Method and device for measuring amount of coal entering boiler

Abstract

The invention provides a method and device for measuring the amount of coal entering a boiler, the method is applied to a thermal generator set, the thermal generator set comprises a raw coal bunker, a scraper type coal feeder, a coal pulverizing system, a pulverized coal bunker, a pulverized coal feeder and the boiler, and the scraper type coal feeder is used for conveying coal in the raw coal bunker to the coal pulverizing system; the coal pulverizing system is used for pulverizing coal and outputting the pulverized coal to the pulverized coal bunker, the pulverized coal feeder is used for outputting pulverized coal in the pulverized coal bunker to the boiler, and the method comprises the steps that the total number of rotation turns of a power generator of the pulverized coal feeder and the total coal feeding amount, measured by the six-section boiler dividing metering scale, of the boiler within the preset time range are obtained; based on the total number of rotation turns of the generator and the total coal feed amount, determining a sub-coal feed amount corresponding to the number of single rotation turns of the generator of the pulverized coal feeder; acquiring the statistical duration of the amount of coal entering the boiler; determining the statistical number of rotation turns of a generator of the pulverized coal feeder in the statistical duration; and determining the amount of coal entering the boiler corresponding to the statistical duration based on the sub-coal feeding amount corresponding to the number of single turns of rotation of the generator and the statistical number of turns of rotation.

Description

Technical Field

[0001] The invention relates to the technical field of boiler control, and in particular to a method and device for measuring the amount of coal entering a boiler. Background Art

[0002] At present, thermal power generation is one of the main power generation methods, and thermal power generating units are also the main equipment of power plants. Many generating units use scraper-type coal feeders to transport coal. Coal is the main raw material for power generation, and relevant personnel need to know the use of incoming coal in a timely manner, for example, they need to know the amount of coal entering the boiler in a timely manner.

[0003] However, for generator sets using scraper-type coal feeders, it is impossible to measure the amount of coal fed into the boiler, which makes it difficult for relevant personnel to understand the use of coal. Summary of the invention

[0004] The invention provides a method and device for measuring the amount of coal entering a boiler, which are used to solve the technical problem in the prior art that the amount of coal entering a boiler of a generator set using a scraper type coal feeder cannot be measured.

[0005] On the one hand, the present invention provides a method for measuring the amount of coal entering a boiler, the method being applied to a thermal power generating set, the thermal power generating set comprising a raw coal bunker, a scraper-type coal feeder, a pulverizing system, a pulverized coal bunker, a pulverizing feeder and a boiler, wherein the scraper-type coal feeder is used to transport the coal in the raw coal bunker to the pulverizing system, the pulverizing system is used to crush the coal and output it to the pulverized coal bunker, the pulverizing feeder is used to output the pulverized coal in the pulverized coal bunker to the boiler, the method being executed by a distributed control system, the method comprising:

[0006] Obtain the total number of revolutions of the generator of the powder feeder within a preset time range and the total coal intake of the boiler measured by the six-stage furnace metering scale;

[0007] Based on the total number of revolutions of the generator and the total coal intake, determining the sub-coal intake corresponding to a single number of revolutions of the generator of the powder feeder;

[0008] Obtaining the statistical duration of the amount of coal entering the boiler;

[0009] Determine the number of rotations of the generator of the powder feeder during the statistical time period;

[0010] The amount of coal entering the boiler corresponding to the statistical duration is determined based on the sub-coal intake corresponding to a single number of revolutions of the generator and the statistical number of revolutions.

[0011] According to a method for measuring the amount of coal entering a boiler provided by the present invention, the generator speed of the powder feeder is controlled by a frequency converter, and the distributed control system is used to obtain the generator speed of the powder feeder from the frequency converter. Before obtaining the total number of rotations of the generator of the powder feeder within a preset time range and the total amount of coal entering the boiler measured by the six-stage sub-furnace metering scale, the method further includes:

[0012] The AO output channel of the frequency converter and the AI ​​card of the distributed control system are calibrated respectively, so that the signals of the calibrated AO output channel and the AI ​​card are consistent.

[0013] According to a method for measuring the amount of coal entering a boiler provided by the present invention, the AO output channel of the frequency converter and the AI ​​card of the distributed control system are calibrated respectively, including:

[0014] Determine that the signal type output by the AO output channel is consistent with the signal type received by the AI ​​card;

[0015] Based on the input range of the AI ​​card, the range of the output channel is set so that the signal output by the output channel is within the acceptable range of the AI ​​card;

[0016] The zero bias and full scale value of the AO output channel are adjusted so that the output signal of the AO output channel corresponds linearly to the input signal of the AI ​​card.

[0017] According to a method for measuring the amount of coal entering a boiler provided by the present invention, the method determines the amount of coal entering a boiler corresponding to a single number of revolutions of the generator of the powder feeder based on the total number of revolutions of the generator and the total amount of coal entering the boiler, including:

[0018] A plane coordinate system is established by taking the number of revolutions of the generator of the powder feeder at each moment as the first coordinate axis and taking the amount of coal fed into the boiler at each moment as the second coordinate axis;

[0019] Determine the coordinate positions of the total number of revolutions of the generator and the total amount of coal fed in the plane coordinate system at the same time;

[0020] Obtaining a linear equation based on the coordinate position and the zero point coordinate of the plane coordinate system;

[0021] Based on the slope of the linear equation, the amount of coal fed corresponding to a single number of revolutions of the generator of the powder feeder is obtained.

[0022] According to a method for measuring the amount of coal entering a boiler provided by the present invention, before obtaining the total number of revolutions of the generator of the powder feeder within a preset time range and the total amount of coal entering the boiler measured by the six-stage furnace metering scale, the method further includes:

[0023] The system time of the distributed control system and the metering time of the six-stage furnace metering scale are calibrated to keep the system time and the metering time consistent.

[0024] A method for measuring the amount of coal entering a boiler provided by the present invention further includes:

[0025] Obtaining a query instruction for the amount of coal entering the boiler;

[0026] Based on the query instruction, a query interface for entering the boiler coal quantity is generated; wherein the query interface includes a plurality of query conditions;

[0027] Obtaining a query condition selected from the plurality of query conditions;

[0028] Based on the selected query condition, the boiler coal quantity is queried and displayed on the query interface.

[0029] According to a method for measuring the amount of coal entering a boiler provided by the present invention, the query conditions include daily query, monthly query, time-defined query and printing query results.

[0030] According to a method for measuring the amount of coal entering a boiler provided by the present invention, when the boiler corresponds to multiple coal feeders, the sum of the generator speeds of the coal feeders within the preset time range is taken as the total number of rotations of the generator.

[0031] According to a method for measuring the amount of coal entering a boiler provided by the present invention, the amount of coal entering the boiler corresponding to the statistical duration is determined based on the amount of coal entering the boiler corresponding to a single number of revolutions of the generator and the statistical number of revolutions, including:

[0032] The product of the sub-coal intake amount and the statistical number of rotations is calculated as the amount of coal entering the boiler corresponding to the statistical duration.

[0033] On the other hand, the present invention further provides a device for measuring the amount of coal entering a boiler, the device being applied to a thermal power generating set, the thermal power generating set comprising a raw coal bunker, a scraper-type coal feeder, a pulverizing system, a pulverized coal bunker, a pulverizing feeder and a boiler, wherein the scraper-type coal feeder is used to transport the coal in the raw coal bunker to the pulverizing system, the pulverizing system is used to crush the coal and output it to the pulverized coal bunker, the pulverizing feeder is used to output the pulverized coal in the pulverized coal bunker to the boiler, the device is executed by a distributed control system, and the device comprises:

[0034] An information acquisition module is used to obtain the total number of revolutions of the generator of the powder feeder within a preset time range and the total coal intake of the boiler measured by the six-stage furnace metering scale;

[0035] A single-turn coal quantity determination module is used to determine the sub-coal quantity corresponding to a single turn of the generator of the powder feeder based on the total number of turns of the generator and the total coal quantity;

[0036] A duration statistics module, used to obtain the statistical duration of the amount of coal entering the boiler;

[0037] A generator rotation number determination module, used to determine the rotation number of the generator of the powder feeder during the statistical time period;

[0038] The boiler coal quantity determination module is used to determine the amount of coal entering the boiler corresponding to the statistical duration based on the sub-coal intake corresponding to the single number of revolutions of the generator and the statistical number of revolutions.

[0039] On the other hand, the present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a method for measuring the amount of coal entering a boiler as described in any one of the above is implemented.

[0040] The method and device for measuring the amount of coal entering a boiler provided by the present invention obtain the total number of rotations of the generator of a powder feeder within a preset time range and the total coal intake of the boiler measured by a six-stage sub-furnace metering scale, and determine the sub-coal intake corresponding to a single rotation of the generator of the powder feeder based on the total number of rotations of the generator and the total coal intake. Based on the sub-coal intake corresponding to a single rotation of the generator and the statistical number of rotations, the amount of coal entering the boiler corresponding to the statistical duration is determined, which can avoid the need to modify a generator set using a scraper coal feeder, save a lot of modification costs, reduce energy consumption, and give full play to the functions of DCS. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 It is a schematic flow chart of a method for measuring the amount of coal entering a boiler provided in an embodiment of the present invention;

[0043] Figure 2 is a schematic diagram of the structure of a device for measuring the amount of coal entering a boiler provided in an embodiment of the present invention;

[0044] Figure 3 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Figure 1 The present invention is a flowchart of a method for measuring the amount of coal entering a boiler provided by an embodiment of the present invention. The measuring method can be applied to a thermal power generating set, which may include a raw coal bunker, a scraper-type coal feeder, a pulverizing system, a pulverized coal bunker, a pulverizing feeder, and a boiler, wherein the scraper-type coal feeder is used to transport coal in the raw coal bunker to the pulverizing system, the pulverizing system is used to crush the coal and output it to the pulverized coal bunker, and the pulverizing feeder is used to output the pulverized coal in the pulverized coal bunker to the boiler.

[0047] The generator set can include 4 raw coal bunkers, each of which corresponds to a scraper coal feeder. There can be 4 pulverizing systems. There can be 2 pulverized coal bunkers. Two pulverizing systems can correspond to 1 pulverized coal bunker, for example, pulverizing system No. 1 and pulverizing system No. 2 correspond to pulverized coal bunker No. 1, and pulverizing system No. 3 and pulverizing system No. 4 correspond to pulverized coal bunker No. 2. There can be 12 pulverizing feeders under each pulverized coal bunker. The amount of coal entering the boiler is adjusted by adjusting the speed of the pulverizing feeder. The generator set can also be equipped with an auger system to enable the pulverized coal produced by pulverizing system No. 1 and pulverizing system No. 2 to enter pulverized coal bunker No. 2; or the pulverized coal produced by pulverizing system No. 3 and pulverizing system No. 4 to enter pulverized coal bunker No. 1.

[0048] The method may be executed by a distributed control system (DCS). The method for measuring the amount of coal entering a boiler may include the following steps 101 to 105 .

[0049] 101. Obtain the total number of revolutions of the generator of the powder feeder within a preset time range and the total amount of coal fed into the boiler measured by the six-stage boiler metering scale.

[0050] In this step, the preset time range can be set, for example, set to 0:00 to 24:00 every day, or 0:00 on a certain day to 24:00 three days later, or 0:00 on a certain day to 24:00 seven days later, etc., which will not be listed here one by one, and can be set according to actual needs. The six-section furnace weighing scale only needs to measure the total coal intake of the boiler within the preset time range in this step, and does not need to be used in subsequent steps, that is, the six-section furnace weighing scale does not need to work for a long time, thereby reducing energy consumption. The six-section furnace weighing scale is calibrated, for example, compared with the four-section scale within the specified time to ensure the accuracy of the measurement data of the six-section furnace weighing scale.

[0051] 102. Based on the total number of revolutions of the generator and the total amount of coal fed, determine the amount of coal fed corresponding to a single number of revolutions of the generator of the powder feeder.

[0052] In this step, based on the total number of revolutions of the generator and the total coal intake, the sub-coal intake corresponding to a single number of revolutions of the generator of the powder feeder is determined, which may specifically include:

[0053] The ratio of the total coal intake to the total number of revolutions of the generator is calculated as the sub-coal intake corresponding to a single number of revolutions of the generator of the powder feeder. Steps 101 and 102 may be pre-test steps, that is, the total number of revolutions of the generator of the powder feeder within a preset time range and the total coal intake of the boiler measured by the six-stage sub-furnace metering scale may be obtained in advance through testing, that is, the sub-coal intake corresponding to a single number of revolutions of the generator may also be obtained in advance through testing, so that the generator set using the scraper type coal feeder may be avoided from being modified.

[0054] 103. Obtain the statistical time of the amount of coal entering the boiler.

[0055] In this step, the statistical duration can also be set. Generally, the statistical duration and the aforementioned preset time range can be set through the visual interface.

[0056] 104. Determine the number of revolutions of the generator of the powder feeder during the statistical time.

[0057] In this step, the rotation speed of the generator of the powder feeder per unit time can be known in advance, for example, it can be known through a pre-test or according to the equipment parameters of the generator. Therefore, the product of the rotation speed of the generator per unit time and the statistical time length can represent the number of statistical rotations.

[0058] 105. Based on the amount of coal entering the boiler corresponding to a single number of revolutions of the generator and the statistical number of revolutions, determine the amount of coal entering the boiler corresponding to the statistical duration.

[0059] In this step, based on the sub-coal intake corresponding to the number of revolutions of the generator and the number of revolutions counted, the amount of coal entering the boiler corresponding to the statistical duration is determined, which may specifically include:

[0060] The product of the coal intake and the number of statistical rotations is calculated as the amount of coal entering the boiler corresponding to the statistical duration. This step can obtain the amount of coal entering the boiler based on the number of statistical rotations of the generator, which is very simple and convenient.

[0061] In this embodiment, the total number of revolutions of the powder feeder generator within a preset time range and the total coal intake of the boiler measured by the six-stage furnace metering scale are obtained, and based on the total number of revolutions of the generator and the total coal intake, the sub-coal intake corresponding to a single revolution of the powder feeder generator is determined, and based on the sub-coal intake corresponding to a single revolution of the generator and the statistical number of revolutions, the amount of coal entering the boiler corresponding to the statistical duration is determined, which can avoid the modification of the generator set using a scraper coal feeder, save a lot of modification costs, reduce energy consumption, and give full play to the function of DCS.

[0062] In one embodiment of the present specification, the generator speed of the powder feeder is controlled by a frequency converter, and the distributed control system is used to obtain the generator speed of the powder feeder from the frequency converter. Before obtaining the total number of rotations of the generator of the powder feeder within a preset time range and the total coal intake of the boiler measured by the six-stage sub-furnace metering scale, it also includes:

[0063] The AO output channel of the inverter and the AI ​​card of the distributed control system are calibrated respectively to ensure that the signals of the calibrated AO output channel and the AI ​​card are consistent.

[0064] In this embodiment, AO represents output. AI represents input. That is, the distributed control system receives information output by the AO output channel of the frequency converter through the AI ​​card. The AO output channel of the frequency converter and the AI ​​card of the distributed control system are calibrated respectively, so that the signals of the calibrated AO output channel and the AI ​​card are consistent, so that the total number of rotations of the generator of the powder feeder within the preset time range is the same as the actual number of rotations of the generator, thereby ensuring the accuracy of the amount of coal entering the boiler obtained in the subsequent steps.

[0065] In one embodiment of the present specification, the AO output channel of the frequency converter and the AI ​​card of the distributed control system are calibrated respectively, which may include:

[0066] Make sure the signal type output by the AO output channel is consistent with the signal type received by the AI ​​card;

[0067] Based on the input range of the AI ​​card, set the range of the output channel so that the signal output by the output channel is within the acceptable range of the AI ​​card;

[0068] Adjust the zero bias and full scale value of the AO output channel so that the output signal of the AO output channel corresponds linearly to the input signal of the AI ​​card.

[0069] In this embodiment, it is determined that the signal type output by the AO output channel is consistent with the signal type received by the AI ​​card. For example, the signal type output by the AO output channel is the generator speed and the current corresponding to the speed, and the signal type received by the AI ​​card is also the generator speed and the current corresponding to the speed. Based on the input range of the AI ​​card, the range of the output channel is set so that the signal output by the output channel is within the acceptable range of the AI ​​card. For example, the signal output by the output channel is 4mA corresponding to the speed 0r / min, and 20mA corresponding to the speed 1200r / min; the signal input by the AI ​​card is 4mA corresponding to the speed 0r / min, and 20mA corresponding to the speed 1200r / min. Adjust the zero bias and full scale value of the AO output channel so that the output signal of the AO output channel corresponds linearly to the input signal of the AI ​​card, so that the accurate number of rotations of the generator can be obtained, ensuring the accuracy of the final amount of coal entering the furnace. In general, a calibration tool or software can be used to input a known standard signal and adjust the output signal of the AO output channel until the AI ​​card can accurately read the output signal.

[0070] In addition, an isolator can be used between the AO output and the AI ​​input to prevent electrical interference and ensure stable signal transmission. During the calibration process, the AO output signal can be monitored in real time, and fine-tuned according to the feedback (received signal) of the AI ​​card until the output signal is consistent with the received signal. The signal type can generally be selected as a current signal, which (such as 4-20mA) has good anti-interference ability.

[0071] In one embodiment of the present specification, based on the total number of revolutions of the generator and the total coal input amount, determining the sub-coal input amount corresponding to a single number of revolutions of the generator of the powder feeder may include:

[0072] The plane coordinate system is established by taking the number of revolutions of the generator of the powder feeder at each moment as the first coordinate axis and the amount of coal fed into the boiler at each moment as the second coordinate axis;

[0073] Determine the coordinate positions of the total number of revolutions of the generator and the total amount of coal fed in the plane coordinate system at the same time;

[0074] The linear equation is obtained based on the coordinate position and the zero point coordinate of the plane coordinate system;

[0075] Based on the slope of the linear equation, the amount of coal fed corresponding to a single revolution of the generator of the powder feeder is obtained.

[0076] In this embodiment, the plane coordinate system can be an XY plane coordinate system. The zero point coordinate of the plane coordinate system can indicate that the cumulative number of revolutions of the generator is zero and the amount of coal fed into the boiler is zero, that is, there is neither a cumulative number of revolutions of the generator nor an amount of coal fed into the boiler. When the first coordinate axis is the X-axis and the second coordinate axis is the Y-axis, the slope of the linear equation indicates the amount of powder fed into the boiler by one revolution of the generator of the powder feeder. When the first coordinate axis is the Y-axis and the second coordinate axis is the X-axis, the slope of the linear equation indicates the number of revolutions of the generator required for the powder feeder to feed a unit weight of powder into the boiler.

[0077] In some other cases, the linear equation may be obtained without using the zero point coordinates of the plane coordinate system. The linear equation may be obtained using two or more total rotations of the generator and their corresponding total coal intake. For example, the linear equation is obtained by a first set of data (m1, n1) and a second set of data (m2, n2). Among them, m1 may represent the total rotations of the generator at the first moment, and n1 may represent the total coal intake at the first moment; m2 may represent the total rotations of the generator at the second moment, and n2 may represent the total coal intake at the second moment.

[0078] In an embodiment of the present specification, before obtaining the total number of revolutions of the generator of the powder feeder within a preset time range and the total coal intake of the boiler measured by the six-stage furnace metering scale, the following steps may also be included:

[0079] The system time of the distributed control system and the metering time of the six-section furnace metering scale are calibrated to ensure that the system time and metering time are consistent.

[0080] In this embodiment, the system time of the distributed control system and the metering time of the six-segment sub-furnace metering scale are proofread to keep the system time consistent with the metering time, so as to ensure that the number of revolutions of the generator obtained is the same as the time when the amount of coal entering the furnace is at the same time, thereby ensuring the accuracy of the amount of coal entering the furnace corresponding to a single revolution of the generator. In general, the distributed control system can be synchronized with a standard time source (such as a network time protocol NTP server) to ensure the accuracy of the distributed control system time. Then, the metering time of the six-segment sub-furnace metering scale is debugged to keep it consistent with the system time of the distributed control system. Of course, the metering time of the six-segment sub-furnace metering scale can also be synchronized with a standard time source.

[0081] In one embodiment of the present specification, the method for controlling the amount of coal entering the boiler may further include:

[0082] Get the query instruction of the amount of coal entering the boiler;

[0083] Based on the query instruction, a query interface for entering the boiler coal quantity is generated; wherein the query interface may include multiple query conditions;

[0084] Get the selected query condition from multiple query conditions;

[0085] Based on the selected query conditions, the boiler coal quantity is queried and displayed on the query interface.

[0086] Specifically, the query conditions may include daily query, monthly query, time-defined query, and printing query results.

[0087] In this embodiment, when the daily query is selected, the amount of coal entering the boiler and the number of revolutions of the generator on that day can be queried. Similarly, when the monthly query is selected, the amount of coal entering the boiler and the number of revolutions of the generator on that month can be queried. Time-defined query, that is, the user can enter the query time period according to their needs. When the time-defined query is selected, the user can enter the time range they need to query. In addition, a report on the amount of coal entering the boiler on that day can be generated in units of days. The report can include the number of revolutions of the generator at different times of the day and its corresponding amount of coal entering the boiler.

[0088] In one embodiment of the present specification, when the boiler corresponds to multiple powder feeders, the sum of the generator speeds of the powder feeders within a preset time range is taken as the total number of rotations of the generator.

[0089] In this embodiment, when there are multiple pulverized coal feeders conveying pulverized coal to the boiler, the number of rotations of the generators of the pulverized coal feeders may be summed up to be the total number of rotations of the generators.

[0090] The working principle of the six-section furnace metering scale is as follows: the six-section furnace metering scale can realize the statistics of the amount of coal entering the raw coal hopper of each boiler, and accumulate and calculate the amount of coal consumed by each boiler every day. The six-section furnace metering scale can count the amount of coal when the coal enters the raw coal bunker, count the amount of coal entering the raw coal bunker, and accumulate the amount of coal in the raw coal bunker belonging to each unit, and count the amount of coal entering the raw coal bunker every day. Step 101 can also be understood as obtaining the total number of revolutions of the generator of the powder feeder within a preset time range and the total coal intake of the boiler. The total coal intake of the boiler can be measured by the six-section furnace metering scale. Of course, it can also be obtained by other means, such as a four-section scale, etc., which is not specifically limited here.

[0091] Based on the same general inventive concept, the present invention also protects a device for measuring the amount of coal entering a boiler, such as Figure 2 As shown. The following is a description of the measuring device for the amount of coal entering the boiler provided by the present invention. The measuring device for the amount of coal entering the boiler described below and the measuring method for the amount of coal entering the boiler described above can be referred to each other. The measuring device for the amount of coal entering the boiler may include an information acquisition module 201, a single-turn coal amount determination module 202, a duration statistics module 203, a generator rotation number determination module 204, and a boiler coal amount determination module 205.

[0092] The information acquisition module 201 is used to obtain the total number of revolutions of the generator of the powder feeder within a preset time range and the total coal intake of the boiler measured by the six-stage furnace metering scale;

[0093] The single-turn coal quantity determination module 202 is used to determine the sub-coal quantity corresponding to a single turn of the generator of the powder feeder based on the total number of turns of the generator and the total coal quantity;

[0094] The duration statistics module 203 is used to obtain the statistical duration of the amount of coal entering the boiler;

[0095] The generator rotation number determination module 204 is used to determine the rotation number of the generator of the powder feeder during the statistical time period;

[0096] The boiler coal quantity determination module 205 is used to determine the amount of coal entering the boiler corresponding to the statistical duration based on the sub-coal intake amount corresponding to a single number of revolutions of the generator and the statistical number of revolutions.

[0097] In one embodiment of the present specification, the device for measuring the amount of coal entering the boiler further comprises a first calibration module for calibrating the AO output channel of the frequency converter and the AI ​​card of the distributed control system respectively, so that the signals of the calibrated AO output channel and the AI ​​card are consistent.

[0098] Specifically, the first calibration module is used to determine whether the signal type output by the AO output channel is consistent with the signal type received by the AI ​​card;

[0099] Based on the input range of the AI ​​card, the range of the output channel is set so that the signal output by the output channel is within the acceptable range of the AI ​​card;

[0100] The zero bias and full scale value of the AO output channel are adjusted so that the output signal of the AO output channel corresponds linearly to the input signal of the AI ​​card.

[0101] In one embodiment of the present specification, the single-circuit coal quantity determination module 202 is further used for:

[0102] A plane coordinate system is established by taking the number of revolutions of the generator of the powder feeder at each moment as the first coordinate axis and taking the amount of coal fed into the boiler at each moment as the second coordinate axis;

[0103] Determine the coordinate positions of the total number of revolutions of the generator and the total amount of coal fed in the plane coordinate system at the same time;

[0104] Obtaining a linear equation based on the coordinate position and the zero point coordinate of the plane coordinate system;

[0105] Based on the slope of the linear equation, the amount of coal fed corresponding to a single number of revolutions of the generator of the powder feeder is obtained.

[0106] In one embodiment of the present specification, the device for measuring the amount of coal entering the boiler further includes a second calibration module. The second calibration module is used to:

[0107] The system time of the distributed control system and the metering time of the six-stage furnace metering scale are calibrated to keep the system time and the metering time consistent.

[0108] In one embodiment of the present specification, the device for measuring the amount of coal entering the boiler further includes a query module. The query module is used to:

[0109] Obtaining a query instruction for the amount of coal entering the boiler;

[0110] Based on the query instruction, a query interface for entering the boiler coal quantity is generated; wherein the query interface includes a plurality of query conditions;

[0111] Obtaining a query condition selected from the plurality of query conditions;

[0112] Based on the selected query condition, the boiler coal quantity is queried and displayed on the query interface.

[0113] Specifically, the query conditions include daily query, monthly query, time-defined query and print query results.

[0114] In one embodiment of the present specification, the information acquisition module is further configured to, when the boiler corresponds to multiple powder feeders, use the sum of the generator speeds of the powder feeders within the preset time range as the total number of rotations of the generator.

[0115] In one embodiment of this specification, the single-loop coal quantity determination module is further used for:

[0116] The ratio of the total coal feed amount to the total number of revolutions of the generator is calculated as the sub-coal feed amount corresponding to a single number of revolutions of the generator of the powder feeder.

[0117] Figure 3 It is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0118] like Figure 3As shown, the electronic device may include: a processor 610, a communication interface 620, a memory 630 and a communication bus 640, wherein the processor 610, the communication interface 620 and the memory 630 communicate with each other through the communication bus 640. The processor 610 may call the logic instructions in the memory 630 to execute the method for measuring the amount of coal entering the boiler.

[0119] In addition, the logic instructions in the above-mentioned memory 630 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0120] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the measurement method of the amount of coal entering the boiler provided by the above methods.

[0121] In yet another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the method for measuring the amount of coal entering a boiler provided by the above methods.

[0122] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0123] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for measuring the amount of coal entering a boiler, characterized in that: The measuring method is applied to a thermal power generating set, which comprises a raw coal bunker, a scraper-type coal feeder, a pulverizing system, a pulverized coal bunker, a pulverized coal feeder and a boiler, wherein the scraper-type coal feeder is used to transport coal in the raw coal bunker to the pulverizing system, the pulverizing system is used to crush coal and output it to the pulverized coal bunker, and the pulverized coal feeder is used to output the pulverized coal in the pulverized coal bunker to the boiler. The method is executed by a distributed control system, and the method comprises: Obtain the total number of revolutions of the generator of the powder feeder within a preset time range and the total coal intake of the boiler measured by the six-stage furnace metering scale; Based on the total number of revolutions of the generator and the total coal intake, determining the sub-coal intake corresponding to a single number of revolutions of the generator of the powder feeder; Obtaining the statistical duration of the amount of coal entering the boiler; Determine the number of rotations of the generator of the powder feeder during the statistical time period; The amount of coal entering the boiler corresponding to the statistical duration is determined based on the sub-coal intake corresponding to a single number of revolutions of the generator and the statistical number of revolutions.

2. The method for measuring the amount of coal entering a boiler according to claim 1, characterized in that: The generator speed of the powder feeder is controlled by a frequency converter, and the distributed control system is used to obtain the generator speed of the powder feeder from the frequency converter. Before obtaining the total number of rotations of the generator of the powder feeder within a preset time range and the total coal intake of the boiler measured by the six-stage furnace metering scale, it also includes: The AO output channel of the frequency converter and the AI ​​card of the distributed control system are calibrated respectively, so that the signals of the calibrated AO output channel and the AI ​​card are consistent.

3. The method for measuring the amount of coal entering a boiler according to claim 2, characterized in that: The calibrating the AO output channel of the frequency converter and the AI ​​card of the distributed control system respectively includes: Determine that the signal type output by the AO output channel is consistent with the signal type received by the AI ​​card; Based on the input range of the AI ​​card, the range of the output channel is set so that the signal output by the output channel is within the acceptable range of the AI ​​card; The zero bias and full scale value of the AO output channel are adjusted so that the output signal of the AO output channel corresponds linearly to the input signal of the AI ​​card.

4. The method for measuring the amount of coal entering a boiler according to claim 1, characterized in that: The determining, based on the total number of revolutions of the generator and the total coal input amount, of the sub-coal input amount corresponding to a single number of revolutions of the generator of the powder feeder comprises: A plane coordinate system is established by taking the number of revolutions of the generator of the powder feeder at each moment as the first coordinate axis and taking the amount of coal fed into the boiler at each moment as the second coordinate axis; Determine the coordinate positions of the total number of revolutions of the generator and the total amount of coal fed in the plane coordinate system at the same time; Obtaining a linear equation based on the coordinate position and the zero point coordinate of the plane coordinate system; Based on the slope of the linear equation, the amount of coal fed corresponding to a single number of revolutions of the generator of the powder feeder is obtained.

5. The method for measuring the amount of coal entering a boiler according to claim 1, characterized in that: Before obtaining the total number of revolutions of the generator of the powder feeder within the preset time range and the total coal intake of the boiler measured by the six-stage furnace metering scale, the method further includes: The system time of the distributed control system and the metering time of the six-stage furnace metering scale are calibrated to keep the system time and the metering time consistent.

6. The method for measuring the amount of coal entering a boiler according to claim 1, characterized in that: Also includes: Obtaining a query instruction for the amount of coal entering the boiler; Based on the query instruction, a query interface for entering the boiler coal quantity is generated; wherein the query interface includes a plurality of query conditions; Obtaining a query condition selected from the plurality of query conditions; Based on the selected query condition, the boiler coal quantity is queried and displayed on the query interface.

7. The method for measuring the amount of coal entering a boiler according to claim 6, characterized in that: The query conditions include daily query, monthly query, time customized query and printing query results.

8. The method for measuring the amount of coal entering a boiler according to claim 1, characterized in that: When the boiler corresponds to multiple powder feeders, the sum of the generator speeds of the powder feeders within the preset time range is taken as the total number of rotations of the generator.

9. The method for measuring the amount of coal entering a boiler according to claim 1, characterized in that: The determining the amount of coal entering the boiler corresponding to the statistical duration based on the amount of coal entering the boiler corresponding to a single number of revolutions of the generator and the statistical number of revolutions includes: The product of the sub-coal intake amount and the statistical number of rotations is calculated as the amount of coal entering the boiler corresponding to the statistical duration.

10. A device for measuring the amount of coal entering a boiler, characterized in that: The measuring device is applied to a thermal power generating set, which comprises a raw coal bunker, a scraper-type coal feeder, a pulverizing system, a pulverized coal bunker, a pulverizing feeder and a boiler, wherein the scraper-type coal feeder is used to transport the coal in the raw coal bunker to the pulverizing system, the pulverizing system is used to crush the coal and output it to the pulverized coal bunker, and the pulverizing feeder is used to output the pulverized coal in the pulverized coal bunker to the boiler. The device is executed by a distributed control system, and the device comprises: An information acquisition module is used to obtain the total number of revolutions of the generator of the powder feeder within a preset time range and the total coal intake of the boiler measured by the six-stage furnace metering scale; A single-turn coal quantity determination module is used to determine the sub-coal quantity corresponding to a single turn of the generator of the powder feeder based on the total number of turns of the generator and the total coal quantity; A duration statistics module, used to obtain the statistical duration of the amount of coal entering the boiler; A generator rotation number determination module, used to determine the rotation number of the generator of the powder feeder during the statistical time period; The boiler coal quantity determination module is used to determine the amount of coal entering the boiler corresponding to the statistical duration based on the sub-coal intake corresponding to the single number of revolutions of the generator and the statistical number of revolutions.

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