Building solid waste powder activity enhancing system based on thermodynamics and granularity regulation and control

Abstract

The invention relates to the technical field of powder data processing, and further relates to a building solid waste powder activity enhancing system based on thermodynamics and granularity regulation and control. The system comprises treatment equipment for treating the building solid waste powder and an automatic control part for controlling the treatment equipment to operate, the automatic control part comprises a thermodynamic regulation and control unit, a granularity optimization and interface coupling unit, a microscopic reconstruction unit and a system stability and activity characterization unit; the thermodynamic regulation and control unit is used for predicting the phase change critical temperature of the building solid waste powder; the particle size optimization and interface coupling unit is used for obtaining particle size time distribution; obtaining the concentration of the silicon-aluminum-oxygen complex; the microscopic reconstruction unit is used for obtaining the density distribution of the building solid waste powder; and the system stability and activity characterization unit is used for calculating an activity enhancement value and feeding back and adjusting parameters of processing equipment. Through dynamic adjustment of a feedback mechanism, the chemical activity of the powder is improved, the energy consumption is reduced, and the microstructure is optimized.

Description

Technical Field

[0001] The invention belongs to the technical field of powder data processing, and in particular relates to a construction solid waste powder activity enhancement system based on thermodynamics and particle size control. Background Art

[0002] Construction solid waste (abbreviated as construction solid waste) is a major solid waste generated during construction projects, renovation and demolition, and urban renewal. Its main components include concrete blocks, bricks and tiles, mortar, ceramics, steel bars, and a small amount of organic matter. Due to their complex composition and physical and chemical properties, these wastes have traditionally been simply landfilled or piled up for disposal, which not only occupies a large amount of land resources, but may also have serious impacts on the ecological environment, such as soil pollution and groundwater leakage. In addition, with the rapid development of the construction industry, the amount of construction solid waste generated continues to grow, and its resource utilization has become an important challenge in the current sustainable development of cities.

[0003] At present, many methods have been proposed and partially applied for the resource treatment technology of construction solid waste. Mechanical crushing is the most common construction solid waste treatment technology. The waste is processed into aggregates or powders of different particle sizes through crushers and screening equipment. Fine-particle powder can be used as a cement substitute or concrete additive. However, due to only physical treatment, the chemical activity of construction solid waste has not been fully stimulated, and its recycling performance is low. In addition, the physical and chemical properties of different wastes vary greatly, resulting in unstable powder performance and difficulty in meeting the requirements of high value-added products. Thermal treatment technology achieves dehydration, phase change and chemical activation of materials by calcining construction solid waste powder at high temperature. This technology can improve the chemical activity of construction solid waste, especially for materials rich in silicates and aluminates. However, high-temperature calcination often requires a lot of energy. At the same time, improper temperature control may lead to crystallization or overburning of the material, which in turn reduces its chemical activity. In addition, thermal treatment technology has limited homogenization processing capabilities for complex wastes, and it is difficult to achieve refined activity control. Chemical activation stimulates the potential chemical activity of construction waste by adding chemical activators (such as alkaline solutions, sulfates, etc.). This method can significantly improve the reactivity of waste and be used to prepare geopolymers or other green building materials. However, the addition of chemical activators will bring additional costs and may lead to a decrease in the long-term stability of the product. In addition, this method has limited ability to treat harmful components in construction waste (such as heavy metals) and may pose environmental risks. Summary of the invention

[0004] The main purpose of the present invention is to provide a construction solid waste powder activity enhancement system based on thermodynamics and particle size control. The system can accurately control the rotary kiln temperature, ball mill grinding speed and other processing parameters, and dynamically adjust through a feedback mechanism to improve the chemical activity of the powder, reduce energy consumption, optimize the microstructure, and significantly improve the efficiency and effect of resource utilization.

[0005] In order to solve the above problems, the technical solution of the present invention is achieved as follows: A construction solid waste powder activity enhancement system based on thermodynamics and particle size regulation, the system comprising: a treatment device for treating construction solid waste powder and an automatic control part for controlling the operation of the treatment device; the automatic control part comprises: a thermodynamic regulation unit, a particle size optimization and interface coupling unit, a microscopic reconstruction unit and a system stability and activity characterization unit; the thermodynamic regulation unit is used to analyze the thermodynamic properties of the construction solid waste powder, determine its reaction activation energy, and simultaneously construct a spatial temperature field to predict the phase change critical temperature of the construction solid waste powder; the particle size optimization and interface coupling unit is used to establish a particle size evolution kinetic equation based on the spatial temperature field and the phase change critical temperature, describe the time evolution of the particle size distribution, solve the particle size evolution kinetic equation, and obtain the particle size time distribution; according to the particle size time distribution, combining the spatial temperature field and the critical temperature of phase change, establishing an interfacial reaction kinetic model, simulating the surface interaction and energy exchange of construction solid waste powder during the chemical reaction process, solving the interfacial reaction kinetic model, and obtaining the concentration of silicon-aluminum-oxygen complex; the microscopic reconstruction unit is used to construct a microstructure reconstruction equation based on a free energy-driven kinetic model, solve the microstructure reconstruction equation, and obtain the density distribution of construction solid waste powder; according to the density distribution, a stress field induced activation equation is established to calculate the stress tensor; the system stability and activity characterization unit is used to calculate the powder activity at each time according to the silicon-aluminum-oxygen complex concentration, stress tensor, density distribution and particle size-time distribution, and calculate the activity enhancement value, and based on the activity enhancement value, feedback adjust the parameters of the processing equipment.

[0006] Furthermore, the processing equipment includes: a rotary kiln and a ball mill; the rotary kiln is used to calcine the construction solid waste powder at high temperature, and then transfer the high-temperature calcined construction solid waste powder to the ball mill; the ball mill grinds the high-temperature calcined construction solid waste powder to obtain ground construction solid waste powder; the parameters of the processing equipment include: the temperature of the rotary kiln and the grinding speed of the ball mill.

[0007] Furthermore, the activation energy of the reaction Calculated by the following formula: ; in, is the number of chemical bonds that need to be calculated in construction solid waste powder, ranging from 2 to 5; is an integer subscript index; is Planck's constant; For the The average moment of inertia of the atoms involved in the chemical bond, , , and They are The mass of the atoms at both ends of a chemical bond; For the The length of the chemical bond; is the silicon-oxygen bond length; is the aluminum-oxygen bond length; is Avogadro's constant; For the The average effective nuclear charge of the atoms involved in the chemical bond; is the dielectric constant of vacuum.

[0008] Furthermore, the phase change critical temperature is calculated by the following formula: ; in, is the phase change enthalpy change of construction solid waste powder; is the specific heat capacity at constant pressure of construction solid waste powder; It is the mixed entropy change of construction solid waste powder; is the current temperature of the rotary kiln; is the initial temperature; is the gas constant; is the critical temperature of phase change of construction solid waste powder.

[0009] Furthermore, the particle size evolution kinetic equation is expressed by the following formula: ; in, is the particle size time distribution, which describes the particle size The particles of construction solid waste powder are The quantity distribution of time; is the effective diffusion coefficient at the critical temperature; is the Laplace operator; is the molar volume; is the surface tension, ranging from ; ,in, is the pre-factor, and its value range is ; is the diffusion activation energy, and its value range is ; is the current grinding speed of the ball mill.

[0010] Furthermore, the following formula is used to establish the interface reaction kinetics model based on the particle size time distribution, combined with the spatial temperature field and the critical temperature of phase change: ; in, is the concentration of silicon-aluminum-oxygen complex; is the particle size distribution function, ;in, is the mean particle size; is the particle size standard deviation.

[0011] Furthermore, the microstructure reconstruction equation is expressed by the following formula: ; in, is the atomic mobility at the critical temperature; is the gradient operator; Atomic diffusion activation energy, ranging from 80 to 120.

[0012] Furthermore, the stress field induced activation equation is established according to the density distribution through the following formula, and the stress tensor is calculated: ; in, for Stress tensor of time; for The volume of construction solid waste powder at that time; is the volume of construction solid waste powder at the initial time; is the Poisson's ratio of construction solid waste powder.

[0013] Furthermore, the powder activity at each time is calculated by the following formula: ; in, for Time powder activity.

[0014] Furthermore, the activity enhancement value is calculated by the following formula: ; in, is the system stability value; the parameters of the processing equipment are adjusted by feedback through the following formula: ; in, The target rotary kiln temperature is adjusted; The grinding speed of the target ball mill is adjusted.

[0015] The construction solid waste powder activity enhancement system based on thermodynamics and particle size control of the present invention has the following beneficial effects: Traditional construction solid waste treatment technologies are mainly based on single high-temperature calcination or mechanical grinding, resulting in high energy consumption and low treatment efficiency. The present invention combines thermodynamic regulation with particle size optimization to accurately control the temperature of the rotary kiln and the grinding speed of the ball mill, significantly reducing the energy consumption of the system. The system stability and activity characterization unit monitors the chemical reaction and physical structure changes of the powder in real time, and dynamically adjusts the equipment parameters through the feedback mechanism, avoiding energy waste and over-processing problems.

[0016] In addition, the microstructure reconstruction unit stabilizes the internal structure of the powder by optimizing the density distribution and stress field, further improving the resource utilization efficiency. The activity of construction solid waste powder is a core indicator that affects its resource utilization efficiency. The system stability and activity characterization unit of the present invention comprehensively considers multiple parameters such as silicon-aluminum-oxygen complex concentration, stress tensor, density distribution, and particle size time distribution, and quantifies the activity changes of the powder in real time by constructing a calculation model of the activity enhancement value.

[0017] At the same time, the feedback adjustment mechanism of the present invention dynamically optimizes the operating parameters of the processing equipment (such as rotary kiln temperature and ball mill grinding speed) according to the activity enhancement value, ensuring that the system always operates in the best state. This closed-loop control mode significantly improves the efficiency and effect of powder material processing, and provides technical guarantee for the realization of high-quality resource utilization of construction solid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the system structure of a construction solid waste powder activity enhancement system based on thermodynamics and particle size control provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] Example 1, reference Figure 1:A construction solid waste powder activity enhancement system based on thermodynamics and particle size regulation, the system comprising: a treatment device for treating construction solid waste powder and an automatic control part for controlling the operation of the treatment device; the automatic control part comprises: a thermodynamic regulation unit, a particle size optimization and interface coupling unit, a microscopic reconstruction unit and a system stability and activity characterization unit; the thermodynamic regulation unit is used to analyze the thermodynamic properties of construction solid waste powder, determine its reaction activation energy, and simultaneously construct a spatial temperature field to predict the phase change critical temperature of the construction solid waste powder; the particle size optimization and interface coupling unit is used to establish a particle size evolution kinetic equation based on the spatial temperature field and the phase change critical temperature, describe the time evolution of the particle size distribution, solve the particle size evolution kinetic equation, and obtain the particle size time distribution; according to the particle size time The interface reaction kinetic model is established by combining the spatial temperature field and the critical temperature of phase change to simulate the surface interaction and energy exchange of the construction solid waste powder during the chemical reaction, solve the interface reaction kinetic model, and obtain the concentration of silicon-aluminum-oxygen complex; the microscopic reconstruction unit is used to construct a microstructure reconstruction equation based on the free energy-driven kinetic model, solve the microstructure reconstruction equation, and obtain the density distribution of the construction solid waste powder; according to the density distribution, a stress field induced activation equation is established to calculate the stress tensor; the system stability and activity characterization unit is used to calculate the powder activity at each time according to the silicon-aluminum-oxygen complex concentration, stress tensor, density distribution and particle size time distribution, and calculate the activity enhancement value, and based on the activity enhancement value, the parameters of the processing equipment are feedback-adjusted.

[0021] Specifically, through thermodynamic analysis, the unit can determine the reaction activation energy of the powder, which is the energy threshold for stimulating the potential activity of solid waste and the thermodynamic basis for the secondary utilization of powder. The level of activation energy directly determines the probability of chemical reaction. Through thermal analysis experiments of powder samples under different temperature conditions (such as differential scanning calorimetry and thermogravimetric analysis), the thermodynamic control unit can accurately depict the change law of reaction activation energy. This law provides theoretical support for optimizing temperature field and energy input strategy. On the other hand, the unit further realizes the global control of the system thermodynamic environment by establishing the spatial temperature field of construction solid waste powder. The construction of the spatial temperature field depends on the study of the thermal conductivity characteristics of the powder, including the measurement and calculation of key parameters such as thermal conductivity, heat capacity and thermal diffusivity. These parameters not only reflect the ability of the powder to absorb and distribute heat, but also determine the phase change behavior of the powder in the local temperature field. By constructing the spatial temperature field, the system can form a thermal gradient in the local area, thereby stimulating the synergistic effect of multiple reaction paths in the powder. For example, when the local temperature is higher than a certain critical value, the silicate in the powder may undergo a dehydration phase transition, thereby generating an amorphous state with higher activity; while in the low temperature area, the aluminate may maintain its original crystalline state, thus forming a diversity of phase transitions. In addition, the thermodynamic control unit uses the spatial temperature field to predict the critical temperature of the phase transition of the powder, which is the key to the phase transition of the internal structure of the powder. The calculation of the critical temperature of the phase transition depends on the thermodynamic equilibrium equation. Combined with the phase characteristics and thermochemical data of the powder, the phase equilibrium point of the system under certain conditions can be accurately determined. For example, when the temperature reaches a certain critical value, the crystal structure in the solid waste powder may be transformed into an amorphous structure, and this process is usually accompanied by a decrease in the free energy of the system. This amorphous structure provides a more favorable microscopic environment for the subsequent chemical reaction due to its higher surface free energy and greater reaction activity. Through the thermodynamic control unit, the optimization control of the heat treatment process can also be achieved. Heat treatment is an important means of activating construction solid waste powder, but its energy efficiency and effect are highly dependent on the precise matching of thermodynamic parameters. Traditional heat treatment processes are often based on a single temperature or excessive energy input, which can easily lead to local overheating or thermal damage of the powder, thereby reducing its activity. The present invention organically combines the activation energy of the powder, the critical temperature of the phase change and the spatial temperature field through a thermodynamic control unit to achieve dynamic regulation and regional optimization of the temperature distribution. By accurately allocating the heat input, the system can effectively stimulate the components with active potential while ensuring the overall structural integrity of the powder. More importantly, the thermodynamic control unit lays a theoretical foundation for subsequent particle size optimization and interface coupling. The particle size distribution of the powder is affected to a certain extent by its phase change behavior during the heat treatment process, and the thermodynamic control unit can provide guidance for subsequent modules by predicting the kinetic characteristics of particle size changes with temperature.For example, in high-temperature areas, powder particles may be refined due to local melting or evaporation, while in medium- and low-temperature areas, larger particles may be formed through particle interaction and agglomeration. These particle size evolution laws directly determine the apparent properties and chemical activity of the powder.

[0022] In the process of particle size optimization, the unit first constructed a kinetic model of the evolution of powder particle size based on the spatial temperature field and phase change critical temperature provided by the thermodynamic control unit. The essence of particle size evolution is the aggregation, decomposition or migration behavior of particles under the action of a specific energy field, and its core is dominated by thermal drive and diffusion mechanisms. By establishing a kinetic model, the unit can describe the dynamic changes of particle size distribution over time, and combine the material properties, thermochemical behavior and external temperature field of construction solid waste powder to accurately simulate the dynamic control effect of particle size under different conditions. For example, in high temperature areas, thermal energy drive may cause melting and decomposition of the surface of powder particles, resulting in a decrease in particle size; while in lower temperature areas, particles may form larger particles through agglomeration effects. This time evolution relationship of particle size distribution not only determines the physical structural characteristics of the powder, but also directly affects the efficiency and rate of subsequent interfacial reactions. After the particle size optimization is completed, the unit further couples the particle size characteristics with the interfacial reaction process to establish a kinetic model between particle size and chemical reaction. Interfacial reaction is a key process for enhancing the activity of construction solid waste powder, which involves chemical transformation, energy exchange and material migration of active sites on the surface of powder. The essence of interfacial reaction is the linkage between surface area change and chemical reaction rate brought about by particle size optimization. When the particle size is small, the specific surface area of ​​the powder increases, providing more active sites for the reaction and enhancing the contact efficiency between the surface and the reactants. However, excessive reduction of particle size may lead to instability of the high energy state on the particle surface, which in turn causes agglomeration effect or local melting and reduces activity. Therefore, the particle size optimization and interface coupling unit controls the relationship between particle size and interfacial reaction through dynamic balance to ensure that the system achieves the highest reaction efficiency within the thermodynamic allowable range. In addition, the unit reveals the transformation mechanism of the main components in construction solid waste powder through in-depth research on interfacial reactions. Silicates and aluminates in powder are the main sources of reaction activity, which undergo a series of complex chemical and physical transformations during interfacial reactions, such as dehydration, complexation, dissolution or recrystallization. The occurrence of these transformation processes is closely related to the particle size characteristics of the particles. Powders with smaller particle sizes show higher chemical reactivity in interfacial reactions. This is because small particle size not only reduces diffusion resistance, but also enhances the chemical potential gradient on the particle surface, thereby accelerating the formation of silicon-aluminum-oxygen complexes. These complexes are the core products of interfacial reactions, and the dynamic changes in their concentrations directly reflect the activity level of interfacial chemistry. In order to further optimize the coupling relationship between particle size and interfacial reactions, this unit constructs a kinetic model of interfacial reactions by simulating the exchange and transfer of energy on the powder surface during chemical reactions. This model can not only quantitatively describe the rate and path of interfacial reactions, but also predict the distribution of reaction products of the system under different operating conditions by inputting particle size distribution and thermodynamic characteristic parameters.For example, under conditions of higher temperature and moderate particle size, the interfacial reaction kinetic model may predict a significant increase in the formation rate of silicon-aluminum-oxygen complexes, and this result provides a direct basis for adjusting the parameters of the processing equipment. The particle size optimization and interface coupling unit also verified the enhancing effect of its regulation mechanism on the activity of powders through experiments and simulations. For example, by real-time monitoring and calculation of the particle size distribution, specific surface area and concentration of interfacial reaction products of the powder, the unit can clearly determine the contribution rate of different particle size ranges to the activity, thereby adjusting the operating parameters of the processing equipment in a targeted manner. While optimizing the particle size, the coupling mechanism of the interfacial reaction ensures the efficient use of chemical energy and significantly improves the overall efficiency of the system.

[0023] Based on the temperature field and stress field data provided by the thermodynamic control unit, the micro-reconstruction unit describes the evolution of the microstructure inside the powder through a free energy-driven kinetic model. In thermodynamics, free energy reflects the ability of the system to tend to be stable, while in microstructure, the distribution of free energy determines the energy gradient and driving force inside the material. The micro-reconstruction unit constructs a mathematical model for microstructure reconstruction by calculating the free energy change of the powder under the action of external thermal and stress fields. This model can accurately describe the material migration, phase change and interface reorganization process inside the particles, thereby predicting and optimizing the density distribution of the powder and its performance during the activation process. Density distribution is one of the core results of powder micro-reconstruction. After being subjected to thermal and stress effects, construction solid waste powder may undergo rearrangement and local densification inside the particles, thereby significantly changing the overall density characteristics of the material. The redistribution of density not only affects the mechanical properties of the powder, but also has a profound impact on its chemical reaction rate and interface behavior. For example, areas with higher density tend to exhibit lower porosity and higher reaction resistance, while areas with lower density have larger active sites and stronger reaction driving capabilities. Through the precise modeling and optimization of the micro-reconstruction unit, the system can dynamically adjust the density distribution inside the powder material to keep it in the best active state during the activation process. Based on the density distribution, the micro-reconstruction unit further calculates the distribution and evolution of the stress field. The stress field is an important feature of the internal structure of the powder material in response to the external force, and its change directly affects the activity enhancement behavior of the powder material. During the activation process of construction solid waste powder, external stress may induce crack propagation, interface slip and phase change behavior inside the particles, thereby releasing new active sites and enhancing the efficiency of the interface reaction. The micro-reconstruction unit quantitatively describes the coupling relationship between external stress and internal microstructure by constructing a stress field induced activation equation. This equation can predict the distribution of stress tensors inside the powder material, and combined with the density reconstruction results, it reveals the behavior mode of the material under complex thermal and mechanical fields. At the same time, the micro-reconstruction unit also fully considers the balance between the free energy and surface energy of the powder material. At the microscopic scale, the interface energy of the particles is the key to their structural stability and reactivity. The micro-reconstruction unit simulates the energy exchange process on the particle surface and optimizes the interface morphology so that the surface energy reaches the best balance between system stability and reactivity. For example, the system may increase the number of reaction sites while avoiding excessive energy dissipation and agglomeration by controlling the grain size, morphology and surface roughness of the particles. This precise control of surface energy can not only significantly improve the chemical activity of the powder, but also improve its stability and durability during long-term use.

[0024] The core of the system stability and activity characterization unit is to combine multiple parameters such as the concentration of silicon-aluminum-oxygen complexes, stress tensor, density distribution and particle size time distribution of the powder to comprehensively characterize its chemical reaction characteristics and physical properties under different treatment conditions. The concentration of silicon-aluminum-oxygen complexes is a key indicator for evaluating the chemical activity of powders. It directly reflects the quality and quantity of reaction products generated by solid waste powders during the interfacial reaction. In efficient interfacial reactions, the generation of silicon-aluminum-oxygen complexes is often accompanied by the release of energy and a significant increase in active sites. Therefore, this unit can accurately judge the effectiveness of the treatment process by dynamically monitoring the concentration. At the same time, the concentration change of silicon-aluminum-oxygen complexes also reveals the rate and efficiency of interfacial chemical kinetics, providing feedback basis for the parameter optimization of the interface coupling unit. In addition to chemical parameters, stress tensor and density distribution are two important dimensions for characterizing the physical stability of powders. The stress tensor describes the distribution of the stress state of the internal structure of the powder under the action of external forces. Its size and distribution directly affect the deformation, crack propagation and final physical stability of the particles. For example, when the stress is concentrated in certain local areas, the powder may undergo irreversible microscopic damage, thereby affecting its overall performance. Therefore, this unit can identify and predict possible instability areas by calculating the stress tensor in real time, and at the same time, combine the dynamic change law of the stress field to put forward specific suggestions for optimizing the processing parameters. The density distribution reflects the microstructural uniformity and densification degree of the powder. This parameter not only affects the macroscopic mechanical properties of the powder, but also directly relates to the mass transfer efficiency of the chemical reaction. The optimization of the density distribution can maximize the reaction contact area of ​​the powder, while avoiding the reaction stagnation or efficiency reduction caused by the overly dense structure. The particle size time distribution, as another important parameter to characterize the physical properties of the powder, is closely related to the above-mentioned chemical and physical indicators. The dynamic evolution of the particle size reflects the agglomeration, crushing or dissolution behavior of the powder during the processing, and its distribution directly determines the specific surface area and the effectiveness of the interfacial reaction. For example, a smaller particle size will provide more reaction surface, thereby increasing the chemical activity of the powder, but too small a particle size may lead to agglomeration or excessive surface energy. Therefore, this unit can not only evaluate the trend of particle size changes during the treatment process, but also optimize the target particle size range at different treatment stages through dynamic characterization of particle size time distribution, so as to achieve the best match between particle size and activity. After completing the multi-dimensional parameter characterization, the system stability and activity characterization unit further calculates the overall activity enhancement value of the powder through a comprehensive model. This enhancement value quantitatively reflects the optimization effect of the treatment equipment under specific conditions by coupling multiple parameters. For example, when the activity enhancement value is significantly improved, it indicates that the thermodynamic and kinetic parameters of the system have achieved the best match, and when the enhancement value shows a downward trend, the operating parameters of the treatment equipment may need to be readjusted. Through this feedback mechanism, the unit can achieve dynamic adjustment and closed-loop control of the entire system to ensure the continuous improvement of powder activity and system efficiency.The system stability and activity characterization unit also has powerful prediction and diagnosis capabilities. During the processing, the chemical and physical properties of the powder may change unpredictably due to fluctuations in external conditions. For example, the non-uniform distribution of the temperature field may cause local overheating or insufficient reaction, and stress concentration may cause structural instability. Through real-time monitoring and dynamic modeling, this unit can quickly identify these abnormal changes and perform fault diagnosis and trend prediction in combination with the system's historical operation data. For example, when the amplitude of the stress tensor change exceeds the normal range, the unit can issue a warning signal and recommend adjusting the direction or magnitude of the external force; when the particle size time distribution deviates from the target range, the unit can automatically correct the temperature field or optimize the mechanical processing conditions. This real-time feedback and prediction capability not only greatly improves the stability of the system operation, but also effectively avoids waste of resources or processing failures caused by abnormal conditions.

[0025] Embodiment 2: The processing equipment comprises: a rotary kiln and a ball mill; the rotary kiln is used to calcine the construction solid waste powder at high temperature, and then transfer the high-temperature calcined construction solid waste powder to the ball mill; the ball mill grinds the high-temperature calcined construction solid waste powder to obtain ground construction solid waste powder; the parameters of the processing equipment include: the temperature of the rotary kiln and the grinding speed of the ball mill.

[0026] Specifically, the rotary kiln is an important tool for thermodynamic regulation of construction solid waste powder, and its main function is to calcine the powder under high temperature conditions. Through uniform heating in the rotary kiln, the inorganic components (such as silicates and aluminates) in the powder will undergo a series of thermal decomposition, dehydration and phase change processes, thereby releasing their potential chemical activity. For example, during the calcination process, silicates may be transformed from a crystalline state to an amorphous state. This amorphous material has a higher specific surface area and stronger surface free energy, which can provide more active sites for subsequent interfacial reactions. Similarly, aluminates may decompose or complex at high temperatures to generate chemical forms that are easier to combine with reactants. The temperature control of the rotary kiln is a key parameter that determines the calcination effect. Different temperatures will directly affect the phase change critical point of the powder and the conversion efficiency of the chemical components. For example, when the temperature is too low, the material may not be fully activated, resulting in low activity; when the temperature is too high, the material may be overburned, resulting in structural damage or crystallization of the powder, thereby reducing its reaction performance. Therefore, the present invention ensures that the powder is fully activated under the best thermodynamic conditions by precisely controlling the temperature of the rotary kiln. The high-temperature calcined powder coming out of the rotary kiln is transferred to a ball mill for grinding. The ball mill is the main equipment for optimizing the particle size of the powder. Its function is to refine and homogenize the powder through the action of mechanical force, thereby improving the specific surface area and particle size uniformity of the powder. The particle size and distribution of the powder have a direct impact on its chemical activity and physical properties. A smaller particle size can significantly increase the reaction surface area of ​​the powder, thereby increasing the chemical reaction rate, but too small a particle size may lead to agglomeration between particles, thereby reducing the overall dispersibility and reaction efficiency. In order to solve this problem, the present invention dynamically controls the grinding effect of the powder by adjusting the grinding speed of the ball mill, so that the particle size distribution and specific surface area are kept within an optimized range. In addition, the grinding process of the ball mill also affects the microstructure of the powder. For example, through the action of mechanical force, crystal defects in the powder may be further excited, thereby releasing more active sites.

[0027] The linkage control of the rotary kiln and the ball mill is the technical focus of this embodiment. This linkage control forms a full-process solution from thermodynamic regulation to particle size optimization by organically combining the high-temperature calcination process of the rotary kiln with the mechanical grinding process of the ball mill. For example, the thermal conditions provided by the rotary kiln can create the best environment for the phase change and chemical activation of the powder, and the ball mill further amplifies the promotion of the chemical reaction by the particle size refinement and homogenization of the powder. The parameter settings of the two also need to be accurately matched according to the characteristics and target requirements of the powder. For example, for powders with a high content of silicon-aluminum-oxygen complexes, the temperature of the rotary kiln can be appropriately increased to promote the formation of the complex, and the particle size optimization of the powder can be ensured by adjusting the speed of the ball mill, thereby maximizing its chemical reaction performance. In addition, in order to improve efficiency and reduce energy consumption, the rotary kiln and the ball mill in this embodiment are closed-loop optimized through the automatic control system of the present invention. At each stage of powder processing, the system stability and activity characterization unit monitors the chemical parameters (such as silicon-aluminum oxide complex concentration), physical parameters (such as particle size distribution, density distribution) and system operation status (such as rotary kiln temperature, ball mill speed) of the powder in real time. Through the feedback mechanism, the system can dynamically adjust the equipment parameters according to the monitoring results. For example, when the particle size distribution of the powder deviates from the target range, the system can automatically adjust the speed of the ball mill to optimize the grinding effect; when the activity of the calcined powder is insufficient, the system can appropriately increase the temperature of the rotary kiln or extend the calcination time to ensure the efficient performance of the powder in subsequent chemical reactions.

[0028] Example 3: Reaction Activation Energy Calculated by the following formula: ; in, is the number of chemical bonds that need to be calculated in construction solid waste powder, ranging from 2 to 5; is an integer subscript index; is Planck's constant; For the The average moment of inertia of the atoms involved in the chemical bond, , , and They are The mass of the atoms at both ends of a chemical bond; For the The length of the chemical bond; is the silicon-oxygen bond length; is the aluminum-oxygen bond length; is Avogadro's constant; For the The average effective nuclear charge of the atoms involved in the chemical bond; is the dielectric constant of vacuum.

[0029] Specifically, the activation energy of the reaction The calculation formula consists of two parts, representing the contribution of the moment of inertia of the chemical bond and the contribution of the electrostatic interaction. and Planck's constant The combination of describes the rotational energy distribution of molecules at different quantum energy levels. The expression of rotational inertia is Reduced mass and bond length , physical modeling is used to relate the geometric structure and rotational properties of different chemical bonds in the powder. For example, for the Si-O bond, its bond length The change of directly affects the magnitude of the moment of inertia, thereby changing the rotational energy level distribution of the chemical bond. The attenuation effect of bond length on energy contribution is further considered, reflecting the coupling relationship between bond length and molecular spatial scale. This bond length regulation mechanism in quantum mechanics provides a theoretical basis for analyzing the dynamic changes of bond length of powder under high temperature treatment. The second part of the formula focuses on the electrostatic interaction of chemical bonds, using Avogadro's constant , nuclear charge and the vacuum dielectric constant , quantifies the Coulomb potential energy of different chemical bonds (such as Al-O). The energy expression of electrostatic interaction is related to the bond length This design reflects the fact that electrostatic attraction increases as the chemical bond length decreases. For example, during calcination, when the aluminum-oxygen bond When the bond length of the electrostatic potential energy is shortened, the electrostatic potential energy increases significantly, which helps to form active sites and improve the overall chemical reaction rate. The construction of this part of the formula takes into account the bond length changes and electron distribution rearrangements that may occur in construction solid waste powder under high temperature conditions. By quantitatively describing the changes in Coulomb potential energy, it provides a theoretical basis for optimizing the chemical reaction activation process.

[0030] Each parameter in the formula contains a deep understanding of the physical and chemical properties of construction solid waste powder. The value range of is 2 to 5, indicating that the formula focuses on the main bond types (such as Si-O, Al-O, etc.) that are closely related to the activity of construction solid waste, in order to simplify the calculation while capturing the key information to the greatest extent. By considering the effective charge of atoms in chemical bonds, it reflects the charge distribution characteristics between molecules and provides an accurate input for evaluating electrostatic potential energy. In addition, Planck's constant The introduction of combines the formula with the basic principles of quantum mechanics, making it possible to quantify the rotational energy of molecules, which is closely related to the changes in the microstructure of the powder. In practical applications, by measuring or simulating the chemical bond characteristics of the powder, the formula can be used to calculate the reaction activation energy under different treatment conditions, thereby providing theoretical support for optimizing parameters such as calcination temperature and grinding speed. For example, when the calculated activation energy corresponding to a certain calcination temperature is the lowest, it indicates that this temperature can most effectively stimulate the chemical activity in the powder, thereby providing a reference for the operation of the rotary kiln. Similarly, during the particle size optimization process, by analyzing the changing trend of the moment of inertia, the grinding speed can be dynamically adjusted so that the particle size distribution of the powder is more in line with the needs of activity enhancement.

[0031] Example 4: The critical temperature of phase change is calculated by the following formula: ; in, is the phase change enthalpy change of construction solid waste powder; is the specific heat capacity at constant pressure of construction solid waste powder; It is the mixed entropy change of construction solid waste powder; is the current temperature of the rotary kiln; is the initial temperature; is the gas constant; is the critical temperature of phase change of construction solid waste powder.

[0032] Specifically, the first part of the formula The activation energy of the reaction and the gas constant This ratio reflects the relationship between chemical bond energy and thermodynamic energy units. , the calculation of phase transition temperature can fully consider the kinetic characteristics of chemical reactions. When the phase transition critical temperature is larger, The dynamic adjustment term in the formula Reflects the current temperature Relative to the initial temperature The effect of changes in the phase transition temperature. This term describes the cumulative effect of temperature gradients in thermodynamic processes. For example, when the operating temperature of a rotary kiln is When it continues to rise, the increase in this item will drive the increase of the critical temperature of phase change, indicating that the system needs to adapt to the energy input of the external environment. This dynamic regulation provides feedback basis for the thermodynamic control unit, which can help the rotary kiln adjust the operating parameters according to the real-time temperature. It is the mixing entropy change Factors affecting the critical temperature of phase change. In thermodynamics, the mixing entropy change reflects the degree of disorder of material mixing. The greater the mixing entropy of multiple chemical components in the powder, the more the system tends to be thermodynamically stable, and vice versa. The sensitivity of this item to entropy change is intuitively reflected in the form of an exponential function: when the mixing entropy change is large, the exponential value approaches zero, indicating that the critical temperature of phase change is significantly suppressed; and when the entropy change is small, the value of the critical temperature of phase change is significantly increased. This characteristic explains the close relationship between the ratio of powder components and phase change behavior, and provides a theoretical basis for optimizing powder mixing design. The last item Reflects enthalpy change and specific heat capacity at constant pressure The correction effect on the critical temperature of phase change. The enthalpy change of phase change is the heat absorbed or released by the powder during the phase change process. Its size is closely related to the strength of the chemical bonds in the powder and the intermolecular forces. When the enthalpy change is large, the system needs to consume more energy to complete the phase change, so the critical temperature of phase change will increase significantly. It reflects the heat capacity of the powder, that is, the material's ability to absorb heat energy. When is larger, the powder is less sensitive to temperature changes and the critical temperature of phase change is relatively low, which indicates that the material is more thermodynamically stable. Through this correction term, the formula can dynamically capture the effect of the thermophysical properties of the powder on the phase change behavior. Overall, the formula ) and thermodynamic state functions (such as , , ) are combined to systematically describe the phase transition process of construction solid waste powder. The results can not only help predict the structural transformation behavior of powder under specific temperature conditions, but also guide the optimization of rotary kiln operating parameters. For example, when the calculated phase transition critical temperature When the temperature is significantly higher than the current temperature of the rotary kiln, it may be necessary to increase the calcination temperature appropriately to ensure the smooth phase change; When it is low, the overall activation efficiency can be optimized by adjusting the powder ratio to reduce the enthalpy change or increase the mixing entropy change.

[0033] Example 5: The particle size evolution kinetic equation is expressed by the following formula: ; in, is the particle size time distribution, which describes the particle size The particles of construction solid waste powder are The quantity distribution of time; is the effective diffusion coefficient at the critical temperature; is the Laplace operator; is the molar volume; is the surface tension, ranging from ; ,in, is the pre-factor, and its value range is ; is the diffusion activation energy, and its value range is ; is the current grinding speed of the ball mill.

[0034] Specifically, the left side of the formula Indicates particle size In time The distribution change rate describes the change of the number of powder particles over time. The three terms on the right correspond to the diffusion effect, the particle size change driven by surface tension, and the thermodynamic driving effect of the powder, which together determine the kinetic characteristics of the particle size evolution. It reflects the influence of diffusion effect on particle size evolution. Diffusion coefficient It is the temperature It is a function of the diffusion capacity of particles under specific thermodynamic conditions. It shows that the diffusion coefficient increases with the diffusion activation energy and temperature The diffusion activation energy is adjusted dynamically according to the changes in reflects the minimum energy required for particle diffusion, the higher It means that the particles are difficult to diffuse, and The increase of helps to enhance the diffusion behavior. Through this relationship, the diffusion effect can explain the trend of uniform particle size of powder during heat treatment. The spatial variation of the particle size distribution is described by the Laplace operator, indicating that the diffusion of particles mainly occurs in the area with a large particle size gradient.

[0035] Item 2 Describes the driving effect of surface tension on particle size change. Surface tension It is an important representation of the surface energy of powder particles and directly affects the stability of particles. For small-sized particles, the relative effect of surface tension is more significant, which may cause the particles to dissolve or fuse, thereby reducing the total surface energy. The term shows that the surface tension-driven effect is related to the particle radius Inversely proportional to the square of the surface tension, that is, small-sized particles are more easily driven by surface tension and change. This mechanism can explain the phenomenon that small particles gradually decrease and large particles gradually form during the processing of powder, thus making the particle size distribution evolve in a more uniform direction. describes the contribution of thermodynamic driving to particle size evolution. is an activation energy parameter that reflects the minimum energy required for the particle size evolution process. Similar to the diffusion effect, the strength of the thermodynamic drive is related to the temperature. The formula captures the trend of particle size distribution under thermodynamic gradients. For example, at high temperature, the energy state of the particles is close to their activation energy threshold, so the rate of change of particle size will be significantly accelerated, while at low temperature, the particle size distribution tends to be stable. This part is important in explaining the effect of temperature on particle size change during powder processing. The grinding speed in the formula It is the key factor affecting the particle size evolution by mechanical action. Indicates the current grinding speed relative to the initial speed This parameter affects the dynamic evolution of particle size distribution by adjusting the mechanical collision and crushing strength of the particles. When the grinding speed is high, the collision frequency and energy between particles increase significantly, thereby accelerating the reduction of particle size; when the speed is low, the influence of mechanical action is relatively weakened, and the particle size change is mainly determined by thermodynamics and diffusion effects. By introducing the grinding speed parameter, the formula realizes the linkage description of thermodynamic regulation and mechanical action, providing a theoretical basis for optimizing the operating parameters of the ball mill.

[0036] Example 6: An interfacial reaction kinetic model is established by the following formula based on the particle size time distribution, combined with the spatial temperature field and the critical temperature of phase change: ; in, is the concentration of silicon-aluminum-oxygen complex; is the particle size distribution function, ;in, is the mean particle size; is the particle size standard deviation.

[0037] Specifically, the core variable in the formula is the concentration of the silicon-aluminum-oxygen complex Time rate of change This quantitative index directly reflects the rate of generation of reaction products during the interfacial reaction of the powder and is an important parameter for evaluating chemical activity. The change in generation rate is driven by multiple factors, including thermodynamic conditions, particle size distribution characteristics, and the energy requirements of the interfacial reaction. First, the reaction rate is affected by thermodynamic drive, which is The activation energy here is is the minimum energy required for the reaction to occur, and the critical temperature of the phase transition This determines the thermodynamic state of the system. When the activation energy increases, the limiting effect of the reaction rate on the activation energy is weakened, which significantly increases the reaction rate. This mechanism reflects the direct promotion of the chemical activity of the powder by high-temperature calcination, and also reveals the coupling relationship between the activation energy and the thermodynamic environment. In the reaction kinetics model, the dynamic change of the particle size time distribution plays a vital role. Through the time derivative term , the formula couples the evolution of particle size distribution with the reaction rate. Particle size distribution is an important parameter to describe the particle size characteristics of powders, and its change directly affects the specific surface area of ​​the particles and the contact efficiency of the interfacial reaction. Particles with smaller particle sizes have higher specific surface areas and therefore provide more active sites in interfacial reactions. When the particle size distribution of the powder tends to be uniform and the particle size decreases, the rate of interfacial reaction increases significantly. The time derivative term captures the trend of particle size distribution over time, reflecting the role of particle size optimization in promoting reaction performance in a dynamic environment.

[0038] At the same time, the model also integrates the effect of interface characteristics on reaction rate through the integral term Describes the coupling effect between particle surface tension and particle size distribution. Particle size distribution function Using normal distribution, with mean and standard deviation is a parameter that reflects the distribution characteristics of particles of different particle sizes in the powder. By weighting the contribution of all particle sizes through integration, this term can systematically capture the effect of the entire particle size range on the interfacial reaction rate. In addition, the exponential term Further introduction of surface tension The regulatory effect of the particle surface energy on the reaction activity is revealed. Higher surface tension will inhibit the activity of small-sized particles, while lower surface tension will enhance the reactivity of small particles. This mechanism reflects the chemical behavior of powder under interfacial energy gradient and provides a theoretical basis for optimizing surface tension parameters. The overall formula organically combines thermodynamic conditions, particle size distribution and interface characteristics to form a comprehensive kinetic description framework. It captures the complex changes of construction solid waste powder from macro to micro through the synergistic effect of multi-dimensional parameters. For example, when the critical temperature of the powder phase change When the particle size distribution is relatively high and the particle size distribution is relatively narrow, the generation rate may reach a peak value, indicating that the chemical reaction performance is optimal under this condition. On the contrary, when the particle size distribution is too wide or the surface tension is relatively high, the interfacial reaction rate may be significantly limited. This model can not only explain the change law of the activity of the powder under different heat treatment conditions, but also provide a quantitative basis for the actual process optimization. Through this formula, the treatment process of construction solid waste powder can be more accurately controlled. For example, in actual operation, the temperature field of the rotary kiln can be adjusted to optimize At the same time, the uniformity of particle size distribution can be controlled by adjusting the grinding speed of the ball mill. In addition, for specific construction solid waste powder components, surface tension related parameters can be selectively adjusted to further improve the interface reaction efficiency. The application of the formula provides scientific support for the stable operation of the system and the improvement of resource utilization.

[0039] Example 7: The microstructure reconstruction equation is expressed by the following formula: ; in, is the atomic mobility at the critical temperature; is the gradient operator; Atomic diffusion activation energy, ranging from 80 to 120.

[0040] Specifically, the left side of the equation Describes the rate of change of powder density over time. This physical quantity reflects the dynamic process of microstructure reconstruction, that is, the tendency of the internal structure of the powder to stabilize under different forces and energy fields. The time variation of density distribution is driven by the two factors on the right, which correspond to the atomic migration effect under thermodynamic gradient and the local density change induced by interface reaction. The first term It reflects the driving effect of thermodynamic gradient on density distribution. Indicates critical temperature The atomic mobility under density gradient is closely related to the material properties and thermodynamic state of the powder. The mobility determines the speed at which atoms move under density gradient. and divergence operator They describe the direction and degree of change of the density gradient respectively. When the density gradient is large, the atomic migration behavior is more significant, which is manifested as the diffusion of high-density areas to low-density areas. This diffusion trend helps to evenly distribute the energy of the system and stabilize the structure. In addition, It represents the ratio of activation energy to temperature, which directly affects the driving force of atomic migration. Higher activation energy or lower temperature will reduce the rate of atomic migration, thereby slowing down the adjustment speed of density distribution. Through this description, the formula closely links thermodynamic conditions and material migration behavior, providing a theoretical framework for understanding the changes in the internal structure of powder in a thermal environment.

[0041] Item 2 represents the contribution of the interface reaction to the density distribution. is the concentration of silicon-aluminum-oxygen complex, which reflects the intensity of the interfacial reaction and the rate of formation of the reaction products. As the core product of the interfacial reaction, the change of its concentration directly affects the microstructure reorganization of the powder. For example, when At high concentrations, the formation of reaction products will significantly change the local density distribution, which is manifested as the formation of high-density areas or the disappearance of low-density areas. The atomic diffusion activation energy is introduced This parameter reflects the minimum energy required for an atom to migrate from one position to another. A higher diffusion activation energy will significantly inhibit diffusion behavior, while a lower diffusion activation energy will enhance the migration ability of atoms. This section describes how thermodynamic gradients and interface reactions jointly affect the reorganization process of density distribution through atomic diffusion. In summary, the microstructure reconstruction equation couples thermodynamic gradient drive, atomic migration, and interface reaction to comprehensively describe the microscopic reorganization behavior of construction solid waste powder during thermal treatment. Through this equation, the dynamic changes in the internal structure of the powder under different treatment conditions can be deeply analyzed. For example, under high temperature conditions, The increase in , thereby accelerating the adjustment of density distribution; while the lower This will further promote atomic diffusion and enhance the driving force of interface reaction on density change. These mechanisms work together to make the microstructure of the powder reach a stable and uniform distribution state in a short time.

[0042] Example 8: According to the following formula, a stress field induced activation equation is established based on the density distribution to calculate the stress tensor: ; in, for Stress tensor of time; for The volume of construction solid waste powder at that time; is the volume of construction solid waste powder at the initial time; is the Poisson's ratio of construction solid waste powder.

[0043] Specifically, the left side of the formula It's in time The stress tensor under the condition reflects the stress state inside the powder caused by external force or internal energy change. The stress tensor is not only an important representation of the mechanical properties of the powder, but also a key parameter in the activity enhancement process. Its size and distribution directly affect important phenomena such as material deformation, crack generation and interface reaction. The first part of the formula Combined with density distribution and elastic modulus , describes the basic mechanical properties of powder materials. Density distribution It is calculated through the microstructure reconstruction equation, reflecting the structural changes of the powder due to thermodynamic and mechanical effects during the processing. It is an indicator to measure the material's ability to resist deformation under stress, and its value is affected by factors such as powder composition, density and temperature. and Combined with, this term can dynamically describe the changes in the mechanical properties of the powder. Volume change term It is one of the core variables in the formula, reflecting the powder This term describes the expansion or contraction behavior of the powder under thermal treatment and mechanical action, and its value is determined by the initial volume and time Volume When the powder expands, this term is positive, indicating that tensile stress is generated inside the material; when the powder shrinks, this term is negative, indicating that compressive stress is generated inside the material. The introduction of this term can capture the response characteristics of the powder under different stress states, especially during high-temperature calcination or mechanical grinding, where the effect of volume change on stress distribution is particularly significant.

[0044] Thermodynamically driven terms Describes the activation energy and critical temperature of phase transition The negative exponential relationship of activation energy indicates that higher activation energy will inhibit the rapid generation of stress, while higher temperature (i.e. Increasing the activation energy will reduce the effect of activation energy, thereby accelerating the formation of stress. This part reveals the significant effect of thermodynamic conditions on the evolution of powder stress field, and also reflects the importance of thermodynamic control units in optimizing stress distribution. Poisson's ratio The introduction of reflects the lateral deformation characteristics of the powder material. Poisson's ratio is the ratio of the lateral strain to the longitudinal strain of the material during the stress process, and its value is between 0 and 0.5. In the formula, Poisson's ratio is expressed by The calculation of the stress tensor is modified in the form of , which fully considers the mechanical response characteristics of the material under three-dimensional stress state. When the Poisson's ratio is close to 0.5 (the material is close to a completely incompressible state), the influence of this term is significant; when the Poisson's ratio is small (such as brittle materials), its influence is relatively small. By introducing the Poisson's ratio, the formula can more accurately describe the behavior of the powder in the actual stress field. The formula converts the powder in time The evolution of the stress field in the material is fully described. The cumulative effect of the integral term shows that the formation of the stress tensor is a dynamic process driven by the density distribution, volume change and thermodynamic conditions of the material. For example, during the high-temperature calcination stage of the powder, the density of the material may change dramatically, accompanied by volume expansion or contraction, which in turn triggers a significant adjustment of the stress field. This dynamic change directly affects the structural stability and activity improvement of the powder.

[0045] Example 9: The powder activity at each time is calculated by the following formula: ; in, for Time powder activity.

[0046] Specifically, the density distribution term in the formula This shows the fundamental influence of the internal structure of the powder on the activity. The density distribution is calculated by the microstructure reconstruction equation, and its value changes over time reflect the internal reorganization state of the powder particles under the action of thermodynamics and mechanics. Regions with higher density tend to show higher reactivity because of the higher concentration of internal active sites and the increased surface area that may also increase with density. In the treatment of construction solid waste powder, the density distribution not only determines the physical properties of the particles, but also provides the necessary microstructural support for the occurrence of chemical reactions. Secondly, the formula The term reflects the contribution of the dynamic change of the concentration of silicon-aluminum-oxygen complexes to the activity of the powder. This ratio represents the ratio of the current concentration of silicon-aluminum-oxygen complexes to the initial concentration, and is used to measure the rate of chemical complex formation and its cumulative effect. Silicon-aluminum-oxygen complexes are the core products of interfacial reactions, and the change in their concentration directly reflects the chemical activity of the powder during the reaction. When the ratio is close to 1, it indicates that the generation of the reaction product has reached a saturated state, and the activity may tend to stabilize at this time; and when the ratio is significantly less than 1, it indicates that the chemical reaction of the powder has not yet fully realized its potential and there is still room for further stimulation.

[0047] The stress field effect is expressed through the exponential term Reflection, stress tensor It is calculated by the stress field induced activation equation, which describes the stress distribution state of the powder in the mechanical and thermodynamic environment. Stress will significantly affect the chemical reaction performance by changing the crystal structure and active site distribution inside the powder. The exponential term shows that when the stress value is high, the crystals inside the powder may be destroyed due to excessive stress, resulting in reduced activity; when the stress value is moderate, it can promote the reorganization of the crystals and increase the active sites, thereby increasing the overall chemical reaction rate. This part reveals the dual effects of the stress field on the activity of powders, and provides a basis for optimizing the mechanical conditions during the powder processing process. The time cumulative effect of the integral term reflects the dynamic change trend of the powder activity throughout the processing process. By analyzing the time The integral of , the formula can capture the change in the activity of the powder at different time points and relate it to the cumulative effect of the entire reaction process. This quantification in the time dimension provides a clear path for analyzing the activity improvement of the powder under specific operating conditions. It is the time derivative of the particle size time distribution, which is used to describe the effect of the dynamic change of the powder particle size distribution on the activity. Particle size is a key physical parameter that affects the reactivity of powders. Smaller particle sizes are often accompanied by higher specific surface areas, thereby enhancing chemical reaction performance. This term reveals the direct contribution of particle size optimization during the processing of powders to activity by reflecting the rate of change of particle size. For example, when the particle size distribution tends to be uniform and the particle size gradually decreases, the reactivity may be significantly improved; while when the particle size changes slowly or agglomeration occurs, the activity may be inhibited. By combining the above multiple factors, the formula forms a systematic and dynamic framework for describing the activity of powders. In practical applications, this formula can be used to monitor the activity changes of powders in real time and optimize the operating parameters of processing equipment accordingly. For example, when the activity value When the temperature shows a downward trend over time, , optimize the particle size distribution or regulate the stress field distribution to re-stimulate the activity of the powder; when the activity value stabilizes at a higher level, it indicates that the current processing conditions are close to the optimal state.

[0048] Example 10: The activity enhancement value was calculated by the following formula: ; in, is the system stability value; the parameters of the processing equipment are adjusted by feedback through the following formula: ; in, The target rotary kiln temperature is adjusted; The grinding speed of the target ball mill is adjusted.

[0049] Specifically, each element in the determinant, such as , which represents the second-order response of the powder activity to the critical temperature of phase change, that is, The sensitivity of the change to the activity. When the value is large, it indicates The change of has a significant effect on improving activity; on the contrary, a smaller value indicates Similarly, the cross-partial derivatives (such as ) reflects the synergistic effect of the two variables. For example, when the coupling effect between the phase transition critical temperature and the Si-Al-O complex concentration is significant, the activity enhancement value This synergistic effect is particularly important in the treatment of construction solid waste powder, because the optimal performance of the system often depends on the linkage adjustment of multiple parameters. Corrected the limiting effect of activation energy on system activity. It reflects the energy threshold of chemical reaction. Higher activation energy will inhibit the rapid enhancement of powder activity, while the critical temperature of phase change The increase of can reduce this inhibitory effect. This correction term ensures that the calculation of the activity enhancement value can truly reflect the activity change of the system under thermodynamic conditions. In addition, The term introduces the direct effect of the dynamic change of particle size time distribution on the activity enhancement value. Faster particle size change usually corresponds to higher reaction activity, because the reduction of particle size increases the specific surface area, thus providing more active sites for chemical reactions. The introduction of this term makes the calculation of the activity enhancement value not only limited to thermodynamic and chemical factors, but also considers the role of particle size optimization in promoting system performance. By calculating the activity enhancement value , the formula further realizes the feedback adjustment of the processing equipment parameters. Adjustment formula It shows that the adjustment of rotary kiln temperature and ball mill grinding speed is based on the activity enhancement value. When the value is high, the system tends to maintain the current parameter settings or make fine adjustments; When the value is low, the system may need to significantly adjust the temperature or grinding speed to stimulate the activity of the powder. The linear structure of the adjustment formula makes the adjustment process highly flexible and controllable, while ensuring the real-time and stability of the system response. This feedback adjustment mechanism is of great significance in the treatment of construction solid waste powder. First, through dynamic monitoring and adjustment, the system can adapt to changes in powder characteristics or external conditions in real time, thereby maintaining a high treatment efficiency. For example, when the chemical composition or particle size distribution of the powder changes, the calculation of the activity enhancement value can quickly reflect this change and adapt to the new conditions by adjusting the equipment parameters. Secondly, this mechanism can significantly improve the energy efficiency and resource utilization of the system. By optimizing the temperature and grinding speed, the system can maximize the activity with minimum energy consumption and reduce resource waste.

[0050] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those 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 thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Construction solid waste powder activity enhancement system based on thermodynamics and particle size control, characterized in that: The system comprises: a treatment device for treating construction solid waste powder and an automatic control part for controlling the operation of the treatment device; the automatic control part comprises: a thermodynamic control unit, a particle size optimization and interface coupling unit, a microscopic reconstruction unit and a system stability and activity characterization unit; the thermodynamic control unit is used to analyze the thermodynamic properties of the construction solid waste powder, determine its reaction activation energy, and simultaneously construct a spatial temperature field to predict the phase change critical temperature of the construction solid waste powder; the particle size optimization and interface coupling unit is used to establish a particle size evolution kinetic equation based on the spatial temperature field and the phase change critical temperature, describe the time evolution of the particle size distribution, solve the particle size evolution kinetic equation, and obtain the particle size time distribution; according to the particle size time distribution, combined with the spatial temperature field and the phase change critical temperature, The critical temperature is changed, an interfacial reaction kinetic model is established, the surface interaction and energy exchange of construction solid waste powder during the chemical reaction are simulated, the interfacial reaction kinetic model is solved, and the concentration of silicon-aluminum-oxygen complex is obtained; the microscopic reconstruction unit is used to construct a microstructure reconstruction equation based on a free energy-driven kinetic model, solve the microstructure reconstruction equation, and obtain the density distribution of construction solid waste powder; according to the density distribution, a stress field induced activation equation is established, and the stress tensor is calculated; the system stability and activity characterization unit is used to calculate the powder activity at each time according to the silicon-aluminum-oxygen complex concentration, stress tensor, density distribution and particle size time distribution, and calculate the activity enhancement value, and based on the activity enhancement value, the parameters of the processing equipment are feedback-adjusted.

2. The construction solid waste powder activity enhancement system based on thermodynamics and particle size control as claimed in claim 1, characterized in that: The processing equipment includes: a rotary kiln and a ball mill; the rotary kiln is used to calcine the construction solid waste powder at high temperature, and then transmit the high-temperature calcinated construction solid waste powder to the ball mill; the ball mill grinds the high-temperature calcinated construction solid waste powder to obtain ground construction solid waste powder; the parameters of the processing equipment include: the temperature of the rotary kiln and the grinding speed of the ball mill.

3. The construction solid waste powder activity enhancement system based on thermodynamics and particle size control as claimed in claim 2, characterized in that: Reaction activation energy Calculated by the following formula: ； in, is the number of chemical bonds that need to be calculated in construction solid waste powder, ranging from 2 to 5; is an integer subscript index; is Planck's constant; For the The average moment of inertia of the atoms involved in the chemical bond, , , and They are The mass of the atoms at both ends of a chemical bond; For the The length of the chemical bond; is the silicon-oxygen bond length; is the aluminum-oxygen bond length; is Avogadro's constant; For the The average effective nuclear charge of the atoms involved in the chemical bond; is the dielectric constant of vacuum.

4. The construction solid waste powder activity enhancement system based on thermodynamics and particle size control as claimed in claim 3, characterized in that: The phase transition critical temperature is calculated by the following formula: ； in, is the phase change enthalpy change of construction solid waste powder; is the specific heat capacity at constant pressure of construction solid waste powder; It is the mixed entropy change of construction solid waste powder; is the current temperature of the rotary kiln; is the initial temperature; is the gas constant; is the critical temperature of phase change of construction solid waste powder.

5. The construction solid waste powder activity enhancement system based on thermodynamics and particle size control as claimed in claim 3, characterized in that: The particle size evolution kinetic equation is expressed by the following formula: ； in, is the particle size time distribution, which describes the particle size The particles of construction solid waste powder are The quantity distribution of time; is the effective diffusion coefficient at the critical temperature; is the Laplace operator; is the molar volume; is the surface tension, ranging from ; ,in, is the pre-factor, and its value range is ; is the diffusion activation energy, and its value range is ; is the current grinding speed of the ball mill.

6. The construction solid waste powder activity enhancement system based on thermodynamics and particle size control as claimed in claim 5, characterized in that: The interface reaction kinetics model is established by the following formula based on the particle size time distribution, combined with the spatial temperature field and the critical temperature of phase change: ； in, is the concentration of silicon-aluminum-oxygen complex; is the particle size distribution function, ;in, is the mean particle size; is the particle size standard deviation.

7. The construction solid waste powder activity enhancement system based on thermodynamics and particle size control as claimed in claim 6, characterized in that: The microstructure reconstruction equation is expressed by the following formula: ； in, is the atomic mobility at the critical temperature; is the gradient operator; Atomic diffusion activation energy, ranging from 80 to 120.

8. The construction solid waste powder activity enhancement system based on thermodynamics and particle size control as claimed in claim 7, characterized in that: The stress field induced activation equation is established according to the density distribution through the following formula, and the stress tensor is calculated: ； in, for Stress tensor of time; for The volume of construction solid waste powder at that time; is the volume of construction solid waste powder at the initial time; is the Poisson's ratio of construction solid waste powder.

9. The construction solid waste powder activity enhancement system based on thermodynamics and particle size control as claimed in claim 8, characterized in that: The powder activity at each time is calculated by the following formula: ； in, for Time powder activity.

10. The construction solid waste powder activity enhancement system based on thermodynamics and particle size control as claimed in claim 9, characterized in that: The activity enhancement value was calculated using the following formula: ； in, is the system stability value; the parameters of the processing equipment are adjusted by feedback through the following formula: ； in, The target rotary kiln temperature is adjusted; The grinding speed of the target ball mill is adjusted.

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