Data-enabled internal ignition analysis method and system for coal mills of coal-fired units

Abstract

The application discloses a data-enabled coal-fired unit coal mill internal ignition analysis method and system, the system comprises a first greater than comparison module, a second greater than comparison module, a first phase and module, a first break delay module, a first delay module, a first switching module, a first pulse module, a first and module, a first non-module, a second delay module, a second pulse module, a first counting module, a third greater than comparison module, a second counting module, a fourth greater than comparison module, a third delay module and a third pulse module; the method takes a coal mill blockage model as an initial judgment condition, formulates boundary conditions suitable for safe operation of the coal mill in combination with equipment operating conditions under various working conditions, analyzes and judges internal ignition problems of the coal mill in a timely manner, prompts an operator to shut down the coal mill as soon as possible, closes coal mill inlet and outlet doors and sealing air doors, and puts into fire-fighting steam or inert gas for fire extinguishing.

Description

Technical Field

[0001] This invention belongs to the field of intelligent control of thermal power plants, specifically relating to a data-enabled method and system for analyzing internal ignition in coal mills of coal-fired power units. Background Technology

[0002] In coal-fired power units, internal fires in the coal mill are a serious safety issue, threatening not only the safe operation of the equipment but also potentially causing significant impacts on the entire power generation system. Currently, the causes of this problem include: coal type factors (burning coals with high volatile matter, high fixed carbon, and low ash melting point easily leads to smoke and ignition of coking coal); coking coal discharge issues (untimely or improper discharge of coking coal can cause it to accumulate and ignite inside the mill); ambient temperature factors (higher ambient temperatures increase the likelihood of smoke and ignition); mill outlet temperature factors (higher mill outlet temperatures make coking coal more prone to smoke and ignition); equipment malfunctions (malfunctions in valves or equipment related to coking coal can prevent proper discharge, leading to accumulation and ignition); and insufficient inspections (insufficient inspections or inadequate monitoring can prevent the timely detection and handling of coking coal fires).

[0003] Based on the reasons under the above six different operating conditions, there is an urgent need to develop a data-enabled method and system for analyzing the internal ignition of coal mills in coal-fired power units, in order to solve the problem of internal ignition of coal mills and help the equipment to operate safely and stably. Summary of the Invention

[0004] The purpose of this invention is to provide a data-enabled method and system for analyzing internal fires in coal mills of coal-fired power units. This invention uses a coal mill blockage model as the initial judgment condition, combines the equipment operating conditions under various working conditions, formulates boundary conditions suitable for the safe operation of the coal mill, analyzes and judges the problem of internal fires in the coal mill in a timely manner, and prompts the operators to shut down the coal mill as soon as possible, close the coal mill inlet and outlet doors and sealing dampers, and introduce fire-fighting steam or inert gas for fire extinguishing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The data-enabled coal mill internal ignition analysis system for coal-fired power units includes a first greater than comparison module, a second greater than comparison module, a first phase AND module, a first break delay module, a first delay module, a first switching module, a first pulse module, a first AND module, a first NOT module, a second delay module, a second pulse module, a first counting module, a third greater than comparison module, a second counting module, a fourth greater than comparison module, a third delay module, and a third pulse module. The outputs of the first greater than comparison module and the second greater than comparison module are both connected to the first AND module. The output of the first AND module is connected to the first delay module. The output of the first delay module is connected to the EN terminal of the first AND module, the first counting module, and the second counting module, respectively. The output of the first NOT module is connected to the first AND module. The outputs of the first AND module and the first switching module are connected to the input and R terminals of the second delay module, respectively. The output of the second delay module is connected to the second pulse module. The output of the first delay module is connected to the EN terminal of the first switching module; the outputs of the second pulse module and the third pulse module are respectively connected to the input and R terminals of the second counting module; the output of the second counting module is connected to the fourth greater than comparison module; the output of the fourth greater than comparison module is connected to the third delay module; the output of the third delay module is connected to the third pulse module; the outputs of the first pulse module and the third pulse module are respectively connected to the input and R terminals of the first counting module; the output of the first counting module is connected to the third greater than comparison module.

[0006] A further improvement of the present invention is that it also includes a first subtraction module, a second subtraction module, a fifth greater than comparison module, a sixth greater than comparison module, a seventh greater than comparison module, an eighth greater than comparison module, a fourth delay module, a fifth delay module, a sixth delay module, a second AND module, a third AND module, a first OR module, and a fourth AND module; The output of the first subtraction module is connected to the fifth greater than comparison module, and the output of the fifth greater than comparison module is connected to the fourth delay module; the coal mill outlet air-coal mixture temperature is connected to the sixth greater than comparison module, and the output of the sixth greater than comparison module is connected to the fifth delay module; the coal mill outlet air-coal mixture temperature and the coal mill outlet air-coal mixture temperature of the previous minute are both connected to the second subtraction module, the output of the second subtraction module is connected to the seventh greater than comparison module, the output of the seventh greater than comparison module is connected to the sixth delay module, and the output of the sixth delay module and the coal mill blockage warning are both connected to the second AND module; the outputs of the fourth delay module, the fifth delay module, and the second AND module are all connected to the first OR module; the output of the eighth greater than comparison module is connected to the third AND module, and the outputs of the first OR module and the third AND module are both connected to the fourth AND module.

[0007] A further improvement of the present invention is that the speed of the coal feeder belt motor is connected to the first greater than comparison module, and the current of the coal mill is connected to the second greater than comparison module.

[0008] A further improvement of the present invention is that the output of the second delay module is also connected to the Python main model coal mill blockage, and the Python main model coal mill blockage is connected to the first pulse module and the first interruption delay module respectively.

[0009] A further improvement of the present invention is that the output of the third greater than comparison module is connected to the coal mill blockage early warning system.

[0010] A further improvement of the present invention is that the coal mill outlet air-coal mixing temperature and the coal mill outlet air-coal mixing temperature in the first minute are both connected to the first subtraction module.

[0011] A further improvement of the present invention is that the output end of the coal feed rate is connected to the eighth comparison module, and the grinding roller is lowered to the position and connected to the third comparison module.

[0012] A further improvement of the present invention is that the output terminal of the fourth module is connected to the coal mill fire warning system.

[0013] Data-driven methods for analyzing internal ignition in coal mills of coal-fired power units include: When the speed of the coal feeder belt motor meets the first condition of being greater than the built-in constant 100 of the comparison module and the current of the coal mill meets the second condition of being greater than the built-in constant 5 of the comparison module, and when the built-in constant 30 of the first delay module is met, then after the judgment of the first AND module, the second delay module, and the second pulse module, it is determined that the coal mill blockage of the Python main model is called. When the call to the Python main model coal mill blockage meets the built-in constant 3 of the first delay module, the built-in constant 8 of the first switching module is triggered, and this signal is output after 8 seconds; otherwise, the built-in constant 15 of the first switching module is triggered, and this signal is output after 15 seconds; this function is used to trigger the R terminal of the second delay module to reset the signal of the call to the Python main model coal mill blockage to 0. When the feeder belt motor speed meets the first requirement of being greater than the built-in constant 100 of the comparison module and the pulverizer current meets the second requirement of being greater than the built-in constant 5 of the comparison module, and the first delay module's built-in constant 30 is met, the counting function of the first counting module is triggered. The first counting module counts effectively based on the number of times the pulverizer blockage is triggered by calling the Python main model at the input. When the third requirement of being greater than the built-in constant 3 of the comparison module is met, a pulverizer blockage warning is output. When the first counting module needs to be reset, calling the pulverizer blockage in the Python main model requires the second counting module, the fourth requirement of being greater than the built-in constant 3 of the comparison module, the third delay module, and the third pulse module to be met in sequence. Finally, the counting function of the first counting module can be reset to 0, and the pulverizer blockage warning will also become 0.

[0014] A further improvement of the present invention is that it further includes: The first OR module is triggered when any one of the following three conditions is met: The coal mill outlet air-coal mixture temperature and the coal mill outlet air-coal mixture temperature of the previous minute are successively calculated by subtraction in the first subtraction module, judged by the built-in constant 8 of the fifth greater than comparison module, and judged by the built-in constant 10 of the fourth delay module; the coal mill outlet air-coal mixture temperature is successively judged by the built-in constant 110 of the sixth greater than comparison module, and judged by the built-in constant 10 of the fifth delay module; the coal mill outlet air-coal mixture temperature and the coal mill outlet air-coal mixture temperature of the previous minute are successively calculated by subtraction in the second subtraction module, judged by the built-in constant 5 of the seventh greater than comparison module, and judged by the built-in constant 10 of the sixth delay module, while simultaneously satisfying the coal mill blockage warning value of 1; The third module is triggered when any one of the following conditions is met: The coal feed rate meets the requirement that the eighth parameter is greater than the built-in constant 10 of the comparison module, and the grinding roller is lowered to position 1. When the first AND module is 1 and the third AND module is 1, the coal mill fire warning will be output after the fourth AND module makes the judgment.

[0015] Compared with the prior art, the present invention has at least the following beneficial technical effects: This invention provides a data-driven method for analyzing internal fires in coal mills of coal-fired power units. It adopts a quantitative boundary condition analysis method to sort out and analyze the causes of fires in coal mills, and formulates an operational boundary range applicable to the judgment of fires in coal mills, so as to guide the safe operation of the equipment.

[0016] This invention provides a data-enabled coal mill internal ignition analysis system for coal-fired power units. It adopts a dataset based on field sensor equipment and uses a modular judgment system to analyze and organize the data of coal mill operation. The system performs health evaluation and safety guidance on the equipment's operating status.

[0017] In summary, the data-enabled coal mill internal fire analysis method and system described in this invention takes into account the safety, stability and efficiency of the coal mill under different operating conditions, analyzes and judges the internal fire problem of the coal mill in a timely manner, and prompts the operators to shut down the coal mill as soon as possible, close the coal mill inlet and outlet doors and sealing dampers, and introduce fire-fighting steam or inert gas to extinguish the fire. Attached Figure Description

[0018] Figure 1 Schematic diagram of the internal ignition analysis system of coal mill in a coal-fired power unit that enables data-driven analysis of this invention; Figure 2 Schematic diagram of the internal ignition analysis system of coal mill in a coal-fired power unit that enables data-driven analysis of this invention; Figure 3 This is a rendering of an embodiment of the present invention.

[0019] In the attached image: 001. Call the Python main model: coal mill blockage; 002. Coal feeder belt motor speed; 003. Coal mill current; 004. First greater than comparison module; 005. Second greater than comparison module; 006. First AND module; 007. First delay module; 008. First delay module; 009. First switching module; 010. First pulse module; 011. First AND module; 012. First NOT module; 013. Second delay module; 014. Second pulse module; 015. First counting module; 016. Third greater than comparison module; 017. Second counting module; 018. Fourth greater than comparison module; 019. Third delay module; 020. The third pulse module includes: 021, mill blockage warning; 022, mill outlet air-coal mixture temperature; 023, mill outlet air-coal mixture temperature in the previous minute; 024, coal feed rate; 025, mill rollers lowered to position; 026, first subtraction module; 027, second subtraction module; 028, fifth greater than comparison module; 029, sixth greater than comparison module; 030, seventh greater than comparison module; 031, eighth greater than comparison module; 032, fourth delay module; 033, fifth delay module; 034, sixth delay module; 035, second AND module; 036, third AND module; 037, first OR module; 038, fourth AND module; and 039, mill fire warning. Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0027] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0028] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0029] The present invention provides a data-enabled method and system for analyzing internal fires in coal mills of coal-fired power units. The present invention adopts a coal mill blockage model as the initial judgment condition, and combines the equipment operating conditions under various working conditions to formulate boundary conditions suitable for the safe operation of the coal mill. It can analyze and judge the problem of internal fire in the coal mill in a timely manner, prompting the operators to shut down the coal mill as soon as possible, close the coal mill inlet and outlet doors and sealing dampers, and introduce fire-fighting steam or inert gas for fire extinguishing.

[0030] Example 1 like Figure 1 As shown, the data-enabled coal mill internal ignition analysis system provided by this invention includes: a Python main model for coal mill blockage 001, a feeder belt motor speed 002, a coal mill current 003, a first greater than comparison module 004, a second greater than comparison module 005, a first AND module 006, a first timeout module 007, a first timeout module 008, a first switching module 009, a first pulse module 010, a first AND module 011, a first NOT module 012, a second timeout module 013, a second pulse module 014, a first counting module 015, a third greater than comparison module 016, a second counting module 017, and a fourth greater than comparison module 018. 18. Third Delay Module 019. Third Pulse Module 020. Mill Blockage Warning 021. Mill Outlet Air-Powder Mixing Temperature 022. Mill Outlet Air-Powder Mixing Temperature in the Previous Minute 023. Coal Feed Rate 024. Mill Roller Lowering to Position 025. First Subtraction Module 026. Second Subtraction Module 027. Fifth Greater Than Comparison Module 028. Sixth Greater Than Comparison Module 029. Seventh Greater Than Comparison Module 030. Eighth Greater Than Comparison Module 031. Fourth Delay Module 032. Fifth Delay Module 033. Sixth Delay Module 034. Second AND Module 035. Third AND Module 036. First OR Module 037. Fourth AND Module 038. Mill Fire Warning 039.

[0031] The feeder belt motor speed 002 is connected to the first greater than comparison module 004, the pulverizer current 003 is connected to the second greater than comparison module 005, the output terminals of the first greater than comparison module 004 and the second greater than comparison module 005 are both connected to the first phase AND module 006, the output terminal of the first phase AND module 006 is connected to the first delay module 008; the output terminal of the first delay module 008 is respectively connected to the EN terminal of the first AND module 011, the first counting module 015 and the EN terminal of the second counting module 017, the output terminal of the first NOT module 012 is connected to the first AND module 011, the output terminal of the first AND module 011 and the output terminal of the first switching module 009 are respectively connected to the input terminal and the R terminal of the second delay module 013, the output terminal of the second delay module 013 is sequentially connected to the second pulse module 014 and the Python main model pulverizer blockage 001.

[0032] The Python main model, pulverizer blockage 001, is connected to the first pulse module 010 and the first timeout module 007, respectively. The output of the first timeout module 007 is connected to the EN terminal of the first switching module 009. The outputs of the second pulse module 014 and the third pulse module 020 are connected to the input and R terminals of the second counting module 017, respectively. The output of the second counting module 017 is connected to the fourth greater than comparison module 018. The output of the fourth greater than comparison module 018 is connected to the third timeout module 019. The output of the third timeout module 019 is connected to the third pulse module 020. The outputs of the first pulse module 010 and the third pulse module 020 are connected to the input and R terminals of the first counting module 015, respectively. The output of the first counting module 015 is connected to the third greater than comparison module 016. The output of the third greater than comparison module 016 is connected to the pulverizer blockage warning 021.

[0033] like Figure 2 As shown, in this embodiment, it also includes: The coal mill outlet air-coal mixing temperature 022 and the coal mill outlet air-coal mixing temperature 023 from the previous minute are both connected to the first subtraction module 026. The output of the first subtraction module 026 is connected to the fifth greater than comparison module 028, and the output of the fifth greater than comparison module 028 is connected to the fourth delay module 032. The coal mill outlet air-coal mixing temperature 022 is connected to the sixth greater than comparison module 029, and the output of the sixth greater than comparison module 029 is connected to the fifth delay module 033. The coal mill outlet air-coal mixing temperature 022 and the coal mill outlet air-coal mixing temperature 023 from the previous minute are both connected to the second subtraction module 027. The output of the second subtraction module 027 is connected to the seventh greater than comparison module 030. The output of comparison module 030 is connected to the sixth delay module 034. The output of the sixth delay module 034 and the mill blockage warning 021 are both connected to the second AND module 035. The outputs of the fourth delay module 032, the fifth delay module 033, and the second AND module 035 are all connected to the first OR module 037. The output of coal feed rate 024 is connected to the eighth greater than comparison module 031. The output of the eighth greater than comparison module 031 and the mill roll lowering position 025 are both connected to the third AND module 036. The outputs of the first OR module 037 and the third AND module 036 are both connected to the fourth AND module 038. The output of the fourth AND module 038 is connected to the mill fire warning 039.

[0034] Example 2 like Figure 1 As shown, the data-enabled method for analyzing internal ignition in coal mills of coal-fired power units provided by this invention includes: 1) When the speed of the coal feeder belt motor 002 satisfies the first condition that it is greater than the built-in constant 100 of the comparison module 004 and the current of the coal mill 003 satisfies the second condition that it is greater than the built-in constant 5 of the comparison module 005, and when the built-in constant 30 of the first delay module 008 is satisfied, then after the judgment of the first AND module 011, the second delay module 013, and the second pulse module 014, the call to the Python main model coal mill blockage 001 is obtained.

[0035] 2) When the call to the Python main model coal mill blockage 001 satisfies the built-in constant 3 of the first delay module 007, the built-in constant 8 of the first switching module 009 is triggered, and this signal is output after 8 seconds; conversely, the built-in constant 15 of the first switching module 009 is triggered, and this signal is output after 15 seconds. This function is used to trigger the R terminal of the second delay module 013 to reset the signal calling the Python main model coal mill blockage 001 to 0.

[0036] 3) When the feeder belt motor speed 002 satisfies the first greater than the built-in constant 100 of the comparison module 004 and the coal mill current 003 satisfies the second greater than the built-in constant 5 of the comparison module 005, when the built-in constant 30 of the first delay module 008 is satisfied, the counting function of the first counting module 015 is triggered. The first counting module 015 counts effectively according to the number of triggers of the coal mill blockage 001 of the Python main model called by the input terminal. When the third greater than the built-in constant 3 of the comparison module 016 is satisfied, the coal mill blockage warning 021 is output. When the first counting module 015 needs to be reset, the call to the coal mill blockage 001 of the Python main model needs to satisfy the second counting module 017, the fourth greater than the built-in constant 3 of the comparison module 018, the third delay module 019, and the third pulse module 020 in sequence. Finally, the counting function of the first counting module 015 can be reset to 0, and the coal mill blockage warning 021 also becomes 0.

[0037] like Figure 2 As shown, in this embodiment, it also includes: 1) The first OR module 037 is triggered when any one of the following three conditions is met: the coal mill outlet air-coal mixture temperature 022 and the coal mill outlet air-coal mixture temperature 023 of the previous minute are successively subtracted by the first subtraction module 026, judged by the built-in constant 8 of the fifth greater than comparison module 028, and judged by the built-in constant 10 of the fourth delay module 032; the coal mill outlet air-coal mixture temperature 022 is successively judged by the built-in constant 110 of the sixth greater than comparison module 029 and judged by the built-in constant 10 of the fifth delay module 033; the coal mill outlet air-coal mixture temperature 022 and the coal mill outlet air-coal mixture temperature 023 of the previous minute are successively subtracted by the second subtraction module 027, judged by the built-in constant 5 of the seventh greater than comparison module 030, and judged by the built-in constant 10 of the sixth delay module 034, and the coal mill blockage warning 021 is 1.

[0038] 2) The third module 036 is triggered when any of the following conditions are met: the coal feed rate 024 satisfies the built-in constant 10 of the eighth comparison module 031, and the grinding roller is lowered to position 025 and is 1.

[0039] 3) When the first OR module 037 is 1 and the third AND module 036 is 1, the coal mill fire warning 039 will be output after the fourth AND module 038 makes the judgment.

[0040] Example 3 like Figure 3As shown, through the implementation and application of the technology of this invention in a simulated environment, the historical ignition curve of the pulverizing system was used for verification. When the historical operating condition curve showed "localized combustion," the "fire temperature" began to gradually rise. When the "combustion area expanded," the model's early warning judgment identified that an early warning had been issued, prompting operators to take timely and appropriate measures. This prevented further escalation of the accident and the occurrence of "complete combustion" or "severe combustion," thus ensuring the safety of the equipment.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A data-driven ignition analysis system for the internal combustion chamber of a coal-fired power plant, characterized in that, Includes a first greater than comparison module (004), a second greater than comparison module (005), a first AND module (006), a first timeout delay module (007), a first delay module (008), a first switching module (009), a first pulse module (010), a first AND module (011), a first NOT module (012), a second delay module (013), a second pulse module (014), a first counting module (015), a third greater than comparison module (016), a second counting module (017), and a fourth greater than comparison module (018). 8) Third delay module (019), third pulse module (020), first subtraction module (026), second subtraction module (027), fifth greater than comparison module (028), sixth greater than comparison module (029), seventh greater than comparison module (030), eighth greater than comparison module (031), fourth delay module (032), fifth delay module (033), sixth delay module (034), second AND module (035), third AND module (036), first OR module (037) and fourth AND module (038); The output terminals of the first greater than comparison module (004) and the second greater than comparison module (005) are both connected to the first phase AND module (006). The output terminal of the first phase AND module (006) is connected to the first delay module (008). The output terminal of the first delay module (008) is respectively connected to the EN terminal of the first AND module (011), the first counting module (015), and the EN terminal of the second counting module (017). The output terminal of the first NOT module (012) is connected to the first AND module (011). The output terminals of the first AND module (011) and the first switching module (009) are respectively connected to the input terminal and the R terminal of the second delay module (013). The output terminal of the second delay module (013) is connected to the second pulse module (014). The output of the first delay module (007) is connected to the EN terminal of the first switching module (009); the output of the second pulse module (014) and the output of the third pulse module (020) are respectively connected to the input and R terminals of the second counting module (017), the output of the second counting module (017) is connected to the fourth greater than comparison module (018), the output of the fourth greater than comparison module (018) is connected to the third delay module (019), and the output of the third delay module (019) is connected to the third pulse module (020); the output of the first pulse module (010) and the output of the third pulse module (020) are respectively connected to the input and R terminals of the first counting module (015), and the output of the first counting module (015) is connected to the third greater than comparison module (016). The output of the first subtraction module (026) is connected to the fifth greater than comparison module (028), and the output of the fifth greater than comparison module (028) is connected to the fourth delay module (032); the coal mill outlet air-coal mixing temperature (022) is connected to the sixth greater than comparison module (029), and the output of the sixth greater than comparison module (029) is connected to the fifth delay module (033); the coal mill outlet air-coal mixing temperature (022) and the coal mill outlet air-coal mixing temperature (023) of the previous minute are both connected to the second subtraction module (027), and the output of the second subtraction module (027) is connected to the seventh greater than comparison module (030). The output of the seventh greater than comparison module (030) is connected to the sixth delay module (034), and the output of the sixth delay module (034) and the coal mill blockage early warning (021) are both connected to the second AND module (035); the output of the fourth delay module (032), the fifth delay module (033), and the second AND module (035) are all connected to the first OR module (037); the output of the eighth greater than comparison module (031) is connected to the third AND module (036), and the output of the first OR module (037) and the third AND module (036) are both connected to the fourth AND module (038); The speed of the coal feeder belt motor (002) is connected to the first greater than comparison module (004), and the current of the coal mill (003) is connected to the second greater than comparison module (005). The output of the second delay module (013) is also connected to the Python main model coal mill blockage (001), which is connected to the first pulse module (010) and the first interruption delay module (007) respectively. The output of the third greater than comparison module (016) is connected to the coal mill blockage early warning (021); The coal mill outlet air-coal mixing temperature (022) and the coal mill outlet air-coal mixing temperature (023) in the previous minute are both connected to the first subtraction module (026). The output of the coal feed rate (024) is connected to the eighth comparison module (031), and the grinding roller is lowered to position (025) is connected to the third comparison module (036). The output of the fourth module (038) is connected to the coal mill fire warning (039).

2. A data-driven method for analyzing internal ignition in coal mills of coal-fired power units, characterized in that, This method, based on the data-enabled coal mill internal ignition analysis system of claim 1, includes: When the speed of the coal feeder belt motor (002) satisfies the first condition of being greater than the built-in constant 100 of the comparison module (004) and the current of the coal mill (003) satisfies the second condition of being greater than the built-in constant 5 of the comparison module (005), and when the built-in constant 30 of the first delay module (008) is satisfied, then after the judgment of the first AND module (011), the second delay module (013), and the second pulse module (014), it is determined that the coal mill blockage of the Python main model is called (001). When the Python main model coal mill blockage (001) is called and the built-in constant 3 of the first delay module (007) is satisfied, the built-in constant 8 of the first switching module (009) is triggered. The signal that triggers the built-in constant 8 of the first switching module (009) is output after 8 seconds. Conversely, the built-in constant 15 of the first switching module (009) is triggered. The signal that triggers the built-in constant 15 of the first switching module (009) is output after 15 seconds. This is used to trigger the R terminal of the second delay module (013) and to reset the signal that calls the Python main model coal mill blockage (001) to 0. When the feeder belt motor speed (002) satisfies the first greater than the built-in constant 100 of the comparison module (004) and the pulverizer current (003) satisfies the second greater than the built-in constant 5 of the comparison module (005), and when the built-in constant 30 of the first delay module (008) is satisfied, the counting function of the first counting module (015) is triggered. The first counting module (015) performs effective counting based on the number of times the Python main model pulverizer blockage (001) is called from the input terminal. When the third greater than the comparison module is satisfied, the counting function of the first counting module (005) is triggered. When the built-in constant of block (016) is 3, the mill blockage warning (021) is output. When the first counting module (015) needs to be reset, the Python main model mill blockage (001) needs to satisfy the built-in constant of the second counting module (017), the fourth greater than comparison module (018) 3, the third delay module (019), and the third pulse module (020) in sequence. Finally, the counting function of the first counting module (015) can be reset to 0, and the mill blockage warning (021) will also become 0.

3. The data-enabled method for analyzing internal ignition of coal mills in coal-fired power units according to claim 2, characterized in that, Also includes: The first OR module (037) is triggered when any one of the following three conditions is met: The coal mill outlet air-coal mixture temperature (022) and the coal mill outlet air-coal mixture temperature (023) of the previous minute are successively subtracted by the first subtraction module (026), judged by the built-in constant 8 of the fifth greater than comparison module (028), and judged by the built-in constant 10 of the fourth delay module (032); the coal mill outlet air-coal mixture temperature (022) is successively judged by the built-in constant 110 of the sixth greater than comparison module (029), and judged by the built-in constant 10 of the fifth delay module (033); the coal mill outlet air-coal mixture temperature (022) and the coal mill outlet air-coal mixture temperature (023) of the previous minute are successively subtracted by the second subtraction module (027), judged by the built-in constant 5 of the seventh greater than comparison module (030), and judged by the built-in constant 10 of the sixth delay module (034), while satisfying the coal mill blockage warning (021) of 1; The third AND module (036) is triggered when any one of the following conditions is met: The coal feed rate (024) satisfies the built-in constant 10 of the eighth comparison module (031), and the grinding roller is lowered to position (025) with a value of 1; When the first AND module (037) is 1 and the third AND module (036) is 1, the coal mill fire warning (039) is finally output after the fourth AND module (038) makes the judgment.

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