Fluid processing membrane device

Abstract

This application relates to a fluid treatment membrane device, comprising a housing, multiple inner cylinders sequentially nested within the cavity of the housing, with a fluid channel formed between adjacent inner cylinders for fluid flow, and a flow gap formed between the outermost inner cylinder and the housing for fluid flow; multiple baffles spaced apart on the inner wall of the housing, each baffle being inclined relative to the centerline of the cavity; multiple support frames spaced apart on the outer wall of the first inner cylinder, the contact surfaces between the baffles and the support frames located on a predetermined cylindrical surface, the axis of the predetermined cylindrical surface coinciding with the centerline of the cavity; and a power drive mechanism connected to all the inner cylinders to drive them to rotate around the centerline of the cavity, with adjacent inner cylinders rotating in opposite directions. This fluid treatment membrane device not only solves the technical problem of uneven filtrate distribution in the prior art but also improves treatment efficiency and enhances device stability.

Description

Technical Field

[0001] This invention relates to the field of membrane module technology, and more specifically to a fluid processing membrane device. Background Technology

[0002] Nanofiltration membranes, as a highly efficient separation technology, have been widely used in water treatment, particularly in wastewater purification, industrial water recovery, and drinking water safety. With pore sizes between reverse osmosis and ultrafiltration, nanofiltration membranes effectively retain organic matter, color substances, and some multivalent ions with molecular weights ranging from hundreds to thousands, while allowing water molecules and certain monovalent ions to pass through. This characteristic gives them significant advantages in removing organic pollutants and color from surface water, softening groundwater hardness, concentrating fruit juice, and separating pharmaceuticals.

[0003] However, existing nanofiltration membrane modules still have certain limitations in practical applications. One common problem is the non-uniformity of the filtrate passing through the membrane. Due to the uneven membrane structure and fluid distribution, some membranes may be overused, leading to frequent cleaning needs, while others may be underutilized, reducing overall nanofiltration efficiency and membrane lifespan. Furthermore, uneven fluid distribution can cause localized excessively high or low concentrations, affecting treatment performance and system stability.

[0004] Therefore, designing a novel nanofiltration membrane module that can uniformly distribute filtrate, fully utilize the membrane, extend its service life, and reduce cleaning frequency during wastewater treatment has become an important research direction. Summary of the Invention

[0005] This application provides a fluid treatment membrane device to solve the technical problem in the prior art where the unevenness of the filtrate passing through the filter membrane leads to insufficient use of the filter membrane, affecting the treatment effect and the stability of the device.

[0006] To address the aforementioned technical problems, this application provides a fluid processing membrane device, comprising:

[0007] A shell, which has an internal cavity;

[0008] Multiple inner cylinders are arranged inside the cavity of the shell and nested in sequence. A fluid channel is formed between two adjacent inner cylinders for fluid to flow through. A flow gap is formed between the outermost inner cylinder and the shell for fluid to flow through.

[0009] Multiple baffles are spaced apart on the inner wall of the shell, and each baffle is inclined relative to the center line of the cavity;

[0010] Multiple support frames are spaced apart on the outer wall of the first inner cylinder, and the contact surfaces between the multiple partitions and the multiple support frames are located on a predetermined cylindrical surface, with the axis of the predetermined cylindrical surface coinciding with the center line of the cavity;

[0011] The power drive mechanism is connected to multiple inner cylinders to drive them to rotate around the center line of the cavity, and to make the rotation directions of two adjacent inner cylinders opposite.

[0012] Furthermore, the multiple inner cylinders include a first inner cylinder, a second inner cylinder, and a third inner cylinder, which are nested sequentially, with a flow gap formed between the first inner cylinder and the shell.

[0013] Furthermore, the first inner cylinder, the second inner cylinder, and the third inner cylinder are respectively equipped with an internal meshing gear, a double meshing gear, and an external meshing gear. The power drive mechanism includes a motor, a first gear, and a second gear. The output shaft of the motor is coaxially connected to the first gear. The first gear meshes with the internal meshing gear and the double meshing gear, and the second gear meshes with the double meshing gear and the external meshing gear, so as to realize that the first inner cylinder and the third inner cylinder rotate in the same direction, and the second inner cylinder rotates in the opposite direction to the first inner cylinder.

[0014] Furthermore, the fluid treatment membrane device also includes a reflux structure, which includes a reflux groove opened at one end of the housing and a reflux shroud disposed on the outside of the housing and communicating with the reflux groove, so that the incompletely filtered fluid flows into the reflux shroud through the reflux groove.

[0015] Furthermore, the return channel is annular, and the return channel is arranged around the center line of the cavity of the housing. The return channel is located at one end of the housing near the power drive mechanism.

[0016] Furthermore, the inner wall of the shell is provided with multiple inclined plates, and at least one inclined plate is provided between two adjacent partitions. The end face of one end of the inclined plate is used to form a reflux groove. The height of the inclined plate gradually decreases along the direction away from the reflux groove. The height direction of the inclined plate is the radial direction of the cavity of the shell.

[0017] Furthermore, a baffle is provided between the shell and the return shroud, and the baffle contacts the outer wall of the first inner cylinder of the outermost inner cylinder among the multiple inner cylinders.

[0018] Furthermore, the support assembly also includes a plurality of wave-shaped first support frames and second support frames. One end of each first support frame is mounted on the outer wall of the second inner cylinder via a first fixing block, and the second end of each first support frame is a free end. Each first support frame extends along the extension direction of the second inner cylinder, and the plurality of first support frames are arranged around the second inner cylinder. One end of each second support frame is mounted on the outer wall of the third inner cylinder via a second fixing block, and the second end of each second support frame is a free end. Each second support frame extends along the extension direction of the third inner cylinder, and the plurality of second support frames are arranged around the third inner cylinder.

[0019] Furthermore, a plurality of first baffle blocks are provided on the outer side of the second inner cylinder, each first baffle block extending along the extension direction of the second inner cylinder, and the cross section of each first baffle block perpendicular to its extension direction is surrounded by three first outer peripheries, one of which is connected to the outer wall of the second inner cylinder; and / or a plurality of second baffle blocks are provided on the outer side of the third inner cylinder, each second baffle block extending along the extension direction of the third inner cylinder, and the cross section of each second baffle block perpendicular to its extension direction is surrounded by three second outer peripheries, one of which is connected to the outer wall of the third inner cylinder.

[0020] Furthermore, one end of the housing is provided with an end cap, which is provided with a liquid outlet pipe and a through hole for at least part of the power drive mechanism to pass through.

[0021] The fluid treatment membrane device provided in this application mainly includes core components such as a shell, an inner cylinder assembly, baffles, a support frame, and a power drive mechanism. The shell forms a closed cavity to accommodate the inner cylinder assembly and the fluid during the fluid treatment process. The inner cylinder assembly consists of multiple nested inner cylinders, with fluid channels formed between adjacent cylinders and a flow gap between the outermost cylinder and the shell to facilitate fluid introduction and discharge. Multiple baffles are evenly distributed on the inner wall of the shell and are inclined relative to the centerline of the cavity. This inclined design, combined with a specific contact method between the baffles and the support frame of the first inner cylinder, effectively guides the fluid to form a uniform flow within the cavity, preventing excessive fluid concentration or eddy currents in certain areas. The fluid treatment membrane device of this application not only solves the technical problem of uneven filtrate distribution in existing technologies but also improves treatment efficiency and enhances device stability through a series of innovative designs. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 A perspective schematic diagram of an embodiment of a fluid processing membrane device according to the present invention is shown;

[0024] Figure 2 A three-dimensional, disassembled structural schematic diagram of an embodiment of a fluid processing membrane device according to the present invention is shown.

[0025] Figure 3 An embodiment of the fluid treatment membrane device according to the present invention is shown. Figure 2 A magnified view of a section at point A in the middle;

[0026] Figure 4An embodiment of the fluid treatment membrane device according to the present invention is shown. Figure 2 A magnified view of a section at point B in the middle;

[0027] Figure 5 A longitudinal cross-sectional view of one embodiment of a fluid treatment membrane device according to the present invention is shown;

[0028] Figure 6 An embodiment of the fluid treatment membrane device according to the present invention is shown. Figure 5 A magnified view of a section at point C;

[0029] Figure 7 An embodiment of the fluid treatment membrane device according to the present invention is shown. Figure 5 A partial sectional view from another perspective.

[0030] The above figures include the following reference numerals:

[0031] 1. End cap; 2. Housing; 3. Return hood; 4. First inner cylinder; 5. Second inner cylinder; 6. First fixing block; 7. Second fixing block; 8. Third inner cylinder; 9. Through hole; 10. Liquid outlet pipe; 11. Mounting bracket; 12. Motor; 13. First gear; 14. Second gear; 15. Partition plate; 16. Inclined plate; 17. Internal meshing gear; 18. First support frame; 19. Double meshing gear; 20. Support frame; 21. First baffle block; 22. External meshing gear; 23. Liquid inlet hole; 24. Second baffle block; 25. Second support frame; 26. Return groove; 27. Baffle plate; 28. Stop block. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0034] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0035] This application provides a fluid processing membrane device, comprising: a housing 2 having an internal cavity; a plurality of inner cylinders disposed within the cavity of the housing 2, with adjacent inner cylinders sequentially nested together to form a fluid channel for fluid flow; and a flow gap for fluid flow formed between the outermost inner cylinder and the housing; a plurality of partitions 15 spaced apart on the inner wall of the housing 2, each partition being inclined relative to the centerline of the cavity; a plurality of support frames 20 spaced apart on the outer wall of a first inner cylinder 4, the contact surfaces between the partitions 15 and the support frames being located on a predetermined cylindrical surface, the axis of which coincides with the centerline of the cavity; and a power drive mechanism connected to the plurality of inner cylinders to drive the plurality of inner cylinders to rotate around the centerline of the cavity, with adjacent inner cylinders rotating in opposite directions.

[0036] The fluid treatment membrane device of this application significantly enhances the turbulence effect of the fluid in the fluid channel by making the rotation directions of adjacent inner cylinders opposite, thereby improving filtration efficiency and cleaning effect. It solves the technical problem of uneven filtrate distribution in existing technologies and, through a series of innovative designs, achieves improved treatment effect and enhanced device stability.

[0037] In the above embodiment, the main components include a housing 2, an inner cylinder assembly, baffles 15, a support frame 20, and a power drive mechanism. The housing 2 forms a closed cavity to accommodate the inner cylinder assembly and fluid during the fluid processing. The inner cylinder assembly consists of multiple nested inner cylinders, with fluid channels formed between adjacent cylinders and a flow gap between the outermost cylinder and the housing 2, facilitating fluid introduction and discharge. Multiple baffles 15 are evenly distributed on the inner wall of the housing 2 and are inclined relative to the centerline of the cavity. This inclined design, combined with the specific contact method between the baffles 15 and the support frame 20 of the first inner cylinder 4, effectively guides the fluid to form a uniform flow within the cavity, preventing excessive fluid concentration or eddy currents in certain areas. By making the rotation directions of adjacent inner cylinders opposite, the fluid forms reciprocating turbulence within the fluid channels, enhancing the contact between the fluid and the filter membrane and improving the filtration effect. This design also helps clean impurities from the inner cylinder surface, preventing membrane clogging and extending the device's service life. In practical applications, this device can effectively treat high-turbidity water and improve water quality. It is suitable for industrial wastewater treatment, urban sewage treatment, and seawater desalination, and has extremely high practical value.

[0038] Specifically, the device comprises multiple inner cylinders, including a first inner cylinder 4, a second inner cylinder 5, and a third inner cylinder 8. The first inner cylinder 4, the second inner cylinder 5, and the third inner cylinder 8 are nested sequentially, forming a flow gap between the first inner cylinder and the shell. The flow gap between the first inner cylinder 4 and the shell 2 increases the fluid processing path and improves filtration accuracy and efficiency. This flow gap is maintained by multiple baffles 15 and multiple support frames 20. The contact surfaces of the baffles 15 and the support frames 20 are designed on a predetermined cylindrical surface, the axis of which coincides with the center line of the cavity of the shell 2. This design ensures a uniform distribution of the flow gap, making the fluid flow between the first inner cylinder 4 and the shell 2 more uniform and avoiding localized excessively high or low flow velocities. This nested design increases the processing path and improves filtration accuracy through fluid flow between multiple inner cylinders, making it particularly suitable for industrial applications with high fluid purity requirements, such as semiconductor manufacturing and biopharmaceuticals. In semiconductor manufacturing, the purity of fluids directly affects product quality. This device effectively removes tiny particles and impurities from fluids through sequential filtration via multiple inner cylinders, meeting the stringent requirements for fluid purity in semiconductor manufacturing. This improves production efficiency and reduces production costs, playing a significant role in promoting the development of the semiconductor industry.

[0039] In the above embodiment, the fluid first enters through the inlet of the housing 2, and then begins the processing within the flow gap between the housing 2 and the first inner cylinder 4. The nested structure of the first inner cylinder 4, the second inner cylinder 5, and the third inner cylinder 8 allows the fluid to flow within the fluid channels formed between the multiple inner cylinders. Each time the fluid passes through an inner cylinder, impurities and contaminants in the fluid have the opportunity to be further filtered and removed. After the fluid passes through the flow gap between the first inner cylinder 4 and the housing 2, the first inner cylinder 4 begins to rotate due to the action of the power drive mechanism. During rotation, the fluid is guided to the fluid channel between the second inner cylinder 5 and the first inner cylinder 4. Through the reverse rotation of the second inner cylinder 5, the fluid forms a reciprocating turbulent flow, further improving the filtration efficiency and cleaning effect. Subsequently, the fluid enters the fluid channel between the third inner cylinder 8 and the second inner cylinder 5, and after further processing in the third inner cylinder 8, it is finally discharged through the outlet of the third inner cylinder 8. In this process, the multi-layer design of the fluid channel makes the fluid treatment more thorough. At the same time, by controlling the rotation speed and direction of the inner cylinder, it can be optimized for different treatment needs, such as improving the turbulence effect of the fluid to remove small particles, or adjusting the flow rate to adapt to fluids of different concentrations.

[0040] Specifically, the first inner cylinder 4, the second inner cylinder 5, and the third inner cylinder 8 are respectively equipped with an internal meshing gear 17, a double meshing gear 19, and an external meshing gear 22. The power drive mechanism includes a motor 12, a first gear 13, and a second gear 14. The output shaft of the motor is coaxially connected to the first gear. The first gear meshes with both the internal meshing gear 17 and the double meshing gear 19, and the second gear meshes with both the double meshing gear 19 and the external meshing gear 22, so as to achieve the same-direction rotation of the first inner cylinder 4 and the third inner cylinder 8, and the opposite-direction rotation of the second inner cylinder 5. This gear transmission system ensures precise control of the inner cylinder rotation, improves the stability and reliability of fluid handling, and is suitable for occasions requiring precise control of fluid handling processes, such as laboratory research and precision instrument cleaning. In laboratory research, fluid handling requires precise control to ensure the accuracy and repeatability of experimental results.

[0041] This device achieves precise control of the rotational speed and direction of the inner cylinder through a gear transmission system, which helps to ensure uniform treatment of the experimental fluid and improves the reliability of experimental results. It plays an important supporting role in scientific research and experimental teaching. The output shaft of the motor 12 is coaxially connected to the first gear 13. The first gear 13 drives the internal meshing gear 17 through rotation, thereby driving the first inner cylinder 4 to rotate. At the same time, the first gear 13 also meshes with the double meshing gear 19. Through the rotation of the intermediate shaft of the double meshing gear 19, it drives the second gear 14, which meshes with it, to rotate. The second gear 14 then drives the third inner cylinder 8 to rotate through meshing with the external meshing gear 22. Since the first gear 13 directly drives the internal meshing gear 17 and the double meshing gear 19, and the double meshing gear 19 indirectly drives the second gear 14 and the external meshing gear 22, the number of teeth of the double meshing gear 19 can be set to be different from the number of teeth of the internal meshing gear 17 and the external meshing gear 22, thereby controlling the rotation direction of the second inner cylinder 5 to be opposite to that of the first inner cylinder 4 and the third inner cylinder 8. Specifically, when the motor 12 starts, the first gear 13 rotates accordingly, and the first inner cylinder 4 starts to rotate through meshing with the inner meshing gear 17; at the same time, through meshing with the double meshing gear 19, the double meshing gear 19 drives the second gear 14 meshing with it to rotate, and then through the meshing of the second gear 14 with the outer meshing gear 22, the third inner cylinder 8 is driven to rotate.

[0042] Due to the special design of the double-meshing gear 19, its meshing method differs from that of the first gear 13 and the second gear 14, allowing the second inner cylinder 5 to rotate in the opposite direction to the first inner cylinder 4 and the third inner cylinder 8. This rotation direction setting significantly enhances the turbulence effect during fluid treatment, improves filtration efficiency, and reduces fluid deposition and clogging on the inner cylinder surface, thus extending the service life of the membrane module.

[0043] Specifically, the fluid treatment membrane device also includes a reflux structure, which includes a reflux channel 26 located at one end of the housing 2, and a reflux shroud 3 located on the outside of the housing 2 and communicating with the reflux channel, so that incompletely filtered fluid flows into the reflux shroud through the reflux channel. The reflux channel is located at one end of the housing 2, and its main function is to collect fluid that fails to pass through the filter membrane in one pass, i.e., incompletely filtered fluid. This fluid, because it failed to achieve the required filtration effect during the initial pass, is guided to the reflux channel.

[0044] The design of the return hood helps improve processing efficiency and cleaning effectiveness, making it particularly suitable for scenarios with strict requirements for the thoroughness of fluid treatment, such as drinking water purification and medical equipment sterilization. The combination of the return tank and the return hood forms a closed-loop circulation path, allowing fluids that have not met filtration standards to return to the treatment process without waste or discharge. This design increases the number of fluid circulations, improves filtration accuracy, and is especially effective for treating high-viscosity fluids or fluids containing a large number of suspended particles, such as in fine chemical and food processing applications. It effectively avoids fluid short-circuiting, improves fluid treatment uniformity, thereby improving product quality and reducing energy consumption. Simultaneously, it avoids the direct discharge of untreated fluids, reducing potential environmental pollution and embodying the principles of environmental protection and resource conservation.

[0045] The reflux structure design increases the number of fluid circulation cycles, improving filtration thoroughness. It is particularly effective for treating fluids containing high concentrations of pollutants, such as in wastewater treatment and oil-water separation. In wastewater treatment, the concentration of pollutants in the fluid can be very high, and a single filtration often fails to achieve the desired purification effect. The reflux structure design allows the fluid to circulate and filter multiple times, significantly improving purification efficiency and reducing pollutant emissions. This is of great significance for environmental protection and resource recovery.

[0046] Specifically, the return trough 26 is annular, positioned around the centerline of the cavity of the housing, and located at the end of the housing near the power drive mechanism. This annular design ensures uniform distribution of unfiltered fluid, preventing localized overload and facilitating subsequent circulation. Especially when treating fluids containing high concentrations of pollutants, the return trough ensures multiple filtration cycles, significantly improving purification efficiency and reducing pollutant emissions, which is of great importance for environmental protection and resource recovery.

[0047] The return hood is located on the outside of the housing 2 and communicates with the return channel 26. Its function is to collect the fluid flowing out of the return channel and redirect it back into the fluid treatment cycle. This means that incompletely filtered fluid is not directly discharged but re-enters the treatment process through the return hood, thereby increasing the fluid's treatment time in the membrane module and further improving filtration thoroughness. The annular return channel design ensures uniform fluid distribution, avoids localized overload, and improves the overall treatment efficiency and service life of the device, making it particularly suitable for large-scale fluid treatment systems such as municipal wastewater treatment and industrial wastewater purification.

[0048] The annular reflux trough design ensures uniform fluid circulation within the casing, preventing uneven treatment caused by localized excessively fast or slow fluid flow. This uniform fluid circulation is particularly effective in urban wastewater treatment and industrial wastewater purification, significantly improving treatment efficiency and reducing energy consumption, thus making a vital contribution to environmental protection and energy conservation.

[0049] Specifically, the inner wall of the shell is provided with multiple inclined plates 16, and at least one inclined plate 16 is provided between two adjacent partitions 15. The end face of one end of the inclined plate 16 is used to form a return channel 26. The height of the inclined plate 16 gradually decreases along the direction away from the return channel 26, wherein the height direction of the inclined plate 16 is the radial direction of the cavity of the shell 2. The design of the inclined plate 16 allows the fluid to flow along the guiding direction of the inclined plate after entering the flow gap between the shell and the first inner cylinder 4, increasing the radial flow path of the fluid, ensuring that the fluid is evenly distributed throughout the flow gap, avoiding excessive concentration of fluid in certain areas, and improving the uniformity of fluid processing.

[0050] The gradually decreasing inclination angle and height of the inclined plate 16 help create turbulence within the fluid channel. This turbulence enhances the contact between the fluid and the filter membrane, improving filtration efficiency. Especially in industrial wastewater treatment, water purification, and chemical fluid processing, turbulence helps remove suspended particles and dissolved substances, improving the cleanliness and lifespan of the filter membrane. One end face of the inclined plate 16 forms a return channel 26, ensuring that incompletely filtered fluid can be redirected back to the return channel, increasing fluid processing time and improving purification efficiency.

[0051] The presence of the reflux trough prevents some fluid from accumulating at one end of the shell, thus preventing localized concentration changes that could adversely affect fluid treatment. Baffles 15 are evenly distributed on the inner wall of the shell 2, cooperating with the support frame 20 to maintain the flow gap between the first inner cylinder 4 and the shell 2, ensuring uniform fluid flow between the inner cylinder and the shell, and improving the efficiency and effectiveness of fluid treatment. The baffles 15 also provide support, especially under high-speed rotation conditions, ensuring stable rotation of the inner cylinder, preventing deformation or vibration of the shell, and guaranteeing the stable operation of the entire device. The reflux trough 26 mainly collects fluid that fails to pass through the filter membrane in one pass, i.e., incompletely filtered fluid, ensuring that this fluid can re-enter the treatment cycle, increasing the fluid treatment time and improving the thoroughness of filtration.

[0052] The coordinated design of the inclined plate 16, baffle 15, and return channel 26 ensures uniform distribution and circulation of fluid within the shell cavity, avoiding local overload and fluid short-circuiting, and improving the uniformity and efficiency of fluid treatment. The gradually decreasing height of the inclined plate 16 helps to gradually increase the fluid velocity in the direction away from the return channel 26. This design can compensate for the difference in utilization rate caused by the different order of fluid contact with the inner cylinder sidewall, ensuring the efficiency and effectiveness of the entire treatment process.

[0053] The inclined plate design facilitates fluid guidance and distribution, enhances fluid turbulence, and improves filtration efficiency. It is particularly suitable for applications requiring enhanced fluid turbulence to improve filtration, such as the treatment of high-viscosity fluids and the removal of suspended particulate matter. By guiding the fluid flow direction, the inclined plate design enhances fluid turbulence, aiding in the removal of suspended particulate matter, especially in the treatment of high-viscosity fluids in industries such as petroleum, chemical, and food processing. This design can effectively improve fluid processing efficiency, reduce energy consumption, and improve product quality, resulting in a significant effect on improving industrial production efficiency and reducing production costs.

[0054] Specifically, a baffle 28 is provided between the housing 2 and the return shroud 3, and the baffle 28 contacts the outer wall of the outermost inner cylinder among multiple inner cylinders. The baffle design prevents the fluid from short-circuiting directly between the return shroud and the housing, ensuring the fluid follows a complete treatment path, improving filtration efficiency and cleaning effect. This is suitable for scenarios with strict requirements for the thoroughness of fluid treatment, such as drinking water purification and medical equipment sterilization. The baffle design ensures that the fluid follows a complete treatment path within the housing, avoiding fluid short-circuiting and improving the thoroughness and efficiency of treatment. In drinking water purification and medical equipment sterilization, this design can effectively remove bacteria and impurities from the fluid, improving fluid purity, which has a significant impact on protecting human health and improving the safety of medical equipment use.

[0055] Specifically, the support assembly also includes a plurality of wave-shaped first support frames 18. One end of each first support frame 18 is mounted on the outer wall of the second inner cylinder 5 via a first fixing block 6, and the second end of each first support frame 18 is a free end. Each first support frame 18 extends along the extension direction of the second inner cylinder 5, and the plurality of first support frames 18 are arranged around the second inner cylinder 5. The support assembly also includes wave-shaped second support frames 25. One end of each second support frame 25 is mounted on the outer wall of the third inner cylinder 8 via a second fixing block 7, and the second end of each second support frame 25 is a free end. Each second support frame 25 extends along the extension direction of the third inner cylinder 8, and the plurality of second support frames 25 are arranged around the third inner cylinder 8. The first support frames 18 are mounted on the outer wall of the second inner cylinder 5 via the first fixing block 6, and these support frames extend along the extension direction of the second inner cylinder 5 and are arranged around the second inner cylinder 5. This design ensures the stability and structural support of the second inner cylinder 5 during rotation, avoids deformation or vibration that may occur under high-speed rotation, and guarantees the continuity and stability of fluid processing.

[0056] The wavy first support frame 18, when fluid enters the fluid channel between the first inner cylinder 4 and the second inner cylinder 5, helps guide the fluid to form reciprocating turbulence, increasing the contact area and frequency between the fluid and the nanofiltration membrane on the surface of the second inner cylinder 5, thereby enhancing the filtration effect. It also helps clean impurities from the inner cylinder surface, preventing membrane clogging. When the motor 12 drives the first inner cylinder 4 and the third inner cylinder 8 to rotate in the same direction, and the second inner cylinder 5 to rotate in the opposite direction, the wavy design of the first support frame 18 ensures uniform fluid distribution under the different rotational actions of the inner cylinders, avoiding reduced filtration efficiency due to uneven fluid distribution. The second support frame 25 is mounted on the outer wall of the third inner cylinder 8 via the second fixing block 7, extending along the extension direction of the third inner cylinder 8 and surrounding it. This provides additional support for the third inner cylinder 8, ensuring its stability during rotation. Similar to the first support frame 18, the wavy second support frame 25 also plays a role in guiding the fluid to form turbulence during fluid processing.

[0057] When fluid enters the fluid channel between the second inner cylinder 5 and the third inner cylinder 8, the second support frame 25 helps to further homogenize the fluid distribution and enhances the interaction between the fluid and the nanofiltration membrane on the surface of the third inner cylinder 8, improving filtration efficiency and cleaning effect. The presence of the second support frame 25, in conjunction with the drive of the motor 12, makes the rotation of the third inner cylinder 8 more stable. The wave-like design, opposite to the rotation direction of the inner cylinder, helps to form dense fluid contact between adjacent inner cylinders, thereby improving the efficiency of the entire nanofiltration process. The wave-like design of the first support frame 18 and the second support frame 25, combined with the guidance of the baffle 15 and the inclined plate 16, and the rotation of the inner cylinder, jointly ensure that the fluid, after entering the cavity of the shell 2, can form a uniform distribution and circulation among the multiple inner cylinders, avoiding excessively high or low local flow velocities and ensuring the uniformity and efficiency of fluid treatment.

[0058] Specifically, a plurality of first baffle blocks 21 are provided on the outer side of the second inner cylinder 5. Each first baffle block 21 extends along the extension direction of the second inner cylinder 5. The cross section of each first baffle block 21 perpendicular to its extension direction is surrounded by three first outer peripheries, and one first outer periphery is connected to the outer wall of the second inner cylinder. A plurality of second baffle blocks 24 are provided on the outer side of the third inner cylinder 8. Each second baffle block 24 extends along the extension direction of the third inner cylinder 8. The cross section of each second baffle block 24 perpendicular to its extension direction is surrounded by three second outer peripheries, and one second outer periphery is connected to the outer wall of the third inner cylinder 8.

[0059] Of the three outer peripheries of the first baffle block 21, one is in close contact with the outer wall of the second inner cylinder 5, while the other two outer peripheries protrude into the fluid channel between the second inner cylinder 5 and the first inner cylinder 4. This design alters the flow path of the fluid within this channel, preventing a single straight-line flow when the fluid contacts the second inner cylinder 5. Instead, it generates a more complex fluid motion, which is beneficial for creating a uniform turbulent effect, thereby improving the contact efficiency between the fluid and the nanofiltration membrane on the surface of the second inner cylinder 5.

[0060] The cross-section of the first baffle block 21 is designed as a triangle. This shape can reduce the probability of the fluid forming vortices under high-speed rotation. The reduction of vortices helps the fluid to be distributed more evenly, improving the filtration effect. At the same time, it reduces the resistance of the fluid to the second inner cylinder 5, indirectly reducing the energy consumption during the operation of the device.

[0061] When the first inner cylinder 4 and the third inner cylinder 8 rotate in the same direction, while the second inner cylinder 5 rotates in the opposite direction, the specific design of the first baffle block 21, combined with the rotation direction of the inner cylinders, further guides the fluid to form a reciprocating flow. This flow pattern enhances the interaction between the fluid and the filter membrane, improving filtration efficiency and cleaning effect. The synergistic effect of the second baffle block 24 and the third inner cylinder 8: flow optimization and eddy reduction: Similar to the first baffle block 21, the second baffle block 24 is designed to be arranged along the extension direction of the third inner cylinder 8 on its outer side. The cross-section perpendicular to the extension direction consists of three second outer peripheries, one of which is connected to the outer wall of the third inner cylinder 8. This design also changes the flow characteristics of the fluid in the fluid channel between the third inner cylinder 8 and the second inner cylinder 5, preventing the formation of eddies when the fluid contacts the third inner cylinder 8, thus improving the uniformity of fluid distribution and filtration efficiency.

[0062] The design of the second baffle block 24 takes into account the rotation direction of the third inner cylinder 8, coordinating with the rotation of the first inner cylinder 4, the second inner cylinder 5, and the third inner cylinder 8. This ensures that the fluid forms an effective and uniform fluid movement when passing through the third inner cylinder 8, further improving the efficiency and effectiveness of fluid treatment. Synergistic effect of the first baffle block 21 and the second baffle block 24: Fluid movement optimization: The first baffle block 21 and the second baffle block 24 work together during fluid treatment, changing the flow path of the fluid in the channel between adjacent inner cylinders. This avoids the formation of eddies when the fluid contacts the inner cylinder, optimizes fluid movement, and improves filtration efficiency.

[0063] The triangular cross-section design of the baffle reduces fluid flow resistance and energy consumption during fluid treatment, playing a crucial role in improving the economic efficiency and environmental friendliness of the equipment. The presence of the baffle, combined with the rotation direction of the inner cylinder, helps to create reciprocating turbulence within the fluid channel. This turbulence effectively cleans deposits on the inner cylinder surface, preventing membrane clogging and extending the lifespan of the membrane module. The baffle design effectively prevents short-circuiting during fluid rotation, ensuring uniform fluid distribution and improving treatment efficiency. It is particularly suitable for applications requiring the avoidance of short-circuiting and ensuring uniform fluid treatment, such as fine chemicals and food processing. The baffle design improves treatment efficiency by preventing short-circuiting during fluid rotation and ensuring uniform fluid distribution. In fine chemicals and food processing, fluid treatment requires avoiding localized overheating or undercooling and ensuring uniform fluid treatment. This design effectively prevents short-circuiting, improves fluid treatment uniformity, and has a significant effect on improving the quality of chemical products and food while reducing energy consumption.

[0064] Specifically, an end cap is provided at one end of the housing, and the end cap has an outlet pipe and a through hole for at least part of the power drive mechanism to pass through. The end cap 1 is located at one end of the housing 2, typically the outlet end after fluid treatment, and serves to seal the housing and support the outlet pipe and power drive mechanism. The end cap 1 not only provides a closed structure to prevent fluid leakage during treatment, but also provides the necessary support and positioning for the installation of the outlet pipe and power drive mechanism, ensuring the structural stability and operational safety of the entire device. The outlet pipe 10, as the outlet of the purified fluid, mainly functions to safely and efficiently remove the fluid filtered by the nanofiltration membrane module from the device for subsequent use or discharge. The arrangement of the outlet pipe 10, in coordination with the layout of the filtration membrane module inside the housing, ensures uniform flow and sufficient filtration of the fluid during treatment, thereby improving the overall efficiency and effect of fluid treatment.

[0065] The design of the through-hole 9 allows the output shaft of the power drive mechanism (such as motor 12) to pass through the end cover 1 and enter the housing, thereby transmitting power to the first gear 13, which in turn drives the rotation of the first inner cylinder 4, the second inner cylinder 5, and the third inner cylinder 8. The position and size design of the through-hole 9 must consider its compatibility with the power drive mechanism to ensure that the output shaft can pass through smoothly. At the same time, the fixation of the end cover 1 enhances the structural stability of the entire device, reduces vibration and noise during operation, and improves the service life and safety of the device. The arrangement of the liquid outlet pipe 10 on the end cover 1 and the through-hole 9, in coordination with the layout of the filter membrane assembly (including the first inner cylinder 4, the second inner cylinder 5, and the third inner cylinder 8) inside the housing, optimizes the fluid inlet and outlet paths, achieves uniform fluid distribution and efficient filtration, and significantly improves the overall efficiency of fluid treatment.

[0066] The tight fit between the end cap 1 and the housing 2, and the precise positioning of the output shaft of the power drive mechanism by the through hole 9, jointly ensure the structural stability of the device under high-speed rotation, reduce component wear caused by vibration, and extend the service life of the device. Reduced energy consumption: The combination of the first baffle block 21 and the second baffle block 24 with the rotation of the inner cylinder assembly reduces the eddy current effect in fluid flow, lowering energy consumption during fluid processing. This has significant economic benefits in long-term industrial applications. The above design makes the installation and disassembly of the power drive mechanism and the outlet pipe more convenient, facilitating device maintenance and cleaning, reducing maintenance costs, and improving the operability and maintenance efficiency of the device.

[0067] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0068] The fluid treatment membrane device provided in this application significantly enhances the turbulence effect of the fluid in the fluid channel by making the adjacent inner cylinders rotate in opposite directions, thereby improving filtration efficiency and cleaning effect. Simultaneously, by setting a reflux structure, incompletely filtered fluid can be redirected back, increasing the fluid treatment time and further improving the thoroughness of filtration. The design of the support assembly ensures the stable rotation of the inner cylinder, while the corrugated first and second support frames, as well as the first and second baffle blocks, effectively prevent short-circuiting of the fluid during rotation, ensuring uniform fluid distribution and improving the treatment effect.

[0069] Furthermore, this device has a compact structure, is easy to operate, and is suitable for various fluid processing scenarios such as water treatment, chemical industry, and pharmaceutical industry, with broad application prospects and significant economic benefits. More importantly, the design concept of this device can be further expanded. For example, by adjusting the number and size of the inner cylinder, the rotation speed, and the structure of the fluid channels, it can be optimized for different types of fluids and different processing needs to achieve more efficient and precise fluid processing.

[0070] Meanwhile, the modular design of the device simplifies maintenance and upgrades, reduces long-term operating costs, and enhances its market competitiveness. This design concept allows for optimization based on different fluid types and processing needs by adjusting the number, size, rotation speed, and fluid channel structure of the inner cylinders, achieving more efficient and precise fluid treatment. For example, when processing chemical fluids with high concentrations of organic matter, increasing the number of inner cylinders and rotation speed can improve filtration efficiency; when processing pharmaceutical fluids with low concentrations of suspended particles, appropriately increasing the size of the fluid channels can reduce fluid resistance and increase processing speed.

[0071] This flexible design enables the device to adapt to various industrial application scenarios, enhancing its market competitiveness and application value. Simultaneously, the modular design simplifies maintenance and upgrades, reducing long-term operating costs and significantly improving industrial production efficiency while lowering production costs. It should be noted that the terminology used herein is for describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0072] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0073] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fluid processing membrane device, characterized in that it comprises: The shell (2) has a cavity inside; Multiple inner cylinders are arranged in the cavity of the shell (2). The multiple inner cylinders are nested in sequence, and a fluid channel for fluid to flow through is formed between two adjacent inner cylinders. A flow gap for fluid to flow through is formed between the outermost inner cylinder and the shell. Support component, the support component includes: Multiple partitions (15) are spaced apart on the inner wall of the shell (2); Each of the partitions (15) is arranged at an angle relative to the centerline of the cavity; Multiple support frames (20) are spaced apart on the outer wall of the first inner cylinder (4). The contact surfaces between the multiple partitions (15) and the multiple support frames (20) are located on a predetermined cylindrical surface, and the axis of the predetermined cylindrical surface coincides with the center line of the cavity. A power drive mechanism is connected to all of the inner cylinders to drive the inner cylinders to rotate around the center line of the cavity, and to make the rotation directions of two adjacent inner cylinders opposite.

2. The fluid processing membrane device according to claim 1, characterized in that, The plurality of inner cylinders include a first inner cylinder (4), a second inner cylinder (5) and a third inner cylinder (8), which are nested in sequence, and the flow gap is formed between the first inner cylinder (4) and the shell (2).

3. The fluid processing membrane apparatus according to claim 2, characterized in that, The first inner cylinder (4), the second inner cylinder (5), and the third inner cylinder (8) are respectively equipped with an internal meshing gear (17), a double meshing gear (19), and an external meshing gear (22). The power drive mechanism includes a motor (12), a first gear (13), and a second gear (14). The output shaft of the motor (12) is coaxially connected to the first gear (13). The first gear (13) meshes with the internal meshing gear (17) and the double meshing gear (19) respectively. The second gear (14) meshes with the double meshing gear (19) and the external meshing gear (22) respectively, so as to realize that the first inner cylinder (4) and the third inner cylinder (8) rotate in the same direction, and the second inner cylinder (5) rotates in the opposite direction to the first inner cylinder (4).

4. The fluid processing membrane apparatus according to claim 1, characterized in that, The fluid treatment membrane device further includes a reflux structure, which includes a reflux groove (26) opened at one end of the housing (2) and a reflux hood (3) disposed on the outside of the housing (2) and communicating with the reflux groove (26), so that the unfiltered fluid flows into the reflux hood (3) through the reflux groove (26).

5. The fluid processing membrane apparatus according to claim 4, characterized in that, The return channel (26) is annular and is arranged around the center line of the cavity of the housing (2). The return channel (26) is located at one end of the housing (2) near the power drive mechanism.

6. The fluid processing membrane apparatus according to claim 4, characterized in that, The inner wall of the housing (2) is provided with a plurality of inclined plates (16), and at least one inclined plate (16) is provided between two adjacent partitions (15). The end face of one end of the inclined plate (16) is used to form the return groove (26). The height of the inclined plate (16) gradually decreases along the direction away from the return groove (26). The height direction of the inclined plate (16) is the radial direction of the cavity of the housing (2).

7. The fluid processing membrane apparatus according to claim 4, characterized in that, A baffle (28) is provided between the housing (2) and the return shroud (3), and the baffle (28) contacts the outer wall of the first inner cylinder (4) of the outermost inner cylinder among the plurality of inner cylinders.

8. The fluid processing membrane apparatus according to claim 2 or 3, characterized in that, The support assembly further includes a plurality of wave-shaped first support frames (18), one end of each first support frame (18) being mounted on the outer wall of the second inner cylinder (5) via a first fixing block (6), the second end of each first support frame (18) being a free end, each first support frame (18) extending along the extension direction of the second inner cylinder (5), and the plurality of first support frames (18) being arranged around the second inner cylinder (5); and / or, the support assembly further includes a wave-shaped second support frame (25), one end of each second support frame (25) being mounted on the outer wall of the third inner cylinder (8) via a second fixing block (7), the second end of each second support frame (25) being a free end, each second support frame (25) extending along the extension direction of the third inner cylinder (8), and the plurality of second support frames (25) being arranged around the third inner cylinder (8).

9. The fluid processing membrane apparatus according to claim 2 or 3, characterized in that, The outer side of the second inner cylinder (5) is provided with a plurality of first baffle blocks (21), each of the first baffle blocks (21) extending along the extension direction of the second inner cylinder (5), and the cross section of each of the first baffle blocks (21) perpendicular to its extension direction is surrounded by three first outer peripheries, one of the first outer peripheries being connected to the outer wall of the second inner cylinder (5); and / or the outer side of the third inner cylinder (8) is provided with a plurality of second baffle blocks (24), each of the second baffle blocks (24) extending along the extension direction of the third inner cylinder (8), and the cross section of each of the second baffle blocks (24) perpendicular to its extension direction is surrounded by three second outer peripheries, one of the second outer peripheries being connected to the outer wall of the third inner cylinder (8).

10. The fluid treatment membrane apparatus according to any one of claims 1 to 7, characterized in that, One end of the housing (2) is provided with an end cap (1), and the end cap (1) is provided with a liquid outlet pipe (10) and a through hole (9) for at least part of the power drive mechanism to pass through.

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