Coal-fired power plant scr denitration system limited load output and peak capacity evaluation method and device, computing device and storage medium

Abstract

The application provides a coal-fired power plant SCR denitration system limited load output and peak capacity evaluation method and device, computing equipment and storage medium, relates to the coal-fired thermal power generating unit technical field. The method is based on online monitoring parameters and equipment design parameters, and the total amount of real-time removal of NO x X is calculated; combined with the key constraints including catalyst activity, ammonia supply capacity and reaction temperature, the operation status of the SCR denitration system is evaluated; the removal of NO x X of the three core constraints of catalyst activity, ammonia supply and reaction temperature is quantified respectively, and the total NO x X removal margin is obtained; based on the coupling relationship between the total NO x X removal margin and the load, the unit load margin and the peak capacity are calculated, the technical blank of denitration system performance evaluation under high load conditions is filled, and support is provided for safe and economic operation of the unit.

Description

Technical Field

[0001] This application relates to the field of coal-fired power unit technology, and in particular to a method, apparatus, computing device and storage medium for evaluating the load-limited output and peak capacity of an SCR denitrification system in a coal-fired power plant. Background Technology

[0002] Under the dual constraints of carbon emission targets and ultra-low emissions from thermal power units, coal-fired power units must simultaneously meet the requirements of peak-shaving flexibility and NOx emission reduction. x (Nitrogen oxides) emissions must meet standards. SCR (Selective Catalytic Reduction) denitrification technology has become the mainstream denitrification configuration for coal-fired power plants due to its high removal efficiency (design value ≥90%) and strong adaptability. However, this technology has significant operational bottlenecks under high load conditions: when the unit is operating at full or excessive capacity, the combined effects of a sudden increase in flue gas flow, reaction temperature fluctuations (exceeding the catalyst's optimal window by 300-400℃), catalyst activity decay (high-temperature aging, ash accumulation and blockage), and delayed ammonia supply response can easily lead to an imbalance in the ammonia-nitrogen molar ratio and incomplete catalytic reaction, resulting in high NOx emissions. x When the removal efficiency drops below 80%, NO is directly triggered. x Risk of exceeding emission standards.

[0003] To circumvent environmental penalties, power plants are forced to adopt passive measures such as restricting high-load operation, which not only reduces power generation efficiency but also weakens the grid's peak-shaving capacity. Existing technology has two major gaps: firstly, it lacks a quantitative assessment model for the output of denitrification systems under high-load conditions, making it impossible to predict NO levels in different load ranges. x The issues include: 1) the removal of critical values ​​and the load-bearing limits of the denitrification system; 2) operational adjustment strategies rely heavily on manual experience, and parameters such as ammonia injection rate and boiler combustion temperature control under high loads lack quantitative basis, making it difficult to balance NO₂ levels. x Emission compliance and unit output requirements. Therefore, it is urgent to establish a quantitative evaluation method for the load-limited output and peak capacity of SCR denitrification systems, fill the technical gap in the performance evaluation of denitrification systems under high-load conditions, and provide support for the safe and economical operation of units. Summary of the Invention

[0004] In view of the above problems, this application is made to provide a method, apparatus, computing device, and storage medium for evaluating the load-limited output and peak capacity of an SCR denitrification system in a coal-fired power plant, which overcomes or at least partially solves the above problems. The technical solution is as follows: Firstly, a method for evaluating the load-limited output and peak capacity of an SCR denitrification system in a coal-fired power plant is provided, the method comprising: Based on online monitoring parameters and equipment design parameters, the real-time NO removal efficiency is calculated. x The total amount; The current operating status of the SCR denitrification system is evaluated by considering key constraints including catalyst activity, ammonia supply capacity, and reaction temperature. Quantifying the three core constraints of catalyst activity, ammonia supply, and reaction temperature for NO removal x The margin, summed up, yields the NO removal. x Total margin; Based on NO removal x The coupling relationship between total margin and load, and the load margin and peak capacity of computer groups.

[0005] In one possible implementation, the SCR denitrification system is set up with two denitrification reactors, labeled A and B; The following formula is used to calculate the real-time NO removal efficiency based on online monitoring parameters and equipment design parameters. x The total amount includes: (1) (2) (3) in, , These are the current NO removal processes in the A and B side denitrification reactors. x The total amount, in kg / h; The current NO removal process in the dual denitrification reactor is... x The total amount, in kg / h; , These are the flue gas flow rates at the denitrification inlets on sides A and B of the standard pipeline, in m³ / s. 3 / h represents the online monitoring parameter; , These are the NO inlets on sides A and B of the standard dry line. x Concentration, in mg / m³ 3 These are parameters for online monitoring. , These are the NO from the denitrification outlets on sides A and B of the standard dry line. x Concentration, in mg / m³ 3 , which are parameters for online monitoring.

[0006] In one possible implementation, the current operating status of the SCR denitrification system is evaluated by considering key constraints including catalyst activity, ammonia supply capacity, and reaction temperature, including: The catalytic activity of the catalysts in the denitrification reactors on sides A and B is calculated and evaluated separately for sides A and B according to the following formula, due to differences in the operating environment: (4) (5) (6) (7) (8) (9) in, , These are the actual denitrification efficiencies of sides A and B, respectively, and are dimensionless. , These are the catalyst activity coefficients on sides A and B, respectively, and are dimensionless. It is the design denitrification efficiency, dimensionless; , These are the temperature correction coefficients for sides A and B, respectively, and are dimensionless. , These are the inlet flue gas temperatures of the SCR reactors on sides A and B, respectively, in °C, and are online monitoring parameters; , These are the minimum and maximum allowable reaction temperatures for the catalyst, respectively, in °C, and are equipment design parameters. , These are the lower and upper limits of the optimal reaction temperature for the catalyst, respectively, in °C, and are equipment design parameters; The ammonia supply systems on sides B and B are configured independently. The effective ammonia supply is calculated separately for sides A and B. Since different systems use different types of denitrification reducing agents, the calculations here are all based on NH3 conversion. (10) (11) , These represent the effective ammonia supply rates on sides A and B, respectively, in kg / h. , These are the actual ammonia supply rates on sides A and B, respectively, in kg / h. It refers to the purity of ammonia; , These are the uniformity coefficients of ammonia / nitrogen mixing on sides A and B, respectively, and are dimensionless.

[0007] In one possible implementation, the removal of NO is achieved by quantifying the three core constraints: catalyst activity, ammonia supply, and reaction temperature.x The margin, summed up, yields the NO removal. x Total margin, including: 1) Catalyst activity on sides A and B for NO removal x The margin is: (12) (13) in, , These are the A and B side denitrification catalysts for NO removal. x Margin, in kg / h; if the calculation result is negative, take 0. 2) Ammonia supply and NO removal on sides A and B x The margin is: (14) (15) (16) (17) in, , These represent the maximum effective ammonia supply capacity of the ammonia supply systems on sides A and B, respectively, in kg / h. , These are the rated flow rates of the ammonia supply pumps on sides A and B, respectively, in m³ / h. , These are the ammonia supply and NO removal on sides A and B, respectively. x Margin, in kg / h; if the calculation result is negative, take 0. For the design of the ammonia-nitrogen ratio, dimensionless; 3) NO removal system x The total margin is: (18) in, It is a denitrification system that removes NO x Total margin, in kg / h.

[0008] In one possible implementation, based on removing NO x The coupling relationship between total capacity and load, and the load capacity and peak capacity of computer groups, including: (19) (20) (twenty one) in, It is a double-sided entrance NO. x Average concentration; Is it unit NO? x Emission control concentration for compliance, unit is mg / m³ 3 ; This is the unit load margin, measured in MW; This is the current unit load, in MW, and is an online monitoring parameter; It is the peak capacity of the generating unit, measured in MW; It is the unit capacity, in MW, and is a design parameter of the equipment; when = This indicates that the current denitrification system is operating at full load and can generate electricity; when < This indicates that the current denitrification system is operating under conditions that limit full-load power generation; the maximum load limit at this time is [value missing]. .

[0009] In one possible implementation, after considering the computer group load margin and peak capacity, the method further includes: Determine whether the denitrification system is limited to full-load operation; If it is determined that the denitrification system is limited to full-load operation, provide quantitative operational adjustment suggestions to achieve NO reduction. x Dynamic balance between emission standards and unit output.

[0010] In one possible implementation, if it is determined that the denitrification system is limited to full-load operation, quantitative operational adjustment suggestions are provided to achieve NO x The dynamic balance between emission standards and unit output includes: When there are load limitations in flue gas denitrification, to achieve full-load operation of the unit, suggestions are provided to reduce NO at the denitrification inlet by burning low-N coal or adjusting the combustion process. x The concentration is adjusted to achieve full-load emission standards; the maximum NO concentration at the denitrification inlet of the unit at full load is [not specified]. x Concentration value for: (twenty two) in, The unit is mg / m³ 3 .

[0011] Secondly, a device for evaluating the load-limited output and peak capacity of an SCR denitrification system in a coal-fired power plant is provided, the device comprising: The calculation unit is used to calculate the real-time NO removal based on online monitoring parameters and equipment design parameters. x The total amount; The evaluation unit is used to assess the current operating status of the SCR denitrification system by taking into account key constraints including catalyst activity, ammonia supply capacity, and reaction temperature. The quantitative summary unit is used to quantify the NO removal efficiency based on the three core constraints of catalyst activity, ammonia supply, and reaction temperature. x The margin, summed up, yields the NO removal. x Total margin; Calculation unit, used for NO removal x The coupling relationship between total margin and load, and the load margin and peak capacity of computer groups.

[0012] Thirdly, a computing device is provided, the electronic device including a processor and a memory, wherein the memory stores a computer program, and the processor is configured to run the computer program to perform the load limiting output and peak capacity assessment method of the SCR denitrification system of a coal-fired power plant as described in any of the preceding claims.

[0013] Fourthly, a storage medium is provided, the storage medium storing a computer program, wherein the computer program is configured to execute, at runtime, the load limiting output and peak capacity assessment method of the SCR denitrification system of a coal-fired power plant as described in any of the preceding claims.

[0014] Using the above technical solutions, this application provides a method, apparatus, computing equipment, and storage medium for assessing the load-limited output and peak capacity of an SCR denitrification system in a coal-fired power plant. This method for assessing the load-limited output and peak capacity of an SCR denitrification system in a coal-fired power plant is based on online monitoring parameters and equipment design parameters, and calculates the real-time NO removal capacity. x The total amount; combined with key constraints including catalyst activity, ammonia supply capacity, and reaction temperature, the current operating status of the SCR denitrification system is evaluated; the removal of NO under the three core constraints of catalyst activity, ammonia supply, and reaction temperature is quantified respectively. x The margin, summed up, yields the NO removal. x Total margin; based on NO removal x The coupling relationship between total margin and load, the load margin and peak capacity of the computer unit, fill the technical gap in the performance evaluation of denitrification system under high load conditions, and provide support for the safe and economical operation of the unit. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below.

[0016] Figure 1A flowchart is shown below illustrating the method for evaluating the load-limited output and peak capacity of an SCR denitrification system in a coal-fired power plant, as provided in an embodiment of this application. Figure 2 The diagram shows the structure of the load limiting output and peak capacity assessment device for the SCR denitrification system of a coal-fired power plant provided in the embodiments of this application. Detailed Implementation

[0017] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the term "comprising" and its variations should be interpreted as open-ended terms meaning "including but not limited to."

[0019] To address the aforementioned technical problems, this application provides a method for evaluating the load-limited output and peak capacity of an SCR denitrification system in a coal-fired power plant, such as... Figure 1 As shown, the method for assessing the load-limited output and peak capacity of the SCR denitrification system in this coal-fired power plant may include the following steps S101 to S104: Step S101: Based on online monitoring parameters and equipment design parameters, calculate the real-time NO removal efficiency. x The total amount; Step S102: Evaluate the current operating status of the SCR denitrification system in light of key constraints including catalyst activity, ammonia supply capacity, and reaction temperature. Step S103 quantifies the three core constraints of NO removal: catalyst activity, ammonia supply, and reaction temperature. x The margin, summed up, yields the NO removal. x Total margin; Step S104, based on NO removal x The coupling relationship between total margin and load, and the load margin and peak capacity of computer groups.

[0020] This embodiment focuses on the bottleneck of high-load operation of the SCR denitrification system. First, based on online monitoring parameters and equipment design parameters, it accurately calculates the real-time NO removal. xThe total amount of NO removal is assessed; considering key constraints including catalyst activity, ammonia supply capacity, and reaction temperature, the current operating status of the SCR denitrification system is evaluated; secondly, the NO removal efficiency under the three core constraints of catalyst activity, ammonia supply, and reaction temperature is quantified. x The margin, summed up, yields the NO removal. x Total margin; finally, based on NO removal x The coupling relationship between total margin and load, the load margin and peak capacity of the computer unit, fill the technical gap in the performance evaluation of denitrification system under high load conditions, and provide support for the safe and economical operation of the unit.

[0021] This application provides a possible implementation method in which the SCR denitrification system is set up with dual denitrification reactors, identified by A and B; The following formula is used to calculate the real-time NO removal efficiency based on online monitoring parameters and equipment design parameters. x The total amount includes: (1) (2) (3) in, , These are the current NO removal processes in the A and B side denitrification reactors. x The total amount, in kg / h; The current NO removal process in the dual denitrification reactor is... x The total amount, in kg / h; , These are the flue gas flow rates at the denitrification inlets on sides A and B of the standard pipeline, in m³ / s. 3 / h represents the online monitoring parameter; , These are the NO inlets on sides A and B of the standard dry line. x Concentration, in mg / m³ 3 These are parameters for online monitoring. , These are the NO from the denitrification outlets on sides A and B of the standard dry line. x Concentration, in mg / m³ 3 , which are parameters for online monitoring.

[0022] This application provides a possible implementation method. Step S102, in conjunction with key constraints including catalyst activity, ammonia supply capacity, and reaction temperature, evaluates the current operating status of the SCR denitrification system, including: The catalytic activity of the catalysts in the denitrification reactors on sides A and B is calculated and evaluated separately for sides A and B according to the following formula, due to differences in the operating environment (such as temperature, ash accumulation, aging, etc.): (4) (5) (6) (7) (8) (9) in, , These are the actual denitrification efficiencies of sides A and B, respectively, and are dimensionless. , These are the catalyst activity coefficients on sides A and B, respectively, and are dimensionless. It is the design denitrification efficiency, dimensionless; , These are the temperature correction coefficients for sides A and B, respectively, and are dimensionless. , These are the inlet flue gas temperatures of the SCR reactors on sides A and B, respectively, in °C, and are online monitoring parameters; , These are the minimum and maximum allowable reaction temperatures for the catalyst, respectively, in °C, and are equipment design parameters. , These are the lower and upper limits of the optimal reaction temperature for the catalyst, respectively, in °C, and are equipment design parameters; The ammonia supply systems on sides A and B are configured independently, and the effective ammonia supply is calculated separately for sides A and B. Since different systems use different types of denitrification reducing agents, the calculations here are all based on NH3 conversion: (10) (11) , These represent the effective ammonia supply rates on sides A and B, respectively, in kg / h. , These are the actual ammonia supply rates on sides A and B, respectively, in kg / h. It refers to the purity of ammonia; , These are the uniformity coefficients of ammonia / nitrogen mixing on sides A and B, respectively, and are dimensionless.

[0023] This application provides a possible implementation method, in which step S103 quantifies the three core constraints of NO removal: catalyst activity, ammonia supply, and reaction temperature. x The margin, summed up, yields the NO removal. x Total margin, including: 1) Catalyst activity on sides A and B for NO removal x The margin is: (12) (13) in, , These are the A and B side denitrification catalysts for NO removal. x Margin, in kg / h; if the calculation result is negative, take 0. 2) Ammonia supply and NO removal on sides A and B x The margin is: (14) (15) (16) (17) in, , These represent the maximum effective ammonia supply capacity of the ammonia supply systems on sides A and B, respectively, in kg / h. , These are the rated flow rates of the ammonia supply pumps on sides A and B, respectively, in m³ / h. , These are the ammonia supply and NO removal on sides A and B, respectively. x Margin, in kg / h; if the calculation result is negative, take 0. For the design of the ammonia-nitrogen ratio, dimensionless; 3) NO removal system x The total margin is: (18) in, It is a denitrification system that removes NO x Total margin, in kg / h.

[0024] This application provides a possible implementation method for evaluating the current denitrification system's limited unit load output and peak capacity. Specifically, step S104 is based on NO removal... xThe coupling relationship between total capacity and load, and the load capacity and peak capacity of computer groups, including: (19) (20) (twenty one) in, It is a double-sided entrance NO. x Average concentration; Is it unit NO? x Emission control concentration for compliance, unit is mg / m³ 3 ; This is the unit load margin, measured in MW; This is the current unit load, in MW, and is an online monitoring parameter; It is the peak capacity of the generating unit, measured in MW; It is the unit capacity, in MW, and is a design parameter of the equipment; when = This indicates that the current denitrification system is operating at full load and can generate electricity; when < This indicates that the current denitrification system is operating under conditions that limit full-load power generation; the maximum load limit at this time is [value missing]. .

[0025] This application embodiment provides a possible implementation method. After step S104, which measures the computer group load margin and peak capacity, the method may further include the following steps a1 and a2: Step a1: Determine whether the denitrification system is limited to full-load operation; Step a2: If it is determined that the denitrification system is limited to full-load operation, provide quantitative operational adjustment suggestions to achieve NO reduction. x Dynamic balance between emission standards and unit output.

[0026] This application embodiment provides a possible implementation method: if step a2 determines that the denitrification system is limited to full-load operation, it provides quantitative operation adjustment suggestions to achieve NO... x The dynamic balance between emission standards and unit output can specifically be: When there are load limitations in flue gas denitrification, to achieve full-load operation of the unit, suggestions are provided to reduce NO at the denitrification inlet by burning low-N coal or adjusting the combustion process. x The concentration is adjusted to achieve full-load emission standards; the maximum NO concentration at the denitrification inlet of the unit at full load is [not specified]. x Concentration value for: (twenty two) in, The unit is mg / m³ 3 .

[0027] The above introduces Figure 1 The embodiments shown have various implementation methods for each step. The following will further explain the method for evaluating the load-limited output and peak capacity of the SCR denitrification system of a coal-fired power plant according to specific embodiments.

[0028] Taking a 1000MW coal-fired power unit as an example, the flue gas denitrification system of this unit contains two denitrification reactors, A and B. The operation data was collected and analyzed, and the calculation process is shown in Table 1 below.

[0029] Table 1 Calculation Example

[0030] This embodiment establishes a quantitative evaluation method for the load-limited output and peak capacity of the SCR denitrification system, filling the technical gap in the performance evaluation of the denitrification system under high load conditions and providing support for the safe and economical operation of the unit.

[0031] It should be noted that the sequence numbers of the steps in the above embodiments do not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. In practical applications, all the above possible implementation methods can be arbitrarily combined in a combined manner to form possible embodiments of this application, which will not be described in detail here.

[0032] Based on the methods for evaluating the limited load output and peak capacity of SCR denitrification systems in coal-fired power plants provided in the above embodiments, and based on the same inventive concept, this application also provides a device for evaluating the limited load output and peak capacity of SCR denitrification systems in coal-fired power plants.

[0033] Figure 2 This is a structural diagram of the load-limited output and peak capacity assessment device for the SCR denitrification system of a coal-fired power plant provided in the embodiments of this application. Figure 2 As shown, the load limiting output and peak capacity assessment device of the SCR denitrification system of the coal-fired power plant may specifically include a calculation unit 210, an assessment unit 220, a quantitative summary unit 230, and a calculation unit 240.

[0034] The calculation unit 210 is used to calculate the real-time NO removal based on online monitoring parameters and equipment design parameters. x The total amount; Evaluation unit 220 is used to evaluate the current operating status of the SCR denitrification system in conjunction with key constraints including catalyst activity, ammonia supply capacity, and reaction temperature. The quantification and summarization unit 230 is used to quantify the NO removal efficiency based on the three core constraints of catalyst activity, ammonia supply, and reaction temperature. x The margin, summed up, yields the NO removal. x Total margin; Calculation unit 240, used for NO removal x The coupling relationship between total margin and load, and the load margin and peak capacity of computer groups.

[0035] This application embodiment provides a possible implementation method, in which the SCR denitrification system is set up with dual denitrification reactors, identified by A and B; the calculation unit 210 calculates the real-time NO removal using the following formula, based on online monitoring parameters and equipment design parameters. x The total amount includes: (1) (2) (3) in, , These are the current NO removal processes in the A and B side denitrification reactors. x The total amount, in kg / h; The current NO removal process in the dual denitrification reactor is... x The total amount, in kg / h; , These are the flue gas flow rates at the denitrification inlets on sides A and B of the standard pipeline, in m³ / s. 3 / h represents the online monitoring parameter; , These are the NO inlets on sides A and B of the standard dry line. x Concentration, in mg / m³ 3 These are parameters for online monitoring. , These are the NO from the denitrification outlets on sides A and B of the standard dry line. x Concentration, in mg / m³ 3 , which are parameters for online monitoring.

[0036] This application embodiment provides a possible implementation, wherein the evaluation unit 220 is further configured to: Evaluate the current operating status of the SCR denitrification system, taking into account key constraints including catalyst activity, ammonia supply capacity, and reaction temperature, including: The catalytic activity of the catalysts in the denitrification reactors on sides A and B is calculated and evaluated separately for sides A and B according to the following formula, due to differences in the operating environment: (4) (5) (6) (7) (8) (9) in, , These are the actual denitrification efficiencies of sides A and B, respectively, and are dimensionless. , These are the catalyst activity coefficients on sides A and B, respectively, and are dimensionless. It is the design denitrification efficiency, dimensionless; , These are the temperature correction coefficients for sides A and B, respectively, and are dimensionless. , These are the inlet flue gas temperatures of the SCR reactors on sides A and B, respectively, in °C, and are online monitoring parameters; , These are the minimum and maximum allowable reaction temperatures for the catalyst, respectively, in °C, and are equipment design parameters. , These are the lower and upper limits of the optimal reaction temperature for the catalyst, respectively, in °C, and are equipment design parameters; The ammonia supply systems on sides A and B are configured independently, and the effective ammonia supply is calculated separately for sides A and B. Since different systems use different types of denitrification reducing agents, the calculations here are all based on NH3 conversion: (10) (11) , These represent the effective ammonia supply rates on sides A and B, respectively, in kg / h. , These are the actual ammonia supply rates on sides A and B, respectively, in kg / h. It refers to the purity of ammonia; , These are the uniformity coefficients of ammonia / nitrogen mixing on sides A and B, respectively, and are dimensionless.

[0037] This application embodiment provides a possible implementation, wherein the quantization and summarization unit 230 is further configured to: Quantifying the three core constraints of catalyst activity, ammonia supply, and reaction temperature for NO removal x The margin, summed up, yields the NO removal. x Total margin, including: 1) Catalyst activity on sides A and B for NO removal x The margin is: (12) (13) in, , These are the A and B side denitrification catalysts for NO removal. x Margin, in kg / h; if the calculation result is negative, take 0. 2) Ammonia supply and NO removal on sides A and B x The margin is: (14) (15) (16) (17) in, , These represent the maximum effective ammonia supply capacity of the ammonia supply systems on sides A and B, respectively, in kg / h. , These are the rated flow rates of the ammonia supply pumps on sides A and B, respectively, in m³ / h. , These are the ammonia supply and NO removal on sides A and B, respectively. x Margin, in kg / h; if the calculation result is negative, take 0. For the design of the ammonia-nitrogen ratio, dimensionless; 3) NO removal system x The total margin is: (18) in, It is a denitrification system that removes NO x Total margin, in kg / h.

[0038] This application embodiment provides a possible implementation, wherein the computing unit 240 is further configured to: Based on NO removal x The coupling relationship between total capacity and load, and the load capacity and peak capacity of computer groups, including: (19) (20) (twenty one) in, It is a double-sided entrance NO. x Average concentration; Is it unit NO? x Emission control concentration for compliance, unit is mg / m³ 3 ; This is the unit load margin, measured in MW; This is the current unit load, in MW, and is an online monitoring parameter; It is the peak capacity of the generating unit, measured in MW; It is the unit capacity, in MW, and is a design parameter of the equipment; when = This indicates that the current denitrification system is operating at full load and can generate electricity; when < This indicates that the current denitrification system is operating under conditions that limit full-load power generation; the maximum load limit at this time is [value missing]. .

[0039] This application embodiment provides a possible implementation, wherein the computing unit 240 is further configured to: After assessing the computer group's load margin and peak capacity, determine whether the denitrification system is limited to full-load operation; If it is determined that the denitrification system is limited to full-load operation, provide quantitative operational adjustment suggestions to achieve NO reduction. x Dynamic balance between emission standards and unit output.

[0040] This application embodiment provides a possible implementation, wherein the computing unit 240 is further configured to: If it is determined that the denitrification system is limited to full-load operation, provide quantitative operational adjustment suggestions to achieve NO reduction. x The dynamic balance between emission standards and unit output includes: When there are load limitations in flue gas denitrification, to achieve full-load operation of the unit, suggestions are provided to reduce NO at the denitrification inlet by burning low-N coal or adjusting the combustion process. x The concentration is adjusted to achieve full-load emission standards; the maximum NO concentration at the denitrification inlet of the unit at full load is [not specified].x Concentration value for: (twenty two) in, The unit is mg / m³ 3 .

[0041] Based on the same inventive concept, this application also provides a computing device, including a processor and a memory, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the method for evaluating the load-limited output and peak capacity of the SCR denitrification system of a coal-fired power plant according to any of the above embodiments.

[0042] Based on the same inventive concept, this application also provides a storage medium storing a computer program, wherein the computer program is configured to execute the method for evaluating the load-limited output and peak capacity of the SCR denitrification system of a coal-fired power plant according to any of the above embodiments.

[0043] Those skilled in the art will clearly understand that the specific working process of the systems, devices, and modules described above can be referred to the corresponding process in the foregoing method embodiments. For the sake of brevity, it will not be repeated here.

[0044] Those skilled in the art will understand that the technical solution of this application, or all or part of it, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several program instructions to cause an electronic device (e.g., a personal computer, server, or network device) to execute all or part of the steps of the methods described in the embodiments of this application when running the program instructions. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0045] Alternatively, all or part of the steps of the foregoing method embodiments can be implemented by hardware (such as electronic devices like personal computers, servers, or network devices) associated with program instructions. The program instructions can be stored in a computer-readable storage medium. When the program instructions are executed by the processor of the electronic device, the electronic device executes all or part of the steps of the methods described in the embodiments of this application.

[0046] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that within the spirit and principles of this application, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the corresponding technical solutions to leave the protection scope of this application.

Claims

1. A method for evaluating the load-limited output and peak capacity of an SCR denitrification system in a coal-fired power plant, characterized in that, The method includes: Based on online monitoring parameters and equipment design parameters, the real-time NO removal efficiency is calculated. x The total amount; The current operating status of the SCR denitrification system is evaluated by considering key constraints including catalyst activity, ammonia supply capacity, and reaction temperature. Quantifying the three core constraints of catalyst activity, ammonia supply, and reaction temperature for NO removal x The margin, summed up, yields the NO removal. x Total margin; Based on NO removal x The coupling relationship between total margin and load, and the load margin and peak capacity of computer groups.

2. The method according to claim 1, characterized in that, The SCR denitrification system is equipped with dual denitrification reactors, labeled A and B. The following formula is used to calculate the real-time NO removal efficiency based on online monitoring parameters and equipment design parameters. x The total amount includes: （1） （2） （3） in, , These are the current NO removal processes in the A and B side denitrification reactors. x The total amount, in kg / h; The current NO removal process in the dual denitrification reactor is... x The total amount, in kg / h; , These are the flue gas flow rates at the denitrification inlets on sides A and B of the standard pipeline, in m³ / s. 3 / h is the online monitoring parameter; , These are the NO inlets on sides A and B of the standard dry line. x Concentration, in mg / m³ 3 These are parameters for online monitoring. , These are the NO₂ outlets at the A and B sides of the standard dry line. x Concentration, in mg / m³ 3 , which are parameters for online monitoring.

3. The method according to claim 2, characterized in that, Evaluate the current operating status of the SCR denitrification system, taking into account key constraints including catalyst activity, ammonia supply capacity, and reaction temperature, including: The catalytic activity of the catalysts in the denitrification reactors on sides A and B is calculated and evaluated separately for sides A and B according to the following formula, due to differences in the operating environment: （4） （5） （6） （7） （8） （9） in, , These are the actual denitrification efficiencies of sides A and B, respectively, and are dimensionless. , These are the catalyst activity coefficients on sides A and B, respectively, and are dimensionless. It is the design denitrification efficiency, dimensionless; , These are the temperature correction coefficients for sides A and B, respectively, and are dimensionless. , These are the inlet flue gas temperatures of the SCR reactors on sides A and B, respectively, in °C, and are online monitoring parameters; , These are the minimum and maximum allowable reaction temperatures for the catalyst, respectively, in °C, and are equipment design parameters. , These are the lower and upper limits of the optimal reaction temperature for the catalyst, respectively, in °C, and are equipment design parameters; The ammonia supply systems on sides A and B are configured independently, and the effective ammonia supply is calculated separately for sides A and B. Since different systems use different types of denitrification reducing agents, the calculations here are all based on NH3 conversion: （10） （11） , These represent the effective ammonia supply rates on sides A and B, respectively, in kg / h. , These are the actual ammonia supply rates on sides A and B, respectively, in kg / h. It refers to the purity of ammonia; , These are the uniformity coefficients of ammonia / nitrogen mixing on sides A and B, respectively, and are dimensionless.

4. The method according to claim 3, characterized in that, Quantifying the three core constraints of catalyst activity, ammonia supply, and reaction temperature for NO removal x The margin, summed up, yields the NO removal. x Total margin, including: 1) Catalyst activity on sides A and B for NO removal x The margin is: （12） （13） in, , These are the A and B side denitrification catalysts for NO removal. x Margin, in kg / h; if the calculation result is negative, take 0. 2) Ammonia supply and NO removal on sides A and B x The margin is: （14） （15） （16） （17） in, , These represent the maximum effective ammonia supply capacity of the ammonia supply systems on sides A and B, respectively, in kg / h. , These are the rated flow rates of the ammonia supply pumps on sides A and B, respectively, in m³ / h. , These are the ammonia supply and NO removal on sides A and B, respectively. x Margin, in kg / h; if the calculation result is negative, take 0. For the design of the ammonia-nitrogen ratio, dimensionless; 3) NO removal system x The total margin is: （18） in, It is a denitrification system that removes NO x Total margin, in kg / h.

5. The method according to claim 4, characterized in that, Based on NO removal x The coupling relationship between total margin and load, computer group load margin and peak capacity. include: （19） （20） （21） in, It is a double-sided entrance NO. x Average concentration; Is it unit NO? x Emission control concentration for compliance, unit is mg / m³ 3 ; This is the unit load margin, measured in MW; This is the current unit load, in MW, and is an online monitoring parameter; It is the peak capacity of the generating unit, measured in MW; It is the unit capacity, in MW, and is a design parameter of the equipment; when = This indicates that the current denitrification system is operating at full load and can generate electricity; when < This indicates that the current denitrification system is operating under conditions that limit full-load power generation; the maximum load limit at this time is [value missing]. .

6. The method according to claim 5, characterized in that, After determining the computer group load margin and peak capacity, the method further includes: Determine whether the denitrification system is limited to full-load operation; If it is determined that the denitrification system is limited to full-load operation, provide quantitative operational adjustment suggestions to achieve NO reduction. x Dynamic balance between emission standards and unit output.

7. The method according to claim 6, characterized in that, If it is determined that the denitrification system is limited to full-load operation, provide quantitative operational adjustment suggestions to achieve NO reduction. x The dynamic balance between emission standards and unit output includes: When there are load limitations in flue gas denitrification, to achieve full-load operation of the unit, suggestions are provided to reduce NO at the denitrification inlet by burning low-N coal or adjusting the combustion process. x The concentration is adjusted to achieve full-load emission standards; the maximum NO concentration at the denitrification inlet of the unit at full load is [not specified]. x Concentration value for: （22） in, The unit is mg / m³ 3 .

8. A device for evaluating the load-limited output and peak capacity of an SCR denitrification system in a coal-fired power plant, characterized in that, The device includes: The calculation unit is used to calculate the real-time NO removal based on online monitoring parameters and equipment design parameters. x The total amount; The evaluation unit is used to assess the current operating status of the SCR denitrification system by taking into account key constraints including catalyst activity, ammonia supply capacity, and reaction temperature. The quantitative summary unit is used to quantify the NO removal efficiency based on the three core constraints of catalyst activity, ammonia supply, and reaction temperature. x The margin, summed up, yields the NO removal. x Total margin; Calculation unit, used for NO removal x The coupling relationship between total margin and load, and the load margin and peak capacity of computer groups.

9. A computing device, characterized in that, The system includes a processor and a memory, wherein the memory stores a computer program, and the processor is configured to run the computer program to perform the method for evaluating the load-limited output and peak capacity of the SCR denitrification system of a coal-fired power plant as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium stores a computer program, wherein the computer program is configured to execute, when running, the method for evaluating the load-limited output and peak capacity of the SCR denitrification system of a coal-fired power plant as described in any one of claims 1 to 7.

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