Furnace combustion scene digital holographic intelligent control organization combustion system

Abstract

The invention discloses a furnace combustion scene digital holographic intelligent control organization combustion system, which comprises a measurement module configured in a hearth and at a combustor air inlet / powder inlet pipeline, a secondary air duct and an over-fire air duct, and used for performing high-precision and real-time measurement on key physical parameters in a hearth combustion scene, comprising a combustor thermal kinetic energy measuring sensor, a primary air powder flow state and property parameter measuring sensor and a secondary air and over fire air measuring sensor. And the data processing and modeling module is electrically connected to the measurement module and is used for receiving and processing mass real-time data from the measurement module. The invention relates to the technical field of intelligent combustion control and process optimization. According to the furnace combustion scene digital holographic intelligent control organization combustion system, by constructing the furnace combustion scene digital holographic intelligent control organization combustion system, the inherent limitation of an existing hearth combustion control system in the aspects of microcosmic combustion state perception, refined regulation and control and dynamic response is successfully overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent combustion control and process optimization, in particular to a furnace combustion scene digital holographic intelligent control organization combustion system. BACKGROUND

[0002] Furnace combustion technology, especially in the fields of thermal power generation, industrial boilers and central heating, is the core link for providing basic energy and heat. Its operating efficiency, reliability and environmental friendliness are directly related to the sustainable development of the national economy and the protection of the ecological environment. For a long time, in order to ensure the stability and efficiency of the combustion process, the technical personnel in this field have been committed to optimizing the combustion control system.

[0003] Referring to patent publication No. "CN118031245B", a coal-fired boiler intelligent optimization combustion control system is disclosed, which comprises: a data acquisition module: obtaining target data of a target area, the target data including the heat load value of the target area; a data determination module: forming analysis data according to the target data, and determining whether the target data is abnormal; a data processing module: adjusting the combustion of the target area according to the analysis data, and forming initial adjustment data; a fault database management module: recording the adjustment data to form historical adjustment data; a fault data alarm module: alarming the analysis data that exceeds the adjustment range to prompt the staff to adjust.

[0004] As shown in the above-mentioned technology, the feedback signals such as oxygen content of flue gas at the outlet of the furnace relied on by the traditional system reflect the overall average state of the combustion process in the furnace, which cannot effectively identify the uneven combustion problem in the local area inside the furnace, which leads to the widespread existence of "partial burning" phenomenon, that is, the flame in some areas of the furnace is too strong or too weak, the local temperature is too high or too low, and the local high temperature may cause the water-cooled wall pipe wall to overheat, coking and corrosion, which seriously affects the safe and economic operation life of the boiler; and the local insufficient combustion will lead to an increase in carbon content of fly ash, a decrease in boiler thermal efficiency, and the generation of too much pollutants (such as carbon monoxide and nitrogen oxides), which is difficult to meet the increasingly stringent environmental protection regulations. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a furnace combustion scene digital holographic intelligent control organization combustion system, which solves the inherent limitations of the existing furnace combustion control system in micro combustion state perception, fine regulation and dynamic response, thereby solving the problem of uneven local combustion commonly existing in the operation process of the multi-burner system.

[0006] To achieve the above purpose, the present application is realized by the following technical scheme: a furnace combustion scene digital holographic intelligent control organization combustion system comprises: A measurement module is arranged at the furnace, the air and powder inlet pipeline of the burner, the secondary air duct and the overfire air duct, and is used for high-precision and real-time measurement of key physical parameters in the combustion scene of the furnace, including a burner thermal kinetic energy measurement sensor, a primary air and powder flow state and property parameter measurement sensor, and a secondary air and overfire air measurement sensor; A data processing and modeling module is electrically connected to the measurement module, and is used for receiving and processing massive real-time data from the measurement module, and constructing a digital holographic model of the internal combustion process of the furnace, including a central data processing cabinet and a hardware and software of a boiler combustion three-dimensional holographic intelligent control system; A control decision module is electrically connected to the data processing and modeling module, and is used for generating and issuing accurate control instructions based on the analysis results and optimization suggestions of the data processing and modeling module, including a burner flame rigidity and thermal power adaptive adjustment software and a primary air and powder three-parameter mixed intelligent control adjustment software; An execution module is electrically connected to the control decision module, and is used for receiving and accurately executing the instructions issued by the control decision module, so as to realize physical intervention and adjustment of the combustion process of the furnace, including a multi-parameter adjustment valve, a thermal kinetic energy adjustment valve, a secondary air and overfire air adjustment device, and a servo adjustment mechanism.

[0007] Preferably, the burner thermal kinetic energy measurement sensor includes a flame rigidity measurement subunit and a flame power measurement subunit; The primary air and powder flow state and property parameter measurement sensor includes an air and powder velocity measurement subunit, an air and powder concentration measurement subunit, an air and powder mass flow measurement subunit, a coal powder particle fineness measurement subunit, a coal powder particle composition measurement subunit, and a coal powder particle moisture content measurement subunit; The secondary air and overfire air measurement sensor includes an air flow measurement subunit, an air velocity measurement subunit, and an air angle measurement subunit; The measurement module further includes a signal transmitter electrically connected to the burner thermal kinetic energy measurement sensor, the primary air and powder flow state and property parameter measurement sensor, and the secondary air and overfire air measurement sensor, and is used for converting analog signals generated by the sensors into standardized digital signals, and transmitting the standardized digital signals to the central data processing cabinet of the data processing and modeling module through an industrial communication network.

[0008] Preferably, the central data processing cabinet of the data processing and modeling module adopts a high-performance industrial computer cluster architecture, and has functions of data acquisition and preprocessing, data analysis and integration, parameter calculation and feature extraction, data storage and management, and system-level communication interface; The hardware and software of the boiler combustion three-dimensional holographic intelligent control system includes a hardware part and a software part; The hardware part includes a high-resolution multi-view display system, a high-performance graphics processing unit cluster, and a high-bandwidth industrial network device; The software part includes a three-dimensional modeling and visualization engine, a real-time physical field simulation module, an artificial intelligence analysis and prediction module, and a combustion process optimization decision module; The data processing and modeling module further includes a thermal kinetic energy analysis software and a six-parameter analysis software, the thermal kinetic energy analysis software is configured in the central data processing cabinet and electrically connected to the burner thermal kinetic energy measurement sensor and its signal transmitter, and the six-parameter analysis software is configured in the central data processing cabinet and electrically connected to the primary air powder flow state and property parameter measurement sensor and its signal transmitter.

[0009] Preferably, the burner flame rigidity and thermal power adaptive adjustment software of the control decision module is configured in the central data processing cabinet and electrically connected to the thermal kinetic energy regulating valve and the servo adjusting mechanism, for adjusting the opening degree of the thermal kinetic energy regulating valve in real time according to the rigidity and power deviation of each burner flame identified in the digital holographic model and the optimization instructions generated by the artificial intelligence analysis and prediction module, to compensate for the influence of factors such as fuel fluctuation, air duct resistance change, and burner wear on flame characteristics, and to ensure that each burner flame always works within the optimal rigidity and rated power range; The primary air powder three-parameter mixing intelligent control adjustment software is configured in the central data processing cabinet and electrically connected to the multi-parameter regulating valve and the servo adjusting mechanism, adopts a multi-loop decoupling control strategy and a model predictive control algorithm, adjusts the multi-parameter regulating valve at high frequency according to the feedback of the combustion state in the furnace from the three-dimensional holographic model and the instructions of the combustion process optimization decision module, and ensures that the primary air powder mixture at the inlet of each burner maintains the optimal equivalence ratio, the best injection momentum, and the ideal fuel supply rate.

[0010] Preferably, the execution module includes: The multi-parameter regulating valve is configured at the front end of the primary air powder conveying pipeline of each burner, for comprehensively adjusting multiple parameters of the primary air powder mixture; The thermal kinetic energy regulating valve is configured at the primary air powder sub-mother tee outlet of each burner, for finely adjusting the rigidity and power of the burner flame; The secondary air and overfire air regulating equipment is configured at the outlet of each secondary air duct and overfire air duct, for accurately controlling the flow rate, speed, and injection angle of the secondary air and overfire air entering the furnace; The servo adjusting mechanism is electrically connected to the multi-parameter regulating valve, the thermal kinetic energy regulating valve, and the secondary air and overfire air regulating equipment, for providing high-precision, high-frequency, and dead-zone-free driving force and position feedback.

[0011] Preferably, the flame rigidity measurement sub-unit obtains the instantaneous geometric shape, temperature distribution and its time-varying spectral characteristics of each burner flame based on the anti-radiation thermal imaging array and coal powder impact oscillation frequency analysis technology, the anti-radiation thermal imaging array includes a plurality of high-frame-rate industrial-grade CMOS image sensors surrounding the burner nozzle, and the flame rigidity value is quantified by Fourier transform, wavelet analysis or empirical mode decomposition on the flame imaging data to extract the main frequency oscillation mode and amplitude attenuation characteristics; The flame power measurement sub-unit measures the net thermal radiation power of each burner flame in real time based on the wide-spectrum radiation heat flux sensor array and local transient temperature field analysis technology, the radiation heat flux sensor array includes a plurality of radiation heat flux sensors with different waveband response characteristics deployed in the main radiation area of the burner flame, the local transient temperature field is obtained by high-temperature thermocouple array or optical fiber temperature measurement technology, and the flame power value is calculated in real time by comprehensively considering the flame volume, radiation intensity, temperature field distribution and physical parameters in the combustion products, and using the pre-calibrated thermal radiation power model.

[0012] Preferably, the software part of the hardware and software of the boiler combustion three-dimensional holographic intelligent control system includes: The three-dimensional modeling and visualization engine performs high-precision three-dimensional reconstruction of the physical structure of the furnace, the spatial layout of the burners and the positions of various measurement points by computer graphics and geometric modeling algorithms, forms a dynamic three-dimensional data field based on real-time data obtained from the measurement module, and presents the shape, color, brightness, stability, temperature distribution, coal particle flow state and air flow field distribution of the flame in the furnace in a visual manner, forming an intuitive and real-time three-dimensional holographic image of the furnace combustion; The real-time physical field simulation module integrates computational fluid dynamics models and thermodynamic models based on finite element or finite volume methods, uses measurement data as boundary conditions and initial conditions, and performs sub-second real-time numerical simulation of the turbulent combustion, heat transfer, mass transfer and pollutant generation and conversion processes in the furnace to predict the parameters in the measurement blind area and quantitatively analyze the interaction between the burners and the flame and the furnace wall; The artificial intelligence analysis and prediction module is constructed based on deep learning and reinforcement learning algorithms, which is used for combustion state pattern recognition, identification of partial burning areas, local overheating risks, coking risks, pre-extinguishing signs and incomplete combustion areas in the furnace, prediction of the evolution trend of flame rigidity, power, pollutant emission and furnace outlet flue gas parameters of each burner in the future seconds to minutes, and construction of a multi-objective optimization function according to the economy, environmental protection and safety of the boiler operation.

[0013] Preferably, the multi-parameter regulating valve adopts a unique double-curve guide regulating valve plate structure, the valve plate is composed of two or more valve plates with specific curve profiles, the opening and relative position thereof can be independently controlled by the servo adjusting mechanism, allowing simultaneous and relatively independent adjustment of the velocity, concentration and mass flow of gas-solid two-phase flow, and the valve material is selected from high-wear-resistant and high-temperature-resistant special alloy steel. The thermal kinetic energy regulating valve adopts a unique double-hinge valve plate structure, the valve plate is composed of two hinge-shaped valve plates that can be independently or synchronously rotated, the rotation shafts thereof are parallel to the fluid channel of the valve, the opening angle and relative position of the double-hinge valve plate are controlled by the servo adjusting mechanism to change the initial momentum, diffusion angle and mixing area shape of the primary air powder jet entering the furnace, and the valve material is selected from high-heat-resistant and oxidation-resistant special alloy.

[0014] Advantages The present application provides a furnace combustion scene digital holographic intelligent control organization combustion system. 1. The furnace combustion scene digital holographic intelligent control organization combustion system successfully overcomes the inherent limitations of existing furnace combustion control systems in micro combustion state perception, fine regulation and dynamic response by constructing a furnace combustion scene digital holographic intelligent control organization combustion system.

[0015] 2. The furnace combustion scene digital holographic intelligent control organization combustion system realizes real-time and high-precision measurement of the flame characteristics of the multi-burner system, the primary air powder parameters, and the distribution of the secondary air and the overfire air, and on this basis, a closed-loop control system capable of three-dimensional digital holographic image modeling, intelligent analysis and adaptive organization adjustment of the furnace combustion scene is constructed.

[0016] 3. The furnace combustion scene digital holographic intelligent control organization combustion system can accurately solve the problem of boiler partial combustion, significantly improve the combustion efficiency, greatly reduce the emission of pollutants such as NOx and CO, reduce the carbon content of fly ash, prolong the service life of equipment, improve the stability of main steam temperature, and significantly improve the operation reliability and economy of coal-fired units under the demand of fast regulation and deep peak regulation of power grid. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 The system block diagram of the furnace combustion scene digital holographic intelligent control organization combustion system of the present application is shown in the figure; Fig. 2 The detailed structure block diagram of the data processing and modeling module of the present application is shown in the figure; Fig. 3 The working flowchart of the furnace combustion scene digital holographic intelligent control organization combustion system of the present application is shown in the figure. DETAILED DESCRIPTION

[0018] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0019] Please refer to Figs. 1-3 The furnace combustion scene digital holographic intelligent control organization combustion system provides a technical solution: comprising: The measurement module is configured in the furnace, the burner air inlet / powder inlet pipeline, the secondary air duct and the burnout air duct, and is used for high-precision and real-time measurement of key physical parameters in the furnace combustion scene, including a burner thermal kinetic energy measurement sensor, a primary air powder flow state and property parameter measurement sensor, and a secondary air and burnout air measurement sensor. The burner thermal kinetic energy measurement sensor includes a flame rigidity measurement subunit and a flame power measurement subunit. The flame rigidity measurement subunit obtains the instantaneous geometric shape, brightness distribution and time-varying spectral characteristics of each burner flame based on a counter-radiation thermal imaging array and a coal powder impact oscillation frequency analysis technology. The counter-radiation thermal imaging array includes a plurality of high-frame-rate industrial CMOS image sensors surrounding the burner nozzle. The flame rigidity value is quantified by extracting the main frequency oscillation mode and amplitude attenuation characteristics of the flame imaging data through Fourier transform, wavelet analysis or empirical mode decomposition. The flame power measurement subunit measures the net thermal radiation power of each burner flame in real time based on a wide-spectrum radiation heat flux sensor array and a local transient temperature field analysis technology. The radiation heat flux sensor array includes a plurality of radiation heat flux sensors with different waveband response characteristics arranged in the main radiation area of the burner flame. The local transient temperature field is obtained by a high-temperature thermocouple array or an optical fiber temperature measurement technology. The flame power value is calculated in real time by comprehensively considering the flame volume, radiation intensity, temperature field distribution and physical parameters in the combustion products, and using a pre-calibrated thermal radiation power model. The primary air powder flow state and property parameter measurement sensor includes an air-powder velocity measurement subunit, an air-powder concentration measurement subunit, an air-powder mass flow measurement subunit, a coal powder particle fineness measurement subunit, a coal powder particle composition measurement subunit and a coal powder particle moisture content measurement subunit. The secondary air and burnout air measurement sensor includes an air flow measurement subunit, an air velocity measurement subunit and an air angle measurement subunit. The measurement module further comprises signal transmitters electrically connected to the burner thermal energy measurement sensor, the primary air powder flow state and property parameter measurement sensor, and the secondary air and overfire air measurement sensor, for converting analog signals generated by the sensors into standardized digital signals, and transmitting the signals to the central data processing cabinet of the data processing and modeling module through an industrial communication network.

[0020] The data processing and modeling module is electrically connected to the measurement module, for receiving and processing massive real-time data from the measurement module, and constructing a digital holographic model of the combustion process inside the furnace, including a central data processing cabinet and a boiler combustion three-dimensional holographic intelligent control system hardware and software. The data processing and modeling module of the central data processing cabinet adopts a high-performance industrial computer cluster architecture, and has functions of data acquisition and preprocessing, data analysis and integration, parameter calculation and feature extraction, data storage and management, and system-level communication interface; The hardware part of the boiler combustion three-dimensional holographic intelligent control system hardware and software includes a high-resolution multi-view display system, a high-performance graphics processing unit cluster, and a high-bandwidth industrial network device; The software part of the boiler combustion three-dimensional holographic intelligent control system hardware and software includes a three-dimensional modeling and visualization engine, a real-time physical field simulation module, an artificial intelligence analysis and prediction module, and a combustion process optimization decision module; The data processing and modeling module further comprises thermal energy analysis software and six-parameter analysis software, the thermal energy analysis software being configured in the central data processing cabinet and electrically connected to the burner thermal energy measurement sensor and its signal transmitter, and the six-parameter analysis software being configured in the central data processing cabinet and electrically connected to the primary air powder flow state and property parameter measurement sensor and its signal transmitter; The software part of the boiler combustion three-dimensional holographic intelligent control system hardware and software includes: The three-dimensional modeling and visualization engine reconstructs the physical structure of the furnace, the spatial layout of the burners, and the positions of various measurement points in three dimensions with high precision through computer graphics and geometric modeling algorithms, forms a dynamic three-dimensional data field based on real-time data obtained from the measurement module, and presents the shape, color, brightness, stability, temperature distribution, coal particle flow state, and air flow field distribution of the flame inside the furnace in a visual manner, forming an intuitive and real-time three-dimensional holographic image of the furnace combustion; The real-time physical field simulation module integrates computational fluid dynamics models and thermodynamic models based on the finite element or finite volume method, uses measurement data as boundary conditions and initial conditions, and performs sub-second real-time numerical simulation on the turbulent combustion, heat transfer, mass transfer, and pollutant generation and conversion processes inside the furnace to predict parameters in the measurement blind area and quantitatively analyze the interaction between the burners and between the flame and the furnace wall; An artificial intelligence analysis and prediction module is constructed based on deep learning and reinforcement learning algorithms, is used for combustion state pattern recognition, identifies partial combustion areas, local overheating risks, coking risks, pre-extinguishing signs and incomplete combustion areas in the furnace interior, performs combustion process trend prediction, predicts flame rigidity, power, pollutant emissions and evolution trends of flue gas parameters at the furnace outlet of each burner in the future several seconds to several minutes, and constructs a multi-objective optimization function according to economy, environmental protection and safety of boiler operation and other multiple objectives.

[0021] A control decision module is electrically connected to the data processing and modeling module, is used for generating and issuing accurate control instructions including burner flame rigidity, thermal power adaptive adjustment software and primary air pulverized coal three-parameter mixed intelligent control adjustment software based on analysis results and optimization suggestions of the data processing and modeling module, the burner flame rigidity, thermal power adaptive adjustment software of the control decision module is configured in the central data processing cabinet, is electrically connected to the thermal kinetic energy adjustment valve and the servo adjustment mechanism, is used for adjusting the opening degree of the thermal kinetic energy adjustment valve in real time according to the flame rigidity and power deviation of each burner identified in the digital holographic model and the optimization instructions generated by the artificial intelligence analysis and prediction module, so as to compensate for the influence of factors such as fuel fluctuation, air duct resistance change and burner wear on flame characteristics, and ensure that the flame of each burner always works in the best rigidity and rated power range. The primary air pulverized coal three-parameter mixed intelligent control adjustment software is configured in the central data processing cabinet, is electrically connected to the multi-parameter adjustment valve and the servo adjustment mechanism, adopts a multi-loop decoupling control strategy and a model prediction control algorithm, adjusts the multi-parameter adjustment valve at a high frequency according to the feedback of the combustion state in the furnace from the three-dimensional holographic model and the instructions of the combustion process optimization decision module, and ensures that the primary air pulverized coal mixture at the inlet of each burner is kept at the optimal equivalence ratio, the best injection momentum and the ideal fuel supply rate.

[0022] An execution module is electrically connected to the control decision module, is used for receiving and accurately executing the instructions issued by the control decision module, realizes physical intervention and adjustment on the furnace combustion process, and includes the multi-parameter adjustment valve, the thermal kinetic energy adjustment valve, the secondary air and the overfire air adjustment equipment and the servo adjustment mechanism.

[0023] The execution module includes: The multi-parameter adjustment valve is configured at the front end of the primary air pulverized coal conveying pipeline of each burner, is used for comprehensively adjusting multiple parameters of the primary air pulverized coal mixture; The thermal kinetic energy adjustment valve is configured at the primary air pulverized coal sub-mother tee outlet of each burner, is used for finely adjusting the rigidity and power of the burner flame; The secondary air and the overfire air adjustment equipment are configured in each secondary air duct and overfire air duct, are used for accurately controlling the flow, speed and injection angle of the secondary air and the overfire air entering the furnace. Servo adjusting mechanism, electrically connected to multi-parameter adjusting valve, thermal kinetic energy adjusting valve and secondary air, overfire air adjusting device, for providing high-precision, high-frequency, dead-zone-free driving force and position feedback.

[0024] Multi-parameter adjusting valve adopts unique double-curve guide adjusting valve plate structure, valve plate is composed of two or more valve plates with specific curve profile, its opening and relative position can be independently controlled by servo adjusting mechanism, allowing simultaneous and relatively independent adjustment of gas-solid two-phase flow velocity, concentration and mass flow, valve material is selected from high-wear-resistant, high-temperature-resistant special alloy steel; Thermal kinetic energy adjusting valve adopts unique double-hinge valve plate structure, valve plate is composed of two independently or synchronously rotating hinge-shaped valve plates, its rotating shaft is parallel to the fluid passage of the valve, the opening angle and relative position of the double-hinge valve plate are controlled by the servo adjusting mechanism to change the initial momentum, diffusion angle and mixing area shape of the primary air powder jet entering the furnace when mixed with the secondary air, the valve material is selected from high-heat-resistant, oxidation-resistant special alloy.

[0025] The working process is as follows: First, the measurement module continuously collects a large amount of real-time data from the inside of the furnace and each air-powder pipeline, including burner flame thermal kinetic energy (flame rigidity, flame power), six parameters of primary air powder (velocity, concentration, mass flow, particle fineness, composition, moisture content), and three parameters of secondary air and overfire air (flow, velocity, angle). After these raw data are digitized and preliminarily checked by signal transmitters, they are transmitted to the central data processing cabinet through the industrial communication network.

[0026] Second, the central data processing cabinet receives and processes the digital signals from each sensor in time synchronization, denoising, analysis and integration, and transmits the processed data to the boiler combustion three-dimensional holographic intelligent control system. In the intelligent control system, the three-dimensional modeling and visualization engine constructs dynamic three-dimensional digital holographic images of the flame, coal powder flow and air field inside the furnace based on the processed data in real time. At the same time, the real-time physical field simulation module uses these data as boundary conditions to perform sub-second numerical simulation of the combustion, heat transfer and fluid dynamics process in the furnace, providing more comprehensive parameter prediction. The thermal kinetic energy analysis software and the six-parameter analysis software perform in-depth analysis on specific sensor data to extract accurate flame rigidity index, thermal power value and other key characteristic parameters such as primary air powder equivalence ratio and uniformity index.

[0027] Thirdly, the artificial intelligence analysis and prediction module deeply analyzes the three-dimensional holographic image, simulation results and characteristic parameters provided by the analysis software, and identifies the partial burning area, local overheating risk, low combustion efficiency area and high pollutant generation area in the furnace in real time, and based on the historical data and current working conditions, the module further predicts the combustion state evolution trend of the furnace in the next few seconds to minutes, and according to the preset economic, environmental and safety targets, a multi-objective optimization function is constructed, and the combustion process optimization decision module calculates the optimal control instructions for each burner, each secondary air / overfire air adjustment node, including the specific setting values of the multi-parameter regulating valve, the thermal power regulating valve and the secondary air / overfire air adjusting device, according to the analysis and prediction results of the artificial intelligence module.

[0028] Finally, the control decision module converts the control instructions generated by the optimization decision module into signals recognizable by the actuator, and the burner flame rigidity, thermal power adaptive adjustment software and primary air-powder three-parameter hybrid intelligent control adjustment software adjust the opening degree of the multi-parameter regulating valve and the thermal power regulating valve according to these instructions and through the cooperation with the servo adjusting mechanism, and at the same time, the secondary air and overfire air adjusting device also receives and executes the corresponding instructions to adjust the air volume, air speed and injection angle, and the servo adjusting mechanism drives various regulating valves and dampers with high precision, high frequency and no dead zone response capability, so as to realize real-time, adaptive and fine adjustment of the rigidity, power of the burner flame, primary air-powder parameters and distribution of secondary air and overfire air in the furnace, and the whole process forms a closed loop control to continuously optimize the combustion state of the furnace.

[0029] The present application solves the problem of lack of micro, spatial and real-time perception ability of the furnace combustion control system in the prior art, realizes real-time and high-precision measurement of the flame characteristics of the multi-burner system, the primary air-powder parameters and the distribution of secondary air and overfire air, and on this basis, builds a system capable of three-dimensional digital holographic image modeling, intelligent analysis and adaptive organization adjustment of the furnace combustion scene, and can accurately solve the problem of boiler partial burning, improve the combustion efficiency by at least 0.5%, reduce the generation of NOx by not less than 8%, reduce the carbon content of fly ash, prolong the service life of the equipment, improve the stability of the main steam temperature, and improve the operation reliability and economy of the coal-fired unit under the demand of fast regulation and deep peak regulation of the power grid It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0030] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, and it is intended that the scope of the application be limited solely by the scope of the appended claims and the equivalents thereof.

Claims

1. A digital holographic intelligent control organization combustion system for furnace combustion scene, characterized in that: The application relates to a furnace combustion process real-time monitoring and control system, which comprises the following parts: a measuring module arranged in a furnace, a burner air inlet / powder inlet pipeline, a secondary air duct and a combustion air duct, which is used for high-precision and real-time measurement of key physical parameters in a furnace combustion scene, including a burner thermal kinetic energy measuring sensor, a primary air powder flow state and property parameter measuring sensor and a secondary air and combustion air measuring sensor; a data processing and modeling module electrically connected to the measuring module, which is used for receiving and processing massive real-time data from the measuring module, and constructing a digital holographic model of a furnace internal combustion process, including a central data processing cabinet and a boiler combustion three-dimensional holographic intelligent control system hardware and software; a control decision module electrically connected to the data processing and modeling module, which is used for generating and issuing accurate control instructions based on analysis results and optimization suggestions of the data processing and modeling module, including a burner flame rigidity, thermal power self-adaptive adjustment software and a primary air powder three-parameter mixing intelligent control adjustment software; an execution module electrically connected to the control decision module, which is used for receiving and accurately executing the instructions issued by the control decision module, realizing physical intervention and adjustment of the furnace combustion process, including a multi-parameter adjustment valve, a thermal kinetic energy adjustment valve, a secondary air and combustion air adjustment device and a servo adjustment mechanism.

2. The digital holographic intelligent control combustion system for organizing combustion of a furnace combustion scene according to claim 1, characterized in that: The burner thermal kinetic energy measuring sensor comprises a flame rigidity measuring subunit and a flame power measuring subunit; The primary air powder flow state and property parameter measuring sensor comprises an air powder speed measuring subunit, an air powder concentration measuring subunit, an air powder mass flow measuring subunit, a coal powder particle fineness measuring subunit, a coal powder particle composition measuring subunit and a coal powder particle water content measuring subunit; The secondary air and combustion air measuring sensor comprises an air flow measuring subunit, an air speed measuring subunit and an air angle measuring subunit; The measuring module further comprises a signal transmitter electrically connected to the burner thermal kinetic energy measuring sensor, the primary air powder flow state and property parameter measuring sensor and the secondary air and combustion air measuring sensor, which is used for converting analog signals generated by the sensors into standardized digital signals, and transmitting the signals to the central data processing cabinet of the data processing and modeling module through an industrial communication network.

3. The digital holographic intelligent control combustion system for organizing combustion of a furnace combustion scene according to claim 1, characterized in that: The central data processing cabinet of the data processing and modeling module adopts a high-performance industrial computer cluster architecture, and has data acquisition and preprocessing, data analysis and integration, parameter calculation and feature extraction, data storage and management and system-level communication interface functions; The boiler combustion three-dimensional holographic intelligent control system hardware and software comprise a hardware part and a software part; The hardware part comprises a high-resolution multi-view display system, a high-performance graphics processing unit cluster and a high-bandwidth industrial network device; The software part comprises a three-dimensional modeling and visualization engine, a real-time physical field simulation module, an artificial intelligence analysis and prediction module and a combustion process optimization decision module; The data processing and modeling module further comprises thermal kinetic analysis software and six-parameter analysis software, the thermal kinetic analysis software is arranged in the central data processing cabinet and is electrically connected with the thermal kinetic energy measurement sensor and its signal transmitter of the burner, and the six-parameter analysis software is arranged in the central data processing cabinet and is electrically connected with the primary air powder flow state and property parameter measurement sensor and its signal transmitter.

4. The digital holographic intelligent control combustion system for organizing combustion of a furnace combustion scene according to claim 1, characterized in that: The burner flame rigidity and thermal power adaptive adjustment software of the control decision module is arranged in the central data processing cabinet and is electrically connected with the thermal kinetic energy adjusting valve and the servo adjusting mechanism, and is used for adjusting the opening degree of the thermal kinetic energy adjusting valve in real time according to the rigidity and power deviation of each burner flame identified in the digital holographic model and the optimization instruction generated by the artificial intelligence analysis and prediction module, so as to compensate the influence of fuel fluctuation, air duct resistance change and burner wear factors on the flame characteristics, and ensure that each burner flame always works in the optimal rigidity and rated power range; The primary air powder three-parameter mixed intelligent control adjustment software is arranged in the central data processing cabinet and is electrically connected with the multi-parameter adjusting valve and the servo adjusting mechanism, adopts a multi-loop decoupling control strategy and a model prediction control algorithm, adjusts the multi-parameter adjusting valve through high-frequency adjustment according to the feedback of the combustion state in the furnace from the three-dimensional holographic model and the instruction of the combustion process optimization decision module, and ensures that the primary air powder mixture at the inlet of each burner is kept at the optimal combustion equivalence ratio, the optimal injection momentum and the ideal fuel supply rate.

5. The digital holographic intelligent control combustion system for organizing combustion of a furnace combustion scene according to claim 1, characterized in that: The execution module comprises: The multi-parameter adjusting valve is arranged at the front end of the primary air powder conveying pipeline of each burner and is used for comprehensively adjusting multiple parameters of the primary air powder mixture; The thermal kinetic energy adjusting valve is arranged at the primary air powder sub-mother tee outlet of each burner and is used for finely adjusting the rigidity and power of the burner flame; The secondary air and overfire air adjusting equipment is arranged in each secondary air duct and overfire air duct and is used for accurately controlling the flow, speed and injection angle of the secondary air and overfire air entering the furnace; The servo adjusting mechanism is electrically connected with the multi-parameter adjusting valve, the thermal kinetic energy adjusting valve and the secondary air and overfire air adjusting equipment and is used for providing high-precision, high-frequency and dead-zone-free driving force and position feedback.

6. The digital holographic intelligent control combustion system for organizing combustion of a furnace combustion scene according to claim 2, characterized in that: The flame rigidity measurement subunit obtains the instantaneous geometric shape, temperature distribution and time-varying spectral characteristics of each burner flame based on the anti-radiation thermal imaging array and the coal powder impact oscillation frequency analysis technology, the anti-radiation thermal imaging array comprises a plurality of high-frame-rate industrial CMOS image sensors surrounding the burner nozzle, and the flame rigidity value is quantified by extracting the main frequency oscillation mode and amplitude attenuation characteristics of the flame imaging data through Fourier transform, wavelet analysis or empirical mode decomposition; The flame power measurement subunit measures the net thermal radiation power of each burner flame in real time based on a broadband radiative heat flux sensor array and local transient temperature field analysis technology. The radiative heat flux sensor array includes multiple radiative heat flux sensors with different band response characteristics deployed in the main radiation area of ​​the burner flame. The local transient temperature field is obtained through a high-temperature thermocouple array or fiber optic temperature measurement technology. The flame power value is calculated in real time by comprehensively considering the flame volume, radiation intensity, temperature field distribution, and physical parameters in the combustion products using a pre-calibrated thermal radiation power model.

7. The digital holographic intelligent control combustion system for organizing combustion of a furnace combustion scene according to claim 3, characterized in that: The software component of the three-dimensional holographic intelligent control system for boiler combustion includes: The 3D modeling and visualization engine uses computer graphics and geometric modeling algorithms to perform high-precision 3D reconstruction of the physical structure of the furnace, the spatial layout of the burner, and the positions of various measuring points. Based on real-time data obtained from the measurement module, a dynamic 3D data field is formed, and the shape, color, brightness, stability, temperature distribution, coal powder particle flow pattern, and air flow field distribution of the flame in the furnace are presented in a visual way, forming an intuitive and real-time 3D holographic image of furnace combustion. The real-time physical field simulation module integrates computational fluid dynamics and thermodynamic models based on the finite element or finite volume method. It uses measurement data as boundary and initial conditions to perform sub-second real-time numerical simulations of turbulent combustion, heat transfer, mass transfer, and pollutant generation and transformation processes inside the furnace. This allows for the prediction of parameters in the measurement blind zone and quantitative analysis of the interactions between burners and between the flame and the furnace wall. The artificial intelligence analysis and prediction module, built on deep learning and reinforcement learning algorithms, is used to identify combustion state patterns, such as uneven burning areas, local overheating risks, coking risks, signs of flameout, and incomplete combustion areas inside the furnace; predict combustion process trends, forecasting the evolution trends of flame rigidity, power, pollutant emissions, and flue gas parameters at the furnace outlet for each burner over the next few seconds to minutes; and construct a multi-objective optimization function based on multiple objectives of boiler operation, including economy, environmental protection, and safety.

8. The digital holographic intelligent control combustion system for organizing combustion of a furnace combustion scene according to claim 5, characterized in that: The multi-parameter regulating valve adopts a unique hyperbolic flow guiding regulating valve plate structure. The valve plate is composed of two or more valve plates with specific curve profiles. Its opening degree and relative position can be independently controlled by the servo regulating mechanism, allowing it to simultaneously and relatively independently regulate the velocity, concentration and mass flow rate of the gas-solid two-phase flow. The valve material is selected from special alloy steel with high wear resistance and high temperature resistance. The thermal energy regulating valve adopts a unique double-hinged valve plate structure. The valve plate consists of two hinged valve plates that can rotate independently or synchronously. The rotation axis is parallel to the fluid channel of the valve. The opening and closing angle and relative position of the double-hinged valve plates are controlled by the servo regulating mechanism to change the initial momentum, diffusion angle and mixing zone morphology of the primary air-coal jet when it enters the furnace. The valve material is selected from a high heat-resistant and oxidation-resistant special alloy.

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