A two-way self-adaptive anti-blocking system for preparing extinction curing agent

Abstract

The application relates to a two-path self-adaptive anti-blocking system for preparing extinction curing agents and belongs to the technical field of chemical production equipment. The system comprises a stirring buffer bin, a material pump, a centrifuge and a flash evaporator which are sequentially arranged; the stirring buffer bin is internally provided with a consistency detection unit; the system further comprises a constant-temperature hot solvent storage tank, a first path, a second path, a crushing unit, a switching unit and a control module. The control module is configured to: acquire a consistency signal and compare the consistency signal with a preset threshold value, if the consistency signal is lower than or equal to the threshold value, the switching unit is controlled to guide the material to the first path and into the flash evaporator, if the consistency signal exceeds the threshold value, an electric control valve is opened to supplement the hot solvent, meanwhile, the material is guided to the crushing unit through the second path and crushing is started. Through feedforward prediction and global adaptive adjustment, the application improves the problem that solvent ratio fluctuation easily causes pumping cavitation or air suction in the prior art.

Description

Technical Field

[0001] This application relates to the field of chemical production equipment, and in particular to a dual-path adaptive anti-clogging system for preparing matting curing agents. Background Technology

[0002] Currently, in the continuous production process of matting curing agents, the materials usually need to go through multiple process stages such as hydrolysis, filtration, centrifugal dehydration and high-temperature flash drying.

[0003] In existing continuous production lines, to prevent the high-moisture filter cake after centrifugal dehydration from directly entering the high-temperature flash evaporator and causing "thermal agglomeration"—where the material surface dries and forms a crust while the interior remains soft and moist, eventually clumping and blocking the feed inlet—conventional production line designs typically install a mechanical switching valve between the centrifuge and the flash evaporator, connecting a conventional anti-clogging crusher to one of the branches. In actual production, after centrifugal drying, the material is guided into the flash evaporator through the mechanical valve. When production personnel notice incomplete dehydration, they control the mechanical valve to direct the material to the anti-clogging crusher, where blades at a fixed rotation speed forcibly break it up before feeding it back into the flash evaporator for drying.

[0004] During the pumping of hydrolyzed feedstock to the centrifuge, fluctuations in the local solvent ratio at the upstream hydrolysis stage often cause a sudden spike in material concentration and premature precipitation. This extremely viscous material can cause a sudden increase in friction resistance along the conveying pipeline, easily leading to cavitation or suction problems in the material pump and severely interfering with the stability of continuous feed.

[0005] Most existing anti-clogging crushers adopt a fixed speed design. If high-speed operation is maintained for a long time when the material is normal, it will result in significant energy waste.

[0006] Regarding the aforementioned technologies, the inventors believe that existing systems lack a feedforward prediction and global adaptive adjustment mechanism for abnormal material states, which can easily lead to pump cavitation or air suction when the solvent ratio fluctuates. At the same time, the long-term high-speed operation of the fixed-speed crusher at the back end under normal working conditions also results in significant energy waste. Summary of the Invention

[0007] To address the issues of existing technologies where fluctuations in solvent ratios can easily lead to pump cavitation or air intake, and the energy waste caused by long-term high-speed operation of the downstream fixed-speed crusher under normal operating conditions, this application provides a dual-path adaptive anti-clogging system for preparing matte curing agents.

[0008] This application provides a dual-path adaptive anti-clogging system for preparing matte curing agents, which adopts the following technical solution: A dual-path adaptive anti-clogging system for preparing a matting curing agent includes a stirring buffer chamber, a material pump, a centrifuge, and a flash evaporator arranged sequentially along the material flow direction. The stirring buffer chamber is equipped with a consistency detection unit for outputting the consistency signal of the material within the stirring buffer chamber. The system also includes: A constant-temperature hot solvent storage tank is connected to the stirring buffer chamber and stores constant-temperature solvent inside. An electrically controlled valve is installed on the pipeline between the constant-temperature hot solvent storage tank and the stirring buffer chamber. When the electrically controlled valve is opened, the constant-temperature solvent flows to the stirring buffer chamber. Both the first passage and the second passage are located between the centrifuge discharge end and the flash evaporator inlet. Both the first passage and the second passage are used to transport materials. The first passage is connected to the flash evaporator. A crushing unit is connected to the discharge end of the second passage and the feed end of the flash evaporator. The crushing unit is located near the feed end of the flash evaporator and is used to crush materials. A switching unit is disposed at the feed end of the first passage and the second passage, and the switching unit is used to selectively guide the material to the first passage or the second passage; The control module is communicatively connected to the consistency detection unit, the electrically controlled valve, and the crushing unit. The control module is configured to: acquire a consistency signal and determine whether the consistency signal is higher than a preset consistency threshold. If the consistency signal is lower than or equal to a preset consistency threshold, an instruction is sent to the switching unit to direct the material to the first path. If the consistency signal exceeds the preset consistency threshold, the electronically controlled valve is opened, and an instruction is sent to the switching unit to guide the material to the second passage, and an instruction is sent to start the crushing unit.

[0009] By adopting the above technical solution, and by setting up a consistency detection unit in the stirring buffer chamber and linking it with the constant temperature hot solvent storage tank, the switching unit and the crushing unit, a feedforward adaptive adjustment mechanism based on the physical state of the material front end is established.

[0010] In terms of system operation mechanism, when the material consistency is detected to be within the normal range, the system control switching unit guides the material to be transported smoothly through the first channel; when the material consistency is detected to be excessive, that is, the material is in an abnormally high viscosity state that is very easy to clump together, the system automatically opens the electronic control valve to introduce constant temperature hot solvent to dynamically reduce viscosity at the source, and controls the switching unit to accurately guide the high-risk abnormal material to the second channel, and simultaneously starts the crushing unit to perform forced physical cell wall breaking and dispersion.

[0011] This improves upon the lack of proactive intervention capability of existing continuous equipment when faced with drastic fluctuations in the concentration of front-end materials. This prevents situations where high-viscosity materials cause obstruction of conveying pipelines and cavitation of material pumps, and where filter cake that has not been thoroughly dehydrated directly enters the high-temperature flash evaporator, causing "thermal agglomeration" and ultimately blocking the feed end.

[0012] Preferred options also include: A weighing unit is installed between the discharge end of the centrifuge and the feed end of the switching unit. The weighing unit is used to acquire the weight signal of the batch of material discharged after a single centrifugation process. The crushing unit includes a cutting component and a variable frequency drive component that drives the cutting component; The control module is also communicatively connected to the weighing unit and the frequency conversion drive component, respectively. The control module is also configured to execute the following control logic: The weighing unit obtains the weight signal of the batch of materials, and the control module receives the weight signal. When the control module determines that the consistency signal exceeds a preset consistency threshold, it further determines the weight signal: If the weight signal is lower than or equal to a preset weight threshold, an instruction is sent to the frequency converter drive component to start the cutting component at a first preset speed. If the weight signal is higher than the preset weight threshold, an instruction is sent to the frequency converter drive component to start the cutting component at a second preset speed. The second preset speed is greater than the first preset speed.

[0013] By adopting the above technical solution, a weighing unit and a crushing unit with variable frequency drive components were added to the downstream of the system, thus constructing a cascade speed regulation mechanism based on the physical properties of the material at the downstream end.

[0014] In terms of operation, the system utilizes the fixed single-feed volume of the centrifuge to obtain the overall weight of the batch of material discharged after the centrifugation process through a weighing unit. When the consistency exceeds the standard at the front end, the material's density increases significantly due to abnormally high solid content or gelation and agglomeration, easily causing the centrifuge filter to become blind and trap residual liquid. Therefore, under the premise of a constant feed volume, the heavier the discharged material, the lower its internal porosity and the more liquid it retains, indicating a higher degree of transformation from a conventional loose and porous state to a dense, wet, and viscous state. When the excessive consistency at the front end triggers cell-wall breaking and diversion, the control module further adjusts the crushing unit's speed adaptively based on this weight signal: when the weight is within the normal range, a standard shear force is provided at the first preset speed; when the weight exceeds the standard, the speed is automatically increased to the second preset speed to output stronger cell-wall breaking kinetic energy.

[0015] Preferably, the switching unit includes a conveyor belt and a bidirectional drive motor, with the first passage and the second passage respectively located at both ends of the conveyor belt, and the conveyor belt is driven by the bidirectional drive motor.

[0016] By adopting the above technical solution, this application concretizes the switching unit into a conveyor belt driven by a bidirectional drive motor, and sets the first path and the second path at two ends, thus constructing a physical diversion structure.

[0017] In terms of operation, the system can directly complete the switching of material routes and directional conveying by controlling the bidirectional drive motor to change the rotation direction of the conveyor belt.

[0018] Preferably, the control module is further configured to: when it is determined that the consistency signal is lower than or equal to a preset consistency threshold, send a power-off sleep command to the crushing unit.

[0019] By adopting the above technical solution, when the control module determines that the front-end consistency signal is within the normal range, it will simultaneously send an electrical power-off hibernation command to the crushing unit located at the rear of the second path. This control logic ensures that the high-energy-consuming crushing equipment is only activated when the system encounters abnormal materials, while remaining in a power-off and silent state for most of the normal operating time of the production line.

[0020] Preferably, the centrifuge is a batch centrifuge, in which the batch of material discharged after a single centrifugation process has a fixed volume, and the weight signal obtained by the weighing unit is used to characterize the density or wet viscosity of the batch of material, provided that the volume of the batch of material is fixed.

[0021] By adopting the above technical solution, a batch processing centrifuge was clearly selected, and a fixed volume benchmark for single discharge was established from the source of the physical process.

[0022] In terms of detection mechanism, this scheme ingeniously transforms complex physical property analysis into basic mechanical measurement. Since the total volume of a batch of material discharged in a single run remains constant, based on the positive correlation between weight and density, and combined with the aforementioned physical phenomenon that high-viscosity abnormal materials are prone to internal pore liquid sealing, the system can use this single weight signal to indirectly quantify and deduce the true dehydration rate and wet adhesion degree inside the batch of material with remarkable stability.

[0023] Preferably, the output shaft of the bidirectional drive motor is used to drive the conveyor belt to rotate in the forward direction to guide the material to the first discharge end, or to rotate in the reverse direction to guide the material to the second discharge end.

[0024] Preferably, the temperature range of the constant-temperature solvent in the constant-temperature hot solvent storage tank is 90°C to 95°C; The control module is also configured to: control the opening duration of the electronically controlled valve based on the difference between the consistency signal and the preset consistency threshold, so as to adjust the amount of solvent flowing to the stirring buffer chamber.

[0025] Preferably, the control module is further configured to execute the following control logic: When the acquired consistency signal exceeds a preset consistency threshold, the control module records the exceeding event and starts timing. If the number of times the density signal exceeds the preset density threshold within the preset time window reaches the preset number threshold, the control module determines it as a continuous abnormal working condition and sends an early warning signal to the external monitoring system. If the consistency signal recovers to below or equal to the preset consistency threshold within the preset time window, the control module will remove the record of this out-of-range event and maintain the instruction to guide the material to the first channel.

[0026] By adopting the above technical solution, the system uses time-series tracking to distinguish between transient fluctuations and persistent faults in the consistency anomalies captured by the front end. If the consistency signal is only temporarily exceeding the standard due to uneven mixing of local materials or the sensor capturing air bubbles or burrs, the system will automatically delete the record and maintain normal and stable delivery after confirming that it has fallen back within the time window, thus achieving software anti-jitter at the system level. However, when a systemic fault such as hydrolysis and batch imbalance occurs, causing the frequency of exceeding the standard to reach the threshold, the system will accurately lock the persistent abnormal state and promptly trigger an external warning so that on-site engineers can quickly intervene to investigate the source.

[0027] Preferably, the crushing unit further includes a housing, the inside of which forms a crushing chamber. The top of the housing is provided with an inlet communicating with the discharge end of the second passage, and the bottom of the housing is provided with an outlet communicating with the inlet of the flash evaporator. The cutting assembly is rotatably disposed in the crushing chamber. The cutting assembly includes a rotating shaft and multiple sets of blades arranged axially at intervals along the rotating shaft. The frequency conversion drive assembly is installed outside the housing, and its output end is connected to the rotating shaft for transmission.

[0028] Preferably, the discharge port and the feed port of the flash evaporator are directly connected or connected through a flexible sealing pipe, so that the material crushed by the cutting component falls directly into the flash evaporator under the action of gravity.

[0029] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a consistency detection unit in the mixing buffer chamber and linking it with the constant-temperature hot solvent storage tank, switching unit, and crushing unit, a feedforward adaptive adjustment mechanism based on the physical state of the material at the front end was established. When the consistency exceeds the standard, hot solvent is automatically introduced to dynamically reduce viscosity at the source, and the switching unit is linked to precisely guide the high-risk material to the second channel for forced cell wall breaking. This improves the situation in existing continuous equipment where the lack of front-end active intervention capabilities leads to obstruction of the conveying pipeline and cavitation of the material pump caused by high-viscosity materials, as well as the situation where heavily agglomerated filter cake that has not been thoroughly dehydrated directly enters the high-temperature flash evaporator, causing thermal agglomeration and eventually blocking the feed end. 2. By adding a weighing unit and a crushing unit with variable frequency drive components to the downstream section of the batch centrifuge, the weight signal is converted into an accurate characterization of the liquid sealing effect and wet stickiness of the material by taking advantage of the fixed feed volume. Based on this, the crusher is adjusted in stages to achieve adaptive speed regulation. This improves the situation in the existing anti-clogging system where the crushing equipment with a single fixed speed is prone to jamming due to insufficient shearing force when encountering extremely wet stickiness and heavy filter cake formed by high-consistency materials due to dense agglomeration and dehydration failure, which can lead to equipment overload and shutdown. 3. By using time-series tracking, the transient fluctuations and persistent faults of the consistency anomalies captured by the front end can be identified, so that on-site engineers can quickly intervene to investigate the source. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a dual-path adaptive anti-clogging system for preparing a matte curing agent according to an embodiment of this application.

[0031] Figure 2 This is a schematic diagram of the structure of the crushing unit in the embodiments of this application.

[0032] Figure 3 This is a schematic diagram of the control logic flow of the control module in the embodiments of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Hydrolysis vessel; 2. Filter; 3. Stirring buffer tank; 4. Material pump; 5. Reactor; 6. Centrifuge; 7. Flash evaporator; 8. Consistency detection unit; 9. Constant temperature hot solvent storage tank; 10. Electrically controlled valve; 11. First passage; 12. Second passage; 13. Switching unit; 14. Weighing unit; 15. Control module; 16. Crushing unit. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0035] This application discloses a dual-path adaptive anti-clogging system for preparing matte curing agents. (Refer to...) Figures 1-3As shown, a dual-path adaptive anti-clogging system for preparing a matting curing agent includes a hydrolysis vessel 1, a filter 2, a stirring buffer chamber 3, a material pump 4, a reaction vessel 5, a centrifuge 6, and a flash evaporator 7 arranged sequentially along the material flow direction. The stirring buffer chamber 3 is equipped with a stirring device, which includes a motor and stirring blades mounted on the motor. It also includes a consistency detection unit 8 for outputting the consistency signal of the material in the stirring buffer chamber. The consistency detection unit 8 uses an online rotary viscometer. The system further includes a constant-temperature hot solvent storage tank 9, connected to the stirring buffer chamber 3, which stores constant-temperature solvent. An electrically controlled valve 10 is installed on the pipeline between the constant-temperature hot solvent storage tank 9 and the stirring buffer chamber 3. When the electrically controlled valve 10 is open, the constant-temperature solvent flows to the stirring buffer chamber 3. A first passage 11 and a second passage 12 are both located at the discharge end of the centrifuge 6 and the flash evaporator. Between the feed inlets of the flash evaporator 7, both the first passage 11 and the second passage 12 are used to transport materials. The first passage 11 is connected to the flash evaporator 7. The crushing unit 16 is connected to the discharge end of the second passage 12 and the feed end of the flash evaporator 7. The crushing unit 16 is close to the feed end of the flash evaporator 7 and is used to crush materials. The switching unit 13 is located at the feed ends of the first passage 11 and the second passage 12. The switching unit 13 is used to selectively guide materials to the first passage 11 or the second passage 12. The switching unit 13 uses a servo motor or a stepper motor. The control module 15 is communicatively connected to the consistency detection unit 8, the solenoid valve 10, and the crushing unit 16. The control module 15 is configured to: acquire a consistency signal and determine whether the consistency signal is higher than a preset consistency threshold. The control module 15 can be an industrial computer.

[0036] If the consistency signal is lower than or equal to the preset consistency threshold, an instruction to guide the material to the first passage 11 is sent to the switching unit 13. If the consistency signal exceeds the preset consistency threshold, the control valve 10 is opened, and a command is sent to the switching unit 13 to guide the material to the second passage 12, and a command is sent to start the crushing unit 16.

[0037] The control module 15 has a pre-set consistency deviation calculation model, and its specific calculation formula is as follows: ; in, This is the consistency deviation value; This represents the real-time consistency signal value acquired by the online rotary viscometer at time t. This is the upper limit of the normal consistency threshold preset by the system. When When ≤0, the material condition is considered good; when When the value is greater than 0, the material is judged to have become abnormally thickened.

[0038] It should be further noted that the preset consistency threshold and its upper limit mentioned in this application are... The specific value is not arbitrarily set, but is obtained by comprehensive calibration based on the hydrodynamic characteristics of the downstream conveying equipment, namely the material pump, and historical stable production data. Specifically, the preset consistency threshold corresponds to 85% to 95% of the maximum apparent viscosity of the fluid that the material pump can maintain laminar flow without cavitation at rated power.

[0039] In actual industrial deployment, technicians extract historical consistency peak data from the production line during a month of continuous, blockage-free, and stable operation, perform statistical envelope analysis, and establish the upper edge value of this envelope as the preset consistency threshold for the system, thereby ensuring that the early warning line can sensitively detect anomalies.

[0040] To achieve precise dilution and viscosity reduction of high-risk materials, the control module 15 dynamically adjusts the opening duration of the electrically controlled valve based on the magnitude of the viscosity difference, using a proportional control model. The adjustment formula is as follows: ; in, The target opening duration of the electrically controlled valve; This is the preset solvent compensation ratio coefficient; The calculated consistency deviation is positive. This is the basic pipeline cleaning start time set for the system. This formula ensures that the more viscous the material, the greater the amount of hot solvent automatically allocated by the system and the longer the viscosity reduction time.

[0041] To achieve precise control over the opening duration of the electronically controlled valve and reduce the risk of insufficient viscosity reduction due to insufficient solvent injection or excessive material dilution due to excessive injection, this application further discloses the aforementioned solvent compensation ratio coefficient. The offline experimental calibration process specifically includes the following steps: Sample preparation and initial data acquisition: In the experimental environment, samples were measured at different levels of excess consistency. Multiple sets of high-viscosity material samples of matte curing agents were collected, and their initial positive consistency deviation values ​​were recorded. ).

[0042] Dynamic viscosity reduction test: Under a constant stirring rate matching the actual stirring buffer chamber, constant temperature hot solvent with a temperature set to 90℃ to 95℃ was uniformly injected into each of the above sample groups, and the real-time consistency of the material was continuously monitored using an online rotary viscometer.

[0043] Threshold critical point recording: Records the real-time consistency of each group of material samples when it just falls back to the preset normal consistency threshold. When ), the total volume or total mass of the isothermal hot solvent consumed.

[0044] Compensation time conversion: Combining the pipeline delivery pressure and the rated flow coefficient (Cv value) of the selected solenoid valve, the total volume of hot solvent consumed measured in the above steps is converted into the theoretical opening compensation time required for the solenoid valve to reach the injection volume.

[0045] Generation coefficient: Positive values ​​of consistency deviation measured in multiple sets. Using the x-axis as the plot and the corresponding theoretical activation time of the compensation as the y-axis, a scatter plot of the data was created and fitted with a linear regression. The slope of this fitted line is the solvent compensation ratio coefficient generated during calibration. .

[0046] It also includes: a weighing unit 14, which is located between the discharge end of the centrifuge 6 and the feed end of the switching unit 13. The weighing unit 14 is used to acquire the weight signal of the batch of material discharged after a single centrifugation process. The weighing unit 14 adopts a piezoresistive weighing sensor. The crushing unit 16 includes a cutting component and a frequency conversion drive component that drives the cutting component. The frequency conversion drive component adopts an industrial frequency converter and a three-phase asynchronous AC motor. The control module 15 is also communicatively connected to the weighing unit 14 and the frequency conversion drive component. The control module 15 is also configured to execute the following control logic: the weighing unit 14 acquires the weight signal of the batch of material, and the control module 15 receives the weight signal. When the control module 15 determines that the consistency signal exceeds a preset consistency threshold, it further determines the weight signal. If the weight signal is lower than or equal to the preset weight threshold, it sends an instruction to the frequency conversion drive component to start the cutting component at a first preset speed. If the weight signal is higher than the preset weight threshold, a command is sent to the frequency converter drive component to start the cutting component at the second preset speed. The second preset speed is greater than the first preset speed.

[0047] It should be further explained that the physical mechanism by which weight signals are used to characterize the abnormal wetness and viscosity of materials in this application is as follows: Assuming the volume of material entering centrifuge 6 in a single batch remains constant (i.e., the feed volume), the total weight of the batch discharged after centrifugation and dehydration of high-consistency material is typically significantly greater than that of normal-consistency material. This difference is mainly caused by the following physical mechanisms: An abnormally high consistency at the material tip usually indicates that, in the same volume of feed slurry, the volume proportion of suspended solids is significantly higher than that of the solvent, or that the material has undergone premature cross-linking and agglomeration. Since the actual density of solid particles such as matting curing agents is greater than that of conventional solvents, under a constant feed volume, the initial total mass of high-consistency material is inherently higher than that of normally proportioned low-consistency material.

[0048] The calibration logic for the preset weight threshold described in this application is as follows: During system initialization or production changeover debugging, technicians collect multiple batches of normal, qualified dehydrated material samples and multiple batches of simulated viscous material samples by deliberately increasing the front-end consistency. By statistically comparing the weight distribution ranges of the two sets of samples under a constant discharge volume, the median of the safety margin between the upper limit normal deviation value of the normal material weight distribution range and the lower limit normal deviation value of the viscous material weight distribution range is selected as the preset weight threshold.

[0049] In the centrifugal dehydration process, the solid-liquid separation process of normal low-viscosity materials is relatively smooth. A large amount of solvent can be effectively discharged through the filter screen, and the remaining solid filter cake is mainly filled with air, forming a loose and porous lightweight state.

[0050] Conversely, materials with abnormally high viscosity have extremely high stickiness and will quickly clog the filter screen under centrifugal force. As a result, a large amount of solvent inside the material cannot be dialyzed out and is instead trapped and sealed inside the filter cake. This residual liquid that cannot be discharged fills the pore spaces that should belong to air.

[0051] Therefore, under the same feed volume conditions, the product discharged after centrifugation of high-consistency materials is a high-density solid block rich in unremoved liquid, and its total weight is significantly greater than that of the loose filter cake filled with air pores after normal dehydration.

[0052] The switching unit 13 includes a conveyor belt and a bidirectional drive motor. The first passage 11 and the second passage 12 are respectively located at both ends of the conveyor belt, which is driven by the bidirectional drive motor.

[0053] The control module 15 is also configured to send a power-off sleep command to the crushing unit 16 when the consistency signal is determined to be lower than or equal to a preset consistency threshold.

[0054] Centrifuge 6 is a batch centrifuge 6, in which the batch of material discharged after a single centrifugation process has a fixed volume. The weight signal obtained by weighing unit 14 is used to characterize the density or wet viscosity of the batch of material, provided that the volume of the batch of material is fixed.

[0055] The output shaft of the bidirectional drive motor is used to drive the conveyor belt to rotate in the forward direction to guide the material to the first discharge end, or to rotate in the reverse direction to guide the material to the second discharge end.

[0056] The temperature range of the constant-temperature solvent in the constant-temperature hot solvent storage tank 9 is 90℃ to 95℃; The control module 15 is also configured to control the opening duration of the electronically controlled valve 10 based on the difference between the consistency signal and the preset consistency threshold, so as to adjust the amount of solvent flowing to the stirring buffer chamber 3.

[0057] Control module 15 is also configured to execute the following control logic: When the acquired consistency signal exceeds the preset consistency threshold, the control module 15 records the exceeding event and starts timing; If the number of times the consistency signal exceeds the preset consistency threshold within the preset time window reaches the preset number threshold, the control module 15 determines it as a continuous abnormal working condition and sends an early warning signal to the external monitoring system. If the consistency signal recovers to below or equal to the preset consistency threshold within the preset time window, the control module 15 will remove the record of this out-of-range event and maintain the instruction to guide the material to the first passage 11.

[0058] The control module 15 uses a sliding time window monitoring algorithm to identify transient fluctuations, and triggers a continuous anomaly warning when the following condition is met: ; in, This is the preset monitoring time window length; This is the initial time at which excessive consistency is first detected; I( >0) is a Boolean indicator function for the over-limit event (when If the value is greater than 0, record it as 1; otherwise, record it as 0. This is a preset threshold for the number of consecutive violations. When the accumulated score within this window reaches or exceeds [a certain threshold]... When this occurs, the system determines that a non-incidental imbalance in the feed distribution has occurred in the front-end pipeline, and thus sends an early warning signal to the external monitoring system.

[0059] Preset monitoring time window length and the threshold for consecutive exceedances The specific value is determined by those skilled in the art based on historical operating experience of the production line and data from multiple on-site debugging sessions.

[0060] The crushing unit 16 also includes a housing, inside which a crushing chamber is formed. The top of the housing is provided with an inlet that communicates with the discharge end of the second passage 12, and the bottom of the housing is provided with an outlet that communicates with the inlet of the flash evaporator 7. The cutting assembly is rotatably disposed in the crushing chamber. The cutting assembly includes a rotating shaft and multiple sets of blades arranged axially along the rotating shaft. A frequency conversion drive assembly is installed outside the housing, and its output end is connected to the rotating shaft for transmission.

[0061] The discharge port and the feed port of the flash evaporator 7 are directly connected or connected through a flexible sealing pipe, so that the material after being crushed by the cutting component falls directly into the flash evaporator 7 under the action of gravity.

[0062] The implementation principle of the dual-path adaptive anti-clogging system for preparing matting curing agent in this application embodiment is as follows: During the continuous production process of the system, the material enters the stirring buffer chamber 3 sequentially through the hydrolysis kettle 1 and the filter 2. During this period, the motor of the stirring device continuously drives the stirring blade to rotate, physically homogenize and mix the material entering the chamber, and prevent the material from settling.

[0063] During this process, the industrial computer, acting as the control module 15, polls and acquires the consistency signal of the material in the buffer chamber output by the online rotary viscometer in real time. When the material is in good condition, i.e., the consistency signal is lower than or equal to the preset consistency threshold, the control module 15 instructs the bidirectional drive motor of the switching unit 13 to rotate in the forward direction, guiding the conventional material after centrifugal dehydration to fall directly into the flash evaporator 7 through the first passage 11 for drying; at the same time, the control module 15 sends a power-off sleep command to the crushing unit 16 at the end of the second passage 12 to reduce the power consumption and mechanical wear during normal system operation.

[0064] When fluctuations in the front-end operating conditions cause the material to become abnormally thickened, i.e., the consistency signal exceeds the preset consistency threshold, the control module 15 immediately opens the electrically controlled valve 10 on the pipeline and introduces a constant temperature hot solvent of 90°C to 95°C from the storage tank as needed to dynamically dilute and reduce the viscosity of the material. At the same time, the control module 15 instructs the bidirectional drive motor to rotate in the opposite direction, accurately guiding the high-risk material dehydrated by the centrifuge 6 to the second passage 12 and activating the crushing unit 16.

[0065] The control module 15 further reads the weight signal of the batch material of a fixed volume measured by the weighing unit 14 to evaluate the water retention degree and wet stickiness of the material: if the weight signal is lower than or equal to the preset weight threshold, the variable frequency drive component is controlled to drive the cutting component at the first preset speed; if the weight signal is higher than the preset weight threshold, it indicates that the material is in a critical state of extreme wet stickiness and high density due to the obstruction of dehydration, so the variable frequency drive component is controlled to increase to a larger second preset speed, and strong shearing force is output by high speed and high torque to forcibly tear and disperse the densely clumped filter cake before sending it into the flash evaporator 7.

[0066] Furthermore, with the cooperation of the system's timing monitoring logic, the control module 15 can intelligently identify transient fluctuations and persistent faults by recording the frequency of exceedances within the time window, and output early warnings to the outside when there are continuous anomalies. Through the above-mentioned process coordination, the system effectively reduces local jamming caused by high-moisture and viscous materials during pipeline transportation and mechanical reversal, and significantly reduces the risk of thermal agglomeration and equipment overload shutdown after the material enters the flash evaporator 7, thereby improving the automation fault tolerance and operational stability of the entire production line.

[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dual-path adaptive anti-clogging system for preparing matte curing agents, characterized in that: The system includes a stirring buffer chamber (3), a material pump (4), a centrifuge (6), and a flash evaporator (7) arranged sequentially along the material flow direction. The stirring buffer chamber (3) is equipped with a consistency detection unit (8) for outputting the consistency signal of the material within the stirring buffer chamber (3). It also includes: A constant temperature hot solvent storage tank (9) is connected to the stirring buffer chamber (3) and stores constant temperature solvent inside. An electric control valve (10) is installed on the pipeline between the constant temperature hot solvent storage tank (9) and the stirring buffer chamber (3). When the electric control valve (10) is opened, the constant temperature solvent flows to the stirring buffer chamber (3). The first passage (11) and the second passage (12) are both located between the discharge end of the centrifuge (6) and the feed inlet of the flash evaporator (7). The first passage (11) and the second passage (12) are both used to transport materials. The first passage (11) is connected to the flash evaporator (7). A crushing unit (16) is connected to the discharge end of the second passage (12) and the feed end of the flash evaporator (7). The crushing unit (16) is close to the feed end of the flash evaporator (7) and is used to crush materials. A switching unit (13) is provided at the feed end of the first passage (11) and the second passage (12). The switching unit (13) is used to selectively guide the material to the first passage (11) or the second passage (12). The control module (15) is communicatively connected to the consistency detection unit (8), the electrically controlled valve (10), and the crushing unit (16); The control module (15) is configured to: acquire a consistency signal and determine whether the consistency signal is higher than a preset consistency threshold. If the consistency signal is lower than or equal to the preset consistency threshold, an instruction is sent to the switching unit (13) to guide the material to the first passage (11); If the consistency signal exceeds the preset consistency threshold, the electronic control valve (10) is opened, and an instruction is sent to the switching unit (13) to guide the material to the second passage (12), and an instruction is sent to start the crushing unit (16); Weighing unit (14) is located between the discharge end of the centrifuge (6) and the feed end of the switching unit (13). The weighing unit (14) is used to obtain the weight signal of the batch of material discharged after a single centrifugation process. The crushing unit (16) includes a cutting component and a frequency conversion drive component for driving the cutting component; The control module (15) is also communicatively connected to the weighing unit (14) and the frequency converter drive assembly, respectively; The control module (15) is also configured to execute the following control logic: The weighing unit (14) obtains the weight signal of the batch of materials, and the control module (15) receives the weight signal; When the control module (15) determines that the consistency signal exceeds a preset consistency threshold, it further determines the weight signal: If the weight signal is lower than or equal to a preset weight threshold, an instruction is sent to the frequency converter drive component to start the cutting component at a first preset speed. If the weight signal is higher than the preset weight threshold, an instruction is sent to the frequency converter drive component to start the cutting component at a second preset speed. Wherein, the second preset speed is greater than the first preset speed; The centrifuge (6) is a batch centrifuge (6), which discharges a batch of materials with a fixed volume after a single centrifugation process. The weight signal obtained by the weighing unit (14) is used to characterize the density or wet viscosity of the batch of materials under the premise that the volume of the batch of materials is fixed. The control module (15) is also configured to: control the opening duration of the electronically controlled valve (10) according to the difference between the consistency signal and the preset consistency threshold, so as to adjust the amount of solvent flowing to the stirring buffer chamber (3); The control module (15) is also configured to execute the following control logic: When the obtained consistency signal exceeds the preset consistency threshold, the control module (15) records the over-limit event and starts timing; If the number of times the density signal exceeds the preset density threshold within the preset time window reaches the preset number threshold, the control module (15) determines that it is a continuous abnormal working condition and sends an early warning signal to the external monitoring system. If the consistency signal recovers to below or equal to the preset consistency threshold within the preset time window, the control module (15) will cancel the record of this over-limit event and maintain the instruction to guide the material to the first passage (11). The preset consistency threshold corresponds to 85% to 95% of the maximum apparent viscosity of the fluid that the material pump (4) can maintain laminar flow and without cavitation at rated power.

2. The dual-path adaptive anti-clogging system for preparing matte curing agents according to claim 1, characterized in that: The switching unit (13) includes a conveyor belt and a bidirectional drive motor. The first passage (11) and the second passage (12) are respectively located at both ends of the conveyor belt, and the conveyor belt is driven by the bidirectional drive motor.

3. The dual-path adaptive anti-clogging system for preparing matte curing agents according to claim 1, characterized in that: The control module (15) is also configured to: when it is determined that the consistency signal is lower than or equal to a preset consistency threshold, issue a power-off sleep command to the crushing unit (16).

4. The dual-path adaptive anti-clogging system for preparing matte curing agents according to claim 2, characterized in that: The output shaft of the bidirectional drive motor is used to drive the conveyor belt to rotate in the forward direction to guide the material to the first discharge end, or to rotate in the reverse direction to guide the material to the second discharge end.

5. The dual-path adaptive anti-clogging system for preparing matte curing agents according to claim 1, characterized in that: The temperature range of the constant-temperature solvent in the constant-temperature hot solvent storage tank (9) is 90°C to 95°C.

6. The dual-path adaptive anti-clogging system for preparing matte curing agents according to claim 1, characterized in that: The crushing unit (16) also includes a housing, inside which a crushing chamber is formed. The top of the housing is provided with an inlet that communicates with the discharge end of the second passage (12), and the bottom of the housing is provided with an outlet that communicates with the inlet of the flash evaporator (7). The cutting assembly is rotatably disposed in the crushing chamber. The cutting assembly includes a rotating shaft and multiple sets of blades arranged axially along the rotating shaft. The frequency conversion drive assembly is installed outside the housing, and its output end is connected to the rotating shaft for transmission.

7. The dual-path adaptive anti-clogging system for preparing matte curing agents according to claim 6, characterized in that: The discharge port is directly connected to the feed port of the flash evaporator (7) or connected through a flexible sealing pipe, so that the material after being crushed by the cutting component falls directly into the flash evaporator (7) under the action of gravity.

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