91 results about "Boiler control" patented technology

The invention relates to the technical field of boiler control, and discloses a gas-fired boiler starting control method and system. The method comprises the following steps: acquiring initial operation parameters such as hearth pressure, water inlet temperature, flue gas oxygen content and fuel valve opening of the gas-fired boiler, establishing a thermodynamic state model in a starting stage according to the initial operation parameters, and dividing dynamic response thresholds of different load intervals; and calculating a theoretical fuel supply rate of the combustor based on the model, generating and dynamically updating a fuel supply correction coefficient in combination with a threshold value, synchronously marking key nodes according to abnormal distribution of hearth temperature, and adjusting a spatial air distribution strategy of the combustor. And after the correction coefficient is subjected to multi-stage buffer smoothing, a fuel control instruction is output to an executing mechanism. And switching to steady state control after the boiler reaches the preset load. The method adapts to the characteristics of a power plant unit, so that the starting process is more stable, the damage to a heated surface and pollutant emission are reduced, and rapid grid connection is assisted.

The invention relates to the technical field of boiler control, in particular to a multivariable coupling thermal process regulation and control system and method for carbon pollution governing, and the method comprises the steps: collecting multi-source data such as acoustic emission, temperature, humidity and spectrum, and constructing a feature sequence through time mark alignment and wavelet packet enhancement; a heat value characterization quantity is predicted by using a Shenchang differential equation model fused with dynamic gating, a partition equivalent thermal network model is driven on this basis, and accurate prediction of a future time domain temperature field is realized by dynamically correcting thermal resistance and thermal capacity; based on the prediction result, a control instruction is solved through multi-objective optimization under the condition that the active temperature constraint is met; and in combination with heat flow density feedback, a layered reinforcement learning controller is adopted for online compensation of a pre-feedback instruction, and stable and efficient regulation and control of the boiler are achieved.

The invention belongs to the technical field of coal-fired boiler control, and particularly relates to a system and a method for dynamically regulating and controlling the structural design of a separated coal bunker and the blending combustion proportion of fire coal. According to the method, the correction coefficient is generated through the small-scale blending combustion experiment data, and the initial proportion calculation model is calibrated, so that the proportion design conforms to the theoretical constraint and adapts to the actual combustion characteristics of the coal type, and the theoretical and actual deviation is reduced; combustion efficiency and pollutant emission trend are predicted on line based on a fire coal combustion prediction model, dynamic adjustment of a fire coal blending combustion proportion is realized in combination with a progressive adjustment rule and an extreme working condition response rule, combustion parameter fluctuation is avoided, a verified alternative scheme is called, environmental protection and combustion stability are met, response time is shortened, and the method is suitable for large-scale popularization and application. The reliability in a fault state is improved; by automatically updating the fire coal combustion prediction model, prediction-adjustment-update closed-loop optimization is realized, the regulation and control error is gradually reduced along with the operation time, and the high regulation and control precision is kept for a long time.

The invention discloses a digital control integrated system for an auxiliary workshop of a power plant, and relates to the field of digital control, which comprises the steps of configuring sensor layout and measuring points, acquiring operating parameters based on sensors, acquiring processing parameters based on sensors, acquiring noise data based on sensors, and acquiring parameters of a heat supply system based on sensors. A multi-level sensor arrangement and operation parameter acquisition module, an industrial Ethernet control and multi-protocol interconnection communication module, a dynamic threshold comparison and combined cycle working condition analysis module and a cooperative control and multi-system synchronous scheduling module are configured in a power plant auxiliary workshop. The closed-loop monitoring and secondary correction control module and the historical database archiving and optimization learning module realize unified acquisition, centralized control and intelligent optimization of a gas turbine control system, a steam turbine control system, a waste heat boiler control system, a chemical water treatment control module, an environmental protection monitoring system and a heat supply system adjusting device.

The invention provides an operation data analysis method and system of a heat supply system, and relates to the technical field of building environment and energy application engineering.The method comprises the steps that if a diagnosis result shows that no abnormity exists, differential operation strategies are generated based on building historical room temperature, building characteristics and real-time meteorological parameters in a multi-source fusion data set; obtaining meteorological prediction data in a preset time period; based on the differentiated operation strategy and meteorological prediction data, predicting heat load demand change through a long short-term memory network; and calculating a target output parameter set value by taking the room temperature reaching the standard and the lowest energy consumption as an optimization target based on the change of the thermal load demand, and sending the set value to a boiler control system for execution. According to the invention, through multi-source data fusion and real-time analysis, closed-loop intelligent operation from abnormal accurate diagnosis to demand prediction regulation is realized, so that the reliability, energy efficiency and comfort level of the heat supply system are comprehensively improved.

The invention discloses a boiler flue gas temperature compound control method and system based on multiple regression, and belongs to the field of thermal power generation boiler control. The method adopts a feedforward-feedback composite control structure, and comprises the following steps: generating a feedforward control signal through a pre-trained multiple regression model; meanwhile, based on the deviation between the actual smoke temperature and the target smoke temperature, a feedback control signal is generated through a PID controller; and combining the feedforward control signal with the feedback control signal to generate a final control instruction for coordinating and controlling a first flue gas baffle and a second flue gas baffle on parallel flues at an outlet of a boiler economizer. The baffles are controlled in a coordinated mode, the flue gas flow proportion of different heat exchange degrees is changed, and then the temperature of the mixed flue gas is accurately controlled. The prediction capability of the model and the rectification capability of PID are combined, the response speed and precision of the control system are improved, and the robustness of the system under the variable fuel ratio working condition is enhanced.

The invention provides an intelligent operation control system and method for a waste heat boiler, and belongs to the field of boiler control, and the intelligent operation control system comprises a boiler water supplementing subsystem which is used for continuously supplementing water and adjusting the liquid level of a heat balance storage tank; the steam heating subsystem is used for heating boiler water and adjusting the temperature; the boiler water circulation subsystem is used for carrying out circulation heat exchange and adjusting pressure; the automatic control subsystem is used for collecting a liquid level signal, a temperature signal, a pressure signal and system operation working condition parameters of the heat balance storage tank in real time, and carrying out working condition self-adaptive weight distribution and multi-loop coordination control based on the liquid level signal, the temperature signal, the pressure signal and the system operation working condition parameters; and multivariable abnormal evaluation and hierarchical protection control are carried out on the operation state of the waste heat boiler. The operation stability and control precision of the waste heat boiler are improved, temperature overshoot and unnecessary protection shutdown are reduced, and the service life of equipment is prolonged.

According to the fluidized bed boiler control system and the bed pressure self-adaption accurate control method, the control system adjusts the frequency of a flue gas induced draft fan to achieve the stability of the hearth pressure of the fluidized bed boiler, and under the condition that a return feeder is adjusted, the bed pressure self-adaption accurate control method is achieved by controlling the air supply amount of a primary air fan of a combustor at the bottom of the fluidized bed boiler and the fuel amount of a fuel system. And a fuzzy control system deslagging distributor is used for adjusting the operation frequency to carry out deslagging control, so that the bed pressure of the control system can be controlled more quickly, stably and accurately.

The application is a kind of mother-pipe boiler coordinated control system and method, the control system includes pressure control module, flow control module, boiler control module, combustion control module, collection processing module, model prediction module, generation module. The pressure control module calculates the deviation value between the real-time pressure and the preset pressure value, the flow control module allocates the steam flow of each sub-pipe based on the deviation value, the boiler control module and the combustion control module are responsible for calculating the target boiler fuel quantity according to the steam flow respectively, and adjusting the boiler load parameter to generate the corresponding steam flow, so that the stable pressure control of the mother-pipe can be realized, the mother-pipe reaches the pressure balance state, improves the automation level and operation efficiency of the mother-pipe boiler coordinated control system, reduces the safety hidden danger and production cost, realizes the accurate control and fast response of the boiler mother-pipe steam pressure.

The invention discloses a fuel grading time sequence cutting method for a multi-fuel multi-fuel combustion boiler under the FCB working condition of a steel mill, and belongs to the field of power plant boiler control. According to the method, aiming at a hearth 11-section combustor, a multi-fuel collaborative removal strategy is provided, after an FCB is triggered, a fuel target value is set to be 17 t / h coal feeding amount, an AB layer 2 / 4 horn combustion-supporting oil gun and A layer ignition oil are synchronously put into operation, one COG is reserved, the fuel pressure is maintained to be 1.8 MPa for automatic control, and the air volume is locked to be 550 t / h. Fuel cutting adopts four-stage sequential control: 1) cutting off a first layer of emulsion at the same time; (2) the coal mills trip one by one according to the E-D-C-A sequence at the interval of 2 s, and a single coal mill is kept to operate; 3, BFG combustors are cut off in a grouping mode at the interval of 3 s, a diagonal single cutting mode is adopted, and the interlayer interval is 2 s, and 4, COG tripping is conducted in sequence at the interval of 1.5 s, and tail end ignition oil is retained. Dynamic matching of fuel switching and a hearth system is achieved through override control, the combustion stability problem of the low-heating-value BFG is solved, and it is ensured that the total fuel quantity does not exceed the rated load by 30%.

The invention relates to the technical field of boiler control, in particular to an intelligent pre-judgment starting control method for boiler multi-parameter coupling. According to the technical scheme, the intelligent pre-judgment starting control method for boiler multi-parameter coupling comprises a control process of intelligent pre-judgment starting control for boiler multi-parameter coupling; a thermal stress dynamic balance system is constructed through multi-parameter real-time acquisition and an intelligent pre-judgment algorithm, a high-precision temperature / stress sensor array is deployed at key parts of a boiler, thermal expansion coefficients and stress states of all areas are mapped in real time, historical starting data are trained through an LSTM neural network, a thermal stress prediction model is formed, and the thermal stress prediction model is used for predicting the thermal stress of the boiler. A potential stress concentration area is recognized in advance, a dynamic control module adjusts combustor power distribution and cooling water flow according to a prediction result, accurate matching of the temperature rise rate of all the areas is achieved, thermal stress distribution uniformity is improved, metal damage caused by local overheating is avoided, and meanwhile fuel consumption and carbon emission are reduced by optimizing heat exchange efficiency.

The application provides an electric water boiler control device, and relates to the technical field of equipment management. The electric water boiler control device comprises a power supply, a control mechanism and an electric water boiler connected in sequence. The control mechanism comprises a first circuit breaker connected with the power supply, a time control switch connected with an output end of the first circuit breaker, an alternating current contactor connected with a zero line end of the time control switch, and the alternating current contactor connected with the electric water boiler. The time control switch is used for closing a contact point when a current time is in a preset time period, controlling the alternating current contactor to be closed, and making the electric water boiler work under power. In this way, the problem that a traditional electric water boiler cannot be flexibly controlled to be opened and closed according to a user's work period, resulting in energy waste, can be solved.

The application relates to the technical field of gas boiler control, in particular to a gas boiler temperature control method and system, which comprises the following steps: collecting raw material hyperspectral data of a heating and stirring furnace in a lubricating oil preparation process at each moment; obtaining a raw material heating uniformity change coefficient at each moment according to the differences in band reflectivity and spatial distribution characteristics of pixels in the raw material hyperspectral data at each moment; obtaining a heating and stirring furnace temperature adaptation degree by combining the raw material heating uniformity and the raw material heating uniformity change coefficient; and controlling the temperature of the heating and stirring furnace according to the numerical distribution of the heating and stirring furnace temperature adaptation degrees at all moments before the current moment. The application can realize intelligent control of the gas boiler temperature in the lubricating oil preparation process and improve the temperature control precision.

The application provides a kind of operation data analysis method and system of heating system, it is related to building environment and energy application engineering technical field, the method includes: if diagnosis result is no exception, based on the building historical room temperature in multi-source fusion data set, building characteristics and real-time meteorological parameters, generate different operation strategy;Obtain the meteorological prediction data of preset time period;Based on the different operation strategy and meteorological prediction data, the change of heat load demand is predicted by long short-term memory network;Based on the change of heat load demand, with room temperature standard and minimum energy consumption as optimization goal, the target output parameter set value is calculated, and the set value is sent to the boiler control system to execute.The application realizes closed-loop intelligent operation from abnormal accurate diagnosis to demand prediction regulation through multi-source data fusion and real-time analysis, so as to comprehensively improve the reliability, energy efficiency and comfort of heating system.

The invention discloses a chain-grate boiler control method, device and equipment and a medium, and relates to the technical field of chain-grate boiler control. The method comprises the steps that a flame radiation image in a chain-grate boiler is collected through video collection equipment; based on preset flame analysis software, determining a temperature field corresponding to the chain boiler, a live wire length and a current fuel material layer thickness according to the flame radiation image; the length of the live wire is used for representing the range length of a main combustion area of the chain-grate boiler; using a pre-trained material layer thickness prediction model to predict the fuel material layer thickness after the target time according to the temperature field, the live wire length and the current fuel material layer thickness; according to the external thermal load requirement, the temperature field, the live wire length and the fuel material layer thickness after the target time, an adjusting strategy is determined, the fire grate speed, the blast speed and the fuel material layer thickness of the chain boiler are adjusted based on the adjusting strategy, and control over the chain boiler is achieved. Therefore, the problem that the combustion state in the furnace cannot be visually monitored is solved.

According to the present invention, a method for monitoring an operation state of a boiler 1 comprises: an exhaust gas collection step S1 for collecting exhaust gas generated by combustion of fuel fed into a combustion furnace 2 of the boiler 1; and an estimation step S2 for estimating the contained amount of alkali metals and / or chlorine on the basis of the contained amount of fine salt particles in the exhaust gas having been collected in the exhaust gas collection step S1.

The invention relates to the technical field of gas heating water heater control, and provides a self-adaptive control method and system for a full-premixing gas heating water heater. The current opening instruction of the gas proportional valve is monitored in real time, the opening instruction deviation is determined in combination with the preset reference operation parameters, the change trend of the opening instruction deviation is analyzed, the performance degradation of the gas proportional valve is accurately recognized, a performance compensation factor is determined accordingly, and the current opening instruction is corrected according to the performance compensation factor. Therefore, precise adjustment of gas supply is achieved. The problems of low combustion efficiency, unstable heat output, equipment failure and the like caused by performance degradation of the gas proportional valve are solved, the combustion efficiency, the operation stability and the user experience of the full-premixing gas heating water heater are remarkably improved, the service life of the equipment is prolonged, and the maintenance cost is reduced.

The invention discloses a clean energy storage and heat supply system, and relates to the field of comprehensive energy systems, the clean energy storage and heat supply system comprises a heat pump, an electric boiler, a control center, a control device and a power supply module; the heat pump is used for converting solar energy and air energy into heat energy, and the working state is started by default; the electric boiler is used for converting electric energy into heat energy, and the default working state is closed; the control center is used for acquiring environment temperature data, calculating heat pump energy efficiency data according to the heat pump working data and generating a control instruction according to the environment temperature data and the heat pump energy efficiency data; the control device is used for controlling working states of the electric boiler and the heat pump according to the control instruction; the power supply module is connected with the heat pump, the electric boiler, the control center and the control device and used for providing electric energy. The technical problems that when the solar heat pump works in the extremely cold area, the efficiency is low, and even the solar heat pump cannot work and run can be solved.

The application relates to the technical field of boiler control, and discloses a boiler coal gas combustion system and a control method. The system comprises a boiler, a plurality of blast furnace gas burners, the plurality of blast furnace gas burners being uniformly arranged on the circumferential side of the boiler and extending into the hearth inside the boiler, a plurality of coke oven gas burners, the plurality of coke oven gas burners being uniformly arranged on the circumferential side of the boiler and extending into the hearth inside the boiler, wherein the coke oven gas burners are located below the blast furnace gas burners in opposition, and an air combustion air duct for providing air for the blast furnace gas burners and the coke oven gas burners. The technical scheme disclosed by the application can improve the safety of ignition of the boiler coal gas combustion system and the fullness of coal gas combustion, and can improve the safety of operating personnel and main equipment.

To provide an input estimation device and a power generation system that can accurately estimate the input of combustibles into a fluidized bed type boiler by using existing equipment.SOLUTION: An input estimation device 1B estimates the input of combustibles D into a fluidized bed type boiler 1A in a power generation system 1 for generating power by using steam generated by heat exchange with exhaust gas discharged from the fluidized bed type boiler 1A, and comprises: an input unit into which the amount and oxygen concentration of the exhaust gas, the amount and temperature of air flowing into the fluidized bed type boiler 1A, the temperature of feedwater supplied to the fluidized bed type boiler 1A, and the amount of the steam are input; and an estimation unit for estimating the amount of the combustibles on the basis of input values in the input unit.SELECTED DRAWING: Figure 1

Disclosed, in one general aspect, is a boiler controller that includes an input for receiving a boiler water level signal, a screen having a data display that displays information. The data display includes an alphanumeric status indicator area responsive to the water level signal and operative to display status information about the water level signal in alphanumeric format, and a background indicator that extends around the alphanumeric status area and is operative to display a visual treatment that communicates different boiler safety levels. Disclosed in another general aspect is a boiler controller that includes an input for receiving a boiler water level signal and a compound level indicator that includes a vertically extending level-indicating device, a baseline reference level indicator positioned along the vertically extending level level-indicating device, and a visual treatment for the vertically extending level-indicating device that communicates different boiler safety levels. Water level outputs are also disclosed.

The invention belongs to the technical field of coal-fired boiler control, and particularly relates to a tobacco production coal-fired boiler control method which comprises the following steps: transforming a coal-fired boiler, and constructing a boiler DCS (Distributed Control System); constructing a coal-fired boiler control model; according to the coal-fired boiler control model, the pulse width modulation parameter of a water mother pipe water pump variable-frequency governor, the opening degree of a boiler feed water regulating valve, the pulse width modulation parameter of a grate motor and a variable-frequency governor of an air feeder, the pulse width modulation parameter of a hearth induced draft fan variable-frequency governor and a deaerator steam regulating valve are calculated respectively. The valve opening degree of the water inlet adjusting valve achieves full-automatic combustion of the boiler. According to the scheme provided by the invention, the pressure of the water supply mother pipe, the water level of the boiler drum, the air-coal ratio, the hearth induced draft fan and the deaerator can be stably controlled by constructing the adjusting model of the water supply mother pipe, the boiler drum water, the air-coal ratio, the hearth negative pressure and the deaerator, so that stable operation of the boiler is realized, and the requirements of gas load and rapid supply of a tobacco production process are met.

The application relates to the field of boiler control and environmental protection technology, and discloses a control method for continuously monitoring biomass boiler flue gas, which comprises the following steps: S1, collecting pollutant concentration data in biomass boiler flue gas in real time, wherein the pollutants include carbon monoxide, carbon dioxide, nitrogen oxide and sulfur dioxide; and S2, transmitting the collected pollutant concentration data to a data processing module, and a control system for continuously monitoring biomass boiler flue gas is also provided, which is used for executing the control method for continuously monitoring biomass boiler flue gas, and comprises a data acquisition module used for collecting temperature, pressure and pollutant concentration data in boiler flue gas in real time through a sensor array. The application combines real-time data and an optimization algorithm, uses Kalman filtering denoising and a multi-factor mathematical model to predict pollutant concentration, dynamically adjusts boiler operation parameters, improves energy efficiency, reduces pollutant emission, and solves the problems of inaccurate control and slow response in traditional technologies.

The invention discloses an intelligent combustion optimization method and system based on combustion process key parameters, and relates to the technical field of boiler control, a control parameter set needing to be optimized is determined, and a heat value supply evaluation index curve and a combustion efficiency curve are obtained; a curve segment with the calorific value supply evaluation index meeting a preset standard is intercepted, and a corresponding combustion efficiency curve segment and a control parameter sequence group are extracted; based on the quantitative expression of the control parameter sequence grouping and the combustion efficiency curve segment, image conversion is carried out to construct an image expression model, and more dynamic expressions are generated through similarity expansion; and performing matching analysis on real-time control parameters by utilizing the dynamic expression of the expanded image expression model to realize optimization and adjustment. According to the method, the dynamic cooperation mode in the high combustion efficiency state can be accurately mined from complex multi-parameter historical data, a reliable real-time optimization reference basis is provided, the combustion efficiency is effectively improved, and energy consumption and pollutant emission are reduced.

The utility model provides a kind of electrode boiler electrode loss rate monitoring device with loss early warning function, including shell, data processing unit, early warning output unit and power module are arranged in shell, data processing unit is connected with several non-contact thickness detection probes, several non-contact thickness detection probes are distributed along the electrode rod axial length direction, and the distance between probe and electrode rod surface is 1mm-5mm;Non-contact thickness detection probe is fixed by mechanical clamp, the data processing unit is connected with early warning output unit, the early warning output unit is connected to boiler control system by industrial bus, and power module is connected with data processing unit and early warning output unit.The utility model can monitor the loss condition of electrode rod in real time, accurately, and timely issue early warning when loss reaches preset threshold, guarantee the safe and stable operation of electrode boiler.

The invention discloses a multifunctional control system of a hot water boiler / hot water unit. The multifunctional control system comprises an electric cabinet / control electric appliance assembly, a box type stand column / main electric appliance assembly and a base assembly which are movably connected through damping pins / bolts. The movable connection mode has the advantages that the sight angle of the touch screen is adjustable, and the two control cabinets can be combined into one cabinet to be used as a floor cabinet or a hanging cabinet; the researched and developed simulation pointer type outdoor climate compensation energy saver system is integrated with a hot water boiler control system and a human-computer interface, so that the cost can be reduced, the monitoring is visual, and the operation is convenient; the system has an automatic working mode, a manual working mode, an outdoor climate compensation energy-saving working mode and a network remote monitoring mode. A set of mechanical temperature control emergency working system is additionally provided for preventing accidents when working in severe environments such as cold areas, long-distance navigation cruise ships and military ships; the folding recording board and the folder on the back of the cabinet are designed in a humanized manner, so that convenience is brought to a user; according to the invention, the technical problems of products in historical backgrounds are solved.

The invention discloses a self-adaptive precise combustion control system and method for a waste incineration boiler based on digital twinning and AI feedforward, and belongs to the technical field of combustion control of incinerators. The problems that an existing waste incineration boiler is unstable in combustion working condition, large in temperature fluctuation range, unstable in steam yield and parameter and poor in control precision in power generation are solved. The system comprises an online sensing system, a digital twinborn model, an AI feedforward-feedback cooperative controller and a boiler control system. The on-line sensing system detects the physical and chemical characteristics of the garbage fed into the furnace in real time; the digital twinborn model is constructed based on a combustion first principle, and the combustion working condition in the next 3-5 minutes is simulated and predicted in combination with garbage characteristics and the real-time state of a boiler; the AI controller generates an optimal feedforward control instruction through a pre-trained deep reinforcement learning model according to the prediction result, and dynamically adjusts the fire grate speed, the air volume and the auxiliary fuel; and the boiler control system executes the instruction to realize accurate control. The method is suitable for incinerator control.

The utility model belongs to the technical field of gas-fired boiler control equipment, and particularly relates to gas-fired boiler heat supply control equipment which comprises a boiler body, a boiler sleeve shell is fixedly connected to the outer surface of the boiler body, two installation blocks are fixedly connected to the outer surface of the boiler sleeve shell, and two operation grooves are formed in each installation block. And dampers are fixedly connected into the multiple operation grooves, sliding rods are fixedly connected to the output ends of the dampers, first concave blocks are fixedly connected to the outer surfaces of the sliding rods, and rotating rods are rotationally connected into the first concave blocks. The limiting plate drives the sliding rod to slide in the running groove, the sliding rod drives the first concave block to slide together, when the first concave block slides, the first concave block drives the rotating rod in the first concave block to rotate, then the rotating rod drives the second concave block at the other end to move, and meanwhile the inserting block is pushed to slide out of the inserting groove. And the slot and the controller can be taken down from the interior of the mounting block, so that the controller can be mounted and dismounted more stably, and the controller is prevented from falling off.

The invention relates to the technical field of boiler control, and discloses a cooperative control method, device, medium and system for combustion and adherence air of a boiler, and the method comprises the steps that a three-dimensional hearth combustion model of the boiler is constructed based on CFD numerical simulation; based on the distribution relevance between the CO volume fraction of the near wall surface and the corrosion area, establishing a quantitative relation between the combustion parameters and the high-temperature corrosion rate; according to the quantitative relation, dynamically optimizing the combustion parameters through a multi-parameter orthogonal test to obtain optimized combustion parameters; a gradient different-diameter adherent air nozzle is arranged in the high-risk corrosion area; and cooperative control is conducted on the boiler based on the optimized combustion parameters and the close-to-wall air configuration. According to the invention, the high-temperature corrosion rate of the water cooling wall of the boiler can be reduced, and meanwhile, the amplification of the carbon content of fly ash is also reduced.

The invention relates to the technical field of boiler operation control, and discloses a thermal power plant boiler operation control method and system.The thermal power plant boiler operation control method comprises the steps that the hearth temperature of a boiler in a preset time period is obtained, and the boiler state is determined according to the hearth temperature of the boiler in the preset time period; when the boiler state is a normal state, obtaining a thermal efficiency change curve of the boiler, and determining a boiler control strategy according to the thermal efficiency change curve of the boiler; and when the boiler state is the abnormal state, determining the abnormal type of the boiler according to the hearth temperature of the boiler in the preset time period, and determining a boiler control strategy according to the abnormal type of the boiler. According to the invention, efficiency and safety of the boiler during operation can be considered, and online analysis and control of boiler operation optimization are realized.