Intelligent alcohol precipitation system

Abstract

The intelligent alcohol precipitation system can be widely applied to the fields of traditional Chinese medicine extraction, plant extraction, health product processing, raw material medicine preparation and the like, and can realize full-automatic control of the alcohol precipitation process of the liquid medicine, realizes full-automatic control of the alcohol precipitation process, solves technical problems such as accurate online detection of the ethanol concentration, online adjustment of the alcohol concentration of the alcohol precipitation liquid and accurate determination of the alcohol precipitation interface, and meanwhile, the system can store and analyze the operation parameters of the system, and track and predict the product quality and the health degree of the system. The system has good compatibility, can be widely popularized, reduces the manual labor, and improves the product quality between each batch.

Description

Technical Field

[0001] This invention relates to an intelligent alcohol precipitation system, which can be widely used in industries such as traditional Chinese medicine extraction, plant extraction, health product processing, and raw material drug preparation. Background Technology

[0002] Alcohol precipitation has wide applications in plant extraction, traditional Chinese medicine extraction, and health product preparation, with significant market demand and a substantial impact on product quality and efficacy. Traditional single-unit alcohol precipitation equipment relies on manual alcohol adjustment, with the supernatant interface entirely determined manually, leading to significant errors, low efficiency, and frequent waste of active ingredients and excessive energy consumption. The entire alcohol precipitation process suffers from the following problems:

[0003] 1. Low product yield due to human factors;

[0004] 2. The alcohol content of the drug solution needs to be measured and prepared manually, and online detection of the alcohol content of the drug solution is not possible;

[0005] 3. The interface between the supernatant and the drug solution cannot be detected automatically; the height of the interface needs to be determined manually through the viewing window.

[0006] 4. Standalone equipment operation lacks archival analysis of equipment operating status and production efficiency, and is deficient in product quality and system health analysis;

[0007] In recent years, with the development of industrial control and artificial intelligence, the requirements for control precision and response speed have increased, and the problems of existing control methods have become increasingly apparent. While control theory suggests using complex control algorithms to improve system performance and parameters, such as neural network algorithms and Kalman filtering, these methods incur significant system overhead in practical engineering. Existing mainstream industrial control equipment, especially PLCs, lacks strong portability and adaptability. These problems not only reduce system efficiency but also lead to energy waste and increased labor costs. Currently, the domestic industrial control industry lacks effective solutions to these problems in engineering practice. Summary of the Invention

[0008] This invention provides an intelligent alcohol precipitation system that integrates a discrete PID algorithm using the limited system resources of a PLC. By gaining a deep understanding of the process principle of the alcohol precipitation device and combining it with the actual production requirements on site, it realizes the fully automated functions of the alcohol precipitation section, from feeding, mixing, temperature control, precipitation, separation surface judgment and supernatant discharge.

[0009] This invention is implemented as follows:

[0010] An intelligent alcohol precipitation system is provided to control the alcohol precipitation process, including an alcohol precipitation tank and a control system. The alcohol precipitation tank is equipped with an ethanol flow transmitter, a chemical liquid flow transmitter, a temperature transmitter, a level transmitter, an internal pressure transmitter, a density transmitter, a relative permittivity transmitter, an outlet tuning fork switch, an ethanol inlet pneumatic valve, a chemical liquid inlet pneumatic valve, a cleaning pneumatic valve, an exhaust pneumatic valve, an outlet pneumatic valve, a circulating water inlet pneumatic regulating valve, a wastewater discharge pneumatic valve, a vacuum pump, a stirring motor, and a supernatant delivery pump. The control system includes a chemical liquid alcohol content calculation module, a self-correcting ethanol blending algorithm module, and an alcohol precipitation interface determination module.

[0011] 1. The alcohol precipitation process control specifically includes:

[0012] Liquid Inlet Section: After setting the process parameters, the intelligent alcohol precipitation system starts the intelligent control program, opens the vacuum pneumatic valve to establish a vacuum, and measures the amount of medicine and ethanol entering through the ethanol inlet pneumatic valve, the medicine inlet pneumatic valve, the ethanol flow transmitter, and the medicine flow transmitter. At the same time, the stirring motor is turned on to stir. When the liquid inlet reaches the set value and the alcohol content of the medicine calculated by the density transmitter reaches the set value, the ethanol inlet pneumatic valve, the medicine inlet pneumatic valve, and the vacuum pneumatic valve are closed. The air venting valve is opened to vent the air. After the pressure transmitter value in the tank returns to normal pressure, the air venting valve is closed, and the liquid inlet section ends.

[0013] Refrigeration section: Open the pneumatic regulating valve at the circulating water inlet to automatically adjust the inlet flow rate of the cooling circulating water. The entire alcohol precipitation system enters the refrigeration section. The system monitors the tank temperature in real time through a temperature transmitter. When the temperature drops to the set refrigeration temperature, the system enters the heat preservation stage and automatically times the time. When the system time exceeds the set heat preservation time, the refrigeration section ends and the system enters the liquid discharge section.

[0014] Liquid discharge section: The pneumatic valve for venting air is automatically opened. The dielectric constant of each height is calculated by the relative permittivity transmitter. The height between the current supernatant and the sediment is automatically calculated. After manual confirmation through the viewing window, the height of the liquid outlet in the tank is set, and liquid discharge is started on site. The system opens the side liquid discharge pneumatic valve and the supernatant delivery pump to discharge liquid to the downstream equipment. When the liquid discharge tuning fork switch no longer measures a signal, the liquid discharge ends.

[0015] Cleaning section: After the liquid discharge is completed, the system automatically enters the cleaning section, opens the sewage discharge pneumatic valve to discharge the residue, and at the same time opens the cleaning pneumatic valve to automatically spray the inside of the equipment. After the set time is reached, the system automatically stops and enters standby mode.

[0016] 2. The real-time monitoring module for alcohol precipitation solution density uses a density transmitter to measure the online density of the current alcohol precipitation mixture and a temperature transmitter to measure the temperature of the alcohol precipitation solution. It automatically calculates the current ethanol concentration of the alcohol precipitation mixture, quickly finds the interval of percentage concentration corresponding to the current density using a binary search method, and calculates the current percentage concentration of the alcohol precipitation mixture using linear interpolation.

[0017] 3. The self-correcting ethanol blending module adds ethanol in three stages based on the set ethanol blending endpoint volume concentration and volume: the first stage adds 80% of the total ethanol volume to be blended, and then calculates the volume concentration of the precipitate; the second stage adds 90% of the recalculated ethanol volume, and then calculates the volume concentration of the precipitate; the third stage calculates the remaining ethanol volume based on the latest volume concentration, adds it all at once, and then calculates the volume concentration of the precipitate.

[0018] 4. The module for determining the alcohol precipitation interface calculates the capacitance ratio of adjacent points. Since the dielectric constant ε of two adjacent measuring points at the interface between the supernatant and the precipitate is not the same, the interface between the supernatant and the precipitate is calculated.

[0019] 5. It also includes a data integration and analysis module, which archives the system's process and operating parameters, establishes equipment operation health records, and analyzes and provides early warnings on product quality and system health.

[0020] The inventiveness of this invention lies in:

[0021] A universal and compatible system platform has been built, which can be used with all alcohol precipitation tanks on the market to achieve intelligent control of the alcohol precipitation process; the density of the alcohol precipitation solution is monitored in real time, and the alcohol concentration of the current alcohol precipitation solution is quickly calculated by using binary and linear interpolation algorithms and temperature correction; the feed rate and ethanol concentration of the alcohol precipitation section are precisely controlled with an accuracy range of ±0.5%; the interface between air, supernatant and precipitate in the alcohol precipitation solution is automatically detected by capacitance method; the process and operating parameters of the system are archived, equipment operation health records are established, and product quality and system health are analyzed and early warning are provided.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] This invention discloses an intelligent alcohol precipitation system, which can be widely applied in industries such as traditional Chinese medicine extraction, plant extraction, health product processing, and raw material drug preparation. This system enables fully automated control of the alcohol precipitation process, solving technical challenges such as accurate online detection of ethanol concentration, online adjustment of the alcohol concentration of the precipitation solution, and precise determination of the alcohol precipitation interface. Furthermore, the system can store and analyze operating parameters, tracking and predicting product quality and system health. This system has good compatibility, can be widely promoted, reduces manual labor, and improves product quality between batches. Attached Figure Description

[0024] Figure 1 This is a diagram of an intelligent alcohol precipitation system architecture;

[0025] Figure 2 A diagram illustrating a binary and linear interpolation algorithm for calculating the alcohol content of a pharmaceutical solution in an intelligent alcohol precipitation system.

[0026] Figure 3 A diagram of a self-correcting ethanol blending algorithm for an intelligent alcohol precipitation system;

[0027] Figure 4 This is a schematic diagram of a smart alcohol precipitation system using the capacitance method to measure the interface of the supernatant. Detailed Implementation

[0028] 1: System framework and hardware / software configuration

[0029] A configuration diagram of an intelligent alcohol precipitation system according to the present invention is shown below. Figure 1 As can be seen, the entire system includes a general-purpose alcohol precipitation tank C01, and the sensors and actuators used are listed in Table 1. The signals from the field instruments and actuators are connected to the field control cabinet C02 via field cable L01. The field control cabinet C02 is equipped with a touch screen for convenient on-site operation. The server C03 is directly connected to the control cabinet C02 via communication cable L02 to complete data communication and acquisition.

[0030]

[0031]

[0032] Table 1: System Equipment List

[0033] The control system is configured as follows:

[0034] In field control cabinet C02, a Siemens 1515-1PN PLC is used, equipped with a 12MB program memory card. The system control communication adopts the Profibus-Net network protocol and is equipped with a KTP1200 touch screen. Server C03 uses a DELL general desktop computer with Windows Win10 SP1 operating system. The software platform uses Siemens industrial control software packages, including the lower-level programming software TIA Portal V16 and the human-machine interface programming software WinCC 7.4.

[0035] 2: Control of alcohol precipitation process

[0036] Liquid Inlet Section: After setting the process parameters, the intelligent alcohol precipitation system starts the intelligent control program, opens the vacuum valve AS08 to establish a vacuum, and measures the amount of medicine and ethanol entering through the ethanol valve AS01, the medicine valve AS02, and the flow meters FT01 and FT02. At the same time, the stirring motor M01 is turned on for stirring. When the liquid inlet reaches the set value and the alcohol content of the medicine solution calculated by the density meter AIT01 reaches the set value, AS01, AS02, and AS08 are closed, AS04 is opened to vent, and after the pressure in the tank PT01 returns to normal pressure, AS04 is closed, and the liquid inlet section ends.

[0037] Refrigeration section: Open the pneumatic regulating valve AS06 to automatically adjust the inlet flow rate of the cooling circulating water. The entire alcohol precipitation system enters the refrigeration section. The system monitors the tank temperature in real time through TE01. When the temperature drops to the set refrigeration temperature, the system enters the heat preservation stage and automatically times the time. When the system time exceeds the set heat preservation time, the refrigeration section ends and enters the liquid discharge section.

[0038] Liquid discharge section: The system automatically opens the drain valve AS04, calculates the dielectric constant at each height through AIT02, automatically calculates the height between the current supernatant and the sediment, and after manual confirmation through the viewing window, sets the height of the liquid outlet in the tank. Liquid discharge is then started on-site, and the system opens the side liquid outlet valve AS05 and the transfer pump P01 to discharge liquid to the downstream equipment. Liquid discharge ends when the tuning fork switch LS01 no longer measures a signal.

[0039] Cleaning Section: After the liquid discharge is completed, the system automatically enters the cleaning section, opens the drain valve AS07 to discharge the residue, and at the same time opens the cleaning valve AS03 to automatically spray the inside of the equipment. After the set time is reached, the system automatically stops and enters standby mode.

[0040] 3: Calculation of alcohol content of the drug solution using binary and linear interpolation

[0041] The intelligent alcohol precipitation system can automatically calculate the ethanol concentration of the current alcohol precipitation mixture based on its online density (AIT01) and temperature (TE01). It uses a binary search method to quickly find the concentration range corresponding to the current density, and then employs linear interpolation to calculate the current percentage concentration of the alcohol precipitation mixture. This binary search significantly reduces the time required to look up concentration and density conversion tables, lowers the system load, and increases response time.

[0042] Figure 2 The flowchart for the binary search and linear interpolation procedure is shown below. Taking an ethanol solution with a precipitation temperature of 19℃, a volume concentration of 66.7%, and a mass density of 893.61 kg / m³ as an example, the algorithm's calculation process is explained. Since the density and volumetric alcohol content of the ethanol solution are temperature-dependent, and the TE01 measurement value is 19℃, a table of density and alcohol content corresponding to ethanol solutions at 20℃ is used for calculation (the algorithm's preset reference temperatures for the density and alcohol content table are 20℃, 30℃, 40℃, and 50℃, with each table representing a volume concentration range of 31% to 95%). The measured density AIT01 is compared with the density at a known volume concentration, and the binary search method is used for step-by-step comparison. Finally, the measured density is defined within a known concentration range.

[0043] First, compare the value of AIT01 with the density of a standard ethanol solution at 63%. If it is less than that, the corresponding alcohol content is between 63% and 95%.

[0044] Next, compare the value of AIT01 with the density of a standard ethanol solution at 79%. If it is greater, the corresponding alcohol content is between 63% and 79%.

[0045] Next, compare the value of AIT01 with the density of a standard ethanol solution at 71%. If it is greater, the corresponding alcohol content is between 63% and 71%.

[0046] Next, compare the value of AIT01 with the density of 67% of the standard ethanol solution. If it is greater, the corresponding alcohol content is between 63% and 67%.

[0047] Next, compare the value of AIT01 with the density of a standard ethanol solution at 65%. If it is less than that, the corresponding alcohol content is between 65% and 67%.

[0048] Next, compare the value of AIT01 with the density of 66% of the standard ethanol solution. If it is less than that, the corresponding alcohol content is between 66% and 67%.

[0049] Therefore, we can determine that the volume concentration corresponding to the density we measured should be between 66% and 67%.

[0050] A linear interpolation method was used to obtain the concentration value corresponding to the measured density. The specific density-to-concentration conversion formula is as follows:

[0051]

[0052] Where a0% represents the actual volume concentration of the liquid being tested; a0 represents the measured density value of the liquid being tested; a1 represents the lower limit of the density corresponding to the defined concentration; a2 represents the upper limit of the density corresponding to the defined concentration; and a1% represents the volume concentration of the lower limit of the defined density. Based on the above deductions, a0 = 893.61, a1 is the density value at 20℃ with a volume concentration of 67%, and by using the bisection method to look up the table, a1 = 892.89; a2 is the density value at 20℃ with a volume concentration of 66%, and by using the bisection method to look up the table, a2 = 895.28. Substituting these values ​​into the formula, the current volume concentration is calculated as follows:

[0053]

[0054] It is clear that the calculated volume concentration is correct.

[0055] 4: Self-correcting ethanol blending algorithm

[0056] After starting the ethanol preparation process of the ethanol precipitate, the system initiates a self-correcting ethanol preparation algorithm. For the detailed algorithm flow, please refer to [link / reference needed]. Figure 3 A diagram illustrating a self-correcting ethanol blending algorithm for an intelligent ethanol precipitation system. The entire ethanol blending process is completed in three stages. First, the total volume of ethanol to be blended, V1, is initially calculated according to process requirements. AS01 is activated, and the volume of fresh ethanol added is measured using FT01. When the volume of the initially added ethanol reaches 80% of V1, AS01 is deactivated. At this point, a binary and linear interpolation algorithm is used to calculate the alcohol concentration of the precipitate and correct the calculated volume of ethanol needed, V2. After correction, AS01 is activated again, and the volume of fresh ethanol added, V2, is measured using FT01. When the volume of the initially added ethanol reaches 90% of V2, AS01 is deactivated. At this point, a binary and linear interpolation algorithm is used to calculate the alcohol concentration of the precipitate and calculate the second corrected volume of ethanol, V3. After correction, AS01 is activated again, and the volume of fresh ethanol added, V3, is measured using FT01. When the volume of the initially added ethanol reaches V3, AS01 is deactivated, and the ethanol blending process is stopped.

[0057] 5: Capacitance method for measuring the interface of supernatant

[0058] A capacitive transmitter AIT02 is inserted into the top of the alcohol precipitation tank C01, with the structure as follows: Figure 4As shown, the AIT02 contains 25 probes. Each probe, the alcohol precipitation tank body, and the alcohol precipitation solution constitute a capacitor. The probe is one electrode of the capacitor, the alcohol precipitation tank body is the other electrode, and the alcohol precipitation solution is the medium between the two electrodes. As the liquid level changes, the area of ​​the probe surrounded by the measured medium changes, causing a change in the relative area of ​​the two electrodes, resulting in a change in the capacitance value C. The formula for calculating the capacitance value C is as follows:

[0059] Where ε is the dielectric constant, S is the area between the two electrodes of the capacitor, K is the electrostatic constant, and d is the distance between the two electrodes of the capacitor.

[0060] The area S between the two electrodes of the capacitor is the liquid level height × the circumference of the inner tank of the alcohol precipitation tank, that is, S = 2πRL, where L is the liquid level height.

[0061]

[0062] In the calculation, after inserting AIT02 into the bottom of the tank, the distance between the end and the bottom is negligible. The 25 capacitive probes are arranged at equal intervals. Let the distance from the first measuring point (bottom to top) to the bottom of the tank be D, the measured capacitance value be C1, the liquid level height be L1 = D, and the dielectric constant be ε1; let the distance from the second measuring point be 2D, the measured capacitance value be C2, the liquid level height be L2 = 2D, and the dielectric constant be ε2; then the distance from the Nth measuring point to the bottom of the tank is nD, the measured capacitance value is Cn, the liquid level height be Ln = nD, and the dielectric constant be ε. n Therefore, we can conclude that:

[0063]

[0064] Further, we can obtain

[0065]

[0066] In the alcohol precipitation solution after settling, the supernatant and precipitate are clearly separated into layers, and since the dielectric constant ε is the same for the same medium, then:

[0067]

[0068] It can be seen that the dielectric constant ε at two adjacent measuring points at the interface between the supernatant and the precipitate is not the same, so the following results are obtained:

[0069]

[0070] The current interface between the supernatant and the precipitate is located between measuring points Cn and Cn+1.

[0071] After the AIT02 system measures the capacitance value Cn at 25 points, it calculates the ratio of the capacitance values ​​of two adjacent points and compares it with the reference value n / n+1 to determine the actual interface between the supernatant and the precipitate.

[0072] 6: Data Integration and Analysis

[0073] This system enables fully automated data acquisition and analysis of the production process, archives system process and operating parameters, establishes equipment health records, and analyzes and provides early warnings for product quality and system health. The system uses a database to record information throughout the entire product production process, including equipment operating information, alarm information manually entered by operators during fault alarms, and operating parameter information of the automated system, facilitating analysis and use.

[0074] This data recording system has the following functions:

[0075] • Establish production process record archiving

[0076] 1) The automated system will continuously record key parameters of the alcohol precipitation system during operation, including but not limited to alcohol precipitation tank temperature, equipment internal pressure, alcohol precipitation liquid density, circulating water temperature, etc.

[0077] 2) Record and archive the operator's operating procedures;

[0078] 3) Periodically record and archive the current environmental parameters within the workshop;

[0079] 4) Alarm recording and archiving of automated systems;

[0080] 5) Energy consumption of steam, electricity, and circulating water in a single production run;

[0081] • Establish equipment operation status archives, predict equipment health levels, and send alerts for equipment malfunctions to facilitate maintenance.

[0082] 1) When the equipment is run for the first time each workday, the operator will be required to enter the equipment status information and record the equipment status;

[0083] 2) Record the start-up and shutdown times of the equipment and the time of each work session. When 5 production records are accumulated, analyze the production time data.

[0084] The first five production runs took time t0, t1, t2, t3, and t4.

[0085] If the following conditions are met, production will continue and the data will be updated and overwritten sequentially; otherwise, the operator will be reminded to check the equipment.

[0086]

[0087] 3) When equipment malfunctions or alarms, record the key production operation parameters at the time of the fault, and analyze the correlation between equipment parameters and alarms when similar alarms occur;

[0088] 4) The system can be set to time maintenance cycles, reminding operators to perform equipment maintenance when the maintenance time is approaching;

[0089] 5) After collecting the five most recent alarm or maintenance information, calculate the current mean time between failures (MTBF) T0 based on the equipment's operating status, and analyze this time to derive the recommended maintenance cycle T. m ;

[0090]

[0091] • Real-time monitoring of alcohol precipitation solution parameters

[0092] 1) The system supports online querying of key parameters for alcohol precipitation and can display real-time solution parameters.

[0093] 2) Supports historical record querying and generation of statistical charts.

[0094] This invention system possesses excellent portability and stability, making it suitable for various application scenarios requiring different alcohol precipitation processes, and allowing for rapid deployment. By measuring the density of the alcohol precipitate and using temperature correction, an ethanol concentration-density conversion table applicable to the current operating conditions is determined. A binary and linear interpolation algorithm is employed to quickly determine the alcohol concentration range of the current density, and linear interpolation is used to calculate the ethanol concentration of the current precipitate. A self-correcting ethanol mixing algorithm is used, adding ethanol in three stages based on a set endpoint volume concentration and volume: the first stage adds 80% of the total required ethanol volume, and the volume concentration of the precipitate is calculated afterward; the second stage adds 90% of the recalculated ethanol volume, and the final volume concentration is calculated. The volume concentration of the precipitate is calculated after the first step. A third calculation is performed based on the latest volume concentration to determine the required ethanol volume, which is then added in one go. The volume concentration of the precipitate is calculated again after the first step. The capacitance values ​​at equal points in the precipitate tank are measured, and the capacitance ratio between adjacent points is calculated to determine the interface between the supernatant and the precipitate. The system achieves fully automated data acquisition and analysis, archives the system's process and operating parameters, establishes equipment health records, and analyzes and provides early warnings for product quality and system health. The system is relatively simple to implement, utilizing the limited resources of the PLC to achieve a high-precision control algorithm, balancing system overhead and performance. The system operates stably, exhibits good control curves, and has a user-friendly human-machine interface.

[0095] This invention can be widely applied in industries such as traditional Chinese medicine extraction, plant extraction, health product processing, and raw material preparation. It integrates efficient and stable algorithms using the limited system resources of a PLC. Through in-depth understanding of the process principles of alcohol precipitation devices and combined with actual on-site production requirements, it achieves fully automated functions in the alcohol precipitation section, from feeding, alcohol content detection, alcohol content adjustment, temperature control, precipitation, supernatant-precipitate interface judgment, and supernatant discharge. A universal and compatible system platform has been developed and constructed, compatible with all alcohol precipitation tanks on the market, realizing intelligent control of the entire alcohol precipitation process. The system has good portability and stability, suitable for various application scenarios requiring alcohol precipitation processes, and can be quickly deployed and implemented.

Claims

1. A smart alcohol precipitation system, characterized in that, It can realize the control of the alcohol precipitation process, including an alcohol precipitation tank and a control system; the alcohol precipitation tank is equipped with an ethanol flow transmitter, a drug flow transmitter, a temperature transmitter, a level transmitter, an internal pressure transmitter, a density transmitter, a relative permittivity transmitter, an outlet tuning fork switch, an ethanol inlet pneumatic valve, a drug inlet pneumatic valve, a cleaning pneumatic valve, an exhaust pneumatic valve, an outlet pneumatic valve, a circulating water inlet pneumatic regulating valve, a sewage discharge pneumatic valve, a vacuum pump, a stirring motor, and a supernatant transfer pump; the control system includes a drug concentration calculation module, a self-correcting ethanol blending algorithm module, and an alcohol precipitation interface determination module. The alcohol concentration calculation module automatically calculates the ethanol concentration of the current alcohol precipitation mixture by using the online density of the current alcohol precipitation mixture measured by the density transmitter and the temperature of the alcohol precipitation mixture measured by the temperature transmitter. It quickly finds the range of percentage concentration corresponding to the current density by using a binary search method and calculates the percentage concentration of the current alcohol precipitation mixture by using a linear interpolation method. The self-correcting ethanol blending algorithm module adds ethanol in three stages based on the set endpoint volume concentration and volume: the first stage adds 80% of the total ethanol volume to be blended, and then calculates the volume concentration of the precipitate; the second stage adds 90% of the recalculated ethanol volume, and then calculates the volume concentration of the precipitate; the third stage calculates the remaining ethanol volume based on the latest volume concentration, adds it all at once, and then calculates the volume concentration of the precipitate. The module for determining the alcohol precipitation interface calculates the capacitance ratio of adjacent points. It uses the fact that the dielectric constant ε of two adjacent measuring points at the interface between the supernatant and the precipitate is different to calculate the interface between the supernatant and the precipitate.

2. The intelligent alcohol precipitation system according to claim 1, characterized in that, The alcohol precipitation process control specifically includes: Liquid Inlet Section: After setting the process parameters, the intelligent alcohol precipitation system starts the intelligent control program, opens the vacuum pneumatic valve to establish a vacuum, and measures the amount of medicine and ethanol entering through the ethanol inlet pneumatic valve, the medicine inlet pneumatic valve, the ethanol flow transmitter, and the medicine flow transmitter. At the same time, the stirring motor is turned on to stir. When the liquid inlet reaches the set value and the alcohol content of the medicine calculated by the density transmitter reaches the set value, the ethanol inlet pneumatic valve, the medicine inlet pneumatic valve, and the vacuum pneumatic valve are closed, and the air venting pneumatic valve is opened to vent. After the pressure transmitter value in the tank returns to normal pressure, the air venting pneumatic valve is closed, and the liquid inlet section ends. Refrigeration section: Open the pneumatic regulating valve at the circulating water inlet to automatically adjust the inlet flow rate of the cooling circulating water. The entire alcohol precipitation system enters the refrigeration section. The system monitors the tank temperature in real time through a temperature transmitter. When the temperature drops to the set refrigeration temperature, the system enters the heat preservation stage and automatically times the time. When the system time exceeds the set heat preservation time, the refrigeration section ends and the system enters the liquid discharge section. Liquid discharge section: The pneumatic valve for venting air is automatically opened. The dielectric constant of each height is calculated by the relative permittivity transmitter. The height between the current supernatant and the sediment is automatically calculated. After manual confirmation through the viewing window, the height of the liquid outlet in the tank is set, and liquid discharge is started on site. The system opens the side liquid discharge pneumatic valve and the supernatant delivery pump to discharge liquid to the downstream equipment. When the liquid discharge tuning fork switch no longer measures a signal, the liquid discharge ends. Cleaning section: After the liquid discharge is completed, the system automatically enters the cleaning section, opens the sewage discharge pneumatic valve to discharge the residue, and at the same time opens the cleaning pneumatic valve to automatically spray the inside of the equipment. After the set time is reached, the system automatically stops and enters standby mode.

3. The intelligent alcohol precipitation system according to claim 1, characterized in that, It also includes a data integration and analysis module, which archives the system's process and operating parameters, establishes equipment operation health records, and analyzes and provides early warnings on product quality and system health.

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