Wet-process carbon fiber precursor production system and control method thereof

Abstract

The invention provides a wet-process carbon fiber precursor production system and a control method thereof.The wet-process carbon fiber precursor production system comprises a plurality of production lines used for producing precursor polymers, and an intercommunication assembly is arranged between suspended polymer slurry intermediate tanks of every two production lines; and the intercommunication assembly is used for selectively connecting or disconnecting the suspended polymer slurry intermediate tanks of the two production lines. According to the invention, by introducing the intercommunication assembly, flexible suspension polymer slurry transmission between production lines is realized; when a production variety of a certain production line needs to be replaced or the production line needs to be maintained and overhauled, suspended polymer slurry of the production line is transferred to another production line through the intercommunication assembly, so that generation of foreign products caused by shutdown and cleaning is avoided, and the cleanliness and the production efficiency of polymers are remarkably improved. In addition, due to the organic integration of a plurality of production lines, the overall production balance capacity is enhanced, the dependence on a single production line is reduced, meanwhile, the labor intensity is reduced, and the operation safety is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of wet-process carbon fiber production, and in particular relates to a wet-process carbon fiber precursor production system, and also relates to a control method for the wet-process carbon fiber precursor production system. Background Art

[0002] The existing wet-process carbon fiber precursor production system usually consists of multiple independently operated production lines, each of which is dedicated to the production of a specific type of precursor polymer. Although the design of this independent production line can ensure high stability and product quality in the production of a single variety, it has significant limitations in multi-variety production and production line maintenance. Specifically, when it is necessary to change the product variety or perform maintenance and overhaul on a production line, it is usually necessary to suspend the operation of the production line to clean the suspended polymer slurry and adjust the process parameters. This not only leads to a decrease in production efficiency, but may also produce a large number of substandard polymers that do not meet specifications due to improper operation or incomplete cleaning, increasing the complexity and uncertainty of the production process.

[0003] In addition, there is a lack of effective suspended polymer slurry transmission mechanism between production lines in the existing wet-process carbon fiber precursor production system, which leads to inefficiency in the preparation of suspended polymer slurry between production lines and difficulty in achieving rapid and flexible production adjustments. The transmission of suspended polymer slurry usually relies on manual operation or inefficient conveying systems, which not only increases labor costs but also increases safety risks during operation. For example, during the switching process of suspended polymer slurry, manual cleaning and connection of pipes can easily lead to chemical leakage or equipment damage, further increasing safety hazards in the production process.

[0004] Therefore, designing a wet-process carbon fiber precursor production system that can achieve flexible and efficient suspended polymer slurry transmission between multiple production lines has become a technical problem that technicians in this field urgently need to solve.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The present invention provides a wet-process carbon fiber precursor production system, aiming to solve the problems of low efficiency and high yield of substandard products in the existing wet-process carbon fiber precursor production system during multi-variety switching and production line maintenance.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] A wet carbon fiber precursor production system includes multiple production lines for producing precursor polymers. An intercommunication component is provided between the suspended polymer slurry intermediate tanks of every two production lines. The intercommunication component is used to selectively connect or disconnect the suspended polymer slurry intermediate tanks of the two production lines.

[0009] Further, the intercommunication component includes an intercommunication pipeline, and an on-off valve is provided on the intercommunication pipeline;

[0010] Preferably, the interconnecting pipeline is also provided with a transport flow meter for monitoring and adjusting the flow of the polymer slurry suspended in the interconnecting pipeline;

[0011] Preferably, a pressure sensor is also provided on the interconnecting pipeline for monitoring and adjusting the pressure of the slurry suspended in the interconnecting pipeline.

[0012] Further, at least one interconnecting pipeline extending in the horizontal direction is provided between the suspended polymer slurry intermediate tanks of every two production lines, and a power component is provided on the interconnecting pipeline, and the power component is used to transport the suspended polymer slurry; or, at least two interconnecting pipelines inclined downward in the transport direction are provided between the suspended polymer slurry intermediate tanks of every two production lines, so as to realize the mutual transport of the suspended polymer slurry between the two production lines;

[0013] Preferably, a power component is provided on the interconnecting pipes inclined downward in the conveying direction;

[0014] Preferably, the inclination angle of the downwardly inclined interconnecting pipe is greater than 3 degrees.

[0015] Furthermore, spiral pipe sections are provided at intervals on the interconnecting pipes, and spiral ribs and / or spiral metal coils are provided on the inner walls of the spiral pipe sections.

[0016] Furthermore, the interconnecting pipeline includes a plurality of interconnected straight pipe sections and curved pipe sections, and the spiral pipes are arranged at intervals on the straight pipe sections; flanges are provided at the connection between the straight pipe sections and the curved pipe sections;

[0017] Preferably, the flange and the bent pipe section are integrally formed;

[0018] Preferably, an observation port is provided above the flange for observing the polymer suspended in the interconnecting pipe. Slurry status.

[0019] Further, each production line comprises a reactor, a separation device and a post-treatment device which are sequentially connected by connecting pipes, and an intermediate tank for suspended polymer slurry is arranged between the separation device and the post-treatment device;

[0020] Preferably, the connecting pipeline between the separation device and the intermediate tank of the suspended polymer slurry is an inclined pipeline, and the inclined pipeline is arranged to be inclined downward along the conveying direction.

[0021] Further, the post-treatment device comprises a filtering device and a drying device which are connected in sequence through a connecting pipeline, and the intercommunication component is arranged upstream of the filtering device through an intermediate tank of suspended polymer slurry;

[0022] Preferably, a post-processing interconnection pipeline extends from the connection pipeline between the filtering device and the drying device of one production line, and the other end of the post-processing interconnection pipeline is connected to the connection pipeline between the filtering device and the drying device of another production line.

[0023] Furthermore, it also includes a centralized control system, which is used to control the connection or disconnection of the intercommunication components.

[0024] Another object of the present invention is to provide a wet-process carbon fiber precursor production system, characterized in that it includes multiple sets of production equipment, and interconnecting components are provided between the multiple sets of production equipment. The interconnecting components are used to selectively connect or disconnect the suspended polymer slurry intermediate tanks of two production lines between different production equipment.

[0025] Another object of the present invention is to provide a control method for a wet-process carbon fiber precursor production system, using the wet-process carbon fiber precursor production system;

[0026] When the production line needs to be overhauled and / or the spinning polymer type needs to be replaced, the connection downstream of the suspended polymer slurry intermediate tank of the production line is disconnected, and the intercommunication components are opened to transport the suspended polymer slurry to another production line producing the same spinning polymer type; and / or, when the composition ratio of the spinning polymer needs to be adjusted, the connection downstream of the suspended polymer slurry intermediate tank of the production line is disconnected, and the intercommunication components are opened to transport the suspended polymer slurry to another production line producing a different spinning polymer type.

[0027] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0028] 1. The present invention realizes flexible transmission of suspended polymer slurry between production lines by setting an intercommunication component that can be selectively connected or disconnected between the suspended polymer slurry intermediate tanks of each two production lines. When a production line needs to change its product type or perform maintenance and overhaul, its suspended polymer slurry is transferred to another production line through the intercommunication component, thereby avoiding the production of substandard products caused by shutdown and cleaning, and significantly improving the cleanliness and production efficiency of the polymer. In addition, the organic integration of multiple production lines enhances the overall production balance capability, reduces dependence on a single production line, reduces labor intensity, and improves operational safety.

[0029] 2. The present invention sets an inclined pipeline from the downstream end of the separation device to the slurry intermediate tank at a certain downward inclination angle, and the inclination angle is greater than 3 degrees, so that the slurry can flow naturally from top to bottom into the slurry intermediate tank, which is beneficial to maintaining the fluidity of the slurry, avoiding the accumulation or adhesion of particles in a certain place of the pipeline to cause blockage, and is also beneficial to reducing the formation of local dead zones; it can also avoid when the production conditions change or the production line needs to be shut down intermittently, because the connecting pipeline is inclined downward, most of the residual materials can be discharged before the shutdown, thereby reducing the difficulty of cleaning and maintenance.

[0030] 3. The present invention arranges spiral pipe sections at intervals, and arranges spiral ribs and / or spiral metal coils on the inner wall of the spiral pipe sections, so that the slurry generates a composite flow in the axial and tangential directions when passing through. This design helps to slow down the tendency of solid particles to accumulate on the pipe wall or bottom, and reduces the risk of forming slurry stagnation areas in the pipeline, thereby improving the uniformity and stability of the transportation of suspended polymer slurry.

[0031] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0033] Figure 1 This is a schematic diagram of the process flow of a wet-process carbon fiber precursor production system according to an embodiment of the present invention;

[0034] Figure 2 It is a schematic diagram of the process flow of a wet-process carbon fiber precursor production system in another embodiment of the present invention.

[0035] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0037] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] like Figure 1 to Figure 2 As shown, this embodiment provides a wet carbon fiber precursor production system, including multiple production lines for producing precursor polymers, and an intercommunication component is provided between the suspended polymer slurry intermediate tanks of each two production lines, and the intercommunication component is used to selectively connect or disconnect the suspended polymer slurry intermediate tanks of the two production lines. Further, each production line operates independently, and the suspended polymer slurry can be transmitted between the production lines through the intercommunication component.

[0040] Specifically, in this embodiment, the interconnecting component includes an interconnecting pipe, on which an on-off valve is provided; the interconnecting pipe is used to physically connect the suspended polymer slurry intermediate tanks of every two production lines, and the on-off valve is used to control the on-off state of the interconnecting pipe, thereby selectively achieving connection or disconnection between every two production lines.

[0041] Furthermore, in this embodiment, a centralized control system is also included, and the centralized control system is used to control the connection or disconnection of the intercommunication components.

[0042] Furthermore, the interconnecting pipes of the interconnecting components adopt a fully enclosed design with a smooth inner wall, which is suitable for conveying suspended polymer slurry and preventing siltation or blockage in the interconnecting pipes. The on-off valve is automatically operated through a centralized control system and can be flexibly opened or closed according to production needs, realizing the selective transmission of suspended polymer slurry between different production lines.

[0043] In the above embodiment, by setting up intercommunication components, the suspended polymer slurry of one production line can be transferred to the slurry intermediate tank of another production line without affecting the normal operation of other production lines, thereby avoiding production interruption or waste of suspended polymer slurry, and significantly improving the production efficiency and system flexibility of the wet-process carbon fiber precursor production system.

[0044] Preferably, in this embodiment, a delivery flow meter is also provided on the interconnecting pipeline to monitor and adjust the flow of the polymer slurry suspended in the interconnecting pipeline; the delivery flow meter can collect the suspended polymer slurry flow data in real time and feed it back to the centralized control system. Furthermore, a centrifugal pump connected to a variable frequency motor is provided on the interconnecting pipeline to achieve the delivery of the suspended polymer slurry. When the flow rate is detected to be too high or too low, the centralized control system can accurately control the delivery speed of the suspended polymer slurry by adjusting the opening degree of the on-off valve or the speed of the centrifugal pump to ensure the uniformity and stability of the transmission of the suspended polymer slurry.

[0045] Preferably, in this embodiment, a pressure sensor is also provided on the interconnecting pipeline to monitor and adjust the pressure state of the suspended slurry in the interconnecting pipeline. Specifically, the pressure data acquired in real time by the pressure sensor is also transmitted to the centralized control system. When the centralized control system detects that the pressure in the interconnecting pipeline is abnormal (for example, too high pressure may cause blockage or too low pressure may affect the transmission efficiency), the pressure in the pipeline can be kept within the set range by adjusting the working parameters of the centrifugal pump or changing the state of the on-off valve.

[0046] In this embodiment, by configuring a transport flow meter and a pressure sensor on the interconnecting pipeline, real-time monitoring and dynamic adjustment of the transmission process of the suspended polymer slurry are achieved, effectively avoiding the blockage of the interconnecting pipeline or the abnormal flow of the suspended polymer slurry, and improving the reliability of transmission and the stability of production. The centralized control system can optimize the flow path of the suspended polymer slurry according to real-time data, reduce waste and improve overall production efficiency.

[0047] In this embodiment, at least one interconnecting pipeline extending in a horizontal direction is arranged between the suspended polymer slurry intermediate tanks of every two production lines, and a power component is provided on the interconnecting pipeline, which is used to transport the suspended polymer slurry; or, at least two interconnecting pipelines inclined downward in the transport direction are arranged between the suspended polymer slurry intermediate tanks of every two production lines, which are used to realize mutual transport of the suspended polymer slurry between the two production lines.

[0048] Specifically, in this embodiment, at least one interconnecting pipeline extending in the horizontal direction is provided between the intermediate tanks of the suspended polymer slurry of each two production lines. The interconnecting pipeline is connected to the intermediate tanks of the two production lines through a closed pipeline, and is used to realize the transmission of the suspended polymer slurry between the two production lines. In order to overcome the flow resistance in the horizontal direction, a power component is provided on the interconnecting pipeline. The power component is a centrifugal pump, which is driven by a variable frequency motor and can provide sufficient power to drive the suspended polymer slurry to flow in the horizontally arranged interconnecting pipeline.

[0049] In actual operation, the start of the power component is regulated by the centralized control system based on the monitoring data of the conveying flow meter and pressure sensor. When horizontal conveying is required, the centrifugal pump is started and adjusted to the appropriate speed to ensure that the suspended polymer slurry can pass through the interconnecting pipes at a uniform speed without sedimentation or blockage.

[0050] Specifically, in this embodiment, at least two interconnecting pipes inclined downward along the conveying direction are provided between the suspended polymer slurry intermediate tanks of each two production lines; the downwardly inclined interconnecting pipes can directly use their own gravity to assist in the transmission of the suspended polymer slurry, effectively reducing the dependence on power equipment. The inclination angle of the interconnecting pipes is preferably greater than 3 degrees to maintain the stable flow of the suspended polymer slurry, avoid particle deposition, and reduce turbulence caused by excessive flow rate of the suspended polymer slurry.

[0051] In the above specific embodiments, in order to provide additional power when gravity conveying is insufficient or precise flow control is required, a power component is preferably provided on the interconnecting pipes inclined downward along the conveying direction. The power component can cooperate with the pressure sensor and make real-time adjustments through the centralized control system to ensure stable and continuous transmission of the suspended polymer slurry in the interconnecting pipes.

[0052] In other preferred embodiments, a horizontally arranged interconnecting pipeline and an interconnecting pipeline inclined downward along the conveying direction are configured between every two production lines to meet the diversified suspended polymer slurry transmission requirements between different production lines. For example, between two production lines that are far apart horizontally, an interconnecting pipeline extending in the horizontal direction is preferentially used, and the power is provided by a centrifugal pump; and between adjacent production lines, an interconnecting pipeline inclined downward along the conveying direction is preferentially used. The setting of multiple interconnecting pipelines provides greater flexibility and adaptability for the switching of production lines, the preparation of suspended polymer slurry, and process optimization.

[0053] Through the above design, this embodiment not only realizes the efficient transmission of suspended polymer slurry between multiple production lines, but also optimizes energy consumption by combining gravity and power components, thereby improving the stability of production system operation and production efficiency.

[0054] In this embodiment, spiral pipe sections are provided at intervals on the interconnecting pipes, and spiral ribs and / or spiral metal coils are provided on the inner walls of the spiral pipe sections.

[0055] In this embodiment, the interconnecting pipes include a plurality of interconnected straight pipe segments and curved pipe segments, and the spiral pipes are arranged at intervals on the straight pipe segments; flanges are provided at the connection between the straight pipe segments and the curved pipe segments.

[0056] Specifically, in this embodiment, the interconnecting pipeline is composed of a plurality of straight pipe segments and curved pipe segments connected to each other, the straight pipe segments are used for long-distance material transmission, and the curved pipe segments are used to adjust the direction of the interconnecting pipeline to adapt to the layout requirements of the production line. The spiral pipe segments are arranged at intervals on the straight pipe segments to improve the flow state of the suspended polymer slurry, avoid particle deposition, and improve the transmission efficiency.

[0057] More specifically, in this embodiment, a plurality of spiral pipe sections are arranged at intervals on the interconnecting pipe. The spiral pipe sections are connected to the straight pipe sections of the interconnecting pipe and have a spiral shape, which is used to improve the flow state of the suspended polymer slurry and avoid particle deposition or blockage during the transmission of the suspended polymer slurry.

[0058] Specifically, in this embodiment, the spiral ribs are spiral protrusions distributed along the inner wall of the interconnected pipe, which can guide the suspended polymer slurry to generate a rotating flow when it flows through, thereby effectively reducing the risk of particle deposition on the inner wall of the interconnected pipe. The spiral metal coil is embedded or fixed on the inner wall of the spiral pipe section, and its function is similar to that of the spiral ribs, and it can also guide the suspended polymer slurry to form a spiral flow, thereby enhancing the mixing effect of the materials.

[0059] In this embodiment, the design of the spiral pipe section significantly improves the material transmission efficiency of the interconnected pipeline. Through the guiding effect of the spiral ribs or spiral metal coils, the flow pattern of the suspended slurry when passing through the pipeline is transformed from the traditional laminar flow to a mixed rotational flow and turbulent flow. This flow pattern not only effectively prevents the deposition of particles in the low-speed area or bottom of the pipeline, but also improves the mixing uniformity of the material in the pipeline, which helps to improve the material consistency in the subsequent processing links.

[0060] During operation, when the suspended polymer slurry enters the spiral section from the straight section, the spiral ribs or spiral metal coils guide the change of its flow path, thus forming a spiral flow in the pipeline. At this time, even if the flow rate in the pipeline is low, the particles can remain suspended to avoid accumulation or blockage. At the same time, this spiral flow can significantly improve the mixing uniformity and stability of the materials, ensuring the efficiency and reliability of the transmission process.

[0061] In this embodiment, in order to facilitate the connection between the straight pipe segment and the curved pipe segment, a flange is provided at the connection between the straight pipe segment and the curved pipe segment. The flange provides reliable sealing performance and facilitates the disassembly, cleaning and maintenance of the interconnected pipes.

[0062] Preferably, in this embodiment, the flange and the bent pipe section are integrally formed to reduce potential leakage points at the connection parts and improve the mechanical strength and sealing performance of the interconnecting pipes.

[0063] Further preferably, in this embodiment, an observation port is provided above the flange for observing the flow state of the suspended polymer slurry in the interconnecting pipe. The observation port is made of a transparent material, and the operator can visually judge the material flow state in the interconnecting pipe through the observation port, which is convenient for timely adjustment or maintenance under abnormal conditions.

[0064] In this embodiment, each production line includes a reactor, a separation device and a post-processing device connected in sequence through a connecting pipeline, and the suspended polymer slurry intermediate tank is arranged between the separation device and the post-processing device; the reactor is used to perform a polymerization reaction to generate a suspended polymer slurry; the separation device performs preliminary separation on the suspended polymer slurry to remove unreacted substances and by-products; the post-processing device further processes the slurry to meet the spinning requirements. Furthermore, the separation device is a stripping tower; and a silo for storing the treated polymer is also provided downstream of the post-processing device.

[0065] Specifically, in this embodiment, the suspended polymer slurry intermediate tank is arranged between the separation device and the post-processing device, and is used to temporarily store the suspended polymer slurry processed by the separation device, and plays a buffering and regulating role. Preferably, the suspended polymer intermediate tank is equipped with a liquid level sensor and a temperature control system, which are used to monitor the storage state of the suspended polymer slurry and ensure its fluidity and processing performance.

[0066] Preferably, in this embodiment, the connecting pipe between the separation device and the suspended polymer slurry intermediate tank is designed as an inclined pipe. The inclined pipe is arranged to be inclined downward along the conveying direction, and gravity is used to assist material transmission, reducing the dependence on power equipment. Preferably, the inclination angle of the inclined pipe is optimized to ensure that the smooth flow of materials can be maintained while avoiding the deposition of slurry particles.

[0067] In some specific embodiments, the connecting pipeline includes a connecting straight section and a connecting curved section, and a flange is provided between the connecting straight section and the connecting curved section; preferably, connecting spiral sections are provided at intervals on the connecting straight section, and the structure of the connecting spiral section is the same as that of the spiral pipe section.

[0068] In actual operation, after the separation device completes the treatment of the suspended polymer slurry, the suspended polymer slurry flows into the suspended polymer intermediate tank through the inclined pipeline. The use of gravity conveying not only reduces the energy consumption of the power equipment, but also ensures the continuous flow of materials. At the same time, the storage and regulation of the suspended polymer slurry by the suspended polymer intermediate tank further improves the stability and production efficiency of the subsequent processes, realizes efficient material transmission, and significantly optimizes the overall operation performance of the production line.

[0069] In this embodiment, the post-processing device includes a filtering device and a drying device which are connected in sequence through connecting pipes, and the interconnecting pipes of the interconnecting components are arranged upstream of the filtering device through a suspended polymer slurry intermediate tank; the filtering device mainly removes fine particles and impurities in the slurry, and the drying device further processes the filtered material to adjust its moisture content so that the suspended polymer slurry can meet the process requirements required for spinning.

[0070] Specifically, in this embodiment, after the suspended polymer slurry is processed by the separation device, it is temporarily stored in the suspended polymer slurry intermediate tank and selectively transmitted to the suspended polymer slurry intermediate tank of another production line or the filtering device inlet of the post-processing device through the interconnecting components, thereby realizing flexible allocation of materials.

[0071] Preferably, in this embodiment, a post-processing interconnection pipeline extends from the connection pipeline between the filter device and the drying device of a certain production line, and the other end of the post-processing interconnection pipeline is connected to the connection pipeline between the filter device and the drying device of another production line. When the post-processing device of a certain production line needs to be maintained or switched, the post-processing interconnection pipeline can be opened through the centralized control system to achieve the transmission of the suspended polymer slurry upstream of the post-processing devices of the two production lines, thereby ensuring the continuity of the treatment of the suspended polymer slurry.

[0072] In a specific embodiment, when the drying device of the first production line needs to be repaired, the slurry treated by the filtering device of the first production line can be transferred to the drying device of the second production line for drying by opening the post-processing interconnection pipeline, thereby avoiding production interruption or material waste. The design of the post-processing interconnection pipeline not only improves the flexibility and redundancy of the system, but also significantly improves the adaptability of the production line under special working conditions.

[0073] In this embodiment, when a production line needs to switch production varieties or perform maintenance, the centralized control system issues instructions according to the production plan, closes the connection between the suspended polymer slurry intermediate tank and the filtration device of the production line, and opens the interconnecting pipelines leading to other production lines to ensure that the suspended polymer slurry is smoothly transferred to the target production line. During the switching process, the control system can dynamically adjust the opening and closing degree of the on-off valve and the material flow speed according to the data of the flow meter and the pressure sensor to ensure the stability and safety of material transmission.

[0074] In another embodiment, the wet-process carbon fiber precursor production system includes multiple sets of production equipment, and interconnecting components are provided between the multiple sets of production equipment. Several production lines are configured in each set of production equipment, and the interconnecting components are used to selectively connect or disconnect the suspended polymer slurry intermediate tanks of two production lines between different production equipment.

[0075] In actual operation, when one of the production lines of a certain production unit needs to adjust the production plan, switch products or perform equipment maintenance, the suspended polymer slurry of the production line can be transferred to the suspended polymer slurry intermediate tank of a production line of another production unit by controlling the connectivity of the interconnection component. For example, when the first production line of the first production unit is suspended, the valve of the interconnection component is opened, and the suspended polymer slurry is transferred to the suspended polymer slurry intermediate tank of the third production line of the second production unit through the interconnection pipeline, thereby ensuring the continuity of material flow and avoiding the production of substandard products.

[0076] Furthermore, in this embodiment, the operation of the interconnected components is uniformly managed by a centralized control system. The system automatically adjusts the connectivity of the interconnected components according to the real-time monitored production status (such as liquid level, pressure, flow rate and other data) to ensure smooth and efficient transmission of the suspended polymer slurry between different production lines in the same production device or different production devices.

[0077] In this embodiment, when the production line needs to be overhauled and / or the spinning polymer variety needs to be replaced, the connection downstream of the suspended polymer slurry intermediate tank of the production line is disconnected, and the intercommunication component is opened to transport the suspended polymer slurry to another production line producing the same spinning polymer variety; and / or, when the composition ratio of the spinning polymer needs to be adjusted, the connection downstream of the suspended polymer slurry intermediate tank of the production line is disconnected, and the intercommunication component is opened to transport the suspended polymer slurry to another production line producing a different spinning polymer variety.

[0078] When the production line needs to be overhauled and / or the spinning polymer variety needs to be replaced, the centralized control system first disconnects the suspended polymer slurry intermediate tank of the production line that needs to be overhauled or replaced from the post-processing device to prevent the suspended polymer slurry from continuing to enter the production line. At the same time, the centralized control system opens the interconnection pipeline between other production lines producing the same spinning polymer variety to establish a material transmission channel. Subsequently, the suspended polymer slurry is transmitted to the suspended polymer slurry intermediate tank of the target production line through the interconnection pipeline, thereby avoiding the production of substandard products caused by shutdown and ensuring the continuity of production.

[0079] When it is necessary to adjust the composition ratio of the spinning polymer, the centralized control system opens the interconnecting pipes between the production lines of different spinning polymer varieties according to production requirements, so that different varieties of materials are mixed in the interconnecting pipes. Subsequently, the suspended polymer slurries of different varieties are transmitted to the intermediate tank of the target production line through the interconnecting pipes according to the predetermined proportions. During the process, the centralized control system adjusts the opening and closing state of the on-off valve and the running speed of the variable frequency motor according to the real-time data of the flow regulator and pressure sensor to ensure the stability of the flow and pressure of the material transmission, thereby achieving efficient and uniform mixing.

[0080] When the production line resumes operation, the centralized control system closes the interconnecting pipeline and stops the material mixing or transmission operation. Subsequently, the connection between the suspended polymer slurry intermediate tank of the original production line and the post-processing device is restored to ensure that the production line has normal operating conditions. Finally, the centralized control system starts the production line and continues to complete the subsequent spinning polymer production.

[0081] Through the above-mentioned implementation mode, the present invention realizes flexible regulation and efficient coordination between multiple production lines in the wet-process carbon fiber precursor production system, significantly improves production efficiency, reduces the generation of substandard products, and optimizes material utilization and system responsiveness.

[0082] The above description is only a comparative embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the present invention can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A wet-process carbon fiber precursor production system, characterized in that: It comprises a plurality of production lines for producing raw fiber polymers, and an intercommunication component is arranged between the suspended polymer slurry intermediate tanks of every two production lines, and the intercommunication component is used for selectively connecting or disconnecting the suspended polymer slurry intermediate tanks of the two production lines.

2. The wet-process carbon fiber precursor production system according to claim 1, characterized in that: The intercommunication component includes an intercommunication pipeline, and an on-off valve is arranged on the intercommunication pipeline; Preferably, the interconnecting pipeline is also provided with a transport flow meter for monitoring and adjusting the flow of the polymer slurry suspended in the interconnecting pipeline; Preferably, a pressure sensor is also provided on the interconnecting pipeline for monitoring and adjusting the pressure of the slurry suspended in the interconnecting pipeline.

3. The wet process carbon fiber precursor production system according to claim 2, characterized in that: At least one interconnecting pipeline extending in the horizontal direction is arranged between the suspended polymer slurry intermediate tanks of each two production lines, and a power component is arranged on the interconnecting pipeline, and the power component is used to transport the suspended polymer slurry; or, At least two interconnecting pipelines inclined downward in the conveying direction are arranged between the suspended polymer slurry intermediate tanks of each two production lines, so as to realize the mutual conveying of the suspended polymer slurry between the two production lines; Preferably, a power component is provided on the interconnecting pipes inclined downward in the conveying direction; Preferably, the inclination angle of the downwardly inclined interconnecting pipe is greater than 3 degrees.

4. The wet process carbon fiber precursor production system according to claim 3, characterized in that: Spiral pipe sections are arranged at intervals on the interconnecting pipes, and spiral ribs and / or spiral metal coils are arranged on the inner walls of the spiral pipe sections.

5. The wet process carbon fiber precursor production system according to claim 4, characterized in that: The interconnecting pipeline includes a plurality of interconnected straight pipe sections and curved pipe sections, and the spiral pipes are arranged at intervals on the straight pipe sections; flanges are arranged at the connection between the straight pipe sections and the curved pipe sections; Preferably, the flange and the bent pipe section are integrally formed; Preferably, an observation port is provided above the flange for observing the state of the polymer slurry suspended in the interconnecting pipe.

6. The wet process carbon fiber precursor production system according to any one of claims 1 to 5, characterized in that: Each production line comprises a reactor, a separation device and a post-treatment device which are sequentially connected by connecting pipes, and an intermediate tank for suspended polymer slurry is arranged between the separation device and the post-treatment device; Preferably, the connecting pipeline between the separation device and the intermediate tank of the suspended polymer slurry is an inclined pipeline, and the inclined pipeline is arranged to be inclined downward along the conveying direction.

7. The wet process carbon fiber precursor production system according to claim 6, characterized in that: The post-treatment device comprises a filtering device and a drying device connected in sequence by a connecting pipeline, and the intercommunication components are arranged upstream of the filtering device through an intermediate tank for suspended polymer slurry; Preferably, a post-processing interconnection pipeline extends from the connecting pipeline between the filtering device and the drying device of one production line, and the other end of the post-processing interconnection pipeline is connected to the connecting pipeline between the filtering device and the drying device of another production line.

8. The wet process carbon fiber precursor production system according to any one of claims 1 to 7, characterized in that: It also includes a centralized control system, which is used to control the connection or disconnection of the intercommunication components.

9. A wet-process carbon fiber precursor production system, characterized in that: It comprises a plurality of production devices, wherein intercommunication components are arranged between the plurality of production devices, and the intercommunication components are used for selectively connecting or disconnecting the suspended polymer slurry intermediate tanks of two production lines between different production devices.

10. A control method for a wet-process carbon fiber precursor production system, using the wet-process carbon fiber precursor production system according to any one of claims 1 to 9, characterized in that: When the production line needs to be overhauled and / or the spinning polymer type needs to be changed, disconnect the connection of the suspended polymer slurry intermediate tank downstream of the production line, and open the intercommunication component at the same time to transfer the suspended polymer slurry to another production line producing the same spinning polymer type; and / or, When the composition ratio of the spinning polymer needs to be adjusted, the connection of the suspended polymer slurry intermediate tank downstream of the production line is disconnected, and the intercommunication component is opened to transport the suspended polymer slurry to another production line producing different spinning polymer varieties.

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