A kind of deaerator low temperature reheat steam source pressure regulating system

Abstract

The present application relates to a kind of oxygen-removing device low-temperature reheat steam source pressure regulating system, including entity equipment and control hub in the technical field of thermal power plant cogeneration and boiler bypass heat supply stable pressure regulation and control, entity equipment includes feedforward perception matrix, acoustic muffling flash device, residual waveform sensing node, pneumatic damping valve array and porous jet pipe network.System acquires parameters through feedforward perception matrix, utilizes evolution prediction module to output the space coordinates and pressure wave frequency band of unvaporized water droplet induced flash expansion.Stable pressure intervention module adjusts the physical volume of acoustic muffling flash device according to prediction result and activates microwave phase change excitation field, eliminates pressure pulsation and promotes water droplet instantaneous phase change.At the same time, calculate the antiphase compensation waveform to drive pneumatic damping valve array to implement fluid interference cancellation, smooth steam passes through porous jet pipe network self-excitation oscillation jet injection, eliminate vacuum negative pressure area, prevent oxygen-removing device internal transient water hammer.

Description

Technical Field

[0001] This invention relates to the field of cogeneration and boiler bypass heating and pressure stabilization control technology in thermal power plants, and particularly to a deaerator low-temperature reheat steam source pressure stabilization control system. Background Technology

[0002] The existing steam turbine shutdown and high- and low-pressure bypass combined pressure reduction and capacity expansion heating technology has the following technical pain points: specifically, it addresses the technical pain points of pipeline pressure pulsation caused by the delayed vaporization of desuperheating water after large pressure differential throttling by the high-pressure bypass, resulting in oscillation and uncontrolled operation of the deaerator inlet steam pressure regulating valve and internal transient water hammer. After the high-pressure bypass main valve performs a large-span pressure reduction and throttling action, the desuperheating water injected cannot instantly complete the heat absorption phase change process. Unvaporized water droplets enter the downstream reheat cold section pipeline with the high-speed steam flow and continue to absorb heat. After accumulating heat, delayed flash evaporation occurs, accompanied by a rapid volume expansion, generating alternating pressure waves inside the pipeline, which are transmitted downstream along the pipeline network, causing high-frequency pulsation of global steam pressure. Since the deaerator heating steam inlet pipeline is directly connected to the reheat cold section pipeline, the inlet steam pressure regulating valve is affected by the pulsating pressure and performs frequent compensation actions, exceeding the mechanical response limit and causing the valve core to oscillate and become uncontrolled, resulting in large fluctuations in the flow rate of heating steam entering the deaerator. When fluctuating steam mixes with subcooled water in the deaerator, localized instantaneous condensation occurs, creating a localized vacuum negative pressure zone in the steam space. High-speed backflow of surrounding liquid water fills this vacuum zone, triggering internal transient water hammer. For example, in single-boiler bypass heating operation, when the boiler main steam is throttled and depressurized through the high-pressure bypass valve, a large amount of desuperheating water injected into the bypass enters the reheat cold section pipeline before complete phase change. This results in delayed flash evaporation and alternating pressure waves deep downstream. These high-frequency alternating pressure waves are directly transmitted to the deaerator inlet steam stabilization network. The high-frequency pulsation causes the regulating valve core to move up and down frequently and become uncontrolled. The sudden change in steam flow causes instantaneous condensation and backflow impact in the deaerator water tank, ultimately leading to transient water hammer. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a low-temperature reheat steam source pressure stabilization and control system for deaerators. This invention solves the technical problem of pressure pulsation in the pipeline network caused by the delayed vaporization of desuperheating water after high bypass pressure differential throttling, resulting in oscillation and uncontrolled operation of the deaerator inlet steam pressure stabilization regulating valve and internal transient water hammer.

[0004] To solve the above-mentioned technical problems, the specific contents of the present invention are as follows: The present invention provides a deaerator low-temperature reheat steam source pressure stabilization and control system, including physical equipment and a control center. The physical equipment includes a feedforward sensing matrix, an acoustic silencing flash evaporation device, a residual waveform sensing node, a pneumatic damping valve array, and a porous jet pipeline network. A feedforward sensing matrix is ​​arranged along the pipeline from the desuperheating water inlet to the reheat cold section; an acoustic silencing flash evaporator is connected in series between the reheat cold section pipeline and the main steam inlet of the deaerator; a residual waveform sensing node is set in the reheat cold section pipeline downstream of the acoustic silencing flash evaporator; a pneumatic damping valve array is installed on the main steam inlet of the deaerator downstream of the residual waveform sensing node; a porous jet pipeline is laid below the working liquid level inside the deaerator; the steam flowing in the reheat cold section pipeline flows sequentially through the feedforward sensing matrix, the acoustic silencing flash evaporator, the residual waveform sensing node, and the pneumatic damping valve array, and is discharged into the porous jet pipeline for connection and distribution; The control center establishes communication connections with the feedforward sensing matrix, the acoustic silencing flash evaporation device, the residual waveform sensing node, and the pneumatic damping valve array. The control center includes: The state perception module acquires the slope parameter of the opening change of the desuperheating water regulating valve, the excitation waveform inside the reheat cold section pipeline, and the steam-water two-phase flow density value collected by the feedforward perception matrix. The evolution prediction module retrieves the slope parameters of the opening change of the desuperheating water regulating valve, the excitation waveform, and the two-phase flow density values ​​of steam and water, inputting them into the preset dynamic evolution model. It outputs the spatial coordinates of the secondary flash expansion caused by unvaporized water droplets and the frequency band of the alternating pressure wave. The pressure stabilization intervention module retrieves spatial location coordinates and alternating pressure wave frequency bands to generate volume adjustment commands and thermal excitation commands, which are then sent to the acoustic silencing flash evaporation device. It receives residual pulsating waveforms collected by residual waveform sensing nodes, calculates anti-phase compensation waveforms based on residual pulsating waveforms, and sends them to the pneumatic damping valve array to output a stable steam flow to the deaerator. The stable steam flow is then distributed and injected into the subcooled water body through a porous jet pipe network.

[0005] Furthermore, the deaerator low-temperature reheat steam source pressure stabilization and control system of the present invention includes an ultrasonic Doppler probe and a thin-film dynamic pressure sensing component in its feedforward sensing matrix. An ultrasonic Doppler probe is installed close to the outer wall of the reheat cold section pipe to collect the gas-water two-phase flow density value and flow velocity parameters inside the reheat cold section pipe; a thin-film dynamic pressure sensing component acquires the excitation waveform inside the reheat cold section pipe.

[0006] Furthermore, in the deaerator low-temperature reheat steam source pressure stabilization and control system of the present invention, the acoustic silencing flash evaporation device is internally arranged with a Helmholtz resonant cavity array and a microwave phase change excitation field; the Helmholtz resonant cavity array includes multiple independent parallel acoustic resonant main cavities, and a sliding piston assembly driven by a stepper motor is provided at the bottom of the acoustic resonant main cavity. The sliding piston assembly receives a volume adjustment command and generates displacement, which changes the physical volume of the acoustic resonant main cavity; the microwave phase change excitation field is composed of multiple microwave magnetron arrays, which receive thermal energy excitation commands and directionally emit microwave radiation of a specific frequency band into the reheat cold section pipe.

[0007] Furthermore, in the deaerator low-temperature reheat steam source pressure stabilization and control system of the present invention, the pneumatic damping valve array is composed of a central main pressure regulating valve and a miniature bypass valve array arranged in parallel around the central main pressure regulating valve; the individual miniature bypass valve in the miniature bypass valve array uses a piezoelectric ceramic micro-displacement actuator as a driving element, and the piezoelectric ceramic micro-displacement actuator receives an inverse compensation waveform to perform displacement adjustment.

[0008] Furthermore, in the deaerator low-temperature reheat steam source pressure stabilization and control system of the present invention, the porous jet pipe network is composed of multiple distribution branch pipes with fluid oscillation components on their surfaces; the fluid oscillation components are provided with wall-mounted oscillation cavities inside.

[0009] Furthermore, the deaerator low-temperature reheat steam source pressure stabilization and control system of the present invention includes an evolution prediction module comprising an analog-to-digital conversion unit and a trajectory calculation unit. The analog-to-digital conversion unit acquires the slope parameters of the opening change of the desuperheating water regulating valve in the simulated form, the excitation waveform, and the steam-water two-phase flow density values, inputs them into the analog-to-digital sampling channel, converts them into digital signals, processes the digital signals using a filtering algorithm, and performs sequence alignment based on a unified timestamp. Subsequently, it uses an extreme value normalization algorithm to eliminate the dimensional differences of data in different dimensions, generating a standard digital time series. The trajectory calculation unit retrieves the standard digital time series and inputs the energy conservation and mass conservation differential equations to calculate the heat absorption rate and trajectory of the unvaporized water droplets in the reheat cold section pipe. Based on the heat absorption rate and trajectory, it outputs the spatial position coordinates of the secondary flash expansion caused by the unvaporized water droplets, retrieves the alternating pressure data of the burst point corresponding to the spatial position coordinates, inputs it into a fast Fourier transform algorithm for processing, and extracts the alternating pressure wave frequency band.

[0010] Furthermore, the deaerator low-temperature reheat steam source pressure stabilization and control system of the present invention includes a pressure stabilization intervention module comprising a volume matching unit and a latent heat assignment unit; the volume matching unit acquires the extracted alternating pressure wave frequency band input acoustic resonance equation, solves for the target volume value required to absorb the alternating pressure wave frequency band, and generates a volume adjustment command based on the target volume value and sends it to the stepper motor; the latent heat assignment unit acquires the steam-water two-phase flow density value in the standard digital time series, calculates the latent heat gap value required for the phase change of unvaporized water droplets based on the steam-water two-phase flow density value, and generates a thermal energy excitation command based on the latent heat gap value and sends it to the microwave magnetron array.

[0011] Furthermore, the deaerator low-temperature reheat steam source pressure stabilization and control system of the present invention further includes a pressure stabilization intervention module including an anti-phase reconstruction unit and an interference execution unit; the anti-phase reconstruction unit acquires the residual pulsating waveform collected by the residual waveform sensing node, performs calculations on the residual pulsating waveform input phase inversion matrix in the time domain dimension, and outputs an anti-phase compensation waveform digital matrix with equal amplitude and a phase difference of 180 degrees; the interference execution unit inputs the anti-phase compensation waveform digital matrix into the digital-to-analog converter to generate a continuous analog voltage waveform, and outputs the continuous analog voltage waveform as the anti-phase compensation waveform to the piezoelectric ceramic micro-displacement execution component to drive the micro bypass valve array to release an anti-phase flow wave into the deaerator heating steam inlet main circuit.

[0012] Furthermore, in the deaerator low-temperature reheat steam source pressure stabilization and control system of the present invention, the sliding piston assembly receives a volume adjustment command to change the displacement of the physical volume of the acoustic resonance main cavity to offset the peak value of the alternating pressure wave inside the fluid, and the microwave magnetron array receives a thermal excitation command to emit microwave radiation to irradiate unvaporized water droplets and induce an instantaneous phase change; the sliding piston assembly and the microwave magnetron array synchronously receive commands to execute physical volume changes and radiation irradiation control, preventing unvaporized water droplets from entering the downstream pipeline and causing secondary flash expansion.

[0013] Furthermore, in the deaerator low-temperature reheat steam source stabilization and control system of the present invention, the porous jet pipe network is internally connected to a pneumatic damping valve array to receive a stable steam flow. The stable steam flow is input into the distribution branch pipe and enters the wall-attached oscillation cavity to undergo self-excited oscillation and alternating deflection, outputting a pulsating jet to impact the subcooled water. The pulsating jet strips away the condensation boundary layer, shears the steam bubbles into nanoscale vapor particles, fills the local vacuum negative pressure zone, and prevents the subcooled water from flowing back.

[0014] Beneficial effects of this invention: This invention provides a deaerator low-temperature reheat steam source pressure stabilization and control system. It uses a feedforward sensing matrix to collect real-time steam-water two-phase flow density values ​​and excitation waveforms, and inputs the collected data into an evolution prediction module. This module calculates the spatial coordinates of the secondary flash expansion caused by unvaporized water droplets and the alternating pressure wave frequency band, thus changing the traditional passive and lagging mechanical buffer logic. The pressure stabilization intervention module generates a volume adjustment command according to the alternating pressure wave frequency band and sends it to the acoustic silencing flash device. This drives the sliding piston assembly to change the physical volume of the acoustic resonant main cavity, precisely canceling the peak value of the alternating pressure wave inside the fluid using the acoustic phase cancellation principle. Simultaneously, the pressure stabilization intervention module generates a thermal energy excitation command and sends it to the microwave magnetron array. This controls the microwave magnetron array to directionally emit microwave radiation of a specific frequency band, forcing the unvaporized water droplets to absorb radiation energy and triggering an instantaneous phase change. This eliminates the conditions for secondary flash expansion caused by unvaporized water droplets entering the downstream pipeline from the thermodynamic source. The pressure stabilization intervention module calculates the anti-phase compensation waveform based on the residual pulsating waveform collected by the residual waveform sensor node. This waveform drives the pneumatic damping valve array to release an anti-phase flow wave into the main steam inlet of the deaerator. Relying on the fluid dynamics and physical interference cancellation effect, it outputs a stable steam flow with convergent pressure fluctuations, effectively suppressing the oscillation and runaway problem caused by pulsating impacts on the deaerator's steam inlet pressure regulating valve. The stable steam flow is discharged into the porous jet network, where it undergoes self-excited oscillation and alternating deflection within the wall-mounted oscillation chamber, generating a pulsating jet. This kinetic jet directly cuts through the subcooled water inside the deaerator. The pulsating jet continuously strips away and disrupts the condensation boundary layer generated at the steam contact surface, shearing and dissolving large-scale bubbles into nanoscale vapor particles. The dispersed microbubble clusters instantly fill the vacuum negative pressure zone generated by localized instantaneous condensation, preventing the surrounding subcooled water from flowing back to the negative pressure center at a high speed, thus destroying the physical basis for destructive transient water hammer phenomena inside the deaerator. Attached Figure Description

[0015] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0016] Figure 1 This is a system architecture diagram of a deaerator low-temperature reheat steam source pressure stabilization and control system according to the present invention. Detailed Implementation

[0017] To make the technical solution of the present invention clearer, the present invention will be clearly and completely described below with reference to specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. The various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. To better understand the purpose of the present invention, the present invention will be described in further detail below.

[0018] Please see Figure 1 The present invention provides a deaerator low-temperature reheat steam source pressure stabilization and control system, including physical equipment and control center. The physical equipment includes a feedforward sensing matrix, an acoustic silencing flash evaporation device, a residual waveform sensing node, a pneumatic damping valve array and a porous jet pipe network. A feedforward sensing matrix is ​​arranged along the pipeline from the desuperheating water inlet to the reheat cold section; an acoustic silencing flash evaporator is connected in series between the reheat cold section pipeline and the main steam inlet of the deaerator; a residual waveform sensing node is set in the reheat cold section pipeline downstream of the acoustic silencing flash evaporator; a pneumatic damping valve array is installed on the main steam inlet of the deaerator downstream of the residual waveform sensing node; a porous jet pipeline is laid below the working liquid level inside the deaerator; the steam flowing in the reheat cold section pipeline flows sequentially through the feedforward sensing matrix, the acoustic silencing flash evaporator, the residual waveform sensing node, and the pneumatic damping valve array, and is discharged into the porous jet pipeline for connection and distribution; The control center establishes communication connections with the feedforward sensing matrix, the acoustic silencing flash evaporation device, the residual waveform sensing node, and the pneumatic damping valve array. The control center includes: The state perception module acquires the slope parameter of the opening change of the desuperheating water regulating valve, the excitation waveform inside the reheat cold section pipeline, and the steam-water two-phase flow density value collected by the feedforward perception matrix. The evolution prediction module retrieves the slope parameters of the opening change of the desuperheating water regulating valve, the excitation waveform, and the two-phase flow density values ​​of steam and water, inputting them into the preset dynamic evolution model. It outputs the spatial coordinates of the secondary flash expansion caused by unvaporized water droplets and the frequency band of the alternating pressure wave. The pressure stabilization intervention module retrieves spatial location coordinates and alternating pressure wave frequency bands to generate volume adjustment commands and thermal excitation commands, which are then sent to the acoustic silencing flash evaporation device. It receives residual pulsating waveforms collected by residual waveform sensing nodes, calculates anti-phase compensation waveforms based on residual pulsating waveforms, and sends them to the pneumatic damping valve array to output a stable steam flow to the deaerator. The stable steam flow is then distributed and injected into the subcooled water body through a porous jet pipe network.

[0019] The deaerator low-temperature reheat steam source pressure stabilization and control system includes physical equipment arranged along the pipeline from the desuperheating water inlet to the reheat cold section, as well as a control center responsible for logic operations. Steam flowing within the pipeline carries incompletely vaporized water droplets, which sequentially pass through a feedforward sensing matrix, an acoustic silencing flash evaporation device, residual waveform sensing nodes, and a pneumatic damping valve array before being discharged into a porous jet pipe network for distribution. An ultrasonic Doppler probe inside the feedforward sensing matrix is ​​mounted close to the outer wall of the reheat cold section pipeline, emitting high-frequency ultrasonic waves into the pipeline using a non-contact acoustic detection mode. This probe collects the steam-water two-phase flow density and velocity parameters within the reheat cold section pipeline; the steam-water two-phase flow density represents the mass fraction of liquid water droplets per unit volume. A thin-film dynamic pressure sensing component, arranged at the same cross-section, penetrates deep into the fluid, recording the alternating dynamic pressure change waveform within the fluid as an excitation waveform. The state perception module inside the control center acquires the slope parameter of the opening change of the desuperheating water regulating valve, the excitation waveform inside the reheat cold section pipeline, and the steam-water two-phase flow density value collected by the feedforward perception matrix and stores them in the storage register channel for later use.

[0020] The analog-to-digital conversion unit within the evolution prediction module acquires the slope parameters of the opening change of the desuperheating water regulating valve, the excitation waveform, and the steam-water two-phase flow density values ​​from the simulated morphology, inputting them into the analog-to-digital sampling channel and converting them into discrete digital signals. The analog-to-digital conversion unit uses a filtering algorithm to process the digital signals, filtering out periodic interference electromagnetic noise generated by electrical equipment in the industrial environment, and generating a standard digital time series arranged by timestamps. The trajectory calculation unit retrieves the standard digital time series input into a preset dynamic evolution model, including differential equations for energy conservation and mass conservation, to calculate the heat absorption rate and downstream trajectory of unvaporized water droplets during mixing with high-temperature steam in the reheat cold section pipe. Based on the heat absorption rate and trajectory, the trajectory calculation unit extrapolates the spatial nodes where the unvaporized water droplets accumulate heat to reach saturation, outputting the spatial coordinates of the secondary flash expansion triggered by the unvaporized water droplets. The trajectory calculation unit retrieves the alternating pressure data of the burst point corresponding to the spatial coordinates and inputs it into a fast Fourier transform algorithm for processing, converting the time-domain dynamic pressure signal into a frequency-domain characteristic signal and extracting the frequency band of the alternating pressure wave that generates extremely strong resonant destructive force.

[0021] The voltage stabilization intervention module initiates a feedforward intervention process for the extracted alternating pressure wave frequency band. The volume matching unit within the voltage stabilization intervention module obtains the acoustic resonance equation for the extracted alternating pressure wave frequency band, calculates the target volume value required to generate complete interference absorption of the alternating pressure wave frequency band, and generates a volume adjustment command based on the target volume value, which is sent to the stepper motor inside the acoustic silencing flash evaporation device. The stepper motor drives the sliding piston assembly to produce a corresponding displacement. This displacement changes the physical volume of the main acoustic resonance cavity, which includes multiple independent parallel structures, and uses the acoustic phase cancellation principle to cancel the peak value of the alternating pressure wave inside the fluid. The latent heat assignment unit obtains the vapor-water two-phase flow density value from the standard digital time series, measures the total heat required for liquid water to transform into gas based on the vapor-water two-phase flow density value, calculates the latent heat gap value required for the phase change of unvaporized water droplets, and generates a microwave transmission power duty cycle command based on the latent heat gap value, which serves as a thermal excitation command and is sent to the microwave magnetron array. The microwave magnetron array, following thermal excitation commands, directionally emits specific frequency microwave radiation into the reheated cold section of the pipe. This microwave radiation irradiates unvaporized water droplets, converting the radiation energy into molecular thermal kinetic energy and triggering an instantaneous phase transition. The sliding piston assembly, synchronously receiving commands with the microwave magnetron array, executes physical volume changes and radiation irradiation control, forcing the liquid phase to transform into a vapor phase before reaching the corresponding spatial coordinate region, preventing unvaporized water droplets from entering the downstream pipeline and undergoing secondary flash expansion.

[0022] The steam flow, regulated by the acoustic silencing flash evaporator, continues downstream. A residual waveform sensing node is located in the reheat cold section pipeline downstream of the acoustic silencing flash evaporator, collecting residual pulsating waveforms generated by minute pressure fluctuations within the pipeline. The inverse reconstruction unit within the pressure stabilization intervention module acquires the residual pulsating waveform collected by the residual waveform sensing node. In the time domain, it performs calculations on the phase inversion matrix (including inversion logic) input to the residual pulsating waveform, outputting a digital matrix of inverse compensation waveforms with equal amplitude and a 180-degree phase difference. The interference execution unit inputs the digital matrix of inverse compensation waveforms into the digital-to-analog converter, generating a smoothly changing continuous analog voltage waveform. This continuous analog voltage waveform is then output as the inverse compensation waveform to the piezoelectric ceramic micro-displacement actuator of the pneumatic damping valve array. The piezoelectric ceramic micro-displacement actuator receives the inverse compensation waveform and performs high-frequency telescopic displacement adjustment, driving the valve core inside the miniature bypass valve array to reciprocate at high speed, releasing an inverse flow wave opposite to the residual pulsating waveform into the main steam inlet of the deaerator heating system. The opposing flow wave and the original pressure fluctuation in the pipeline collide and cancel each other out, resulting in a smooth steam flow.

[0023] The steady steam flow discharged from the pneumatic damping valve array is transported downstream to the deaerator. The porous jet network, internally connected to the pneumatic damping valve array, receives this steady steam flow. The porous jet network consists of multiple distribution branches with fluid oscillation components on their surfaces, laid below the working liquid level inside the deaerator. The steady steam flow enters the wall-mounted oscillation chamber within the fluid oscillation components through the distribution branches. The fluid adheres to the chamber wall, creating a velocity difference and resulting in alternating deflections and self-excited oscillations in a physical fluid dynamics dimension. The self-excited steam is ejected outwards as a reciprocating pulsating jet, which directly cuts through the subcooled water contained within the deaerator. This kinetic jet disrupts and strips away the condensation boundary layer formed at the interface between the high-temperature steam and the low-temperature water, generating strong physical shear forces that shear large-scale aggregated vapor bubbles into nanoscale vapor particles. Nanoscale vapor particles increase the contact area between vapor and water and slow down the rate of local condensation collapse. The diffused fine vapor particle group fills the vacuum negative pressure zone generated by local instantaneous condensation, preventing the subcooled water from causing a destructive backflow impact to the negative pressure center.

[0024] The analog-to-digital conversion (ADC) unit within the evolution prediction module acquires the slope parameters of the opening change of the cooling water regulating valve, the excitation waveform, and the steam-water two-phase flow density values ​​from the simulated morphology and inputs them into the analog-to-digital sampling channel, converting them into discrete digital signals. The ADC unit uses a filtering algorithm to process the digital signals. Since the three types of data belong to different physical dimensions and have different sampling frequencies, the ADC unit extracts the system timestamp carried by the discrete digital signals and performs linear interpolation alignment based on the highest sampling frequency to form a multidimensional feature matrix. To prevent gradient explosion during neural network training due to dimensional differences, the ADC unit uses an extreme value normalization mathematical model to process the multidimensional feature matrix to generate a dimensionless standard digital time series.

[0025] The mathematical formula for extreme value normalization is expressed as:

[0026] In the formula, This represents the normalized dimensionless numerical sequence value. This represents the current period's sampled value of the aligned discrete digital signal. and These represent the minimum and maximum extreme values ​​of this type of physical parameter under preset historical operating conditions, respectively.

[0027] The trajectory calculation unit retrieves standard digital time series inputs for energy and mass conservation differential equations to calculate the heat absorption rate and trajectory of unvaporized water droplets within the reheat cold section pipe. The energy and mass conservation differential equations defined within the trajectory calculation unit include the formula for calculating the heat absorption rate to assess phase change potential.

[0028] In the formula, This represents the rate at which unvaporized water droplets absorb heat within the reheat cold section of the pipe. The convective heat transfer coefficient represents the surface area between high-temperature steam and liquid water droplets. This represents the surface area of ​​the unvaporized water droplets as reconstructed from the digital signal. This represents the high-temperature steam temperature inside the reheat cold section pipe extracted from a standard digital time series. This represents the initial temperature value inside the unvaporized water droplet. The trajectory calculation unit outputs the spatial coordinates of the secondary flash expansion caused by the unvaporized water droplet based on the heat absorption rate and motion trajectory. It then retrieves the alternating pressure data at the corresponding burst point and inputs it into a Fast Fourier Transform (FFT) algorithm for processing, extracting the alternating pressure wave frequency band, including the dominant frequency energy. The discrete mathematical mapping formula of the FFT algorithm is expressed as:

[0029] In the formula, This represents the frequency domain characteristic signal of the converted output, including the alternating pressure wave frequency band. This represents the alternating pressure data of the time-domain burst point corresponding to the input spatial location coordinates. This represents the total number of discrete data points within a single sampling period. Represents the index value of the discrete frequency sequence. Represents the imaginary unit constant in complex number operations. The time series index value representing the time domain data point. Represents the constant value of pi. Represents the natural constant.

[0030] The voltage stabilization intervention module includes a volume matching unit for physical capacity expansion and a latent heat assignment unit for controlling heat injection. The volume matching unit acquires the extracted alternating pressure wave frequency band input acoustic resonance equation and solves for the target volume value required to absorb the alternating pressure wave frequency band. The acoustic resonance equation called internally by the volume matching unit is expressed as:

[0031] In the formula, This represents the target volume value required to absorb alternating pressure wave frequencies. The sound velocity propagation constant represents the high-pressure steam medium inside the reheat cold section pipeline. This represents the center frequency value extracted from the alternating pressure wave frequency band. Represents the constant value of pi. The value represents the cross-sectional area of ​​the opening of the main acoustic resonance cavity inside the acoustic silencing flash evaporation device. This represents the effective physical length of the opening of the main acoustic resonance cavity inside the acoustic silencing flash evaporation device. The volume matching unit generates a volume adjustment command based on the target volume value and sends it to the stepper motor to adjust the physical absorption cavity. The latent heat assignment unit obtains the gas-water two-phase flow density values ​​from the standard digital time series, calculates the latent heat gap required for the phase change of unvaporized water droplets based on these values, and quantifies the energy barrier for the liquid-to-gas conversion. The mathematical quantification formula used by the latent heat assignment unit is expressed as:

[0032] In the formula, This represents the latent heat gap required for the phase transition of unvaporized water droplets. This represents the absolute density parameter of liquid water droplets extracted from the density values ​​of the two-phase flow of water and gas. The fixed volume parameter representing the monitoring section at the front end of the reheat cold section pipeline. This represents the physical latent heat of vaporization constant required for liquid water to transform into water vapor under specific operating pressure conditions. The latent heat assignment unit generates a thermal energy excitation command based on the latent heat gap value and sends it to the microwave magnetron array for directional thermal energy intervention. The inverse reconstruction unit configured in the voltage stabilization intervention module acquires the residual pulsating waveform collected by the residual waveform sensing node, performs calculations on the residual pulsating waveform input phase inversion matrix in the time domain, and outputs an inverse compensation waveform digital matrix with equal amplitude and a phase difference of 180 degrees. The mathematical formula for the phase inversion matrix called by the inverse reconstruction unit is expressed as:

[0033] In the formula, This represents a digital matrix of inverted compensation waveforms with equal amplitude and a 180-degree phase difference from the output of the inverted reconstruction unit. This represents a two-dimensional digital inverted matrix whose diagonal elements are uniformly set to a negative one constant. The input column vector matrix represents the residual pulsating waveforms acquired by the residual waveform sensing nodes. The interference actuator inputs the inverse compensation waveform digital matrix into the digital-to-analog converter to generate a continuous analog voltage waveform. The continuous analog voltage waveform is then output as the inverse compensation waveform to the piezoelectric ceramic micro-displacement actuator, which drives the micro bypass valve array to release an inverse flow wave into the deaerator heating steam inlet for fluid cancellation.

[0034] To verify the effectiveness of the aforementioned underlying mathematical model and equipment linkage data processing path, a set of specific computational example data is given below. The feedforward sensing matrix collects flow field data and converts it into an unprocessed discrete digital signal value of 110, which is then sent to the analog-to-digital converter (ADC). The ADC retrieves the standard digital time series value of 100 output from the previous calculation cycle. The internally set state transition matrix constant and observation matrix constant are both 1, and the Kalman gain coefficient for the current cycle is set to 0.5. The ADC substitutes this value into the Kalman filter mathematical formula to calculate and output the standard digital time series value of 105 for the current calculation cycle. The trajectory calculation unit simultaneously acquires flow field parameters, extracting the convective heat transfer coefficient of 500 on the surface of the high-temperature steam and liquid water droplets, the surface area of ​​the unvaporized water droplets (0.002), the internal temperature of the high-temperature steam (350), and the initial internal temperature of the unvaporized water droplets (150). The trajectory calculation unit substitutes this value into the heat absorption rate calculation formula to obtain the heat absorption rate of the unvaporized water droplets as 200. The trajectory calculation unit retrieves node data and inputs it into the Fast Fourier Transform algorithm for processing, extracting the center frequency value of the alternating pressure wave band as 50. The volume matching unit reads the sound velocity propagation constant of 500 for the steam medium inside the reheat cold section pipe, extracts the cross-sectional area of ​​the acoustic resonance main cavity (0.01) and the effective physical length of the opening (0.1), and calculates the pi constant as 3.14. Substituting these values ​​into the acoustic resonance equation, the volume matching unit calculates the target volume value required to absorb the alternating pressure wave frequency band, which is approximately 0.25. The latent heat assignment unit resolves the absolute density parameter 5 of the liquid water droplets, retrieves the fixed volume parameter 2 of the monitoring section at the front end of the pipe, and the latent heat constant of vaporization (2000). Substituting these values ​​into the mathematical quantization formula, the latent heat gap value required for the phase change of the unvaporized water droplets is calculated to be 20000. The phase reversal reconstruction unit receives the input column vector matrix elements 10 and -5, formed by the transformation of the residual pulsating waveform, and sets a two-dimensional digital phase reversal matrix with diagonal elements uniformly set to a negative one constant. The phase reversal reconstruction unit performs a phase inversion operation to obtain the corresponding matrix elements of the phase compensation waveform digital matrix, which are then transformed into -10 and +5. The system, relying on rigorous closed-loop mathematical calculations, sends reliable adjustment commands to the execution terminal.

[0035] During the training of the preset dynamic evolution model, the control center sets a preset convergence threshold to determine whether the model has completed training. The control center extracts the average value of the initial mean squared error loss function over the first 100 iterations of model training. The control center multiplies the average value of the initial mean squared error loss function by an empirical constant of 0.001 to calculate the preset convergence threshold with a quantized value of 0.005. After each backpropagation weight update, the control center extracts the comprehensive loss function value for the current period. The control center compares the comprehensive loss function value with the preset convergence threshold of 0.005. If the comprehensive loss function value is less than 0.005 for 50 consecutive iterations, the control center determines that the preset dynamic evolution model has reached the global optimum. The control center then cuts off the backpropagation update loop and solidifies the weight matrix of the internal nodes of the neural network.

[0036] In specific practical applications, such as single-boiler heating operations where the turbine generator unit is shut down and heating is provided by a combination of high and low pressure bypasses for pressure reduction and capacity expansion, the main steam from the boiler undergoes a pressure reduction and throttling action with a span exceeding 10 MPa via the high-pressure bypass main valve. A large amount of desuperheating water is injected into the pipeline along with the high-speed steam flow into the downstream reheat cold section pipeline. A feedforward sensing matrix deployed along the pipeline from the desuperheating water inlet to the reheat cold section performs non-contact physical detection of the fluid state inside the pipe. An ultrasonic Doppler probe, closely attached to the outer wall of the reheat cold section pipeline, continuously emits a high-frequency ultrasonic beam with a center frequency of 2 MHz into the pipe. Utilizing the principles of sound wave energy attenuation and Doppler frequency shift, it collects the two-phase flow density values ​​of steam and water and scalar velocity parameters within the reheat cold section pipeline. A thin-film dynamic pressure sensing component located at the same physical cross-section records the high-frequency alternating dynamic pressure changes inside the fluid, generating an excitation waveform based on the piezoresistive effect. The state perception module acquires the slope parameter of the opening change of the desuperheating water regulating valve, the excitation waveform inside the reheat cold section pipe, and the steam-water two-phase flow density value collected by the feedforward perception matrix. The above multi-dimensional analog quantities are synchronously transmitted to the evolution prediction module to perform the underlying physical logic conversion.

[0037] The analog-to-digital conversion unit within the evolution prediction module acquires the slope parameters of the opening change of the desuperheating water regulating valve, the excitation waveform, and the two-phase flow density values ​​of the steam and water in the simulated morphology. These are then input into the built-in 16-bit resolution analog-to-digital sampling channel and converted into discrete digital signals. The analog-to-digital conversion unit uses an internally stored Kalman filter algorithm to process the digital signals, filtering out background white noise interference from high-frequency mechanical vibrations in industrial pipelines, and generating a standard digital time series with a unified time base. The trajectory calculation unit retrieves the standard digital time series and inputs it into the preset dynamic evolution model. Combining energy conservation and mass conservation differential equations, it calculates the heat absorption rate and three-dimensional trajectory of unvaporized water droplets mixing with high-temperature steam in the reheat cold section of the pipeline. The preset dynamic evolution model is constructed using an artificial neural network architecture with embedded physical mechanisms to establish a high-dimensional nonlinear mapping relationship between the input flow field parameters and the output flash spatial coordinates. The preset dynamic evolution model internally consists of an input layer, a hidden layer, a physical constraint layer, and an output layer. The input layer receives a standard digital time series, which includes parameters such as the slope of the opening change of the desuperheating water regulating valve, the excitation waveform, and the two-phase flow density values ​​of steam and water, arranged sequentially along the time dimension. The hidden layer comprises multiple layers of bidirectional long short-term memory (LSTM) network units, which extract a multidimensional spatiotemporal evolution feature matrix from the standard digital time series. The physical constraint layer transforms the energy conservation differential equation and the mass conservation differential equation into physical residual loss terms embedded in the node operation logic. These physical residual loss terms constrain the multidimensional spatiotemporal evolution feature matrix output by the hidden layer, outputting an intermediate state prediction vector that conforms to the laws of fluid mechanics. The output layer performs a fully connected mapping calculation on the intermediate state prediction vector, outputting the predicted spatial coordinates of the secondary flash expansion caused by unvaporized water droplets.

[0038] Before being put into practical application, the pre-set dynamic evolution model undergoes a complete computational training process. The control center acquires desuperheating water injection condition data from the historical operation database of the thermal power plant to construct a training sample set. The training sample set includes the sample input feature matrix and the real flashing location label data corresponding to the sample input feature matrix. The control center needs to acquire the real flashing location label data from the historical operation database of the thermal power plant to construct the pre-set dynamic evolution model. The control center retrieves the axial temperature gradient distribution matrix collected by the high-density distributed temperature sensing fiber array installed on the outer wall of the historical operation pipeline. According to the axial temperature gradient distribution matrix, the control center locates the physical coordinate point where the fluid temperature undergoes a step-down abrupt change. The control center marks the physical coordinate point where the fluid temperature undergoes a step-down abrupt change as the secondary flashing burst center where the liquid water droplet undergoes a violent phase change and absorbs heat. The control center converts the coordinate values ​​corresponding to the secondary flashing burst center into the real flashing location label data required for supervised learning. The control center pairs the sample input feature matrix with the real flashing location label data and inputs them into the hidden layer. The bidirectional long short-term memory network unit inside the hidden layer includes a forget gate, an input gate, and an output gate. The bidirectional long short-term memory network unit extracts spatiotemporal evolution features through forward and backward computation sequences, and outputs a multidimensional spatiotemporal evolution feature matrix to the physical constraint layer for loss calculation.

[0039] The control center inputs the sample input feature matrix into an uninitialized preset dynamic evolution model and performs forward propagation to obtain a preliminary output. The control center calculates the mean squared error loss function between the preliminary output and the actual flash location label data. This mean squared error loss function is then added to the physical residual loss term output from the physical constraint layer to obtain the comprehensive loss function. The control center uses an adaptive moment estimation optimization algorithm to calculate the partial derivative gradients of the network's internal weight parameters based on the comprehensive loss function value, and performs backpropagation to update the weight parameters within the hidden and output layers. The control center repeatedly executes the forward propagation and backpropagation update processes until the comprehensive loss function value converges below a preset convergence threshold. At this point, parameter updates are stopped, the network weights are fixed, and the training process of the preset dynamic evolution model is complete.

[0040] The control center conducted comparative tests in a 350 MW supercritical unit bypass heating retrofit project at a thermal power plant. The control center continuously operated a conventional desuperheating and pressure-reducing device for 24 hours. Simultaneously, the control center recorded steam pressure fluctuations and valve oscillation counts upstream of the deaerator inlet pressure regulating valve. During operation of the conventional desuperheating and pressure-reducing device, the control center recorded a steam pressure fluctuation amplitude of 0.5 MPa, 150 high-frequency mechanical oscillations in the inlet pressure regulating valve, and 12 transient water hammer impacts inside the deaerator. The control center then continuously operated the deaerator low-temperature reheat steam source pressure regulating system under the same operating conditions for 24 hours. During operation of the deaerator low-temperature reheat steam source pressure regulating system, the control center recorded a reduction in steam pressure fluctuation amplitude to 0.02 MPa, a reduction in the number of high-frequency mechanical oscillations in the inlet pressure regulating valve to 0, and a reduction in the number of transient water hammer impacts inside the deaerator to 0.

[0041] The trajectory calculation unit deduces the critical physical node when the liquid water droplets accumulate heat to reach the saturation temperature based on the heat absorption rate and motion trajectory, and outputs the spatial coordinates of the secondary flash expansion caused by the unvaporized water droplets; the evolution prediction module retrieves the alternating pressure data of the burst point corresponding to the spatial coordinates and inputs it into the fast Fourier transform algorithm for processing, deconstructing the time-domain dynamic pressure signal into a frequency-domain feature signal, and extracting the alternating pressure wave frequency band with the highest amplitude and the strongest destructive force.

[0042] The pressure stabilization intervention module retrieves the spatial coordinates and alternating pressure wave frequency band to initiate the pipeline feedforward intervention program. The volume matching unit obtains the extracted alternating pressure wave frequency band input acoustic resonance equation, calculates the target volume value required to generate complete physical interference absorption of the alternating pressure wave frequency band, and generates a volume adjustment command including the specific number of pulses based on the target volume value, which is sent to the stepper motor in the acoustic silencing flash evaporation device. The stepper motor drives the sliding piston assembly at the bottom of the acoustic resonance main cavity to produce millimeter-level linear displacement. The displacement process changes the internal physical volume of the independently connected parallel acoustic resonance main cavities, so that the inherent resonant frequency of the Helmholtz resonant cavity array matches the alternating pressure wave frequency band, and cancels the peak value of the alternating pressure wave inside the fluid by relying on the acoustic phase cancellation principle. The latent heat assignment unit acquires the vapor-water two-phase flow density value from the standard digital time series. Based on this value, it measures the total heat absorbed by the liquid water to transform into a gaseous state per unit volume, and calculates the latent heat gap value required for the complete phase change of the unvaporized water droplets. The latent heat assignment unit then generates a specific PWM pulse width modulated microwave transmission power duty cycle command based on the latent heat gap value and sends it to the microwave magnetron array. Multiple microwave magnetron arrays within the microwave phase change excitation field receive the thermal excitation command and directionally emit 2.45GHz microwave radiation into the reheat cold section pipe. This microwave radiation penetrates the vapor phase and reaches the interior of the unvaporized water droplets, exciting the water molecules through high-frequency frictional heat generation, forcing the liquid water droplets to complete an instantaneous phase change before reaching their spatial coordinates. The sliding piston assembly, synchronously receiving commands with the microwave magnetron array, executes physical volume changes and radiation irradiation control, preventing the unvaporized water droplets from entering the downstream low-pressure pipeline and triggering secondary flash expansion.

[0043] The steam flow, initially stabilized and regulated by the acoustic silencing flash evaporator, continues downstream. A residual waveform sensor node, located in the reheat cold section pipe downstream of the acoustic silencing flash evaporator, collects the residual low-frequency weak pressure pulsation signal in the flow field, generating a residual pulsating waveform. The inversion reconstruction unit acquires the residual pulsating waveform collected by the residual waveform sensor node and performs a digital phase inversion operation on the residual pulsating waveform in the time domain using a phase inversion matrix with built-in inversion logic, outputting a digital matrix of inverted compensation waveforms with completely equal amplitudes and a 180-degree phase difference. The interference actuation unit inputs the digital matrix of inverted compensation waveforms into a high-speed digital-to-analog converter to generate a smoothly varying continuous analog voltage waveform. This continuous analog voltage waveform is then directly output as the inverted compensation waveform to the piezoelectric ceramic micro-displacement actuator within the pneumatic damping valve array. The piezoelectric ceramic micro-displacement actuator inside the array of miniature bypass valves arranged in parallel around the central main pressure regulating valve receives the anti-phase compensation waveform and performs millisecond-level displacement adjustment, driving the miniature bypass valve core to perform high-frequency reciprocating oscillation, releasing an anti-phase flow wave that is completely opposite in phase to the original residual pulsation into the main steam inlet of the deaerator; the two types of fluid pressure waves physically interfere and cancel each other out in the pipeline, the central main pressure regulating valve relies on the mechanical sleeve to bear the basic steady-state pressure drop, and the pneumatic damping valve array outputs a stable steam flow with constant absolute pressure to the deaerator.

[0044] A steady steam flow is discharged along the main heating inlet into a porous jet pipe network laid below the working liquid surface inside the deaerator for distribution. The steady steam flow enters the wall-mounted oscillation chamber inside the fluid oscillation component through evenly distributed distribution branch pipes. Due to the Coanda effect, the steady steam flow causes changes in the hydrostatic pressure difference, resulting in alternating deflections and self-excited oscillations between the two walls of the wall-mounted oscillation chamber. The steam in this self-excited oscillation state is ejected outwards as a fan-shaped pulsating jet, which directly cuts through the subcooled water contained inside the deaerator. The pulsating jet generates physical shear force, continuously stripping and destroying the condensation boundary layer formed at the interface between the high-temperature steam and the subcooled water, shearing and dissolving large-scale aggregated vapor bubbles into nanoscale vapor particles. The dispersed nanoscale vapor particles increase the physical contact area between the steam and water, making the phase change exothermic process more gradual. The nanoscale vapor particles fill the vacuum negative pressure zone created by instantaneous condensation in the local space, preventing the surrounding subcooled water from flowing back and impacting the negative pressure center.

Claims

1. A deaerator low-temperature reheat steam source pressure stabilization and control system, characterized in that, It includes physical equipment and a control center. The physical equipment includes a feedforward sensing matrix, an acoustic silencing flash evaporation device, a residual waveform sensing node, a pneumatic damping valve array, and a porous jet network. A feedforward sensing matrix is ​​arranged along the pipeline from the desuperheating water inlet to the reheat cold section; an acoustic silencing flash evaporator is connected in series between the reheat cold section pipeline and the main steam inlet of the deaerator; a residual waveform sensing node is set in the reheat cold section pipeline downstream of the acoustic silencing flash evaporator; a pneumatic damping valve array is installed on the main steam inlet of the deaerator downstream of the residual waveform sensing node; a porous jet pipeline is laid below the working liquid level inside the deaerator; the steam flowing in the reheat cold section pipeline flows sequentially through the feedforward sensing matrix, the acoustic silencing flash evaporator, the residual waveform sensing node, and the pneumatic damping valve array, and is discharged into the porous jet pipeline for connection and distribution; The control center establishes communication connections with the feedforward sensing matrix, the acoustic silencing flash evaporation device, the residual waveform sensing node, and the pneumatic damping valve array. The control center includes: The state perception module acquires the slope parameter of the opening change of the desuperheating water regulating valve, the excitation waveform inside the reheat cold section pipeline, and the steam-water two-phase flow density value collected by the feedforward perception matrix. The evolution prediction module retrieves the slope parameters of the opening change of the desuperheating water regulating valve, the excitation waveform, and the two-phase flow density values ​​of steam and water, inputting them into the preset dynamic evolution model. It outputs the spatial coordinates of the secondary flash expansion caused by unvaporized water droplets and the frequency band of the alternating pressure wave. The pressure stabilization intervention module retrieves spatial location coordinates and alternating pressure wave frequency bands to generate volume adjustment commands and thermal excitation commands, which are then sent to the acoustic silencing flash evaporation device. It receives residual pulsating waveforms collected by residual waveform sensing nodes, calculates anti-phase compensation waveforms based on residual pulsating waveforms, and sends them to the pneumatic damping valve array to output a stable steam flow to the deaerator. The stable steam flow is then distributed and injected into the subcooled water body through a porous jet pipe network.

2. The deaerator low-temperature reheat steam source pressure stabilization and control system according to claim 1, characterized in that, The feedforward sensing matrix includes an ultrasonic Doppler probe and a thin-film dynamic pressure sensing component; An ultrasonic Doppler probe is installed close to the outer wall of the reheat cold section pipe to collect the gas-water two-phase flow density value and flow velocity parameters inside the reheat cold section pipe; a thin-film dynamic pressure sensing component acquires the excitation waveform inside the reheat cold section pipe.

3. The deaerator low-temperature reheat steam source pressure stabilization and control system according to claim 2, characterized in that, The acoustic silencing flash evaporation device contains a Helmholtz resonant cavity array and a microwave phase transition excitation field. The Helmholtz resonant cavity array includes multiple independent parallel acoustic resonant main cavities. At the bottom of each acoustic resonant main cavity is a sliding piston assembly driven by a stepper motor. The sliding piston assembly receives a volume adjustment command and generates displacement, which changes the physical volume of the acoustic resonant main cavity. The microwave phase transition excitation field is composed of multiple microwave magnetron arrays. The microwave magnetron arrays receive thermal excitation commands and directionally emit specific frequency microwave radiation into the reheat cold section pipe.

4. The deaerator low-temperature reheat steam source pressure stabilization and control system according to claim 3, characterized in that, The pneumatic damping valve array consists of a central main pressure regulating valve and a miniature bypass valve array arranged in parallel around the central main pressure regulating valve. Each miniature bypass valve in the miniature bypass valve array uses a piezoelectric ceramic micro-displacement actuator as the driving element. The piezoelectric ceramic micro-displacement actuator receives an inverse compensation waveform to perform displacement adjustment.

5. The deaerator low-temperature reheat steam source pressure stabilization and control system according to claim 4, characterized in that, The porous jet network consists of multiple distribution branches with fluid oscillation components on their surfaces; the fluid oscillation components have attached wall oscillation cavities inside.

6. The deaerator low-temperature reheat steam source pressure stabilization and control system according to claim 5, characterized in that, The evolution prediction module includes an analog-to-digital conversion unit and a trajectory calculation unit. The analog-to-digital conversion unit acquires the slope parameters of the opening change of the desuperheating water regulating valve, the excitation waveform, and the steam-water two-phase flow density values ​​of the simulated morphology, inputs them into the analog-to-digital sampling channel, converts them into digital signals, processes the digital signals using a filtering algorithm, and performs sequence alignment based on a unified timestamp. Subsequently, it uses an extreme value normalization algorithm to eliminate the dimensional differences of data in different dimensions and generates a standard digital time series. The trajectory calculation unit retrieves the standard digital time series and inputs the energy conservation and mass conservation differential equations to calculate the heat absorption rate and trajectory of the unvaporized water droplets in the reheat cold section pipe. Based on the heat absorption rate and trajectory, it outputs the spatial coordinates of the secondary flash expansion caused by the unvaporized water droplets. It retrieves the alternating pressure data of the burst point corresponding to the spatial coordinates and inputs it into a fast Fourier transform algorithm for processing to extract the alternating pressure wave frequency band.

7. The deaerator low-temperature reheat steam source pressure stabilization and control system according to claim 6, characterized in that, The voltage stabilization intervention module includes a volume matching unit and a latent heat assignment unit. The volume matching unit obtains the acoustic resonance equation of the extracted alternating pressure wave frequency band, solves for the target volume value required to absorb the alternating pressure wave frequency band, and generates a volume adjustment command based on the target volume value, which is then sent to the stepper motor. The latent heat assignment unit obtains the gas-water two-phase flow density value in the standard digital time series, calculates the latent heat gap value required for the phase change of unvaporized water droplets based on the gas-water two-phase flow density value, and generates a thermal energy excitation command based on the latent heat gap value, which is then sent to the microwave magnetron array.

8. The deaerator low-temperature reheat steam source pressure stabilization and control system according to claim 7, characterized in that, The voltage regulation intervention module also includes an inverted reconstruction unit and an interference execution unit; the inverted reconstruction unit acquires the residual pulsating waveform collected by the residual waveform sensing node, performs calculations on the residual pulsating waveform input phase reversal matrix in the time domain dimension, and outputs an inverted compensation waveform digital matrix with equal amplitude and a phase difference of 180 degrees. The interference actuator inputs the digital matrix of the inverse compensation waveform into the digital-to-analog converter to generate a continuous analog voltage waveform. The continuous analog voltage waveform is then output as the inverse compensation waveform to the piezoelectric ceramic micro-displacement actuator, which drives the micro bypass valve array to release an inverse flow wave into the main heating steam path of the deaerator.

9. The deaerator low-temperature reheat steam source pressure stabilization and control system according to claim 8, characterized in that, The sliding piston assembly receives a volume adjustment command and generates a displacement change to alter the physical volume of the acoustic resonance main cavity, thus offsetting the peak value of the alternating pressure wave inside the fluid. The microwave magnetron array receives a thermal excitation command and emits microwave radiation to irradiate the unvaporized water droplets, triggering an instantaneous phase change. The sliding piston assembly and the microwave magnetron array synchronously receive commands to execute physical volume changes and radiation irradiation control, preventing the unvaporized water droplets from entering the downstream pipeline and causing secondary flash expansion.

10. The deaerator low-temperature reheat steam source pressure stabilization and control system according to claim 9, characterized in that, The porous jet network is internally connected to a pneumatic damping valve array to receive a steady steam flow. The steady steam flow enters the distribution branch pipe and enters the wall-mounted oscillation chamber, where it undergoes self-excited oscillation and alternating deflection, outputting a pulsating jet that impacts the subcooled water. The pulsating jet strips away the condensation boundary layer, shears the bubbles into nanoscale vapor particles, fills the local vacuum negative pressure zone, and prevents the subcooled water from flowing back.

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