Method of repair and repair solution for ultrafiltration membrane modules
By adding a repair solution and applying pressure to the ultrafiltration membrane module, solid particles clog the broken channels, solving the problem of increased turbidity in the permeate after membrane fiber breakage. This achieves simple and efficient membrane fiber repair, ensuring water quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-11
- Publication Date
- 2026-03-24
AI Technical Summary
Existing technologies often result in complex and incomplete repair procedures after the membrane fibers of an ultrafiltration membrane module break, leading to increased turbidity in the produced water and failing to effectively guarantee water quality.
A repair solution, consisting of water and solid particles with a solubility of less than 0.1 g/100 g and a diameter smaller than the inner diameter of the ultrafiltration membrane fibers, is used to repair the ultrafiltration membrane module by applying pressure to allow the particles to enter the fractured channels and block the fracture opening.
It simplifies the repair process, improves work efficiency, effectively improves the membrane fiber repair ratio, reduces permeate turbidity, and meets water quality requirements.
Smart Images
Figure CN116651215B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of water treatment technology, and in particular to a method and solution for repairing an ultrafiltration membrane module. Background Technology
[0002] Currently, drinking water can be produced through ultrafiltration membrane systems in the drinking water industry. Ultrafiltration membrane systems have the characteristics of low energy consumption, high water recovery rate, easy cleaning, low operating cost, and retention of some divalent mineral ions in the produced water, making them increasingly popular in the market.
[0003] When the membrane fibers inside an ultrafiltration membrane break, large particles can penetrate directly into the permeate, increasing the turbidity of the permeate. To maintain permeate quality, current technology involves manually opening the permeate end cap at the top of the ultrafiltration membrane and plugging the outlet of the broken membrane fiber with a plugging needle. However, this repair technique is complex, labor-intensive, and cannot guarantee that every broken fiber can be repaired. Summary of the Invention
[0004] In view of the shortcomings of the prior art described above, one of the objectives of this disclosure is to provide a repair method for ultrafiltration membrane modules. The repair method is simple to operate, has high repair efficiency, and can effectively improve the repair ratio of ultrafiltration membrane fibers.
[0005] Another objective of this disclosure is to provide a repair solution for repairing ultrafiltration membrane modules.
[0006] To achieve the above and related objectives, this disclosure provides a method for repairing an ultrafiltration membrane module, characterized in that the ultrafiltration membrane module comprises a plurality of ultrafiltration membrane fibers, and the repair method comprises: providing a repair solution, the repair solution comprising water and solid particles, wherein the solubility of the solid particles in the water is less than or equal to 0.1 g / 100 g, and the diameter of the solid particles is less than or equal to the inner diameter of the ultrafiltration membrane fibers; when an ultrafiltration membrane fiber of the ultrafiltration membrane module breaks, adding the repair solution to the ultrafiltration membrane module and applying pressure to the ultrafiltration membrane module, so that the repair solution enters the broken channel of the ultrafiltration membrane fiber, thereby repairing the ultrafiltration membrane module.
[0007] In some embodiments, the ultrafiltration membrane assembly further includes: a housing having an inlet and an outlet, the ultrafiltration membrane fibers being housed within the housing; and a cover covering the housing, wherein the remediation solution is added to the ultrafiltration membrane assembly through the inlet on the housing.
[0008] In some embodiments, the ultrafiltration membrane fiber is a hollow fiber membrane with an inner diameter in the range of 0.7 mm to 1 mm.
[0009] In some embodiments, the solid particles comprise spherical particles with a diameter of 0.7-1 mm.
[0010] In some embodiments, the solid particles have a Mohs hardness greater than or equal to 1.
[0011] In some embodiments, the solid particles are selected from any one or more combinations of diatomaceous earth, resin, montmorillonite, activated carbon, and graphene.
[0012] In some embodiments, each 100g of water contains at least 10g of solid particles.
[0013] In some embodiments, the repair method includes adding the repair solution to the ultrafiltration membrane module and applying pressure to the ultrafiltration membrane module for a period of 3 seconds to 3 minutes.
[0014] In some embodiments, the applied pressure is 0.05 MPa to 0.1 MPa.
[0015] This disclosure also provides a repair solution for an ultrafiltration membrane module, the repair solution comprising water and solid particles, wherein the solubility of the solid particles in the water is less than or equal to 0.1 g / 100 g, and the diameter of the solid particles is less than or equal to the diameter of the ultrafiltration membrane fibers.
[0016] As described above, this disclosure provides a method and solution for repairing an ultrafiltration membrane module. The method involves adding a repair solution to the ultrafiltration membrane module when the ultrafiltration membrane fibers break, and applying pressure to the module to force the repair solution into the broken channels of the ultrafiltration membrane fibers, thereby repairing the module. The repair solution comprises water and solid particles, wherein the solubility of the solid particles in the water is less than or equal to 0.1 g / 100 g, and the diameter of the solid particles is less than or equal to the inner diameter of the ultrafiltration membrane fibers. This repair method is simple to operate, easy to implement, and highly efficient, effectively improving the repair ratio of ultrafiltration membrane fibers. Attached Figure Description
[0017] Figure 1 The diagram shown is a structural schematic of the ultrafiltration membrane system provided in this disclosure.
[0018] Figure 2 Displayed as Figure 1 A schematic diagram of the structure of a single ultrafiltration membrane module.
[0019] Figure 3 The image shown is a scanning electron microscope (SEM) image of the ultrafiltration membrane in the ultrafiltration membrane module.
[0020] Figure 4This is a schematic diagram of ultrafiltration membrane filtration using an ultrafiltration membrane module.
[0021] Figure 5 The diagram shows a flowchart of a repair method for an ultrafiltration membrane module.
[0022] Figure 6 The diagram shows a repair method for an ultrafiltration membrane module.
[0023] Figure 7 This diagram illustrates the filtration process after the ultrafiltration membrane module has been repaired.
[0024] Figure 8 The diagram shows a structural schematic of a treatment system that includes the ultrafiltration membrane system for graded filtration. Detailed Implementation
[0025] The following specific examples illustrate embodiments of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. This disclosure can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure.
[0026] In this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used only for descriptive and distinguishing purposes and should not be construed as indicating or implying relative importance.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. While this disclosure may be practiced with any methods and materials similar to or equivalent to those described herein, preferred methods, devices, and materials are described below.
[0028] like Figures 1 to 6As shown, this disclosure provides a specific embodiment of a method for repairing ultrafiltration membrane modules and a repair solution. The ultrafiltration membrane filtration system includes a large number of ultrafiltration membrane modules 110, and each ultrafiltration membrane module is composed of tens of thousands of membrane fibers 112. Water molecules in the water enter the interior of the membrane fibers 112 through the membrane fibers, while larger particles 200 are trapped outside the membrane fibers 112, thereby achieving water purification. The turbidity of the ultrafiltration water decreases, meeting the requirements of the final water use indicators. The repair method for the ultrafiltration membrane module involves adding a repair solution to the ultrafiltration membrane module 110 when the ultrafiltration membrane fiber 112 breaks, and applying pressure to the ultrafiltration membrane module 110 to allow the repair solution to enter the broken channel of the ultrafiltration membrane fiber, thereby repairing the ultrafiltration membrane module 110. The repair solution, as described in this disclosure, comprises water and solid particles 300. The solubility of the solid particles 300 in water is less than or equal to 0.1 g / 100 g, and the diameter of the solid particles 300 is less than or equal to the inner diameter of the ultrafiltration membrane fiber 112. This repair method is simple to operate, easy to implement, and highly efficient, effectively improving the repair ratio of the ultrafiltration membrane fiber.
[0029] like Figures 1 to 3 As shown, embodiments of this disclosure detail an ultrafiltration membrane system. For example... Figure 1 As shown, the ultrafiltration membrane system includes a support 101, a connecting pipe 102, and multiple ultrafiltration membrane modules 110. These ultrafiltration modules 100 are fixedly installed on the ground or wall by the support 101. The connecting pipe 102 includes an inlet pipe 1021, an outlet pipe 1022, and branch pipes 1023 respectively connected to each ultrafiltration membrane module 110. The water to be treated enters the ultrafiltration membrane module 103 through the inlet pipe 1021 at one end, and then enters through the branch pipe 1023 for filtration. After that, the filtered water is led out from the outlet pipe 1022.
[0030] Please continue to refer to this. Figure 1 and Figure 2The ultrafiltration membrane system comprises dozens or even hundreds, such as 10 to 1000 ultrafiltration membrane modules 110. Each ultrafiltration membrane module 110 includes a housing 111, ultrafiltration membrane fibers 112, and a cover 113. The housing 111 is, for example, elongated cylindrical with openings at both ends, so that the ultrafiltration membrane fibers 112 are housed within the housing 111. The cover 113 covers the openings at both ends of the housing 111 and can be further sealed by sealing rings (not shown in the figure) to prevent leakage of filtered water. The housing 111 has openings 1111 and 1112, so that the raw water to be treated enters the housing 111 through the opening 1111, and after being filtered by the ultrafiltration membrane fibers 112, flows out of the housing 111 through the opening 1112, and then enters the subsequent second filtration unit 120 for filtration, reducing fouling and scaling of the second filtration unit 120. The length of the housing 111, and further, the length of the ultrafiltration membrane fiber 112, is not less than 10cm, for example, 50cm, to ensure sufficient filtration effect.
[0031] like Figure 2 and Figure 3 As shown, Figure 3 A and Figure 3 B shows scanning electron microscope images of the ultrafiltration membrane fibers at different magnifications. The ultrafiltration membrane fiber 112 is a porous hollow fiber membrane, for example, a membrane with a surface pore size in the range of 0.01 μm to 0.1 μm, such as 0.1 mm. The specific materials of the hollow fiber membrane can include inorganic materials such as ceramics, polyethylene, polypropylene, polyacrylonitrile, ethylene-tetrafluoroethylene copolymer, polychlorotrifluoroethylene, polytetrafluoroethylene, polyfluorinated polyethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, trifluorochloroethylene-ethylene copolymer, polyvinylidene fluoride, polysulfone, cellulose acetate, polyvinyl alcohol, polyethersulfone, polyvinyl chloride, and further, for example, polyvinylidene fluoride (PVDF), which has high chemical durability, high physical strength and excellent antifouling properties.
[0032] When filtering water, such as Figure 4 and Figure 6 , Figure 7As shown, water molecules in the water body enter the interior of the ultrafiltration membrane filament 112 through the membrane filament, while larger particles 200 are trapped outside the membrane filament, thereby achieving water purification. When the membrane filament inside the ultrafiltration membrane breaks, large particles 200 will directly penetrate the membrane filament and enter the product water side, resulting in increased turbidity of the product water. In this embodiment, a repair solution is added to the ultrafiltration membrane module 110 and the ultrafiltration membrane module housing 111 is added. Pressure is applied to the ultrafiltration membrane module 110, and the repair solution flows with the water flow direction, entering the broken channel of the ultrafiltration membrane filament 112 and blocking the broken channel. The diameter of the broken end of 12 is adjusted to repair the ultrafiltration membrane module 110, thereby preventing turbid water in the housing 111 from entering the broken ultrafiltration membrane fiber 112 and flowing out from the product water outlet, thus reducing the quality of the product water. In this embodiment, the ultrafiltration membrane module 110 can be repaired by direct addition, avoiding the need to manually open the membrane housing end cap and manually block the product water outlet of the broken fiber. This embodiment simplifies the repair work of broken ultrafiltration membrane fibers, is simple to operate, has high repair efficiency, and can effectively improve the repair ratio of ultrafiltration membrane fibers. The repair method in this embodiment meets the ultrafiltration product water quality requirements, with turbidity less than 1.
[0033] refer to Figure 5 The repair method in this embodiment includes:
[0034] Step S1: Provide a repair solution comprising water and solid particles 300, wherein the solubility of the solid particles 300 in the water is less than or equal to 0.1 g / 100 g, and the diameter of the solid particles 300 is less than or equal to the inner diameter of the ultrafiltration membrane fiber;
[0035] Step S2: When the ultrafiltration membrane fiber of the ultrafiltration membrane module breaks, the repair solution is added to the ultrafiltration membrane module, and pressure is applied to the ultrafiltration membrane module so that the repair solution enters the broken channel of the ultrafiltration membrane fiber to repair the ultrafiltration membrane module.
[0036] like Figures 4 to 7 As shown, in step S1 above, the repair solution in this embodiment includes water and solid particles 300. The water can be deionized water, and the solubility of the solid particles 300 in the water is less than or equal to 0.1 g / 100 g, and further less than or equal to 0.05 g / 100 g. This can refer to the solubility at room temperature, such as 20 to 30 degrees Celsius, applicable to drinking water use scenarios. Within the above-mentioned solubility range, the solid particles 300 are difficult to dissolve or insoluble in water. The solid particles 300 are suspended in the water in the form of fine particles, and thus these solid particles 300 flow with the water to the broken ultrafiltration membrane fiber 112, blocking the internal channels of the broken membrane fiber and realizing the repair operation.
[0037] In some embodiments, each 100g of water contains at least 10g of solid particles 300, such as 10g, 20g, 30g, or 50g. Within the above range, the effective number of particles in the repair solution can be guaranteed, as well as the viscosity and flowability balance of the solution can be guaranteed. The solid particles 300 enter the membrane fiber with the flow of water and remain at the break point of the broken membrane fiber to fill it.
[0038] It is worth noting that, from the perspective of effective repair and effective filtration, in this embodiment of the present disclosure, the diameter of the solid particles 300 in the repair solution is less than or equal to the inner diameter of the ultrafiltration membrane fiber. As mentioned above, the inner diameter of the ultrafiltration membrane fiber is in the range of 0.7 mm to 1 mm. Therefore, the particle size of the solid particles 300 is also less than or equal to 1 mm. When the diameter of the solid particles 300 is greater than the diameter of the ultrafiltration membrane fiber 112, these solid particles 300 solution will be blocked outside the ultrafiltration membrane fiber 112. When the diameter of the solid particles 300 is less than or equal to the ultrafiltration membrane fiber, the solid particles 300 can smoothly reach the interior of the broken membrane fiber, thereby blocking the breakage by dispersing or aggregating particles, repairing the breakage, and repairing the port. At the same time, when the diameter of the solid particles 300 is less than or equal to the ultrafiltration membrane fiber, the solid particles 300 will not occupy too much volume of the ultrafiltration membrane fiber 112. The repaired ultrafiltration membrane fiber 112 still has relatively rich pores, which will not affect the ultrafiltration performance and may even make the ultrafiltration product water quality better.
[0039] In other specific embodiments, the solid particles 300 can be spherical particles with a particle size of 0.7-1 mm. The spherical particles allow for more uniform repair of the fractured ends of the ultrafiltration membrane fibers 112. These spherical particles also exhibit some expansion in water, improving the repair effect. Furthermore, the solid particles 300 have a Mohs hardness greater than or equal to 1, thus possessing a certain physical strength to effectively support the fractured membrane fibers, allowing the ultrafiltration membrane fibers 112 to maintain their original shape. Additionally, the solid particles 300 can exhibit acid resistance, alkali resistance, and oxidation resistance, meaning they possess good stability in acidic, alkaline, and oxygen-containing environments.
[0040] In other specific embodiments, the solid particles 300 can be specifically selected from any one or more combinations of diatomaceous earth, resin, montmorillonite, activated carbon, and graphene. Further examples include diatomaceous earth or resin. Diatomaceous earth is mainly composed of SiO2, containing small amounts of Al2O3, Fe2O3, CaO, MgO, and other organic matter. Its surface also has a porous structure, allowing it to easily penetrate the interior of the broken membrane fibers and block the channels within the fibers. The porous structure of its surface can also achieve a certain degree of water filtration.
[0041] Continue to refer to, for example Figure 6 and Figure 7 In step S2 above, when the ultrafiltration membrane fiber of the ultrafiltration membrane module breaks, the repair solution enters the housing through the inlet 1111 on the surface of the ultrafiltration membrane module 110. Under pressure, the solution enters the interior of the ultrafiltration membrane fiber 112 and fills the breakage site. After the ultrafiltration membrane module 110 is repaired, the broken ultrafiltration membrane fiber 112 is filled and no longer filters permeate water. Meanwhile, the intact ultrafiltration membrane fiber 112 can perform normal permeate water filtration. The repaired ultrafiltration membrane module 110 reduces the water quality degradation caused by the broken membrane fiber. Please continue to refer to... Figure 1 , Figure 2 , Figure 6 and Figure 7 In some specific embodiments, the repair solution can be pressurized 3 seconds after being added to the ultrafiltration membrane module 110, for example, by internal pressurizing it at the 3rd second or the 5th second. This can effectively ensure that the repair solution wets the entire ultrafiltration membrane fiber 112 of the ultrafiltration membrane module 110. Furthermore, pressure can be applied within 3 minutes of being added to the ultrafiltration membrane module 110 to avoid prolonged residence time, which could lead to precipitation of the repair solution and a decrease in the repair effect.
[0042] Please continue to refer to Figure 1 , Figure 2 , Figure 6 and Figure 7 In some specific embodiments, compressed air can be introduced into the ultrafiltration membrane module 110 to apply pressure to it. It should be understood that the ultrafiltration membrane system is equipped with an air compressor (not shown in the figure), a valve (not shown in the figure), and pipelines (not shown in the figure). These pipelines connect the air compressor and the ultrafiltration membrane module 110, and are controlled by the valves to increase and release pressure inside the ultrafiltration membrane module 110. The applied pressure can be adjusted, with an ideal range of 0.05 MPa to 0.1 MPa, for example, 0.05 MPa, 0.08 MPa, or 0.1 MPa. Within this pressure range, the repair solution can be fully squeezed into the interior of the ultrafiltration membrane fibers and successfully reach the fracture site, simplifying the repair work of broken ultrafiltration membrane fibers, quickly repairing a large number of broken membrane fibers, and increasing the repair ratio.
[0043] As described above, this disclosure provides a method and solution for repairing an ultrafiltration membrane module. The method involves adding a repair solution to the ultrafiltration membrane module when the ultrafiltration membrane fibers break, and applying pressure to the module to force the repair solution into the broken channels of the ultrafiltration membrane fibers, thereby repairing the module. The repair solution comprises water and solid particles 300, wherein the solubility of the solid particles 300 in water is less than or equal to 0.1 g / 100 g, and the diameter of the solid particles 300 is less than or equal to the inner diameter of the ultrafiltration membrane fibers. This repair method is simple to operate, easy to implement, and highly efficient, effectively improving the repair ratio of ultrafiltration membrane fibers. The repaired ultrafiltration membrane system has the expected design flux, for example, 50–200 L / m²·h, and a filtration accuracy of 0.01 μm–0.1 μm. For example, in one specific embodiment, it can be designed with 40 ultrafiltration membrane modules connected in parallel, with a design flux of 60 L / m²·h. 2 •h, with a filtration accuracy of 0.01μm.
[0044] like Figure 8 As shown in the embodiments of this disclosure, a staged filtration system incorporating the aforementioned repaired ultrafiltration membrane system is further provided. This staged filtration system includes a first filtration unit 110, a second filtration unit 120, and a concentrate recovery unit 130. The staged filtration water treatment system 100 utilizes a multi-stage filtration process, achieving a minimum removal rate for monovalent ions while maintaining a high removal rate for divalent ions. This allows for the retention of 40-60% of monovalent salts and approximately 3% of divalent minerals in the final product water, significantly improving the quality of the product water, while achieving a water utilization rate as high as 90%. The graded filtration water treatment system 100 and water treatment process disclosed herein can be used for upgrading existing waterworks, treating wastewater with total dissolved solids (TDS) below 300 ppm, and treating waterworks that use rivers and lakes as water sources. In particular, for existing waterworks, the water produced after passing through the first filtration unit 110 and the second filtration unit 120 is directly drinkable water, removing harmful organic substances while retaining beneficial minerals.
[0045] like Figure 8As shown, the first filtration unit 110 includes the ultrafiltration membrane system. The ultrafiltration membrane components in these ultrafiltration membrane systems can be unbroken or broken and repaired. Under the action of pressure difference, the ultrafiltration membrane components can separate molecules larger than 10 nm based on adsorption, sieving and blocking effects. Furthermore, they have a good separation effect on molecules with a particle size of 10 to 100 nm, such as colloids, particles, and substances with larger molecular weights. In particular, they can directly remove some virus molecules, bacteria and suspended solids.
[0046] The second filtration unit 120 includes a nanofiltration membrane module. Under pressure, and further under a pressure difference of 5-25 bar, the nanofiltration membrane module, based on particle size sieving and dissolution-diffusion mechanisms, as well as ion selectivity, has a good separation effect on molecules larger than 1 nm and smaller than 10 nm. Specifically, it has a high rejection rate for low molecular weight organic matter and polyvalent ions (e.g., divalent ions, magnesium ions, calcium ions), while having a low rejection rate for monovalent ions (e.g., chloride ions, fluoride ions, nitrate ions). For example, the nanofiltration membrane module can effectively remove trace organic compounds such as pesticides, herbicides, antibiotics, trihalomethane (THM) precursors, bacteria, and viruses, while retaining certain minerals.
[0047] like Figure 8 As shown, the second filtration unit 120 is connected to the first filtration unit 110, for example, through a product water tank located between them. However, this is not a limitation; the inlet of the nanofiltration module can also be directly connected to the outlet of the ultrafiltration module via a pipeline, thus forming a connecting passage. Furthermore, the second filtration unit 120 may also include other assembly units (not shown in the figure). These assembly units differ from those in the first filtration unit. The second filtration unit 120 may also include a resin trap, a demineralized water pump, and a demineralized water tank, thereby assembling and fixing the ultrafiltration membrane module to perform its separation function under pressure differential. These can be designed according to actual needs, referencing existing structures and products, and are not particularly limited. Furthermore, these nanofiltration membrane modules may include one or more connected in parallel, further including 50 to 1000 modules, for example, 500 modules, thereby ensuring that the design flux of the nanofiltration membrane module is 10 to 100 L / m³. 2 •h, further specifying a filtration precision of 1–10 nm. It should be understood that any structure that connects the second filter unit 120 to the first filter unit 110 should be covered within the scope of this disclosure.
[0048] like Figure 8As shown, the graded filtration water treatment system 100 further includes a concentrate recovery unit 130. The concentrate recovery unit 130 can be, for example, a concentrate storage tank, connected to a second filtration unit 120 via a control valve and pipeline (not shown in the figure). Specifically, it is connected to the concentrate flow channel 127 of the nanomembrane module to collect concentrate. The graded filtration water treatment system 100 provided in this disclosure has been tested and shows a water utilization rate of over 90%, and further greater than or equal to 95%.
[0049] like Figure 8 As shown in some other embodiments of this disclosure, the graded filtration water treatment system may further include a chemical treatment unit (shown in the figure) and a sedimentation unit (shown in the figure). The chemical treatment unit is in direct contact with the raw water to be treated, and the sedimentation unit is connected to the chemical treatment unit and the first filtration unit, located between the two, thereby flocculating and settling the water treated by the chemical treatment unit 140.
[0050] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the methods disclosed herein, and these improvements and additions should also be considered within the scope of protection of this disclosure. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this disclosure, based on the disclosed technical content, are equivalent embodiments of this disclosure. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this disclosure still fall within the scope of the technical solution of this disclosure.
Claims
1. A method for repairing an ultrafiltration membrane module, characterized in that, The ultrafiltration membrane module includes multiple ultrafiltration membrane fibers, and the repair method includes: A remediation solution is provided, the remediation solution comprising water and solid particles, wherein the solubility of the solid particles in the water is less than or equal to 0.1 g / 100 g, and the diameter of the solid particles is less than or equal to the inner diameter of the ultrafiltration membrane fiber; When the ultrafiltration membrane fibers of an ultrafiltration membrane module break, the repair solution is added to the ultrafiltration membrane module, and pressure is applied to the ultrafiltration membrane module so that the repair solution enters the broken channel of the ultrafiltration membrane fibers, thereby repairing the ultrafiltration membrane module.
2. The method for repairing an ultrafiltration membrane module according to claim 1, characterized in that, The ultrafiltration membrane assembly also includes: A housing with an inlet and an outlet, wherein the ultrafiltration membrane fibers are housed within the housing; And a cover, which is fitted onto the housing, wherein the repair solution is added to the ultrafiltration membrane assembly through an inlet on the housing.
3. The method for repairing an ultrafiltration membrane module according to claim 1, characterized in that, The ultrafiltration membrane fibers are hollow fiber membranes with an inner diameter in the range of 0.7 mm to 1 mm.
4. The method for repairing an ultrafiltration membrane module according to claim 3, characterized in that, The solid particles include spherical particles with a particle size of 0.7-1 mm.
5. The method for repairing the ultrafiltration membrane according to claim 4, characterized in that, The solid particles have a Mohs hardness greater than or equal to 1.
6. The method for repairing an ultrafiltration membrane module according to any one of claims 1 to 5, characterized in that, The solid particles are selected from any one or more combinations of diatomaceous earth, resin, montmorillonite, activated carbon, and graphene.
7. The method for repairing an ultrafiltration membrane module according to claim 1, characterized in that, Each 100g of water contains at least 10g of solid particles.
8. The method for repairing an ultrafiltration membrane module according to claim 1, characterized in that, The repair method includes adding the repair solution to the ultrafiltration membrane module and applying pressure to the ultrafiltration membrane module for a period of 3 seconds to 3 minutes.
9. The method for repairing an ultrafiltration membrane module according to claim 1 or 8, characterized in that, The applied pressure is 0.05MPa~0.1MPa.