Ethylene glycol antimony reaction process uniformity control system

Abstract

The application relates to the technical field of automatic control, and discloses a glycol antimony reaction process uniformity regulation system, which comprises a reaction monitoring module, a data processing module, a deviation detection module, a state recognition module and a reaction regulation module; wherein: the reaction monitoring module is used for collecting reaction process data of a glycol antimony reaction; the data processing module constructs a reaction characteristic sequence based on the reaction process data; the deviation detection module detects a non-uniformity criterion of the glycol antimony reaction based on the reaction characteristic sequence; the state recognition module recognizes a non-uniform state of the glycol antimony reaction based on the non-uniformity criterion; and the reaction regulation module matches and executes a corresponding uniformity regulation strategy based on the non-uniform state. The application can improve the material mixing and mass transfer state in the glycol antimony reaction process, and improve the reaction process stability and product quality consistency.

Description

Technical Field

[0001] This application relates to the field of automation control technology, specifically to a system for regulating the uniformity of the antimony glycol reaction process. Background Technology

[0002] In the industrial preparation of crystalline antimony glycol, the reaction system is typically in a dynamic coupling state of solid-liquid heterogeneous reaction – vacuum extraction of low molecular weight molecules – homogeneous transformation – cooling nucleation and crystallization. Although existing technologies have improved macroscopic conditions through reactor structure optimization and low-energy stirring, some problems still exist in industrial production. The reaction process varies in different regions within the reactor, such as localized premature or delayed reactions, uneven mixing, or localized concentration enrichment. While stirring reduces overall energy consumption, uneven local energy input creates high-shear and stagnant zones. These problems essentially manifest as uneven spatial distribution of the reaction driving force. Existing control methods only operate at the equipment parameter level, lacking direct measurement methods, making it difficult to identify localized non-uniformity trends within the reaction system and to target these non-uniformities with directional adjustments.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] The technical problem to be solved by this application is to overcome the defects of the prior art and provide a uniformity control system for the antimony glycol reaction process, improve the material mixing and mass transfer state in the antimony glycol reaction process, and improve the stability of the reaction process and the consistency of product quality.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution: A system for controlling the uniformity of an antimony glycol reaction process includes a reaction monitoring module, a data processing module, a deviation detection module, a state identification module, and a reaction regulation module; wherein: The reaction monitoring module is used to collect reaction process data for the antimony glycol reaction; The data processing module constructs a reaction characteristic sequence based on the reaction process data; The deviation detection module detects the non-uniformity criteria of the antimony glycol reaction based on the reaction characteristic sequence. The state recognition module identifies the non-uniform state of the antimony glycol reaction based on the aforementioned non-uniformity criterion. The reaction regulation module matches and executes the corresponding uniformity regulation strategy based on the non-uniform state.

[0006] As a preferred embodiment of the antimony glycol reaction process uniformity control system described in this application, the reaction process data includes reaction temperature data, volatilization response data, and stirring load data. The reaction monitoring module includes a first acquisition unit; the first acquisition unit includes multiple temperature monitoring points set inside the reaction vessel for acquiring reaction temperature data; the reaction temperature data includes the temperature value of each temperature monitoring point. The volatile response data includes the vacuum pressure value and the amount of ethylene glycol distilled out; the stirring load data includes the operating load of the stirring motor; The reaction monitoring module is configured with a continuous monitoring cycle; at the beginning of each monitoring cycle, the corresponding reaction process data is collected synchronously once. The reaction feature sequence includes a time series of data for each reaction process.

[0007] As a preferred embodiment of the antimony glycol reaction process uniformity control system described in this application, the non-uniformity criterion includes a temperature deviation criterion; the deviation detection module includes a first detection unit; the first detection unit is configured with a first detection strategy for detecting the temperature deviation criterion; the first detection strategy specifically includes: Calculate the temperature change rate of each temperature monitoring point in each monitoring cycle; for any monitoring cycle, calculate the temperature rate deviation of each temperature monitoring point; for any monitoring cycle, the temperature rate deviation of any temperature monitoring point is the difference between its temperature change rate and the mean of the temperature change rates of all temperature monitoring points. The temperature deviation criteria include a first deviation criterion and a second deviation criterion; if the temperature rate deviation of any temperature monitoring point in the most recent M monitoring cycles is greater than the corresponding first temperature deviation threshold, then the temperature monitoring point satisfies the first deviation criterion; M is a positive integer; if the temperature rate deviation of any temperature monitoring point in the most recent M monitoring cycles is less than the corresponding second temperature deviation threshold, then the temperature monitoring point satisfies the second deviation criterion.

[0008] As a preferred embodiment of the antimony glycol reaction process uniformity control system described in this application, the first detection strategy further includes calculating the temperature change rate of any temperature monitoring point in each monitoring cycle, specifically including: marking any monitoring cycle as a target cycle; extracting a target time window from the time series of temperature values ​​of the corresponding temperature monitoring point; the target time window includes the target cycle and N-1 consecutive monitoring cycles preceding the target cycle; N is a positive integer; calculating the ratio of the temperature value change in the target time window to the length of the target time window as the temperature change rate of the target cycle.

[0009] As a preferred embodiment of the antimony glycol reaction process uniformity control system described in this application, the non-uniformity criterion further includes a volatilization hysteresis criterion; the deviation detection module further includes a second detection unit; the second detection unit is configured with a second detection strategy for detecting the volatilization hysteresis criterion; the second detection strategy specifically includes: Calculate the pressure change and the volatile response change for each monitoring cycle. For any monitoring cycle, the pressure change is the difference between the vacuum pressure value of the current monitoring cycle and the vacuum pressure value of the adjacent previous monitoring cycle, and the volatile response change is the difference between the ethylene glycol distillation amount of the current monitoring cycle and the ethylene glycol distillation amount of the adjacent previous monitoring cycle. If the pressure change in any monitoring cycle is greater than the preset pressure change threshold, then the monitoring cycle is marked as a valid change cycle. Based on the change in the volatile response, it is determined whether an effective volatile response occurs in each effective change cycle; if no effective volatile response occurs in the most recent K consecutive effective change cycles, then the volatile hysteresis criterion is satisfied; K is a positive integer.

[0010] As a preferred embodiment of the antimony glycol reaction process uniformity control system described in this application, the second detection strategy includes determining whether an effective volatilization response occurs in any effective change cycle, specifically including: constructing a corresponding response observation window for any effective change cycle; the response observation window includes the corresponding effective change cycle and the subsequent m-1 consecutive monitoring cycles; m is a positive integer; if the volatilization response change in all monitoring cycles within the corresponding response observation window is less than a preset response change threshold, then no effective volatilization response occurs in the effective change cycle.

[0011] As a preferred embodiment of the antimony glycol reaction process uniformity control system described in this application, the non-uniformity criterion further includes a load fluctuation criterion; the deviation detection module further includes a third detection unit; the third detection unit is configured with a third detection strategy for detecting the load fluctuation criterion; the third detection strategy specifically includes: Set continuous judgment windows; each judgment window contains n consecutive detection cycles; n is a positive integer; calculate the average value and fluctuation range of the operating load in each judgment window; if the average value of the operating load in any judgment window is greater than the preset operating load threshold, or the fluctuation range of the operating load is greater than the preset load fluctuation threshold, then the antimony glycol reaction satisfies the load fluctuation criterion in the corresponding judgment window.

[0012] As a preferred embodiment of the antimony glycol reaction process uniformity control system described in this application, the non-uniform state includes restricted material mixing, excessively rapid local reaction, and solidification of the flow path. The state recognition module is configured with a state recognition strategy to identify the non-uniform state of the antimony glycol reaction. The state recognition strategy specifically includes: if there is at least one temperature monitoring point that meets the first deviation criterion and at least one temperature monitoring point that meets the second deviation criterion, and at the same time the antimony glycol reaction is detected to meet the volatilization hysteresis criterion and the load fluctuation criterion, then the non-uniform state of the antimony glycol reaction is that the material mixing is restricted. The state recognition strategy further includes: if at least one temperature monitoring point satisfies the first deviation criterion, and no antimony glycol reaction is detected that satisfies the volatilization hysteresis criterion and the load fluctuation criterion, then the non-uniform state of the antimony glycol reaction is a local reaction that is too fast. The state identification strategy further includes: if the non-uniform state is not identified as material mixing restriction, and there is at least one temperature monitoring point that meets the first deviation criterion or the second deviation criterion, and the antimony glycol reaction is detected to meet the load fluctuation criterion, then the operating load is determined to be periodic based on the time series of the operating load; if the operating load is periodic, then the non-uniform state of the antimony glycol reaction is the solidification of the flow path.

[0013] As a preferred embodiment of the antimony glycol reaction process uniformity control system described in this application, the reaction control module includes a control strategy unit and a control command unit; wherein, the control strategy unit is used to match a corresponding uniformity control strategy according to the non-uniform state of the antimony glycol reaction; the control command unit generates a stirring control command based on the matched uniformity control strategy and sends the stirring control command to the stirring actuator.

[0014] As a preferred embodiment of the antimony glycol reaction process uniformity control system described in this application, the adjustment strategy unit is configured with a uniformity adjustment strategy; the uniformity adjustment strategy includes a first adjustment strategy. If the non-uniform state of the antimony glycol reaction is due to restricted material mixing, then a first adjustment strategy is matched; the first adjustment strategy specifically includes: setting a first stirring parameter; the first stirring parameter includes a power boost coefficient, an enhancement duration, and an enhancement time interval; and periodically enhancing the stirring power based on the first stirring parameter, specifically including: increasing the stirring power to the product of the baseline stirring power and the power boost coefficient, and the duration of any stirring power enhancement is the enhancement duration, and the time interval between any two adjacent stirring power enhancements is the enhancement time interval.

[0015] As a preferred embodiment of the antimony glycol reaction process uniformity control system described in this application, the uniformity adjustment strategy further includes a second adjustment strategy; if the non-uniform state of the antimony glycol reaction is that the local reaction is too fast, then the second adjustment strategy is matched; the second adjustment strategy specifically includes: setting a second stirring parameter; the second stirring parameter includes a power limitation coefficient and a power limitation time; adjusting the stirring power based on the second stirring parameter specifically includes: adjusting the stirring power to the product of the reference stirring power and the power limitation coefficient, and the duration being the power limitation time.

[0016] As a preferred embodiment of the uniformity control system for the antimony glycol reaction process described in this application, the uniformity adjustment strategy further includes a third adjustment strategy; if the non-uniform state of the antimony glycol reaction is solidification of the flow path, then the third adjustment strategy is matched; the third adjustment strategy specifically includes: setting a third stirring parameter; the third stirring parameter includes a disturbance power, a disturbance triggering period, and a disturbance duration; adjusting the stirring power based on the third stirring parameter specifically includes: performing a disturbance adjustment on the stirring power once every disturbance triggering period, including adjusting the stirring power to the disturbance power; the duration of any disturbance adjustment is the disturbance duration.

[0017] Compared with the prior art, the beneficial effects achieved by this application are as follows: This application can identify non-uniform phenomena in the antimony glycol reaction process from multiple dimensions, such as reaction propulsion rate, volatilization mass transfer state, and material flow characteristics, thereby improving the accuracy and reliability of reaction state identification. Corresponding stirring and adjustment strategies are matched to different states, making the adjustment process more targeted and avoiding the problem that traditional fixed stirring methods are unable to improve different abnormal operating conditions.

[0018] By identifying non-uniform states during the reaction process and introducing corresponding stirring energy distribution adjustments, local reaction deviations within the system are suppressed during their development, thereby improving the overall consistency of the reaction stages. Targeted control of non-uniformity is achieved through dynamic adjustment of the stirring method, thus providing a more stable initial state for the subsequent crystallization process. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 A schematic diagram of a system for regulating the uniformity of the antimony glycol reaction process provided in this application; Figure 2The flowchart of the operation of a uniformity control system for the antimony glycol reaction process provided in this application. Detailed Implementation

[0020] The technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of this application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0021] This embodiment describes a system for controlling the uniformity of the antimony glycol reaction process, referring to... Figure 1 The system includes a reaction monitoring module, a data processing module, a deviation detection module, a state recognition module, and a reaction regulation module. like Figure 2 As shown, the system's operation flow is as follows: The reaction monitoring module collects reaction process data for the antimony glycol reaction; the reaction process data includes reaction temperature data, volatilization response data, and stirring load data; The reaction monitoring module includes a first acquisition unit, a second acquisition unit, and a third acquisition unit; wherein, the first acquisition unit is used to acquire reaction temperature data; the reaction temperature data includes the temperature value of each temperature monitoring point; The first acquisition unit includes multiple temperature monitoring points set inside the reactor; optionally, at least 6 to 10 temperature monitoring points are configured, which is sufficient to support the distribution of temperature monitoring points in different areas inside the reactor, so as to reflect the temperature difference at different locations inside the reaction system.

[0022] The second acquisition unit is used to acquire volatilization response data; the volatilization response data includes vacuum pressure value and ethylene glycol distillation amount; The second acquisition unit includes a vacuum pressure sensor configured on the vacuum main pipeline of the reactor for acquiring the vacuum pressure value on the gas phase side of the reaction system; the vacuum pressure sensor is preferably installed in a stable straight pipe section between the condenser outlet and the vacuum pump inlet; the second acquisition unit also includes a flow meter for the ethylene glycol recovery pipeline for acquiring the ethylene glycol distillation rate.

[0023] The third acquisition unit is used to acquire stirring load data; the stirring load data includes the operating load of the stirring motor; the operating load is any one of motor current, output power or torque; Operating load reflects changes in material flow resistance. Excessive operating load is related to factors such as localized viscosity increases, material accumulation, or solidification of the flow path.

[0024] The reaction monitoring module is configured with a continuous monitoring cycle; at the beginning of each monitoring cycle, the first acquisition unit, the second acquisition unit, and the third acquisition unit simultaneously acquire the corresponding reaction process data once.

[0025] Optionally, the length of the monitoring period can be set to 10 to 20 seconds, so as to reflect the changing trend of each reaction process data during the antimony glycol reaction, and avoid excessive interference of short-term noise with subsequent detection due to excessive sampling.

[0026] The data processing module constructs a reaction characteristic sequence based on the reaction process data; The data processing module includes a preprocessing unit and a sequence arrangement unit. The preprocessing unit is used to preprocess the reaction process data. Optionally, the preprocessing includes time alignment and outlier handling. Time alignment involves aligning the sampled values ​​of each reaction process data point in each monitoring cycle according to timestamps, ensuring that each monitoring cycle corresponds to a complete set of reaction process data. Outlier handling includes removing or correcting data that significantly exceeds the equipment's measurement range, contains null values, or exhibits abnormal abrupt changes between adjacent sampling points.

[0027] The sequence processing unit constructs a reaction feature sequence based on the reaction process data; the reaction feature sequence includes the time series of each reaction process data; for any reaction process data, the corresponding time series is constructed in the order of collection time from earliest to latest.

[0028] Specifically, the reaction characteristic sequence includes the time series of each of the following: vacuum pressure value, ethylene glycol distillation rate, and operating load; for the reaction temperature data, a time series of temperature values ​​is constructed for each temperature monitoring point.

[0029] The deviation detection module detects the non-uniformity criteria of the antimony glycol reaction based on the reaction characteristic sequence. The non-uniformity criteria include temperature deviation criteria, volatilization hysteresis criteria, and load fluctuation criteria; The deviation detection module includes a first detection unit, a second detection unit, and a third detection unit; wherein: the first detection unit is configured with a first detection strategy for detecting the temperature deviation criterion; the first detection strategy specifically includes: Calculate the temperature change rate of each temperature monitoring point in each monitoring cycle; for any monitoring cycle, calculate the temperature rate deviation of each temperature monitoring point; for any monitoring cycle, the temperature rate deviation of any temperature monitoring point is the difference between its temperature change rate and the mean of the temperature change rates of all temperature monitoring points. The temperature deviation criteria include a first deviation criterion and a second deviation criterion; if the temperature rate deviation of any temperature monitoring point in the most recent M monitoring cycles is greater than the corresponding first temperature deviation threshold, then the temperature monitoring point satisfies the first deviation criterion; M is a positive integer; if the temperature rate deviation of any temperature monitoring point in the most recent M monitoring cycles is less than the corresponding second temperature deviation threshold, then the temperature monitoring point satisfies the second deviation criterion.

[0030] In one optional implementation, M is set to 5, which balances detection sensitivity and accuracy. Further, for any monitoring cycle, the average temperature rate deviation of all temperature monitoring points is calculated and multiplied by 0.2 as the first temperature deviation threshold for that monitoring cycle. The first temperature deviation threshold is then multiplied by -1 to obtain the second temperature deviation threshold for that monitoring cycle. This means that if the temperature rate deviation of any temperature monitoring point consistently deviates from the average level by more than 20% over multiple consecutive monitoring cycles, then the temperature change rate at that point is significantly different from the overall level within the reactor. Specifically, if any temperature monitoring point meets the first deviation criterion, it indicates that the temperature change at that point is too rapid, and the reaction is progressing too quickly; if it meets the second deviation criterion, it indicates that the temperature change at that point is too slow, and the reaction is progressing too slowly.

[0031] The first detection strategy also includes calculating the temperature change rate of any temperature monitoring point in each monitoring cycle, specifically including: marking any monitoring cycle as the target cycle; extracting a target time window from the time series of temperature values ​​of the corresponding temperature monitoring point; the target time window includes the target cycle and N-1 consecutive monitoring cycles before the target cycle; N is a positive integer; calculating the ratio of the temperature value change in the target time window to the length of the target time window as the temperature change rate of the target cycle.

[0032] Optionally, N is set to 6. When the length of a single monitoring cycle is 10 to 20 seconds, the length of the target time window is 60 to 120 seconds, which can filter out single-point fluctuations and reflect the differences in the rate of temperature change. The temperature change within the target time window is the difference between the latest temperature value and the earliest temperature value in the monitoring cycle.

[0033] The second detection unit is configured with a second detection strategy for detecting the volatilization hysteresis criterion; the second detection strategy specifically includes: Calculate the pressure change and the volatile response change for each monitoring cycle. For any monitoring cycle, the pressure change is the difference between the vacuum pressure value of the current monitoring cycle and the vacuum pressure value of the adjacent previous monitoring cycle, and the volatile response change is the difference between the ethylene glycol distillation amount of the current monitoring cycle and the ethylene glycol distillation amount of the adjacent previous monitoring cycle. If the pressure change in any monitoring cycle is greater than the preset pressure change threshold, then the monitoring cycle is marked as a valid change cycle. Based on the change in the volatile response, it is determined whether an effective volatile response occurs in each effective change cycle; if no effective volatile response occurs in the most recent K consecutive effective change cycles, then the volatile hysteresis criterion is satisfied; K is a positive integer.

[0034] In one optional implementation, for any given monitoring cycle, 3% of the vacuum pressure value is set as the pressure change threshold for that monitoring cycle. This means that if the pressure change during that monitoring cycle is greater than 3% of the vacuum pressure value, it indicates a significant change in the vacuum pressure value, thus eliminating minor pressure fluctuations. Further optionally, K can be set to 2 or 3 to eliminate measurement errors.

[0035] The second detection strategy includes determining whether a valid volatile response occurs in any valid change period. Specifically, it includes: constructing a corresponding response observation window for any valid change period; the response observation window includes the corresponding valid change period and the subsequent m-1 consecutive monitoring periods; m is a positive integer; if the volatile response change amount of all monitoring periods in the corresponding response observation window is less than a preset response change threshold, then no valid volatile response occurs in the valid change period.

[0036] Those skilled in the art can set specific values ​​for the response change threshold based on actual needs. For example, from historical data records of qualified batches, data records with the same or similar temperature range and vacuum pressure values ​​as the current data can be selected. Effective change cycles can be identified in each selected data record, and corresponding response observation windows can be constructed. The maximum value of the volatile response change within multiple response observation windows can be extracted, and the average value can be calculated as a historical reference value for the volatile response change. A response change threshold of 0.7 to 0.8 times this historical reference value can be used. This means that, for the current reaction process, if no volatile response change greater than or equal to the response change threshold appears within the response observation window corresponding to any effective change cycle, it indicates that the response amplitude of ethylene glycol distillation with changes in vacuum pressure is significantly lower than the normal response amplitude in historical data, indicating that there are problems such as localized mass transfer limitation or insufficient material mixing within the reaction system. Further optionally, the value of m can range from 1 to 3, allowing the response observation window to cover the short time lag of conventional vacuum volatile response without weakening the timeliness of identifying volatile response anomalies due to excessive delay.

[0037] The third detection unit is configured with a third detection strategy for detecting the load fluctuation criterion; the third detection strategy specifically includes: Set continuous judgment windows; each judgment window contains n consecutive detection cycles; n is a positive integer; calculate the average value and fluctuation range of the operating load in each judgment window; if the average value of the operating load in any judgment window is greater than the preset operating load threshold, or the fluctuation range of the operating load is greater than the preset load fluctuation threshold, then the antimony glycol reaction satisfies the load fluctuation criterion in the corresponding judgment window.

[0038] In one optional implementation, the method for setting the operating load threshold and load fluctuation threshold includes: calculating the average operating load for each monitoring cycle after the start of the reaction, as a reference load; calculating the average fluctuation amplitude of the operating load for each judgment window after the start of the reaction, as a reference fluctuation amplitude; the operating load threshold can be set to 1.1 times the reference load, and the load fluctuation threshold can be set to 1.3 times the reference fluctuation amplitude. This means that when the average operating load is greater than the operating load threshold or the fluctuation amplitude is greater than the load fluctuation threshold, it indicates that the operating load or its fluctuation amplitude has significantly deviated from historical stable operating conditions, reflecting an abnormality in flow resistance. The value range of n can be set to 6-12, so that the judgment window can cover the short-cycle fluctuation characteristics of the stirring load, while avoiding misjudging single motor current fluctuations or instantaneous material impacts as increased load fluctuations.

[0039] In this embodiment, the temperature deviation criterion is used to determine whether the local reaction process has deviated, the volatilization hysteresis criterion is used to determine whether the deviation has resulted in limited mass transfer or volatilization response, and the load fluctuation criterion is used to determine whether there has been a change in material flow resistance. Different combinations of criteria can be used to identify and distinguish the non-uniform state of the antimony glycol reaction.

[0040] The state recognition module identifies the non-uniform state of the antimony glycol reaction based on the aforementioned non-uniformity criterion. The non-uniform state includes restricted material mixing, excessively rapid local reactions, and solidification of the flow path; The state recognition module is configured with a state recognition strategy to identify the non-uniform state of the antimony glycol reaction. The state recognition strategy specifically includes: if there is at least one temperature monitoring point that meets the first deviation criterion and at least one temperature monitoring point that meets the second deviation criterion, and at the same time the antimony glycol reaction is detected to meet the volatilization hysteresis criterion and the load fluctuation criterion, then the non-uniform state of the antimony glycol reaction is that the material mixing is restricted.

[0041] When the antimony glycol reaction is in a non-uniform state with limited material mixing, the propulsion rate of different regions in the reaction system has differentiated, changes in vacuum pressure have failed to bring about a normal volatilization response, and the stirring load shows increased flow resistance. This type of non-uniform state is not simply due to differences in heat input, but rather originates from local material enrichment, increased viscosity, or insufficient mixing.

[0042] The state recognition strategy further includes: if at least one temperature monitoring point satisfies the first deviation criterion, and no antimony glycol reaction is detected satisfying the volatilization hysteresis criterion and the load fluctuation criterion, then the non-uniform state of the antimony glycol reaction is a local reaction that is too fast.

[0043] The state identification strategy further includes: if the non-uniform state is not identified as material mixing restriction, and there is at least one temperature monitoring point that meets the first deviation criterion or the second deviation criterion, and the antimony glycol reaction is detected to meet the load fluctuation criterion, then the operating load is determined to be periodic based on the time series of the operating load; if the operating load is periodic, then the non-uniform state of the antimony glycol reaction is the solidification of the flow path.

[0044] When the antimony glycol reaction exhibits a non-uniform flow path solidification, this non-uniformity is not random but recurs within fixed regions or at fixed time rhythms. This indicates that stirring has created a relatively stable circulation path, with local areas maintaining either high or low flow rates for extended periods. In this case, simply increasing the stirring power may reinforce the existing flow path but is unlikely to eliminate dead zones or flow deviations.

[0045] In one optional implementation, the method for determining whether the operating load is periodic includes: marking the peak value of the operating load based on the corresponding time series; calculating the time difference between any two adjacent peak values ​​of the operating load as the corresponding fluctuation period; if the difference in the period length of any two fluctuation periods within the time period that satisfies the load fluctuation criterion is less than the period length of a monitoring period, then the operating load is periodic.

[0046] The reaction regulation module matches and executes the corresponding uniformity regulation strategy based on the non-uniform state.

[0047] The reaction regulation module includes a regulation strategy unit and a regulation command unit; wherein, the regulation strategy unit is used to match a corresponding homogeneity regulation strategy according to the non-uniform state of the antimony glycol reaction; the regulation command unit generates a stirring regulation command based on the matched homogeneity regulation strategy and sends the stirring regulation command to the stirring actuator.

[0048] The stirring actuator can be configured as a motor-driven stirring device installed on the reactor, including at least a stirring motor, a frequency converter or servo driver, a stirring shaft, and a stirring paddle. The stirring actuator intervenes in the stirring of materials within the reactor based on stirring adjustment commands. For example, the frequency converter or servo driver adjusts the speed, output power, running time, or stirring direction of the stirring motor according to the stirring adjustment commands, thereby driving the stirring shaft and stirring paddle to perform corresponding stirring operations. This transforms the stirring process from a fixed speed or fixed power operation to a dynamically adjusted operation mode that changes with the reaction state, thereby altering the mixing intensity and flow velocity distribution of materials within the reaction system. This suppresses localized material enrichment, flow stagnation, or differences in reaction propulsion, improving the uniformity and stability of the reaction process.

[0049] The adjustment strategy unit is configured with a uniformity adjustment strategy; the uniformity adjustment strategy includes a first adjustment strategy, a second adjustment strategy, and a third adjustment strategy; If the non-uniform state of the antimony glycol reaction is due to restricted material mixing, then a first adjustment strategy is matched; the first adjustment strategy specifically includes: setting a first stirring parameter; the first stirring parameter includes a power boost coefficient, an enhancement duration, and an enhancement time interval; and periodically enhancing the stirring power based on the first stirring parameter, specifically including: increasing the stirring power to the product of the baseline stirring power and the power boost coefficient, and the duration of any stirring power enhancement is the enhancement duration, and the time interval between any two adjacent stirring power enhancements is the enhancement time interval.

[0050] When a non-uniform state indicates limited material mixing, it suggests localized material enrichment, increased viscosity, or insufficient mixing. In such cases, it is necessary to enhance local mixing capacity and break up areas of material enrichment. This embodiment employs a short-duration enhanced stirring method, concentrating stirring energy input within a short period to disrupt local boundary layers or stagnant regions. The reference stirring power is a conventional stirring power preset by those skilled in the art in practice. In an optional implementation, the power enhancement factor is set to 1.25, allowing the stirring action to provide a significant short-duration mixing enhancement effect; the enhancement duration is set to 60 seconds, and the enhancement interval is set to 180 seconds to prevent excessively short or long high-power stirring times from hindering effective mixing or causing continuous high-power stirring to negatively impact the reaction rate.

[0051] If the non-uniform state of the antimony glycol reaction is due to localized excessively rapid reaction, then a second adjustment strategy is applied. The second adjustment strategy specifically includes: setting a second stirring parameter; the second stirring parameter includes a power limitation coefficient and a power limitation time; adjusting the stirring power based on the second stirring parameter, specifically including: adjusting the stirring power to the product of the baseline stirring power and the power limitation coefficient, and the duration being the power limitation time.

[0052] When a non-uniform state is characterized by excessively rapid local reactions, it indicates that the reaction propagation rate in some areas is higher than the overall level. This state is related to local heat transfer, shear forces, or sensitivity to reaction conditions, rather than being caused by insufficient overall mixing. This embodiment addresses and mitigates localized propagation differences by limiting the stirring power. In an optional implementation, the power limitation factor is set to 0.7 to ensure the minimum stirring power required to maintain basic material circulation; the power limitation time is set to 300 seconds to mitigate excessively rapid local propagation and provide a stable observation period for continuous observation and updating of the reaction state.

[0053] If the non-uniform state of the antimony glycol reaction is solidification of the flow path, then a third adjustment strategy is matched; the third adjustment strategy specifically includes: setting a third stirring parameter; the third stirring parameter includes disturbance power, disturbance triggering period, and disturbance duration; adjusting the stirring power based on the third stirring parameter, specifically including: every disturbance triggering period, performing a disturbance adjustment on the stirring power, including adjusting the stirring power to the disturbance power; the duration of any disturbance adjustment is the disturbance duration.

[0054] When a non-uniform state is characterized by a solidified flow path, it indicates the formation of a relatively fixed circulation path or local dead zone within the reaction system. This embodiment disrupts the fluid circulation path by briefly altering the stirring operation mode, breaking the original stable flow field and prompting material redistribution. In one optional implementation, the disturbance power includes a first disturbance power and a second disturbance power, where the first disturbance power is set to 0.8 times the reference stirring power, and the second disturbance power is set to 1.2 times the reference stirring power. In one disturbance adjustment, the stirring power is gradually increased from the first disturbance power to the second disturbance power, and then gradually decreased back to the first disturbance power, repeated several times. In another implementation, the stirring actuator is reversed in the disturbance adjustment direction, and the disturbance power is 0.6 times the reference stirring power; for example, if the normal stirring direction is clockwise, counterclockwise stirring is performed during the disturbance adjustment. The disturbance trigger cycle is set to 600 seconds, and the disturbance duration is set to 30 seconds, used to change the original flow field direction or velocity distribution and avoid continuous impact on the normal reaction.

[0055] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of protection of this application, and these forms are all within the protection scope of this application.

Claims

1. A system for regulating the uniformity of the antimony glycol reaction process, characterized in that: It includes a reaction monitoring module, a data processing module, a deviation detection module, a state recognition module, and a reaction regulation module; among which: The reaction monitoring module is used to collect reaction process data of the antimony glycol reaction; the reaction process data includes reaction temperature data, volatilization response data, and stirring load data; The reaction monitoring module includes a first acquisition unit; the first acquisition unit includes multiple temperature monitoring points set inside the reaction vessel for acquiring reaction temperature data; the reaction temperature data includes the temperature value of each temperature monitoring point. The volatile response data includes the vacuum pressure value and the amount of ethylene glycol distilled out; the stirring load data includes the operating load of the stirring motor; The data processing module constructs a reaction feature sequence based on the reaction process data; the reaction feature sequence includes a time series of each reaction process data. The deviation detection module detects the non-uniformity criteria of the antimony glycol reaction based on the reaction characteristic sequence. The non-uniformity criterion includes a temperature deviation criterion; the deviation detection module includes a first detection unit; the first detection unit is configured with a first detection strategy for detecting the temperature deviation criterion; the first detection strategy specifically includes: Calculate the temperature change rate of each temperature monitoring point in each monitoring cycle; for any monitoring cycle, calculate the temperature rate deviation of each temperature monitoring point; for any monitoring cycle, the temperature rate deviation of any temperature monitoring point is the difference between its temperature change rate and the mean of the temperature change rates of all temperature monitoring points. The temperature deviation criteria include a first deviation criterion and a second deviation criterion; if the temperature rate deviation of any temperature monitoring point in the most recent M monitoring cycles is greater than the corresponding first temperature deviation threshold, then the temperature monitoring point satisfies the first deviation criterion; M is a positive integer; if the temperature rate deviation of any temperature monitoring point in the most recent M monitoring cycles is less than the corresponding second temperature deviation threshold, then the temperature monitoring point satisfies the second deviation criterion. The state recognition module identifies the non-uniform state of the antimony glycol reaction based on the aforementioned non-uniformity criterion. The reaction regulation module matches the non-uniform state and executes the corresponding uniformity regulation strategy; The non-uniformity criterion also includes the volatilization hysteresis criterion and the load fluctuation criterion; The deviation detection module further includes a second detection unit; the second detection unit is configured with a second detection strategy for detecting the evaporation hysteresis criterion; the second detection strategy specifically includes: Calculate the pressure change and the volatile response change for each monitoring cycle. For any monitoring cycle, the pressure change is the difference between the vacuum pressure value of the current monitoring cycle and the vacuum pressure value of the adjacent previous monitoring cycle, and the volatile response change is the difference between the ethylene glycol distillation amount of the current monitoring cycle and the ethylene glycol distillation amount of the adjacent previous monitoring cycle. If the pressure change in any monitoring cycle is greater than the preset pressure change threshold, then the monitoring cycle is marked as a valid change cycle. Based on the change in the volatile response, it is determined whether an effective volatile response occurs in each effective change cycle; if no effective volatile response occurs in the most recent K consecutive effective change cycles, then the volatile hysteresis criterion is satisfied; K is a positive integer; The second detection strategy includes determining whether an effective volatile response occurs in any valid change cycle. Specifically, it includes: constructing a corresponding response observation window for any valid change cycle; the response observation window includes the corresponding valid change cycle and the subsequent m-1 consecutive monitoring cycles; m is a positive integer; if the volatile response change in all monitoring cycles within the corresponding response observation window is less than a preset response change threshold, then no effective volatile response occurs in the valid change cycle. The deviation detection module further includes a third detection unit; the third detection unit is configured with a third detection strategy for detecting the load fluctuation criterion; the third detection strategy specifically includes: Set continuous judgment windows; each judgment window contains n consecutive detection cycles; n is a positive integer; calculate the average value and fluctuation range of the operating load in each judgment window; if the average value of the operating load in any judgment window is greater than the preset operating load threshold, or the fluctuation range of the operating load is greater than the preset load fluctuation threshold, then the antimony glycol reaction satisfies the load fluctuation criterion in the corresponding judgment window. The non-uniform state includes restricted material mixing; The state recognition module is configured with a state recognition strategy to identify the non-uniform state of the antimony glycol reaction. The state recognition strategy specifically includes: if there is at least one temperature monitoring point that meets the first deviation criterion and at least one temperature monitoring point that meets the second deviation criterion, and at the same time the antimony glycol reaction is detected to meet the volatilization hysteresis criterion and the load fluctuation criterion, then the non-uniform state of the antimony glycol reaction is that the material mixing is restricted.

2. The uniformity control system for the antimony glycol reaction process as described in claim 1, characterized in that: The reaction monitoring module is configured with a continuous monitoring cycle; at the beginning of each monitoring cycle, the corresponding reaction process data is collected synchronously once.

3. The uniformity control system for the antimony glycol reaction process as described in claim 2, characterized in that: The first detection strategy also includes calculating the temperature change rate of any temperature monitoring point in each monitoring cycle, specifically including: marking any monitoring cycle as the target cycle; extracting a target time window from the time series of temperature values ​​of the corresponding temperature monitoring point; the target time window includes the target cycle and N-1 consecutive monitoring cycles before the target cycle; N is a positive integer; calculating the ratio of the temperature value change in the target time window to the length of the target time window as the temperature change rate of the target cycle.

4. The uniformity control system for the antimony glycol reaction process as described in claim 3, characterized in that: The non-uniform state also includes localized excessively rapid reactions and solidification of the flow path; The state recognition strategy further includes: if at least one temperature monitoring point satisfies the first deviation criterion, and no antimony glycol reaction is detected that satisfies the volatilization hysteresis criterion and the load fluctuation criterion, then the non-uniform state of the antimony glycol reaction is a local reaction that is too fast. The state identification strategy further includes: if the non-uniform state is not identified as material mixing restriction, and there is at least one temperature monitoring point that meets the first deviation criterion or the second deviation criterion, and the antimony glycol reaction is detected to meet the load fluctuation criterion, then the operating load is determined to be periodic based on the time series of the operating load; if the operating load is periodic, then the non-uniform state of the antimony glycol reaction is the solidification of the flow path.

5. The uniformity control system for the antimony glycol reaction process as described in claim 4, characterized in that: The reaction regulation module includes a regulation strategy unit and a regulation command unit; wherein, the regulation strategy unit is used to match a corresponding homogeneity regulation strategy according to the non-uniform state of the antimony glycol reaction; the regulation command unit generates a stirring regulation command based on the matched homogeneity regulation strategy and sends the stirring regulation command to the stirring actuator.

6. The uniformity control system for the antimony glycol reaction process as described in claim 5, characterized in that: The adjustment strategy unit is configured with a uniformity adjustment strategy; the uniformity adjustment strategy includes a first adjustment strategy. If the non-uniform state of the antimony glycol reaction is due to restricted material mixing, then the first adjustment strategy should be matched; The first adjustment strategy specifically includes: setting a first stirring parameter; the first stirring parameter includes a power boost coefficient, an enhancement duration, and an enhancement time interval; periodically enhancing the stirring power based on the first stirring parameter, specifically including: increasing the stirring power to the product of a baseline stirring power and a power boost coefficient, and the duration of any stirring power boost is the enhancement duration, and the time interval between any two adjacent stirring power boosts is the enhancement time interval.

7. The uniformity control system for the antimony glycol reaction process as described in claim 6, characterized in that: The uniformity adjustment strategy also includes a second adjustment strategy; if the non-uniform state of the antimony glycol reaction is that the local reaction is too fast, then the second adjustment strategy is matched; the second adjustment strategy specifically includes: setting a second stirring parameter; the second stirring parameter includes a power limit coefficient and a power limit time; adjusting the stirring power based on the second stirring parameter specifically includes: adjusting the stirring power to the product of the reference stirring power and the power limit coefficient, and the duration being the power limit time.

8. The uniformity control system for the antimony glycol reaction process as described in claim 7, characterized in that: The uniformity adjustment strategy also includes a third adjustment strategy; if the non-uniform state of the antimony glycol reaction is solidification of the flow path, then the third adjustment strategy is matched; the third adjustment strategy specifically includes: setting a third stirring parameter; the third stirring parameter includes disturbance power, disturbance triggering period and disturbance duration; adjusting the stirring power based on the third stirring parameter, specifically including: every disturbance triggering period, performing a disturbance adjustment on the stirring power, including adjusting the stirring power to the disturbance power; the duration of any disturbance adjustment is the disturbance duration.

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