Boiler output calculation method, device, equipment, medium and program product

Abstract

The invention relates to the technical field of coal-fired unit load prediction, in particular to a boiler output calculation method, device, equipment, medium and program product.The method comprises the steps that first information of the coal type and the coal quantity of a coal-fired unit is obtained, and a first output value of a coal mill, a first output value of an induced draft fan and a first pressure head of the induced draft fan are calculated; based on the first output value of the coal mill, the first output value of the induced draft fan and the first pressure head of the induced draft fan, judging whether the load is a target load or not; if yes, the output value of the boiler is calculated; and if not, adjusting the coal quantity of the coal type, and then recalculating the output value of the boiler. Therefore, the technical problems that in the related technology, due to the fact that the output of the boiler is affected by changes of coal type parameters, the output of a draught fan is insufficient, and the safety and stability of a boiler coal pulverizing system, a combustion system and a steam-water system are affected are solved.

Description

Technical Field

[0001] This application relates to the technical field of load forecasting for coal-fired units, and particularly to a method, device, equipment, medium and program product for calculating boiler output. Background Art

[0002] In related technologies, the proportion of different coal types in the mixed pulverized coal can be adjusted by using multiple coal blending devices, and the coal quantity of the coal combustion can be controlled by multiple coal quantity control machines, and then the mixed pulverized coal can be obtained, so as to realize the mixed combustion of different coal types. It is also possible to store different coal types in different coal mills. For example, the coal types with easy coking, difficult combustion, and poor ignition characteristics are mixed with the coal types with high volatile powder in Mill A, and the coal types with higher carbon content and longer burnout time are configured in Mill B. By adjusting the outlet temperature and fineness of the pulverized coal of the coal mill, the normal operation of the unit can be ensured.

[0003] However, in related technologies, the change of coal type parameters will affect the output of the boiler, which will in turn lead to insufficient output of the induced draft fan, affecting the safety and stability of the boiler coal pulverizing system, combustion system and steam-water system, and urgent improvement is needed. Summary of the Invention

[0004] This application provides a method, device, equipment, medium and program product for calculating boiler output to solve the problems in related technologies that the change of coal type parameters will affect the output of the boiler, which will in turn lead to insufficient output of the induced draft fan, affecting the safety and stability of the boiler coal pulverizing system, combustion system and steam-water system.

[0005] The first aspect of the embodiments of this application provides a method for calculating boiler output, including the following steps: obtaining the first information of coal type and coal quantity of at least one group of coal-fired units in the power system, and calculating the first output value of at least one coal mill, the first output value of at least one induced draft fan and / or the first pressure head of the at least one induced draft fan based on the first information of coal type and coal quantity; judging whether the load of the at least one group of coal-fired units is the target load based on the first output value of the coal mill, the first output value of the induced draft fan and / or the first pressure head of the induced draft fan; if the load is the target load, calculating the output value of the boiler in the power system based on the first output value of the coal mill, the first output value of the induced draft fan and / or the first pressure head of the induced draft fan; if the load is not the target load, adjusting the first information of coal type and coal quantity to the second information of coal type and coal quantity based on the target load, and recalculating the second output value of the at least one coal mill, the second output value of the at least one induced draft fan and / or the second pressure head of the at least one induced draft fan based on the second information of coal type and coal quantity, so as to calculate the output value of the boiler by using the second output value of the coal mill, the second output value of the induced draft fan and / or the second pressure head of the induced draft fan.

[0006] Through the above technical solution, the first output value of the coal mill, the first output value of the induced draft fan, and the first pressure head of the induced draft fan can be calculated according to the first information of the coal type and coal quantity. Then, based on the first output value of the coal mill, the first output value of the induced draft fan, and the first pressure head of the induced draft fan, it can be determined whether the load of the at least one group of coal-fired units is the target load. When the load is the target load, the output value of the boiler is calculated. When the load is not the target load, the coal type and coal quantity are adjusted, and the second output value of the coal mill, the second output value of the induced draft fan, and the second pressure head of the induced draft fan are recalculated, so as to calculate the output value of the boiler. By monitoring the coal type and coal quantity information in real time, the outputs of the coal mill and the induced draft fan can be controlled more precisely, ensuring that the coal-fired unit operates in the best state. When the load of the coal-fired unit does not match the target load, the coal type and coal quantity information are adjusted in a timely manner to ensure that the unit can operate stably and efficiently, thereby improving the output efficiency and stability of the boiler and reducing energy waste.

[0007] Optionally, in an embodiment of the present application, determining whether the load of the at least one group of coal-fired units is the target load based on the first output value of the coal mill, the first output value of the induced draft fan, and / or the first pressure head of the induced draft fan includes: determining whether the first output value of the coal mill is less than a preset output value of the coal mill, whether the first output value of the induced draft fan is less than a preset output value of the induced draft fan, and whether the first pressure head of the induced draft fan is less than a preset pressure head of the induced draft fan; if the first output value of the coal mill is less than the preset output value of the coal mill, the first output value of the induced draft fan is less than the preset output value of the induced draft fan, and the first pressure head of the induced draft fan is less than the preset pressure head of the induced draft fan, then it is determined that the load is the target load; if the first output value of the coal mill is greater than or equal to the preset output value of the coal mill, the first output value of the induced draft fan is greater than or equal to the preset output value of the induced draft fan, or the first pressure head of the induced draft fan is greater than or equal to the preset pressure head of the induced draft fan, then it is determined that the load is not the target load.

[0008] Through the above technical solution, when the first output value of the coal mill, the first output value of the induced draft fan, and the first pressure head of the induced draft fan are all less than a certain value at the same time, it can be determined that the load is the target load. When the first output value of the coal mill, the first output value of the induced draft fan, and the first pressure head of the induced draft fan are not all less than a certain value at the same time, it can be determined that the load is not the target load. Through multi-dimensional judgment, the operating state of the coal-fired unit can be more comprehensively reflected, the load can be more accurately identified whether it is the target load, the load state of the unit can be more effectively judged, and when the load is not the target load, the coal type and coal quantity information can be adjusted in a timely manner according to the actual situation, thereby improving the flexibility and response speed of the unit and reducing the unstable phenomenon of the power grid caused by load fluctuations, ensuring the stable operation of the power system.

[0009] Optionally, in an embodiment of the present application, calculating the first output value of at least one coal mill based on the first information of coal type and coal quantity includes: calculating the first coal combustion quantity of the boiler based on the first information of coal type and coal quantity; calculating the first output value of the coal mill based on the first coal combustion quantity of the boiler.

[0010] Through the above technical solution, the first coal combustion quantity of the boiler can be calculated through the first information of coal type and coal quantity, and then the first output value of the coal mill can be calculated, which can more accurately reflect the actual consumption of coal, avoid the deviation of the final result caused by the error of intermediate parameters, improve the accuracy of the calculation result, and timely discover potential problems of the boiler by real-time monitoring the output value of the coal mill, thus avoiding the occurrence of faults.

[0011] Optionally, in an embodiment of the present application, before calculating the first output value of at least one induced draft fan based on the first information of coal type and coal quantity, it further includes: detecting the oxygen content in the flue gas at the outlet of the air preheater and the oxygen content in the flue gas at the inlet of the power system; calculating the air leakage rate of the air preheater based on the oxygen content in the outlet flue gas and the oxygen content in the inlet flue gas.

[0012] Through the above technical solution, the air leakage rate of the air preheater can be calculated according to the oxygen content in the flue gas at the outlet of the air preheater and the oxygen content in the flue gas at the inlet, so as to comprehensively understand the operating state of the air preheater, timely discover and solve potential problems, and adjust the operating strategy of the induced draft fan to ensure the stable operation of the boiler system, thereby improving the reliability and safety of the entire boiler system.

[0013] Optionally, in an embodiment of the present application, calculating the first output value of at least one induced draft fan based on the first information of coal type and coal quantity includes: calculating the mass flow rate of the at least one induced draft fan based on the air leakage rate of the air preheater; calculating the first output value of the at least one induced draft fan at at least one temperature based on the mass flow rate of the induced draft fan.

[0014] Through the above technical solution, the mass flow rate of the induced draft fan can be calculated according to the air leakage rate of the air preheater, and then the first output value of the induced draft fan can be calculated. By considering the air leakage rate of the air preheater, the mass flow rate of the induced draft fan can be calculated more accurately, improving the accuracy of the calculation of the output value of the induced draft fan. Combining different temperatures can more comprehensively reflect the actual operating conditions of the induced draft fan, further improving the accuracy of the calculation.

[0015] The second aspect of the embodiments of the present application provides a boiler output calculation device, including: an acquisition module, configured to acquire first information on coal types and coal quantities of at least one group of coal-fired units in a power system, and calculate a first output value of at least one coal mill, a first output value of at least one induced draft fan, and / or a first head of the at least one induced draft fan based on the first information on coal types and coal quantities; a judgment module, configured to judge whether the load of the at least one group of coal-fired units is a target load based on the first output value of the coal mill, the first output value of the induced draft fan, and / or the first head of the induced draft fan; a first calculation module, configured to calculate an output value of a boiler in the power system based on the first output value of the coal mill, the first output value of the induced draft fan, and / or the first head of the induced draft fan when the load is the target load; a second calculation module, configured to adjust the first information on coal types and coal quantities to second information on coal types and coal quantities based on the target load when the load is not the target load, and recalculate a second output value of the at least one coal mill, a second output value of the at least one induced draft fan, and / or a second head of the at least one induced draft fan based on the second information on coal types and coal quantities, so as to calculate the output value of the boiler by using the second output value of the coal mill, the second output value of the induced draft fan, and / or the second head of the induced draft fan.

[0016] Through the above technical solution, the first output value of the coal mill, the first output value of the induced draft fan, and the first head of the induced draft fan can be calculated according to the first information on coal types and coal quantities, and it can be judged whether the load is the target load based on the first output value of the coal mill, the first output value of the induced draft fan, and the first head of the induced draft fan. When the load is the target load, the output value of the boiler is calculated. When the load is not the target load, the coal types and coal quantities are adjusted, and the second output value of the coal mill, the second output value of the induced draft fan, and the second head of the induced draft fan are recalculated, so as to calculate the output value of the boiler. By monitoring the information on coal types and coal quantities in real time, the output of the coal mill and the induced draft fan can be controlled more precisely, ensuring that the coal-fired unit operates in the best state. When the load of the coal-fired unit does not match the target load, the information on coal types and coal quantities is adjusted in time to ensure that the unit can operate stably and efficiently, thereby improving the output efficiency and stability of the boiler and reducing energy waste.

[0017] Optionally, in an embodiment of the present application, the determination module includes: a determination unit configured to determine whether a first output value of the coal mill is less than a preset coal mill output value, whether a first output value of the induced draft fan is less than a preset induced draft fan output value, and whether a first pressure head of the induced draft fan is less than a preset induced draft fan pressure head; a first determination unit configured to determine that the load is the target load when the first output value of the coal mill is less than the preset coal mill output value, the first output value of the induced draft fan is less than the preset induced draft fan output value, and the first pressure head of the induced draft fan is less than the preset induced draft fan pressure head; and a second determination unit configured to determine that the load is not the target load when the first output value of the coal mill is greater than or equal to the preset coal mill output value, the first output value of the induced draft fan is greater than or equal to the preset induced draft fan output value, or the first pressure head of the induced draft fan is greater than or equal to the preset induced draft fan pressure head.

[0018] Through the above technical solution, when the first output value of the coal mill, the first output value of the induced draft fan, and the first pressure head of the induced draft fan are all less than a certain value, it can be determined that the load is the target load. When the first output value of the coal mill, the first output value of the induced draft fan, and the first pressure head of the induced draft fan are not all less than a certain value, it can be determined that the load is not the target load. Through multi-dimensional judgment, the operating state of the coal-fired unit can be more comprehensively reflected, the load can be more accurately identified whether it is the target load, the load state of the unit can be more effectively judged, and when the load is not the target load, the coal type and coal quantity information can be adjusted in time according to the actual situation, thereby improving the flexibility and response speed of the unit, reducing the unstable phenomenon of the power grid caused by load fluctuations, and ensuring the stable operation of the power system.

[0019] Optionally, in an embodiment of the present application, the acquisition module includes: a first calculation unit configured to calculate a first boiler coal consumption of the boiler based on the first coal type and coal quantity information; and a second calculation unit configured to calculate the first output value of the coal mill based on the first boiler coal consumption.

[0020] Through the above technical solution, the first boiler coal consumption of the boiler can be calculated through the first coal type and coal quantity information, and then the first output value of the coal mill can be calculated, which can more accurately reflect the actual coal consumption situation, avoid the deviation of the final result caused by the error of intermediate parameters, improve the accuracy of the calculation result, and timely discover potential problems of the boiler by real-time monitoring the output value of the coal mill, thus avoiding the occurrence of faults.

[0021] Optionally, in an embodiment of the present application, it further includes: a detection module, configured to detect the oxygen content in the flue gas at the outlet of the air preheater and the oxygen content in the flue gas at the inlet in the power system before calculating the first output value of at least one induced draft fan based on the first information of the coal type and coal quantity; a third calculation module, configured to calculate the air leakage rate of the air preheater based on the oxygen content in the outlet flue gas and the oxygen content in the inlet flue gas.

[0022] Through the above technical solution, the air leakage rate of the air preheater can be calculated according to the oxygen content in the flue gas at the outlet of the air preheater and the oxygen content in the inlet flue gas, so as to comprehensively understand the operating state of the air preheater, timely discover and solve potential problems, and adjust the operating strategy of the induced draft fan to ensure the stable operation of the boiler system, thereby improving the reliability and safety of the entire boiler system.

[0023] Optionally, in an embodiment of the present application, the detection module includes: a third calculation unit, configured to calculate the mass flow rate of at least one induced draft fan based on the air leakage rate of the air preheater; a fourth calculation unit, configured to calculate the first output value of at least one induced draft fan at at least one temperature based on the mass flow rate of the induced draft fan.

[0024] Through the above technical solution, the mass flow rate of the induced draft fan can be calculated according to the air leakage rate of the air preheater, and then the first output value of the induced draft fan can be calculated. By considering the air leakage rate of the air preheater, the mass flow rate of the induced draft fan can be calculated more accurately, improving the accuracy of calculating the output value of the induced draft fan. Combining different temperatures can more comprehensively reflect the actual operating conditions of the induced draft fan and further improve the accuracy of the calculation.

[0025] An embodiment of the third aspect of the present application provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the program to implement the boiler output calculation method as described in the above embodiment.

[0026] An embodiment of the fourth aspect of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the program is executed by a processor, the above boiler output calculation method is implemented.

[0027] An embodiment of the fifth aspect of the present application provides a computer program product, including a computer program, and when the program is executed, the above boiler output calculation method is implemented.

[0028] The embodiments of the present application can calculate the first output value of the coal mill, the first output value of the induced draft fan, and the first pressure head of the induced draft fan according to the first information of the coal type and coal quantity, and determine whether the load is the target load based on the first output value of the coal mill, the first output value of the induced draft fan, and the first pressure head of the induced draft fan. When the load is the target load, calculate the output value of the boiler. When the load is not the target load, adjust the coal type and coal quantity, recalculate the second output value of the coal mill, the second output value of the induced draft fan, and the second pressure head of the induced draft fan, so as to calculate the output value of the boiler. By monitoring the coal type and coal quantity information in real time, the output of the coal mill and the induced draft fan can be regulated more precisely, ensuring that the coal-fired unit operates in the best state. When the load of the coal-fired unit does not match the target load, adjust the coal type and coal quantity information in time to ensure that the unit can operate stably and efficiently, thereby improving the output efficiency and stability of the boiler and reducing energy waste. Thus, it solves the technical problems in the related art that the change of coal type parameters will affect the output of the boiler, which in turn leads to insufficient output of the fan and affects the safety and stability of the coal pulverizing system, combustion system, and steam-water system of the boiler.

[0029] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. Brief Description of the Drawings

[0030] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, where:

[0031] Figure 1 It is a block diagram of a boiler output calculation system according to an embodiment of the present application;

[0032] Figure 2 It is a flowchart of a boiler output calculation method according to an embodiment of the present application;

[0033] Figure 3 It is a flowchart of the working principle of a boiler output calculation method according to an embodiment of the present application;

[0034] Figure 4 It is a block diagram of a boiler output calculation device according to an embodiment of the present application;

[0035] Figure 5 It is a structural diagram of an electronic device according to an embodiment of the present application.

[0036] Reference Signs:

[0037] Among them, 10 - boiler output calculation system; 101 - coal conveyor belt, 102 - on - line coal quality component detection system, 103 - data signal transmission system, 104 - display, 105 - coal feeder, 106 - coal dropping pipe, 107 - coal mill, 108 - pulverized coal pipeline, 109 - burner, 110 - boiler, 111 - air preheater, 112 - air preheater air leakage rate monitoring system, 113 - induced draft fan, 114 - induced draft fan output monitoring system; 40 - boiler output calculation device; 100 - acquisition module, 200 - judgment module, 300 - first calculation module, 400 - second calculation module; 501 - memory, 502 - processor, 503 - communication interface. Detailed implementation manners

[0038] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application.

[0039] The boiler output calculation method, device, equipment, medium and program product of the embodiments of the present application will be described below with reference to the accompanying drawings. Regarding the problem mentioned in the above - mentioned background technology that the change of coal type parameters will affect the output of the boiler, which in turn leads to insufficient output of the fan and affects the safety and stability of the boiler coal - pulverizing system, combustion system and steam - water system, the present application provides a boiler output calculation method. In this method, the first output value of the coal mill, the first output value of the induced draft fan and the first pressure head of the induced draft fan can be calculated according to the first information of coal type and coal quantity. And whether the load is the target load can be judged by the first output value of the coal mill, the first output value of the induced draft fan and the first pressure head of the induced draft fan. When the load is the target load, the output value of the boiler is calculated. When the load is not the target load, the coal type and coal quantity are adjusted, and the second output value of the coal mill, the second output value of the induced draft fan and the second pressure head of the induced draft fan are recalculated, so as to calculate the output value of the boiler. By real - time monitoring of the coal type and coal quantity information, the output of the coal mill and the induced draft fan can be more accurately regulated, ensuring that the coal - fired unit operates in the best state. And when the load of the coal - fired unit does not match the target load, the coal type and coal quantity information are adjusted in time to ensure that the unit can operate stably and efficiently, thereby improving the output efficiency and stability of the boiler and reducing energy waste. Thus, the technical problems in the related art that the change of coal type parameters will affect the output of the boiler, which in turn leads to insufficient output of the fan and affects the safety and stability of the boiler coal - pulverizing system, combustion system and steam - water system are solved.

[0040] Before introducing the boiler output calculation method proposed in the embodiments of the present application, the boiler output calculation system involved in the embodiments of the present application will be introduced first.

[0041] Specifically, Figure 1It is a block diagram of a boiler output calculation system provided according to an embodiment of the present application.

[0042] Among them, the boiler output calculation system 10 includes: a coal conveying belt 101, an on-line coal quality component detection system 102, a data signal transmission system 103, a display 104, a coal feeder 105, a coal dropping pipe 106, a coal mill 107, a pulverized coal pipeline 108, a burner 109, a boiler 110, an air preheater 111, an air preheater air leakage rate monitoring system 112, an induced draft fan 113, and an induced draft fan output monitoring system 114.

[0043] Among them, the on-line coal quality component detection system 102 conveys the coal for the boiler 110 through the coal conveying belt 101 into the coal feeder 105. The on-line coal quality component detection system 102 is arranged above the coal conveying belt 101 and can detect the coal type components in real time: elemental analysis, proximate analysis, moisture, ash, etc., and transmit this data to the display 104 through the data signal transmission system 103.

[0044] The air preheater air leakage rate monitoring system 112 can install flue gas sampling pipes at multiple points by the grid method on the inlet and outlet flue gas cross-sections of the air preheater 111. The induced draft pump introduces the flue gas into the oxygen analyzer, and the oxygen content in the flue gas is measured by the analyzer, and then the air leakage rate of the air preheater is calculated.

[0045] The induced draft fan output monitoring system 114 calculates the output of the induced draft fan 113 by using the data of the on-line coal quality component detection system 102 and the air preheater air leakage rate monitoring system 112.

[0046] Specifically, Figure 2 It is a flowchart of a boiler output calculation method provided according to an embodiment of the present application.

[0047] As Figure 2 shown, the boiler output calculation method includes the following steps:

[0048] In step S201, obtain the first information of the coal type and coal quantity of at least one group of coal-fired units in the power system, and based on the first information of the coal type and coal quantity, calculate the first output value of at least one coal mill, the first output value of at least one induced draft fan, and / or the first head of at least one induced draft fan.

[0049] It can be understood that the first information of the coal type and coal quantity in the embodiment of the present application may include, but is not limited to, the types of coal used, such as lignite, bituminous coal, and anthracite, etc. The present application does not make specific limitations. The usage amounts of different coals, such as the actual usage amount of lignite is XX, the designed usage amount is XX, the actual usage amount of bituminous coal is XX, the designed usage amount is XX, and the actual usage amount of anthracite is XX, the designed usage amount is XX.

[0050] In addition, in the embodiments of the present application, the power system may include a set of coal-fired units or multiple sets of coal-fired units, which can be specifically set by those skilled in the art according to the actual situation, and the present application does not make specific limitations.

[0051] In addition, the output value of the coal mill in the embodiments of the present application can be understood as the amount of raw coal ground by the coal mill per unit time under the condition of ensuring a certain fineness of pulverized coal. The output value of the coal mill is affected by various factors, which can include but are not limited to the type of coal mill, the characteristics of coal types, the internal structure of the coal mill (such as the loading amount of steel balls, the coal-carrying amount, etc., and the present application does not make specific limitations), and operating parameters, etc., and the present application does not make specific limitations.

[0052] The output value of the induced draft fan can be measured by the air volume of the induced draft fan, and its main function is to extract or introduce external air to maintain the negative pressure in the power system or provide the required air volume. The output value of the induced draft fan is affected by various factors such as model, structure, rotational speed, and motor power.

[0053] In the induced draft fan, the head can be understood as the pressure difference overcome by the gas during transportation. It should be noted that the head is related to the air volume, rotational speed, etc. of the induced draft fan and jointly determines the performance of the induced draft fan.

[0054] In some embodiments, the embodiments of the present application can calculate the first output value of at least one coal mill, the first output value of at least one induced draft fan, and the first head of the induced draft fan according to the first information of the coal type and coal quantity of the coal-fired units in the power system. Among them, at least one can be one or multiple, which can be specifically set by those skilled in the art according to the actual situation, and the present application does not make specific limitations.

[0055] Optionally, in an embodiment of the present application, calculating the first output value of at least one coal mill based on the first information of the coal type and coal quantity includes: calculating the first coal-fired quantity of the boiler based on the first information of the coal type and coal quantity; calculating the first output value of the coal mill based on the first coal-fired quantity of the boiler.

[0056] As a possible implementation manner, the embodiments of the present application calculate the first coal-fired quantity of the boiler based on the first information of the coal type and coal quantity, and then calculate the first output value of the coal mill.

[0057] For example, as Figure 1 shown, the embodiments of the present application can determine the first information of the coal type and coal quantity according to different loads, such as the calorific value and coal quantity of the design coal type and the calorific value of the actual coal type, and then calculate the required first coal-fired quantity of the boiler according to the load of the coal-fired unit, such as the actual coal quantity. Its calculation formula can include but is not limited to:

[0058] M 煤量 =M 煤量设计 ×J 煤热值设计值 / J 实际煤热值 ,

[0059] wherein, M 煤量 is the coal combustion amount of the boiler under the actual coal type, in t / h, and M 煤量设计 is the coal combustion amount of the boiler under the designed coal type, in t / h, and J 煤热值设计值 is the calorific value of the designed coal, in MJ / kg, J 实际煤热值 and is the calorific value of the actual coal, in MJ / kg.

[0060] Furthermore, the embodiment of the present application can calculate the first output value of the coal mill according to the coal amount of the actual coal type. The calculation formula can be but is not limited to:

[0061] B 磨煤机实际出力 = M 煤量 / N,

[0062] wherein, M 煤量 is the coal combustion amount of the boiler under the actual coal type, in t / h, and N is the number of coal mills.

[0063] Optionally, in an embodiment of the present application, before calculating the first output value of at least one induced draft fan based on the first information of the coal type and coal amount, it further includes: detecting the oxygen content in the flue gas at the outlet of the air preheater and the oxygen content in the flue gas at the inlet of the air preheater in the power system; calculating the air leakage rate of the air preheater based on the oxygen content in the outlet flue gas and the oxygen content in the inlet flue gas.

[0064] It can be understood that the oxygen content in the outlet flue gas in the embodiment of the present application can be understood as the amount of excess air in the flue gas, which can be expressed as the volume percentage of oxygen and flue gas volume. It is an important indicator to measure the combustion efficiency and environmental emission quality.

[0065] The oxygen content in the inlet flue gas can be understood as the air condition before the combustion system. During the combustion process, the combustion-supporting air will carry oxygen into the furnace and react with the fuel. If there is an air leakage phenomenon, then the external air will carry oxygen into the furnace, resulting in an increase in the oxygen content in the inlet flue gas.

[0066] The air leakage rate of the air preheater can be understood as the percentage of the mass of the air leaking into the flue gas side of a certain section of the flue to the mass of the flue gas in that section. It is an important indicator to measure the sealing performance of the air preheater. An excessively high air leakage rate will cause an increase in the oxygen content in the combustion system, thereby affecting the combustion efficiency and environmental emission quality. Therefore, it is necessary to regularly inspect and maintain the air preheater to ensure its good sealing performance.

[0067] As a possible implementation manner, the embodiment of the present application can obtain the oxygen content in the flue gas at the inlet and outlet of the air preheater when calculating the air leakage rate of the air preheater, and then obtain the corresponding air leakage rate of the air preheater.

[0068] For example, such asFigure 1 As shown, embodiments of the present application can calculate the air preheater air leakage rate by using the oxygen content in the flue gas at the inlet and outlet of the air preheater in the air preheater air leakage rate monitoring system. The calculation formula can be, but is not limited to:

[0069]

[0070] where η is the air preheater air leakage rate, %, O 2出口 and O 2进口 are the oxygen content in the flue gas at the outlet and inlet of the air preheater respectively, %.

[0071] Optionally, in an embodiment of the present application, based on the first information of coal type and coal quantity, calculate the first output value of at least one induced draft fan, including: calculating the mass flow rate of at least one induced draft fan based on the air preheater air leakage rate; calculating the first output value of at least one induced draft fan at at least one temperature based on the mass flow rate of the induced draft fan.

[0072] Those skilled in the art can understand that in the embodiments of the present application, the air preheater air leakage rate affects the volume flow rate of the air processed by the induced draft fan. In actual application, the volume flow rate of the induced draft fan may also be affected by factors such as temperature. Therefore, embodiments of the present application can calculate the initial volume flow rate of the induced draft fan at a certain temperature, and then correct the initial volume flow rate according to the actual temperature and the actual air preheater air leakage rate, and then obtain the corresponding volume flow rate, so as to calculate the first output value of the induced draft fan.

[0073] For example, as Figure 1 shown, embodiments of the present application can first calculate the mass flow rate of the induced draft fan according to the air preheater air leakage rate through the induced draft fan output monitoring system. The calculation formula can be, but is not limited to:

[0074] M 引风机 = M 煤量 × m 烟气 × (1 + η / 100),

[0075] where M 引风机 is the mass flow rate of the induced draft fan, t / h; M 煤量 is the coal consumption of the boiler, t / h; η is the air preheater air leakage rate, %; m 烟气 is the flue gas volume generated by coal combustion, kg / kg coal.

[0076] Furthermore, in the embodiments of the present application, the calculation formula of the flue gas volume generated by coal combustion can be, but is not limited to:

[0077] m 烟气 = 1 - A ar / 100 + 1.306 × a × V 0 ,

[0078] Among them, A ar is the as-received ash content of coal, %; a is the excess air coefficient at the outlet of the economizer of the boiler; V 0 is the theoretical air volume required for combustion, Nm 3 / kg.

[0079] Among them, the calculation formula for the excess air coefficient at the outlet of the economizer of the boiler in the embodiment of the present application can be but is not limited to:

[0080]

[0081] Among them, O 2省煤器出口 is the oxygen content at the outlet of the economizer of the boiler, %.

[0082] The calculation formula for the theoretical air volume required for combustion can be but is not limited to:

[0083] V 0 = 0.0889×(C ar + 0.375×S ar ) + 0.265×H ar - 0.0333×O ar ,

[0084] Among them, C ar is the carbon content on an as-received basis of the coal type, %; S ar is the sulfur content on an as-received basis of the coal type, %; H ar is the hydrogen content on an as-received basis of the coal type, %; O ar is the oxygen content on an as-received basis of the coal type, %.

[0085] Furthermore, in the embodiment of the present application, the first output value of the induced draft fan at the actual temperature of the induced draft fan can be calculated through the mass flow rate of the induced draft fan and the flue gas density at the actual temperature, and its calculation formula can be but is not limited to:

[0086] Q v烟气 = 1000×M 引风机 / ρ v烟气 ,

[0087] Among them, Q v烟气 is the volume flow rate at the actual temperature of the induced draft fan, m 3 / h; ρ v烟气 is the flue gas density at the actual temperature, kg / m 3 .

[0088] Among them, the calculation formula for the flue gas density at the actual temperature can be but is not limited to:

[0089]

[0090] Among them, ρ 0 is the flue gas density under standard conditions, kg / Nm3 ; P amb is the local atmospheric pressure, Pa; P s is the static pressure at the inlet of the induced draft fan, Pa; t is the flue gas temperature at the inlet of the induced draft fan, °C.

[0091] Among them, the calculation formula for the flue gas density under standard conditions can be but is not limited to:

[0092]

[0093] Among them, m 理论干烟气 is the theoretical dry flue gas volume generated by coal combustion, kg / kg coal; V GY is the dry flue gas volume, m 3 / kg.

[0094] The calculation formula for the theoretical dry flue gas volume generated by coal combustion can be but is not limited to:

[0095] m 理论干烟气 = 0.0357×(C ar + 0.0357×S ar ) + 0.1×N ar + 1.293×(a 1 - 0.2356)×V 0 ,

[0096] Among them, N ar is the nitrogen content on the as-received basis of the coal, %.

[0097] The calculation formula for the dry flue gas volume can be but is not limited to:

[0098] V GY = V GY0 + 1.016×(a 1 - 1)×V 0 ,

[0099] Among them, V GY0 is the theoretical dry flue gas volume, m 3 / kg; a 1 is the excess air coefficient of air at the inlet of the induced draft fan.

[0100] Among them, the calculation formula for the excess air coefficient of air at the inlet of the induced draft fan can be but is not limited to:

[0101]

[0102] Among them, O 2引风机入口 is the oxygen content at the inlet of the induced draft fan, %.

[0103] The calculation formula for the theoretical dry flue gas volume can be but is not limited to:

[0104]

[0105] Among them, is the volume of ternary gas in the flue gas, m 3 / kg; is the volume of nitrous oxide in the flue gas, m 3 / kg.

[0106] Among them, the calculation formula for the volume of ternary gas in the flue gas can be but is not limited to:

[0107]

[0108] The calculation formula for the volume of nitrous oxide in the flue gas can be but is not limited to:

[0109]

[0110] In step S202, based on the first output value of the coal mill, the first output value of the induced draft fan, and / or the first head of the induced draft fan, it is determined whether the load of at least one group of coal-fired units is the target load.

[0111] In the actual implementation process, in order to determine whether the load of the coal-fired unit is the target load in the embodiment of the present application, it can be comprehensively determined by the first output value of the coal mill, the first output value of the induced draft fan, and the first head of the induced draft fan.

[0112] For example, in the embodiment of the present application, it is assumed that the target load is the full load W (MW) of the unit. After the coal type and coal quantity change, it will affect the load of the coal-fired unit, that is, whether the load of the coal-fired unit is the full load of the unit. If the coal-fired unit is equipped with N coal mills, N - 1 coal mills can meet the full load of the unit, and 1 coal mill is reserved. After the coal type and coal quantity change, N coal mills can meet the full load of the unit, and other loads can also be met. Therefore, it can be evaluated whether the coal mill can meet the full load requirement of the unit.

[0113] Optionally, in an embodiment of the present application, based on the first output value of the coal mill, the first output value of the induced draft fan, and / or the first head of the induced draft fan, determining whether the load of at least one group of coal-fired units is the target load includes: determining whether the first output value of the coal mill is less than the preset output value of the coal mill, whether the first output value of the induced draft fan is less than the preset output value of the induced draft fan, and whether the first head of the induced draft fan is less than the preset head of the induced draft fan; if the first output value of the coal mill is less than the preset output value of the coal mill, the first output value of the induced draft fan is less than the preset output value of the induced draft fan, and the first head of the induced draft fan is less than the preset head of the induced draft fan, then it is determined that the load is the target load; if the first output value of the coal mill is greater than or equal to the preset output value of the coal mill, the first output value of the induced draft fan is greater than or equal to the preset output value of the induced draft fan, or the first head of the induced draft fan is greater than or equal to the preset head of the induced draft fan, then it is determined that the load is not the target load.

[0114] In some embodiments, the content for the embodiment of the present application to determine whether the load of the coal-fired unit is the target load may be: when the first output value of the coal mill is less than a certain coal mill output value, determine whether the first output value of the induced draft fan is less than a certain induced draft fan output value and whether the first pressure head of the induced draft fan is less than a certain induced draft fan pressure head. When the first output value of the induced draft fan is less than a certain induced draft fan output value and the first pressure head of the induced draft fan is less than a certain induced draft fan pressure head, determine that the load is the target load. Among them, the certain coal mill output value, the certain induced draft fan output value, and the certain induced draft fan pressure head can be set by those skilled in the art according to the actual situation, and the present application does not make specific limitations.

[0115] In some embodiments, the content for the embodiment of the present application to determine whether the load of the coal-fired unit is the target load may be: when the first output value of the coal mill is less than a certain coal mill output value, determine whether the first output value of the induced draft fan is less than a certain induced draft fan output value and whether the first pressure head of the induced draft fan is less than a certain induced draft fan pressure head. When the first output value of the induced draft fan is greater than or equal to the preset induced draft fan output value, or the first pressure head of the induced draft fan is greater than or equal to the preset induced draft fan pressure head, determine that the load is not the target load.

[0116] In some embodiments, the content for the embodiment of the present application to determine whether the load of the coal-fired unit is the target load may be: when the first output value of the coal mill is greater than or equal to a certain coal mill output value, determine that the load is not the target load.

[0117] Among them, in the embodiment of the present application, the certain coal mill output value can be combined with Figure 1 , and calculated by using the on-line coal quality component detection system to display the actual coal combustion components and designed coal combustion components entering each coal mill in real time. The embodiment of the present application compares the actual coal combustion components with the designed coal combustion components, calculates the maximum output of the coal mill under the actual coal combustion according to the output of the coal mill under the designed coal type, the actual coal combustion components, and the designed coal combustion components, and calculates the maximum output of the boiler powder preparation system according to the number of coal mills, and then calculates the maximum output of the boiler under the maximum output of the powder preparation system, that is, the certain coal mill output value. Its calculation formula can be but not limited to:

[0118] B m =B m0 ×f H ×f R ×f M ×f A ×f g ×f e ,

[0119] Among them, B M is the maximum output of the coal mill under the actual coal type, t / h; B M0 is the maximum output of the coal mill under the designed coal type, t / h; f His the correction coefficient of the grindability index of coal to the output of the coal mill; f R is the correction coefficient of the fineness of pulverized coal to the output of the coal mill; f M is the correction coefficient of the moisture content of coal to the output of the coal mill; f A is the correction coefficient of the ash content of coal to the output of the coal mill; f g is the correction coefficient of the particle size of coal to the output of the coal mill, usually taking a value of 1.0; f e is the correction coefficient of the wear of the grinding parts in the middle and later stages to the output of the coal mill, usually taking a value of 0.9.

[0120] Furthermore, in the embodiment of the present application, the calculation formula of the correction coefficient of the grindability index of coal to the output of the coal mill can be but is not limited to:

[0121]

[0122] where HGI 实际 and HGI 设计 are the grindability indexes of the actual coal type and the designed coal type respectively.

[0123] The calculation formula of the correction coefficient of the fineness of pulverized coal to the output of the coal mill can be but is not limited to:

[0124]

[0125] where R 90实际 and R 90设计 are the finenesses of the pulverized coal of the actual coal type and the designed coal type respectively.

[0126] The calculation formula of the correction coefficient of the moisture content of coal to the output of the coal mill can be but is not limited to:

[0127] f M =(1.0 + (12 - M t实际 ) × 0.0125) / (1.0 + (12 - M t设计 ) × 0.0125),

[0128] where M t实际 and M t设计 are the moisture contents on an as-received basis of the actual coal type and the designed coal type respectively, %.

[0129] The calculation formula of the correction coefficient of the ash content of coal to the output of the coal mill can be but is not limited to:

[0130] f A =(1 + (20 - A ar实际 ) × 0.005) / (1 + (20 - A ar设计 ) × 0.005),

[0131] where A ar实际and A ar设计 are the as - received ash content of the actual coal type and the as - received ash content of the designed coal type, respectively, %.

[0132] In addition, it should be noted that the embodiments of the present application can obtain a certain induced draft fan output value of the induced draft fan based on the calculated flue gas density at the actual temperature and the volume flow rate of the induced draft fan at the actual temperature. Its calculation formula can be but is not limited to:

[0133] Q 引风机流量设计值1 =Q 引风机设计值 ×ρ 设计 / ρ v烟气 ,

[0134] where Q 引风机流量设计值1 is the designed value of the volume flow rate of the induced draft fan at the actual temperature, m 3 / h; Q 引风机设计值 is the designed value of the volume flow rate of the induced draft fan at the designed temperature, m 3 / h; ρ 设计 is the flue gas density of the induced draft fan at the designed temperature, kg / m 3 .

[0135] Furthermore, the embodiments of the present application can compare the volume flow rate with the designed volume flow rate and calculate the change in the induced draft fan head. Its calculation formula can be but is not limited to:

[0136] P 引风机压头 =P 设计值 ×(Q v烟气 / Q 引风机设计值 ) 3 ,

[0137] where P 引风机压头 is the head of the induced draft fan at the actual flue gas temperature of the actual coal type, Pa; P 设计值 is the head of the induced draft fan at the designed flue gas temperature of the designed coal type, Pa.

[0138] For example, in the embodiments of the present application, if B 磨煤机实际出力 is greater than B m , it indicates that N - 1 coal mills cannot meet the requirements of the actual coal type coal quantity and the target load. If B 磨煤机实际出力 is less than B m at this time, it indicates that the operation of N - 1 coal mills meets the requirements of the actual coal type coal quantity and the target load. At this time, the embodiments of the present application also need to consider whether the first output value Q v烟气 of the induced draft fan and the first head P 引风机压头 of the induced draft fan are less than a certain value. If Q v烟气 is less than Q 引风机流量设计值1 and P 引风机压头 is less than P 设计值, it can be determined that under the actual coal type and coal quantity, N-1 coal mills and induced draft fans meet the target load. If B 磨煤机实际出力 , Q v烟气 and P 引风机压头 If any one of the three parameters is greater than or equal to a certain value, it indicates that the target load requirement cannot be met at this time.

[0139] In step S203, if the load is the target load, based on the first output value of the coal mill, the first output value of the induced draft fan, and / or the first pressure head of the induced draft fan, calculate the output value of the boiler in the power system.

[0140] In some embodiments, when the load of the coal-fired unit in the embodiment of the present application is the target load, the first output value of the coal mill, the first output value of the induced draft fan, and the first pressure head of the induced draft fan can be used to calculate the output value of the boiler.

[0141] For example, in the embodiment of the present application, when B 磨煤机实际出力 is less than B m , Q v烟气 is less than Q 引风机流量设计值1 and P 引风机压头 is less than P 设计 , it is determined that the load is the target load. At this time, the embodiment of the present application can pass B 磨煤机实际出力 , Q v烟气 and P 引风机压头 to determine the output value of the boiler.

[0142] In step S204, if the load is not the target load, based on the target load, adjust the first information of the coal type and coal quantity to the second information of the coal type and coal quantity, and based on the second information of the coal type and coal quantity, recalculate the second output value of at least one coal mill, the second output value of at least one induced draft fan, and / or the second pressure head of at least one induced draft fan, so as to calculate the output value of the boiler using the second output value of the coal mill, the second output value of the induced draft fan, and / or the second pressure head of the induced draft fan.

[0143] In some embodiments, when the load in the embodiment of the present application is not the target load, the first information of the coal type and coal quantity can be adjusted to the second information of the coal type and coal quantity through the target load, and then the second output value of the coal mill, the second output value of the induced draft fan, and the second pressure head of the induced draft fan can be recalculated, and then the output value of the boiler can be obtained.

[0144] For example, if any one of the three parameters of B 磨煤机实际出力 , Q v烟气 and P 引风机压头 is greater than a certain value in the embodiment of the present application, it indicates that the load is not the target load. At this time, without modifying the equipment, the coal type and coal quantity need to be adjusted until the load is the target load, and then the output value of the boiler can be obtained.

[0145] In the embodiment of the present application, a fuel component input window is provided on the computer screen. Technicians input the coal type components into the system, and the system automatically calculates the actual output of the coal mill and the induced draft fan through the above evaluation method, and automatically judges and reminds whether the coal quantity of this coal type meets the target load requirement. If not, readjust the coal type and coal quantity until the outputs of the coal mill and the induced draft fan are both less than a certain value and meet the target load requirement, so as to guide the boiler coal blending.

[0146] Next, the working principle of the boiler output calculation method proposed in the embodiment of the present application will be introduced in detail in combination with a specific embodiment.

[0147] Among them, Figure 3 is a flowchart of the working principle of the boiler output calculation method provided according to an embodiment of the present application.

[0148] Step S301: Obtain the target load of the coal-fired unit.

[0149] Step S302: According to the calculated first output value of the coal mill, the first output value of the induced draft fan, and the first pressure head of the induced draft fan, judge whether the load of the coal-fired unit is the target load. If it is the target load, execute Step S303; if it is not the target load, execute Step S304.

[0150] Step S303: Determine the output value of the boiler according to the first output value of the coal mill, the first output value of the induced draft fan, and the first pressure head of the induced draft fan.

[0151] Step S304: Adjust the coal type and coal quantity until the load is the target load, and determine the output value of the boiler.

[0152] Among them, the embodiment of the present application can be combined with Figure 1 As shown, the coal type components are detected in real time by the on-line coal quality component detection system, the air preheater leakage rate is calculated by the air preheater leakage rate monitoring system, and the output of the induced draft fan is calculated by the induced draft fan output monitoring system. Then, the coal type and coal quantity are adjusted according to different target loads to meet the actual use requirements.

[0153] According to the boiler output calculation method provided by the embodiments of the present application, the first output value of the coal mill, the first output value of the induced draft fan, and the first head of the induced draft fan can be calculated based on the first information of the coal type and coal quantity. Then, it is determined whether the load is the target load based on the first output value of the coal mill, the first output value of the induced draft fan, and the first head of the induced draft fan. When the load is the target load, the output value of the boiler is calculated. When the load is not the target load, the coal type and coal quantity are adjusted, and the second output value of the coal mill, the second output value of the induced draft fan, and the second head of the induced draft fan are recalculated, so as to calculate the output value of the boiler. By monitoring the coal type and coal quantity information in real time, the output of the coal mill and the induced draft fan can be controlled more precisely, ensuring that the coal-fired unit operates in the best state. When the load of the coal-fired unit does not match the target load, the coal type and coal quantity information are adjusted in a timely manner to ensure that the unit can operate stably and efficiently, thereby improving the output efficiency and stability of the boiler and reducing energy waste. Thus, the technical problems in the related art that the change of coal type parameters affects the output of the boiler, which in turn leads to insufficient output of the fan and affects the safety and stability of the coal pulverizing system, combustion system, and steam-water system of the boiler are solved.

[0154] Next, the boiler output calculation device according to the embodiments of the present application will be described with reference to the accompanying drawings.

[0155] Figure 4 It is a block diagram of the boiler output calculation device provided by the embodiments of the present application.

[0156] As Figure 4 shown, the boiler output calculation device 40 includes: an acquisition module 100, a judgment module 200, a first calculation module 300, and a second calculation module 400.

[0157] Among them, the acquisition module 100 is configured to acquire the first information of the coal type and coal quantity of at least one group of coal-fired units in the power system, and calculate the first output value of at least one coal mill, the first output value of at least one induced draft fan, and / or the first head of at least one induced draft fan based on the first information of the coal type and coal quantity.

[0158] The judgment module 200 is configured to judge whether the load of at least one group of coal-fired units is the target load based on the first output value of the coal mill, the first output value of the induced draft fan, and / or the first head of the induced draft fan.

[0159] The first calculation module 300 is configured to calculate the output value of the boiler in the power system based on the first output value of the coal mill, the first output value of the induced draft fan, and / or the first head of the induced draft fan when the load is the target load.

[0160] A second calculation module 400, configured to, when the load is not the target load, adjust the first information on coal type and coal quantity to the second information on coal type and coal quantity based on the target load, and recalculate the second output value of at least one coal mill, the second output value of at least one induced draft fan, and / or the second head of at least one induced draft fan based on the second information on coal type and coal quantity, so as to calculate the output value of the boiler by using the second output value of the coal mill, the second output value of the induced draft fan, and / or the second head of the induced draft fan.

[0161] Optionally, in an embodiment of the present application, the determination module 200 includes: a determination unit, a first determination unit, and a second determination unit.

[0162] Wherein, the determination unit is configured to determine whether the first output value of the coal mill is less than a preset output value of the coal mill, whether the first output value of the induced draft fan is less than a preset output value of the induced draft fan, and whether the first head of the induced draft fan is less than a preset head of the induced draft fan.

[0163] The first determination unit is configured to determine that the load is the target load when the first output value of the coal mill is less than the preset output value of the coal mill, the first output value of the induced draft fan is less than the preset output value of the induced draft fan, and the first head of the induced draft fan is less than the preset head of the induced draft fan.

[0164] The second determination unit is configured to determine that the load is not the target load when the first output value of the coal mill is greater than or equal to the preset output value of the coal mill, the first output value of the induced draft fan is greater than or equal to the preset output value of the induced draft fan, or the first head of the induced draft fan is greater than or equal to the preset head of the induced draft fan.

[0165] Optionally, in an embodiment of the present application, the acquisition module 100 includes: a first calculation unit and a second calculation unit.

[0166] Wherein, the first calculation unit is configured to calculate the first boiler coal consumption of the boiler based on the first information on coal type and coal quantity.

[0167] The second calculation unit is configured to calculate the first output value of the coal mill based on the first boiler coal consumption.

[0168] Optionally, in an embodiment of the present application, it further includes: a detection module and a third calculation module.

[0169] Wherein, the detection module is configured to detect the oxygen content in the flue gas at the outlet of the air preheater and the oxygen content in the flue gas at the inlet of the air preheater in the power system before calculating the first output value of at least one induced draft fan based on the first information on coal type and coal quantity.

[0170] The third calculation module is configured to calculate the air leakage rate of the air preheater based on the oxygen content in the outlet flue gas and the oxygen content in the inlet flue gas.

[0171] Optionally, in one embodiment of the present application, the detection module includes: a third computing unit and a fourth computing unit.

[0172] Wherein, the third calculation unit is used to calculate the induced draft fan mass flow rate of at least one induced draft fan based on the air preheater leakage rate.

[0173] The fourth calculation unit is used to calculate a first output value of the induced draft fan of at least one induced draft fan at at least one temperature based on the mass flow rate of the induced draft fan.

[0174] It should be noted that the above explanations of the boiler output calculation method embodiment are also applicable to the boiler output calculation device of this embodiment, and will not be repeated here.

[0175] According to the boiler output calculation device proposed in the embodiment of the present application, the first output value of the coal mill, the first output value of the induced draft fan and the first pressure head of the induced draft fan can be calculated according to the first information of the coal type and coal quantity, and whether the load is the target load can be judged by the first output value of the coal mill, the first output value of the induced draft fan and the first pressure head of the induced draft fan, and when the load is the target load, the output value of the boiler is calculated, and when the load is not the target load, the coal type and coal quantity are adjusted, and the second output value of the coal mill, the second output value of the induced draft fan and the second pressure head of the induced draft fan are recalculated to calculate the output value of the boiler, and by real-time monitoring of the coal type and coal quantity information, the output of the coal mill and the induced draft fan can be more accurately regulated to ensure that the coal-fired unit operates in the best state, and when the load of the coal-fired unit does not match the target load, the coal type and coal quantity information is adjusted in time to ensure that the unit can operate stably and efficiently, thereby improving the output efficiency and stability of the boiler and reducing energy waste. As a result, technical problems in related technologies, such as changes in coal type parameters affecting the output of the boiler, which in turn leads to insufficient fan output and affects the safety and stability of the boiler pulverizing system, combustion system and steam-water system, are solved.

[0176] Figure 5 This is a schematic diagram of the structure of an electronic device provided according to an embodiment of the present application. The electronic device may include:

[0177] A memory 501 , a processor 502 , and a computer program stored in the memory 501 and executable on the processor 502 .

[0178] When the processor 502 executes the program, the boiler output calculation method provided in the above embodiment is implemented.

[0179] Furthermore, the electronic device further comprises:

[0180] The communication interface 503 is used for communication between the memory 501 and the processor 502 .

[0181] The memory 501 is used to store computer programs that can be executed on the processor 502 .

[0182] The memory 501 may include high-speed RAM memory and may also include non-volatile memory, such as at least one disk memory.

[0183] If the memory 501, the processor 502, and the communication interface 503 are implemented independently, the communication interface 503, the memory 501, and the processor 502 can be interconnected through a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of simplicity in representation, Figure 5 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0184] Optionally, in a specific implementation, if the memory 501, the processor 502, and the communication interface 503 are integrated on a single chip, the memory 501, the processor 502, and the communication interface 503 can communicate with each other through an internal interface.

[0185] The processor 502 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0186] The embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned boiler output calculation method is implemented.

[0187] The embodiments of the present application also provide a computer program product, including a computer program, and when the program is executed, the above-mentioned boiler output calculation method is implemented.

[0188] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0189] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "N" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0190] Any process or method description shown in a flowchart or described in other ways herein can be understood as representing a module, segment, or part of code including one or N executable instructions for implementing a customized logical function or process, and the scope of the preferred embodiments of this application includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in the reverse order according to the involved functions, rather than in the order shown or discussed, which should be understood by those skilled in the art to which the embodiments of this application belong.

[0191] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definable sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or in conjunction with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection part (electronic device) having one or N wirings, a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically by optically scanning the paper or other media, followed by editing, interpretation, or otherwise processing as appropriate, and then storing it in a computer memory.

[0192] It should be understood that various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0193] Those of ordinary skill in the art of this technology can understand that all or part of the steps carried by the method of implementing the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0194] In addition, each functional unit in various embodiments of the present application may be integrated into a processing module, may exist separately as individual physical units, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0195] The above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disc, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for calculating boiler output, characterized in that: The following steps are involved: Obtaining first information on the type and quantity of coal of at least one coal-fired unit in the power system, and calculating a first output value of at least one coal mill, a first output value of at least one induced draft fan, and / or a first pressure head of the at least one induced draft fan based on the first information on the type and quantity of coal; Based on the first output value of the coal mill, the first output value of the induced draft fan and / or the first pressure head of the induced draft fan, determining whether the load of the at least one group of coal-fired units is the target load; If the load is the target load, calculating the output value of the boiler in the power system based on the first output value of the coal mill, the first output value of the induced draft fan and / or the first pressure head of the induced draft fan; If the load is not the target load, the first information on the type and quantity of coal is adjusted to the second information on the type and quantity of coal based on the target load, and based on the second information on the type and quantity of coal, the second output value of the coal mill of the at least one coal mill, the second output value of the induced draft fan of the at least one induced draft fan and / or the second pressure head of the induced draft fan of the at least one induced draft fan are recalculated to calculate the output value of the boiler using the second output value of the coal mill, the second output value of the induced draft fan and / or the second pressure head of the induced draft fan.

2. The method according to claim 1, characterized in that The step of judging whether the load of the at least one group of coal-fired units is the target load based on the first output value of the coal mill, the first output value of the induced draft fan and / or the first pressure head of the induced draft fan comprises: Determine whether the first output value of the coal mill is less than a preset coal mill output value, whether the first output value of the induced draft fan is less than a preset induced draft fan output value, and whether the first pressure head of the induced draft fan is less than a preset induced draft fan pressure head; If the first output value of the coal mill is less than the preset coal mill output value, the first output value of the induced draft fan is less than the preset induced draft fan output value, and the first pressure head of the induced draft fan is less than the preset pressure head of the induced draft fan, then it is determined that the load is the target load; If the first output value of the coal mill is greater than or equal to the preset coal mill output value, the first output value of the induced draft fan is greater than or equal to the preset induced draft fan output value, or the first pressure head of the induced draft fan is greater than or equal to the preset induced draft fan pressure head, it is determined that the load is not the target load.

3. The method according to claim 1, characterized in that The calculating the first output value of at least one coal mill based on the first information of the type and quantity of coal comprises: Calculating a first boiler coal consumption amount of a boiler based on the first information on the type and quantity of coal; Based on the coal combustion amount of the first boiler, a first output value of the coal mill is calculated.

4. The method according to claim 1, characterized in that: Before calculating the first output value of the induced draft fan of at least one induced draft fan based on the first information of the type and quantity of coal, the method further includes: Detecting the oxygen content in the flue gas at the outlet and the oxygen content in the flue gas at the inlet of the air preheater in the power system; Based on the oxygen content in the outlet flue gas and the oxygen content in the inlet flue gas, the air preheater leakage rate of the air preheater is calculated.

5. The method according to claim 4, characterized in that The calculating the first output value of the induced draft fan of at least one induced draft fan based on the first information of the type and quantity of coal comprises: Calculating the mass flow rate of the at least one induced draft fan based on the air preheater leakage rate; Based on the induced draft fan mass flow rate, a first induced draft fan output value of the at least one induced draft fan at at least one temperature is calculated.

6. A boiler output calculation device, characterized in that: include: an acquisition module, used for acquiring first information of coal type and quantity of at least one group of coal-fired units in the power system, and calculating a first output value of a coal mill of at least one coal mill, a first output value of an induced draft fan of at least one induced draft fan and / or a first pressure head of the induced draft fan of the at least one induced draft fan based on the first information of coal type and quantity; A judgment module, configured to judge whether the load of the at least one group of coal-fired units is a target load based on the first output value of the coal mill, the first output value of the induced draft fan and / or the first pressure head of the induced draft fan; a first calculation module, configured to calculate an output value of a boiler in the power system based on a first output value of the coal mill, a first output value of the induced draft fan and / or a first pressure head of the induced draft fan when the load is the target load; The second calculation module is used for adjusting the first information on the type and quantity of coal to the second information on the type and quantity of coal based on the target load when the load is not the target load, and recalculating the second output value of the coal mill of the at least one coal mill, the second output value of the induced draft fan of the at least one induced draft fan and / or the second pressure head of the induced draft fan based on the second information on the type and quantity of coal, so as to calculate the output value of the boiler using the second output value of the coal mill, the second output value of the induced draft fan and / or the second pressure head of the induced draft fan.

7. The device according to claim 6, characterized in that The judging module comprises: a judgment unit, used for judging whether the first output value of the coal mill is less than a preset coal mill output value, whether the first output value of the induced draft fan is less than a preset induced draft fan output value, and whether the first pressure head of the induced draft fan is less than a preset induced draft fan pressure head; A first determination unit is configured to determine that the load is the target load when the first output value of the coal mill is less than the preset coal mill output value, the first output value of the induced draft fan is less than the preset induced draft fan output value, and the first pressure head of the induced draft fan is less than the preset pressure head of the induced draft fan; The second determination unit is used to determine that the load is not the target load when the first output value of the coal mill is greater than or equal to the preset coal mill output value, the first output value of the induced draft fan is greater than or equal to the preset induced draft fan output value, or the first pressure head of the induced draft fan is greater than or equal to the preset induced draft fan head pressure.

8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the boiler output calculation method according to any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the boiler output calculation method as described in any one of claims 1 to 5.

10. A computer program product, characterized in that It comprises a computer program, which, when executed, is used to implement the boiler output calculation method as claimed in any one of claims 1 to 5.

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