Adipic acid production and storage equipment

Abstract

The invention relates to the technical field of mixing equipment, in particular to adipic acid production and storage equipment which comprises a reaction monitoring module, a reaction adjusting module and a substance extraction module, the reaction monitoring module comprises a data acquisition module and a data analysis control chip, and the reaction adjusting module comprises a stirring structure and a cooling structure; the data analysis control chip analyzes and processes data acquired by the data acquisition module in real time to obtain a temperature adjustment demand value, and obtains a reaction condition optimization coefficient in combination with change trends of reactant concentration and product concentration in a monitoring time period; the operation speed of the stirring structure and the cooling structure is adjusted in real time, the stirring module and the cooling structure are stopped until the reactant concentration at the current moment meets the stopping condition, and adipic acid is extracted through the substance extraction module. The production efficiency of adipic acid is higher.

Description

Technical Field

[0001] The invention relates to the technical field of mixing equipment, and in particular to adipic acid production and storage equipment. Background Art

[0002] Adipic acid is an important chemical raw material, widely used in nylon, plastics, coatings and synthetic fibers. With the increasing market demand for high-performance materials, the technical requirements for adipic acid production and storage equipment are becoming more stringent to ensure production efficiency, product quality and environmental safety. Therefore, the efficiency and stability of adipic acid production equipment directly affect production costs and product quality. It is particularly important to develop an efficient and safe adipic acid production and storage equipment.

[0003] The stirring structure and cooling structure in the existing adipic acid production equipment are adjusted to a fixed operating speed to avoid the occurrence of side reactions during the reaction process, so as to improve the product quality. Different reaction conditions will be produced in different reaction stages during the reaction process, but the fixed operating speed cannot maintain the stability of the reaction conditions, thereby reducing the production quality and production efficiency of adipic acid. Summary of the invention

[0004] In order to solve the technical problem that a fixed operating speed cannot maintain the stability of reaction conditions in the adipic acid production process, thereby reducing the production quality and production efficiency of adipic acid, the object of the present invention is to provide an adipic acid production and storage device, and the technical solution adopted is as follows:

[0005] An adipic acid production and storage device, comprising a reaction monitoring module, a reaction regulating module, a material extraction module and a reaction container, wherein the reaction monitoring module comprises a data acquisition module and a data analysis control chip, and the reaction regulating module comprises a stirring structure and a cooling structure;

[0006] The data acquisition module is connected to the signal input end of the data analysis control chip, and the signal output end of the data analysis control chip is connected to the reaction regulation module; the data acquisition module is used to collect the temperature value set, pressure value, reactant concentration and product concentration of the reaction container at each moment in the monitoring time period in real time, and transmit them to the data analysis control chip; the end time of the monitoring time period is the current time;

[0007] The data analysis control chip is used to obtain the temperature adjustment demand value according to the fluctuation degree of the temperature value and the mutation degree of the pressure value in the temperature value set at all times within the monitoring time period;

[0008] According to the changing trend of the reactant concentration and the product concentration during the monitoring period, and the temperature adjustment demand value, the reaction condition optimization coefficient is obtained; the operation speed of the stirring structure and the cooling structure is adjusted in real time using the reaction condition optimization coefficient; until the reactant concentration at the current moment meets the stop condition, the stirring module and the cooling structure are stopped, and adipic acid is extracted using the substance extraction module.

[0009] Further, obtaining the temperature adjustment requirement value includes:

[0010] The temperature value set includes a first temperature value and a second temperature value, and one of the first temperature value and the second temperature value is selected as the analysis temperature value; the temperature promotion effect value is obtained according to the fluctuation degree of the analysis temperature value at all times in the monitoring time period and the difference between the first temperature value and the second temperature value;

[0011] According to the difference between the pressure value at each moment in the monitoring time period and the pressure value at the moment in the preset adjacent window, the overall mutation value is obtained;

[0012] A temperature regulation requirement value is obtained according to the temperature promotion effect value and the overall mutation value.

[0013] Further, the obtaining of the temperature promotion effect value includes:

[0014] Obtain the variance of the analysis temperature values ​​at all times in the monitoring time period and record it as a temperature fluctuation index; calculate the average of the absolute values ​​of the differences between the analysis temperature values ​​at all times in the monitoring time period and the expected constant temperature values ​​as a constant temperature difference index;

[0015] According to the temperature fluctuation index and the constant temperature difference index, a temperature positive promotion value is obtained; the temperature fluctuation index and the constant temperature difference index are both negatively correlated with the temperature positive promotion value;

[0016] Obtaining the concentrated value of the analyzed temperature values ​​at all times within the monitoring time period, and recording it as a temperature concentration index; taking the absolute value of the difference between the temperature concentration index of the first temperature value and the temperature concentration index of the second temperature value as a temperature difference value;

[0017] The temperature promotion effect value is obtained according to the temperature difference value and the temperature positive promotion value; the temperature positive promotion value and the temperature promotion effect value are positively correlated, and the temperature difference value and the temperature promotion effect value are negatively correlated.

[0018] Further, obtaining the temperature positive promotion value includes:

[0019] Calculate the cumulative sum of the differences between each moment and the pressure values ​​of the remaining moments in the preset adjacent window except each moment, and record the absolute value of the cumulative sum as the local mutation value of each moment;

[0020] The average of the local mutation values ​​at all times within the monitoring time period is taken as the overall mutation value.

[0021] Further, the obtaining of the reaction condition optimization coefficient comprises:

[0022] Record the reactant concentration and the product concentration as analytical concentration; obtain the correlation coefficient between the analytical concentrations corresponding to all moments in the monitoring period and record it as an analytical trend index; record the difference between the analytical trend index of the product concentration and the analytical trend index of the reactant concentration as a trend difference index;

[0023] The product of the analytical trend index of the product concentration and the trend difference index is used as a reaction efficiency index;

[0024] A reaction condition optimization coefficient is obtained according to the temperature adjustment requirement value and the reaction efficiency index.

[0025] Furthermore, the method of adjusting the operating speeds of the stirring structure and the cooling structure in real time by using the reaction condition optimization coefficient includes:

[0026] The cooling structure achieves cooling treatment by means of a cooling medium flowing through the interior of the structure;

[0027] The sum of the constant 1 and the reaction condition optimization coefficient is used as the adjustment coefficient at the current moment;

[0028] Determine whether the analysis trend index of the product concentration is greater than a preset trend threshold value. If so, weight the preset standard flow rate using the adjustment coefficient to obtain the optimized flow rate of the cooling medium in the cooling structure at the current moment; if not, weight the preset standard rotation speed using the adjustment coefficient to obtain the optimized rotation speed of the stirring structure at the current moment;

[0029] The optimized flow rate corresponding to the cooling structure is the operating speed of the cooling structure, and the optimized rotation speed of the stirring structure is the operating speed of the stirring structure.

[0030] Further, the reactant concentration at the current moment satisfies the stop condition when the reactant concentration at the current moment is less than a preset concentration limit value.

[0031] Furthermore, the concentrated value is a mean value.

[0032] Furthermore, the correlation coefficient is a Pearson correlation coefficient.

[0033] Furthermore, the length of the preset adjacent window is 3.

[0034] The present invention has the following beneficial effects:

[0035] The present invention deploys a reaction monitoring module on the adipic acid production and storage equipment, wherein the data acquisition module in the reaction monitoring module can collect data of the reaction container within a certain period of time, and provides a data basis for the subsequent adjustment of the running speed of the stirring structure and the cooling structure in the reaction adjustment module. The degree of fluctuation of the temperature value in the monitoring time period presents the promoting effect of temperature on the reaction; since the pressure change in the reaction container will cause the temperature in the constant temperature stage to fluctuate, the degree of mutation of the pressure value in the monitoring time period presents the credibility of the temperature value in the reaction container, and the above two factors are combined to analyze and improve the accuracy of the promoting effect of temperature on the reaction, and the promoting effect corresponding to the temperature can represent the regulation strength of the temperature in the reaction container, thereby obtaining the temperature regulation demand value; in the actual production process of adipic acid, the concentration change trend of the reactant and the product directly represents the reaction efficiency in the reaction process, and is combined with the temperature regulation demand value of the adjustment strength required to present the temperature in the reaction container for analysis, to improve the accuracy of the temperature regulation demand, and obtain the reaction condition optimization coefficient; the reaction condition optimization coefficient is used to adjust the running speed of the stirring structure and the cooling structure in real time, which can effectively maintain the stability of the reaction conditions in the reaction container, thereby improving the production quality and production efficiency of adipic acid. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 This is an appearance structure diagram of an adipic acid production and storage device provided by one embodiment of the present invention;

[0038] Figure 2 An overall structural diagram of an adipic acid production and storage device provided by one embodiment of the present invention;

[0039] Figure 3 An internal structure diagram of an adipic acid production and storage device provided by one embodiment of the present invention;

[0040] Figure 4 A flow chart of a method performed by an adipic acid production and storage device provided in one embodiment of the present invention;

[0041] The numbers in the accompanying drawings are: 1. reaction vessel; 2. driving motor with controller; 3. bolt; 4. vessel bracket; 5. water outlet; 6. pressure sensor; 7. online monitoring center; 8. valve; 9. filter box; 10. drying box; 11. product outlet; 12. circulation pipe inlet; 13. circulation pipe; 14. temperature sensor; 15. solid pipe; 16. paddle board; 17. circulation pipe outlet; 18. slip ring. DETAILED DESCRIPTION

[0042] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation, structure, features and effects of adipic acid production and storage equipment proposed by the present invention in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0043] Unless defined otherwise, 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 belongs.

[0044] An adipic acid production and storage device provided in an embodiment of the present invention includes a reaction monitoring module, a reaction regulating module, a material extraction module and a reaction container. The reaction container is where the reactants react. The reaction monitoring module is used to detect and analyze the reaction conditions in the reaction container. Therefore, the reaction monitoring module includes a data acquisition module and a data analysis control chip. Among them, the data acquisition module is connected to the data analysis control chip, which is used for data processing and machine control. The chip type is FPGA, which receives information from the data acquisition module and sends control instructions to the reaction regulation module.

[0045] The specific scheme of adipic acid production and storage equipment provided by the present invention is described in detail below with reference to the accompanying drawings.

[0046] See also Figure 1 , Figure 2 and Figure 3 These drawings show the structural diagram of adipic acid production and storage equipment provided by one embodiment of the present invention, and the adipic acid production and storage equipment includes: a reaction vessel 1; a driving motor 2 with a controller; bolts 3; a vessel bracket 4; a water outlet 5; a pressure sensor 6; an online monitoring center 7; a valve 8; a filter box 9; a drying box 10; a product outlet 11; a circulation pipe inlet 12; a circulation pipe 13; a temperature sensor 14; a solid pipe 15; a paddle 16; a circulation pipe outlet 17; and a slip ring 18.

[0047] The data acquisition module is connected to the signal input end of the data analysis control chip, and the signal output end of the data analysis control chip is connected to the reaction regulation module; the data acquisition module is used to collect the temperature value set, pressure value, reactant concentration and product concentration of the reaction container 1 at each moment in the monitoring time period in real time, and transmit them to the data analysis control chip; the end time of the monitoring time period is the current time.

[0048] In the embodiment of the present invention, the pressure sensor 6, the temperature sensor 14 and the online monitoring center 7 together constitute a data acquisition module. The stirring structure is composed of a circulation pipe 13, a solid pipe 15 and a paddle 16; the cooling structure is composed of a circulation pipe inlet 12, a circulation pipe 13 and a circulation pipe outlet 17; the stirring structure and the cooling structure together constitute a reaction adjustment module. The material extraction module is composed of a filter box 9, a drying box 10 and a product outlet. Among them, the online monitoring center 7 is used to collect the concentration of reactants and products in the reaction container.

[0049] In the initial stage of the contact reaction between the reactants and the catalyst, the oxidation reaction is carried out from the outside of the solution to the inside of the solution. In order to fully mix the reactants and the catalyst and ensure that the reaction proceeds synchronously, the traditional vertical stirring shaft of the stirring structure in the adipic acid production and storage equipment is set as a crank stirring shaft in the embodiment of the present invention. The solid pipe 15 of the stirring structure is to avoid the problem that the hollow pipe is easily subject to large liquid resistance during the stirring and rotating process. The three paddles 16 can also pry the solution apart during the rotation process to play a certain stirring role.

[0050] The cooling medium enters the cooling structure from the circulation pipe inlet 12, flows through the circulation pipe 13, and then flows out from the circulation pipe outlet 17. The circulation pipe 13 is hollow, and the hollow circulation pipe 13 is used to control the temperature during the reaction process through the cooling medium and eliminate the excess heat generated during the reaction. The slip ring 18 is located near the circulation pipe inlet 12. The slip ring 18 is also called a rotary joint. It is a device that allows fluid to pass through a rotating part, which can keep the circulation pipe inlet 12 and the rotating shaft relatively still, while allowing the cooling medium to pass during the rotation process.

[0051] It should be noted that the data collection frequency of the pressure sensor 6, the temperature sensor 14 and the online monitoring center in the embodiment of the present invention is once every 3 seconds, and the three collect data at the same time, which can be set by the implementer according to the specific situation. Figure 3As shown, there are two temperature sensors in the device of this embodiment, one is located on the left side of the solid pipe 15, and the temperature value collected by the temperature sensor is recorded as the first temperature value; the other is located on the right side of the solid pipe 15, and the temperature value collected by the temperature sensor is recorded as the second temperature value, which is used to collect the temperature at different positions in the solution. The time period between the moment when the container cover is closed after adding reactants and catalysts to the reaction container and the current moment is used as the monitoring time period. Among them, the reactant in this embodiment is benzene, and it can also be hexene or cyclohexene; the catalyst is a ruthenium-based catalyst and a nickel catalyst, etc.

[0052] The steps of the operation process of adipic acid production and storage equipment are:

[0053] (1) Add the reactants and catalyst into the reaction container 1, and fix the container cover with the bolts 3 on the container cover.

[0054] (2) A driving motor 2 with a controller is connected to the stirring structure. When the reaction container is closed, the driving motor is started by the controller to drive the stirring structure to rotate, thereby stirring the solution.

[0055] (3) When the temperature in the reaction container reaches a certain value, the temperature in the reaction container is adjusted by injecting a cooling medium into the cooling structure.

[0056] (4) When the reaction is completed, the valve 8 is opened, and the reaction-completed container flows out through the water outlet 5, and the adipic acid is extracted by the material extraction module. The specific extraction method is: the reaction-completed container flows through the water outlet 5 to the filter box 9 of the material extraction module, and the filter box 9 filters out the solid particles in the solution after the reaction; then the filtered solution is distilled and crystallized through the drying box 10; then the solute in the solution is further dried through the product outlet 11, and finally the treated adipic acid is stored.

[0057] See also Figure 4 , which shows a flow chart of a method performed by an adipic acid production and storage device provided in an embodiment of the present invention, the method comprising the following steps:

[0058] Step S100: obtaining a temperature adjustment demand value according to the degree of fluctuation of the temperature values ​​and the degree of mutation of the pressure values ​​in the temperature value set at all times within the monitoring time period.

[0059] Since the reactants in the reaction container obtain products through oxidation reaction, the oxidation reaction is an exothermic process, and the actual reaction process may also require heating the reaction container, the temperature change of the reaction container during the entire reaction process generally goes through three stages, namely, the heating stage, the constant temperature stage and the cooling stage. The temperature gradually increases at the initial stage of the reaction, remains stable after reaching a certain temperature, and gradually decreases after the reaction ends.

[0060] The degree of fluctuation of the temperature value during the monitoring period shows the promoting effect of the temperature on the reaction during the monitoring period; since the pressure change in the reaction vessel will cause the temperature to fluctuate during the constant temperature stage, the degree of sudden change of the pressure value during the monitoring period shows the credibility of the temperature value in the reaction vessel. Combining the above two factors, the accuracy of the promoting effect of the temperature on the reaction is improved. The promoting effect corresponding to the temperature can represent the degree of regulation of the temperature in the reaction vessel, thereby obtaining the temperature regulation demand value.

[0061] Step S110: The temperature value set includes a first temperature value and a second temperature value. One of the first temperature value and the second temperature value is selected as the analysis temperature value. The temperature promotion effect value is obtained based on the fluctuation degree of the analysis temperature value at all times within the monitoring time period and the difference between the first temperature value and the second temperature value.

[0062] Preferably, in some possible implementation methods of the present embodiment, the method for obtaining the temperature promotion effect value includes: obtaining the variance of the analysis temperature values ​​at all times within the monitoring time period and recording it as a temperature fluctuation index; calculating the mean of the absolute values ​​of the differences between the analysis temperature values ​​at all times within the monitoring time period and the expected constant temperature values, as a constant temperature difference index; obtaining the temperature positive promotion value based on the temperature fluctuation index and the constant temperature difference index; the temperature fluctuation index and the constant temperature difference index are both negatively correlated with the temperature positive promotion value; obtaining the concentration value of the analysis temperature values ​​at all times within the monitoring time period, recorded as a temperature concentration index; taking the absolute value of the difference between the temperature concentration index of the first temperature value and the temperature concentration index of the second temperature value as the temperature difference value; obtaining the temperature promotion effect value based on the temperature difference value and the temperature positive promotion value; the temperature positive promotion value is positively correlated with the temperature promotion effect value, and the temperature difference value is negatively correlated with the temperature promotion effect value.

[0063] The expected constant temperature value is a temperature that is conducive to the generation of the product. The closer the temperature is to the expected constant temperature value and the temperature is kept constant during the reaction, the more conducive the product is to the generation, and the reaction is positively promoted. The temperature fluctuation index presents the fluctuation of the temperature during the monitoring period. If the temperature fluctuation index and the constant temperature difference index are smaller, it means that the temperature is closer to the expected constant temperature value and the more stable it is during the reaction, so that it is more conducive to the generation of the product. The greater the degree of promotion of the reaction by the temperature during the monitoring period, the greater the positive promotion value of the temperature. Therefore, the temperature fluctuation index and the constant temperature difference index are negatively correlated with the positive promotion value of the temperature. In the present embodiment, the product of the temperature fluctuation index and the constant temperature difference index is negatively correlated and normalized to obtain the positive promotion value of the temperature.

[0064] It should be noted that this embodiment uses an exponential function with a natural constant as the base for negative correlation and normalization. The specific operation is: take the opposite of the product of the temperature fluctuation index and the constant temperature difference index, and use the opposite as the exponent of the exponential function with a natural constant as the base to achieve negative correlation and normalization. Variance, standard deviation and range can all reflect the degree of fluctuation of a set of data. This embodiment can also replace the variance in the temperature fluctuation index calculation process with standard deviation or range, etc., which is no longer limited here. Since the constant temperature stage has the longest duration among the three stages of the solution reaction process, this embodiment uses the mode of the first temperature value or the second temperature value in other adipic acid production processes as the preset constant temperature value; it can also be set according to actual conditions.

[0065] In the solution reaction process, the reaction conditions at different positions in the solution are inconsistent, that is, the temperature difference at different positions is large, which will reduce the reaction speed. The first temperature value and the second temperature value at the same time represent the temperature at different positions in the solution; the temperature concentration index reflects the overall level of the analysis temperature value during the monitoring period; if the difference between the first temperature value and the second temperature value during the monitoring period is smaller, that is, the difference between the temperature concentration index of the first temperature value and the temperature concentration index of the second temperature value is smaller, indicating that the reaction conditions at different positions in the solution during the reaction are more consistent, and the temperature in the monitoring period The promotion degree of the reaction is better. In summary, the larger the temperature positive promotion value and the smaller the temperature difference value, the better the promotion effect of the temperature on the reaction during the monitoring period, and the larger the temperature promotion effect value. Therefore, the temperature difference value and the temperature promotion effect value are negatively correlated, and the temperature positive promotion value and the temperature promotion effect value are positively correlated.

[0066] In this embodiment, the temperature positive promotion value is used as the numerator, and the ratio of the sum of the temperature difference value and the preset positive number is used as the denominator as the temperature promotion effect value. It should be noted that the preset positive number takes an empirical value of 0.1, which is used to prevent the denominator from being 0 and causing the fraction to be meaningless. In other embodiments, the correlation between the temperature positive promotion value and the temperature difference value and the temperature promotion effect value can also be constructed through other basic mathematical operations, which are not limited or elaborated here.

[0067] Step S120: Obtain the overall mutation value according to the difference between the pressure value at each moment in the monitoring time period and the pressure value at the moment in the preset adjacent window.

[0068] There are many factors in the actual production process that make it difficult to keep the temperature in the constant temperature stage completely constant. Specifically, pressure changes in the reaction vessel will affect the boiling point of the liquid, and increased pressure will increase the boiling point of the reactants and solvents. The equipment may require more energy to maintain a constant temperature, which will cause the temperature in the reaction vessel to fluctuate.

[0069] Preferably, in some possible implementations of the present embodiment, the method for obtaining the overall mutation value includes: calculating the cumulative sum of the differences between each moment and the pressure values ​​of the remaining moments in its preset adjacent window except each moment, and recording the absolute value of the cumulative sum as the local mutation value of each moment; and taking the average of the local mutation values ​​of all moments in the monitoring time period as the overall mutation value.

[0070] The local mutation value shows the degree of mutation of the pressure value at each moment compared with the pressure value at its adjacent moments. The larger the local mutation value, the greater the difference between the pressure value at each moment and the pressure value at its adjacent moments, and the greater the degree of mutation at that moment. The overall mutation value represents the overall level of the mutation degree at all moments in the monitoring period. The average of the local mutation values ​​at all moments in the monitoring period can be used as the overall mutation value.

[0071] It should be noted that in this embodiment, the length L of the preset adjacent window is set to an empirical value of 3, the width is 1, and the position of each moment and the center position of the preset adjacent window can be set by the implementer according to the specific situation. The moment and the last If the preset neighboring window at a moment is incomplete and the local mutation value cannot be obtained, the local mutation value at the above moment does not need to be considered in the process of obtaining the overall mutation value. The floor symbol.

[0072] Step S130: Obtain the temperature adjustment requirement value according to the temperature promotion effect value and the overall mutation value.

[0073] If the temperature promotion effect value is smaller, the promoting effect of temperature on the reaction in the monitoring time period is worse. In order to speed up the reaction efficiency, it is necessary to regulate the temperature in the reaction vessel more strongly; if the overall mutation value is larger, the mutation of the pressure value in the monitoring time period is stronger, indicating that the promoting effect of the solution reaction in the reaction vessel comes from the possibility of pressure change in the reaction vessel, and then the credibility of the temperature change in the reaction vessel is worse. In order to maintain the accuracy of the regulation and control analysis, the regulation and control of the temperature in the reaction vessel should be smaller. In the present embodiment, the greater the temperature regulation demand value, the greater the adjustment of the temperature in the reaction vessel should be. Therefore, the temperature promotion effect value and the overall mutation value are negatively correlated with the temperature regulation demand value.

[0074] In a specific implementation of this embodiment, the temperature adjustment requirement value is expressed by the formula:

[0075]

[0076] In the formula, w is the temperature regulation demand value; D is the temperature positive promotion value; H is the temperature difference value; is the temperature promotion effect value; ST is the overall mutation value; ε is a preset positive number; exp is an exponential function with the natural constant e as the base.

[0077] Step S200: Obtain the reaction condition optimization coefficient according to the difference in the change trend of the reactant concentration and the product concentration during the monitoring period, as well as the temperature adjustment requirement value; use the reaction condition optimization coefficient to adjust the operating speed of the stirring structure and the cooling structure in real time; until the reactant concentration at the current moment meets the stop condition, stop the stirring module and the cooling structure, and use the material extraction module to extract adipic acid.

[0078] In the actual production process of adipic acid, the concentration change trend of the reactants and products directly represents the reaction efficiency in the reaction process, and is analyzed in combination with the temperature adjustment demand value showing the adjustment strength required for the temperature in the reaction container to improve the accuracy of the temperature adjustment demand and obtain the reaction condition optimization coefficient. In this embodiment, the reactant is hexene and the product is adipic acid.

[0079] Preferably, in some possible implementations of the present embodiment, the method for obtaining the reaction condition optimization coefficient includes: recording the reactant concentration and the product concentration as analytical concentrations; obtaining the correlation coefficient between the analytical concentrations corresponding to all moments in the monitoring time period and the moment, and recording it as an analytical trend index; recording the difference between the analytical trend index of the product concentration and the analytical trend index of the reactant concentration as a trend difference index; taking the product of the analytical trend index of the product concentration and the trend difference index as a reaction efficiency index; and obtaining the reaction condition optimization coefficient based on the temperature adjustment requirement value and the reaction efficiency index.

[0080] The analysis trend index represents the change trend of the analysis concentration. Reaction efficiency is usually determined by the reaction rate and the conversion rate of the reaction; the greater the product concentration change trend, the faster the reaction rate; the smaller the change in the anti-product concentration, the higher the conversion rate of the reactant. If the difference between the product concentration change trend and the reactant concentration change trend, that is, the trend difference index, is greater, that is, the greater the product concentration change trend and the anti-product concentration change trend is smaller, indicating that the reaction is faster and most of the reactants are converted into products, the higher the reaction efficiency. The change trend of the product concentration directly presents the reaction efficiency, and the greater the analysis trend index of the reactant concentration, the higher the reaction efficiency. Therefore, the analysis trend index of the product concentration and the trend difference index are both positively correlated with the reaction efficiency index, and the present embodiment uses the product of the analysis trend index of the product concentration and the trend difference index as the reaction efficiency index.

[0081] If the reaction efficiency index is larger, it means that the oxidation rate in the reaction process is faster, and more heat may be released. However, if the temperature is too high, side reactions are likely to occur. To avoid side reactions, the temperature in the reaction vessel needs to be lowered. If the temperature adjustment demand value is larger, the adjustment of the temperature in the reaction vessel should be greater. Therefore, the temperature adjustment demand value and the reaction efficiency index are positively correlated with the reaction condition optimization coefficient.

[0082] It should be noted that the specific steps for obtaining the correlation coefficient between all moments and the analytical concentrations corresponding to the moments in the monitoring time period are: the moments in the monitoring time period constitute a moment sequence, the elements in the moment sequence are 1, 2, 3, 4, ... from front to back, and the last element in the time series is equal to the total number of moments in the monitoring time period; the analytical concentrations in the monitoring time period are arranged in time sequence to obtain a concentration sequence; and the correlation coefficient between the moment sequence and the concentration sequence is obtained. In this embodiment, the correlation coefficient is the Pearson correlation coefficient; in other embodiments, the correlation coefficient can also be the Spearman correlation coefficient, the Kendall rank correlation coefficient, the canonical correlation coefficient, etc.

[0083] In the actual production process of adipic acid, the temperature fluctuation in the reaction vessel may be caused by the exothermic oxidation reaction, or it may be caused by interference from multiple factors during the actual operation of the equipment. For different influencing factors, the optimization method of the reaction conditions is different.

[0084] During the production and storage of adipic acid, when the analytical trend index of the product concentration is greater than the preset trend threshold, it means that the product concentration in the reaction vessel increases with time, the oxidation rate during the reaction is high, and the temperature fluctuation in the reaction vessel is caused by the exothermic behavior of the oxidation reaction, which will release more heat. The temperature of the reaction vessel can be reduced to a stable state by increasing the flow rate of the cooling medium to eliminate the heat generated by the oxidation reaction, ensuring the stability of the reaction conditions and the reliability of the product quality. It should be noted that the cooling structure in the adipic acid production and storage equipment realizes cooling treatment through the cooling medium flowing through it. Increasing the flow rate of the cooling medium can increase the heat exchange coefficient, thereby improving the cooling effect to a certain extent.

[0085] When the analytical trend index of the product concentration is less than or equal to the preset trend threshold, it indicates that the temperature in the reaction process fluctuates beyond expectations. The temperature fluctuation in the reaction vessel can be reduced by increasing the stirring speed of the stirring device to fully mix the reactants.

[0086] Preferably, in some possible implementation methods of the present embodiment, the method for adjusting the operating speeds of the stirring structure and the cooling structure includes: taking the sum of the constant 1 and the reaction condition optimization coefficient as the adjustment coefficient at the current moment; judging whether the analytical trend index of the product concentration is greater than the preset trend threshold, if so, weighting the preset standard flow rate using the adjustment coefficient to obtain the optimized flow rate of the cooling medium in the cooling structure at the current moment; if not, weighting the preset standard rotation speed using the adjustment coefficient to obtain the optimized rotation speed of the stirring structure at the current moment; the optimized flow rate corresponding to the cooling structure is the operating speed of the cooling structure, and the optimized rotation speed of the stirring structure is the operating speed of the stirring structure.

[0087] If the structure adjusted at the current moment is a stirring structure, the optimized speed of the stirring structure in the time period between the current moment and the next moment when the structure adjusted is a stirring structure is set to the optimized flow rate at the current moment; the cooling structure adjustment method is the same and will not be introduced here. As an example, assuming that the structure adjusted at the tth moment is a stirring structure and the optimized speed is v_b t , the structure adjusted at time t+1 is a cooling structure and the optimized flow rate is v_w t+1 , the adjusted structure at time t+2 is a cooling structure and the optimized flow rate is v_w t+2 At time t+3, the adjusted structure is a stirring structure and the optimized speed is v_b t+3 , then the optimal speed of the stirring structure during the period from time t to time t+3 is v_b t The optimal flow rate of the cooling structure between the time period of time t+1 and time t+2 is v_w t+1 .

[0088] It should be noted that in this embodiment, the preset trend threshold is an empirical value of 0.6, which can be set by the implementer according to the specific situation. The stirring device in the adipic acid production and storage equipment starts stirring when the reactants start to react; the cooling structure starts to operate when the temperature in the reaction container in the adipic acid production and storage equipment exceeds a certain value. In this embodiment, the temperature value is 157 degrees Celsius, which can be set by the implementer according to the specific situation. The optimized rotation speed of the stirring structure and the optimized flow rate of the cooling structure are the operating speed.

[0089] If the concentration of the reactants at the current moment is less than the preset concentration limit value, it is considered that the reactants in the reaction container have fully reacted, the reaction is terminated, the stirring structure and the cooling structure stop running, and the material extraction module is used to extract adipic acid; if the concentration of the reactants at the current moment is greater than or equal to the preset concentration limit value, it is considered that the reactants in the reaction container have not yet fully reacted, and the reaction conditions in the production process of the adipic acid production and storage equipment need to be adjusted in real time according to the above method to maintain the stability of the reaction and ensure the quality of the product.

[0090] It should be noted that in this embodiment, the preset concentration limit value is set to half of the concentration of the reactants at the start of the reaction, and the implementer can set it according to the specific situation. In other embodiments, the conversion rate of the adipic acid production process greater than 80% can also be used as the stop condition of the reaction process, and the conversion rate of adipic acid at the current moment is the ratio of the amount of the product at the current moment to the amount of the reactants at the initial time, multiplied by 100%; other stop conditions can also be set, which are not limited here.

[0091] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An adipic acid production and storage device, characterized in that: The adipic acid production and storage equipment includes a reaction monitoring module, a reaction regulating module, a material extraction module and a reaction container, the reaction monitoring module includes a data acquisition module and a data analysis control chip, and the reaction regulating module includes a stirring structure and a cooling structure; The data acquisition module is connected to the signal input end of the data analysis control chip, and the signal output end of the data analysis control chip is connected to the reaction adjustment module; The data acquisition module is used to collect the temperature value set, pressure value, reactant concentration and product concentration of the reaction container at each moment in the monitoring time period in real time, and transmit them to the data analysis control chip; the end time of the monitoring time period is the current time; The data analysis control chip is used to obtain the temperature adjustment demand value according to the fluctuation degree of the temperature value and the mutation degree of the pressure value in the temperature value set at all times within the monitoring time period; According to the changing trend of the reactant concentration and the product concentration during the monitoring period, and the temperature adjustment demand value, the reaction condition optimization coefficient is obtained; the operation speed of the stirring structure and the cooling structure is adjusted in real time using the reaction condition optimization coefficient; until the reactant concentration at the current moment meets the stop condition, the stirring module and the cooling structure are stopped, and adipic acid is extracted using the substance extraction module.

2. The adipic acid production and storage equipment according to claim 1, characterized in that: The step of obtaining the temperature adjustment requirement value comprises: The temperature value set includes a first temperature value and a second temperature value, and one of the first temperature value and the second temperature value is selected as the analysis temperature value; the temperature promotion effect value is obtained according to the fluctuation degree of the analysis temperature value at all times in the monitoring time period and the difference between the first temperature value and the second temperature value; According to the difference between the pressure value at each moment in the monitoring time period and the pressure value at the moment in the preset adjacent window, the overall mutation value is obtained; A temperature regulation requirement value is obtained according to the temperature promotion effect value and the overall mutation value.

3. The adipic acid production and storage equipment according to claim 2, characterized in that: The step of obtaining the temperature promotion effect value comprises: Obtain the variance of the analysis temperature values ​​at all times in the monitoring time period and record it as a temperature fluctuation index; calculate the average of the absolute values ​​of the differences between the analysis temperature values ​​at all times in the monitoring time period and the expected constant temperature values ​​as a constant temperature difference index; According to the temperature fluctuation index and the constant temperature difference index, a temperature positive promotion value is obtained; the temperature fluctuation index and the constant temperature difference index are both negatively correlated with the temperature positive promotion value; Obtaining the concentrated value of the analyzed temperature values ​​at all times within the monitoring time period, and recording it as a temperature concentration index; taking the absolute value of the difference between the temperature concentration index of the first temperature value and the temperature concentration index of the second temperature value as a temperature difference value; The temperature promotion effect value is obtained according to the temperature difference value and the temperature positive promotion value; the temperature positive promotion value and the temperature promotion effect value are positively correlated, and the temperature difference value and the temperature promotion effect value are negatively correlated.

4. The adipic acid production and storage equipment according to claim 2, characterized in that: The obtaining of the temperature positive promotion value comprises: Calculate the cumulative sum of the differences between each moment and the pressure values ​​of the remaining moments in the preset adjacent window except each moment, and record the absolute value of the cumulative sum as the local mutation value of each moment; The average of the local mutation values ​​at all times within the monitoring time period is taken as the overall mutation value.

5. The adipic acid production and storage equipment according to claim 1, characterized in that: The step of obtaining the reaction condition optimization coefficient comprises: Record the reactant concentration and the product concentration as analytical concentration; obtain the correlation coefficient between the analytical concentrations corresponding to all moments in the monitoring period and record it as an analytical trend index; record the difference between the analytical trend index of the product concentration and the analytical trend index of the reactant concentration as a trend difference index; The product of the analytical trend index of the product concentration and the trend difference index is used as a reaction efficiency index; A reaction condition optimization coefficient is obtained according to the temperature adjustment requirement value and the reaction efficiency index.

6. The adipic acid production and storage equipment according to claim 5, characterized in that: The method of adjusting the operating speed of the stirring structure and the cooling structure in real time by using the reaction condition optimization coefficient includes: The cooling structure achieves cooling treatment by means of a cooling medium flowing through the interior of the structure; The sum of the constant 1 and the reaction condition optimization coefficient is used as the adjustment coefficient at the current moment; Determine whether the analysis trend index of the product concentration is greater than a preset trend threshold value. If so, weight the preset standard flow rate using the adjustment coefficient to obtain the optimized flow rate of the cooling medium in the cooling structure at the current moment; if not, weight the preset standard rotation speed using the adjustment coefficient to obtain the optimized rotation speed of the stirring structure at the current moment; The optimized flow rate corresponding to the cooling structure is the operating speed of the cooling structure, and the optimized rotation speed of the stirring structure is the operating speed of the stirring structure.

7. The adipic acid production and storage equipment according to claim 1, characterized in that: The reactant concentration at the current moment satisfies the stop condition when the reactant concentration at the current moment is less than a preset concentration limit value.

8. The adipic acid production and storage equipment according to claim 3, characterized in that: The central value is the mean value.

9. The adipic acid production and storage equipment according to claim 5, characterized in that: The correlation coefficient is the Pearson correlation coefficient.

10. The adipic acid production and storage equipment according to claim 2, characterized in that: The length of the preset adjacent window is 3.

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