Spinneret assembly with controllable gas gap environment

Abstract

The present application relates to phase inversion method film preparation technical field, specifically, it is a kind of spinning nozzle assembly with gas gap environment controllable function, including spinning nozzle module and gas gap environment control system, wherein the gas gap environment control system includes environment box and multiple environment detection sensors in the environment box, the upper portion of the environment box is equipped with humidification inlet and dry gas inlet, and the lower end is equipped with output, the wall of the environment box is equipped with insulation layer, and the insulation layer is equipped with heating element and temperature controller, spinning nozzle module is equipped on the upper end of the environment box, and the spinning nozzle module includes nozzle base body, the nozzle base body is equipped with core liquid delivery channel and slurry delivery channel.The present application can solve the bottleneck problem of long response time and uncontrolled film preparation conditions in phase inversion method film preparation technology by accurately controlling the gas gap microenvironment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of phase inversion membrane preparation, in particular to a spinning nozzle assembly with controllable gas gap environment. BACKGROUND

[0002] The research of membrane technology in China began in the 1950s. After the Chinese Chemical Research Institute developed the first membrane in China, polyvinyl alcohol ion exchange membrane, the membrane industry in China has made great progress. The total output value of the separation membrane industry in China increased from 200 million yuan in 1993 to 7.3 billion yuan in 2014, and is expected to reach 100 billion yuan in 2022.

[0003] The research of separation membrane mainly focuses on three key scientific issues: the relationship between membrane function and membrane microstructure, the formation mechanism and control method of membrane microstructure, and the evolution law of membrane microstructure in application process. However, there is still a certain gap between China's independent research and development and production of membrane materials and foreign advanced level. The quality of domestic membrane products cannot reach the same level as imported products, resulting in that domestic membrane products always stay in the low-end market. High-performance separation membranes are monopolized by foreign enterprises in terms of technology, market and price. In the low-end market, the import proportion of membranes is about 45%, while in the high-end market, the import rate is as high as 90%-95%. The price of many imported membrane materials is as high as 10,000 yuan per square meter.

[0004] Compared with foreign products, the defects of domestic membrane products are generally manifested in small flux, short service life, unstable performance, uneven pore size and other problems. In addition to the influence of membrane raw materials, the main reason is closely related to the membrane preparation process. Therefore, how to control and improve the membrane preparation process is extremely important for rapidly improving the competitiveness of China's membrane industry and breaking the monopoly of imported membranes in the market.

[0005] The phase inversion method can produce finger-like structure and sponge-like structure. Different membrane structures have different effects on the performance of membrane formation, and finally affect the function of the membrane. Therefore, controlling the influencing factors of the phase inversion process is very important for membrane formation. In the process of phase inversion membrane formation, the extruded fiber tube blank passes through a gas gap before entering the external flocculant. When the casting solution is extruded from the spinneret containing the inner tube, the inner layer of the hollow fiber membrane contacts the inner coagulation bath, and the solvent and non-solvent double diffusion phase inversion process begins. The outer layer of the hollow fiber membrane contacts the air, and the volatile solvent begins to volatilize, and at the same time the membrane outer layer adsorbs the moisture in the air for phase inversion process. The different synchronization and degree of difference between the inner and outer layers of the phase inversion process produces the unique internal and external structure changes of the hollow fiber membrane. It is worth noting that during the phase inversion process, the temperature of the gas gap will affect the phase of the molecules in the solution and the evaporation of the solvent. With the increase of temperature, the evaporation rate of the solvent increases, and at the same time the movement ability of the membrane molecular chain segment is strengthened, and the membrane molecules can quickly adjust the conformation to achieve crystallization. At a certain temperature, when the ambient humidity is large, the evaporation speed of the solvent is very slow, and the polymer has enough time to adjust its conformation, causing the membrane material molecules to be too tightly packed, resulting in a higher degree of crystallinity, thereby causing the permeation flux of the membrane to decrease significantly. Therefore, the temperature, pressure, humidity and atmosphere of the gas gap in the process of phase inversion preparation of hollow fiber separation membrane have a very significant influence on the microstructure and quality of the membrane. Only by precisely controlling the temperature, pressure, humidity and atmosphere of the gas gap can the packing state and crystallinity of the membrane separation be finely controlled, so as to effectively control the structure and performance of the membrane.

[0006] At present, domestic scientific research units and enterprises that research and produce separation membranes all control the temperature and humidity of the entire operating room where the membrane preparation equipment is located to macroscopically control the temperature and humidity of the gas gap. Due to a series of reasons such as the saturation vapor pressure of the solvent (water) on the surface of the coagulation bath, this method has the weaknesses of hysteresis and poor controllability, and the near-surface region of the membrane is easily affected by uncertain factors, thereby affecting the membrane quality and the reproducibility of membrane preparation. This is specifically reflected in:

[0007] (1) It is difficult to accurately control the microenvironment temperature of the equipment gas gap and to finely control the temperature by controlling the temperature of the entire operating room where the membrane preparation equipment is located. Therefore, it is difficult to accurately control the evaporation rate of the solvent and the conformation adjustment process of the membrane molecules.

[0008] (2) By controlling the humidity of the entire operating room where the membrane preparation equipment is located, the saturation vapor pressure of the solvent (water) on the surface of the coagulation bath below the gas gap will cause the microenvironment humidity of the gas gap to be different from the humidity of the entire operating room. Therefore, it is difficult to accurately control the evaporation rate of the solvent and the conformation adjustment process of the membrane molecules.

[0009] (3) After the casting solution is extruded from the spinneret, the hollow fiber membrane is directly exposed to the air, and the outer layer directly contacts the air to evaporate the solvent and the phase inversion caused by the air humidity, without considering the change of the micro-environment atmosphere caused by the continuous evaporation of the solvent in the whole spinning process, thereby causing the problem of poor repeatability of the microstructure of each section of the hollow fiber membrane. SUMMARY

[0010] The purpose of the present application is to provide a spinning nozzle assembly with controllable gas gap environment function, which can solve the bottleneck problem of long response time and uncontrollable membrane preparation conditions in the phase inversion method by accurately controlling the gas gap micro-environment.

[0011] The purpose of the present application is achieved by the following technical solutions:

[0012] A spinning nozzle assembly with controllable gas gap environment function, comprising a spinning nozzle module and a gas gap environment control system, wherein the gas gap environment control system comprises an environment box and a plurality of environment detection sensors arranged in the environment box, a humidifying gas inlet and a dry gas inlet are arranged on the upper part of the environment box, an output port is arranged at the lower end of the environment box, a heat preservation layer is arranged in the wall of the environment box, and a heating element and a temperature controller are arranged in the heat preservation layer, the spinning nozzle module is arranged at the upper end of the environment box, and the spinning nozzle module comprises a nozzle base, and a core liquid delivery channel and a slurry delivery channel are arranged in the nozzle base.

[0013] The environment detection sensors in the environment box comprise a temperature and humidity sensor and a pressure sensor.

[0014] An exhaust port is arranged on one side of the environment box.

[0015] An exhaust baffle is arranged outside the exhaust port, and the upper end of the exhaust baffle is hingedly connected to the environment box.

[0016] The spinning nozzle module is a single slurry channel spinning nozzle, the core liquid delivery channel is arranged at the center of the nozzle base, and the first slurry delivery channel is arranged outside the core liquid delivery channel.

[0017] The spinning nozzle module is a double slurry channel spinning nozzle, the core liquid delivery channel, the first slurry delivery channel and the second slurry delivery channel are arranged in the nozzle base, the core liquid delivery channel is arranged at the center of the nozzle base, the first slurry delivery channel is arranged outside the core liquid delivery channel, and the second slurry delivery channel is arranged outside the first slurry delivery channel.

[0018] The lower end of the core liquid delivery channel and the lower end of each slurry delivery channel form a spinning hole.

[0019] The spinning nozzle module is arranged on a mounting frame body, and the mounting frame body is detachably arranged on the upper end of the environment box body of the gas gap environment control system.

[0020] The mounting frame body is provided with a mounting bottom plate, the spinning nozzle module is fixed on the mounting bottom plate through a pressing plate, and the upper end of the environment box body is provided with clamping grooves, and the two sides of the mounting bottom plate are respectively inserted into the corresponding clamping grooves.

[0021] The mounting bottom plate is provided with an ultrasonic sensor, and the mounting frame body is arranged on a lifting device.

[0022] The advantages and positive effects of the present application are:

[0023] 1. The conventional membrane preparation equipment controls the temperature and humidity of the whole operation chamber to macroscopically control the temperature and humidity of the gas gap. Due to a series of reasons such as the solvent saturation vapor pressure generated on the surface of the coagulation bath, this method has the weaknesses of hysteresis and poor controllability, and the near-surface area of the membrane is easily affected by uncertain factors, thereby affecting the membrane quality and the reproducibility of membrane preparation. The present application can accurately control the space humidity, temperature, pressure and the like of the gas gap environment control system, thereby overcoming the bottleneck problems of long response time, multiple environmental factors and uncontrollability of conventional devices, and truly realizing the accurate and controllable preparation of hollow fiber membranes.

[0024] 2. The present application not only takes into account the advantages of traditional spinning devices and conventional technologies, such as small floor area, easy linear expansion, energy saving, simple operation and the like, but also overcomes the shortcomings of existing preparation technologies that cannot realize accurate and controllable preparation of membrane materials through the accurate control of the gas gap environment control system in the membrane preparation equipment, thereby realizing the dual optimization control of improving the membrane preparation efficiency and reducing environmental interference, and meeting the controllable preparation requirements of hollow fiber membranes with various complex structures and compositions.

[0025] 3. The spinning nozzle module of the present application includes two structural forms of single-solution channel spinning nozzle and double-solution channel spinning nozzle, and different numbers of spinning nozzles can be selected according to actual needs, which is more flexible to use, and the nozzle is convenient to disassemble and replace.

[0026] 4. The gas gap environment control system of the present application is provided with an ultrasonic sensor on one side of the upper end for accurately measuring the distance between the gas gap environment control system and the coagulation bath, and the gas gap environment control system can adjust the height through a lifting device, thereby adjusting the distance between the gas gap environment control system and the coagulation bath, so as to ensure the membrane preparation quality. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic view of the present application,

[0028] Figure 2 is a sectional view of the present application,

[0029] Figure 3 The decomposition schematic diagram of the present application is shown in the figure,

[0030] Figure 4 The cross section schematic diagram of the single slurry channel spinning nozzle used in the present application is shown in the figure,

[0031] Figure 5 The cross section schematic diagram of the double slurry channel spinning nozzle used in the present application is shown in the figure,

[0032] Figure 6 The effect schematic diagram of the comparative example of the present application is shown in the figure,

[0033] Figure 7 The effect schematic diagram of the application example of the present application is shown in the figure.

[0034] Wherein, 1 is the spinning nozzle module, 101 is the mounting base plate, 102 is the pressing plate, 2 is the gas gap environment control system, 201 is the clamping groove, 3 is the humidifying air inlet, 4 is the dry air inlet, 5 is the output port, 6 is the exhaust port, 7 is the temperature and humidity sensor, 8 is the pressure sensor, 9 is the ultrasonic sensor, 10 is the mounting frame body, 11 is the nozzle base body, 12 is the core liquid delivery channel, 13 is the first slurry delivery channel, 14 is the second slurry delivery channel. DETAILED DESCRIPTION

[0035] The present application will be further described in detail below with reference to the accompanying drawings.

[0036] As shown in the figure, Figures 1-5 the present application comprises a spinning nozzle module 1 and a gas gap environment control system 2, wherein the gas gap environment control system 2 comprises an environment box body and a plurality of environment detection sensors arranged in the environment box body, the upper part of the environment box body is provided with a humidifying air inlet 3 and a dry air inlet 4, the lower end is provided with an output port 5, a heat preservation layer is arranged in the wall of the environment box body, and a heating element and a temperature controller are arranged in the heat preservation layer, the spinning nozzle module 1 is arranged on the upper end of the environment box body, and as shown in the figure, Figures 4-5 the spinning nozzle module 1 comprises a nozzle base body 11, and the nozzle base body 11 is provided with a core liquid delivery channel 12 and a slurry delivery channel.

[0037] As shown in the figure, Figures 1-3As shown, the humidifying air inlet 3 on the environment box is communicated with the first air flow generating device and the humidity generating device for inputting humidified gas into the environment box, and the dry gas inlet 4 on the environment box is communicated with the second air flow generating device for inputting dry gas. The humidity and air pressure in the environment box can be adjusted by adjusting the parameters of the humidity generating device and the air flow generating devices. The air flow generating device and the humidity generating device are both known in the art and are commercially available products. The air flow generating device includes a precision gas mass flow meter which is connected with an intelligent gas flow control system in the air flow generating device to realize accurate control of gas flow, thereby realizing accurate control of humidity and air pressure in the environment box.

[0038] In this embodiment, the pipeline diameter of the humidifying air inlet 3 is 1-50 mm, the inlet humidity is 1% RH-99% RH, the dry gas inlet 4 inputs one or more of air, argon, nitrogen, helium, etc., the range of the precision gas mass flow meter is 0-500 mL / min, and the material of the environment box can be stainless steel, polytetrafluoroethylene, organic glass, etc., and the shape can be circular, arc, square or other irregular shapes.

[0039] As shown in Figures 1-3 The environment detection sensors in the environment box include a temperature and humidity sensor 7 and a pressure sensor 8, both of which are connected with the intelligent control system of the device. The temperature and humidity sensor 7 is used to monitor the temperature and humidity in the environment box in real time, and the pressure sensor 8 is used to monitor the pressure in the environment box in real time. The number and position of the temperature and humidity sensor 7 and the pressure sensor 8 can be arranged in the environment box according to actual needs, such as being arranged on the upper, middle and / or lower part of the environment box. The temperature and humidity sensor 7 and the pressure sensor 8 are both commercially available products. In this embodiment, the brand and model of the temperature and humidity sensor 7 is ATMOS 14VP-4, the temperature range is 0-100℃, and the humidity range is 1% RH-99% RH. The brand and model of the pressure sensor 8 is Shanghai Di Jia Sensor DJYZ-15, and the range is 0-10 bar.

[0040] The heat preservation layer in the wall of the environment box is used to ensure the temperature in the environment box. In this embodiment, the material of the heat preservation layer is one of rock wool, glass wool and quartz wool, and the heating element is a metal electric heating element or a non-metal electric heating element. The heating element is powered to heat and the heating temperature can be controlled by a temperature controller. The heating element and the temperature controller are both known in the art. In this embodiment, the heating temperature range of the heating element is 20-100℃.

[0041] One side of the environment box is provided with an exhaust port 6 for exhausting residual gas inside, as shown in Figures 1-2As shown, the exhaust port 6 is provided with an exhaust baffle outside, and the upper end of the exhaust baffle is hinged to the environment box body through a folding page so as to realize free swing. Figure 1 As shown, when the exhaust baffle is lowered, the exhaust port 6 is blocked to seal the inside of the environment box body, and a sealing ring can be provided on the circumference of the exhaust port 6 to abut against the exhaust baffle to ensure the sealing effect. Figure 2 As shown, when the exhaust baffle is lifted, the exhaust port 6 is exposed for exhaust. In order to ensure that the exhaust baffle is tightly attached to the box body, a counterweight can be provided on the lower side of the exhaust baffle to avoid that the airflow in the box body blows the baffle open. In the embodiment, the material of the exhaust baffle can be stainless steel, polytetrafluoroethylene, organic glass, etc., and the size is 5-50mmx5-50mm, and the shape is circular, arc, square or other irregular shape.

[0042] As shown in the figure, Figures 4-5 As shown, the spinning nozzle module 1 includes two structural forms of single slurry channel spinning nozzle and double slurry channel spinning nozzle, wherein the core liquid delivery channel 12 is arranged at the center of the nozzle base body 11. Figure 4 As shown, when the spinning nozzle module 1 is a single slurry channel spinning nozzle structure, the first slurry delivery channel 13 is arranged outside the core liquid delivery channel 12 in the inside of the nozzle base body 11. Figure 5 As shown, when the spinning nozzle module 1 is a double slurry channel spinning nozzle structure, the first slurry delivery channel 13 and the second slurry delivery channel 14 are arranged outside the core liquid delivery channel 12 in the inside of the nozzle base body 11.

[0043] The upper end of the core liquid delivery channel 12 is communicated with a core liquid storage device, and the upper end of each slurry delivery channel is communicated with a slurry storage device. The lower end of the core liquid delivery channel 12 and the lower end of each slurry delivery channel form a spinning hole. The core source storage device and the slurry storage device are known in the art.

[0044] When the spinning nozzle module 1 is a single slurry channel spinning nozzle structure, the core liquid delivered by the core liquid delivery channel 12 can be one or more of water, ethanol, polyammonium solution, acyl chloride solution, etc., and the slurry delivered by the first slurry delivery channel 13 can be one or more of polysulfone, polyether sulfone, polyvinylidene fluoride, polyethylene imine, polyacrylonitrile, perovskite, spinel, fluorite, etc.

[0045] When the spinning nozzle module 1 is a double-solution channel spinning nozzle structure, the core liquid delivered by the core liquid delivery channel 12 can be one or several of water, ethanol, polyammonium solution, acyl chloride solution, etc., the solution delivered by the first solution delivery channel 13 can be one or several of polysulfone, polyethersulfone, polyvinylidene fluoride, polyethylene imine, polyacrylonitrile, perovskite, spinel, fluorite, etc., and the solution delivered by the second solution delivery channel 14 can be one or several of polysulfone, polyethersulfone, polyvinylidene fluoride, polyethylene imine, polyacrylonitrile, perovskite, spinel, fluorite, etc.

[0046] As shown in Figures 2-3 , the spinning nozzle module 1 is arranged on a mounting frame body 10, and the mounting frame body 10 is detachably arranged on the upper end of the environmental box body of the gas gap environment control system 2. In this embodiment, the mounting frame body 10 is provided with a mounting bottom plate 101, and the spinning nozzle module 1 is fixed on the mounting bottom plate 101 through a pressing plate 102. The upper end of the environmental box body is provided with clamping grooves 201 on both sides, and the mounting bottom plate 101 is inserted into the corresponding clamping grooves 201 on both sides to realize connection. In this way, the mounting bottom plate 101 can be conveniently extracted and replaced to facilitate the replacement of the spinning nozzle module 1 with different numbers of channels. In addition, sealing pads or sealing rings can be arranged in the clamping grooves 201 to ensure the sealing of the inside of the environmental box body. The mounting frame body 10 can also be fixed on the upper end of the environmental box body by means of bolts or the like.

[0047] As shown in Figures 1-3 , an ultrasonic sensor 9 is arranged on the mounting bottom plate 101 for accurately measuring the distance between the ultrasonic sensor 9 and the coagulation bath. The mounting frame body 10 is arranged on a lifting device, so that the height of the gas gap environment control system 2 can be adjusted in real time according to the actual situation, thereby ensuring the film production quality. The ultrasonic sensor 9 is a commonly known technology in the art and is a commercially available product. The lifting device can adopt a motor + screw nut transmission mode to realize accurate control of the lifting height, thereby accurately adjusting the distance between the gas gap environment control system 2 and the coagulation bath. The screw is driven to rotate by the motor, and the screw nut is sleeved on the screw and is lifted along the screw. The screw nut is fixedly connected with the mounting frame body 10.

[0048] The working principle of the present application is as follows:

[0049] The application comprises a spinning nozzle module 1 and a gas gap environment control system 2, and the spinning nozzle module 1 is arranged on the upper end of the gas gap environment control system 2. In the hollow fiber membrane preparation process, the core liquid is input into the core liquid delivery channel 12 in the spinning nozzle module 1, and then flows out through the spinning nozzle at the lower end of the core liquid delivery channel 12 into the environment box of the gas gap environment control system 2. The slurry is input into the corresponding slurry delivery channel in the spinning nozzle module 1, and then flows out through the spinning nozzle at the lower end of the slurry delivery channel into the environment box of the gas gap environment control system 2. The materials in the environment box then enter the coagulation bath tank through the lower output port 5.

[0050] As shown in Figures 1-3 , the environment box is provided with a humidifying air inlet 3 and a dry gas inlet 4 for adjusting the humidity and air pressure inside the box. In addition, a plurality of environment detection sensors including a temperature and humidity sensor 7 and a pressure sensor 8 are arranged in the environment box to monitor the temperature, humidity, pressure and other parameters in the environment box in real time. A heat preservation layer is arranged in the wall of the environment box, and a heating element is arranged in the heat preservation layer. The heating temperature of the heating element can be adjusted in real time according to the monitoring of each environment detection sensor, so as to ensure that the environment parameters in the environment box meet the requirements, thereby ensuring the preparation efficiency and quality of the membrane.

[0051] As shown in Figures 4-5 , the spinning nozzle module 1 comprises a single slurry channel spinning nozzle and a double slurry channel spinning nozzle. The application can select spinning nozzles with different channel numbers according to actual needs, which is more flexible to use. The installation base plate 101 of the spinning nozzle module 1 is connected with the upper end clamping groove of the environment box through plug-in connection, so that the spinning nozzle can be conveniently disassembled and replaced.

[0052] In addition, as shown in Figures 2-3 , an ultrasonic sensor 9 is arranged on one side of the upper end of the gas gap environment control system 2 for accurately measuring the distance between the gas gap environment control system 2 and the coagulation bath. The spinning nozzle module 1 and the gas gap environment control system 2 are connected with the mounting frame 10, and the mounting frame 10 is arranged on a lifting device. In this way, the height of the gas gap environment control system 2 can be adjusted in real time according to the actual situation, and the distance between the gas gap environment control system 2 and the coagulation bath can be adjusted, so as to ensure the quality of the membrane.

[0053] The technical effects of the application will be further illustrated by one comparative example and one application example of the application.

[0054] Comparative example:

[0055] Preparation of polyether sulfone hollow fiber membrane: 0.5 g of polyvinylpyrrolidone dispersant is dissolved in 40 g of N-methylpyrrolidone solvent, then 7.5 g of polyether sulfone polymer is added, stirred for 24 h to obtain a casting solution, then the casting solution is injected into a slurry tank, vacuum degassed for 4 h, and then the casting solution is formed by a spinning nozzle under the driving of air with a pressure of 0.6 bar, and then enters a coagulation bath tank without passing through the gas gap environment control system 2, wherein the core liquid is a mixture of deionized water, the core liquid flow rate is 15 mL / min, and the external coagulation liquid is water; the hollow fiber membrane obtained above is placed in water for 24 h to make the phase inversion fully proceed, then naturally dried in air, and then placed in an oven for drying at 50℃ for 20 h to obtain a hollow fiber membrane.

[0056] The present comparative example does not pass through the gas gap environment control system 2, as shown in Figure 6 The hollow fiber membrane obtained above is subjected to scanning electron microscope characterization, the distribution of the finger-shaped pores in the cross section of the hollow fiber membrane is greatly affected by the environmental humidity, and the pore structure distribution of the surface skin layer is uneven.

[0057] Application example of the present application:

[0058] Preparation of polyether sulfone hollow fiber membrane: 0.5 g of polyvinylpyrrolidone dispersant is dissolved in 40 g of N-methylpyrrolidone solvent, then 7.5 g of polyether sulfone polymer is added, stirred for 24 h to obtain a casting solution, then the casting solution is injected into a slurry tank, vacuum degassed for 4 h, and then the casting solution is formed by a spinning nozzle under the driving of air with a pressure of 0.6 bar, and then enters a coagulation bath tank after passing through the gas gap environment control system 2, wherein the internal parameters of the environment box of the gas gap environment control system 2 are set as follows: humidity is 45%, temperature is 26℃, pressure is 0 bar, core liquid is a mixture of deionized water, core liquid flow rate is 15 mL / min, and external coagulation liquid is water. The hollow fiber membrane obtained above is placed in water for 24 h to make the phase inversion fully proceed. Then naturally dried in air, and then placed in an oven for drying at 50℃ for 20 h to obtain a hollow fiber membrane.

[0059] The present application example passes through the gas gap environment control system 2, as shown in Figure 7 The hollow fiber membrane obtained above is subjected to scanning electron microscope characterization, the distribution of the finger-shaped pores in the cross section of the hollow fiber membrane is greatly affected by the environmental humidity, and the pore structure distribution of the surface skin layer is uneven.

Claims

1. A spinning nozzle assembly having a gas gap environment controllable function, characterized by: The application relates to a spinning nozzle module (1) and a gas gap environment control system (2), wherein the gas gap environment control system (2) comprises an environment box and a plurality of environment detection sensors arranged in the environment box; a humidifying air inlet (3) and dry air inlets (4) are arranged on the upper portion of the environment box; an output port (5) is arranged at the lower end of the environment box; a heat preservation layer is arranged in the wall of the environment box; heating elements and a temperature controller are arranged in the heat preservation layer; the spinning nozzle module (1) is arranged on the upper end of the environment box; the spinning nozzle module (1) comprises a nozzle base body (11); a core liquid conveying channel (12) and a slurry conveying channel are arranged in the nozzle base body (11). The humidifying air inlet (3) on the environment box is communicated with a first air flow generating device and a humidity generating device; the dry air inlets (4) on the environment box are communicated with a second air flow generating device; The lower end of the core liquid conveying channel (12) and the lower end of each slurry conveying channel form a spinning hole; The spinning nozzle module (1) is arranged on a mounting rack (10), and the mounting rack (10) is detachably arranged on the upper end of the environment box of the gas gap environment control system (2); The mounting rack (10) is provided with a mounting bottom plate (101); the spinning nozzle module (1) is fixed on the mounting bottom plate (101) through a pressing plate (102); clamping grooves (201) are arranged on the two sides of the upper end of the environment box; and the two sides of the mounting bottom plate (101) are respectively inserted into the corresponding clamping grooves (201). An ultrasonic sensor (9) is arranged on the mounting bottom plate (101), and the mounting rack (10) is arranged on a lifting device.

2. The spinhead assembly having a controllable gaseous gap environment function according to claim 1, characterized in that: The environment detection sensors in the environment box comprise a temperature and humidity sensor (7) and a pressure sensor (8).

3. The spinning jet head assembly having a gas gap environment controllable function according to claim 1, characterized by: An exhaust port (6) is arranged on one side of the environment box.

4. The spinhead assembly having a controllable gaseous gap environment function according to claim 3, wherein: An exhaust baffle is arranged outside the exhaust port (6), and the upper end of the exhaust baffle is hingedly connected with the environment box.

5. The spinhead assembly having a controllable gaseous gap environment function according to claim 1, wherein: The spinning nozzle module (1) is a single slurry channel spinning nozzle; the nozzle base body (11) is provided with a core liquid conveying channel (12) and a first slurry conveying channel (13); the core liquid conveying channel (12) is arranged at the center of the nozzle base body (11); and the first slurry conveying channel (13) is arranged outside the core liquid conveying channel (12).

6. The spinhead assembly having a controllable gaseous gap environment function according to claim 1, wherein: The spinning nozzle module (1) is a double slurry channel spinning nozzle; the nozzle base body (11) is provided with a core liquid conveying channel (12), a first slurry conveying channel (13) and a second slurry conveying channel (14); the core liquid conveying channel (12) is arranged at the center of the nozzle base body (11); the first slurry conveying channel (13) is arranged outside the core liquid conveying channel (12); and the second slurry conveying channel (14) is arranged outside the first slurry conveying channel (13).

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