System for continuously monitoring and extracting stickies in papermaking white water and application of extracting stickies

Abstract

The invention provides a continuous monitoring and extracting system for stickies in papermaking white water and application of the continuous monitoring and extracting system for the stickies. The system comprises a mounting frame body, a white water sampling system, a sample pretreatment system, a hot air separation system, a negative pressure extraction system and an integrated isolation structure. According to the system, a sampling port is formed in a white water conveying pipeline, continuous collection, separation and extraction of stickies in white water are achieved by adopting a sampling pulp board circulating rotation mechanism, and separation of wood fiber solute and the stickies is achieved by utilizing hot air drying and differential adsorption technologies based on the difference of the wood fiber solute and the stickies in physical properties. The system is provided with an intelligent control unit, and can continuously monitor the content change of the sticky substances for 24 hours. The application method comprises the four steps of continuous extraction, real-time analysis, dynamic feedback control and self-adaptive production optimization, and monitoring data is converted into a production control instruction to form a closed-loop control system. The adverse effect of the adhesive on a papermaking system is effectively reduced, and the problems of equipment blockage and paper flaws are reduced.

Description

Technical Field

[0001] The present invention relates to the field of papermaking industrial equipment, and particularly to an intelligent system for continuous monitoring, separation and extraction of adhesives in a papermaking white water circulation system and an application method thereof. Background Art

[0002] Currently, the monitoring of adhesives in papermaking white water mainly relies on traditional off-line analysis methods. Chinese Patent CN101424634B discloses a method for measuring the concentration of organic substances in papermaking white water based on ultraviolet-visible spectroscopy. This method selects specific wavelengths in the ultraviolet region (200nm - 400nm) and the near-infrared region (700nm - 1100nm), and uses dual-wavelength technology to eliminate the interference of components such as fibers and fillers on the measurement, so as to realize the quantitative analysis of dissolved and colloidal organic substances. Although this method has been improved compared with traditional extraction methods, it still has the following deficiencies: First, although this method can measure the total amount of dissolved and colloidal organic substances in papermaking white water, it cannot distinguish different types of organic substances. Especially for adhesives, which are the most serious substances affecting papermaking production, it lacks specific recognition and quantification capabilities. Due to their special physical and chemical properties (such as adhesiveness, depositability, etc.), adhesives can cause serious equipment blockage and paper surface defects even at relatively low concentrations. Therefore, a more precise monitoring method is needed.

[0003] Second, existing measurement methods are mostly static measurements and cannot achieve dynamic monitoring of the formation and accumulation process of adhesives. During the papermaking production process, the generation and accumulation of adhesives have obvious dynamic characteristics and are affected by various factors such as raw material composition, production process parameters, and environmental temperature. The lack of continuous monitoring means makes it difficult for production operators to detect the trend changes in the accumulation of adhesives in a timely manner and unable to take preventive measures to avoid production problems.

[0004] Third, most existing measurement methods require pretreatment of samples, such as centrifugal separation, filtration, etc. This not only increases the operation complexity but also prolongs the analysis time, making it difficult to meet the requirements of rapid monitoring of adhesives during the production process. In the actual production environment, sudden changes in the adhesive content may cause serious production failures in a short time. Therefore, a monitoring technology that can respond in real time is needed.

[0005] Finally, the existing technology lacks an effective way to integrate monitoring data with the production control system. Merely obtaining the adhesive content data without being able to convert it into production control instructions makes it difficult to exert the value of the monitoring technology in optimizing the production process. Summary of the Invention

[0006] The object of the present invention is to provide a continuous monitoring, separation and extraction system for adhesives in papermaking white water and its application method. This system can monitor and extract the adhesives in papermaking white water in real time and accurately, provide data support and decision-making basis for the papermaking production process, and effectively reduce the adverse effects of adhesives on the papermaking system.

[0007] According to one aspect of the present invention, there is provided a continuous monitoring, separation and extraction system for adhesives in papermaking white water, comprising: a mounting frame, a white water sampling system, a sample pretreatment system, a hot air separation system, a negative pressure extraction system and an integrated isolation structure.

[0008] Specifically, an integrated isolation frame is provided inside the mounting frame, and the two together form a closed sampling space; the mounting frame is arranged at a branch or sampling port of the white water conveying pipeline for seamless integration with the white water circulation system of the papermaking production line; the white water sampling system is used to extract white water samples from the white water conveying pipeline and transport them to the closed sampling space to achieve stable acquisition of samples; the sample pretreatment system includes a rotatable sampling component, and the sampling component is provided with a plurality of sampling pulp plates distributed along the circumferential direction for adsorbing white water samples from the closed sampling space; the hot air separation system includes a hot air drying part and a separation and adsorption part for drying the white water samples on the sampling pulp plates and separating the dissolved wood fiber substances; the negative pressure extraction system includes an extraction housing and an adsorption component for extracting and collecting the adhesives from the sampling pulp plates, and a removable extraction container is arranged inside the extraction housing; the integrated isolation structure forms a separation isolation station and an extraction isolation station at the positions of the hot air separation system and the negative pressure extraction system respectively for isolating the working areas of each station and preventing mutual interference.

[0009] Through the rotation of the sampling component, the sampling pulp plates sequentially pass through the white water samples, the hot air separation system and the negative pressure extraction system in the closed sampling space. Based on the differences in physical properties between the dissolved wood fiber substances and the adhesives, especially the significant differences in water absorption and viscosity, continuous monitoring and efficient extraction of the adhesives in the white water are realized. This system does not require additional dissolution treatment of the recycled paper materials, directly extracts samples from the white water pipeline or the outlet of the sedimentation tank, greatly improving the monitoring efficiency and data continuity.

[0010] As a preferred embodiment of the present invention, the sampling pulp plates are made of a porous composite material, including a stainless steel substrate and a special polymer coating. This design combines the mechanical strength of the stainless steel substrate and the selective adsorption ability of the special polymer coating, and is specially designed for the capture of adhesives in white water, with characteristics such as corrosion resistance, wear resistance and easy cleaning, greatly improving the capture ability of adhesives and the service life of the system.

[0011] As a preferred embodiment of the present invention, the hot air drying section adopts a segmented temperature gradient control design. The temperature of the inlet section is 45 ± 2 °C, the temperature of the middle section is 55 ± 2 °C, and the temperature of the outlet section is 65 ± 2 °C. Each temperature zone is equipped with an independent control system. This precise temperature control ensures that adhesives with different characteristics can be properly treated without changing their chemical structures, improving the separation effect and the accuracy of monitoring data.

[0012] As a preferred embodiment of the present invention, the adsorption force of the first adsorption element of the separation and adsorption section is greater than the adsorption force of the sampling pulp board on the white water sample film. The adsorption assembly includes a second adsorption element, and the adsorption force of the second adsorption element is greater than that of the first adsorption element. This adsorption force gradient design ensures that different components can be gradually separated in the process flow: First, the wood fibers are suction-separated under the action of the first adsorption element due to the reduced weight after drying; then the sampling pulp board rotates to the negative pressure extraction system. At this time, the remaining adhesives are completely suction-collected under the stronger adsorption force of the second adsorption element, achieving efficient separation of adhesives and wood fibers.

[0013] As a preferred embodiment of the present invention, the integrated isolation structure includes a rubber isolation plate, and the rubber isolation plate is provided with a long slit adapted to the size of the sampling pulp board on the rotation path of the sampling pulp board. The special silicone rubber material not only has excellent sealing performance and appropriate elasticity, can automatically give way when the sampling pulp board passes and then reset and seal, but also can maintain stable performance in the white water environment for a long time, and will not age and deform due to long-term contact with chemical substances, effectively solving the possible mutual interference problem during the simultaneous operation of multiple workstations.

[0014] As a preferred embodiment of the present invention, the system further includes: a drain channel, arranged at the bottom of the sampling space, for discharging the waste water after cleaning to prevent the accumulation of sewage and cross-contamination; a control input device, arranged on the outer wall of the mounting frame, enabling operators to conveniently set and adjust various process parameters; an adhesive weighing device, arranged in the extraction and holding box, for real-time measurement of the weight of the adhesive to provide accurate monitoring data. These designs improve the automation level and operation convenience of the system, while ensuring the accuracy of monitoring data.

[0015] As a preferred embodiment of the present invention, the white water sampling system includes a white water input channel, a clean water input channel, an output channel, and a sample stabilization chamber; a temperature control device and a pH adjustment system are configured in the sample stabilization chamber, which can adjust the white water sample to the optimal detection state without changing the characteristics of the adhesive; the white water sampling system is also equipped with a self-cleaning device, which automatically flushes the pipeline and the chamber after sampling to prevent cross-contamination caused by sample residue. This design ensures the representativeness of sampling and the accuracy of measurement results, while improving the long-term operation stability of the system.

[0016] According to another aspect of the present invention, there is provided an application method for the adhesives extracted based on the above system, including a continuous extraction step, a real-time analysis step, a dynamic feedback control step, and an adaptive production optimization step.

[0017] Specifically, in the continuous extraction step, the above system is used to continuously monitor and extract the adhesives in the papermaking white water for 24 hours. Through the cyclic rotation of the sampled pulp board, continuous collection, separation, and extraction of samples are realized, and the extracted adhesives are collected in real time in the extraction container; in the real-time analysis step, an adhesives weighing device is used to perform real-time quantitative measurement on the continuously extracted adhesives, record the dynamic change curve of the adhesives content over time, and establish a time-series adhesives content database; in the dynamic feedback control step, the time-series data of the continuously monitored adhesives content is compared with the dynamically preset threshold in real time to identify the change trend and fluctuation law of the adhesives content. When the adhesives content exceeds the preset threshold or shows abnormal fluctuations, a precise adjustment signal is sent to the papermaking production line control system in a timely manner; in the adaptive production optimization step, based on the law of adhesives generation revealed by the continuously monitored data, dynamic adaptive adjustment of the papermaking process parameters is realized, including real-time optimization of the additive dosage, continuous adjustment of the screening parameters, and the operating state of the white water circulation system, forming a closed-loop control system, continuously reducing the adverse effects of adhesives on the papermaking system, and improving production stability and paper quality consistency.

[0018] As a preferred embodiment of the present invention, the real-time analysis step further includes: continuously monitoring the physical properties of the adhesives, and real-time recording of the viscosity change curve, the dynamic change of the particle size distribution, and the moisture content fluctuation; regularly analyzing the chemical composition of the continuously extracted adhesives samples, tracking the time-series changes of the resinous substance content, the additive residue content, and the microbial metabolite content; establishing a dynamic correlation model between the adhesives characteristics and the papermaking process parameters, analyzing the change law of the adhesives characteristics under different time periods and different working conditions, and forming a time-sequential correlation database to provide data support for the real-time control of the production process. This comprehensive analysis method enables the system to deeply understand the formation mechanism and change law of the adhesives, providing a more scientific basis for the optimization of the production process.

[0019] As a preferred embodiment of the present invention, the dynamic feedback control step includes: establishing an intelligent early warning mechanism based on continuous monitoring data, setting three dynamic thresholds for the adhesive content, namely normal, early warning, and alarm thresholds, which are automatically adjusted according to historical data and current production conditions; when the continuous monitoring data shows that the adhesive content reaches the early warning threshold or an abnormal growth trend is detected, the system automatically issues an early warning signal and adjusts the process parameters in real time to prevent the accumulation of adhesives; when the continuous monitoring data shows that the adhesive content reaches the alarm threshold or a sudden increase occurs, the system immediately notifies the operator and initiates an emergency response process, including increasing the amount of cleaning agent, temporarily reducing the white water recycling rate, or performing an emergency cleaning of the equipment, while continuously monitoring the treatment effect to form a closed-loop emergency response mechanism. This hierarchical response mechanism can effectively respond to abnormal changes in the adhesive content in a timely manner, reduce production risks, ensure paper quality, and extend the service life of the equipment.

[0020] In summary, the continuous monitoring, separation, and extraction system for adhesives in papermaking white water and its application method provided by the present invention can realize intelligent control and optimized adjustment of the production process by real-time monitoring and analyzing the adhesive content in white water, effectively solving problems such as equipment blockage and paper defects caused by the accumulation of adhesives in traditional papermaking production, and improving production efficiency and paper quality. In particular, the system can continuously monitor the adhesive content in white water for 24 hours, providing comprehensive data support for papermaking production, and having important practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the present invention after removing the installation frame; Figure 3 is a schematic structural diagram of the present invention within the sampling space; Figure 4 is a schematic structural diagram of the hot air separation system of the present invention; Figure 5 is a schematic structural diagram of the negative pressure extraction system of the present invention; Figure 6 is a schematic structural diagram of the negative pressure extraction system of the present invention after separating and partially cutting off the extraction container; Figure 7 is a flowchart of the application method of the continuous monitoring, separation, and extraction system for adhesives in papermaking white water; Figure 8 shows the complete data acquisition process from white water sampling to establishing an adhesive property file; Figure 9 is a logical flowchart for the cost-benefit analysis of adhesive monitoring.

[0022] Reference numerals: mounting frame 10, integrated isolation frame 11, white water sampling system 20, sample pretreatment system 30, hot air separation system 40, negative pressure extraction system 50, integrated isolation structure 60, white water input channel 21, fresh water input channel 22, output channel 23, sample stabilization chamber 24, sampling assembly 31, hot air drying section 41, separation and adsorption section 42, extraction housing 51, second adsorption pipeline 52, second adsorption element 53, extraction container 54, rubber isolation plate 62, sampling pulp board 311, fan unit 411, electric heating wire 412, grid plate 413, first adsorption pipeline 421, containing chamber 511, sampling space 12, separation and isolation station 621, extraction and isolation station 622, long strip gap 623, drain hole channel 70, control input device 80, adhesive weighing component 90. Detailed implementation manners

[0023] Example 1: This example provides an intelligent separation and extraction system for continuously monitoring the adhesives in papermaking white water and the application of the extracted adhesives, mainly for real-time monitoring and efficient extraction of those adhesives that cannot be normally dissolved in the white water circulation system. By setting dedicated branch sampling ports or extraction ports on the white water conveying pipeline or the white water circulation tank, the system can continuously sample and analyze the flowing white water. The working principle of the system is based on the significant differences in water absorption and viscosity between wood fiber dissolutes and adhesives. Through hot air drying and differential adsorption technologies, precise separation and continuous monitoring of the two are achieved. During the working process, the system directly extracts samples from the white water pipeline or the outlet of the sedimentation tank without the need for additional dissolution treatment of the recycled paper materials. The intelligent control system judges the change trend of the adhesive content according to the real-time monitoring data. This intelligent monitoring system is seamlessly integrated into the white water circulation system of the papermaking production line, can monitor the adhesive content in real time and accurately, and apply the monitoring data to the optimization of production parameters. It can intelligently guide the production process according to the amount of adhesives in different stages, effectively reduce the adverse effects of adhesives on the papermaking system, reduce equipment blockage and paper defects, and improve the resource utilization efficiency at the same time.

[0024] Reference Figures 1 to 3As shown in the figure, the continuous monitoring system for sizing materials in papermaking white water of the present invention adopts a modular integrated design. The main body is a mounting frame 10, and an integrated isolation frame 11 is provided inside it. The two together constitute an enclosed sampling space 12 with an optimized structure. The upper part of this space is designed in a rectangular shape, and the lower part is designed in a semi-circular shape, which is conducive to the circulation of white water and efficient sampling. The mounting frame 10 is installed at the branch or sampling port of the white water conveying pipeline through a connecting flange. By setting an electric control valve and a flow control device at the branch or sampling port, it is ensured that the system can automatically adjust the sampling volume according to the monitoring requirements, and at the same time ensure the fit and leak-free connection with the existing pipeline system. Inside this enclosed space, four subsystems with coordinated functions are integrated: a white water sampling system 20, a sample pretreatment system 30, a hot air separation system 40, and a negative pressure extraction system 50. This modular design enables the system to adapt to different installation environments and process requirements, and is also convenient for maintenance and upgrade. The system is also equipped with a data acquisition and analysis module, which can transmit the monitoring results to the central control system of the papermaking production line in real time, providing data support for the optimization of the production process.

[0025] When the system works, first, the white water sampling system 20 introduces the sample in the white water pipeline into the semi-circular lower space of the sampling space 12. The white water sampling system 20 adopts a programmable control strategy, which can automatically adjust the sampling frequency and sampling volume according to the production process stage to ensure the continuity and representativeness of the monitoring. Subsequently, the sample pretreatment system 30 inside the sampling space 12 starts according to a preset program. By controlling the rotation mode, the sampling pulp board is swept across the white water sample, and through the adsorption effect of the sampling pulp board, efficient sampling of the sizing materials in the white water is achieved. After sampling, the system continues to drive the sample pretreatment system 30 to rotate at a fixed angle, so that it passes through two working positions in sequence: the separation isolation position 621 of the hot air separation system 40 and the extraction isolation position 622 of the negative pressure extraction system 50. These two key treatment systems are both arranged in the upper part of the sampling space, and are connected to the sampling space 12 through an isolation structure composed of special rubber isolation plates, ensuring the accuracy and stability of the treatment process, and effectively avoiding mutual interference between different working positions. Through this continuous sampling - analysis - extraction working mode, the system realizes the real-time monitoring of the sizing material content in the white water. The monitoring data can be used to analyze the dynamic change law of the generation of sizing materials, providing a scientific basis for the control of sizing materials in the production process.

[0026] Reference Figure 2 and Figure 3As shown, the white water sampling system 20 is responsible for extracting representative samples from the white water pipeline and performing preliminary processing. It includes a white water input channel 21 (specifically for introducing white water samples from the main pipeline), a clean water input channel 22 (equipped with a flow regulating valve to ensure stable and controllable sampling volume), an output channel 23 (ensuring the directional output of the processed samples), and a sample stabilization chamber 24 (serving as the area for sample temporary storage and preliminary processing). Inside the sample stabilization chamber 24, a temperature control device and a micro pH adjustment system (not shown in the figure) are configured to adjust the white water samples to the optimal detection state without changing the characteristics of the adhesives. The system is also equipped with a self-cleaning device that automatically flushes the pipeline and the chamber after each sampling to prevent sample residue from causing cross-contamination and ensure the accuracy of the monitoring results. The connection between the white water sampling system 20 and the main pipeline adopts a quick-connector design, which facilitates system maintenance or replacement of key components without shutting down the machine, improving the reliability and service life of the entire monitoring system. In addition, the system is also configured with an intelligent flow sensor that can monitor the sampling flow rate in real time to ensure stable sampling conditions even under fluctuating white water flow rates.

[0027] Reference Figure 3 As shown, the sample pretreatment system 30 realizes the efficient capture and pretreatment of adhesives in white water samples through a rotating sampling mechanism. The system is an intelligent fan-shaped sampling assembly 31, and a precision rotating stepping motor (not shown in the figure) is connected coaxially in the middle. The stepping motor is controlled by a microcomputer and can achieve angle positioning and speed adjustment to ensure sampling accuracy and repeatability. To avoid the interference and wear of suspended particles in the white water on the moving parts, the output shaft of the rotating motor is arranged above the liquid level of the white water sample, and at the same time, a dustproof and waterproof design is adopted to improve the stability and durability of the system in a humid environment. The system is connected to the central controller through a data interface and can automatically adjust the sampling strategy and rotation parameters according to the real-time changes in the white water state.

[0028] The key component of the sampling assembly 31 is a plurality of sampling paddle plates 311 evenly distributed along the circumferential direction. Each sampling paddle plate is made of a new type of porous composite material. This composite material combines the mechanical strength of a stainless steel substrate and the selective adsorption ability of a special polymer coating, and is designed specifically for the capture of adhesives in white water, with characteristics such as corrosion resistance, wear resistance, and easy cleaning. Further, the surface of the sampling paddle plate 311 can also be designed with micro-nano-scale structures to further improve the capture ability of trace adhesives. In addition, the gap between the sampling paddle plate 311 and the inner wall of the sampling space 12 is controlled within the minimum range, and a non-pressure contact design is adopted, so that one side of the sampling paddle plate 311 is kept in a slight contact state with the arc-shaped inner wall of the sampling space 12. This design enables the sampling paddle plate 311 to gently scrape the inner wall surface during rotation, maximizing the capture and adsorption of adhesives in the pulp solution and improving the comprehensiveness and accuracy of sampling.

[0029] Reference Figure 3 As shown, the hot air separation system 40 and the negative pressure extraction system 50 are arranged in sequence along the technological process on the rotation path of the sampling pulp board 311. The system adopts an intermittent fixed-angle rotation control mechanism to ensure that after each rotation of the sampling pulp board 311, the working areas of the hot air separation system 40 and the negative pressure extraction system 50 each correspond to only one sampling pulp board 311. This precise positioning control ensures that each working station can focus on processing a single white water sample, avoiding cross-interference and improving the accuracy of separation and extraction. At the same time, this design also realizes the continuity of the technological process, enabling different sampling pulp boards 311 to be in different processing stages simultaneously, greatly improving the overall working efficiency of the equipment. The system is also equipped with high-precision angle sensors and position detection devices to ensure precise position control during long-term operation. Even in the case of fluctuations in white water flow or slight vibrations of the equipment, stable station alignment can be maintained, ensuring the consistency and reliability of the monitoring data. This continuous monitoring mode enables the system to reflect the change trend of the stickies content in white water in real time, providing a timely basis for parameter adjustment during the production process..

[0030] Reference Figure 3 and Figure 4 As shown, the hot air separation system 40 utilizes the differences in physical properties between the dissolved substances of wood fibers and the stickies in white water, especially the significant differences in water absorption and viscosity between the two, to achieve efficient separation. In the application scenario of continuously monitoring white water stickies, the separation accuracy of this system directly affects the accuracy of the monitoring results.

[0031] Furthermore, the hot air separation system 40 also provides an intelligent hot air control solution, including a multi-point temperature sensor array, a microprocessing control unit, and a precise regulation actuator. The specific implementation method is as follows: Install 5 - 7 evenly distributed PT100 type high-precision temperature sensors inside the hot air separation system 40 to collect multi-point temperature data in the separation space in real time; at the same time, set a dual-mode sensor at the white water sampling inlet to collect the temperature and turbidity information of the white water. These data are transmitted to the microprocessing control unit through the data bus. This unit is equipped with a dedicated PID algorithm chip to complete data analysis and decision-making. At the execution level, the system uses a wind volume adjustment baffle controlled by a stepping motor and a heating power control with PWM modulation to achieve temperature control with an accuracy of 0.1°C and wind speed adjustment with an accuracy of 1%. For example, when it is detected that the turbidity of the white water increases, the system will automatically increase the hot air temperature by 0.5 - 1.5°C and decrease the wind speed by 5 - 10% to ensure that a thicker stickies layer can be fully dried; when the temperature of the white water rises, the system will correspondingly reduce the initial hot air temperature to avoid the total heat exceeding the heat resistance threshold of the stickies.

[0032] In addition, further, to prevent overheating that may occur in case of accidents, the system also designs a dual safety protection mechanism: the primary protection uses a physical circuit breaker fuse, which automatically cuts off the power supply when the temperature exceeds 85°C; the secondary protection uses software monitoring. When the temperature rising rate exceeds 3°C / second or the temperature difference between any two points exceeds 10°C, the system will immediately reduce the heating power and issue an alarm. This multi-level precise control and safety protection mechanism ensure that the physical and chemical properties of the adhesives are not damaged during the separation process, guaranteeing the accuracy and comparability of the monitoring data.

[0033] Reference Figure 3 and Figure 4 As shown in the figure, the hot air separation system 40 includes two units with coordinated functions: the hot air drying section 41 and the separation and adsorption section 42. In the application scenario of continuous monitoring of white water adhesives, the design and performance of these two units are crucial for the accuracy of the monitoring results. The hot air drying section 41 is responsible for precisely heat-treating the white water sample film on the sampled pulp board 311, and realizes material separation by using the differences in water absorption and viscosity between the wood fiber dissolves and the adhesives, that is, the wood fibers lose water rapidly and become lighter due to good water absorption, while the adhesives maintain their original properties due to poor water absorption. Subsequently, the separation and adsorption section 42 sucks away the dried wood fibers through precisely controlled negative pressure, leaving an enriched adhesive layer for subsequent analysis.

[0034] Considering the diverse types of adhesives in papermaking white water (including various additive residues, resin substances, and microbial metabolites), the present invention can further adopt a segmented temperature gradient control design for the hot air drying section 41. For example: the inlet section maintains 45±2°C, the middle section 55±2°C, and the outlet section 65±2°C. Each temperature zone is equipped with an independent control system to ensure that adhesives with different characteristics can be properly treated without changing their chemical structures.

[0035] The structural design of the hot air drying section 41 includes three core components: the fan unit 411 (providing air flow power), the heating wire 412 (heating the air flow), and the grid plate 413 (optimizing the hot air distribution). When the system works, the heating wire 412 heats the air flow generated by the fan unit 411 to an appropriate temperature, and the hot air is evenly distributed onto the white water sample film on the sampled pulp board 311 through the grid plate 413 for precise temperature-controlled drying. In the white water continuous monitoring system, the fan unit 411 uses an EC DC brushless motor, combined with the impeller design, to ensure the air flow stability. The grid plate 413 adopts a honeycomb structure with diversion channels inside, ensuring that the hot air evenly covers the entire surface of the sampled pulp board 311, eliminating the hot spot phenomenon and making the drying process more uniform and controllable.

[0036] The separation and adsorption part 42 consists of a first adsorption element and a first adsorption pipeline 421 (the first adsorption element is not shown in the figure). The first adsorption pipeline 421 is arranged above the hot air drying part 41 and can accurately adsorb the air-dried wood fibers to complete the separation process. Further, the first adsorption element adopts an adjustable air gap design and can automatically adjust the distance from the sampled pulp sheet 311 according to different working conditions, ensuring both adsorption efficiency and avoiding disturbing the adhesive layer. The inner wall of the first adsorption pipeline 421 is treated with a material having a low friction coefficient to reduce the resistance and deposition of wood fibers during transmission and improve the long-term operation stability of the system.

[0037] Reference Figure 3 、 Figure 5 and Figure 6 As shown, the negative pressure extraction system 50 is a key unit for completing the final collection of adhesives and undertakes the important functions of quantitative extraction and analysis of adhesives in the white water continuous monitoring system. This system is specifically used to extract the adhesives still adhering to the sampled pulp sheet 311, including an extraction housing 51 (forming a containing cavity 511 inside), a second adsorption pipeline 52, and a second adsorption element 53. An extractable containing box 54 that can be inserted and removed is designed in the containing cavity 511. Its bottom end is completely communicated with the containing cavity 511 and is simultaneously connected to the second adsorption pipeline 52 and the second adsorption element 53 through pipelines to form a complete negative pressure extraction loop.

[0038] Precise calculation and control are carried out in the design of the adsorption force of this system, which is crucial for the accurate monitoring of white water adhesives: the adsorption forces of the first adsorption element and the second adsorption element 53 are both greater than the adsorption force of the sampled pulp sheet 311 on the white water sample film to ensure that substances can be effectively adsorbed and separated; at the same time, the adsorption force of the second adsorption element 53 is greater than that of the first adsorption element to form an adsorption force gradient. For example, the adsorption force of the sampled pulp sheet 311 on the sample is controlled within the range of 0.5 - 1.0 kPa, the adsorption force of the first adsorption element is set to 1.2 - 1.8 kPa, and the adsorption force of the second adsorption element 53 reaches 2.0 - 3.0 kPa. This precise gradient design ensures that different components can be gradually separated in the technological process.

[0039] In the actual technological process, the sampled pulp sheet 311 carrying the white water sample first passes through the hot air separation system 40. At this time, the wood fibers are sucked and separated under the action of the first adsorption element due to the reduced weight after drying; then the sampled pulp sheet 311 rotates to the negative pressure extraction system 50. At this time, the remaining adhesives are completely sucked and collected under the stronger adsorption force of the second adsorption element 53. This sequential treatment ensures the complete separation of adhesives and wood fibers.

[0040] Furthermore, in the white water continuous monitoring system, both the first adsorption element and the second adsorption element 53 are equipped with independent negative pressure sensors and microprocessor control units, which can adjust the adsorption force in real time to adapt to the changing characteristics of the adhesives under different white water conditions.

[0041] The extraction and storage box 54 is designed to be completely withdrawn from the mounting frame 10, enabling the operator to conveniently take out the collected adhesives for subsequent analysis or processing.

[0042] Reference Figure 2 and Figure 3 As shown in the figure, the present invention designs an integrated isolation structure 60 in the sampling space 12 to solve the possible interference problems that may occur when multiple workstations work simultaneously during the white water continuous monitoring process. This structure has dual technical functions: firstly, it effectively isolates the working areas between the hot air separation system 40 and the negative pressure extraction system 50, preventing the adsorption forces of the two systems from interfering with each other; secondly, it blocks the influence of the hot air generated by the hot air separation system 40 and the negative pressure generated by the negative pressure extraction system 50 on other sampling pulp boards 311 on the rotation path, ensuring the integrity of the samples at different processing stages.

[0043] The integrated isolation structure 60 is composed of special silicone rubber isolation plates 62 that are resistant to high temperature and chemical corrosion in this embodiment. These isolation plates form a separation and isolation station 621 and an extraction and isolation station 622 at the positions of the hot air separation system 40 and the negative pressure extraction system 50 respectively. The advantage of this design is that the special silicone rubber material not only has excellent sealing performance and appropriate elasticity, can automatically make way when the sampling pulp board 311 passes through and then reset and seal, but also can maintain stable performance in the white water environment for a long time without aging and deformation due to long-term contact with chemical substances. In addition, for the white water monitoring requirements under different working conditions, the integrated isolation structure 60 can also adopt various different forms, such as: it can be designed as a rigid partition with an opening and closing door, which automatically opens before the sampling pulp board 311 rotates to the station and automatically closes after it rotates out, suitable for high pressure difference environments; or adopt air curtain isolation, forming an air flow partition wall without a physical barrier through compressed air, which is particularly suitable for high-frequency sampling scenarios; it can also be designed as a telescopic movable partition, automatically adjusting the size of the isolation area according to the position of the sampling pulp board 311 to improve energy efficiency; or adopt a rotary partition, which rotates synchronously with the sampling component 31 to always maintain the isolation of a specific station, suitable for high-speed continuous monitoring scenarios.

[0044] Further details on the connection method of the integrated isolation structure 60 in the white water monitoring system: The grid plate 413 of the hot air separation system 40 is directly installed on the integrated isolation rack 11 and kept in communication with the separation isolation station 621 to ensure that hot air can enter the station interior directionally; The first adsorption pipeline 421 passes through the upper rubber isolation plate 62 and forms an airtight connection with the separation isolation station 621 to achieve precise adsorption of dried wood fibers; Similarly, the second adsorption pipeline 52 also passes through the integrated isolation rack 11 and communicates with the extraction isolation station 622 to form an adhesive extraction channel.

[0045] To solve the contradiction between the isolation structure and the sample rotation, further, on the rotation path that the sampling pulp board 311 must pass through, a long strip gap 623 adapted to the size of the sampling pulp board 311 is opened in the corresponding rubber isolation plate 62. This design enables the sampling pulp board 311 to easily push open the rubber isolation plate 62 at the gap by virtue of its kinetic energy during rotation, smoothly pass through the isolation structure, and complete the transfer process between the entire workstations, while the isolation plate can automatically reset after the sampling pulp board 311 passes through to restore the isolation effect.

[0046] Reference Figure 3 As shown, the present invention also considers the self-cleaning function of the device in its design, which is crucial for ensuring the stability of long-term operation and the accuracy of measurement results. This function is achieved through the multi-purpose design of the white water sampling system 20, eliminating the need for additional cleaning devices and improving the structural integration and economy.

[0047] The specific implementation method is: After the extraction of adhesives for one cycle is completed, clean water flow is introduced through the clean water input channel 22 to form an efficient flushing effect, and residues on the sampling component 31 and pulp residues adhering to the inner wall of the sampling space 12 are comprehensively cleaned. To achieve a closed-loop cleaning process, a dedicated drainage channel 70 is designed at the bottom of the sampling space 12 to ensure that the wastewater after cleaning can be smoothly discharged from the system, preventing sewage accumulation and cross-contamination.

[0048] To achieve the intelligent operation and precise control of the device, the present invention configures a control input device 80 for the human-machine interaction interface on the outer wall of the mounting frame 10 (as Figure 1 shown), enabling operators to conveniently set and adjust various process parameters, such as: key parameters such as the preset pulp dilution concentration, the rotation speed and interval time of the sampling component, the hot air temperature and speed, and the negative pressure intensity of each adsorption element.

[0049] The control input unit 80 is built with a high-performance processing chip and intelligent control algorithms. It can automatically calculate the optimal process conditions based on the input parameters and monitor the operating status of each system in real time. When abnormal conditions are detected, the system will automatically alarm and give treatment suggestions to ensure the safe and stable operation of the device. In addition, the control system also has data recording and analysis functions, which can generate trend charts of the stickies content, providing data support and decision-making basis for papermaking production.

[0050] The specific working process is as follows: 1. Intelligent continuous monitoring process of white water stickies Sampling and preparation stage The system introduces white water samples into the white water sampling system 20 through the sampling ports installed on the white water pipeline. The white water sampling system 20 controls the electric valves to precisely adjust the sampling flow rate according to the monitoring parameters preset by the control input unit 80 to ensure the representativeness of sampling. The sampled white water enters the system through the white water input channel 21. At the same time, necessary dilution adjustment can be carried out through the clean water input channel 22, and it stays briefly in the sample stabilization chamber 24 to achieve temperature and flow rate stability. Subsequently, the processed white water sample flows into the lower semi-circular area of the sampling space 12 through the output channel 23, forming a stable liquid level, preparing for high-precision monitoring.

[0051] Sampling stage The system starts the sample pretreatment system 30 and controls the rotation motor to perform intermittent fixed-angle rotation according to the preset program. During this process, the sampling paddle 311 made of special composite material slowly passes through the white water liquid level, and a sample film rich in stickies is formed on its surface through its selective adsorption characteristics. The rotation continues until the sampling paddle 311 carrying the sample film reaches the separation and isolation station 621, completing the sampling process. The system can automatically adjust the sampling frequency according to the change trend of the stickies content, increasing the sampling frequency when the stickies content fluctuates greatly to achieve dynamic monitoring.

[0052] Separation stage After the sampling paddle 311 reaches the separation and isolation station 621, the hot air separation system 40 is automatically started. The fan unit 411 generates precisely controlled airflows, which are heated by the heating wire 412 and evenly blown onto the white water sample film on the sampling paddle 311 through the grid plate 413. Due to the difference in water absorption between wood fiber dissolutions and stickies, the wood fiber dissolutions are dried first and become lighter. At this time, the first adsorption element is activated, and the dried wood fibers are adsorbed and collected through the first adsorption pipeline 421, while the stickies continue to adhere to the sampling paddle 311 due to maintaining moisture and viscosity, achieving a preliminary separation of the two substances. The system automatically adjusts the hot air temperature and wind speed by real-time monitoring of the separation effect to ensure the best separation effect under different white water characteristic conditions.

[0053] Extraction and monitoring stage After the separation is completed, the rotating motor rotates precisely again, moving the sampling pulp board 311 carrying the adhesive to the extraction isolation station 622, and at the same time transferring the other sampling pulp boards 311 to the corresponding stations respectively, so as to realize the continuous progress of the monitoring process. At this time, the negative pressure extraction system 50 is started, and the second adsorption element 53 completely sucks the adhesive from the sampling pulp board 311 through the precisely controlled negative pressure via the second adsorption pipeline 52. The adhesive passes through the second adsorption pipeline 52 and the wall of the extraction housing 51 in sequence and enters the storage cavity 511 inside the extraction storage box 54. At the same time, a high-precision adhesive weighing element 90 is provided at the bottom of the storage cavity 511 to measure the weight of the adhesive in real time and transmit the data to the control system, completing a quantitative monitoring of the adhesive. The system automatically generates a trend chart of the change in the adhesive content based on the continuously measured data, reflecting the dynamic changes of the white water adhesive in the papermaking production process in real time.

[0054] Data application stage The system transmits the monitored adhesive content data to the central control system of the papermaking production line through the industrial communication interface for guiding the optimization of the production process. When it is monitored that the adhesive content exceeds the preset threshold, the system will send out a warning signal to prompt the operator to make corresponding adjustments, such as changing the additive dosage, adjusting the screening parameters or optimizing the white water circulation system. The system can also automatically recommend the best treatment plan according to different intervals of the adhesive content, such as maintaining the existing parameters at low content, appropriately adjusting the additive dosage at medium content, and taking strengthening cleaning measures at high content, etc., to realize the intelligent management of the production process.

[0055] Circular monitoring stage After the processing of one sampling pulp board 311 is completed, the system continues to control the rotating motor to rotate intermittently at a fixed angle according to the program, so that different sampling pulp boards 311 pass through each station in sequence, realizing the parallel processing of multiple samples and the continuous circular monitoring of the adhesive. This parallel processing mechanism greatly improves the monitoring efficiency and data continuity, and can realize the 24-hour uninterrupted monitoring of the adhesive content, providing comprehensive data support for papermaking production.

[0056] 2. Intelligent self-cleaning function After the monitoring system runs for a certain period of time, the system automatically switches to the cleaning mode to ensure the accuracy of long-term monitoring. Clean water flows in through the clean water input channel 22, and the control rotating motor drives the sampling pulp board 311 to pass through the cleaning area in sequence. The system adopts a triple cleaning strategy: first, high-pressure water flow flushing, the clean water is sprayed from a specific angle to generate a strong impact force to efficiently remove the stubborn adhesive residue on the surface of the sampling pulp board 311; second, chemical-assisted cleaning, the system automatically mixes the most suitable cleaning liquid according to the characteristics of the monitored adhesive to dissolve the poorly soluble adhesive; finally, ultrasonic cleaning is carried out to deeply clean the trace residues that are difficult to remove.

[0057] As the cleaning process progresses, the liquid below the sampling space 12 automatically renews based on the level of contamination detected by the sensor, ensuring effective cleaning. Simultaneously, the motor drives the sampling paddle 311 to rotate at a specific rhythm, enabling it to self-clean and clean the inner walls of the sampling space 12 during rotation. The system also monitors cleaning effectiveness using a photoelectric sensor, automatically extending the cleaning time or increasing the cleaning dosage if necessary, ensuring long-term, stable operation of the monitoring device.

[0058] After the cleaning work is completed, the system discharges the clean wastewater containing impurities out of the device through the drainage channel 70 set at the bottom of the sampling space 12, and automatically performs short-term airflow drying to quickly restore the equipment to the optimal monitoring state and continue the continuous monitoring of white water adhesives.

[0059] Example 2: Intelligent application of a continuous monitoring, separation and extraction system for stickies in papermaking white water This embodiment provides a continuous application method based on a continuous monitoring, separation and extraction system for papermaking white water stickies. This method realizes intelligent control and optimization adjustment of the production process by real-time monitoring and analysis of the stickies content in the white water, effectively solving problems such as equipment blockage and paper surface defects caused by stickies accumulation in traditional papermaking production, and improving production efficiency and paper quality.

[0060] refer to Figures 7 - 9 As shown, the application method of the present invention includes four main steps: continuous extraction, real-time analysis, dynamic feedback control, and adaptive production optimization. This method utilizes the papermaking whitewater stickies continuous monitoring, separation, and extraction system described in Example 1 to obtain continuous monitoring data on stickies in whitewater and apply this data to production process optimization. The specific implementation methods of each step are described in detail below.

[0061] In this embodiment, the continuous extraction step utilizes the papermaking whitewater adhesives continuous monitoring, separation, and extraction system described in Example 1. Through the cyclic rotation of the sampling pulp plate 311, 24-hour uninterrupted monitoring and extraction of adhesives in the whitewater are achieved. This system is installed on the main whitewater circulation pipeline, with the sampling point located at the pulper outlet. The whitewater adhesives content at this location is highly representative and can reflect the adhesives status of the entire whitewater circulation system.

[0062] The system achieves continuous sample collection, separation, and extraction by controlling the rotation frequency of the sampling pulp plate 311. For example, for a production line using recycled waste paper as raw material, the sampling pulp plate 311's rotation frequency is set to complete a full cycle every 5 minutes, ensuring the temporal resolution and continuity of the monitoring data. For production lines using virgin fiber as raw material, the rotation frequency can be reduced to once every 10 minutes to save energy and extend the life of the equipment.

[0063] The extracted adhesives are collected in real time in the extraction storage box 54 through the negative pressure extraction system 50. To ensure the accuracy and continuity of data, the system adopts an alternating working mode of two extraction storage boxes. When one extraction storage box reaches the preset collection time (usually 4 hours), the system automatically switches to the other storage box to continue collection. At the same time, the full storage box is weighed and analyzed, and after completion, it is emptied to prepare for the next collection cycle. This design ensures the continuity of the adhesive extraction process and prevents monitoring interruption due to the replacement of the storage box.

[0064] The collected adhesives are quantitatively measured in real time by a high-precision adhesive weighing component 90 (with an accuracy of 0.01 g) set at the bottom of the extraction storage box 54. The system uses timestamp technology, and each weighing data is precisely associated with the sampling time to form time series data of the adhesive content. After preliminary processing, these data are transmitted to the central data processing unit in real time, recording the dynamic change curve of the adhesive content over time and storing it in a dedicated time series adhesive content database.

[0065] In addition, the system automatically collects an adhesive sample every 8 hours and sends it to a supporting chemical analysis laboratory for component analysis. The analysis contents include the resin substance content (using gas chromatography), the additive residue content (using liquid chromatography-mass spectrometry), and the microbial metabolite content (using a biosensor array technology). These chemical composition data, combined with the continuously monitored physical property data, constitute a comprehensive adhesive property dataset.

[0066] Based on the collected massive time series data, a dynamic correlation model between adhesive properties and papermaking process parameters is constructed. This model uses machine learning algorithms (mainly based on long short-term memory network LSTM) and can analyze the change rules of adhesive properties under different time periods (such as shift changes, seasonal changes) and different working conditions (such as raw material changes, product specification switches). For example, through analysis, it is found that when the proportion of recycled paper in the raw materials increases by 10% each time, the resin content in the adhesives increases by an average of 7.5% and reaches the peak 2 hours after production; while when the environmental temperature rises by 5°C, the average viscosity of the adhesives decreases by about 12%, and the separation difficulty increases accordingly. These correlation data form a time series database.

[0067] The core of this embodiment lies in converting the time series data of the continuously monitored stickies content into production control instructions. Based on at least three months of historical monitoring data, the system has established an intelligent early warning mechanism and set three dynamic thresholds: the normal threshold (below 0.5 grams per cubic meter of white water per hour), the early warning threshold (0.5 - 1.2 grams per cubic meter), and the alarm threshold (above 1.2 grams per cubic meter). These thresholds are not fixed but are automatically adjusted according to historical data and the current production conditions. For example, during the high-temperature period in summer (when the ambient temperature is above 30°C), the system will automatically lower each threshold by 15% to cope with the enhanced activity of stickies under high-temperature conditions; when producing special papers, the system will determine more accurate thresholds based on the historical data of specific products.

[0068] The system identifies the change trend and fluctuation pattern of the stickies content by comparing the current stickies content with the dynamic thresholds in real time. In particular, the system not only focuses on the absolute value but also analyzes the change rate. For example, when the continuously monitored data for three times shows an increasing stickies content and the growth rate exceeds 20% per hour, even if the absolute value has not reached the early warning threshold, the system will identify it as an abnormal trend and trigger an early warning.

[0069] When the stickies content reaches the early warning threshold or an abnormal growth trend is detected, the system automatically issues an early warning signal and adjusts the process parameters in real time. The adjustment contents include: increasing the dosage of the dispersant by 5 - 10%, increasing the operating frequency of the screening system, adjusting the pH value of the white water to weakly alkaline (pH 7.2 - 7.5), etc. These preventive adjustments can effectively inhibit the further accumulation of stickies and avoid the occurrence of production problems.

[0070] For example, in a certain actual production, at 10:23 in the morning, the system detected that the stickies content reached 0.62 grams per cubic meter, and the measurements showed an upward trend for three consecutive times, immediately triggering the early warning mechanism. The system automatically increased the dosage of the dispersant from the original 2.5 kg per ton of pulp to 2.8 kg per ton of pulp, and at the same time adjusted the pH value of the white water from 6.8 to 7.3. These timely adjustments caused the stickies content to start to decline after 30 minutes and return to the normal level (0.47 grams per cubic meter) after 1 hour, successfully avoiding the risk of equipment blockage.

[0071] When the stickies content reaches the alarm threshold or shows a sudden increase (e.g., more than 50% increase within 15 minutes), the system immediately notifies the operator through the factory's internal communication network and automatically initiates the emergency treatment process. Emergency treatment includes: significantly increasing the amount of cleaner used (usually 1.5 - 2 times the normal amount), temporarily reducing the white water recycling rate (from 85% to 60 - 70%), and conducting emergency cleaning of key equipment parts, etc. At the same time, the system continuously monitors the treatment effect. If the stickies content does not show a downward trend within 15 minutes, the emergency response level is further upgraded, and short-term shutdown treatment is considered if necessary. This hierarchical response mechanism forms a complete closed-loop emergency response system.

[0072] Based on continuously monitored data collected over a long period, the system can reveal the internal laws of stickies generation and achieve dynamic adaptive adjustment of production process parameters. Different from traditional fixed-parameter control, this system uses a fuzzy control algorithm according to real-time monitoring data to achieve continuous optimization and adjustment of key parameters in the papermaking process.

[0073] In terms of the addition amount of additives, the system has established a dynamic ratio model based on the type and content of stickies. For example, when it is detected that the proportion of resinous substances in the stickies exceeds 60%, the system will preferentially increase the amount of fatty acid dispersant used; while when the proportion of microbial metabolites is relatively high, the amount of fungicide used will be increased accordingly.

[0074] In terms of screening parameters, the system dynamically adjusts the vibration frequency, screen slot size, and screening pressure of the screening equipment according to the real-time data of the particle size distribution of stickies. For example, when it is monitored that the proportion of fine stickies (<100 microns) increases, the system will automatically reduce the screening pressure by 5 - 10%, increase the residence time, and improve the removal efficiency of fine particles.

[0075] In terms of the operating parameters of the white water circulation system, the system optimizes the circulation flow rate, sedimentation time, and temperature control strategy in real-time according to the trend of stickies content. For example, when it is detected that the stickies content continues to rise, the system will appropriately extend the sedimentation time and reduce the circulation ratio to "lighten the burden" on the system.

[0076] In terms of chemical composition analysis, the system uses a method combining a variety of advanced analysis techniques. Gas chromatography is used for the analysis of resinous substance content to focus on identifying components such as rosin, fatty acids, and resin acids. Liquid chromatography - mass spectrometry is used for the analysis of additive residue content, which can detect trace amounts of residual fixing agents, strengthening agents, and surface sizing agents, etc. Biosensor array technology is used for the analysis of microbial metabolite content to specifically detect extracellular polymers and metabolites produced by various microorganisms.

[0077] These chemical composition data are associated with production parameters to form an associated database, and various valuable rules are discovered through analysis. For example, when a large amount of coated paper is included in the raw materials, the contents of silicate and calcium carbonate in the stickies will increase significantly, and the dosage of chelating dispersant needs to be increased accordingly; after adding certain wet strength agents during the production process, the content of polyamide substances in the stickies will increase, and such stickies are more easily dispersed in an alkaline environment. These findings directly guide the formulation of production optimization strategies. Based on the monitoring of the stickies, the system establishes a comprehensive cost-benefit analysis model to calculate the input-output ratio and economic benefits of the monitoring system in real time. The cost analysis includes direct costs such as equipment investment, operation and maintenance, and personnel training, as well as indirect costs such as equipment cleaning, waste loss, downtime, and chemical consumption caused by sticky problems. The system also establishes a dynamic ROI monitoring mechanism to regularly update the benefit evaluation results.

[0078] In summary, through the continuous monitoring, real-time analysis, and intelligent control of the stickies in the papermaking white water in this embodiment, the dynamic optimization of the production process is achieved. The key innovation point of this method is to convert the continuously obtained sticky monitoring data into real-time control instructions for the production process, forming a complete closed-loop control system.

Claims

1. A continuous monitoring, separation and extraction system for adhesives in papermaking white water, characterized in that, Comprising: An installation frame body (10), inside which an integrated isolation frame (11) is provided, jointly forming a closed sampling space (12); the installation frame body (10) is directly installed at the branch sampling port of the white water conveying pipeline through a connecting flange to achieve on-line continuous sampling; A white water sampling system (20), including a white water input channel (21) provided with a flow control device and a sample stabilizing cavity (24), for continuously extracting white water samples from the white water conveying pipeline and transporting them to the closed sampling space (12), and the flow control device automatically adjusts the sampling volume according to the monitoring requirements; A sample pretreatment system (30), including a sampling component (31) that can rotate continuously, and the sampling component (31) is provided with a plurality of sampling paddle boards (311) distributed along the circumferential direction, and realizes continuous cyclic sampling of the white water sample through intermittent fixed-angle rotation; A hot air separation system (40) and a negative pressure extraction system (50) are arranged in sequence on the rotation path of the sampling paddle board (311) according to the technological sequence to perform continuous hot air drying and negative pressure extraction; A data acquisition and transmission module, including an adhesive weighing component (90) and a control input device (80), for real-time monitoring of the weight of the extracted adhesive and transmitting the monitoring data to the central control system of the papermaking production line; Wherein, the system realizes real-time continuous monitoring of the adhesive content in papermaking white water through 24-hour uninterrupted operation, and uses the monitoring results for dynamic adjustment and optimal control of the production process.

2. The adhesive continuous monitoring, separation and extraction system in the papermaking white water according to claim 1, characterized in that The sampling paddle board (311) is made of a porous composite material, including a stainless steel substrate and a special polymer coating.

3. The pressure sensor is arranged at the bottom of the separation tank, and the pressure sensor is connected to the control device through the signal line, and the control device is connected to the liquid inlet valve and the liquid outlet valve respectively through the control line. The hot air separation system (40) includes a hot air drying part (41) and a separation and adsorption part (42). The hot air drying part (41) adopts a segmented temperature gradient control design, the temperature of the inlet section is 45±2°C, the temperature of the middle section is 55±2°C, and the temperature of the outlet section is 65±2°C. Each temperature zone is equipped with an independent control system.

4. The adhesive continuous monitoring, separating and extracting system in the papermaking white water according to claim 3, wherein The adsorption force of the first adsorption element of the separation and adsorption part (42) is greater than the adsorption force of the sampling paddle board (311) on the white water sample film. The negative pressure extraction system (50) includes a second adsorption element (53), and the adsorption force of the second adsorption element (53) is greater than the adsorption force of the first adsorption element.

5. The adhesive continuous monitoring, separation and extraction system in the papermaking white water according to claim 1, wherein An integrated isolation structure (60) is arranged in the closed sampling space (12), including a rubber isolation board (62), and the rubber isolation board (62) opens a long strip gap (623) adapted to the size of the sampling paddle board (311) on the rotation path of the sampling paddle board (311).

6. The continuous monitoring, separation and extraction system for adhesives in papermaking white water according to claim 1, characterized in that, Also including: A drain hole channel (70), which is arranged at the bottom of the sampling space (12); the control input device (80) is arranged on the outer wall of the installation frame body (10); the adhesive weighing component (90) is arranged in the extraction housing (51).

7. The continuous monitoring, separation and extraction system for adhesives in papermaking white water according to claim 1, characterized in that, The white water sampling system (20) further includes a clean water input channel (22) and an output channel (23); a temperature control device and a pH adjustment system are arranged in the sample stabilization chamber (24), which can adjust the white water sample to the optimal detection state without changing the characteristics of the stickies; the white water sampling system (20) is also equipped with a self-cleaning device, which automatically flushes the pipeline and the chamber after sampling is completed.

8. A method for applying the stickies extracted from the system according to claim 1, characterized in that, It includes the following steps: Continuous extraction step: Use the system to continuously monitor and extract the stickies in the papermaking white water for 24 hours. Through the cyclic rotation of the sampling pulp board (311), continuous collection, separation and extraction of the sample are realized, and the extracted stickies are collected in the extraction container (54) in real time; Real-time analysis step: Use the stickies weighing device (90) to perform real-time quantitative measurement on the continuously extracted stickies, record the dynamic change curve of the stickies content over time, and establish a time series stickies content database; Dynamic feedback control step: Compare the time series data of the continuously monitored stickies content with the dynamic preset threshold in real time, identify the change trend and fluctuation law of the stickies content. When the stickies content exceeds the preset threshold or shows abnormal fluctuations, send a precise adjustment signal to the papermaking production line control system in time; Adaptive production optimization step: Based on the law of stickies generation revealed by the continuously monitored data, realize the dynamic adaptive adjustment of the papermaking process parameters, including real-time optimization of the additive dosage, continuous adjustment of the screening parameters and the operation state of the white water circulation system, form a closed-loop control system, continuously reduce the adverse effects of the stickies on the papermaking system, and improve the production stability and the consistency of the paper quality.

9. The application method of the adhesive according to claim 8, characterized in that The real-time analysis step further includes: continuously monitoring the physical properties of the stickies, and real-time recording the viscosity change curve, the dynamic change of the particle size distribution and the moisture content fluctuation; regularly analyzing the chemical composition of the continuously extracted stickies samples, tracking the time series changes of the resin substance content, the additive residue content and the microbial metabolite content; establishing a dynamic correlation model between the stickies characteristics and the papermaking process parameters, analyzing the change law of the stickies characteristics under different time periods and different working conditions, and forming a time-sequential correlation database to provide data support for the real-time control of the production process.

10. The application method of the adhesive according to claim 8, characterized in that, The dynamic feedback control step includes: establishing an intelligent early warning mechanism based on the continuously monitored data, setting three dynamic thresholds for the stickies content: normal, warning and alarm, and the thresholds are automatically adjusted according to the historical data and the current production conditions; when the continuously monitored data shows that the stickies content reaches the warning threshold or an abnormal growth trend is detected, the system automatically issues a warning signal and adjusts the process parameters in real time to prevent the accumulation of the stickies; when the continuously monitored data shows that the stickies content reaches the alarm threshold or a sudden increase occurs, the system immediately notifies the operator and starts the emergency treatment process, including increasing the amount of cleaning agent, temporarily reducing the white water recycling rate or performing emergency cleaning of the equipment, and continuously monitoring the treatment effect at the same time, forming a closed-loop emergency response mechanism.

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