A purity precision control method for high-purity cinnabar production process

Abstract

This invention relates to the fields of industrial control and chemical metallurgical automation, and discloses a method for precise control of purity in the production process of high-purity lead oxide. The method involves closed-loop temperature control of the outer shield layer of the phase boundary induction center within the solid-liquid phase transition range, generating a pure lead isolation membrane. Based on the lower limit threshold of the Weber number in fluid dynamics, an inlet pressure command is calculated to drive fluid through the vapor film layer, and the first derivative sequence of temperature rise is extracted in real time. When the derivative falls below the stagnation threshold, alternating electromagnetic frequency sweep and pulsed fluid jet commands are simultaneously issued to target and excite thermal expansion and contraction stresses inside and outside the unreacted lead core. This invention utilizes opposing shear couples to achieve physical peeling of the product shell, solving the problem of control variable divergence caused by microscopic stagnation, and improving conversion purity and equipment safety.

Description

Technical Field

[0001] This invention relates to the fields of industrial control and chemical metallurgical automation technology, and in particular to a method for precise control of purity in the production process of high-purity litharge. Background Technology

[0002] In existing technologies for preparing high-purity lead monoxide (lead oxide), the oxidation reaction of metallic lead typically employs a physical control framework combining isothermal heating and mechanical stirring. Under high-temperature oxidation conditions, an oxidation phase transition occurs on the surface of the molten lead, forming a dense lead monoxide product shell. This shell constitutes a physical diffusion barrier for oxygen on the surface of the microparticles. Simultaneously, when a fluid medium is injected into the reaction system, the Leidenfrost effect occurs on the high-temperature material surface, forming a vapor film layer at the microscopic gas-liquid interface. This vapor film layer at the microscopic gas-liquid interface further overlaps to construct a microscopic thermal resistance barrier.

[0003] The aforementioned microscopic thermo-mass barrier, formed by the interweaving of the lead monoxide product shell and the vapor film layer at the microscopic gas-liquid interface, shields macroscopic spatial feedback, causing the control system to generate an unconstrained divergent response of the control variables when the oxidation reaction falls into chemical stagnation. In the thermodynamic domain, the control loop indeterminately amplifies the external heating power, leading to localized heat accumulation in the material and triggering an excessive oxidation phase transition, generating red lead impurities. In the hydrodynamic domain, the control loop indeterminately opens the loop to amplify the fluid injection pressure, causing cavitation bursts at the microscopic interface. The cavitation shock waves penetrate the flow field boundary and induce mechanical fatigue wear of the materials inside the reactor. This dual thermo-mass barrier at the microscopic scale, overlapping along the control link, evolves into macroscopic localized thermal runaway and physical defense degradation, resulting in a mutually constraining boundary between the red lead product purity conversion rate and the operational safety of the equipment in existing control technologies. Summary of the Invention

[0004] This invention provides a method for precise control of purity in the production process of high-purity lead oxide, in order to solve the technical problem that the existing control system shields macroscopic perception under the dual thermo-mass barrier of the micro-particle shell and the gas-liquid vapor film layer, resulting in unconstrained divergent response of control variables, which in turn leads to thermodynamic over-oxidation and hydrodynamic cavitation wear.

[0005] In view of the above problems, the present invention provides a method for precise control of purity in the production process of high-purity litharge, which is applied to a precision purity control system. The method includes the following data processing and collaborative control steps: Step A: Obtain basic state data of the reaction vessel. When it is determined that the preconditions for melting and heating are met, send a medium temperature control command to the outer shield layer of the phase boundary induction center connected in communication, so as to control the surface temperature of the outer shield layer of the phase boundary induction center within the preset solid-liquid phase transition temperature range and maintain the formation state of the pure lead isolation membrane. Step B: After the system enters the reaction stage, the basic state parameters of the mixed fluid in the inner phase change layer of the phase boundary induction center are obtained; based on the preset lower limit threshold of the fluid dynamics Weber number, the intake pressure regulation command is calculated and output to the gas path actuator to drive the fluid droplets injected from the inner phase change layer of the phase boundary induction center to penetrate the vapor film layer of the micro gas-liquid interface. The time-series temperature data of the material in the reaction vessel is collected synchronously, and the time-series sequence of the first derivative of temperature rise is calculated and generated in real time based on the time-series temperature data. The time-series sequence of the first derivative of temperature rise includes the absolute value of the current derivative. Step C: Use the time sequence of the first derivative of the temperature rise as the sole decision input to trigger the control state transition; When the absolute value of the current derivative in the time series of the first derivative of the temperature rise is detected to fall below the pre-calibrated reaction retardation threshold, it is determined that a product shell encapsulating the unreacted lead metal core has been generated in the reaction vessel, and an alternating electromagnetic sweep frequency command and a pulsed fluid jet command are simultaneously sent to the phase boundary induction center. The alternating electromagnetic sweep command is used to drive the middle wave-transparent sensing layer of the phase boundary induction center to radiate an alternating electromagnetic field, so as to target and excite thermal expansion stress inside the product shell; the pulsed fluid jet command is used to drive the inner phase change layer of the phase boundary induction center to target and excite cold contraction stress outside the product shell.

[0006] This invention provides a system for precise purity control in the production process of high-purity litharge. As a virtual device entity for implementing the above method, the system for precise purity control includes: The topology isolation control module is used to acquire basic state data of the reaction vessel and output medium temperature control commands when it is determined that the preconditions for melting and heating are met, so as to maintain the formation state of the pure lead isolation membrane. The fluid dynamics solution module is used to calculate and output intake pressure regulation commands based on the lower limit threshold of the fluid dynamics Weber number. The time-series feature extraction module is used to generate a time-series sequence of the first derivative of temperature rise in real time based on the collected time-series temperature data. The time-series sequence of the first derivative of temperature rise includes the absolute value of the current derivative. The stress boundary execution module is used to take the time sequence of the first derivative of the temperature rise as the transition trigger decision input. When the absolute value of the current derivative falls below the pre-calibrated reaction retardation threshold, the module calculates the reverse stress pump intensity based on the mass transfer retardation saturation and lattice embrittlement abrupt change potential through the stress boundary coupling algorithm, and synchronously outputs alternating electromagnetic sweep frequency command and pulsed fluid jet command according to the reverse stress pump intensity.

[0007] This invention provides an electronic device, comprising: At least one processor; and a memory communicatively connected to the at least one processor; The memory stores computer program instructions that can be executed by the at least one processor, which are then executed by the at least one processor to enable the at least one processor to perform the above-described method for precise control of purity in the production process of high-purity lead oxide.

[0008] This invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the above-described method for precise purity control in the production process of high-purity litharge.

[0009] The technical solution provided in this application has at least the following technical effects: By controlling the surface temperature of the outer shield layer of the phase boundary induction center within a closed loop within the solid-liquid phase transition temperature range, a pure lead insulating membrane is generated. The latent heat of phase transition of the pure lead insulating membrane is used to absorb the mechanical impact energy generated by the cavitation and bursting of fluid droplets, blocking the transmission path of the shock wave to the inner metal wall of the reaction vessel and preventing physical wear of the equipment hardware.

[0010] By combining the lower threshold of the Weber number in fluid dynamics, the density of the cooling medium, the surface tension, and the calibrated droplet size to calculate the target flow velocity in reverse, the fluid droplets are endowed with the physical inertial kinetic energy to disrupt the vapor film at the microscopic gas-liquid interface. This eliminates the mass transfer blockage caused by the Leidenfrost effect and establishes a direct liquid-solid heat exchange channel.

[0011] By responding to the drop in the absolute value of the current derivative in the first derivative sequence of temperature rise, alternating electromagnetic sweep commands and pulsed fluid jet commands are issued simultaneously. Utilizing the outward expansion thermal stress excited inside the unreacted lead core by alternating electromagnetic waves and the inward contraction stress excited by the rapid cooling of the external fluid, a pair of opposing mechanical shear forces is constructed, inducing the physical exfoliation of the lead monoxide product shell and restoring the oxygen diffusion channels of the unreacted lead core.

[0012] By mapping the mass transfer saturation and lattice embrittlement abrupt change potential using a function model with asymptotic saturation and step change characteristics, and performing product-type control coupling superposition calculations based on the reference excitation intensity, the upper limit truncation effect of the underlying function is used to cut off the divergent amplification path of the control command caused by reaction deadlock, constraining the control current within a safe setting threshold and avoiding overload breakdown of high-power electrical equipment. Attached Figure Description

[0013] Figure 1 A flowchart illustrating a method for precise purity control in the production process of high-purity litharge, provided in an embodiment of the present invention; Figure 2 This is a system architecture diagram for precise purity control in the production process of high-purity litharge, provided as an embodiment of the present invention. Detailed Implementation

[0014] The above technical solutions will now be described in detail with reference to the accompanying drawings and specific embodiments to provide a better understanding of them. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. It should be understood that the present invention is not limited to the exemplary embodiments used only to explain the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the drawings, not all of them.

[0015] Example: Please refer to Figure 1 and Figure 2The physical topology of the purity precision control system's hardware operating environment is established by the industrial control computer, which serves as the core processing node. Along with the initialization of the underlying protocol, the industrial control computer establishes a bidirectional electrical communication connection with the sensor network, pneumatic actuators, and RF power generator deployed in the industrial field. Analog signals sampled by the sensor network in the physical space are converted into discrete digital sequences and flow into the industrial control computer's memory stack. Simultaneously, the industrial control computer converts the digital instructions output by the central processing unit into analog voltage signals and injects them into the pneumatic actuators and RF power generator. The industrial control computer, sensor network, pneumatic actuators, and RF power generator converge and connect to the physical terminal. The physical terminal has a three-dimensional nested coaxial structure, with the following layers nested from the inside out: an inner phase transition layer of the phase boundary induction center, a middle wave-transparent sensing layer of the phase boundary induction center, and an outer shield layer of the phase boundary induction center. For example, in one specific implementation architecture, the industrial control computer consists of a programmable logic controller (PLC) running a real-time operating system. The sensor network includes a metal-clad thermocouple matrix and Coriolis mass flow meters inserted through the interior of the reaction vessel. The pneumatic actuator includes a high-frequency electromagnetic proportional control valve, and the radio frequency power generator includes a high-power solid-state microwave RF source. The industrial control computer reads the low-level signal output from the metal-clad thermocouple matrix via an analog-to-digital converter through an Ethernet fieldbus protocol. The industrial control computer directly outputs a 4-20mA standard industrial control current signal to the high-frequency electromagnetic proportional control valve and the high-power solid-state microwave RF source. This standard industrial control current signal drives the mechanical valve core displacement of the high-frequency electromagnetic proportional control valve and adjusts the duty cycle of the excitation power of the high-power solid-state microwave RF source.

[0016] Once the hardware-level handshake of the purity precision control system is completed, the purity precision control method for the high-purity lead oxide production process is triggered and executed. The advancement of this method depends on the time-dependent chain of data flow. Initially, the method enters a topological isolation control state driven by phase equilibrium criticality. Within this state, basic state data of the reaction vessel is acquired, and when the preconditions for melting and heating are met, a medium temperature control command is output, maintaining the formation state of the pure lead isolation membrane. As the thickness of the pure lead isolation membrane tends to stabilize dynamically, the control flow of the high-purity lead oxide production process transitions to a state of fluid dynamics calculation and feature sequence extraction. When in the state of fluid dynamics calculation and feature sequence extraction, the basic state parameters of the mixed fluid in the inner phase change layer input to the phase boundary induction center are acquired. The basic state parameters of the mixed fluid, combined with the lower limit threshold of the fluid dynamics Weber number, are used to calculate the output inlet pressure regulation command. Simultaneously, the time-series temperature data of the material in the reaction vessel is collected, and the time-series sequence of the first derivative of temperature rise is calculated based on the time-series temperature data. The time-series sequence of the first derivative of temperature rise includes the absolute value of the current derivative. When the absolute value of the current derivative in the time-series sequence of the first derivative of temperature rise falls below the pre-calibrated reaction retardation threshold, the data stream interrupts the fluid dynamics calculation and feature sequence extraction state. The high-purity lead oxide production process purity precision control method triggers the differential mutation-driven reverse stress pump control state, and simultaneously issues alternating electromagnetic sweep frequency command and pulsed fluid jet command to the phase boundary induction center to complete the stress tearing operation of the product shell encapsulating the unreacted lead metal core.

[0017] To execute the topological isolation control step driven by phase equilibrium criticality, the industrial control computer reads the basic state data of the reaction vessel. When the basic state data satisfies the preconditions for melting and heating, the industrial control computer issues a medium temperature control command to the outer shield layer of the phase boundary induction center via communication. The numerical calculation of the medium temperature control command is coupled to the solid-liquid phase transition thermodynamic model of metallic lead. The critical temperature point for the solid-liquid phase transition of pure metallic lead is 327℃. The industrial control computer defines the 327℃ critical temperature point as the negative feedback deviation pole in its proportional-integral-derivative (PID) control logic. Through continuous integral operations of the PID control logic, the industrial control computer calculates the heat removal rate of the cooling medium outside the outer shield layer of the phase boundary induction center. The heat removal rate is mathematically balanced with the latent heat of phase transition released when the metallic lead on the surface of the outer shield layer of the phase boundary induction center changes from a molten liquid state to a solid lattice. This establishes a closed-loop control of the surface temperature of the outer shield layer of the phase boundary induction center within the preset solid-liquid phase transition temperature range, maintaining the formation state of the pure lead isolation membrane.

[0018] The formation state of the pure lead isolation membrane is controlled within a preset solid-liquid phase transition temperature range, which is defined as the preset temperature range below the critical temperature point of the solid-liquid phase transition. Constraining the surface temperature of the outer shield layer of the phase boundary induction center within this range characterizes the pure lead isolation membrane that physically crystallizes on the surface of the outer shield layer of the phase boundary induction center and is maintained within a thickness range specified according to the cavitation shock wave protection requirements. This pure lead isolation membrane within this thickness range acts as a physical topological isolation entity, blocking the physical wear of the stainless steel raw material of the outer shield layer of the phase boundary induction center by the mechanical shock wave generated by the cavitation burst of fluid droplets in subsequent steps. When external environmental disturbances cause the surface temperature of the outer shield layer of the phase boundary induction center to drift upwards and approach 327°C, the latent heat buffering effect of metallic lead decreases, the crystallization thickness of the pure lead isolation membrane approaches 0 mm, and the pure lead isolation membrane undergoes dissolution and detachment, exposing the outer shield layer of the phase boundary induction center to the physical wear environment of the cavitation shock wave. When the surface temperature of the outer shield layer of the phase boundary induction center drifts downward and approaches a low-temperature zone below the preset temperature range, the material in the reaction vessel solidifies and agglomerates due to the increased temperature gradient of heat conduction at the solid-liquid interface, causing the physical stirring system to seize up. Setting the preset solid-liquid phase transition temperature range below the critical solid-liquid phase transition temperature maintains the pure lead insulating membrane in a thermodynamic dynamic cycle of surface melting and underlying recrystallization, thereby maintaining a constant macroscopic thickness of the pure lead insulating membrane.

[0019] As the thickness of the pure lead isolation membrane tends to stabilize dynamically, the control flow of the data-driven high-purity lead oxide production process's purity precision control method enters the fluid dynamics calculation and feature sequence extraction steps. The industrial control computer acquires the fundamental state parameters of the mixed fluid in the inner phase change layer, input to the phase boundary induction center. The physical calculation of the fundamental state parameters of the mixed fluid is related to the microscopic thermodynamic Leiden-Frost effect. When the mixed fluid is sprayed and comes into contact with materials in a high-temperature reaction vessel, the surface of the mixed fluid vaporizes and forms a vapor film layer at the microscopic gas-liquid interface. This vapor film layer possesses thermal blocking characteristics. When the kinetic energy of the fluid droplet approaches zero, the mechanical kinetic energy carried by the fluid droplet is lower than the surface tension of the mixed fluid itself. The fluid droplet is ejected by the vapor film layer, resulting in the interruption of the direct liquid-solid heat transfer physical path. The central processing unit of the industrial control computer incorporates a fluid dynamics Weber number constraint mechanism. The fluid dynamics Weber number characterizes the ratio of the physical inertial force of the fluid droplet to its surface tension. The industrial control computer extracts the lower limit threshold of the Weber number, calibrated based on the critical condition of the droplet's kinetic energy penetrating the vapor film layer. By setting the fluid dynamics Weber number to be no less than the lower threshold, the physical inertial kinetic energy carried by the fluid droplet exceeds the rebound point of the fluid surface tension. The fluid droplet deforms at the contact boundary and penetrates the vapor film layer of the microscopic gas-liquid interface, establishing a liquid-solid mass transfer and heat exchange channel.

[0020] Based on the lower limit threshold of the Weber number, the industrial control computer enters the reverse calculation logic stage to determine the target flow velocity required to maintain the kinetic energy of the fluid droplets penetrating the vapor film. The industrial control computer retrieves the cooling medium density and surface tension of the mixed fluid from the system's pre-stored data and simultaneously acquires the calibrated droplet size of the mixed fluid, which maps to the ultrasonic initiation frequency. Combining the constraints of the positive correlation between the Weber number and the square of the cooling medium density and flow velocity, and the negative correlation between droplet size and surface tension, the industrial control computer reverse-calculates and derives the target flow velocity required to maintain the kinetic energy of the fluid droplets penetrating the vapor film. By extracting the target flow velocity and the flow velocity data fed back from the mass flow meter, the industrial control computer generates a control deviation signal and outputs an intake pressure adjustment command. The intake pressure adjustment command is converted into a 0-10V analog control voltage and injected into the electro-proportional regulating valve of the pneumatic actuator. The analog control voltage changes the excitation current of the electromagnetic coil of the electro-proportional regulating valve. The magnetic field generated by the electromagnetic coil excitation current drives the mechanical valve core of the electro-proportional regulating valve to shift, changing the flow cross-sectional area and pressure within the pneumatic pipeline. The pipeline pressure imparts to the fluid droplets at the nozzle of the inner phase change layer an emission velocity that matches the target flow rate.

[0021] As intake pressure regulation commands are continuously sent to the gas path actuators, the industrial control computer synchronously collects the time-series temperature data of the material inside the reaction vessel and calculates and generates a temperature rise first derivative time-series sequence in real time in the arithmetic logic unit based on the time-series temperature data. The temperature rise first derivative time-series sequence contains the absolute value of the current derivative. The temperature rise first derivative time-series sequence serves as the decision input for triggering control state transitions. When the logic gate circuit detects that the absolute value of the current derivative in the temperature rise first derivative time-series sequence falls below a pre-calibrated reaction retardation threshold, the drop in the absolute value of the current derivative indicates an increase in the physical resistance to the diffusion of oxygen from the material inside the reaction vessel into the lead core. Based on the comparison result of the absolute value of the current derivative falling below the reaction retardation threshold, the industrial control computer determines that a product shell encapsulating the unreacted metallic lead core has been generated inside the reaction vessel. Within the clock cycle in which the product shell is determined to have been generated inside the reaction vessel, the industrial control computer synchronously sends alternating electromagnetic sweep frequency commands and pulsed fluid jet commands to the phase boundary induction center, and the data stream jumps into the differential mutation-driven reverse stress pump control step.

[0022] During the execution of the alternating electromagnetic sweep frequency command generation algorithm, the industrial control computer acquires the preset characteristic size range of the unreacted lead core, as well as its resistivity and permeability. Based on the skin effect physical mechanism—a positive correlation between electromagnetic skin depth and the square root solution of resistivity, and a negative correlation between electromagnetic skin depth and the square root solution of the alternating electromagnetic wave angular frequency—the industrial control computer performs inverse numerical calculations to derive the target angular frequency range that allows the electromagnetic wave skin depth penetration distance to cover the characteristic size range of the unreacted lead core. The industrial control computer generates alternating electromagnetic sweep frequency commands within the upper and lower limits of the target angular frequency range. These commands are sent via bus protocol to the RF source control motherboard in the RF power generator, driving the middle layer of the phase boundary induction center to radiate an alternating electromagnetic field with a frequency within the target angular frequency range. The calculation of the target angular frequency range allows the energy of the alternating electromagnetic field to penetrate the product shell, generating eddy current Joule heat loss inside the unreacted lead core, which is converted into volume expansion thermal stress due to the outward expansion of the unreacted lead core.

[0023] The volumetric thermal stress generated by the outward expansion of the unreacted lead core provides expansion tension from the internal physical interface of the product shell to its outer periphery. During the clock cycle that generates the alternating electromagnetic sweep command, the industrial control computer outputs a pulsed fluid jet command. This command alters the closure state of the electromagnetic shut-off valve within the pneumatic actuator, driving the inner phase change layer of the phase boundary induction center to inject a mixed fluid onto the outer surface of the product shell. The injected mixed fluid contacts the high-temperature product shell, and the vaporization phase change endothermic effect of the mixed fluid absorbs the enthalpy of the product shell surface, causing a temperature drop. This temperature drop triggers volume contraction at the product shell's lattice level, inducing cold contraction stress towards the core. According to the Griffith lattice micro-fracture mechanics model, the volumetric thermal stress induced outward by the unreacted lead core and the cold contraction stress induced inward by the product shell spatially superimpose at the product shell's boundary. As the angular frequency of the alternating electromagnetic wave approaches infinity, its electromagnetic skin depth approaches zero. Electromagnetic energy is impeded at the surface of the product shell, preventing the establishment of thermal stress due to bulk expansion within the unreacted lead core, leading to an imbalance of forces within and outside the product shell. By introducing the target angular frequency range derived from the skin effect inverse solution, the electromagnetic skin depth is maintained within the unreacted lead core, causing the outward thermal stress of bulk expansion and the inward contraction stress to form opposing shear force pairs. When the vector superposition modulus of the shear force pairs exceeds the physical limit of the inherent lattice binding energy of the product shell, the product shell fractures and peels off, re-exposing the unreacted lead core in the reaction vessel and restoring the channels for oxygen molecules to diffuse deeper into the lattice within the reaction system.

[0024] The shear force couple generated by the outward expansion thermal stress and the inward contraction stress is dynamically calculated by a stress boundary coupling algorithm deployed within the control system, along with the generation of the reverse stress pumping intensity of the alternating electromagnetic sweep frequency command and the pulsed fluid jet command. The industrial control computer reads the current absolute value of the derivative. and the absolute value of the historical peak derivative The decrease in the absolute value of the current derivative, according to Fick's first law of diffusion, characterizes the degree to which the diffusion path of oxygen molecules from the material in the reaction vessel into the unreacted lead nucleus is blocked by the product shell. Industrial control computers utilize function models with asymptotic saturation characteristics to generate mass transfer saturation, which characterizes the degree of mass transfer obstruction. The calculation formula is as follows: In this calculation path, the industrial control computer extracts the absolute value of the historical peak derivative. with the absolute value of the current derivative The difference is divided by the absolute value of the historical peak derivative. With system tolerance constant The arithmetic sum is used to generate a division quotient and multiplied by a preset third control weight parameter. Product input hyperbolic tangent function Operator unit, output mass transfer saturation Floating-point eigenvalues.

[0025] In a parallel processing thread independent of the mass transfer saturation calculation, the industrial control computer's internal timer accumulates the dwell time of a low derivative state where the absolute value of the current derivative remains below the reaction saturation threshold. The industrial control computer synchronously retrieves the calibrated critical fracture time constant. and the preset fourth control weight parameter A lattice embrittlement abrupt change potential characterizing the probability of lattice breakage is generated by mapping a function model with step-abrupt characteristics. The calculation formula is as follows: Industrial control computers will have low derivative state dwell time With the critical time constant of fracture The difference is multiplied by the preset fourth control weight parameter. After the negative value, input the natural exponential function. The calculation is performed by adding 1 to the result of the natural exponential function and taking its reciprocal, outputting the lattice embrittlement abrupt change potential. .

[0026] When mass transfer saturation is impeded With lattice embrittlement abrupt change potential After being pushed into the register, the industrial control computer executes product-type control coupled superposition logic. Reverse stress pump intensity. The calculation formula is: Industrial control computer extracts reference excitation intensity command value Mass transfer saturation will be impeded. Multiplied by the preset first control weight parameter Construct the amplitude gain factor. Apply the lattice embrittlement abrupt change potential. Multiplied by the preset second control weight parameter The result is then fed into the natural exponential calculator, which outputs the exponential mutation factor. The industrial control computer multiplies the amplitude gain factor and the exponential mutation factor, then adds them together with a constant 1, and finally performs a product-type control coupling superposition with the reference excitation intensity command value to output the inverse stress pump intensity. The digital sequence word triggers the operation of the digital-to-analog converter circuit, which outputs a control current pulse to drive the physical hardware.

[0027] The calculation of the reverse stress pump intensity relies on boundary constraints using a series of control weight parameters within a physical calibration domain. The fracture critical time constant is stored in the engineering configuration table and calibrated to a corresponding time interval based on the sum of the longest disturbance period of the stirring blades inside the reaction vessel and the thermal response time constant of the thermocouple hot junction. Anchoring the fracture critical time constant within this time interval, a time-integral filtering logic is established in the control system. This logic filters out transient temperature spikes caused by periodic mechanical cutting of the fluid, blocks level signal jumps, and thus prevents the calculation of the reverse stress pump intensity from being triggered by non-chemical kinetic factors.

[0028] A preset third control weight parameter controls the mapping amplitude of the slope of the hyperbolic tangent function curve, and a preset fourth control weight parameter controls the step amplitude of the lattice embrittlement abrupt change potential function curve. The preset third control weight parameter is configured within a first scalar interval calibrated according to the system's required saturation response speed, and the preset fourth control weight parameter is calibrated within a second scalar interval calibrated according to the steepness requirement of the abrupt change step, and this fourth control weight parameter has the reciprocal dimension of time. When the residence time of the low derivative state accumulates along the positive direction of the time axis, the step calculation logic of the fourth control weight parameter converges the value space of the lattice embrittlement abrupt change potential and maintains it at the upper limit of the function value of 1, so that the exponential change factor is enveloped by the top of the function after crossing the critical time node, maintaining the instantaneous impact mechanical energy applied to the internal components of the reactor within the envelope set by the system.

[0029] The product-type control coupling superposition calculation of the reverse stress pump intensity includes boundary convergence conditions in the logic unit. When the purity precision control system in the high-purity lead oxide production process is in the cold start-up phase or encounters a communication interruption, the absolute value of the historical peak derivative shifts towards 0. To avoid triggering the division-by-zero hardware abnormal interrupt level, the instruction set extracts the system tolerance constant before performing the division operation. This system tolerance constant is calibrated as a positive real number tolerance quantity based on the lower limit of the underlying floating-point arithmetic precision and has the same unit dimension as the first derivative of the temperature rise. The arithmetic logic unit performs a floating-point addition operation on the absolute value of the historical peak derivative and the system tolerance constant, generating a denominator base that is always greater than 0, maintaining the continuous level switching of the system arithmetic bus. For example, in a specific underlying code architecture, the system tolerance constant is pre-programmed as a floating-point value of 0.01. The arithmetic logic unit performs a floating-point addition logic instruction on the absolute value of the historical peak derivative and the system tolerance constant, generating a denominator base that is always greater than 0. The denominator base ensures that the arithmetic logic unit can output a clear floating-point quotient value in the initial 0 state or in a stagnant physical condition. The denominator base maintains the continuous level flipping cycle of the underlying system's operation bus, giving the product-type control-coupled superposition calculation anti-collapse properties in complex electromagnetic interference industrial field environments.

[0030] As the denominator base is generated, the floating-point quotient is input into the hyperbolic tangent function operator unit. When the reaction system enters a reaction stagnation state, the absolute value of the current derivative approaches 0, and the arithmetic difference between the absolute value of the historical peak derivative and the absolute value of the current derivative increases, causing the independent variable of the hyperbolic tangent function to evolve in the positive direction. The hyperbolic tangent function has a convergent domain boundary, and its output value is limited and converges to the upper limit value of 1. The mass transfer saturation is constrained to the upper limit by the truncation logic of the hyperbolic tangent function and does not diverge with the increase of the independent variable. The mathematical convergence characteristics of the mass transfer saturation avoid the command divergence amplification caused by the closed loop of the control loop due to the reverse stress pump intensity, constrain the control current pulse below the set baseline, and eliminate the risk path of overheating and damage to RF components due to receiving continuously amplified commands.

[0031] To execute stress-boundary coupling algorithms at the physical level of the basic microprocessor, the mapping calculation of mass transfer resistance saturation and lattice embrittlement abrupt change potential can be converted into a fixed-point arithmetic execution path. For control scenarios without hardware floating-point units, industrial control computers use programmable logic controllers (PLCs) with only basic arithmetic logic units as an alternative. The PLC reads a discrete data lookup table (DLA) stored in memory sectors via an on-chip bus. The DLA contains a discrete integer mapping matrix of the hyperbolic tangent function and the natural exponential function. The PLC extracts the discrete integer bits of the input parameters, retrieves adjacent upper and lower bound reference integer points from the DLA, and activates the basic multiplier and adder gates to perform fixed-point integer linear interpolation. The fixed-point integer linear interpolation outputs a fixed-point control word, establishing a fixed-point execution path independent of the floating-point function library.

[0032] There is an alternative mapping method for calculating mass transfer saturation. Input parameters, including the absolute value of the current derivative and the absolute values ​​of historical peak derivatives, are extracted. The processor replaces the hyperbolic tangent function logic operator with arctangent function logic operations or rational algebraic fraction operations. Under reaction stagnation conditions, as the absolute value of the current derivative approaches 0, the independent variable of the arctangent function or algebraic fraction operation evolves in the positive direction. The output value generated by the arctangent function or algebraic fraction operation is converged by the function model and fits the horizontal asymptote, outputting an equivalent value with an upper limit on the numerical boundary. This constructs a constraint boundary at the logic gate level to prevent control command divergence, and together with the hyperbolic tangent function model, it helps prevent microwave RF components from overheating due to command out-of-bounds errors.

[0033] For the step mapping step of the lattice embrittlement abrupt change potential, the processor calls the standard logistic function module instead of the natural exponential step architecture. When the residence time of the low derivative state exceeds the critical time constant boundary of fracture, the numerical curve output by the logistic function module produces a step response, and smoothly converges to the upper limit value of 1 after crossing the threshold point. Both the standard logistic function module and the natural exponential step architecture output the corresponding instruction digital stream sequence during the execution of the trigger decision condition.

[0034] The output of the reverse stress pump intensity digital sequence word is connected to the industrial control computer architecture of the physical electronic device. The motherboard of the industrial control computer carries a microprocessor architecture, which connects the memory hardware and the industrial fieldbus interface board via bus pins. Exemplarily, in a specific field electrical-grade implementation topology, the industrial fieldbus interface board includes an analog output channel communication peripheral board with an integrated digital-to-analog converter (DAC) silicon integrated circuit. At the end of the CPU clock cycle in the reverse stress pump intensity and mass transfer resistance saturation calculation step, the microprocessor architecture writes the reverse stress pump intensity digital sequence word in batches into the direct memory access cache register memory address block allocated by the DAC silicon integrated circuit. The DAC silicon integrated circuit captures the reverse stress pump intensity digital sequence word and activates the internal parallel high-precision resistor network array channel. The DAC silicon integrated circuit converts the discrete stepped distribution of the reverse stress pump intensity digital sequence word into a continuously fluctuating 4-20mA standard analog control current signal. A continuously fluctuating 4-20mA standard analog control current signal flows out of the industrial fieldbus interface board. This signal is then injected via an industrial-grade twisted-pair metal-shielded external cable into the intermediate frequency electromagnetic power supply inverter of the RF power generator and the excitation coil control pin of the electro-proportional regulating valve within the pneumatic actuator. At the physical level, this continuously fluctuating 4-20mA standard analog control current signal is converted into electromagnetic energy thrust that drives the intermediate wave-transparent induction layer to perform frequency jumps at the electromagnetic field radiation center, and mechanical kinetic energy thrust that drives the high-pressure mechanical shut-off valve to achieve fluid conduction and physical displacement.

[0035] The control system, through topology isolation control modules defined by functional boundaries, fluid dynamics calculation modules, timing feature extraction modules, and stress boundary execution modules, is compiled and encapsulated into dynamic link library files in machine code instruction form at the underlying memory space of the operating system. During the initialization phase, these dynamic link library files are allocated by the system kernel thread scheduler and loaded into the code segment reserved area of ​​the memory module. When the sensor network generates an interrupt request signal, the CPU's interrupt logic controller suspends the current low-priority thread and jumps the program counter pointer to the memory starting address of the stress boundary execution module. The CPU pushes timing temperature and flow rate data variables onto the data structure in the memory stack area and extracts comparison branch control instructions based on the pushed variables. After writing back the calculation results, the CPU returns control by executing a system-level interrupt return instruction, closing the control instruction link from the data sensing node to the execution dispatch node.

[0036] The set of underlying binary machine code program flow control instructions that drive the physical hardware unit of the central processing unit to continuously and cyclically execute the method of precise control of purity in the production process of high-purity lead oxide is solidified and penetrated by the physical manufacturing equipment or written into the physical transistor oxide layer trapped charge microarray contained in the computer-readable storage medium by the magnetic head.

[0037] For example, in a specific physical network topology for deploying edge computing logic in a manufacturing site, the specific physical carrier engineering form of the computer-readable storage medium includes: a silicon-based read-only memory chip soldered to the bus pins of the printed circuit board motherboard of an industrial control computer via surface mount technology; electrically erasable programmable read-only memory physical sectors specifically designated within the system for long-term non-volatile storage of preset weighted physical parameter floating-point values ​​during power-off hibernation; a cluster of high-speed non-volatile flash memory solid-state drive physical storage disks carrying the hierarchical tree directory of the underlying embedded real-time operating system boot file and the continuous running cache environment of the global industrial configuration software; and a distributed persistent storage cache unit deployed on the industrial Ethernet server side of a remote supercomputing center, distributing data to the local software edge virtual containers via downstream LANs. The microscopic physical charge polarity space high and low level arrangement spectrum of the macroscopic carrier of the computer-readable storage medium's internal storage array physically constrains the execution timing of each step of the underlying physical logic of the data processing operation steps in the high-purity lead oxide production process, constraining the precise control of purity. The physical hardware entity of the computer-readable storage medium provides the system with storage support for execution instructions to prevent internal control program pointer addressing errors in response to industrial field conditions.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for precise purity control in the production process of high-purity litharge, which is applied to a precision purity control system, characterized in that, The method includes the following data processing and collaborative control steps: Step A: Obtain basic state data of the reaction vessel. When it is determined that the preconditions for melting and heating are met, send a medium temperature control command to the outer shield layer of the phase boundary induction center connected in communication, so as to control the surface temperature of the outer shield layer of the phase boundary induction center within the preset solid-liquid phase transition temperature range and maintain the formation state of the pure lead isolation membrane. Step B: After the system enters the reaction stage, the basic state parameters of the mixed fluid in the inner phase change layer of the phase boundary induction center are obtained; based on the preset lower limit threshold of the fluid dynamics Weber number, the intake pressure regulation command is calculated and output to the gas path actuator to drive the fluid droplets injected from the inner phase change layer of the phase boundary induction center to penetrate the vapor film layer of the micro gas-liquid interface. The time-series temperature data of the material in the reaction vessel is collected synchronously, and the time-series sequence of the first derivative of temperature rise is calculated and generated in real time based on the time-series temperature data. The time-series sequence of the first derivative of temperature rise includes the absolute value of the current derivative. Step C: Use the time sequence of the first derivative of the temperature rise as the sole decision input to trigger the control state transition; When the absolute value of the current derivative in the time series of the first derivative of the temperature rise is detected to fall below the pre-calibrated reaction retardation threshold, it is determined that a product shell encapsulating the unreacted lead metal core has been generated in the reaction vessel, and an alternating electromagnetic sweep frequency command and a pulsed fluid jet command are simultaneously sent to the phase boundary induction center. The alternating electromagnetic sweep command is used to drive the middle wave-transparent sensing layer of the phase boundary induction center to radiate an alternating electromagnetic field, so as to target and excite thermal expansion stress inside the product shell; the pulsed fluid jet command is used to drive the inner phase change layer of the phase boundary induction center to target and excite cold contraction stress outside the product shell.

2. The method according to claim 1, characterized in that, The purity precision control system is communicatively connected to a physical terminal for executing the control commands; The physical terminal is a three-dimensional nested coaxial structure, which consists of an inner phase transition layer of the phase boundary induction center, a middle wave-transmitting induction layer of the phase boundary induction center, and an outer shield layer of the phase boundary induction center, arranged sequentially from the inside to the outside. The purity precision control system synchronously outputs the alternating electromagnetic sweep frequency command and the pulsed fluid jet command through a spatially coaxial physical channel to construct a reverse alternating stress field on the target spatial coordinates.

3. The method according to claim 1, characterized in that, Step B, which involves calculating based on a preset lower limit threshold for the fluid dynamics Weber number and outputting an intake pressure regulation command to the pneumatic actuator, specifically includes: The system retrieves the cooling medium density and surface tension of the mixed fluid pre-stored in the system, and obtains the calibrated droplet size of the mixed fluid; Based on the constraint mechanism that the Weber number in fluid dynamics is positively correlated with the square of the density and velocity of the cooling medium and the particle size, and negatively correlated with the surface tension, the target velocity required to maintain the kinetic energy of the fluid droplets penetrating the vapor film is calculated in reverse by combining the density of the cooling medium, the surface tension and the calibrated droplet particle size. Based on the target flow rate and the flow rate data fed back by the flow meter in real time, a control deviation signal is generated, and the intake pressure adjustment command is output.

4. The method according to claim 1, characterized in that, Step C, specifically the step of synchronously issuing alternating electromagnetic sweep frequency commands to the phase boundary induction center, includes: Obtain a preset characteristic size range of the unreacted lead metal core, and obtain the resistivity and permeability of the unreacted lead metal core; Based on the physical mechanism of the skin effect, which shows a positive correlation between electromagnetic skin depth and the square root solution of resistivity, and a negative correlation between electromagnetic permeability and the square root solution of the angular frequency of alternating electromagnetic waves, a reverse calculation is performed to obtain the target angular frequency range that allows the electromagnetic wave skin depth to cover the aforementioned characteristic size range. The alternating electromagnetic sweep command is generated within the corresponding target angular frequency range to convert electromagnetic energy into the volume expansion thermal stress of the unreacted metallic lead core encased in the product shell.

5. The method according to claim 1, characterized in that, In step C, the reverse stress pumping intensity of the alternating electromagnetic sweep frequency command and the pulsed fluid jet command is calculated by the stress boundary coupling algorithm deployed in the purity precision control system. The calculation logic includes: The absolute values ​​of the historical peak derivatives and the current absolute value of the derivatives are obtained from the time series of the first derivative of the temperature rise. A mass transfer saturation degree, which characterizes the degree of mass transfer hindrance, is generated by mapping a function model with asymptotic saturation characteristics that incorporates system tolerance constants and preset third control weight parameters. The dwell time of the low derivative state where the absolute value of the current derivative is continuously below the reaction retardation threshold is obtained, and the calibrated fracture critical time constant is obtained. The lattice embrittlement abrupt change potential characterizing the probability of lattice fracture is generated by mapping a function model with step change characteristics that introduces a preset fourth control weight parameter. Using the mass transfer saturation as the amplitude gain factor and the lattice embrittlement mutation potential as the exponential mutation factor, based on the preset reference excitation intensity, a preset first control weight parameter and a preset second control weight parameter are introduced to perform product-type control coupling superposition, and the reverse stress pump intensity is output.

6. The method according to claim 5, characterized in that, The reverse stress pump intensity The calculation formula is: in: The mass transfer saturation is the mass transfer resistance saturation. , is the lattice embrittlement abrupt change potential; In the formula, The reference excitation intensity; The first control weight parameter; This refers to the second control weight parameter; The third control weight parameter; The fourth control weight parameter has the reciprocal dimension of time; The absolute value of the current derivative; The absolute value of the derivative of the historical peak value; The system tolerance constant having the same dimensions as the absolute value of the current derivative; The dwell time of the low derivative state; The critical time constant for fracture is denoted as .

7. A high-purity lead oxide production process purity precision control system, as a virtual device entity for implementing the method as described in any one of claims 1 to 6, characterized in that, The purity precision control system includes: The topology isolation control module is used to acquire basic state data of the reaction vessel and output medium temperature control commands when it is determined that the preconditions for melting and heating are met, so as to maintain the formation state of the pure lead isolation membrane. The fluid dynamics solution module is used to calculate and output intake pressure regulation commands based on the lower limit threshold of the fluid dynamics Weber number. The time-series feature extraction module is used to generate a time-series sequence of the first derivative of temperature rise in real time based on the collected time-series temperature data. The time-series sequence of the first derivative of temperature rise includes the absolute value of the current derivative. The stress boundary execution module is used to take the time sequence of the first derivative of the temperature rise as the transition trigger decision input. When the absolute value of the current derivative falls below the pre-calibrated reaction retardation threshold, the module calculates the reverse stress pump intensity based on the mass transfer retardation saturation and lattice embrittlement abrupt change potential through the stress boundary coupling algorithm, and synchronously outputs alternating electromagnetic sweep frequency command and pulsed fluid jet command according to the reverse stress pump intensity.

8. An electronic device, characterized in that, include: At least one processor; and a memory communicatively connected to the at least one processor; The memory stores computer program instructions that can be executed by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the high-purity lead oxide production process purity precise control method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to execute the method for precise control of purity in the production process of high-purity litharge as described in any one of claims 1 to 6.

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