Temperature-pressure interlocking control reaction kettle device and dihydrochloric acid synthesis process

Abstract

The invention relates to the technical field of dihydrochloric acid synthesis, in particular to a temperature-pressure interlocking control reaction kettle device and a dihydrochloric acid synthesis process. The method comprises the following steps: determining reaction characteristic degrees of a monitoring period in an oxidation stage, a condensation stage and a purification stage respectively based on a fluctuation correlation degree and a fluctuation synchronization degree of a reaction heat release rate and a chlorine flow value in the monitoring period in a historical dihydrochloric acid synthesis period and a correlation degree of a temperature value in a kettle respectively with the reaction heat release rate and the chlorine flow value; determining a reaction stage to which the monitoring period belongs based on continuity of a dihydrochloric acid synthesis process sequence and state matching of reaction characteristic degrees; dividing the monitoring periods of the same type of reaction stages into historical clusters; and determining a risk alarm coefficient based on alarm information in a preset future window in a monitoring period in a historical cluster matched with the current period and the reaction stage to which the current period belongs. According to the invention, a safety control mode is converted from a passive mode to an active mode, and the hysteresis of a complex multi-stage reaction process is solved.

Description

Technical Field

[0001] This invention relates to the field of dihydrochloric acid synthesis technology, specifically to a temperature-pressure interlocked control reactor device and a dihydrochloric acid synthesis process. Background Technology

[0002] Reactors are core equipment in chemical production, widely used in various chemical reactions, synthesis, and polymerization processes. Precise control of their internal temperature and pressure plays a decisive role in the reaction process, product yield, and quality. The synthesis of dihydrochlorides often involves complex, highly exothermic, multiphase reactions, resulting in a highly coupled and dynamically sensitive temperature and pressure dynamic within the reaction system, directly affecting the reaction rate and product quality. Therefore, in large-scale continuous production, ensuring that the temperature and pressure within the reactor fluctuate within a safe and stable range is crucial for guaranteeing inherent process safety and improving production efficiency.

[0003] Traditional temperature-pressure safety interlock control of reactors largely relies on mechanical interlock systems with static threshold values ​​for a single parameter. The core logic is to monitor the temperature and pressure within the reactor in real time; if either parameter exceeds the safety limit, the system triggers emergency interlock actions (such as cutting off the feed or emergency cooling) to prevent dangers caused by exothermic runaway reactions or side reactions. However, since temperature and pressure are parameters resulting from energy accumulation, reaching the alarm threshold means the reaction system has accumulated a large amount of energy or pressure potential, potentially missing the optimal intervention time and leading to control lag. Furthermore, the synthesis of dihydrochloride involves a complex process with multiple distinct stages, including oxidation, condensation, and purification. Fixed thresholds struggle to account for the characteristics of each stage, easily resulting in false alarms during high-activity periods or missed alarms during stable periods. Therefore, existing interlock control methods based on fixed thresholds are essentially passive response mechanisms. Due to their monitoring lag and singular judgment, they cannot provide accurate and timely early warnings of dynamically changing reaction risks. Summary of the Invention

[0004] To address the technical problem that existing interlocking control methods based on fixed thresholds, with their static and singular judgment logic, cannot handle complex processes with multi-stage dynamic changes, resulting in severely delayed and inaccurate early warnings, the present invention aims to provide a temperature-pressure interlocking control reactor device and a dihydrochloric acid synthesis process. The specific technical solution adopted is as follows: In a first aspect, one embodiment of the present invention provides a temperature-pressure interlock controlled process for the synthesis of dihydrochloric acid, the process comprising: The reactor was equipped with temperature, chlorine flow rate, and pressure values ​​at each moment during the historical dihydrochloric acid synthesis period. The reaction exothermic rate at each moment is determined based on the internal heat accumulation and external heat loss of the reactor at each moment. The historical dihydrochloric acid synthesis period was divided into different monitoring periods. Based on the correlation and synchronization of the reaction exothermic rate and chlorine flow rate at each moment within the monitoring period, the correlation between the in-vessel temperature and the reaction exothermic rate and chlorine flow rate, and the magnitude of the reaction exothermic rate, the reaction characteristic of the monitoring period in the oxidation, condensation and purification stages was determined. Based on the continuity of the dihydrochloric acid synthesis process sequence and the state matching of reaction characteristics, the reaction stage to which each monitoring cycle belongs is determined; based on the changes in reaction exothermic rate and pressure value inside the reactor, the monitoring cycles of the same type of reaction stage are divided into different historical clusters. Based on the alarm information within a preset future window of the historical cluster monitoring cycle that matches the current cycle and its corresponding reaction stage during the current dihydrochloric acid synthesis period, the risk alarm coefficient for the current cycle is determined.

[0005] Furthermore, determining the rate of heat release at each moment includes: The material density, specific heat capacity, and volume of the material in the reactor at each moment during the historical dihydrochloric acid synthesis period were obtained, as well as the heat transfer coefficient and heat transfer area of ​​the reactor and the jacket temperature value at each moment. The temperature inside the vessel includes the core temperature inside the vessel; the ratio of the difference between the core temperature inside the vessel at each moment and the adjacent previous moment to the time interval between the two moments is taken as the temperature change rate at each moment; the product of the material density, specific heat capacity, and volume at the same moment with the temperature change rate is taken as the material heat storage rate at each moment. Calculate the difference between the core temperature and the jacket temperature at each moment, and use the product of the difference, the heat transfer coefficient and the heat transfer area as the jacket heat transfer rate at each moment. The sum of the material heat storage rate and the jacket heat transfer rate is taken as the reaction exothermic rate at each moment.

[0006] Furthermore, determining the reaction characteristic of the monitoring period in the oxidation, condensation, and purification stages includes: Based on the correlation and synchronization between the reaction exothermic rate and the chlorine flow rate at each moment within the monitoring period, the reaction characteristic of the monitoring period in the oxidation stage is determined. The internal temperature value includes the internal reference temperature value; based on the internal reference temperature value at each moment within the monitoring period, the correlation between the exothermic rate and the chlorine flow rate is reflected, and the reaction characteristic of the monitoring period in the condensation stage is determined. Based on the reaction exothermic rate and the reference temperature inside the vessel during the monitoring period, the reaction characteristic of the monitoring period in the purification stage is determined.

[0007] Furthermore, determining the reaction characteristic of the monitoring cycle during the oxidation phase includes: Obtain the correlation coefficient between the chlorine flow rate and the reaction exothermic rate at all times within each monitoring cycle, and denot it as the chlorine exothermic correlation coefficient. The extreme points of chlorine flow rate and reaction exothermic rate at all times in each monitoring cycle are determined respectively, and the extreme points corresponding to chlorine flow rate and reaction exothermic rate are recorded as chlorine fluctuation time and exothermic fluctuation time respectively. The time interval between each chlorine fluctuation moment and all exothermic fluctuation moments following that moment is obtained within each monitoring cycle. The minimum time interval is selected as the asynchronous interval for each chlorine fluctuation moment. The average of the asynchronous intervals for all chlorine fluctuation moments within each monitoring cycle is used as the asynchronous index. Based on the correlation between the asynchrony index and the exothermic reaction of chlorine, the reaction characteristic degree of each monitoring cycle in the oxidation stage is obtained.

[0008] Furthermore, determining the response characteristic of the monitoring cycle during the condensation phase includes: Obtain the correlation coefficient between the reference temperature value inside the vessel and the reaction exothermic rate at all times within each monitoring cycle, and denot it as the temperature exothermic correlation. The absolute value of the correlation coefficient between the reference temperature value inside the vessel and the chlorine flow rate value at all times within each monitoring cycle is obtained and denoted as the temperature-chlorine correlation coefficient. A negative correlation mapping is performed on the temperature-chlorine correlation of each monitoring cycle. The product of the mapping result and the normalized result of the temperature-exothermic correlation is used as the reaction characteristic of each monitoring cycle in the condensation stage.

[0009] Furthermore, determining the reaction characteristic of the monitoring cycle during the purification phase includes: The maximum value between the reaction exothermic rate and the zero value at each moment is selected and recorded as the adjusted exothermic rate at the corresponding moment; the sum of the adjusted exothermic rates at all moments in each monitoring cycle is taken as the overall exothermic rate. The overall temperature value is obtained by averaging the reference temperature values ​​inside the vessel at all times within each monitoring cycle. The product of the overall exothermic rate and the overall temperature value is negatively correlated and normalized to obtain the reaction characteristic of the purification stage.

[0010] Furthermore, determining the reaction stage to which each monitoring cycle belongs includes: The synthesis process of dihydrochloric acid includes reaction stages in the following order: oxidation stage, condensation stage and purification stage. The reaction stage of the first monitoring cycle in the historical dihydrochloric acid synthesis process is set as the oxidation stage; the second monitoring cycle is used as the initial analysis cycle. It is determined whether there is a reaction stage after the reaction stage of the adjacent previous monitoring cycle. If so, the reaction stage of the adjacent previous monitoring cycle and its adjacent next reaction stage are recorded as the suspected stages of the analysis cycle. The suspected stage corresponding to the maximum value of the reaction characteristic of the two suspected stages is selected as the reaction stage of the analysis cycle; if not, the reaction stage of the analysis cycle is set as the purification stage.

[0011] Furthermore, the division of monitoring cycles for the same type of reaction phase into different historical clusters includes: The ratio of the pressure difference between the pressure values ​​inside the vessel at each time point and the pressure difference between the two preceding time points is taken as the pressure change rate at each time point. The feature vector is composed of the average reaction heat release rate and the average pressure change rate at all times within each monitoring cycle; Based on the distance between feature vectors of different monitoring periods, the monitoring periods of the same type of reaction stage are clustered to obtain the historical clusters of each type of reaction stage.

[0012] Furthermore, determining the risk alarm coefficient for the current period includes: Obtain alarm information and its handling measures within a preset future window for each monitoring cycle during the historical dihydrochloric acid process; The processing measures for alarm information within the preset future window of all monitoring periods within the same historical cluster are constituted, forming a set of processing measures for each historical cluster. The monitoring period with alarm information within the preset future window is recorded as the critical period, and the ratio of the number of critical periods in each historical cluster to the total number of monitoring periods is used as the historical alarm coefficient. Determine the reaction stage to which the current cycle belongs; calculate the Euclidean distance between the feature vector of the current cycle and the centroids of all historical clusters in the reaction stage to which the current cycle belongs; select the historical alarm coefficients and treatment measures set corresponding to the historical clusters with the smallest Euclidean distance, and use them as the reference set of risk alarm coefficients and treatment measures for the current cycle.

[0013] Secondly, another embodiment of the present invention provides a temperature-pressure interlock controlled reactor apparatus, the apparatus including a processor, which executes the steps of a temperature-pressure interlock controlled dihydrochloric acid synthesis process as described above.

[0014] The present invention has the following beneficial effects: Firstly, this solution changes the warning target from the state parameters of the reaction result (such as temperature and pressure) to the most fundamental and sensitive characteristics of the process dynamics: the reaction exothermic rate and the change in the pressure value inside the vessel. It can reveal abnormal trends in the reaction state in advance before the state parameters become abnormal, thus solving the problem of slow response due to the lag in perception of traditional methods.

[0015] Secondly, traditional interlocking control methods based on fixed thresholds cannot adapt to the differences in thermal behavior at different stages such as oxidation, condensation, and purification. This solution analyzes the dynamic correlation between multiple parameters, including reaction exothermic rate, chlorine flow rate, and reactor temperature, to achieve flexible and accurate stage boundary identification. This provides an accurate basis for subsequent safety warnings based on stage characteristics, ensuring that the warning situation dynamically matches the current process characteristics and solving the problem of poor adaptability of existing methods in complex multi-stage processes.

[0016] Thirdly, by clustering monitoring cycles of the same reaction stage into different historical clusters, multiple dynamic patterns for each reaction stage are identified, rather than a single fixed threshold. By analyzing the future alarm situations of historical clusters matching the current cycle's stage, it is possible to predict the likelihood of anomalies in the current cycle in the near future based on similar process patterns, thus obtaining a risk alarm coefficient. This drives the safety control mode to upgrade from a passive "perception-threshold-response" to a proactive "pattern identification-risk prediction," significantly improving the safety and controllability of complex multi-stage reaction processes. Attached Figure Description

[0017] To more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The flowchart illustrates a temperature-pressure interlock controlled process for synthesizing dihydrochloric acid according to an embodiment of the present invention. Figure 2 This is a flowchart of a method for obtaining reaction characteristics according to an embodiment of the present invention. Detailed Implementation

[0019] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a temperature-pressure interlocked control reactor apparatus and a dihydrochloric acid synthesis process according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] The following description, in conjunction with the accompanying drawings, details the specific scheme of the temperature-pressure interlock control reactor device and the dihydrochloric acid synthesis process provided by the present invention.

[0022] Example 1: This invention proposes a temperature-pressure interlock controlled process for the synthesis of dihydrochloric acid. Please refer to [link / reference]. Figure 1 The diagram illustrates a flow chart of a temperature-pressure interlock controlled dihydrochloric acid synthesis process according to an embodiment of the present invention, the process comprising: Step S1: Obtain the temperature, chlorine flow rate, and pressure inside the reactor at each moment during the historical dihydrochloric acid synthesis period.

[0023] Temperature sensors are installed at at least three key locations inside the reactor: the inlet pipe and the outlet pipe of the jacket, to monitor the temperature inside the reactor and the temperature of the jacket, respectively. A pressure transmitter is installed at the top of the reactor to monitor the pressure inside the reactor. A mass flow meter is installed on the chlorine feed line to monitor the chlorine flow rate.

[0024] The synthesis of dihydrochloric acid is a multi-step organic synthesis process using chlorine as a raw material or chlorinating agent. It is typically divided into four stages: feeding, oxidation, condensation, purification, and discharging. Specifically, the raw material for producing dihydrochloric acid is added to the reactor. The raw material participates extensively in the oxidation reaction. After the main reactant, chlorine, is consumed or conditions change, a subsequent condensation reaction occurs. Once all chemical reactions are complete, a physical separation and purification step is performed, and the product is then removed from the reactor. During the synthesis of dihydrochloric acid in the reactor, different stages exhibit different reaction mechanisms and thermodynamic characteristics. The goal of this scheme is early warning and proactive intervention in the reaction process. The three key stages—oxidation, condensation, and purification—cover the entire chemical change process from reaction initiation, vigorous progress, and mild progression to reaction termination, representing the periods with the highest safety risks and the greatest need for intelligent monitoring. The safety risks in the feeding and discharging stages mainly stem from mechanical operation and program logic, rather than uncontrollable exothermic chemical reactions, and therefore are not within the core scope of dynamic trend analysis.

[0025] In historically successful dihydrochloric acid synthesis processes where alarms were successfully handled, the time period from the start of the reaction after the raw material feed was completed to the moment the product was removed from the reactor is defined as the historical dihydrochloric acid synthesis period. This period includes the oxidation, condensation, and purification stages. During each moment within this historical dihydrochloric acid synthesis period, all sensors inside the reactor simultaneously collected temperature, pressure, and chlorine flow rate values. The temperature value collected by the temperature sensor at the center of the reactor is recorded as the core temperature value. The average temperature value collected by all temperature sensors at each moment is recorded as the reference temperature value. The average temperature value collected by the temperature sensors at the inlet and outlet pipes of the jacket is recorded as the jacket temperature value. The core temperature value and the reference temperature value are collectively referred to as the reactor internal temperature value.

[0026] In one implementation of this invention, the data acquisition frequency of all types of sensors is the same, set to 1 Hz, and the implementer can adjust it according to the specific circumstances.

[0027] Step S2: Based on the internal heat accumulation and external heat loss of the reactor at each moment, obtain the reaction exothermic rate at each moment.

[0028] Traditional fixed threshold methods cannot detect multi-stage dynamic changes in the process, leading to delayed early warnings. This step transforms the early warning logic from passively judging the state outcome (pressure or temperature) to actively analyzing the process cause (dynamic heat balance). By analyzing the internal heat accumulation and external heat loss from the chemical energy conversion of the reaction within the reactor, the reaction exothermic rate of the materials in the reactor at each moment is analyzed. The reaction exothermic rate is the most fundamental and sensitive characterization of process dynamics, revealing abnormal trends in reaction activity or cooling state before significant temperature changes occur. This fundamentally solves the problem of poor adaptability and slow response of traditional fixed threshold-based interlocking systems in complex multi-stage processes.

[0029] Step S3: Divide the historical dihydrochloric acid synthesis period into different monitoring cycles; based on the correlation and synchronization of the reaction exothermic rate and chlorine flow rate at each moment within the monitoring cycle, the correlation between the in-vessel temperature and the reaction exothermic rate and chlorine flow rate, and the magnitude of the reaction exothermic rate, determine the reaction characteristic of the monitoring cycle in the oxidation, condensation, and purification stages.

[0030] The historical dihydrochloric acid synthesis period is divided into different monitoring cycles to construct a basic time unit that can be used for dynamic process analysis and state comparison. In one implementation of this invention, the historical dihydrochloric acid synthesis period is evenly divided into different monitoring cycles, with each monitoring cycle lasting 1 minute. The implementer can set this according to specific circumstances.

[0031] In the oxidation stage of dihydrochloride synthesis, chlorine is the key reactant. According to chemical reaction kinetics, the rate of exothermic reaction is mainly controlled by the chlorine supply rate; that is, changes in chlorine flow rate should directly and immediately affect the rate of exothermic reaction. Therefore, the essential characteristic of the oxidation stage is the high correlation and high synchronicity between the rate of exothermic reaction and the chlorine flow rate.

[0032] During the condensation stage, the initial oxidation or chlorination reaction is essentially complete. The reaction pathway shifts from the initial consumption of substrate chlorine to processes such as intramolecular or intermolecular condensation and cyclization of intermediates. Chlorine is no longer a key reactant in this stage, and its flow rate change significantly reduces its direct impact on the exothermic reaction. At this point, the condensation reaction itself releases its inherent heat of reaction, which is the core internal heat source maintaining and driving the temperature evolution within the reactor. Therefore, the essential characteristic of the condensation stage is a high correlation between temperature and the rate of exothermic reaction, but a low correlation between temperature and chlorine flow rate.

[0033] The core task of the purification stage is to achieve the final separation, crystallization, or removal of residual impurities of the product, rather than continuing vigorous synthetic reactions. The process requires actively lowering the temperature to promote product precipitation, suppress side reactions, and stabilize the product morphology. At this point, the main oxidation and condensation reactions from the earlier stages have essentially ended, and there is no longer any sustained and significant exothermic reaction within the system, causing the exothermic reaction rate to approach zero. Therefore, the essential characteristic of the purification stage is a low temperature and an exothermic reaction rate approaching zero.

[0034] Therefore, based on the correlation and synchronization between the reaction exothermic rate and the chlorine flow rate at each moment within the monitoring period, the correlation between the in-vessel temperature and the reaction exothermic rate and the chlorine flow rate, and the magnitude of the reaction exothermic rate, the reaction characteristic of the monitoring period in the oxidation, condensation, and purification stages is determined.

[0035] Step S4: Based on the continuity of the dihydrochloric acid synthesis process sequence and the state matching of the reaction characteristics, determine the reaction stage to which each monitoring cycle belongs; based on the reaction exothermic rate and the change in the pressure value inside the reactor, divide the monitoring cycles of the same type of reaction stage into different historical clusters.

[0036] The continuity of the process sequence (i.e., the oxidation, condensation, and purification stages occur sequentially) provides a basic theoretical framework and temporal constraints for stage determination, preventing logical reversals or jumps in stage identification. The state matching of reaction characteristic degrees presents the degree of matching between the reaction characteristics of the monitoring period and the ideal characteristics of each reaction stage, using real-time data to dynamically calibrate the correspondence between the actual reaction process and the theoretical stages. Combining the above two aspects ensures that stage identification follows the basic laws of chemical engineering while achieving flexible and accurate stage boundary identification, thus providing an accurate and reliable basis for subsequent safety early warning and optimized control based on stage characteristics.

[0037] Since the synthesis of dihydrochloric acid is a typical highly exothermic reaction process often accompanied by gas production, its core safety risks are directly reflected in heat release and pressure accumulation. Side reaction migration, decomposition, or runaway reaction can lead to a rapid increase in pressure inside the reactor. Pressure changes can sensitively reflect the generation of abnormal gases, and the rate of heat release is directly related to the reaction progress. Combining these two factors can most directly characterize the safety status and energy dynamics of the reaction process. Clustering can achieve the most representative and timely pattern recognition of the reaction safety status.

[0038] Step S5: Based on the alarm information within a preset future window of the historical cluster monitoring cycle that matches the current cycle and its corresponding reaction stage during the current dihydrochloric acid synthesis period, determine the risk alarm coefficient for the current cycle.

[0039] By analyzing the matching between the current cycle and historical clusters of the same period, and based on the alarm information of the corresponding process mode within a preset time window, the risk alarm coefficient for future alarms in the current cycle is quantified. This overcomes the lag limitation of traditional interlocking control relying on instantaneous threshold responses, and promotes the upgrade of safety control mode from passive "perception-threshold-response" to proactive "pattern identification-risk prediction." This provides crucial decision-making basis for implementing preventative interventions, significantly improving the safety and controllability of complex multi-stage reaction processes.

[0040] In one implementation of this invention, the two minutes immediately following the end of the monitoring period are used as a preset future window for the monitoring period. The implementer can set the duration of the preset future window according to the specific circumstances.

[0041] Preferably, in some possible implementations of the embodiments of the present invention, the method for obtaining the reaction exothermic rate includes: obtaining the material density, specific heat capacity, and volume of the material in the reactor at each moment during the historical dihydrochloric acid synthesis period, the heat transfer coefficient and heat transfer area of ​​the reactor, and the jacket temperature value at each moment; the reactor temperature value includes the reactor core temperature value; the ratio of the difference between the reactor core temperature value at each moment and the previous moment to the time interval between the two moments is taken as the temperature change rate at each moment; the product of the material density, specific heat capacity, and volume at the same moment and the temperature change rate is taken as the material heat storage rate at each moment; the difference between the reactor core temperature value and the jacket temperature value at each moment is calculated, and the product of the difference, the heat transfer coefficient, and the heat transfer area is taken as the jacket heat transfer rate at each moment; the sum of the material heat storage rate and the jacket heat transfer rate is taken as the reaction exothermic rate at each moment.

[0042] It should be noted that, according to the first law of thermodynamics, the total heat change resulting from the reaction of materials in the reactor consists of three parts: the heat change within the reactor, the heat removed through the jacket, and other heat losses to the environment. Therefore, the rate of heat release can be expressed as the sum of the rate of energy change within the reactor, the rate of heat removal through the jacket, and other heat loss rates.

[0043] The rate of temperature change represents the rate of heat accumulation within the reactor, while the product of material density, specific heat capacity, and volume constitutes the total heat capacity of the material. The material heat storage rate indicates the rate of sensible heat accumulation caused by temperature changes per unit time, directly reflecting the real-time energy changes within the reactor. The difference between the reactor temperature and the jacket temperature is the driving force for heat exchange. The heat transfer coefficient and heat transfer area characterize the actual heat exchange capacity of the equipment under current operating conditions, and the jacket heat transfer rate quantifies the heat forcibly removed per unit time through the jacket cooling system. Because reactors are typically well-insulated, the heat lost to the surrounding environment is usually one to two orders of magnitude lower than the intense exothermic reaction and the forced convection heat transfer from the jacket, making it a secondary factor. Ignoring it is a reasonable engineering simplification, reducing model complexity and reliance on additional sensors while ensuring core calculation accuracy. Therefore, the sum of the material heat storage rate and the jacket heat transfer rate quantifies the rate at which the chemical reaction within the reactor releases heat, denoted as the reaction exothermic rate.

[0044] The process involves sequentially collecting material volume and density data at each moment using a magnetostrictive level gauge and an online density meter installed inside the reactor. Specific heat capacity data for each pure component under standard conditions (from Material Safety Data Sheets (MSDS), chemical property databases, or laboratory measurements) are retrieved and weighted by mass fraction. The reactor's reference temperature at each moment is then substituted into a readily available empirical polynomial formula for specific heat capacity versus temperature to correct the aforementioned specific heat capacity data, thus obtaining the material's specific heat capacity at each moment. The heat transfer area is obtained from the reactor's equipment drawings or nameplate parameters; the heat transfer system can utilize empirical range values ​​provided by the equipment manufacturer.

[0045] It is important to note that, because the central region is located in the main area of ​​the reactants, it is least affected by the cooling of the reactor wall and uneven local stirring. Its temperature change best represents the overall thermal state of the reaction system. Therefore, the reaction exothermic rate analyzed based on the core temperature value inside the reactor has higher representativeness and accuracy. Under normal operating conditions of the dihydrochloric acid synthesis process, the temperature of the material inside the reactor is always higher than the temperature of the cooling medium in the jacket, i.e., the core temperature value inside the reactor is greater than the jacket temperature value. When the core temperature value inside the reactor is detected to be lower than the jacket temperature value, it indicates that there may be an abnormality in the cooling system (such as the cooling medium temperature setting being too high, the flow rate being severely insufficient, or the temperature sensor malfunctioning). This is an abnormal operating condition that needs to be investigated immediately, and the relevant data at this moment cannot be used for subsequent analysis. The unit of density is kg / m³, and the unit of specific heat capacity is joules / (kg). The unit of volume is cubic meters (°C), the unit of temperature change rate is degrees Celsius per second (°C / s), and the unit of heat storage rate of a material is watts (W). The unit of temperature is degrees Celsius, and the unit of heat transfer coefficient is watts per square meter (m²). (°C), the heat transfer area is measured in square meters, and the heat transfer rate of the jacket is measured in watts.

[0046] Preferably, in some possible implementations of the embodiments of the present invention, the method for obtaining the reaction characteristic degree is described in [reference needed]. Figure 2 The diagram illustrates a flowchart of a method for obtaining reaction characteristic according to an embodiment of the present invention, the method comprising: Step S310: Based on the correlation and synchronization between the reaction exothermic rate and the chlorine flow rate at each moment within the monitoring period, obtain the reaction characteristic degree of the oxidation stage during the monitoring period.

[0047] Preferably, in some possible implementations of the embodiments of the present invention, the method for obtaining the reaction characteristic of the oxidation stage includes: obtaining the correlation coefficient between the chlorine flow rate and the reaction exothermic rate at all times within each monitoring cycle, and recording it as the chlorine exothermic correlation; determining the extreme points of the chlorine flow rate and the reaction exothermic rate at all times within each monitoring cycle, and recording the extreme points corresponding to the chlorine flow rate and the reaction exothermic rate as chlorine fluctuation time and exothermic fluctuation time respectively; obtaining the time interval between each chlorine fluctuation time and all exothermic fluctuation times after that time within each monitoring cycle, and selecting the minimum time interval as the asynchrony interval of each chlorine fluctuation time; taking the average of the asynchrony intervals of all chlorine fluctuation times within each monitoring cycle as the asynchronous index; and obtaining the reaction characteristic of the oxidation stage in each monitoring cycle based on the asynchronous index and the chlorine exothermic correlation.

[0048] It should be noted that fluctuations introduced by disturbances in the process will first manifest in extreme changes in chlorine flow rate and then rapidly transmit to the exothermic reaction response. Extreme points are the most sensitive characteristic points in the dynamic process. The asynchronous interval quantifies the responsiveness of the reaction system to changes in chlorine input. The smaller this value, the more sensitive the reaction is to chlorine input, meaning a higher instantaneous synchronization between the exothermic reaction and the chlorine flow rate. The asynchronous index presents the overall synchronization level between the exothermic reaction and the chlorine flow rate within the monitoring period. A higher correlation between the chlorine exothermic reaction and a smaller asynchronous index indicates a stronger positive correlation between the chlorine flow rate and the rate of exothermic reaction, and a higher synchronization between the exothermic reaction and the chlorine flow rate, which better matches the essential characteristics of the oxidation stage. Therefore, the asynchronous index is negatively correlated with the reaction characteristic of the oxidation stage, while the chlorine exothermic correlation is positively correlated with the reaction characteristic of the oxidation stage.

[0049] In this embodiment of the invention, half of the sum of the chlorine exothermic correlation and the constant 1 is calculated to normalize the chlorine exothermic correlation and obtain the standard chlorine exothermic correlation; the asynchronous index is negatively correlated and normalized to obtain the standard synchronous index; the product of the standard chlorine exothermic correlation and the standard synchronous index for each monitoring cycle is used as the reaction characteristic of the oxidation stage for each monitoring cycle.

[0050] In this embodiment of the invention, the chlorine flow rate and reaction exothermic rate at all times within the monitoring period are arranged chronologically to obtain the chlorine flow rate sequence and the exothermic rate sequence, respectively. The correlation coefficient between the two sequences is the chlorine exothermic correlation. Based on the asynchronous indicators of all monitoring periods within the historical dihydrochloric acid synthesis time period, the Z-score standardization method is used to normalize the asynchronous indicators for each monitoring period. The difference between the constant 1 and the normalization result is used to achieve negative correlation and normalization of the asynchronous indicators. Subsequently, when obtaining the temperature exothermic correlation and temperature chlorine correlation, it is also necessary to first arrange the data of the same type within the monitoring period chronologically to obtain the corresponding sequences, and then calculate the correlation coefficient between the corresponding sequences of the two indicators.

[0051] In one implementation of this invention, the correlation coefficient is the Pearson correlation coefficient. In other embodiments, the correlation coefficient may be replaced with cosine similarity.

[0052] Step S320: Based on the correlation between the in-vessel temperature values ​​at each moment within the monitoring period and the exothermic rate and chlorine flow rate, obtain the reaction characteristic degree of the monitoring period in the condensation stage.

[0053] Preferably, in some possible implementations of the embodiments of the present invention, the method for obtaining the reaction characteristic degree of the condensation stage includes: obtaining the correlation coefficient between the in-vessel reference temperature value and the reaction exothermic rate at all times within each monitoring cycle, denoted as the temperature exothermic correlation degree; obtaining the absolute value of the correlation coefficient between the in-vessel reference temperature value and the chlorine flow rate value at all times within each monitoring cycle, denoted as the temperature chlorine correlation degree; performing a negative correlation mapping on the temperature chlorine correlation degree of each monitoring cycle, and using the product of the mapping result and the normalized result of the temperature exothermic correlation degree as the reaction characteristic degree of the condensation stage in each monitoring cycle.

[0054] It should be noted that the reference temperature inside the reactor can comprehensively characterize the thermal state of the entire reaction system, avoiding misjudgments of the overall process state due to localized temperature-sensitive changes. A higher temperature-exothermic correlation and a lower temperature-chlorine gas correlation indicate a stronger positive correlation between the reactor temperature and the rate of exothermic reaction, and a lower correlation between the reactor temperature and the chlorine gas flow rate, which better matches the essential characteristics of the condensation stage. Therefore, the temperature-exothermic correlation is positively correlated with the reaction characteristic of the oxidation stage, while the temperature-chlorine gas correlation is negatively correlated with the reaction characteristic of the condensation stage.

[0055] In this embodiment of the invention, half of the sum of the temperature exothermic correlation and the constant 1 is calculated to normalize the temperature exothermic correlation and obtain the standard temperature exothermic correlation; the difference between the constant 1 and the temperature chlorine correlation is used to perform a negative correlation mapping on the temperature chlorine correlation and obtain the standard temperature chlorine non-correlation; the product of the standard temperature exothermic correlation and the standard temperature chlorine non-correlation for each monitoring period is used as the reaction characteristic of the condensation stage for each monitoring period.

[0056] Step S330: Based on the reaction exothermic rate and the temperature inside the reactor during the monitoring period, obtain the reaction characteristic of the purification stage during the monitoring period.

[0057] Preferably, in some possible implementations of the embodiments of the present invention, the method for obtaining the reaction characteristic of the purification stage includes: averaging the reference temperature values ​​inside the vessel at all times within each monitoring cycle to obtain the overall temperature value; and performing negative correlation and normalization on the product of the overall exothermic rate and the overall temperature value to obtain the reaction characteristic of the purification stage.

[0058] It should be noted that the purification stage aims to purify the product, remove residual impurities, or terminate residual reactions. Ideally, it should be in a stable state with low exothermic activity or even close to thermal equilibrium. By selecting the maximum value between the reaction exothermic rate and zero as the adjusted exothermic rate, effective information reflecting residual reactivity or abnormal side reaction exothermic reactions can be highlighted, providing a clear and robust quantitative basis for determining whether the monitoring period is within a mild and controllable purification stage. The smaller the overall exothermic rate and overall temperature value, the closer the overall reaction exothermic rate is to zero and the lower the temperature inside the reactor during the monitoring period, which better matches the essential characteristics of the purification stage. Therefore, both the overall exothermic rate and overall temperature value are negatively correlated with the reaction characteristic of the purification stage.

[0059] In this embodiment of the invention, the product of the overall exothermic rate and the overall temperature value for each monitoring cycle within the historical dihydrochloric acid synthesis period is calculated and recorded as the analytical index for each monitoring cycle. Based on the analytical indexes for all monitoring cycles within the historical dihydrochloric acid synthesis period, the maximum-minimum normalization method is used to normalize the analytical indexes for each monitoring cycle. The difference between the constant 1 and the normalization result is used to achieve negative correlation and normalization of the analytical indexes for each monitoring cycle.

[0060] Preferably, in some possible implementations of the embodiments of the present invention, the method for determining the reaction stage to which each monitoring cycle belongs includes: the reaction stages included in the dihydrochloric acid synthesis process are, in sequence, an oxidation stage, a condensation stage, and a purification stage; the reaction stage to which the first monitoring cycle in the historical dihydrochloric acid synthesis process belongs is set as the oxidation stage; the second monitoring cycle is taken as the initial analysis cycle, and it is determined whether there is a reaction stage after the reaction stage to which the adjacent previous monitoring cycle belongs. If so, the reaction stage to which the adjacent previous monitoring cycle belongs and its adjacent next reaction stage are recorded as the suspected stages of the analysis cycle, and the suspected stage corresponding to the maximum value of the reaction characteristic degree of the two suspected stages is selected as the reaction stage to which the analysis cycle belongs; if not, the reaction stage to which the analysis cycle belongs is set as the purification stage.

[0061] It should be noted that since the material undergoes oxidation at the start of the dihydrochloric acid synthesis reaction, the reaction stage of the first monitoring cycle can be directly set as the oxidation stage. The evolution of chemical reaction stages is unidirectional and continuous, and reverse jumps are impossible. That is, dihydrochloric acid synthesis proceeds in the order of oxidation, condensation, and purification stages. Therefore, the analysis cycle can only be in the stage of its adjacent preceding cycle or the immediately following stage, preventing unreasonable stage jump judgments and ensuring that the stage identification logic conforms to physicochemical laws. The reaction characteristic degree is the core indicator for quantifying the matching degree between the process state of the analysis cycle and the ideal mode of each stage. The larger the value, the better the match between the reaction mode of the analysis cycle and the typical characteristics of each stage, and the greater the probability that the analysis cycle is in the analysis stage corresponding to the maximum reaction characteristic degree. Purification is the final stage of the process. Once it is confirmed that the adjacent preceding monitoring cycle of the analysis cycle is in the purification stage, the analysis cycle must be in the purification stage.

[0062] Preferably, in some possible implementations of the embodiments of the present invention, the method for obtaining historical clusters includes: obtaining the pressure value of the reactor at each moment during the historical dihydrochloric acid synthesis period; taking the ratio of the pressure value difference between each moment and the adjacent previous moment to the time interval between the corresponding two moments as the reaction pressure rate at each moment; constructing a feature vector from the average reaction exothermic rate and the average reaction pressure rate at all moments in each monitoring cycle; and clustering the monitoring cycles of the same type of reaction stage based on the distance between the feature vectors of different monitoring cycles to obtain the historical clusters of each type of reaction stage.

[0063] It should be noted that the pressure change rate reflects the instantaneous rate of gas generation or consumption within the reactor, sensitively capturing dynamic pressure changes and serving as a precursor indicator of reaction intensity and safety status. The reaction exothermic rate reflects the intensity of heat release. Using the average of these two rates as a feature vector allows for a comprehensive characterization of the reaction's overall state from two essential dimensions: energy release and gas effects. Clustering monitoring cycles for the same reaction stage based on the distance between feature vectors allows for the classification of historical data into common process state patterns based on the similarity of reaction behavior, providing a foundation for subsequent pattern-matching-based risk warnings.

[0064] In one implementation of this invention, the monitoring period is clustered using the K-means clustering algorithm, wherein the K value is determined by the elbow method.

[0065] Preferably, in some possible implementations of the embodiments of the present invention, the method for obtaining the risk alarm coefficient includes: obtaining alarm information and its handling measures within a preset future window of each monitoring cycle in the historical dihydrochloric acid process; constructing a set of handling measures for each historical cluster by combining the handling measures for alarm information within the preset future window of all monitoring cycles in the same historical cluster; recording the monitoring cycle in which alarm information exists within the preset future window as a key cycle, and using the ratio of the number of key cycles in each historical cluster to the total number of monitoring cycles as the historical alarm coefficient; determining the reaction stage to which the current cycle belongs; calculating the Euclidean distance between the feature vector of the current cycle and the centroids of all historical clusters in the reaction stage to which the current cycle belongs, and selecting the historical alarm coefficient and handling measure set of the historical cluster corresponding to the smallest Euclidean distance, which are then used as the reference set of risk alarm coefficient and handling measures for the current cycle.

[0066] It should be noted that each historical cluster represents a specific process operation mode. Summarizing the measures that have successfully handled alarms under the same historical mode forms the handling measures for that mode. The historical alarm coefficient quantifies the historical probability of an alarm occurring within a preset window in the monitoring cycle of each historical cluster. The larger the value, the greater the likelihood that an anomaly will occur and trigger an alarm after entering the corresponding process operation mode of that cluster in the past; conversely, the process operation mode is usually very stable, and alarms rarely occur subsequently. The Euclidean distance between the feature vector of the current cycle and the centroid of the historical cluster of the reaction stage to which the current cycle belongs presents the similarity between the process state of the current cycle and the historical mode. The most similar historical state is determined by the minimum Euclidean distance, thereby realizing risk prediction for the current cycle, i.e., the risk alarm coefficient. The larger the risk alarm coefficient, the greater the probability of an anomaly occurring in the current cycle in the future, and the higher the risk level of the warning should be. When the system issues an alarm in the current cycle, it can provide a list of historically validated handling measures for the current operation mode, i.e., a reference set of handling measures, greatly improving the efficiency and accuracy of operators in responding to anomalies.

[0067] It is important to note that the current dihydrochloric acid synthesis process, from the moment the raw material feed is completed and the reaction begins to the present moment, is designated as the current dihydrochloric acid synthesis period. The first monitoring cycle within this period is designated as the initial current cycle, and the end moment of the current cycle is designated as the current moment. As the reaction progresses, the current cycle is continuously updated until the product is removed from the reactor. The method for obtaining the feature vector of each updated current cycle and the method for determining the reaction stage to which that cycle belongs are the same as the methods for determining the feature vector of the monitoring cycle and the reaction stage to which that cycle belongs. Furthermore, the risk alarm coefficient for each updated current cycle is obtained using the method described above. Monitoring cycles without a preset future window are not included in subsequent analyses.

[0068] Example 2: Based on the same inventive concept as the above-described embodiment of a temperature-pressure interlocked dihydrochloric acid synthesis process, one embodiment of the present invention provides a temperature-pressure interlocked reaction vessel apparatus. The apparatus includes a processor, which, when executed, implements the temperature-pressure interlocked dihydrochloric acid synthesis process as described above. The temperature-pressure interlocked dihydrochloric acid synthesis process has been described in detail in the above embodiments and will not be repeated here.

[0069] This embodiment can divide the device into functional modules based on the above method example. For example, each module can correspond to a separate function, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware. It should be noted that the module division in this embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0070] When each module is divided according to its function, the device may also include a communication module, a signal analysis module, a complexity analysis module, and a positioning module. It should be noted that all relevant content of each step involved in the above method embodiments can be referenced from the functional descriptions of the corresponding functional modules, and will not be repeated here.

[0071] It should be understood that the apparatus provided in this embodiment is used to perform the above-described temperature-pressure interlock control process for the synthesis of dihydrochloric acid, and therefore can achieve the same effect as the above-described implementation method.

[0072] When using integrated units, the device may include a processing module and a storage module. When applied to a workpiece, the processing module can be used to control and manage the workpiece's operations. The storage module can be used to support the execution of program code by the workpiece.

[0073] The processing module may be a processor or a controller, which can implement or execute various exemplary logic blocks, modules, and circuits contained in conjunction with the disclosure of this application. The processor may also be a combination of functions that implement computing capabilities, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc., and the storage module may be a memory.

[0074] Example 3: This embodiment also provides a computer-readable storage medium storing computer program code. When the computer program code is run on a computer, the computer executes the above-described related method steps to implement a temperature-pressure interlocked controlled dihydrochloric acid synthesis process provided in the above embodiment.

[0075] Example 4: This embodiment also provides a computer program product that, when run on a computer, causes the computer to perform the aforementioned related steps to realize a temperature-pressure interlocked controlled dihydrochloric acid synthesis process provided in the above embodiment.

[0076] In this embodiment, the device, computer-readable storage medium, computer program product, or chip are all used to execute the corresponding methods provided above. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods provided above, and will not be repeated here.

[0077] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0078] It should be noted that the order of the above embodiments of the present invention is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. The processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0079] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

Claims

1. A temperature-pressure interlock controlled process for the synthesis of dihydrochloric acid, characterized in that, The process includes: The reactor was equipped with temperature, chlorine flow rate, and pressure values ​​at each moment during the historical dihydrochloric acid synthesis period. The reaction exothermic rate at each moment is determined based on the internal heat accumulation and external heat loss of the reactor at each moment. The historical dihydrochloric acid synthesis period was divided into different monitoring periods. Based on the correlation and synchronization of the reaction exothermic rate and chlorine flow rate at each moment within the monitoring period, the correlation between the in-vessel temperature and the reaction exothermic rate and chlorine flow rate, and the magnitude of the reaction exothermic rate, the reaction characteristic of the monitoring period in the oxidation, condensation and purification stages was determined. Based on the continuity of the dihydrochloric acid synthesis process sequence and the state matching of reaction characteristics, the reaction stage to which each monitoring cycle belongs is determined; based on the changes in reaction exothermic rate and pressure value inside the reactor, the monitoring cycles of the same type of reaction stage are divided into different historical clusters. Based on the alarm information within a preset future window of the historical cluster monitoring cycle that matches the current cycle and its corresponding reaction stage during the current dihydrochloric acid synthesis period, the risk alarm coefficient for the current cycle is determined.

2. The temperature-pressure interlock controlled dihydrochloric acid synthesis process according to claim 1, characterized in that, Determining the rate of heat release at each moment includes: The material density, specific heat capacity, and volume of the material in the reactor at each moment during the historical dihydrochloric acid synthesis period were obtained, as well as the heat transfer coefficient and heat transfer area of ​​the reactor and the jacket temperature value at each moment. The temperature inside the vessel includes the core temperature inside the vessel; the ratio of the difference between the core temperature inside the vessel at each moment and the adjacent previous moment to the time interval between the two moments is taken as the temperature change rate at each moment; the product of the material density, specific heat capacity, and volume at the same moment with the temperature change rate is taken as the material heat storage rate at each moment. Calculate the difference between the core temperature and the jacket temperature at each moment, and use the product of the difference, the heat transfer coefficient and the heat transfer area as the jacket heat transfer rate at each moment. The sum of the material heat storage rate and the jacket heat transfer rate is taken as the reaction exothermic rate at each moment.

3. The temperature-pressure interlock controlled dihydrochloric acid synthesis process according to claim 1, characterized in that, The determination of reaction characteristic values ​​during the monitoring period in the oxidation, condensation, and purification stages includes: Based on the correlation and synchronization between the reaction exothermic rate and the chlorine flow rate at each moment within the monitoring period, the reaction characteristic of the monitoring period in the oxidation stage is determined. The internal temperature value includes the internal reference temperature value; based on the internal reference temperature value at each moment within the monitoring period, the correlation between the exothermic rate and the chlorine flow rate is reflected, and the reaction characteristic of the monitoring period in the condensation stage is determined. Based on the reaction exothermic rate and the reference temperature inside the vessel during the monitoring period, the reaction characteristic of the monitoring period in the purification stage is determined.

4. The temperature-pressure interlock controlled dihydrochloric acid synthesis process according to claim 3, characterized in that, The determination of the reaction characteristic degree during the oxidation phase of the monitoring cycle includes: Obtain the correlation coefficient between the chlorine flow rate and the reaction exothermic rate at all times within each monitoring cycle, and denot it as the chlorine exothermic correlation coefficient. The extreme points of chlorine flow rate and reaction exothermic rate at all times in each monitoring cycle are determined respectively, and the extreme points corresponding to chlorine flow rate and reaction exothermic rate are recorded as chlorine fluctuation time and exothermic fluctuation time respectively. The time interval between each chlorine fluctuation moment and all exothermic fluctuation moments following that moment is obtained within each monitoring cycle. The minimum time interval is selected as the asynchronous interval for each chlorine fluctuation moment. The average of the asynchronous intervals for all chlorine fluctuation moments within each monitoring cycle is used as the asynchronous index. Based on the correlation between the asynchrony index and the exothermic reaction of chlorine, the reaction characteristic degree of each monitoring cycle in the oxidation stage is obtained.

5. The temperature-pressure interlock controlled dihydrochloric acid synthesis process according to claim 3, characterized in that, The determination of the response characteristics during the condensation phase of the monitoring cycle includes: Obtain the correlation coefficient between the reference temperature value inside the vessel and the reaction exothermic rate at all times within each monitoring cycle, and denot it as the temperature exothermic correlation. The absolute value of the correlation coefficient between the reference temperature value inside the vessel and the chlorine flow rate value at all times within each monitoring cycle is obtained and denoted as the temperature-chlorine correlation coefficient. A negative correlation mapping is performed on the temperature-chlorine correlation of each monitoring cycle. The product of the mapping result and the normalized result of the temperature-exothermic correlation is used as the reaction characteristic of each monitoring cycle in the condensation stage.

6. The temperature-pressure interlock controlled dihydrochloric acid synthesis process according to claim 3, characterized in that, The determination of the reaction characteristic of the monitoring period during the purification stage includes: The maximum value between the reaction exothermic rate and the zero value at each moment is selected and recorded as the adjusted exothermic rate at the corresponding moment; the sum of the adjusted exothermic rates at all moments in each monitoring cycle is taken as the overall exothermic rate. The overall temperature value is obtained by averaging the reference temperature values ​​inside the vessel at all times within each monitoring cycle. The product of the overall exothermic rate and the overall temperature value is negatively correlated and normalized to obtain the reaction characteristic of the purification stage.

7. The temperature-pressure interlock controlled dihydrochloric acid synthesis process according to claim 1, characterized in that, Determining the response phase to which each monitoring cycle belongs includes: The synthesis process of dihydrochloric acid includes reaction stages in the following order: oxidation stage, condensation stage and purification stage. The reaction stage of the first monitoring cycle in the historical dihydrochloric acid synthesis process is set as the oxidation stage; the second monitoring cycle is used as the initial analysis cycle. It is determined whether there is a reaction stage after the reaction stage of the adjacent previous monitoring cycle. If so, the reaction stage of the adjacent previous monitoring cycle and its adjacent next reaction stage are recorded as the suspected stages of the analysis cycle. The suspected stage corresponding to the maximum value of the reaction characteristic of the two suspected stages is selected as the reaction stage of the analysis cycle; if not, the reaction stage of the analysis cycle is set as the purification stage.

8. The temperature-pressure interlock controlled dihydrochloric acid synthesis process according to claim 1, characterized in that, The method of dividing the monitoring cycle of the same type of reaction stage into different historical clusters includes: The ratio of the pressure difference between the pressure values ​​inside the vessel at each time point and the pressure difference between the two preceding time points is taken as the pressure change rate at each time point. The feature vector is composed of the average reaction heat release rate and the average pressure change rate at all times within each monitoring cycle; Based on the distance between feature vectors of different monitoring periods, the monitoring periods of the same type of reaction stage are clustered to obtain the historical clusters of each type of reaction stage.

9. The temperature-pressure interlock controlled dihydrochloric acid synthesis process according to claim 1, characterized in that, The determination of the risk alarm coefficient for the current period includes: Obtain alarm information and its handling measures within a preset future window for each monitoring cycle during the historical dihydrochloric acid process; The processing measures for alarm information within the preset future window of all monitoring periods within the same historical cluster are constituted, forming a set of processing measures for each historical cluster. The monitoring period with alarm information within the preset future window is recorded as the critical period, and the ratio of the number of critical periods in each historical cluster to the total number of monitoring periods is used as the historical alarm coefficient. Determine the reaction stage to which the current cycle belongs; calculate the Euclidean distance between the feature vector of the current cycle and the centroids of all historical clusters in the reaction stage to which the current cycle belongs; select the historical alarm coefficients and treatment measures set corresponding to the historical clusters with the smallest Euclidean distance, and use them as the reference set of risk alarm coefficients and treatment measures for the current cycle.

10. A reaction vessel device with temperature-pressure interlock control, characterized in that, The device includes a processor that, when executed, implements the steps of a temperature-pressure interlocked dihydrochloric acid synthesis process as described in any one of claims 1 to 9.

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