Ash-gas ratio adjusting method and system based on material level monitoring and blanking temperature

Abstract

The invention discloses an ash-gas ratio adjusting method and system based on material level monitoring and blanking temperature, the system comprises a data acquisition unit, a data processing unit, a data analysis unit, a data storage unit and a control unit, the data acquisition unit is in communication connection with the data storage unit and the data processing unit, and the data analysis unit is in communication connection with the data processing unit. The data processing unit is respectively in communication connection with the data storage unit and the data analysis unit, the data analysis unit is respectively in communication connection with the data storage unit and the control unit, and the control unit is respectively in communication connection with the data acquisition unit, the data storage unit and the data processing unit. According to the invention, accurate ash-gas ratio adjustment can be realized, and the ash-gas ratio adjustment frequency is reduced, so that the potential risk caused by too high ash-gas ratio adjustment frequency is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pneumatic ash conveying control. Specifically, it is an ash-air ratio adjusting method and system based on material level monitoring and material falling temperature. BACKGROUND

[0002] When pneumatic ash conveying is carried out, the staff needs to continuously check the running state of the equipment to ensure that the equipment can run normally. In order to ensure the conveying efficiency, control the energy consumption of the conveying process, and ensure the stability of the ash conveying system, the staff needs to adjust the ash-air ratio in time according to the conveying material condition and the equipment condition. In order to avoid the ash hopper from being full or the material from being insufficient, and in order to avoid the temperature of the material falling pipe being too low or too high, the staff will adjust the ash-air ratio. The staff's adjustment of the ash-air ratio is usually based on work experience, which may cause the ash-air ratio to be adjusted frequently in a short time, and even the ash conveying failure rate may increase due to the adjustment of the ash-air ratio. How to realize accurate ash-air ratio adjustment has become a technical problem that needs to be solved in the industry. SUMMARY

[0003] To this end, the technical problem to be solved by the present application is to provide an ash-air ratio adjusting method and system based on material level monitoring and material falling temperature, which can realize accurate ash-air ratio adjustment and reduce the frequency of ash-air ratio adjustment, thereby reducing the potential risks caused by the high frequency of ash-air ratio adjustment.

[0004] To solve the above technical problems, the present application provides the following technical solutions:

[0005] An ash-air ratio adjusting method based on material level monitoring and material falling temperature, comprising the following steps:

[0006] (S100) Collecting data: collecting the material falling pipe temperature D, the ash hopper material level line L and the ash-air ratio μ in real time;

[0007] (S200) Data preprocessing: performing data cleaning on the collected material falling pipe temperature D, ash hopper material level line L and ash-air ratio μ in period T, and eliminating abnormal data;

[0008] (S300) Data analysis: using the preprocessed data to perform data analysis and determine the adjustment range of the ash-air ratio μ, and the specific steps are as follows:

[0009] (S301) Calculating the time t1 when the ash hopper material level line L is outside the ash hopper material level line threshold range and the time t2 when the material falling pipe temperature D is in the material falling pipe temperature threshold range;

[0010] (S302) Determining the adjustment range of the ash-air ratio μ according to t1 and t2 and a preset working condition parameter adjustment table;

[0011] (S400) Adjust the ash-gas ratio μ according to the adjustment range determined in step S300.

[0012] The above-mentioned ash-to-gas ratio adjustment method based on material level monitoring and material discharge temperature is used when the ash hopper material level line L exceeds the upper limit of the material level threshold L. max Before the duration t1, first calculate the time point at which the ash hopper level L exceeds the upper limit of the level threshold L using the following formula. max Reasonableness:

[0013] ;

[0014] In the formula, This represents the rationality evaluation of the ash hopper level line at time t;

[0015] L indicates the real-time data collection of the ash hopper level line;

[0016] L max This is the preset upper limit of the material level threshold;

[0017] t max This indicates that the material level in the ash hopper has reached L. max The duration from time t to time t;

[0018] c indicates that the ash hopper level line L is greater than L during time period T. max The total number of time periods;

[0019] When L is less than L in the collected data max At that time, the material level rationality is 1.

[0020] In the above-mentioned ash-to-air ratio adjustment method based on material level monitoring and material discharge temperature, in step S302, when determining the adjustment range of the ash-to-air ratio μ according to t1 and t2 and the preset working condition parameter adjustment comparison table, the air supply of the current ash conveying equipment is first evaluated using an air supply degree evaluation model, and then the adjustment range of the ash-to-air ratio μ is determined; wherein, the calculation formula of the air supply degree evaluation model is as follows:

[0021] ;

[0022] In the formula, ΔD is the difference between the current discharge pipe temperature D and the discharge pipe temperature threshold, taken as the absolute value; ΔL is the difference between the current ash hopper level line L and the ash hopper level line threshold, taken as the absolute value; δ d δ represents the average temperature fluctuation of the material discharge pipe under normal operating conditions of the ash conveying equipment. L This represents the average fluctuation of the ash hopper level line under normal operating conditions of the ash conveying equipment.

[0023] The above-mentioned method for adjusting the ash-to-gas ratio based on material level monitoring and material discharge temperature, δ d The result is obtained through the following calculation:

[0024] ;

[0025] γ1+γ2=1;

[0026] wherein γ1 is a weight value related to δ d-T , and the value range is [0.85, 0.96];

[0027] δ d-T is the average value of the change range of the temperature of the drop tube in the current time period T;

[0028] δ d-T0 is the average value of the change range of the temperature of the drop tube before the time period T;

[0029] γ2 is a weight value related to δ d-T0 , and the value range is [0.04, 0.15].

[0030] The ash-gas ratio adjusting method based on the material level monitoring and the drop temperature, δ L is calculated by the following formula:

[0031] ;

[0032] γ3+γ4=1;

[0033] wherein γ3 is a weight value related to δ L-T , and the value range is [0.78, 0.92];

[0034] δ L-T is the average value of the change range of the material level line of the ash bucket in the current time period T;

[0035] δ L-T0 is the average value of the change range of the material level line of the ash bucket before the time period T;

[0036] γ4 is a weight value related to δ L-T0 , and the value range is [0.04, 0.15].

[0037] The ash-gas ratio adjusting method based on the material level monitoring and the drop temperature, when adjusting the ash-gas ratio μ, if the time interval between the current adjustment and the last adjustment is less than the preset adjustment time interval threshold, then the adjustment range is corrected by the following formula on the adjustment range determined in step S302:

[0038] ;

[0039] wherein, is the adjustment range correction value; Δμ is the adjustment range determined in step S302; and σ is the correction coefficient, and the value is [0.82, 0.93].

[0040] A system for adjusting the ash-air ratio by using the ash-air ratio adjustment method based on the material level monitoring and the material dropping temperature, comprising:

[0041] A data acquisition unit for the ash hopper material level line L, the material dropping pipe temperature D and the ash-air ratio mu;

[0042] A data processing unit for data cleaning of the data collected by the data acquisition unit;

[0043] A data analysis unit for analyzing the need for adjusting the ash-air ratio mu according to the data processed by the data processing unit;

[0044] A data storage unit for storing the data collected by the data acquisition unit, the data processed by the data processing unit and the results analyzed by the data analysis unit;

[0045] A control unit for adjusting the ash-air ratio mu;

[0046] The data acquisition unit is in communication connection with the data storage unit and the data processing unit, the data processing unit is in communication connection with the data storage unit and the data analysis unit, and the data analysis unit is in communication connection with the data storage unit and the control unit.

[0047] The system, the control unit is in communication connection with the data acquisition unit, the data storage unit and the data processing unit.

[0048] The system further comprises a visualization unit for displaying the working condition information of the ash conveying equipment, and the visualization unit is in communication connection with the control unit.

[0049] The system, the data storage unit is provided with at least three mutually isolated data storage areas.

[0050] The technical scheme of the present application has the following beneficial technical effects:

[0051] 1. The present application uses the air supply degree evaluation function to adaptively select temperature, material level or both to participate in the adjustment of the ash-air ratio according to the change characteristics of temperature and material level under different working conditions, so as to realize the reduction of compressed air energy consumption while ensuring the stability of the ash conveying.

[0052] 2. By combining the material dropping pipe temperature and the ash hopper material level line, a comprehensive factor affecting the adjustment of the ash-air ratio is formed, so that the adjustment of the ash-air ratio can exclude the abnormality of the material dropping pipe temperature while not causing the material level line to appear abnormal in a short period of time in the future, or excluding the abnormality of the ash hopper material level line while not causing the material dropping pipe temperature to appear abnormal in a short period of time in the future, thereby improving the running stability of the ash conveying system. BRIEF DESCRIPTION OF DRAWINGS

[0053] Figure 1 The working principle diagram of the ash-gas ratio adjusting system based on the material level monitoring and the material falling temperature in the application;

[0054] Figure 2 The flow chart of the ash-gas ratio adjustment in the application. DETAILED DESCRIPTION

[0055] As Figure 1 shown in the application applied to the existing pneumatic ash conveying system based on the material level monitoring and the material falling temperature, the ash-gas ratio adjusting system includes a data acquisition unit, a data processing unit, a data analysis unit, a data storage unit, a control unit and a visualization unit, the data acquisition unit is in communication connection with the data storage unit and the data processing unit respectively, the data processing unit is in communication connection with the data storage unit and the data analysis unit respectively, the data analysis unit is in communication connection with the data storage unit and the control unit respectively, and the control unit is in communication connection with the data acquisition unit, the data storage unit, the data processing unit and the visualization unit respectively.

[0056] In the application, the data acquisition unit is used for collecting the ash hopper material level line L, the material falling pipe temperature D and the ash-gas ratio μ, the data processing unit is used for data cleaning of the data collected by the data acquisition unit, the data analysis unit is used for analyzing the ash-gas ratio μ adjustment requirement according to the data processed by the data processing unit, the data storage unit is used for storing the data collected by the data acquisition unit, the data processed by the data processing unit and the results analyzed by the data analysis unit, at least three mutually isolated data storage areas are provided in the data storage unit to avoid different types of data retrieval errors and to ensure accurate system operation, the control unit is used for ash-gas ratio μ adjustment operation and control of the data acquisition unit, the data storage unit, the data processing unit and the visualization unit, and the visualization unit is used for displaying the ash conveying equipment working condition information.

[0057] As the core parameter in the pneumatic ash conveying system, the ash-gas ratio μ can directly affect the conveying efficiency, energy consumption and system stability. In the case of determining the material characteristics, conveying distance and pipeline characteristics and other factors, the adjustment of the ash-gas ratio μ needs to refer to the change of the variable factors in the pneumatic ash conveying system for operation. In the application, the ash-gas ratio μ is adjusted by referring to the ash hopper material level line L and the material falling pipe temperature D to meet the needs of eliminating the abnormal material level in the ash hopper or the possible abnormality and the abnormal material falling pipe temperature or the possible abnormality.

[0058] Specifically, as Figure 2 shown, the adjustment of the ash-gas ratio μ of the pneumatic ash conveying system is realized by the following steps:

[0059] (S100) Collecting data: collecting the material falling pipe temperature D, the ash hopper material level line L and the ash-gas ratio μ in real time;

[0060] (S200) data preprocessing: the data collected in the period T is cleaned, and the abnormal data is removed;

[0061] (S300) data analysis: the preprocessed data is analyzed to determine the adjustment range of the ash gas ratio μ, and the specific steps are as follows:

[0062] (S301) calculating the time t1 when the ash bucket level line L is outside the threshold range of the ash bucket level line and the time t2 when the blanking pipe temperature D is in the blanking pipe temperature threshold range;

[0063] (S302) determining the adjustment range of the ash gas ratio μ according to t1 and t2 and the preset working condition parameter adjustment table;

[0064] (S400) adjusting the ash gas ratio μ according to the adjustment range determined in step S300.

[0065] In view of the fact that the pneumatic ash conveying system will generate a lot of data about the ash bucket level line L and the blanking pipe temperature D during long-term operation, if these data are repeatedly used in the judgment of the ash gas ratio μ adjustment, it will bring great calculation pressure to the ash gas ratio adjustment system based on the material level monitoring and blanking temperature, and there is a risk of overcorrection, therefore, in the present application, the data in the period of T from the current time is selected for the judgment of the ash gas ratio μ adjustment, the time T can be set by the user according to the actual situation, for example, for a newly put into operation pneumatic ash conveying system, a longer time can be selected, and for a pneumatic ash conveying system that has been put into operation for a period of time, a shorter time can be selected, so that the influence of the data of the pneumatic ash conveying system in the whole good working condition on the data of some equipment when wear occurs can be reduced, and misjudgment can be reduced.

[0066] Because the solid particles conveyed by the pneumatic ash conveying system, the mechanical vibration caused by the operation of the fan, air compressor and valve during the operation of the pneumatic ash conveying system, these vibrations will cause the data collected by the temperature sensor and the material level sensor to move slightly, because these micro-motions are caused by external interference, therefore, the abnormal values caused by interference need to be removed.

[0067] Before removing the abnormal values, the abnormal values need to be judged. Because the mechanical vibration is a transient and high-frequency disturbance, the abnormal values caused by vibration exist for a short time, and often appear as sharp peaks or isolated points, so the abnormal value evaluation is set, when the temperature data at a certain time is higher than the temperature data on both sides, that is, the difference between the temperature data at a certain time and the temperature data before and after it is greater, the abnormal value evaluation at this time is higher, and the probability of this point being an abnormal value is greater,

[0068] ;

[0069] A threshold is set, when P>0.7, then it is determined that the abnormal value is eliminated

[0070] For the collected ash bucket material level line L data, the above method is used to eliminate abnormal values.

[0071] In order to ensure the efficient and stable operation of the pneumatic ash conveying system, it is necessary to keep the material accumulation in the ash bucket within a certain range, that is, the ash bucket material level line L is within a certain threshold range. Once the ash bucket material level line L is outside the threshold range, the ash gas ratio μ may need to be adjusted, but in order to avoid frequent adjustment of the ash gas ratio, in the present application, the duration t1 of the ash bucket material level line L outside the ash bucket material level threshold range is calculated, and when t1 exceeds the threshold, the ash gas ratio μ is adjusted. However, since the ash bucket material level line L will change due to equipment vibration and other conditions, it is necessary to evaluate and judge the reasonableness of the current ash bucket material level line L. Specifically, when calculating the ash bucket material level line L exceeding the upper limit of the material level line threshold L max Before the duration t1, the reasonableness of the ash bucket material level line L exceeding the upper limit of the material level line threshold L max at a certain time point is calculated by the following formula:

[0072] ;

[0073] In the formula, represents the reasonableness evaluation of the ash bucket material level at time t;

[0074] L represents the real-time collected ash bucket material level line;

[0075] L max is the preset upper limit of the material level line threshold;

[0076] t max represents the duration from when the ash bucket material level line L reaches L max to time t;

[0077] c represents the total number of time periods in the T period during which the ash bucket material level line L is greater than L max ;

[0078] When the collected data is L max is less than L , the material level reasonableness is 1.

[0079] When from the start of data collection to time t, if there is collected data L max is greater than L , when is smaller, the time from when the measured ash bucket material level reaches L max to the measured time is shorter, and the total number of time periods in the T period during which the measured ash bucket material level is always greater than L max is smaller, then it is determined that it is a normal fluctuation caused by measurement deviation or initial value error, otherwise, when The greater, the time used from when the ash bucket material level line is measured to when L is measured is longer, and the greater the total number of time periods in which the ash bucket material level line is measured to be greater than L max The greater the total number of time periods in which the ash bucket material level line is measured to be greater than L max The greater the total number of time periods in which the ash bucket material level line is measured to be greater than L

[0080] Through reasonable analysis of the ash bucket material level line, the overall upward trend of the material level line is excluded, the frequent adjustment of the ash gas ratio μ caused by equipment failure is avoided, and the energy consumption of the pneumatic ash conveying system is reduced.

[0081] Since the drop pipe temperature is mainly affected by the compressed air flow and the change in air flow rate, it has a fast response speed and a high change frequency to the ash conveying condition, and can reflect the change in air supply state in a short time; the ash bucket material level reflects the cumulative conveying result of the ash, and has obvious hysteresis, which usually needs a period of time to appear. In a specific case, the ash gas ratio μ can be adjusted according to the drop pipe temperature D or the ash bucket material level L. However, under normal circumstances, the drop pipe temperature D and the ash bucket material level L should be considered comprehensively, that is, according to the difference in time response characteristics of the temperature and the material level, if the two are not judged jointly at a single time, the following two situations may occur: 1) the drop pipe temperature D returns to the normal interval through adjustment of the ash gas ratio μ, while the ash bucket material level L is not in the normal interval; 2) the ash bucket material level L returns to the normal interval through adjustment of the ash gas ratio μ, while the drop pipe temperature D is not in the normal interval. The occurrence of these two situations will lead to misjudgment and frequent adjustment of the ash gas ratio μ, which will further lead to instability of the pneumatic ash conveying system.

[0082] Therefore, in the present application, the Bayesian change point detection method is used to process the drop pipe temperature sequence online, the temperature change point is automatically identified through probability inference of the change in temperature statistical characteristics, and the time period between adjacent change points is taken as a time window in which the temperature change trend is relatively consistent. In each time window, the temperature change trend remains relatively stable, thereby providing a reliable time scale basis for subsequent joint analysis.

[0083] The temperature data and the ash bucket material level data are divided synchronously based on the time window, so that each temperature data corresponds to a material level data, and the two types of data are jointly analyzed within the time window scale. Since the absolute values of the temperature and the material level are easily affected by environmental conditions, sensor installation deviation and long-term drift, etc., it is difficult to serve as a unified reliable control basis, the present application uses the temperature change amount and the material level change amount as the criterion for adjusting the ash gas ratio.

[0084] Meanwhile, in order to distinguish the real working condition change from the normal fluctuation, the historical running data of the ash conveying system in the stable ash conveying and the air supply in the reasonable range are selected, the historical temperature data and the ash bucket level data are divided by time window, the temperature change and the level change in each time window are calculated respectively, and the distribution characteristics are counted, and the maximum value of the change in the stable working condition is taken as the corresponding change not obvious threshold. When the temperature change or the level change in the real-time running process does not exceed the threshold, it is determined that it is normal fluctuation, and the ash gas ratio regulation is not triggered; when the change exceeds the threshold, it is determined that the ash conveying working condition has actually changed, and the air supply is adjusted accordingly.

[0085] By setting the change not obvious threshold, the slight fluctuation and the measurement noise are effectively distinguished from the real working condition change, and the ash gas ratio regulation is triggered only when the change exceeds the threshold, so that the false regulation and system oscillation caused by signal jitter are avoided.

[0086] Therefore, in step S302, when determining the ash gas ratio μ adjustment range according to t1 and t2 and the preset working condition parameter adjustment reference table, the air supply degree evaluation model is used to evaluate the air supply of the current ash conveying equipment first, and then the ash gas ratio μ adjustment range is determined; wherein the calculation formula of the air supply degree evaluation model is as follows:

[0087] ;

[0088] In the formula, ΔD is the difference between the current drop pipe temperature D and the drop pipe temperature threshold, and the absolute value is taken; ΔL is the difference between the current ash bucket level line L and the ash bucket level line threshold, and the absolute value is taken; δ d is the drop pipe temperature fluctuation average under the normal working condition of the ash conveying equipment; δ L is the ash bucket level line fluctuation average under the normal working condition of the ash conveying equipment.

[0089] Wherein, is a Sigmoid activation function, which maps the value to 0-1, and the smaller ΔD is, the more stable the drop pipe temperature change in this window is, and tanh(ΔL) is a Tanh function, which maps the value to-1-1, when the level line shows an upward trend or no obvious change, ΔL≤0, tanh(ΔL)≤0, when the level line shows a downward trend, ΔL>0, tanh(ΔL)>0.

[0090] In consideration of the influence of environmental temperature change and drop pipe self-loss and other factors, in order to realize more accurate regulation control, δ d is segmented and recombined for calculation, so that δ d used in the current ash gas ratio μ regulation is more referential, specifically, δ d is calculated by the following formula:

[0091] ;

[0092] γ1+γ2=1;

[0093] wherein γ1 is a weight value related to δ d-T is a weight value related to δ

[0094] δ d-T is the average value of the change range of the drop tube temperature in the current time period T;

[0095] δ d-T0 is the average value of the change range of the drop tube temperature before the time period T;

[0096] γ2 is a weight value related to δ d-T0 is a weight value related to δ

[0097] Similarly, δ L is calculated by the following formula:

[0098] ;

[0099] γ3+γ4=1;

[0100] wherein γ3 is a weight value related to δ L-T is a weight value related to δ

[0101] δ L-T is the average value of the change range of the ash bin level in the current time period T;

[0102] δ L-T0 is the average value of the change range of the ash bin level before the time period T;

[0103] γ4 is a weight value related to δ L-T0 is a weight value related to δ

[0104] Based on the division and recombination calculation of δ d and δ L on the time period, more attention can be paid to the current equipment condition and environmental condition when adjusting the ash gas ratio μ, and the influence of equipment wear and tear and environmental changes on the ash bin level L and the drop tube temperature D is avoided. At the same time, the historical data before the time period T is introduced, and the influence of the characteristics of the equipment itself and the running inertia of the system are considered, so as to ensure that each adjustment of the ash gas ratio μ can be maintained for a long time, and the frequency of adjusting the ash gas ratio μ is reduced.

[0105] In view of the certain fluctuation that will occur in the pneumatic ash conveying system after the adjustment of the ash-air ratio μ, for example, the ash hopper level line will suddenly appear a larger amplitude decrease or the decrease amplitude will obviously become smaller, and then the change amplitude of the ash hopper level line will enter a stable period, in order to reduce the influence of such fluctuation on the subsequent adjustment of the ash-air ratio μ, when the time interval between the present adjustment and the last adjustment is less than the preset adjustment time interval threshold value, the adjustment amplitude determined in step S302 is corrected by the following formula:

[0106] ;

[0107] In the formula, is the adjustment amplitude correction value; Δμ is the adjustment amplitude determined in step S302; σ is the correction coefficient, and the value is [0.82, 0.93].

[0108] In the present application, the preset adjustment time interval threshold value is set by the enterprise technical personnel according to the enterprise's own situation.

[0109] In the present application, when and , it indicates that the air supply state has changed significantly, and the change has been reflected in the ash hopper level. At this time, the joint evaluation method of temperature change amount and level change amount is adopted, wherein tanh(ΔL) is used to determine the air supply adjustment direction, is used to determine the adjustment strength, so as to realize the fine adjustment of the ash-air ratio.

[0110] When and , it indicates that the air supply has changed, but the change has not been reflected in the level, which is in the transition stage of the ash conveying process. At this time, only the temperature change amount is used to adjust the air supply, so as to improve the response speed of the system to the change of the air supply and avoid the situation of insufficient or excessive air supply.

[0111] When and , it indicates that the temperature change is relatively flat, but the ash hopper level has changed significantly, and the ash conveying effect deviates. At this time, the air supply is adjusted according to the level change trend, so as to ensure the stability of the ash conveying process and prevent the problems of ash blocking or decrease of the ash conveying efficiency.

[0112] When and , it indicates that the system running state is stable, and the ash-air ratio is in a reasonable interval, and the air supply is not adjusted, so as to avoid the system oscillation caused by frequent adjustment.

[0113] In brief, when both temperature and material level change significantly, it indicates that the change of air supply has actually affected the effect of ash conveying, and the fine adjustment of ash-air ratio should be combined with the direction of material level change and the amplitude of temperature change; when only temperature changes significantly and material level has not responded, it indicates that the system is in a transition stage, and the air supply should be adjusted quickly according to the temperature change; when only material level changes significantly and temperature changes gently, it indicates that the effect of ash conveying has deviated, and the bottom adjustment should be made according to the material level change; and when neither temperature nor material level changes significantly, the system runs stably, the ash-air ratio is in a reasonable range, and the air supply does not need to be adjusted, so as to avoid unnecessary control disturbance.

[0114] Through the air supply degree evaluation function defined by the above segmentation, according to the change characteristics of temperature and material level under different working conditions, temperature, material level or both are adaptively selected to participate in the adjustment of ash-air ratio, so as to ensure the stability of ash conveying while reducing the energy consumption of compressed air.

[0115] Obviously, the above embodiments are only examples for clearly illustrating, but not limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the patent application claims.

Claims

1. A method for adjusting the ash-to-gas ratio based on material level monitoring and material discharge temperature, characterized in that, Includes the following steps: (S100) Data Acquisition: Real-time acquisition of material discharge pipe temperature D, ash hopper material level line L, and ash-to-air ratio μ; (S200) Data preprocessing: Clean the data collected within time period T, including the temperature D of the discharge pipe, the level line L of the ash hopper, and the ash-to-air ratio μ, and remove abnormal data. (S300) Data Analysis: Utilize the preprocessed data to perform data analysis and determine the adjustment range of the ash-to-gas ratio μ. The specific steps are as follows: (S301) Calculate the duration t1 when the ash hopper level line L is outside the threshold range of the ash hopper level line and the duration t2 when the discharge pipe temperature D is within the threshold range of the discharge pipe temperature. (S302) Determine the adjustment range of the ash-gas ratio μ based on t1 and t2 and the preset working condition parameter adjustment table; (S400) Adjust the ash-gas ratio μ according to the adjustment range determined in step S300.

2. The ash-to-gas ratio adjustment method based on material level monitoring and material discharge temperature according to claim 1, characterized in that, When the ash hopper level line L exceeds the upper limit of the level line threshold L... max Before the duration t1, first calculate the time point at which the ash hopper level L exceeds the upper limit of the level threshold L using the following formula. max Reasonableness: ； In the formula, This represents the rationality evaluation of the ash hopper level line at time t; L indicates the real-time data collection of the ash hopper level line; L max This is the preset upper limit of the material level threshold; t max This indicates that the material level in the ash hopper has reached L. max The duration from time t to time t; c indicates that the ash hopper level line L is greater than L during time period T. max The total number of time periods; When L is less than L in the collected data max At that time, the material level rationality is 1.

3. The ash-to-gas ratio adjustment method based on material level monitoring and material discharge temperature according to claim 1, characterized in that, In step S302, when determining the adjustment range of the ash-to-gas ratio μ based on t1 and t2 and the preset operating condition parameter adjustment comparison table, the air supply of the current ash conveying equipment is first evaluated using the air supply level evaluation model, and then the adjustment range of the ash-to-gas ratio μ is determined; wherein, the calculation formula of the air supply level evaluation model is as follows: ； In the formula, ΔD is the difference between the current discharge pipe temperature D and the discharge pipe temperature threshold, taken as the absolute value; ΔL is the difference between the current ash hopper level line L and the ash hopper level line threshold, taken as the absolute value; δ d δ represents the average temperature fluctuation of the material discharge pipe under normal operating conditions of the ash conveying equipment. L This represents the average fluctuation of the ash hopper level line under normal operating conditions of the ash conveying equipment.

4. The ash-to-gas ratio adjustment method based on material level monitoring and material discharge temperature according to claim 3, characterized in that, δ d The result is obtained through the following calculation: ； γ1 + γ2 = 1; In the formula, γ1 is related to δ d-T The relevant weight values ​​range from [0.85, 0.96]. δ d-T This represents the average temperature variation of the feed pipe within the current time period T. δ d-T0 This represents the average temperature variation of the feed pipe before time period T. γ2 is related to δ d-T0 The relevant weight values ​​range from [0.04, 0.15].

5. The ash-to-gas ratio adjustment method based on material level monitoring and material discharge temperature according to claim 3, characterized in that, δ L The result is obtained through the following calculation: ； γ3 + γ4 = 1; In the formula, γ3 is related to δ L-T The relevant weight values ​​range from [0.78, 0.92]. δ L-T This represents the average change in the ash hopper level within the current time period T. δ L-T0 This represents the average change in the ash hopper level before time period T. γ4 is related to δ L-T0 The relevant weight values ​​range from [0.04, 0.15].

6. The method for adjusting the ash-to-gas ratio based on material level monitoring and material discharge temperature according to claim 1, characterized in that, When adjusting the ash-to-gas ratio μ, if the time interval between the current adjustment and the previous adjustment is less than a preset adjustment time interval threshold, the adjustment range determined in step S302 is corrected using the following formula: ； In the formula, Δμ is the adjustment range correction value; Δμ is the adjustment range determined in step S302; σ is the correction coefficient, with a value of [0.82, 0.93].

7. A system for adjusting the ash-gas ratio using the ash-gas ratio adjustment method based on material level monitoring and material discharge temperature as described in claim 1, characterized in that, include: The data acquisition unit is used to measure the ash hopper level line L, the discharge pipe temperature D, and the ash-to-air ratio μ. The data processing unit is used to clean the data collected by the data acquisition unit. The data analysis unit is used to adjust the ash-to-gas ratio μ according to the data analysis results processed by the data processing unit. The data storage unit is used to store the data collected by the data acquisition unit, the data processed by the data processing unit, and the results obtained by the data analysis unit. Control unit, used for adjusting the ash-to-gas ratio μ; The data acquisition unit is communicatively connected to the data storage unit and the data processing unit, the data processing unit is communicatively connected to the data storage unit and the data analysis unit, and the data analysis unit is communicatively connected to the data storage unit and the control unit.

8. The system according to claim 7, characterized in that, The control unit is communicatively connected to the data acquisition unit, data storage unit, and data processing unit.

9. The system according to claim 7, characterized in that, It also includes a visualization unit for displaying the operating status information of the ash conveying equipment, and the visualization unit is communicatively connected to the control unit.

10. The system according to claim 7, characterized in that, The data storage unit has at least three mutually isolated data storage areas.

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