Device for preparing nanofibers through unpowered high-speed airflow spinning

Abstract

The utility model discloses a device for preparing nanofibers through unpowered high-speed airflow spinning. The device comprises a gas cylinder, a humidity adjusting tank, a gas pipeline, an adjustable ultrasonic humidifier, an unpowered spinning device, a spinning solution pipeline, a solution tank air pressure adjusting valve, a spinning solution tank and a rotary spinning collecting net. The gas cylinder is connected with the humidity adjusting tank, and the humidity adjusting tank is connected with a compressed gas inlet of the unpowered spinning device through a gas pipeline; the humidity adjusting tank is also connected with an adjustable ultrasonic humidifier; an outlet of the spinning solution tank is connected with a spinning solution inlet of the unpowered spinning device through a spinning solution pipeline; a solution tank air pressure regulating valve is further arranged on the spinning solution tank; and the bottom of the unpowered spinning device is connected with the rotary spinning collecting net. The high-speed airflow spinning device can realize high-speed airflow spinning, so that high-efficiency fiber production is realized, molten polymers are quickly jetted into fibers by utilizing high-speed airflow, and the production efficiency and the yield are greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of high-speed air spinning research, in particular to a device for preparing nanofibers by non-powered high-speed air spinning. Background Art

[0002] With the increasing requirements of people for air quality and the gradual improvement of national regulations on pollutant emission control, particulate matter, as an important emission source of air pollution, has received more and more attention in terms of its emission control and treatment. At present, traditional particulate matter treatment technologies include means such as gravity sedimentation, electrostatic purification, washing purification, and mechanical purification. Due to reasons such as unsatisfactory efficiency, high operating costs, and complex equipment, the development and application of these technologies have been restricted.

[0003] Filtration technology is one of the traditional treatment technologies, which is applied to purify air at the end of ventilation equipment or pipelines. It has the characteristics of simple system and low maintenance cost, and can be well applied to particulate matter emission control and air purification. The filter material of the filter screen is the core of filtration technology. Nanofiber materials have a nanoscale diameter. According to the Knudsen number's partitioning of the flow field, the airflow around the nanofibers will be in the slip or transition zone, or even the free molecular zone. The disturbance of the flow field will become smaller or even negligible, and the airflow will be closer to the fiber surface, resulting in an increased contact probability between particulate matter and the fiber and better filtration performance.

[0004] Currently, the most common method for preparing nanofibers is the electrospinning method. However, the electrospinning method has a low production capacity for preparing fibers and a complex process, thus hindering the large-scale production of nano or microfibers. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the defects of the prior art and provide a device for preparing nanofibers by non-powered high-speed air spinning, which can realize high-speed air spinning, thereby achieving efficient fiber production. The molten polymer is rapidly ejected into fibers by high-speed air, thus greatly improving the production efficiency and output.

[0006] The purpose of the utility model is achieved as follows: A device for preparing nanofibers by non-powered high-speed air spinning includes a gas cylinder, a humidity adjustment tank, a gas pipeline, an adjustable ultrasonic humidifier, a non-powered spinning device, a spinning solution pipeline, a solution tank pressure regulating valve, a spinning solution tank, and a rotating spinning collection net;

[0007] The gas cylinder is connected to the humidity adjustment tank, and the humidity adjustment tank is connected to the compressed gas inlet of the non-powered spinning device through the gas pipeline; the humidity adjustment tank is also connected to the adjustable ultrasonic humidifier;

[0008] The outlet of the spinning solution tank is connected to the spinning solution inlet of the non-powered spinning device through a spinning solution pipeline; a solution tank air pressure regulating valve is also provided on the spinning solution tank; the bottom of the non-powered spinning device is connected to a rotating spinning collection net.

[0009] When the utility model works, the gas cylinder provides compressed dry air required for spinning, and a pressure regulating valve is provided between the gas cylinder and the humidity regulating tank to stabilize the fluid pressure; the adjustable ultrasonic humidifier drives the atomizing sheet to vibrate through the high-frequency oscillation of ultrasonic waves to turn water into water mist, providing humidity conditions for spinning. The humidity regulating tank can adjust the water mist provided by the adjustable ultrasonic humidifier and the compressed dry air provided by the gas cylinder into the corresponding air conditions required for spinning; the gas pipeline transports the adjusted air flow to the spinning device, and the flow regulating valve is used to adjust the gas flow entering the nozzle. The spinning solution tank is used to store the spinning solution, and the spinning solution pipeline transports the spinning solution to the spinning device; the solution tank air pressure regulating valve is used to adjust the air pressure in the spinning solution tank to ensure the stability of the spinning solution transportation; the rotating spinning collection net can rotate during the spinning collection process, and the rotation speed can be adjusted, so that the collected fibers are more evenly distributed.

[0010] The utility model adopts the above technical solutions. Compared with the prior art, the beneficial effects are as follows: High-speed air flow spinning can achieve efficient fiber production. The molten polymer is quickly ejected into fibers by high-speed air flow, thus greatly improving the production efficiency and output; Compared with traditional spinning methods, high-speed air flow spinning has lower costs. This technology simplifies the production process, reduces the consumption of energy and raw materials, and also reduces the complexity of equipment and the operation difficulty; The high-speed air flow spinning technology is applicable to the processing of various polymers, including natural and synthetic polymers. This flexibility enables the technology to adapt to the production requirements of different types of fibers and meet the diverse requirements of the market; Fiber quality consistency: Through the cooling effect of high-speed air flow, the spun filaments are stretched and formed into slender fibers, while maintaining the stability of fiber diameter and shape, thus obtaining consistent fiber quality.

[0011] Further, the non-powered spinning device includes a compressed gas inlet, a stainless steel pipe, a central air duct, a spinning solution inlet, a disc and a high-pressure gas nozzle; the disc is welded to the stainless steel pipe; a central air duct is arranged inside the stainless steel pipe, and a compressed gas inlet is arranged above the central air duct; the spinning solution inlet is located above the disc, and a high-pressure gas nozzle is also arranged below the disc.

[0012] In order to adjust and stabilize the fluid pressure, a pressure regulating valve is also provided between the gas cylinder and the humidity regulating tank.

[0013] To adjust the gas flow rate entering the nozzle, a flow regulating valve is provided at the compressed gas inlet of the non-powered spinning device, and the flow regulating valve is connected to the gas pipeline.

[0014] To adjust the air pressure in the spinning solution tank to ensure the stability of the spinning solution transportation, one end of the solution tank air pressure regulating valve is connected to the spinning solution tank through a gas pipeline, and the other end is connected to the gas pipeline. Brief Description of the Drawings

[0015] Figure 1 Structural schematic diagram of the present utility model.

[0016] Figure 2 Cross-sectional view of the non-powered spinning device of the present utility model.

[0017] Figure 3 Top view of the non-powered spinning device of the present utility model.

[0018] Wherein, 1 gas cylinder, 2 pressure regulating valve, 3 humidity regulating tank, 4 gas pipeline, 5 adjustable ultrasonic humidifier, 6 flow regulating valve, 7 non-powered spinning device, 71 compressed gas inlet, 72 stainless steel pipe, 73 middle air duct, 74 spinning solution inlet, 75 disc, 76 high-pressure gas nozzle, 8 spinning solution pipeline, 9 solution tank air pressure regulating valve, 10 spinning solution tank, 11 rotating spinning collection net. Detailed Description of the Invention

[0019] As Figure 1 shown, a device for preparing nanofibers by non-powered high-speed air spinning includes a gas cylinder 1, a pressure regulating valve 2, a humidity regulating tank 3, a gas pipeline 4, an adjustable ultrasonic humidifier 5, a flow regulating valve 6, a non-powered spinning device 7, a spinning solution pipeline 8, a solution tank air pressure regulating valve 9, a spinning solution tank 10 and a rotating spinning collection net 11;

[0020] The gas cylinder 1 is connected to the humidity regulating tank 3, and the humidity regulating tank 3 is connected to the compressed gas inlet 71 of the non-powered spinning device 7 through the gas pipeline 4; the humidity regulating tank 3 is also connected to the adjustable ultrasonic humidifier 5; a pressure regulating valve 2 is further provided between the gas cylinder 1 and the humidity regulating tank 3;

[0021] The outlet of the spinning solution tank 10 is connected to the spinning solution inlet 74 of the non-powered spinning device 7 through the spinning solution pipeline 8; a solution tank air pressure regulating valve 9 is further provided on the spinning solution tank 10; the bottom of the non-powered spinning device 7 is connected to the rotating spinning collection net 11.

[0022] A flow regulating valve 6 is provided on the compressed gas inlet 71 of the non-powered spinning device 7, and the flow regulating valve 6 is connected to the gas pipeline 4; one end of the solution tank air pressure regulating valve 9 is connected to the spinning solution tank 10 through a gas pipeline, and the other end is connected to the gas pipeline 4.

[0023] As Figures 2-3 shown, the non-powered spinning device 7 includes a compressed gas inlet 71, a stainless steel pipe 72, a central air duct 73, a spinning solution inlet 74, a disc 75 and a high-pressure gas nozzle 76; the disc 75 is welded to the stainless steel pipe 72; a central air duct 73 is provided inside the stainless steel pipe 72, and a compressed gas inlet 71 is provided above the central air duct 73; the spinning solution inlet 74 is located above the disc 75, and a high-pressure gas nozzle 76 is also provided below the disc.

[0024] When the utility model works, the gas cylinder 1 provides the compressed dry air required for spinning. A pressure regulating valve 2 is provided between the gas cylinder 1 and the humidity regulating tank 3 to regulate and stabilize the fluid pressure; the adjustable ultrasonic humidifier 5 drives the atomizing sheet to vibrate through the high-frequency oscillation of ultrasonic waves to turn water into water mist, providing humidity conditions for spinning, and controlling the atomization amount by adjusting the oscillation frequency of ultrasonic waves; the humidity regulating tank 3 can fully mix the water mist provided by the adjustable ultrasonic humidifier 5 and the compressed dry air provided by the gas cylinder; the gas pipeline 4 transports the adjusted air flow to the non-powered spinning device 7, and the flow regulating valve 6 is used to regulate the gas flow entering the nozzle; the spinning solution tank 10 is used to store the spinning solution, the spinning solution pipeline 8 transports the spinning solution to the non-powered spinning device 7, and the solution tank air pressure regulating valve 9 is used to regulate the air pressure in the spinning solution tank to ensure the stability of the spinning solution transportation; the rotating spinning collection net 11 can rotate during the spinning collection process, and the rotation speed can be adjusted, so that the collected fibers are more evenly distributed.

[0025] A method for preparing nanofibers by needleless non-powered high-speed air spinning using the above device includes the following steps:

[0026] Step 1): Before spinning, the solution is sent to the spinning solution inlet 74 on the disc 75 by adjusting the solution tank air pressure regulating valve 9, and then the liquid feeding is stopped;

[0027] Step 2): Open the gas cylinder 1 and the adjustable ultrasonic humidifier 5, and adjust the pressure regulating valve 2, the humidity regulating tank 3 and the flow regulating valve 6 to provide a suitable spinning air flow, and the air flow blows out from the high-pressure gas nozzle 76;

[0028] Step 3: Open the rotating spinning collection net 11 and continue to feed the liquid to start preparing nanofibers; when the solution flows out from the spinning solution inlet 74, the gas ejected from the high-pressure gas nozzle 76 blows out the solution to form fibers, and finally they are evenly collected by the collection net.

[0029] Preparing nanofibers by high-speed air spinning, with the solute preferably being polyurethane; the solvent preferably being N,N-dimethylformamide; after preparing a spinning solution with a certain mass percentage, putting the spinning solution into a tank, and then conveying the spinning solution to the spinning solution inlet on the power-free spinning device according to Step 1, and preparing high-speed air spinning nanofibers in Steps 2-3.

[0030] The present utility model is not limited to the above embodiments. Based on the technical solutions disclosed in the present utility model, those skilled in the art can, according to the disclosed technical content, make some substitutions and deformations to some of the technical features without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. An apparatus for preparing nanofibers by unpowered high-speed air spinning, characterized in that, It includes a gas cylinder (1), a humidity adjustment tank (3), a gas pipeline (4), an adjustable ultrasonic humidifier (5), a non-powered spinning device (7), a spinning solution pipeline (8), a solution tank air pressure regulating valve (9), a spinning solution tank (10), and a rotating spinning collection net (11); The gas cylinder (1) is connected to the humidity adjustment tank (3), and the humidity adjustment tank (3) is connected to the compressed gas inlet (71) of the non-powered spinning device (7) through the gas pipeline (4); the humidity adjustment tank (3) is also connected to the adjustable ultrasonic humidifier (5); The outlet of the spinning solution tank (10) is connected to the spinning solution inlet (74) of the non-powered spinning device (7) through the spinning solution pipeline (8); a solution tank air pressure regulating valve (9) is also provided on the spinning solution tank (10); the bottom of the non-powered spinning device (7) is connected to the rotating spinning collection net (11).

2. The device for preparing nanofibers by non-powered high-speed air spinning according to claim 1, characterized in that, The non-powered spinning device (7) includes a compressed gas inlet (71), a stainless steel pipe (72), a central air duct (73), a spinning solution inlet (74), a disc (75), and a high-pressure gas nozzle (76); the disc (75) is welded to the stainless steel pipe (72); a central air duct (73) is provided inside the stainless steel pipe (72), and a compressed gas inlet (71) is provided above the central air duct (73); the spinning solution inlet (74) is located above the disc (75), and a high-pressure gas nozzle (76) is also provided below the disc.

3. The device for preparing nanofibers by unpowered high-speed air spinning according to claim 1, characterized in that, A pressure regulating valve (2) is also provided between the gas cylinder (1) and the humidity adjustment tank (3).

4. The device for preparing nanofibers by non-powered high-speed air spinning according to claim 2, characterized in that, A flow regulating valve (6) is provided on the compressed gas inlet (71) of the non-powered spinning device (7), and the flow regulating valve (6) is connected to the gas pipeline (4).

5. The device for preparing nanofibers by non-powered high-speed air spinning according to claim 1, characterized in that, One end of the solution tank air pressure regulating valve (9) is connected to the spinning solution tank (10) through a gas pipeline, and the other end is connected to the gas pipeline (4).

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