JP2020192482A - Detection method and device of damaged tubular separation membrane, and repair method of separation membrane module - Google Patents

Abstract

To provide a detection method and a device of a damaged tubular separation membrane, and a repair method of a separation membrane module, capable of detecting and repairing quickly a damaged tubular separation membrane.SOLUTION: A separation membrane module has a cylindrical housing 2, a plurality of tubular separation membranes 3 arranged in a longer direction of the housing 2, an end tube 4 connected to one end of the tubular separation membrane 3, and a support plate 5 for supporting the end tube 4. The end tube 4 is inserted into an insertion hole 5a provided on the support plate 5. An arm 33 with a Pitot tube 34 is swung, outflow fluid from each tubular separation membrane 3 is measured, and a damaged tubular separation membrane 3 is detected based on the measurement result.SELECTED DRAWING: Figure 4

Description

The present invention relates to a method and an apparatus for detecting a damaged tubular separation membrane in a separation membrane module used for separating a part of components from a fluid such as a solution or a mixed gas, and a method for repairing the separation membrane module.

A separation membrane module is known as a device for separating components in a solution or a 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 release 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, depressurizing the non-contact surface side to separate a specific component, or bringing a pressurized mixed gas into contact with the separation membrane. A method of separating a specific component is known.

In a multi-tube separation membrane module in which a plurality of tubular separation membranes are installed in a housing, when a part, for example, one tubular separation membrane is damaged and the fluid to be treated leaks to the secondary side (permeation side). Conventionally, it is necessary to stop the supply of the fluid to be treated to the separation membrane module, observe the tubular separation membrane, and find a damaged tubular separation membrane (Patent Documents 1 and 2).

Patent Document 1 describes that when a part of the tubular separation membrane is damaged, the tubular separation membrane is sealed with an epoxy resin. Patent Document 2 describes that a closing member is attached to a permeation fluid extraction portion of a damaged tubular separation membrane.

Japanese Unexamined Patent Publication No. 51-32487 Japanese Unexamined Patent Publication No. 2016-155096

An object of the present invention is to provide a method and an apparatus for detecting a damaged tubular separation membrane and a method for repairing a separation membrane module, which can quickly detect and repair a damaged tubular separation membrane.

The method for detecting a damaged tubular separation membrane of the present invention is a method for detecting a damaged tubular separation membrane in a separation membrane module, wherein the separation membrane module includes a tubular housing and a plurality of tubulars arranged in the housing. With a separation membrane, the fluid to be treated is supplied into the housing, and the fluid that has passed through the tubular separation membrane flows out from the outlet of the tubular separation membrane or the fluid guide member in which the ends of the tubular separation membrane are connected. , The outlet is a multi-tube separation membrane module arranged flush with respect to the plane perpendicular to the axial direction of the housing, supplies gas into the housing, and along the outlet. The fluid flow velocity measuring device is moved to measure the fluid flowing out from each outlet, and the damaged tubular separation membrane is detected based on the measurement result.

In one aspect of the present invention, a plurality of the fluid flow velocity measuring instruments are installed on the base member, and the fluid flow velocity measuring instruments are moved along the outlet by moving the base member.

In one aspect of the present invention, the housing is cylindrical, the base member extends in the radial direction of the housing, and a plurality of the fluid flow velocity measuring instruments are attached to the base member in the extending direction. The fluid flow velocity measuring device is moved along the outlet by rotating the base member with the axial center position of the housing as the center of rotation, which are installed at intervals.

The damaged tubular separation membrane detection device of the present invention is a damage tubular separation membrane detection device for detecting a damaged tubular separation membrane in the separation membrane module, and the separation membrane module includes a tubular housing and a tubular housing. It has a plurality of tubular separation membranes arranged in the housing, the fluid to be treated is supplied into the housing, and the fluid that has passed through the tubular separation membrane is the tubular separation membrane or the end portion of the tubular separation membrane. A multi-tube separation membrane module that flows out from the outlets of a series of fluid guide members and is arranged flush with the plane perpendicular to the axial direction of the housing. It has a base member that can move along the outlet, and a fluid flow velocity measuring device provided on the base member that measures the fluid flowing out from the outlet.

In one aspect of the invention, the housing is cylindrical, the base member extends in the radial direction of the housing, and a plurality of the fluid flow velocity measuring instruments are attached to the base member in the extending direction. The base members are installed at intervals, and the base members are supported by the support members so as to be rotatable around the axial center position of the housing.

In one aspect of the present invention, a drive device for swirling the base member is provided.

The method of repairing the separation membrane module of the present invention is a method of repairing a tubular separation membrane in which damage is detected by the method of detecting a damaged tubular separation membrane of the present invention, or a closing member at the outlet of a fluid guide member in which the ends of the tubular separation membrane are connected. It is characterized by wearing.

When a part of the tubular separation membrane in the multi-tube separation membrane module is damaged, the fluid leaks into the tubular separation membrane, and therefore flows out from the tubular separation membrane or the outlet of the guide member connected to the tubular separation membrane. The fluid flow velocity increases.

According to the method and apparatus for detecting a damaged tubular separation membrane of the present invention, the fluid flowing out from the tubular separation membrane or the outlet of the guide member connected to the tubular separation membrane is measured, and the damaged tubular separation membrane is detected from this measurement result. ..

According to such a detection method and apparatus, a damaged tubular separation membrane can be quickly detected.

Further, by blocking the outlet from the damaged tubular separation membrane with a closing member, the fluid to be treated leaked to the secondary side of the damaged tubular separation membrane becomes a permeation fluid of another healthy tubular separation membrane. It is prevented from being mixed. Therefore, even if a part of the tubular separation membrane is damaged, it is possible to block the mixing of the fluid to be treated into the permeated fluid in a short time and restart the operation of the separation membrane module.

It is sectional drawing along the housing axis direction of the separation membrane module which describes the method and apparatus which concerns on embodiment. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is a sectional view taken along line III-III of FIG. It is sectional drawing of the lower part of the separation membrane module explaining the method and apparatus which concerns on embodiment.

An example of a separation membrane module to which the present invention is applied will be described with reference to FIGS.

The separation membrane module 1 is provided in a cylindrical housing 2 whose axial direction is vertical, a plurality of tubular separation membranes 3 arranged in a direction parallel to the axial center line of the housing 2, and a lower portion inside the housing 2. The support plate 5 is attached, the bottom cover 6A attached to the lower end of the housing 2 and the top cover 6B attached to the upper end, and the first one arranged in the lower part and the upper part in the housing 2 in parallel with the support plate 5. It has a baffle (rectifying plate) 7, a second baffle (rectifying plate) 8, and the like. The first baffle 7 is arranged above the support plate 5.

In this embodiment, outward flanges 2a, 2b, 6b, and 6c are provided on the lower and upper end sides 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 done. The peripheral edge of the support plate 5 is supported by a support seat 2t provided around the inner peripheral surface of the housing 2. A seal member is interposed between the outer peripheral portion of the lower surface of the support plate 5 and the upper surface of the support seat 2t.

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 of tubular separation membranes are actually provided as shown in FIG. Further, a tubular separation membrane connector in which two or more tubular separation membranes 3 are connected by a joint tube (not shown) may be used.

An inflow port 9 for the fluid to be processed is provided on the outer peripheral surface of the lower portion of the housing 2, and an outflow port 10 for the impermeable 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. The space between the baffles 7 and 8 is the main chamber 13 for membrane separation.

A plurality of rods 14 are erected from the support plate 5 at the bottom, and the baffles 7 and 8 are supported by the rods 14. A male screw is engraved on the lower end of the rod 14, and is screwed into the female screw hole of the support plate 5. The baffles 7 and 8 are supported at a predetermined height by the rod 14. The number of baffles is not limited to this embodiment, and three or more baffles may be used.

A sealing member such as an O-ring, V-packing, or C-ring may be interposed between the outer peripheral surfaces of the baffles 7 and 8 and the inner peripheral surface of the housing 2.

The baffles 7 and 8 are provided with circular insertion holes 7a and 8a for inserting the tubular separation membrane 3, and the connecting body of the tubular separation membrane 3, the end tube 4 and the end plug 20 is provided with the insertion holes 7a. , 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 around the entire circumference with the outer peripheral surface.

The support plate 5 is provided with an insertion hole 5a into which the lower end of the end tube 4 connected to the tubular separation membrane 3 is inserted.

The lower portion of the insertion hole 5a is a small hole that penetrates the support plate 5. As a result, the pipe hole 4a of each end pipe 4 communicates with the outflow chamber 16 between the bottom cover 6A and the support plate 5 via the insertion hole 5a. The bottom cover 6A is provided with a separated permeation fluid outlet 6a.

Although not shown, a groove is provided on the outer peripheral surface near the lower end of the end tube 4, and an O-ring made of fluororubber, fluororesin, or the like is attached. Further, a flat gasket is installed on the lower end surface of the end pipe 4, or a groove concentric with the pipe hole 4a of the end pipe 4 is provided around the end pipe 4, and an O-ring is attached. These gaskets and O-rings seal the outer surface of the end pipe 4 and the insertion hole 5a. In addition, only one of the O-ring on the outer peripheral surface of the end pipe 4 and the gasket or O-ring on the lower end surface may be provided.

The upper end of the end tube 4 has a small diameter and is inserted into the lower part of the tubular separation membrane 3. An O-ring for fixing the position may be attached to the groove provided around the outer peripheral surface of the small diameter portion. Further, a gasket or an O-ring is interposed between the lower end surface of the tubular separation membrane 3 and the stepped surface of the end tube 4. The connection portion between the end tube 4 and the tubular separation membrane 3 may be sealed by using a heat-shrinkable tube without using the gasket or O-ring as described above, or by using a gasket or O-ring, and further. A heat shrink tube may be used.

The end plug 20 is connected to the upper end of the tubular separation membrane 3. The end plug 20 has a columnar shape or a shape obtained by cutting a part of the columnar shape, and seals the upper end of the tubular separation membrane 3. At the lower end of the end plug 20, a small diameter portion inserted into the tubular separation membrane 3 is provided. The end plug 20 and the tubular separation membrane 3 are sealed by an O-ring or a gasket. 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 the like, or a heat-shrinkable tube may be further used in addition to using an O-ring or the like.

In order to reduce the weight of the end plug 20, a recess 20v is provided from the upper end surface of the end plug 20. A drain hole for communicating the bottom of the recess 20v and the side peripheral surface of the end plug 20 may be provided.

In this embodiment, since the end plug 20 is arranged 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 hanging.

However, in the present invention, the end tube 4 and the support plate 5 may be arranged on the upper end side of the tubular separation membrane 3, and the end plug 20 may be arranged on the lower end side of the tubular separation membrane 3. In this case, by providing an urging member such as a spring for urging the end plug 20 upward, the end faces thereof are pressed against the tubular separation membrane 3, the end plug 20, and the end pipe 4. It is preferable to apply a load.

In the separation membrane module 1 configured in this way, the fluid to be treated is introduced into the chamber 11 of the housing 2 from the inflow port 9 and between the inner peripheral surface of the insertion hole 7a of the baffle 7 and the outer peripheral surface of the end pipe 4. It flows into the main chamber 13 through the gap of the main chamber 13, and after passing through the main chamber 13, flows out to the chamber 12 through the gap between the insertion hole 8a of the baffle 8 and the end plug 20. While flowing through the main chamber 13, some components of the fluid to be treated permeate through the tubular separation membrane 3 and are taken out from the tubular separation membrane 3 via 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. The outlet 6a may be installed on the housing side in contact with the outflow chamber 16 instead of the bottom cover 6A.

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

The separation membrane module 1 may be used with the top cover 6B side facing up as shown in FIG. 1, or may be used with the bottom cover 6A side facing up. Further, the separation membrane module 1 may be installed and used horizontally so that the direction connecting the bottom cover 6A and the top cover 6B is substantially horizontal.

In this separation membrane module 1, when one or a small number of tubular separation membranes 3 are damaged or the seal is incomplete, the fluid to be treated flows into the tubular separation membrane 3 and mixes with the permeated fluid. Will be done. When such damage to the tubular separation membrane occurs, the damaged tubular separation membrane is detected by using the damaged tubular separation membrane detection device 30 as follows.

FIG. 4 is a cross-sectional view of the lower part of the separation membrane module in which the detection device 30 for detecting the damaged tubular separation membrane is installed.

The detection device 30 is attached to a vertical shaft 32, a rotation drive device 31 that rotationally drives the shaft 32 around its axis, and an upper end portion of the shaft 32, and is capable of turning extending in the horizontal direction. It includes an arm 33 as a base member and a pitot tube 34 as a fluid flow velocity measuring device attached to the arm 33.

The rotation drive device 31 is manually or driven by a step motor or the like, and is configured so that the turning start position of the arm 33 and the phase of the arm 33 in the middle of turning can be accurately specified.

The detection device 30 is arranged so that the axis of the shaft 32 is coaxial with the axis of the cylindrical housing 2, and the arm 33 extends in the radial direction of the housing 2.

The Pitot tube 34 rises vertically upward from the arm 33. A large number of Pitot tubes 34 are provided at regular intervals in the longitudinal direction of the arm 33. When installing a Pitot tube, it is preferable to design one of the outlets, for example, the outlet that is the center (axis) of all outlets, as the starting point of measurement, but if there is no outlet at the center, it is preferable. The pitot tube facing the central outlet may be omitted.

When the distance between the centers of the adjacent nearest tubular separation membranes 3 is L, the arrangement pitch of the Pitot tubes 34 is preferably 10 to 60% of L, particularly about 15 to 40%.

In this embodiment, the height of the upper end of each Pitot tube 34 is uniform. The upper end of each pitot tube 34 is close to the lower surface of the support plate 5 (preferably, the vertical level difference between the lower surface of the support plate 5 and the upper end of the pitot tube 34 is about 1 to 100 mm, particularly about 5 to 40 mm. ) It is preferable that the detection device 30 is arranged.

In order to adjust the position of the detection device 30, in this embodiment, the detection device 30 moves the rotation drive device 31 in two horizontal directions (XY directions) to adjust the position in the XY directions. The XY stage 35 and the Z stage 36 for vertically adjusting the position of the rotary drive 31 in the vertical and vertical directions are provided.

To detect a damaged tubular separation membrane or an incomplete seal using this detection device 30, the bottom cover 6A is removed, the detection device 30 is installed as shown in FIG. 4, and the inflow port 9 is closed. In this state, gas is supplied from the outlet 10 at a constant pressure, the rotary drive device 31 is operated, the arm 33 is swiveled around the axis of the housing 2 at a constant angular velocity, and each pitot tube 34 is inserted into the arm 33. The gas (fluid) flowing out from the hole 5a is measured. The fluid flow velocity is determined from the pressure of the fluid flowing out from the outlet measured by the Pitot tube. It is usually obtained from dynamic pressure or differential pressure by Bernoulli's theorem.

As the gas, nitrogen, air and the like can be used, but the gas is not limited to this. When nitrogen is used, it is preferable to supply it from a cylinder to the outlet 10 at a constant pressure.

When the Pitot tube 34 passes below the insertion hole 5a, the fluid flow velocity becomes a large value, and when it passes below between the insertion holes 5a, 5a, the fluid flow velocity becomes a small value.

When the pitot tube 34 on the most central side (shaft 32 side) is the first pitot tube and the pitot tube on the outermost outer side (tip side of the arm 33) is numbered as the nth pitot tube, all tubular separation membranes are formed. When 3 is sound, the fluid flow velocity obtained from the 1st to nth Pitot tubes fluctuates regularly with the rotation of the arm 33. Further, this fluctuation width (amplitude) is constant for each Pitot tube.

When a part of the tubular separation membrane 3 is damaged, gas leaks into the tubular separation membrane 3, so that the flow velocity of the gas flowing out from the insertion hole 5a into which the tubular separation membrane 3 is inserted is sound. It is larger than the outflow gas flow velocity from the insertion hole 5a of the (undamaged) tubular separation membrane.

The position of the insertion hole 5a having a larger fluid flow velocity than the others can be specified from the phase of the arm 33 at that time and the number of the pitot tube 34. In principle, the damaged tubular separation membrane 3 can be detected by rotating the arm 33 once. Alternatively, by rotating the arm 33 a plurality of times and averaging the data, it is possible to improve the detection accuracy of the damaged tubular separation membrane.

After detecting the damaged tubular separation membrane in this way, the closing member is attached to the insertion hole 5a into which the tubular separation membrane 3 is inserted, and then the bottom cover 6A is reattached for steady operation. Return to.

In the above description, the fluid (gas) flow velocity is determined by the Pitot tube, but other current meters such as a heat ray type current meter may be used.

Hereinafter, suitable materials and the like of 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 those that do not allow fluid to permeate, such as metal, ceramics, and resin, but the material is not limited thereto. The materials of the baffles 7 and 8 and the joint pipe are usually metal materials such as stainless steel, but are not particularly limited as long as they have heat resistance and supply under separation conditions and resistance to permeation components, and depending on the application, other materials such as resin materials. The material can be changed to.

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. The material of this tubular porous support is an inorganic porous body of a ceramics sintered body or a metal sintered body containing silica, α-alumina, γ-alumina, mullite, zirconia, titania, yttria, silicon nitride, silicon carbide and the like. Quality support can be mentioned. Among them, 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 it is preferably that the pore diameter is controlled, and is usually 0.02 μm or more, preferably 0.05 μm or more, and more preferably 0.1 μm. As described above, the range is usually 20 μm or less, preferably 10 μm or less, and more preferably 5 μm or less.

Zeolites are 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.

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

To give an example of a zeolite having an oxygen 6-10-membered ring structure, 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, TOR, TON, TSC, TUN, UFI, VNI, VSV, WEI, YUG, etc. There is.

The zeolite membrane may be a membrane made of zeolite alone or a membrane in which the zeolite powder is dispersed in a binder such as a polymer, or the zeolite is fixed in a film shape on various supports. It may be a zeolite membrane composite. The zeolite membrane may contain a part of amorphous components and 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, and more preferably 1.0 μm or more. Further, it is usually 100 μm or less, preferably 60 μm or less, more preferably 20 μm or less, and more preferably 10 μm or less.

However, in the present invention, a tubular separation membrane having a separation membrane other than the zeolite membrane may be used.

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

The length of the portion of the tubular separation membrane 3 covered with the zeolite membrane is preferably 20 cm or more, 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 pieces, particularly 50 to 2000 pieces are arranged, and the shortest distance between the tubular separation membranes is 2 mm to 10 mm. It is preferable that they are arranged 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 treated.

In the separation membrane module of the present invention, the fluid to be treated to be separated or concentrated is not particularly limited as long as it is a mixture of a gas or a liquid composed of a plurality of components that can be separated or concentrated by the separation membrane, and any mixture. Although it may be, it is preferable to use it for a mixture of gases.

For the separation or concentration, a separation or concentration method called a pervaporation method (osmotic vaporization method) or a vapor permeation method (steam permeation method) can be used. Since the pervaporation method is a separation or concentration method in which a mixture of liquids is directly introduced into a separation membrane, a process including separation or concentration can be simplified.

In the present invention, when the mixture to be separated or concentrated is a mixture of gases composed of a plurality of components, the mixture of gases includes, for example, carbon dioxide, oxygen, nitrogen, hydrogen, methane, ethane, ethylene, and propane. , Propylene, normal butane, isobutene, 1-butene, 2-butene, isobutene, toluene and other aromatic compounds, sulfur hexafluoride, helium, carbon monoxide, nitrogen monoxide, water, etc. Examples include those containing ingredients. Of the mixture consisting of these gas components, the gas component having a high permeence permeates the separation membrane and is separated, and the gas component having a low permeence is concentrated on the supply gas side.

1 Separation membrane module 2 Housing 3 Tubular separation membrane 4 End pipe 5 Support plate 5a Insert hole 5c Large hole 6A Bottom cover 6B Top cover 6a Outlet 7,8 Baffle 7a, 8a Insertion hole 9 Inflow port 10 Outlet 11,12 Room 13 Main room 14 Rod 16 Outflow room 20 End plug 30 Detection device 31 Rotation drive device 32 Shaft 33 Arm 34 Pitot tube 35 XY stage 36 Z stage

Claims (7)

In a method of detecting a damaged tubular separation membrane in a separation membrane module,
The separation membrane module has a tubular housing and
It has a plurality of tubular separation membranes arranged in the housing.
The fluid to be treated is supplied into the housing, and the fluid that has passed through the tubular separation membrane flows out from the outlet of the tubular separation membrane or the fluid guide member in which the ends of the tubular separation membrane are connected.
The outlet is a multi-tube separation membrane module arranged flush with respect to a plane perpendicular to the axial direction of the housing.
While supplying gas into the housing,
A fluid flow velocity measuring device is moved along the outlet to measure the fluid flowing out from each outlet.
A method for detecting a damaged tubular separation membrane, which comprises detecting a damaged tubular separation membrane based on the measurement result. The damaged tubular separation according to claim 1, wherein a plurality of the fluid flow velocity measuring instruments are installed on a base member, and the fluid flow velocity measuring instruments are moved along the outlet by moving the base member. Membrane detection method. The housing is cylindrical and the base member extends radially in the housing.
A plurality of the fluid flow velocity measuring instruments are installed on the base member at intervals in the extending direction.
The damaged tubular separation membrane according to claim 2, wherein the fluid flow velocity measuring device is moved along the outlet by rotating the base member with the axial center position of the housing as the center of rotation. Detection method. A device for detecting a damaged tubular separation membrane for detecting a damaged tubular separation membrane in a separation membrane module.
The separation membrane module has a tubular housing and
It has a plurality of tubular separation membranes arranged in the housing.
The fluid to be treated is supplied into the housing, and the fluid that has passed through the tubular separation membrane flows out from the outlet of the tubular separation membrane or the fluid guide member in which the ends of the tubular separation membrane are connected.
The outlet is a multi-tube separation membrane module arranged flush with respect to a plane perpendicular to the axial direction of the housing.
The detection device includes a base member that can move along the outlet and
A device for detecting a damaged tubular separation membrane, which comprises a fluid flow velocity measuring device provided on the base member for measuring a fluid flowing out from the outlet. The housing is cylindrical
The base member extends in the radial direction of the housing.
A plurality of the fluid flow velocity measuring instruments are installed on the base member at intervals in the extending direction.
The device for detecting a damaged tubular separation membrane according to claim 4, wherein the base member is rotatably supported by a support member around the axial center position of the housing. The device for detecting a damaged tubular separation membrane according to claim 5, further comprising a driving device for rotating the base member. A blocking member is provided at the outlet of the tubular separation membrane in which damage is detected by the method for detecting a damaged tubular separation membrane according to any one of claims 1 to 3 or a fluid guide member in which the ends of the tubular separation membrane are connected. A method of repairing a separation membrane module, which is characterized by mounting.

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