Ultrafiltration membrane leakage detection and repair device

Abstract

This utility model discloses an ultrafiltration membrane leakage detection and repair device, comprising: a gas source, a frame, a pressure reducing valve, a concentrate end sealing assembly, a water collection ring, and a plugging and repair assembly. The frame includes a base and a clamping mechanism mounted on the base, the clamping mechanism being adapted to clamp and fix the ultrafiltration membrane assembly to be tested. The pressure reducing valve has an input end and an output end, the input end being connected to the gas source. The concentrate end sealing assembly is detachably mounted on the concentrate port of the ultrafiltration membrane assembly. The water collection ring is sleeved around the permeate port of the ultrafiltration membrane assembly, the water collection ring being adapted to form a water accumulation area at one end of the permeate port of the ultrafiltration membrane assembly. The output end of the pressure reducing valve is connected to the inlet end of the ultrafiltration membrane assembly and is adapted to introduce compressed gas into the ultrafiltration membrane assembly through the inlet end. This utility model is not only simple in structure and convenient to operate, but also can locate broken membrane fibers and achieve on-site repair without the need for water tank immersion.

Description

Technical Field

[0001] This utility model relates to an ultrafiltration membrane leakage detection and repair device. Background Technology

[0002] Ultrafiltration membrane modules are widely used in water treatment systems. They contain a large number of hollow fiber membrane filaments. During long-term operation, the membrane filaments may break due to pressure fluctuations, mechanical damage, or material aging, leading to a decline in the quality of the produced water and affecting the normal operation of the entire water treatment system.

[0003] Currently, when an ultrafiltration membrane module experiences a membrane fiber breakage failure, the entire module typically needs to be disassembled from the system and returned to the factory for repair. This repair method suffers from problems such as long testing cycles, high repair costs, the need for specialized equipment and technicians, and the requirement for a spare membrane module during the repair process, increasing operating costs.

[0004] After searching the existing technology, a Chinese patent with publication number CN209198418U was found to disclose an ultrafiltration membrane fiber breakage detection device. Although this device can detect and repair membrane fiber breakage, it requires immersing the entire ultrafiltration membrane in a water tank for testing. The device has a complex structure, occupies a large area, and requires a large amount of water, making it unsuitable for rapid on-site testing and repair operations. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an ultrafiltration membrane leakage detection and repair device. It is not only easy to operate, but also can locate the broken membrane fibers and achieve on-site repair without the need for water tank immersion.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: an ultrafiltration membrane leakage detection and repair device, comprising:

[0007] Gas source;

[0008] A frame, the frame including a base and a clamping mechanism disposed on the base, the clamping mechanism being adapted to clamp and fix the ultrafiltration membrane assembly to be tested;

[0009] A pressure reducing valve, wherein the pressure reducing valve is provided with an input end and an output end, the input end being connected to the gas source;

[0010] A concentrate end sealing assembly is detachably disposed on the concentrate outlet of the ultrafiltration membrane assembly;

[0011] A water collection ring is sleeved around the water outlet of the ultrafiltration membrane module, and the water collection ring is adapted to form a water accumulation area at one end of the water outlet of the ultrafiltration membrane module.

[0012] A plugging and repair assembly, comprising a plugging needle and a plugging adhesive;

[0013] The output end of the pressure reducing valve is connected to the inlet end of the ultrafiltration membrane module and is adapted to introduce compressed gas into the ultrafiltration membrane module through the inlet end. When the compressed gas is introduced into the sealed ultrafiltration membrane module, the sealing and repair component is adapted to seal and repair the corresponding membrane filament openings that generate bubbles in the water accumulation area.

[0014] Furthermore, the sealing and repair assembly includes a plugging needle and sealing adhesive.

[0015] Furthermore, to enable the introduction of compressed gas, the ultrafiltration membrane leakage detection and repair device also includes a water inlet sealing assembly. The water inlet sealing assembly is detachably installed at the water inlet end of the ultrafiltration membrane assembly. The water inlet sealing assembly is provided with an air inlet interface, which is connected to the output end of the pressure reducing valve.

[0016] Furthermore, a specific structure for a rack clamping mechanism is provided, the rack clamping mechanism comprising:

[0017] A support shaft is provided, which is rotatably mounted on the base;

[0018] A quick-release clamp is provided on the support shaft, and the quick-release clamp has an arc-shaped groove corresponding to the outer diameter of the ultrafiltration membrane module.

[0019] Furthermore, to provide bottom support for the ultrafiltration membrane module, the frame also includes:

[0020] A support arm, the proximal end of which is fixedly connected to the support shaft, and the distal end of which extends radially outward;

[0021] A tray holder, mounted on the distal end of the support arm, the tray holder being adapted to support the lower end of the ultrafiltration membrane assembly;

[0022] The tray base and the quick-release clamp together form a limiting mechanism suitable for supporting and fixing the ultrafiltration membrane module.

[0023] Furthermore, the sealing adhesive is a fast-curing sealant.

[0024] Furthermore, to facilitate pressure monitoring, the pressure reducing valve includes a pressure display component, which is disposed on the output end of the pressure reducing valve and is adapted to display the compressed gas pressure value.

[0025] Furthermore, the concentrate end sealing assembly is a manually operated quick-release plug.

[0026] Furthermore, the pressure setting range of the output end of the pressure reducing valve is 0.01-0.2 bar.

[0027] By adopting the above technical solution, this utility model has the following beneficial effects:

[0028] In this invention, during operation, the ultrafiltration membrane module to be tested is fixed in the clamping mechanism of the frame. The concentrate end sealing component is installed on the concentrate port of the ultrafiltration membrane module to form a seal. The water collection ring is sleeved around the product water port of the ultrafiltration membrane module and filled with clean water to form a water accumulation area. The gas source is connected to the water inlet of the ultrafiltration membrane module through a pressure reducing valve. Compressed gas is introduced into the sealed ultrafiltration membrane module from the water inlet after being regulated by the pressure reducing valve. When there are damaged membrane fibers inside the ultrafiltration membrane module, the gas will escape from the damaged area and generate continuous bubbles in the water accumulation area of ​​the water collection ring. The operator can determine the specific location of the damaged membrane fibers by observing the position of the bubbles. Then, the sealing and repair component is inserted into the membrane fiber opening corresponding to the bubble to seal and repair it. The entire testing and repair process can be completed directly on-site without disassembling and transporting the ultrafiltration membrane module to the manufacturer. The testing time is shortened from several days to several weeks to tens of minutes, while avoiding transportation costs and downtime losses.

[0029] In summary, this invention enables rapid on-site detection and repair of damaged membrane fibers in ultrafiltration membrane modules, simplifying the complex process that originally required factory repair into a simple operation that can be completed on-site, significantly reducing repair time and costs, and minimizing downtime of the water treatment system. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the ultrafiltration membrane leakage detection and repair device of this utility model;

[0031] Figure 2 This is a cross-sectional three-dimensional structural diagram of the ultrafiltration membrane leakage detection and repair device of this utility model. Figure 1 ;

[0032] Figure 3 This is a cross-sectional three-dimensional structural diagram of the ultrafiltration membrane leakage detection and repair device of this utility model. Figure 2 ;

[0033] Figure 4 This is a schematic diagram of the structure of the ultrafiltration membrane assembly of the ultrafiltration membrane leakage detection and repair device of this utility model. Detailed Implementation

[0034] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0035] like Figure 1-4As shown, an ultrafiltration membrane leakage detection and repair device includes:

[0036] Gas source;

[0037] The frame 5 includes a base and a clamping mechanism disposed on the base, the clamping mechanism being adapted to clamp and fix the ultrafiltration membrane assembly 100 to be tested;

[0038] The pressure reducing valve has an input end and an output end, with the input end connected to the gas source;

[0039] The concentrate end sealing assembly 4 is detachably installed on the concentrate outlet of the ultrafiltration membrane assembly 100.

[0040] Water collection ring 6 is sleeved around the water outlet 103 of the ultrafiltration membrane module 100. The water collection ring 6 is adapted to form a water accumulation area at one end of the water outlet 103 of the ultrafiltration membrane module 100.

[0041] The sealing and repair assembly includes a plugging needle and sealing adhesive.

[0042] The output end of the pressure reducing valve is connected to the inlet end 101 of the ultrafiltration membrane module 100 and is adapted to introduce compressed gas into the ultrafiltration membrane module 100 through the inlet end. When the compressed gas is introduced into the sealed ultrafiltration membrane module 100, the sealing and repair component is adapted to seal and repair the corresponding membrane fiber openings that generate bubbles in the water accumulation area.

[0043] In this embodiment, as Figure 1-2 As shown, during operation, the ultrafiltration membrane module 100 to be tested is placed in the clamping mechanism of the frame 5 for fixation. The concentrate end sealing component is installed on the concentrate port 102 of the ultrafiltration membrane module 100 to form a seal. The water collection ring 6 is sleeved around the product water port 103 of the ultrafiltration membrane module 100 and filled with clean water to form a water accumulation area. The gas source is connected to the water inlet 101 of the ultrafiltration membrane module 100 through the pressure reducing valve. After the compressed gas is regulated by the pressure reducing valve, it is introduced into the sealed ultrafiltration membrane module 100 from the water inlet 101. When there are damaged membrane fibers inside the ultrafiltration membrane module 100, the gas escapes from the damaged area and generates continuous bubbles in the water accumulation area of ​​the water collection ring 6. The operator determines the location of the damaged membrane fibers by observing the position of the bubbles, and then uses the sealing and repair component to insert into the membrane fiber opening corresponding to the bubble to seal and repair it.

[0044] In this embodiment, the air source is a pre-installed air distribution box in the factory; in other embodiments, it can also be a compressed air tank.

[0045] The plugging and repair kit includes a plugging needle and a plugging adhesive. When in use, the plugging needle can be dipped in the plugging adhesive and inserted into the membrane wire opening corresponding to the air bubble for plugging and repair.

[0046] The plugging needle and sealing adhesive are existing technologies. For the specific structure of the plugging needle, please refer to the ultrafiltration membrane repair needle with announcement number CN201036733Y. This embodiment will not elaborate further.

[0047] Specifically, such as Figure 1 As shown, the concentrate end sealing assembly 4 is a manual quick-release plug.

[0048] Specifically, such as Figure 1-3 As shown, the ultrafiltration membrane leakage detection and repair device also includes an inlet end sealing component. The inlet end sealing component is detachably installed on the inlet end 101 of the ultrafiltration membrane module 100. The inlet end sealing component is provided with an air inlet interface, which is connected to the output end of the pressure reducing valve.

[0049] In this embodiment, as Figure 1-3 As shown, the inlet sealing assembly adopts a manual quick-release plug structure, which achieves a sealing connection by inserting it into the inlet end of the ultrafiltration membrane module 100. The inlet sealing assembly has a sealing ring groove on its outer periphery, and an O-ring is installed inside the sealing ring groove. The O-ring contacts the inner wall of the inlet end 101 of the ultrafiltration membrane module 100 to form a seal.

[0050] Specifically, such as Figure 1-3 As shown, the clamping mechanism of frame 5 includes:

[0051] Support shaft 10 is rotatably mounted on the base;

[0052] Quick-release clamp 11 is mounted on the support shaft 10 and has an arc-shaped groove corresponding to the outer diameter of the ultrafiltration membrane module 100.

[0053] Specifically, such as Figure 1-2 As shown, rack 5 also includes:

[0054] The support arm 12 has its proximal end fixedly connected to the support shaft 10, and its distal end extends radially outward.

[0055] Tray seat 13 is mounted on the distal end of support arm 12 and is adapted to support the lower end of ultrafiltration membrane module 100.

[0056] The tray seat 13 and the quick-release clamp 11 together form a limiting mechanism suitable for supporting and fixing the ultrafiltration membrane module 100.

[0057] In this embodiment, as Figure 1-3As shown, the support shaft 10 is mounted on the two side columns of the base via bearing seats. The axis of the support shaft 10 is parallel to the length direction of the base, and the support shaft 10 can rotate around its own axis. The quick-release clamp 11 includes a fixed half-ring and a movable half-ring. The fixed half-ring is welded to the outer circumference of the support shaft 10. The movable half-ring is connected to one end of the fixed half-ring via a hinge. The other end of the movable half-ring is provided with a locking bolt. The locking bolt passes through a through hole on the movable half-ring and engages with a threaded hole on the fixed half-ring. The two half-rings can be closed and separated by rotating the locking bolt. The arc-shaped groove is formed by the inner surfaces of the fixed half-ring and the movable half-ring. The diameter of the arc-shaped groove matches the outer diameter of the ultrafiltration membrane module 100. A rubber pad is pasted on the inner surface of the arc-shaped groove. The rubber pad contacts the outer surface of the ultrafiltration membrane module 100, increasing the clamping friction and protecting the outer shell of the ultrafiltration membrane module 100.

[0058] The support arm 12 is a steel pipe structure. The proximal end of the support arm 12 is fixed to the support shaft 10 by welding. The support arm 12 and the support shaft 10 are arranged perpendicularly. The tray seat 13 is an L-shaped steel plate. The bottom surface of the tray seat 13 is welded to the top of the far end of the support arm 12. The lower end of the ultrafiltration membrane module 100 is placed inside the L-shaped steel plate for positioning.

[0059] When installing the ultrafiltration membrane module 100, first open the movable half-ring of the quick-release clamp 11, place the lower end of the ultrafiltration membrane module 100 into the tray seat 13, then place the middle part of the ultrafiltration membrane module 100 into the arc-shaped groove of the fixed half-ring, close the movable half-ring and tighten the locking bolt.

[0060] Specifically, the sealing adhesive is a fast-curing sealant.

[0061] Specifically, the pressure reducing valve includes a pressure display component, which is located at the output end of the pressure reducing valve and is adapted to display the compressed gas pressure value.

[0062] Specifically, the output pressure of the pressure reducing valve is set to 0.1 bar.

[0063] In some embodiments, the pressure setting range can be less than 0.2 bar.

[0064] In this embodiment, as Figure 1-3 As shown, the working principle of this utility model is as follows:

[0065] First, place the lower end of the ultrafiltration membrane module 100 on the tray seat 13 of the frame 5, and insert its middle part into the arc-shaped groove of the quick-release clamp 11. Rotate the locking handle of the quick-release clamp 11 to clamp and fix the ultrafiltration membrane module 100. Install the inlet sealing assembly on the inlet end 101 of the ultrafiltration membrane module 100. Install the concentrate sealing assembly 4 on the concentrate outlet 102 of the ultrafiltration membrane module 100. Fit the water collecting ring 6 around the product water outlet 103 of the ultrafiltration membrane module 100 to form an annular water collection trough.

[0066] Next, connect the gas source to the input end of the pressure reducing valve via a pipeline. The output end of the pressure reducing valve is connected to the air inlet of the water inlet sealing assembly via a flexible hose. Inject clean water into the water collection ring 6 until the water level covers one end of the product water port 103 of the ultrafiltration membrane module 100. Turn on the gas source and adjust the pressure reducing valve to control the output pressure at approximately 0.1 bar. The pressure display component shows the current pressure value. Compressed gas is introduced into the ultrafiltration membrane module 100 through the water inlet sealing assembly. With both ends of the ultrafiltration membrane module 100 sealed, the gas creates pressure in the internal chamber.

[0067] Then, when damaged membrane fibers are present inside the ultrafiltration membrane module 100, compressed gas passes through the inner cavity of the damaged membrane fibers and escapes from the membrane fiber opening at one end of the product water port 103, forming a continuously rising string of bubbles in the water accumulation area of ​​the water collection ring 6. The operator determines the specific location of the damaged membrane fiber by observing the position of the bubbles and marks it. Using a plugging needle dipped in an appropriate amount of sealing adhesive, the plugging needle is inserted into the membrane fiber opening corresponding to the bubbling, allowing the sealing adhesive to fully fill the damaged area. Keeping the plugging needle in place, after the sealing adhesive has initially cured, the plugging needle is slowly pulled out.

[0068] Finally, continue to monitor the air pressure for any remaining damaged membrane fibers, and repeat the above sealing steps until all damaged membrane fibers are repaired. Turn off the air supply, release the internal pressure of the ultrafiltration membrane module 100, remove the concentrate end sealing assembly 4, the inlet end sealing assembly and the water collection ring 6, loosen the quick-release clamp 11, and remove the repaired ultrafiltration membrane module 100 from the frame 5.

[0069] In practical use, the frame 5 can be installed above the factory drainage ditch, and the angle of the ultrafiltration membrane module 100 can be adjusted by rotating the support shaft 10, gradually turning it from a horizontal to a vertical position.

[0070] In this embodiment, as Figure 1-4As shown, the ultrafiltration membrane module 100 contains multiple parallel-arranged hollow fiber membrane filaments. One end of each membrane filament is sealed and fixed inside an end cap by resin casting. The outer shell of the ultrafiltration membrane module is a cylindrical structure. In this embodiment, the inlet 101 is located at the lower part of the cylindrical structure, the product water outlet 103 is located on the outer ring of the upper surface of the cylindrical structure, and the concentrate outlet 102 is located in the middle of the upper surface of the cylindrical structure. During operation, raw water enters the ultrafiltration membrane module from the inlet 101, located on the outside of the membrane filaments. Under pressure, water molecules pass through the micropores on the membrane filament wall and enter the inner cavity of the membrane filaments. The purified water is collected from the inner cavity of the membrane filaments and discharged through the product water outlet 103, while pollutants are trapped on the outside of the membrane filaments and discharged with the concentrate from the concentrate outlet 102. The specific structure of the ultrafiltration membrane module 100 is prior art and will not be described in detail in this embodiment.

[0071] When the membrane fibers break or rupture, the integrity of the membrane fiber wall is compromised. During the testing process, compressed gas enters the outer side of the ultrafiltration membrane module's membrane fibers from the inlet 101. Because the concentrate outlet 102 is blocked by the sealing component, positive pressure is created inside the membrane module. Normal membrane fibers, due to their intact walls, cannot allow gas to pass through; however, at the damaged membrane fibers, such as... Figure 4 As shown in Part A, gas can enter the membrane fiber cavity through the rupture point, flow upwards along the cavity, and finally escape from the membrane fiber opening at one end of the product outlet 103. Since each membrane fiber has an independent opening at one end of the product outlet 103, the specific ruptured membrane fiber can be accurately located by observing the position of the air bubble, such as... Figure 4 As shown in section B. The water accumulation area formed by the water collection ring makes the bubble phenomenon more obvious, making it easier to observe and locate.

[0072] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for detecting and repairing leakage in an ultrafiltration membrane, characterized in that, include: Gas source; The frame (5) includes a base and a clamping mechanism disposed on the base, the clamping mechanism being adapted to clamp and fix the ultrafiltration membrane assembly (100) to be tested. A pressure reducing valve, wherein the pressure reducing valve is provided with an input end and an output end, the input end being connected to the gas source; A concentrate end sealing assembly (4) is detachably disposed on the concentrate outlet (102) of the ultrafiltration membrane assembly (100); Water collection ring (6), the water collection ring (6) is sleeved around the water outlet (103) of the ultrafiltration membrane module (100), the water collection ring (6) is adapted to form a water accumulation area at one end of the water outlet (103) of the ultrafiltration membrane module (100); Sealing and repair components; The output end of the pressure reducing valve is connected to the inlet end (101) of the ultrafiltration membrane module (100) and is adapted to introduce compressed gas into the ultrafiltration membrane module (100) through the inlet end. The sealing and repair component is adapted to seal and repair the corresponding membrane filament openings that generate bubbles in the water accumulation area.

2. The ultrafiltration membrane leakage detection and repair device according to claim 1, characterized in that: The sealing and repair assembly includes a plugging needle and sealing adhesive.

3. The ultrafiltration membrane leakage detection and repair device according to claim 1, characterized in that: It also includes an inlet sealing assembly, which is detachably mounted on the inlet end (101) of the ultrafiltration membrane assembly (100). The inlet sealing assembly is provided with an air inlet interface, which is connected to the output end of the pressure reducing valve.

4. The ultrafiltration membrane leakage detection and repair device according to claim 1, characterized in that: The clamping mechanism of the frame (5) includes: A support shaft (10) is rotatably mounted on the base; Quick-install clamp (11) is provided on the support shaft (10) and has an arc-shaped groove corresponding to the outer diameter of the ultrafiltration membrane assembly (100).

5. The ultrafiltration membrane leakage detection and repair device according to claim 4, characterized in that: The rack (5) also includes: Support arm (12), the proximal end of which is fixedly connected to the support shaft (10), and the distal end of which extends radially outward; A tray seat (13) is mounted on the distal end of the support arm (12) and is adapted to carry the lower end of the ultrafiltration membrane assembly (100); The tray seat (13) and the quick-release clamp (11) together form a limiting mechanism suitable for supporting and fixing the ultrafiltration membrane assembly (100).

6. The ultrafiltration membrane leakage detection and repair device according to claim 2, characterized in that: The sealing adhesive is a fast-curing sealant.

7. The ultrafiltration membrane leakage detection and repair device according to claim 1, characterized in that: The pressure reducing valve includes a pressure display component, which is disposed on the output end of the pressure reducing valve and is adapted to display the compressed gas pressure value.

8. The ultrafiltration membrane leakage detection and repair device according to claim 1, characterized in that: The concentrate end sealing assembly (4) is a manual quick-release plug.

9. The ultrafiltration membrane leakage detection and repair device according to claim 1, characterized in that: The pressure setting range of the output end of the pressure reducing valve is 0.01-0.2 bar.

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