A spiral rotary reverse osmosis membrane device

Abstract

The application discloses a spiral rotating reverse osmosis membrane device, which comprises an outer cylinder, a center tube and a reverse osmosis membrane assembly, wherein the reverse osmosis membrane assembly comprises reverse osmosis membranes folded around the outer periphery of the center tube and a separation net arranged between the adjacent reverse osmosis membranes after folding; each folded page forms a reverse osmosis membrane page, and the long-strip-shaped opening of the inner side of each reverse osmosis membrane page after folding is arranged in a slope with a set angle relative to the central axis of the center tube, forming a spiral surrounding structure; the center tube is arranged in the center of the reverse osmosis membrane assembly and communicates with the inner side of the reverse osmosis membrane assembly; a plurality of water inlet long holes are arranged on the center tube and correspond to the long-strip-shaped openings of the reverse osmosis membrane pages; the lower end of the center tube is connected with a water outlet pipe, the water outlet pipe is pivotally connected with a water outlet end cover through a sealing bearing, and a rotating driving mechanism is connected to the water outlet pipe. The reverse osmosis membrane and the center tube of the application form a spiral structure, which effectively improves the water production rate in the water purification process of the reverse osmosis membrane and improves the purification efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of reverse osmosis membrane technology, especially a kind of spiral rotating reverse osmosis membrane device. BACKGROUND

[0002] Water purification is an important technology to improve the living environment of human beings on earth, and in today's increasingly developed industrial development, sewage treatment, water purification and water purification in polluted areas to obtain water resources are necessary technologies for human beings to continue to survive on this earth. In the water purification technology, the way to obtain purified water source through reverse osmosis membrane technology is the most economical and effective way. Reverse osmosis membrane is a kind of artificial semi-permeable membrane with certain characteristics, which is the core component of reverse osmosis technology. The principle of reverse osmosis technology is to separate water and other substances from the semi-permeable membrane under the action of higher solution osmotic pressure. The membrane pore size of reverse osmosis membrane is very small, so it can effectively remove dissolved salts, colloids, microorganisms and organic matter in water. The system has the advantages of good water quality, low energy consumption, no pollution, simple process and easy operation. However, the reverse osmosis membrane device generally adopts a winding drum structure, and after the water enters the front end, the separated purified product water and the concentrated water containing pollutants are obtained through the shunt of the winding membrane. New water resources are obtained by collecting product water.

[0003] The conventional single-winding reverse osmosis membrane device has a large reverse osmosis membrane area, but due to the high pressure, the flow resistance of the purified water in the reverse osmosis membrane assembly also limits the water production rate of the reverse osmosis membrane device, and the water production speed is slow. SUMMARY

[0004] The technical problem solved by the present application is to provide a spiral rotating reverse osmosis membrane device, which forms a spiral structure, effectively improves the water production rate in the reverse osmosis membrane purification process, and improves the purification efficiency.

[0005] The technical solution of the present application is:

[0006] A spiral rotating reverse osmosis membrane device, comprising an outer cylinder, a center pipe and a reverse osmosis membrane assembly,

[0007] The reverse osmosis membrane assembly comprises reverse osmosis membranes folded around the outer periphery of the center pipe, and a separation net arranged between adjacent reverse osmosis membranes after folding to separate the two sides of the reverse osmosis membranes; each folded page forms a reverse osmosis membrane page, and the long strip-shaped opening of the inner side surface of each folded membrane page is inclined at a certain angle with the center axis of the center pipe, forming a spiral ring structure.

[0008] The outer cylinder is sleeved outside the reverse osmosis membrane assembly, and a water inlet end cover and a water outlet end cover are respectively provided at both ends of the outer cylinder. The water inlet end cover is provided with a water inlet port, and the water inlet port is communicated with the outside of the reverse osmosis membrane assembly;

[0009] The central tube is arranged at the center of the reverse osmosis membrane assembly and is connected to the inner side of the reverse osmosis membrane assembly; the central tube is provided with a plurality of inclined water inlet holes corresponding to the long strip openings of the reverse osmosis membrane leaves; the lower end of the central tube is connected to the water outlet pipe port, and the water outlet pipe port is pivotally connected to the water outlet end cover via a sealed bearing; the water outlet pipe port is connected to a rotary drive mechanism.

[0010] In the spiral rotary reverse osmosis membrane device as described above, each of the long water inlet holes is provided with a water guiding slope on the side wall at the rear side in the rotation direction of the central tube.

[0011] In the spiral rotary reverse osmosis membrane device as described above, a spiral rod structure is provided in the central tube, and the front end of the spiral rod structure passes through the water inlet end cover via a sealing bearing connection and is connected to a second rotary drive mechanism.

[0012] As described above, the spiral rotary reverse osmosis membrane device, wherein a buffer pipe connecting the front end and the rear end of the central tube is provided on the inner side wall of the central tube, the buffer pipe is provided with a return water outlet at the front end, and a return water inlet is provided at a position near the water outlet in the central tube.

[0013] In the spiral rotary reverse osmosis membrane device as described above, the outer side wall of the buffer pipe protruding into the center pipe is provided with a second water guiding slope.

[0014] From the above description, it can be seen that the present invention has the following advantages:

[0015] The spiral rotary reverse osmosis membrane device of the present invention cleverly surrounds the reverse osmosis membrane pages in a spiral rotation around the central tube, thereby increasing the inward opening distance of each reverse osmosis membrane page, thereby strengthening the pressure difference guiding effect of the purified water flowing from the reverse osmosis membrane pages to the central tube, and accelerating the speed at which the purified water is discharged from the central tube. Furthermore, the central tube is configured as a self-rotating tube structure, and each water inlet long hole is provided with a water-guiding slope, thereby driving and accelerating the flow of purified water into the central tube through the rotation of the central tube. In addition, the spiral rod structure within the central tube can utilize the principle of the screw rod to drive and transport the purified water toward the water outlet, thereby accelerating the transportation speed of the purified water. After accelerating the transportation speed of the purified water, the pressure inside the reverse osmosis membrane is further reduced, which can further enhance the reverse osmosis effect of the reverse osmosis membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Fig. 1A schematic structural diagram of a preferred embodiment of the present invention;

[0017] Fig. 2 This is a partial structural diagram of the reverse osmosis membrane sheet and central tube of a preferred embodiment of the present invention.

[0018] Description of main component numbers:

[0019] The present invention:

[0020] 1: Outer cylinder 11: Water inlet cover 12: Water outlet cover

[0021] 13: Water outlet 2: Reverse osmosis membrane assembly 21: Reverse osmosis membrane page

[0022] 3: Center pipe 31: Water inlet long hole 32: Buffer pipe

[0023] 4: Screw rod structure 41: Spiral blade 5: Rotation drive mechanism

[0024] 6: Second rotary drive mechanism 7: Sealed bearing DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0026] A spiral rotary reverse osmosis membrane device of the present invention, in its preferred embodiment, please refer to Figs. 1-2As shown, the spiral rotary reverse osmosis membrane device of the present invention preferably includes an outer cylinder 1, a central tube 3, and a reverse osmosis membrane assembly 2. The reverse osmosis membrane assembly 2 includes a reverse osmosis membrane folded around the outer circumference of the central tube 3, and a spacer disposed between adjacent reverse osmosis membranes after folding to separate the two sides of the reverse osmosis membrane. Each folded leaf constitutes a reverse osmosis membrane leaf 21. The elongated opening on the inner side of each folded membrane leaf is inclined at a set angle to the central axis of the central tube 3, forming a spiral, winding structure. As shown in the figure, the reverse osmosis membrane leaf 21 is shaped like a single, outwardly extending blade of reverse osmosis membrane after folding. Each reverse osmosis membrane leaf 21 is flanked by reverse osmosis membranes on both sides, and its interior is the reverse osmosis membrane inner side, which is connected to the central tube 3 and isolated from the outside by the reverse osmosis membrane. In this way, raw water enters the reverse osmosis membrane inner side through the reverse osmosis action of the reverse osmosis membrane, producing purified water, which is then output outward along the central tube 3. As shown in the figure, the internal openings of each reverse osmosis membrane page 21 connected to the central tube 3 form an inclined spiral opening around the central tube 3. Compared with the existing form of being arranged parallel to the central axis of the central tube 3, the length of the opening of the reverse osmosis membrane page 21 is greatly increased, so that the clean water in the reverse osmosis membrane page 21 has a larger outlet in the direction of moving toward the central tube 3, and the clean water in the reverse osmosis membrane page 21 has a faster movement speed toward the central tube 3.

[0027] The outer cylinder 1 is sleeved on the outside of the reverse osmosis membrane assembly 2, and a water inlet end cover 11 and a water outlet end cover 12 are respectively provided at its two ends. The water inlet end cover 11 is provided with a water inlet port, and the water inlet port is connected to the outside of the reverse osmosis membrane assembly 2; the outer cylinder 1 is used to cover the reverse osmosis membrane assembly 2, and can be installed in a pressure vessel through the fixation of the water inlet end cover 11 and the water outlet end cover 12.

[0028] The central tube 3 is disposed at the center of the reverse osmosis membrane assembly 2 and communicates with the inner side of the reverse osmosis membrane assembly 2. The central tube 3 is provided with a plurality of water inlet holes 31 inclined to correspond to the elongated openings of the reverse osmosis membrane leaves 21. The lower end of the central tube 3 is connected to the water outlet port 13, which is pivotally connected to the water outlet end cap 12 via a sealed bearing 7. A rotary drive mechanism 5 is connected to the water outlet port 13. As shown in the figure, the central tube 3 is movable, connected to the water outlet port 13 at its lower end, which is pivotally connected to the water outlet end cap 12 via a sealed bearing 7. This allows the rotary drive mechanism 5, which is driven by the water outlet port 13, to drive the central tube 3 to rotate about its central axis via the water outlet port 13. During the central tube 3's rotation, the central tube 3 can accelerate the movement of the purified water, further accelerating the delivery of the purified water into the central tube 3.

[0029] In a preferred embodiment of the spiral rotary reverse osmosis membrane device of the present invention, each of the water inlet holes 31 is provided with a water-guiding slope on the sidewall of the central tube 3, located rearward of the central tube 3 in the direction of rotation. As shown in the figure, the water inlet holes 31 are used to collect purified water from the inner side of the reverse osmosis membrane pages 21 into the central tube 3. The presence of these water-guiding slopes allows the central tube 3 to rotate, cutting through the water-guiding slopes to accelerate the flow of purified water from outside the central tube 3 into the central tube 3. This also creates a lower pressure area on the outer surface of the central tube 3, effectively encouraging the purified water in the reverse osmosis membrane pages 21 to move toward the central tube 3.

[0030] In the preferred embodiment of the spiral rotary reverse osmosis membrane device of the present invention as described above, a spiral rod structure 4 is provided within the central tube 3. The front end of the spiral rod structure 4 is connected to the water inlet end cap 11 via a sealed bearing 7 and is connected to a second rotary drive mechanism 6. As shown in the figure, the spiral rod structure 4 is provided with spiral blades 41. Driven by the second rotary drive mechanism 6, the spiral rod structure 4 rotates and drives the purified water within the central tube 3 toward the water outlet 13, thereby conveying the purified water within the central tube 3 to the water outlet 13 with a relatively large driving force and outputting it outward.

[0031] In a preferred embodiment of the spiral rotary reverse osmosis membrane device of the present invention, a buffer pipe 32 is provided on the inner sidewall of the central tube 3, connecting the front and rear ends of the central tube 3. The buffer pipe 32 has a return water outlet at the front end and a return water inlet within the central tube 3, near the outlet port 13. The buffer pipe 32 is configured to absorb purified water at the return water inlet and return it to the return water outlet based on the pressure difference between the two ends, thereby balancing the pressure conditions at both ends. The buffer pipe 32 prevents excessive pressure differences between the two ends of the central tube 3 during the purified water transport process, which could lead to unbalanced flow of the purified water outside the central tube 3. This ensures a relatively balanced overall driving force for the purified water outside the central tube 3, thereby preventing the accumulation of impurities on the outer side of the reverse osmosis membrane due to rapid reverse osmosis, which could reduce the service life of the reverse osmosis membrane. It also prevents damage to the spiral structure 4 due to the large pressure difference.

[0032] In a preferred embodiment of the spiral rotary reverse osmosis membrane device of the present invention, a second water-guiding slope is provided on the outer wall of the buffer pipe 32 that protrudes into the center tube 3. As shown in the figure, the second water-guiding slope is provided on the outer surface of the wall of the buffer pipe 32 that protrudes into the center tube 3. This ensures that the movement of purified water entering the center tube 3 through the water inlet slot 31 during the rotation of the center tube 3 is not obstructed, thereby preventing the rotating water flow within the center tube 3 from being obstructed.

[0033] The spiral-rotating reverse osmosis membrane device of the present invention cleverly arranges the reverse osmosis membrane leaves 21 in a spiral pattern around the central tube 3. This increases the inward opening distance of each reverse osmosis membrane leaf 21, enhancing the pressure differential guiding effect of the purified water flowing from the reverse osmosis membrane leaves 21 toward the central tube 3 and accelerating the discharge of the purified water from the central tube 3. Furthermore, the central tube 3 is configured as a self-rotating tubular structure, and each water inlet hole 31 is provided with a water-guiding slope. This allows the rotation of the central tube 3 to drive and accelerate the flow of purified water into the central tube 3. Furthermore, the spiral rod structure 4 within the central tube 3 utilizes the principle of a screw to drive and transport the purified water toward the outlet pipe 13, accelerating the delivery of the purified water. This accelerated delivery of purified water further reduces the pressure inside the reverse osmosis membrane, further enhancing the reverse osmosis effect of the reverse osmosis membrane.

[0034] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A spiral rotary reverse osmosis membrane device, characterized in that: Including outer cylinder, central tube and reverse osmosis membrane assembly, The reverse osmosis membrane assembly includes a reverse osmosis membrane folded around the outer periphery of the central tube, and a spacer disposed between adjacent folded reverse osmosis membranes to separate the two sides of the reverse osmosis membrane; each folded leaf constitutes a reverse osmosis membrane page, and the elongated opening on the inner side surface of each folded membrane page is inclined at a set angle to the central axis of the central tube to form a spiral winding structure; The outer cylinder is sleeved outside the reverse osmosis membrane assembly, and a water inlet end cover and a water outlet end cover are respectively provided at both ends of the outer cylinder. The water inlet end cover is provided with a water inlet port, and the water inlet port is communicated with the outside of the reverse osmosis membrane assembly; The central tube is arranged at the center of the reverse osmosis membrane assembly and communicates with the inner side of the reverse osmosis membrane assembly; the central tube is provided with a plurality of water inlet holes inclined corresponding to the long strip openings of the reverse osmosis membrane leaves; the lower end of the central tube is connected to the water outlet pipe, and the water outlet pipe is pivotally connected to the water outlet end cover via a sealed bearing; the water outlet pipe is connected to a rotary drive mechanism; A spiral rod structure is provided in the central tube, the front end of the spiral rod structure passes through the water inlet end cover via a sealed bearing connection and is connected to a second rotary drive mechanism; A buffer pipe is provided on the inner side wall of the central pipe to connect the front end and the rear end of the central pipe. The buffer pipe is provided with a return water outlet at the front end and a return water inlet at a position near the water outlet in the central pipe.

2. The spiral rotary reverse osmosis membrane device according to claim 1, characterized in that: Each of the long water inlet holes is provided with a water guiding slope on the side wall at the rear side in the rotation direction of the central tube.

3. The spiral rotary reverse osmosis membrane device according to claim 2, characterized in that: The outer side wall of the buffer pipe protruding into the center pipe is provided with a second water guide slope.

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