm cylindrical vinyl housing of 4 mm each with 2000 spaces, outer diameter 450 μm, inner diameter 24
0 μm, oxygen transmission rate 2.2 × 10 ⁻⁵ (cm ³ (ST
P) / cm ² , sec, cmHg) and a polysulfone hollow fiber membrane having an oxygen / nitrogen separation coefficient of 6.1 are packed substantially in parallel,
Both ends were centrifugally sealed with a two-pack type epoxy resin, and the rear ends were cut to give an average thickness of 5 cm for the sealed portions and an average distance of 5 between the sealed portions.
A 0 cm module was made. At this time, one end of the partition wall 15 loaded with the hollow fiber membrane 9 is embedded and sealed in the sealing portion 11, and the length from the inner surface of the sealing portion 11 to the other end of the partition wall 15 is 45 cm. The missing portion of the partition 15 is 5c
It was set to be m. The partition walls are adhered to each other, but the partition wall and the housing are only in contact with each other and are not adhered. The housing is provided with a connection port 17 at a position in contact with the sealing part 12 on the side closer to the opening 16 of the partition wall, and is also provided with connection ports 13 and 14 communicating with the inside of the hollow fiber membrane. The filling factor of the hollow fiber membrane is 6 when calculated by the formula shown in Equation 1 with the circular constant of 3.14.
Calculated as 6.5%. Average diameter / distance between sealed parts =
4.93 / 50 = 0.099.

In this module, 0.7 MPaG is placed inside the hollow fiber membrane from the connection port 13 on the side closer to the defective portion 18 of the partition wall.
(G indicates a gauge pressure, that is, a pressurization pressure based on the atmospheric pressure) was introduced, a flow rate control valve was connected to the connection port 14, and a non-permeable gas was taken out. Meanwhile connection port 17
Was released to the atmosphere and the gas that permeated the hollow fiber membrane was discharged.
The nitrogen concentration of the gas taken out from the connection port 14 is 99.0.
The flow rate control valve connected to the connection port 14 was adjusted so that the flow rate of the nitrogen-enriched air taken out from the connection port 14 was 0.245 Nm ³ / hour (N is normal, that is, 0 ° C., 1 ° C.). It means that it is the atmospheric pressure conversion value). The yield (ratio of the amount of nitrogen-enriched air taken out with respect to the amount of air introduced into the connection port 13) was 32.5%.

[Embodiment 2] As shown in FIG. 2, a partition wall 15 having a total length of 60 cm and a large number of holes with a diameter of 1 cm is formed only in the range of 5 to 10 cm from the end, and the partition wall has an opening 16. The same module as in Example 1 was prepared, except that 5 cm of both ends of the partition wall were embedded in the sealing parts 11 and 12, and the connection port 17 was provided at a position near the opening part 18 of the partition wall 15. Partition wall 15 of this module
The same experiment as in Example 1 was conducted by introducing air into the hollow fiber membrane from the connection port 13 on the side closer to the opening 16. The results were exactly the same as in Example 1.

[Embodiment 3] As shown in FIGS. 5 and 4A, a partition wall having a total length of 60 cm was used, and 5 cm at both ends of this partition wall were embedded in the sealing portions 11 and 12, respectively. Partitioning the entire range between them with a partition wall, bonding a housing member having an inner diameter of 12 cm at a portion 50 cm from the end of the housing, and providing a channel 19 having a width of 5 cm and a height of 1 cm and extending all around the pipe, and A module similar to that in Example 1 was prepared except that the connection port 17 was provided in the channel 19 part. The same experiment as in Example 1 was conducted by introducing air into the hollow fiber membrane from the connection port 13 on the side close to the channel 19 of this module. The results were exactly the same as in Example 1.

[Embodiment 4] An embodiment except that the partition wall 15 has the seven-division shape shown in FIG. 4C and that the total number of hollow fiber membranes is 7850 in order to make the filling rate the same. A module similar to 1 was created. The average diameter / distance between sealed parts of this module was 0.062 in the central part and 0.076 in the peripheral part. When the same experiment as in Example 1 was conducted using this module, the nitrogen concentration was 99.0.
The flow rate as% was 0.25 m ³ / hour, and the yield was 33.0%.

[Comparative Example 1] A module having the same dimensions was manufactured in the same manner as in Example 1 except that 8210 hollow fiber membranes were housed in a housing as a substantially parallel bundle without using the partition wall 15. did. The filling rate of the hollow fiber membrane is 66.5%, which is the same as in Example 1. When the same experiment as in Example 1 was conducted using this module, the flow rate at which the nitrogen concentration was 99.0% was 0.22 Nm ³ / hour, and the yield was 30.0%.

[Comparative Example 2] Without using the partition wall 15, hollow fiber membranes were instead loaded into seven rigid vinyl chloride cylinders each having an inner diameter of 3 cm, an outer diameter of 3.2 cm, and a length of 50 cm, and the inner diameter was 10 cm. By incorporating in a housing with a length of 60 cm and embedding 5 cm on one end in resin for sealing, the 5 cm range of the hollow fiber membrane is not covered at one end between the sealing parts. A module having the structure disclosed in 5-51432 was manufactured. At this time, if the hollow fiber membrane filling rate of each cylinder was 66.5%, which was the same as in Example 1, the number of hollow fibers was 5166, and only 64.6% of Example 1 could be filled. When an experiment similar to that of Example 1 was conducted using this module, the nitrogen concentration was 99.0%.
Was 0.16 Nm ³ / hour, and the yield was 33.0%.

[0034]

EFFECTS OF THE INVENTION By using the module of the present invention, performance close to countercurrent is realized and the amount of hollow fiber membranes that can be packed in the module does not decrease. Therefore, in gas separation, the concentration of concentrated gas is increased. , Increase yield, and reduce operating energy cost. Further, in degassing or devolatilizing a liquid, it is possible to reduce the concentration of residual gas and the concentration of residual volatile substances, increase the amount of treatment, and reduce the operating energy cost. Further, in pervaporation and membrane distillation, the concentration of concentrated liquid can be increased, the yield can be increased, and the operating energy cost can be reduced. Further, in any of the usages, the module can be made compact and the manufacturing is easy, so that the installation space can be saved and the module manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional front view of a conventional module.

FIG. 2 is a vertical sectional front view of a module used in an embodiment of the present invention.

FIG. 3 is a vertical sectional front view of a module used in an embodiment of the present invention.

FIG. 4 is a lateral cross-sectional side view of a portion A in FIGS. 2 and 3.

FIG. 5 is a front view in vertical section of a module used in an embodiment of the present invention.

[Explanation of symbols]

 1 Hollow Fiber Membrane 2 Housing 3, 3'Sealing Part 4, 4'Sealing Part End Face 5, 6, 7, 8 Connection Port 9 Hollow Fiber Membrane 10 Housing 11, 12 Sealing Part 13, 14 Connection Port 15 Partition Wall 16 Partition opening 17 Connection port 18 Partition missing part 19 Channel 20 Distance between sealing parts

Claims (10)

[Claims] 1. A connection in which a plurality of hollow fiber membranes are loaded in a housing, and both ends of the hollow fiber membranes are sealed in the housing with the inside of the membrane open, and the hollow fiber membranes are connected to the outside. A hollow fiber membrane type module having a mouth, wherein a gas impermeable partition wall is provided in a housing so as to divide the hollow fiber membrane into a plurality of sets, and the partition wall is provided between one sealing portion and a sealing portion. A hollow fiber membrane type module, characterized in that it has no opening at a position of at least 50% of the distance, and a part or all of the portion beyond that is open. 2. The partition wall has no opening at a position from one sealing portion to at least 80% of the distance between the sealing portions, and has an opening at a portion beyond that. Hollow fiber membrane type module. 3. The hollow fiber membrane mold according to claim 1, wherein partition walls are present at a position up to at least 80% of the distance between the sealing parts and at least 80% of the distance between the sealing parts, and there is no partition wall in the portion beyond that. module. 4. The hollow fiber membrane type module according to any one of claims 1 to 3, wherein a connection port communicating with the outside of the hollow fiber membrane is provided at a position close to a position where the diaphragm is opened. 5. A hollow fiber membrane type module in which a plurality of hollow fiber membranes are loaded in a housing, and both ends of the hollow fiber membranes are respectively sealed in the housing with the inside of the membrane being open. A gas impermeable partition wall is provided over the entire space between both sealing parts so that the hollow fiber membrane is divided into a plurality of groups, and any pair of hollow fiber membranes is surrounded by the partition wall and the housing. And within the range of 70 to 100% of the distance between the sealed parts from one of the sealed parts on the inner surface of the housing,
A hollow fiber membrane type module, characterized in that a channel connecting each space separated by a partition wall and a connection port communicating with the outside of the hollow fiber membrane is provided. 6. A value obtained by dividing the diameter of a circle equal to the cross-sectional area of the space surrounded by the partition wall or the space surrounded by the partition wall and the housing by the distance between the sealing parts is 0.01 to 0.1. 1
The hollow fiber membrane type module according to any one of items 1 to 5. 7. The hollow fiber membrane type module according to claim 1, wherein the set of hollow fiber membranes is a bundle of parallel hollow fiber membranes. 8. The filling factor of the hollow fiber membrane in each space surrounded by the partition wall or each space surrounded by the partition wall and the housing is 4.
It is 5 to 80%, The hollow fiber membrane type module as described in any one of Claims 1-7. 9. A set of hollow fiber membranes divided by partition walls, each consisting of 100 to 10,000 hollow fiber membranes.
8. The hollow fiber membrane type module according to any one of 8. 10. The hollow fiber membrane type module according to claim 1, wherein the module is for gas separation.