A singling and defoaming device and process for carbon fiber polymerization production

Abstract

The application discloses a single-removing and defoaming device and process for carbon fiber polymerization production, which comprises a cylinder, the inner cavity of the cylinder is provided with a plurality of positive umbrella-shaped parts, a plurality of inverted umbrella-shaped parts and a feed distributor, the positive umbrella-shaped parts and the inverted umbrella-shaped parts are coaxial and are arranged in an upper and lower interval mode, the outer contour of the inverted umbrella-shaped part is larger than that of the positive umbrella-shaped part, and the lower end of the inverted umbrella-shaped part forms a downflow port; the feed distributor is located on the upper side of the uppermost positive umbrella-shaped part and is used for distributing stock solution on the upper surface of the positive umbrella-shaped part; the cylinder is provided with a stock solution feeding port, a discharge port and a vacuum air outlet, the stock solution feeding port is located at the top of the cylinder and is communicated with the feed distributor, the discharge port is located at the bottom of the cylinder, and the vacuum air outlet is communicated with a negative pressure source and is used for vacuumizing the cylinder. The single-removing and defoaming treatment of the carbon fiber polymer stock solution can be realized efficiently and stably.

Description

Technical Field

[0001] This invention relates to the field of carbon fiber precursor production technology, and more specifically, to a degassing and debubbling device for carbon fiber polymerization production, and to a degassing and debubbling process for carbon fiber polymerization. Background Technology

[0002] Carbon fiber is a high-strength, high-modulus, temperature-resistant, and corrosion-resistant fiber material widely used in aerospace, military, and civilian fields, making it an excellent material. The superior properties of carbon fiber are mainly determined by the precursor fiber. In the precursor fiber production process, the removal of monomers and degassing of the spinning solution are the main processes. Less residual monomers and a bubble-free spinning solution are key to producing high-quality precursor fibers.

[0003] Currently, the degassing and debubbling devices used in the carbon fiber polymerization production process mainly include the following types:

[0004] One type is the dynamic rotary scraping film device. This type of device mainly uses a rotating combination scraper or scraper to evenly scrape the polymer liquid entering the tower onto the inner wall of the tower. The raw liquid forms a thin film layer on the inner wall, and the monomers or bubbles are removed by controlling the jacket water temperature and the vacuum degree in the tower. However, the rotary scraping method has low processing efficiency for polymer liquid, and the inner wall of the tower is prone to forming a skin or gel, so the monomer removal effect is generally average.

[0005] The second type is the static film-forming device. This type of device mainly uses the design of the feed distributor to allow the raw liquid to flow down the inner wall of the tower with a certain slope and form a film on the inner wall of the tower. At the same time, under high vacuum and a certain temperature, the degassing and defoaming are completed. In actual production, the inner wall of the tower is prone to forming a crust, which can easily cause uneven film formation of the raw liquid and lead to unstable product quality.

[0006] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a degassing and debubbling device and process for carbon fiber polymerization production.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A degassing and de-bubbling device for carbon fiber polymerization production includes a cylindrical body. The inner cavity of the cylindrical body is provided with a plurality of upright umbrella-shaped components, a plurality of inverted umbrella-shaped components, and a feed distributor. The upright and inverted umbrella-shaped components are coaxial and spaced apart vertically. The outer periphery of the inverted umbrella-shaped components is larger than that of the upright umbrella-shaped components, and the lower end of the inverted umbrella-shaped components forms a downward flow port. The feed distributor is located above the uppermost upright umbrella-shaped component and is used to distribute the raw liquid onto the upper surface of the upright umbrella-shaped component.

[0010] The cylinder is provided with a raw liquid inlet, a discharge outlet, and a vacuum extraction port. The raw liquid inlet is located at the top of the cylinder and is connected to the feed distributor. The discharge outlet is located at the bottom of the cylinder. The vacuum extraction port is connected to a negative pressure source for drawing a vacuum inside the cylinder.

[0011] The present invention is further configured such that the positive umbrella-shaped component and the inverted umbrella-shaped component are coaxially fixedly installed on the umbrella-shaped component fixing shaft, and the lower end of the inverted umbrella-shaped component forms an annular downward flow port surrounding the umbrella-shaped component fixing shaft.

[0012] The present invention is further configured such that a conical lower end cap is provided at the bottom of the cylinder, and the discharge port is located at the bottom of the conical lower end cap; the taper of the conical lower end cap is 15~45°;

[0013] The present invention is further configured such that the internal mirror polishing of the cylinder is Ra≤0.4μm, and the material is 304 or 316L.

[0014] The present invention is further configured such that a jacket is provided on the outer wall of the cylinder, and the jacket is provided with a jacket heat medium inlet and a jacket heat medium outlet;

[0015] The invention is further configured such that the jacket is used to circulate a heat medium, the temperature range of which is 60~120℃.

[0016] The present invention is further configured such that the feed distributor is in the shape of an annular tube, and the feed distributor has a plurality of feed holes evenly provided; the feed distributor is connected to at least two feed pipes as the feed inlet of the raw liquid.

[0017] The present invention is further configured such that the number of feed holes is 4 to 72, and the hole diameter ranges from 0.5 to 10 mm;

[0018] The present invention is further configured such that the surface of the feed distributor is mirror polished with Ra≤0.4μm and the material is 304 or 316L.

[0019] The present invention is further configured such that the cylinder is also provided with a solvent nozzle assembly, the solvent nozzle assembly including a plurality of nozzles, each nozzle being evenly distributed in a ring on the upper side of the uppermost positive umbrella-shaped component.

[0020] The invention is further configured such that the nozzle is a solid cone-shaped nozzle with a spray angle of 65~90°, and the number is 4~12;

[0021] The invention is further configured such that the surface of the nozzle is mirror-polished with a thickness Ra ≤ 0.4 μm, and the material is 304 or 316L.

[0022] The present invention is further configured such that the solvent nozzle assembly is used to spray solvent into the stock solution inside the cylinder, wherein the solvent is dimethyl sulfoxide (DMSO), dimethylformamide (DMF), or dimethylacetamide (DMAc).

[0023] This invention also provides a process for removing monomers and bubbles in carbon fiber polymerization. Using the above-mentioned device, the raw liquid is guided by alternating layers of positive and negative umbrella-shaped components, so that the raw liquid forms a thin film. Then, by using vacuum and heating, the raw liquid is flash-evaporated, which can realize the separation of monomers and bubbles in the raw liquid.

[0024] In summary, the present invention has the following beneficial effects:

[0025] By using multiple alternating layers of positive and negative umbrella-shaped components, the raw material liquid can be guided by the outer circumferential surface of the positive umbrella-shaped component and the inner circumferential surface of the negative umbrella-shaped component. When flowing over the surface of the umbrella-shaped component, the raw material liquid will be thinned to form a thin film structure. With the help of the vacuum and heating environment inside the cylinder, flash evaporation can be achieved, which helps to achieve the degassing and defoaming treatment of the raw material liquid.

[0026] By installing multiple sets of solvent nozzles inside the cylinder, solvent can be intermittently sprayed onto the distributor and the outer surface of the positive umbrella shape, which can wet and replenish the extracted solvent and prevent the surface of the components from forming a skin; at the same time, it can control the stability of the solid content of the original liquid. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a degassing and debubbling device for carbon fiber polymerization production in Example 1.

[0028] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3 This is a schematic diagram of the structure of the upright umbrella-shaped component and the inverted umbrella-shaped component in Embodiment 2;

[0030] Figure 4 for Figure 3 Enlarged view at point B in the middle;

[0031] Figure 5 This is a schematic diagram of the structure of the upright umbrella-shaped component and the inverted umbrella-shaped component in Embodiment 3;

[0032] Figure 6 for Figure 5 Enlarged view of point C in the middle.

[0033] Reference numerals: 1. Raw material inlet; 2. Solvent nozzle assembly; 21. Nozzle; 3. Vacuum extraction port; 4. Elliptical upper end cap; 5. Umbrella-shaped fixing shaft; 6. Feed distributor; 7. Positive umbrella-shaped component; 8. Inverted umbrella-shaped component; 81. Downflow port; 82. Guide sleeve; 83. Annular guide gap; 84. Through groove; 841. Through groove extension; 9. Cylinder; 10. Jacket; 11. Conical lower end cap; 12. Jacket heat medium inlet; 13. Jacket heat medium outlet; 14. Discharge port; 15. Receiving component; 151. Lower end; 152. Upper end; 16. Buffer gap; 17. Moving part; 171. Sliding sleeve; 172. Notch. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1

[0036] This embodiment discloses a debubbling and degassing device for carbon fiber polymerization production, referring to... Figure 1 As shown, it includes a cylindrical body 9, which is generally cylindrical in shape. An elliptical upper end cap 4 is installed at the upper end of the cylindrical body 9 to seal and cover the upper end. A conical lower end cap 11 is welded and fixed at the lower end of the cylindrical body 9. The conical lower end cap 11 is an inverted conical structure.

[0037] A raw liquid inlet 1 and a vacuum extraction port 3 are provided at the upper end of the cylinder 9, and a discharge port 14 is provided at the lower end of the cylinder 9. The raw liquid inlet 1 can supply the raw liquid required for degassing and defoaming treatment, while the discharge port 14 can output the treated raw liquid; the vacuum extraction port 3 is connected to an external vacuum device to perform vacuum treatment on the inner cavity of the cylinder 9.

[0038] A jacket 10 is installed on the outer wall of the cylinder 9. The jacket 10 has a jacket heat medium inlet 12 and a jacket heat medium outlet 13. The heat medium (such as hot water, heat transfer oil, etc.) can be input from the jacket heat medium inlet 12 and output from the jacket heat medium outlet 13, thus heating the cylinder 9. Steam can also be used as the heat medium; in this case, steam needs to be input from the upper outlet and output from the lower outlet, i.e., according to… Figure 1 As shown, the positions of inlet 12 and outlet 13 need to be reversed.

[0039] During the circulation of the heat transfer medium, the temperature range can be controlled between 60 and 120°C, and the specific temperature can be adjusted according to the treatment requirements.

[0040] A vertically oriented umbrella-shaped fixing shaft 5 is fixed in the middle of the inner cavity of the cylinder 9. Several upright umbrella-shaped components 7 and several inverted umbrella-shaped components 8 are coaxially fixed at the fixing shaft 5. The upright umbrella-shaped components 7 have a structure that is smaller at the top and larger at the bottom, while the inverted umbrella-shaped components 8 have a structure that is larger at the top and smaller at the bottom. Both the upright umbrella-shaped components 7 and the inverted umbrella-shaped components 8 can be made of thin metal sheets. The upright umbrella-shaped components 7 and the inverted umbrella-shaped components 8 are coaxial and spaced apart vertically. Among all the upright umbrella-shaped components 7 and inverted umbrella-shaped components 8, the uppermost umbrella-shaped component is the upright umbrella-shaped component 7.

[0041] The outer periphery of the inverted umbrella-shaped member 8 is larger than that of the upright umbrella-shaped member 7; that is, the diameter of the upper large end of the inverted umbrella-shaped member 8 is slightly larger than the diameter of the lower large end of the upright umbrella-shaped member 7. Furthermore, a flow outlet 81 is formed at the lower end of the inverted umbrella-shaped member 8, located at the root of the lower end. The umbrella-shaped member fixing shaft 5 passes through the flow outlet 81, and the outer diameter of the umbrella-shaped member fixing shaft 5 is smaller than the inner diameter of the flow outlet 81. An annular slit is formed between the flow outlet 81 and the umbrella-shaped member fixing shaft 5.

[0042] Furthermore, referring to Figure 2 As shown, in this embodiment, a guide sleeve 82 is integrally connected to the lower end of the outlet 81 on the lower side of the inverted umbrella-shaped member 8. The upper contour of the guide sleeve 82 is consistent with the contour of the outlet 81, and the guide sleeve 82 can form a downwardly extending sleeve-shaped structure at the lower end of the outlet 81. The guide sleeve 82 is fitted onto the outer periphery of the umbrella-shaped member fixing shaft 5, and an annular guide gap 83 is formed between the outer periphery of the umbrella-shaped member fixing shaft 5 and the inner periphery of the guide sleeve 82. Through the annular guide gap 83, it can extend downward at the lower end of the outlet 81. During the downward flow of the raw liquid, the raw liquid can smoothly flow down the outer periphery of the umbrella-shaped member fixing shaft 5 to the upper side of the lower upright umbrella-shaped member 7.

[0043] A feed distributor 6 is also installed inside the cylinder 9. The feed distributor 6 is located on the upper side of the uppermost positive umbrella-shaped component 7. The feed distributor 6 can distribute the raw liquid onto the upper surface of the positive umbrella-shaped component 7. After the raw liquid is distributed on the upper surface of the positive umbrella-shaped component 7, it will flow down along the positive umbrella-shaped component 7 and the inverted umbrella-shaped component 8 in sequence by gravity. It will first fall from the outer periphery of the positive umbrella-shaped component 7, and then fall into the inner periphery of the lower inverted umbrella-shaped component 8. It will flow down along the inner periphery surface of the inverted umbrella-shaped component 8, and then flow out from the lower outlet 81 of the lower inverted umbrella-shaped component 8. It will then fall into the outer surface of the lower positive umbrella-shaped component 7, and flow down along the positive umbrella-shaped component 7 and the inverted umbrella-shaped component 8 in sequence.

[0044] As the concentrate flows downstream under gravity, a thin film forms on the surfaces of the upright umbrella-shaped component 7 and the inverted umbrella-shaped component 8. By alternating the upright umbrella-shaped component 7 and the inverted umbrella-shaped component 8, the concentrate flows sequentially over the outer surface of the upright umbrella-shaped component 7 and the inner surface of the inverted umbrella-shaped component 8, increasing the surface area of ​​the concentrate during flow. This, in turn, increases the surface area on which monomers and bubbles can detach. Furthermore, the thin film formed during the flow facilitates the removal of monomers and bubbles.

[0045] By drawing a vacuum from the vacuum extraction port 3, the inner cavity of the cylinder 9 is kept at a negative pressure range of 0.1~50 Kpa(A). With the help of the negative pressure state inside the cylinder 9, the raw liquid can be vacuum flash evaporated to quickly remove the residual monomers and bubbles in the raw liquid, and the raw liquid can be treated to remove monomers and bubbles.

[0046] In this embodiment, the taper of the positive umbrella-shaped component 7 and the inverted umbrella-shaped component 8 can be specifically set according to the flow state of the raw liquid. For example, it can be set to approximately 45° to ensure the normal flow of the raw liquid.

[0047] In this embodiment, the feed distributor 6 is an annular tube, which is installed approximately coaxially with the umbrella-shaped fixing shaft 5. A plurality of feed holes are evenly distributed around the outer periphery of the feed distributor 6. These evenly distributed feed holes allow the concentrate to be evenly distributed outwards, ensuring a relatively uniform distribution of the concentrate on the outer periphery of the uppermost umbrella-shaped component 7. Specifically, the diameter of the feed holes ranges from 0.5 to 10 mm, and the number ranges from 4 to 72, depending on the amount of concentrate being fed.

[0048] At least two feed pipes are fixedly connected to the feed distributor 6, and the feed pipes serve as raw liquid inlets 1. The feed pipes extend upward from the feed distributor 6, pass through the outer side of the elliptical upper end cap 4 of the cylinder 9, and are fixed to the elliptical upper end cap 4, so that the feed distributor 6 can be fixedly supported through the feed pipes.

[0049] In this embodiment, the taper of the conical lower end cap 11 is 15~45°, and the discharge port 14 is located at the bottom of the conical lower end cap 11. The conical lower end cap 11 can guide the raw liquid to the discharge port 14. The raw material flows to the discharge port 14 and is discharged by the discharge pump. The specific settings can be adjusted according to the air pressure to ensure that the raw liquid can be discharged smoothly.

[0050] To ensure that the raw liquid can flow smoothly in the inner cavity of the cylinder 9 and on the surfaces of other components, the inner wall of the cylinder 9 and the surfaces of other components, such as the surfaces of various pipe fittings, the positive umbrella-shaped component 7, the inverted umbrella-shaped component 8, and the umbrella-shaped component fixing shaft 5, are all mirror-polished, requiring the mirror polishing Ra≤0.4μm; the material can be 304 or 316L.

[0051] Furthermore, to prevent the raw liquid from forming a skin on the surface of the components it flows over and to control the solid content of the raw liquid to a stable state, in this embodiment, several sets of solvent nozzle assemblies 2 are installed in the cylinder 9. Each solvent nozzle assembly 2 has several nozzles, and each nozzle is evenly distributed in a ring on the upper side of the uppermost positive umbrella-shaped component 7. The solvent nozzle assembly 2 can spray solvent onto the surface of the positive umbrella-shaped component 7, which can wet the raw liquid, prevent the raw liquid from forming a skin on the surface of the components, and replenish the solvent extracted by negative pressure in the raw liquid, thus maintaining the stability of the solid content of the raw liquid.

[0052] In this embodiment, the nozzles in the solvent nozzle assembly 2 are solid cone-shaped nozzles with a spray angle of 65~90°, and the number is 4~12. The specific number can be set according to the flow rate of the raw liquid and the specific parameters in the degassing and defoaming processes. The surfaces of each component in the solvent nozzle assembly 2 can also be treated with mirror polishing similar to that described above, requiring a mirror polishing Ra≤0.4μm; the material can also be 304 or 316L.

[0053] In this embodiment, the solvent sprayed by the solvent nozzle assembly 2 can be dimethyl sulfoxide (DMSO), dimethylformamide (DMF), or dimethylacetamide (DMAc), as long as it meets the requirements for replenishing the original solution. Alternatively, other suitable materials can be selected as solvents.

[0054] This embodiment also discloses a degassing and debubbling process for carbon fiber polymerization, which uses the degassing and debubbling device for carbon fiber polymerization production as described in the above embodiment, and is operated in conjunction with the process-supporting system. The process-supporting system includes a raw material feeding system and a material discharging system, a vacuum system, a jacketed heat transfer medium system, a solvent supply system, etc.

[0055] The steps for removing monosodium and defoaming from the original solution are as follows:

[0056] First, start the vacuum system and evacuate the inner cavity of the cylinder 9 through the vacuum extraction port 3 to establish a vacuum environment in the inner cavity, with the vacuum degree controlled at 0.5~1Kpa; second, start the jacketed heat medium system and deliver hot water at about 80℃ into the jacket 10, and stabilize the temperature of the inner cavity of the cylinder 9 by adjusting its flow rate.

[0057] The raw liquid feeding system is started, and raw liquid is fed into the inner cavity of the cylinder 9 through the raw liquid inlet 1. The flow rate is controlled. The raw liquid is evenly distributed on the outer surface of the umbrella-shaped part 7 by the feed distributor 6, forming a raw liquid film of uniform thickness on the umbrella surface. Under the dual action of vacuum and heat medium heating, the residual monomers and bubbles in the raw liquid are flash evaporated and quickly removed from the raw liquid.

[0058] DMSO is selected as the solvent. When the DMSO solvent supply system is started, DMSO solvent can be sprayed onto the surface of the uppermost positive umbrella-shaped part 7 inside the inner cavity of the cylinder 9 through the solvent nozzle assembly 2 installed on the upper part of the cylinder 9. By adjusting the appropriate flow rate of DMSO solvent, the solvent can wet the original solution and prevent the original solution from desolventizing and forming a skin on the assembly. At the same time, the replenished solvent can balance the amount of DMSO extracted from the original solution and ensure the stability of the solid content of the original solution.

[0059] The raw liquid flows downwards along the perimeter of the upright umbrella-shaped part 7 using its own gravity, and flows into the inverted umbrella-shaped part 8 below. It will also form a uniform film on the inner surface of the inverted umbrella-shaped part 8. Then it flows into the annular slit between the lower outlet 81 of the inverted umbrella-shaped part 8 and the fixed shaft 5 of the umbrella-shaped part, and flows again to the next upright umbrella-shaped part. This process continues, passing through the series combination of each upright umbrella-shaped part 7 and inverted umbrella-shaped part 8, until the raw liquid flows through the last upright umbrella-shaped part 7. Then it is buffered in the conical lower end cap 11 at the lower end of the cylinder 9, and the liquid level is maintained at 20~30% in the conical lower end cap 11.

[0060] A discharge port 14 is provided at the center of the lower end of the conical lower head 11. The discharge port is connected to the discharge pipe, and the discharge pipe is connected to the discharge pump. The raw liquid after degassing and de-foaming is discharged through the discharge pump and enters the next process. The installation height of the tower discharge port 14 needs to take into account the influence of the large air leg to ensure continuous discharge.

[0061] Example 2

[0062] This embodiment discloses a debubbling and degassing device for carbon fiber polymerization production, which is based on Embodiment 1 and further refers to... Figure 3 , Figure 4 Please provide a detailed explanation.

[0063] Since the inner circumferential surface of the lower side of the inverted umbrella-shaped component 8 is smaller than that of the inner circumferential surface of the upper side, the thickness of the raw liquid will gradually increase during the flow from the inverted umbrella-shaped component 8. Moreover, since the gap of the outlet 81 is small, it cannot flow downward in time. This will cause the raw liquid to accumulate at the lower side of the inverted umbrella-shaped component 8. The raw liquid cannot form a thinner state at the accumulation point, which will affect the dispersion efficiency of monomers and bubbles in the raw liquid.

[0064] This embodiment also includes several receiving components 15, each of which has an inverted umbrella shape and corresponds one-to-one with each inverted umbrella component 8. A receiving component 15 is provided on the underside of each inverted umbrella component 8. The receiving component 15 and the inverted umbrella component 8 are concentrically fitted onto the outside of the umbrella component fixing shaft 5; a certain interval is formed between the receiving component 15 and the inverted umbrella component 8, forming a buffer gap 16.

[0065] The receiving member 15 has an inverted umbrella-shaped structure, with a lower end 151 pointing downwards and an upper end 152 pointing upwards, gradually tapering from top to bottom. The lower end 151 of the receiving member 15 is fitted onto the outer periphery of the flow guide sleeve 82. Several through grooves 84 are formed on the outer periphery of the flow guide sleeve 82, penetrating both the inner and outer sides of the flow guide sleeve 82, and the height of the through grooves 84 is higher than that of the lower end 151 of the receiving member 15; the through grooves 84 extend upwards to the lower end of the inverted umbrella-shaped member 8, forming a through groove extension 841 at the lower end of the inverted umbrella-shaped member 8, which also penetrates both the upper and lower sides of the inverted umbrella-shaped member 8.

[0066] In this embodiment, the raw liquid flows down from the lower edge of the upright umbrella-shaped member 7 into the inverted umbrella-shaped member 8, and gradually flows down from the upper edge of the inverted umbrella-shaped member 8, gradually entering the lower end of the inverted umbrella-shaped member 8. At the lower end of the inverted umbrella-shaped member 8, the raw liquid can increase the flow port at the lower end of the inverted umbrella-shaped member 8 through the through groove 84 on the outer wall of the guide sleeve 82 and the through groove extension 841 at the lower end of the inverted umbrella-shaped member 8, so that the raw liquid can flow down at a faster speed. Some of the raw liquid can enter the receiving member 15, and due to the obstruction of the receiving member 15, some of the raw liquid can be stored in the buffer gap 16 between the receiving member 15 and the inverted umbrella-shaped member 8. In addition, some of the raw liquid can be slowly discharged from the lower end of the guide sleeve 82 and enter the upper part of the upright umbrella-shaped member 7, and continue to flow down along the upright umbrella-shaped member 7, forming a thin layer of raw liquid on the upright umbrella-shaped member 7, which can effectively realize the processing of raw liquid de-bubbling and degassing.

[0067] The upper end 152 of the receiving part 15 is higher than the through groove extension 841. The receiving part 15 can store a portion of the original liquid in the buffer gap 16, which can reduce the liquid level at the lower end of the inverted umbrella-shaped part 8, thereby reducing the accumulation of liquid on the lower side of the inverted umbrella-shaped part 8. It can also form a thinner original liquid state at the lower side of the inverted umbrella-shaped part 8, which is more conducive to defoaming and de-bubbling.

[0068] Example 3

[0069] This embodiment discloses a debubbling and degassing device for carbon fiber polymerization production, which is based on Embodiment 2 and further refers to... Figure 5 , Figure 6 Please provide a detailed explanation.

[0070] This embodiment also includes several movable parts 17, which are installed between the receiving part 15 and the inverted umbrella-shaped part 8. The shape and outline of the movable parts 17 are consistent with the shape and outline of the receiving part 15, and they also have an inverted umbrella shape. Specifically, the shape of the lower surface of the movable parts 17 and the shape of the upper surface of the receiving part 15 can fit together.

[0071] The movable component 17 is fitted around the outer periphery of the umbrella-shaped component fixing shaft 5 and can slide up and down along the umbrella-shaped component fixing shaft 5. A fixing frame is connected to the outside of the movable component 17, and the movable component 17 can be adjusted up and down by a telescopic rod, so that the movable component 17 can move up and down normally. The telescopic rod can extend outside the cylinder 9, and a seal can be used at the connection between the cylinder 9 and the telescopic rod to maintain the pressure state inside the cylinder 9.

[0072] Furthermore, a sliding sleeve 171 is integrally fixedly connected to the inner circumference of the movable part 17. The sliding sleeve 171 slides and adapts to the umbrella-shaped fixed shaft 5, ensuring smooth lifting and lowering of the movable part 17. During the descent of the movable part 17, the lower side of the movable part 17 can apply a squeezing force to the original liquid carried on the upper side of the receiving part 15, so that the original liquid on the upper side of the receiving part 15 can be flattened and spread evenly between the movable part 17 and the receiving part 15, and can adhere to the surface of the movable part 17 and the receiving part 15, which is more conducive to the removal of bubbles and condensation of the original liquid. Moreover, after the movable part 17 and the receiving part 15 squeeze each other, the movable part 17 can be moved upward again, so that the movable part 17 and the receiving part 15 can separate from each other. The original liquid in the buffer gap 16 can slide downward along the conical surface of the movable part 17 and the receiving part 15 again. During the flow process, the time for the original liquid to spread and remain can be extended, thereby enabling more effective removal of bubbles and condensation.

[0073] Furthermore, the sliding sleeve 171 is provided with several notches 172, which penetrate the inner and outer sides of the sliding sleeve 171, facilitating the flow of the original liquid at the sliding sleeve 171; moreover, the sliding sleeve 171 extends outward in the peripheral direction to the inner periphery of the movable member 17, facilitating the flow of the original liquid to the upper side of the movable member 17 and enabling the smooth flow of the original liquid.

[0074] When the movable part 17 is adjusted to its lowest position, some of the original liquid flowing downward from the inverted umbrella-shaped part 8 can flow through the channel 84 and the notch 172 to the upper side of the movable part 17. By adjusting the movable part 17, after the movable part 17 reaches a certain height, the movable part 17 and the receiving part 15 can separate from each other, and the original liquid on the movable part 17 can flow downward. The original liquid can be spread and circulated on the surface of the movable part 17 and the receiving part 15, thereby effectively spreading and circulating the original liquid in the buffer gap 16, which is beneficial to improving the effect of original liquid defoaming.

[0075] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A device for degassing and de-bubbling in carbon fiber polymerization production, characterized in that, The device includes a cylinder (9), the inner cavity of which is provided with a plurality of positive umbrella-shaped parts (7), a plurality of inverted umbrella-shaped parts (8) and a feed distributor (6). The positive umbrella-shaped parts (7) and the inverted umbrella-shaped parts (8) are coaxial and spaced apart vertically. The outer periphery of the inverted umbrella-shaped parts (8) is larger than that of the positive umbrella-shaped parts (7). The lower end of the inverted umbrella-shaped parts (8) forms a downflow port (81). The feed distributor (6) is located on the upper side of the uppermost positive umbrella-shaped parts (7) and is used to distribute the raw liquid onto the upper surface of the positive umbrella-shaped parts (7). The cylinder (9) is provided with a raw liquid inlet (1), a discharge port (14) and a vacuum extraction port (3). The raw liquid inlet (1) is located at the top of the cylinder (9) and is connected to the feed distributor (6). The discharge port (14) is located at the bottom of the cylinder (9). The vacuum extraction port (3) is connected to a negative pressure source and is used to evacuate the inside of the cylinder (9). The positive umbrella-shaped component (7) and the inverted umbrella-shaped component (8) are both coaxially fixedly installed on the umbrella-shaped component fixing shaft (5), and the lower end of the inverted umbrella-shaped component (8) forms an annular downward flow port (81) surrounding the umbrella-shaped component fixing shaft (5); It also includes several receiving parts (15), which are in the shape of an inverted umbrella and correspond one-to-one with each inverted umbrella part (8). A receiving part (15) is provided on the underside of each inverted umbrella part (8). The receiving part (15) and the inverted umbrella part (8) are concentrically fitted on the outside of the umbrella part fixing shaft (5). A buffer gap (16) is formed between the receiving part (15) and the inverted umbrella part (8). The receiving part (15) has an inverted umbrella-shaped structure, with a lower end (151) facing downward and an upper end (152) facing upward, and gradually narrows from top to bottom; the lower end (151) of the receiving part (15) is fitted onto the outer periphery of the flow guide sleeve (82); a number of through grooves (84) are provided on the outer periphery of the flow guide sleeve (82), the through grooves (84) penetrate the inner and outer sides of the flow guide sleeve (82), and the height of the through grooves (84) is higher than the lower end (151) of the receiving part (15); the through grooves (84) extend upward to the lower end of the inverted umbrella-shaped part (8), and a through groove extension (841) is formed at the lower end of the inverted umbrella-shaped part (8), the through groove extension (841) also penetrates the upper and lower sides of the inverted umbrella-shaped part (8).

2. The degassing and debubbling device for carbon fiber polymerization production according to claim 1, characterized in that, The bottom of the cylinder (9) is provided with a conical lower end cap (11), and the discharge port (14) is located at the bottom of the conical lower end cap (11); the taper of the conical lower end cap (11) is 15~45°; The internal mirror polishing of the cylinder (9) is Ra≤0.4μm, and the material is 304 or 316L.

3. The degassing and debubbling device for carbon fiber polymerization production according to claim 1, characterized in that, The outer wall of the cylinder (9) is provided with a jacket (10), and the jacket (10) is provided with a jacket heat medium inlet (12) and a jacket heat medium outlet (13); The jacket (10) is used to circulate heat medium, and the temperature range of the heat medium is 60~120℃.

4. The degassing and debubbling device for carbon fiber polymerization production according to claim 1, characterized in that, The feed distributor (6) is in the shape of an annular tube, and the feed distributor (6) has a plurality of feed holes evenly opened; the feed distributor (6) is connected to at least two feed pipes as the raw liquid feed inlet (1).

5. The degassing and debubbling device for carbon fiber polymerization production according to claim 4, characterized in that, The number of feed holes is 4 to 72, and the hole diameter ranges from 0.5 to 10 mm; The surface of the feed distributor (6) is mirror polished with Ra≤0.4μm and the material is 304 or 316L.

6. The degassing and debubbling device for carbon fiber polymerization production according to claim 1, characterized in that, The cylinder (9) is also provided with a solvent nozzle assembly (2), which includes a plurality of nozzles, each nozzle being evenly distributed in a ring on the upper side of the uppermost positive umbrella-shaped component (7).

7. The degassing and debubbling device for carbon fiber polymerization production according to claim 6, characterized in that, The nozzles are solid cone-shaped nozzles with a spray angle of 65~90°, and the number is 4~12; The nozzle has a mirror-polished surface with Ra≤0.4μm and is made of 304 or 316L material.

8. The degassing and debubbling device for carbon fiber polymerization production according to claim 6, characterized in that, The solvent nozzle assembly (2) is used to spray solvent into the cylinder (9) to the original liquid. The solvent is dimethyl sulfoxide (DMSO), dimethylformamide (DMF), or dimethylacetamide (DMAc).

9. A process for removing monomers and bubbles in carbon fiber polymerization, characterized in that, The apparatus described in any one of claims 1-8 is used.

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