Lyocell fiber glue solution viscosity modulation method, system, and related apparatus

Abstract

The application discloses a lyocell fiber glue solution viscosity modulation method and system and related equipment, and relates to the chemical fiber industry and the automatic control technical field. The application is applied to acquiring the running torque of a conveying pump when the conveying pump is conveying target material of a current batch; in the case that the running torque exceeds a preset qualified torque range, the quality proportioning coefficient of the current batch is adjusted according to the deviation direction of the running torque relative to the qualified torque range, and a target quality proportioning coefficient is obtained, so as to control the feeding proportioning of raw materials and solvents in a pulverizer in a next batch operation. According to the application, real-time feedback of viscosity information can be realized, and the viscosity deviating from the process target can be pulled back to the qualified range in time, so that problems, such as glue solution scrapping, caused by excessive viscosity can be avoided.

Description

Technical Field

[0001] This application relates to the chemical fiber industry and the field of automation control technology. More specifically, it relates to a method, system and related equipment for adjusting the viscosity of lyocell fiber adhesive. Background Technology

[0002] In the production of lyocell fibers, the viscosity of the spinning solution is a key indicator of its quality, directly affecting the physical properties of the finished fiber. To maintain the viscosity within the target range, current methods typically involve manual offline sampling and manual feedback adjustments. For example, samples of the spinning solution are periodically extracted from the discharge port at the bottom of the reactor and sent to a laboratory for viscosity and cellulose content determination using a rheometer. Based on the test results received approximately 1.5 hours later, the operator manually adjusts the solvent ratio in the pulverizing process, making what was originally a continuous production process reliant on intermittent test feedback for intervention.

[0003] Because there is a long time lag between sampling and obtaining test results, there is a significant lag when adjusting the existing solution, which can easily cause large fluctuations in the viscosity of the adhesive during the adjustment period. Summary of the Invention

[0004] In view of the above problems, this application is made to provide a method, system, and related equipment for viscosity modulation of lyocell fiber adhesive, which can be applied to solve the task of real-time viscosity control in the lyocell fiber production process, and meet the stability and automation characteristics of viscosity control in the adhesive production process. The specific solution is as follows:

[0005] In a first aspect, this application provides a method for modifying the viscosity of a Lyocell fiber adhesive, comprising:

[0006] The operating torque of the conveying pump when conveying the current batch of target material is obtained. The target material is obtained by mixing raw materials and solvents used to make lyocell fiber adhesive according to a preset mass ratio coefficient. The operating torque of the conveying pump is related to the flow characteristics of the conveyed material.

[0007] If the operating torque exceeds the preset qualified torque range, the mass ratio coefficient of the current batch is adjusted according to the deviation direction of the operating torque relative to the qualified torque range to obtain the target mass ratio coefficient, so as to control the feeding ratio of the raw materials and the solvent in the next batch of operation.

[0008] In one possible design, in another implementation of the first aspect of this application, the process of adjusting the mass ratio coefficient of the current batch according to the deviation direction of the operating torque relative to the qualified torque range to obtain the target mass ratio coefficient includes:

[0009] When the operating torque is greater than the right boundary value of the qualified torque range, the target quality ratio coefficient is obtained by increasing the weight ratio coefficient of the current batch according to the preset weight ratio coefficient adjustment range.

[0010] If the operating torque is less than the left boundary value of the qualified torque range, the target quality ratio coefficient is obtained by adjusting the preset ratio coefficient by reducing the ratio coefficient of the current batch.

[0011] In one possible design, in another implementation of the first aspect of the embodiments of this application, the process of obtaining the operating torque of the conveying pump when conveying the current batch of target material includes:

[0012] Obtain the torque sequence of the entire process of the conveying pump conveying the current batch of target material;

[0013] The average torque within a preset time window is calculated based on the torque sequence, and the average torque is used as the operating torque for the current batch.

[0014] In one possible design, in another implementation of the first aspect of the embodiments of this application, the process of obtaining the qualified torque range includes:

[0015] When the viscosity of the lyocell fiber adhesive solution is within the acceptable viscosity, the operating torque of the delivery pump is taken as the torque center value.

[0016] Based on the torque center value and the preset reasonable torque deviation value, the left and right boundary values ​​of the qualified torque range are determined.

[0017] In one possible design, in another implementation of the first aspect of the embodiments of this application, the method further includes:

[0018] Laboratory viscosity data of Lyocell fiber adhesive is collected at a preset cycle.

[0019] Based on the laboratory viscosity data, one or more of the following are calibrated and updated: qualified torque range, proportioning coefficient adjustment range, torque center value, and reasonable torque deviation value.

[0020] In one possible design, in another implementation of the first aspect of the embodiments of this application, when there are multiple consecutive batches of the operating torque exceeding the qualified torque range, the method further includes:

[0021] Record the total number of batches whose operating torque continuously exceeds the qualified torque range;

[0022] If the total number of batches exceeds the preset limit for compensation, the adjustment of the ratio coefficient will stop, and a safety warning message will be sent to the front end.

[0023] Secondly, this application provides a lyocell fiber adhesive viscosity modulation system, including: a control unit, a pulverizer, and a delivery pump;

[0024] The control unit is configured to implement the viscosity modulation method of lyocell fiber adhesive as described in any of the first aspects of this application, to obtain a target mass ratio coefficient, and to send the target mass ratio coefficient to the pulverizer;

[0025] The pulverizer is used to receive the target mass ratio coefficient, control the feeding ratio of raw materials and solvent in the pulverizer according to the target mass ratio coefficient, and pulverize and mix the raw materials and solvent to obtain the target material;

[0026] The conveying pump is used to convey the target material generated by the pulverizer to downstream components to produce lyocell fiber adhesive.

[0027] Thirdly, this application provides an electronic device, including: a memory and a processor;

[0028] The memory is used to store programs;

[0029] The processor is configured to execute the program to implement the viscosity modulation method for lyocell fiber adhesive as described in any of the first aspects of this application.

[0030] Fourthly, this application provides a readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the viscosity modulation method for lyocell fiber adhesive as described in any of the first aspects of this application.

[0031] Fifthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the viscosity modulation method for lyocell fiber adhesive as described in any of the first aspects of this application.

[0032] The viscosity modulation method for lyocell fiber adhesive provided in this application indirectly and continuously monitors the viscosity of the lyocell fiber adhesive made from the batch of raw materials by acquiring the operating torque of the screw pump during the current batch conveying process in real time and utilizing the correlation between the operating torque of the conveying pump and the flow characteristics of the conveyed material. This eliminates the need for offline testing using equipment such as rheometers, simplifying the testing process and enabling real-time feedback of viscosity information, thus providing a timely and reliable basis for subsequent adjustment operations.

[0033] Based on this, when the operating torque of the current batch exceeds the preset acceptable torque range, it indicates that the viscosity of the adhesive produced from the current batch of materials has deviated from the process target. At this point, according to the direction of the torque deviation relative to the acceptable torque range, the mass ratio of raw materials to solvent is adjusted according to the preset adjustment range. Finally, the adjusted target mass ratio is applied to the next batch of operations, so that the viscosity of the adhesive produced from the next batch of materials approaches the target range, promptly pulling the viscosity that deviates from the process target back to the acceptable range, and avoiding problems such as adhesive waste and production interruption due to excessive viscosity. Attached Figure Description

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0035] Figure 1 A schematic diagram of a lyocell fiber adhesive process provided for an embodiment of this application;

[0036] Figure 2 A schematic flowchart illustrating a method for modulating the viscosity of a lyocell fiber adhesive solution, provided as an embodiment of this application;

[0037] Figure 3 illustrates a comparison of the viscosity modulation effect of Lyocell fiber adhesive;

[0038] Figure 3(a) shows the effect of artificial modulation;

[0039] Figure 3(b) shows the effect of automatic modulation;

[0040] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] This application provides a method for modifying the viscosity of a lyocell fiber adhesive solution. The following is a detailed description of the method for modifying the viscosity of a lyocell fiber adhesive solution according to an embodiment of this application, with reference to the accompanying drawings.

[0043] See Figure 1 , Figure 1A schematic diagram of a Lyocell fiber adhesive process flow is shown. This process flow includes a Lyocell fiber adhesive viscosity modulation system, which comprises a control unit, a pulverizer, and a delivery pump. The following section provides a detailed description of the Lyocell fiber adhesive viscosity modulation system in conjunction with the Lyocell fiber adhesive process flow.

[0044] The pulverizer is the first key step in the production process of lyocell fiber adhesive, primarily responsible for processing the raw materials required for lyocell adhesive production and the specialized solvent prepared according to a preset mass ratio. The pulverizer first crushes the raw materials, then uniformly mixes the crushed materials with the solvent to ultimately obtain the secondary raw material, which is the target material mentioned in this article. This process can employ a batch feeding method, with the amount of raw materials and solvent added in a single batch flexibly determined based on actual production load and process standards. For example, according to process requirements, a single batch of 1000 kg of raw material can be quantitatively added to the pulverizer, and the amount of solvent added is calculated by multiplying the amount of raw material by the mixing ratio.

[0045] After the pulverizer completes the pulverization and mixing of raw materials, the conveying pump is started to transport the target material to the downstream equipment used to prepare lyocell fiber adhesive. For example... Figure 1 In the process, the target material is conveyed into a settling tank. After the target material is conveyed, the conveying pump stops running. Then, the feeding pump continuously conveys the target material from the settling tank into the reactor. After being processed in the reactor, the target material is used to obtain lyocell fiber adhesive, which is then conveyed to subsequent equipment by a discharge pump.

[0046] The crusher and conveying pump can be connected to a distributed control system (DCS) and automatically controlled by the DCS system to coordinate with production batches for intermittent batch operations, ensuring the stable progress of the process.

[0047] The control unit can take the form of, but is not limited to, embedded microcontrollers, programmable logic controllers, and industrial PCs. Optionally, the control unit can be integrated into the logic control layer of a DCS system. The programmable logic controller executes each step of the lyocell fiber adhesive viscosity modulation method provided in this application. By monitoring the operating torque of the delivery pump when conveying the target material, the viscosity of the lyocell fiber adhesive prepared from the target material is indirectly monitored, thereby timely adjusting the viscosity of the next batch of lyocell fiber adhesive prepared.

[0048] This application provides an embodiment of a lyocell fiber adhesive viscosity modulation method, which can be applied to a DCS system as an example. (Refer to...) Figure 2This application provides a schematic flowchart of a lyocell fiber adhesive viscosity modulation process, which may include steps S110 to S130. These steps are described in detail below.

[0049] Step S110: Obtain the operating torque of the conveying pump when conveying the target material of the current batch.

[0050] In this embodiment, the conveying pump can be a positive displacement pump whose operating torque is related to the flow characteristics of the conveyed material, such as a screw pump, gear pump, rotary pump, or cam pump. During the conveying process, these pumps achieve material conveying through the contact between mechanical components and the target material. Their operating load changes with the flow resistance of the target material, resulting in a corresponding change in the pump's operating torque. Therefore, when the flow resistance of the target material increases, the driving force required for the pump to overcome the material conveying resistance increases, and the operating torque increases accordingly; conversely, the operating torque decreases accordingly.

[0051] Based on this, this application considers the correlation between the flow resistance of the target material used to prepare the lyocell fiber adhesive and the viscosity of the subsequently formed lyocell fiber adhesive, and the flow resistance of the target material is reflected in the change of the operating torque of the transfer pump. Therefore, by collecting the operating torque of the transfer pump in real time during the transportation of the current batch of target material, the viscosity state of the adhesive corresponding to the current batch of target material can be indirectly reflected, thereby providing a basis for subsequent judgment on whether the adhesive viscosity meets the process requirements and whether the feeding ratio needs to be adjusted.

[0052] Taking a screw pump as an example, a screw pump consists of a meshing screw and a pump body. During operation, the screw rotates at high speed, forming a sealed cavity between the screw and the pump body. This cavity continuously moves from the feed end to the discharge end as the screw rotates, thus smoothly and continuously pushing the target material to subsequent process stages. Throughout the entire conveying process, the screw and the target material are in continuous contact and interact.

[0053] Therefore, the physical properties of the target material, such as viscosity and density, directly generate flow resistance that hinders screw rotation. This resistance acts entirely on the screw pump's drive structure, thus affecting its operating torque. In other words, the higher the viscosity of the target material, the greater the conveying resistance, and the greater the screw pump's operating torque; conversely, the lower the viscosity, the lower the torque. Torque is positively correlated with the viscosity of the target material. Therefore, by collecting the screw pump's operating torque, the viscosity information of the target material can be indirectly obtained, allowing for the deduction of whether the viscosity of the lyocell fiber adhesive prepared from the target material meets the process requirements. This provides fundamental data support for subsequent torque determination and proportioning adjustments.

[0054] In practical implementation, torque sensors can be installed on the screw or drive shaft of the screw pump to detect torque changes in real time and transmit the detected torque data to the control unit. Alternatively, the delivery pump can be connected to the DCS system via a communication bus. The DCS can collect the operating parameters of the delivery pump, such as input current, speed, and power, and calculate the torque data of the screw pump in the delivery pump in real time.

[0055] Based on the above implementation, the control unit records the torque sequence of the screw pump of the conveying pump throughout the entire process of conveying the current batch of target material. It then calculates the average torque within a preset time window based on the torque sequence and uses this average torque as the operating torque for the current batch. For example, if the conveying pump conveys each batch of target material for 4 minutes, and the torque sequence records the torque at each moment within those 4 minutes, the average torque within the 2nd to 3rd minute after each pump start is taken as the operating torque corresponding to each batch of target material.

[0056] In another possible implementation, based on the importance of the transport stage, corresponding weights are assigned to the torque data at different time points in the torque sequence, and a weighted average is calculated and used as the operating torque for the current batch. Alternatively, the torque sequence can be cleaned to remove abnormal torque data, and the remaining valid data can be averaged or used to calculate the mode to determine the final operating torque. The methods for obtaining the operating torque for each batch are merely illustrative in this application and are not intended to be the only limitation.

[0057] Step S120: Determine whether the operating torque exceeds the preset qualified torque range. If yes, proceed to step S130; otherwise, confirm that the viscosity of the lyocell fiber adhesive prepared in the current batch meets the process preparation requirements, and no adjustment is needed. The next batch will continue to be processed according to the mass ratio coefficient of the current batch.

[0058] The preset qualified torque range can be determined in advance through experiments and simulation calculations based on the process preparation requirements of lyocell fiber adhesive. This range corresponds to the range in which the lyocell fiber adhesive meets the production requirements. When the operating torque of the screw pump is within this range, it indicates that the proportion of the target material is reasonable and meets the production requirements for the adhesive viscosity.

[0059] In one possible implementation, the process of obtaining the qualified torque range may include: testing the operating torque of the screw pump in the delivery pump when the viscosity of the lyocell fiber adhesive is at the qualified viscosity, and using this torque as the center value; and determining the left and right boundary values ​​of the qualified torque range based on the center value of the torque and a preset reasonable torque deviation value.

[0060] First, according to the process preparation requirements of lyocell fiber adhesive, multiple sets of adhesive samples with viscosities within the qualified range are prepared. The target material corresponding to each set of adhesive samples with qualified viscosities is transported by a screw pump. The stable operating torque of the screw pump during the transport of each set of target materials is collected in real time. The arithmetic mean of multiple sets of torque data is taken, and this average value is determined as the torque center value, such as 120 N∙m. Subsequently, based on factors such as production process precision requirements, screw pump operating stability, and raw material characteristic fluctuation range, a reasonable fluctuation value, such as ±10 N∙m, is determined through multiple tests and verifications. Based on this torque center value and reasonable fluctuation value, a qualified torque range is determined. The left boundary value of the range = torque center value - torque reasonable deviation value, and the right boundary value = torque center value + torque reasonable deviation value. The range formed by these two values ​​is the preset qualified torque range [110, 130].

[0061] The aforementioned qualified torque range provides an accurate benchmark for the entire lyocell fiber adhesive viscosity modulation process. It precisely identifies whether the current batch of raw material proportions is reasonable and whether the adhesive viscosity meets the standards, guiding the direction and magnitude of proportion adjustment in step S130. This makes proportion adjustment more targeted, improving the efficiency and accuracy of proportion modulation. Furthermore, by using the center value of the qualified adhesive viscosity test torque, combined with setting reasonable deviation values ​​based on multiple factors, the qualified torque range not only meets the actual production process requirements but also adapts to actual production scenarios such as raw material characteristic fluctuations and screw pump operating deviations, ensuring the stability and reliability of the modulation process.

[0062] Based on the preset acceptable torque range, the operating torque of the screw pump obtained in step S110 is compared with the acceptable torque range, and different subsequent operations are performed according to the comparison result. If the comparison result shows that the actual operating torque is within the acceptable torque range, it indicates that the proportion of the target material in the current batch is qualified, and production can continue by maintaining the existing proportion coefficient. If the comparison result shows that the actual operating torque exceeds the acceptable torque range, it indicates that the proportion of the target material is unreasonable, and the viscosity of the adhesive at the production site cannot meet the production requirements. In this case, step S130 is executed to enter the proportion adjustment stage.

[0063] This step quickly determines whether the viscosity of the current batch of adhesive meets process requirements by comparing the torque with the acceptable range, preventing substandard adhesive from entering subsequent processes and reducing product scrap rates. Furthermore, through the aforementioned branch decision-making, closed-loop control of the production process is achieved, ensuring continuous production efficiency of qualified batches while promptly detecting abnormal proportions and providing trigger signals for subsequent adjustments.

[0064] Step S130: Adjust the mass ratio coefficient of the current batch according to the deviation direction of the operating torque from the qualified torque range to obtain the target mass ratio coefficient.

[0065] This step first clarifies the direction of deviation of the operating torque from the acceptable torque range. If the operating torque is greater than the right boundary of the acceptable torque range, the deviation is positive; if the operating torque is less than the left boundary, the deviation is negative. Based on the deviation direction, the mass ratio of the current batch is adjusted according to a preset adjustment range to obtain the target mass ratio. This target mass ratio is then transmitted to the crusher's control system to control the mass ratio of raw materials and solvents fed into the crusher in the next batch, correcting the viscosity of the adhesive produced in the next batch and ensuring the screw pump's operating torque returns to the acceptable torque range.

[0066] Understandably, if the operating torque deviates positively from the acceptable torque range, it indicates that the target material in the current batch is too viscous, causing significant flow resistance during transport and resulting in an operating torque higher than the acceptable range. Therefore, the mass ratio coefficient can be adjusted according to the preset ratio coefficient adjustment range to increase the amount of solvent added, thereby reducing the viscosity of the lyocell fiber adhesive. Conversely, if the operating torque deviates negatively from the acceptable torque range, it indicates that the target material in the current batch is too thin, generating less flow resistance during transport, allowing the screw pump to complete the transport task with an operating torque lower than the acceptable range. Therefore, the mass ratio coefficient can be adjusted according to the preset ratio coefficient adjustment range to reduce the amount of solvent added, thereby increasing the viscosity of the lyocell fiber adhesive.

[0067] For example, if the operating torque of the current batch is higher than 130 N·m, the mass ratio coefficient of the current batch (such as the normal ratio coefficient of 8.1 corresponding to an operating torque of 120 N·m) is automatically increased to 8.25 by an adjustment increment of 0.15; if the operating torque of the next batch is still higher than 130 N·m, it is increased again by 0.15 on the basis of 8.25 to obtain a target mass ratio coefficient of 8.4, which is used for the allocation operation of the next batch.

[0068] Similarly, when the operating torque of the current batch is lower than 110 N·m, the mass ratio coefficient of the current batch (e.g., the normal ratio coefficient of 8.1 corresponding to an operating torque of 120 N·m) is automatically adjusted down to 7.95 by an adjustment increment of 0.15; when the torque of the next batch is still lower than 110 N·m, it is adjusted down again by 0.15 on the basis of 7.95 to obtain a target mass ratio coefficient of 7.8, which is used for the allocation operation of the next batch.

[0069] In summary, the lyocell fiber adhesive viscosity modulation method provided in this application indirectly and continuously monitors the viscosity of the lyocell fiber adhesive made from the current batch of raw materials by acquiring the operating torque of the screw pump during the current batch's conveying process in real time and utilizing the correlation between the pump's operating torque and the flow characteristics of the conveyed material. This eliminates the need for offline testing using equipment such as rheometers, simplifying the testing process and providing real-time feedback of viscosity information, thus providing a timely and reliable basis for subsequent adjustment operations. Furthermore, when the operating torque of the current batch exceeds the preset acceptable torque range, it indicates that the viscosity of the adhesive made from the current batch of materials has deviated from the process target. At this point, based on the direction of torque deviation from the acceptable torque range, the mass ratio coefficient of the raw materials and solvent is adjusted according to a preset adjustment range. Finally, the adjusted target mass ratio coefficient is applied to the next batch of operations, bringing the viscosity of the adhesive made from the next batch of materials closer to the target range, promptly pulling the viscosity that deviates from the process target back to the acceptable range, and avoiding problems such as adhesive scrapping and production interruption due to excessive viscosity.

[0070] In addition, this method for modulating the viscosity of lyocell fiber adhesive requires no manual intervention, which can reduce human error, lower labor costs, and further improve the automation level and production efficiency of the entire viscosity modulation process.

[0071] Next, other possible implementations of the viscosity modulation method for Lyocell fiber adhesive provided in the embodiments of this application will be described in detail.

[0072] In one possible implementation, the viscosity modulation method for lyocell fiber adhesive may further include: collecting laboratory viscosity data of lyocell fiber adhesive at a preset period; and calibrating and updating one or more of the following based on the laboratory viscosity data: qualified torque range, adjustment range of mixing ratio coefficient, torque center value, and reasonable torque deviation value.

[0073] This process is a post-optimization step in the viscosity modulation method of lyocell fiber adhesive. It periodically verifies and corrects the preset parameters (qualified torque range, ratio coefficient adjustment range, torque center value, and reasonable torque deviation value) in the above method. It is independent of the single-batch real-time production control process and does not affect the normal operation rhythm of raw material transportation, torque detection, and ratio adjustment for each batch.

[0074] It is understood that the preset parameters used for viscosity modulation in this application are obtained under ideal conditions or specific testing conditions. However, due to factors such as equipment wear and tear and changes in raw materials and solvents, the viscosity of the adhesive modulated based on the original preset parameters will deviate from the expected viscosity. Furthermore, this deviation will gradually accumulate during continuous production, causing the original preset parameters to gradually lose their reference value. Therefore, this application proposes a process that allows for periodic verification and updating of the aforementioned parameters.

[0075] Specifically, this process first involves periodically sampling lyocell fiber adhesive samples prepared on the production line according to a pre-set time cycle. The measured viscosity data of the adhesive is then accurately obtained using standard laboratory testing equipment. Based on the deviation between the measured viscosity and the process standard viscosity, the matching relationship between the operating torque and the mixing ratio of the on-site equipment can be reverse-checked. This allows for the calibration, correction, and iterative updating of any one or more parameters, including the torque center value, reasonable torque deviation value, acceptable torque range, and the adjustment range of the mixing ratio, ensuring that the on-site online judgment logic always precisely matches the actual physical properties of the adhesive.

[0076] This process uses real laboratory viscosity data for regular calibration, which effectively offsets systematic deviations caused by various environments and equipment, ensuring the long-term accuracy of the detection correlation. Furthermore, periodic calibration updates enable dynamic iteration of key control parameters, avoiding problems such as inaccurate judgments, over-adjustment of proportions, or adjustment failures caused by long-term use of fixed parameters, ensuring that the viscosity control logic always aligns with actual field conditions.

[0077] In another possible implementation, when there are multiple consecutive batches of operating torque exceeding the qualified torque range, the method further includes: recording the total number of batches whose operating torque exceeds the qualified torque range; and when the total number of batches exceeds the preset limit compensation number, stopping the adjustment of the ratio coefficient and sending a safety warning message to the front end.

[0078] The preset limit compensation number can be set based on production process requirements, equipment debugging experience, and raw material characteristics, and can be verified through multiple experiments to define the effective boundary of the ratio adjustment.

[0079] Based on the preset limit compensation count, the operating torque determination results of each batch of screw pumps are monitored in real time. Batches whose operating torque continuously exceeds the preset qualified torque range are counted, and the total number of such batches is recorded. The recorded total number of batches is compared with the preset limit compensation count. If the total number of batches exceeds the preset value, it is determined that the current ratio adjustment cannot bring the operating torque back to the qualified torque range. At this time, the ratio adjustment operation in step S130 is immediately stopped, and a safety warning message is sent to the front-end control system (such as the production monitoring terminal or operator console) to remind relevant personnel to promptly investigate the cause of the abnormality and prevent the fault from escalating.

[0080] Next, referring to the manual modulation effect diagram and the automatic modulation effect diagram shown in Figures 3(a) and 3(b), the effect of the viscosity modulation method of Lyocell fiber adhesive provided in this application will be explained by comparing specific examples of the viscosity modulation effect of Lyocell fiber adhesive.

[0081] In traditional artificial modulation methods, Figure 1 In the lyocell fiber adhesive preparation process shown, the adhesive solution is manually sampled from the discharge pump port to test its viscosity. Based on the viscosity test results, the operator manually adjusts the mass ratio coefficient of raw materials and solvent in the pulverizer. The laboratory samples the adhesive solution from the discharge pump port every 2 hours to test its viscosity. Based on the test results, the operator manually adjusts the mass ratio coefficient. The viscosity control trend is shown in Figure 3(a), with an average viscosity of 17092 Pa·s and a viscosity coefficient of variation (CV) of 1.9%.

[0082] According to the viscosity modulation method of Lyocell fiber adhesive provided in the embodiments of this application, with reference to the operating torque of the delivery pump, the DCS system automatically controls and adjusts the mixing ratio coefficient, and the laboratory takes samples of adhesive at the sampling port of the unloading pump every 2 hours to test the viscosity of the adhesive. The viscosity control trend is shown in Figure 3(b), with an average viscosity of 17117 Pa·S and a viscosity CV value of 0.5%.

[0083] Comparing the two examples above, it can be seen that the viscosity modulation method of lyocell fiber adhesive provided in this application can significantly reduce the fluctuation range of lyocell fiber adhesive viscosity compared with the traditional manual modulation method, so that the adhesive viscosity can be stabilized within the qualified range required by the process, effectively improving the consistency of adhesive quality, thereby ensuring the stability of subsequent spinning processes, reducing quality problems such as uneven fiber product strength and fineness deviation caused by viscosity fluctuations, and reducing the yield of unqualified products.

[0084] Secondly, traditional manual mixing methods employ a timed sampling and testing mode. Operators collect adhesive samples from the discharge pump sampling port every 2 hours and send them to the laboratory for viscosity and cellulose content testing using a rheometer. This testing process takes approximately 1.5 hours. Therefore, from the time the adhesive exhibits viscosity abnormalities to the operator obtaining test data and adjusting the ratio, the total lag time is approximately 3.5 hours. During this period, substandard adhesive continues to be produced, and the delayed adjustments cannot correct viscosity deviations in a timely manner, further exacerbating viscosity fluctuations. In contrast, this application uses a DCS system to collect the operating torque of the delivery pump in real time. Based on the positive correlation between operating torque and adhesive viscosity, it achieves online real-time monitoring of viscosity-related data. Without waiting for laboratory test results, the DCS system can automatically adjust the ratio coefficient of raw materials and solvents in the pulverizer in real time based on torque data fluctuations. This significantly reduces adjustment lag, enabling timely detection and rapid correction of viscosity abnormalities, effectively preventing the continuous production of substandard adhesive, and ensuring the stability of adhesive viscosity control.

[0085] Furthermore, traditional manual modulation methods rely on operators manually adjusting the proportioning coefficients, which is easily affected by human factors such as operator experience and skill level, resulting in large adjustment errors and poor consistency. This application, however, uses a DCS system to automatically control the adjustment, avoiding human error and further improving the accuracy and consistency of the proportioning adjustment. At the same time, it reduces the workload of manual sampling, testing, and adjustment, lowering labor costs, increasing production efficiency, and better meeting the needs of continuous industrial production.

[0086] This application also provides an electronic device in its embodiments. (See reference...) Figure 4 The diagram illustrates a structural schematic suitable for implementing the electronic device in the embodiments of this application. The electronic device in the embodiments of this application may include, but is not limited to, fixed terminals such as mobile phones, tablets, large-screen teaching displays, wearable devices, etc. Figure 4 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0087] like Figure 4 As shown, the electronic device may include a processing unit (e.g., a central processing unit, a graphics processing unit, etc.) 1, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 2 or a program loaded from a storage device 8 into a random access memory (RAM) 3, to implement the lyocell fiber adhesive viscosity modulation method of the foregoing embodiments of this application. When the electronic device is powered on, the RAM 3 also stores various programs and data required for the operation of the electronic device. The processing unit 1, ROM 2, and RAM 3 are interconnected via a bus 4. An input / output (I / O) interface 5 is also connected to the bus 4.

[0088] Typically, the following devices can be connected to I / O interface 5: input devices 6 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 7 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 8 including, for example, memory cards, hard drives, etc.; and communication devices 9. Communication device 9 allows electronic devices to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 4 Electronic devices with various devices are shown, but it should be understood that it is not required to implement or have all of the devices shown. More or fewer devices may be implemented or have alternatively.

[0089] This application also provides a computer program product including computer-readable instructions, which, when executed on an electronic device, cause the electronic device to implement any of the lyocell fiber adhesive viscosity modulation methods provided in this application.

[0090] This application also provides a computer-readable storage medium carrying one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any of the lyocell fiber adhesive viscosity modulation methods provided in this application.

[0091] It should also be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. In addition, in the device embodiment drawings provided in this application, the connection relationship between modules indicates that they have a communication connection, which can be implemented as one or more communication buses or signal lines.

[0092] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware, or it can be implemented by special-purpose hardware including application-specific integrated circuits, special-purpose CPUs, special-purpose memory, special-purpose components, etc. Generally, any function performed by a computer program can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be diverse, such as analog circuits, digital circuits, or special-purpose circuits. However, for this application, software program implementation is more often the preferred implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium, such as a computer floppy disk, USB flash drive, mobile hard disk, ROM, RAM, magnetic disk, or optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, training equipment, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0093] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product.

[0094] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, training device, or data center to another website, computer, training device, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).

[0095] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The various embodiments can be combined as needed, and the same or similar parts can be referred to each other.

Claims

1. A method for adjusting the viscosity of a lyocell fiber adhesive, characterized in that, include: The operating torque of the conveying pump when conveying the current batch of target material is obtained. The target material is obtained by mixing raw materials and solvents used to make lyocell fiber adhesive according to a preset mass ratio coefficient. The operating torque of the conveying pump is related to the flow characteristics of the conveyed material. If the operating torque exceeds the preset acceptable torque range, the mass ratio coefficient of the current batch is adjusted according to the deviation direction of the operating torque relative to the acceptable torque range to obtain the target mass ratio coefficient, so as to control the feeding ratio of the raw materials and the solvent in the next batch of operation.

2. The method for adjusting the viscosity of lyocell fiber adhesive according to claim 1, characterized in that, The process of adjusting the mass ratio coefficient of the current batch according to the deviation direction of the operating torque from the qualified torque range to obtain the target mass ratio coefficient includes: If the operating torque is greater than the right boundary value of the qualified torque range, the target mass ratio coefficient is obtained by increasing the mass ratio coefficient of the current batch according to the preset ratio coefficient adjustment range. If the operating torque is less than the left boundary value of the qualified torque range, the target quality ratio coefficient is obtained by adjusting the preset ratio coefficient by reducing the ratio coefficient of the current batch.

3. The method for adjusting the viscosity of lyocell fiber adhesive according to claim 1, characterized in that, The process of obtaining the operating torque of the conveying pump when conveying the current batch of target material includes: Obtain the torque sequence of the entire process of the conveying pump conveying the current batch of target material; The average torque within a preset time window is calculated based on the torque sequence, and the average torque is used as the operating torque for the current batch.

4. The method for adjusting the viscosity of lyocell fiber adhesive according to any one of claims 1-3, characterized in that, The process of obtaining the qualified torque range includes: When the viscosity of the lyocell fiber adhesive solution is within the acceptable viscosity, the operating torque of the delivery pump is taken as the torque center value. Based on the torque center value and the preset reasonable torque deviation value, the left and right boundary values ​​of the qualified torque range are determined.

5. The method for adjusting the viscosity of lyocell fiber adhesive according to claim 4, characterized in that, The method further includes: Laboratory viscosity data of Lyocell fiber adhesive is collected at a preset cycle. Based on the laboratory viscosity data, one or more of the following are calibrated and updated: qualified torque range, proportioning coefficient adjustment range, torque center value, and reasonable torque deviation value.

6. The method for adjusting the viscosity of lyocell fiber adhesive according to any one of claims 1-3, characterized in that, In cases where multiple consecutive batches of the operating torque exceed the acceptable torque range, the method further includes: Record the total number of batches whose operating torque continuously exceeds the qualified torque range; If the total number of batches exceeds the preset limit for compensation, the adjustment of the ratio coefficient will stop, and a safety warning message will be sent to the front end.

7. A viscosity modulation system for lyocell fiber adhesive, characterized in that, include: Control unit, crusher, and delivery pump; The control unit is configured to implement the viscosity modulation method of lyocell fiber adhesive as described in any one of claims 1-6, to obtain a target mass ratio coefficient, and to send the target mass ratio coefficient to the pulverizer; The pulverizer is used to receive the target mass ratio coefficient, control the feeding ratio of raw materials and solvent in the pulverizer according to the target mass ratio coefficient, and pulverize and mix the raw materials and solvent to obtain the target material; The delivery pump is used to transport the target material generated by the pulverizer to downstream components to produce lyocell fiber adhesive.

8. An electronic device, characterized in that, include: Memory and processor; The memory is used to store programs; The processor is used to execute the program to implement each step of the viscosity modulation method for Lyocell fiber adhesive as described in any one of claims 1 to 6.

9. A readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements each step of the viscosity modulation method for Lyocell fiber adhesive as described in any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements each step of the viscosity modulation method for Lyocell fiber adhesive as described in any one of claims 1 to 6.

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