Integrated desalting device and method based on graphene flat sheet membrane

Abstract

The invention belongs to the technical field of graphene desalination, particularly relates to an integrated desalination device and method based on a graphene flat sheet membrane, and aims at solving the problems that an existing supporting frame is not firm in fixation, poor in membrane pollution prevention and control effect and serious in concentration polarization phenomenon. A clamping mechanism is arranged in the shell and used for fixing the porous supporting frame, the device is provided with a vibrating mechanism, the vibrating mechanism drives the porous supporting frame to do micro-amplitude reciprocating motion through magnetic repulsive force and assists pollutant stripping during backwashing, a water storage tank is arranged on one side of the device, and a pulse mechanism is arranged on a water inlet path of the water storage tank. Pulse water flow is formed through intermittent closed water inflow and injected into the shell, raw water flowing through the graphene separation layer generates turbulent flow, the device can effectively slow down accumulation of salt and pollutants on the surface of the membrane, and the stability of the desalination process and the cleaning efficiency of the membrane are improved.

Description

Technical Field

[0001] This invention relates to the field of graphene desalination technology, and in particular to an integrated desalination device and method based on graphene flat sheet membrane. Background Technology

[0002] Graphene flat sheet membranes are widely used in water treatment fields such as seawater desalination and brackish water desalination due to their excellent separation performance, high permeation flux, and good chemical stability. Desalination devices based on graphene flat sheet membranes typically achieve raw water desalination by fixing the graphene separation layer to a support frame, assembling the support frame into a shell, and utilizing the membrane separation principle.

[0003] Existing desalination devices based on graphene flat sheet membranes have many limitations in practical applications: 1. The assembly and fixing method of the support frame and the shell is unreasonable. Most devices only use clamping or bolt fixing in one direction. During the assembly process, the support frame is prone to uneven stress, which in turn causes the graphene separation layer to deform and affects the separation accuracy. At the same time, the positioning effect of the fixing structure on the support frame is not good. Under the impact of water flow or the vibration of device operation, the support frame is prone to displacement, which causes the graphene separation layer to be misaligned with the flow channel and reduces the desalination efficiency. 2. During long-term operation, the graphene separation layer is prone to trapping pollutants and salts on the membrane surface, forming a concentration polarization layer. This not only reduces the membrane's permeation flux but also accelerates the membrane's fouling aging and shortens its service life. Existing backwashing structures mostly use a single reverse water flow for rinsing, which has limited effect on removing pollutants that are tightly attached to the membrane surface. Furthermore, it is impossible to achieve auxiliary vibration of the graphene separation layer during the rinsing process, and pollutants are easy to remain on the membrane surface. 3. The raw water injection process is mostly a steady-state flow. The water flow forms a stable boundary layer on the membrane surface. The retained salt ions tend to accumulate on the membrane surface to form a high-concentration layer, which further aggravates the concentration polarization phenomenon and leads to a continuous decline in the membrane's separation performance. 4. The existing equipment's various functional mechanisms are independent of each other, and functions such as backwashing and water flow regulation cannot be coordinated and linked. The overall operation of the equipment is not smooth, the energy consumption is high, and the moving parts lack effective protective structures, making them easily worn by impurities in the raw water, which affects the operational stability and service life of the equipment. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing support frames, such as insecure fixation, poor membrane fouling control, and severe concentration polarization, by proposing an integrated desalination device and method based on graphene flat sheet membranes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An integrated desalination device based on a graphene flat sheet membrane includes a housing and a porous support frame disposed within the housing. A graphene separation layer is installed within the porous support frame. Guide rod I and guide rod II are fixed within the housing. The porous support frame is mounted on a support plate slidably connected to guide rod I via a clamping mechanism. A water storage tank is provided on one side of the housing, and the water storage tank is connected to a water injection pipe. A pulse mechanism driven by motor I is provided inside the water storage tank. The pulse mechanism includes a closed gate that cooperates with the water injection pipe, which is used to intermittently cut off the water inlet to form pulse turbulence inside the housing. The housing is also provided with a vibration mechanism driven by motor II. The vibration mechanism includes a rotating rod and rotating disk I and rotating disk II fixed thereon. The two sides of the bearing plate cooperate with the rotating disk I and rotating disk II through alternating magnetic repulsion forces to drive the bearing plate and the porous support frame to reciprocate along the guide rod I. The top of the housing is equipped with a backwashing tank, which is connected to the water production channel of the graphene separation layer through a hose and a manifold. The backwashing tank is equipped with a piston plate III. The transmission shaft of the pulse mechanism is equipped with a sector gear, which engages with a rack that can be linked with the piston plate III. When the sealing gate closes the water inlet, the sector gear drives the piston plate III to move downward, pushing the fresh water in the backwashing tank back into the graphene separation layer for rinsing.

[0006] In one possible design, the clamping mechanism includes L-shaped plates fixed to both ends of the bearing plate and a clamping seat fixed to the top of the L-shaped plates. The clamping seat is slidably connected to the outer wall of the guide rod II. The clamping seat has a sliding groove and a transverse groove. A piston plate I is connected to the sliding groove through a threaded rod, and the piston plate I has a sealing retaining ring in the sliding groove. The threaded rod is rotatably connected to the piston plate I. A piston plate II is slidably connected in a sealing manner in the transverse groove. A trapezoidal clamping block is fixedly connected to one side of the piston plate II. Trapezoidal grooves are provided on both sides of the porous support frame. Rotating the threaded rod drives the piston plate I to compress gas, which pushes the trapezoidal clamping block into the trapezoidal groove. The inclined surface cooperation generates a horizontal clamping force and a vertical downward pressing force on the porous support frame.

[0007] In one possible design, a pin is fixed to the top of the support plate, and a pin hole is provided at the bottom of the porous support frame to engage with the pin.

[0008] In one possible design, multiple magnets I are fixed on the side of the rotating disk I facing the support plate, and multiple magnets III are fixed on the side of the rotating disk II facing the support plate. Multiple magnets II are embedded on both sides of the support plate. Both magnets I and magnets III generate repulsive forces with magnets II, and magnets III are staggered with magnets I, so that when the rotating rod rotates, magnets I and magnets III alternately align with magnets II.

[0009] In one possible design, the pulse mechanism further includes a vertical rod fixed to the top of the closed gate, the top of the vertical rod extending in a sealed sliding manner to the top of the water storage tank and fixed with a lifting plate; a guide rod III is fixed to the bottom of the lifting plate, the bottom end of the guide rod III extending in a sealed manner into the water storage tank and fixed with a float plate; a spring I is provided between the lifting plate and the top of the water storage tank; a rotating shaft is driven by a motor I, and a shaped cam that cooperates with the lifting plate is fixed on the rotating shaft.

[0010] In one possible design, a pressure rod is connected to the top of the piston plate III, a pressure plate is fixed to the top of the pressure rod, and a spring II is provided between the pressure plate and the top of the backwash box; an electromagnet is provided at the bottom of the pressure plate; and a magnet IV is provided at the top of the rack that magnetically engages with the electromagnet.

[0011] In one possible design, a guide rod is fixedly connected to one side of the rack, the guide rod slides through the fixed seat, and a spring III is sleeved on the guide rod.

[0012] In one possible design, the bottom of the housing is fixed with a liquid injection network, which is connected to the water storage tank via a connecting pipe I; the top ends of the plurality of manifolds are connected to the hose via a connecting pipe II; the backwash tank is connected to a water production pipe, and a one-way valve is provided inside the water production pipe.

[0013] In one possible design, the outer walls of guide rod I, guide rod II, and rotating rod are all fitted with bellows covers, and a control panel is fixed to one side of the housing. The control panel is electrically connected to the electromagnet, motor I, and motor II.

[0014] A method of using an integrated desalination device based on a graphene flat sheet membrane includes the following steps: S1. Before use, place the porous support frame with the graphene separation layer inside the housing, and insert the pin into the pin hole to position the porous support frame. Then, rotate the threaded rod to drive the piston plate I to move down and squeeze the inert gas in the sliding groove. The inert gas enters the horizontal groove and pushes the trapezoidal clamping block to extend into the trapezoidal groove. The inclined surface of the trapezoidal clamping block and the inclined surface of the trapezoidal groove cooperate to generate a horizontal clamping force on the porous support frame, while generating a vertical downward thrust, so that the porous support frame is tightly attached to the top of the bearing plate, completing the vertical and horizontal clamping force of the porous support frame. After installation, close the housing. S2. The external booster pump outlet is connected to the water injection pipe. Raw water is injected into the shell through the water storage tank, connecting pipe I and the liquid injection network. The raw water enters the flow channel in the graphene separation layer through the pores on the porous support frame. The raw water is filtered by the graphene separation layer. The filtered fresh water is transported to the outside through the manifold, connecting pipe II, hose and backwash box by the product water pipe, completing the collection of fresh water. The filtered concentrated brine in the shell is discharged from the brine pipe on one side of the shell, completing the desalination of the raw water. S3. When the booster pump injects raw water into the housing, the motor I is driven to rotate via the control panel. The motor I drives the shaped cam to rotate via the rotating shaft. The protruding part of the shaped cam pushes the lifting plate and the closing gate to move down, and the spring I is compressed. The closing gate then closes the water injection pipe. When the protruding part of the shaped cam disengages from the lifting plate, the lifting plate moves up and resets under the elastic force of the spring I. As the shaped cam rotates, it can intermittently control the closing of the water injection pipe by the closing gate, forming a pulse flow. This can create periodic fluctuations in pressure and water flow. This unsteady flow can effectively disrupt the stable boundary layer, causing the raw water in the housing to form turbulence. This allows the raw water to also form turbulence in the flow channel within the graphene separation layer, preventing the trapped salt ions from accumulating into a high-concentration layer on the membrane surface and affecting the service life of the graphene separation layer. S4. To prevent a high concentration of salt layer from adhering to the inner membrane surface of the graphene separation layer for an extended period, an electromagnet is activated via the control panel. The electromagnet generates magnetic attraction on magnet IV, connecting the pressure plate and rack. When the rotating shaft drives the shaped cam to rotate, the protruding part of the shaped cam drives the lifting plate and the closing gate to move downwards and close the water injection pipe. Simultaneously, the rotating shaft drives the sector gear to rotate. The teeth on the outer wall of the sector gear mesh with the rack, driving the rack and pressure plate downwards as a whole, compressing spring II. The pressure plate, through the pressure rod, drives piston plate III downwards. Because a one-way valve is installed in the product water pipe, the filter in the backwash box is flushed during the downward movement of piston plate III. After the fresh water is re-injected into the graphene separation layer, the protruding part of the irregular cam releases the push on the lifting plate, and the closing gate moves upward and resets under the elastic force of spring I. The teeth of the sector gear disengage from the rack, and the rack and piston plate III move upward and reset under the elastic force of spring III and spring II. Therefore, as the irregular cam and sector gear rotate, the closing gate can close the water injection pipe, and the piston plate III intermittently injects fresh water into the graphene separation layer in the reverse direction, forming an intermittent reverse pulse. This flushes the pollutants and salts loosened on the inner surface of the graphene separation layer back into the fluid in the flow channel, so that the graphene separation layer can continue to carry out desalination operations. S5. Additionally, when a large amount of dirt accumulates on the membrane surface within the graphene separation layer and requires cleaning, clean water is injected back into the graphene separation layer through the water production pipe for backwashing. During backwashing, motor II is driven by the control panel. Motor II rotates via a rotating rod, which in turn drives rotating disks I and II to rotate. Multiple magnets I on one side of rotating disk I and multiple magnets III on one side of rotating disk II generate repulsive forces with multiple magnets II on both sides of the support plate. Therefore, when magnet I repels the corresponding magnet II, magnet III is misaligned with the corresponding magnet II. At this time, the repulsive force can drive the support plate and the porous support frame as a whole to move towards rotating disk II. Conversely, when magnet III aligns with the corresponding magnet II, it can drive the support plate and the porous support frame as a whole to move towards rotating disk I. This allows the porous support frame to undergo in-situ micro-amplitude high-frequency physical vibration, assisting in backwashing to remove contaminants and improving cleaning efficiency.

[0015] Beneficial effects: In this invention, the clamping mechanism achieves the initial positioning of the porous support frame through the insertion and engagement of the pin rod and the pin hole, preventing the porous support frame from horizontally displacing on the bearing plate. The rotating threaded rod drives the piston plate I to compress the inert gas, pushing the piston plate II to drive the trapezoidal clamping block into the trapezoidal groove. The trapezoidal clamping block and the inclined surface of the trapezoidal groove cooperate to generate a horizontal clamping force and a vertical downward thrust, so that the porous support frame is tightly attached to the top of the bearing plate, achieving bidirectional clamping and fixing. This fixing method makes the porous support frame uniformly stressed, avoiding deformation of the graphene separation layer due to uneven stress, and preventing displacement of the porous support frame during device operation, ensuring accurate alignment of the graphene separation layer and the flow channel, and maintaining stable separation accuracy. In this invention, the vibration mechanism uses the repulsive force between magnets to drive the carrier plate to move back and forth, eliminating the need for mechanical contact transmission, reducing component wear, and lowering maintenance costs. By controlling the speed of motor II, the vibration frequency and amplitude of the carrier plate can be adjusted to meet the cleaning needs of graphene separation layers with different levels of contamination. The micro-amplitude high-frequency vibration can effectively peel off the tightly attached contaminants on the membrane surface. Combined with backwash water flow, it can improve the cleaning effect, reduce contaminant residue, and slow down the membrane fouling process. In this invention, the pulse mechanism, through the cooperation of the irregular cam, spring I, and float plate, drives the closed gate to intermittently close the water injection pipe, so that the raw water forms a pulse flow. The pulse flow creates periodic fluctuations in pressure and water flow, which disrupts the stable boundary layer and causes the raw water to form turbulence in the flow channel within the graphene separation layer. The turbulence mixes the high-concentration brine on the membrane surface with the low-concentration feed water in the mainstream through strong radial mixing, maintaining a low salt concentration on the membrane surface, alleviating concentration polarization, maintaining a stable permeation driving force, and extending the service life of the graphene separation layer. In this invention, while the irregularly shaped cam drives the closed gate to close the water injection pipe, the sector gear drives the piston plate III to move down to achieve reverse flushing. When the water injection pipe resumes water intake, the reverse flushing stops, so that the reverse flushing and the raw water pulse injection are carried out synchronously. The reverse pulse flushing water flow and the vibration of the vibration mechanism work together to form a dual cleaning effect, effectively removing pollutants and salts from the membrane surface, further improving cleaning efficiency, and ensuring the continuous and stable separation performance of the graphene separation layer.

[0016] In this invention, the synergistic effect of pulse flow and vibration mechanism effectively improves desalination efficiency, prevents the accumulation of salt ions on the membrane surface, and extends the service life of the membrane. At the same time, the backwashing box realizes intermittent reverse pulses, further improving cleaning efficiency and ensuring the continuous operation of desalination. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an integrated desalination device based on a graphene flat sheet membrane provided by the present invention. Figure 2 This is a three-dimensional cross-sectional view of an integrated desalination device based on a graphene flat sheet membrane provided by the present invention. Figure 3 A three-dimensional exploded structural diagram of the porous support frame and liquid injection pipeline of an integrated desalination device based on a graphene flat sheet membrane provided by the present invention. Figure 4 A three-dimensional exploded view of the porous support frame and connecting pipe II of an integrated desalination device based on a graphene flat sheet membrane provided by the present invention. Figure 5A three-dimensional structural diagram of an integrated desalination device based on a graphene flat sheet membrane provided by the present invention, comprising an L-shaped plate, a pin, and a clamping seat. Figure 6 A three-dimensional cross-sectional view of the clamping structure of an integrated desalination device based on a graphene flat film provided by the present invention. Figure 7 A three-dimensional exploded cross-sectional view of the support plate, rotating disk I, and rotating disk II of an integrated desalination device based on graphene flat film provided by the present invention. Figure 8 A three-dimensional cross-sectional view of the protective box and water storage tank of an integrated desalination device based on a graphene flat sheet membrane provided by the present invention. Figure 9 A three-dimensional structural schematic diagram of the irregularly shaped cam, lifting plate, and sealing gate of an integrated desalination device based on graphene flat sheet membrane provided by the present invention. Figure 10 A three-dimensional exploded structural diagram of the rack, sector gear, and spring Ⅲ of an integrated desalination device based on a graphene flat film provided by the present invention; Figure 11 This is a three-dimensional cross-sectional view of the backwashing tank of an integrated desalination device based on a graphene flat sheet membrane provided by the present invention.

[0018] In the diagram: 1. Shell; 2. Porous support frame; 3. Graphene separation layer; 4. Liquid injection network; 5. Connecting pipe I; 6. Guide rod I; 7. Bearing plate; 8. L-shaped plate; 9. Guide rod II; 10. Clamping seat; 11. Pin; 12. Pin hole; 13. Trapezoidal groove; 14. Sliding groove; 15. Threaded rod; 16. Piston plate I; 17. Horizontal groove; 18. Piston plate II; 19. Trapezoidal clamping block; 20. Rotating rod; 21. Rotating disk I; 22. Magnet I; 23. Magnet II; 24. Rotating disk II; 25. Magnet III; 26. Rubber ring; 27. Water storage tank; 28. Water injection pipe; 29. 30. Closed gate; 31. Vertical rod; 32. Lifting plate; 33. Guide rod III; 34. Spring I; 35. Float plate; 36. L-shaped guide rail; 37. Protective box; 38. Motor I; 39. Rotating shaft; 40. Irregular cam; 41. Connecting pipe II; 42. Manifold; 43. Hose; 44. Backwash box; 45. Piston plate III; 46. Pressure rod; 47. Pressure plate; 48. Spring II; 49. Water production pipe; 50. Rack; 51. Electromagnet; 52. Magnet IV; 53. Guide rod; 54. Fixed seat; 55. Spring III; 56. Sector gear; 57. Motor II; 58. Bellows cover I. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] In one embodiment: Refer to Figures 1-3 An integrated desalination device based on graphene flat sheet membrane is disclosed, relating to the field of graphene desalination technology. It mainly includes a shell 1, which is composed of a box and a cover plate. Inside the shell 1, two guide rods I6 and two guide rods II9 are fixed, which are arranged in parallel. A porous support frame 2 is located between these guide rods. Inside the porous support frame 2, a graphene separation layer 3 is fixedly installed. The graphene separation layer 3 is a flat sheet membrane structure.

[0021] Furthermore, referring to Figures 3-5 The housing 1 is equipped with two sets of clamping mechanisms. The clamping mechanisms are used to clamp the porous support frame 2 inside the housing 1. Each set of clamping mechanisms includes a bearing plate 7 and two L-shaped plates 8. The bearing plate 7 is slidably sleeved on the outer wall of the two guide rods I 6. The two L-shaped plates 8 are respectively fixed at both ends of the bearing plate 7. A clamping seat 10 is fixed at the top of each L-shaped plate 8. The clamping seat 10 is slidably sleeved on the outer wall of the guide rod II 9. The porous support frame 2 is placed on the top of the two bearing plates 7. Multiple pins 11 are fixed on the top of the bearing plates 7. Multiple pin holes 12 are provided at the bottom of the porous support frame 2. The pins 11 are inserted into the pin holes 12. This kind of engagement can perform preliminary positioning of the porous support frame 2.

[0022] Furthermore, referring to Figures 4-6 The clamping seat 10 has a sliding groove 14 inside. A transverse groove 17 is provided on the inner wall of the sliding groove 14 near the porous support frame 2. A piston plate I 16 is slidably connected within the sliding groove 14, located above the transverse groove 17. A threaded rod 15 is rotatably connected to the top of the piston plate I 16 via a bearing. The threaded tip of the threaded rod 15 extends to the top of the clamping seat 10. Rotating the threaded rod 15 drives the piston plate I 16 to move up and down within the sliding groove 14. A piston plate II 18 is slidably connected within the transverse groove 17. A trapezoidal clamping block 19 is fixed on one side of the porous support frame 2. O-rings are provided between piston plate I 16 and sliding groove 14, and between piston plate II 18 and transverse groove 17 to ensure the long-term sealing of the gas cavity. Trapezoidal grooves 13 are provided on both sides of the porous support frame 2. The shape of the trapezoidal groove 13 matches the trapezoidal clamping block 19. The inclined surface of the trapezoidal clamping block 19 cooperates with the inclined surface of the trapezoidal groove 13. When the trapezoidal clamping block 19 extends into the trapezoidal groove 13, the interaction of the inclined surfaces will generate a component force perpendicular to the clamping direction.

[0023] Specifically, when installing the porous support frame 2, it is first placed on the bearing plate 7, and the pin 11 is inserted into the pin hole 12. Then, the threaded rod 15 on each clamping seat 10 is rotated in sequence. The threaded rod 15 is screwed downward, pushing the piston plate I 16 downward. The sliding groove 14 is pre-filled with inert gas. The downward movement of the piston plate I 16 will squeeze the gas and make it enter the transverse groove 17. The gas pressure pushes the piston plate II 18 to move towards the porous support frame 2. The piston plate II 18 drives the trapezoidal clamping block 19 to extend into the trapezoidal groove 13 on the side of the porous support frame 2. The inclined surface of the trapezoidal clamping block 19 contacts and presses against the inclined surface of the trapezoidal groove 13. During this process, the inclined surface generates a horizontal clamping force and also generates a vertical downward component force. This component force forces the porous support frame 2 to fit more tightly against the surface of the bearing plate 7. Through the combined action of the two sets of clamping mechanisms, the porous support frame 2 is firmly fixed in both the horizontal and vertical directions.

[0024] Furthermore, referring to Figures 1-4 A liquid injection network 4 is fixed to the bottom inner wall of the shell 1. Multiple evenly distributed liquid outlets are provided at the top of the liquid injection network 4. A connecting pipe I5 is fixedly connected to one side of the liquid injection network 4. A water storage tank 27 is fixed to the outside of the shell 1, located on one side of the shell 1. One end of the connecting pipe I5 extends fixedly into the interior of the water storage tank 27. A water injection pipe 28 is fixedly connected to the side of the water storage tank 27 away from the shell 1. The end of the water injection pipe 28 away from the water storage tank 27 is used to connect to the outlet of an external booster pump. Multiple manifolds 41 are fixedly passed through the top of the porous support frame 2. The number of manifolds 41 is determined according to the number of water production channels in the graphene separation layer 3. The bottom ends are all fixedly extended into the water production channel inside the graphene separation layer 3. The top ends of multiple manifolds 41 are fixedly connected to the same connecting pipe II 40. The top of the connecting pipe II 40 is fixedly connected to a hose 42. The hose 42 is made of flexible pressure-resistant material. The top of the shell 1 is fixedly fixedly fixedly fixedly fixedly fixedly fixedly fixedly fixedly fixedly fixedly fixedly fixedly connectedly to the bottom of the backwashing tank 43. The side of the backwashing tank 43 away from the hose 42 is fixedly connected to a water production pipe 48. A one-way valve is installed inside the water production pipe 48. The one-way valve only allows fluid to flow out from the backwashing tank 43 to the outside. A brine pipe is also fixedly fixedly fixedly fixedly on one side of the shell 1. The brine pipe is used to discharge concentrated brine.

[0025] Specifically, during device operation, an external booster pump injects raw water into the storage tank 27 through the water injection pipe 28. The raw water then enters the internal cavity of the shell 1 through the connecting pipe I 5 and the liquid injection network 4. The multiple outlets on the liquid injection network 4 help the raw water to be evenly distributed within the shell 1. Under pressure, the raw water passes through the pores on the porous support frame 2 and enters the inlet channel within the graphene separation layer 3. Under pressure, water molecules in the raw water in the channel pass through the graphene separation layer 3 and enter the product water channel, while salt is retained. The filtered fresh water is collected in the product water channel and discharged through the manifold 41. The fresh water enters the backwash tank 43 for temporary storage through the connecting pipe II 40 and the hose 42. Finally, the fresh water is transported to the external collection system through the one-way valve on the product water pipe 48 to complete the collection of fresh water. The concentrated water with retained salt remains in the cavity of the shell 1, and its concentration gradually increases. Finally, it is discharged through the brine pipe on the side of the shell 1, completing the desalination operation.

[0026] Furthermore, referring to Figure 2 , Figure 3 , Figure 5 and Figure 7 The housing 1 is equipped with a vibration mechanism, which drives the porous support frame 2 to reciprocate via the bearing plate 7. The vibration mechanism includes a rotating rod 20, which is rotatably connected to the inner wall of the housing 1 via bearings. The rotating rod 20 is located between two bearing plates 7. Rotating disks I 21 and II 24 are fixedly sleeved on the outer wall of the rotating rod 20. Rotating disks I 21 and II 24 are located on both sides of the bearing plate 7. Multiple magnets II 23 are fixedly embedded on both sides of the bearing plate 7. The magnets II 23 are arranged in a ring with equal spacing around the rotating rod 20. Multiple magnets I 22 are fixed on the side of rotating disk I 21 closest to the bearing plate 7, and multiple magnets III 25 are fixed on the side of rotating disk II 24 closest to the bearing plate 7. 2. The outer surfaces of magnets II23 and III25 are coated with a corrosion-resistant coating such as epoxy resin coating, or encapsulated in a sealed corrosion-resistant housing. Magnets I22 and III25 are also arranged in a ring at equal intervals with the rotating rod 20 as the center. The arrangement positions of magnets I22 and III25 are staggered. The polarities of the opposite faces of magnets I22 and II23 are the same, and the polarities of the opposite faces of magnets III25 and II23 are also the same. Therefore, magnets I22 and II23 generate repulsive forces, and magnets III25 and II23 also generate repulsive forces. Motor II56 is fixed on one side of the outer wall of housing 1 by a frame. The output shaft of motor II56 extends into housing 1 through a sealed bearing and is fixedly connected to one end of the rotating rod 20 by a coupling.

[0027] Specifically, after motor II56 starts, it drives rotating rod 20 to rotate. Rotating rod 20 drives rotating disk I21 and rotating disk II24 to rotate synchronously. When a magnet I22 on rotating disk I21 rotates to be directly opposite a magnet II23 on bearing plate 7, the magnetic repulsion between them pushes bearing plate 7 away from rotating disk I21. At this time, magnet III25 on rotating disk II24 and magnet II23 on bearing plate 7 are misaligned, and the effect on the movement of bearing plate 7 is small. As rotating rod 20 continues to rotate, magnet I22 is misaligned, and the magnetic repulsion between them pushes bearing plate 7 away from rotating disk I21. When magnet III 25 rotates to a position directly opposite magnet II 23, the repulsive force between magnet III 25 and magnet II 23 pushes the support plate 7 to move away from the rotating disk II 24. Since magnet I 22 and magnet III 25 are alternately aligned with magnet II 23, during the continuous rotation of the rotating rod 20, the support plate 7 will drive the porous support frame 2 and graphene separation layer 3 on it to move back and forth along the axial direction of the guide rod I 6 at a high frequency and with a small amplitude. This vibration acts on the backwashing stage and can help peel off the contaminants attached to the surface of the graphene separation layer 3 membrane.

[0028] Furthermore, referring to Figure 7 Rubber rings 26 are fixed to the edges of rotating disks I 21 and II 24 that are close to each other. Rubber rings 26 are also fixed to both sides of the bearing plate 7. The function of the rubber rings 26 is to prevent the bearing plate 7 from rigidly colliding with the rotating disks when it moves back and forth under magnetic drive.

[0029] Furthermore, referring to Figure 2 , Figure 3 and Figure 5 The outer walls of rotating rod 20, guide rod I6, and guide rod II9 are all fitted with bellows covers. Bellows cover I57, fitted on the outer walls of rotating rod 20 and guide rod I6, is fixed at one end to the inner wall of housing 1 and at the other end to bearing plate 7. Bellows cover I57, fitted on the outer wall of guide rod II9, is fixed at one end to the inner wall of housing 1 and at the other end to clamping seat 10. In the area between the two bearing plates 7, bellows cover II, fitted on the outer walls of rotating rod 20 and guide rod I6, is also fixed. Bellows cover III, fitted on the outer walls of guide rod II9, is also fixed between two adjacent clamping seats 10. Bellows cover I57, bellows cover II, and bellows cover III have the same structure and are all corrosion-resistant sealing structures that can prevent salt water inside housing 1 from entering the sliding parts, thus playing a protective and sealing role.

[0030] Furthermore, referring to Figure 2 and Figures 8-10The water storage tank 27 is equipped with a pulse mechanism for intermittently controlling the connection between the water injection pipe 28 and the water storage tank 27. The pulse mechanism includes a sealing gate 29, which is slidably connected to the inner wall of one side of the water storage tank 27. The position of the sealing gate 29 corresponds to the outlet of the water injection pipe 28. A vertical rod 30 is fixed to the top of the sealing gate 29. The top of the vertical rod 30 extends slidably to the top of the water storage tank 27 through a sealing element and is fixed to a lifting plate 31. Guide rods III 32 are fixed to both sides of the bottom of the lifting plate 31. The bottom ends of the two guide rods III 32 extend slidably into the water storage tank 27 through a sealing element and are fixed to a float plate 34. The float plate 34 is slidably connected to the inner wall of the water storage tank 27. The bottom of the lifting plate 31 is connected to the top of the water storage tank 27. Three springs I33 are fixed between the vertical rod 30 and the two guide rods III32. In the natural state, the elastic force of the springs I33 and the buoyancy of the float 34 work together to make the lifting plate 31 be in the upper limit position. At this time, the closing gate 29 opens the water inlet 28. The top of the water storage tank 27 is fixed with a protective box 36. The inner wall of one side of the protective box 36 is fixed with a motor I37 through a frame. The output shaft of the motor I37 is fixed with a rotating shaft 38 through a coupling. One end of the rotating shaft 38 is rotatably connected to the outer wall of the housing 1 through a bearing. A special-shaped cam 39 is fixedly sleeved on the outer wall of the rotating shaft 38. The profile of the special-shaped cam 39 has a protruding part, which matches the top surface of the lifting plate 31.

[0031] Specifically, after motor I 37 starts, it drives the rotating shaft 38 and the irregular cam 39 to rotate. When the protrusion of the irregular cam 39 rotates to contact the lifting plate 31, it will press down on the lifting plate 31. The lifting plate 31 drives the vertical rod 30 and the guide rod III 32 to move down. The guide rod III 32 pushes the float 34 to move down against buoyancy. The spring I 33 is compressed. The vertical rod 30 drives the closing gate 29 to move down until it completely closes the outlet of the water injection pipe 28, blocking the injection of raw water. When the irregular cam 39 continues to rotate and its protrusion disengages from the lifting plate 31, the downward pressure applied to the lifting plate 31 disappears. At this time, the compressed spring I 33... Spring I 33 releases its elastic force, pushing the lifting plate 31 to move upward and reset. At the same time, the raw water in the water storage tank 27 generates buoyancy on the float plate 34, and the auxiliary guide rod III 32 and the lifting plate 31 move upward. The lifting plate 31 drives the closing gate 29 to move upward through the vertical rod 30, reopening the water injection pipe 28 and restoring the injection of raw water. As the irregular cam 39 rotates continuously, the closing gate 29 periodically opens and closes the water injection pipe 28. This periodic opening and closing, under the condition of continuous water supply from the external booster pump, causes the pressure of the raw water flowing into the shell 1 to fluctuate periodically, forming a pulse flow. The pulse flow can disrupt the stable fluid boundary layer on the membrane surface.

[0032] Furthermore, referring to Figure 8 and Figure 9Two L-shaped guide rails 35 are fixed on one inner wall of the water storage tank 27. The two L-shaped guide rails 35 are located on both sides of the closed gate 29. The two sides of the closed gate 29 are slidably connected to the L-shaped guide rails 35. The L-shaped guide rails 35 guide the up and down movement of the closed gate 29, making its movement smoother and more stable.

[0033] Both Motor I37 and Motor II56 are waterproof and moisture-proof motors. A sealing ring is installed at the connection between the motor housing and the mounting base, and the motor wiring ports are sealed with waterproof connectors.

[0034] A control panel is fixed to one side of the housing 1. The control panel is electrically connected to electromagnet 50, motor I 37, and motor II 56. The control panel contains a microcontroller, such as a PLC or a single-chip microcomputer, with a pre-programmed control program. During normal desalination operation, the control program controls motor I 37 to run at a set speed to generate pulsed water flow. When online or enhanced cleaning is required, the control program first activates electromagnet 50 to attract magnet IV 51, and then synchronously or sequentially activates motor I 37 and motor II 56, so that reverse pulse rinsing and frame vibration are coordinated. After the cleaning cycle is completed, the control program shuts down motor II 56 and electromagnet 50, and the device returns to normal desalination mode.

[0035] In another embodiment: Refer to Figure 2 , Figure 8 , Figure 10 and Figure 11Inside the backwash box 43, a piston plate III 44 is slidably connected in a sealed manner. A pressure rod 45 is fixed to the top of the piston plate III 44, and a pressure plate 46 is fixed to the top of the pressure rod 45. A spring II 47 is fixed between the bottom of the pressure plate 46 and the top of the backwash box 43. The spring II 47 is sleeved on the outer wall of the pressure rod 45. An electromagnet 50 is fixed to the bottom of one side of the pressure plate 46. A rack 49 is slidably connected to one side of the housing 1. A magnet IV 51 is fixed to the top of the rack 49. The magnet IV 51 is made of ferromagnetic material. When the electromagnet 50 is energized, it generates a magnetic field and attracts the magnet IV 51. A sector gear 55 is also fixedly sleeved on the outer wall of the rotating shaft 38. The sector gear 55 has a section of arc surface with teeth. The sector gear 55 is positioned corresponding to the rack 49, and the installation phase of the sector gear 55 is aligned with that of the irregular cam 39. Correspondingly, when the protrusion of the irregular cam 39 begins to press the lifting plate 31, causing the closing gate 29 to move downward, the toothed portion of the sector gear 55 begins to mesh with the rack 49. When the protrusion of the irregular cam 39 disengages from the lifting plate 31, causing the closing gate 29 to move upward and reset, the toothed portion of the sector gear 55 just disengages from the rack 49. A guide rod 52 is fixed to one side of the rack 49 via a base plate, and a fixing seat 53 is fixed to one side of the inner wall of the water storage tank 27. The bottom end of the guide rod 52 slides through the fixing seat 53. A spring Ⅲ 54 is sleeved on the outer wall of the guide rod 52. The bottom end of the spring Ⅲ 54 is fixedly connected to the top of the fixing seat 53, and the top end of the spring Ⅲ 54 is fixedly connected to the boss on the outer wall of the guide rod 52. In its natural state, the elastic force of the spring Ⅲ 54 keeps the guide rod 52 and the rack 49 in the upper limit position.

[0036] Specifically, when backwashing is required, the external raw water supply is first stopped, and the concentrated brine in the housing 1 is drained. Then, the electromagnet 50 is energized, generating magnetic force that attracts the magnet IV 51 below. This connects the pressure plate 46 and the rack 49 into a synchronously moving unit. The motor I 37 is then started, driving the rotating shaft 38, the shaped cam 39, and the sector gear 55 to rotate synchronously. When the shaped cam 39 pushes the lifting plate 31 and the closing gate 29 down to close the water injection pipe 2... Simultaneously, the teeth of sector gear 55 mesh with rack 49, driving rack 49 to move downwards. Rack 49, connected to magnet IV 51 via electromagnet 50, drives pressure plate 46 to move downwards. Pressure plate 46, via pressure rod 45, pushes piston plate III 44 in backwash tank 43 downwards. Because a one-way valve is installed in product water pipe 48, fresh water cannot flow out from there. Therefore, when piston plate III 44 moves downwards, it forces the fresh water temporarily stored in backwash tank 43 into graphite through hose 42, connecting pipe II 40, and manifold 41. In the production channel of graphene separation layer 3, fresh water permeates backward or washes the membrane surface, flushing loose contaminants attached to the membrane surface back into the flow channel of shell 1. At this time, motor II 56 also starts synchronously, driving the vibration mechanism to work, causing the porous support frame 2 to generate high-frequency micro-amplitude vibration. The vibration acts on graphene separation layer 3, which helps to further loosen and peel off stubborn contaminants. The contaminants flushed down can be discharged from the brine pipe along with a small amount of water. When the protrusion of the irregular cam 39 turns, the closing gate 29 moves upward and opens. When the water inlet 28 is in, the sector gear 55 also disengages from the rack 49, and the rack 49 loses its downward pushing force. Under the elastic force of the spring Ⅲ 54, the guide rod 52 drives the rack 49 to move upward and reset quickly. At the same time, the pressure plate 46 also drives the piston plate Ⅲ 44 to move upward and reset under the elastic force of the spring Ⅱ 47. Negative pressure is generated in the backwash box 43 to prepare for the next collection of fresh water. The electromagnet 50 is de-energized after the backwash process is completed. The pulsed backwash water flow combined with mechanical vibration improves the cleaning effect.

[0037] A method of using an integrated desalination device based on a graphene flat sheet membrane includes the following steps: S1. Before use, place the porous support frame 2 with the graphene separation layer 3 installed inside the housing 1, and insert the pin 11 into the pin hole 12 to position the porous support frame 2. Then, rotate the threaded rod 15 to drive the piston plate I 16 to move down and squeeze the inert gas in the sliding groove 14. The inert gas enters the horizontal groove 17 and pushes the trapezoidal clamping block 19 to extend into the trapezoidal groove 13. The inclined surface of the trapezoidal clamping block 19 cooperates with the inclined surface of the trapezoidal groove 13 to generate a horizontal clamping force on the porous support frame 2, while generating a vertical downward thrust, so that the porous support frame 2 is tightly attached to the top of the bearing plate 7, thus completing the vertical and horizontal clamping force of the porous support frame 2. After installation, close the housing 1. S2. The external booster pump outlet is connected to the water injection pipe 28. Raw water is injected into the shell 1 through the water storage tank 27, connecting pipe I 5 and liquid injection network 4. The raw water enters the flow channel in the graphene separation layer 3 through the pores on the porous support frame 2. The raw water is filtered by the graphene separation layer 3. The filtered fresh water is transported to the outside through the water production pipe 48 through the manifold 41, connecting pipe II 40, hose 42 and backwash box 43, completing the collection of fresh water. The filtered concentrated brine in the shell 1 is discharged from the brine pipe on one side of the shell 1, completing the desalination of the raw water. S3. When the booster pump injects raw water into the housing 1, the motor I37 is driven to rotate via the control panel. The motor I37 drives the shaped cam 39 to rotate via the rotating shaft 38. The protruding part of the shaped cam 39 pushes the lifting plate 31 and the closing gate 29 downward, compressing the spring I33. The closing gate 29 then closes the water injection pipe 28. When the protruding part of the shaped cam 39 disengages from the lifting plate 31, the lifting plate 31 moves upward and resets under the elastic force of the spring I33. Thus, with the rotation of the shaped cam 39, the closing gate 29 can be intermittently controlled to close the water injection pipe 28. The closure of 8 forms a pulse flow, which can create periodic fluctuations in pressure and water flow. This unsteady flow can effectively disrupt the stable boundary layer, causing the raw water in the shell 1 to form turbulence. This allows the raw water to also form turbulence in the flow channels within the graphene separation layer 3, preventing the trapped salt ions from accumulating into a high-concentration layer on the membrane surface (turbulence, through strong radial mixing, can continuously mix the high-concentration brine on the membrane surface with the low-concentration feed water in the mainstream, maintaining a low salt concentration on the membrane surface, thereby maintaining high permeation driving force), thus affecting the service life of the graphene separation layer 3. S4. To prevent a high concentration of salt layer from adhering to the inner membrane surface of the graphene separation layer 3 for an extended period, an electromagnet 50 is activated via the control panel. The electromagnet 50 generates a magnetic attraction force on the magnet IV 51, connecting the pressure plate 46 to the rack 49. When the rotating shaft 38 drives the shaped cam 39 to rotate, and the protrusion of the shaped cam 39 drives the lifting plate 31 and the closing gate 29 to move down into the closed water injection pipe 28, the rotating shaft 38 simultaneously drives the sector gear 55 to rotate. The teeth on the outer wall of the sector gear 55 mesh with the rack 49, driving the rack 49 and the pressure plate 46 to move down as a whole, compressing the spring II 47. The pressure plate 46 drives the piston plate III 44 to move down via the pressure rod 45. Since a one-way valve is installed in the water production pipe 48, backflow will occur during the downward movement of the piston plate III 44. The filtered fresh water in the washing tank 43 is re-injected into the graphene separation layer 3. After the protrusion of the irregular cam 39 releases its push on the lifting plate 31, the closing gate 29 moves upward and resets under the elastic force of spring I 33. The teeth of the sector gear 55 disengage from the rack 49. The rack 49 and piston plate III 44 move upward and reset under the elastic force of spring III 54 and spring II 47. Therefore, as the irregular cam 39 and sector gear 55 rotate, the closing gate 29 can close the water injection pipe 28, causing the piston plate III 44 to intermittently inject fresh water into the graphene separation layer 3 in the reverse direction, forming an intermittent reverse pulse. This flushes the pollutants and salts loosened from the inner membrane surface of the graphene separation layer 3 back into the fluid in the flow channel, allowing the graphene separation layer 3 to continue desalination operations. S5. Additionally, when a large amount of dirt accumulates on the membrane surface within the graphene separation layer 3 and requires cleaning, clean water is injected into the graphene separation layer 3 in the reverse direction through the water production pipe 48 for backwashing. During backwashing, the motor II 56 is driven to run via the control panel. The motor II 56 rotates via the rotating rod 20, which in turn drives the rotating disks I 21 and II 24 to rotate. Multiple magnets I 22 on one side of rotating disk I 21 and multiple magnets III 25 on one side of rotating disk II 24 generate repulsive forces with multiple magnets II 23 on both sides of the support plate 7. Therefore, when magnet I 22 generates repulsive forces with the corresponding magnet II 23, magnet III 25 is misaligned with the corresponding magnet II 23. At this time, the repulsive force can drive the support plate 7 and the porous support frame 2 to move towards the rotating disk II 24. Conversely, when magnet III 25 is aligned with the corresponding magnet II 23, it can drive the support plate 7 and the porous support frame 2 to move towards the rotating disk I 21. This allows the porous support frame 2 to undergo in-situ micro-amplitude high-frequency physical vibration, assisting in backwashing to remove contaminants and improving cleaning efficiency.

[0038] Maintenance of this device: 1. Every 100 hours of operation, the clamping seat 10 needs to be disassembled, the salt impurities in the sliding groove 14 and the transverse groove 17 need to be cleaned, and the threaded rod 15 needs to be coated with salt-resistant grease. 2. Check the integrity of the bellows cover every 200 hours of operation. Replace it immediately if any damage is found. 3. Every 500 hours of operation, check the fixing status and magnetic pole performance of the permanent magnet. If it becomes loose or the magnetic deterioration occurs, it needs to be re-fixed or replaced. 4. Regularly check the sealing performance of the sealing rings and waterproof joints, and replace them in time if they show signs of aging.

[0039] However, as is well known to those skilled in the art, the working principles and wiring methods of electromagnet 50, motor I 37 and motor II 56 are all conventional methods or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0040] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An integrated desalination device based on a graphene flat sheet membrane, comprising a housing (1) and a porous support frame (2) disposed within the housing (1), wherein a graphene separation layer (3) is installed within the porous support frame (2), characterized in that, The housing (1) is fixed with guide rod I (6) and guide rod II (9), and the porous support frame (2) is mounted on the bearing plate (7) that is slidably connected to the guide rod I (6) by a clamping mechanism; A water storage tank (27) is provided on one side of the housing (1). The water storage tank (27) is connected to a water injection pipe (28). A pulse mechanism driven by a motor I (37) is provided inside the water storage tank (27). The pulse mechanism includes a closed gate (29) that cooperates with the water injection pipe (28) for intermittently cutting off the water inlet to form pulse turbulence inside the housing (1). The housing (1) is also provided with a vibration mechanism driven by motor II (56). The vibration mechanism includes a rotating rod (20) and rotating disk I (21) and rotating disk II (24) fixed thereon. The two sides of the bearing plate (7) cooperate with the rotating disk I (21) and rotating disk II (24) through alternating magnetic repulsion forces to drive the bearing plate (7) and the porous support frame (2) to reciprocate along the guide rod I (6). The top of the housing (1) is provided with a backwash box (43), which is connected to the water production channel of the graphene separation layer (3) through a hose (42) and a manifold (41). The backwash box (43) is provided with a piston plate III (44). The transmission shaft of the pulse mechanism is provided with a sector gear (55). The sector gear (55) is engaged with a rack (49) that can be linked with the piston plate III (44). When the closing gate (29) closes the water inlet, the sector gear (55) drives the piston plate III (44) to move down, and pushes the fresh water in the backwash box (43) back into the graphene separation layer (3) for rinsing.

2. The integrated desalination device based on a graphene flat sheet membrane according to claim 1, characterized in that, The clamping mechanism includes an L-shaped plate (8) fixed at both ends of the bearing plate (7) and a clamping seat (10) fixed at the top of the L-shaped plate (8). The clamping seat (10) is slidably connected to the outer wall of the guide rod II (9). The clamping seat (10) is provided with a sliding groove (14) and a transverse groove (17). The piston plate I (16) is connected to the sliding groove (14) by a threaded rod (15), and the sealing ring of the piston plate I (16) is in the sliding groove (14). The threaded rod (15) is rotatably connected to the piston plate I (16). The piston plate II (18) is slidably connected in the transverse groove (17). A trapezoidal clamping block (19) is fixedly connected to one side of the piston plate II (18). The porous support frame (2) is provided with trapezoidal grooves (13) on both sides. Rotating the threaded rod (15) drives the piston plate I (16) to compress the gas, which can push the trapezoidal clamping block (19) into the trapezoidal groove (13), and use the inclined surface to generate a horizontal clamping force and a vertical downward pressing force on the porous support frame (2).

3. The integrated desalination device based on a graphene flat sheet membrane according to claim 2, characterized in that, The top of the bearing plate (7) is fixed with a pin (11), and the bottom of the porous support frame (2) is provided with a pin hole (12) that is inserted and engaged with the pin (11).

4. The integrated desalination device based on a graphene flat sheet membrane according to claim 3, characterized in that, Multiple magnets I (22) are fixed on the side of the rotating disk I (21) facing the support plate (7), and multiple magnets III (25) are fixed on the side of the rotating disk II (24) facing the support plate (7). Multiple magnets II (23) are embedded on both sides of the support plate (7). Both magnets I (22) and magnets III (25) generate repulsive force with magnets II (23), and magnets III (25) are staggered with magnets I (22), so that when the rotating rod (20) rotates, magnets I (22) and magnets III (25) alternately align with magnets II (23).

5. The integrated desalination device based on a graphene flat sheet membrane according to claim 4, characterized in that, The pulse mechanism also includes a vertical rod (30) fixed to the top of the closed gate (29), the top of the vertical rod (30) extends in a sealed sliding manner to the top of the water storage tank (27) and is fixed with a lifting plate (31); a guide rod III (32) is fixed at the bottom of the lifting plate (31), the bottom end of the guide rod III (32) extends in a sealed manner into the water storage tank (27) and is fixed with a float plate (34); a spring I (33) is provided between the lifting plate (31) and the top of the water storage tank (27); the motor I (37) drives and connects to a rotating shaft (38), and a special-shaped cam (39) that cooperates with the lifting plate (31) is fixed on the rotating shaft (38).

6. The integrated desalination device based on a graphene flat sheet membrane according to claim 5, characterized in that, The piston plate III (44) is connected to a pressure rod (45) at the top. A pressure plate (46) is fixed at the top of the pressure rod (45). A spring II (47) is provided between the pressure plate (46) and the top of the backwash box (43). An electromagnet (50) is provided at the bottom of the pressure plate (46). A magnet IV (51) is provided at the top of the rack (49) and magnetically engages with the electromagnet (50).

7. The integrated desalination device based on a graphene flat sheet membrane according to claim 6, characterized in that, A guide rod (52) is fixedly connected to one side of the rack (49), the guide rod (52) slides through the fixed seat (53), and a spring III (54) is sleeved on the guide rod (52).

8. An integrated desalination device based on a graphene flat sheet membrane according to claim 7, characterized in that, The bottom of the housing (1) is fixed with a liquid injection network (4), which is connected to the water storage tank (27) through a connecting pipe I (5); the top ends of the multiple manifolds (41) are connected to the hose (42) through a connecting pipe II (40); the backwash box (43) is connected to a water production pipe (48), which is equipped with a one-way valve.

9. An integrated desalination device based on a graphene flat sheet membrane according to claim 8, characterized in that, The outer walls of the guide rod I (6), guide rod II (9) and rotating rod (20) are all fitted with bellows covers. A control panel is fixed on one side of the housing (1). The control panel is electrically connected to the electromagnet (50), motor I (37) and motor II (56).

10. A method of using an integrated desalination device based on a graphene flat sheet membrane, applied to the integrated desalination device based on a graphene flat sheet membrane as described in claim 9, characterized in that... Includes the following steps: S1. Before use, place the porous support frame (2) with the graphene separation layer (3) inside the housing (1), and insert the pin (11) into the pin hole (12) to position the porous support frame (2). Then rotate the threaded rod (15) to drive the piston plate I (16) to move down and squeeze the inert gas in the sliding groove (14). The inert gas enters the horizontal groove (17) and pushes the trapezoidal clamping block (19) to extend into the trapezoidal groove (13). The inclined surface of the trapezoidal clamping block (19) and the inclined surface of the trapezoidal groove (13) cooperate to generate a horizontal clamping force on the porous support frame (2) and generate a vertical downward thrust, so that the porous support frame (2) is tightly attached to the top of the bearing plate (7) to complete the vertical and horizontal clamping force of the porous support frame (2). After installation, close the housing (1). S2. The external booster pump outlet is connected to the water injection pipe (28). Raw water is injected into the shell (1) through the water storage tank (27), connecting pipe I (5) and liquid injection network (4). The raw water enters the flow channel in the graphene separation layer (3) through the pores on the porous support frame (2). The raw water is filtered through the graphene separation layer (3). The filtered fresh water is transported to the outside through the water production pipe (48) via the manifold (41), connecting pipe II (40), hose (42), and backwash box (43) to complete the collection of fresh water. The concentrated brine filtered in the shell (1) is discharged from the brine pipe on one side of the shell (1) to complete the desalination of the raw water. S3. When the booster pump injects raw water into the housing (1), the motor I (37) is driven to rotate through the control panel. The motor I (37) drives the shaped cam (39) to rotate through the rotating shaft (38). The protruding part of the shaped cam (39) pushes the lifting plate (31) and the closing gate (29) to move down. The spring I (33) is compressed, and the closing gate (29) closes the water injection pipe (28). When the protruding part of the shaped cam (39) disengages from the lifting plate (31), the lifting plate (31) is compressed by the spring I (33). Under the action of elasticity, it moves up and resets, and then with the rotation of the irregular cam (39), it can intermittently control the closure of the gate (29) to the water injection pipe (28), forming a pulse flow, which can create periodic fluctuations in pressure and water flow. This unsteady flow can effectively destroy the stable boundary layer, making the raw water in the shell (1) form turbulence, so that the raw water can also form turbulence in the flow channel in the graphene separation layer (3), preventing the trapped salt ions from accumulating into a high-concentration layer on the membrane surface and affecting the service life of the graphene separation layer (3); S4. To avoid the long-term adhesion of a high-concentration salt layer on the inner membrane surface of the graphene separation layer (3), the electromagnet (50) is activated by the control panel. The electromagnet (50) generates a magnetic attraction force on the magnet IV (51), which can connect the pressure plate (46) and the rack (49). When the rotating shaft (38) drives the shaped cam (39) to rotate, the protrusion of the shaped cam (39) drives the lifting plate (31) and the closing gate (29) to move down into the closed water injection pipe (28). At the same time, the rotating shaft (38) drives the sector gear (55) to rotate. The teeth on the outer wall of the sector gear (55) mesh with the rack (49) to drive the rack (49) and the pressure plate (46) to move down as a whole, and compress the spring II (47). The pressure plate (46) drives the piston plate III (44) to move down through the pressure rod (45). Since a one-way valve is installed in the water production pipe (48), during the process of the piston plate III (44) moving down, The filtered fresh water in the backwash box (43) is re-injected into the graphene separation layer (3). After the protrusion of the shaped cam (39) releases the push on the lifting plate (31), the closing gate (29) moves up and resets under the elastic force of spring I (33). The teeth of the sector gear (55) disengage from the rack (49). The rack (49) and piston plate III (44) move up and reset under the elastic force of spring III (54) and spring II (47). Therefore, as the shaped cam (39) and sector gear (55) rotate, the closing gate (29) can close the water injection pipe (28), and the piston plate III (44) intermittently injects fresh water into the graphene separation layer (3) in reverse, forming an intermittent reverse pulse. This flushes the pollutants and salts loosened from the inner membrane surface of the graphene separation layer (3) back into the fluid in the flow channel, so that the graphene separation layer (3) can continue to carry out desalination operations. S5. Additionally, when a large amount of dirt accumulates on the membrane surface within the graphene separation layer (3) and cleaning is required, clean water is injected into the graphene separation layer (3) through the water production pipe (48) for backwashing. During backwashing, the motor II (56) is driven to run through the control panel. The motor II (56) rotates through the rotating rod (20), which in turn drives the rotating disk I (21) and rotating disk II (24) to rotate. Multiple magnets I (22) on one side of rotating disk I (21) and multiple magnets III (25) on one side of rotating disk II (24) respectively interact with multiple magnets II (23) on both sides of the support plate (7) to produce... When magnet I (22) and the corresponding magnet II (23) generate a repulsive force, magnet III (25) and the corresponding magnet II (23) are misaligned. At this time, the repulsive force can drive the bearing plate (7) and the porous support frame (2) to move as a whole towards the rotating disk II (24). Conversely, when magnet III (25) and the corresponding magnet II (23) are aligned, they can drive the bearing plate (7) and the porous support frame (2) to move as a whole towards the rotating disk I (21). This allows the porous support frame (2) to undergo micro-amplitude high-frequency physical vibration in situ, assisting in backwashing to remove contaminants and improving cleaning efficiency.

Images