Membrane element flow guide structure, water treatment device and water treatment system

Abstract

The utility model relates to a membrane element flow guide structure, a water treatment device and a water treatment system. The flow guide structure comprises a flow guide partition plate and a filter membrane, the flow guide partition plate is arranged on one side of the filtering membrane; a plurality of water flowing channels are formed between the flow guide partition plates; a plurality of communicating holes are formed in the flow guide partition plate, and the different water flowing channels are communicated through the communicating holes. According to the membrane element flow guide structure provided by the invention, the communicating holes which are distributed in a staggered manner are designed in the flow guide partition plate, so that a plurality of water flow channels in the flow guide partition plate can be communicated with one another, the anti-pollution and anti-blocking performance of the membrane element is improved, the contact area between the flow guide partition plate and a filtering membrane is reduced, and the effective filtering area of the membrane element is increased.

Description

Technical Field

[0001] This application relates to a flow guiding structure for a membrane element, applicable to the field of membrane filtration technology. Background Technology

[0002] Membrane filtration is a crucial and mature application in current water treatment and water reuse processes. The specific process of membrane filtration utilizes membrane elements of various materials and filtration grades to filter or separate liquids and materials, improving the quality of the permeate or the concentrate. Specifically, membrane filtration employs microfiltration, which utilizes the principle of sieving. Special treatment is applied to the filter material to create widely distributed micropores. As water passes through these micropores, suspended solids and impurities larger than the micropore size are retained, achieving water purification.

[0003] In the specific process, water entering through the inlet is filtered by the membrane. Suspended solids and other impurities gradually accumulate during filtration, affecting the water production rate or quality. Therefore, after a fixed filtration period, backwashing is required to flush away and discharge the trapped contaminants, restoring the performance of the filtration equipment. To avoid or reduce the accumulation and fouling of suspended solids and other impurities on the membrane surface, the surface flow rate of the concentrate on the membrane surface is generally increased to create a tangential force that flushes the membrane surface.

[0004] Existing membrane filtration products are diverse and widely used, with various structural forms, mainly including hollow fiber, flat sheet, and spiral wound membrane modules. The two sides of the filter membrane connect the inlet liquid, concentrate, and permeate. Depending on the process, air inlet and outlet ports may also be provided. The basic operating process involves different combinations of procedures such as permeate production, cross-flow circulation, backwashing, and flushing.

[0005] Existing spiral wound membrane filtration products consist of a concentrate flow support material in the middle and membrane bags on both sides in a "multi-layer structure" assembly. This means that the membrane bag, concentrate flow support material, and membrane bag are stacked one after another and tightly wound around the central water collection pipe to form a membrane element. This element is then installed in a cylindrical pressure vessel to form a spiral wound membrane module.

[0006] The drawback of existing spiral wound membrane filtration products is that the channels of their flow guiding structure cannot be connected, which affects the distribution and uniformity of water flow on the concentrate side. When a single channel becomes clogged, the flushing and backwashing efficiency is low.

[0007] Therefore, the existing technology requires a membrane element flow guiding structure. Utility Model Content

[0008] The purpose of this application is to design a membrane element flow guiding structure, a water treatment device, and a water treatment system, aiming to solve the problem of flow guiding in existing membrane element channels and improve the flushing and backwashing efficiency of membrane elements.

[0009] This application relates to a flow guiding structure for a membrane element, the flow guiding structure including a flow guiding baffle and a filter membrane; the flow guiding baffle is disposed on one side of the filter membrane; multiple flow channels are formed between the flow guiding baffles; multiple connecting holes are provided on the flow guiding baffles, and different flow channels are connected through the connecting holes.

[0010] In some embodiments, the filter membrane includes a first filter membrane and a second filter membrane; a flow guide baffle is disposed between the first filter membrane and the second filter membrane; a plurality of upper flow channels are formed between the flow guide baffle and the first filter membrane; a plurality of lower flow channels are formed between the flow guide baffle and the second filter membrane; the upper flow channels and the lower flow channels are connected by a connecting hole.

[0011] In some embodiments, the flow guide baffle is a corrugated plate, and an upper flow channel is formed in the trough of the corrugated plate along the transverse direction between the corrugated plate and the first filter membrane; a lower flow channel is formed in the transverse direction between the corrugated plate and the second filter membrane at the crest of the corrugated plate.

[0012] In some embodiments, the connecting holes include upper connecting holes and lower connecting holes; a plurality of upper connecting holes are longitudinally disposed on the crests between the corrugated plate and the first filter membrane; and / or, a plurality of lower connecting holes are longitudinally disposed on the crests between the corrugated plate and the second filter membrane.

[0013] In some implementations, two adjacent upper water flow channels are connected by an upper connecting hole in the flow channel; two adjacent lower water flow channels are connected by a lower connecting hole in the flow channel.

[0014] In some implementations, the upper connecting holes of multiple flow channels are located on the same straight line along the longitudinal direction; the lower connecting holes of multiple flow channels are located on the same straight line along the longitudinal direction.

[0015] In some implementations, the upper water channels on the same side are also connected by upper connecting holes; the lower water channels on the same side are also connected by lower connecting holes.

[0016] In some implementations, the area between the flow guide baffle and the filter membrane is a concentrate flow area, and the flow channel is a concentrate flow channel.

[0017] This application also provides a water treatment device, including a membrane element, wherein the membrane element is the membrane element flow guiding structure described above.

[0018] This application also provides a water treatment system, including a membrane element, wherein the membrane element is the membrane element flow guiding structure described above.

[0019] The membrane element flow guiding structure, water treatment device, and water treatment system proposed in this application have the following technical advantages:

[0020] (1) The membrane element flow guiding structure proposed in this application, by designing interlocking connecting holes on its flow guiding baffle, enables multiple water flow channels on the flow guiding baffle to be interconnected, and the water distribution between the flow guiding baffle and the filter membrane is uniformly distributed, reducing the impact of single water flow channel blockage on flow rate.

[0021] (2) The membrane element flow guiding structure proposed in this application, by designing interlocking connecting holes on its flow guiding baffle, enables multiple water flow channels on the flow guiding baffle to be interconnected, thereby improving the recovery speed and effect during rinsing and backwashing.

[0022] (3) The membrane element flow guiding structure proposed in this application, by designing interlocking connecting holes on its flow guiding baffle, enables multiple water flow channels on the flow guiding baffle to be interconnected, thereby improving the anti-fouling performance of the membrane element, reducing the contact area between the flow guiding baffle and the filter membrane, and increasing the effective filtration area of ​​the membrane element. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a membrane element flow guiding structure according to this application. Figure 1 .

[0024] Figure 2 This is a schematic diagram of a membrane element flow guiding structure according to this application. Figure 2 .

[0025] Figure 3 This is a schematic diagram of the working operation of a membrane element flow guiding structure according to this application.

[0026] Figure 4 This is a partial schematic diagram of a membrane element flow guiding structure according to this application. Figure 1 .

[0027] Figure 5 This is a partial schematic diagram of a membrane element flow guiding structure according to this application. Figure 2 .

[0028] In the diagram: 1. Corrugated flow guide baffle; 2. Filter membrane; 21. Upper filter membrane; 22. Lower filter membrane; 3. Upper connecting hole of the flow channel; 4. Lower connecting hole of the flow channel; 5. Flow channel; 51. Upper flow channel; 52. Lower flow channel. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be arbitrarily combined with each other. Those skilled in the art will understand that a membrane element flow guiding structure of this application can be applied to membrane element filtration for water treatment or feed liquid treatment.

[0030] like Figure 1-5 As shown, this application discloses a membrane element flow guiding structure, which includes a flow guiding baffle 1 and a filter membrane 2. The flow guiding baffle 1 is disposed on one side of the filter membrane 2. Multiple parallel water channels 5 are formed between the flow guiding baffle 1 and the flow guiding baffle 2. Furthermore, multiple connecting holes are provided on the flow guiding baffle 1, and different water channels 5 are connected through the connecting holes, thereby realizing the connection between multiple water channels 5, improving the anti-fouling performance of the membrane element, and reducing the contact area between the flow guiding baffle and the filter membrane, thereby increasing the effective filtration area of ​​the membrane element.

[0031] like Figure 1-5 As shown, in some embodiments, the filter membrane 2 is an ultrafiltration membrane, a nanofiltration membrane, or a reverse osmosis membrane. Specifically, the filter membrane 2 includes a first filter membrane 21 and a second filter membrane 22; wherein, a flow guide baffle 1 is disposed between the first filter membrane 21 and the second filter membrane 22 to achieve fluid guidance between the first filter membrane 21 and the second filter membrane 22. Further, a plurality of upper flow channels 51 are formed between the flow guide baffle 1 and the first filter membrane 21; a plurality of lower flow channels 52 are formed between the flow guide baffle 1 and the second filter membrane 22; specifically, the upper flow channels 51 and the lower flow channels 52 are connected through connecting holes to achieve communication between the upper and lower flow channels. Further, the plurality of upper flow channels 51 are connected through connecting holes to achieve communication between the upper flow channels. Further, the plurality of lower flow channels 52 are connected through connecting holes to achieve communication between the lower flow channels. In the above scheme, by designing multiple connecting holes to connect each water flow channel 5, the fluid flow between the first filter membrane 21 and the second filter membrane 22 is guided and cross-flowed, thereby increasing the flow rate, improving the anti-fouling performance of the membrane element, and increasing the effective filtration area of ​​the membrane element.

[0032] like Figure 1-5 As shown, in some embodiments, the flow guide baffle 1 is designed as a corrugated plate. Specifically, an upper flow channel 51 is formed transversely between the corrugated plate and the first filter membrane 21 at the trough of the corrugated plate. Further, a lower flow channel 52 is formed transversely between the corrugated plate and the second filter membrane 22 at the crest of the corrugated plate. The upper flow channel 51 and the lower flow channel 52 are staggered on the troughs and crests of the corrugated plate, thereby forming a convection structure and improving the flow guiding effect.

[0033] like Figure 1-5As shown, in some embodiments, the connecting holes include upper connecting holes 3 and lower connecting holes 4; specifically, the upper connecting holes 3 and lower connecting holes 4 are staggered on the corrugated plate. Further, multiple upper connecting holes 3 are longitudinally disposed on the crests between the corrugated plate and the first filter membrane 21. Further, multiple lower connecting holes 4 are longitudinally disposed on the crests between the corrugated plate and the second filter membrane 22. Specifically, the maximum aperture of the connecting holes is located on the crests and troughs of the corrugated plate, thus increasing the flow area.

[0034] like Figure 1-5 As shown, in some embodiments, two adjacent upper water flow channels 51 are connected by an upper connecting hole 3, realizing the conduction between the upper water flow channels. Two adjacent lower water flow channels 52 are connected by a lower connecting hole 4, realizing the conduction between the lower water flow channels, thereby improving the overall flow guiding effect of the upper and lower flow surfaces.

[0035] like Figure 1-5 As shown, in some embodiments, multiple upper connecting holes 3 of the flow channels are located on the same straight line along the longitudinal direction; multiple lower connecting holes 4 of the flow channels are located on the same straight line along the longitudinal direction; this can improve the flow guiding effect through the transversely staggered connecting hole structure.

[0036] like Figure 1-5 As shown, in some embodiments, the upper water channels 51 on the same side are also connected by the upper connecting hole 3, and the lower water channels 52 on the same side are also connected by the lower connecting hole 4, thereby improving the overall flow guiding effect of the upper and lower flow surfaces.

[0037] like Figure 1-5 As shown, in some embodiments, the space between the flow guide baffle 1 and the filter membrane 2 is designed as a concentrate side, and the water flow channel 5 is a concentrate flow channel, so as to realize the diversion and discharge of concentrate and improve the rinsing effect of the membrane element.

[0038] This application also provides a water treatment device, including a membrane element, wherein the membrane element is the membrane element flow guiding structure described above.

[0039] This application also provides a water treatment system, including a membrane element, wherein the membrane element is the membrane element flow guiding structure described above.

[0040] The membrane element flow guiding structure designed in this application utilizes a corrugated baffle plate with interlocking connecting holes to create a mesh-like flow guiding structure that facilitates turbulent flow. This results in uniform fluid distribution and stable flow on the concentrate side of the membrane element. The corrugated baffle plate can withstand higher concentrations of suspended solids in the concentrate, increasing tangential velocity, shear force, and reducing membrane fouling tendency. Simultaneously, it reduces the cross-flow pressure drop of the concentrate-side fluid passing through the membrane module, saving energy and making it more suitable for feedwater with high suspended solids.

[0041] The problem to be solved is to enable interconnected openings between different flow channels of the corrugated concentrate guide baffle of the membrane element, so that the guide baffle forms a structure in which multiple concentrate flow channels are interconnected in space. This improves the anti-fouling performance and recovery performance of the membrane element after fouling. At the same time, it reduces the contact area between the corrugated concentrate guide baffle and the filter membrane, increasing the effective filtration area of ​​the filter membrane. The membrane element guide structure, water treatment device, and water treatment system proposed in this application have the following technical advantages:

[0042] (1) The membrane element flow guiding structure proposed in this application, by designing interlocking connecting holes on its flow guiding baffle, enables multiple water flow channels on the flow guiding baffle to be interconnected, and the water distribution between the flow guiding baffle and the filter membrane is uniformly distributed, reducing the impact of single water flow channel blockage on flow rate.

[0043] (2) The membrane element flow guiding structure proposed in this application, by designing interlocking connecting holes on its flow guiding baffle, enables multiple water flow channels on the flow guiding baffle to be interconnected, thereby improving the recovery speed and effect during rinsing and backwashing.

[0044] (3) The membrane element flow guiding structure proposed in this application, by designing interlocking connecting holes on its flow guiding baffle, enables multiple water flow channels on the flow guiding baffle to be interconnected, thereby improving the anti-fouling performance of the membrane element, reducing the contact area between the flow guiding baffle and the filter membrane, and increasing the effective filtration area of ​​the membrane element.

[0045] Although the embodiments disclosed in this application are as described above, the content is merely for the purpose of facilitating understanding of this application and is not intended to limit this application. Any person skilled in the art to which this application pertains may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application; however, the scope of patent protection of this application shall still be determined by the scope defined in the appended claims.

Claims

1. A flow guiding structure for a membrane element, characterized in that The water guiding structure comprises a water guiding baffle (1) and a filter membrane (2); the water guiding baffle (1) is arranged on one side of the filter membrane (2); the water guiding baffle (1) and the water guiding baffle (1) form a plurality of water flowing channels (5); a plurality of communication holes are arranged on the water guiding baffle (1), and the water flowing channels (5) are communicated through the communication holes.

2. The membrane element flow guide structure of claim 1, wherein, The filter membrane (2) comprises a first filter membrane (21) and a second filter membrane (22); the water guiding baffle (1) is arranged between the first filter membrane (21) and the second filter membrane (22); a plurality of upper water flowing channels (51) are formed between the water guiding baffle (1) and the first filter membrane (21); a plurality of lower water flowing channels (52) are formed between the water guiding baffle (1) and the second filter membrane (22); and the upper water flowing channels (51) and the lower water flowing channels (52) are communicated through the communication holes.

3. The membrane element flow guide structure of claim 2, wherein, The water guiding baffle (1) is a corrugated plate, the corrugated plate and the first filter membrane (21) form the upper water flowing channels (51) in the valleys of the corrugated plate in the transverse direction, and the corrugated plate and the second filter membrane (22) form the lower water flowing channels (52) in the peaks of the corrugated plate in the transverse direction.

4. The membrane element flow guide structure of claim 3, wherein, The communication holes comprise upper flow channel communication holes (3) and lower flow channel communication holes (4); a plurality of the upper flow channel communication holes (3) are arranged on the peaks between the corrugated plate and the first filter membrane (21) in the longitudinal direction; and / or a plurality of the lower flow channel communication holes (4) are arranged on the peaks between the corrugated plate and the second filter membrane (22) in the longitudinal direction.

5. The membrane element flow guide structure of claim 4, wherein, The upper water flowing channels (51) are communicated through the upper flow channel communication holes (3) between adjacent two upper water flowing channels (51); and the lower water flowing channels (52) are communicated through the lower flow channel communication holes (4) between adjacent two lower water flowing channels (52).

6. The membrane element flow guide structure of claim 4, wherein, The upper flow channel communication holes (3) are arranged on the same straight line in the longitudinal direction; and the lower flow channel communication holes (4) are arranged on the same straight line in the longitudinal direction.

7. The membrane element flow guide structure of claim 4, wherein, The upper water flowing channels (51) on the same side are also communicated through the upper flow channel communication holes (3); and the lower water flowing channels (52) on the same side are also communicated through the lower flow channel communication holes (4).

8. The membrane element flow guide structure of any one of claims 1 to 7, wherein, The water guiding baffle (1) and the filter membrane (2) form a concentrated water measuring structure, and the water flowing channels (5) are concentrated water flowing channels.

9. A water treatment apparatus comprising a membrane element, characterised in that, The membrane element is the membrane element water guiding structure in any one of claims 1 to 8.

10. A water treatment system comprising a membrane element, characterised in that, The membrane element is the membrane element water guiding structure in any one of claims 1 to 8.

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