A boiler combustion intelligent control method for an industrial pulverized coal boiler

Abstract

The application discloses a kind of boiler combustion intelligent control method for industrial pulverized coal boiler, specifically related to boiler combustion control technical field, including step S01: industrial pulverized coal boiler number, step S02: industrial pulverized coal boiler combustion data acquisition, step S03: industrial pulverized coal boiler combustion optimization control, step S04: industrial pulverized coal boiler combustion safety monitoring, step S05: industrial pulverized coal boiler combustion reliability analysis, step S06: industrial pulverized coal boiler combustion reliability evaluation, the application is by combustion efficiency deviation index, carry out boiler combustion efficiency abnormal response, it is favorable to find abnormal situation in the process of combustion in time, improve the intelligent control of boiler combustion efficiency monitoring, calculate boiler combustion safety monitoring index, take hierarchical response measures, ensure that different risk levels of boiler combustion state are handled, by the priority of boiler combustion reliability control coefficient, improve the timeliness of boiler treatment and combustion efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boiler combustion control, more particularly, the present application relates to a boiler combustion intelligent control method for industrial pulverized coal boilers. BACKGROUND

[0002] With the continuous improvement of productivity, the demand for energy gradually increases, thermal power generation is an important source of electricity, by making the coal powder into the boiler for full combustion, not only in the economy, improve the use of coal powder raw material, reduce the consumption of energy, and in the ecological environment, the full combustion of coal powder inhibits the generation of environmental pollutants, reduces the pollution to the environment.

[0003] In practice, using intelligent control technology, integrating advanced sensor technology, real-time monitoring data can optimize the combustion process, realize efficient and clean combustion of coal powder, which is of great significance to promote the sustainable development of industrial production.

[0004] However, in actual use, there are still some shortcomings, such as the existing boiler operation control process, the intelligent control share is low, most of which still rely on manual experience for operation and adjustment, it is difficult to realize the rapid and accurate control of fuel, oxygen, air distribution, and grinding process, resulting in insufficient stability and reliability of the intelligent control system;

[0005] The existing boiler combustion control method has insufficient control precision and stability for the boiler combustion process, which leads to unstable combustion process, thereby delaying the safety risk early warning of the boiler combustion, and increasing the safety risk. SUMMARY

[0006] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present application provide a boiler combustion intelligent control method for industrial pulverized coal boilers, which is used to solve the problems proposed in the background art.

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme: a boiler combustion intelligent control method for industrial pulverized coal boilers, comprising the following steps:

[0008] Step S01: industrial pulverized coal boiler number: used for acquiring the number of industrial pulverized coal boilers of the target enterprise, and sequentially numbering each industrial pulverized coal boiler of the target enterprise as 1, 2,... i,... n;

[0009] Step S02: industrial pulverized coal boiler combustion data collection: used for collecting the combustion data of each industrial pulverized coal boiler of the target enterprise, the step S02: industrial pulverized coal boiler combustion data collection includes a boiler combustion efficiency data collection sub-step and a boiler combustion operation data collection sub-step;

[0010] Step S03: Industrial coal-fired boiler combustion optimization control: for collecting the boiler combustion efficiency data collected by the boiler combustion efficiency data collection sub-step, calculating the boiler combustion efficiency deviation index of each industrial coal-fired boiler, and performing abnormal response of the boiler combustion efficiency;

[0011] Step S04: Industrial coal-fired boiler combustion safety monitoring: for collecting the boiler combustion operation data collected by the boiler combustion operation data collection sub-step, calculating the boiler combustion safety monitoring index of each industrial coal-fired boiler, and controlling the safety of the boiler combustion state;

[0012] Step S05: Industrial coal-fired boiler combustion reliability analysis: for calculating the boiler combustion reliability control coefficient of each industrial coal-fired boiler according to the boiler combustion efficiency deviation index and the boiler combustion safety monitoring index of each industrial coal-fired boiler;

[0013] Step S06: Industrial coal-fired boiler combustion reliability evaluation: for obtaining the boiler combustion reliability control coefficient of each industrial coal-fired boiler, arranging according to the value of the boiler combustion reliability control coefficient, and evaluating the boiler combustion performance.

[0014] Preferably, in step S02, the industrial coal-fired boiler combustion data collection specifically includes:

[0015] Boiler combustion efficiency data collection sub-step: collecting the boiler combustion efficiency and combustion time of each industrial coal-fired boiler of the target enterprise, and marking them as 、 , wherein i = 1, 2,... n, i represents the number of the i-th industrial coal-fired boiler;

[0016] Boiler combustion operation data collection sub-step: collecting the top furnace temperature and bottom furnace temperature of each industrial coal-fired boiler of the target enterprise by a thermocouple, marking them as 、 , collecting the coal powder grinding particle size of each industrial coal-fired boiler of the target enterprise by a laser particle size analyzer, marking it as , and collecting the flame brightness of each industrial coal-fired boiler of the target enterprise by an industrial endoscope and a high-speed camera, marking it as .

[0017] Preferably, the calculation formula of the boiler combustion efficiency deviation index is:

[0018] ;

[0019] wherein represents the boiler combustion efficiency deviation index of the i-th industrial coal-fired boiler, represents the boiler combustion efficiency of the i-th industrial coal-fired boiler, represents the preset boiler combustion efficiency, represents the combustion time of the i th industrial pulverized coal boiler;

[0020] The abnormal response of the boiler combustion efficiency is specifically:

[0021] The boiler combustion efficiency stability index of each industrial pulverized coal boiler is evaluated by the boiler combustion efficiency deviation index:

[0022]

[0023] wherein, represents the boiler combustion efficiency deviation index of the i th industrial pulverized coal boiler, represents the influence factor of the boiler combustion efficiency deviation index, represents the boiler combustion efficiency deviation index of the i-1 th industrial pulverized coal boiler;

[0024] The boiler combustion efficiency stability index of each industrial pulverized coal boiler is obtained, and compared with the preset boiler combustion efficiency stability index. If the boiler combustion efficiency stability index of a certain industrial pulverized coal boiler is greater than the preset boiler combustion efficiency stability index, it indicates that the fluctuation degree of the combustion efficiency of the industrial pulverized coal boiler is larger, and the management personnel should be notified for abnormal maintenance of the boiler. Otherwise, it indicates that the fluctuation degree of the combustion efficiency of the industrial pulverized coal boiler is smaller, and the combustion efficiency is stable.

[0025] Preferably, the boiler combustion efficiency is specifically:

[0026] S31: Calculate the flue gas heat loss:

[0027]

[0028] wherein, represents the flue gas heat loss of the i th industrial pulverized coal boiler, represents the flue gas volume of the i th industrial pulverized coal boiler, represents the average specific heat capacity of flue gas of the i th industrial pulverized coal boiler, represents the flue gas temperature of the i th industrial pulverized coal boiler, represents the ambient temperature, and qh represents the low calorific value of coal, which is 23000;

[0029] S32: Calculate the unburned carbon loss:

[0030]

[0031] wherein, represents the unburned carbon loss of the i th industrial pulverized coal boiler, represents the fuel ash of the i th industrial pulverized coal boiler, ​​​Carbon content of fly ash of the i-th industrial pulverized coal boiler, Carbon content of slag of the i-th industrial pulverized coal boiler, ru represents the heat value of carbon, and is 337;

[0032] S33: Calculate the heat loss:

[0033] ;

[0034] wherein, Heat loss of the i-th industrial pulverized coal boiler, Boiler evaporation capacity of the i-th industrial pulverized coal boiler, Boiler rated evaporation capacity;

[0035] S34: Calculate the boiler combustion efficiency:

[0036] ;

[0037] wherein, Boiler combustion efficiency of the i-th industrial pulverized coal boiler, Flue gas heat loss of the i-th industrial pulverized coal boiler, Unburned carbon loss of the i-th industrial pulverized coal boiler, Heat loss of the i-th industrial pulverized coal boiler.

[0038] Preferably, in the step S04, the industrial pulverized coal boiler combustion safety monitoring specifically comprises:

[0039] S41: Calculate the pulverized coal combustion uniformity index of each industrial pulverized coal boiler by the furnace top temperature, the furnace bottom temperature, and the pulverized coal grinding particle size:

[0040] ;

[0041] wherein, Pulverized coal combustion uniformity index of the i-th industrial pulverized coal boiler, Furnace top temperature of the i-th industrial pulverized coal boiler, Furnace bottom temperature of the i-th industrial pulverized coal boiler, Pulverized coal grinding particle size of the i-th industrial pulverized coal boiler, Pre-set pulverized coal grinding particle size, Allowed deviation of the pulverized coal grinding particle size from the pre-set pulverized coal grinding particle size;

[0042] S42: Extract the flame brightness of each industrial pulverized coal boiler of the target enterprise, and calculate the mean value and the standard deviation of the flame brightness of each industrial pulverized coal boiler, marked as , ;

[0043] S43: the calculation formula of the boiler combustion safety monitoring index is:

[0044] ;

[0045] wherein, represents the boiler combustion safety monitoring index of the i-th industrial coal powder boiler, represents the mean value of flame brightness, represents the standard deviation of flame brightness, e represents the natural constant, represents the coal powder combustion uniformity index of the i-th industrial coal powder boiler;

[0046] S44: obtaining the boiler combustion safety monitoring index of each industrial coal powder boiler, comparing the boiler combustion safety monitoring index with the preset range of the classification response of the boiler combustion safety monitoring index, if the boiler combustion safety monitoring index of a certain industrial coal powder boiler is greater than the maximum value of the preset range of the classification response of the boiler combustion safety monitoring index, it indicates that the combustion state of the industrial coal powder boiler is dangerous, and the speed of the coal feeder of the industrial coal powder boiler needs to be reduced, and the load is automatically reduced, if the boiler combustion safety monitoring index of a certain industrial coal powder boiler is less than or equal to the maximum value of the preset range of the classification response of the boiler combustion safety monitoring index, and greater than the minimum value of the preset range of the classification response of the boiler combustion safety monitoring index, it indicates that the combustion state of the industrial coal powder boiler has a safety hazard, and the air-coal ratio of the industrial coal powder boiler needs to be adjusted to suppress the combustion non-uniformity, if the boiler combustion safety monitoring index of a certain industrial coal powder boiler is less than or equal to the minimum value of the preset range of the classification response of the boiler combustion safety monitoring index, it indicates that the combustion state of the industrial coal powder boiler is safe.

[0047] Preferably, the calculation formula of the boiler combustion reliability control coefficient is:

[0048] ;

[0049] wherein, represents the boiler combustion reliability control coefficient of the i-th industrial coal powder boiler, represents the boiler combustion efficiency deviation index of the i-th industrial coal powder boiler, represents the preset boiler combustion efficiency deviation index, represents the boiler combustion safety monitoring index of the i-th industrial coal powder boiler, represents the minimum value of the boiler combustion safety monitoring index, represents the maximum value of the boiler combustion safety monitoring index.

[0050] Preferably, in the step S06, the industrial coal powder boiler combustion reliability evaluation is specifically:

[0051] The boiler combustion reliability control coefficient of each industrial coal powder boiler is obtained, a priority sequence of the boilers of the target enterprise is generated in descending order of the boiler combustion reliability control coefficient, the industrial coal powder boilers of the target enterprise are rearranged according to the sequence, the boilers with larger boiler combustion reliability control coefficient values are subjected to combustion safety early warning, and the boilers with larger boiler combustion reliability control coefficient values are given the minimum priority of boiler combustion.

[0052] The technical effects and advantages of the present application are as follows:

[0053] 1. The present application provides a boiler combustion intelligent control method for industrial coal powder boilers, which calculates the exhaust gas heat loss, unburned carbon loss and heat loss of each industrial coal powder boiler, calculates the boiler combustion efficiency, further calculates the boiler combustion efficiency deviation index of each industrial coal powder boiler, evaluates the boiler combustion efficiency stability index of each industrial coal powder boiler, compares the boiler combustion efficiency stability index with the preset boiler combustion efficiency stability index, and if the boiler combustion efficiency stability index of a certain industrial coal powder boiler is greater than the preset boiler combustion efficiency stability index, it indicates that the fluctuation degree of the combustion efficiency of the industrial coal powder boiler is larger, and the management personnel should be notified to perform abnormal maintenance of the boiler, otherwise, it indicates that the fluctuation degree of the combustion efficiency of the industrial coal powder boiler is smaller, and the combustion efficiency is stable, the combustion efficiency of the boiler is accurately quantified, the fluctuation of the combustion efficiency of the target enterprise boiler can be dynamically monitored, the abnormal fluctuation in the combustion process can be found in time, and the intelligent control of the boiler combustion efficiency monitoring is improved.

[0054] 2, The present application provides a kind of for industrial pulverized coal boiler boiler combustion intelligent control method, the boiler combustion operating data of the operating data acquisition substep of being collected, the safety monitoring index of each industrial pulverized coal boiler boiler combustion is calculated, by comparison with the safety monitoring index of boiler combustion classified response preset range, if the safety monitoring index of boiler combustion of certain industrial pulverized coal boiler is greater than the maximum value of safety monitoring index of boiler combustion classified response preset range, it indicates that the combustion state of the industrial pulverized coal boiler exists danger, needs to reduce the speed of coal feeder of the industrial pulverized coal boiler, automatically reduce load, if the safety monitoring index of boiler combustion of certain industrial pulverized coal boiler is less than or equal to the maximum value of safety monitoring index of boiler combustion classified response preset range, greater than the minimum value of safety monitoring index of boiler combustion classified response preset range, it indicates that the combustion state of the industrial pulverized coal boiler exists security risk, needs to adjust the air-coal ratio of the industrial pulverized coal boiler, inhibit combustion unevenness, if the safety monitoring index of boiler combustion of certain industrial pulverized coal boiler is less than or equal to the minimum value of safety monitoring index of boiler combustion classified response preset range, it indicates that the combustion state of the industrial pulverized coal boiler is safe, by taking classified response measures, it is favorable to ensure that the boiler combustion state in different risk levels is handled correspondingly, improve the safety and stability of boiler combustion control, it is favorable to improve the uniformity of boiler combustion, by the safety monitoring index of boiler combustion and the safety monitoring index of boiler combustion of each industrial pulverized coal boiler, the reliability control coefficient of each industrial pulverized coal boiler boiler combustion is calculated, the boiler of target enterprise is generated priority sequence according to the order of the value of the reliability control coefficient of boiler combustion from big to small, according to the order after arrangement, the industrial pulverized coal boiler of target enterprise is rearranged, the greater the value of the reliability control coefficient of boiler combustion, the greater the safety early warning of the boiler, the greater the value of the reliability control coefficient of boiler combustion, the minimum priority of boiler combustion is given, by giving the minimum priority of the boiler with greater reliability control coefficient of boiler combustion, the safety risk of boiler operation can be effectively reduced, it is favorable to ensure that the maximum priority of boiler combustion obtains best combustion state, improve the timeliness and combustion efficiency of boiler treatment. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 It is a flowchart for the present application for industrial pulverized coal boiler boiler combustion intelligent control method.

[0056] Figure 2 It is the structure diagram of the present application in step S02 industrial pulverized coal boiler combustion data acquisition. DETAILED DESCRIPTION

[0057] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0058] Please refer to Figure 1 As shown in the figure, the present application provides a boiler combustion intelligent control method for industrial pulverized coal boiler, comprising the following steps:

[0059] The step S01: industrial pulverized coal boiler number: for obtaining the number of industrial pulverized coal boilers of the target enterprise, and sequentially numbering each industrial pulverized coal boiler of the target enterprise as 1, 2,... i,... n;

[0060] Please refer to Figure 2 As shown in the figure, the step S02: industrial pulverized coal boiler combustion data collection: for collecting the combustion data of each industrial pulverized coal boiler of the target enterprise, the step S02: industrial pulverized coal boiler combustion data collection includes a boiler combustion efficiency data collection sub-step and a boiler combustion operation data collection sub-step, and the combustion data includes boiler combustion efficiency data and boiler combustion operation data.

[0061] In a possible design, the step S02: industrial pulverized coal boiler combustion data collection is specifically:

[0062] The boiler combustion efficiency data collection sub-step: collecting the boiler combustion efficiency and the combustion time of each industrial pulverized coal boiler of the target enterprise, and marking them as , respectively, wherein i=1, 2,... n, and i represents the number of the i th industrial pulverized coal boiler;

[0063] The boiler combustion operation data collection sub-step: collecting the top furnace temperature and the bottom furnace temperature of each industrial pulverized coal boiler of the target enterprise through a thermocouple, and marking them as , , collecting the coal powder grinding particle size of each industrial pulverized coal boiler of the target enterprise through a laser particle size analyzer, and marking it as , and collecting the flame brightness of each industrial pulverized coal boiler of the target enterprise through an industrial endoscope and a high-speed camera, and marking it as .

[0064] The step S03: industrial pulverized coal boiler combustion optimization control: for receiving the combustion data transmitted by the step S02: industrial pulverized coal boiler combustion data collection, calculating the boiler combustion efficiency deviation index of each industrial pulverized coal boiler according to the boiler combustion efficiency data collected by the boiler combustion efficiency data collection sub-step, and performing boiler combustion efficiency abnormal response.

[0065] In one possible design, the formula for calculating the boiler combustion efficiency deviation index is:

[0066] ;

[0067] in, Let be the boiler combustion efficiency deviation index for the i-th industrial pulverized coal boiler. Let be the boiler combustion efficiency of the i-th industrial pulverized coal boiler. This represents the preset boiler combustion efficiency. This represents the combustion time of the i-th industrial pulverized coal boiler;

[0068] The specific response to the abnormal boiler combustion efficiency is as follows:

[0069] The boiler combustion efficiency stability index of various industrial pulverized coal boilers is evaluated using the boiler combustion efficiency deviation index.

[0070] ;

[0071] in, Let be the boiler combustion efficiency deviation index for the i-th industrial pulverized coal boiler. This is expressed as an influencing factor of the boiler combustion efficiency deviation index. This represents the boiler combustion efficiency deviation index of the (i-1)th industrial pulverized coal boiler.

[0072] Obtain the boiler combustion efficiency stability index of each industrial pulverized coal boiler and compare it with the preset boiler combustion efficiency stability index. If the boiler combustion efficiency stability index of a certain industrial pulverized coal boiler is greater than the preset boiler combustion efficiency stability index, it indicates that the combustion efficiency of the industrial pulverized coal boiler fluctuates greatly, and the management personnel should be notified to carry out abnormal boiler maintenance. Conversely, it indicates that the combustion efficiency of the industrial pulverized coal boiler fluctuates less and the combustion efficiency is stable.

[0073] In one possible design, the boiler combustion efficiency is specifically:

[0074] S31: Calculate the heat loss from flue gas exhaust:

[0075] ;

[0076] in, Let represent the flue gas heat loss of the i-th industrial pulverized coal boiler. Let represent the flue gas volume of the i-th industrial pulverized coal boiler. Let be the average specific heat capacity of the flue gas from the i-th industrial pulverized coal boiler. Let represent the exhaust gas temperature of the i-th industrial pulverized coal boiler. The ambient temperature is represented by qh, the low calorific value of coal is represented by 23000;

[0077] S32: Calculate the unburned carbon loss:

[0078] ;

[0079] Wherein, The unburned carbon loss of the i th industrial pulverized coal boiler is represented by The fuel ash of the i th industrial pulverized coal boiler is represented by The carbon content of fly ash of the i th industrial pulverized coal boiler is represented by The carbon content of slag of the i th industrial pulverized coal boiler is represented by ru, and the calorific value of carbon is 337;

[0080] S33: Calculate the heat loss:

[0081] ;

[0082] Wherein, The heat loss of the i th industrial pulverized coal boiler is represented by The boiler evaporation capacity of the i th industrial pulverized coal boiler is represented by The rated evaporation capacity of the boiler is represented by

[0083] S34: Calculate the boiler combustion efficiency:

[0084] ;

[0085] Wherein, The boiler combustion efficiency of the i th industrial pulverized coal boiler is represented by The exhaust gas heat loss of the i th industrial pulverized coal boiler is represented by The unburned carbon loss of the i th industrial pulverized coal boiler is represented by The heat loss of the i th industrial pulverized coal boiler is represented by

[0086] The step S04: industrial pulverized coal boiler combustion safety monitoring: for receiving the combustion data of step S02: industrial pulverized coal boiler combustion data collection and transmission, according to the boiler combustion operation data collected by the boiler combustion operation data collection substep, calculating the boiler combustion safety monitoring index of each industrial pulverized coal boiler, controlling the safety of the boiler combustion state.

[0087] In one possible design, in the step S04, the industrial pulverized coal boiler combustion safety monitoring is specifically:

[0088] S41: Calculate the pulverized coal combustion uniformity index of each industrial pulverized coal boiler by the furnace top temperature, the furnace bottom temperature and the pulverized coal grinding particle size:

[0089] ;

[0090] wherein, represents the coal powder combustion uniformity index of the i th industrial coal powder boiler, represents the top temperature of the furnace of the i th industrial coal powder boiler, represents the bottom temperature of the furnace of the i th industrial coal powder boiler, represents the coal powder grinding particle size of the i th industrial coal powder boiler, represents the preset coal powder grinding particle size, represents the allowable deviation of the coal powder grinding particle size from the preset coal powder grinding particle size;

[0091] S42: Extract the flame brightness of each industrial coal powder boiler of the target enterprise, calculate the mean value and standard deviation of the flame brightness of each industrial coal powder boiler, and mark them as 、 ;

[0092] S43: The calculation formula of the boiler combustion safety monitoring index is:

[0093] ;

[0094] wherein, represents the boiler combustion safety monitoring index of the i th industrial coal powder boiler, represents the mean value of the flame brightness, represents the standard deviation of the flame brightness, and e represents the natural constant, represents the coal powder combustion uniformity index of the i th industrial coal powder boiler;

[0095] S44: Obtain the boiler combustion safety monitoring index of each industrial coal powder boiler, compare it with the preset range of the boiler combustion safety monitoring index grading response, if the boiler combustion safety monitoring index of a certain industrial coal powder boiler is greater than the maximum value of the preset range of the boiler combustion safety monitoring index grading response, it indicates that the combustion state of the industrial coal powder boiler is dangerous, and the speed of the coal feeder of the industrial coal powder boiler needs to be reduced, and the load is automatically reduced, if the boiler combustion safety monitoring index of a certain industrial coal powder boiler is less than or equal to the maximum value of the preset range of the boiler combustion safety monitoring index grading response and greater than the minimum value of the preset range of the boiler combustion safety monitoring index grading response, it indicates that the combustion state of the industrial coal powder boiler is dangerous, and the air-fuel ratio of the industrial coal powder boiler needs to be adjusted to suppress the combustion non-uniformity, if the boiler combustion safety monitoring index of a certain industrial coal powder boiler is less than or equal to the minimum value of the preset range of the boiler combustion safety monitoring index grading response, it indicates that the combustion state of the industrial coal powder boiler is safe.

[0096] The present application provides another specific embodiment, which is as follows:

[0097] S01: The temperature at the top of the furnace of each industrial pulverized coal boiler of a certain enterprise is 1150℃, the temperature at the bottom of the furnace is 950℃, the pulverized coal grinding particle size (R90) is 18%, the preset pulverized coal grinding particle size is 12%, and the allowable deviation of the pulverized coal grinding particle size from the preset pulverized coal grinding particle size is 3%. The pulverized coal combustion uniformity index is calculated as follows:

[0098] ;

[0099] S02: A certain enterprise has a total of 5 industrial pulverized coal boilers, and the flame brightness of each industrial pulverized coal boiler is 0.85, 0.78, 0.92, 0.81, and 0.88. The average flame brightness is calculated as follows:

[0100] = (0.85 + 0.78 + 0.92 + 0.81 + 0.88) / 5 = 0.848,

[0101] The standard deviation of the flame brightness is calculated as follows:

[0102] ;

[0103] S03: The boiler combustion safety monitoring index is calculated as follows:

[0104] ;

[0105] The step S05: Industrial pulverized coal boiler combustion reliability analysis: is used to calculate the boiler combustion reliability control coefficient of each industrial pulverized coal boiler according to the boiler combustion efficiency deviation index and the boiler combustion safety monitoring index of each industrial pulverized coal boiler.

[0106] In one possible design, the calculation formula of the boiler combustion reliability control coefficient is as follows:

[0107] ;

[0108] wherein, represents the boiler combustion reliability control coefficient of the i-th industrial pulverized coal boiler, represents the boiler combustion efficiency deviation index of the i-th industrial pulverized coal boiler, represents the preset boiler combustion efficiency deviation index, represents the boiler combustion safety monitoring index of the i-th industrial pulverized coal boiler, represents the minimum value of the boiler combustion safety monitoring index, represents the maximum value of the boiler combustion safety monitoring index.

[0109] The step S06: industrial coal powder boiler combustion reliability evaluation: used for obtaining the boiler combustion reliability control coefficient of each industrial coal powder boiler, arranging according to the value of the boiler combustion reliability control coefficient, and evaluating the boiler combustion performance.

[0110] In a possible design, the step S06: industrial coal powder boiler combustion reliability evaluation specifically includes:

[0111] The boiler combustion reliability control coefficient of each industrial coal powder boiler is obtained, the target enterprise's boiler is arranged according to the sequence of the boiler combustion reliability control coefficient value from large to small, the target enterprise's industrial coal powder boiler is rearranged according to the arranged sequence, the boiler with the larger boiler combustion reliability control coefficient value is subjected to combustion safety early warning, and the boiler with the larger boiler combustion reliability control coefficient value is given the minimum priority of the boiler combustion.

[0112] In this embodiment, it needs to be specifically explained that, the present application calculates the exhaust smoke heat loss, the unburned carbon loss and the heat loss of each industrial coal powder boiler, calculates the boiler combustion efficiency, further calculates the boiler combustion efficiency deviation index of each industrial coal powder boiler, evaluates the boiler combustion efficiency stability index of each industrial coal powder boiler, compares with the preset boiler combustion efficiency stability index, if the boiler combustion efficiency stability index of a certain industrial coal powder boiler is greater than the preset boiler combustion efficiency stability index, it indicates that the fluctuation degree of the combustion efficiency of the industrial coal powder boiler is larger, the management personnel should be notified to carry out abnormal maintenance of the boiler, otherwise, it indicates that the fluctuation degree of the combustion efficiency of the industrial coal powder boiler is smaller, the combustion efficiency is stable, by accurately quantifying the combustion efficiency of the boiler, the fluctuation of the combustion efficiency of the target enterprise's boiler can be dynamically monitored, which is beneficial to timely find the abnormal fluctuation in the combustion process, and improves the intelligent control of the boiler combustion efficiency monitoring;

[0113] The present application collects the boiler combustion operation data through the boiler combustion operation data collection sub-step, calculates the boiler combustion safety monitoring index of each industrial pulverized coal boiler, compares with the classified response preset range of the boiler combustion safety monitoring index, if the boiler combustion safety monitoring index of a certain industrial pulverized coal boiler is greater than the maximum value of the classified response preset range of the boiler combustion safety monitoring index, it indicates that the combustion state of the industrial pulverized coal boiler is dangerous, and the speed of the coal feeder of the industrial pulverized coal boiler needs to be reduced, and the load is automatically reduced, if the boiler combustion safety monitoring index of a certain industrial pulverized coal boiler is less than or equal to the maximum value of the classified response preset range of the boiler combustion safety monitoring index, and greater than the minimum value of the classified response preset range of the boiler combustion safety monitoring index, it indicates that the combustion state of the industrial pulverized coal boiler is dangerous, and the air-coal ratio of the industrial pulverized coal boiler needs to be adjusted to suppress the combustion unevenness, if the boiler combustion safety monitoring index of a certain industrial pulverized coal boiler is less than or equal to the minimum value of the classified response preset range of the boiler combustion safety monitoring index, it indicates that the combustion state of the industrial pulverized coal boiler is safe, and the classified response measures are taken, which is beneficial to ensure that the different risk levels of the boiler combustion state are processed correspondingly, improve the safety and stability of the boiler combustion control, and is beneficial to improve the uniformity of the boiler combustion, the boiler combustion reliability control coefficient of each industrial pulverized coal boiler is calculated through the boiler combustion efficiency deviation index and the boiler combustion safety monitoring index of each industrial pulverized coal boiler, the boiler of the target enterprise is generated in the order of the boiler combustion reliability control coefficient value from large to small to generate a priority sequence, the industrial pulverized coal boilers of the target enterprise are rearranged according to the sequence, the boilers with greater boiler combustion reliability control coefficient values are subjected to combustion safety early warning, and the boilers with greater boiler combustion reliability control coefficient values are given the minimum priority of the boiler combustion, through the minimum priority of the boilers with greater boiler combustion reliability control coefficient values, the safety risk of the boiler operation can be effectively reduced, and the maximum priority of the boiler combustion can be ensured to be in the best combustion state, and the timeliness and combustion efficiency of the boiler treatment are improved.

[0114] Finally: the above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for intelligent control of boiler combustion in industrial pulverized coal boilers, characterized in that, include: Step S01: Industrial pulverized coal boiler numbering: used to obtain the number of industrial pulverized coal boilers of the target enterprise, and sequentially number each industrial pulverized coal boiler of the target enterprise as 1, 2, ... i, ... n; Step S02: Industrial pulverized coal boiler combustion data acquisition: This step is used to collect combustion data from each industrial pulverized coal boiler of the target enterprise. Step S02: Industrial pulverized coal boiler combustion data acquisition includes a boiler combustion efficiency data acquisition sub-step and a boiler combustion operation data acquisition sub-step. Step S03: Industrial pulverized coal boiler combustion optimization control: This step is used to calculate the boiler combustion efficiency deviation index of each industrial pulverized coal boiler based on the boiler combustion efficiency data collected in the boiler combustion efficiency data acquisition sub-step, and to respond to abnormal boiler combustion efficiency. Step S04: Industrial pulverized coal boiler combustion safety monitoring: This step is used to calculate the boiler combustion safety monitoring index for each industrial pulverized coal boiler based on the boiler combustion operation data collected in the boiler combustion operation data acquisition sub-step, and to control the safety of the boiler combustion status. Step S05: Industrial pulverized coal boiler combustion reliability analysis: This step is used to calculate the boiler combustion reliability control coefficient of each industrial pulverized coal boiler based on the boiler combustion efficiency deviation index and boiler combustion safety monitoring index. Step S06: Industrial pulverized coal boiler combustion reliability assessment: This step is used to obtain the boiler combustion reliability control coefficient for each industrial pulverized coal boiler, arrange them according to the value of the boiler combustion reliability control coefficient, and assess the boiler combustion performance. In step S02, the combustion data acquisition for industrial pulverized coal boilers specifically involves: Boiler combustion efficiency data acquisition sub-step: Collect the boiler combustion efficiency and combustion time of each industrial pulverized coal boiler in the target enterprise, and label them as follows. , , where i = 1, 2, ... n, i represents the number of the i-th industrial pulverized coal boiler; Boiler combustion operation data acquisition sub-step: Collect the furnace top temperature and furnace bottom temperature of each industrial pulverized coal boiler in the target enterprise using thermocouples, and mark them as follows. , The particle size of pulverized coal from various industrial pulverized coal boilers of the target enterprise was collected using a laser particle size analyzer and marked as follows: The flame brightness of each industrial pulverized coal boiler in the target company was collected using an industrial endoscope and a high-speed camera, and marked as... ; In step S04, the specific steps for monitoring the combustion safety of industrial pulverized coal boilers are as follows: S41: Calculate the pulverized coal combustion uniformity index for each industrial pulverized coal boiler using the furnace top temperature, furnace bottom temperature, and pulverized coal grinding particle size. ； in, Let represent the uniformity index of pulverized coal combustion in the i-th industrial pulverized coal boiler. Let represent the furnace top temperature of the i-th industrial pulverized coal boiler. Let represent the furnace bottom temperature of the i-th industrial pulverized coal boiler. Let represent the pulverized coal grinding particle size of the i-th industrial pulverized coal boiler. This represents the preset coal powder grinding particle size. This represents the allowable deviation between the coal powder grinding particle size and the preset coal powder grinding particle size; S42: Extract the flame brightness of each industrial pulverized coal boiler of the target enterprise, calculate the mean and standard deviation of the flame brightness of each industrial pulverized coal boiler, and mark them as... , ; S43: The formula for calculating the boiler combustion safety monitoring index is as follows: ； in, Let represent the boiler combustion safety monitoring index for the i-th industrial pulverized coal boiler. This is expressed as the average flame brightness. The value is expressed as the standard deviation of flame brightness, and e represents the natural constant. It is represented as the uniformity index of pulverized coal combustion in the i-th industrial pulverized coal boiler. S44: Obtain the boiler combustion safety monitoring index of each industrial pulverized coal boiler and compare it with the preset range of the boiler combustion safety monitoring index graded response. If the boiler combustion safety monitoring index of a certain industrial pulverized coal boiler is greater than the maximum value of the preset range of the boiler combustion safety monitoring index graded response, it indicates that the combustion state of the industrial pulverized coal boiler is dangerous and it is necessary to reduce the coal feeder speed and automatically reduce the load of the industrial pulverized coal boiler. If the boiler combustion safety monitoring index of a certain industrial pulverized coal boiler is less than or equal to the maximum value of the preset range of the boiler combustion safety monitoring index graded response, but greater than the minimum value of the preset range of the boiler combustion safety monitoring index graded response, it indicates that the combustion state of the industrial pulverized coal boiler has safety hazards and it is necessary to adjust the air-coal ratio of the industrial pulverized coal boiler to suppress combustion unevenness. If the boiler combustion safety monitoring index of a certain industrial pulverized coal boiler is less than or equal to the minimum value of the preset range of the boiler combustion safety monitoring index graded response, it indicates that the combustion state of the industrial pulverized coal boiler is safe. The formula for calculating the boiler combustion reliability control coefficient is as follows: ； in, Let be the boiler combustion reliability control coefficient for the i-th industrial pulverized coal boiler. Let be the boiler combustion efficiency deviation index for the i-th industrial pulverized coal boiler. This is represented by the preset boiler combustion efficiency deviation index. Let represent the boiler combustion safety monitoring index for the i-th industrial pulverized coal boiler. This represents the minimum value of the boiler combustion safety monitoring index. This represents the maximum value of the boiler combustion safety monitoring index.

2. The intelligent combustion control method for industrial pulverized coal boilers according to claim 1, characterized in that: The formula for calculating the boiler combustion efficiency deviation index is as follows: ； in, Let be the boiler combustion efficiency deviation index for the i-th industrial pulverized coal boiler. Let be the boiler combustion efficiency of the i-th industrial pulverized coal boiler. This is represented as the preset boiler combustion efficiency. This represents the combustion time of the i-th industrial pulverized coal boiler; The specific response to the abnormal boiler combustion efficiency is as follows: The boiler combustion efficiency stability index of various industrial pulverized coal boilers is evaluated using the boiler combustion efficiency deviation index. ； in, Let be the boiler combustion efficiency deviation index for the i-th industrial pulverized coal boiler. This is expressed as an influencing factor of the boiler combustion efficiency deviation index. This represents the boiler combustion efficiency deviation index of the (i-1)th industrial pulverized coal boiler. Obtain the boiler combustion efficiency stability index of each industrial pulverized coal boiler and compare it with the preset boiler combustion efficiency stability index. If the boiler combustion efficiency stability index of a certain industrial pulverized coal boiler is greater than the preset boiler combustion efficiency stability index, it indicates that the combustion efficiency of the industrial pulverized coal boiler fluctuates greatly, and the management personnel should be notified to carry out abnormal boiler maintenance. Conversely, it indicates that the combustion efficiency of the industrial pulverized coal boiler fluctuates less and the combustion efficiency is stable.

3. The intelligent combustion control method for industrial pulverized coal boilers according to claim 2, characterized in that: The boiler combustion efficiency is specifically: S31: Calculate the heat loss from flue gas exhaust: ； in, Let represent the flue gas heat loss of the i-th industrial pulverized coal boiler. Let represent the flue gas volume of the i-th industrial pulverized coal boiler. Let be the average specific heat capacity of the flue gas from the i-th industrial pulverized coal boiler. Let represent the exhaust gas temperature of the i-th industrial pulverized coal boiler. The ambient temperature is represented by qh, which represents the lower heating value of coal and has a value of 23000. S32: Calculate unburned carbon loss: ； in, Let represent the unburned carbon loss of the i-th industrial pulverized coal boiler. Let represent the fuel ash content of the i-th industrial pulverized coal boiler. Let represent the carbon content of the fly ash from the i-th industrial pulverized coal boiler. Let represent the carbon content of the slag of the i-th industrial pulverized coal boiler, and ru represent the calorific value of carbon, which is 337. S33: Calculate heat loss: ； in, Let represent the heat loss of the i-th industrial pulverized coal boiler. Let represent the boiler evaporation capacity of the i-th industrial pulverized coal boiler. This is expressed as the boiler's rated evaporation capacity; S34: Calculate boiler combustion efficiency: ； in, Let be the boiler combustion efficiency of the i-th industrial pulverized coal boiler. Let represent the flue gas heat loss of the i-th industrial pulverized coal boiler. Let represent the unburned carbon loss of the i-th industrial pulverized coal boiler. This represents the heat loss of the i-th industrial pulverized coal boiler.

4. The intelligent combustion control method for industrial pulverized coal boilers according to claim 1, characterized in that: In step S06, the combustion reliability assessment of industrial pulverized coal boilers specifically includes: Obtain the boiler combustion reliability control coefficient of each industrial pulverized coal boiler, generate a priority sequence of boilers of the target enterprise according to the boiler combustion reliability control coefficient values ​​from large to small, rearrange the industrial pulverized coal boilers of the target enterprise according to the rearranged order, issue combustion safety warnings for boilers with larger boiler combustion reliability control coefficient values, and assign the lowest boiler combustion priority to boilers with larger boiler combustion reliability control coefficient values.

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