Control system for boiler

Abstract

The invention relates to the technical field of fossil fuel boilers, in particular to a control system for a boiler, and the system comprises an operation data collection module which is used for collecting operation data based on the fuel input quantity, the steam output quantity, the heat loss quantity, the combustion temperature, the excess air coefficient, the hearth temperature and the flue gas temperature parameters of the boiler, and obtaining a boiler operation parameter set. According to the method, the refined data analysis method can clearly reveal the energy efficiency problem of the boiler in actual operation, and energy utilization optimization is facilitated. In addition, through systematic statistics of pollutant emission, a comprehensive environmental influence model can be established, and specific guidance is provided for improving the environmental protection performance of the boiler. And meanwhile, through deep economic performance analysis, control over fuel and maintenance cost is more scientific, and the energy-saving effect is effectively improved. And the optimal balance among the energy efficiency, the environmental influence and the economic performance is found through comprehensive evaluation.

Description

Technical Field

[0001] The present invention relates to the technical field of fossil fuel boilers, and in particular to a control system for boilers. Background Art

[0002] The field of fossil fuel boiler technology involves systems that use fossil fuels such as coal, oil and natural gas to generate thermal energy. These boilers are key components in industry and power generation, used to generate steam or heat water. Technology development focuses on improving combustion efficiency, reducing polluting emissions, and optimizing the management and recovery of thermal energy. With the improvement of environmental protection standards, modern fossil fuel boiler technology also emphasizes the use of advanced emission control technologies, such as desulfurization and denitrification systems, as well as reducing carbon dioxide emissions through thermal efficiency improvements.

[0003] The main purpose of the boiler control system is to ensure that the boiler operates under safe, efficient and economical conditions. It optimizes the performance of the boiler by adjusting parameters such as the amount of combustion air, fuel supply and water supply.

[0004] However, existing technologies have significant deficiencies in the process of boiler monitoring and evaluation. Relying on a single monitoring indicator, it is difficult to fully capture the operating performance of the boiler, resulting in an inability to effectively evaluate fuel utilization and energy efficiency. This limitation makes it difficult to identify potential heat loss and pollutant emission problems. For example, failure to promptly reflect fluctuations in excess air coefficient and combustion temperature may result in reduced combustion efficiency, leading to unnecessary energy loss and environmental pollution. In addition, the lack of systematic economic analysis and the lack of basis for the control of operating and maintenance costs can easily lead to waste of resources and increased economic burden. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a control system for a boiler.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: The control system for the boiler includes:

[0007] The operation data acquisition module collects the operation data based on the boiler's fuel input, steam output, heat loss, combustion temperature, excess air coefficient, furnace temperature and flue gas temperature parameters to obtain the boiler operation parameter set;

[0008] The energy efficiency analysis module compares the fuel input and steam output in the boiler operation parameter set, calculates the heat energy conversion efficiency, accumulates the heat loss, determines the total heat loss value, calculates the combustion efficiency according to the combustion temperature, excess air coefficient and furnace temperature, compares the heat energy conversion efficiency with the combustion efficiency, analyzes the energy utilization of the boiler, determines the energy loss ratio in combination with the total heat loss value, and obtains the energy efficiency evaluation result;

[0009] The environmental impact assessment module calculates the CO2, NO x and SO x Pollutant emissions: statistics on emissions, combined with flue gas temperature, establish an environmental impact model, and obtain pollutant emission assessment results;

[0010] An economic performance analysis module calculates fuel cost, maintenance cost and operating cost according to the boiler operating parameter set, energy efficiency evaluation results and economizer efficiency, analyzes initial investment cost and life cycle cost in combination with the savings after energy efficiency improvement, and obtains economic performance evaluation results;

[0011] The comprehensive sustainability module standardizes the energy efficiency assessment results, pollutant emission assessment results and economic performance assessment results, sets weight coefficients for energy efficiency, environmental impact and economic performance, performs weighted calculations on the standardized data, summarizes the weighted calculation results and derives a sustainability rating.

[0012] As a further solution of the present invention, the boiler operation parameter set includes fuel input, steam output, heat loss, combustion temperature, excess air coefficient, furnace temperature and flue gas temperature parameters; the energy efficiency evaluation result includes thermal energy conversion efficiency, total heat loss value, combustion efficiency and energy utilization rate; the pollutant emission evaluation result includes CO2, NO x and SO x The economic performance evaluation results include fuel cost, maintenance cost, operating cost and life cycle cost.

[0013] As a further solution of the present invention, the operation data acquisition module includes:

[0014] The fuel data acquisition submodule uses sensors to monitor the fuel inflow rate and steam output rate in real time based on the fuel input and steam output parameters of the boiler, continuously samples the fuel input and steam output, adds time stamps to the sampled data, and stores them in the data record to obtain the fuel steam data set;

[0015] The temperature data acquisition submodule uses a temperature sensor and a gas analyzer to measure the temperature and oxygen content in the furnace based on the fuel steam data set, organizes the collected data, records the excess air coefficient, and obtains a temperature parameter data set;

[0016] The parameter integration submodule, based on the fuel steam data set and the temperature parameter data set, performs time synchronization processing on the two sets of data, matches the parameter values ​​at the corresponding time, checks the data integrity, processes missing or abnormal data, integrates them into a unified data set, and obtains the boiler operation parameter set.

[0017] As a further solution of the present invention, the energy efficiency analysis module includes:

[0018] The thermal energy efficiency calculation submodule extracts related data based on the fuel input and steam output in the boiler operation parameter set, calculates the fuel consumption and steam output per unit time, calculates the ratio of fuel consumption to steam output, and obtains the thermal energy conversion efficiency value;

[0019] The combustion efficiency evaluation submodule extracts related data based on the combustion temperature, excess air coefficient and furnace temperature in the boiler operation parameter set, calculates the difference between the current combustion temperature and the theoretical combustion temperature, analyzes the influence of excess air on the combustion process, calculates the combustion efficiency, compares the combustion efficiency with the heat energy conversion efficiency value, and obtains the combustion efficiency difference value;

[0020] The energy loss analysis submodule accumulates the heat loss in the boiler operating parameter set, calculates the total heat loss value, combines the combustion efficiency difference value, determines the energy utilization of the boiler, calculates the energy loss ratio, and obtains the energy efficiency evaluation result.

[0021] As a further solution of the present invention, the environmental impact assessment module includes:

[0022] The pollutant calculation submodule extracts the operating data under each condition based on the boiler operating parameter set and calculates the corresponding CO2, NO x and SO x Emissions, the calculation results are collated to obtain the pollutant emission data set;

[0023] The emission statistics submodule performs statistical analysis on the pollutant emission data set, summarizes the pollutant emissions under each operating condition, draws an emission trend chart, and obtains emission statistics results;

[0024] The environmental modeling submodule establishes an environmental impact model based on the emission statistics and the flue gas temperature, simulates the pollutant diffusion under each condition, determines the degree of impact on the environment, and obtains the pollutant emission assessment result.

[0025] As a further solution of the present invention, the economic performance analysis module includes:

[0026] The cost calculation submodule extracts fuel consumption and equipment operation time data according to the boiler operation parameter set and combined with the economizer efficiency, calculates the fuel cost, and calculates the maintenance and operation related expenses to obtain a cost data set;

[0027] The benefit analysis submodule combines the energy efficiency evaluation results, calculates the savings brought by the energy efficiency improvement, analyzes the economic benefits of the energy-saving improvement measures, and obtains a benefit data set;

[0028] The economic evaluation submodule compares the initial investment cost with the total cost during the life cycle based on the cost data set and the benefit data set, calculates the investment payback period and the net present value, and obtains the economic performance evaluation result.

[0029] As a further aspect of the present invention, the integrated sustainability module comprises:

[0030] The data standardization submodule extracts data from the energy efficiency evaluation results, pollutant emission evaluation results, and economic performance evaluation results, and converts each indicator into a standardized value using a unified scale to obtain a standardized data set;

[0031] The weighted calculation submodule sets weight coefficients for energy efficiency, environmental impact and economic performance, uses a fuzzy comprehensive evaluation method to perform weighted calculation on each indicator in the standardized data set, and accumulates the weighted values ​​to obtain a sustainability rating.

[0032] As a further solution of the present invention, the fuzzy comprehensive evaluation method is according to the formula:

[0033]

[0034] Calculate the comprehensive score result S, where W1, W2, W3 are the weight coefficients of energy efficiency, environmental impact and economic performance, and S1, S2, S3 are the associated standardized index values. It is the product of the standardized index of energy efficiency and environmental impact divided by 1 + the standardized index of economic performance.

[0035] Compared with the prior art, the advantages and positive effects of the present invention are:

[0036] In the present invention, the collection of boiler operation data realizes comprehensive monitoring of fuel input, steam output and heat loss, and provides accurate evaluation of thermal energy conversion efficiency and combustion efficiency. The refined data analysis method can clearly reveal the energy efficiency problems existing in the actual operation of the boiler, which is helpful to optimize energy utilization. In addition, through the systematic statistics of pollutant emissions, a comprehensive environmental impact model can be established to provide specific guidance for improving the environmental performance of the boiler. At the same time, in-depth economic performance analysis makes the control of fuel and maintenance costs more scientific and effectively improves the energy saving effect. Finding the best balance between energy efficiency, environmental impact and economic performance through comprehensive evaluation not only lays a solid foundation for the sustainable operation of the boiler, but also promotes a multi-dimensional management model, ensuring the dual improvement of operating efficiency and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a system flow chart of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] See also Figure 1 The present invention provides a technical solution: a control system for a boiler includes:

[0040] The operation data acquisition module collects the operation data based on the boiler's fuel input, steam output, heat loss, combustion temperature, excess air coefficient, furnace temperature and flue gas temperature parameters to obtain the boiler operation parameter set;

[0041] The energy efficiency analysis module compares the fuel input and steam output in the boiler operation parameter set, calculates the heat energy conversion efficiency, accumulates the heat loss, determines the total heat loss value, calculates the combustion efficiency based on the combustion temperature, excess air coefficient and furnace temperature, compares the heat energy conversion efficiency with the combustion efficiency, analyzes the energy utilization of the boiler, and determines the energy loss ratio in combination with the total heat loss value to obtain the energy efficiency evaluation result;

[0042] Environmental impact assessment module, based on the boiler operating parameter set, calculates the CO2, NO x and SO x Pollutant emissions: statistics on emissions, combined with flue gas temperature, establish an environmental impact model, and obtain pollutant emission assessment results;

[0043] The economic performance analysis module calculates the fuel cost, maintenance cost and operating cost based on the boiler operating parameter set, energy efficiency evaluation results and economizer efficiency, and analyzes the initial investment cost and life cycle cost in combination with the savings after energy efficiency improvement to obtain the economic performance evaluation results;

[0044] The comprehensive sustainability module standardizes the energy efficiency assessment results, pollutant emission assessment results and economic performance assessment results, sets weight coefficients for energy efficiency, environmental impact and economic performance, performs weighted calculations on the standardized data, summarizes the weighted calculation results and derives a sustainability rating.

[0045] The boiler operation parameter set includes fuel input, steam output, heat loss, combustion temperature, excess air coefficient, furnace temperature and flue gas temperature parameters. The energy efficiency evaluation results include thermal energy conversion efficiency, total heat loss value, combustion efficiency and energy utilization rate. The pollutant emission evaluation results include CO2, NO x and SO x The economic performance evaluation results include fuel cost, maintenance cost, operating cost and life cycle cost.

[0046] In this embodiment, the operation data acquisition module includes:

[0047] The fuel data acquisition submodule uses sensors to monitor the fuel inflow rate and steam output rate in real time based on the fuel input and steam output parameters of the boiler, continuously samples the fuel input and steam output, adds time stamps to the sampled data, and stores them in the data record to obtain the fuel steam data set;

[0048] The temperature data acquisition submodule uses a temperature sensor and a gas analyzer to measure the temperature and oxygen content in the furnace based on the fuel steam data set, organizes the collected data, records the excess air coefficient, and obtains the temperature parameter data set;

[0049] The parameter integration submodule, based on the fuel steam data set and the temperature parameter data set, performs time synchronization processing on the two sets of data, matches the parameter values ​​at the corresponding time, checks the data integrity, processes missing or abnormal data, integrates them into a unified data set, and obtains the boiler operation parameter set.

[0050] The fuel data acquisition submodule records the fuel inflow rate and steam output rate through real-time monitoring sensors, adopts continuous sampling technology to generate time-stamped data, and stores it in the data logger. Data processing is performed based on the boiler's fuel input and steam output parameters. A fuel steam data set is thus formed. The data set is continuously updated to reflect the dynamic changes of fuel and steam in real time. The recording accuracy is high, ensuring the authenticity and timeliness of the data. Through data integration, comprehensive monitoring of the boiler's operating status can be achieved, providing accurate basic data for subsequent data analysis and optimization.

[0051] In the above content, the temperature data acquisition submodule measures the temperature and oxygen content in the furnace through the temperature sensor and gas analyzer. According to the formula Calculate the excess air factor.

[0052] Where V t Represents the temperature measurement value, V o Represents the oxygen content measurement value, and R represents the excess air ratio.

[0053] Detailed explanation of the formula and the process of formula calculation and derivation:

[0054] Assume that the actual measured temperature in the furnace is 1200℃(V t ) and oxygen content of 5% (V o ), according to the formula, the excess air coefficient R is:

[0055]

[0056] This calculation indicates that there is an extremely high amount of excess air in the furnace, which indicates a problem of inefficient combustion or insufficient combustion of the fuel, and adjustments need to be made to optimize the combustion process.

[0057] The parameter integration submodule performs time synchronization processing based on the fuel steam data set and the temperature parameter data set, matches the two sets of data, ensures the accuracy of the parameter values ​​at the corresponding time, checks data integrity, processes missing or abnormal data, and integrates them to form a unified data set. The boiler operation parameter set is thus obtained. This data set integrates key operating parameters and provides strong data support for the system's performance evaluation and fault prediction. Through efficient data processing and integration technology, the integrity and accuracy of the data are ensured, providing a data basis for the safe operation and efficiency improvement of the boiler.

[0058] In this embodiment, the energy efficiency analysis module includes:

[0059] The thermal energy efficiency calculation submodule extracts the relevant data based on the fuel input and steam output in the boiler operation parameter set, calculates the fuel consumption and steam output per unit time, calculates the ratio of fuel consumption to steam output, and obtains the thermal energy conversion efficiency value;

[0060] The combustion efficiency evaluation submodule extracts relevant data based on the combustion temperature, excess air coefficient and furnace temperature in the boiler operation parameter set, calculates the difference between the current combustion temperature and the theoretical combustion temperature, analyzes the impact of excess air on the combustion process, calculates the combustion efficiency, compares the combustion efficiency with the heat energy conversion efficiency value, and obtains the combustion efficiency difference value;

[0061] The energy loss analysis submodule accumulates the heat loss in the boiler operating parameter set, calculates the total heat loss value, combines the combustion efficiency difference value, determines the energy utilization of the boiler, calculates the energy loss ratio, and obtains the energy efficiency evaluation result.

[0062] In the above content, the thermal energy efficiency calculation submodule extracts the associated data of fuel input and steam output according to the formula Calculate the thermal energy conversion efficiency value.

[0063] Where M steam Represents the steam output per unit time, M fuel represents the fuel consumption per unit time, and E represents the thermal energy conversion efficiency.

[0064] Detailed explanation of the formula and the process of formula calculation and derivation:

[0065] For example, in a certain period of time, the steam output M steam is 500kg / h, fuel consumption M fuel The heat conversion efficiency E is calculated as follows:

[0066]

[0067] This result shows that for every kg of fuel consumed, 10 kg of steam is produced, and the thermal energy conversion efficiency is high, indicating that the boiler has excellent thermal efficiency.

[0068] The combustion efficiency evaluation submodule uses the data from the boiler operating parameter set to calculate the difference between the combustion temperature and the theoretical combustion temperature, analyze the influence of the excess air coefficient during the combustion process, extract related data, and comprehensively evaluate the boiler's combustion efficiency difference value by comparing the combustion efficiency and thermal energy conversion efficiency values. This process involves data collection, parameter comparison, and efficiency calculation to ensure the accuracy of the evaluation results and provide reliable data support for further optimizing the combustion efficiency. This method can intuitively see the effectiveness of the boiler operation and possible problems, thereby adjusting the operating parameters in a targeted manner to improve the combustion efficiency.

[0069] The energy loss analysis submodule accumulates the heating loss through the boiler operating parameter set and calculates the total heat loss value. This data is combined with the combustion efficiency difference value to determine the energy utilization of the boiler and calculate the energy loss ratio. The energy efficiency evaluation result obtained reveals the overall energy efficiency status of the boiler. Through this analysis, the main causes of energy efficiency loss can be identified, providing a basis for the formulation of energy efficiency improvement measures, further promoting energy conservation and cost control, optimizing energy management strategies, and improving the energy efficiency of enterprises.

[0070] In this embodiment, the environmental impact assessment module includes:

[0071] The pollutant calculation submodule extracts the operating data under each condition based on the boiler operating parameter set and calculates the corresponding CO2, NO x and SO x Emissions, the calculation results are collated to obtain the pollutant emission data set;

[0072] The emission statistics submodule performs statistical analysis on the pollutant emission data set, summarizes the pollutant emissions under each operating condition, draws emission trend graphs, and obtains emission statistics results;

[0073] The environmental modeling submodule establishes an environmental impact model based on emission statistics and flue gas temperature, simulates the diffusion of pollutants under each condition, determines the degree of impact on the environment, and obtains pollutant emission assessment results.

[0074] In the above content, the pollutant calculation submodule calculates CO2, NO x and SO x Emissions, according to the formula P = E f ×Q, calculate pollutant emissions.

[0075] In the formula, E f represents the emission factor per unit of fuel, Q represents fuel consumption, and P represents total pollutant emissions.

[0076] Detailed explanation of the formula and the process of formula calculation and derivation:

[0077] For example, the emission factor E for CO2 f The fuel consumption is 2.3 kg / kg, the fuel consumption Q is 1000 kg, and the CO2 emission P is calculated according to the formula:

[0078] P = 2.3 × 1000 = 2300 kg

[0079] The calculation results show that under this operating condition, the boiler emits 2300kg of CO2, which helps to evaluate the effectiveness of environmental protection measures and further derive the pollutant emissions of the boiler under different operating conditions.

[0080] The emission statistics submodule performs statistical analysis on the pollutant emission data set, summarizes the pollutant emissions under each operating condition, and draws an emission trend chart. This process involves data collation and analysis. The production of charts is used to intuitively display the emission trend of pollutants, providing a basis for policy formulation and adjustment of environmental protection measures. The analysis results can help identify high-emission operating conditions and promote the optimization of operating parameters, thereby achieving the goal of reducing environmental pollution.

[0081] The environmental modeling submodule uses emission statistics and flue gas temperature data to establish an environmental impact model to simulate the diffusion of pollutants under each condition. This process analyzes the impact of various environmental factors on pollutant diffusion through modeling, determines the degree of impact on the environment, and provides pollutant emission assessment results. The model can show the specific impact of different emissions and flue gas temperatures on the surrounding environment, provide a scientific basis for environmental management departments to formulate emission reduction strategies, and help evaluate the contribution of different control technologies to environmental protection.

[0082] In this embodiment, the economic performance analysis module includes:

[0083] The cost calculation submodule extracts the fuel consumption and equipment operation time data according to the boiler operation parameter set and combined with the economizer efficiency, calculates the fuel cost, and counts the maintenance and operation related expenses to obtain the cost data set;

[0084] The benefit analysis submodule combines the energy efficiency evaluation results, calculates the savings brought by energy efficiency improvement, analyzes the economic benefits of energy-saving improvement measures, and obtains the benefit data set;

[0085] The economic evaluation submodule compares the initial investment cost with the total cost during the life cycle based on the cost data set and the benefit data set, calculates the payback period and the net present value, and obtains the economic performance evaluation results.

[0086] In the above content, the cost calculation submodule extracts fuel consumption and equipment operation time data according to the boiler operation parameter set, and calculates the cost according to the formula C = P f ×Q+M, calculate fuel cost and maintenance and operating expenses.

[0087] In the formula, C represents the total cost, P f represents the price per unit of fuel, Q represents the fuel consumption, and M represents the maintenance and operating expenses.

[0088] Detailed explanation of the formula and the process of formula calculation and derivation:

[0089] Set the price P per unit of fuel f The fuel cost is 0.5 yuan / kg, the fuel consumption Q is 1000kg, the maintenance and operation cost M is 200 yuan, and the total cost C is calculated as:

[0090] C = 0.5 × 1000 + 200 = 700 yuan

[0091] This result shows that the total cost is 700 yuan, which reflects the economy of boiler operation and provides basic data for subsequent profit analysis and economic evaluation.

[0092] The benefit analysis submodule combines the energy efficiency evaluation results, calculates the savings brought by energy efficiency improvement, and analyzes the economic benefits of energy-saving improvement measures. This process compares the energy consumption before and after the implementation of energy-saving improvements, evaluates the specific savings amount, and combines the energy efficiency improvement data to form a benefit data set. This data set helps to analyze the effectiveness of different energy-saving measures, provide a basis for optimizing resource allocation, and guide future investment decisions to ensure the sustainability of energy use.

[0093] The economic evaluation submodule compares the initial investment cost with the total cost during the life cycle based on the cost data set and the benefit data set, and calculates the payback period and net present value. This process evaluates the feasibility and profitability of the investment project by statistically analyzing various economic indicators, further clarifies the risk level of the project, provides a scientific basis for decision-making, ensures the effective use and return of funds, and supports the management's reasonable planning and risk control in future investments.

[0094] In this embodiment, the comprehensive sustainability module includes:

[0095] The data standardization submodule extracts data from the energy efficiency evaluation results, pollutant emission evaluation results, and economic performance evaluation results, and uses a unified scale to convert each indicator into a standardized value to obtain a standardized data set;

[0096] The weighted calculation submodule sets the weight coefficients of energy efficiency, environmental impact and economic performance, uses the fuzzy comprehensive evaluation method to perform weighted calculation on each indicator in the standardized data set, and accumulates the weighted values ​​to obtain a sustainability rating.

[0097] In the above content, the data standardization submodule extracts data from the energy efficiency evaluation results, pollutant emission evaluation results and economic performance evaluation results, and uses the formula Calculates normalized values.

[0098] In the formula, S i represents the standardized value, X i is the index to be standardized, X min and X max are the minimum and maximum values ​​of the indicator respectively.

[0099] Detailed explanation of the formula and the process of formula calculation and derivation:

[0100] Set energy efficiency assessment result X i =80, the minimum value of the pollutant emission assessment result is X min =50, the maximum value is X max =100, calculate the standardized value S i for:

[0101]

[0102] This result shows that after standardization, the value of this indicator is 0.6, reflecting its relative position in the overall data set.

[0103] The weighted calculation submodule sets the weight coefficients of energy efficiency, environmental impact and economic performance, and performs weighted calculation on each indicator in the standardized data set through the fuzzy comprehensive evaluation method. This process first evaluates each indicator, combines the standardized values ​​of each indicator, forms a weight matrix, and then multiplies the standardized values ​​of each indicator with the corresponding weight and accumulates them, finally obtaining a comprehensive sustainability rating, which provides overall evaluation information for different aspects and helps future decision-making and optimization.

[0104] In this embodiment, the fuzzy comprehensive evaluation method is based on the formula:

[0105]

[0106] Calculate the comprehensive score result S, where W1, W2, W3 are the weight coefficients of energy efficiency, environmental impact and economic performance, and S1, S2, S3 are the associated standardized index values. It is the product of the standardized index of energy efficiency and environmental impact divided by 1 + the standardized index of economic performance.

[0107] First, take the square root of the energy efficiency standardization index S1 and multiply it by the weight coefficient W1 to get the weighted value of the first part. Then, calculate W2S2 and W3S3 to get the weighted values ​​of the second and third parts. Next, calculate the product of S1S2 and divide it by 1+S3 to get the value of the fourth part. Finally, add the values ​​of the above four parts to get the comprehensive score result S.

[0108] Parameter acquisition and calculation process:

[0109] Energy efficiency standardization indicator S1:

[0110] The measured energy efficiency is E eff =85%.

[0111] The energy efficiency range is E min =70%, E max =95%.

[0112] calculate:

[0113]

[0114] Environmental impact standardization indicator S2:

[0115] The measured pollutant emissions (taking CO2 as an example) are E current =200kg / MWh.

[0116] The emission range is E min =100kg / MWh (best case), E max =300kg / MWh (worst case).

[0117] Since lower emissions are better, calculate:

[0118]

[0119] Economic performance standardization index S3:

[0120] The measured economic performance index (net profit margin) is P eff =20%.

[0121] The economic performance range is P min =10%, P max =30%.

[0122] calculate:

[0123]

[0124] Determination of weight coefficient:

[0125] According to actual needs, set the weight coefficient:

[0126] W1=0.4, W2=0.3, W3=0.3.

[0127] The sum of the weight coefficients is W1+W2+W3=1.0.

[0128] Calculate the comprehensive score S:

[0129] calculate

[0130]

[0131] calculate

[0132]

[0133] Calculate W2S2:

[0134] W2S2=0.3×0.5=0.15

[0135] Calculate W3S3:

[0136] W3S3=0.3×0.5=0.15

[0137] calculate

[0138]

[0139] Calculate the comprehensive score S:

[0140]

[0141] The comprehensive score result is S=0.8098, which means that the comprehensive sustainability score of the boiler is 0.8098.

Claims

1. A control system for a boiler, characterized in that: The system comprises: The operation data acquisition module collects the operation data based on the boiler's fuel input, steam output, heat loss, combustion temperature, excess air coefficient, furnace temperature and flue gas temperature parameters to obtain the boiler operation parameter set; The energy efficiency analysis module compares the fuel input and steam output in the boiler operation parameter set, calculates the heat energy conversion efficiency, accumulates the heat loss, determines the total heat loss value, calculates the combustion efficiency according to the combustion temperature, excess air coefficient and furnace temperature, compares the heat energy conversion efficiency with the combustion efficiency, analyzes the energy utilization of the boiler, determines the energy loss ratio in combination with the total heat loss value, and obtains the energy efficiency evaluation result; The environmental impact assessment module calculates the CO2, NO x and SO x Pollutant emissions: statistics on emissions, combined with flue gas temperature, establish an environmental impact model, and obtain pollutant emission assessment results; An economic performance analysis module calculates fuel cost, maintenance cost and operating cost according to the boiler operating parameter set, energy efficiency evaluation results and economizer efficiency, analyzes initial investment cost and life cycle cost in combination with the savings after energy efficiency improvement, and obtains economic performance evaluation results; The comprehensive sustainability module standardizes the energy efficiency assessment results, pollutant emission assessment results and economic performance assessment results, sets weight coefficients for energy efficiency, environmental impact and economic performance, performs weighted calculations on the standardized data, summarizes the weighted calculation results and derives a sustainability rating.

2. The control system for a boiler according to claim 1, characterized in that: The boiler operation parameter set includes fuel input, steam output, heat loss, combustion temperature, excess air coefficient, furnace temperature and flue gas temperature parameters; the energy efficiency evaluation results include thermal energy conversion efficiency, total heat loss value, combustion efficiency and energy utilization rate; the pollutant emission evaluation results include CO2, NO x and SO x The economic performance evaluation results include fuel cost, maintenance cost, operating cost and life cycle cost.

3. The control system for a boiler according to claim 1, characterized in that: The operation data acquisition module comprises: The fuel data acquisition submodule uses sensors to monitor the fuel inflow rate and steam output rate in real time based on the fuel input and steam output parameters of the boiler, continuously samples the fuel input and steam output, adds time stamps to the sampled data, and stores them in the data record to obtain the fuel steam data set; The temperature data acquisition submodule uses a temperature sensor and a gas analyzer to measure the temperature and oxygen content in the furnace based on the fuel steam data set, organizes the collected data, records the excess air coefficient, and obtains a temperature parameter data set; The parameter integration submodule, based on the fuel steam data set and the temperature parameter data set, performs time synchronization processing on the two sets of data, matches the parameter values ​​at the corresponding time, checks the data integrity, processes missing or abnormal data, integrates them into a unified data set, and obtains the boiler operation parameter set.

4. The control system for a boiler according to claim 1, characterized in that: The energy efficiency analysis module comprises: The thermal energy efficiency calculation submodule extracts related data based on the fuel input and steam output in the boiler operation parameter set, calculates the fuel consumption and steam output per unit time, calculates the ratio of fuel consumption to steam output, and obtains the thermal energy conversion efficiency value; The combustion efficiency evaluation submodule extracts related data based on the combustion temperature, excess air coefficient and furnace temperature in the boiler operation parameter set, calculates the difference between the current combustion temperature and the theoretical combustion temperature, analyzes the influence of excess air on the combustion process, calculates the combustion efficiency, compares the combustion efficiency with the heat energy conversion efficiency value, and obtains the combustion efficiency difference value; The energy loss analysis submodule accumulates the heat loss in the boiler operating parameter set, calculates the total heat loss value, combines the combustion efficiency difference value, determines the energy utilization of the boiler, calculates the energy loss ratio, and obtains the energy efficiency evaluation result.

5. The control system for a boiler according to claim 1, characterized in that: The environmental impact assessment module includes: The pollutant calculation submodule extracts the operating data under each condition based on the boiler operating parameter set and calculates the corresponding CO2, NO x and SO x Emissions, the calculation results are collated to obtain the pollutant emission data set; The emission statistics submodule performs statistical analysis on the pollutant emission data set, summarizes the pollutant emissions under each operating condition, draws an emission trend chart, and obtains emission statistics results; The environmental modeling submodule establishes an environmental impact model based on the emission statistics and the flue gas temperature, simulates the pollutant diffusion under each condition, determines the degree of impact on the environment, and obtains the pollutant emission assessment result.

6. The control system for a boiler according to claim 1, characterized in that: The economic performance analysis module includes: The cost calculation submodule extracts fuel consumption and equipment operation time data according to the boiler operation parameter set and combined with the economizer efficiency, calculates the fuel cost, and calculates the maintenance and operation related expenses to obtain a cost data set; The benefit analysis submodule combines the energy efficiency evaluation results, calculates the savings brought by the energy efficiency improvement, analyzes the economic benefits of the energy-saving improvement measures, and obtains a benefit data set; The economic evaluation submodule compares the initial investment cost with the total cost during the life cycle based on the cost data set and the benefit data set, calculates the investment payback period and the net present value, and obtains the economic performance evaluation result.

7. The control system for a boiler according to claim 1, characterized in that: The integrated sustainability module includes: The data standardization submodule extracts data from the energy efficiency evaluation results, pollutant emission evaluation results, and economic performance evaluation results, and converts each indicator into a standardized value using a unified scale to obtain a standardized data set; The weighted calculation submodule sets weight coefficients for energy efficiency, environmental impact and economic performance, uses a fuzzy comprehensive evaluation method to perform weighted calculation on each indicator in the standardized data set, and accumulates the weighted values ​​to obtain a sustainability rating.

8. The control system for a boiler according to claim 7, characterized in that: The fuzzy comprehensive evaluation method is based on the formula: Calculate the comprehensive score result S, where W1, W2, W3 are the weight coefficients of energy efficiency, environmental impact and economic performance, and S1, S2, S3 are the associated standardized index values. It is the product of the standardized index of energy efficiency and environmental impact divided by 1 + the standardized index of economic performance.

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