Colorless tea drink preparation system with pressure correction and temperature control functions
By designing a colorless tea beverage preparation system with pressure correction temperature control, using real-time monitoring and automatic adjustment technology, the problem that traditional distillation methods cannot achieve the best separation effect is solved, and efficient, stable and high-quality colorless tea beverage production is achieved.
Patent Information
- Application Number
- CN202411698815.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-03-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The traditional colorless tea distillation method adopts fixed operating pressure and temperature, and cannot achieve the best separation effect when treating different types of tea or tea drinks with different requirements, resulting in incomplete separation of ingredients or loss of active ingredients.
A colorless tea beverage preparation system with pressure correction temperature control was designed. By monitoring the temperature and pressure in the distillation tower in real time, the boiling point temperature under different pressures is calculated using the Claucius-Claperon equation, and the heating temperature is automatically adjusted through the PID controller to ensure distillation at the optimal temperature.
It has achieved the improvement of distillation efficiency, ensured product quality, enhanced system stability and reliability, reduced energy waste, accelerated distillation speed, ensured the correct extraction and separation of effective ingredients in colorless tea drinks, and improved the purity and quality of the product.
Smart Images
Figure CN119601110A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of food processing, in particular to a colorless tea preparation system with pressure correction and temperature control. Background Art
[0002] In the preparation process of colorless tea, removing color and other unwanted components from tea leaves through distillation technology is a key technology. The core of this process lies in the precise control of temperature and pressure in the distillation tower, because these parameters directly affect the distillation efficiency and the quality of the final product. Traditional distillation methods often use fixed operating pressure and temperature. This method may not achieve the best separation effect when dealing with different types of tea or tea drinks with different requirements, resulting in incomplete separation of components or loss of effective ingredients. Summary of the invention
[0003] The purpose of the present invention is to provide a colorless tea preparation system with pressure correction and temperature control, which can improve the distillation efficiency, ensure product quality and enhance the stability and reliability of the system by accurately controlling the key parameters in the distillation process.
[0004] The purpose of the present invention can be achieved through the following technical solutions: The present application provides a colorless tea preparation system with pressure correction and temperature control, including a raw material distillation module, a parameter monitoring module, a data processing module, a temperature control module and a main control module connected in communication. The raw material distillation module is used to distill the raw materials for colorless tea drinks and separate the raw materials into different components by heating them; Parameter monitoring module, used to monitor the temperature and pressure of each position of the raw material distillation module in real time; A data processing module is used to obtain different boiling points of liquids under different pressures, calculate based on the temperature and pressure data obtained at various positions in the parameter monitoring module, determine the actual temperature and perform correction to obtain a corrected temperature; The different boiling points of the liquid under different pressures are obtained by describing the relationship between temperature and pressure during phase change through the Clausius-Clapeyron equation to obtain the boiling point temperature under different pressures. The specific Clausius-Clapeyron equation is: , where P represents pressure; T represents absolute temperature (unit: Kelvin K); It represents the heat of evaporation, that is, the amount of heat absorbed or released when 1 mole of liquid turns into gas. It represents the difference between the molar volumes of liquid and gas; The temperature control module calculates the difference between the correction temperature and the preset target value according to the correction temperature obtained by the data processing module, and automatically adjusts the heating temperature; The main control module is used to control the temperature and pressure during the preparation of colorless tea.
[0005] Furthermore, the separation of the processed raw materials into different components specifically includes separation into a first component and a second component; wherein the first component contains tea polyphenols, and the second component does not contain tea polyphenols.
[0006] Furthermore, the temperature and pressure data obtained at each position in the parameter monitoring module are calculated to determine the actual temperature and perform correction to obtain the corrected temperature. The specific correction formula is expressed as: Specifically expressed as: , in, is the correction temperature; is the actual measured temperature, P is the current pressure, is the standard pressure, k is an empirical constant determined according to the physical properties of the substance, which reflects the effect of pressure changes on the boiling point.
[0007] Furthermore, according to the correction temperature obtained by the data processing module, the difference between the correction temperature and the preset target value is calculated, and before the heating temperature is automatically adjusted, the method further includes: Construct a dynamic simulation model by simulating the dynamic changes of the distillation process and continuously modify the model through real-time data input.
[0008] Furthermore, the difference between the calculated correction temperature and the preset target value is specifically expressed as: ,in, is the preset target value, this difference value Indicates the deviation between the current correction temperature and the ideal target temperature. The preset target temperature is the ideal temperature set according to the process requirements during the distillation process. It is determined based on experimental data to ensure distillation efficiency and product quality.
[0009] Among them, if If it is a positive value, it means that the actual temperature is lower than the target temperature, and heating needs to be increased; if A negative value indicates that the actual temperature is higher than the target temperature, and it is necessary to reduce heating or increase cooling.
[0010] Furthermore, according to the obtained difference value, the heating temperature is automatically adjusted by the PID controller. Specifically, the difference value Converted into an adjustment command for the actual heating temperature, the expected temperature adjustment strength is determined based on the historical difference value accumulation (integral control part) and the current difference value (proportional control part). The PID controller includes: The proportional control part is based on the current difference value , directly adjust the heating power to make the current temperature close to the target temperature, expressed as: ,in, Is the proportional gain coefficient, used to adjust the difference value The degree of response to heating temperature; The integral control part is the accumulation of historical difference values, which is the output value reaching the target value. It is specifically expressed as: ,in is the integral gain coefficient; The differential control part is used to predict the changing trend of the difference value by calculating the rate of change of the difference value to avoid fluctuations caused by excessive adjustment. It is specifically expressed as: ,in represents the differential gain coefficient, dt represents the time increment; The output signal of the PID controller will gradually adjust the power of the heater according to the changing trend of the difference value, thereby changing the heating temperature.
[0011] Furthermore, a pressure-corrected temperature-controlled colorless tea beverage preparation system also includes a distillation detection module, which detects the proportion of components separated during the distillation process in real time and feeds the data back to the main control module; Among them, gas chromatography technology is used to conduct online detection of the components of each fraction and adjust the distillation conditions in real time.
[0012] Furthermore, the gas chromatography technology specifically includes: A sample of the raw material for processing the colorless tea drink is collected and introduced into a gas chromatograph through an injection port for distillation, and the evaporated sample is sent into a chromatographic column for separation using a carrier gas; wherein the chromatographic column is coated with a stationary phase, and the evaporated compound of the sample and the stationary phase pass through the chromatographic column at different rates, and the carrier gas includes helium or nitrogen; Further, the migration velocity of the compound in the chromatographic column is expressed as: , Where v is the migration velocity of the compound, F is the flow rate of the carrier gas, is the retention time of the compound, is the base time and W is the peak width.
[0013] Furthermore, the gas chromatography technique is used to detect the components of each fraction online and adjust the distillation conditions in real time, specifically including: After the compound flows out of the chromatographic column, it enters the detector, where it is detected by burning the compound and measuring the generated ions. The compound response value generated by the detector reflects the sensitivity of the compound. The specific compound response value is expressed as: , Where R is the response value of the detector, C is the response factor, and m is the mass of the compound entering the detector per unit time; A chromatogram of the compound is generated based on the electrical signal produced by the detector. The distillation process is monitored and the distillation conditions are adjusted through the chromatogram to optimize the production process.
[0014] The beneficial effects of the present invention are: The present invention monitors the temperature and pressure in the raw material distillation module in real time, and uses the data processing module to calculate the boiling point temperature under different pressures according to the Clausius-Clapeyron equation. The system can dynamically adjust the heating temperature to ensure that distillation is performed at the optimal temperature. The precise temperature control reduces energy waste and speeds up the distillation speed, thereby improving the overall production efficiency. At the same time, it also helps to extend the service life of the equipment by reducing the situation of overheating or underheating. By building a dynamic simulation model to simulate the distillation process and constantly modifying the model based on real-time data, we can ensure the optimization of distillation conditions. We use gas chromatography technology to detect the components of each fraction online and adjust the distillation conditions in real time to ensure the correct extraction and separation of the active ingredients in the colorless tea drink, avoid unnecessary chemical reactions or decomposition, and thus ensure the purity and quality of the final product. The PID controller is used to automatically adjust the heating temperature. Combined with proportional control, integral control and differential control, the system can respond smoothly to temperature changes and avoid fluctuations caused by over-adjustment. The sophisticated control strategy not only improves the stability of the production process, but also reduces the possibility of human operating errors, enhances the reliability of the system, helps reduce maintenance costs and improves production continuity. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] For better understanding and implementation, the technical solution of the present application is described in detail below with reference to the accompanying drawings.
[0016] Figure 1 A schematic diagram of the structure of a colorless tea preparation system with pressure correction and temperature control provided in Example 1 of the present application; Figure 2 A schematic diagram of a process of automatically adjusting the heating temperature through a PID controller in a colorless tea preparation system with pressure correction temperature control provided in Example 1 of the present application; Figure 3 A schematic flow chart of a pressure-corrected temperature-controlled colorless tea preparation system using gas chromatography technology provided in Example 1 of the present application; Figure 4 A schematic flow chart of a pressure-corrected temperature-controlled colorless tea preparation system for online detection of components of each fraction and real-time adjustment of distillation conditions provided in Example 1 of the present application. DETAILED DESCRIPTION
[0017] In order to further explain the technical means and effects taken by the present invention to achieve the predetermined invention purpose, exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of methods and systems consistent with some aspects of the present application as detailed in the attached claims.
[0018] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0019] The specific implementation methods, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0020] Example 1 See also Figure 1-Figure 4 This embodiment provides a colorless tea preparation system with pressure correction and temperature control, which improves the distillation efficiency, ensures product quality, and enhances system stability and reliability by accurately controlling key parameters in the distillation process.
[0021] The present invention provides a colorless tea preparation system with pressure correction and temperature control, comprising a raw material distillation module, a parameter monitoring module, a data processing module, a temperature control module and a main control module connected in communication. The raw material distillation module is used to distill the raw materials for colorless tea drinks and separate the raw materials into different components by heating them; Parameter monitoring module, used to monitor the temperature and pressure of each position of the raw material distillation module in real time; A data processing module is used to obtain different boiling points of liquids under different pressures, calculate based on the temperature and pressure data obtained at various positions in the parameter monitoring module, determine the actual temperature and perform correction to obtain a corrected temperature; The temperature control module calculates the difference between the correction temperature and the preset target value according to the correction temperature obtained by the data processing module, and automatically adjusts the heating temperature; The main control module is used to control the temperature and pressure during the preparation of colorless tea.
[0022] Among them, the corrected actual temperature refers to the real temperature reached by the raw material during the distillation process under the current pressure conditions. Since changes in pressure will affect the boiling point, the data processing module will adjust the measured temperature value based on the real-time pressure at each location to reflect the precise temperature under that pressure.
[0023] The reason for comparing the corrected temperature with the preset target temperature is that the preset target temperature is determined based on ideal conditions (usually under standard atmospheric pressure), and in the actual distillation process, the temperature will deviate due to changes in pressure. By comparing the actual temperature after correction with the preset target temperature, the system can determine whether the current temperature has reached the ideal range. If there is a difference, the temperature control module can automatically adjust the heating temperature to ensure that the entire distillation process runs towards the ideal state and stably obtains the expected component separation effect.
[0024] Furthermore, the separation of the processed raw materials into different components specifically includes separation into a first component and a second component; wherein the first component contains tea polyphenols, and the second component does not contain tea polyphenols.
[0025] The specific process of the raw material distillation module is: selecting raw materials suitable for making colorless tea, such as specific tea varieties, and washing and pre-treating the raw materials to ensure that impurities and foreign matter are removed; Raw material loading: loading the pre-treated raw materials into the distillation equipment; Heating: The distillation equipment loaded with raw materials is heated by the heating system; Component separation: As the heating progresses, the water and volatile components in the raw materials begin to evaporate. Due to the different boiling points of different components, the water and volatile components will evaporate at different temperatures. During the distillation process, the lighter components (such as aroma substances and certain flavor compounds) evaporate first, while the heavier components (such as tea polyphenols and caffeine) evaporate at a higher temperature; Condensation and collection: The evaporated steam is condensed through a condenser to convert the steam back into liquid. The condensate is collected into different fractions according to its composition and boiling point, specifically including a first component and a second component. The first component is rich in tea polyphenols, while the second component does not contain tea polyphenols.
[0026] Through the distillation process, the colorless tea preparation system is able to extract pure colorless tea ingredients from the raw materials while retaining its unique flavor and aroma, ultimately producing high-quality colorless tea products.
[0027] Furthermore, the different boiling points of the liquid under different pressures are obtained by describing the relationship between temperature and pressure during phase change through the Clausius-Clapeyron equation to obtain the boiling point temperature under different pressures. The specific Clausius-Clapeyron equation is: , where P represents pressure; T represents absolute temperature (unit: Kelvin K); It represents the heat of evaporation, that is, the amount of heat absorbed or released when 1 mole of liquid turns into gas. It represents the difference between the molar volumes of liquid and gas.
[0028] Specifically, the Clausius-Clapeyron equation explains that during the phase change process, the rate of change of pressure with temperature is related to the heat of evaporation and volume change. In practical applications, the Clausius-Clapeyron equation can be used to calculate the boiling point of a liquid at a specific pressure. In the colorless tea preparation system, the data processing module uses this principle and combines the real-time monitored pressure and temperature data to accurately correct the temperature during the distillation process to ensure the best distillation effect. The data processing module uses the Clausius-Clapeyron equation to predict the boiling point based on the real-time monitored pressure value and corrects the temperature reading accordingly. In this way, even when the pressure changes, the system can maintain precise control of the distillation process, thereby ensuring the extraction of high-quality colorless tea components.
[0029] The boiling point temperature at different pressures is obtained through the Clausius-Clapeyron equation; Furthermore, the temperature and pressure data obtained at each position in the parameter monitoring module are calculated to determine the actual temperature and perform correction to obtain the corrected temperature. The specific correction formula is expressed as: Specifically expressed as: , in, is the correction temperature; is the actual measured temperature, P is the current pressure, is the standard pressure, k is an empirical constant determined according to the physical properties of the substance, which reflects the effect of pressure changes on the boiling point.
[0030] Specifically, the purpose of the correction formula is to adjust the temperature measurement deviation caused by pressure changes. During the correction process, the data processing module will use this formula to calculate the true boiling point of the liquid at the current pressure. This correction temperature It will be used to control the distillation process to ensure that the desired distillation effect is achieved even when the pressure changes. In practical applications, the empirical constant k can be obtained by fitting the experimental data. This correction process is crucial for accurately controlling the temperature in the distillation tower, especially in the colorless tea preparation system, to ensure the effective separation and extraction of different components.
[0031] Furthermore, according to the correction temperature obtained by the data processing module, the difference between the correction temperature and the preset target value is calculated, and before the heating temperature is automatically adjusted, the method further includes: Build a dynamic simulation model to simulate the dynamic changes of the distillation process. Describe the complex relationship between multiple variables in the distillation process and continuously modify the model through real-time data input; specific variables include: Temperature: the temperature of each distillation section; Pressure: the pressure changes at different positions in the tower; Composition changes: the volatilization and condensation of each component at different temperatures and pressures.
[0032] Constructed through multivariable dynamic simulation and continuously modified using real-time data, the main factors of the dynamic simulation model include: Thermodynamic equilibrium: describes the mutual transformation between liquid and vapor; material balance: the volatilization and condensation of each component at different temperatures; heat and mass transfer effects: the kinetic laws of energy transfer and material separation during distillation.
[0033] Specifically, when constructing the simulation model, a temperature-component separation response curve will be included to simulate and predict the effect of temperature changes on component separation. The response curve includes multiple parameters in the system, such as the structure of the distillation tower, heat transfer efficiency, pressure, and relative volatility of liquid and vapor.
[0034] Furthermore, the difference between the calculated correction temperature and the preset target value is specifically expressed as: ,in, is the preset target value, this difference value Indicates the deviation between the current correction temperature and the ideal target temperature. The preset target temperature is the ideal temperature set according to the process requirements during the distillation process. It is determined based on experimental data to ensure distillation efficiency and product quality.
[0035] Among them, if If it is a positive value, it means that the actual temperature is lower than the target temperature, and heating needs to be increased; if A negative value indicates that the actual temperature is higher than the target temperature, and it is necessary to reduce heating or increase cooling.
[0036] Specifically, by precisely controlling the temperature during the distillation process, not only the separation efficiency is improved and the purity of the colorless tea ingredients is ensured, but also the fluctuation of temperature and pressure inside the system is reduced by dynamically adjusting the heating temperature, thus improving the stability of the distillation process. These control strategies work together to ensure the high quality and consistency of colorless tea products, enhance the market competitiveness of the products, and provide data support for product quality control and future process improvements.
[0037] Furthermore, according to the obtained difference value, the heating temperature is automatically adjusted by the PID controller. Specifically, the difference value Converted into an adjustment command for the actual heating temperature, the expected temperature adjustment strength is determined based on the historical difference value accumulation (integral control part) and the current difference value (proportional control part). The PID controller includes: S11, the proportional control part is based on the current difference value , directly adjust the heating power to make the current temperature close to the target temperature, expressed as: ,in, Is the proportional gain coefficient, used to adjust the difference value The degree of response to heating temperature; S12, the integral control part is the accumulation of historical difference values, which is used to eliminate steady-state errors and ensure that the system output gradually reaches the target value. It is specifically expressed as: ,in is the integral gain coefficient; S13, the differential control part is used to predict the changing trend of the difference value by calculating the rate of change of the difference value to avoid fluctuations caused by excessive adjustment, which is specifically expressed as: ,in represents the differential gain coefficient, dt represents the time increment; S14, the output signal of the PID controller will gradually adjust the power of the heater according to the changing trend of the difference value, thereby changing the heating temperature.
[0038] Specifically, the PID controller achieves precise control of the temperature of the distillation process by converting the difference value into an adjustment instruction for the actual heating temperature. The PID controller consists of three parts: proportional control, integral control and differential control. Proportional control part: directly adjust the heating power according to the current difference value to make the current temperature quickly approach the target temperature; proportional gain coefficient Used to adjust the response of the difference value to the heating temperature. If it is set too high, the system will over-respond and produce oscillations; if it is set too low, the response may be too slow, affecting the efficiency of the system in reaching the target temperature; Integral control part: It takes into account the accumulation of past difference values, which helps to eliminate long-term steady-state errors. Integral gain coefficient Determines the strength of the integral effect. By accumulating historical difference values, integral control can fine-tune the heating power over a long period of time to ensure that the system eventually reaches and maintains the target temperature. Differential control part: predict the changing trend of the difference value by calculating the rate of change of the difference value, so as to avoid fluctuations caused by over-adjustment, differential gain coefficient Together with the time increment dt, it can predict the expected temperature change and reduce the oscillation and instability of the system; The output signal of the PID controller will gradually adjust the power of the heater according to the changing trend of these difference values, and then change the heating temperature. This control strategy ensures that the distillation process can be carried out at the optimal temperature, improves the separation efficiency, and ensures the purity of the colorless tea ingredients. At the same time, the dynamic adjustment of the PID controller reduces the fluctuations in temperature and pressure inside the system, improves the stability of the distillation process, and thus improves the product quality of colorless tea.
[0039] Furthermore, a pressure-corrected temperature-controlled colorless tea preparation system also includes a distillation detection module, which detects the proportion of components separated during the distillation process in real time and feeds the data back to the main control module to ensure compliance with colorless tea preparation; Among them, gas chromatography technology is used to conduct online detection of the components of each fraction and adjust the distillation conditions in real time.
[0040] Specifically, gas chromatography technology is a technology used to separate and analyze the components in a mixture. It is particularly suitable for detecting volatile compounds. In the colorless tea preparation system, online detection through gas chromatography technology can monitor in real time the proportion of various tea components in different fractions during the distillation process to ensure that the ingredients meet the requirements.
[0041] Furthermore, the gas chromatography technology specifically includes: S21, collecting samples of the raw materials for processing the colorless tea drink and introducing them into the gas chromatograph through the injection port for distillation; S22, using a carrier gas to deliver the evaporated sample into a chromatographic column for separation; wherein the chromatographic column is coated with a stationary phase, and the evaporated compound of the sample and the stationary phase pass through the chromatographic column at different rates, and the carrier gas includes helium or nitrogen; The migration velocity of a specific compound in a chromatographic column is expressed as: , Where v is the migration velocity of the compound, F is the flow rate of the carrier gas, is the retention time of the compound, is the base time and W is the peak width.
[0042] Specifically, the application of gas chromatography technology in the processing of colorless tea drinks achieves efficient analysis of various volatile components in the raw materials by precisely controlling the introduction, evaporation and separation processes of samples. Helium or nitrogen is used as the carrier gas, and the inert properties of these gases ensure the chemical stability of the sample during transmission. At the same time, the high fluidity of the carrier gas helps to speed up the analysis. The selection of the stationary phase in the chromatographic column is crucial to the separation efficiency of the compounds, which determines the interaction strength between different compounds and the stationary phase, thereby affecting their retention time and migration speed. By calculating the retention time, reference time and peak width of the compound, the migration speed of the compound in the chromatographic column can be obtained. This precise separation and analysis capability enables gas chromatography technology to effectively distinguish and quantify the various components in colorless tea drinks, including tea polyphenols, aroma substances and other key compounds, thereby ensuring the quality and consistency of the final product. By real-time monitoring and adjustment of distillation conditions, gas chromatography technology not only improves production efficiency, but also enhances the market competitiveness of the product.
[0043] Furthermore, the gas chromatography technique is used to detect the components of each fraction online and adjust the distillation conditions in real time, specifically including: S31. After the compound flows out of the chromatographic column, it enters the detector and is detected by burning the compound and measuring the generated ions. The compound response value generated by the detector reflects the sensitivity of the compound. The specific compound response value is expressed as: , Where R is the response value of the detector, C is the response factor, and m is the mass of the compound entering the detector per unit time; S32. Generate a chromatogram of the compound based on the electrical signal generated by the detector, monitor the distillation process through the chromatogram and adjust the distillation conditions, such as temperature, pressure and flow, to optimize the production process.
[0044] Specifically, gas chromatography technology is used to conduct online detection of each fraction in the preparation process of colorless tea drinks, and the distillation conditions are automatically adjusted through real-time data feedback, ensuring precise control and optimization of the production process. This technology can accurately analyze the volatile compounds in the fractions, monitor the proportion of key ingredients in real time, and automatically adjust the temperature, pressure and flow rate, thereby improving production efficiency and product quality. In addition, gas chromatography technology can also help discover and solve problems in the production process, reduce impurities, improve product purity, enhance market competitiveness, and provide data support for product quality control and future process improvements to ensure the high quality and consistency of colorless tea drinks.
[0045] The present invention realizes accurate monitoring and regulation of the colorless tea production process by integrating pressure correction temperature control and gas chromatography technology. The system includes a raw material distillation module, a parameter monitoring module, a data processing module, a temperature control module and a main control module. The raw material is loaded into the distillation equipment after cleaning and pretreatment, and then the processed raw material is heated to separate it into different components, mainly including a first component rich in tea polyphenols and other second components without tea polyphenols; The parameter monitoring module is responsible for real-time monitoring of the temperature and pressure at various locations during the distillation process, while the data processing module uses the parameter monitoring module data, combined with the Clausius-Clapeyron equation, to consider the changes in the boiling point of the liquid under different pressures, so as to accurately calculate and correct the actual temperature value. This corrected temperature value is compared with the preset target temperature. If there is a difference, the temperature control module will automatically adjust the heating temperature to ensure that the distillation process reaches the ideal state; A dynamic simulation model is also used to simulate and predict the complex relationship between multiple variables in the distillation process, and the model is continuously corrected through real-time data to improve the accuracy of control. In terms of distillation detection, gas chromatography technology is used to perform online detection of the components of each fraction, and the distillation conditions such as temperature, pressure and flow are adjusted in real time according to the detection results to optimize the production process.
[0046] In general, a colorless tea preparation system with pressure-corrected temperature control not only improves production efficiency and product quality, but also improves the stability of the distillation process of the colorless tea through real-time monitoring and automatic adjustment, thereby improving the product quality of the colorless tea.
[0047] Example 2 This embodiment is different from Embodiment 1 in that the improved Clausius-Clapeyron equation is used, specifically, under high pressure or extreme conditions, the Guggenheim equation or the Antoine equation is used to more accurately describe the variation of boiling point with pressure.
[0048] Specifically, the Guggenheim equation takes into account the effects of intermolecular interactions and can describe the liquid-gas phase transition under high pressure. The equation form is: , Where P is pressure, T is absolute temperature, and A, B, C, D are substance-specific constants.
[0049] The Antoine equation is used to describe the gas-liquid equilibrium in the medium pressure range, and its equation form is: , where P is the vapor pressure, T is the absolute temperature, and A, B, and C are empirical constants of the substance obtained by fitting experimental data.
[0050] In the distillation process of colorless tea, if the system pressure is high, the Antoine equation can be used to describe the boiling point during distillation. The corresponding temperature T can be calculated by measuring the pressure value P and the known constants A, B, and C: , the accurate boiling point under different pressures can be obtained by calculation, and the control of heating temperature can be further optimized, thereby improving the efficiency and effectiveness of the distillation process. This method helps to ensure that the active ingredients in colorless tea drinks, such as tea polyphenols, can be effectively extracted under high pressure conditions, while removing unnecessary ingredients to ensure the quality of the final product.
[0051] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A colorless tea preparation system with pressure correction and temperature control, characterized in that: It includes a raw material distillation module, a parameter monitoring module, a data processing module, a temperature control module and a main control module connected by communication. The raw material distillation module is used to distill the processing raw materials of the colorless tea drink to separate the processing raw materials into different components; The parameter monitoring module is used to monitor the temperature and pressure of each position of the raw material distillation module in real time; The data processing module is used to obtain different boiling points of liquids under different pressures, calculate based on the temperature and pressure data obtained at various positions in the parameter monitoring module, determine the actual temperature and perform correction to obtain the corrected temperature; The different boiling points of the liquid under different pressures are obtained by describing the relationship between temperature and pressure during phase change through the Clausius-Clapeyron equation to obtain the boiling point temperature under different pressures. The specific Clausius-Clapeyron equation is: ; Where, P represents pressure; T represents absolute temperature, unit: Kelvin K; It represents the heat of evaporation, that is, the amount of heat absorbed or released when 1 mole of liquid turns into gas. It represents the difference between the molar volumes of liquid and gas; The temperature control module calculates the difference between the corrected temperature and the preset target value according to the corrected temperature obtained by the data processing module, and automatically adjusts the heating temperature; The main control module is used to control the temperature and pressure during the preparation of the colorless tea beverage.
2. A colorless tea preparation system with pressure correction and temperature control according to claim 1, characterized in that: The separating of the processed raw materials into different components specifically includes separating into a first component and a second component; wherein the first component contains tea polyphenols, and the second component does not contain tea polyphenols.
3. A colorless tea preparation system with pressure correction and temperature control according to claim 1, characterized in that: The temperature and pressure data obtained at each position in the parameter monitoring module are calculated to determine the actual temperature and perform correction to obtain the corrected temperature. The specific correction formula is expressed as: ； in, is the correction temperature; is the actual measured temperature, P is the current pressure, is the standard pressure and k is an empirical constant determined according to the physical properties of the substance.
4. A colorless tea preparation system with pressure correction and temperature control according to claim 1, characterized in that: According to the correction temperature obtained by the data processing module, the difference between the correction temperature and the preset target value is calculated, and before the heating temperature is automatically adjusted, the following is also included: Construct a dynamic simulation model by simulating the dynamic changes of the distillation process and continuously modify the model through real-time data input.
5. A colorless tea preparation system with pressure correction and temperature control according to claim 1, characterized in that: The difference between the calculated correction temperature and the preset target value is specifically expressed as: ,in, is the preset target value, is the difference value, which indicates the deviation between the current calibration temperature and the ideal target temperature. The preset target temperature is the ideal temperature set according to the process requirements during the distillation process. Among them, when When it is a positive value, it means that the actual temperature is lower than the target temperature, and heating is increased; when When it is a negative value, it means that the actual temperature is higher than the target temperature, so reduce heating or increase cooling.
6. A pressure-corrected temperature-controlled colorless tea preparation system according to claim 5, characterized in that: According to the obtained difference value, the heating temperature is automatically adjusted by the PID controller. Specifically, the difference value Converted into an adjustment instruction for the actual heating temperature, the adjustment strength of the expected temperature is determined based on the historical difference value accumulation and the current difference value. The PID controller includes: The proportional control part is based on the current difference value , directly adjust the heating power, expressed as: ,in, Is the proportional gain coefficient, used to adjust the difference value The degree of response to heating temperature; The integral control part is the accumulation of historical difference values, so that the output value reaches the target value, which is specifically expressed as: ,in is the integral gain coefficient; The differential control part is used to predict the changing trend of the difference value by calculating the rate of change of the difference value, which is specifically expressed as: ,in represents the differential gain coefficient, dt represents the time increment; The output signal of the PID controller will gradually adjust the power of the heater according to the changing trend of the difference value, thereby changing the heating temperature.
7. A colorless tea preparation system with pressure correction and temperature control according to claim 1, characterized in that: It also includes a distillation detection module, which detects the proportion of components separated during the distillation process in real time and feeds the data back to the main control module; Among them, gas chromatography technology is used to conduct online detection of the components of each fraction and adjust the distillation conditions in real time.
8. A pressure-corrected temperature-controlled colorless tea preparation system according to claim 7, characterized in that: The gas chromatography technology specifically includes: Collect samples of the raw materials for colorless tea beverage and introduce them into the gas chromatograph through the injection port for distillation; The evaporated sample is then transported into a chromatographic column for separation using a carrier gas; the column is coated with a stationary phase, and the evaporated compounds from the sample and the stationary phase pass through the column at different rates.
9. A pressure-corrected temperature-controlled colorless tea preparation system according to claim 8, characterized in that: The migration velocity of the compound in the chromatographic column is expressed as: , Where v is the migration velocity of the compound, F is the flow rate of the carrier gas, is the retention time of the compound, is the base time and W is the peak width.
10. A colorless tea preparation system with pressure correction and temperature control according to claim 7, characterized in that: The gas chromatography technique is used to detect the components of each fraction online and adjust the distillation conditions in real time, specifically including: After the compound flows out of the chromatographic column, it enters the detector, where it is detected by burning the compound and measuring the generated ions. The compound response value generated by the detector reflects the sensitivity of the compound. The specific compound response value is expressed as: ; Where R is the response value of the detector, C is the response factor, and m is the mass of the compound entering the detector per unit time; A chromatogram of the compound is generated based on the electrical signal produced by the detector. The distillation process is monitored and the distillation conditions are adjusted through the chromatogram to optimize the production process.