JP2018149471A - Separation membrane module and membrane separation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a separation membrane module in which a tubular separation membrane unit having a plurality of integrated tubular separation membranes can be easily taken in and out from a housing, and provide a membrane separation system provided with the separation membrane module.SOLUTION: A separation membrane module 1 includes a cylindrical housing 2, a plurality of tubular separation membranes 3 arranged in a longitudinal direction of the housing 2, end tubes 4 connected to one ends of the tubular separation membranes 3, a support plate 5 for supporting the end tubes 4, and a baffle 8 at upper end sides of the tubular separation membranes 3. The tubular separation membranes 3, the support plate 5, and the baffle 8 are connected and are integrated by a tie rod 14 to constitute a separation membrane unit 30. The separation membrane unit 30 is supported by a support seat 2t. An O-ring 5r is held by a dovetail groove 5h arranged on a lower surface of the support plate 5.SELECTED DRAWING: Figure 9

Description

The present invention relates to a separation membrane module used for separating some components from a fluid such as a solution or a mixed gas, and more particularly to a separation membrane module in which a plurality of tubular separation membranes are installed in a housing. The present invention also relates to a membrane separation system provided with this separation membrane module.

  A separation membrane module is known as an apparatus for separating components in a solution or mixed gas. The tubular separation membrane used in this separation membrane module has a tubular porous ceramic support and a porous separation membrane made of zeolite or the like provided on the outer peripheral surface of the support. In order to separate a specific component from a fluid such as a solution or a mixed gas, the fluid of the solution is brought into contact with one (outer surface) of the separation membrane element, and the other (inner surface) is depressurized to thereby remove the specific component. A method of vaporizing and separating, a method of vaporizing a solution and bringing it into contact with a separation membrane in a gaseous state, and depressurizing a non-contact surface side to separate a specific component, and bringing a pressurized mixed gas into contact with the separation membrane Methods for separating specific components are known (Patent Documents 1 and 2).

  In Patent Document 3, as a separation membrane module that can easily put in and out a tubular separation membrane unit in which a plurality of tubular separation membranes are integrated, a cylindrical housing and a plurality of the membranes arranged in the housing are disclosed. In a separation membrane module in which a fluid to be treated is supplied into the housing and fluid that has permeated through the tubular separation membrane is taken out, a plurality of tubular separation membranes are integrated into a separation membrane unit. The housing is provided with an openable / closable opening / closing portion through which the separation membrane unit can be taken in and out.

JP 2013-39546 A JP 2011-152507 A Japanese Patent Laid-Open No. 2006-155097

  The present invention provides a separation membrane module in which a tubular separation membrane unit in which a plurality of tubular separation membranes are integrated can be taken in and out of a housing, and a membrane separation system including the separation membrane module. Objective.

The gist of the present invention is as follows.
[1] A cylindrical housing whose vertical direction is the cylindrical axis direction;
A plurality of tubular separation membranes arranged vertically in the housing;
In the separation membrane module in which the fluid to be treated is supplied into the housing and the fluid that has permeated the tubular separation membrane is taken out.
A plurality of tubular separation membranes are integrated into a separation membrane unit,
An openable / closable portion is provided at the top of the housing,
The separation membrane unit can be taken in and out through the opening / closing part,
A support seat is provided on the lower inner peripheral surface of the housing, and the separation membrane unit is in contact with the support seat from above,
A separation membrane module, characterized in that dovetail grooves are provided around the bottom surface of the separation membrane unit, and a seal ring held in the dovetail groove is in close contact with the top surface of the support seat.
[2] In [1], an end tube is connected to one end of the tubular separation membrane,
The end pipe is supported by a support plate installed so as to cross the housing,
A baffle connected to the support plate via a rod-shaped connecting member is disposed on the other end side of the tubular separation membrane,
A separation membrane module, wherein a suspension member is provided on the baffle or the support plate.
[3] The separation membrane module according to [2], wherein the opening / closing portion is a top cover provided on an upper portion of the housing.
[4] The separation membrane module according to any one of [1] to [3], wherein pressing means for pressing the separation membrane unit downward is provided.
[5] In [4], the pressing means includes a bracket that is detachably attached to the inner peripheral surface of the upper surface of the housing, and a bolt that is provided on the bracket so as to be capable of screwing up and down. A separation membrane module, wherein a lower end of the bolt is pressed against an upper surface of the separation membrane unit.
[6] In the separation membrane module according to [5], the pressing means is a spring interposed in an accumulated state between the opening / closing portion and the upper surface of the separation membrane unit.
[7] A membrane separation system in which a plurality of separation membrane modules according to any one of [1] to [6] are installed, and a crane facility capable of lifting and hanging the separation membrane units of each separation membrane module. Membrane separation system provided.

  In the separation membrane module and the membrane separation system of the present invention, a plurality of tubular separation membranes are integrated to form a separation membrane unit. The separation membrane module can be configured by suspending and inserting it into the housing. According to the present invention, even when the number of tubular separation membranes is large, the separation membrane module can be assembled easily and quickly. Moreover, since the separation membrane unit can be lifted from the housing and taken out, the separation membrane module can be repaired easily.

It is sectional drawing which follows the housing axial center line direction of the separation membrane module which concerns on embodiment. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is an expanded sectional view of an end pipe and a support plate. It is a perspective view of the 2nd baffle. It is a perspective view of a housing upper part. It is an expanded sectional view of a part of a housing. It is sectional drawing which shows the assembly method of a separation membrane module. It is an expanded sectional view of the upper part of a separation membrane module. It is an expanded sectional view of the upper part of the separation membrane module which concerns on another embodiment. It is a flowchart of a membrane separation system. It is a top view of a membrane separation system.

  With reference to FIGS. 1-8, the separation membrane module which concerns on one embodiment of this invention is demonstrated.

  This separation membrane module 1 is provided in a cylindrical housing 2 with the cylindrical axis direction as the vertical direction, a plurality of tubular separation membranes 3 arranged in parallel to the axial line of the housing 2, and a lower part in the housing 2. The support plate 5, the bottom cover 6 A attached to the lower end of the housing 2, the top cover 6 B attached to the upper end, and the first and the second arranged in the lower and upper portions of the housing 2 in parallel with the support plate 5. A baffle (rectifier plate) 7 and a second baffle (rectifier plate) 8 are included. The first baffle 7 is disposed on the upper side of the support plate 5. Although not shown in the figure, a mechanism for preventing vibration of the tubular separation membrane 3 may be provided on the upper part of the baffle 8 as described in JP-A-2006-155095.

  In this embodiment, outward flanges 2a, 2b, 6b, 6c are provided on the lower and upper ends of the housing 2 and the outer peripheral edges of the bottom cover 6A and the top cover 6B, respectively, and these are fixed by bolts (not shown). Has been. In this embodiment, the top cover 6B constitutes an opening / closing part.

  The peripheral edge of the support plate 5 is supported by a support seat 2 t that is provided around the inner peripheral surface of the housing 2. As shown in FIG. 7, dovetail grooves (grooves whose entrance side width is smaller than the back side) 5 h are provided on the lower surface of the peripheral edge portion of the support plate 5 so as to circulate along the outer peripheral edge of the support plate 5. A ring 5r is accommodated. Sealing is performed when the lower end portion of the O-ring 5r is looked out from the inlet of the dovetail groove 5h and brought into close contact with the upper surface of the support seat 2t.

  In this embodiment, as shown in FIG. 6, the guide ridge 2c is provided so as to extend from the upper end of the inner peripheral surface of the housing 2 to the vicinity of the support plate 2t. The ridge 2 c extends in a direction parallel to the axis of the housing 2. The protrusions 2c are provided in a total of two strips at opposite positions across the axis of the housing 2. However, even if only one strip is provided, there are a total of three at each of the three equal or four equal positions in the circumferential direction of the housing 2. Articles or four articles may be provided. Further, instead of the ridges 2c, notched recesses (guide ridges) are extended on the inner peripheral surface of the housing 2 in a direction parallel to the axial center, and the peripheral edges of the support plate 5 and the baffles 7, 8 are You may provide the convex part engaged with a concave strip.

  At the peripheral edge portions of the support plate 5 and the baffles 7, 8, a notch-like recess is provided that engages with the protrusion 2 c. 5 and 7 show the baffle 8 and the notched recesses 8c and 5f of the support plate 5. Although not shown, the notch-shaped recess of the baffle 7 has the same shape.

  In this embodiment, the end tube 4 is connected to the lower end of the tubular separation membrane 3, and the end plug 20 is connected to the upper end of the tubular separation membrane 3. Although only seven tubular separation membranes are shown in FIGS. 1 to 3, a large number are actually provided as shown in FIG. Moreover, you may be set as the tubular separation membrane coupling body by which the 2 or more tubular separation membrane 3 was connected by the joint pipe (not shown).

  An inlet 9 for the fluid to be processed is provided on the outer peripheral surface of the lower portion of the housing 2, and an outlet 10 for the non-permeating fluid is provided on the outer peripheral surface of the upper portion. The inflow port 9 is provided so as to face the chamber 11 between the support plate 5 and the first baffle 7. The outlet 10 is provided so as to face the upper chamber 12 of the second baffle 8. Between the baffles 7 and 8 is a main chamber 13 for performing membrane separation. In the figure, the inflow port 10 is arranged at the upper part and the outflow port 9 is arranged at the lower part, but it is not particularly limited. Further, the positions of the inlet 10 and the outlet 9 may be interchanged.

A plurality of tie rods 14 are erected from the bottom support plate 5 as rod-like connecting members, and the baffles 7 and 8 are supported by the tie rods 14. A male screw is engraved at the lower end of the tie rod 14 and is screwed into a female screw hole provided on the upper surface of the support plate 5. The baffles 7 and 8 are supported at a predetermined height by sheath tubes 14A and 14B (FIG. 4) fitted on the tie rod 14. The sheath tube 14 </ b> A is disposed between the support plate 5 and the baffle 7. The sheath tube 14 </ b> B is disposed between the baffles 7 and 8. The baffle 8 is mounted on the upper end surface of the sheath tube 14B, and is fixed by a nut 14n screwed to the upper end of the tie rod 14. The number of baffles is not limited to this embodiment, and three or more baffles may be used.
Alternatively, a baffle 7 may be disposed on the stepped surface of the other end of the round bar after a round bar provided with male threads at both ends is screwed into the female screw hole of the support plate 5 without using a sheath tube. The length of the male screw disposed on the baffle 7 side is longer than the thickness of the baffle 7, and after the baffle 7 is disposed, the end of the screw portion protrudes from the top of the baffle 7. Another round bar having a female screw / a male screw at the end can be screwed into the male screw portion protruding from the upper portion, and used as an alternative to the sheath tube 14B. A round bar is strong and can assemble a separation membrane unit more firmly than a sheath tube. A part of the round bar may be shaved parallel to the axial direction in order to facilitate screwing and a spanner or the like. When fixing a baffle, you may arrange | position the round bar which fixes with a net | network etc. and also has a thread part.

  Each baffle 7, 8 is provided with circular insertion holes 7 a, 8 a for inserting the tubular separation membrane 3, and a connection body of the tubular separation membrane 3, the end tube 4 and the end plug 20 is provided in each insertion hole 7 a. , 8a. The diameters of the insertion holes 7a and 8a are larger than the diameters (outer diameters) of the tubular separation membrane 3, the end tube 4 and the end plug 20, and the inner peripheral surfaces of the insertion holes 7a and 8a, and the end tube 4 and the end plug 20 There is a gap between the outer peripheral surface and the entire circumference.

  As shown in FIG. 5, a single or a plurality (two in this embodiment) of eyebolts 8 d are provided on the upper surface of the baffle 8. The eyebolt may be connected to the upper part of the tie rod 14.

  As shown in FIG. 9, a bracket 41 is detachably attached to the upper inner peripheral surface of the housing 2 by bolts 42 in order to hold down the baffle 8 from above. The bracket 41 has an upright wall portion 41 a along the inner peripheral surface of the housing 2 and an overhanging portion 41 b that projects horizontally from the upright wall portion 41 a toward the center of the housing 2. The bolt 42 is inserted into a bolt insertion hole (not shown) provided in the standing wall 41 a and is screwed into a female screw hole on the inner peripheral surface of the housing 2.

  The overhanging portion 41b is provided with a female screw hole (not shown) in the vertical direction, and a bolt 43 is screwed into the female screw hole. The lower end of the bolt 43 abuts against the upper surface of the baffle 8, and further forwardly rotates until the O-ring 5r is strongly pressed against the upper surface of the support seat 2t. Thereby, the space between the upper surface of the support seat 2t and the lower surface of the outer peripheral portion of the support plate 5 is tightly sealed. An elastic body such as rubber may be interposed between the lower end of the bolt 43 and the upper surface of the baffle 8.

  The bracket 41 is preferably an annular body that goes around the inner circumference of the housing 2, but a plurality of brackets 41 may be arranged in the circumferential direction on the inner circumference of the housing 2.

  An insertion hole 5 a into which the lower end of the end tube 4 connected to the tubular separation membrane 3 is inserted is provided on the upper surface side of the support plate 5. The insertion hole 5a has a cylindrical shape and extends from the upper surface of the support plate 5 to the middle in the thickness direction. The bottom of the insertion hole 5a faces the outflow chamber 16 below the support plate 5 through the small hole 5b and the large hole 5c.

  The tube hole 4a of each end tube 4 communicates with the outflow chamber 16 between the bottom cover 6A and the support plate 5 via the small hole 5b and the large hole 5c. The bottom cover 6A is provided with an outlet 6a for the separated permeated fluid.

  Although illustration is omitted, a groove is provided on the outer peripheral surface in the vicinity of the lower end of the end pipe 4, and an O-ring made of fluororubber, fluororesin, or the like is attached. Further, a groove concentric with the tube hole 4a of the end tube 4 is provided around the lower end surface of the end tube 4 and an O-ring is mounted. These O-rings are brought into close contact with the inner peripheral surface of the insertion hole and the bottom surface of the insertion hole 5a, whereby the outer surface of the end tube 4 and the insertion hole 5a are sealed. Note that only one of the O-ring on the outer peripheral surface of the end tube 4 and the O-ring on the lower end surface may be provided.

  As shown in FIG. 4, the upper end portion of the end tube 4 has a small diameter portion 4 g and is inserted into the lower portion of the tubular separation membrane 3. An O-ring is mounted in a groove provided around the outer peripheral surface of the small diameter portion 4g. An O-ring and a gasket are also interposed between the lower end surface of the tubular separation membrane 3 and the step surface of the end tube 4. The connecting portion between the end tube 4 and the tubular separation membrane 3 may be sealed by using a heat-shrinkable tube without using an O-ring or the like as described above. A tube may be used.

  An end plug 20 is connected to the upper end of the tubular separation membrane 3. The end plug 20 has a cylindrical shape or a shape obtained by cutting a part thereof, and seals the upper end of the tubular separation membrane 3. A small diameter portion inserted into the tubular separation membrane 3 is provided at the lower end of the end plug 20. The end plug 20 and the tubular separation membrane 3 are sealed with an O-ring or a gasket. Further, the end plug 20 and the tubular separation membrane 3 may be sealed by using a heat shrinkable tube without using an O-ring, or a heat shrinkable tube may be further used after using an O-ring or the like. .

  In order to reduce the weight of the end plug 20, a recess 20 v is formed from the upper end surface of the end plug 20. You may provide the drain hole which connects the bottom part of the recess 20v, and the side peripheral surface of the end plug 20. As shown in FIG.

  In this embodiment, since the end plug 20 is disposed on the upper end side of the tubular separation membrane 3, a load is applied to the tubular separation membrane 3, the end plug 20, and the end tube 4 in a direction in which their end faces are pressed against each other. Is on.

  However, in the present invention, the end tube 4 and the support plate 5 may be disposed on the upper end side of the tubular separation membrane 3, and the end plug 20 may be disposed on the lower end side of the tubular separation membrane 3. In this case, by providing a biasing member such as a spring for biasing the end plug 20 upward, the end surfaces of the tubular separation membrane 3, the end plug 20, and the end tube 4 are pressed against each other. It is preferable to apply a load. In this case, the eyebolt 8 d is provided on the surface of the support plate 5 opposite to the tubular separation membrane 3.

  In this embodiment, the lower end portion of the end tube 4 of the connection body of the tubular separation membrane 3, the end tube 4 and the end plug 20 is inserted into the insertion hole 5 a provided in the support plate 5, and the tubular separation membrane 3 and the end A connecting body of the tube 4 and the end plug 20 is erected on the support plate 5. The end tube 4 and the support plate 5 can be easily connected in an airtight or liquid-tight manner simply by inserting the lower end portion of the end tube 4 into the insertion hole 5a. Moreover, since the insertion hole 5a is cylindrical, the operation | work which drills the insertion hole 5a in the support plate 5 is easy, and manufacture of the support plate 5 is also easy. Therefore, it is possible to shorten the manufacturing period of the separation membrane module and reduce the manufacturing cost.

  In this embodiment, there is a separation membrane unit 30 (FIG. 8) in which a coupling body of a tubular separation membrane 3, an end plug 20 and an end tube 4, a support plate 5, and baffles 7 and 8 are integrated by a tie rod 14. It can be taken in and out of the housing 2 by being suspended by a wire rope 32.

  When assembling the separation membrane unit 30, the tie rod 14 is erected on the support plate 5. Further, the connected body of the tubular separation membrane 3, the end plug 20 and the end tube 4 is erected by inserting the lower end of the end tube 4 into the insertion hole 5 a of the support plate 5. The tie rod 14 is fitted with a sheath tube 14A. Next, the baffle 7 is placed on the sheath tube 14A while passing through the tie rod 14 and the connecting body from above, and then the sheath tube 14B is fitted onto the tie rod 14 from above. Next, the baffle 8 is placed on the sheath tube 14B through the tie rod 14 and the connecting body from above. Thereafter, the nut 14n is tightened to the upper end of the tie rod 14. As a result, a separation membrane unit 30 (FIG. 8) in which the tubular separation membrane 3, the connection body of the end plug 20 and the end tube 4, the support plate 5, and the baffles 7 and 8 are integrated by the tie rods 14 is formed. .

  The bracket 41 is removed from the housing 2.

  The separation membrane unit 30 is lifted by hanging the wire rope 32 on the eye bolt 8d of the baffle 8 of the separation membrane unit 30. The lifted separation membrane unit 30 is gradually lowered into the housing 2, and the protrusions 2c and the recesses 8c and the like are aligned and engaged, and then the separation membrane unit 30 is further lowered to support the support seat 2t. Place on top. Next, the wire rope 32 is removed. Next, the bracket 41 is fixed to the upper inner peripheral surface of the housing 2 with the bolt 42, then the bolt 43 is rotated forward and screwed downward, and the lower end thereof is pressed against the upper surface of the baffle 8, and the entire separation membrane unit 30 is moved downward. Press on. Thereby, the space between the support plate 5 and the support seat 2t is sealed. Thereafter, the separation membrane module 1 is configured by attaching the top flange 6B to the housing 2.

  In the separation membrane module 1 configured as described above, the fluid to be treated is introduced into the chamber 11 of the housing 2 from the inlet 9, and between the inner peripheral surface of the insertion hole 7 a of the baffle 7 and the outer peripheral surface of the end tube 4. Flows into the main chamber 13 through the gap, and flows out into the chamber 12 through the gap between the insertion hole 8 a of the baffle 8 and the end plug 20 after passing through the main chamber 13. While flowing through the main chamber 13, some components of the fluid to be treated permeate the tubular separation membrane 3 and are taken out from the tubular separation membrane 3 through the outflow chamber 16 and the outlet 6a. The fluid that has not permeated flows out of the separation membrane module 1 from the outlet 10.

  At the start of operation of the separation membrane module 1, it is preferable to gradually increase the opening of the supply valve of the fluid to be processed so that the supply pressure of the fluid to be processed into the separation membrane module 1 is gradually increased.

  The flow in the main chamber 13 and the flow in the tubular separation membrane 3 may be cocurrent or counterflow, and the inflow port 9 and the outflow port 10 of the fluid to be processed may be interchanged.

  In this embodiment, a large number of tubular separation membranes 3 are arranged in parallel and the membrane area is large, so that membrane separation is performed efficiently.

  In this embodiment, the end pipe 4 and the end plug 20 connected to the upper and lower ends of the tubular separation membrane 3 are inserted into the insertion holes 7a and 8a of the baffles 7 and 8, respectively. Therefore, even if the tubular separation membrane 3 vibrates or swings so that the end tube 4 and the end plug 20 come into contact with the inner peripheral surfaces of the insertion holes 7a and 8a, the zeolite membrane is not damaged and is stably operated over a long period of time. It can be performed.

  In this separation membrane module 1, when one or a small number of tubular separation membranes 3 are damaged, the fluid to be treated flows into the tubular separation membrane 3 and is mixed into the permeating fluid. When such damage to the tubular separation membrane occurs, after stopping the inflow of the fluid to be processed into the housing 2, the top cover 6B is removed from the housing 2, the bracket 41 is removed, and the wire rope 32 is attached to the eyebolt. 8d, the separation membrane unit 30 can be lifted and removed from the housing 2 for repair. In addition, you may replace | exchange for a new tubular separation membrane unit.

  In the above embodiment, the separation membrane unit 30 is pressed downward by the bracket 41 and the bolt 43, but the spring 50 is interposed between the top cover 6B and the baffle 8 in the accumulated state as shown in FIG. By doing so, the separation membrane unit 30 may be pressed downward. In FIG. 10, a guide rod 51 is suspended downward from the lower surface of the top cover 6 </ b> B, and a coil spring 50 is wound around the guide rod 51. The lower end of the coil spring 50 extends below the guide rod 51, and the lower end of the coil spring 50 is in contact with the upper surface of the baffle 8.

  Although the guide rod 51 is suspended from the top cover 6 </ b> B in FIG. 10, it may be erected upward from the baffle 8.

  This separation membrane module 1 is suitable for application to a membrane separation system in which a plurality of separation membrane modules 1 are installed in parallel or in which a plurality of series connection bodies of separation membrane modules 1 are arranged in parallel.

  FIG. 11 is a flowchart showing an example of a membrane separation system in which a plurality of series connection bodies of separation membrane modules 1 are arranged in parallel. In FIG. 11, serially connected bodies 100, 200, and 300 of the separation membrane module 1 are provided. Each of the serially connected bodies 100 to 300 is obtained by connecting four separation membrane modules 101 to 104, 201 to 204, and 301 to 304 in series. These separation membrane modules 101 to 304 all have the same configuration as the separation membrane module 1.

  In the serial connection body 100, the fluid to be treated is supplied to the first separation membrane module 101, the non-permeating fluid is introduced into the second separation membrane module 102, and the non-permeating fluid is The non-permeated fluid is introduced into the third-stage separation membrane module 103, and the non-permeable fluid is introduced into the fourth-stage separation membrane module 104, and the non-permeable fluid flows out through the pipe 400. The permeated fluid of each separation membrane module 101 to 104 is taken out via the pipe 410. The same processing is possible in each of the serially connected bodies 200 and 300.

  In this embodiment, a part of the series connection bodies, for example, the series connection body 300 is used as a spare line, and the other series connection bodies 100 and 200 are used for processing. For example, in the series connection body 100, the tubular separation membrane 3 is damaged. When it occurs, the supply of the fluid to be processed to the series connection body 100 is stopped, and instead, the fluid to be processed is supplied to the series connection body 300 to perform the processing, during which the serial connection body 100 is damaged. Repair the separation membrane module. In this way, even if some of the separation membrane modules are damaged, the operation of the entire membrane separation system can be continued stably.

  In FIG. 11, three series connected bodies 100, 200, and 300 are shown, but two or four or more series may be used. Further, the number of separation membrane modules constituting one series connection body may be other than illustrated. One separation membrane module may be installed instead of the series connection body. Further, in each module of FIG. 11, the fluid to be treated is introduced from the lower part of the module and discharged from the upper part, but the fluid to be treated introduced into the module may be either upper or lower, depending on the factory layout. It can be designed freely. For example, when a plurality of modules are connected and used, the fluids to be processed introduced into the modules may be in the order of top, bottom, top, and the like.

  FIG. 12 is a plan view of the membrane separation system in which the separation membrane unit 30 can be taken in and out by one crane facility 500 in the membrane separation system of FIG.

  The separation membrane module serially connected bodies 100, 200, 300 are arranged in a line on the factory space. Rails 501 and 502 are provided in the Y direction of FIG. 12, and the piers 503 and 504 are capable of traveling on the rails 501 and 502 in the Y direction. A boom 505 made of a pair of rails is installed between the upper ends of the bridge piers 503 and 504, and the trolley 506 can self-propell in the X direction on the boom 505. A wire hoisting machine (not shown) is installed on the trolley 506. The trolley 506 is positioned above any of the separation membrane modules 101 to 304, and the separation membrane unit 30 can be lifted and hung.

  Hereinafter, suitable materials for each member constituting the separation membrane module of the present invention will be described.

  Examples of the material of the end tube 4 and the end plug 20 include, but are not limited to, metals, ceramics, resins, and the like that do not allow fluid to permeate. The material of the baffles 7 and 8 and the joint pipe is usually a metal material such as stainless steel, but is not particularly limited as long as it has heat resistance and supply under separation conditions and resistance to permeation components. The material can be changed.

  The tubular separation membrane 3 preferably has a tubular porous support and a zeolite membrane as an inorganic separation membrane formed on the outer peripheral surface of the porous support. Examples of the material of the tubular porous support include inorganic sintered porous ceramics and metal sintered bodies containing silica, α-alumina, γ-alumina, mullite, zirconia, titania, yttria, silicon nitride, silicon carbide, and the like. A quality support may be mentioned. Among these, an inorganic porous support containing at least one of alumina, silica, and mullite is preferable. The average pore diameter of the surface of the porous support is not particularly limited, but those having a controlled pore diameter are preferred, usually 0.02 μm or more, preferably 0.05 μm or more, more preferably 0.1 μm. The above is usually in the range of 20 μm or less, preferably 10 μm or less, more preferably 5 μm or less.

Zeolite is crystallized on the surface of the porous support to form a zeolite membrane.
The main zeolite constituting the zeolite membrane usually contains a zeolite having an oxygen 6-10 membered ring structure, and preferably contains a zeolite having an oxygen 6-8 membered ring structure.

  Here, the value of n of the zeolite having an oxygen n-membered ring indicates the one having the largest number of oxygen among the pores composed of oxygen and T element forming the zeolite skeleton. For example, when there are 12-membered and 8-membered pores of oxygen, such as MOR type zeolite, it is regarded as a 12-membered ring zeolite.

  An example of a zeolite having an oxygen 6-10 membered ring structure is AEI, AEL, AFG, ANA, BRE, CAS, CDO, CHA, DAC, DDR, DOH, EAB, EPI, ESV, EUO, FAR, FRA, FER, GIS, GIU, GOO, HEU, IMF, ITE, ITH, KFI, LEV, LIO, LOS, LTN, MAR, MEP, MER, MEL, MFI, MFS, MON, MSO, MTF, MTN, MTT, MWW, NAT, NES, NON, PAU, PHI, RHO, RRO, RTE, RTH, RUT, SGT, SOD, STF, STI, STT, TER, TOL, TON, TSC, TUN, UFI, VNI, VSV, WEI, YUG, etc. There is.

  The zeolite membrane may be a single membrane of the zeolite, or the zeolite powder is dispersed in a binder such as a polymer to form a membrane, and the zeolite is fixed in a film form on various supports. A zeolite membrane composite may be used. The zeolite membrane may partially contain an amorphous component or the like.

  The thickness of the zeolite membrane is not particularly limited, but is usually 0.1 μm or more, preferably 0.6 μm or more, more preferably 1.0 μm or more. Moreover, it is 100 micrometers or less normally, Preferably it is 60 micrometers or less, More preferably, it is the range of 20 micrometers or less.

  However, the present invention may use a tubular separation membrane having a separation membrane other than the zeolite membrane.

  The outer diameter of the tubular separation membrane 3 is preferably 3 mm or more, more preferably 6 mm or more, further preferably 10 mm or more, preferably 20 mm or less, more preferably 18 mm or less, and further preferably 16 mm or less. If the outer diameter is too small, the strength of the tubular separation membrane may be insufficient and may be easily broken. If it is too large, the membrane area per module will be reduced.

  The length of the portion of the tubular separation membrane 3 covered with the zeolite membrane is preferably 20 cm or more, and preferably 200 cm or less.

  In the separation membrane module of the present invention, the tubular separation membrane may be a single tube type or a multi-tube type, and usually 1 to 3000, particularly 50 to 1200 are arranged, and the shortest distance between the tubular separation membranes is 2 mm to 10 mm. It is preferable to arrange so as to be. The size of the housing and the number of tubular separation membranes are appropriately changed depending on the amount of fluid to be processed.

  In the separation membrane module of the present invention, the target fluid to be separated or concentrated is not particularly limited as long as it is a gas or liquid mixture composed of a plurality of components that can be separated or concentrated by the separation membrane. However, it is preferably used for a gas mixture.

  For the separation or concentration, a separation or concentration method called a pervaporation method (pervaporation method) or a vapor permeation method (vapor permeation method) can be used. The pervaporation method is a separation or concentration method in which a liquid mixture is directly introduced into a separation membrane, so that a process including separation or concentration can be simplified.

  In the present invention, when the mixture to be separated or concentrated is a gas mixture composed of a plurality of components, examples of the gas mixture include carbon dioxide, oxygen, nitrogen, hydrogen, methane, ethane, ethylene, and propane. , Propylene, normal butane, isobutane, 1-butene, 2-butene, isobutene, toluene and other aromatic compounds, sulfur hexafluoride, helium, carbon monoxide, nitrogen monoxide, water, etc. The thing containing a component is mentioned. Among the mixture of these gas components, the gas component having a high permeance passes through the separation membrane and is separated, and the gas component having a low permeance is concentrated on the supply gas side.

DESCRIPTION OF SYMBOLS 1 Separation membrane module 2 Housing 2c Guide protrusion 3 Tubular separation membrane 4 End tube 5 Support plate 5h Dovetail groove 5r O-ring 5f, 8c Notch-shaped recess 6A Bottom cover 6B Top cover 6a Outlet 7, 8 Baffle 8d Eye bolt 9 Flow Inlet 10 Outlet 11, 12 Chamber 13 Main chamber 14 Tie rod (rod-shaped connecting member)
16 Outflow chamber 20 End plug 30 Separation membrane unit 32 Wire rope 41 Bracket 42, 43 Bolt 50 Coil spring 51 Guide rod 100, 200, 300 Series connection body of separation membrane module 500 Crane equipment

Claims (7)

A cylindrical housing with the cylindrical axis direction as the vertical direction;
A plurality of tubular separation membranes arranged vertically in the housing;
In the separation membrane module in which the fluid to be treated is supplied into the housing and the fluid that has permeated the tubular separation membrane is taken out.
A plurality of tubular separation membranes are integrated into a separation membrane unit,
An openable / closable portion is provided at the top of the housing,
The separation membrane unit can be taken in and out through the opening / closing part,
A support seat is provided on the lower inner peripheral surface of the housing, and the separation membrane unit is in contact with the support seat from above,
A separation membrane module, characterized in that dovetail grooves are provided around the bottom surface of the separation membrane unit, and a seal ring held in the dovetail groove is in close contact with the top surface of the support seat. In claim 1, an end tube is connected to one end of the tubular separation membrane,
The end pipe is supported by a support plate installed so as to cross the housing,
A baffle connected to the support plate via a rod-shaped connecting member is disposed on the other end side of the tubular separation membrane,
A separation membrane module, wherein a suspension member is provided on the baffle or the support plate.   3. The separation membrane module according to claim 2, wherein the opening / closing portion is a top cover provided on an upper portion of the housing.   The separation membrane module according to any one of claims 1 to 3, further comprising pressing means for pressing the separation membrane unit downward.   5. The pressing means according to claim 4, comprising: a bracket that is detachably attached to the inner peripheral surface of the upper surface of the housing; and a bolt that is provided on the bracket so as to be capable of screwing up and down. A separation membrane module, wherein a lower end is pressed against an upper surface of the separation membrane unit.   5. The separation membrane module according to claim 4, wherein the pressing means is a spring interposed between the opening / closing portion and the upper surface of the separation membrane unit in a stored state.   A membrane separation system in which a plurality of the separation membrane modules according to any one of claims 1 to 6 are installed, and crane equipment capable of lifting and hanging the separation membrane units of each separation membrane module is provided. Membrane separation system.

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