546 results about "Combustion process" patented technology

The invention provides a method for constructing a thickened flame surface model of hydrogen turbulent combustion, which belongs to the technical field of hydrogen fuel engines, and specifically comprises the following steps: modeling a diffusion enhancement effect and a flame surface wrinkle effect caused by multi-scale turbulent flow by constructing a hydrogen fuel turbulent flame speed scale rate under a wide working condition; and the combustion process of the hydrogen fuel can be described more accurately. In addition, on the basis of a thin reaction zone combustion mode, key physical quantities are extracted, a combustion efficiency function is optimized, multi-scale turbulence and a difference diffusion effect are considered, and the thickened flame surface model is further perfected. The development of the method provides powerful technical support for the forward design of the hydrogen fuel engine based on numerical simulation, promotes the engineering application of the hydrogen fuel engine, and assists the hydrogen fuel engine to play a greater role in efficient, clean and safe energy transformation.

The invention discloses a machine learning multi-objective optimization control method based on coal quality characteristics and combustion state feedback, and belongs to the technical field of industrial process automatic control. According to the method, collaborative optimization control over the combustion efficiency, NOx emission and combustion stability is achieved under the multi-working-condition operation condition of the combustor. According to the method, coal quality characteristic parameters and combustion state data are collected, working condition clustering is carried out after data fusion, and a historical combustion operation data set coupling coal quality characteristics and combustion states is constructed; a combustion state evaluation model and a combustion control model are established by adopting machine learning, on the basis of identifying working conditions in real time and evaluating combustion performance, a control parameter adjustment amount is generated in combination with trend extrapolation and a multi-objective cost function, and a combustion state feedback rolling correction model and a control strategy are utilized to realize combustion control. The self-adaptive closed-loop collaborative optimization control of the combustion process under multiple coal types and multiple working conditions is realized, the boiler efficiency is improved, the NOx emission is reduced, and the operation robustness is enhanced.

The invention belongs to the technical field of industrial combustion safety control, and provides a double-channel industrial furnace gas combustion safety interlocking control system which comprises a gas / air flow ratio dynamic monitoring module, a flue CO concentration online detection module, a double-channel data conflict arbitration processor and a visual human-computer interface. Aiming at the prominent problems of incomplete combustion of coal gas, carbon deposition, detonation risk and the like which are easy to occur under the working condition of accelerated temperature rise, the system integrates visual double-insurance safety control of dynamic calculation of a flow ratio and real-time analysis of tail gas components, and all-directional safety protection in the combustion process is realized through a multi-parameter cooperative monitoring and intelligent interlocking mechanism; the detonation risk is obviously reduced; meanwhile, the air-fuel ratio fluctuation is accurately controlled within the range of + / -5%, and the carbon deposition phenomenon is effectively reduced; and remarkable economic benefits are created while reliable operation of equipment is guaranteed.

The invention discloses an in-cylinder flame multi-characteristic parameter extraction and instantaneous evaluation method based on machine learning, and belongs to the technical field of power energy. Aiming at the problem that a traditional method is difficult to accurately extract flame transient characteristic parameters in a dynamic combustion environment, the method comprises the following steps: acquiring an in-cylinder flame image sequence through an endoscopic high-speed camera, and extracting an event driving key frame and a uniform time key frame by adopting optical flow analysis and fixed interval sampling; utilizing a double-flow feature extraction network to respectively obtain flame spatial form features and radiation features; capturing a flame parameter time evolution law through a time sequence convolutional network, and dynamically fusing key frame features in combination with a self-attention mechanism; and finally outputting flame temperature field and soot distribution prediction results. According to the method, instantaneous evaluation of the combustion process is realized, and a basis is provided for engine performance optimization and combustion fault diagnosis.

A method of controlling a deflagration combustion process in a pistonless combustor includes scavenging combustion products of the previous cycle, introducing air into the combustor thereby initiating a flow pattern having a first flow component within the combustor, introducing air into the pistonless combustor in a nonparallel angle in relation to the previous air input and thereby creating a second flow component to the flow pattern for increasing speed of combustion propagation, introducing fuel mixed into the air creating a fuel-air mixture flowing within the flow pattern, igniting the fuel-air mixture within the pistonless combustor and introducing fuel by direct injection after the ignition thereby increasing pressure within the pistonless combustor.

The invention relates to the technical field of intelligent fuel supply, in particular to an intelligent optimization method and system for fuel supply of a thermal power plant based on multi-source information fusion. The method comprises the following steps: collecting multi-source heterogeneous data and carrying out space-time alignment and normalization processing; constructing a coal as fired calorific value soft measurement model by adopting a physical constraint corrected LSTM network; generating a transportation delay predicted value and probability distribution thereof through an XGBoost regression model; calculating a comprehensive risk score in combination with a Bayesian risk network; solving a Pareto optimal solution set under the constraint of an inventory safety threshold by adopting a depth deterministic strategy gradient network, and generating a fuel scheduling instruction; and updating the as-fired coal calorific value soft measurement model on line. Through combination of the physical constraint corrected LSTM network and multi-source time sequence data fusion and regularization training, the fire coal calorific value prediction precision is remarkably improved, and the problems that a traditional method depends on off-line assay, response is lagged, and the real-time dynamic state of the combustion process is difficult to reflect are solved.

The invention discloses a chemical looping combustion material circulation method and chemical looping combustion equipment. The chemical looping combustion material circulation method comprises the steps that heat carrier particles and oxygen carrier particles are mixed in an air reactor, the oxygen carrier particles and oxidizing airflow are subjected to an oxidation reaction and release heat, and the heat carrier particles absorb the heat by making contact with the oxygen carrier particles; the flow speed of the oxidizing gas flow is adjusted, heat carrier particles are selectively separated out by means of the difference of the fluidization characteristics of the heat carrier particles and oxygen carrier particles, and the separated oxygen carrier particles are conveyed to a fuel reactor; heat is extracted from the separated heat carrier particles, and then the heat carrier particles are discharged or flow back to the air reactor. The invention relates to a chemical looping combustion technology, and provides a chemical looping combustion material circulation method and chemical looping combustion equipment, heat carrier particles are introduced, the heat carrier particles absorb heat released by oxidation of oxygen carrier particles and transmit the heat to a heating surface of a heat recovery structure, and effective extraction of heat in the chemical looping combustion process is achieved.

The invention relates to the technical field of oxygen-enriched combustion safety and flammability limit prediction, and provides a flammability limit value prediction method and application, and the method comprises the steps: obtaining the initial parameters of a gas fuel in a mixed atmosphere of oxygen and carbon dioxide; simulating a combustion process by using an element reaction mechanism, and outputting a curve of component mole fractions changing along with time; the combustion enthalpy change rate under the target atmosphere and the virtual atmosphere is calculated based on the curve, and carbon dioxide in the virtual atmosphere is replaced with virtual gas which has the same thermophysical property but does not have chemical reactivity; respectively calculating combustion heat release, mixture heat absorption and heat radiation; and in combination with the enthalpy change rate and the energy balance equation, the combustible limit value is solved and determined through numerical iteration. By quantifying the chemical effect and thermophysical influence of carbon dioxide, the problem of insufficient precision caused by neglecting the participation of carbon dioxide in reaction and unique thermal property in the oxygen-enriched combustion environment in the existing model is solved, and the method is suitable for the safety design of a combustion system.

The invention relates to the technical field of boiler combustion control, in particular to a through-flow boiler ultra-low nitrogen combustion control system based on multistage flue gas recirculation. Comprising a flue gas grading circulation unit; the low-nitrogen combustion regulation and control unit is used for realizing staged mixed combustion of fuel and circulating flue gas, and a staged combustion structure is matched with an air-fuel ratio dynamic regulation technology; the working condition parameter sensing unit is used for acquiring boiler combustion and flue gas state parameters in real time, integrating a multi-source sensor module and constructing a multi-dimensional operation parameter set; and the intelligent cooperative control unit is used for coordinating dynamic control of the ultra-low nitrogen combustion process. High-temperature and low-temperature independent flue gas circulation branches are arranged through the flue gas staged circulation unit, and a staged combustion structure of a main combustion section and a re-combustion section of the low-nitrogen combustion regulation and control unit is combined, so that the problem of non-uniform distribution of a hearth temperature field caused by compact combustion space and dramatic change of a flow field of the through-flow boiler can be solved; therefore, the generation of thermal nitrogen oxides is inhibited.

The invention discloses a preparation method and application of a double-biomass carbon source coated ammonium polyphosphate intumescent flame retardant with a core-shell structure. Ammonium polyphosphate is used as a core, composite coating of chitosan and zinc stannate is achieved through an ion exchange reaction and a chelation reaction, then a lignin shell layer is introduced through a Mannich reaction, and the lignin and chitosan double-carbon-source coated intumescent flame-retardant antibacterial synergist is obtained. The flame retardant disclosed by the invention is simple and convenient in preparation process and high in safety, most of the raw materials are derived from green renewable biomass materials with low cost, and the flame retardant has environment-friendly characteristic and excellent polymer compatibility. The microcapsule surface modification technology enhances the interfacial interaction between the additive and the polymer matrix, systematic optimization of the flame retardant property of the composite material is realized, and when the flame retardant is used for modifying the TPU material, the molten drop phenomenon and a large amount of dense smoke generated in the combustion process can be effectively inhibited, and the TPU composite material can be endowed with excellent long-acting antibacterial property.

The invention relates to a thermal power plant coal blending combustion optimization method based on multi-source data and an intelligent algorithm, and the method comprises the steps: obtaining the multi-source data from a fuel management and control platform, a coal yard digital system, a unit operation monitoring system, and an environmental protection monitoring system in real time, establishing a dynamic database including coal quality data, real-time inventory, unit operation constraints and environmental protection constraints; based on the dynamic database, taking the minimization of the total fire coal cost in the future T hours as a target function, and taking stable operation of a boiler, an environmental protection emission index and equipment processing capacity as constraint conditions, establishing a corresponding fire coal blending optimization model for each load period, and forming a multi-period optimization model; solving the multi-period optimization model by adopting an improved genetic algorithm to generate an optimal blending scheme sequence; through online monitoring, according to the optimal blending scheme, adopting a preset control strategy to realize closed-loop optimization of the combustion process; according to the invention, the comprehensive optimization of the fire coal cost, the combustion efficiency and the environment-friendly emission is realized.

The invention discloses a three-dimensional pressure field measurement method for spray flame measurement in an optical engine, and belongs to the technical field of optical imaging applied to spray flame measurement in the optical engine. The implementation method comprises the following steps of: establishing a Cartesian coordinate system in the transparent cylinder of the optical engine, and applying a tomographic particle image velocity measurement method to the diagnosis of a spray flow field or a flame combustion process in the transparent cylinder of the optical engine; and calculating first-order derivatives of the three-dimensional velocity field distribution in time and three space directions. And substituting the first-order derivatives of time and space into a Navier Stokes equation to calculate and obtain pressure gradient field distribution in three space directions. And calculating the three-dimensional pressure relative distribution of the whole space to be measured relative to the pressure reference point through a direct integration method. A real pressure value at the pressure reference point is determined through a cylinder pressure sensor in the optical engine, and then three-dimensional pressure field distribution of the whole space to be measured is obtained.

The invention discloses an intelligent power generation method, device and equipment for a thermal power plant, and relates to the technical field of industrial automation control, and the method comprises the steps: dividing the preprocessed historical operation data into typical working condition clusters through employing a K-means clustering algorithm; extracting a clustering center feature vector of each cluster and splicing the clustering center feature vector with the original data to construct a training data set; then training a combustion optimization reference model by adopting the training data set; in the real-time operation process, the working condition clusters are matched, and the combustion optimization reference model is called to obtain a power generation action control optimization value; and finally, introducing a dynamic revision coefficient calculated based on the control deviation at the previous moment, and correcting the preliminary optimization value to generate a final control instruction. According to the method, working condition characteristics are refined through clustering, deep learning model parameters are optimized through an intelligent algorithm, closed-loop feedback is constructed through dynamic revision coefficients, the problems of low control precision, model drifting and the like caused by strong nonlinearity, large lag and frequent fluctuation of working conditions in the combustion process of the thermal power plant are effectively solved, and the combustion efficiency and economical efficiency are remarkably improved.

This utility model relates to the field of stove technology, specifically a stove core structure, including an inner tube and an outer tube. The inner tube is open at the bottom and closed at the top, while the outer tube is closed at the bottom and open at the top. The space between the inner and outer tubes forms a combustion chamber. Several air inlet pipes are evenly arranged around the circumference of the outer tube at its lower part. Ventilation openings are also provided at the lower and upper parts of the outer tube. Several evenly arranged ventilation openings are provided on the wall of the inner tube. This utility model replaces ventilation openings with evenly distributed air inlet pipes at the lower part of the outer tube. On the one hand, this prevents the combustion flame at the bottom of the combustion chamber from escaping through the ventilation openings at the lower part of the outer tube. On the other hand, the air inlet pipes guide air into the bottom of the combustion chamber more orderly, providing a sufficient and stable oxygen supply for fuel combustion at the bottom. This solves the technical problems of existing stove core structures easily causing flame escape during combustion and fuel waste due to incomplete combustion within the combustion chamber.

The invention provides an aviation gasoline composition, aviation gasoline and a preparation method thereof, and relates to the field of aviation fuel oil. The aviation gasoline composition provided by the invention comprises petroleum-based alkylated gasoline, a component A, a component B and a component C. The component A comprises C4-C7 alkane, the component B comprises C8 isoparaffin, and the component C comprises C7-C9 aromatic hydrocarbon. The aviation gasoline composition provided by the invention can be used for obtaining 95 # lead-free aviation gasoline under the condition of not containing any substances such as metal, oxide, nitride, sulfide and the like, and the fraction is more continuous, safer and more environment-friendly in the combustion process.

The invention provides a pulverized coal concentration device based on a charge method and a control method of the pulverized coal concentration device, and belongs to the field of combustion of coal-fired boilers. The problems that a traditional inertia separation technology is low in separation efficiency and prone to abrasion in the low-load stable combustion process of the pulverized coal boiler are solved. Comprising a corona discharge device, a grounding device, a central discharge device, a concentrated pulverized coal pipeline and a light-phase pulverized coal pipeline, a guide plate is arranged at an inlet of the concentrated pulverized coal pipeline, one end of the light-phase pulverized coal pipeline is inserted into the concentrated pulverized coal pipeline, and the other end of the light-phase pulverized coal pipeline is located on the outer side of the concentrated pulverized coal pipeline; the corona discharge device is arranged on the outer side wall, corresponding to the insertion section of the light-phase pulverized coal pipeline, of the concentrated pulverized coal pipeline, the grounding device is of an annular structure and arranged on the outer side of the corona discharge device in a surrounding mode, and a wear-resistant lining is arranged on the inner wall of the concentrated pulverized coal pipeline. The device is mainly used for improving the pulverized coal concentration of the pulverized coal boiler during low-load operation.

The application discloses a high-temperature and high-pressure combustion chamber spectrum characteristic transmission device based on a special optical fiber probe head, which comprises an optical fiber probe head, a light guide optical fiber, a light emitting characteristic analysis device and a cooling liquid pump; the optical fiber probe head comprises high-transmittance optical glass, a metal cooling sleeve and an optical flange; the high-transmittance optical glass can transmit ultraviolet-visible light with a wavelength of 100-760 nm; the metal cooling sleeve comprises a cylindrical sleeve and a connecting cap; the cylindrical sleeve is coaxially arranged on the outer periphery of the high-transmittance optical glass and is sealingly arranged in a probe head mounting hole; the light guide optical fiber can collect the ultraviolet-visible light transmitted through the high-transmittance optical glass and is connected with the light emitting characteristic analysis device; and the cylindrical sleeve and the connecting cap are both provided with cooling channels connected with the cooling liquid pump. The application can analyze the chemical reaction light emitting characteristics in the high-temperature and high-pressure combustion chamber in real time, is especially suitable for monitoring the spontaneous radiation characteristics of OH*, CH* and C2* groups generated in the combustion process, and thus can determine the reaction region and the reaction heat release.

The application provides a flexible encapsulated aerogel composite material and a preparation method thereof. The flexible encapsulated aerogel composite material uses titanium carbide as a conductive filler, uses carboxylated cellulose nanofiber as an aerogel skeleton, and uses a thermoplastic polyurethane / silicon wrapped ammonium polyphosphate composite material as an encapsulated outer layer. The flexible encapsulated aerogel composite material prepared by using the technical scheme has super-high electromagnetic shielding efficiency, can obviously reduce the fire risk of the aerogel, and reduce the release of heat and toxic smoke gas in the combustion process, so that the application of the flexible encapsulated aerogel composite material in wearable materials, home decoration, aerospace, electronic communication, transportation and the like is effectively widened.

The invention is suitable for the technical field of artificial intelligence, and provides a converter working condition prediction method and device based on multi-modal data fusion and a medium. The method comprises the steps that a historical multi-modal data set of a target converter is collected, and a dry returning state and a splashing state are marked; the multi-modal data comprises flame images, sonar signals, smoke components and combustion process parameters; based on the labeled historical multi-modal data set, constructing and training a working condition prediction model which takes the multi-modal data of the target converter as input and takes a dry returning state and a splashing state as output; collecting current multi-modal data of the target converter, inputting the current multi-modal data into the working condition prediction model, performing data alignment on the current multi-modal data, and performing feature extraction and feature fusion to obtain a fused feature vector; and a prediction result is determined based on the fusion feature vector, the prediction result is used for indicating the dry return state and the splashing state of the target converter in the future preset time period, and the accuracy of dry return prediction and splashing prediction is improved.

This invention provides a method and apparatus for circulating hot air through a main pipe in gravel production. The method includes feeding coal gangue with a particle size of 20-80mm into the ignition section of a decarbonization combustion device, and sequentially passing through a first self-ignition stage, a second self-ignition stage, a homogenization stage, a first cooling stage, and a second cooling stage before exiting the decarbonization combustion device. Simultaneously, high-temperature hot air from the first cooling stage is fed into a high-temperature main pipe; low-temperature hot air from the second cooling stage is fed into a low-temperature main pipe; the low-temperature hot air in the first branch pipe mixes with the high-temperature hot air and enters the homogenization stage; the low-temperature hot air in the second branch pipe mixes with the high-temperature hot air and enters the second self-ignition stage; the low-temperature hot air in the third branch pipe mixes with the high-temperature hot air and enters the first self-ignition stage; and the low-temperature hot air in the fourth branch pipe directly enters the ignition stage. The flue gas generated in the ignition stage, the first self-ignition stage, the second self-ignition stage, and the homogenization stage is then led out of the decarbonization combustion device. This invention achieves adjustable flue gas temperature range during the combustion stage, as well as stable combustion and temperature control during the combustion process.

This invention relates to the technical field of coal grinding, and more particularly to a coal grinding method and its screening device. The method includes: first, placing coal into a coal mill for grinding; then, using a screening component to screen the coal layer by layer, separating qualified coal from unqualified coal; finally, using the screening component to screen the steel balls during grinding, and further processing the screened steel balls, such as cleaning or replacing them. The method also includes a screening component and functional components. The design of the screening component in the coal mill allows for the automatic screening of steel balls that are no longer efficiently grinding coal powder due to consumption. The functional components, acting within the coal mill, improve the grinding effect, thereby enhancing the efficiency and stability of the coal powder combustion process. The entire screening device can automatically identify steel balls that need to be replaced or discarded, reducing manual operation time and labor costs.

The invention relates to the technical field of thermal power generation equipment, in particular to a thermal power plant boiler low-NOx pulverized coal burner and a burning method thereof.The thermal power plant boiler low-NOx pulverized coal burner comprises an air supply mechanism, an air supply device is arranged on one side of the air inlet end of the air supply mechanism, a burning chamber is arranged at the air outlet end of the air supply mechanism, and an ignition gun penetrating through the air inlet end and the air outlet end is arranged in the air supply mechanism; a combustion-supporting gas conveying mechanism is further communicated between the combustion chamber and the air outlet end and comprises a combustion-supporting gas sleeve and a flow dividing sleeve, the flow dividing sleeve is communicated with the air outlet end, the combustion chamber is located in the flow dividing sleeve, a flow dividing plate is arranged between the flow dividing sleeve and the combustion chamber, and combustion-supporting gas nozzles and rotational flow channels which are staggered are arranged on the flow dividing plate. The combustion-supporting gas sleeve is arranged on the outer side of the flow dividing sleeve in a sleeving mode, a combustion-supporting gas inlet pipe is arranged on the bottom side of the combustion-supporting gas sleeve, and a combustion-supporting gas spraying pipe is arranged on the inner side of the combustion-supporting gas sleeve, extends into the flow dividing sleeve and is located on one side of the combustion-supporting gas nozzle. By optimizing the structural design and combustion process control of the combustor, generation and emission of NOx are effectively reduced, meanwhile, the combustion efficiency is improved, the adaptability to different coal types is enhanced, and the equipment cost and the maintenance difficulty are reduced.

The invention discloses a boiler intelligent combustion accurate air distribution dynamic balance method. The method comprises the steps of multi-dimensional data acquisition, data preprocessing and feature extraction, combustion state intelligent identification, air distribution parameter dynamic optimization and closed-loop control execution. According to the boiler intelligent combustion accurate air distribution dynamic balance method, fuel characteristics, combustion states, flue gas components and air distribution operation full-dimension information are comprehensively captured through a multi-dimension data acquisition system, a scientific feature extraction method is combined to provide a solid basis for combustion state recognition, the combustion type and the unbalance degree are accurately judged by means of a CNN-LSTM mixed model, and the intelligent combustion accurate air distribution dynamic balance method has the advantages of being high in practicability and high in practicability. Then, targeted optimization of the flow, the air speed and the spraying angle of primary air, secondary air and tertiary air is achieved through a dynamic balance algorithm, the problems that ignition is difficult due to insufficient primary air, combustion is insufficient due to uneven distribution of secondary air, and pollution is increased due to excessive tertiary air are solved from the source, air distribution parameters are highly matched with combustion working conditions, and the combustion efficiency is improved. And the combustion process is promoted to tend to an ideal equilibrium state.

The utility model discloses waste gas treatment equipment for acrylic emulsion production, relates to the field of waste gas treatment equipment, and aims to solve the problems that in the prior art, waste gas generated in acrylic emulsion production is combusted by adopting a combustion chamber and then is directly discharged, but some smoke is generated in the combustion process; and air pollution can be caused by direct emission. The lower end of one side of the combustion tower is fixedly connected with a gas inlet guide pipe, the lower end in the combustion tower is fixedly connected with a conical gas collecting hopper in an inverted mode, the middle of the upper end of the conical gas collecting hopper is fixedly connected with a gas outlet pipe, and one side of the upper end of the gas outlet pipe is fixedly connected with an ignition gun on the inner end face of the combustion tower. The upper end of the other side of the combustion tower is connected with a smoke filtering device, a filter screen is arranged in the middle of the end face of one side in the smoke filtering device, the lower end of the smoke filtering device is connected with a detachable dust collecting box, and one side of the smoke filtering device is connected with a tail gas treatment box.

This utility model belongs to the field of waste treatment technology, and in particular to a white mud treatment device, including a crushing box, a feeding hopper, and an incineration boiler. The crushing box is fixedly installed on one side above the base; a feeding pipe is fixed to the bottom of the crushing box, and an incineration boiler is fixed to one side of the feeding pipe. The incineration boiler has a furnace chamber inside, and a flue pipe is fixedly connected to one side of the incineration boiler. Sludge and white mud are mixed in a specific ratio. The alkaline components CaCO₃ and Ca(OH)₂ of the white mud react chemically with the acidic pollutants in the sludge, such as sulfur and nitrogen compounds, during combustion. The sludge provides the calorific value of organic matter combustion, and the white mud provides an alkaline adsorbent, reducing the amount of fuel and desulfurizing agent used. During combustion, the CaO generated by the decomposition of white mud directly reacts with SO₂ and NOx in the flue gas, reducing the load on subsequent desulfurization processes. The CaO, SiO₂, and other components in the ash after combustion can be directly used in building materials.

The invention relates to the technical field of boiler combustion control, in particular to a boiler intelligent combustion precise air distribution online monitoring system which comprises a combustion state sensing module, a combustion state sensing module, an execution adjusting module, an online monitoring feedback module and a data storage and visualization module. According to the boiler intelligent combustion precise air distribution online monitoring system, through fusion of multi-dimensional combustion state perception and a deep learning algorithm, intelligent self-adaptive optimization of an air distribution scheme is achieved, a traditional manual experience adjustment and single parameter control mode is abandoned, and the intelligent combustion precise air distribution online monitoring system is high in practicability. Key information in the combustion process is comprehensively captured by multiple types of sensors such as infrared thermal imaging and flue gas analysis, air volume, air speed and air temperature adjusting instructions of primary air, secondary air and tertiary air are accurately output through data preprocessing and fusion model operation, and complex working conditions such as fuel type change and load fluctuation can be dynamically adapted; real-time decision making and regulation can be completed without manual intervention, and the intelligent level of boiler combustion control is improved.

The present disclosure provides a method and system for diagnosing wear of a fuel system of a diesel engine. The method comprises: acquiring injection parameter data of the fuel system in an injection combustion process, and pressure signal data in an oil pipe; collecting particulate matters in exhaust gas in the injection combustion process by using an electrostatic deposition sampler, and shooting images of the particulate matters by using a microscopic camera device to extract morphology data of the particulate matters from the images; emitting pulsed laser to the particulate matters by using a laser-induced breakdown spectrometer to excite plasma emission characteristic spectrum in the particulate matters to obtain composition data of the particulate matters according to the characteristic spectrum; extracting features of the injection parameter data, the morphology data of the particulate matters and the composition data of the particulate matters respectively to obtain injection features, morphology features of the particulate matters and composition features; performing time-frequency analysis on the pressure signal data to obtain pressure features; and inputting the injection features, the pressure features, the morphology features and the composition features into a wear diagnosis model to obtain a wear diagnosis result.

This invention discloses an intelligent combustion control method and system based on online fiber optic detection of flame signals. The method monitors the flame light signal emitted by the burner via fiber optic cable, analyzes the signal to predict pollutant concentrations, and performs fuzzy adjustment and defuzzification on the burner's feedback signal based on the predicted values, thereby achieving intelligent and adaptive control of the combustion process. This method can quickly respond to changes in combustion conditions, optimize control strategies, ensure the stability and environmental friendliness of the combustion process, overcome the technical bottlenecks of high cost and poor real-time performance, effectively reduce system hardware costs, and improve the intelligence level of the control process.

The invention discloses a boron-phosphorus synergistic starch-based single-component intumescent flame retardant as well as a preparation method and application thereof. Starch, phytic acid, boric acid, allantoin and the like are used as raw materials, and the boron-phosphorus synergistic starch-based single-component intumescent flame retardant integrating an acid source, a carbon source and a gas source is designed and prepared. The flame retardant provided by the invention is simple and convenient in preparation process and high in safety, most of the raw materials of the flame retardant are derived from green renewable biomass materials with low cost, and the flame retardant has environment-friendly characteristic and excellent polymer compatibility. The synergistic effect of the phytic acid boron component in a flame-retardant system can be fully exerted by regulating and controlling the ratio of boron to phosphorus, when the flame retardant is applied to a polylactic acid (PLA) material, the influence on the mechanical property of the PLA is small, the PLA can be endowed with excellent flame retardance, the molten drop phenomenon and a large amount of dense smoke in the combustion process of the PLA can be effectively inhibited, and the biodegradation speed of the PLA can be increased.

The embodiment of the invention discloses a temperature rise method of an in-situ transmission electron microscope heating chip for simulating ignition powder combustion, relates to the technical field of heating chips, and can accurately simulate the temperature change in the ignition powder combustion process. The method comprises the steps that the relation between the temperature and time in the ignition powder combustion process is determined; according to the relationship between the temperature and the current in the heating process of the heating chip of the in-situ transmission electron microscope, determining the relationship between the current and the time of the heating chip in the process of simulating the combustion of the ignition powder; configuring a circuit system of the heating chip by using the relationship between the current and the time; a temperature measuring piece is arranged on the heating chip, and a circuit system of the heating chip can adjust the current of the heating chip according to the temperature measured by the temperature measuring piece. The method is suitable for an in-situ transmission electron microscope simulation ignition powder combustion scene.