Ultrafiltration membrane water treatment device

Abstract

The utility model discloses an ultrafiltration membrane water treatment device which comprises a membrane shell, a water inlet end cover, a water production end cover and an ultrafiltration membrane assembly, a water production end cover and a water inlet end cover are respectively arranged at the top and the bottom of the membrane shell; the water inlet end cover is provided with a water inlet; the water producing end cover is provided with a water producing port; at least the water inlet end of the ultrafiltration membrane assembly is movably arranged in the membrane shell; the water inlet end of the ultrafiltration membrane component is positioned at the bottom of the membrane shell, and the water producing end of the ultrafiltration membrane component is positioned at the top of the membrane shell; the diameter of the water inlet end of the ultrafiltration membrane assembly is smaller than the inner diameter of the membrane shell, so that the water inlet end of the ultrafiltration membrane assembly can generate floating motion under the change of water flow and pressure. The filtering efficiency can be improved, and the service life can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of water treatment devices, and in particular to an ultrafiltration membrane water treatment device. Background Technology

[0002] Ultrafiltration membrane water treatment technology utilizes pressure difference as the driving force to remove contaminants from water through the selective separation of the membrane. In existing ultrafiltration membrane water treatment devices, the inlet end of the membrane module is usually fixed to the inlet end cap. This fixed connection has several technical problems, such as: the inlet end of the fixedly connected membrane module is prone to clogging, affecting filtration efficiency; during backwashing, it is difficult to effectively remove contaminants from the membrane surface; it lacks self-adaptability and cannot automatically adjust its operating status according to changes in water quality and pressure. In addition, the fixed connection structure has no buffering effect under fluid impact, and is prone to membrane fiber damage due to stress concentration, reducing its service life. When the water quality is poor, the fixed design cannot automatically avoid large particulate contaminants, leading to frequent clogging, reduced water production, and increased chemical reagent consumption and operating costs. Fixed ultrafiltration membrane modules lack flexibility when water quality changes, cannot automatically adjust their operating status, resulting in low cleaning efficiency or resource waste, and making it difficult to achieve intelligent operation.

[0003] Therefore, there is an urgent need to develop an ultrafiltration membrane water treatment device to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an ultrafiltration membrane water treatment device that can improve filtration efficiency and service life.

[0005] To solve the above-mentioned technical problems, this utility model provides an ultrafiltration membrane water treatment device, including a membrane shell, an inlet end cap, a product water end cap, and an ultrafiltration membrane assembly; the product water end cap and the inlet end cap are respectively provided at the top and bottom of the membrane shell; the inlet end cap is provided with an inlet; the product water end cap is provided with a product water outlet; the ultrafiltration membrane assembly is movably disposed within the membrane shell at least at its inlet end; the inlet end of the ultrafiltration membrane assembly is located at the bottom of the membrane shell, and the product water end of the ultrafiltration membrane assembly is located at the top of the membrane shell; the diameter of the inlet end of the ultrafiltration membrane assembly is smaller than the inner diameter of the membrane shell, so that the inlet end of the ultrafiltration membrane assembly can float under changes in water flow and pressure.

[0006] Furthermore, during the filtration stage, raw water enters the membrane housing from the inlet and then enters the ultrafiltration membrane module through the inlet end of the ultrafiltration membrane module for filtration to the product water end; during the backwashing stage, cleaning gas and backwash water enter the membrane housing from the product water inlet, enter the ultrafiltration membrane module through the product water end of the ultrafiltration membrane module, and discharge pollutants from the inlet end of the ultrafiltration membrane module.

[0007] Furthermore, the inlet diameter of the ultrafiltration membrane module is 209–216 cm.

[0008] Furthermore, the inner diameter of the membrane shell is 210–220 cm.

[0009] Furthermore, the diameter of the inlet end of the ultrafiltration membrane module is smaller than the pore size of the inlet.

[0010] Furthermore, the diameter of the inlet end of the ultrafiltration membrane module is smaller than the inner diameter of the membrane shell, and this diameter difference forms a gap space that allows the inlet end of the ultrafiltration membrane module to float.

[0011] Furthermore, the diameter of the inlet end of the ultrafiltration membrane module is smaller than the diameter of the middle section of the ultrafiltration membrane module.

[0012] Furthermore, the ultrafiltration membrane assembly includes multiple membrane fibers.

[0013] Furthermore, the ultrafiltration membrane assembly is arranged longitudinally along the membrane housing.

[0014] Furthermore, the membrane shell is provided with a concentrate outlet.

[0015] Through the above technical solution, this utility model has the following beneficial effects:

[0016] By designing the inlet end of the ultrafiltration membrane module to be smaller than the inner diameter of the membrane housing, the inlet end can float freely under changes in water flow and pressure, creating a dynamic working state. This effectively avoids clogging at the inlet end and improves filtration efficiency. Simultaneously, this floating design enhances contaminant removal during backwashing, extending the membrane module's lifespan and reducing maintenance costs and frequency.

[0017] In addition, by setting a reasonable difference between the inlet diameter and the inner diameter, an appropriate floating gap space is formed, allowing the ultrafiltration membrane module to float freely within a range of less than 1 cm. This precise floating space design not only ensures that the membrane module has sufficient mobility to cope with changes in water quality, but also prevents damage that may be caused by excessive movement of the membrane module, significantly improving the system's adaptability and operational stability, and realizing a more intelligent water treatment process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an ultrafiltration membrane water treatment device in one embodiment of the present invention.

[0019] In the diagram, 1 is the membrane housing; 11 is the inlet cap; 110 is the inlet; 12 is the product cap; 120 is the product outlet; 2 is the ultrafiltration membrane module; 21 is the inlet; and 22 is the product end. Detailed Implementation

[0020] The following is a more detailed description of an ultrafiltration membrane water treatment device according to the present invention, with reference to the accompanying drawings, which illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.

[0021] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0022] like Figure 1 As shown in the figure, this utility model embodiment proposes a convenient and practical ultrafiltration membrane water treatment device, including a membrane housing 1, an inlet end cap 11, a product water end cap 12, and an ultrafiltration membrane assembly 2; the top and bottom of the membrane housing 1 are respectively provided with the product water end cap 12 and the inlet end cap 11; the inlet end cap 11 is provided with an inlet 110; the product water end cap 12 is provided with a product water outlet 120; the ultrafiltration membrane assembly 2 is movably disposed within the membrane housing 1 at least at its inlet end 21; the inlet end 21 of the ultrafiltration membrane assembly 2... Located at the bottom of the membrane housing 1, the product water end 22 of the ultrafiltration membrane module 2 is located at the top of the membrane housing 1; the diameter of the inlet end 21 of the ultrafiltration membrane module 2 is smaller than the inner diameter of the membrane housing 1, but the diameter of the inlet end 21 of the ultrafiltration membrane module 2 is smaller than the aperture of the inlet 110 and the product water outlet 120; the ultrafiltration membrane module 2 as a whole is larger than the aperture of the inlet 110 and the product water outlet 120, so that the inlet end 21 of the ultrafiltration membrane module 2 can generate floating motion under changes in water flow and pressure.

[0023] In this embodiment, during the filtration stage, raw water enters the membrane housing 1 from the inlet 110 and then enters the ultrafiltration membrane module 2 through the inlet 21 to be filtered to the product water end 22. During the backwashing stage, cleaning gas and backwash water enter the membrane housing 1 from the product water outlet 120, enter the ultrafiltration membrane module 2 through the product water end 22, and discharge pollutants from the inlet 21 of the ultrafiltration membrane module 2.

[0024] Furthermore, the diameter of the inlet end 21 of the ultrafiltration membrane module 2 is smaller than the inner diameter of the membrane shell 1, and this diameter difference forms a gap space that allows the inlet end 21 of the ultrafiltration membrane module 2 to float.

[0025] In one specific example, the diameter of the inlet end 21 of the ultrafiltration membrane module 2 is 209–216 cm. The inner diameter of the membrane housing 1 is 210–220 cm. Those skilled in the art will understand that the specific dimensions of the inlet end 21 of the ultrafiltration membrane module 2 and the inner diameter of the membrane housing 1 can be set according to actual needs.

[0026] As an example, the inlet diameter 21 of the ultrafiltration membrane module 2 is 209 cm, and the inner diameter of the membrane housing 1 is 210 cm, thus forming an approximately 0.5 cm annular gap, allowing the ultrafiltration membrane module 2 to float freely within a 1 cm range. This margin of safety in size design improves the stability and reliability of the system. Furthermore, a gap that is too small would limit the floating effect and fail to effectively avoid impurities in the water; a gap that is too large would cause excessive swaying of the ultrafiltration membrane module 2, affecting structural stability. The approximately 1 cm floating range provides an ideal dynamic balance, allowing the inlet 21 to automatically fine-tune its position to reduce clogging under high turbidity water conditions, while maintaining the stability of the overall structure. In actual operation, this size ratio makes the cleaning of the membrane surface more uniform and effective during the backwashing stage. Actual usage comparisons show that compared to the traditional fixed structure, backwashing efficiency is improved by more than 25%, while reducing the amount of chemical cleaning agent used by about 20%, extending the service life of the membrane module.

[0027] Preferably, the diameter of the inlet end 21 of the ultrafiltration membrane module 2 is smaller than the diameter of the middle section of the ultrafiltration membrane module 2. Specifically, this tapered or gradient design allows the inlet end 21 to maintain a smaller diameter for floating while the middle section can have a larger membrane area. This structural design increases the effective filtration area of ​​the ultrafiltration membrane while maintaining the flexibility of the inlet end 21.

[0028] In one specific example, the ultrafiltration membrane module 2 includes multiple membrane fibers. Specifically, these membrane fibers are made of materials such as polyvinylidene fluoride (PVDF), polysulfone (PS), or polyethersulfone (PES), and different membrane materials can be selected according to different application scenarios. Those skilled in the art will understand that the number and material of the membrane fibers can be set according to actual needs, and other embodiments besides this one are also possible. The design of multiple membrane fibers increases the filtration area of ​​the membrane module and increases the processing capacity per unit volume.

[0029] In this embodiment, the ultrafiltration membrane module 2 is arranged longitudinally along the membrane housing 1. This longitudinal arrangement allows for a more efficient path for water flow through the membrane fibers, reducing hydraulic losses and facilitating the flow of gas and water during backwashing. This longitudinal arrangement enhances the hydraulic stability of the entire system and improves filtration efficiency.

[0030] In one embodiment, the membrane housing 1 is provided with a concentrate outlet (not shown in the figure for simplicity). Specifically, the concentrate outlet is used to discharge concentrated contaminants generated during the filtration process. The concentrate outlet can be located at the bottom or side of the membrane housing 1 to facilitate timely discharge of contaminants. This design improves the continuous operation capability of the system and reduces the cleaning frequency.

[0031] In this embodiment, when raw water enters through inlet 110, the impact force of the water flow causes a slight floating motion at the inlet end 21 of the ultrafiltration membrane module 2. This floating motion is very effective in preventing the accumulation of contaminants on the membrane surface. Especially under high turbidity water conditions, the floating inlet end 21 can automatically adjust its position, reducing the risk of clogging. Compared with traditional stationary ultrafiltration membranes, this floating design can maintain the permeate flow rate of the ultrafiltration membrane module 2 at 52.5 LMH in highly polluted environments, which is 30% higher than the flux of traditional ultrafiltration membranes.

[0032] During the backwashing stage, cleaning gas and backwash water flow counter-currently into the ultrafiltration membrane module 2 from the product water end 22, flushing out contaminants adhering to the membrane surface. For example, the product water end 22 of the ultrafiltration membrane module 2 is fixedly connected to the product water end cap 12, while the inlet water end 21 is movable and can float freely. The impact force generated during backwashing allows the inlet water end 21 to swing freely, more effectively removing contaminants from the membrane fibers. Alternatively, both the product water end 22 and the inlet water end 21 of the ultrafiltration membrane module 2 can be movable and float freely; the impact force generated during backwashing allows the inlet water end 21 to swing freely, further effectively removing contaminants from the membrane fibers. This dynamic backwashing mechanism significantly improves cleaning efficiency. In highly polluted environments, the water flux maintenance rate of the ultrafiltration membrane module 2 increases by 30%, extending the service life of the membrane module.

[0033] In summary, the ultrafiltration membrane water treatment device proposed in this utility model has the following advantages:

[0034] By designing the inlet end of the ultrafiltration membrane module to be smaller than the inner diameter of the membrane housing, the inlet end can float freely under changes in water flow and pressure, creating a dynamic working state. This effectively avoids clogging at the inlet end and improves filtration efficiency. Simultaneously, this floating design enhances contaminant removal during backwashing, extending the membrane module's lifespan and reducing maintenance costs and frequency.

[0035] In addition, by setting a reasonable difference between the inlet diameter and the inner diameter, an appropriate floating gap space is formed, allowing the ultrafiltration membrane module to float freely within a range of less than 1 cm. This precise floating space design not only ensures that the membrane module has sufficient mobility to cope with changes in water quality, but also prevents damage that may be caused by excessive movement of the membrane module, significantly improving the system's adaptability and operational stability, and realizing a more intelligent water treatment process.

[0036] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An ultrafiltration membrane water treatment device, characterized by comprising: The membrane housing, the water inlet end cover, the water outlet end cover and the ultrafiltration membrane assembly; the top and bottom of the membrane housing are respectively provided with the water outlet end cover and the water inlet end cover; the water inlet end cover is provided with a water inlet; the water outlet end cover is provided with a water outlet; the water inlet end of the ultrafiltration membrane assembly is movably arranged in the membrane housing; the water inlet end of the ultrafiltration membrane assembly is located at the bottom of the membrane housing, and the water outlet end of the ultrafiltration membrane assembly is located at the top of the membrane housing; the diameter of the water inlet end of the ultrafiltration membrane assembly is smaller than the inner diameter of the membrane housing, so that the water inlet end of the ultrafiltration membrane assembly can produce floating movement under the change of water flow and pressure.

2. The ultrafiltration membrane water treatment device according to claim 1, wherein In the filtration stage, raw water enters the membrane housing from the water inlet and enters the ultrafiltration membrane assembly through the water inlet end of the ultrafiltration membrane assembly to be filtered to the water outlet end; in the backwashing stage, cleaning gas and backwashing water enter the membrane housing from the water outlet, enter the ultrafiltration membrane assembly through the water outlet end of the ultrafiltration membrane assembly, and discharge pollutants from the water inlet end of the ultrafiltration membrane assembly.

3. The ultrafiltration membrane water treatment device according to claim 1, wherein The diameter of the water inlet end of the ultrafiltration membrane assembly is 209-216 cm.

4. The ultrafiltration membrane water treatment device according to claim 1, wherein The inner diameter of the membrane housing is 210-220 cm.

5. The ultrafiltration membrane water treatment device according to claim 1, wherein The diameter of the water inlet end of the ultrafiltration membrane assembly is smaller than the aperture of the water inlet.

6. The ultrafiltration membrane water treatment device according to claim 1, wherein The diameter of the water inlet end of the ultrafiltration membrane assembly is smaller than the inner diameter of the membrane housing, and the difference in diameter forms a gap space allowing the water inlet end of the ultrafiltration membrane assembly to float.

7. The ultrafiltration membrane water treatment device according to claim 1, wherein The diameter of the water inlet end of the ultrafiltration membrane assembly is smaller than the middle section diameter of the ultrafiltration membrane assembly.

8. The ultrafiltration membrane water treatment device according to claim 1, wherein The ultrafiltration membrane assembly comprises a plurality of membrane filaments.

9. The ultrafiltration membrane water treatment device according to claim 1, wherein The ultrafiltration membrane assembly is arranged longitudinally along the membrane housing.

10. The ultrafiltration membrane water treatment device according to claim 1, wherein The membrane housing is provided with a concentrated water outlet.

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