Variable coal type NOx concentration adjusting method, system, equipment, medium and product

Abstract

The invention belongs to the technical field of NOx emission, and discloses a variable coal type NOx concentration adjusting method, system, equipment, medium and product, the method comprises the following steps: establishing a fitting function taking the opening degree of an over fire air door as a dependent variable, and the independent variables of the fitting function are element analysis data of coal quality and industrial analysis data of coal quality; the real-time coal quality element content is obtained through the fired coal quality real-time monitoring system, the real-time coal quality element content is substituted into the function of the over-fire air door opening degree, and the over-fire air door opening degree is obtained; when the coal as fired is consistent with the test coal type, the obtained over fire air door opening degree is the optimal opening degree; when the coal as fired is inconsistent with the test coal type, the over-fire air door corresponding to the area with the low CO and H2S concentration is opened till the CO and H2S concentration is at the critical value, and the final over-fire air door opening degree is the optimal air door opening degree at the moment. When the coal type changes, the over fire air door opening degree corresponding to the NOx equilibrium concentration can be obtained on the basis of an original combustion test.

Description

Technical Field

[0001] The present invention belongs to the technical field of NOx emission, and in particular relates to a method, system, equipment, medium and product for regulating NOx concentration of coal types. Background Art

[0002] For units that have implemented ultra-low NOx emissions, most units have air preheater ABS blockage problems. The direct cause of air preheater ABS blockage is excessive ammonia slip from SCR. For some units whose SCR denitrification efficiency has reached the upper limit, in order to control ammonia slip, measures can only be taken to control the coal powder combustion in the furnace to reduce the NOx concentration in the flue gas at the SCR inlet and increase the SCR denitrification efficiency margin. After adopting low-nitrogen combustion technology, the oxygen content of boiler operation is generally reduced. Low-oxygen operation will increase the CO content and fly ash combustible content in the flue gas while reducing NOx generation. In addition to CO generation, low-nitrogen combustion also causes a series of problems such as burnout, water-cooled wall corrosion, slagging, low steam temperature, and excessive cooling water, which unbalances the performance indicators of the boiler and reduces the overall safety and economy of the boiler. Therefore, the NOx generation concentration should be controlled during boiler combustion. Excessive NOx concentration will increase the burden of SCR and affect the economy and safety of SCR. Excessive NOx concentration will cause a series of problems in the boiler combustion system. It is necessary to seek a balance point of NOx generation concentration between combustion and SCR.

[0003] The Chinese patent publication number is CN115899756A, and the name is a patent application for a method, device, system and storage medium for controlling the opening of a boiler damper. The method includes: S1: obtaining the original damper opening, time and original unit power from the DCS system, obtaining the original H2S concentration from the H2S online detection system, and obtaining the original calorific value of the incoming coal and the original sulfur content of the incoming coal from the coal quality online detection system; S2: respectively taking the original damper opening and time, the original unit power, the original H2S concentration, the original calorific value of the incoming coal and the original sulfur content of the incoming coal as arrays, thereby obtaining an array of the original damper opening, and storing the arrays of all the original damper openings in a preset H2S optimization database. Although this patent application can control the opening of the boiler damper, it cannot obtain the burnout damper opening required for the NOx equilibrium concentration. Summary of the invention

[0004] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a method, system, equipment, medium and product for regulating NOx concentration of changing coal types, which can obtain the burnout air damper opening corresponding to the NOx equilibrium concentration on the basis of the original combustion test when the coal type changes through quantitative fitting of the burnout air damper opening, detection and verification of the coal quality entering the furnace, and optimization of the burnout air damper opening.

[0005] To achieve the above object, the technical solution adopted by the present invention is: In a first aspect, the present invention provides a method for adjusting NOx concentration in coal type, comprising the following steps: S1: Establish a fitting function with the opening of the overburnt air damper as the dependent variable, wherein the independent variables of the fitting function are the elemental analysis data of coal quality and the industrial analysis data of coal quality; S2: obtain the real-time coal quality element content through the real-time coal quality monitoring system of the incoming coal, substitute the real-time coal quality element content into the function of the burnout air damper opening, and obtain the burnout air damper opening; S3: When the coal entering the furnace is consistent with the test coal type, the burnout air damper opening obtained in step S2 is the optimal opening; when the coal entering the furnace is inconsistent with the test coal type, the burnout air damper corresponding to the area with lower CO and H2S concentrations is opened until the CO and H2S concentrations are at the critical value. The final burnout air damper opening is the optimal damper opening at this time.

[0006] Optionally, in step S3, when the burnout air damper is closed until the CO and H2S concentrations reach the critical value, if the NOx concentration is , then the burnout air damper opening is the optimal opening; when the burnout air damper is not closed until the CO and H2S concentrations reach the critical value, and the NOx concentration Continue to close the burnout air damper until the CO and H2S concentrations reach the critical value, or When the overburnt air damper stops closing, the overburnt air damper opening is the optimal opening; when the overburnt air damper is not closed until the CO and H2S concentrations reach the critical value, and the NOx concentration , the burnout air damper is no longer closed, and the burnout air damper opening is the optimal opening.

[0007] Optionally, in step S1, a corresponding damper opening when no high-temperature corrosion occurs in the unit is obtained through a combustion adjustment test.

[0008] Optionally, in step S2, a LIBS real-time monitoring system for the quality of incoming coal is provided on the incoming coal feeding system of the unit.

[0009] Optionally, in step S3, the opening data and coal quality analysis data are captured and recorded.

[0010] Optionally, after obtaining the fitting function in step S1, continue to collect new data of the independent variable and the dependent variable, merge the newly collected data with the historical data into cumulative data, and refit the function based on the cumulative data.

[0011] In a second aspect, the present invention provides a method system for adjusting NOx concentration of coal type, comprising: A function building module is used to build a fitting function with the burnout air damper opening as a dependent variable, wherein the independent variables of the fitting function are the elemental analysis data of coal quality and the industrial analysis data of coal quality; A calculation module is used to obtain the real-time coal quality element content through the real-time coal quality monitoring system of the incoming coal, substitute the real-time coal quality element content into the function of the burnout air damper opening, and obtain the burnout air damper opening; The judgment module is used to judge that when the coal entering the furnace is consistent with the test coal type, the burnout air damper opening obtained in step S2 is the optimal opening; when the coal entering the furnace is inconsistent with the test coal type, the burnout air damper corresponding to the area with lower CO and H2S concentrations is opened until the CO and H2S concentrations are at the critical value, and the final burnout air damper opening is the optimal damper opening at this time.

[0012] In a third aspect, the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the method for regulating NOx concentration of variable coal types is implemented when the processor executes the computer program.

[0013] In a fourth aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for regulating NOx concentration in variable coal types is implemented.

[0014] In a fifth aspect, the present invention provides a computer program product including a computer-readable medium, on which a computer-readable program code is contained, and the program code executes the method for adjusting the NOx concentration of varying coal types.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention quantifies the burnout air damper opening on the basis of the combustion adjustment test, and obtains the fitting formula of the burnout air damper optimal opening and coal quality analysis data. The real-time monitoring system for incoming coal analyzes the quality of incoming coal in real time to obtain the calculated value of the burnout air damper opening, and performs feedback adjustment according to the real-time monitoring results of NOx generation concentration, CO concentration and H2S concentration to obtain the optimal burnout air damper opening under NOx equilibrium concentration. The present invention can obtain the burnout air damper opening corresponding to the NOx equilibrium concentration based on the original combustion test when the coal type changes.

[0016] Furthermore, the present invention continuously collects new data, adds new data, and repeatedly learns and optimizes, so that the model continuously adapts to new data distribution and patterns, and can continuously optimize the fitting function, so that the fitted model is closer to the actual effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.

[0018] In the attached picture: Figure 1 It is a schematic diagram of the process of the present invention.

[0019] Figure 2 It is a comparison chart of the test results and fitting results of Example 2 of the present invention. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] It should be noted that in the claims, any reference signs placed between brackets shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The present application may be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names. In addition, 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, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined. The present invention is described in detail below with reference to the accompanying drawings.

[0023] like Figure 1As shown, a method for adjusting NOx concentration of coal type according to the present invention comprises the following steps: S1: Establish a fitting function with the opening of the overburnt air damper as the dependent variable, wherein the independent variables of the fitting function are the elemental analysis data of coal quality and the industrial analysis data of coal quality; S2: obtain the real-time coal quality element content through the real-time coal quality monitoring system of the incoming coal, substitute the real-time coal quality element content into the function of the burnout air damper opening, and obtain the burnout air damper opening; S3: When the coal entering the furnace is consistent with the test coal type, the burnout air damper opening obtained in step S2 is the optimal opening; when the coal entering the furnace is inconsistent with the test coal type, the burnout air damper corresponding to the area with lower CO and H2S concentrations is opened until the CO and H2S concentrations are at the critical value. The final burnout air damper opening is the optimal damper opening at this time.

[0024] The NOx equilibrium concentration involves the complex combustion process in the furnace. Usually, the corresponding damper opening when the unit does not suffer from high-temperature corrosion and reduced furnace efficiency can be given through combustion adjustment tests. Under this premise, a lower NOx concentration can be adjusted by controlling other variables, and combined with the denitrification test results, it can be verified whether the NOx concentration can meet the denitrification operation requirements, and further the NOx equilibrium concentration can be obtained. However, the test is carried out under limited coal types and mill combinations. Due to the large changes in the quality of coal used in coal-fired power plants, the actual operating coal quality often deviates greatly from the test coal quality, and the effect of the combustion adjustment test will be affected.

[0025] Based on the combustion adjustment test, the present invention quantifies the opening of the burnout air damper and obtains the fitting formula of the optimal opening of the burnout air damper and the coal quality analysis data. The real-time monitoring system of the incoming coal analyzes the quality of the incoming coal in real time to obtain the calculated value of the burnout air damper opening, and feedback adjustment is performed according to the real-time monitoring results of the NOx generation concentration, CO concentration and H2S concentration to obtain the optimal opening of the burnout air damper under the NOx equilibrium concentration.

[0026] Example 1 Step 1: Quantitative fitting of the burnout air damper opening: First, through the combustion adjustment test, the corresponding damper opening when the unit does not suffer from high-temperature corrosion is given. Under this premise, a lower NOx concentration is adjusted by controlling other variables, and combined with the denitrification test results, it is verified whether the NOx concentration can meet the denitrification operation requirements, and further the NOx equilibrium concentration is obtained.

[0027] At this time, the corresponding burnout air damper opening is the optimal solution for the current coal type. The optimal burnout air damper opening after the combustion adjustment test is fitted with the corresponding industrial analysis and elemental analysis results of the incoming coal to obtain the fitting formula for the optimal burnout air damper opening and coal quality analysis data.

[0028] Optionally, the fitting formula adopts linear fitting.

[0029] Taking the number of four burnout air dampers as an example, the formula is as follows:

[0030] In the formula, k1, k2, k3, k4 are the openings of the burnout air damper, C, H, O, N, S are the element analysis data of coal quality, Industrial analysis data for coal quality.

[0031] Step 2: Detection and verification of coal quality entering the furnace: A LIBS real-time monitoring system for the quality of coal entering the furnace is installed on the coal feeding system of the unit.

[0032] As a new material identification and quantitative analysis technology, LIBS is widely used in online detection at industrial sites. It can be used in many occasions such as heavy metals in soil, coal quality analysis, and sewage detection. It has fast analysis, can analyze multiple elements at the same time, and can detect solid samples. LIBS can obtain real-time coal quality element content by irradiating coal with laser pulses.

[0033] In the unit control system, a fitting formula for the optimal opening of the burnout air damper and the coal quality analysis data is built in. During the actual operation of the unit, the real-time analysis results of the real-time monitoring system of the incoming coal are substituted into the fitting formula to obtain the opening of the burnout air damper. .

[0034] If the coal entering the furnace is consistent with the test coal type, obviously, this damper opening is the optimal opening. If the coal entering the furnace is inconsistent with the test coal type, feedback adjustment is performed based on the real-time monitoring results of NOx generation concentration, CO concentration and H2S concentration.

[0035] Step 3: Optimization of burnout air damper opening: When the coal quality is different from the test coal type, the obtained Since it is a calculated result, there may be some errors, so it needs to be adjusted according to the actual measured results.

[0036] The present invention installs a real-time detection meter for CO and H2S concentrations behind a water-cooled wall sampling tube in a boiler combustion zone, and combines the online meter for NOx concentration at a furnace outlet to obtain NOx generation concentration, CO concentration and H2S concentration at the current opening.

[0037] At this opening, if the CO and H2S concentrations are both at a low level, it means that there is still room for the burnout air to increase. At this time, the burnout air damper corresponding to the area with lower CO and H2S concentrations is opened until the CO and H2S concentrations are at the critical value. The critical value is selected based on experience. During this process, the NOx concentration continues to decrease, and the final burnout air damper opening is the optimal damper opening at this time. At this time, the control system captures the opening data and coal quality analysis data at this time, and records them in the database.

[0038] If the CO and H2S concentrations are both at a high level at this opening, it indicates that the overburnt air is large. At this time, the overburnt air damper corresponding to the area with higher CO and H2S concentrations should be closed.

[0039] During this process, the concentrations of CO and H2S continue to decrease, while the concentration of NOx continues to increase, and the final burnout air damper opening needs to maintain a balance between the two.

[0040] Therefore, the present invention introduces the inlet NOx concentration corresponding to the maximum safe denitrification efficiency and design value of NOx concentration at the denitrification inlet ,generally The judgment criteria are as follows: When the burnout air damper is closed until the CO and H2S concentrations reach the critical value, if the NOx concentration , indicating that the unit does not have high-temperature corrosion problems at this time, and although the NOx concentration at the denitrification inlet increases, it is still within the safe range, and the ammonia escape concentration at the denitrification outlet does not exceed 3μL / L, then this burnout air damper opening is the optimal opening; When the burnout air damper is not closed until the CO and H2S concentrations reach the critical value, but the NOx concentration , indicating that the unit has both high-temperature corrosion problems and ammonia escape concentration at the denitration outlet exceeding 3μL / L. Considering that long-term high-temperature corrosion will lead to safe operation of the unit, ammonia escape concentration exceeding 3μL / L will cause the air preheater resistance to rise, that is, the economy will decrease, but it is still within the denitration safe operation range. Therefore, in order to ensure the safety of the boiler, the burnout air damper is closed at this time and the unit continues to be closed until the CO and H2S concentrations reach the critical value, or When , the burnout air damper stops closing, and the burnout air damper opening at this time is the optimal opening; When the burnout air damper is not closed until the CO and H2S concentrations reach the critical value, but the NOx concentration , indicating that the NOx concentration at the denitrification inlet exceeds the denitrification design value, and the chimney is likely to exceed the standard emission problem. At this time, the burnout air damper cannot be closed any further. Even though the CO and H2S concentrations are high at this time, the boiler may suffer from high-temperature corrosion. However, the chimney emission must meet the standard first, and the burnout air damper opening is the optimal opening at this time. In these three cases, the control system will collect the opening data and coal quality analysis data at that time and record them in the database.

[0041] Example 2 According to the steps of Example 1, industrial analysis data of actual coal quality are collected for calculation. The industrial analysis data corresponding to the coal quality are shown in Table 1 below.

[0042] Table 1 Burnout damper opening Received carbon base Received base hydrogen Received base oxygen Received basic nitrogen Received basic sulfur Received base ash Received base volatiles Full moisture Low heat generation K1 C H O N S A V M Q % % % % % % % % % kJ / kg 5 62.63 3.36 7.27 1.06 0.51 11.88 40.84 13.3 22186 15 63.05 3.38 7.32 1.06 0.32 11.17 39.28 13.7 22320 30 61.95 3.32 7.19 1.05 0.4 9.5 38.78 14.0 22497 45 62.28 3.34 7.23 1.05 0.91 12.39 41.01 14.8 23224 55 64.16 3.44 7.44 1.08 0.33 10.34 40.19 14.2 23634 70 62.85 3.37 7.29 1.06 0.44 10.99 38.91 15.1 23019 80 62.85 3.37 7.29 1.06 0.44 10.99 38.91 15.8 23019 90 62.23 3.34 7.22 1.05 0.34 8.26 37.25 17.56 22434 100 62.23 3.34 7.22 1.05 0.34 8.26 37.25 17.56 22434 After analysis, K1 is mainly affected by ash, volatile matter and moisture. The fitting formula is: K1=-320.6283+0.91125*A+1.19758*V+21.08622*M The calculation results are as follows Figure 2 As shown, according to Figure 2 It can be seen that the fitting results are very close to the experimental results, indicating that the fitting is effective.

[0043] The analytical data of the test are shown in Table 2 below: Table 2

[0044] According to the above formula K1=-320.6283+0.91125*A+1.19758*V+21.08622*M, the calculated K1 opening is 52%.

[0045] The fitting formula K1=-320.6283+0.91125*A+1.19758*V+21.08622*M. The calculated opening is close to the test opening, but there are still deviations at some points, and the test data is limited. As the system running time increases, more and more cumulative data is collected through the collection of system operation data, and the result calculated by the fitting function obtained by fitting the cumulative data is more accurate.

[0046] Example 3 Based on the method for adjusting NOx concentration of coal types according to Example 1, a method system for adjusting NOx concentration of coal types according to Example 1 is disclosed, comprising: A function building module is used to build a fitting function with the burnout air damper opening as a dependent variable, wherein the independent variables of the fitting function are the elemental analysis data of coal quality and the industrial analysis data of coal quality; A calculation module is used to obtain the real-time coal quality element content through the real-time coal quality monitoring system of the incoming coal, substitute the real-time coal quality element content into the function of the burnout air damper opening, and obtain the burnout air damper opening; The judgment module is used to judge that when the coal entering the furnace is consistent with the test coal type, the burnout air damper opening obtained in step S2 is the optimal opening; when the coal entering the furnace is inconsistent with the test coal type, the burnout air damper corresponding to the area with lower CO and H2S concentrations is opened until the CO and H2S concentrations are at the critical value, and the final burnout air damper opening is the optimal damper opening at this time.

[0047] Example 4 The purpose of this embodiment is to provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the method for regulating NOx concentration of varying coal types is implemented when the processor executes the computer program.

[0048] Example 5 The purpose of this embodiment is to provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for adjusting NOx concentration of changing coal types is implemented.

[0049] Example 6 The purpose of this embodiment is to provide a computer program product including a computer-readable medium, on which a computer-readable program code is contained, and the program code executes the method for adjusting the NOx concentration of varying coal types.

[0050] The steps involved in the devices of the above embodiments 3, 4, 5 and 6 correspond to those of the method embodiment 1. For the specific implementation methods, please refer to the relevant description part of embodiment 1.

[0051] It should be understood by those skilled in the art that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks. These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes. These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0052] Unless otherwise specified, the working modes or control modes involved in the above embodiments are all conventional working modes or control modes in the art.

[0053] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application. Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for adjusting NOx concentration of coal type, characterized in that: The following steps are involved: S1: Establish a fitting function with the opening of the overburnt air damper as the dependent variable, wherein the independent variables of the fitting function are the elemental analysis data of coal quality and the industrial analysis data of coal quality; S2: obtain the real-time coal quality element content through the real-time coal quality monitoring system of the incoming coal, substitute the real-time coal quality element content into the function of the burnout air damper opening, and obtain the burnout air damper opening; S3: When the coal entering the furnace is consistent with the test coal type, the burnout air damper opening obtained in step S2 is the optimal opening; when the coal entering the furnace is inconsistent with the test coal type, the burnout air damper corresponding to the area with lower CO and H2S concentrations is opened until the CO and H2S concentrations are at the critical value. The final burnout air damper opening is the optimal damper opening at this time.

2. A method for adjusting NOx concentration in coal type according to claim 1, characterized in that: In step S3, when the burnout air damper is closed until the CO and H2S concentrations reach the critical value, if the NOx concentration , then the burnout air damper opening is the optimal opening; when the burnout air damper is not closed until the CO and H2S concentrations reach the critical value, and the NOx concentration Continue to close the burnout air damper until the CO and H2S concentrations reach the critical value, or When the overburnt air damper stops closing, the overburnt air damper opening is the optimal opening; when the overburnt air damper is not closed until the CO and H2S concentrations reach the critical value, and the NOx concentration , the burnout air damper is no longer closed, and the burnout air damper opening is the optimal opening.

3. The method for adjusting NOx concentration of coal type according to claim 1, characterized in that: In step S1, a corresponding damper opening when no high-temperature corrosion occurs in the unit is obtained through a combustion adjustment test.

4. The method for adjusting NOx concentration of coal type according to claim 1, characterized in that: In step S2, the LIBS real-time monitoring system for the quality of incoming coal is set on the incoming coal feeding system of the unit.

5. The method for adjusting NOx concentration of coal type according to claim 1, characterized in that: In step S3, the opening data and coal quality analysis data are captured and recorded.

6. A method for adjusting NOx concentration in coal of varying types according to claim 5, characterized in that: After the fitting function is obtained in step S1, new data of independent variables and dependent variables are continuously collected, the newly collected data are combined with historical data into accumulated data, and the function is refitted according to the accumulated data.

7. A method and system for adjusting NOx concentration of coal type, characterized in that: include: A function building module is used to build a fitting function with the burnout air damper opening as a dependent variable, wherein the independent variables of the fitting function are the elemental analysis data of coal quality and the industrial analysis data of coal quality; A calculation module is used to obtain the real-time coal quality element content through the real-time coal quality monitoring system of the incoming coal, substitute the real-time coal quality element content into the function of the burnout air damper opening, and obtain the burnout air damper opening; The judgment module is used to judge that when the coal entering the furnace is consistent with the test coal type, the burnout air damper opening obtained in step S2 is the optimal opening; when the coal entering the furnace is inconsistent with the test coal type, the burnout air damper corresponding to the area with lower CO and H2S concentrations is opened until the CO and H2S concentrations are at the critical value, and the final burnout air damper opening is the optimal damper opening at this time.

8. An electronic device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the method for regulating NOx concentration of coal types as claimed in any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for adjusting NOx concentration of varying coal types according to any one of claims 1-6 is implemented.

10. A computer program product comprising a computer readable medium, characterized in that The computer-readable medium contains computer-readable program code, and the program code executes the method for adjusting NOx concentration of coal types according to any one of claims 1-6.

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