A device and method for preparing granular polymer adsorption material

Abstract

The present invention belongs to the field of composite polymer gel material solidification molding, and specifically relates to a preparation device and method for a granular polymer adsorption material. The device comprises a dripping component, a phase separation component, a nanofiltration component and a cleaning component, wherein the nanofiltration component and the cleaning component are respectively arranged at the front and rear ends of the phase separation component and are both connected to the phase separation component, and the dripping component is arranged above the feed pipe of the phase separation component. The device can industrially batch process granular polymer adsorption materials with apertures, and has good molding and adsorption effects.

Description

Technical Field

[0001] The invention belongs to the field of composite polymer gel material solidification and molding, and in particular relates to a device and method for preparing a granular polymer adsorption material. Background Art

[0002] There are many types of synthetic composite materials, among which polymer gel belongs to a special type of organic functional composite materials. This organic composite polymer material is a system composed of a three-dimensional network or an interpenetrating network formed by cross-linking and polymerization of molecular chains and a solvent (usually water), which is similar to biological tissue. The cross-linked structure makes it insoluble in water and maintains a certain shape, and has certain functionality; for example, microfiltration membranes, ultrafiltration membranes, nanofiltration membranes, reverse osmosis membranes, forward osmosis membranes, etc. are currently used for water treatment. At the same time, this polymer gel can be developed into different forms and shapes. These composite materials of different forms and shapes have certain special functional applications, but there is currently a lack of corresponding preparation devices and methods for preparing granular polymer adsorption materials. At the same time, the use of existing composite polymer materials as casting liquids has poor molding effects on the prepared granular polymer adsorption materials. Summary of the invention

[0003] In order to solve the above problems, the purpose of the present invention is to provide a device and method for preparing granular polymer adsorption materials. The device can industrially batch process granular polymer adsorption materials with pores, and has good molding and adsorption effects.

[0004] The technical solution of the present invention is: a preparation device for granular polymer adsorption material, which includes a dripping component, a phase separation component, a nanofiltration component and a cleaning component. The nanofiltration component and the cleaning component are respectively arranged at the front and rear ends of the phase separation component and are both connected to the phase separation component. The dripping component is arranged above the feed pipe of the phase separation component.

[0005] Furthermore, the dripping assembly includes a dripping pipe and a hot air pipe; the dripping pipe is arranged in the hot air pipe, and a gap is left between the dripping pipe and the hot air pipe, wherein the gap is 1-0.2 times the diameter of the dripping pipe; the length of the hot air pipe is slightly longer than the dripping pipe, wherein the part of the hot air pipe longer than the dripping pipe is 3-0.15 times the diameter of the dripping pipe; a water outlet plate with evenly distributed holes is provided at the liquid outlet of the dripping pipe.

[0006] Furthermore, the nanofiltration component includes a nanofiltration device and a backwash pump; one end of the backwash pump is connected to a backwash water pipeline, and the other end is connected to the nanofiltration device through a three-way valve; the nanofiltration device is connected to the coagulation water tank of the phase separation component through the water production outlet of the three-way valve.

[0007] Furthermore, the phase separation component includes an outer shell, a support frame, a roller and a solidification water tank; the roller is tilted on the support frame through the outer shell, and there is a certain gap between the outer shell and the roller, so that the roller can rotate freely in the outer shell, and the higher end of the roller is provided with a feed pipe opening upward, and the lower end is provided with a trumpet-shaped discharge port; a first water pump is provided on one side of the support frame, and the first water pump is connected to the feed pipe through a pipeline, and a collecting pipe is provided on the other side of the support frame, and the collecting port of the collecting pipe is located below the trumpet-shaped discharge port; the support frame, the first water pump and the collecting pipe are all arranged in the solidification water tank, and the collecting pipe is connected to the cleaning component through the discharge port on one side of the solidification water tank; the roller and the outer shell are evenly arranged in the solidification water tank.

[0008] Furthermore, the cleaning component includes a cleaning water tank with a cover plate and a mixer, the driving part of the mixer is arranged on the cover plate, and the stirring part of the mixer is arranged in the cleaning water tank; a filter plate is arranged horizontally at the lower end of the cleaning water tank; a discharge port is arranged at the bottom of the cleaning water tank, and the discharge port is respectively connected to the second water pump and the washing liquid discharge pipeline, and the other end of the second water pump is connected to the coagulation water tank of the phase separation component; a cleaning liquid water inlet and a receiving port are arranged at the upper end of the cleaning water tank, and the receiving port is connected to the discharge port on one side of the coagulation water tank through a pipeline; a gel discharge port is arranged in the cleaning water tank above the filter plate.

[0009] A method for preparing a granular polymer adsorption material, the method comprising at least the following steps:

[0010] 1) placing the support frame and the first water pump in the coagulation liquid of the coagulation water tank, and placing the roller part obliquely arranged on the support frame in the coagulation liquid of the coagulation water tank;

[0011] 2) Turn on the motor and the first water pump to start working. The motor engages with the meshing teeth on the drum through the chain to drive the drum to rotate slowly;

[0012] 3) The first water pump pumps the coagulation liquid in the coagulation tank into the feed pipe, and at the same time, the casting liquid is dripped into the feed pipe through the dripping pipe. After the casting liquid contacts the coagulation liquid at the feed port of the feed pipe, it quickly separates into phases and fully contacts with the coagulation liquid in the drum. Under the action of gravity, after phase separation and formation, it is discharged into the collection pipe through the trumpet-shaped discharge port of the drum, and enters the cleaning tank through the collection pipe. The gel particles are cleaned by stirring at a certain speed by the mixer, and the washing liquid after cleaning is discharged outside; the cleaned gel particles are discharged through the gel discharge port.

[0013] Furthermore, the coagulation liquid is a mixture of one or more of water, an aqueous solution of dimethylacetamide, and N,N-dimethylformamide.

[0014] Furthermore, the casting solution is prepared from polyvinylidene fluoride, dimethylacetamide, a porogen, graphene oxide, and a diluent in a mass ratio of 7:1:1:1:3.

[0015] Effective benefits of the present invention:

[0016] 1. The present invention uses a first water pump to pump water from a solidification tank into a feed pipe, and at the same time, drips the casting liquid from a feed port of the feed pipe. After the casting liquid contacts the water in the feed port, the phases are rapidly separated; the drum is slowly rotated to allow the casting liquid to fully contact the water in the drum for solidification and molding. The device can industrially batch process granular polymer adsorption materials with apertures, and has good molding and adsorption effects.

[0017] 2. The present invention provides sieve holes on the feed pipe and the drum to facilitate solid-liquid separation; and the drum can be rotated by providing a motor and a chain, so that the casting liquid can fully contact with water and facilitate rapid phase separation and forming.

[0018] 3. The present invention is provided with a plurality of telescopic rods on the base, which is convenient for adjusting the height and inclination of the drum, controlling the amount of water in the drum, providing impulse, and enabling better curing.

[0019] 4. The present invention can easily form a skin layer on the droplet surface of the casting liquid through the droplet pipe and the hot air pipe, and the phase separation is not easily destroyed.

[0020] 5. The device of the present invention includes the dripping of casting liquid, phase separation of gel, gel cleaning and recycling and treatment of solidified water in an integrated manner, which is highly efficient, energy-saving and environmentally friendly and suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings:

[0022] Figure 1 It is a structural diagram of a device for preparing a granular polymer adsorption material of the present invention;

[0023] Figure 2 for Figure 1 A cross-sectional view of the middle dropper 1-1;

[0024] Figure 3 for Figure 1 A cross-sectional view of the middle drum along the 2-2 axis;

[0025] In the figure, 1. dripping pipe; 2. hot air pipe; 3. feeding pipe; 4. drum; 4-1. chain; 4-2. roller; 4-3. support seat; 5. shell; 6. motor; 7. support frame; 8. first water pump; 9. collecting pipe; 10. coagulation water tank; 11. cleaning water tank; 12. mixer; 13. second water pump; 14. booster pump; 15. nanofiltration device; 16. backwash pump; 17. filter plate; 18. three-way valve. DETAILED DESCRIPTION

[0026] The following will combine the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully demonstrate the understanding of the purpose, characteristics and effects of the present invention. The embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technical personnel in this field without creative work are all within the scope of protection of the present invention. The connection relationship involved in the patent design does not refer to a direct connection, but a connection structure formed by adding or deleting connecting accessories according to actual conditions. In order to make the technical means of realizing the present invention, innovative features, purpose and benefits easy to understand, the following will combine the specific attachments to describe the concept, specific structure and technical effects of the present invention, so as to fully demonstrate the understanding of the purpose, characteristics and effects of the present invention. The embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by technical personnel in this field without creative work are all within the scope of protection of the present invention. Figure 1 , Attachment Figure 2 And attached Figure 3 The present invention is further described.

[0027] Example 1

[0028] like Figure 1 As shown, the present invention provides a device for preparing granular polymer adsorption materials, which includes a dripping component, a phase separation component, a nanofiltration component and a cleaning component. The nanofiltration component and the cleaning component are respectively arranged at the front and rear ends of the phase separation component, and are both connected to the phase separation component. The dripping component is arranged above the feed pipe 3 of the phase separation component.

[0029] The nanofiltration component is used to provide solidified water, i.e. water containing low-concentration casting liquid solvent or pure water, to the phase separation component to reduce the amount of wastewater generated during production;

[0030] The droplet assembly is used to provide the casting liquid (composite polymer adsorption material) to the phase separation assembly and control the size of the casting liquid droplets;

[0031] The phase separation component is used to separate the casting liquid into phases to obtain a formed granular polymer adsorption material;

[0032] The cleaning component is used to clean the granular polymer adsorption material after the phase separation component.

[0033] Example 2

[0034] On the basis of Example 1, Figure 2 As shown, the drip assembly includes a drip tube 1 and a hot air pipe 2; the drip tube 1 is arranged in the hot air pipe 2, and a gap is left between the drip tube 1 and the hot air pipe 2, wherein the gap is 1-0.2 times the diameter of the drip tube 1, and the length of the hot air pipe 2 is slightly longer than the drip tube 1 (the part of the hot air pipe 2 that is longer than the drip tube 1 is 3-0.15 times the diameter of the drip tube 1, and the length of the hot air pipe 2 is adjustable); a water outlet plate with evenly distributed holes is provided at the liquid outlet of the drip tube 1.

[0035] The casting liquid passes through the holes at the outlet of the dripping tube to form droplets. Since the dripping tube is covered with a hot air pipe, the droplets are likely to form a cortex on the surface of the droplets when encountering the hot air in the hot air pipe. They are not easily damaged in the phase separation component, and the pore size of the surface of the granular polymer adsorption material formed can be controlled at the same time.

[0036] Further, if Figure 1 As shown, the nanofiltration component includes a nanofiltration device 15 and a backwash pump 16; one end of the backwash pump 16 is connected to a backwash water pipeline, and the other end is connected to the nanofiltration device 15 through a three-way valve 18; the nanofiltration device 15 is connected to the coagulation water tank 10 of the phase separation component through the water production outlet of the three-way valve 18.

[0037] Furthermore, a booster pump 14 is connected in series between the nanofiltration device 15 and the coagulation water tank 10 .

[0038] The backwash water can directly enter the coagulation water tank 10 through the water outlet of the three-way valve 18 through the backwash pump 16, so as to achieve the purpose of cleaning the coagulation water tank 10, or can reach the nanofiltration device 15 through the three-way valve 18, so as to achieve the purpose of cleaning the nanofiltration device 15; the produced water after nanofiltration enters the coagulation water tank through the three-way valve 18, and the concentrated liquid obtained by the nanofiltration treatment and the backwashing effluent are collected for treatment; when the pressure difference between the water inlet end and the water production end of the nanofiltration device reaches the threshold, the nanofiltration device is backwashed. The nanofiltration device is a prior art and will not be described in detail here.

[0039] Furthermore, the phase separation component includes an outer shell 5, a support frame 7, a drum 4 and a solidification water tank 10; the drum 4 is tiltedly arranged on the support frame 7 through the outer shell 5, and there is a certain gap between the outer shell 5 and the drum 4, so that the drum 4 can rotate freely in the outer shell 5, and the higher end of the drum 4 is provided with a feed pipe 3 opening upward, and the lower end is provided with a trumpet-shaped discharge port; a first water pump 8 is provided on one side of the support frame 7, and the first water pump 8 is connected to the feed pipe 3 through a pipeline, and a collecting pipe 9 is provided on the other side of the support frame 7, and the collecting port of the collecting pipe 9 is located below the trumpet-shaped discharge port; the support frame 7, the first water pump 8 and the collecting pipe 9 are all arranged in the solidification water tank 10, and the collecting pipe 9 is connected to the cleaning component through the discharge port on one side of the solidification water tank 10; the drum 4 and the outer shell 5 are evenly arranged in the solidification water tank 10.

[0040] like Figure 3 As shown, the shell 5 is a cylindrical structure or a frame structure, and four support seats 4-3 are evenly distributed along the circumference of the drum 4 at both ends of the inside of the shell 5, and a roller 4-2 is arranged on each support seat 4-3. The drum 4 is arranged in the shell 5 through the roller 4-2, and a motor 6 is fixed to the outside of the shell 5. The outside of the drum 4 is provided with meshing teeth along the circumference, and the rotating shaft of the motor 6 is rotatably connected with the drum 4 through the chain 4-1 and the meshing teeth on the drum 4; the drum 4 is covered with sieve holes.

[0041] Furthermore, rolling grooves corresponding to the roller 4 - 2 are provided at both ends of the drum 4 along the circumferential direction, and the rolling grooves play a guiding role.

[0042] Furthermore, the rotation speed of the drum 4 is 20-120 revolutions per minute.

[0043] The motor 6 of the present invention drives the drum 4 to rotate slowly through a chain, so that the phase-separated casting liquid can fully contact with the coagulation water in the drum 4 and further solidify. The motor 6 is preferably a variable frequency motor.

[0044] Furthermore, the feed pipe 3 is fixedly connected to the shell 5 , with one end extending into the interior of the drum 4 and the other end being placed outside the shell 5 ; a pipeline connected to the first water pump 8 is connected to the pipe wall at the upper end of the feed pipe 3 .

[0045] Furthermore, the feed pipe 3 is a double-layer cylindrical structure, and the inner layer of the feed pipe 3 is covered with sieve holes to avoid the possibility of adhesion between the casting liquid and the wall of the feed pipe 3. A quick-connect interface is provided below the feed pipe 3, and the pipeline is connected to the feed pipe 3 through the quick-connect interface. The quick-connect interface is convenient for installation and disassembly, saving time; the apertures of the sieve holes on the feed pipe 3 and the drum 4 are both 1-3mm, which can prevent the separated particles from leaking out of the sieve holes and can also effectively drain water. The inner and outer layers of the feed pipe 3 are 5-10mm apart.

[0046] Furthermore, the support frame 7 is a base with an inclined table surface, or is composed of a base and a plurality of telescopic rods, and the plurality of telescopic rods are arranged on the base in order from high to low; the inclination angle is 10 to 45 degrees. The inclined setting of the roller can be realized to ensure a certain impact force during the curing process, and at the same time, it is convenient for phase separation. At the same time, the inclination height of the roller and the angle of the inclined surface can be adjusted by setting the plurality of telescopic rods.

[0047] Furthermore, the cleaning component includes a cleaning water tank 11 with a cover plate and a stirrer 12, wherein the driving part of the stirrer 12 is arranged on the cover plate, and the stirring part of the stirrer 12 is arranged in the cleaning water tank 11; a filter plate 17 is horizontally arranged at the lower end of the cleaning water tank 11; a discharge port is arranged at the bottom of the cleaning water tank 11, and the discharge port is respectively connected to the second water pump 13 and the washing liquid discharge pipeline, and the other end of the second water pump 13 is connected to the coagulation water tank 10 of the phase separation component; a cleaning liquid water inlet and a receiving port are arranged at the upper end of the cleaning water tank 11, and the receiving port is connected to the discharge port on one side of the coagulation water tank 10 through a pipeline; and a gel discharge port is arranged at the cleaning water tank 11 above the filter plate 17.

[0048] The gel particle material after phase separation passes through the collecting port of the collecting tube 9 and enters the cleaning water tank 11 from the receiving port. The filter plate 17 at the lower end of the cleaning water tank intercepts the gel particles, and the coagulation liquid returns to the coagulation water tank 10 through the action of the second water pump 13. When a certain amount of gel particles accumulate in the cleaning water tank 11, the feeding is stopped; the cleaning liquid flows into the cleaning liquid inlet, and the mixer 12 stirs at a certain speed to clean the gel particles, and the washing liquid after cleaning is discharged; the cleaned gel particles are discharged through the gel discharge port.

[0049] A method for preparing a granular polymer adsorption material, the method comprising at least the following steps:

[0050] 1) placing the support frame 7 and the first water pump 8 in the coagulation liquid of the coagulation water tank 10, and partially placing the roller 4 obliquely arranged on the support frame 7 in the coagulation liquid of the coagulation water tank 10;

[0051] 2) Turn on the motor 6 and the first water pump 8 to start working. The motor 6 engages with the meshing teeth on the drum 4 through the chain 4-1 to drive the drum 4 to rotate slowly;

[0052] 3) The first water pump 8 pumps the coagulation liquid in the coagulation tank 10 into the feed pipe 3, and at the same time, the casting liquid is dripped into the feed pipe 3 through the dripping tube. After the casting liquid contacts the coagulation liquid at the feed port of the feed pipe 3, it quickly separates into phases and fully contacts with the coagulation liquid in the drum 4. Under the action of gravity, after phase separation and formation, it is discharged into the collecting pipe 9 through the trumpet-shaped discharge port of the drum 4, and enters the cleaning tank 11 through the collecting pipe 9. The gel particles are cleaned by stirring at a certain speed by the mixer 12, and the washing liquid after cleaning is discharged; the cleaned gel particles are discharged through the gel discharge port.

[0053] The coagulation liquid is a mixture of one or more of water, an aqueous solution of dimethylacetamide, and N,N-dimethylformamide.

[0054] Example 3

[0055] On the basis of Example 2, the inner wall of the coagulation tank 10 is coated with one or more coatings selected from epoxy resin, PVC, and PP, which has strong bonding and anti-corrosion properties; the shell 5, support frame 7, roller 4, and collection pipe 9 are made of any one of stainless steel, TPFE (polytetrafluoroethylene), and PVC. In this embodiment, the shell 5, support frame 7, and roller 4 are all made of stainless steel, and the collection pipe 9 is made of PVC. The feed pipe 3 is made of TPFE, and the particles that can be separated are not easy to adhere to the feed pipe.

[0056] The temperature of the coagulation water in the coagulation water tank 10 is controlled in the range of 20-80°C.

[0057] Example 4

[0058] On the basis of Example 2 or 3, the casting solution used in this example is prepared by polyvinylidene fluoride, DMAc (dimethylacetamide), porogen, graphene oxide, and diluent in a mass ratio of 7:1:1:1:3. DMAc can quickly dissolve polyvinylidene fluoride into a colloidal solution; the porogen is pvp polyvinyl pyrrolidone or OP10, which can be uniformly dispersed in a compatible polymer material; graphene oxide can reduce the energy between interfaces; the diluent is one or a combination of polyethylene glycol, tributyl phosphate, dibutyl phosphate, etc.

[0059] The polymer material polyvinylidene fluoride is prepared into a casting liquid (composite polymer material) using DMAc, a porogen, graphene oxide (powder), and a diluent in the above proportions, and allowed to stand for 5-12 hours for degassing and degassing; the degassing and degassed casting liquid is dripped into the feed port of the feed pipe 3 through a peristaltic pump, and is initially formed into a polymer gel material under the action of water.

[0060] The composite polymer material of this embodiment has a certain mechanical strength, a certain porosity, and is uniformly mixed with graphene oxide and the like (powders). The polymer material completely wraps the inorganic powder material, presenting a three-dimensional network polymer structure wrapping the inorganic powder material. At the same time, the gaps in the three-dimensional grid structure are interconnected, and it is ensured that the inorganic powder in the composite polymer material of the present invention is not lost due to pulsating impact during use. At the same time, due to the pores of the composite polymer material of the present invention, it has capillary and adsorption capabilities.

[0061] This composite polymer material is composed of an organic phase and an inorganic phase. The main function of the organic phase is reflected by the polymer material, that is, forming a three-dimensional network polymer structure and a polymer formed body with a certain pore size on the surface. The inorganic phase components are embedded in the three-dimensional network polymer structure to achieve the adsorption function, replacing the ion selection function that conventional organic ion exchange resins cannot adsorb and separate. Compared with the composite polymer materials of the prior art, the effect is better.

[0062] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are the same or similar to the present invention fall within the protection scope of the present invention.

[0063] The parts not specifically described in the above embodiments belong to well-known components and common structures or common means in the technical field, and will not be described in detail here.

Claims

1. A device for preparing a granular polymer adsorption material, characterized in that: The device comprises a liquid dripping component, a phase separation component, a nanofiltration component and a cleaning component. The nanofiltration component and the cleaning component are respectively arranged at the front and rear ends of the phase separation component and are both connected to the phase separation component. The liquid dripping component is arranged above the feed pipe (3) of the phase separation component. The drip assembly comprises a drip tube (1) and a hot air tube (2); the drip tube (1) is arranged in the hot air tube (2), and a gap is left between the drip tube (1) and the hot air tube (2), wherein the gap is 1 to 0.2 times the diameter of the drip tube (1); the hot air tube (2) is longer than the drip tube (1), wherein the portion of the hot air tube (2) longer than the drip tube (1) is 3 to 0.15 times the diameter of the drip tube (1); a water outlet plate with evenly distributed holes is arranged at the liquid outlet of the drip tube (1); The phase separation component comprises a shell (5), a support frame (7), a roller (4) and a coagulation water tank (10); the roller (4) is tiltedly arranged on the support frame (7) through the shell (5), and a certain gap is provided between the shell (5) and the roller (4), so that the roller (4) can rotate freely in the shell (5); a feed pipe (3) with an upward opening is provided at the higher end of the roller (4), and a trumpet-shaped discharge port is provided at the lower end; a first water pump (8) is provided on one side of the support frame (7), and the first water pump ( 8) is connected to the feed pipe (3) through a pipeline, and a collecting pipe (9) is arranged on the other side of the support frame (7), and the collecting port of the collecting pipe (9) is located below the trumpet-shaped discharge port; the support frame (7), the first water pump (8) and the collecting pipe (9) are all arranged in the coagulation water tank (10), and the collecting pipe (9) is connected to the cleaning component through the discharge port on one side of the coagulation water tank (10); the drum (4) and the outer shell (5) are both partially arranged in the coagulation water tank (10); and the drum (4) is covered with sieve holes.

2. The device for preparing a granular polymer adsorption material according to claim 1, characterized in that: The nanofiltration component comprises a nanofiltration device (15) and a backwash pump (16); one end of the backwash pump (16) is connected to a backwash water pipeline, and the other end is connected to the nanofiltration device (15) via a three-way valve (18); the nanofiltration device (15) is connected to the coagulation water tank (10) of the phase separation component via the water production outlet of the three-way valve (18).

3. The device for preparing a granular polymer adsorption material according to claim 1, characterized in that: The cleaning component comprises a cleaning water tank (11) with a cover plate and a stirrer (12), wherein the driving part of the stirrer (12) is arranged on the cover plate, and the stirring part of the stirrer (12) is arranged in the cleaning water tank (11); a filter plate (17) is arranged transversely at the lower end of the cleaning water tank (11); a discharge port is arranged at the bottom of the cleaning water tank (11), and the discharge port is respectively connected to a second water pump (13) and a washing liquid discharge pipeline, and the other end of the second water pump (13) is connected to the coagulation water tank (10) of the phase separation component; a cleaning liquid water inlet and a receiving port are arranged at the upper end of the cleaning water tank (11), and the receiving port is connected to the discharge port on one side of the coagulation water tank (10) through a pipeline; and a gel discharge port is arranged in the cleaning water tank (11) above the filter plate (17).

4. The method for preparing a granular polymer adsorption material preparation device according to claim 3, characterized in that: The method comprises at least the following steps: 1) placing a support frame (7) and a first water pump (8) in a coagulation liquid in a coagulation water tank (10), and partially placing a roller (4) obliquely arranged on the support frame (7) in the coagulation liquid in the coagulation water tank (10); 2) turning on the motor (6) and the first water pump (8) to start working, the motor (6) meshing with the meshing teeth on the roller (4) through the chain (4-1) to drive the roller (4) to rotate slowly; 3) The first water pump (8) pumps the coagulation liquid in the coagulation water tank (10) into the feed pipe (3), and at the same time, the casting liquid is dripped into the feed pipe (3) through the dripping pipe. After the casting liquid contacts the coagulation liquid at the feed port of the feed pipe (3), it quickly separates into phases and fully contacts the coagulation liquid in the drum (4). Under the action of gravity, the phases are separated and formed, and then discharged into the collection pipe (9) through the trumpet-shaped discharge port of the drum (4), and then enters the cleaning water tank (11) through the collection pipe (9). The gel particles are cleaned by stirring at a certain speed through the mixer (12), and the washing liquid after cleaning is discharged; the cleaned gel particles are discharged through the gel discharge port.

5. The preparation method according to claim 4, characterized in that: The coagulation liquid is a mixture of one or more of water, an aqueous solution of dimethylacetamide, and N,N-dimethylformamide.

6. The preparation method according to claim 4, characterized in that: The casting solution is prepared from polyvinylidene fluoride, dimethylacetamide, a porogen, graphene oxide and a diluent in a mass ratio of 7:1:1:1:3.

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