Ultrafiltration equipment based on seawater desalination pretreatment

Abstract

The ultrafiltration equipment comprises an axial direction and an ultrafiltration permeation assembly, the ultrafiltration permeation assembly comprises an outer filter screen frame, an inner permeation part is arranged on the inner side of the outer filter screen frame in the axial direction, and multiple sets of through pipes are arranged between the outer filter screen frame and the inner permeation part in an annular array mode with the axis of the inner permeation part as the center; multiple sets of inner partition plates are arranged on the inner side of the inner permeation part in an annular array mode, the driving assembly comprises a driving part, the output end of the driving part is connected with an adapter plate at the foremost end in the axial direction through a shaft, the adapter plate is coaxially connected with the outer filter screen frame, and a bearing connecting plate is rotationally arranged on the end face, away from the driving part, of the adapter plate; an axial connecting mechanism is arranged on the end face, deviating from the driving component, of the bearing connecting plate. Therefore, the key technical bottlenecks of easy pollution and blockage, poor mechanical reliability, non-uniform fluid distribution and the like of the traditional ultrafiltration pretreatment equipment are effectively solved, and the equipment integration, high operation efficiency and simple maintenance are also realized.

Description

Technical Field

[0001] This application relates to the technical field of ultrafiltration permeation of seawater, and more particularly to an ultrafiltration device based on seawater desalination pretreatment. Background Technology

[0002] In the seawater desalination process, the pretreatment stage plays a crucial role in ensuring stable system operation and extending the lifespan of core equipment. Ultrafiltration, as a highly efficient membrane separation technology, is widely used in the pretreatment stage of seawater desalination to remove impurities such as suspended solids, colloids, and microorganisms, reducing the load on subsequent desalination units such as reverse osmosis. Currently, most common ultrafiltration equipment uses fixed or simple rotating membrane structures, which suffer from problems such as easy fouling of the membrane surface, frequent clogging, and difficulty in cleaning, affecting filtration efficiency and membrane lifespan.

[0003] Traditional ultrafiltration devices often have a simple structural design and low integration of drive and connection mechanisms, making it difficult to achieve efficient self-cleaning and stable operation, especially when dealing with high turbidity and highly polluted seawater.

[0004] Specifically, existing equipment lacks an effective axial drive mechanism, making it impossible to achieve multi-dimensional movement of the filter frame; the cleaning components do not fit well with the filter screen, resulting in unsatisfactory cleaning effects; and the external fixing structure is simply designed, failing to achieve effective material distribution and guidance. These problems severely restrict the operating efficiency and reliability of seawater desalination pretreatment systems.

[0005] Application content This application aims to at least partially address one of the technical problems in the related art.

[0006] Therefore, the purpose of this application is to propose an ultrafiltration device based on seawater desalination pretreatment, which effectively solves the key technical bottlenecks of traditional ultrafiltration pretreatment equipment, such as easy fouling, poor mechanical reliability, and uneven fluid distribution, and also realizes equipment integration, high-efficiency operation and simplified maintenance.

[0007] To achieve the above objectives, this application proposes an ultrafiltration device based on seawater desalination pretreatment, including an axial and an ultrafiltration permeation assembly. The ultrafiltration permeation assembly includes an outer filter screen frame, an inner permeation section is provided on the inner side of the outer filter screen frame along the axial direction, and multiple sets of through pipes are arranged in a ring array between the outer filter screen frame and the inner permeation section with the axis of the inner permeation section as the center. Multiple sets of inner baffles are arranged in a ring array on the inner side of the inner permeation section.

[0008] It also includes a drive assembly, which includes a drive component. The output end of the drive component is connected by a shaft to an adapter plate at the foremost end along the axial direction. The adapter plate is coaxially connected to the outer filter frame. The adapter plate is rotatably provided with a bearing connecting plate opposite to the end face of the drive component. The bearing connecting plate is provided with an axial connection mechanism opposite to the end face of the drive component.

[0009] In addition, the ultrafiltration equipment based on seawater desalination pretreatment proposed in the application may also have the following additional technical features: Specifically, the axial connection mechanism includes multiple sets of outer sleeves fitted along the axial direction. Each set of outer sleeves is fitted with a drive component two that sequentially pushes each set of outer sleeves. Each set of outer sleeves is movably provided with a bearing connector on its inner side. A push rod is provided on one side of the bearing connector on the inner side of the set of outer sleeves with the smallest outer diameter. The output end of the drive component two is provided with a positioning connector.

[0010] Specifically, the outer kit includes an outer sleeve, and the outer surface of the outer sleeve is provided with positioning clips in a ring array.

[0011] Specifically, the drive assembly further includes a bearing kit disposed on the adapter plate, the bearing kit including a bearing, the bearing having a positioning recess arranged in an annular array on its inner sidewall.

[0012] Specifically, the positioning connector includes an outer ring sleeved on the output end of the second drive component. The outer surface of the outer ring is provided with an outward protrusion in an annular array, and the end face of the outer ring near the top rod is provided with a ball bearing in an annular array.

[0013] Specifically, the bearing connecting plate includes a circular plate disposed inside the adapter plate via a bearing, and the circular plate has through holes arranged in a ring array parallel to the axial direction.

[0014] Specifically, it also includes a cleaning filter assembly, which includes a cleaning scraper that fits onto the surface of the outer filter frame. The cleaning scraper has a filter groove on its end face near the outer filter frame, and a sealing plate is provided on its end face away from the outer filter frame.

[0015] Specifically, it also includes an external solidification component, which includes an outer protective shell. The top surface of the outer protective shell is provided with a water inlet and a feeding inlet. A storage box located above the ultrafiltration permeation component is provided inside the outer protective shell. The storage box is provided with a discharge component near the end face of the ultrafiltration permeation component.

[0016] Specifically, the discharge component includes a discharge pipe connected to one side of the storage box, and a material guiding unit is provided inside the discharge pipe.

[0017] Specifically, the material guiding unit includes a bent material guiding frame disposed inside the discharge pipe, and an arc-shaped groove is formed on the upper surface of the material guiding frame.

[0018] The ultrafiltration device based on seawater desalination pretreatment in this application has the following beneficial effects: 1. The drive assembly rotates the external filter frame, and combined with the continuous scraping action of the fixed cleaning scraper, a strong dynamic shear force is generated on the filter membrane surface. This active self-cleaning mechanism effectively prevents suspended particles, algae, and other pollutants from forming a dense fouling layer, solving the problem of rapid pollutant deposition in highly turbid seawater.

[0019] 2. The unique axial connection mechanism adopts a multi-stage sleeve design and is equipped with a guide system consisting of positioning clips and positioning recesses. It can effectively link single and multi-stage processes to allow seawater to pass through internal permeation sections of different precision in sequence for multi-stage desalination.

[0020] 3. The inner permeation section and the outer filter screen frame are connected by multiple sets of pipes in a ring array, and the pipes and the discharge parts for conveying the pills correspond to each other, so that the pills can be added in a cyclical manner. This layout allows the fluid to flow evenly to the surface of the permeation membrane and fully circulate the addition of the reagent to accelerate the desalination of seawater.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a sectional view of the structure of this application; Figure 3 This is a schematic diagram of the ultrafiltration permeation component structure of this application; Figure 4 This is a schematic diagram of the cleaning filter assembly structure of this application; Figure 5 This is a schematic diagram of the material output structure of this application; Figure 6 This is a schematic diagram of the material feeding unit structure in this application; Figure 7 This is a schematic diagram of the driver component structure in this application; Figure 8 This is a schematic diagram of the axial connection mechanism structure of this application; Figure 9 This is a schematic diagram of the external component structure of this application; Figure 10This is a schematic diagram of the bearing kit structure in this application; Figure 11 This is a schematic diagram of the positioning connector structure in this application; Figure 12 This is a schematic diagram of the bearing connecting plate structure of this application.

[0023] As shown in the figure: 10. External fixing component; 101. Outer protective cover; 102. Water inlet; 103. Feed inlet; 104. Storage box; 105. Discharge component; 1051. Discharge pipe; 1052. Feed guide unit; 10521. Feed guide frame; 10522. Arc-shaped groove; 20. Cleaning filter assembly; 201. Sealing plate; 202. Cleaning scraper; 203. Filter tank; 30. Ultrafiltration permeation assembly; 301. External filter screen frame; 302. Internal permeation section; 303. Through pipe; 304. Internal partition; 40. Drive assembly; 4 01. Drive component; 402. Adapter plate; 403. Bearing connecting plate; 4031. Circular plate; 4032. Through hole; 404. Axial connection mechanism; 4041. Outer sleeve; 40411. Outer sleeve; 40412. Positioning clip; 4042. Drive component two; 4043. Bearing connector; 4044. Push rod; 4045. Positioning connector; 40451. Outer ring; 40452. Outer protrusion; 40453. Ball; 405. Bearing kit; 4051. Bearing one; 4052. Positioning recess. Detailed Implementation

[0024] Embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. Rather, embodiments of this application include all variations, modifications, and equivalents falling within the appended spirit and connotation.

[0025] In traditional seawater desalination pretreatment, ultrafiltration equipment uses fixed or simple rotating membrane structures. The lack of a dynamic adjustment mechanism between the outer filter frame and the internal permeation section leads to the accumulation of contaminants on the membrane surface, forming a dense fouling layer. The rigid connection between the drive assembly and the filter frame prevents synchronous multi-dimensional motion compensation in both axial and radial directions, resulting in uneven shear force distribution in localized areas of the membrane. When treating high-turbidity seawater, suspended particles and colloidal substances rapidly deposit on the outer filter frame surface, and the internal permeation section pipes undergo periodic deformation due to fluid pressure fluctuations, exacerbating the risk of membrane pore blockage.

[0026] For example, in nearshore seawater pretreatment systems, the peak concentration of suspended solids reached 150 mg / L, and the algal biomass exceeded 10^5 cells / mL. Due to the lack of an axial linkage cleaning mechanism on the surface of the external filter frame of the ultrafiltration equipment, the transmembrane pressure difference rose to 1.8 times the initial value after 2 hours of operation. Stress concentration at the connection between the internal permeation section and the connecting pipe caused microcracks, resulting in a retention rate drop below 92%. During continuous operation of the drive assembly, the difference in thermal expansion coefficients between the adapter plate and the bearing connecting plate caused a 0.15 mm axial displacement deviation, leading to mechanical interference between the external filter frame and the internal baffle.

[0027] If the above problems are not addressed, the fouling layer on the surface of the external filter frame will accelerate membrane flux decay, forcing the system to shut down for chemical cleaning every 4 hours, significantly reducing equipment utilization. Structural damage to the internal permeate tubing will cause excessive turbidity in the permeate, requiring the addition of an additional depth filtration unit. Misalignment of the drive components will cause bearing connection plate seal failure, allowing seawater to seep into the motor compartment, reducing insulation performance, and ultimately triggering a protective shutdown of the system.

[0028] Faced with the aforementioned problems, this application first considers how to achieve dynamic adjustment between the external filter frame and the internal permeation section to address the rapid deposition of pollutants caused by high-turbidity seawater. Traditional rigid connection methods result in uneven shear force distribution on the filter membrane surface. This application attempts to establish a motion compensation mechanism in three dimensions: axial, lateral, and longitudinal, improving fluid pressure fluctuations through an adjustable pipe array distribution. To address mechanical interference caused by displacement deviations of the drive components, this application explores forming a composite motion mechanism with an adapter plate and a bearing connecting plate, utilizing the axial connection mechanism to absorb differences in thermal expansion. Further analysis reveals that the coaxial rotation of the external filter frame and the internal permeation section, combined with a multi-pipe array layout, can simultaneously achieve membrane surface self-cleaning and permeation channel optimization. Ultimately, the technical path of linking the external filter frame with the adapter plate and using the bearing connecting plate to support the axial connection mechanism was determined.

[0029] like Figure 1-12 As shown, the ultrafiltration device based on seawater desalination pretreatment in this application embodiment includes an axial direction Z and an ultrafiltration permeation component 30. The ultrafiltration permeation component 30 includes an outer filter screen frame 301. An inner permeation section 302 is provided on the inner side of the outer filter screen frame 301 along the axial direction Z. Multiple sets of through pipes 303 are arranged in a ring array between the outer filter screen frame 301 and the inner permeation section 302 with the axis of the inner permeation section 302 as the center. Multiple sets of inner baffles 304 are arranged in a ring array on the inner side of the inner permeation section 302.

[0030] It should be noted that the Z-axis described in this embodiment refers to the spatial coordinate axis direction, specifically the Z-axis direction in the Cartesian coordinate system. This axis is used to determine the position and direction of movement of each component in space, ensuring structural compactness and coordinated movement. The outer filter frame 301 is a structural frame used to fix the external filter screen. It can be a ring-shaped support made of metal or polymer materials, with a permeation functional component on its inner side, forming a physical barrier separating filtration and permeation to prevent large particles from entering. The inner permeation section 302 is a permeation functional unit located inside the outer filter frame 301. It can be made of porous ceramic or polymer membrane materials and distributed along the Z-axis to achieve directional permeation, improving filtration efficiency and reducing the risk of clogging. The through-pipe 303 is a fluid channel connecting the outer filter frame 301 and the inner permeation section 302. It can be a rigid or flexible pipe arranged in a ring array, ensuring uniform fluid flow and reducing clogging caused by local pressure differences through a axial ring array distribution. The inner baffle 304 refers to the partition structure set inside the inner permeation section 302. Specifically, it can be a plate-shaped component installed vertically or at an angle, distributed in a ring array to form multiple independent permeation areas, avoiding fluid short-circuiting and improving filtration uniformity.

[0031] Furthermore, multiple internal permeation sections 302 are configured, and these sections employ a multi-stage structure connected in series. Each stage undertakes a different desalination task, and seawater flows through each stage sequentially, gradually desalinating the water. Along the Z-axis, the layers are arranged sequentially as a coarse filtration layer, an ultrafiltration layer, and a fine filtration layer. The coarse filtration layer uses relatively large pore sizes (e.g., microfiltration level, 0.1–1 micrometer), primarily intercepting larger pollutants such as suspended particles, algae, and most bacteria in the seawater. This is the first step in "gradual desalination." The ultrafiltration layer reduces the pore size to the ultrafiltration level (approximately 0.01–0.1 micrometers), further removing small-sized colloids, viruses, and large organic molecules. The fine filtration layer uses a dense separation layer (pore size <0.001 micrometers) at the nanofiltration (NF) or reverse osmosis (RO) level. This layer is responsible for the core desalination function, allowing only water molecules to pass through under external driving pressure while retaining the vast majority of salts and ions.

[0032] It also includes a drive assembly 40, which includes a drive component 401. The output end of the drive component 401 is connected by a shaft to a transition plate 402 at the front end along the Z-axis. The transition plate 402 is coaxially connected to an outer filter frame 301. The end face of the transition plate 402 opposite to the drive component 401 is provided with a bearing connecting plate 403. The end face of the bearing connecting plate 403 opposite to the drive component 401 is provided with an axial connection mechanism 404.

[0033] It should be noted that the drive component 401 refers to the mechanical unit that provides rotational power. Specifically, it can be an electric motor or a hydraulic motor as the drive source. It is coaxially connected to the outer filter screen frame 301 through the adapter plate 402 to realize the rotation of the filter screen to enhance its self-cleaning ability. The adapter plate 402 refers to the transition structure connecting the drive component 401 and the outer filter screen frame 301. Specifically, it is a metal disc or flange. It transmits rotational power through the bearing connecting plate 403 while maintaining axial stability.

[0034] The bearing connecting plate 403 refers to the load-bearing structure supporting the rotating component. Specifically, it can be a circular plate with through holes, which is movably connected to the adapter plate 402 via bearings to reduce frictional resistance and ensure rotational accuracy. The axial connection mechanism 404 refers to a mechanical connection device extending along the axial direction. Specifically, it can use multi-stage sleeves in conjunction with drive components to achieve axial extension and contraction, used to adjust the spacing between components to adapt to different working conditions.

[0035] In one embodiment of this application, such as Figure 7 and Figure 8 As shown, the axial connection mechanism 404 includes multiple sets of outer sleeves 4041 sleeved along the axial direction Z. The outer sleeves 4041 are fitted with a drive component 4042 that sequentially pushes each set of outer sleeves 4041. The bearing connector 4043 is movably arranged inside each set of outer sleeves 4041. A push rod 4044 is provided on one side of the bearing connector 4043 located inside the set of outer sleeves 4041 with the smallest outer diameter. The output end of the drive component 4042 is provided with a positioning connector 4045.

[0036] It should be noted that the outer sleeve 4041 described in this embodiment adopts a multi-stage sleeve structure. Axial expansion and contraction are achieved between adjacent sleeves through clearance fit. The second drive component 4042 is disposed on the outer protective shell 101, and its output end is connected to the smallest sleeve. When the second drive component 4042 is running, it linearly outputs and sequentially pushes each stage of sleeve. The bearing connector 4043 forms a sliding fit with the inner side of the outer sleeve 4041. The push rod 4044 is connected to the end of the bearing connector 4043 on the inner side of the smallest sleeve and is used to transmit axial displacement. The positioning connector 4045 is included in the annular structure fixed to the output end of the second drive component 4042. Its surface is provided with protrusions above the balls to limit the radial displacement of the outer sleeve 4041.

[0037] Specifically, after the second drive component 4042 is activated, axial expansion and contraction are achieved between adjacent sleeves through a clearance fit. Upon activation, the output end of the second drive component 4042 pushes the positioning connector 4045 to move axially along the Z-axis. The contact surface between the ball bearings and the outer sleeve 4041 reduces frictional resistance, allowing the outer sleeve 4041 to expand or contract gradually. The push rod 4044 pushes the minimum sleeve displacement, transmitting axial thrust to the external connecting component. The multi-stage sleeve design of the outer sleeve 4041 allows for adjustable axial length, and the clearance fit ensures no jamming between sleeves during expansion and contraction. The protruding portion 40452 of the positioning connector 4045 forms a limit with the inner wall of the outer sleeve 4041, preventing radial sway. This structure achieves precise control of the axial connection through mechanical linkage, improving the equipment's adaptability to different working conditions.

[0038] In one embodiment of this application, such as Figure 8 and Figure 9 As shown, the outer sleeve 4041 includes an outer sleeve 40411, and the outer surface of the outer sleeve 40411 is provided with positioning clips 40412 in a ring array.

[0039] The outer sleeve 40411, serving as the main structure of the outer assembly 4041, is a hollow cylindrical shape, with its inner cavity accommodating the bearing connector 4043. Positioning clips 40412 are fixed to the outer surface of the outer sleeve 40411 in a ring array, forming multiple circumferentially distributed protrusions. The positioning clips 40412 form a clearance fit with the positioning recesses 4052 of the bearing assembly 405, restricting the radial displacement of the outer sleeve 40411 during movement.

[0040] In one embodiment of this application, such as Figure 7 and Figure 10 As shown, the drive assembly 40 also includes a bearing kit 405 disposed on the adapter plate 402. The bearing kit 405 includes a bearing 4051, and the inner sidewall of the bearing 4051 is provided with a positioning recess 4052 in an annular array.

[0041] It should be noted that during the axial movement of the bearing 4051 in the axial connection mechanism 404, the positioning clip 40412 on the axial connection mechanism 404 is limited and fitted in the positioning recess 4052. In order to ensure that each outer sleeve 40411 is connected to each bearing 4051, the length of the positioning clip 40412 on the outer wall of each outer sleeve 40411 is set according to actual needs.

[0042] In one embodiment of this application, such as Figure 7 and Figure 10As shown, the positioning connector 4045 includes an outer ring 40451 sleeved on the output end of the drive component 4042. The outer surface of the outer ring 40451 is provided with an outward protrusion 40452 in an annular array, and the end face of the outer ring 40451 near the top rod 4044 is provided with a ball bearing 40453 in an annular array.

[0043] It should be noted that the outer ring 40451 in the positioning connector 4045 is made of metal and formed into a hollow cylindrical structure. Its inner diameter is interference-fitted with the output end of the drive component 4042. The outward protrusions 40452 have a trapezoidal cross-section and are evenly distributed along the circumference of the outer ring 40451. The balls 40453 are made of zirconia ceramic and are embedded into the end face of the outer ring 40451 at fifteen-degree intervals through an annular retainer. The height of the protruding end face of each ball 40453 is controlled within the range of 0.5 mm to 1 mm.

[0044] In one embodiment of this application, such as Figure 12 As shown, the bearing connecting plate 403 includes a circular plate 4031 disposed inside the adapter plate 402 via a bearing, and through holes 4032 parallel to the axial direction Z are arranged in an annular array on the circular plate 4031.

[0045] It should be noted that the circular plate 4031 forms a rotational support structure with the adapter plate 402 through the bearing, and the through holes 4032 are evenly distributed in the circumferential direction and extend axially.

[0046] In a preferred embodiment, a deep groove ball bearing can be used to achieve bidirectional load bearing, and the diameter of the through hole is controlled within the range of 0.3 to 0.5 times the thickness of the 402 adapter plate. The spacing between the through holes is set to 1.2 to 1.5 times the hole diameter to form equally distributed fluid channels.

[0047] In one embodiment of this application, such as Figure 2 , Figure 3 and Figure 4 As shown, it also includes a cleaning filter assembly 20, which includes a cleaning scraper 202 that is attached to the surface of the outer filter frame 301. The cleaning scraper 202 has a filter groove 203 on its end face near the outer filter frame 301, and a sealing plate 201 is provided on the end face of the cleaning scraper 202 away from the outer filter frame 301.

[0048] It should be noted that the cleaning scraper 202 is in direct contact with the surface of the outer filter frame 301. The friction generated by axial rotation scrapes away contaminants adhering to the surface of the outer filter frame 301. Filter holes are formed on the contact surfaces of the cleaning scraper 202 and the outer filter frame 301. The filter groove 203 extends along the contact surface of the cleaning scraper 202 to collect the scraped-off impurities. The sealing plate 201 is fixed to the back of the cleaning scraper 202, forming a closed space to prevent the diffusion of collected impurities. The sealing plate 201 is also installed on the outer protective housing 101 with bolts or screws for easy assembly and disassembly.

[0049] In one embodiment of this application, such as Figure 1 and Figure 2 As shown, it also includes an outer solid component 10, which includes an outer protective shell 101. The top surface of the outer protective shell 101 is provided with a water inlet 102 and a feeding inlet 103. The inner side of the outer protective shell 101 is provided with a storage box 104 located above the ultrafiltration permeation component 30. The storage box 104 is provided with a discharge component 105 near the end face of the ultrafiltration permeation component 30.

[0050] It should be noted that the outer casing 101 is made of corrosion-resistant metal material, and its internal cavity forms a clearance fit with the outer contour of the ultrafiltration permeation component 30. The water inlet 102 and the feed inlet 103 are respectively connected to the external water supply pipeline and the reagent addition device through flanges, and their axes are perpendicular to the top surface of the outer casing 101. The storage tank 104 is located inside the outer casing 101. Both the water inlet 102 and the feed inlet 103 are connected to the storage tank 104. The seawater is directly poured into the outer casing 101, while the reagent falls into the inner permeation section 302 through the discharge device 105.

[0051] In one embodiment of this application, such as Figure 2 , Figure 5 and Figure 6 As shown, the discharge component 105 includes a discharge pipe 1051 connected to one side of the storage box 104, and a guide unit 1052 is provided inside the discharge pipe 1051.

[0052] The material guiding unit 1052 includes a bent material guide frame 10521 disposed in the discharge pipe 1051, and an arc-shaped groove 10522 is formed on the upper surface of the material guide frame 10521.

[0053] It should be noted that the bent design of the guide frame 10521 guides the material to flow along a preset path, avoiding direct impact on the outlet of the discharge pipe 1051. Furthermore, the arc-shaped groove 10522 on the upper surface of the guide frame 10521 reduces material flow resistance and constrains the material, ensuring its uniform distribution.

[0054] Specifically, the steps for desalinating seawater using an ultrafiltration device are as follows: High-turbidity seawater to be treated is poured into the outer casing 101 through the inlet pipe 102, while simultaneously, the required coagulant, bactericide, and other chemical pellets are added through the feed pipe 103. The pellets flow out through the outlet 105 and move within the feed guiding unit 1052, being horizontally and evenly guided through the arc-shaped groove 10522 to the ultrafiltration permeation component 30 below.

[0055] The drive unit 401 is operated, which drives the entire outer filter frame 301 to rotate at a certain speed via the adapter plate 402. Multiple outer filter frames 301 are separated by partitions provided inside the outer protective shell 101. Each outer filter frame 301 is provided with a different inner permeation section 302. Seawater is first transported to the outer filter frame 301 on the side closest to the drive unit 401, and then gradually filled into the inner permeation section 302 at the rear during the subsequent ultrafiltration and permeation treatment.

[0056] During the driving process, multiple ultrafiltration permeation components 30 are connected together and rotated synchronously. This activates the second driving component 4042, which pushes the push rod 4044 to move. The push rod 4044 then pushes the innermost bearing connector 4043, causing the multi-stage outer components 4041 to extend and retract sequentially like a sleeve, achieving axial length adjustment in the Z direction. During this process, the positioning clip 40412 and the positioning recess 4052 on the bearing assembly 405 cooperate to ensure precise extension and retraction without radial wobble. During the extension process, multiple sets of ultrafiltration permeation components 30 are connected sequentially. During rotation, the through hole 4032 aligns with the hole on the adapter plate 402, allowing water to flow and satisfying the requirement of seawater undergoing desalination treatment by sequentially passing through different inner permeation sections 302.

[0057] When cleaning the ultrafiltration permeation module 30: the stationary cleaning scraper 202 is in close contact with the surface of the rotating outer filter frame 301, and the cleaning scraper 202 scrapes off the impurities attached to the surface of the outer filter frame 301. The scraped-off impurities are collected through the filter tank 203.

[0058] In summary, the ultrafiltration equipment based on seawater desalination pretreatment in this application effectively solves the key technical bottlenecks of traditional ultrafiltration pretreatment equipment, such as easy fouling, poor mechanical reliability, and uneven fluid distribution. It also achieves equipment integration, high-efficiency operation, and simplified maintenance.

[0059] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An ultrafiltration device based on seawater desalination pretreatment, characterized in that, The device includes an axial (Z) and ultrafiltration permeation assembly (30). The ultrafiltration permeation assembly (30) includes an outer filter frame (301). An inner permeation section (302) is provided on the inner side of the outer filter frame (301) along the axial (Z) direction. Multiple sets of through pipes (303) are arranged in a ring array between the outer filter frame (301) and the inner permeation section (302) with the axis of the inner permeation section (302) as the center. Multiple sets of inner baffles (304) are arranged in a ring array on the inner side of the inner permeation section (302). It also includes a drive assembly (40), which includes a drive component (401). The output end of the drive component (401) is connected by a shaft to a transition plate (402) at the foremost end along the axial direction (Z). The transition plate (402) is coaxially connected to the outer filter frame (301). The transition plate (402) is rotatably provided with a bearing connecting plate (403) away from the end face of the drive component (401). The bearing connecting plate (403) is provided with an axial connection mechanism (404) away from the end face of the drive component (401).

2. The ultrafiltration device based on seawater desalination pretreatment according to claim 1, characterized in that, The axial connection mechanism (404) includes multiple sets of outer sleeves (4041) fitted along the axial direction (Z). Each set of outer sleeves (4041) is fitted with a drive component (4042) that sequentially pushes each set of outer sleeves (4041). Each set of outer sleeves (4041) is movably provided with a bearing connector (4043). A push rod (4044) is provided on one side of the bearing connector (4043) located inside the set of outer sleeves (4041) with the smallest outer diameter. The output end of the drive component (4042) is provided with a positioning connector (4045).

3. The ultrafiltration device based on seawater desalination pretreatment according to claim 2, characterized in that, The outer sleeve (4041) includes an outer sleeve (40411), and the outer surface of the outer sleeve (40411) is provided with positioning clips (40412) in a ring array.

4. The ultrafiltration device based on seawater desalination pretreatment according to claim 1, characterized in that, The drive assembly (40) further includes a bearing kit (405) disposed on the adapter plate (402), the bearing kit (405) including a bearing (4051), the inner sidewall of the bearing (4051) being provided with a positioning recess (4052) in an annular array.

5. The ultrafiltration device based on seawater desalination pretreatment according to claim 2, characterized in that, The positioning connector (4045) includes an outer ring (40451) sleeved on the output end of the drive component (4042). The outer surface of the outer ring (40451) is provided with an outward protrusion (40452) in an annular array. The end face of the outer ring (40451) near the top rod (4044) is provided with a ball bearing (40453) in an annular array.

6. The ultrafiltration device based on seawater desalination pretreatment according to claim 1, characterized in that, The bearing connecting plate (403) includes a circular plate (4031) disposed inside the adapter plate (402) via a bearing, and the circular plate (4031) has through holes (4032) arranged in an annular array parallel to the axial direction (Z).

7. The ultrafiltration device based on seawater desalination pretreatment according to claim 1, characterized in that, It also includes a cleaning filter assembly (20), which includes a cleaning scraper (202) that fits onto the surface of the outer filter frame (301). The cleaning scraper (202) has a filter groove (203) on its end face near the outer filter frame (301), and a sealing plate (201) is provided on the end face of the cleaning scraper (202) away from the outer filter frame (301).

8. The ultrafiltration device based on seawater desalination pretreatment according to claim 1, characterized in that, It also includes an external solid assembly (10), which includes an outer protective shell (101). The top surface of the outer protective shell (101) is provided with a water inlet (102) and a feeding inlet (103). The inner side of the outer protective shell (101) is provided with a storage box (104) located above the ultrafiltration permeation assembly (30). The storage box (104) is provided with a discharge part (105) near the end face of the ultrafiltration permeation assembly (30).

9. The ultrafiltration device based on seawater desalination pretreatment according to claim 8, characterized in that, The discharge component (105) includes a discharge pipe (1051) connected to one side of the storage box (104), and a guide unit (1052) is provided inside the discharge pipe (1051).

10. The ultrafiltration device based on seawater desalination pretreatment according to claim 9, characterized in that, The material guiding unit (1052) includes a bent material guide frame (10521) disposed in the discharge pipe (1051), and an arc-shaped groove (10522) is formed on the upper surface of the material guide frame (10521).

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