Water purification device using gradient functional membrane with graphene-induced orientation

Abstract

A water purification device comprises a water inlet unit, a membrane water purification unit, a water outlet unit and a control unit, wherein the purification unit comprises a base rotatably connected

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of water purification devices, in particular to a water purification device using gradient functional membrane with graphene-induced orientation. BACKGROUND

[0002] In sudden water pollution accidents caused by natural disasters and environmental pollution accidents, in order to purify polluted water to reach potable level, it is often necessary to use reverse osmosis membranes or ultrafiltration membranes to treat the water. Polluted water treated by the ultrafiltration membrane cannot achieve desired potable level, but polluted water treated by the reverse osmosis membrane can. However, the cost of the reverse osmosis membrane is higher than that of the ultrafiltration membrane, and the reverse osmosis membrane will produce a lot of waste water when the water is treated, resulting in serious waste of water.

[0003] The utility model patent with the application number of 2012206009063 discloses a parallel ultrafiltration membrane water purification device. The device consists of a concentrated water branch pipe, a fresh water branch pipe, a reducing tee, a sampling valve, an ultrafiltration membrane body, a support, a water inlet pipe and a base. An upper end of the base is provided with the support. The ultrafiltration membrane body is fixed on the support by bolts. An upper end of the ultrafiltration membrane body is provided with the reducing tee. The reducing tee communicates with the fresh water branch pipe. One end of the fresh water branch pipe is provided with the sampling valve. One side of the upper end of the ultrafiltration membrane body is provided with the concentrated water branch pipe. A lower end of the ultrafiltration membrane body is provided with the water inlet pipe. Although the ultrafiltration membrane water purification device disclosed by the utility model is high in water purification efficiency, the polluted water after ultrafiltration membrane purification treatment cannot reach the drinking level. In addition, when the ultrafiltration membrane is used for continuous purification treatment of polluted water, impurities are easily attached to a surface of the ultrafiltration membrane, resulting in an increase in water pressure during purification treatment and a decrease in filtering effect on the impurities. Therefore, the ultrafiltration membrane needs to be replaced in time. However, the ultrafiltration membrane water purification device disclosed in this patent cannot realize online cleaning of the ultrafiltration membrane, and the ultrafiltration membrane needs to be disassembled after use, and the filter element of the ultrafiltration membrane is taken out for cleaning. The whole cleaning process is tedious, and the whole water purification device cannot realize continuous online operation. Therefore, aiming at the deficiency of the existing reverse osmosis membrane and the existing ultrafiltration membrane water purification device in sudden water pollution accidents, the present disclosure provides a water purification device using gradient functional membrane with graphene-induced orientation, and the water purification device can solve the above technical problems. SUMMARY

[0004] Aiming at the deficiency of the existing reverse osmosis membrane and the existing ultrafiltration membrane water purification device in sudden water pollution accidents, the embodiments provide a water purification device using gradient functional membrane with graphene-induced orientation.

[0005] The present disclosure is realized through the following technical solution.

[0006] A water purification device using gradient functional membrane with graphene-induced orientation includes water inlet unit, a membrane water purification unit, a water outlet unit and a control unit. The membrane water purification unit includes a base. The base is connected with a columnar body. Multiple columnar water purification cavities are formed in the columnar body in an annular array. A lower end of each of the plurality of columnar water purification cavities is connected with a water inlet connecting pipe extending out of the columnar body. A top of each of the multiple columnar water purification cavities is hermetically and rotatably connected with a water outlet connecting pipe. A lower end of the water outlet connecting pipe is connected with a connecting plug. An upper end of the water outlet connecting pipe is connected with a driven gear. An inner wall of each of the multiple columnar water purification cavities is fixedly connected with a vertical brush bar. An upper end of each of the multiple columnar water purification cavities is connected with a backwashing pipe extending out of the columnar body. An outer end of the backwashing pipe is connected with a one-way valve. Each of the multiple columnar water purification cavities is internally provided with a gradient functional membrane filter element with graphene-induced orientation. A water purification outlet end of the gradient functional membrane filter element with graphene-induced orientation is sealed and plugged with the connecting plug.

[0007] A power assembly for driving the graphene-induced orientation gradient functional filter element to rotate and clean is arranged beside the membrane water purification unit. The power assembly includes a second support. Atop of the second support is provided with a power motor. A motor shaft of the power motor is provided with a driving gear. The driving gear is at a same horizontal height as the driven gear. The driving gear is located on one side of an annular path along which the driven gear rotates along with the columnar body, and is meshed with the driven gear.

[0008] As further arrangement of the solution, the water inlet unit may include a first support. The first support may be provided with a water supply pump. The water supply pump may be provided with a liquid inlet pipe and a liquid outlet pipe. An end, close to the membrane water purification unit, of the liquid outlet pipe may be connected with a first telescopic pipe. An end of the first telescopic pipe may be connected with a water inlet insertion pipe arranged in alignment with the water inlet connecting pipe. The first support may be provided with a pushing device for pushing the water inlet insertion pipe towards the water inlet connecting pipe.

[0009] As further arrangement of the solution, the pushing device may include a pushing cylinder arranged at a lower end of the first support. A connecting plate may be arranged at a joint of the first telescopic pipe and the water inlet insertion pipe. A piston rod end of the pushing cylinder may be connected with the connecting plate.

[0010] As further arrangement of the solution, the water outlet unit may include a carrier plate connected with a top of the first support through springs. The carrier plate may be connected with a second telescopic pipe. A lower end of the second telescopic pipe may be connected with a water outlet insertion pipe arranged in alignment with the water outlet connecting pipe. An upper end of the second telescopic pipe may be connected with a water purification drain pipe.

[0011] As further arrangement of the solution, an upper surface of the columnar body may be concentrically provided with a guide ring body. Roller guide grooves may be uniformly arranged on an upper surface of the guide ring body. The water outlet connecting pipe may be aligned with a corresponding one of the roller guide grooves. A lower surface of the carrier plate may be provided with a roller member abutting against the upper surface of the guide ring body.

[0012] As further arrangement of the solution, the carrier plate may be provided with at least two vertical sliding rods. Sliding holes matched with the at least two vertical sliding rods may be formed in the top of the first support. Each of the springs may be arranged on a corresponding one of the at least two vertical sliding rods between the carrier plate and the top of the first support.

[0013] As further arrangement of the solution, the gradient functional membrane filter element with graphene-induced orientation may include a filter element outer frame and a filter element central tube. The filter element central tube may be concentrically arranged inside the filter element outer frame. An end of the filter element central tube may extend out of an upper end of the filter element outer frame. Water holes may be formed in each of the filter element outer frame and the filter element central tube. An outer surface of the filter element outer frame may be coated with a graphene-induced orientation gradient functional membrane. An inner cavity located between the filter element outer frame and the filter element central tube may be filled with modified activated carbon.

[0014] As further arrangement of the solution, a lower end of the second support, on one side facing the membrane water purification unit, may be provided with a liquid receiving tank located below the water inlet connecting pipe.

[0015] As further arrangement of the solution, the water inlet unit and the water outlet unit may be provided with a liquid flow meter, and the liquid flow meter may be electrically connected with the control unit.

[0016] As further arrangement of the solution, an end of the water outlet unit may be further connected with a disinfection device.

[0017] Compared with the prior art, the embodiments have the following beneficial effects.

[0018] According to the water purification device in the embodiments, through the membrane water purification unit designed in a special structure, when the filtration effect of the gradient functional membrane filter element with graphene-induced orientation being used in the membrane water purification unit is reduced, the columnar body can rotate at a fixed angle so as to quickly switch a new filter element into the purification treatment process of a polluted water , the filter element does not need to be disassembled, assembled and replaced in the whole process, the switching process is rapid, and the continuous water treatment process of the water purification device cannot be affected.

[0019] According to the water purification device in the embodiments, on the premise that the membrane water purification unit has rotating and switching functions, the vertical brush bar with flexible bristles is arranged inside the columnar water purification cavity. In addition, through the design of a power motor, a driving gear, a driven gear and a water outlet connecting pipe, the switched filter element can clean impurities on a membrane surface during the self-rotating process, and the cleaning effect of the filter element can be ensured by combining a washing fluid filled into the backwashing pipe. The whole membrane water purification unit realizes online automatic cleaning of the filter element without the need of disassembling the filter element from the membrane water purification unit and manually cleaning the filter element, so that the labor intensity of operators is reduced.

[0020] The water purification device using gradient functional membrane with graphene-induced orientation in the embodiments adopt the ultrafiltration membrane prepared with graphene as a chain segment-induced orientation enhancer and modified activated carbon as a filter medium in cooperation with modified activated carbon as a filtration medium so as to realize effective purification treatment of the polluted water. The waste water treated by the gradient functional membrane filter element with graphene-induced orientation achieves the effect of potable water. Compared with the existing reverse osmosis water purification device, the cost of the filter element in the whole water purification device is lower, and waste water cannot be generated, so that the waste of water resources is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To describe the technical solutions in the embodiments of the present discourse more clearly, the following briefly describes the drawings required for describing the embodiments. Apparently, the drawings in the following descriptions show merely some embodiments of the present disclosure, and a person of ordinary skill in the art may derive other drawings from these drawings without creative efforts.

[0022] FIG. lisa first solid structural schematic diagram according to the present disclosure.

[0023] FIG. 2 is a second solid structural schematic diagram according to the present disclosure.

[0024] FIG. 3 is a first solid structural schematic diagram of a membrane water purification unit according to the present disclosure.

[0025] FIG. 4 is a second solid structural schematic diagram of the membrane water purification unit according to the present disclosure.

[0026] FIG. 5 is a partial solid section view of a columnar body according to the present disclosure.

[0027] FIG. 6 is a solid structural schematic diagram of a water inlet unit according to the present disclosure.

[0028] FIG. 7 is a solid structural schematic diagram of a water outlet unit according to the present disclosure.

[0029] FIG. 8 is an amplified structural schematic diagram at the part A in FIG. 2 according to the present disclosure.

[0030] FIG. 9 is a solid structural schematic diagram of a gradient functional membrane filter element with graphene-induced orientation according to the present disclosure.

[0031] FIG. 10 is an internal plane structural schematic diagram of the gradient functional membrane filter element with graphene-induced orientation according to the present disclosure.

[0032] List of the reference characters:

[0033] 1 water inlet unit: 101 first support; 102 water supply pump; 103 liquid inlet pipe; 104 liquid outlet pipe; 105 first telescopic pipe; 106 water inlet insertion pipe; and 107 pushing device;

[0034] 2 membrane water purification unit: 201 base; 202 columnar body; 203 columnar water purification cavity; 204 water inlet connecting pipe; 205 water outlet connecting pipe; 206 connecting plug; 207 driven gear; 208 vertical brush bar; 209 backwashing pipe; and 210 one-way valve;

[0035] 3 water outlet unit: 301 spring; 302 carrier plate; 303 second telescopic pipe; 304 water outlet insertion pipe; 305 water purification drain pipe; 306 guide ring body; 307 roller guide groove; 308 roller member; and 309 vertical sliding rod;

[0036] 4 control unit;

[0037] 5 gradient functional membrane filter element with graphene-induced orientation: 501 filter element outer frame; 502 filter element central tube; 503 water hole; 504 modified activated carbon; and 505 graphene-induced orientation gradient functional membrane;

[0038] 6 power assembly: 601 second support; 602 power motor; 603 driving gear; and 604 liquid receiving tank;

[0039] 7 liquid flow meter; and

[0040] 8 disinfection device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] To make a person skilled in the art understand the technical solutions in the present disclosure better, the following clearly and completely describes the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely some rather than all of the embodiments of the present disclosure. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0042] It needs to be illustrated that under the compatible condition, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. The present disclosure will be described in detail below with reference to FIG. 1 to FIG. 10 in conjunction with the embodiments.

[0043] Embodiment I

[0044] The embodiment I provides a water purification device using gradient functional membrane with graphene-induced orientation. Referring to FIG. 1 and FIG. 2, main bodies of the water purification device include a water inlet unit 1, a membrane water purification unit 2, a water outlet unit 3 and a control unit. The water inlet unit 1 and the water outlet unit 3 are respectively connected with an inlet and outlet end of the membrane water purification unit 2, so that a polluted water is drained from the water outlet unit 3 after treated by the membrane water purification unit 2.

[0045] Referring to FIG. 3, FIG. 4 and FIG. 5, the membrane water purification unit 2 includes a base 201 and a columnar body 202. The columnar body 202 is rotatably connected to the base 201, and the base 201 is provided with a driving motor. A motor shaft of the driving motor and a rotating shaft at a lower end of the columnar body 202 are connected through a chain or a transmission belt, so that constant-angle rotation for driving the columnar body 202 is realized.

[0046] Multiple columnar water purification cavities 203 are formed in the columnar body 202 in an annular array. Six columnar water purification cavities 203 are provided in the figures, and a lower end of each columnar water purification cavity 203 is connected with a water inlet connecting pipe 204 extending out of the columnar body 202. A top of each columnar water purification cavity 203 is rotatably connected with a water outlet connecting pipe 205 through a sealing bearing. A lower end of the water outlet connecting pipe 205 is connected with a connecting plug 206, and an upper end of the water outlet connecting pipe 205 is connected with a driven gear 207. An inner wall of each columnar water purification cavity 203 is fixedly connected with a vertical brush bar 208, and the vertical brush bar 208 is vertically arranged along an axis direction of the columnar water purification cavity 203, so that flexible bristles on the vertical brush bar 208 are arranged towards a central axis of the columnar water purification cavity 203.

[0047] An upper end of the columnar water purification cavity 203 is connected with a backwashing pipe 209 extending out of the columnar body 202. An outer end of the backwashing pipe 209 is connected with a one-way valve 210. Through the design of the one-way valve 210, a washing fluid in the columnar water purification cavity 203 cannot flow out through the backwashing pipe 209. When the columnar water purification cavity 203 needs to be washed, the washing fluid can be connected with an outer end of the backwashing pipe 209, and the columnar water purification cavity 203 is filled with the washing fluid.

[0048] Each columnar water purification cavity 203 is internally provided with a gradient functional membrane filter element with graphene-induced orientation 5, and a water purification outlet end of the gradient functional membrane filter element with graphene-induced orientation 5 is sealed and plugged with the connecting plug 206, so that the gradient functional membrane filter element with graphene-induced orientation 5 can rotate along with the water outlet connecting pipe 205. In addition, in order to facilitate the replacement of the gradient functional membrane filter element with graphene-induced orientation 5 in the columnar water purification cavity 203, disassembly ports are formed in a lower end of the columnar body 202, and a bottom cover plate is sealed in each disassembly port.

[0049] Referring to FIG. 9 and FIG. 10, the gradient functional membrane filter element with graphene-induced orientation 5 in the embodiment includes a filter element outer frame 501 and a filter element central tube 502. The filter element central tube 502 is concentrically arranged inside the filter element outer frame 501, and an upper end of the filter element central tube 502 extends out of an upper end of the filter element outer frame 501. An outer surface of the filter element central tube 502 is provided with a key bar, so that the filter element center tube 502 may rotate along with the water outlet connecting pipe 205 after connected with the connecting plug 206. Water holes 503 are formed in each of the filter element outer frame 501 and the filter element central tube 502, and an outer surface of the filter element outer frame 501 is coated with a graphene-induced orientation gradient functional membrane 505. In addition, an inner cavity located between the filter element outer frame 501 and the filter element central tube 502 is filled with modified activated carbon 504.

[0050] The graphene-induced orientation gradient functional membrane 505 is an ultrafiltration membrane prepared by using graphene with a two-dimensional planar structure and moderate hydrophobicity as a segment-induced orientation enhancer and uniformly dispersing the graphene in a polymer casting solution. The pure water flux of the ultrafiltration membrane is greater than 600 L / m2h (0.1 MPa, 25 °C), the tensile strength at break is greater than or equal to 5 MPa, the elongation at break is greater than or equal to 250%, and the nominal pore size of the membrane is less than 30 nm. The preparation cost of the graphene-induced orientation gradient functional membrane 505 is only 70% of that of an existing ordinary ultrafiltration membrane, and the filtration effect is improved by 12% compared with that of the existing ordinary ultrafiltration membrane, so that the economic value and water purification effect are high.

[0051] The modified activated carbon 504 is made of micron zero-valent iron and silver as active components, and is loaded on a carrier by impregnation and liquid phase reduction to prepare activated carbon loaded with micron zero-valent iron and silver. Through high-temperature activation and ester hydrolysis of the activated carbon loaded with micron zero-valent iron and silver, the silver / iron-loaded hydrophilic modified activated carbon is prepared and obtained. The modified activated carbon 504 after silver / iron-loaded hydrophilic modification has the functions of adsorption, oxidation, reduction, sterilization and the like, and has adsorption and removal effects on heavy metals, chemicals and radioactive elements. The removal rate is greater than or equal to 85%.

[0052] Referring to FIG. 3, a power assembly 6 for driving the filter element to rotate and clean is arranged beside the membrane water purification unit 2. The power assembly 6 includes a second support 601. A top of the second support 601 is provided with a power motor 602. A motor shaft of the power motor 602 is provided with a driving gear 603. In the design process, the driving gear 603 is at the same horizontal height as the driven gear 207, and the driving gear 603 is located on one side of an annular path along which the driven gear 207 rotates along with the columnar body 202, and the driving gear 603 is meshed with the driven gear 207.

[0053] When the columnar body 202 rotates at a fixed angle to rotate the gradient functional membrane filter element with graphene-induced orientation 5 to be cleaned to the position of the power assembly 6, the driving gear 603 can be meshed with the corresponding driven gear 207, the gradient functional membrane filter element with graphene-induced orientation 5 may rotate around own axis in the columnar water purification cavity 203 under the meshing transmission of the power motor 602 and the gear, and impurities on a membrane surface are effectively cleaned by the flexible bristles on the vertical brush bar 208 during the rotation process. The washing fluid filled into the backwashing pipe 209 can be used for washing during the cleaning process to clean the surface of the gradient functional membrane filter element with graphene-induced orientation 5, and waste water generated by cleaning is drained from the corresponding water inlet connecting pipe. In addition, in order to collect the drained washing waste water, a lower end of the second support 601, on one side facing the membrane water purification unit 2, is provided with a liquid receiving tank 604 located below the water inlet connecting pipe 204.

[0054] Referring to FIG. 6, FIG. 7 and FIG. 8, specifically, the water inlet unit 1 includes a first support 101. The first support 101 is provided with a water supply pump 102. The water supply pump 102 is provided with a liquid inlet pipe 103 and a liquid outlet pipe 104. The liquid inlet pipe 103 may be connected with the polluted water through a pipeline, and an end, close to the membrane water purification unit 2, of the liquid outlet pipe 104 is connected with a first telescopic pipe 105. An end of the first telescopic pipe 105 is connected with a water inlet insertion pipe 106, and the water inlet insertion pipe 106 is arranged in alignment with the water inlet connecting pipe 204.

[0055] The first support 101 is provided with a pushing device 107 for pushing the water inlet insertion pipe 106 towards the water inlet connecting pipe 204. The pushing device 107 includes a pushing cylinder 1071 arranged at a lower end of the first support 101. A connecting plate 1072 is arranged at a joint of the first telescopic pipe 105 and the water inlet insertion pipe 106. A piston rod end of the pushing cylinder 1071 is connected with the connecting plate 1072. After the water inlet connecting pipe 204 rotates to be aligned with the water inlet insertion pipe 106, the pushing cylinder 1071 is started to hermetically insert the water inlet insertion pipe 106 into the water inlet connecting pipe 204, and the polluted water is fed by the water supply pump 102.

[0056] The water outlet unit 3 includes a carrier plate 302 connected with a top of the first support 101 through springs 301. The carrier plate 302 is connected with a second telescopic pipe 303. A lower end of the second telescopic pipe 303 is connected with a water outlet insertion pipe 304 arranged in alignment with the water outlet connecting pipe 205, and an upper end of the second telescopic pipe 303 is connected with a water purification drain pipe 305. In order to achieve that the water outlet unit 3 can be automatically connected with the water outlet insertion pipe 304 in the rotating and switching process of the columnar body 202, an upper surface of the columnar body 202 is concentrically provided with a guide ring body 306, and roller guide grooves 307 aligned with the water outlet connecting pipes 205 are uniformly arranged on an upper surface of the guide ring body 306. A lower surface of the carrier plate 302 is provided with a roller member 308 abutting against the upper surface of the guide ring body 306. Finally, the water outlet unit also includes vertical sliding rods 309 arranged on the carrier plate 302, and the number of the vertical sliding rods 309 is at least two. In addition, sliding holes matched with the vertical sliding rods 309 are formed in the top of the first support 101, and the springs 301 are arranged on the vertical sliding rods 309 between the carrier plate 302 and the top of the first support 101. When the column 202 rotates and switches the gradient functional membrane filter element with graphene-induced orientation 5, the guide ring body 306 of the water outlet unit 3 may push the roller member 308, and the carrier plate 302 and the water outlet insertion pipe 304 move upward, so that the water outlet insertion pipe 304 is separated from the water outlet connecting pipe 205. After rotated to be aligned with the next gradient functional membrane filter element with graphene-induced orientation 5, the water outlet insertion pipe 304 may move downward again due to the action of the roller guide groove 307 and the roller member 308 and the action of the spring 301, so that the water outlet insertion pipe 304 is automatically inserted into the corresponding water outlet connecting pipe 205, and the gradient functional membrane filter element with graphene-induced orientation 5 is put into use.

[0057] Embodiment II

[0058] The embodiment II discloses a water purification device using gradient functional membrane with graphene-induced orientation. The water purification device is further improved and designed based on the technical solution in the first embodiment. The similarities between the second embodiment and first embodiment are not explained again, but the difference lies in that the whole water purification device in the second embodiment is further provided with a disinfection device and an automatic control system.

[0059] The disinfection device 8 includes a disinfection cabinet arranged beside the membrane water purification unit 2. The water purification drain pipe 305 in the water outlet unit is connected with an inner cavity of the disinfection cabinet, and a lower end of the other side of the disinfection cabinet is connected with a safety connecting pipe. The disinfection cabinet is internally provided with an ultraviolet disinfection mechanism (not shown in the figure), purified water is further disinfected by using ultraviolet rays to ensure the drinking safety of the disinfection cabinet.

[0060] The automatic control system includes liquid flow meters 7 arranged on the water inlet unit 1 and the water outlet unit 3. The two liquid flow meters 7 are electrically connected with the control unit 4 as information collection units. Whether the gradient functional membrane filter element with graphene-induced orientation 5 is blocked and whether the filtration purification effect is obviously reduced is judged by judging the numerical deviation of the two liquid flow meters 7. Once the value of the liquid flow meter 7 on the water outlet unit 3 is found to be far lower than that on the water inlet unit 1, the control unit 4 directly controls the columnar body 202 to rotate and switch the new gradient functional membrane filter element with graphene-induced orientation 5 to be put into use, and simultaneously the corresponding cleaning molding is started. The rotating process of the gradient functional membrane filter element with graphene-induced orientation 5 is used, and the vertical brush bar 208 and the filled washing fluid are combined for cleaning.

[0061] The foregoing descriptions are merely exemplary embodiments of the present disclosure, but are not intended to limit the present disclosure. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure shall fall within the protection scope of the present disclosure.

Claims

1. A water purification device using gradient functional membrane with graphene-induced orientation, comprising a water inlet unit, a membrane water purification unit, a water outlet unit and a control unit, wherein the membrane water purification unit comprises a base, the base is rotatably connected with a columnar body, a plurality of columnar water purification cavities are formed in the columnar body in an annular array, a lower end of each of the plurality of columnar water purification cavities is connected with a water inlet connecting pipe extending out of the columnar body, a top of each of the plurality of columnar water purification cavities is hermetically and rotatably connected with a water outlet connecting pipe, a lower end of the water outlet connecting pipe is connected with a connecting plug, an upper end of the water outlet connecting pipe is connected with a driven gear, an inner wall of each of the plurality of columnar water purification cavities is fixedly connected with a vertical brush bar, an upper end of each of the plurality of columnar water purification cavities is connected with a backwashing pipe extending out of the columnar body, the backwashing pipe communicates with an interior of each of the plurality of columnar water purification cavities, an outer end of the backwashing pipe is connected with a one-way valve, a gradient functional membrane filter element with graphene-induced orientation is provided in the interior of each of the plurality of columnar water purification cavities and comprises a graphene-induced orientation gradient functional membrane that is an ultrafiltration membrane prepared with graphene as a chain segment-induced orientation enhancer, and a water purification outlet end of the gradient functional membrane filter element with graphene-induced orientation is connected and plugged with the connecting plug in a sealed manner;a power assembly for driving the gradient functional membrane filter element with graphene-induced orientation to rotate and clean is arranged beside the membrane water purification unit, the power assembly comprises a second support, a top of the second support is provided with a power motor, a motor shaft of the power motor is provided with a driving gear, the driving gear is at a same horizontal height as the driven gear, and the driving gear is located on one side of an annular path along which the driven gear rotates along with the columnar body, and is meshed with the driven gear.

2. The water purification device using gradient functional membrane with graphene-induced orientation according to claim 1, wherein the water inlet unitcomprises a first support, the first support is provided with a water supply pump, the water supply pump is provided with a liquid inlet pipe and a liquid outlet pipe, an end, close to the membrane water purification unit, of the liquid outlet pipe is connected with a first telescopic pipe, an end of the first telescopic pipe is connected with a water inlet insertion pipe arranged in alignment with the water inlet connecting pipe, and the first support is provided with a pushing device for pushing the water inlet insertion pipe towards the water inlet connecting pipe.

3. The water purification device using gradient functional membrane with graphene-induced orientation according to claim 2, wherein the pushing device comprises a pushing cylinder arranged at a lower end of the first support, a connecting plate is arranged at a joint of the first telescopic pipe and the water inlet insertion pipe, and a piston rod end of the pushing cylinder is connected with the connecting plate.

4. The water purification device using gradient functional membrane with graphene-induced orientation according to claim 1, wherein the water outlet unit comprises a carrier plate connected with a top of the first support through springs, the carrier plate is connected with a second telescopic pipe, a lower end of the second telescopic pipe is connected with a water outlet insertion pipe arranged in alignment with the water outlet connecting pipe, and an upper end of the second telescopic pipe is connected with a water purification drain pipe.

5. The water purification device using gradient functional membrane with graphene-induced orientation according to claim 4, wherein an upper surface of the columnar body is concentrically provided with a guide ring body, roller guide grooves are uniformly arranged on an upper surface of the guide ring body, the water outlet connecting pipe is aligned with a corresponding one of the roller guide grooves, and a lower surface of the carrier plate is provided with a roller member abutting against the upper surface of the guide ring body.

6. The water purification device using gradient functional membrane with graphene-induced orientation according to claim 5, wherein the carrier plate is provided with at least two vertical sliding rods, sliding holes matched with the at least two vertical sliding rods are formed in the top of the first support, and each of the springs is arranged on a corresponding one of the at least two vertical sliding rods between the carrier plate and the top of the first support.

7. The water purification device using gradient functional membrane with graphene-induced orientation according to claim 1, wherein the gradient functionalmembrane filter element with graphene-induced orientation comprises a filter element outer frame and a filter element central tube, the filter element central tube is concentrically arranged inside the filter element outer frame, an end of the filter element central tube extends out of an upper end of the filter element outer frame, water holes are formed in each of the filter element outer frame and the filter element central tube, an outer surface of the filter element outer frame is coated with the graphene-induced orientation gradient functional membrane, and an inner cavity located between the filter element outer frame and the filter element central tube is filled with modified activated carbon.

8. The water purification device using gradient functional membrane with graphene-induced orientation according to claim 1, wherein a lower end of the second support, on one side facing the membrane water purification unit, is provided with a liquid receiving tank located below the water inlet connecting pipe.

9. The water purification device using gradient functional membrane with graphene-induced orientation according to claim 1, wherein each of the water inlet unit and the water outlet unit is provided with a liquid flow meter, and the liquid flow meter is electrically connected with the control unit.

10. The water purification device using gradient functional membrane with graphene-induced orientation according to claim 1, wherein an end of the water outlet unit is further connected with a disinfection device.

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