A high-flux reverse osmosis filtration composite membrane structure and a preparation method thereof

Abstract

The application relates to the technical field of reverse osmosis structures, in particular to a high-flux reverse osmosis filtering composite membrane structure and a preparation method thereof, which comprises a center pipe, water inlet holes one in communication with the outer walls on both sides are formed in the center pipe, a membrane bag is fixedly connected to one side of the outer wall of the center pipe at the water inlet holes one, and the membrane bag is placed in a back-to-back mode by two rectangular reverse osmosis membrane sheets, so that an active separation layer faces outward. By adding a buffer pad on the contact surface of the water production grid and the membrane bag, the direct action of pressure pulsation on the reverse osmosis membrane sheet is avoided, micro-deformation or rupture of the reverse osmosis membrane sheet is avoided, the reverse osmosis membrane sheet always maintains a relatively flat and stable form, the normal separation performance of the reverse osmosis membrane sheet is maintained, the direct impact of pressure on the reverse osmosis membrane sheet is effectively reduced, the risk of rupture of the reverse osmosis membrane sheet is reduced, the service life of the reverse osmosis membrane sheet is prolonged, and the equipment repair and replacement cost caused by damage of the reverse osmosis membrane sheet is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of reverse osmosis structure, and particularly relates to a high-flux reverse osmosis filtration composite membrane structure and a preparation method thereof. BACKGROUND

[0002] The high-flux reverse osmosis filtration composite membrane structure is a multi-layer thin film material specially designed for efficient water treatment, and its core feature is to build an ultra-thin and dense separation layer on a microporous support layer to achieve efficient interception of salt and small pollutants in water at a lower operating pressure, while maintaining a water flux significantly higher than that of traditional reverse osmosis membranes. Its typical preparation method mainly includes interfacial polymerization: first, a porous polysulfone or polyether sulfone support base film is prepared, then it is immersed in a water phase monomer (such as m-phenylenediamine) solution, after taking it out, it is contacted with an organic phase monomer (such as trimesoyl chloride) solution, and a nanoscale thick polyamide separation layer is formed by interfacial polymerization, and finally, after heat treatment, cleaning and other post-processing procedures, the structure is solidified to form a composite membrane with high permeability and high selectivity.

[0003] However, the traditional device has the following problems when in use:

[0004] The patent with the patent application publication number CN220071267U discloses a reverse osmosis membrane structure, which has a guide structure on the top of the water production grid, and the flow grooves on the surface of the column in the guide structure facilitate the flow of concentrated water, and also have a guide effect on the concentrated water, avoiding the situation of turbulent flow, and a large amount of scale adheres to the surface of the membrane, reducing the service life of the membrane. The material layer inside the column can enhance the service life of the column, and the smooth layer can provide a channel for the water flow, thereby improving the flow speed of the concentrated water.

[0005] In the prior art, the reverse osmosis membrane is usually directly in contact with the water production grid, and lacks an effective buffer or support structure. In a high-pressure operating environment, the reverse osmosis membrane is subjected to a large stress concentration, and under the action of water flow impact and pressure fluctuation, it is prone to local deformation or material fatigue, thereby causing the reverse osmosis membrane to rupture or even burst, which not only affects the normal operation of the membrane system, but also may cause problems such as water quality degradation, equipment damage, and increased maintenance costs.

[0006] Therefore, we need a high-flux reverse osmosis filtration composite membrane structure and a preparation method thereof to solve the problem of direct contact between the reverse osmosis membrane and the water production grid, and to improve the stability of the reverse osmosis membrane under high-pressure working conditions. SUMMARY

[0007] In view of the deficiencies of the prior art, the present application aims to provide a high-flux reverse osmosis filtration composite membrane structure and a preparation method thereof, which has the advantage of improving the stability of the membrane under high pressure working conditions.

[0008] To achieve the above-mentioned object, the present application provides the following technical scheme: a high-flux reverse osmosis filtration composite membrane structure, comprising a center tube, a water inlet hole one is formed in the center tube, the water inlet hole one is connected to the outer wall on both sides, a membrane bag is fixedly connected to one side of the outer wall of the center tube at the water inlet hole one, two rectangular reverse osmosis membrane sheets are placed back to back to form a pocket shape, the active separation layer is outward, and the three edges are completely sealed with glue, the membrane bag comprises a reverse osmosis membrane sheet, a water production grid, and a buffer pad, the outer wall on both sides of the water production grid is fixedly connected to the opposite side of the two buffer pads, the outer wall of the buffer pad at the bottom of the water production grid is fixedly connected to the back of the reverse osmosis membrane sheet, the outer wall of the buffer pad at the top of the water production grid is fixedly connected to the back of the reverse osmosis membrane sheet, the outer wall of the membrane bag in contact with the center tube is provided with a water inlet hole two, the outer wall of the water inlet hole two is aligned and contacted with the outer wall of the water inlet hole one, the inner wall of the water inlet hole two is fixedly contacted with the outer wall of one end of the water production grid, the outer wall of the opposite side of the two membrane bags is fixedly connected with a water inlet grid, and the outer wall of the membrane bag is movably inserted with a protective shell.

[0009] Preferably, the inner wall of one end of the protective shell is movably mounted with a sealing cover, the inside of the protective shell is movably inserted with a filter plate, the outer wall of one side of the filter plate is fixedly connected to the outer wall of one end of the membrane bag, the inner wall of the protective shell is movably inserted with a conical tube sleeve one, and the outer wall of one end of the conical tube sleeve one is movably contacted with the outer wall of the other side of the filter plate.

[0010] Preferably, the inner wall of the conical tube sleeve one is fixedly connected with a limiting ring, the inner wall of the conical tube sleeve one is movably inserted with a blocking net, the outer wall of one side of the blocking net is movably contacted with the outer wall of one side of the limiting ring, and the outer wall of the other side of the blocking net is movably contacted with a sponge ball, and the outer wall of a plurality of sponge balls is movably contacted with the outer wall of the other side of the filter plate.

[0011] Preferably, the inner wall of the protective shell is movably inserted with a conical tube sleeve two, the outer wall of one end of the conical tube sleeve two is fixedly connected with a sealing tube, and the outer wall of the sealing tube is tightly connected with the inner wall of the conical tube sleeve one.

[0012] Preferably, the outer wall of one side of the conical tube sleeve two is fixedly connected with a buffer spring, the outer wall of one end of the buffer spring is fixedly connected with the outer wall of one side of the conical tube sleeve one, and the inside of the buffer spring is provided with a damping piece.

[0013] Preferably, the inner wall of the protective shell is provided with a clamping groove, the outer wall of the conical tube sleeve one is provided with a mounting groove, and the inside of the mounting groove is fixedly connected with a mounting frame.

[0014] Preferably, the inner wall of the mounting frame is fixedly connected with a mounting rod, the outer wall of the mounting rod is rotatably connected with a clamping block, and the outer wall of the bottom of the clamping block is fixedly connected with a memory alloy plate.

[0015] Preferably, the outer wall of the bottom of the memory alloy plate is fixedly connected with the lower portion of the inner wall of the mounting frame, and the outer wall of the clamping block is movably inserted into the inner wall of the clamping groove.

[0016] Preferably, the inner wall of one side of the sealing cover is fixedly connected with a plug rod, the outer wall of one side of the conical pipe sleeve II is provided with a plug hole, and the outer wall of the plug rod is movably inserted into the inner wall of the plug hole.

[0017] A preparation method of a high-flux reverse osmosis filtering composite membrane structure is based on a high-flux reverse osmosis filtering composite membrane structure, and the preparation method comprises the following steps:

[0018] S1: membrane bag preparation: two reverse osmosis membrane sheets are selected, two buffer pads are fixed on the two sides of a water production grid by means of glue, the water production grid with the fixed buffer pads is adhered to the two reverse osmosis membrane sheets by means of glue in a manner that the active separation layer faces downwards, three edges of the two reverse osmosis membrane sheets are completely sealed by means of glue, and a pocket-shaped membrane bag is formed, and the operation is repeated to combine two membrane bags;

[0019] S2: reverse osmosis component assembly: a water inlet grid is pasted between the two membrane bags to form a reverse osmosis component, a water inlet hole two is reserved at a position aligned with a water inlet hole one of a central pipe at an opening end of the reverse osmosis component, the water inlet hole two is aligned with the water inlet hole one on the central pipe, the reverse osmosis membrane sheets except the water inlet hole two are fixed to the outer wall of the central pipe, and the assembly of the reverse osmosis component and the central pipe is completed;

[0020] S3: installation of components in the protective shell: the wound reverse osmosis component is placed into the protective shell, a filter plate is inserted to contact the reverse osmosis component, the conical pipe sleeve two is manually inserted into the protective shell, the conical pipe sleeve one is inserted due to the connection of the sealing pipe and the buffer spring, the reverse osmosis component is stably arranged in the protective shell when the conical pipe sleeve one contacts and presses the filter plate;

[0021] S4: limiting and fixing of the conical pipe sleeve two: the conical pipe sleeve two is rotated, the conical pipe sleeve one is moved through the damping member, the clamping block is inserted into the clamping groove under the action of the memory alloy plate when the clamping block moves to the clamping groove position, and the conical pipe sleeve one is limited.

[0022] S5: use of the sponge ball: the sponge ball is rolled and collided in front of the filter plate under the water flow to clean the filter plate, and the sponge ball can be taken out and replaced by pulling out the intercepting net with a hook.

[0023] Compared with the prior art, the method has the following beneficial effects:

[0024] By adding a buffer pad to the contact surface between the permeate grid and the membrane bag, pressure pulsations are prevented from directly affecting the reverse osmosis membrane, thus avoiding micro-deformation or rupture. This ensures that the reverse osmosis membrane maintains a relatively flat and stable shape, thereby maintaining its normal separation performance. It effectively reduces the direct impact of pressure on the reverse osmosis membrane, lowers the risk of membrane rupture, extends the service life of the reverse osmosis membrane, and reduces equipment maintenance and replacement costs caused by membrane damage. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the central tube structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the second water inlet hole structure of the present invention.

[0027] Figure 3 This is a schematic diagram of the buffer pad structure of the present invention.

[0028] Figure 4 For the present invention Figure 1 A schematic diagram of the cross-sectional structure from A1 to A2.

[0029] Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle.

[0030] Figure 6 This is a schematic diagram of the protective shell structure of the present invention.

[0031] Figure 7 For the present invention Figure 6 Schematic diagram of the cross-sectional structure from B1 to B2.

[0032] Figure 8 for Figure 7 Enlarged structural diagram at point B.

[0033] Figure 9 This is a schematic diagram of the insertion rod structure of the present invention.

[0034] Figure 10 This is a schematic diagram of the mounting groove structure of the present invention.

[0035] Figure 11 for Figure 10 Enlarged structural diagram at point C.

[0036] Figure 12 This is a schematic diagram of the card block in the non-working state of the present invention.

[0037] Figure 13 for Figure 12 Enlarged structural diagram at point D.

[0038] Figure 14 This is a flowchart of the present invention.

[0039] In the figure: 1, center tube; 11, water inlet hole one; 12, membrane bag; 13, water inlet grid; 14, water inlet hole two; 15, buffer pad; 16, water production grid; 2, protective shell; 21, sealing cover; 22, insertion rod; 23, insertion hole; 3, conical sleeve two; 31, conical sleeve one; 32, sealing tube; 33, buffer spring; 4, filter plate; 41, limiting ring; 42, interception net; 43, sponge ball; 5, mounting groove; 51, mounting frame; 52, memory alloy plate; 53, clamping block; 54, mounting rod; 55, clamping groove. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme of the present application clear, complete description, and the advantages are more clear and obvious, the following will be further described in detail with the embodiments of the present application. It should be understood that the specific embodiments described herein are part of the embodiments of the present application, not all embodiments, only to explain the embodiments of the present application, and not for limiting the embodiments of the present application, all other embodiments obtained by the person skilled in the art without doing creative work, belong to the scope of the present application.

[0041] Embodiment one, please refer to Figures 1 to 14 The present application provides a kind of high flux reverse osmosis filter composite membrane structure technical scheme: including center tube 1, center tube 1 is opened with two sides outer wall and is connected with water inlet hole one 11, the outer wall of center tube 1 is located in water inlet hole one 11 one side and is fixedly connected with membrane bag 12, membrane bag 12 is placed by two rectangular reverse osmosis membrane pieces back to back, make active separation layer outward, completely seal with glue their three edges, form the shape of pocket, membrane bag 12 includes reverse osmosis membrane piece, water production grid 16, buffer pad 15, the outer wall of water production grid 16 two sides and the side opposite to two buffer pads 15 is fixedly connected, the outer wall of water production grid 16 bottom buffer pad 15 and the back of reverse osmosis membrane piece is fixedly connected, the outer wall of water production grid 16 top buffer pad 15 and the back of reverse osmosis membrane piece is fixedly connected, the outer wall of membrane bag 12 and center tube 1 contact is opened with water inlet hole two 14, the outer wall of water inlet hole two 14 and the outer wall of water inlet hole one 11 are aligned and contact, the inner wall of water inlet hole two 14 and the outer wall of one end of water production grid 16 are fixedly contacted, the outer wall of two membrane bags 12 opposite side is fixedly connected with water inlet grid 13, the outer wall of membrane bag 12 is movably inserted with protective shell 2.

[0042] By adding the buffer pad 15 to the contact surface between the water production grid 16 and the membrane bag 12, the pressure pulsation is avoided from directly acting on the reverse osmosis membrane, causing the reverse osmosis membrane to be micro-deformed or broken, ensuring that the reverse osmosis membrane always maintains a relatively flat and stable form, thereby maintaining its normal separation performance, effectively reducing the direct impact of pressure on the reverse osmosis membrane, reducing the risk of reverse osmosis membrane rupture, prolonging the service life of the reverse osmosis membrane, and reducing the equipment repair and replacement costs caused by the damage of the reverse osmosis membrane.

[0043] In example two, on the basis of example one, the inner wall of the protective shell 2 at one end is movably mounted with a sealing cover 21, the inside of the protective shell 2 is movably inserted with a filter plate 4, the outer wall of one side of the filter plate 4 is fixedly connected with the outer wall of one end of the membrane bag 12, the inner wall of the protective shell 2 is movably inserted with a conical tube sleeve 31, the outer wall of one end of the conical tube sleeve 31 is movably contacted with the outer wall of the other side of the filter plate 4, the inner wall of the conical tube sleeve 31 is fixedly connected with a limiting ring 41, the inner wall of the conical tube sleeve 31 is movably inserted with a interception net 42, the outer wall of one side of the interception net 42 is movably contacted with the outer wall of one side of the limiting ring 41, and the outer wall of the other side of the interception net 42 is movably contacted with a sponge ball 43, and the outer walls of the plurality of sponge balls 43 are movably contacted with the outer wall of the other side of the filter plate 4.

[0044] When the one end of the conical tube sleeve 31 is contacted with the filter plate 4, the filter plate 4 will be extruded, and since the filter plate 4 is contacted with the reverse osmosis assembly, when the filter plate 4 is extruded and cannot move, the reverse osmosis assembly is also stably located in the protective shell 2 due to the contact with the filter plate 4, avoiding the movement of the reverse osmosis assembly caused by water flow impact, equipment vibration and other factors during the work process, ensuring the stable progress of the reverse osmosis process, and the stable reverse osmosis assembly can maintain stable hydraulic conditions, so that the water flow uniformly passes through the membrane surface, ensuring the stable output of high flux.

[0045] In example three, on the basis of example two, the inner wall of the protective shell 2 is movably inserted with a conical tube sleeve 32, the outer wall of one end of the conical tube sleeve 32 is fixedly connected with a sealing tube 32, the outer wall of the sealing tube 32 is tightly connected with the inner wall of the conical tube sleeve 31, the outer wall of one side of the conical tube sleeve 32 is fixedly connected with a buffer spring 33, the outer wall of one end of the buffer spring 33 is fixedly connected with the outer wall of one side of the conical tube sleeve 31, and the inside of the buffer spring 33 is provided with a damping member.

[0046] The concentrated water is buffered by the action of the conical sleeve one 31 and the conical sleeve two 3, so that the concentrated water is prevented from directly impacting the reverse osmosis assembly, the surface of the reverse osmosis assembly is effectively protected, the damage and performance decline of the reverse osmosis assembly caused by the impact are reduced, the buffering action of the conical sleeve one 31 and the conical sleeve two 3 disperses the impact force of the concentrated water, so that the pressure borne by the reverse osmosis assembly is evenly distributed, the deformation or displacement of the reverse osmosis assembly caused by excessive local stress is prevented, and the reverse osmosis assembly is ensured to be always in the correct position, so that the filtering function is stably exerted.

[0047] When the conical sleeve two 3 is impacted by the concentrated water, the force is transmitted to the buffer spring 33 and the damping member, the cooperation of the buffer spring 33 and the damping member can disperse and absorb the impact force, so that the force borne by the conical sleeve two 3 is greatly reduced, thereby protecting the conical sleeve two 3 and its connecting parts and prolonging their service life.

[0048] In example four, the inner wall of the protective shell 2 is provided with a clamping groove 55, the outer wall of the conical sleeve one 31 is provided with a mounting groove 5, the inner part of the mounting groove 5 is fixedly connected with a mounting frame 51, the inner wall of the mounting frame 51 is fixedly connected with a mounting rod 54, the outer wall of the mounting rod 54 is rotatably connected with a clamping block 53, the outer wall of the bottom of the clamping block 53 is fixedly connected with a memory alloy plate 52, the outer wall of the bottom of the memory alloy plate 52 is fixedly connected with the lower part of the inner wall of the mounting frame 51, the outer wall of the clamping block 53 is movably inserted into the inner wall of the clamping groove 55, the inner wall of one side of the sealing cover 21 is fixedly connected with a plug rod 22, the outer wall of one side of the conical sleeve two 3 is provided with a plug hole 23, and the outer wall of the plug rod 22 is movably inserted into the inner wall of the plug hole 23.

[0049] Under the action of the memory alloy plate 52, the clamping block 53 is rotated on the mounting rod 54, so that the clamping block 53 is inserted into the inner part of the clamping groove 55, thereby limiting the conical sleeve one 31, and the left and right movement of the conical sleeve one 31 in the protective shell 2 is avoided, and the stability of the conical sleeve one 31 in fixing the reverse osmosis assembly is correspondingly increased.

[0050] Example five, a preparation method of a high-flux reverse osmosis filtering composite membrane structure, is based on any one of examples one to four, and realizes a high-flux reverse osmosis filtering composite membrane structure, the preparation method of the high-flux reverse osmosis filtering composite membrane structure comprises the following steps:

[0051] S1: membrane bag 12 preparation: select two reverse osmosis membrane pieces, fix two buffer pads 15 on both sides of the water production grid 16 with glue respectively, then glue the water production grid 16 with the fixed buffer pad 15 to the two reverse osmosis membrane pieces respectively with the active separation layer downward, completely seal the three edges of the two reverse osmosis membrane pieces with glue to form a pocket-shaped membrane bag, and repeat the operation to combine two membrane bags;

[0052] The pressure pulsation is avoided from directly acting on the reverse osmosis membrane, preventing the reverse osmosis membrane from micro-deformation or rupture, ensuring that the reverse osmosis membrane always maintains a relatively flat and stable form, and maintaining its normal separation performance.

[0053] S2: Reverse osmosis assembly: Paste the water inlet grid 13 between the two membrane bags 12 to form a reverse osmosis assembly, reserve the water inlet hole two 14 at the opening end of the reverse osmosis assembly, which is aligned with the water inlet hole one 11 of the center tube 1, align the water inlet hole two 14 with the water inlet hole one 11 on the center tube 1, and fix the reverse osmosis membrane except the water inlet hole two 14 to the outer wall of the center tube 1 to complete the assembly of the reverse osmosis assembly and the center tube 1.

[0054] Fix the reverse osmosis membrane except the water inlet hole two 14 to the outer wall of the center tube 1 to complete the assembly of the reverse osmosis assembly and the center tube 1, so that the reverse osmosis assembly is stable in structure, and ensure that the water flow can flow along the predetermined path during the filtration process.

[0055] S3: Installation of components in the protective shell 2: Put the wound reverse osmosis assembly into the protective shell 2, insert the filter plate 4 to make it contact with the reverse osmosis assembly, manually insert the conical tube sleeve two 3 into the protective shell 2, and drive the conical tube sleeve one 31 to be inserted due to the connection of the sealing tube 32 and the buffer spring 33, and when the conical tube sleeve one 31 contacts and presses the filter plate 4, the reverse osmosis assembly is stabilized in the protective shell 2.

[0056] Insert the filter plate 4 to make it contact with the reverse osmosis assembly, and the filter plate 4 can preliminarily filter the water flow entering the reverse osmosis assembly to remove larger impurities and improve the effect of subsequent reverse osmosis filtration.

[0057] S4: Limiting and fixing of the conical tube sleeve two 3: Rotate the conical tube sleeve two 3, drive the conical tube sleeve one 31 to move through the damping member, and when the clamping block 53 moves to the position of the clamping groove 55, the clamping block 53 is inserted into the clamping groove 55 under the action of the memory alloy plate 52 to limit the conical tube sleeve one 31.

[0058] Avoid rotating the conical tube sleeve two 3 to keep the reverse osmosis assembly in the correct position, ensure that the water flow uniformly passes through the membrane surface and the pressure is stably transmitted, thereby maintaining the stable progress of the reverse osmosis process, and guaranteeing the high flux output and good desalination rate and other reverse osmosis performance indicators.

[0059] S5: Use of the sponge ball 43: The water flow pushes the sponge ball 43 to roll and collide with the front end surface of the filter plate 4 to clean the filter plate 4, and the sponge ball 43 can be taken out and replaced by pulling out the interception net 42 with a hook.

[0060] The water flow pushes the sponge ball 43 to roll and collide at the front end surface of the filter plate 4, and the soft and elastic characteristics of the sponge ball 43 enable the sponge ball 43 to enter the pores and surface depressions of the filter plate 4, so that the blockage is effectively removed, the normal water permeability of the filter plate 4 is restored, and the filtering efficiency is improved.

[0061] The working principle and use process of the present application: in operation, first, the present application fixes two buffer pads 15 on both sides of the water production grid 16 with glue, and the periphery of the buffer pad 15 is smaller than the periphery of the water production grid 16. After fixing, place a reverse osmosis membrane with the active separation layer facing down on the operation table, then glue the buffer pad 15 to the reverse osmosis membrane, and then fix another reverse osmosis membrane with the buffer pad 15 on the other side. After fixing the two reverse osmosis membranes and the buffer pad 15, seal the three edges of the two reverse osmosis membranes with glue to form a pocket shape. The above method is used to combine two membrane pockets 12, and then the water inlet grid 13 is pasted between the two membrane pockets 12 to form a reverse osmosis assembly. An inlet hole two 14 is reserved at the opening end to align with the inlet hole one 11. Then, the inlet hole two 14 is aligned with the inlet hole one 11 on the center pipe 1. The reverse osmosis membrane except the inlet hole two 14 is fixed to the outer wall of the center pipe 1. The assembly is wound on the outer wall of the center pipe 1. The buffer pad 15 is provided with a through hole. The water passing through the reverse osmosis membrane is introduced into the water production grid 16. The buffer pad 15 is added between the water production grid 16 and the membrane pocket 12 to avoid the pressure pulsation directly acting on the reverse osmosis membrane, which causes the reverse osmosis membrane to deform or break. The reverse osmosis membrane always maintains a relatively flat and stable shape, thereby maintaining its normal separation performance. The direct impact of pressure on the reverse osmosis membrane is effectively reduced, the risk of reverse osmosis membrane rupture is reduced, the service life of the reverse osmosis membrane is prolonged, and the equipment repair and replacement cost caused by damage of the reverse osmosis membrane is reduced.

[0062] The present application introduces the water passing through the reverse osmosis membrane into the water production grid 16 through the through hole in the buffer pad 15, which ensures that the produced water can flow smoothly and stably, avoids water flow disorder caused by pressure pulsation, and makes the produced water enter the water production grid 16 according to the predetermined path and mode, and then enter the center pipe 1 through the inlet hole two 14 and the inlet hole one 11 for collection, thereby ensuring the continuity and stability of the water production process.

[0063] The present application increases the effective filtering area of the reverse osmosis membrane by forming a pocket structure by edge sealing of two reverse osmosis membranes, and filling the water production grid 16 as support in the pocket structure, so that the water flow forms a more stable channel in the membrane pocket 12, reduces the water flow resistance, thereby reducing the pressure loss and improving the water production flux.

[0064] In the application, the rolled reverse osmosis assembly is placed in the inside of the protective shell 2, then the filter plate 4 is inserted into the inside of the protective shell 2 and contacts with the reverse osmosis assembly, then the operator manually inserts the conical sleeve two 3 into the inside of the protective shell 2, since the conical sleeve two 3 is connected with the conical sleeve one 31 through the sealing tube 32 and the buffer spring 33, when the conical sleeve two 3 moves, the conical sleeve one 31 is also inserted into the inside of the protective shell 2, when the one end of the conical sleeve one 31 contacts with the filter plate 4, the filter plate 4 is extruded, since the filter plate 4 contacts with the reverse osmosis assembly, when the filter plate 4 is extruded and cannot move, the reverse osmosis assembly is also stably placed in the protective shell 2 due to the contact with the filter plate 4, so that the movement of the reverse osmosis assembly caused by water flow impact, equipment vibration and other factors is avoided, and the stable reverse osmosis process is ensured, and the stable reverse osmosis assembly can maintain stable hydraulic conditions, so that the water flow uniformly passes through the membrane surface, and the stable output of high flux is ensured.

[0065] In the application, the buffer spring 33 is internally provided with a damping piece, the two ends of the damping piece are fixedly connected with the conical sleeve two 3 and the conical sleeve one 31 respectively, when the conical sleeve one 31 contacts with the filter plate 4, the clamping block 53 moves to the horizontal line where the clamping groove 55 is located, at this time, the operator rotates the conical sleeve two 3, then through the damping piece, the conical sleeve two 3 and the conical sleeve one 31 are connected, the rotation of the conical sleeve two 3 drives the conical sleeve one 31 to move, when the clamping block 53 on the conical sleeve one 31 moves to the position of the clamping groove 55, under the action of the memory alloy plate 52, the clamping block 53 rotates on the mounting rod 54, so that the clamping block 53 is inserted into the inside of the clamping groove 55, thereby limiting the conical sleeve one 31, so that the left and right movement of the conical sleeve one 31 in the inside of the protective shell 2 is avoided, and the stability of the conical sleeve one 31 in fixing the reverse osmosis assembly is correspondingly increased.

[0066] In the application, the conical sleeve one 31 is taken out from the inside of the protective shell 2 by reversely rotating the conical sleeve two 3, then driving the conical sleeve one 31 to move through the rotation of the conical sleeve two 3, and then driving the clamping block 53 to move along the slope of the clamping groove 55 through the rotation of the conical sleeve one 31, so that the clamping block 53 extrudes the memory alloy plate 52 and the clamping block 53 is separated from the inside of the clamping groove 55, the fixation between the clamping block 53 and the clamping groove 55 is released, so that the conical sleeve one 31 can be taken out from the inside of the protective shell 2, and the time and energy of the operator are saved.

[0067] The application drives the sealing cover 21 to insert the plug rod 22 into the inside of the protective shell 2 by the operator, and when the protective shell 2 and the sealing cover 21 are sealed by using the flange connection, the plug rod 22 is inserted into the inside of the insertion hole 23, the conical sleeve two 3 is limited, the rotation of the conical sleeve two 3 in the inside of the protective shell 2 is avoided, the stability of the conical sleeve two 3 is increased, the rotation of the conical sleeve two 3 is effectively avoided, the reverse osmosis assembly is kept in the correct position, the water flow is uniformly ensured to pass through the membrane surface, the pressure is stably transmitted, the stable reverse osmosis process is maintained, the high flux output and the good desalination rate and other reverse osmosis performance indexes are ensured.

[0068] It should be noted that the outer wall of one side of the sealing cover 21 is fixedly connected with the water inlet pipe.

[0069] In the application, when the concentrated water enters the inside of the protective shell 2 through the water inlet pipe under the action of high pressure, the large opening of the conical sleeve two 3 is in the direction of the water inlet pipe, and the large opening of the conical sleeve one 31 is in the direction of the filter plate 4, so that the concentrated water entering the inside of the protective shell 2 enters the inside of the conical sleeve one 31 through the sealing pipe 32, the effect of narrow entry and wide exit of the concentrated water is formed, the concentrated water entering the inside of the protective shell 2 is avoided from directly impacting the reverse osmosis assembly, the concentrated water is buffered through the conical sleeve one 31 and the conical sleeve two 3, the concentrated water directly impacting the reverse osmosis assembly is prevented, the surface of the reverse osmosis assembly is effectively protected, the damage and performance decline of the reverse osmosis assembly caused by the impact are reduced, the buffering effect of the conical sleeve one 31 and the conical sleeve two 3 disperses the impact force of the concentrated water, the pressure borne by the reverse osmosis assembly is uniformly distributed, the deformation or displacement of the reverse osmosis assembly caused by excessive local stress is prevented, and it is ensured that the reverse osmosis assembly is always in the correct position and stably plays the filtering function.

[0070] In the application, the sealing pipe 32 and the conical sleeve two 3 are fixedly connected, and the sealing pipe 32 and the conical sleeve one 31 are slidably connected, when the conical sleeve two 3 is impacted by the concentrated water, the force is transmitted to the buffer spring 33 and the damping member, the buffer spring 33 and the damping member are matched, the impact force is dispersed and absorbed, the force borne by the conical sleeve two 3 is greatly reduced, and the conical sleeve two 3 and the connecting components thereof are protected, and the service life thereof is prolonged.

[0071] The present application sends multiple sponge balls 43 from the water inlet pipe to the inside of the protective shell 2 in contact with the filter plate 4 through the feeder. Since the material of the intercepting net 42 is soft, the intercepting net 42 is pushed from the water inlet pipe to the inside of the conical pipe sleeve one 31 in contact with the limiting ring 41, so as to limit the sponge balls 43 in front of the filter plate 4. The sponge balls 43 can randomly roll and collide at the front end surface of the filter plate 4 under the pushing of the water flow. The soft and elastic characteristics of the sponge balls 43 can make them go deep into the pores and surface depressions of the filter plate 4, effectively remove the blockages and restore the normal water permeability of the filter plate 4, thereby improving the filtering efficiency.

[0072] It should be noted that since the aperture of the intercepting net 42 is large, the water flow cannot change the shape of the intercepting net 42. Since the water flow enters from the front of the intercepting net 42, the water flow is used to make the intercepting net 42 tightly adhere to the limiting ring 41. When the intercepting net 42 is pulled out from the water inlet pipe by the hook, the sponge balls 43 can be taken out for replacement.

[0073] In the present application, the water entering the inside of the protective shell 2 passes through the filter plate 4 into the inside of the water inlet grid 13. The water passes through the membrane bag 12 into the water inlet grid 13 under the action of high pressure, and then is discharged from the inside of the membrane bag 12 through the water inlet hole two 14. The water enters the inside of the central pipe 1 from the water inlet hole one 11, and is collected for water production.

[0074] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-flux reverse osmosis filtration composite membrane structure, comprising a central tube (1), characterized in that: The central tube (1) has an inlet hole (11) with two connected outer walls. A membrane bag (12) is fixedly connected to one side of the outer wall of the central tube (1) at the inlet hole (11). The membrane bag (12) consists of two rectangular reverse osmosis membrane sheets placed back to back with the active separation layer facing outward. Their three sides are completely sealed with glue to form a pocket shape. The membrane bag (12) includes a reverse osmosis membrane sheet, a permeate grid (16), and a buffer pad (15). The outer walls on both sides of the permeate grid (16) are fixedly connected to the opposite side of the two buffer pads (15). The bottom buffer pad of the permeate grid (16) is... The outer wall of the membrane bag (15) is fixedly connected to the back of the reverse osmosis membrane. The outer wall of the buffer pad (15) at the top of the permeate grid (16) is fixedly connected to the back of the reverse osmosis membrane. The outer wall of the membrane bag (12) in contact with the central tube (1) is provided with a second water inlet hole (14). The outer wall of the second water inlet hole (14) is aligned with and in contact with the outer wall of the first water inlet hole (11). The inner wall of the second water inlet hole (14) is fixedly in contact with the outer wall of one end of the permeate grid (16). The outer walls of the two membrane bags (12) on opposite sides are fixedly connected with a water inlet grid (13). The outer wall of the membrane bag (12) is movably inserted with a protective shell (2). A sealing cap (21) is movably installed on the inner wall of one end of the protective shell (2). A filter plate (4) is movably inserted into the inside of the protective shell (2). The outer wall of one side of the filter plate (4) is fixedly connected to the outer wall of one end of the membrane bag (12). A tapered tube sleeve (31) is movably inserted into the inner wall of the protective shell (2). The outer wall of one end of the tapered tube sleeve (31) is in contact with the outer wall of the other side of the filter plate (4). A tapered tube sleeve (3) is movably inserted into the inner wall of the protective shell (2). A sealing tube (32) is fixedly connected to the outer wall of one end of the tapered tube sleeve (3). The outer wall of the sealing tube (32) is tightly fitted to the inner wall of the tapered tube sleeve (31). A buffer spring (33) is fixedly connected to the outer wall of one side of the tapered tube sleeve (33). The outer wall of one end of the buffer spring (33) is fixedly connected to the outer wall of one side of the tapered tube sleeve (31). A damping element is provided inside the buffer spring (33). A rod (22) is fixedly connected to the inner wall of one side of the sealing cap (21), and an insertion hole (23) is opened on the outer wall of one side of the tapered tube sleeve (3). The outer wall of the rod (22) is movably inserted into the inner wall of the insertion hole (23).

2. The high-flux reverse osmosis filtration composite membrane structure according to claim 1, characterized in that: The inner wall of the tapered tube sleeve (31) is fixedly connected to a limiting ring (41), and an intercepting net (42) is movably inserted into the inner wall of the tapered tube sleeve (31). The outer wall of one side of the intercepting net (42) is in contact with the outer wall of one side of the limiting ring (41), and the outer wall of the other side of the intercepting net (42) is in contact with a sponge ball (43). The outer walls of multiple sponge balls (43) are in contact with the outer wall of the other side of the filter plate (4).

3. The high-flux reverse osmosis filtration composite membrane structure according to claim 1, characterized in that: The inner wall of the protective shell (2) is provided with a slot (55), and the outer wall of the tapered tube sleeve (31) is provided with an installation slot (5). An installation frame (51) is fixedly connected inside the installation slot (5).

4. The high-flux reverse osmosis filtration composite membrane structure according to claim 3, characterized in that: The inner wall of the mounting frame (51) is fixedly connected to a mounting rod (54), the outer wall of the mounting rod (54) is rotatably connected to a locking block (53), and the outer wall of the bottom of the locking block (53) is fixedly connected to a shape memory alloy plate (52).

5. The high-flux reverse osmosis filtration composite membrane structure according to claim 4, characterized in that: The outer wall of the bottom of the shape memory alloy plate (52) is fixedly connected to the lower part of the inner wall of the mounting frame (51), and the outer wall of the card block (53) is movably inserted into the inner wall of the card slot (55).

6. A method for preparing a high-flux reverse osmosis filtration composite membrane structure, which is based on the high-flux reverse osmosis filtration composite membrane structure described in any one of claims 1-5, characterized in that: The method for preparing this high-flux reverse osmosis filtration composite membrane structure includes the following steps: S1: Membrane bag (12) preparation: Select two reverse osmosis membrane sheets, fix two buffer pads (15) to both sides of the permeate grid (16) with glue, and then glue the permeate grid (16) with the buffer pads (15) fixed on it to the two reverse osmosis membrane sheets with the active separation layer facing down. Seal the three sides of the two reverse osmosis membrane sheets completely with glue to form a pocket-shaped membrane bag (12). Repeat this operation to combine two membrane bags (12). S2: Reverse osmosis assembly: Paste the inlet grid (13) between the two membrane bags (12) to form a reverse osmosis assembly. Reserve an inlet hole (14) at one end of the reverse osmosis assembly opening, which is aligned with the inlet hole (11) of the central tube (1). Align the inlet hole (14) with the inlet hole (11) on the central tube (1). Fix the reverse osmosis membranes other than the inlet hole (14) to the outer wall of the central tube (1) to complete the assembly of the reverse osmosis assembly and the central tube (1). S3: Installation of internal components of protective shell (2): Place the rolled reverse osmosis component inside the protective shell (2), insert the filter plate (4) so ​​that it contacts the reverse osmosis component, manually insert the second conical tube sleeve (3) into the protective shell (2), because the sealing tube (32) and the buffer spring (33) are connected, the first conical tube sleeve (31) is driven to be inserted. When the first conical tube sleeve (31) contacts and squeezes the filter plate (4), the reverse osmosis component is stabilized inside the protective shell (2); S4: Limiting and fixing of tapered tube sleeve two (3): Rotate tapered tube sleeve two (3) to drive tapered tube sleeve one (31) to move through the damping element. When the locking block (53) moves to the position of the slot (55), under the action of the shape memory alloy plate (52), the locking block (53) inserts into the slot (55) to limit the tapered tube sleeve one (31); S5: Use of sponge ball (43): The water flow pushes the sponge ball (43) to roll and collide with the front end of the filter plate (4) to clean the filter plate (4). The sponge ball (43) can be removed and replaced by pulling out the interception net (42) with a hook.

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