Integrated forward osmosis membrane assembly structure

Abstract

The invention discloses an integrated forward osmosis membrane assembly structure, and particularly relates to the technical field of membrane separation, the integrated forward osmosis membrane assembly structure comprises a forward osmosis membrane box and a membrane support framework, the forward osmosis membrane box comprises an end cover, an integrated assembly box, a reinforcing side plate and a bottom cover, the integrated assembly box is hermetically connected below the end cover, and the reinforcing side plate is connected below the integrated assembly box. The two sides of the integrated assembly box are fixedly connected with reinforcing side plates, the bottom of the integrated assembly box is in sealed connection with a bottom cover, and the forward osmosis membrane box is a sealed container formed by combining a plurality of components. Meanwhile, the flow guide ribs in the membrane supporting frame and the separation net have a synergistic effect, a uniform fluid channel can be formed on the surface of the membrane, so that a raw material solution and an absorbing solution can stably and uniformly flow through the membrane surface, the concentration polarization phenomenon caused by local flow velocity sudden change or turbulent flow is avoided, and the mass transfer process is more stable; and a double-sealing structure of a sealing clamping groove and a positioning bolt between the end cover and the integrated assembly box can effectively prevent leakage of the feed liquid and guarantee the stability of long-term operation of the assembly.

Description

Technical Field

[0001] This application relates to the field of membrane separation technology, and more specifically, to an integrated forward osmosis membrane module structure. Background Technology

[0002] Forward osmosis membrane modules are the core components of forward osmosis technology. They are devices that use the natural osmotic pressure difference as a driving force to allow water molecules to spontaneously pass through a selective semi-permeable membrane from the low osmotic pressure side (feed liquid side) to the high osmotic pressure side (draw liquid side). Existing publication number CN113905807B discloses a forward osmosis membrane and a forward osmosis treatment system; a forward osmosis membrane is characterized in that a thin film layer with semi-permeable membrane properties is laminated on a polyketide support layer. In the process of developing this application, the inventors discovered the following problems with the prior art: Existing forward osmosis membrane modules mostly adopt a split design, with the membrane, support plate, flow guide mesh, and shell being fabricated and assembled separately. This results in problems such as large assembly gaps, easy membrane misalignment, and low mass transfer efficiency. Furthermore, the simple sealing structure of traditional modules makes them prone to feed leakage, and membrane replacement is cumbersome, leading to high maintenance costs. In addition, the split-structure fluid channel design is often inefficient, easily causing concentration polarization and reducing the efficiency of the forward osmosis process. Therefore, an integrated forward osmosis membrane module structure is proposed to address the above problems. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, this application provides an integrated forward osmosis membrane module structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this application provides the following technical solution: an integrated forward osmosis membrane module structure, including a forward osmosis membrane box and a membrane support frame. The forward osmosis membrane box includes an end cap, an integrated assembly box, reinforcing side plates, and a bottom cap. The integrated assembly box is sealed and connected to the bottom of the end cap. The reinforcing side plates are fixedly connected to both sides of the integrated assembly box. The bottom cap is sealed and connected to the bottom of the integrated assembly box. The forward osmosis membrane box is a sealed container composed of multiple components, and its main body is the integrated assembly box. The membrane support frame is placed inside the integrated assembly box. The membrane support frame is equipped with a flow guiding mesh group. The membrane support frame is placed in the central area inside the integrated assembly box and constitutes the core functional component of the membrane module. This section serves as the general outline of the technical solution, clarifying the overall structure of the integrated forward osmosis membrane module, defining the core components and sealing container attributes of the forward osmosis membrane box, and building an overall framework for the detailed description of each component in the following sections.

[0005] Preferably, the structure of the membrane support frame is disassembled in detail to explain how it forms a stable support structure with the first assembly bracket and the main channel diversion plate, providing an installation foundation for the flow guide mesh group and reserving gaps for fluid flow. The membrane support frame includes a first assembly bracket and a main channel diversion plate. The main channel diversion plate is installed at the edges of the two sets of first assembly brackets. Several sets of flow guide mesh groups are equidistantly arranged along the two sets of first assembly brackets. A gap for water to pass through is left between each pair of flow guide mesh groups. The frame is mainly composed of two sets of parallel and opposite first assembly brackets. The edges of the two sets of brackets are connected and fixed by the main channel diversion plate, forming a stable rectangular frame structure that provides a solid support foundation for the subsequent installation of the flow guide mesh group.

[0006] Preferably, the fluid channel division rules are defined, and the gaps are divided into two independent channels by odd and even arrays to achieve complete isolation and guidance of the raw material liquid and the extract liquid, avoid mixing of different fluids, and ensure the orderliness of the separation process. The gaps reserved in several groups of the guide mesh are divided into odd arrays and even arrays, where the odd array is the first fluid entry channel and the even array is the second fluid entry channel.

[0007] Preferably, the fluid inlet and outlet paths and the flow-guiding auxiliary structure are clearly defined. The fluid is centrally distributed and collected through the manifold body, and the flow-guiding ribs further regulate the flow field, making the fluid distribution on the membrane surface more uniform and improving the mass transfer efficiency. The first fluid inlet channel and the second fluid inlet channel are respectively connected to the inlet manifold body and the outlet manifold body. The top of the inlet manifold body connected to the first fluid inlet channel is connected to the feed liquid channel, and the top of the inlet manifold body connected to the second fluid inlet channel is connected to the suction liquid channel. Flow-guiding ribs are provided on both sides of the first fluid inlet channel and the second fluid inlet channel.

[0008] Preferably, the sealing and fastening design of the membrane box is described. The sealing groove improves the sealing performance between the end cap and the integrated assembly box from a structural perspective, while the positioning bolts enhance the connection rigidity. This double protection prevents fluid leakage and improves the overall stability of the component. A sealing groove is provided between the end cap and the integrated assembly box, and positioning bolts are provided through both ends of the end cap. The positioning bolts are equidistantly arranged.

[0009] Preferably, the integrated assembly box features an auxiliary positioning and detachable design, with detachable structures for the positioning posts and positioning bolts. This facilitates the assembly, disassembly, and subsequent maintenance of the components, improving the maintainability of the equipment. Positioning posts are provided on both sides of the integrated assembly box, and the two ends of the positioning posts and the positioning bolts constitute a detachable structure.

[0010] Preferably, the formation and function of the partition cavity are explained. The buffer space is enclosed by the positioning column and the extension column to provide a transition area for the fluid, avoid local turbulence or sudden changes in flow velocity, and improve the stability of the component operation. The partition cavity is reserved on both sides of the membrane support frame inside the integrated assembly box. The partition cavity is connected to the extension column at the edge of the positioning column.

[0011] Preferably, an assembly locking strip is fixedly connected to the edge of the first assembly bracket, and the flow guide mesh group and the assembly locking strip are slidably connected. This describes the installation method of the flow guide mesh group. The sliding connection design makes the installation, disassembly and replacement of the flow guide mesh group more convenient, without disassembling the entire membrane box, which greatly simplifies the maintenance process.

[0012] Preferably, the flow guiding mesh assembly includes a fixing plate, a forward osmosis membrane body, a spacer, and connecting strips. Four sets of fixing plates are provided, with the forward osmosis membrane body positioned at the center of each of the four sets of fixing plates. Spacers are placed at both ends of the forward osmosis membrane body. Connecting strips are fixedly connected to both sides of the fixing plates. Disassembling the internal structure of the flow guiding mesh assembly clarifies the function of each component: the fixing plate supports the membrane body, the spacer prevents the membrane from deforming under pressure, and the connecting strips provide a structural basis for splicing the mesh assembly.

[0013] Preferably, the connecting strip has a locking groove on one side of the fixed plate, and a connecting protrusion on the side of the connecting strip away from the locking groove. Anti-detachment grooves are reserved on both the upper and lower sides of the connecting protrusion. This describes the connection and anti-detachment structure of the connecting strip. The locking groove and the connecting protrusion achieve a stable splicing of the mesh group. The anti-detachment groove further enhances the connection reliability and prevents the mesh group from shifting or falling off during operation.

[0014] The technical effects and advantages of this application are as follows: 1. Compared with existing technologies, this integrated forward osmosis membrane module structure features an integrated structural design where the membrane support frame is embedded in the integrated assembly box of the forward osmosis membrane tank. The connection between the positioning posts and sealing grooves reduces the gaps in separate assemblies, ensuring the membrane is always in the preset position, thus significantly improving the utilization rate of the effective permeate area. Simultaneously, the flow-guiding ribs and the partition mesh within the membrane support frame work together to form a uniform fluid channel on the membrane surface, allowing the feed liquid and draw liquid to flow smoothly and evenly across the membrane surface. This avoids concentration polarization caused by sudden changes in local flow velocity or turbulence, making the mass transfer process more stable. Furthermore, the double sealing structure of the sealing groove and positioning bolts between the end cap and the integrated assembly box effectively prevents feed leakage, ensuring the long-term stability of the module's operation.

[0015] 2. Compared with existing technologies, this integrated forward osmosis membrane module structure adopts a modular design. The flow guiding mesh group is installed with the assembly locking strip through a sliding connection. At the same time, the locking groove and docking protrusion structure of the docking strip not only ensures the stability of the mesh group connection, but also makes the installation, disassembly and replacement of the membrane more convenient. When the membrane needs to be replaced, the maintenance personnel only need to slide the flow guiding mesh group along the assembly locking strip to complete the disassembly of the old membrane and the installation of the new membrane, without disassembling the entire membrane box, which greatly shortens the maintenance time. In addition, the positioning posts and positioning bolts on both sides of the integrated assembly box adopt a detachable structure, which further simplifies the assembly and disassembly process of the membrane box. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a first-view structural schematic diagram of the membrane support frame of this application; Figure 3 This is a second-view structural schematic diagram of the membrane support frame of this application; Figure 4 This is a structural schematic diagram of the fixing plate in this application; Figure 5 A schematic diagram of the membrane support frame of this application without the flow guiding mesh assembly; Figure 6 This is a schematic diagram of the flow guide mesh assembly of this application; Figure 7 For the purposes of this application Figure 6 Schematic diagram of the structure at point A; Figure 8 This is a first-view structural diagram of the guide mesh assembly of this application; Figure 9 This is a schematic diagram of the second-view structure of the flow guide mesh assembly in this application; Figure 10 This is a third-view structural diagram of the flow guide mesh assembly in this application; Figure 11 This is a fourth-view structural diagram of the flow guide mesh assembly of this application.

[0017] The attached diagram is labeled as follows: 1. Forward osmosis membrane box; 2. End cap; 201. Sealing groove; 3. Positioning bolt; 4. Integrated assembly box; 5. Reinforcing side plate; 6. Bottom cover; 7. Positioning column; 8. Feed liquid flow channel; 9. Draw liquid flow channel; 10. Membrane support frame; 11. Extension column; 12. Separating cavity; 13. First assembly bracket; 14. Main channel diversion plate; 15. Flow guiding mesh assembly; 16. Assembly locking strip; 17. First fluid inlet channel; 18. Second fluid inlet channel; 19. Inlet manifold body; 20. Outlet manifold body; 21. Fixing plate; 22. Forward osmosis membrane body; 23. Spacing mesh; 24. Connecting strip; 2401. Locking groove; 2402. Connecting protrusion; 2403. Anti-detachment groove; 25. Flow guiding rib. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] Example As attached Figures 1 to 11 The diagram illustrates an integrated forward osmosis membrane module structure, comprising a forward osmosis membrane chamber 1 and a membrane support frame 10. The membrane chamber 1 includes an end cap 2, an integrated assembly box 4, reinforcing side plates 5, and a bottom cover 6. The integrated assembly box 4 is sealed to the bottom of the end cap 2, ensuring the airtightness of the internal space of the membrane chamber. Reinforcing side plates 5 are fixedly connected to both sides of the integrated assembly box 4 to further enhance the structural strength of the entire membrane chamber, enabling it to adapt to different installation and operating environments. The bottom of the integrated assembly box 4 is sealed with a bottom cover 6, and the top of the integrated assembly box 4 is sealed with the end cover 2 through a sealing groove 201 structure and is fastened with evenly distributed positioning bolts 3 to ensure the sealing performance and overall rigidity of the connection. The bottom of the integrated assembly box 4 is sealed with the bottom cover 6, together forming a complete box. At the same time, the top of the integrated assembly box 4 is sealed with the end cover 2 through a sealing groove 201 structure and is fastened with evenly distributed positioning bolts 3, which not only ensures the sealing effect of the connection but also improves the overall structural rigidity of the membrane box. The membrane support frame 10 is placed inside the integrated assembly box 4. The membrane support frame 10 is equipped with a flow guiding mesh group 15. The membrane support frame 10 is placed in the internal cavity of the integrated assembly box 4 and is the core structure for the component to realize fluid flow guidance and membrane support.

[0020] In a preferred embodiment, the membrane support frame 10 includes a first assembly bracket 13 and a main channel diversion plate 14. The main channel diversion plate 14 is installed at the edges of the two sets of first assembly brackets 13 respectively. Several sets of guide mesh groups 15 are equidistantly arranged along the two sets of first assembly brackets 13. A gap is left between each two sets of guide mesh groups 15 for water to pass through. The membrane support frame 10 is mainly composed of two sets of parallel and opposite first assembly brackets 13. Their edges are connected and fixed by the main channel diversion plate 14 to form a stable rectangular frame structure. Several sets of guide mesh groups 15 are equidistantly installed between the two sets of first assembly brackets 13 along their length direction. A specific gap is reserved between each two adjacent sets of guide mesh groups 15. These gaps are the channels through which the feed liquid and the extract liquid flow through the membrane surface.

[0021] In a preferred embodiment, the gaps reserved in the several groups of guide mesh assemblies 15 are divided into odd-numbered groups and even-numbered groups. The odd-numbered groups are the first fluid inlet channel 17, and the even-numbered groups are the second fluid inlet channel 18. In order to achieve independent guidance of the raw material liquid and the extracting liquid, the gaps between the several groups of guide mesh assemblies 15 are divided into two types of channels: odd-numbered groups and even-numbered groups. The odd-numbered gaps constitute the first fluid inlet channel 17, and the even-numbered gaps constitute the second fluid inlet channel 18. The two types of channels are independent of each other, which can prevent different fluids from mixing during the transmission process.

[0022] In a preferred embodiment, the first fluid inlet channel 17 and the second fluid inlet channel 18 are respectively connected to an inlet manifold body 19 and an outlet manifold body 20 at their ends. The inlet manifold body 19 and the outlet manifold body 20 are connected to the ends of the first fluid inlet channel 17 and the second fluid inlet channel 18, respectively, for centralized distribution and collection of fluid. A feed channel 8 is connected to the top of the inlet manifold body 19 connected to the first fluid inlet channel 17, and a feed channel 8 is connected to the top of the inlet manifold body 19 connected to the second fluid inlet channel 18. There is a liquid intake channel 9, wherein the top end of the liquid intake manifold body 19 connected to the first fluid intake channel 17 is connected to the feed liquid channel 8 for introducing raw material liquid; the top end of the liquid intake manifold body 19 connected to the second fluid intake channel 18 is connected to the liquid intake channel 9 for introducing liquid intake. Both sides of the first fluid intake channel 17 and the second fluid intake channel 18 are provided with flow guide ribs 25. At the same time, the flow guide ribs 25 can further regulate the flow path of the fluid, so that the fluid is more evenly distributed in the channel and improve the mass transfer efficiency.

[0023] In a preferred embodiment, a sealing groove 201 is provided between the end cap 2 and the integrated assembly box 4. The sealing groove 201 structure can significantly improve the sealing performance of the connection between the two and prevent fluid leakage from the connection. Positioning bolts 3 are provided through both ends of the end cap 2. The positioning bolts 3 are equidistant and evenly distributed, which can further strengthen the connection strength between the end cap 2 and the integrated assembly box 4 and ensure structural stability. In addition, positioning posts 7 are provided on both sides of the integrated assembly box 4. The two ends of the positioning posts 7 and the positioning bolts 3 form a detachable connection structure. This design facilitates the assembly and subsequent disassembly and maintenance of the membrane box.

[0024] As a preferred embodiment, positioning posts 7 are provided on both sides of the integrated assembly box 4, and the two ends of the positioning posts 7 and the positioning bolts 3 form a detachable structure.

[0025] In a preferred embodiment, the interior of the integrated assembly box 4 has pre-reserved partition cavities 12 on both sides of the membrane support frame 10. Each partition cavity 12 is connected to an extension column 11 at the edge of the positioning column 7. Inside the integrated assembly box 4, positioning columns 7 and extension columns 11 are provided for positioning and partitioning. Together, they form independent partition cavities 12 on the inner wall areas on both sides of the membrane box. The main function of these partition cavities 12 is to provide buffer and transition space for the operation of the equipment.

[0026] In a preferred embodiment, an assembly locking strip 16 is fixedly connected to the edge of the first assembly bracket 13, and the flow guide mesh group 15 and the assembly locking strip 16 are slidably connected. The flow guide mesh group 15 and the assembly locking strip 16 are connected in a sliding manner. This design makes the installation, disassembly and replacement of the flow guide mesh group 15 more convenient and can effectively simplify the later maintenance process.

[0027] In a preferred embodiment, the flow guiding mesh assembly 15 includes a fixing plate 21, a forward osmosis membrane body 22, a spacer 23, and a connecting strip 24. The flow guiding mesh assembly 15 itself includes four sets of fixing plates 21. The forward osmosis membrane body 22 is disposed in the central area of ​​the four sets of fixing plates 21. There are four sets of fixing plates 21. The forward osmosis membrane body 22 is disposed in the center of the four sets of fixing plates 21. Spacers 23 are placed at both ends of the forward osmosis membrane body 22. The spacers 23 can support the membrane and prevent the membrane from deforming under fluid pressure, while ensuring that the fluid can pass through the surface of the membrane. Connecting strips 24 are fixedly connected to both sides of the fixing plates 21.

[0028] In a preferred embodiment, the connecting strip 24 is provided with a locking groove 2401 on one side of the fixing plate 21, and a connecting protrusion 2402 is provided on the side of the connecting strip 24 away from the locking groove 2401. Anti-detachment grooves 2403 are reserved on both the upper and lower sides of the connecting protrusion 2402. When multiple sets of flow guiding mesh groups 15 are assembled, the connecting protrusions 2402 of adjacent mesh groups can be embedded into the locking grooves 2401 of another set. The anti-detachment grooves 2403 can enhance the stability of the connection, prevent the mesh groups from falling off or shifting during operation, and ensure the stability of the overall structure of the flow guiding mesh group 15.

[0029] The working process of this application is as follows: First, the integrated forward osmosis membrane module takes the forward osmosis separation effect as its core. A closed cavity is formed by the end cap 2 of the forward osmosis membrane tank 1, the integrated assembly box 4, and the bottom cap 6. The structural rigidity and fluid buffering capacity are enhanced by the reinforcing side plate 5, the positioning column 7, and the extension column 11, providing a stable operating environment for the internal membrane support frame 10. The feed liquid and the draw liquid enter the inlet manifold body 19 through the feed liquid channel 8 and the draw liquid channel 9, respectively, and are distributed to the mutually isolated first fluid inlet channel 17 and second fluid inlet channel 18 within the membrane support frame 10. The guide ribs 25 set on both sides of the membrane ensure that the fluid is evenly distributed on both sides of the membrane. Driven by the osmotic pressure difference, water molecules in the feed solution achieve selective permeation separation through the forward osmosis membrane body 22. The separator 23 supports the membrane to prevent deformation and ensure stable mass transfer. After mass transfer, the fluid is collected and discharged through the outlet manifold body 20. At the same time, the sliding assembly locking strip 16 and the docking strip 24 with anti-detachment structure ensure that the guide mesh assembly 15 is installed firmly and is easy to maintain. The double sealing design of the sealing groove 201 and the positioning bolt 3 effectively prevents fluid leakage. The above is the working principle of this integrated forward osmosis membrane module structure.

Claims

1. An integrated forward osmosis membrane module structure, comprising a forward osmosis membrane box (1) and a membrane support frame (10), characterized in that: The forward osmosis membrane box (1) includes an end cap (2), an integrated assembly box (4), a reinforcing side plate (5) and a bottom cover (6). The integrated assembly box (4) is sealed and connected to the bottom of the end cap (2). The reinforcing side plate (5) is fixedly connected to both sides of the integrated assembly box (4). The bottom cover (6) is sealed and connected to the bottom of the integrated assembly box (4). The membrane support frame (10) is placed inside the integrated assembly box (4), and the membrane support frame (10) is provided with a flow guide mesh group (15).

2. The integrated forward osmosis membrane module structure according to claim 1, characterized in that: The membrane support frame (10) includes a first assembly bracket (13) and a main channel diversion plate (14). The main channel diversion plate (14) is installed at the edges of the two sets of first assembly brackets (13). The guide mesh group (15) is arranged in several groups at equal intervals along the two sets of first assembly brackets (13). A gap for water to pass through is left between each two sets of guide mesh group (15).

3. The integrated forward osmosis membrane module structure according to claim 1, characterized in that: The gaps reserved in several groups of the flow guide mesh (15) are divided into odd number groups and even number groups, where the odd number group is the first fluid inlet channel (17); and the even number group is the second fluid inlet channel (18).

4. The integrated forward osmosis membrane module structure according to claim 3, characterized in that: The first fluid inlet channel (17) and the second fluid inlet channel (18) are respectively connected to the inlet manifold body (19) and the outlet manifold body (20). The top end of the inlet manifold body (19) connected to the first fluid inlet channel (17) is connected to the feed liquid channel (8). The top end of the inlet manifold body (19) connected to the second fluid inlet channel (18) is connected to the suction liquid channel (9). Guide ribs (25) are provided on both sides of the first fluid inlet channel (17) and the second fluid inlet channel (18).

5. The integrated forward osmosis membrane module structure according to claim 1, characterized in that: A sealing groove (201) is provided between the end cap (2) and the integrated assembly box (4), and positioning bolts (3) are provided through both ends of the end cap (2), and the positioning bolts (3) are equidistantly arranged.

6. The integrated forward osmosis membrane module structure according to claim 5, characterized in that: The integrated assembly box (4) is provided with positioning posts (7) on both sides, and the two ends of the positioning posts (7) and the positioning bolts (3) form a detachable structure.

7. The integrated forward osmosis membrane module structure according to claim 1, characterized in that: The integrated assembly box (4) has a partition cavity (12) reserved on both sides of the membrane support frame (10) inside. The partition cavity (12) is connected to an extension column (11) at the edge of the positioning column (7).

8. The integrated forward osmosis membrane module structure according to claim 2, characterized in that: An assembly locking strip (16) is fixedly connected to the edge of the first assembly bracket (13), and the guide mesh group (15) and the assembly locking strip (16) are slidably connected.

9. The integrated forward osmosis membrane module structure according to claim 1, characterized in that: The flow guiding mesh group (15) includes a fixing plate (21), a forward osmosis membrane body (22), a separator (23), and a connecting strip (24). The fixing plate (21) is provided in four sets, and the forward osmosis membrane body (22) is provided at the center of the four sets of fixing plates (21). The separator (23) is placed at both ends of the forward osmosis membrane body (22), and the connecting strip (24) is fixedly connected to both sides of the fixing plate (21).

10. The integrated forward osmosis membrane module structure according to claim 9, characterized in that: The docking strip (24) is provided with a locking groove (2401) on one side of the fixing plate (21), and a docking protrusion (2402) is provided on the side of the docking strip (2401) away from the locking groove (2401). Anti-detachment grooves (2403) are reserved on both the upper and lower sides of the docking protrusion (2402).

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