Lignin ultraviolet modification device for hollow fiber membrane

Abstract

The utility model relates to the technical field of hollow fiber membrane modification, and discloses a hollow fiber membrane lignin ultraviolet modification device which comprises a bearing unit, the bearing unit comprises a supporting plate, an unwinding assembly, an extrusion assembly, a membrane casting assembly, an irradiation assembly, a winding assembly, a third connecting pipe and a membrane wire, and the unwinding assembly, the extrusion assembly, the membrane casting assembly, the irradiation assembly and the winding assembly are installed on the top of the supporting plate. The membrane filaments sequentially pass through the unwinding assembly, the extrusion assembly, the membrane casting assembly, the irradiation assembly and the winding assembly. The hydrophilic modification device has the beneficial effects that the bearing unit is arranged, and the extrusion assembly, the membrane casting assembly, the irradiation assembly and the winding assembly are matched with one another, so that hydrophilic modification can be more conveniently realized on membrane filaments.

Description

Technical Field

[0001] The utility model relates to the technical field of hollow fiber membrane modification, in particular to a hollow fiber membrane lignin ultraviolet modification device. Background Art

[0002] Hollow fiber membrane refers to a membrane that looks like a fiber and has a self-supporting function. Hollow fiber membrane is a fiber filament with a hollow inner cavity processed from polysulfone and dimethylacetamide as raw materials, and then divided by a high permeability polymer, which has selective permeability characteristics. Before using the hollow fiber membrane, the hollow fiber membrane needs to be modified. The commonly used modification equipment usually uses multiple tanks and corresponding modification processes for modification. In the existing technology, it is not convenient to perform hydrophilic modification on the membrane filament. Utility Model Content

[0003] Some simplifications or omissions may be made in this section and the abstract of the specification and the title of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0004] The utility model aims to provide a hollow fiber membrane lignin ultraviolet modification device, which can solve the problem of inconvenience in carrying out hydrophilic modification on membrane fibers.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a hollow fiber membrane lignin UV modification device, which includes a carrying unit, the carrying unit includes a support plate, a unwinding assembly, an extrusion assembly, a film casting assembly, an irradiation assembly and a winding assembly installed on the top of the support plate, as well as a third connecting tube and membrane filaments, and the membrane filaments pass through the unwinding assembly, the extrusion assembly, the film casting assembly, the irradiation assembly and the winding assembly in sequence.

[0006] As a preferred solution of the hollow fiber membrane lignin UV modification device of the utility model, the unwinding assembly includes a first fixed plate fixed to the top of the support plate and a first rotating rod rotating on the first fixed plate.

[0007] As a preferred solution of the hollow fiber membrane lignin UV modification device described in the utility model, the extrusion assembly includes a placement plate fixed to the top of the support plate by four support columns, an extrusion piece installed on the top of the placement plate, a pressure tank arranged on one side of the support column, and a storage tank installed under the placement plate, a first pulley is arranged on the side of the placement plate close to the unwinding assembly, and the pressure tank is connected to the storage tank through a first connecting pipe.

[0008] As a preferred solution of the hollow fiber membrane lignin UV modification device described in the utility model, the extrusion member includes two supporting plates symmetrically fixed on the side of the placement plate away from the unwinding assembly, two extrusion rollers rotating between the two supporting plates, and two meshing gears arranged on one side of the supporting plate, one side of the two gears is respectively at one end of the two extrusion rollers, one end of one of the extrusion rollers is fixedly connected to a first motor, and the first motor is installed on the top of the placement plate.

[0009] As a preferred solution of the hollow fiber membrane lignin UV modification device described in the utility model, the casting membrane assembly includes a box body installed on the top of the support plate, a liquid discharge port arranged on one side of the box body, a second pulley arranged on the top of the box body, two connecting plates fixed to the side of the box body close to the extrusion assembly, and a liquid spraying part installed on one side of the box body, the inner wall of the box body is fixedly connected to a first fixed rod, and the outer ring rotating sleeve of the first fixed rod is provided with a fourth pulley.

[0010] As a preferred solution of the hollow fiber membrane lignin UV modification device described in the utility model, the liquid spraying part includes a support bar fixed to the top of a connecting plate, a third pulley rotating on the top of the support bar, a connecting column fixed to one side of the support bar, and a cylinder fixed to one end of the connecting column, and the fourth pulley is located on the central axis of the cylinder.

[0011] As a preferred solution of the hollow fiber membrane lignin UV modification device of the utility model, wherein: a volumetric pump is installed on the other connecting plate, a second connecting pipe is fixedly connected to the volumetric pump, the second connecting pipe passes through one end of a connecting plate and is fixedly connected to a nozzle, and the nozzle is engaged with the cylinder.

[0012] As a preferred solution of the hollow fiber membrane lignin UV modification device described in the utility model, the irradiation assembly includes a support block fixed to the top of the support plate, a placement groove and two fixing holes opened on the top of the support block, an ultraviolet lamp tube placed in the placement groove, and a fixing part installed on the top of the support block, one side of the support block is fixedly connected to a second fixing rod, the outer ring of the second fixing rod is rotatably connected to a fifth pulley, and the fifth pulley is located on the central axis of the ultraviolet lamp tube.

[0013] As a preferred solution of the hollow fiber membrane lignin UV modification device described in the utility model, the fixing part includes an arc-shaped plate, a positioning hole opened at one end of the arc-shaped plate and a rotating seat rotated at one end of the arc-shaped plate, the rotating seat is fixed to the top of the support block, the positioning hole is matched with the fixing hole, and the arc-shaped plate is matched with the UV lamp tube.

[0014] As a preferred solution of the hollow fiber membrane lignin UV modification device described in the utility model, the winding assembly includes a second fixed plate fixed to the top of the support plate, a second rotating rod rotated on the second fixed plate, one side of the second fixed plate is fixedly connected to a mounting plate, a second motor is installed on the mounting plate, and one end of the second rotating rod is fixed to the output end of the second motor.

[0015] The beneficial effects of the utility model: the utility model can more conveniently achieve hydrophilic modification of membrane filaments through the arrangement of the bearing unit and the mutual cooperation among the extrusion component, the film casting component, the irradiation component and the winding component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0017] Figure 1 This is the front view of the hollow fiber membrane lignin UV modification device.

[0018] Figure 2 This is a schematic diagram of the structure of the hollow fiber membrane lignin UV modification device.

[0019] Figure 3 Schematic diagram of the structure of the extrusion component.

[0020] Figure 4 Schematic diagram of the structure of the casting membrane assembly.

[0021] Figure 5 A top view of the cast membrane assembly.

[0022] Figure 6 Exploded view of the irradiated component. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Example 1

[0027] Reference Figure 1 , which is the first embodiment of the utility model, and this embodiment provides a hollow fiber membrane lignin UV modification device, which includes a carrying unit 100, and the carrying unit 100 includes a support plate 101, a reeling assembly 102 installed on the top of the support plate 101, an extrusion assembly 103, a film casting assembly 104, an irradiation assembly 105 and a reeling assembly 106, as well as a third connecting pipe 107 and a membrane filament 108, and the membrane filament 108 passes through the reeling assembly 102, the extrusion assembly 103, the film casting assembly 104, the irradiation assembly 105 and the reeling assembly 106 in sequence.

[0028] When in use, the device is supported by the support plate 101, the unwinding component 102 can place the unmodified membrane filament 108, and the extrusion component 103 is set to realize the transportation of the membrane filament 108, and the casting liquid contained in the storage tank 103c can realize the hydrophilic modification of the membrane filament 108, and the membrane filament 108 can be squeezed by the extrusion piece 103g, so that the membrane filament 108 passing through the extrusion piece 103g is more relaxed, which is convenient for subsequent operations, and the casting liquid on the membrane filament 108 is sprayed and the casting liquid sprayed on the membrane filament 108 is assisted to form a film, and the membrane filament 108 is irradiated by the irradiation component 105 to complete the hydrophilic modification of the membrane filament 108, and the membrane filament 108 is attached. Figure 1 The arrow on the middle membrane filament 108 indicates the moving direction of the membrane filament 108 .

[0029] The casting liquid is made by mixing PVDF (polyvinylidene fluoride), DMAC (dimethylacetamide) and lignin, stirring at 75 degrees for 12 hours and then standing to degas. The ratio of PVDF polyvinylidene fluoride, DMAC dimethylacetamide and lignin is 14:85:4.

[0030] Example 2

[0031] Reference Figure 2-Figure 3 , which is the second embodiment of the utility model, and is different from the first embodiment in that: it also includes a reeling assembly 102 including a first fixed plate 102a fixed on the top of the support plate 101 and a first rotating rod 102b rotating on the first fixed plate 102a. Through the setting of the first rotating rod 102b, it can be used to support the membrane filaments 108 that need to be hydrophilically modified.

[0032] Specifically, the extrusion assembly 103 includes a placement plate 103b fixed to the top of the support plate 101 by four support columns 103a, an extrusion piece 103g installed on the top of the placement plate 103b, a pressure tank 103d arranged on one side of the support column 103a, and a storage tank 103c installed under the placement plate 103b. A first pulley 103f is provided on one side of the placement plate 103b close to the unwinding assembly 102, and the pressure tank 103d is connected to the storage tank 103c through a first connecting pipe 103e.

[0033] The storage tank 103c is used to hold the casting liquid and is used to modify the membrane filament 108. The storage tank 103c is pressurized by the pressure tank 103d and the first connecting pipe 103e, and the pressure is controlled at 3 MPa. The first pulley 103f facilitates the transmission of the membrane filament 108, making the transmission of the membrane filament 108 smoother. The casting liquid can be degassed through the storage tank 103c.

[0034] Specifically, the extrusion member 103g includes two supporting plates 103g-1 symmetrically fixed on the side of the placement plate 103b away from the unwinding assembly 102, two extrusion rollers 103g-2 rotating between the two supporting plates 103g-1, and two meshing gears 103g-3 arranged on one side of the supporting plate 103g-1, one side of the two gears 103g-3 is respectively at one end of the two extrusion rollers 103g-2, one end of one extrusion roller 103g-2 is fixedly connected to the first motor 103g-4, and the first motor 103g-4 is installed on the top of the placement plate 103b.

[0035] The rotation of the first motor 103g-4 drives the squeezing roller 103g-2 to rotate, and through the meshing setting of the two gears 103g-3, the two squeezing rollers 103g-2 can rotate in opposite directions, and the two squeezing rollers 103g-2 are almost in contact with each other, so that the membrane filament 108 can be squeezed to make the membrane filament 108 more relaxed, and the casting liquid can effectively enter the braided tube through the nozzle 104e-7, so that the membrane filament 108 has better anti-peeling strength after film formation.

[0036] Specifically, the winding assembly 106 includes a second fixed plate 106a fixed to the top of the support plate 101, and a second rotating rod 106b rotating on the second fixed plate 106a. One side of the second fixed plate 106a is fixedly connected to a mounting plate 106d, and a second motor 106c is installed on the mounting plate 106d. One end of the second rotating rod 106b is fixed to the output end of the second motor 106c. When the second motor 106c is turned on, the rotation of the second motor 106c can drive the rotation of the second rotating rod 106b. The rotation of the second rotating rod 106b can drive the rotation of the winding wheel, thereby realizing the collection of the membrane filament 108.

[0037] When in use, the first motor 103g-4 is turned on, and the rotation of the first motor 103g-4 drives the squeezing roller 103g-2 to rotate. Through the meshing setting of the two gears 103g-3, the two squeezing rollers 103g-2 can rotate in opposite directions, thereby realizing the transportation of the membrane filament 108. During the transportation process, calculated from the squeezing point of the two squeezing rollers 103g-2 on the membrane filament 108, the free fall height of the membrane filament 108 is at least 1 meter, and the free fall of 1 meter can ensure the relaxation of the membrane filament 108 after being squeezed. Only through the joint action of the winding assembly 106 and the extrusion member 103g can the free fall of the membrane filament 108 be realized, thereby avoiding the separate stretching of the winding assembly 106, directly driving the membrane filament 108 to straighten, and eliminating the relaxed state of the membrane filament 108.

[0038] Example 3

[0039] Reference Figures 4 to 6 , which is the third embodiment of the utility model, this embodiment is based on the previous two embodiments and also includes a casting film assembly 104 including a box body 104a installed on the top of the support plate 101, a discharge port 104b arranged on one side of the box body 104a, a second pulley 104c arranged on the top of the box body 104a, two connecting plates 104d fixed to the side of the box body 104a close to the extrusion assembly 103, and a liquid spraying part 104e installed on one side of the box body 104a, the inner wall of the box body 104a is fixedly connected to a first fixing rod 104f, and the outer ring of the first fixing rod 104f is rotatably sleeved with a fourth pulley 104g.

[0040] The box 104a can hold a coagulation bath, which is ultrapure water, and can effectively form a film of the casting liquid entering the membrane filament 108. The height of the box 104a is 3 meters, which can effectively increase the downward traction force of the membrane filament 108 starting from the nozzle 104e-7. This can effectively restore the shape of the braided tube that has been squeezed at the reel, and the membrane filament 108 will not be squeezed and deformed when passing through the fourth pulley 104g.

[0041] Specifically, the liquid spraying part 104e includes a support bar 104e-1 fixed to the top of a connecting plate 104d, a third pulley 104e-2 rotating on the top of the support bar 104e-1, a connecting column 104e-3 fixed to one side of the support bar 104e-1, and a cylinder 104e-4 fixed to one end of the connecting column 104e-3, and the fourth pulley 104g is located on the central axis of the cylinder 104e-4.

[0042] Furthermore, a volumetric pump 104e-5 is installed on another connecting plate 104d, and a second connecting pipe 104e-6 is fixedly connected to the volumetric pump 104e-5. The second connecting pipe 104e-6 passes through one connecting plate 104d and is fixedly connected to a nozzle 104e-7 at one end, and the nozzle 104e-7 is engaged with the cylinder 104e-4.

[0043] Through the setting of the pressure tank 103d, the first connecting pipe 103e and the storage tank 103c, the casting liquid enters the volumetric pump 104e-5 through the third connecting pipe 107, and the volumetric pump 104e-5 transports the casting liquid to the nozzle 104e-7 through the second connecting pipe 104e-6, and sprays it onto the membrane wire 108 from the nozzle 104e-7. The third pulley 104e-2 is used to transmit the membrane wire 108, and the cylinder 104e-4 is used to limit the membrane wire 108. A notch is set on one side of the top of the cylinder 104e-4, and the notch is engaged with the nozzle 104e-7 to help fix the nozzle 104e-7.

[0044] The nozzle 104e-7 is set in a circular ring shape, which can spray the membrane filament 108 passing through the cylinder 104e-4 in all directions to ensure that the membrane filament 108 can be adhered to the casting liquid at every position, and the nozzle 104e-7 connected to the second connecting pipe 104e-6 can be stuck in the notch of the cylinder 104e-4, and the membrane filament 108 can be attached to the membrane filament 108. Figure 4 The dashed line represents the running path of the membrane filament 108 through the casting membrane assembly 104 .

[0045] Specifically, the irradiation assembly 105 includes a support block 105a fixed to the top of the support plate 101, a placement groove 105b and two fixing holes 105c opened on the top of the support block 105a, an ultraviolet lamp tube 105f placed in the placement groove 105b, and a fixing piece 105g installed on the top of the support block 105a. A second fixing rod 105d is fixedly connected to one side of the support block 105a, and the outer ring of the second fixing rod 105d is rotatably connected to the fifth pulley 105e, and the fifth pulley 105e is located on the central axis of the ultraviolet lamp tube 105f.

[0046] Furthermore, the fixing member 105g includes an arc-shaped plate 105g-1, a positioning hole 105g-3 opened at one end of the arc-shaped plate 105g-1, and a rotating seat 105g-2 rotated at one end of the arc-shaped plate 105g-1, the rotating seat 105g-2 is fixed to the top of the supporting block 105a, the positioning hole 105g-3 is adapted to the fixing hole 105c, and the arc-shaped plate 105g-1 is adapted to the ultraviolet lamp tube 105f.

[0047] Through the membrane filament 108 of the casting membrane assembly 104 and the traction force of the winding assembly 106, the membrane filament 108 enters the ultraviolet lamp tube 105f through the second pulley 104c, and then is supported by the fifth pulley 105e. The membrane filament 108 passing through the fifth pulley 105e can be wound up by the winding assembly 106, and the ultraviolet lamp tube 105f can be fixed by the action of the arc plate 105g-1. The rotating seat 105g-2 provides conditions for the rotation of the arc plate 105g-1, which facilitates the opening of the arc plate 105g-1, and then the arc plate 105g-1 can be fixed by the cooperation of the positioning hole 105g-3, the fixing hole 105c and the bolts.

[0048] When the membrane filament 108 passes through the ultraviolet lamp tube 105f, the lignin membrane will be modified by ultraviolet radiation, because lignin can not only absorb ultraviolet energy through conjugated double bonds, but also its own C=C bond will be destroyed by ultraviolet rays to generate -COOH, thereby improving the hydrophilicity of the lignin membrane, thereby completing the modification of the membrane filament 108.

[0049] In summary, when in use, the device will place the unwinding drum for placing the membrane filament 108 on the first rotating rod 102b, and the membrane filament 108 will enter the extrusion piece 103g through the action of the first pulley 103f, and the extrusion roller 103g-2 will be driven to rotate by the first motor 103g-4 to provide traction for the membrane filament 108. When the natural falling height of the membrane filament 108 is at least one meter, the membrane filament 108 will be lifted up through the third pulley 104e-2 and through the nozzle 104e-7, and then through the action of the pressure tank 103d and the storage tank 103c, the casting liquid is sprayed on the membrane filament 108 through the nozzle 104e-7, and then the membrane filament 108 passes through the fourth pulley 104g, the second pulley 104c, and passes through the ultraviolet lamp tube 105f, and finally the membrane filament 108 is wound up by the winding assembly 106.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A hollow fiber membrane lignin UV modification device, characterized in that: include, A carrying unit (100), the carrying unit (100) comprising a support plate (101), an unwinding assembly (102) installed on the top of the support plate (101), an extrusion assembly (103), a film casting assembly (104), an irradiation assembly (105) and a winding assembly (106), as well as a third connecting tube (107) and a film filament (108), wherein the film filament (108) passes through the unwinding assembly (102), the extrusion assembly (103), the film casting assembly (104), the irradiation assembly (105) and the winding assembly (106) in sequence.

2. The hollow fiber membrane lignin UV modification device according to claim 1, characterized in that: The unwinding assembly (102) comprises a first fixed plate (102a) fixed to the top of the support plate (101) and a first rotating rod (102b) rotating on the first fixed plate (102a).

3. The hollow fiber membrane lignin UV modification device according to claim 2, characterized in that: The extrusion assembly (103) includes a placement plate (103b) fixed to the top of the support plate (101) by four support columns (103a), an extrusion piece (103g) installed on the top of the placement plate (103b), a pressure tank (103d) arranged on one side of the support column (103a), and a storage tank (103c) installed below the placement plate (103b), and a first pulley (103f) is arranged on one side of the placement plate (103b) close to the unwinding assembly (102), and the pressure tank (103d) is connected to the storage tank (103c) through a first connecting pipe (103e).

4. The hollow fiber membrane lignin UV modification device according to claim 3, characterized in that: The extrusion member (103g) comprises two supporting plates (103g-1) symmetrically fixed on the side of the placement plate (103b) away from the unwinding assembly (102), two extrusion rollers (103g-2) rotating between the two supporting plates (103g-1), and two meshing gears (103g-3) arranged on one side of the supporting plate (103g-1), one side of the two gears (103g-3) is respectively at one end of the two extrusion rollers (103g-2), one end of one of the extrusion rollers (103g-2) is fixedly connected to a first motor (103g-4), and the first motor (103g-4) is installed on the top of the placement plate (103b).

5. The hollow fiber membrane lignin UV modification device according to claim 3 or 4, characterized in that: The casting film assembly (104) includes a box body (104a) installed on the top of the support plate (101), a liquid discharge port (104b) arranged on one side of the box body (104a), a second pulley (104c) arranged on the top of the box body (104a), two connecting plates (104d) fixed to the side of the box body (104a) close to the extrusion assembly (103), and a liquid spraying part (104e) installed on one side of the box body (104a), and the inner wall of the box body (104a) is fixedly connected to a first fixed rod (104f), and the outer ring of the first fixed rod (104f) is rotatably sleeved with a fourth pulley (104g).

6. The hollow fiber membrane lignin UV modification device according to claim 5, characterized in that: The liquid spraying member (104e) comprises a support bar (104e-1) fixed to the top of a connecting plate (104d), a third pulley (104e-2) rotating on the top of the support bar (104e-1), a connecting column (104e-3) fixed to one side of the support bar (104e-1), and a cylinder (104e-4) fixed to one end of the connecting column (104e-3), and the fourth pulley (104g) is located on the central axis of the cylinder (104e-4).

7. The hollow fiber membrane lignin UV modification device according to claim 6, characterized in that: A displacement pump (104e-5) is installed on the other connecting plate (104d), a second connecting pipe (104e-6) is fixedly connected to the displacement pump (104e-5), one end of the second connecting pipe (104e-6) passes through a connecting plate (104d) and is fixedly connected to a nozzle (104e-7), and the nozzle (104e-7) is engaged with the cylinder (104e-4).

8. The hollow fiber membrane lignin UV modification device according to claim 7, characterized in that: The irradiation assembly (105) comprises a support block (105a) fixed to the top of the support plate (101), a placement groove (105b) and two fixing holes (105c) opened on the top of the support block (105a), an ultraviolet lamp tube (105f) placed in the placement groove (105b), and a fixing member (105g) installed on the top of the support block (105a); a second fixing rod (105d) is fixedly connected to one side of the support block (105a); an outer ring of the second fixing rod (105d) is rotatably connected to a fifth pulley (105e); and the fifth pulley (105e) is located on the central axis of the ultraviolet lamp tube (105f).

9. The hollow fiber membrane lignin UV modification device according to claim 8, characterized in that: The fixing member (105g) comprises an arc-shaped plate (105g-1), a positioning hole (105g-3) opened at one end of the arc-shaped plate (105g-1), and a rotating seat (105g-2) rotating at one end of the arc-shaped plate (105g-1), the rotating seat (105g-2) is fixed to the top of the supporting block (105a), the positioning hole (105g-3) is matched with the fixing hole (105c), and the arc-shaped plate (105g-1) is matched with the ultraviolet lamp tube (105f).

10. The hollow fiber membrane lignin UV modification device according to claim 9, characterized in that: The winding assembly (106) comprises a second fixed plate (106a) fixed to the top of the support plate (101), and a second rotating rod (106b) rotating on the second fixed plate (106a); one side of the second fixed plate (106a) is fixedly connected to a mounting plate (106d); a second motor (106c) is mounted on the mounting plate (106d); and one end of the second rotating rod (106b) is fixed to the output end of the second motor (106c).

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