A boiler combustion control method, system, storage medium and intelligent terminal for thermal power plants

Abstract

The present application relates to a method, system, storage medium and intelligent terminal for controlling the combustion of a boiler in a thermal power plant, and relates to the field of thermal power generation technology. It includes obtaining fuel weight information; calculating and obtaining fuel volume information according to the fuel weight information and the density value; calculating and obtaining the boiler air volume information according to the boiler volume and the fuel volume information; calculating and obtaining the boiler oxygen volume information according to the boiler air volume information and the oxygen proportion value; matching the weight information and oxygen information stored in the fuel oxygen database with the fuel weight information to determine the reactive oxygen volume information; judging whether the boiler oxygen volume information is less than the reactive oxygen volume information; if not less, outputting a normal combustion signal; if less, calculating the difference to obtain the difference volume information, and controlling the oxygen supply port preset to blow out the oxygen corresponding to the volume value of the difference volume information. The present application has the effect of improving the combustion efficiency of fuel.

Description

Technical Field

[0001] The present application relates to the field of thermal power generation technology, and in particular, to a boiler combustion control method, system, storage medium and intelligent terminal for a thermal power plant. Background Art

[0002] A thermal power plant, abbreviated as a coal-fired power plant, is a factory that uses combustibles (such as coal) as fuel to produce electric energy. The basic production process is as follows: when the fuel burns, it heats water to generate steam, converting the chemical energy of the fuel into heat energy. The steam pressure drives the steam turbine to rotate, converting heat energy into mechanical energy. Then the steam turbine drives the generator to rotate, converting mechanical energy into electric energy.

[0003] In the related art, during the process of thermal power generation, the fuel is placed in the boiler, and the oxygen inside the boiler reacts with the fuel to achieve combustion of the fuel in the boiler, thereby releasing heat.

[0004] In view of the above related art, the inventor believes that since the amount of fuel burned each time is different, the amount of carbon is different, and the amount of oxygen is limited due to the fixed size of the internal space of the boiler. When the amount of fuel to be burned is large, there may be a situation where the amount of oxygen required for fuel combustion is insufficient, which may result in a low fuel combustion efficiency, and there is still room for improvement. Summary of the Invention

[0005] In order to improve the efficiency of fuel combustion, the present application provides a boiler combustion control method, system, storage medium and intelligent terminal for a thermal power plant.

[0006] In a first aspect, the present application provides a boiler combustion control method for a thermal power plant, adopting the following technical solution:

[0007] A boiler combustion control method for a thermal power plant includes:

[0008] Obtaining fuel weight information;

[0009] Calculating and obtaining fuel volume information according to the weight corresponding to the fuel weight information and a preset density value;

[0010] Calculating and obtaining boiler air volume information according to the preset boiler volume and the volume value corresponding to the fuel volume information;

[0011] Calculating and obtaining boiler oxygen volume information according to the boiler air volume information and a preset oxygen ratio value;

[0012] Matching the weight information and oxygen information stored in the preset fuel oxygen database with the fuel weight information to determine the reaction oxygen volume information;

[0013] Determine whether the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reaction oxygen volume information;

[0014] If the volume value corresponding to the boiler oxygen volume information is not less than the volume value corresponding to the reaction oxygen volume information, output a normal combustion signal;

[0015] If the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reaction oxygen volume information, calculate the difference to obtain the difference volume information, and control the oxygen supply port to blow out oxygen with a volume value corresponding to the difference volume information. The difference is the difference between the volume value corresponding to the reaction oxygen volume information and the volume value corresponding to the boiler oxygen volume information.

[0016] By adopting the above technical solution, first obtain the fuel weight information required for combustion to calculate the volume occupied by the fuel, so as to determine the amount of oxygen in the boiler. According to the weight of the heat, the amount of oxygen required for complete combustion can be calculated. By comparing the amount of oxygen in the boiler at this time with the required amount of oxygen, it can be known whether the oxygen in the boiler is sufficient. If the oxygen is insufficient, the oxygen supply port can be used to supply oxygen to the inside of the boiler to enable the fuel to burn normally, thereby improving the efficiency of fuel combustion.

[0017] Optionally, it further includes an oxygen supply method for the oxygen supply port. This method includes:

[0018] Obtain the oxygen concentration information and the operation start signal;

[0019] Start timing when the operation start signal is obtained to output the operation duration information, and define the oxygen concentration information at this time as the initial oxygen concentration information;

[0020] Determine whether the duration corresponding to the operation duration information is consistent with the preset limited duration;

[0021] If the duration corresponding to the operation duration information is inconsistent with the limited duration, maintain the timing state of the operation duration information;

[0022] If the duration corresponding to the operation duration information is consistent with the limited duration, define the oxygen concentration information at this time as the termination oxygen concentration information;

[0023] Calculate and obtain the oxygen consumption rate information according to the termination oxygen concentration information, the initial oxygen concentration information, and the limited duration;

[0024] Control the oxygen supply port to supply oxygen at a speed value corresponding to the oxygen consumption rate information.

[0025] By adopting the above technical solution, the oxygen consumption rate during fuel reaction can be calculated within a limited time duration, so that the oxygen supply port can supply oxygen at the oxygen consumption rate to achieve the stability of oxygen in the boiler and reduce the situation of slow reaction rate due to untimely oxygen supply in the boiler.

[0026] Optionally, it further includes a method for obtaining an operation start signal, and this method includes:

[0027] When obtaining the fuel weight information, control the countdown of the preset maintenance duration;

[0028] Judge whether the weight value corresponding to the fuel weight information changes before the countdown of the maintenance duration reaches zero;

[0029] If the weight value corresponding to the fuel weight information changes before the countdown of the maintenance duration reaches zero, control the maintenance duration to start the countdown again;

[0030] If the weight value corresponding to the fuel weight information does not change before the countdown of the maintenance duration reaches zero, output and maintain a ready signal;

[0031] When the ready signal exists, obtain a key pressing signal;

[0032] According to the key pressing signal, obtain the pressing times information by counting;

[0033] Judge whether the number value corresponding to the pressing times information is consistent with the preset pressing value;

[0034] If the number value corresponding to the pressing times information is not consistent with the pressing value, control the boiler to maintain the current state;

[0035] If the number value corresponding to the pressing times information is consistent with the pressing value, output an operation start signal.

[0036] By adopting the above technical solution, when starting the boiler combustion, first observe whether the weight of the fuel changes within the maintenance duration to determine that this is not the process of adding fuel, reducing the occurrence of the situation where the boiler starts during the fuel adding process by the staff; when the boiler needs to be started, the staff needs to perform key pressing operations multiple times to reduce the occurrence of the situation where the boiler starts due to the staff accidentally pressing the key.

[0037] Optionally, the method for obtaining the operation start signal further includes:

[0038] When obtaining the key pressing signal, control the countdown of the preset pressing duration;

[0039] Judge whether a key pressing signal is obtained again before the countdown of the pressing duration reaches zero;

[0040] If a key pressing signal is obtained again before the countdown of the extrusion duration reaches zero, the value corresponding to the number of extrusions in the extrusion count information is incremented by one;

[0041] If a key pressing signal is not obtained again before the countdown of the extrusion duration reaches zero, the value corresponding to the number of extrusions in the extrusion count information is reset to zero.

[0042] By adopting the above technical solution, when the staff presses the key, the time interval between the presses is used to determine whether the presses are in the same operation process, so as to reduce the occurrence of the boiler starting due to multiple accidental presses during non-operation time.

[0043] Optionally, it further includes a method for determining a limited duration, and this method includes:

[0044] Match the oxygen volume information, duration value stored in the preset duration database with the boiler oxygen volume information to determine the limited duration;

[0045] Obtain the oxygen concentration change information at preset detection time intervals within the limited duration;

[0046] Calculate the difference between the change values corresponding to the oxygen concentration change information in adjacent detection time intervals to obtain the fluctuation value;

[0047] Judge whether the fluctuation value is greater than the preset allowable value;

[0048] If the fluctuation value is not greater than the allowable value, maintain the current state;

[0049] If the fluctuation value is greater than the allowable value, update the duration corresponding to the current operation duration information to the new limited duration.

[0050] By adopting the above technical solution, the limited duration is determined according to the initial amount of oxygen in the boiler, reducing the occurrence of insufficient oxygen combustion in the boiler within the limited duration; at the same time, the change of oxygen concentration is detected at preset detection time intervals within the limited duration. If there is a large change difference in adjacent detection time intervals, it may be that the oxygen in the boiler has not moved to the fuel to react with the fuel. At this time, in order to reduce the inaccuracy of subsequent oxygen concentration judgment, the current operation duration information is updated to the limited duration to ensure that the oxygen consumption rate can be detected more accurately.

[0051] Optionally, the oxygen supply method of the oxygen supply port further includes:

[0052] Divide the inside of the boiler vertically into a preset number of detection areas, and each detection area is provided with an oxygen supply pipe connected to the oxygen supply port;

[0053] Obtain the regional oxygen information in each detection area;

[0054] Determine the concentration ratio information between the detection areas based on the regional oxygen information;

[0055] Control the regulating opening size of the oxygen supply pipe to adjust the ratio corresponding to the concentration ratio information to a preset reference ratio.

[0056] By adopting the above technical solution, during the fuel combustion process, when the oxygen concentration ratio in each detection area is the reference ratio, the fuel combustion efficiency can be relatively high. At this time, control the opening size of each oxygen supply port so that the comparison of the oxygen concentrations in each detection area in the boiler during the oxygen supply process can approach the reference ratio.

[0057] Optionally, it further includes:

[0058] Determine the fuel consumption speed information based on the speed value corresponding to the oxygen consumption speed information;

[0059] Calculate and obtain the combustion duration information of the fuel combustion based on the fuel weight information and the fuel consumption speed information;

[0060] Judge whether the duration corresponding to the operation duration information is greater than the duration corresponding to the combustion duration information;

[0061] If the duration corresponding to the operation duration information is not greater than the duration corresponding to the combustion duration information, output a signal indicating that the operation is in progress;

[0062] If the duration corresponding to the operation duration information is greater than the duration corresponding to the combustion duration information, output a signal indicating that the operation is completed.

[0063] By adopting the above technical solution, the fuel consumption speed can be determined according to the oxygen consumption speed, so that the approximate time required for the fuel to burn completely during the fuel combustion process can be determined, so that a signal indicating that the operation is completed can be output when the fuel combustion is approximately completed to prompt the staff, enabling the staff to timely know the completion situation of the fuel combustion.

[0064] In a second aspect, the present application provides a combustion control system for a thermal power plant boiler, adopting the following technical solution:

[0065] A combustion control system for a thermal power plant boiler, including:

[0066] An acquisition module, used to acquire fuel weight information;

[0067] A processing module, connected to the acquisition module and the judgment module, used for information storage and processing;

[0068] The processing module calculates and obtains the fuel volume information based on the weight corresponding to the fuel weight information and a preset density value;

[0069] The processing module calculates and obtains the boiler air volume information based on the volume values corresponding to the preset boiler volume and fuel volume information;

[0070] The processing module calculates and obtains the boiler oxygen volume information based on the boiler air volume information and the preset oxygen ratio value;

[0071] The processing module matches the weight information and oxygen information stored in the preset fuel oxygen database with the fuel weight information to determine the reaction oxygen volume information;

[0072] A judgment module is used to judge whether the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reaction oxygen volume information;

[0073] If the judgment module judges that the volume value corresponding to the boiler oxygen volume information is not less than the volume value corresponding to the reaction oxygen volume information, the processing module outputs a normal combustion signal;

[0074] If the judgment module judges that the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reaction oxygen volume information, the processing module calculates the difference to obtain the difference volume information, and controls the preset oxygen supply port to blow out the oxygen corresponding to the volume value of the difference volume information, where the difference is the difference between the volume value corresponding to the reaction oxygen volume information and the volume value corresponding to the boiler oxygen volume information.

[0075] By adopting the above technical solution, first, the acquisition module acquires the fuel weight information required for combustion, so that the processing module calculates the volume occupied by the fuel, thereby enabling the processing module to determine the amount of oxygen in the boiler. According to the weight of the heat, the amount of oxygen required for complete combustion can be calculated. By comparing the amount of oxygen in the boiler at this time with the required amount of oxygen by the judgment module, the processing module can know whether the oxygen in the boiler is sufficient. If the judgment module judges that the oxygen is insufficient, the processing module can supply oxygen to the inside of the boiler by using the oxygen supply port to enable the fuel to burn normally, thereby improving the efficiency of fuel combustion.

[0076] In a third aspect, the present application provides an intelligent terminal, adopting the following technical solution:

[0077] An intelligent terminal includes a memory and a processor, and a computer program capable of being loaded and executed by the processor for any one of the above-mentioned thermal power plant boiler combustion control methods is stored on the memory.

[0078] By adopting the above technical solution, through the use of an intelligent terminal, first obtain the weight information of the fuel to be burned, calculate the volume occupied by the fuel, and thus determine the amount of oxygen in the boiler. According to the weight of the heat, the amount of oxygen required for complete combustion can be calculated. By comparing the amount of oxygen in the boiler at this time with the required amount of oxygen, it can be known whether the oxygen in the boiler is sufficient. If the oxygen is insufficient, the oxygen supply port can be used to supply oxygen to the inside of the boiler to enable the fuel to burn normally, thereby improving the combustion efficiency of the fuel.

[0079] In a fourth aspect, the present application provides a computer storage medium that can store corresponding programs and has the characteristic of improving the combustion efficiency during the fuel combustion process. The following technical solution is adopted:

[0080] A computer-readable storage medium stores a computer program that can be loaded and executed by a processor to perform any one of the above-mentioned thermal power plant boiler combustion control methods.

[0081] By adopting the above technical solution, there is a computer program for the thermal power plant boiler combustion control method in the storage medium. First, obtain the weight information of the fuel to be burned to calculate the volume occupied by the fuel, and thus determine the amount of oxygen in the boiler. According to the weight of the heat, the amount of oxygen required for complete combustion can be calculated. By comparing the amount of oxygen in the boiler at this time with the required amount of oxygen, it can be known whether the oxygen in the boiler is sufficient. If the oxygen is insufficient, the oxygen supply port can be used to supply oxygen to the inside of the boiler to enable the fuel to burn normally, thereby improving the combustion efficiency of the fuel.

[0082] In summary, the present application includes at least one of the following beneficial technical effects:

[0083] 1. By calculating the amount of fuel to be burned to determine the required oxygen, and then supplying sufficient oxygen through the oxygen supply port, the situation of low combustion efficiency due to insufficient oxygen during the fuel process is reduced.

[0084] 2. During the oxygen supply process, the oxygen is supplied at the oxygen loss rate to enable the fuel to burn normally.

[0085] 3. When starting the boiler, it is necessary to first determine that it is not the feeding stage and the staff needs to continuously press the button multiple times to reduce the occurrence of accidental boiler startup and improve the safety of boiler use. BRIEF DESCRIPTION OF THE DRAWINGS

[0086] Figure 1 is a flowchart of the thermal power plant boiler combustion control method.

[0087] Figure 2 is a flowchart of the oxygen supply speed determination method.

[0088] Figure 3It is a flowchart of the boiler startup determination method.

[0089] Figure 4 It is a flowchart of the extrusion situation determination method.

[0090] Figure 5 It is a flowchart of the limited duration determination method.

[0091] Figure 6 It is a flowchart of the oxygen distribution situation determination method.

[0092] Figure 7 It is a flowchart of the combustion state determination method.

[0093] Figure 8 It is a module flowchart of the combustion control method for a thermal power plant boiler. Detailed implementation manners

[0094] In order to make the purpose, technical solutions and advantages of the present application clearer and more understandable, the following will further describe the present application in detail in conjunction with the attached Figure 1-8 and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0095] The following will further describe the embodiments of the present invention in detail in conjunction with the drawings of the specification.

[0096] The embodiment of the present application discloses a combustion control method for a thermal power plant boiler. When the boiler is needed to burn fuel, the situation of the boiler is realized by pressing the key multiple times. At this time, the amount of oxygen required is determined by the amount of fuel, so that external oxygen supply can be carried out when the oxygen in the boiler is insufficient, so that the fuel can burn better and the efficiency of fuel combustion can be improved.

[0097] Refer to Figure 1 , the method flow of the combustion control of the thermal power plant boiler includes the following steps:

[0098] Step S100: Obtain fuel weight information.

[0099] The weight value corresponding to the fuel weight information is the fuel value required to be burned, and this information can be obtained through a weight sensor, which is a conventional technical means for those skilled in the art and will not be elaborated.

[0100] Step S101: Calculate and obtain the fuel volume information according to the weight corresponding to the fuel weight information and the preset density value.

[0101] Determine the approximate density value of the fuel according to the fuel type. The density value is a fixed value, and the specific size of the density value is set by the staff according to the actual situation and will not be elaborated; the volume value corresponding to the fuel volume information is the space size occupied by the fuel, and the calculation formula is , where is the volume value corresponding to the fuel volume information, M is the weight value corresponding to the fuel weight information, is the density value corresponding to the fuel.

[0102] Step S102: Calculate the boiler air volume information based on the preset boiler volume and the volume value corresponding to the fuel volume information.

[0103] The volume value corresponding to the boiler air volume information is the volume value occupied by the air in the boiler. The calculation formula is , where is the boiler volume, that is, the space size of the combustion chamber for fuel combustion in the boiler, which is set during boiler production and will not be elaborated; is the volume value corresponding to the boiler air volume information.

[0104] Step S103: Calculate the boiler oxygen volume information based on the boiler air volume information and the preset oxygen ratio value.

[0105] The oxygen ratio value is a fixed value, which is the content value of oxygen in the air and can be defined as 20% or 21%. The specific value is set by the staff according to the actual situation and will not be elaborated; The volume value corresponding to the boiler oxygen volume information is the oxygen volume existing in the boiler. The calculation formula is , where is the volume value corresponding to the boiler oxygen volume information, is the oxygen ratio value.

[0106] Step S104: Match the weight information and oxygen information stored in the preset fuel-oxygen database with the fuel weight information to determine the reactive oxygen volume information.

[0107] The weight value corresponding to the weight information is the weight value of the fuel to be burned. The volume value corresponding to the oxygen information is the oxygen volume value required for combustion of the heat corresponding to the weight value of the weight information. Different fuel weights are used to determine the corresponding oxygen volume, thereby realizing the establishment of the fuel-oxygen database. The establishment process of the fuel-oxygen database is a conventional technical means for those skilled in the art and will not be elaborated; When the fuel weight information is input into the fuel-oxygen database, the fuel-oxygen database can output the relative oxygen information, and this oxygen information is the reactive oxygen volume information to determine the oxygen volume required for burning the current weight of fuel.

[0108] Step S105: Determine whether the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reactive oxygen volume information.

[0109] The purpose of the judgment is to know whether the oxygen in the current boiler meets the oxygen demand for fuel combustion, so as to judge whether to supply oxygen subsequently.

[0110] Step S1051: If the volume value corresponding to the boiler oxygen volume information is not less than the volume value corresponding to the reaction oxygen volume information, output a normal combustion signal.

[0111] When the volume value corresponding to the boiler oxygen volume information is not less than the volume value corresponding to the reaction oxygen volume information, it indicates that the oxygen in the boiler can meet the fuel combustion demand this time. Output a normal combustion signal to record this situation, so that the staff can know that the oxygen in the boiler is sufficient and there is no need for external oxygen supply.

[0112] Step S1052: If the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reaction oxygen volume information, calculate the difference to obtain the difference volume information, and control the oxygen supply port to blow out the oxygen with the volume value corresponding to the difference volume information. The difference is the difference between the volume value corresponding to the reaction oxygen volume information and the volume value corresponding to the boiler oxygen volume information.

[0113] When the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reaction oxygen volume information, it indicates that the oxygen in the boiler at this time cannot meet the fuel combustion demand. The volume value corresponding to the difference volume information is the oxygen volume value lacking for fuel combustion here. The calculation formula is , where is the volume value corresponding to the reaction oxygen volume information, is the volume value corresponding to the difference volume information; the oxygen supply port is a part for oxygen supply provided in the boiler and connected to the external oxygen supply device. When the external oxygen supply device operates, oxygen can be supplied to the inside of the boiler through the oxygen supply port. Control the oxygen supply port to blow out the oxygen with the volume value corresponding to the difference volume information to enable the fuel in the boiler to burn normally, thereby reducing the occurrence of low combustion efficiency caused by insufficient oxygen during fuel combustion.

[0114] Referring to Figure 2 , it also includes an oxygen supply method for the oxygen supply port. This method includes:

[0115] Step S200: Obtain oxygen concentration information and an operation start signal.

[0116] The operation start signal is a signal for controlling the boiler to start operating. The specific acquisition method will be described later and will not be elaborated here; the concentration value corresponding to the oxygen concentration information is the concentration value of the oxygen inside the boiler, which can be obtained through an oxygen concentration detector capable of detecting oxygen concentration under high-temperature conditions. This is a conventional technical means for those skilled in the art and will not be elaborated.

[0117] Step S201: Start timing when the job start signal is obtained to output job duration information, and define the oxygen concentration information at this time as the initial oxygen concentration information.

[0118] The duration value corresponding to the job duration information is the duration value when the job start signal is obtained, that is, the duration value of the boiler startup for combustion operation. Obtaining the job duration information through an instrument with a timing function is a conventional technical means for those skilled in the art and will not be elaborated here; defining the initial oxygen concentration information as the oxygen concentration information at the beginning for identification is convenient for subsequent calling of the oxygen concentration information at the start.

[0119] Step S202: Determine whether the duration corresponding to the job duration information is consistent with the preset limited duration.

[0120] The limited duration is a fixed value for a single job and is the duration set for detecting the fuel combustion speed. The specific duration will be further described later and will not be elaborated here; the purpose of the determination is to know whether the duration of the boiler operation has reached the preset value, so as to facilitate further analysis of the boiler combustion later.

[0121] Step S2021: If the duration corresponding to the job duration information is inconsistent with the limited duration, maintain the timing state of the job duration information.

[0122] When the duration corresponding to the job duration information is inconsistent with the limited duration, it means that the duration of fuel combustion in the boiler has not reached the preset time at this time. Maintain the boiler combustion state without any action, and make the job duration information remain in the continuous timing state.

[0123] Step S2022: If the duration corresponding to the job duration information is consistent with the limited duration, define the oxygen concentration information at this time as the termination oxygen concentration information.

[0124] When the duration corresponding to the job duration information is consistent with the limited duration, it means that the duration of fuel combustion in the boiler has reached the preset time at this time. Further analysis of the subsequent oxygen usage situation can be carried out. At this time, define the current oxygen concentration information as the termination oxygen concentration information for identification, which is convenient for subsequent calling and analysis of the termination oxygen concentration information.

[0125] Step S203: Calculate and obtain the oxygen consumption speed information based on the termination oxygen concentration information, the initial oxygen concentration information, and the limited duration.

[0126] The speed value corresponding to the oxygen consumption speed information is the combustion speed value of the fuel in the boiler during a limited time period. The calculation method is to calculate the corresponding oxygen amount based on the concentration value of the terminating oxygen concentration information and the concentration value of the initial oxygen concentration information, then calculate the oxygen consumption based on the difference between the two oxygen amounts, and finally divide the consumption by the limited time period to determine the oxygen consumption speed value.

[0127] Step S204: Control the oxygen supply port to supply oxygen at the speed value corresponding to the oxygen consumption speed information.

[0128] The oxygen supply port supplies oxygen at the speed value corresponding to the oxygen consumption speed information to keep the content of internal oxygen stable, so that the fuel can burn better. The method of controlling the oxygen supply port is a conventional technical means for those skilled in the art and will not be elaborated here.

[0129] Refer to Figure 3 , and it also includes a method for obtaining the operation start signal, which includes:

[0130] Step S300: Control the countdown of the preset maintenance duration when obtaining the fuel weight information.

[0131] When placing the fuel in the boiler, the current fuel weight information can be obtained. When the fuel weight information is obtained, it indicates that the fuel placement starts at this time. Control the countdown of the maintenance duration when obtaining the fuel weight information to facilitate the subsequent judgment of obtaining the operation start signal. Among them, the maintenance duration is a fixed value, which is set by the staff according to the actual situation and will not be elaborated here.

[0132] Step S301: Judge whether the weight value corresponding to the fuel weight information changes before the countdown of the maintenance duration reaches zero.

[0133] The purpose of the judgment is to know whether the fuel is placed again during the maintenance duration after the fuel placement is completed, so as to facilitate the subsequent judgment of whether all the fuel has been placed.

[0134] Step S3011: If the weight value corresponding to the fuel weight information changes before the countdown of the maintenance duration reaches zero, control the maintenance duration to start the countdown again.

[0135] When the weight value corresponding to the fuel weight information changes before the countdown of the maintenance duration reaches zero, it means that the fuel is placed again during the maintenance duration. Control the maintenance duration to start the countdown again to judge whether the fuel is placed during the next maintenance duration.

[0136] Step S3012: If the weight value corresponding to the fuel weight information does not change before the countdown of the maintenance duration reaches zero, output and maintain the ready signal.

[0137] When the weight value corresponding to the fuel weight information does not change before the countdown of the maintenance duration reaches zero, it indicates that no fuel has been placed during the maintenance duration. That is, it is highly probable that all fuel placement is completed. An ready signal is output to record this situation so that the staff can be informed of this.

[0138] Step S302: Obtain a key pressing signal when the ready signal exists.

[0139] The key pressing signal is output by the staff pressing the corresponding start key of the boiler, which is a conventional technical means for those skilled in the art and will not be elaborated here. The key pressing signal can only be obtained when the ready signal exists to reduce the occurrence of the situation where the staff accidentally presses the start key during fuel placement, causing the boiler to start.

[0140] Step S303: Count according to the key pressing signal to obtain the number of pressing times information.

[0141] The number value corresponding to the number of pressing times information is the total value of the key pressing signal. The number of pressing times information is obtained by counting. The initial value of the number value corresponding to the number of pressing times information is zero. When a key pressing signal is received, the number value corresponding to the number of pressing times information is incremented by one.

[0142] Step S304: Determine whether the number value corresponding to the number of pressing times information is consistent with a preset pressing value.

[0143] The pressing value is a fixed value, which is the number of times the start key needs to be pressed when the boiler is started as set by the staff. The specific value is set by the staff according to the actual situation and will not be elaborated here. The purpose of the determination is to know whether the current number of times the start key is pressed meets the requirements for starting the boiler, so as to determine whether the boiler needs to be started.

[0144] Step S3041: If the number value corresponding to the number of pressing times information is not consistent with the pressing value, control the boiler to maintain its current state.

[0145] When the number value corresponding to the number of pressing times information is not consistent with the pressing value, it indicates that the number of times the start key is pressed at this time does not meet the starting requirements of the boiler. It may be that the start key is accidentally pressed. Control the boiler to maintain its current state without taking any action to ensure the stability of the boiler.

[0146] Step S3042: If the number value corresponding to the number of pressing times information is consistent with the pressing value, output an operation start signal.

[0147] When the number value corresponding to the number of pressing times information is consistent with the pressing value, it indicates that the boiler can be started. At this time, an operation start signal is output so that the boiler can start normally for operation.

[0148] Reference Figure 4 , the method for obtaining the operation start signal further includes:

[0149] Step S400: When obtaining the key pressing signal, control the countdown of the preset pressing duration.

[0150] The pressing duration is a fixed value, which is the maximum value of the time interval between obtaining two adjacent key pressing signals set by the staff. When obtaining the key pressing signal, control the countdown of the pressing duration, so as to facilitate subsequent judgment on whether the time interval for receiving the key pressing signal again exceeds the pressing duration.

[0151] Step S401: Judge whether a key pressing signal is obtained again before the countdown of the pressing duration reaches zero.

[0152] The purpose of the judgment is to know whether a key pressing signal is obtained again within the pressing duration, so as to judge whether the key pressing is continuous pressing.

[0153] Step S4011: If a key pressing signal is obtained again before the countdown of the pressing duration reaches zero, add 1 to the value corresponding to the pressing times information.

[0154] When a key pressing signal is obtained again before the countdown of the pressing duration reaches zero, it indicates that the staff presses the start key again within the specified time, that is, continuously presses the start key. At this time, add 1 to the value corresponding to the pressing times information to record the pressing times information.

[0155] Step S4012: If a key pressing signal is not obtained again before the countdown of the pressing duration reaches zero, reset the value corresponding to the pressing times information to zero.

[0156] When a key pressing signal is not obtained again before the countdown of the pressing duration reaches zero, it indicates that the start key is not continuously pressed. At this time, the start key may be accidentally pressed. Reset the value corresponding to the pressing times information to zero, so that the pressing times information can count the effective pressing situation during boiler startup.

[0157] Reference Figure 5 , it further includes a method for determining the limited duration, and this method includes:

[0158] Step S500: Match the oxygen volume information, duration value stored in the preset duration database with the boiler oxygen volume information to determine the limited duration.

[0159] The volume value corresponding to the oxygen volume information is the original oxygen volume value in the boiler, and the duration value is the duration value required for combustion to detect the oxygen consumption rate under the current oxygen volume information. Different duration values are determined according to different oxygen volume information to reduce the occurrence of inaccurate detection results caused by insufficient oxygen during the oxygen consumption detection. The duration database is established with different oxygen volume information and the corresponding duration values. The establishment method is a conventional technical means for those skilled in the art and will not be elaborated here. The boiler oxygen volume information is input into the duration database, and the duration database can output the corresponding limited duration for the detection of the oxygen consumption rate.

[0160] Step S501: Obtain the oxygen concentration change information at preset detection time intervals within the limited duration.

[0161] The duration value corresponding to the detection time interval is a fixed value, which is set by the staff according to the actual situation and will not be elaborated here. The oxygen concentration change situation within the detection time interval can be obtained by detecting the oxygen concentration information at the start and end of the detection time interval within the limited duration, and the information recording the oxygen concentration change value is the oxygen concentration change information.

[0162] Step S502: Calculate the difference between the change values corresponding to the oxygen concentration change information in adjacent detection time intervals to obtain the fluctuation value.

[0163] Adjacent detection time intervals are the detection time intervals adjacent on the time axis. The fluctuation value is the difference between the change values corresponding to the oxygen concentration change information in adjacent detection time intervals. The calculation formula is , where is the fluctuation value, is the change value corresponding to the oxygen concentration change information in the detection time interval with an earlier time in adjacent detection time intervals, is the change value corresponding to the oxygen concentration change information in the detection time interval with a later time in adjacent detection time intervals.

[0164] Step S503: Determine whether the fluctuation value is greater than the preset allowable value.

[0165] The allowable value is the maximum allowable value of the fluctuation value during fuel combustion. The purpose of the determination is to know whether the fuel combustion is in a normal state.

[0166] Step S5031: If the fluctuation value is not greater than the allowable value, maintain the current state.

[0167] When the fluctuation value is not greater than the allowable value, it indicates that the fuel is in a normal combustion state, and maintaining the current state enables the fuel to continue burning.

[0168] Step S5032: If the fluctuation value is greater than the allowable value, update the duration corresponding to the current operation duration information to a new limited duration.

[0169] When the fluctuation value is greater than the allowable value, it indicates that the fuel is not in a normal combustion state. It is possible that there is oxygen in the boiler but the oxygen has not moved to the combustion location, resulting in unstable fuel combustion. At this time, update the duration corresponding to the current operation duration information to a new limited duration to reduce the occurrence of inaccurate detection of the oxygen consumption rate caused by unstable fuel combustion in the future.

[0170] Refer to Figure 6 , the oxygen supply method of the oxygen supply port further includes:

[0171] Step S600: Divide the inside of the boiler vertically into a preset number of detection areas, and each detection area is preset with an oxygen supply pipe connected to the oxygen supply port.

[0172] The number of detections is a fixed value, which is divided by the staff according to the oxygen distribution in each area in the vertical direction during fuel combustion. The specific number is set by the staff according to the actual situation and will not be elaborated; dividing into several detection areas is convenient for identifying each area inside the boiler. One end of the oxygen supply pipe opens towards each detection area and the openings of all oxygen supply pipes are arranged parallel to the ground. The other ends of the oxygen supply pipes are all connected to the oxygen supply port to enable the oxygen blown out by the oxygen supply port to move into the detection area through the oxygen supply pipe. At the same time, the oxygen supply pipe has the function of adjusting the opening size to change the oxygen supply amount in each detection area through the opening size. The opening adjustment function is a conventional technical means for those skilled in the art and will not be elaborated.

[0173] Step S601: Obtain the regional oxygen information in each detection area.

[0174] The value corresponding to the regional oxygen information is the oxygen content value in each detection area, which is obtained through an oxygen concentration detector and is a conventional technical means for those skilled in the art and will not be elaborated.

[0175] Step S602: Determine the concentration ratio information between the detection areas according to the regional oxygen information.

[0176] The ratio corresponding to the concentration ratio information is the ratio between the oxygen concentrations in each detection area. For example, if there are three detection areas from top to bottom in the vertical direction, and the oxygen concentrations in each detection area are 10, 15, and 20 in sequence, then the ratio corresponding to the concentration ratio information is 2:3:4.

[0177] Step S603: Control the oxygen supply pipe to adjust the opening size so that the ratio corresponding to the concentration ratio information is adjusted to the preset reference ratio.

[0178] The reference ratio is the ratio obtained by the staff through experiments that can effectively improve the fuel combustion efficiency. At this time, the opening sizes of the oxygen supply pipes in each detection area are controlled so that the amount of oxygen supplied to each detection area per unit time is different, thereby enabling the ratio corresponding to the concentration ratio information to be adjusted to the reference ratio, so as to further improve the fuel combustion efficiency.

[0179] Refer to Figure 7 , and further includes:

[0180] Step S700: Determine the fuel consumption speed information according to the speed value corresponding to the oxygen consumption speed information.

[0181] Since there is a corresponding chemical relationship between the fuel combustion amount and the oxygen consumption amount, at this time, the speed value consumed during fuel combustion can be determined according to the speed value corresponding to the oxygen consumption speed information, and the information of this speed value is recorded as the fuel consumption speed information. The specific calculation process is a conventional technical means for those skilled in the art and will not be elaborated.

[0182] Step S701: Calculate and obtain the combustion duration information of fuel combustion according to the fuel weight information and the fuel consumption speed information.

[0183] The duration value corresponding to the combustion duration information is the approximate duration required for the current fuel combustion to be completed. The calculation formula is , where M is the weight value corresponding to the fuel weight information, v is the speed value corresponding to the fuel consumption speed information, and T is the duration value corresponding to the combustion duration information.

[0184] Step S702: Determine whether the duration corresponding to the operation duration information is greater than the duration corresponding to the combustion duration information.

[0185] The purpose of the determination is to know whether the duration of the current operation exceeds the approximate duration of fuel combustion completion, so as to know whether the fuel combustion is completed.

[0186] Step S7021: If the duration corresponding to the operation duration information is not greater than the duration corresponding to the combustion duration information, then output a signal indicating that the operation is in progress.

[0187] When the duration corresponding to the operation duration information is not greater than the duration corresponding to the combustion duration information, it means that the fuel is probably not completely burned yet. At this time, output a signal indicating that the operation is in progress to identify the operation status of the current boiler, so that the staff can know the working condition of the boiler.

[0188] Step S7022: If the duration corresponding to the operation duration information is greater than the duration corresponding to the combustion duration information, then output a signal indicating that the operation is completed.

[0189] When the duration corresponding to the operation duration information is greater than the duration corresponding to the combustion duration information, it indicates that the operation duration of the boiler at this time is greater than the duration required for complete fuel combustion. The fuel may have been completely burned. An operation completion signal is output for identification, so that the staff can know the working condition of the boiler, so that the staff can observe the specific condition of the boiler, so as to reduce the situation where the staff needs to continuously monitor the working state of the boiler and reduce the workload of the staff.

[0190] Referring to Figure 8 , based on the same inventive concept, an embodiment of the present invention provides a boiler combustion control system for a thermal power plant, including:

[0191] An acquisition module, configured to acquire fuel weight information;

[0192] A processing module, connected to the acquisition module and the judgment module, for storing and processing information;

[0193] The processing module calculates and acquires fuel volume information according to the weight corresponding to the fuel weight information and a preset density value;

[0194] The processing module calculates and acquires boiler air volume information according to the preset boiler volume and the volume value corresponding to the fuel volume information;

[0195] The processing module calculates and acquires boiler oxygen volume information according to the boiler air volume information and a preset oxygen ratio value;

[0196] The processing module matches the weight information and oxygen information stored in the preset fuel oxygen database with the fuel weight information to determine the reaction oxygen volume information;

[0197] A judgment module, configured to judge whether the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reaction oxygen volume information;

[0198] If the judgment module judges that the volume value corresponding to the boiler oxygen volume information is not less than the volume value corresponding to the reaction oxygen volume information, the processing module outputs a normal combustion signal;

[0199] If the judgment module judges that the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reaction oxygen volume information, the processing module calculates the difference to obtain the difference volume information, and controls the oxygen supply port preset to blow out the oxygen corresponding to the volume value of the difference volume information. The difference is the difference between the volume value corresponding to the reaction oxygen volume information and the volume value corresponding to the boiler oxygen volume information;

[0200] An oxygen supply speed determination module, which determines the oxygen supply speed according to the oxygen consumption speed, so that normal combustion can occur inside the boiler;

[0201] The boiler startup determination module is used to determine whether the boiler starts, so as to reduce the occurrence of mis-startup of the boiler;

[0202] The extrusion determination module is used to determine whether the staff's key extrusion is continuous extrusion, so as to reduce the occurrence of the boiler starting due to multiple mis-extrusions with too long time intervals;

[0203] The limited time duration determination module is used to determine the limited time duration;

[0204] The oxygen distribution determination module is used to effectively distribute the oxygen provided by the oxygen supply port, so as to further improve the combustion efficiency inside the boiler;

[0205] The combustion completion reminder module enables the boiler with substantially completed combustion to emit corresponding reminder signals, so that the staff can timely know the combustion situation of the boiler.

[0206] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the above-mentioned division of each functional module is used as an example. In actual applications, the above functions can be allocated to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working processes of the above-described system, device, and unit can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0207] The embodiment of the present invention provides a computer-readable storage medium storing a computer program that can be loaded and executed by a processor for the method of controlling the combustion of a thermal power plant boiler.

[0208] Computer storage media include, for example: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0209] Based on the same inventive concept, the embodiment of the present invention provides an intelligent terminal including a memory and a processor, and a computer program that can be loaded and executed by the processor for the method of controlling the combustion of a thermal power plant boiler is stored on the memory.

[0210] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the above-mentioned division of each functional module is used as an example. In actual applications, the above functions can be allocated to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working processes of the above-described system, device, and unit can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0211] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Any feature disclosed in this specification (including the abstract and drawings), unless specifically described, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically described, each feature is only an example of a series of equivalent or similar features.

Claims

1. A boiler combustion control method for a thermal power plant, characterized in that, Including: Obtain fuel weight information; Calculate and obtain fuel volume information according to the weight corresponding to the fuel weight information and a preset density value; Calculate and obtain boiler air volume information according to the preset boiler volume and the volume value corresponding to the fuel volume information; Calculate and obtain boiler oxygen volume information according to the boiler air volume information and the preset oxygen ratio value; Match the weight information and oxygen information stored in the preset fuel-oxygen database with the fuel weight information to determine the reaction oxygen volume information; Judge whether the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reaction oxygen volume information; If the volume value corresponding to the boiler oxygen volume information is not less than the volume value corresponding to the reaction oxygen volume information, output a normal combustion signal; If the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reaction oxygen volume information, calculate the difference to obtain difference volume information, and control the preset oxygen supply port to blow out oxygen with a volume value corresponding to the difference volume information. The difference is the difference between the volume value corresponding to the reaction oxygen volume information and the volume value corresponding to the boiler oxygen volume information.

2. The method for controlling the combustion of a boiler in a thermal power plant according to claim 1, wherein: It also includes an oxygen supply method for the oxygen supply port, and this method includes: Obtain oxygen concentration information and an operation start signal; Start timing when the operation start signal is obtained to output operation duration information, and define the oxygen concentration information at this time as the initial oxygen concentration information; Judge whether the duration corresponding to the operation duration information is consistent with the preset limited duration; If the duration corresponding to the operation duration information is not consistent with the limited duration, maintain the timing state of the operation duration information; If the duration corresponding to the operation duration information is consistent with the limited duration, define the oxygen concentration information at this time as the termination oxygen concentration information; Calculate and obtain oxygen consumption speed information according to the termination oxygen concentration information, the initial oxygen concentration information, and the limited duration; Control the oxygen supply port to supply oxygen at a speed value corresponding to the oxygen consumption speed information.

3. The method for controlling the combustion of a boiler in a thermal power plant according to claim 2, wherein: It also includes a method for obtaining an operation start signal, and this method includes: Control the preset maintenance duration countdown when the fuel weight information is obtained; Judge whether the weight value corresponding to the fuel weight information changes before the maintenance duration countdown reaches zero; If the weight value corresponding to the fuel weight information changes before the maintenance duration countdown reaches zero, control the maintenance duration to start counting down again; If the weight value corresponding to the fuel weight information does not change before the maintenance duration countdown reaches zero, output a ready signal and maintain it; Obtain a key pressing signal when the ready signal exists; Count according to the key pressing signal to obtain pressing times information; Judge whether the number value corresponding to the pressing times information is consistent with the preset pressing value; If the number value corresponding to the pressing times information is not consistent with the pressing value, control the boiler to maintain the current state; If the number value corresponding to the pressing times information is consistent with the pressing value, output an operation start signal.

4. The method for controlling the combustion of a boiler in a thermal power plant according to claim 3, wherein: The method for obtaining an operation start signal also includes: Control the preset pressing duration countdown when the key pressing signal is obtained; Judge whether a key pressing signal is obtained again before the pressing duration countdown reaches zero; If a key pressing signal is obtained again before the countdown of the extrusion duration reaches zero, the value corresponding to the number of extrusion times in the extrusion number information is incremented by one; If a key pressing signal is not obtained again before the countdown of the extrusion duration reaches zero, the value corresponding to the number of extrusion times in the extrusion number information is reset to zero.

5. The method for controlling the combustion of a boiler in a thermal power plant according to claim 2, wherein: It also includes a method for determining a limited duration, and the method includes: Matching the oxygen volume information, duration value stored in the preset duration database with the boiler oxygen volume information to determine the limited duration; Obtaining oxygen concentration change information every preset detection time period within the limited duration; Calculating the difference between the change values corresponding to the oxygen concentration change information in adjacent detection time periods to obtain a fluctuation value; Judging whether the fluctuation value is greater than the preset allowable value; If the fluctuation value is not greater than the allowable value, maintain the current state; If the fluctuation value is greater than the allowable value, update the duration corresponding to the current operation duration information to the new limited duration.

6. The method for controlling the combustion of a boiler in a thermal power plant according to claim 2, characterized in that: The oxygen supply method of the oxygen supply port further includes: Dividing the inside of the boiler vertically into a preset number of detection areas, and each detection area is provided with an oxygen supply pipe connected to the oxygen supply port; Obtaining the regional oxygen information in each detection area; Determining the concentration ratio information between the detection areas according to the regional oxygen information; Controlling the regulating opening size of the oxygen supply pipe to adjust the ratio corresponding to the concentration ratio information to the preset reference ratio.

7. The method for controlling the combustion of a boiler in a thermal power plant according to claim 2, wherein: It also includes: Determining the fuel consumption speed information according to the speed value corresponding to the oxygen consumption speed information; Calculating and obtaining the combustion duration information of the fuel combustion according to the fuel weight information and the fuel consumption speed information; Judging whether the duration corresponding to the operation duration information is greater than the duration corresponding to the combustion duration information; If the duration corresponding to the operation duration information is not greater than the duration corresponding to the combustion duration information, output a signal indicating that the operation is in progress; If the duration corresponding to the operation duration information is greater than the duration corresponding to the combustion duration information, output a signal indicating that the operation is completed.

8. A boiler combustion control system for a thermal power plant, characterized in that, It includes: An acquisition module for acquiring fuel weight information; A processing module, connected to the acquisition module and the judgment module, for storing and processing information; The processing module calculates and obtains the fuel volume information according to the weight corresponding to the fuel weight information and the preset density value; The processing module calculates and obtains the boiler air volume information according to the preset boiler volume and the volume value corresponding to the fuel volume information; The processing module calculates and obtains the boiler oxygen volume information according to the boiler air volume information and the preset oxygen ratio value; The processing module matches the weight information and oxygen information stored in the preset fuel oxygen database with the fuel weight information to determine the reaction oxygen volume information; A judgment module for judging whether the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reaction oxygen volume information; If the judgment module judges that the volume value corresponding to the boiler oxygen volume information is not less than the volume value corresponding to the reaction oxygen volume information, the processing module outputs a normal combustion signal; If the judgment module determines that the volume value corresponding to the boiler oxygen volume information is less than the volume value corresponding to the reaction oxygen volume information, the processing module calculates the difference to obtain the difference volume information, and controls the preset oxygen supply port to blow out oxygen with a volume value corresponding to the difference volume information, where the difference is the difference between the volume value corresponding to the reaction oxygen volume information and the volume value corresponding to the boiler oxygen volume information.

9. An intelligent terminal, characterized in that, It includes a memory and a processor, and a computer program capable of being loaded and executed by the processor, such as any one of the methods in claims 1 to 7, is stored on the memory.

10. A computer-readable storage medium, characterized in that, A computer program capable of being loaded and executed by the processor, such as any one of the methods in claims 1 to 7, is stored.

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