A raw material screening device for nanofiber production

Abstract

The utility model relates to nanometer fiber processing technical field, concretely relates to a raw material screening equipment for nanometer fiber production, include: bucket lid, the bottom outer wall of bucket lid is connected with the liquid storage barrel through bolt fixing, the outer wall of liquid storage barrel is equipped with the observation window, the inside of liquid storage barrel is equipped with screening device. Through utilizing the retention aperture of 0.1-1nm of reverse osmosis membrane, can intercept nanometer fiber target raw material, filter out small molecule impurity and solvent, the conical bottom of the bottom of the article net cylinder is combined with the structure of the agitating blade, the synergistic effect, when the agitating blade rotates, can scatter raw material agglomeration particle to avoid membrane hole blockage, can push raw material to the lowest place of conical bottom, is favorable to avoid raw material residue in equipment dead angle, through the observation window made of transparent material, can directly observe the surface crystallization of reverse osmosis membrane of article net cylinder inner wall, impurity accumulation condition with naked eye, need not to judge whether the membrane needs to be replaced without disassembling equipment, is favorable to save the cumbersome operation of dismounting machine.

Description

Technical Field

[0001] This utility model relates to the field of nanofiber processing technology, specifically to a raw material screening device for nanofiber production. Background Technology

[0002] In existing technologies, when nanofiber raw materials are separated into dispersions using wet separation methods, the particles in the dispersion are prone to agglomeration, which can clog the pores of the screening membrane and reduce screening efficiency. Furthermore, the internal structure of the equipment is mostly flat or non-inclined, which can cause raw materials to remain in corners and result in waste. There is also a lack of design for real-time monitoring of the screening membrane status, requiring disassembly of the equipment to check for crystallization and clogging on the membrane surface.

[0003] Therefore, this utility model provides a raw material screening device for nanofiber production. By setting agitating blades with a bottom conforming to a conical bottom inside the storage tank, it not only disperses agglomerated raw material particles to prevent membrane pore blockage, but also, with the conical bottom structure without dead corners, prevents raw material residue. The reverse osmosis membrane is used to separate the target raw material from impurities. At the same time, a transparent annular observation window is set on the outer wall of the storage tank, which allows for visual monitoring of the membrane surface condition. It is possible to determine whether the membrane needs to be replaced without disassembly, thus meeting the needs of the nanofiber processing industry for raw material screening equipment that does not easily leave raw materials residue. Utility Model Content

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this utility model is as follows: a raw material screening device for nanofiber production, comprising: a bucket lid, a liquid storage tank fixedly connected to the bottom outer wall of the bucket lid by bolts, an observation window provided on the outer wall of the liquid storage tank, and a screening device provided inside the liquid storage tank; the screening device includes a material storage screen cylinder, the material storage screen cylinder having a double-layer structure, the bottom of the material storage screen cylinder having a conical bottom, a reverse osmosis membrane fixedly connected to the inner wall of the interlayer of the material storage screen cylinder, a rotating shaft provided inside the material storage screen cylinder, a support frame rotatably connected to the outer wall of the rotating shaft, and stirring blades symmetrically fixedly connected to the outer wall of the rotating shaft, for the initial raw material introduction and pretreatment operation. The raw materials required for nanofiber production, such as polymer particles and inorganic nanopowders, are mixed with a suitable solvent to prepare a uniform raw material dispersion. The inlet pipe at the top of the tank lid, with its flange at the end, ensures a sealed connection of the pipeline to prevent leakage. The raw material dispersion is then injected into the storage mesh cylinder inside the storage tank. The storage mesh cylinder in this screening device has a double-layer structure, with a reverse osmosis membrane fixed to the inner wall of its interlayer. The dispersion is confined inside the storage mesh cylinder, preparing it for the subsequent screening process.

[0005] Preferably, the outer wall of the storage mesh cylinder is fixedly connected to the outer walls of the bucket lid and the storage tank respectively by bolts, the outer wall of the support frame is fixedly connected to the inner wall of the bucket lid, and the outer wall of the rotating shaft away from the stirring blade is rotatably connected to the inner wall of the bucket lid. Then, it enters the core screening stage of the reverse osmosis membrane. After the equipment is started, the reverse osmosis membrane plays a separation role with its 0.1-1nm cutoff pore size. Solvents with particle sizes smaller than the membrane pore size in the raw material dispersion, such as water, organic solvents and small molecule impurities, overcome the osmotic pressure under pressure and penetrate the dense separation layer, transition layer and support layer of the reverse osmosis membrane in sequence, and finally enter the space between the outer side of the storage mesh cylinder and the inner wall of the storage tank; while the nanofiber target raw material with a particle size larger than the membrane pore size cannot penetrate the membrane structure and is stably trapped inside the storage mesh cylinder, realizing the separation and purification of raw materials, impurities and solvents.

[0006] Preferably, a butterfly valve is fixedly connected to the inner wall of the bottom of the storage tank, and an inlet pipe is fixedly connected to the outer wall of the top of the tank cover. A flange is fixedly connected to the outer wall of one end of the inlet pipe. Subsequently, the conical bottom and the stirring blade work together to assist in ensuring screening efficiency and raw material utilization. The rotating shaft rotates under the drive of external power, and the support frame provides support to ensure rotation. The stirring blades on the outer wall of the rotating shaft rotate synchronously. Since the bottom of the stirring blades is in contact with the conical bottom of the storage screen, it can disperse the target raw materials that may agglomerate in the raw material dispersion, avoiding agglomerated particles from clogging the membrane pores. On the other hand, it can push the raw materials to the lowest point of the conical bottom. With the inclined, dead-angle-free structure of the conical bottom, it can completely prevent the raw materials from remaining on the inner wall or bottom of the storage screen. After separation is completed, the butterfly valve is opened to discharge impurities.

[0007] Preferably, the observation window is made of transparent material and is distributed in a ring along the circumference of the storage tank. Finally, the observation window is used to monitor and determine whether the reverse osmosis membrane needs to be replaced. The observation window, which is distributed in a ring along the circumference of the outer wall of the storage tank, is made of transparent polycarbonate material, which has impact resistance and solvent resistance, and can withstand the low-pressure environment during the screening process. The surface condition of the reverse osmosis membrane on the inner wall of the screen cylinder can be observed in real time. If obvious impurity crystals, raw material agglomeration and accumulation are observed on the membrane surface, or if the solvent permeation rate to the outside of the screen cylinder is significantly reduced, it indicates that the membrane pores are partially blocked, and the reverse osmosis membrane can no longer meet the screening requirements. At this time, the equipment operation needs to be stopped, the bolts connecting the screen cylinder to the tank cover and the storage tank need to be removed, the screen cylinder needs to be removed, and the reverse osmosis membrane in its interlayer needs to be replaced to restore the screening performance of the equipment.

[0008] The beneficial effects of this utility model are as follows:

[0009] 1. This utility model uses a double-layered conical bottom screen cylinder and a reverse osmosis membrane fixed in the interlayer. Utilizing the 0.1-1nm pore size of the reverse osmosis membrane, it can retain nanofiber target raw materials and filter out small molecule impurities and solvents. The conical bottom of the screen cylinder and the stirring blades that fit its structure work together. When the stirring blades rotate, they can not only break up the agglomerated particles of the raw materials to avoid membrane pore blockage and maintain screening efficiency, but also push the raw materials to the lowest point of the conical bottom, which helps to avoid the raw materials remaining in the dead corners of the equipment.

[0010] 2. This utility model allows for visual observation of the surface crystallization and impurity accumulation of the reverse osmosis membrane on the inner wall of the storage mesh tube through an observation window made of transparent material. This enables the determination of whether the membrane needs to be replaced without disassembling the equipment, thus saving the tedious operation of disassembling and installing the machine. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the back structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the screening device of this utility model.

[0015] In the diagram: 1. Bucket lid; 2. Storage tank; 3. Observation window; 4. Butterfly valve; 5. Inlet pipe; 6. Sieving device; 60. Storage screen cylinder; 61. Conical bottom; 62. Reverse osmosis membrane; 63. Rotating shaft; 64. Support frame; 65. Stirring blade. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0017] Example:

[0018] Please see Figure 1 - Figure 4This utility model provides a technical solution: a raw material screening device for nanofiber production, comprising: a barrel cover 1, a liquid storage tank 2 fixedly connected to the bottom outer wall of the barrel cover 1 by bolts, an observation window 3 opened on the outer wall of the liquid storage tank 2, and a screening device 6 provided inside the liquid storage tank 2; the screening device 6 includes a storage screen cylinder 60, the storage screen cylinder 60 is a double-layer structure, the bottom of the storage screen cylinder 60 is a conical bottom 61, a reverse osmosis membrane 62 is fixedly connected to the inner wall of the interlayer of the storage screen cylinder 60, a rotating shaft 63 is provided inside the storage screen cylinder 60, a support frame 64 is rotatably connected to the outer wall of the rotating shaft 63, and stirring blades 65 are symmetrically fixedly connected to the outer wall of the rotating shaft 63.

[0019] The outer wall of the storage net cylinder 60 is fixedly connected to the outer walls of the bucket lid 1 and the liquid storage tank 2 respectively by bolts. The outer wall of the support frame 64 is fixedly connected to the inner wall of the bucket lid 1. The outer wall of the rotating shaft 63 away from the stirring blade 65 is rotatably connected to the inner wall of the bucket lid 1.

[0020] A butterfly valve 4 is fixedly connected to the inner wall of the bottom of the liquid storage tank 2, and an inlet pipe 5 is fixedly connected to the outer wall of the top of the tank cover 1. A flange is fixedly connected to the outer wall of one end of the inlet pipe 5. The observation window 3 is made of transparent material and is distributed in a ring along the circumference of the liquid storage tank 2.

[0021] Working principle:

[0022] First, raw material introduction and pretreatment are carried out. The raw materials required for nanofiber production, such as polymer particles and inorganic nanopowders, are mixed with a suitable solvent to prepare a uniform raw material dispersion. The inlet pipe 5 at the top of the lid 1, with its flange at the end, ensures a sealed connection of the pipeline to prevent leakage. The raw material dispersion is injected into the storage mesh cylinder 60 inside the storage tank 2. The storage mesh cylinder 60 in the screening device 6 has a double-layer structure, with a reverse osmosis membrane 62 fixed on the inner wall of its interlayer. The dispersion is confined inside the storage mesh cylinder 60, preparing it for the subsequent screening process.

[0023] Next, the core screening stage of the reverse osmosis membrane 62 begins. After the equipment is started, the reverse osmosis membrane 62, with its 0.1-1nm pore size, plays a separation role. Solvents with particle sizes smaller than the membrane pore size in the feed dispersion, such as water, organic solvents, and small molecule impurities, overcome the osmotic pressure under pressure and penetrate the dense separation layer, transition layer, and support layer of the reverse osmosis membrane 62 in sequence, finally entering the space between the outer side of the storage mesh cylinder 60 and the inner wall of the storage tank 2. Meanwhile, the nanofiber target raw materials with particle sizes larger than the membrane pore size cannot penetrate the membrane structure and are stably retained inside the storage mesh cylinder 60, thus achieving the separation and purification of raw materials, impurities, and solvents.

[0024] Subsequently, the conical bottom 61 and the stirring blades work together to ensure screening efficiency and raw material utilization. The rotating shaft 63 rotates under the drive of external power, and the support frame 64 provides support to ensure rotation. The stirring blades 65 on the outer wall of the rotating shaft 63 rotate synchronously. Since the bottom of the stirring blades 65 is attached to the conical bottom 61 of the storage screen cylinder 60, it can disperse the target raw materials that may agglomerate in the raw material dispersion, avoiding agglomerated particles from clogging the membrane pores. On the other hand, it can push the raw materials to the lowest point of the conical bottom 61. With the inclined, dead-angle-free structure of the conical bottom 61, it can completely prevent the raw materials from remaining on the inner wall or bottom of the storage screen cylinder 60. After separation is completed, the butterfly valve 4 is opened to discharge impurities.

[0025] Finally, the observation window 3 is used to monitor and determine whether the reverse osmosis membrane 62 needs to be replaced. The observation window 3, which is circularly distributed along the circumference of the outer wall of the storage tank 2, is made of transparent polycarbonate, which is impact-resistant and solvent-resistant, and can withstand the low-pressure environment during the screening process. The surface condition of the reverse osmosis membrane 62 on the inner wall of the storage screen 60 can be observed in real time. If obvious impurity crystals, raw material agglomeration and accumulation are observed on the membrane surface, or if the solvent permeation rate to the outside of the storage screen 60 is significantly reduced, it indicates that the membrane pores are partially blocked. This means that the reverse osmosis membrane 62 can no longer meet the screening requirements. At this time, the equipment operation should be stopped, the bolts connecting the storage screen 60 to the lid 1 and the storage tank 2 should be removed, the storage screen 60 should be taken out, and the reverse osmosis membrane 62 in its interlayer should be replaced to restore the screening performance of the equipment.

[0026] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A raw material screening device for nanofiber production, comprising: A bucket lid (1) is provided with a liquid storage tank (2) fixedly connected to the bottom outer wall of the bucket lid (1) by bolts. The liquid storage tank (2) is characterized in that an observation window (3) is provided on the outer wall of the liquid storage tank (2), and a sieving device (6) is provided inside the liquid storage tank (2). The screening device (6) includes a storage screen cylinder (60), which has a double-layer structure. The bottom of the storage screen cylinder (60) is a conical bottom (61). A reverse osmosis membrane (62) is fixedly connected to the inner wall of the interlayer of the storage screen cylinder (60). A rotating shaft (63) is provided inside the storage screen cylinder (60). A support frame (64) is rotatably connected to the outer wall of the rotating shaft (63). Agitator blades (65) are symmetrically fixedly connected to the outer wall of the rotating shaft (63).

2. The raw material screening equipment for nanofiber production according to claim 1, characterized in that: The outer wall of the storage net tube (60) is fixedly connected to the outer walls of the bucket lid (1) and the liquid storage tank (2) respectively by bolts. The outer wall of the support frame (64) is fixedly connected to the inner wall of the bucket lid (1). The outer wall of the rotating shaft (63) away from the stirring blade (65) is rotatably connected to the inner wall of the bucket lid (1).

3. The raw material screening equipment for nanofiber production according to claim 1, characterized in that: A butterfly valve (4) is fixedly connected to the inner wall of the bottom end of the liquid storage tank (2), and an inlet pipe (5) is fixedly connected to the outer wall of the top end of the tank cover (1). A flange is fixedly connected to the outer wall of one end of the inlet pipe (5).

4. The raw material screening equipment for nanofiber production according to claim 1, characterized in that: The observation window (3) is made of transparent material and is distributed in a ring along the circumference of the liquid storage tank (2).

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