An online flue gas analysis device for coal-fired boilers of power generation units

Abstract

The present application discloses an online flue gas analysis device for a coal-fired boiler of a generator set, which relates to the field of flue gas analysis. The device comprises a flue gas detection module, a preliminary analysis module for combustion efficiency, a gas composition detection module, a heat conversion analysis module and a comprehensive analysis and evaluation module. By performing data detection and analysis on the chemical composition of the flue gas of the coal-fired boiler of a target generator set, an important data basis is provided for the combustion performance evaluation of the coal-fired boiler. At the same time, a comprehensive analysis is performed with the temperature and air pressure of the flue gas of the coal-fired boiler, which effectively improves the accuracy and effectiveness of the combustion performance evaluation of the coal-fired boiler. By respectively analyzing the heat conversion efficiency and the comprehensive combustion efficiency corresponding to the generator set and the coal-fired boiler, the accuracy of the performance evaluation of the coal-fired boiler of the target generator set is improved, thereby indirectly improving the power generation efficiency of the generator set, minimizing coal consumption and reducing power generation costs.

Description

Technical Field

[0001] The present application relates to the field of flue gas analysis, and in particular to an online flue gas analysis device for a coal-fired boiler of a power generation unit. Background Art

[0002] By monitoring the flue gas composition in real time, the combustion process can be adjusted to ensure the full combustion of the fuel, thereby improving the coal-burning efficiency of the generator set, and indirectly improving the power generation efficiency of the generator set, which helps to minimize coal consumption and reduce power generation costs.

[0003] When evaluating the performance of coal-fired boilers in power generation units, existing technologies often ignore the importance of flue gas composition analysis to performance evaluation, which reduces the accuracy and effectiveness of the performance evaluation of coal-fired boilers in power generation units. When evaluating the performance of coal-fired boilers in power generation units, existing technologies usually only conduct overall performance evaluation and cannot accurately locate faults in coal-fired boilers in power generation units, further reducing the accuracy and effectiveness of the performance evaluation of coal-fired boilers in power generation units. Summary of the invention

[0004] The object of the present invention is to provide an online flue gas analysis device for a coal-fired boiler of a power generation unit to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an online flue gas analysis device for a coal-fired boiler of a generator set, comprising:

[0006] Flue gas detection module: used to monitor the flue gas generated by the combustion of coal in the target coal-fired boiler and obtain the flue gas information corresponding to the target coal-fired boiler;

[0007] Combustion efficiency preliminary analysis module: used to conduct a comprehensive analysis based on the flue gas information corresponding to the target coal-fired boiler, and obtain the preliminary combustion efficiency influence coefficient corresponding to the unit time interval of the target coal-fired boiler;

[0008] Gas composition detection module: used to detect the gas composition of the flue gas generated by the combustion of coal in the target coal-fired boiler, and obtain the gas composition information set corresponding to the flue gas of the target coal-fired boiler;

[0009] Heat conversion analysis module: used to analyze the gas composition information set of the flue gas corresponding to the target coal-fired boiler to obtain the heat conversion evaluation result corresponding to the target generator set;

[0010] Comprehensive analysis and evaluation module: It is used to conduct a comprehensive analysis based on the preliminary combustion efficiency influence coefficient corresponding to the unit time interval of the target coal-fired boiler and the gas composition information of the flue gas corresponding to the target coal-fired boiler, so as to obtain the comprehensive combustion efficiency corresponding to the target coal-fired boiler and the comprehensive evaluation result of the coal-fired boiler of the target generator unit.

[0011] In the preferred embodiment of this scheme, the specific implementation method of the smoke detection module is as follows:

[0012] The flue gas of the target coal-fired boiler before the coal is put into use is detected by a preset gas temperature sensor and a gas pressure sensor to obtain the initial temperature and initial gas pressure of the flue gas of the target coal-fired boiler before the coal is put into use;

[0013] The flue gas generated by the target coal-fired boiler during coal combustion is monitored by the preset gas temperature sensor and gas pressure sensor to obtain the temperature change curve of the flue gas during coal combustion in the target coal-fired boiler. And gas pressure change curve ;

[0014] The initial gas temperature corresponding to the target coal-fired boiler and the temperature change curve of the flue gas when the target coal-fired boiler is burning coal are recorded as the flue gas information corresponding to the target coal-fired boiler.

[0015] In the preferred embodiment of this scheme, the specific implementation method of the combustion efficiency preliminary analysis module is as follows:

[0016] Establishing a data extraction relationship between the combustion efficiency preliminary analysis module and the database, extracting the standard coal profile model corresponding to each standard coal volume stored in the database;

[0017] The coal input status of the feed port is monitored by a preset image acquisition device at the feed port of the target coal-fired boiler, and the coal image corresponding to each coal input within a unit time interval is obtained. The coal image corresponding to each coal input is scanned in all directions by a preset contour scanner to obtain a three-dimensional model of the coal image corresponding to each coal input, and a coal contour model corresponding to each coal input is established;

[0018] Model matching is performed on the coal profile model corresponding to each coal input and the standard coal profile model corresponding to each standard coal volume to obtain the model matching degree between the coal profile model corresponding to each coal input and the standard coal profile model corresponding to each standard coal volume, the standard coal profile model with the maximum model matching degree corresponding to each coal input is screened and obtained, and the standard coal volume corresponding to the standard profile model is recorded as the coal volume of each coal input;

[0019] The total volume of coal input corresponding to the target coal-fired boiler per unit time interval is obtained by statistics, and the ideal heat energy release corresponding to the target coal-fired boiler per unit time interval is calculated based on the density of the coal and the calorific value of the coal per unit mass. ;

[0020] Obtain the volume of the combustion area of ​​the target coal-fired boiler from the database;

[0021] A combustion data set is established according to the ideal heat energy release amount corresponding to the target coal-fired boiler in a unit time interval, the volume of the combustion area, and the initial temperature and initial gas pressure of the flue gas before the coal is put into the target coal-fired boiler;

[0022] Extract the ideal temperature change curve and ideal gas pressure change curve corresponding to each combustion data set from the database, and screen and obtain the ideal temperature change curve corresponding to the target coal-fired boiler in unit time interval And ideal air pressure curve ;

[0023] By calculating the formula , calculate the first influence coefficient of combustion efficiency corresponding to the unit time interval of the target coal-fired boiler ;

[0024] By calculating the formula , calculate the second influence coefficient of combustion efficiency corresponding to the unit time interval of the target coal-fired boiler ,

[0025] By calculating the formula , calculate the initial combustion efficiency influence coefficient corresponding to the unit time interval of the target coal-fired boiler ,in is expressed as the initial time of the unit time interval, It is expressed as the end time of the unit time interval, , , They are respectively represented by the preset combustion efficiency first influence coefficient influence factor, the combustion efficiency second influence coefficient influence factor, and the preliminary combustion efficiency influence coefficient influence factor, Expressed as a natural constant.

[0026] In the preferred embodiment of this scheme, the specific implementation method of the gas composition detection module is as follows:

[0027] The flue gas about to enter the heat conversion channel is monitored by a preset detection device to obtain a gas composition information set corresponding to the flue gas, which includes the concentration of gas particles. , CO2 concentration , Carbon monoxide concentration , sulfur oxide concentration and nitrogen oxide concentration .

[0028] In the preferred embodiment of this scheme, the specific implementation method of the heat conversion analysis module is as follows:

[0029] Establish a data extraction relationship between the heat conversion analysis module and the database, extract the molar average heat capacity corresponding to each gas component information set stored in the database, and filter the molar average heat capacity corresponding to the flue gas through the gas component information set corresponding to the flue gas. ;

[0030] The mass flow rate of flue gas is obtained by the mass flow meter preset at the entrance of the heat conversion channel ;

[0031] By calculating the formula , get the total heat released by flue gas in unit time interval, where It is expressed as the temperature difference between the flue gas entering the heat conversion channel inlet and the flue gas leaving the heat conversion channel outlet. It is expressed as the preset total heat impact factor of flue gas release;

[0032] The power generation of the target power generation unit in a unit time interval is obtained through the control center of the target power generation unit, and the ideal total heat released by flue gas corresponding to each power generation stored in the database is compared and screened to obtain the ideal total heat released by flue gas corresponding to the power generation of the target power generation unit, and the heat conversion efficiency corresponding to the target power generation unit is obtained by calculating the ratio between the ideal total heat released by flue gas and the total heat released by flue gas;

[0033] Compare and analyze the thermal conversion efficiency corresponding to the target generator set with the preset thermal conversion efficiency threshold. If the thermal conversion efficiency corresponding to the target generator set is greater than the preset thermal conversion efficiency threshold, it means that the thermal conversion corresponding to the target generator set is normal. The normal thermal conversion corresponding to the target generator set is recorded as the thermal conversion evaluation result corresponding to the target generator set.

[0034] If the thermal conversion efficiency corresponding to the target generator set is less than or equal to the preset thermal conversion efficiency threshold, it means that the thermal conversion corresponding to the target generator set is abnormal, and the thermal conversion abnormality corresponding to the target generator set is recorded as the thermal conversion evaluation result corresponding to the target generator set.

[0035] In the preferred embodiment of this scheme, the specific implementation method of the comprehensive analysis and evaluation module is as follows:

[0036] Establish a data extraction relationship between the comprehensive analysis and evaluation module and the database, and extract the ideal gas composition information corresponding to the total volume of coal input of each target coal-fired boiler under the ideal combustion efficiency stored in the data;

[0037] By calculating the formula

[0038] , calculate the combustion efficiency weight influence coefficient corresponding to the target coal-fired boiler ;

[0039] By calculating the formula , calculate the comprehensive combustion efficiency corresponding to the target coal-fired boiler ,in , , , , Expressed as ideal gas particulate matter concentration, ideal carbon dioxide concentration, ideal carbon monoxide concentration, ideal sulfur oxide concentration and ideal nitrogen oxide concentration, , , It is expressed as the preset gas particulate matter concentration influence factor, carbon oxide concentration influence factor and acid gas concentration influence factor. Expressed as the preset combustion efficiency weight influence factor, Expressed as the preset comprehensive combustion efficiency influencing factor, Expressed as a natural constant;

[0040] Compare and analyze the comprehensive combustion efficiency corresponding to the target coal-fired boiler with the preset comprehensive combustion efficiency threshold. If the comprehensive combustion efficiency corresponding to the target coal-fired boiler is greater than the preset comprehensive combustion efficiency threshold, it means that the combustion performance of the target coal-fired boiler is normal, and the normal combustion performance of the target coal-fired boiler is recorded as the combustion performance evaluation result of the target coal-fired boiler. If the comprehensive combustion efficiency corresponding to the target coal-fired boiler is less than or equal to the preset comprehensive combustion efficiency threshold, it means that the combustion performance of the target coal-fired boiler is abnormal, and the abnormal combustion performance of the target coal-fired boiler is recorded as the combustion performance evaluation result of the target coal-fired boiler.

[0041] The thermal conversion evaluation result corresponding to the target power generation unit and the combustion performance evaluation result of the target coal-fired boiler are recorded together as the comprehensive evaluation result of the coal-fired boiler of the target power generation unit.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] The present invention provides important data basis for the combustion performance evaluation of coal-fired boilers by performing data detection and analysis on the chemical composition of the flue gas of the coal-fired boiler of the target generator set, and simultaneously performs a comprehensive analysis with the temperature and pressure of the flue gas of the coal-fired boiler, thereby effectively improving the accuracy and effectiveness of the combustion performance evaluation of the coal-fired boiler;

[0044] The present invention improves the accuracy of performance evaluation of the coal-fired boiler of the target generator set by analyzing the heat conversion efficiency and comprehensive combustion efficiency of the generator set and the coal-fired boiler respectively, thereby indirectly improving the power generation efficiency of the generator set, minimizing coal consumption, and reducing power generation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0046] Figure 1 It is a schematic diagram of module connection of the present invention.

[0047] Figure 2 It is a schematic diagram of the device of the present invention. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] See also Figure 1 , the present invention provides a technical solution: an online flue gas analysis device for a coal-fired boiler of a power generation unit includes a flue gas detection module, a combustion efficiency preliminary analysis module, a gas composition detection module, a heat conversion analysis module and a comprehensive analysis and evaluation module;

[0050] The smoke detection module is connected to the combustion efficiency preliminary analysis module, the combustion efficiency preliminary analysis module is connected to the comprehensive analysis and evaluation module, the gas composition detection module is connected to the heat conversion analysis module and the comprehensive analysis and evaluation module, and the heat conversion analysis module is connected to the comprehensive analysis and evaluation module.

[0051] The flue gas detection module is used to monitor the flue gas generated by the combustion of coal in the target coal-fired boiler and obtain the flue gas information corresponding to the target coal-fired boiler;

[0052] Furthermore, the specific implementation of the smoke detection module is as follows:

[0053] The flue gas of the target coal-fired boiler before the coal is put into use is detected by a preset gas temperature sensor and a gas pressure sensor to obtain the initial temperature and initial gas pressure of the flue gas of the target coal-fired boiler before the coal is put into use;

[0054] The flue gas generated by the target coal-fired boiler during coal combustion is monitored by the preset gas temperature sensor and gas pressure sensor to obtain the temperature change curve of the flue gas during coal combustion in the target coal-fired boiler. And gas pressure change curve ;

[0055] The initial gas temperature corresponding to the target coal-fired boiler and the temperature change curve of the flue gas when the target coal-fired boiler is burning coal are recorded as the flue gas information corresponding to the target coal-fired boiler.

[0056] The combustion efficiency preliminary analysis module is used to conduct a comprehensive analysis based on the flue gas information corresponding to the target coal-fired boiler, and obtain the preliminary combustion efficiency influence coefficient corresponding to the unit time interval of the target coal-fired boiler;

[0057] Furthermore, the specific implementation of the combustion efficiency preliminary analysis module is as follows:

[0058] Establishing a data extraction relationship between the combustion efficiency preliminary analysis module and the database, extracting the standard coal profile model corresponding to each standard coal volume stored in the database;

[0059] The coal input status of the feed port is monitored by a preset image acquisition device at the feed port of the target coal-fired boiler, and the coal image corresponding to each coal input within a unit time interval is obtained. The coal image corresponding to each coal input is scanned in all directions by a preset contour scanner to obtain a three-dimensional model of the coal image corresponding to each coal input, and a coal contour model corresponding to each coal input is established;

[0060] Model matching is performed on the coal profile model corresponding to each coal input and the standard coal profile model corresponding to each standard coal volume to obtain the model matching degree between the coal profile model corresponding to each coal input and the standard coal profile model corresponding to each standard coal volume, the standard coal profile model with the maximum model matching degree corresponding to each coal input is screened and obtained, and the standard coal volume corresponding to the standard profile model is recorded as the coal volume of each coal input;

[0061] The total volume of coal input corresponding to the target coal-fired boiler per unit time interval is obtained by statistics, and the ideal heat energy release corresponding to the target coal-fired boiler per unit time interval is calculated based on the density of the coal and the calorific value of the coal per unit mass. ;

[0062] Obtain the volume of the combustion area of ​​the target coal-fired boiler from the database;

[0063] A combustion data set is established according to the ideal heat energy release of the target coal-fired boiler corresponding to a unit time interval, the volume of the combustion area, and the initial temperature and initial gas pressure of the flue gas before the coal is put into the target coal-fired boiler;

[0064] Extract the ideal temperature change curve and ideal gas pressure change curve corresponding to each combustion data set from the database, and screen and obtain the ideal temperature change curve corresponding to the target coal-fired boiler in unit time interval And ideal air pressure curve ;

[0065] By calculating the formula , calculate the first influence coefficient of combustion efficiency corresponding to the unit time interval of the target coal-fired boiler ;

[0066] By calculating the formula , calculate the second influence coefficient of combustion efficiency corresponding to the unit time interval of the target coal-fired boiler ,

[0067] By calculating the formula , calculate the initial combustion efficiency influence coefficient corresponding to the unit time interval of the target coal-fired boiler ,in is expressed as the initial time of the unit time interval, It is expressed as the end time of the unit time interval, , , They are respectively represented by the preset combustion efficiency first influence coefficient influence factor, the combustion efficiency second influence coefficient influence factor, and the preliminary combustion efficiency influence coefficient influence factor, Expressed as a natural constant.

[0068] The gas composition detection module is used to detect the gas composition of the flue gas generated by the combustion of coal in the target coal-fired boiler, and obtain a gas composition information set corresponding to the flue gas of the target coal-fired boiler;

[0069] Furthermore, the specific implementation of the gas composition detection module is as follows:

[0070] The flue gas about to enter the heat conversion channel is monitored by a preset detection device to obtain a gas composition information set corresponding to the flue gas, which includes the concentration of gas particles. , CO2 concentration , Carbon monoxide concentration , sulfur oxide concentration and nitrogen oxide concentration .

[0071] The heat conversion analysis module is used to analyze the gas composition information set of the flue gas corresponding to the target coal-fired boiler to obtain the heat conversion evaluation result corresponding to the target generator set;

[0072] Furthermore, the specific implementation of the heat conversion analysis module is as follows:

[0073] Establish a data extraction relationship between the heat conversion analysis module and the database, extract the molar average heat capacity corresponding to each gas component information set stored in the database, and filter the molar average heat capacity corresponding to the flue gas through the gas component information set corresponding to the flue gas. ;

[0074] The mass flow rate of flue gas is obtained by the mass flow meter preset at the entrance of the heat conversion channel ;

[0075] By calculating the formula , get the total heat released by flue gas in unit time interval, where It is expressed as the temperature difference between the flue gas entering the heat conversion channel inlet and the flue gas leaving the heat conversion channel outlet. It is expressed as the preset total heat impact factor of flue gas release;

[0076] The power generation of the target power generation unit in a unit time interval is obtained through the control center of the target power generation unit, and the ideal total heat released by flue gas corresponding to each power generation stored in the database is compared and screened to obtain the ideal total heat released by flue gas corresponding to the power generation of the target power generation unit, and the heat conversion efficiency corresponding to the target power generation unit is obtained by calculating the ratio between the ideal total heat released by flue gas and the total heat released by flue gas;

[0077] Compare and analyze the thermal conversion efficiency corresponding to the target generator set with the preset thermal conversion efficiency threshold. If the thermal conversion efficiency corresponding to the target generator set is greater than the preset thermal conversion efficiency threshold, it means that the thermal conversion corresponding to the target generator set is normal. The normal thermal conversion corresponding to the target generator set is recorded as the thermal conversion evaluation result corresponding to the target generator set.

[0078] If the thermal conversion efficiency corresponding to the target generator set is less than or equal to the preset thermal conversion efficiency threshold, it means that the thermal conversion corresponding to the target generator set is abnormal, and the thermal conversion abnormality corresponding to the target generator set is recorded as the thermal conversion evaluation result corresponding to the target generator set.

[0079] The comprehensive analysis and evaluation module is used to conduct a comprehensive analysis based on the preliminary combustion efficiency influence coefficient corresponding to the unit time interval of the target coal-fired boiler and the gas composition information of the flue gas corresponding to the target coal-fired boiler, so as to obtain the comprehensive combustion efficiency corresponding to the target coal-fired boiler and the comprehensive evaluation result of the coal-fired boiler of the target generator unit.

[0080] Furthermore, the specific implementation of the comprehensive analysis and evaluation module is as follows:

[0081] Establish a data extraction relationship between the comprehensive analysis and evaluation module and the database, and extract the ideal gas composition information corresponding to the total volume of coal input of each target coal-fired boiler under the ideal combustion efficiency stored in the data;

[0082] By calculating the formula

[0083] , calculate the combustion efficiency weight influence coefficient corresponding to the target coal-fired boiler ;

[0084] By calculating the formula , calculate the comprehensive combustion efficiency corresponding to the target coal-fired boiler ,in , , , , Expressed as ideal gas particulate matter concentration, ideal carbon dioxide concentration, ideal carbon monoxide concentration, ideal sulfur oxide concentration and ideal nitrogen oxide concentration, , , It is expressed as the preset gas particulate matter concentration influence factor, carbon oxide concentration influence factor and acid gas concentration influence factor. Expressed as the preset combustion efficiency weight influence factor, Expressed as the preset comprehensive combustion efficiency influencing factor, Expressed as a natural constant;

[0085] Compare and analyze the comprehensive combustion efficiency corresponding to the target coal-fired boiler with the preset comprehensive combustion efficiency threshold. If the comprehensive combustion efficiency corresponding to the target coal-fired boiler is greater than the preset comprehensive combustion efficiency threshold, it means that the combustion performance of the target coal-fired boiler is normal, and the normal combustion performance of the target coal-fired boiler is recorded as the combustion performance evaluation result of the target coal-fired boiler. If the comprehensive combustion efficiency corresponding to the target coal-fired boiler is less than or equal to the preset comprehensive combustion efficiency threshold, it means that the combustion performance of the target coal-fired boiler is abnormal, and the abnormal combustion performance of the target coal-fired boiler is recorded as the combustion performance evaluation result of the target coal-fired boiler.

[0086] The thermal conversion evaluation result corresponding to the target power generation unit and the combustion performance evaluation result of the target coal-fired boiler are recorded together as the comprehensive evaluation result of the coal-fired boiler of the target power generation unit.

[0087] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An online flue gas analysis device for a coal-fired boiler of a generator set, characterized in that: include: Flue gas detection module: used to monitor the flue gas generated by the combustion of coal in the target coal-fired boiler and obtain the flue gas information corresponding to the target coal-fired boiler; Combustion efficiency preliminary analysis module: used to conduct a comprehensive analysis based on the flue gas information corresponding to the target coal-fired boiler, and obtain the preliminary combustion efficiency influence coefficient corresponding to the unit time interval of the target coal-fired boiler; Gas composition detection module: used to detect the gas composition of the flue gas generated by the combustion of coal in the target coal-fired boiler, and obtain the gas composition information set corresponding to the flue gas of the target coal-fired boiler; Heat conversion analysis module: used to analyze the gas composition information set of the flue gas corresponding to the target coal-fired boiler to obtain the heat conversion evaluation result corresponding to the target generator set; Comprehensive analysis and evaluation module: It is used to conduct a comprehensive analysis based on the preliminary combustion efficiency influence coefficient corresponding to the unit time interval of the target coal-fired boiler and the gas composition information of the flue gas corresponding to the target coal-fired boiler, so as to obtain the comprehensive combustion efficiency corresponding to the target coal-fired boiler and the comprehensive evaluation result of the coal-fired boiler of the target generator unit.

2. The on-line flue gas analysis device for a coal-fired boiler of a power generation unit according to claim 1, characterized in that: The specific implementation of the smoke detection module is as follows: The flue gas of the target coal-fired boiler before the coal is put into use is detected by a preset gas temperature sensor and a gas pressure sensor to obtain the initial temperature and initial gas pressure of the flue gas of the target coal-fired boiler before the coal is put into use; The flue gas generated by the target coal-fired boiler during coal combustion is monitored by the preset gas temperature sensor and gas pressure sensor to obtain the temperature change curve of the flue gas during coal combustion in the target coal-fired boiler. And gas pressure change curve ; The initial gas temperature corresponding to the target coal-fired boiler and the temperature change curve of the flue gas when the target coal-fired boiler is burning coal are recorded as the flue gas information corresponding to the target coal-fired boiler.

3. The on-line flue gas analysis device for a coal-fired boiler of a power generation unit according to claim 2, characterized in that: The specific implementation method of the combustion efficiency preliminary analysis module is as follows: Establishing a data extraction relationship between the combustion efficiency preliminary analysis module and the database, extracting the standard coal profile model corresponding to each standard coal volume stored in the database; The coal input status of the feed port is monitored by a preset image acquisition device at the feed port of the target coal-fired boiler, and the coal image corresponding to each coal input within a unit time interval is obtained. The coal image corresponding to each coal input is scanned in all directions by a preset contour scanner to obtain a three-dimensional model of the coal image corresponding to each coal input, and a coal contour model corresponding to each coal input is established; Model matching is performed on the coal profile model corresponding to each coal input and the standard coal profile model corresponding to each standard coal volume to obtain the model matching degree between the coal profile model corresponding to each coal input and the standard coal profile model corresponding to each standard coal volume, the standard coal profile model with the maximum model matching degree corresponding to each coal input is screened and obtained, and the standard coal volume corresponding to the standard profile model is recorded as the coal volume of each coal input; The total volume of coal input corresponding to the target coal-fired boiler per unit time interval is obtained by statistics, and the ideal heat energy release corresponding to the target coal-fired boiler per unit time interval is calculated based on the density of the coal and the calorific value of the coal per unit mass. ; Obtain the volume of the combustion area of ​​the target coal-fired boiler from the database; A combustion data set is established according to the ideal heat energy release amount corresponding to the target coal-fired boiler in a unit time interval, the volume of the combustion area, and the initial temperature and initial gas pressure of the flue gas before the coal is put into the target coal-fired boiler; Extract the ideal temperature change curve and ideal gas pressure change curve corresponding to each combustion data set from the database, and screen and obtain the ideal temperature change curve corresponding to the target coal-fired boiler in unit time interval And ideal air pressure curve ; By calculating the formula , calculate the first influence coefficient of combustion efficiency corresponding to the unit time interval of the target coal-fired boiler ; By calculating the formula , calculate the second influence coefficient of combustion efficiency corresponding to the unit time interval of the target coal-fired boiler , By calculating the formula , calculate the initial combustion efficiency influence coefficient corresponding to the unit time interval of the target coal-fired boiler ,in is expressed as the initial time of the unit time interval, It is expressed as the end time of the unit time interval, , , They are respectively represented by the preset combustion efficiency first influence coefficient influence factor, the combustion efficiency second influence coefficient influence factor, and the preliminary combustion efficiency influence coefficient influence factor, Expressed as a natural constant.

4. The on-line flue gas analysis device for a coal-fired boiler of a power generation unit according to claim 2, characterized in that: The specific implementation of the gas composition detection module is as follows: The flue gas about to enter the heat conversion channel is monitored by a preset detection device to obtain a gas composition information set corresponding to the flue gas, which includes the concentration of gas particles. , CO2 concentration , Carbon monoxide concentration , sulfur oxide concentration and nitrogen oxide concentration .

5. The on-line flue gas analysis device for a coal-fired boiler of a power generation unit according to claim 4, characterized in that: The specific implementation method of the heat conversion analysis module is as follows: Establish a data extraction relationship between the heat conversion analysis module and the database, extract the molar average heat capacity corresponding to each gas component information set stored in the database, and filter the molar average heat capacity corresponding to the flue gas through the gas component information set corresponding to the flue gas ; The mass flow rate of flue gas is obtained by the mass flow meter preset at the entrance of the heat conversion channel ; By calculating the formula , get the total heat released by flue gas in unit time interval, where It is expressed as the temperature difference between the flue gas entering the heat conversion channel inlet and the flue gas leaving the heat conversion channel outlet. It is expressed as the preset total heat impact factor of flue gas release; The power generation of the target power generation unit in a unit time interval is obtained through the control center of the target power generation unit, and the ideal total heat released by flue gas corresponding to each power generation stored in the database is compared and screened to obtain the ideal total heat released by flue gas corresponding to the power generation of the target power generation unit, and the heat conversion efficiency corresponding to the target power generation unit is obtained by calculating the ratio between the ideal total heat released by flue gas and the total heat released by flue gas; Compare and analyze the thermal conversion efficiency corresponding to the target generator set with the preset thermal conversion efficiency threshold. If the thermal conversion efficiency corresponding to the target generator set is greater than the preset thermal conversion efficiency threshold, it means that the thermal conversion corresponding to the target generator set is normal. The normal thermal conversion corresponding to the target generator set is recorded as the thermal conversion evaluation result corresponding to the target generator set. If the thermal conversion efficiency corresponding to the target generator set is less than or equal to the preset thermal conversion efficiency threshold, it means that the thermal conversion corresponding to the target generator set is abnormal, and the thermal conversion abnormality corresponding to the target generator set is recorded as the thermal conversion evaluation result corresponding to the target generator set.

6. The on-line flue gas analysis device for a coal-fired boiler of a power generation unit according to claim 4, characterized in that: The specific implementation method of the comprehensive analysis and evaluation module is as follows: Establish a data extraction relationship between the comprehensive analysis and evaluation module and the database, and extract the ideal gas composition information corresponding to the total volume of coal input of each target coal-fired boiler under the ideal combustion efficiency stored in the data; By calculating the formula , calculate the combustion efficiency weight influence coefficient corresponding to the target coal-fired boiler ; By calculating the formula , calculate the comprehensive combustion efficiency corresponding to the target coal-fired boiler ,in , , , , Expressed as ideal gas particulate matter concentration, ideal carbon dioxide concentration, ideal carbon monoxide concentration, ideal sulfur oxide concentration and ideal nitrogen oxide concentration, , , It is expressed as the preset gas particulate matter concentration influence factor, carbon oxide concentration influence factor and acid gas concentration influence factor. Expressed as the preset combustion efficiency weight influence factor, Expressed as the preset comprehensive combustion efficiency influencing factor, Expressed as a natural constant; Compare and analyze the comprehensive combustion efficiency corresponding to the target coal-fired boiler with the preset comprehensive combustion efficiency threshold. If the comprehensive combustion efficiency corresponding to the target coal-fired boiler is greater than the preset comprehensive combustion efficiency threshold, it means that the combustion performance of the target coal-fired boiler is normal, and the normal combustion performance of the target coal-fired boiler is recorded as the combustion performance evaluation result of the target coal-fired boiler. If the comprehensive combustion efficiency corresponding to the target coal-fired boiler is less than or equal to the preset comprehensive combustion efficiency threshold, it means that the combustion performance of the target coal-fired boiler is abnormal, and the abnormal combustion performance of the target coal-fired boiler is recorded as the combustion performance evaluation result of the target coal-fired boiler. The thermal conversion evaluation result corresponding to the target power generation unit and the combustion performance evaluation result of the target coal-fired boiler are recorded together as the comprehensive evaluation result of the coal-fired boiler of the target power generation unit.

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