Continuous extraction device for preparing hollow fiber membrane

Abstract

The invention belongs to the technical field of hollow fiber membranes, and particularly relates to a continuous extraction device for preparing hollow fiber membranes, comprising: a second extraction box fixedly connected with a first extraction box through a communicating pipe; the three sealing boxes are respectively communicated and fixedly connected to the first extraction box and the second extraction box; the treatment box is arranged on one side of the sealing box; a processing unit; through cooperation of a water spraying pipe, a fan and an ultraviolet lamp tube, the hollow fiber membrane is cleaned and a surface organic solvent is flushed in the process that the hollow fiber membrane passes through the water spraying pipe and a spray head, and in the cleaning process, a water pump is started to enable water in a water tank to pass through a three-way pipe, a connecting pipe and the water spraying pipe, and finally the water is sprayed on the hollow fiber membrane through the spray head; then drying the hollow fiber membrane through a fan to remove moisture and a solvent in the hollow fiber membrane; and the dried hollow fiber membrane is sterilized by an ultraviolet lamp tube, so that the hollow fiber membrane is prevented from being polluted by microorganisms in the use process.

Description

Technical Field

[0001] The invention belongs to the technical field of hollow fiber membranes, in particular to a continuous extraction device for preparing hollow fiber membranes. Background Art

[0002] The thermo-induced phase method is usually used in the preparation of hollow fiber membranes. The thermo-induced phase method is to mix a polymer with a high-boiling point, low-molecular-weight liquid oil plasticizer to form a homogeneous solution at high temperature; during spinning, after passing through an air bath, it enters a low-temperature coagulation bath, and the system undergoes solid-liquid phase separation or liquid-liquid phase separation to form a two-phase structure with the polymer as the continuous phase and the plasticizer as the dispersed phase; the plasticizer is then extracted in an extraction bath; finally, the extractant is removed to obtain a finished hollow fiber separation membrane.

[0003] A Chinese patent with publication number CN113046846A discloses a continuous extraction device for preparing hollow fiber membranes, including a membrane filament introduction machine, a membrane filament exporting machine and at least one extraction tank located therebetween, wherein the membrane filament introduction machine includes a raw filament receiving tank and a first guide roller installed above the raw filament receiving tank; the raw filament receiving tank is filled with nascent hollow fiber membrane filaments; the membrane filament exporting machine includes an extraction receiving tank and a second guide roller installed above the extraction receiving tank; the extraction receiving tank is used to collect the hollow fiber membrane filaments exported by the second guide roller after extraction; the extraction tank includes an extraction tank body, a tank cover, a steel beam, a third guide roller, a passive guide wheel and its bracket, the membrane filaments move back and forth in sequence under the action of the third guide roller and the passive guide wheel in the extraction tank, fully contact with the extractant, complete the replacement of the oily plasticizer and the volatile extractant in the membrane filaments, extend the extraction time in a limited space, and improve the extraction effect.

[0004] In the above technology, after the extraction process is completed, the surface of the hollow fiber membrane may contain a certain amount of moisture or solvent. If these residues are not cleaned in time, they may affect the performance and stability of the membrane, resulting in poor extraction effect and limiting the service life of the membrane.

[0005] To this end, the present invention provides a continuous extraction device for preparing hollow fiber membranes. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a continuous extraction device for preparing a hollow fiber membrane according to the present invention comprises:

[0008] The second extraction box is connected and fixedly connected to the first extraction box through a connecting pipe;

[0009] There are three sealing boxes, which are respectively connected and fixed to the first extraction box and the second extraction box;

[0010] A processing box, arranged on one side of the sealing box;

[0011] a processing unit for cleaning, drying and sterilizing the hollow fiber membranes;

[0012] The processing unit includes a water spray pipe, a fan and an ultraviolet lamp;

[0013] There are two water spray pipes, which are respectively arranged on both sides of the hollow fiber membrane. A plurality of spray heads are connected and fixed to the water spray pipes.

[0014] The treatment box is rotatably connected to two connecting pipes via bearings, one end of each connecting pipe is connected and fixed to the water spray pipe, and the other end of each connecting pipe is rotatably connected to a three-way pipe;

[0015] The top of the treatment box is fixedly connected with a water tank, and one end of the three-way pipe is connected and fixedly connected with the treatment box; a water pump is installed on the three-way pipe;

[0016] There are two fans, one of which is installed on the top inner wall of the processing box, and the other is installed on the side wall of the processing box through a mounting plate;

[0017] The ultraviolet lamp tubes are provided in plurality and are respectively arranged in two groups, wherein one group of ultraviolet lamp tubes is installed on the top inner wall of the processing box, and the other group of ultraviolet lamp tubes is installed on the mounting plate;

[0018] A control valve is installed on the connecting pipe; and impellers are fixedly connected to the inner walls of the bottoms of the first extraction box and the second extraction box.

[0019] Preferably, gears are fixedly connected to the connecting pipes, an electric push rod is fixedly connected to the outer wall of the processing box, the output end of the electric push rod is connected to a rack through a fixed block, and the rack is respectively meshed with two gears.

[0020] Preferably, a conveying mechanism is provided in both the first extraction box and the second extraction box, and the two conveying mechanisms have the same structure; the conveying mechanism comprises a plurality of upper guide rollers and a lower guide roller, and the upper guide rollers and the lower guide rollers are rotatably connected to the first extraction box through roller shafts; a plurality of limit grooves are provided on the upper guide roller; a plurality of hollow fiber membranes are provided, and are sequentially wound around the upper guide roller and the lower guide roller in an inverted triangle shape; one end of the upper guide roller is extended and fixedly connected with a first sprocket, and a first chain is sleeved on the outer side of the plurality of the first sprockets; a first motor is provided at one end of one of the upper guide rollers.

[0021] Preferably, a swing mechanism is provided in both the first extraction box and the second extraction box; the swing mechanism comprises two sliding rods fixedly connected to the inner wall of the first extraction box, each of the sliding rods being slidably connected to a frame, a plurality of connecting rods being rotatably connected between the two frames, a connecting block being fixedly connected to one of the frames, a sliding groove being provided on the side wall of the connecting block away from the frame; a driving motor is fixedly connected to the outer wall of the first extraction box, an output shaft of the driving motor being rotatably connected to the first extraction box via a bearing, and being fixedly connected to a rotating rod, a rotating shaft being rotatably connected to the rotating rod, and the rotating shaft sliding in the sliding groove.

[0022] Preferably, a plurality of first guide rollers are rotatably connected to the inner wall at the top end of the processing box, and a second guide roller is rotatably connected to the inner wall at the bottom end of the processing box; the second guide roller and the two adjacent first guide rollers above are in an inverted cone shape; one end of each of the first guide rollers extends to the outside of the processing box and is fixedly connected to a second sprocket; a second chain is sleeved on the outer side of the plurality of second sprockets; and a second motor is provided at one end of one of the first guide rollers.

[0023] Preferably, three protection rods are rotatably connected in the sealing box via bearings, and the three protection rods are inverted triangles; the top side walls of the sealing box are connected and fixedly connected to a water inlet pipe, and the bottom of the sealing box is connected and fixedly connected to a drainage pipe.

[0024] Preferably, a membrane thread introduction machine is provided on one side of the first extraction box, and three unwinding shafts are rotatably connected to the membrane thread introduction machine.

[0025] Preferably, a membrane filament outlet machine is provided on one side of the first extraction box, and three winding shafts are rotatably connected to the membrane filament outlet machine.

[0026] Preferably, the top of the first extraction box is connected and fixedly connected to a first exhaust pipe, on which a first fan is installed; the top of the second extraction box is connected and fixedly connected to a second exhaust pipe, on which a second fan is installed; the first exhaust pipe is connected to the second exhaust pipe; the top of the second extraction box is fixedly connected to a condensation box, and one end of the second exhaust pipe is connected and fixedly connected to the condensation box.

[0027] Preferably, the second extraction box is connected and fixedly connected with an extractant input pipe; the side wall of the first extraction box is connected and fixedly connected with a discharge pipe, and the bottom of the discharge pipe is connected and fixedly connected with a collection box.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1. A continuous extraction device for preparing hollow fiber membranes according to the present invention, through the cooperation of a water spray pipe, a fan and an ultraviolet lamp, the hollow fiber membrane is cleaned and the surface organic solvent is rinsed during the process of the hollow fiber membrane passing through the water spray pipe and the nozzle. During the cleaning process, the water pump is turned on, and the water in the water tank passes through the three-way pipe, the connecting pipe and the water spray pipe, and finally sprays on the hollow fiber membrane through the nozzle. During the spraying, the electric push rod is turned on, and the output end of the electric push rod drives the rack to move through the fixed block, the rack drives the gear to reciprocate, the gear drives the connecting pipe to rotate, and the water spray pipe and the nozzle are driven to rotate through the connecting pipe. The rotation of the nozzle expands the spraying area; then the hollow fiber membrane is dried by the fan to remove the moisture and solvent therein; the dried hollow fiber membrane is sterilized by the ultraviolet lamp to ensure that the hollow fiber membrane will not be contaminated by microorganisms during use.

[0030] 2. A continuous extraction device for preparing hollow fiber membranes described in the present invention, through the cooperation of a connecting rod, a connecting block and a rotating rod, when the hollow fiber membrane is relaxed, the driving motor is turned on, and the driving motor drives the rotating rod to rotate through the output shaft, and the rotating shaft is driven to rotate through the rotating rod. The rotating shaft presses the connecting block during the rotation process, thereby pushing the connecting block to reciprocate, and the frame is driven to reciprocate through the connecting block, and the connecting rod is driven to reciprocate through the frame. The connecting rod drives the hollow fiber membrane to reciprocate and shake in the extractant, thereby accelerating the contact between the hollow fiber membrane and the extractant, facilitating the full reaction of the hollow fiber membrane and the extractant, and improving the extraction efficiency.

[0031] 3. The continuous extraction device for preparing hollow fiber membranes described in the present invention is characterized in that a sealing box is provided and water is injected from a water inlet pipe. When the water level reaches 1 / 2 to 2 / 3 of the height of the sealing box, the middle part of the sealing box is completely submerged, so that the volatilization of the extractant is blocked and absorbed by the water, thereby completing the sealing of the volatile gas and preventing the leakage of the volatile gas in the extractant. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Figure 1 is a first stereogram of the present invention;

[0034] Figure 2 is a second stereogram of the present invention;

[0035] Figure 3 is a cross-sectional view of the present invention;

[0036] Figure 4 It is a schematic structural diagram of the upper guide roller and the lower guide roller in the present invention;

[0037] Figure 5 It is a structural schematic diagram of the connecting rod in the present invention;

[0038] Figure 6 It is a structural schematic diagram of the water spray pipe in the present invention;

[0039] Figure 7 It is a structural schematic diagram of the processing box in the present invention;

[0040] Figure 8 is a cross-sectional view of the sealing box in the present invention;

[0041] In the figure: 1, first extraction box; 11, upper guide roller; 12, lower guide roller; 13, first sprocket; 14, first chain; 15, first exhaust pipe; 16, first fan; 17, collection box; 18, discharge pipe; 19, limit groove; 2, second extraction box; 21, second exhaust pipe; 22, second fan; 23, condensation box; 24, connecting pipe; 25, extractant input pipe; 3, treatment box; 31, water tank; 32, water pump; 33, three-way pipe; 34, electric push rod; 35, rack; 3 6. Gear; 37. Connecting pipe; 38. Water spray pipe; 39. Nozzle; 310. First guide roller; 311. Second guide roller; 312. UV lamp; 313. Fan; 4. Film thread introduction machine; 41. Unwinding shaft; 5. Film thread exporting machine; 51. Rewinding shaft; 6. Driving motor; 61. Frame; 62. Connecting rod; 63. Sliding rod; 64. Connecting block; 65. Slide; 66. Rotating rod; 67. Rotating shaft; 7. Sealing box; 71. Water inlet pipe; 72. Protective rod; 73. Drain pipe. DETAILED DESCRIPTION

[0042] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0043] like Figures 1 to 8As shown, a continuous extraction device for preparing hollow fiber membranes according to an embodiment of the present invention comprises: a second extraction box 2, connected and fixedly connected to the first extraction box 1 through a connecting pipe 24; three sealing boxes 7 are provided, which are connected and fixedly connected to the first extraction box 1 and the second extraction box 2 respectively; a processing box 3 is arranged on one side of the sealing box 7; a processing unit is used for cleaning, drying and sterilizing the hollow fiber membrane; the processing unit comprises a water spray pipe 38, a fan 313 and an ultraviolet lamp 312; the water spray pipe 38 is provided with two, which are arranged on both sides of the hollow fiber membrane respectively, and a plurality of nozzles 39 are connected and fixedly connected to the water spray pipe 38, and two connecting pipes 37 are rotatably connected to the processing box 3 through a bearing, and one end of each connecting pipe 37 is connected and fixedly connected to the water spray pipe 38. The other end of the connecting pipe 37 is rotatably connected to a three-way pipe 33; a water tank 31 is fixedly connected to the top of the processing box 3, and one end of the three-way pipe 33 is connected and fixed to the processing box 3; a water pump 32 is installed on the three-way pipe 33; two fans 313 are provided, one of which is installed on the top inner wall of the processing box 3, and the other fan 313 is installed on the side wall of the processing box 3 through a mounting plate; a plurality of ultraviolet lamp tubes 312 are provided, which are respectively set as two groups, one group of ultraviolet lamp tubes 312 is installed on the top inner wall of the processing box 3, and the other group of ultraviolet lamp tubes 312 is installed on the mounting plate; a control valve is installed on the connecting pipe 24; impellers are fixedly connected to the bottom inner walls of the first extraction box 1 and the second extraction box 2.

[0044] In the hollow fiber membrane extraction process, the solution placed in the first extraction box 1 and the second extraction box 2 is an organic extraction solvent. By setting the first extraction box 1 and the second extraction box 2, the contact time and contact area between the hollow fiber membrane and the extractant can be increased, thereby improving the extraction efficiency. In the first extraction box 1, the hollow fiber membrane is initially in contact with the extractant for preliminary extraction; while in the second extraction box 2, a deeper extraction can be performed to ensure that impurities are fully removed. The first extraction box 1 and the second extraction box 2 can realize the continuity of the production process, reduce downtime and production cycle, and thus improve production efficiency; by setting the sealing box 7, the leakage of the volatile extractant can be effectively reduced, thereby protecting the environment and the safety of operators; by setting the connecting pipe 24 and the control valve, the flow rate and flow velocity of the extractant can be adjusted as needed to optimize the extraction process;

[0045] After the extraction process is completed, the surface of the hollow fiber membrane may contain a certain amount of moisture or solvent. If these residues are not cleaned in time, the performance and stability of the membrane may be affected, resulting in poor extraction effect. When the processing unit provided by the present invention is in use, the extracted hollow fiber membrane is transported to the processing box 3; during the process of the hollow fiber membrane passing through the water spray pipe 38 and the nozzle 39, the hollow fiber membrane is cleaned, the surface organic solvent is rinsed, and then the hollow fiber membrane is dried by the fan 313 to remove the moisture and solvent therein; the dried hollow fiber membrane is sterilized by the ultraviolet lamp 312 to ensure that the hollow fiber membrane will not be contaminated by microorganisms during use;

[0046] By providing an impeller, the extractant in the second extraction box 2 is accelerated to flow into the first extraction box 1 through the connecting pipe 24 .

[0047] like Figure 6 As shown, the connecting pipe 37 is fixedly connected with a gear 36, the outer wall of the processing box 3 is fixedly connected with an electric push rod 34, the output end of the electric push rod 34 is connected with a rack 35 through a fixed block, and the rack 35 is respectively engaged with two gears 36.

[0048] When the gear 36 and the rack 35 provided by the present invention are in use, during the cleaning process, the water pump 32 is turned on, and the water pump 32 passes the water in the water tank 31 through the three-way pipe 33, the connecting pipe 37 and the water spray pipe 38, and finally sprays it on the hollow fiber membrane through the nozzle 39. During spraying, the electric push rod 34 is turned on, and the output end of the electric push rod 34 drives the rack 35 to move through the fixed block, and the rack 35 drives the gear 36 to rotate back and forth, and the gear 36 drives the connecting pipe 37 to rotate, and the water spray pipe 38 and the nozzle 39 are driven to rotate through the connecting pipe 37. The rotation of the nozzle 39 expands the spraying area and improves the cleaning effect of the hollow fiber membrane.

[0049] like Figure 3 and Figure 4 As shown, both the first extraction box 1 and the second extraction box 2 are provided with a conveying mechanism, and the structures of the two conveying mechanisms are the same; the conveying mechanism includes a plurality of upper guide rollers 11 and a lower guide roller 12, and the upper guide rollers 11 and the lower guide rollers 12 are rotatably connected to the first extraction box 1 through roller shafts; a plurality of limiting grooves 19 are provided on the upper guide roller 11; a plurality of hollow fiber membranes are provided, and are sequentially wound on the upper guide roller 11 and the lower guide roller 12, forming an inverted triangle; one end of the upper guide roller 11 is extended and fixedly connected with a first sprocket 13, and a first chain 14 is sleeved on the outer side of the plurality of first sprockets 13; a first motor is provided at one end of one of the upper guide rollers 11.

[0050] When the conveying mechanism provided by the present invention is used, during the conveying process, by turning on the first motor, the first motor drives the connected upper guide roller 11 to rotate through the output shaft, drives the connected first sprocket 13 to rotate through the upper guide roller 11, drives the first chain 14 to rotate through the first sprocket 13, drives the other sprockets to rotate through the first chain 14, and drives the connected upper guide roller 11 to rotate through the other sprockets, thereby realizing the conveying of the hollow fiber membrane, wherein the upper guide roller 11 is provided with a limiting groove 19 to limit the hollow fiber membrane and prevent it from being entangled during the conveying process; wherein the first extraction box 1 and the second extraction box 2 are both provided with a conveying mechanism, and the two conveying mechanisms have the same structure and are both used to convey the hollow fiber membrane; wherein the rotation speed of the first motor in the two conveying mechanisms can be set differently, when the rotation speed in the first extraction box 1 is faster than that in the second extraction box 2, the hollow fiber membrane in the first extraction box 1 is relaxed; when the rotation speed in the second extraction box 2 is faster than that in the processing box 3, the hollow fiber membrane in the second extraction box 2 is relaxed; by controlling the relaxation of the hollow fiber membrane, it is convenient for swinging processing.

[0051] like Figure 3 and Figure 5 As shown, both the first extraction box 1 and the second extraction box 2 are provided with a swing mechanism; the swing mechanism includes two sliding rods 63 fixedly connected to the inner wall of the first extraction box 1, and the sliding rods 63 are slidably connected to the frames 61, and a plurality of connecting rods 62 are rotatably connected between the two frames 61, and a connecting block 64 is fixedly connected to one of the frames 61, and a sliding groove 65 is provided on the side wall of the connecting block 64 away from the frame 61; a driving motor 6 is fixedly connected to the outer wall of the first extraction box 1, and the output shaft of the driving motor 6 is rotatably connected to the first extraction box 1 through a bearing, and is fixedly connected to a rotating rod 66, and a rotating shaft 67 is rotatably connected to the rotating rod 66, and the rotating shaft 67 slides in the sliding groove 65.

[0052] When the swing mechanism provided by the present invention is in use, in order to increase the contact and reaction between the hollow fiber membrane and the extractant, the hollow fiber membrane needs to be shaken to fully contact with the extractant; when the hollow fiber membrane is relaxed, the drive motor 6 is turned on, and the drive motor 6 drives the rotating rod 66 to rotate through the output shaft, and drives the rotating shaft 67 to rotate through the rotating rod 66. The rotating shaft 67 presses the connecting block 64 during the rotation process, thereby pushing the connecting block 64 to reciprocate, and the frame 61 is driven to reciprocate through the connecting block 64, and the connecting rod 62 is driven to reciprocate through the frame 61. The connecting rod 62 drives the hollow fiber membrane to reciprocate and shake in the extractant, thereby accelerating the contact between the hollow fiber membrane and the extractant, facilitating the full reaction of the hollow fiber membrane and the extractant, and improving the extraction efficiency.

[0053] like Figure 3 and Figure 7As shown, a plurality of first guide rollers 310 are rotatably connected to the inner wall at the top end of the processing box 3, and a second guide roller 311 is rotatably connected to the inner wall at the bottom end of the processing box 3; the second guide roller 311 and the two adjacent first guide rollers 310 above are in an inverted cone shape; one end of the first guide roller 310 extends to the outside of the processing box 3 and is fixedly connected to a second sprocket; a second chain is sleeved on the outer side of the plurality of second sprockets; and a second motor is provided at one end of one of the first guide rollers 310.

[0054] When the first guide roller 310 and the second guide roller 311 provided by the present invention are in use, by turning on the second motor, the connected first guide roller 310 is driven to rotate by the output shaft of the second motor, the connected second sprocket is driven to rotate by the first guide roller 310, the second chain is driven to rotate by the second sprocket, the other second sprockets are driven to rotate by the second chain, and the first guide roller 310 is driven to rotate by the other second sprockets, thereby completing the transportation of the hollow fiber membrane in the processing box 3.

[0055] like Figure 8 As shown, three protection rods 72 are rotatably connected in the sealing box 7 through bearings, and the three protection rods 72 are inverted triangles; the top side walls of the sealing box 7 are connected and fixedly connected with a water inlet pipe 71, and the bottom of the sealing box 7 is connected and fixedly connected with a drainage pipe 73.

[0056] When the sealed box 7 provided by the present invention is in use, water is injected from the water inlet pipe 71. When the water level reaches 1 / 2 to 2 / 3 of the height of the sealed box 7, the middle part of the sealed box 7 is completely submerged, so that the volatilization of the extractant is blocked and absorbed by the water, thereby completing the sealing of the volatile gas and preventing the leakage of the volatile gas in the extractant.

[0057] like Figure 1 to Figure 2 As shown, a membrane thread introduction machine 4 is provided on one side of the first extraction box 1, and three unwinding shafts 41 are rotatably connected to the membrane thread introduction machine 4; a membrane thread exporting machine 5 is provided on one side of the first extraction box 1, and three winding shafts 51 are rotatably connected to the membrane thread exporting machine 5.

[0058] When the membrane filament introduction machine 4 and the membrane filament exporting machine 5 provided by the present invention are in use, the membrane filament introduction machine 4 is turned on to allow the hollow fiber membrane to be transported from the unwinding shaft 41, the upper guide roller 11, the lower guide roller 12, the first guide roller 310 and the second guide roller 311, and the membrane filament exporting machine 5 is turned on to allow the hollow fiber membrane to be collected from the winding shaft 51, thereby achieving continuity in the preparation of the hollow fiber membrane.

[0059] like Figure 2 and Figure 3As shown, the top of the first extraction box 1 is connected and fixedly connected with a first exhaust pipe 15, and a first fan 16 is installed on the first exhaust pipe 15; the top of the second extraction box 2 is connected and fixedly connected with a second exhaust pipe 21, and a second fan 22 is installed on the second exhaust pipe 21; the first exhaust pipe 15 is connected to the second exhaust pipe 21; the top of the second extraction box 2 is fixedly connected with a condensation box 23, and one end of the second exhaust pipe 21 is connected and fixedly connected to the condensation box 23.

[0060] When the first exhaust pipe 15 and the second exhaust pipe 21 provided by the present invention are in use, the first fan 16 and the second fan 22 are turned on during extraction, and the gas volatilized in the first extraction box 1 is discharged through the first exhaust pipe 15 under the action of the first fan 16; the gas volatilized in the second extraction box 2 is discharged through the second exhaust pipe 21 under the action of the second fan 22, and finally enters the condensation box 23 to condense and liquefy into water droplets for discharge.

[0061] like Figure 1 As shown, the second extraction box 2 is connected and fixedly connected with an extractant input pipe 25; the side wall of the first extraction box 1 is connected and fixedly connected with a discharge pipe 18, and the bottom of the discharge pipe 18 is connected and fixedly connected with a collection box 17.

[0062] When the extractant input pipe 25 provided by the present invention is in use, during the extraction process, the extractant is continuously pumped into the second extraction box 2 through the extractant input pipe 25, and the extractant in the second extraction box 2 enters the first extraction box 1 through the connecting pipe 24. When the extractant liquid level in the first extraction box 1 is higher than the discharge pipe 18, the extraction mixture flows out from the discharge pipe 18 to the collection box 17, thereby improving the use efficiency of the extractant.

[0063] Working principle: During the hollow fiber membrane extraction process, the solution placed in the first extraction box 1 and the second extraction box 2 is an organic extraction solvent. By setting the first extraction box 1 and the second extraction box 2, the contact time and contact area between the hollow fiber membrane and the extractant can be increased, thereby improving the extraction efficiency. In the first extraction box 1, the hollow fiber membrane is initially in contact with the extractant for preliminary extraction; while in the second extraction box 2, a deeper extraction can be performed to ensure that impurities are fully removed. The first extraction box 1 and the second extraction box 2 can realize the continuity of the production process, reduce downtime and production cycle, and thus improve production efficiency; by setting the sealing box 7, the leakage of the volatile extractant can be effectively reduced, thereby protecting the environment and the safety of operators; by setting the connecting pipe 24 and the control valve, the flow rate and flow velocity of the extractant can be adjusted as needed to optimize the extraction process;

[0064] The extracted hollow fiber membrane is transported to the processing box 3; during the process of the hollow fiber membrane passing through the water spray pipe 38 and the nozzle 39, the hollow fiber membrane is cleaned and the surface organic solvent is rinsed. During the cleaning process, the water pump 32 is turned on, and the water pump 32 wants the water in the water tank 31 to pass through the three-way pipe 33, the connecting pipe 37 and the water spray pipe 38, and finally sprayed on the hollow fiber membrane through the nozzle 39. When spraying, the electric push rod 34 is turned on, and the output end of the electric push rod 34 drives the rack 35 to move through the fixed block, and the rack 35 drives the gear 36 to reciprocate, and the gear 36 drives the connecting pipe 37 to rotate, and the water spray pipe 38 and the nozzle 39 are driven to rotate through the connecting pipe 37. The nozzle 39 rotates to expand the spraying area; then the hollow fiber membrane is dried by the fan 313 to remove the moisture and solvent therein; the dried hollow fiber membrane is sterilized by the ultraviolet lamp 312 to ensure that the hollow fiber membrane will not be contaminated by microorganisms during use;

[0065] When the hollow fiber membrane is relaxed, the driving motor 6 is turned on, and the driving motor 6 drives the rotating rod 66 to rotate through the output shaft, and drives the rotating shaft 67 to rotate through the rotating rod 66. The rotating shaft 67 presses the connecting block 64 during the rotation process, thereby pushing the connecting block 64 to reciprocate, and the frame 61 is driven to reciprocate through the connecting block 64, and the connecting rod 62 is driven to reciprocate through the frame 61. The connecting rod 62 drives the hollow fiber membrane to reciprocate and shake in the extractant, thereby accelerating the contact between the hollow fiber membrane and the extractant, facilitating the full reaction of the hollow fiber membrane and the extractant, and improving the extraction efficiency;

[0066] Water is injected into the water inlet pipe 71. When the water level reaches 1 / 2 to 2 / 3 of the height of the sealing box 7, the middle part of the sealing box 7 is completely submerged, so that the volatilization of the extractant is blocked and absorbed by the water, thereby completing the sealing of the volatile gas and preventing the leakage of the volatile gas in the extractant.

[0067] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A continuous extraction device for preparing a hollow fiber membrane, comprising: A first extraction box (1); The second extraction box (2) is connected and fixedly coupled to the first extraction box (1) via a connecting pipe (24); Three sealing boxes (7) are provided, which are respectively connected and fixed to the first extraction box (1) and the second extraction box (2); A processing box (3) is arranged on one side of the sealing box (7); a processing unit for cleaning, drying and sterilizing the hollow fiber membranes; Features: The processing unit comprises a water spray pipe (38), a fan (313) and an ultraviolet lamp tube (312); There are two water spray pipes (38), which are respectively arranged on both sides of the hollow fiber membrane. A plurality of spray heads (39) are connected and fixed to the water spray pipes (38). The treatment box (3) is rotatably connected to two connecting pipes (37) via bearings, one end of each connecting pipe (37) is connected and fixed to a water spray pipe (38), and the other end of each connecting pipe (37) is rotatably connected to a three-way pipe (33); A water tank (31) is fixedly connected to the top of the treatment box (3); one end of the three-way pipe (33) is connected and fixedly connected to the treatment box (3); a water pump (32) is installed on the three-way pipe (33); Two fans (313) are provided, one of which is mounted on the top inner wall of the processing box (3), and the other fan (313) is mounted on the side wall of the processing box (3) via a mounting plate; The ultraviolet lamp tubes (312) are provided in plurality and are arranged in two groups, wherein one group of the ultraviolet lamp tubes (312) is installed on the top inner wall of the processing box (3), and the other group of the ultraviolet lamp tubes (312) is installed on the mounting plate; A control valve is installed on the connecting pipe (24); and impellers are fixedly connected to the inner walls of the bottoms of the first extraction box (1) and the second extraction box (2).

2. A continuous extraction device for preparing hollow fiber membranes according to claim 1, characterized in that: The connecting pipe (37) is fixedly connected with a gear (36), the outer wall of the processing box (3) is fixedly connected with an electric push rod (34), the output end of the electric push rod (34) is connected with a rack (35) through a fixed block, and the rack (35) is respectively meshed with two gears (36).

3. A continuous extraction device for preparing hollow fiber membrane according to claim 2, characterized in that: The first extraction box (1) and the second extraction box (2) are both provided with a transmission mechanism, and the two transmission mechanisms have the same structure; the transmission mechanism comprises a plurality of upper guide rollers (11) and lower guide rollers (12), and the upper guide rollers (11) and the lower guide rollers (12) are both rotatably connected to the first extraction box (1) via roller shafts; a plurality of limit grooves (19) are provided on the upper guide roller (11); a plurality of hollow fiber membranes are provided, and are sequentially wound around the upper guide roller (11) and the lower guide roller (12), forming an inverted triangle; one end of each of the upper guide rollers (11) is extended and fixedly connected with a first sprocket (13), and a first chain (14) is sleeved on the outer side of the plurality of first sprockets (13); a first motor is provided at one end of one of the upper guide rollers (11).

4. A continuous extraction device for preparing hollow fiber membranes according to claim 3, characterized in that: The first extraction box (1) and the second extraction box (2) are both provided with a swing mechanism; the swing mechanism comprises two sliding rods (63) fixedly connected to the inner wall of the first extraction box (1); the sliding rods (63) are both slidably connected to a frame (61); a plurality of connecting rods (62) are rotatably connected between the two frames (61); a connecting block (64) is fixedly connected to one of the frames (61); a sliding groove (65) is provided on the side wall of the connecting block (64) away from the frame (61); a driving motor (6) is fixedly connected to the outer wall of the first extraction box (1); the output shaft of the driving motor (6) is rotatably connected to the first extraction box (1) through a bearing and is fixedly connected to a rotating rod (66); a rotating shaft (67) is rotatably connected to the rotating rod (66); the rotating shaft (67) slides in the sliding groove (65).

5. A continuous extraction device for preparing hollow fiber membranes according to claim 4, characterized in that: A plurality of first guide rollers (310) are rotatably connected to the inner wall at the top end of the processing box (3), and a second guide roller (311) is rotatably connected to the inner wall at the bottom end of the processing box (3); the second guide roller (311) and the two first guide rollers (310) adjacent to the upper side are in an inverted cone shape; one end of each of the first guide rollers (310) extends to the outside of the processing box (3) and is fixedly connected to a second sprocket; a second chain is sleeved on the outer side of the plurality of second sprockets; and a second motor is provided at one end of one of the first guide rollers (310).

6. A continuous extraction device for preparing hollow fiber membranes according to claim 5, characterized in that: Three protective rods (72) are rotatably connected in the sealing box (7) via bearings, and the three protective rods (72) are inverted triangles; the top side walls of the sealing box (7) are connected and fixedly connected to a water inlet pipe (71), and the bottom of the sealing box (7) is connected and fixedly connected to a drainage pipe (73).

7. A continuous extraction device for preparing hollow fiber membranes according to claim 6, characterized in that: A membrane thread introduction machine (4) is provided on one side of the first extraction box (1), and three unwinding shafts (41) are rotatably connected to the membrane thread introduction machine (4).

8. A continuous extraction device for preparing hollow fiber membranes according to claim 7, characterized in that: A membrane thread outlet machine (5) is provided on one side of the first extraction box (1), and three winding shafts (51) are rotatably connected to the membrane thread outlet machine (5).

9. A continuous extraction device for preparing hollow fiber membranes according to claim 8, characterized in that: The top of the first extraction box (1) is connected and fixedly connected to a first exhaust pipe (15), and a first fan (16) is installed on the first exhaust pipe (15); the top of the second extraction box (2) is connected and fixedly connected to a second exhaust pipe (21), and a second fan (22) is installed on the second exhaust pipe (21); the first exhaust pipe (15) is connected to the second exhaust pipe (21); the top of the second extraction box (2) is fixedly connected to a condensation box (23), and one end of the second exhaust pipe (21) is connected and fixedly connected to the condensation box (23).

10. A continuous extraction device for preparing hollow fiber membranes according to claim 9, characterized in that: The second extraction box (2) is connected and fixedly connected to an extractant input pipe (25); the side wall of the first extraction box (1) is connected and fixedly connected to a discharge pipe (18), and the bottom of the discharge pipe (18) is connected and fixedly connected to a collection box (17).

Images