CN212440802U - Non-damage repair device for hollow fiber membrane filaments with linings by internal connection method - Google Patents

Abstract

The utility model provides a non-damaged prosthetic devices of inscription method non-tape lining hollow fiber membrane silk. The device includes: an inner support member (3), an adhesive member (4), a first hollow fiber membrane thread (1), and a second hollow fiber membrane thread (2); the first hollow fiber membrane yarn (1) and the second hollow fiber membrane yarn (2) are two sections of hollow fiber membrane yarns to be repaired, one end of the inner support component (3) is inserted into the inner cavity of the first hollow fiber membrane yarn (1), the other end of the inner support component is inserted into the inner cavity of the second hollow fiber membrane yarn (2), the two sections of hollow fiber membrane yarns are in primary butt joint at the middle position of the inner support component (3) and certain gaps are reserved, and the end parts of the two sections of hollow fiber membrane yarns are connected into a whole after the bonding component (4) is embedded into the gaps. The utility model discloses a membrane silk fracture damage can thoroughly be restoreed to the device under the prerequisite that does not lose membrane effective filtration area to effectively ensure membrane system and produce water quality of water, and improve the life of hollow fiber UF or MBR membrane.

Description

Non-damage repair device for hollow fiber membrane filaments with linings by internal connection method

Technical Field

The utility model relates to a membrane silk restoration technology field especially relates to a not damaged prosthetic devices of inscription method non-tape lining hollow fiber membrane silk.

Background

Hollow fiber membranes are the most prevalent Membrane structures of ultrafiltration (UF, both pressure and submerged) and MBR (Membrane Bioreactor). Wherein, the ultrafiltration is widely used for removing suspended matters and colloid in water and separating and concentrating materials; MBR is a new sewage treatment and recycling technology which organically combines membrane separation technology and traditional biochemical technology. Compared with the non-membrane process, the membrane water treatment technology has the outstanding advantages of small system floor area, good quality of produced water, high automation degree, continuous and stable operation and the like, and is a water treatment technology with great development potential and advanced technology.

The hollow fiber membrane needs to be intermittently or continuously blown by air in the operation process, and the gas-water two-phase flow formed by aeration forms continuous shearing force vertical to the filtering flow direction on the surface of the membrane so as to delay membrane pollution and maintain the membrane operation flux. Because the mechanical strength of the unlined hollow fiber membrane is limited (taking PVDF as an example, the breaking strength of a monofilament is usually 3-6N), the membrane filaments are easily broken due to the axial tension formed by high-strength air blowing and the concentration of root stress. A membrane filament number of breaks exceeding a certain ratio will result in: the system water inflow or sludge mixed liquid enters the produced water collecting system through the membrane yarn breaking point, so that the quality of the produced water of the system is deteriorated.

The existing simple membrane filament repairing measures can reduce the effective filtering area of the membrane element, and higher operation pressure is needed for maintaining rated water output. The simple repair method of the non-lined hollow fiber membrane yarn in the prior art mainly comprises the following steps:

1: plugging: breaking the broken membrane wires from the sealing glue at the root parts of the two ends, and then plugging the residual membrane wire holes by using a plugging needle (or a bamboo stick):

2: and (3) knotting: and knotting the two sections of membrane wires at the breakpoint.

The simple repair method of the unlined hollow fiber membrane yarn in the prior art has the defects that; the existing plugging or knotting repair measures of the hollow fiber membrane element without the lining can reduce the effective filtration area of the membrane element, increase the operating pressure and energy consumption of the membrane system and reduce the service life of the membrane element.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a not damaged prosthetic devices of lining hollow fiber membrane silk is not taken to inscription method to overcome prior art's problem.

In order to achieve the purpose, the utility model adopts the following technical scheme.

A non-damage repair device of inscription method non-lined hollow fiber membrane silk comprises: an inner support member (3), an adhesive member (4), a first hollow fiber membrane thread (1), and a second hollow fiber membrane thread (2);

the first hollow fiber membrane yarn (1) and the second hollow fiber membrane yarn (2) are two sections of hollow fiber membrane yarns to be repaired, one end of the inner supporting component (3) is inserted into the inner cavity of the first hollow fiber membrane yarn (1), the other end of the inner supporting component is inserted into the inner cavity of the second hollow fiber membrane yarn (2), the two sections of hollow fiber membrane yarns are preliminarily butted at the middle position of the inner supporting component (3) and are reserved with a certain gap, and the end parts of the two sections of hollow fiber membrane yarns are bonded into a whole after the bonding component (4) is embedded into the gap.

Preferably, the inner support member (3) is a precise tubular structure, a positioning center line I is arranged in the middle of the periphery of the inner support member (3), and anti-falling rings II are respectively arranged at two ends of the periphery.

Preferably, the inner support member (3) is a specially-made integral member; or, the structure is simplified into a hollow fiber capillary structure with a smooth outer wall, and the length of the hollow fiber capillary structure is 30-40 mm.

Preferably, the bonding means (4) is a transient adhesive which can be handled with water and which is flexible after setting.

By the above-mentioned the embodiment of the utility model provides a technical scheme can see out, the utility model discloses a not damaged prosthetic devices of inscription method non-tape lining hollow fiber membrane silk can thoroughly repair the membrane silk damage under the prerequisite that does not lose membrane effective filtration area, can improve the life of hollow fiber UF and MBR membrane when effectively guaranteeing membrane system product water quality of water.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a diagram illustrating an implementation effect of a nondestructive repair device for an inscription method unlined hollow fiber membrane yarn according to an embodiment of the present invention;

fig. 2 is a structural diagram of an inner support member according to an embodiment of the present invention;

fig. 3-5 are schematic views illustrating the operation process of the non-damage repair of the internally-connected unlined hollow fiber membrane filament according to the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

For the convenience of understanding the embodiments of the present invention, the following description will be given by way of example only with reference to the accompanying drawings, and the embodiments are not limited thereto.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

The embodiment of the utility model provides a repair simple and easy measure can cause the drawback that membrane element structure damage, membrane area reduce to current non-tape lining hollow fiber membrane silk, the utility model provides an inscribe method non-tape lining hollow fiber membrane silk not damaged prosthetic devices, the device's restoration principle is to insert two sections membrane silk inner chambers of waiting to restore respectively with the both ends of dedicated interior support component, makes the membrane silk dock in the support component intermediate position, bonds two sections membrane silks into an organic whole through dedicated binder in the twinkling of an eye.

The embodiment of the utility model provides a not damaged prosthetic devices's of lining hollow fiber membrane silk structure chart is taken to inscription method is provided and is shown as figure 1, include: a first hollow fiber membrane thread 1, a second hollow fiber membrane thread 2, an inner support member 3 and an adhesive member 4.

The first hollow fiber membrane filament 1 and the second hollow fiber membrane filament 2 are two sections of hollow fiber membrane filaments to be repaired, one end of the inner support component 3 is inserted into the inner cavity of the first hollow fiber membrane filament 1, and the other end of the inner support component is inserted into the inner cavity of the second hollow fiber membrane filament 2. The method comprises the steps that a first hollow fiber membrane wire 1 and a second hollow fiber membrane wire 2 are moved oppositely, so that the two sections of hollow fiber membrane wires are initially butted at the middle position of an inner support component 3 and a certain gap is reserved, after a bonding component 4 is embedded into the gap, the two sections of hollow fiber membrane wires are fully butted, and finally, the end parts of the two sections of hollow fiber membrane wires are bonded into a whole through the bonding component 4.

In practical application, the lengths of the first hollow fiber membrane filaments and the second hollow fiber membrane filaments inserted into the inner support member 3 are slightly less than 1/2 of the total structural length of the inner support member 3, so as to ensure that two sections of hollow fiber membrane filaments are initially butted and leave a proper gap, and facilitate subsequent embedding of an adhesive.

The embodiment of the utility model provides an above-mentioned structure of interior support component 3 is shown in figure 2, has both played the effect that preliminary fixed two sections are waited to restore the hollow fiber membrane silk, has completely remain the inside rivers passageway of hollow fiber membrane silk again.

The inner support part 3 can be a specially-made integrated precise part and needs to be arranged and opened before processing. The whole is a tubular structure, a positioning central line I is arranged in the middle of the periphery, anti-falling rings II are arranged at two ends of the periphery, for example, an anti-falling ring II is arranged at 1/4 and 3/4 which are positioned at the length of a half part respectively, and 4 anti-falling rings II and a positioning central line I are arranged on the whole inner support part 3. The positioning center line I is used for facilitating an operator to observe and control the insertion depth of the inner support component, and ensuring that two sections of membrane wires are butted at the middle position; anticreep ring II's effect is the frictional force of support component and hollow fiber membrane silk inner wall in the increase and decrease, more is favorable to preliminary fixed before the bonding, simultaneously, prevents itself at the inside removal of the hollow fiber membrane silk that is restoreed.

In practical application, in order to reduce the manufacturing cost, the structure of the inner support part 3 can be further simplified into a hollow fiber capillary tube structure, and the capillary support tube is cut into small sections with the length of about 30-40 mm before use.

The bonding part 4 can adopt a high-strength instant bonding agent, has the characteristics of water carrying operation, certain flexibility after curing, high bonding strength, good durability and the like, has moderate curing time, and also has good bonding mechanical property to bonded parts in a wet state.

Based on the devices shown in fig. 1 and fig. 2, fig. 3-fig. 5 are schematic diagrams of the operation process of the non-damage repair of the internally-connected unlined hollow fiber membrane filament according to the embodiment of the present invention, and the operation steps are as follows:

firstly, the integrity detection device is used for positioning the specific position of the broken and broken membrane wire inside the element, and then the repairing operation is carried out. The operation steps of membrane silk repair are as follows:

1. cutting the hollow fiber capillary support tube into small sections with the length of 30-40 mm, and of course, directly adopting the specially-made precise integrated part;

2. inserting two ends of an inner support part into inner cavities of two sections of hollow fiber membrane filaments to be connected respectively until the two sections of hollow fiber membrane filaments form a virtual joint at the middle position of the outer side of the support part, controlling the butt joint gap to be 0.1-0.2 mm, positioning the inner support part, primarily fixing the repaired membrane filaments, and maintaining a water flow channel inside the hollow fiber membrane filaments;

3, draining the surface and the cross section of the two sections of hollow fiber membrane yarns, embedding a special low-viscosity instant adhesive into the butt joint gap of the hollow fiber membrane yarns to enable the special low-viscosity instant adhesive to fully permeate into the cross section gap of the membrane yarns, and then moving the two sections of membrane yarns oppositely to enable the end faces of the membrane yarns to fully contact.

4. And (3) finishing the repair of the section of the membrane wire when the adhesive reaches the rated adhesive strength, wherein the initial curing time of the adhesive used in the method is about 5-8 seconds.

The repair technology can reconnect damaged and broken hollow fiber membrane yarns, the bonding strength exceeds the breaking strength of the PVDF hollow fiber membrane yarns, and meanwhile, the reliability and the durability are extremely high.

The hollow fiber membrane filament repair of the damaged membrane element is finished through a series of operations such as online integrity detection → element dismantling → offline integrity detection → filament breakage repair → element assembly and system recovery, and the damaged membrane element can be put into operation again through the element assembly and the system recovery.

In order to fully verify the reliability and durability of the internal connection method non-lined hollow fiber membrane yarn repairing technology, a hollow fiber membrane yarn repairing and continuous working condition operation test is set and implemented, and the specific test process is as follows:

the method comprises the steps of taking one curtain type MBR membrane element of a certain brand, wherein 1450 PVDF non-lined hollow fiber membrane filaments are contained in each membrane element, and the effective length is 1400 mm;

respectively taking 40 membrane filaments at 5 different positions in the width direction of the membrane element, wherein the total number of the membrane filaments is 200, and cutting the membrane filaments at a position 120mm away from the root of the lower end by using a wallpaper cutter;

thirdly, the artificial broken filaments of the membrane element are completely repaired (connected) by the internal connection method;

the restored curtain type MBR membrane elements are filled with the other 18 membrane elements of the same model together, and the MBR membrane elements continuously run under working conditions, so that the MBR aeration strength takes a higher value: 130Nm3/m 2/h.

Taking out the test membrane element every 3-6 months, observing the integrity of the repaired membrane silk, and counting the disintegration quantity and damage condition of the membrane silk at the repaired position.

The experimental statistics are as follows:

table 1 statistical table of operating integrity of repaired membrane filaments

The test is mainly used for counting the disintegration condition of the repaired membrane filaments at the original breakpoint repairing positions at different time nodes, so as to investigate the reliability and durability of the repairing method.

The number of the membrane filaments tested by the repair method is 200, the number of the natural filament breakage refers to the number of the membrane filaments broken at the non-repair part, and the natural filament breakage rate calculated by the number of the natural filament breakage is an important reference index for representing the tensile strength and the service life of the non-lined hollow fiber membrane filaments.

The total number of membrane filaments is M, and M is 200; the number of naturally broken filaments is m; natural filament breakage rate: k 1; accumulating the disintegration number n; disintegration rate k2

Then; the natural yarn breakage rate k1 is M/M; the disintegration rate k2 is n/(M-M).

Analysis and conclusion of experimental data:

as shown in table 1, the membrane element had a cumulative natural filament breakage rate of 5% after 4.5 years of operation. The tensile strength and the service life of the PVDF hollow fiber membrane filaments without the lining are required to be improved, and meanwhile, the hollow fiber membrane filament repairing technology is very important for maintaining the continuous and stable operation of an MBR membrane system;

the 200 hollow fiber membrane filaments repaired by the inscription method do not disintegrate in the test period (within 4.5 years), which shows that the method has very good reliability and durability; the repairing technology has high bonding strength and is far higher than the breaking strength of the PVDF hollow fiber membrane filaments without linings, the breaking strength of the repaired membrane filaments is detected by an instrument, and the position of the breaking point is observed and compared, so that the judgment can be verified.

The inscription method can obtain ideal bonding strength, and meanwhile, the reliability and durability of the repair method are fully verified through a continuous running test under a working condition, so that the inscription method is an ideal non-damage repair technology for the non-lined hollow fiber membrane yarns.

To sum up, the utility model discloses an inscription method non-tape lining hollow fiber membrane silk not damaged prosthetic devices can thoroughly restore the membrane silk damage under the prerequisite that does not lose membrane effective filtration area, can improve the life of hollow fiber UF and MBR membrane when effectively guaranteeing membrane system product water quality of water.

Those of ordinary skill in the art will understand that: the figures are schematic representations of one embodiment, and the blocks or processes in the figures are not necessarily required to practice the present invention.

Those of ordinary skill in the art will understand that: the components in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be correspondingly changed in one or more devices different from the embodiments. The components of the above embodiments may be combined into one component, or may be further divided into a plurality of sub-components.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (4)

1. The utility model provides a not damaged prosthetic devices of lining hollow fiber membrane silk is not taken to inscription method which characterized in that includes: an inner support member (3), an adhesive member (4), a first hollow fiber membrane thread (1), and a second hollow fiber membrane thread (2);

the first hollow fiber membrane wire (1) and the second hollow fiber membrane wire (2) are two sections of hollow fiber membrane wires to be repaired, one end of the inner supporting component (3) is inserted into the inner cavity of the first hollow fiber membrane wire (1), the other end of the inner supporting component is inserted into the inner cavity of the second hollow fiber membrane wire (2), the two sections of hollow fiber membrane wires are preliminarily butted at the middle position of the inner supporting component (3) and remain a gap, and the end parts of the two sections of hollow fiber membrane wires are bonded into a whole after the bonding component (4) is embedded into the gap.

2. The device according to claim 1, characterized in that the inner support member (3) is a tubular structure, a positioning center line I is arranged at the middle position of the outer periphery of the inner support member (3), and anti-drop rings II are respectively arranged at the two end positions of the outer periphery.

3. The device according to claim 2, characterized in that the inner support member (3) is an integrated member; or, the fiber is a hollow fiber capillary structure with a smooth outer wall, and the length of the fiber is 30-40 mm.

4. Device according to claim 1, characterized in that the adhesive means (4) is a temporary adhesive which can be handled with water and which is flexible after curing.

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