Energy-saving combustion control system and method for boiler

Abstract

The invention relates to the technical field of thermal power generation, and discloses a boiler energy-saving combustion control system, which comprises a data acquisition module for detecting to-be-controlled parameters in a boiler in a combustion process; the strategy generation module is used for selecting the initial opening degree of the air volume adjusting valve according to the to-be-controlled parameters and a preset strategy making rule; the strategy optimization module is used for optimizing the initial opening degree of the air volume adjusting valve according to the to-be-controlled parameters to obtain the optimized opening degree of the air volume adjusting valve; and the strategy correction module is used for judging whether the opening degree of the optimized air volume adjusting valve needs to be corrected or not according to the to-be-controlled parameters. According to the method, firstly, the initial opening degree of the air volume adjusting valve is quickly confirmed according to the CO content in the boiler, then the opening degree of the air volume adjusting valve is optimized according to smoke, finally, correction is conducted according to CO in the boiler, oxygen needed by boiler combustion is accurately provided, and fuel consumption is more effectively saved by improving the combustion efficiency of fuel.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation, and in particular to a boiler energy-saving combustion control system and method. Background Art

[0002] Coal has long occupied an important position in the global energy structure. According to data from the International Energy Agency (IEA), in the past few decades, coal has accounted for more than 25% of global primary energy consumption. In China, coal has an even more prominent position, accounting for more than 50% of primary energy consumption for a long time. This energy structure determines that thermal power plants that use coal as the main fuel have an important position in power supply, and boiler combustion technology is the key to efficient use of coal in thermal power plants. In order to meet the growing demand for electricity, thermal power plants need to continuously improve power generation efficiency, and advanced boiler combustion technology is one of the core links to improve power generation efficiency.

[0003] However, the inventors of this application found that the above technology has at least the following technical problems in the process of implementing the technical solution of the invention in the embodiment of this application: During the combustion process of the boiler, the air volume cannot be adjusted in a timely and dynamic manner according to the fuel status, resulting in incomplete fuel combustion and low boiler combustion efficiency, which leads to a large amount of coal resources being wasted over time. Summary of the invention

[0004] The embodiment of the present invention provides a boiler energy-saving combustion control system and method, which are used to solve the technical problem of boiler combustion not being energy-saving due to excessive waste of coal resources in the prior art.

[0005] In order to achieve the above object, the present invention provides a boiler energy-saving combustion control system, comprising: The data acquisition module is used to detect the parameters to be controlled inside the boiler during the combustion process. The parameters to be controlled include the CO content in the boiler, the CO content in the flue gas, and the CO 2 Content, O in flue gas 2 content; A strategy generation module, used for selecting the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled and the preset strategy formulation rules; A strategy optimization module, used to optimize the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled, so as to obtain an optimized opening and closing degree of the air volume regulating valve; The strategy correction module is used to determine whether the opening and closing degree of the optimized air volume regulating valve needs to be corrected according to the parameters to be controlled.

[0006] Furthermore, the strategy generation module is used to select the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled and the preset strategy formulation rules, and also includes: Presetting a CO first threshold, a CO second threshold, and a CO third threshold, wherein the CO first threshold is smaller than the CO second threshold, and the CO second threshold is smaller than the CO third threshold; Presetting a first preset opening and closing degree, a second preset opening and closing degree, a third preset opening and closing degree, and a fourth preset opening and closing degree of the air volume regulating valve; Get the current CO content in the boiler; If the CO content in the current boiler is less than the first CO threshold, the first preset opening degree of the air volume regulating valve is selected as the initial opening degree of the air volume regulating valve; If the CO content in the current boiler is greater than or equal to the first CO threshold, and the CO content in the current flue gas is less than the second CO threshold, the second preset opening degree of the air volume regulating valve is selected as the initial opening degree of the air volume regulating valve; If the CO content in the current boiler is greater than or equal to the CO second threshold value, and the CO content in the current flue gas is less than the CO third threshold value, the third preset opening degree of the air volume regulating valve is selected as the initial opening degree of the air volume regulating valve; If the CO content in the current boiler is greater than or equal to the third CO threshold, the fourth preset opening degree of the air volume regulating valve is selected as the initial opening degree of the air volume regulating valve.

[0007] Furthermore, the strategy optimization module is used to optimize the initial opening and closing degree of the air volume regulating valve according to the parameter to be controlled, and further includes: Obtain the CO content in flue gas and the CO in flue gas at multiple times 2 content; The CO content in the flue gas and the CO in the flue gas at the multiple moments 2 Pretreatment of content; Determine the CO content in the flue gas to be controlled according to different weights preset at multiple moments and the CO content in the flue gas at multiple moments after preprocessing; According to the different weights preset at multiple moments and the CO in the flue gas at multiple moments after preprocessing 2 Determine the content of CO in the flue gas to be controlled 2 content.

[0008] Furthermore, the strategy optimization module is used to optimize the initial opening and closing degree of the air volume regulating valve according to the parameter to be controlled, and further includes: According to the CO content in the flue gas to be controlled, the CO 2 The content of CO in the flue gas to be controlled is obtained by 2 Volume fraction, and calculate the air distribution volume: ; in, To match the air volume, It is an empirical coefficient and can be adjusted according to historical data. is the volume fraction of CO in the flue gas to be controlled, CO in the flue gas to be controlled 2 Volume fraction, The theoretical air volume; The opening and closing degree characteristic curve of the air volume regulating valve is obtained, and the ideal opening and closing degree of the air volume regulating valve is determined according to the opening and closing degree characteristic curve of the air volume regulating valve and the air distribution volume.

[0009] Furthermore, the strategy optimization module is used to optimize the initial opening and closing degree of the air volume regulating valve according to the parameter to be controlled, and further includes: Preset deviation thresholds; Calculating an optimized deviation between the ideal opening and closing degree of the air volume regulating valve and the initial opening and closing degree of the air volume regulating valve, and optimizing the initial opening and closing degree of the air volume regulating valve according to the optimized deviation; If the optimized deviation is less than the deviation threshold, maintaining the initial opening and closing degree of the air volume regulating valve as the optimized opening and closing degree of the air volume regulating valve; If the optimized deviation is greater than or equal to the deviation threshold, the ideal opening and closing degree of the air volume regulating valve is set as the optimized opening and closing degree of the air volume regulating valve.

[0010] Furthermore, the strategy correction module is used to determine whether the optimized air volume control valve opening degree needs to be corrected according to the parameter to be controlled, and further includes: Get O in the smoke at multiple times 2 content, and calculate the O content in the flue gas at all times 2 O content in flue gas 2 Content mean; Preset the first O 2 Threshold, Second O 2 Threshold, the first O 2 The threshold is greater than the second O 2 Threshold value; If the flue gas contains O 2 The average content is greater than or equal to the first O 2 When the optimized air volume regulating valve opening degree reaches the threshold, it is determined that a first correction needs to be performed on the optimized air volume regulating valve opening degree; If the flue gas contains O 2 The average content is less than or equal to the second O 2 When the optimized air volume regulating valve opening degree reaches the threshold, it is determined that a second correction needs to be performed on the optimized air volume regulating valve opening degree; If the flue gas contains O 2 The average content is greater than the second O2 threshold, and the smoke contains O 2 The average content is less than the first O 2 When the optimized air volume control valve opening degree does not meet the threshold, it is determined that there is no need to correct the optimized air volume control valve opening degree.

[0011] Furthermore, the strategy correction module is used to determine whether the optimized air volume control valve opening degree needs to be corrected according to the parameter to be controlled, and further includes: When the flue gas contains O 2 The average content is greater than or equal to the first O 2 When the threshold is reached, the O 2 The content is filtered to remove all the 2 Threshold of O in smoke 2 content; Calculate the O in each of the flue gases after filtering respectively. 2 The content of the first O 2 The difference between the thresholds and calculate O 2 Deviation from the mean; The O 2 The deviation from the mean is the O 2 The content of the first O 2 The average of the differences between the thresholds; According to the O 2 The first correction is performed on the opening and closing degree of the optimized air volume regulating valve according to the deviation from the mean value and the preset adjustment ratio.

[0012] Furthermore, the strategy correction module is used to determine whether the optimized air volume control valve opening degree needs to be corrected according to the parameter to be controlled, and further includes: When the flue gas contains O 2 The average content is less than or equal to the second O 2 When the threshold is reached, the CO content in the boiler corresponding to the multiple moments is obtained; Pre-set CO correction threshold in boiler; Normalizing the CO contents in the boilers at the multiple moments, and calculating a first CO difference, wherein the first CO difference is a difference between a maximum CO content in the boiler and a minimum CO content in the boiler after the normalization; Calculating a plurality of CO second difference values ​​according to the normalized CO content in the boiler and the CO first difference value, wherein the plurality of CO second difference values ​​are respectively the difference between each normalized CO content in the boiler and the CO first difference value; The second correction coefficient is calculated according to the CO first difference and the CO second difference: ; Where n is the second correction coefficient, , is the weight, which can be adjusted according to historical data, y is the number of CO second differences, is the second difference of the i-th CO, is the mean of all CO second differences, f is the CO first difference, To adjust the coefficient, it can be adjusted based on historical data; A second correction is performed on the optimized opening and closing degree of the air volume regulating valve according to the second correction coefficient, and the opening and closing degree of the air volume regulating valve after the second correction is equal to n times the optimized opening and closing degree of the air volume regulating valve.

[0013] Furthermore, the boiler energy-saving combustion control system also includes a monitoring module: The monitoring module is used to generate a boiler combustion operation image according to the parameters to be controlled, and to determine whether to issue a boiler operation alarm according to the parameters to be controlled.

[0014] In order to achieve the above object, the present invention also provides a boiler energy-saving combustion control method, comprising: Detect the parameters to be controlled inside the boiler during the combustion process, including the CO content in the boiler, the CO content in the flue gas, and the CO 2 Content, O in flue gas 2 content; Selecting the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled and the preset strategy; Optimizing the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled to obtain an optimized opening and closing degree of the air volume regulating valve; It is determined whether the optimized air volume regulating valve opening degree needs to be corrected according to the parameter to be controlled.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a boiler energy-saving combustion control system and method, which can quickly determine the initial opening and closing degree of the air volume regulating valve according to the CO content in the boiler, so as to avoid untimely adjustment caused by a large opening and closing degree of the subsequent air volume regulating valve, and then quickly determine the initial opening and closing degree of the air volume regulating valve according to the CO content in the flue gas and the CO content in the flue gas. 2 The initial opening and closing degree of the air volume regulating valve is optimized to prevent unreasonable selection of the initial opening and closing degree of the air volume regulating valve. 2 The opening and closing degree of the air volume regulating valve is corrected again according to the CO content in the boiler, which not only ensures that there is sufficient oxygen in the boiler for fuel combustion, but also avoids the loss of heat in the boiler due to excessive air supply, thereby achieving efficient use of fuel, reducing energy waste, and making the boiler more energy-efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A schematic diagram of the structure of a boiler energy-saving combustion control system according to an embodiment of the present invention is shown; Figure 2 A schematic flow chart of a boiler energy-saving combustion control method in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0017] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0019] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0020] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.

[0022] like Figure 1As shown, an embodiment of the present invention discloses a boiler energy-saving combustion control system, comprising: The data acquisition module is used to detect the parameters to be controlled inside the boiler during the combustion process. The parameters to be controlled include the CO content in the boiler, the CO content in the flue gas, and the CO 2 Content, O in flue gas 2 content; A strategy generation module, used to select the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled and the preset strategy formulation rules; A strategy optimization module is used to optimize the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled, so as to obtain the optimized opening and closing degree of the air volume regulating valve; The strategy correction module is used to determine whether the opening and closing degree of the optimized air volume control valve needs to be corrected according to the parameters to be controlled.

[0023] In this embodiment, the air volume in the boiler is controlled according to the opening and closing degree of the air volume regulating valve to provide the required oxygen for the combustion of fuel in the boiler.

[0024] In some embodiments of the present application, the strategy generation module is used to select the initial opening and closing degree of the air volume control valve according to the parameters to be controlled and the preset strategy formulation rules, and also includes: A CO first threshold, a CO second threshold, and a CO third threshold are preset, the CO first threshold is smaller than the CO second threshold, and the CO second threshold is smaller than the CO third threshold; Presetting a first preset opening and closing degree, a second preset opening and closing degree, a third preset opening and closing degree, and a fourth preset opening and closing degree of the air volume regulating valve; Get the current CO content in the boiler; If the CO content in the current boiler is less than the first CO threshold, the first preset opening degree of the air volume regulating valve is selected as the initial opening degree of the air volume regulating valve; If the current CO content in the boiler is greater than or equal to the first CO threshold, and the current CO content in the flue gas is less than the second CO threshold, the second preset opening degree of the air volume regulating valve is selected as the initial opening degree of the air volume regulating valve; If the current CO content in the boiler is greater than or equal to the second CO threshold, and the current CO content in the flue gas is less than the third CO threshold, the third preset opening degree of the air volume regulating valve is selected as the initial opening degree of the air volume regulating valve; If the CO content in the current boiler is greater than or equal to the third CO threshold, the fourth preset opening and closing degree of the air volume regulating valve is selected as the initial opening and closing degree of the air volume regulating valve.

[0025] In this embodiment, the first preset opening and closing degree, the second preset opening and closing degree, the third preset opening and closing degree and the fourth preset opening and closing degree of the air volume regulating valve increase in sequence.

[0026] The beneficial effect of the above technical solution is: the initial opening and closing degree of the air volume regulating valve is quickly selected according to the CO content in the boiler, so as to realize the rapid replenishment of oxygen in the boiler.

[0027] In some embodiments of the present application, the strategy optimization module is used to optimize the initial opening and closing degree of the air volume control valve according to the parameters to be controlled, and further includes: Obtain the CO content in flue gas and the CO in flue gas at multiple times 2 content; The CO content in flue gas and the CO 2 Pretreatment of content; Determine the CO content in the flue gas to be controlled according to different weights preset at multiple moments and the CO content in the flue gas at multiple moments after preprocessing; According to the different weights preset at multiple moments and the CO in the flue gas at multiple moments after preprocessing 2 Determine the content of CO in the flue gas to be controlled 2 content.

[0028] In this embodiment, the strategy optimization module is used to optimize the initial opening and closing degree of the air volume control valve according to the parameters to be controlled, and also includes: According to the CO content in the flue gas to be controlled, the CO 2 The content of CO in the flue gas to be controlled is obtained by 2 Volume fraction, and calculate the air distribution volume: ; in, To match the air volume, It is an empirical coefficient and can be adjusted according to historical data. is the volume fraction of CO in the flue gas to be controlled, CO in the flue gas to be controlled 2 Volume fraction, The theoretical air volume; Obtain the opening and closing degree characteristic curve of the air volume control valve, and determine the ideal opening and closing degree of the air volume control valve according to the opening and closing degree characteristic curve of the air volume control valve and the air volume.

[0029] In this embodiment, the theoretical air volume can be calculated through data such as fuel analysis. The air volume regulating valve opening and closing characteristic curve, that is, the relationship between the opening and closing degree of the air volume regulating valve and the air volume, can be obtained by drawing historical data or by referring to technical information provided by the air volume regulating valve manufacturer.

[0030] In this embodiment, the strategy optimization module is used to optimize the initial opening and closing degree of the air volume control valve according to the parameters to be controlled, and also includes: Preset deviation thresholds; Calculate the optimal deviation between the ideal opening and closing degree of the air volume regulating valve and the initial opening and closing degree of the air volume regulating valve, and optimize the initial opening and closing degree of the air volume regulating valve according to the optimal deviation; If the optimized deviation is less than the deviation threshold, the initial opening and closing degree of the air volume regulating valve is maintained as the optimized opening and closing degree of the air volume regulating valve; If the optimized deviation is greater than or equal to the deviation threshold, the ideal opening and closing degree of the air volume regulating valve is set as the optimized opening and closing degree of the air volume regulating valve.

[0031] In this embodiment, the optimized deviation is the absolute value of the difference between the ideal opening and closing degree of the air volume regulating valve and the initial opening and closing degree of the air volume regulating valve.

[0032] The beneficial effect of the above technical solution is: the opening and closing degree of the air volume regulating valve is optimized according to multiple data in the flue gas generated by combustion, so as to ensure that the fuel in the boiler can be fully burned.

[0033] In some embodiments of the present application, the strategy correction module is used to determine whether the optimized air volume control valve opening degree needs to be corrected according to the parameters to be controlled, and further includes: Get O in the smoke at multiple times 2 content, and calculate the O content in the flue gas at all times 2 O content in flue gas 2 Content mean; Preset the first O 2 Threshold, second O 2 Threshold, first O 2 The threshold is greater than the second 2 Threshold value; If the smoke contains O 2 The average content is greater than or equal to the first O 2 When the optimized air volume regulating valve opening degree reaches the threshold, it is determined that a first correction needs to be made to the optimized air volume regulating valve opening degree; If the smoke contains O 2 The average content is less than or equal to the second O 2 When the optimized air volume regulating valve opening degree reaches the threshold, it is determined that a second correction is required; If the smoke contains O 2 The average content is greater than the second O 2 Threshold value, and O in smoke 2 The average content is less than the first O 2 When the optimized air volume control valve opening and closing degree does not need to be corrected, it is determined that the optimized air volume control valve opening and closing degree does not need to be corrected.

[0034] In this embodiment, the strategy correction module is used to determine whether the optimized air volume control valve opening and closing degree needs to be corrected according to the parameters to be controlled, and also includes: When O in smoke 2 The average content is greater than or equal to the first O2 When the threshold is reached, the O 2 The content is filtered and all the 2 Threshold of O in smoke 2 content; Calculate the O in each filtered flue gas 2 Content and first O 2 The difference between the thresholds and calculate O 2 Deviation from the mean; O 2 The deviation from the mean is the O 2 Content and first O 2 The average of the differences between the thresholds; According to O 2 The deviation from the mean and the preset adjustment ratio are used to make a first correction to the opening and closing degree of the optimized air volume control valve.

[0035] In this embodiment, it is preset that 2 Deviation from mean value - preset adjustment ratio mapping table, each O 2 Deviation from the mean is O 2 There is a unique corresponding preset adjustment ratio coefficient in the deviation mean-preset adjustment ratio mapping table. 2 Deviation from the mean is O 2 When the corresponding preset adjustment ratio coefficient in the deviation mean-preset adjustment ratio mapping table is a, the opening and closing degree of the air volume control valve after the first correction is equal to a times the opening and closing degree of the optimized air volume control valve.

[0036] In this embodiment, the strategy correction module is used to determine whether the optimized air volume control valve opening and closing degree needs to be corrected according to the parameters to be controlled, and also includes: When O in smoke 2 The average content is less than or equal to the second O 2 When the threshold is reached, the CO content in the boiler corresponding to multiple moments is obtained; Pre-set CO correction threshold in boiler; Normalizing the CO content in the boilers at multiple moments, and calculating a first CO difference, where the first CO difference is a difference between a maximum CO content in the boiler and a minimum CO content in the boiler after the normalization; Calculating a plurality of CO second difference values ​​according to the normalized CO content in the boiler and the CO first difference value, wherein the plurality of CO second difference values ​​are respectively the difference between the CO content in each normalized boiler and the CO first difference value; Calculate the second correction coefficient based on the CO first difference and CO second difference: ; Where n is the second correction coefficient, , is the weight, which can be adjusted according to historical data, y is the number of CO second differences, is the second difference of the i-th CO, is the mean of all CO second differences, f is the CO first difference, To adjust the coefficient, it can be adjusted based on historical data; A second correction is performed on the optimized opening and closing degree of the air volume regulating valve according to the second correction coefficient, and the opening and closing degree of the air volume regulating valve after the second correction is equal to n times the optimized opening and closing degree of the air volume regulating valve.

[0037] In this embodiment, obtaining the CO content in the boiler corresponding to multiple moments is to obtain the CO content in the flue gas at multiple moments. 2 The content is at the same time.

[0038] The beneficial effects of the above technical solution are: according to the O 2 The opening and closing degree of the air volume regulating valve is corrected according to the content, ensuring sufficient oxygen while avoiding excessive air volume that takes away heat from the boiler, improving the fuel combustion efficiency inside the boiler and preventing waste of resources caused by incomplete combustion of the fuel.

[0039] In some embodiments of the present application, the boiler energy-saving combustion control system further includes a monitoring module: The monitoring module is used to generate a boiler combustion operation image according to the parameters to be controlled, and to determine whether to issue a boiler operation alarm according to the parameters to be controlled.

[0040] In this embodiment, if the CO content in the boiler is too high, an alarm for oxygen deficiency in the boiler's internal combustion is issued; if the CO content in the flue gas is too high, an alarm for excessive CO in the flue gas is issued; if the CO content in the flue gas is too high, an alarm for excessive CO in the flue gas is issued. 2 When the content is too high, an alarm for excessive air volume will be issued.

[0041] The beneficial effect of the above technical solution is that the operating personnel can timely understand the boiler combustion status through the monitoring module.

[0042] In order to further explain the technical idea of ​​the present invention, the technical solution of the present invention is now described in combination with specific application scenarios.

[0043] Correspondingly, such as Figure 2 As shown, the present application also provides a boiler energy-saving combustion control method, comprising: S110, detecting the parameters to be controlled inside the boiler during the combustion process, the parameters to be controlled include the CO content in the boiler, the CO content in the flue gas, and the CO 2 Content, O in flue gas 2 content; S120, selecting the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled and the preset strategy; S130, optimizing the initial opening and closing degree of the air volume regulating valve according to the parameter to be controlled, and obtaining an optimized opening and closing degree of the air volume regulating valve; S140: Determine whether the optimized air volume regulating valve opening degree needs to be corrected according to the parameters to be controlled.

[0044] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0045] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention may be used in combination with each other in any manner, and the fact that these combinations are not fully described in this specification is only for the sake of omitting space and saving resources.

[0046] Those skilled in the art can understand that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A boiler energy-saving combustion control system, characterized in that: include: A data acquisition module is used to detect the parameters to be controlled inside the boiler during the combustion process, wherein the parameters to be controlled include the CO content in the boiler, the CO content in the flue gas, the CO2 content in the flue gas, and the O2 content in the flue gas; A strategy generation module, used for selecting the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled and the preset strategy formulation rules; A strategy optimization module, used to optimize the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled, so as to obtain an optimized opening and closing degree of the air volume regulating valve; The strategy correction module is used to determine whether the opening and closing degree of the optimized air volume regulating valve needs to be corrected according to the parameters to be controlled.

2. A boiler energy-saving combustion control system according to claim 1, characterized in that: The strategy generation module is used to select the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled and the preset strategy formulation rules, and also includes: Presetting a CO first threshold, a CO second threshold, and a CO third threshold, wherein the CO first threshold is smaller than the CO second threshold, and the CO second threshold is smaller than the CO third threshold; Presetting a first preset opening and closing degree, a second preset opening and closing degree, a third preset opening and closing degree, and a fourth preset opening and closing degree of the air volume regulating valve; Get the current CO content in the boiler; If the CO content in the current boiler is less than the first CO threshold, the first preset opening degree of the air volume regulating valve is selected as the initial opening degree of the air volume regulating valve; If the CO content in the current boiler is greater than or equal to the first CO threshold, and the CO content in the current flue gas is less than the second CO threshold, the second preset opening degree of the air volume regulating valve is selected as the initial opening degree of the air volume regulating valve; If the CO content in the current boiler is greater than or equal to the CO second threshold value, and the CO content in the current flue gas is less than the CO third threshold value, the third preset opening degree of the air volume regulating valve is selected as the initial opening degree of the air volume regulating valve; If the CO content in the current boiler is greater than or equal to the third CO threshold, the fourth preset opening degree of the air volume regulating valve is selected as the initial opening degree of the air volume regulating valve.

3. A boiler energy-saving combustion control system according to claim 1, characterized in that: The strategy optimization module is used to optimize the initial opening and closing degree of the air volume regulating valve according to the parameter to be controlled, and further includes: Obtain the CO content and CO2 content in the flue gas at multiple times; Preprocessing the CO content and CO2 content in the flue gas at the multiple moments; Determine the CO content in the flue gas to be controlled according to different weights preset at multiple moments and the CO content in the flue gas at multiple moments after preprocessing; The CO2 content in the flue gas to be controlled is determined according to different weights preset at multiple moments and the CO2 content in the flue gas at multiple moments after preprocessing.

4. A boiler energy-saving combustion control system according to claim 3, characterized in that: The strategy optimization module is used to optimize the initial opening and closing degree of the air volume regulating valve according to the parameter to be controlled, and further includes: According to the CO content in the flue gas to be controlled and the CO2 content in the flue gas to be controlled, the CO volume fraction in the flue gas to be controlled and the CO2 volume fraction in the flue gas to be controlled are obtained, and the air distribution volume is calculated: ; in, To match the air volume, It is an empirical coefficient and can be adjusted according to historical data. is the volume fraction of CO in the flue gas to be controlled, is the volume fraction of CO2 in the flue gas to be controlled, The theoretical air volume; The opening and closing degree characteristic curve of the air volume regulating valve is obtained, and the ideal opening and closing degree of the air volume regulating valve is determined according to the opening and closing degree characteristic curve of the air volume regulating valve and the air distribution volume.

5. A boiler energy-saving combustion control system according to claim 4, characterized in that: The strategy optimization module is used to optimize the initial opening and closing degree of the air volume regulating valve according to the parameter to be controlled, and further includes: Preset deviation thresholds; Calculating an optimized deviation between the ideal opening and closing degree of the air volume regulating valve and the initial opening and closing degree of the air volume regulating valve, and optimizing the initial opening and closing degree of the air volume regulating valve according to the optimized deviation; If the optimized deviation is less than the deviation threshold, maintaining the initial opening and closing degree of the air volume regulating valve as the optimized opening and closing degree of the air volume regulating valve; If the optimized deviation is greater than or equal to the deviation threshold, the ideal opening and closing degree of the air volume regulating valve is set as the optimized opening and closing degree of the air volume regulating valve.

6. A boiler energy-saving combustion control system according to claim 1, characterized in that: The strategy correction module is used to determine whether the optimized air volume control valve opening degree needs to be corrected according to the parameter to be controlled, and further includes: Obtain the O2 content in the flue gas at multiple times, and calculate the average O2 content in the flue gas of the O2 content in the flue gas at all times; Presetting a first O2 threshold and a second O2 threshold, wherein the first O2 threshold is greater than the second O2 threshold; If the average value of the O2 content in the flue gas is greater than or equal to the first O2 threshold, it is determined that a first correction needs to be made to the opening and closing degree of the optimized air volume regulating valve; If the average value of the O2 content in the flue gas is less than or equal to the second O2 threshold, it is determined that a second correction needs to be performed on the opening and closing degree of the optimized air volume regulating valve; If the average O2 content in the flue gas is greater than the second O2 threshold value, and the average O2 content in the flue gas is less than the first O2 threshold value, it is determined that there is no need to correct the optimized air volume control valve opening and closing degree.

7. A boiler energy-saving combustion control system according to claim 6, characterized in that: The strategy correction module is used to determine whether the optimized air volume control valve opening degree needs to be corrected according to the parameter to be controlled, and further includes: When the mean value of the O2 content in the flue gas is greater than or equal to the first O2 threshold, filtering the O2 content in the flue gas collected at all times, and eliminating all O2 contents in the flue gas less than the first O2 threshold; Calculate the difference between each O2 content in the filtered flue gas and the first O2 threshold value, and calculate the O2 deviation mean; The O2 deviation mean is the average value of the difference between the O2 content in all the filtered flue gases and the first O2 threshold value; A first correction is performed on the opening and closing degree of the optimized air volume regulating valve according to the O2 deviation mean and a preset adjustment ratio.

8. A boiler energy-saving combustion control system according to claim 7, characterized in that: The strategy correction module is used to determine whether the optimized air volume control valve opening degree needs to be corrected according to the parameter to be controlled, and further includes: When the average O2 content in the flue gas is less than or equal to the second O2 threshold, obtaining the CO content in the boiler corresponding to the multiple moments; Pre-set CO correction threshold in boiler; Normalizing the CO contents in the boilers at the multiple moments, and calculating a first CO difference, wherein the first CO difference is a difference between a maximum CO content in the boiler and a minimum CO content in the boiler after the normalization; Calculating a plurality of CO second difference values ​​according to the normalized CO content in the boiler and the CO first difference value, wherein the plurality of CO second difference values ​​are respectively the difference between each normalized CO content in the boiler and the CO first difference value; The second correction coefficient is calculated according to the CO first difference and the CO second difference: ； Where n is the second correction coefficient, , is the weight, which can be adjusted according to historical data, y is the number of CO second differences, is the second difference of the i-th CO, is the mean of all CO second differences, f is the CO first difference, To adjust the coefficient, it can be adjusted based on historical data; A second correction is performed on the optimized opening and closing degree of the air volume regulating valve according to the second correction coefficient, and the opening and closing degree of the air volume regulating valve after the second correction is equal to n times the optimized opening and closing degree of the air volume regulating valve.

9. A boiler energy-saving combustion control system according to claim 1, characterized in that: The boiler energy-saving combustion control system also includes a monitoring module: The monitoring module is used to generate a boiler combustion operation image according to the parameters to be controlled, and to determine whether to issue a boiler operation alarm according to the parameters to be controlled.

10. A boiler energy-saving combustion control method, characterized in that: include: Detecting the parameters to be controlled inside the boiler during the combustion process, wherein the parameters to be controlled include the CO content in the boiler, the CO content in the flue gas, the CO2 content in the flue gas, and the O2 content in the flue gas; Selecting the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled and the preset strategy; Optimizing the initial opening and closing degree of the air volume regulating valve according to the parameters to be controlled to obtain an optimized opening and closing degree of the air volume regulating valve; It is determined whether the optimized air volume regulating valve opening degree needs to be corrected according to the parameter to be controlled.

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