A pulverized coal energy-saving combustion device and control system

Abstract

This invention discloses an energy-saving pulverized coal combustion device and control system, relating to the technical field of pulverized coal combustion equipment. It includes a data collection module, a data analysis module, a frequency-temperature reference table generation module, and a control module. It solves the technical problem that traditional combustion equipment often only provides a fixed agitator frequency or simple adjustment methods, making it difficult to determine the relationship between the agitator frequency and combustion temperature, thus causing difficulties in temperature control. By consulting a frequency-temperature reference table, the frequency range corresponding to the required temperature of the combustion furnace is obtained, and the agitator frequency is adjusted according to this range, thereby affecting the combustion temperature of the combustion furnace. This ensures that the agitator frequency is within the frequency range corresponding to the required temperature of the combustion furnace, achieving a certain degree of control over the combustion temperature within the furnace and avoiding energy loss and waste caused by excessively high or low temperatures.

Description

Technical Field

[0001] This invention relates to the field of pulverized coal combustion equipment technology, specifically to an energy-saving pulverized coal combustion equipment and control system. Background Technology

[0002] Coal-saving combustion equipment and control system is a technology used in industrial production to burn pulverized coal. It aims to improve combustion efficiency, save energy and reduce environmental pollution. Pulverized coal combustion is usually carried out in pulverized coal combustion equipment. By setting a stirrer in the combustion furnace, the pulverized coal is more evenly distributed during the combustion process, the combustion is more complete, the accumulation and aggregation of pulverized coal particles in the combustion furnace is reduced, thereby reducing local temperature changes and enhancing the stability of pulverized coal combustion.

[0003] However, when the pulverized coal supply rate, burner adjustment, and other factors affecting the combustion temperature in the combustion furnace, such as ambient temperature and burner cleanliness, are kept constant, the frequency of the agitator in pulverized coal energy-saving combustion equipment has a direct impact on the combustion temperature. At different frequencies, the operating speed of the agitator and the degree of pulverized coal mixing will change, thus affecting the temperature during the combustion process. If the agitator frequency is too high, it will lead to excessive mixing of pulverized coal and an increase in combustion temperature; if the agitator frequency is too low, it will lead to uneven mixing of pulverized coal and a decrease in combustion temperature.

[0004] Traditional combustion equipment often only provides a fixed agitator frequency or a simple adjustment method. The relationship between agitator frequency and combustion temperature is not easy to determine, which makes temperature control difficult. If the temperature is too high, it will lead to over-combustion of fuel and energy loss. If the temperature is too low, it will lead to incomplete combustion and low energy utilization efficiency, which will also cause energy waste. Based on this, a pulverized coal energy-saving combustion equipment and control system is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving pulverized coal combustion device and control system, which solves the technical problem that traditional combustion devices often only provide a fixed agitator frequency or a simple adjustment method, and the relationship between the agitator frequency and the combustion temperature is not easy to determine, which brings difficulties to temperature control.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A pulverized coal energy-saving combustion device and control system, comprising:

[0008] The data collection module is used to acquire the temperature status values ​​of the combustion furnace at different frequencies of the stirrer within a preset time T and the corresponding temperature maintenance duration.

[0009] The data analysis module obtains the temperature state value that maximizes the product between the temperature state value of the combustion furnace at different frequencies and its corresponding temperature maintenance duration, and uses this as the corresponding control temperature value at different frequencies.

[0010] The frequency-temperature comparison table generation module generates change curves based on the control temperature values ​​corresponding to different frequencies. Based on the frequency values ​​and control temperature values ​​at both ends of each frequency segment on the change curve, it generates frequency intervals and temperature intervals corresponding to each frequency segment. It then binds the frequency intervals and temperature intervals corresponding to each frequency segment to generate a frequency-temperature comparison table.

[0011] The control module uses a frequency-temperature lookup table to convert the required combustion temperature of the furnace into a corresponding frequency range, and then controls the frequency of the agitator accordingly based on the frequency range.

[0012] As a further aspect of the present invention: the specific method for obtaining the control temperature values ​​corresponding to different frequencies of the stirrer in the combustion furnace is as follows;

[0013] Select one frequency from the different frequencies of the stirrer as the analysis frequency, obtain the temperature state value of the combustion furnace at the analysis frequency within a preset time T and the corresponding temperature maintenance duration, filter out the temperature state values ​​that satisfy the temperature maintenance duration being greater than the preset threshold Y1 from all temperature state values, then calculate the temperature percentage corresponding to each of the remaining temperature state values ​​at the analysis frequency, obtain the temperature state value corresponding to the maximum temperature percentage, and use it as the control temperature value corresponding to the analysis frequency; repeat the above method to obtain the control temperature values ​​corresponding to the stirrer at different frequencies.

[0014] As a further aspect of the present invention: the specific method for determining the temperature percentage corresponding to each temperature state value at the analysis frequency is as follows:

[0015] The product of each remaining temperature state value at the analysis frequency and its corresponding temperature duration, and the ratio of this product to the sum of the products of all temperature state values ​​at the analysis frequency and their corresponding temperature durations, are used as the temperature percentage corresponding to each temperature state value at the analysis frequency.

[0016] As a further aspect of the present invention: the specific method for generating change curves based on the control temperature values ​​corresponding to different frequencies is as follows:

[0017] A coordinate system is generated by using the same frequency of the stirrer as the horizontal axis and the corresponding control temperature values ​​at different frequencies as the vertical axis. The coordinate points of the control temperature values ​​at different frequencies in the coordinate system are obtained. The origin of the coordinate system is used as the starting point to connect the points in the coordinate system in sequence, thereby generating a change curve.

[0018] As a further aspect of the present invention, the specific method for generating the frequency range and temperature range corresponding to each frequency band is as follows:

[0019] Each line segment on the change curve is marked as a frequency segment. The frequency value and control temperature value corresponding to the two ends of each frequency segment are obtained. The frequency range is generated by marking the frequency values ​​at the two ends of each frequency segment. The temperature range is generated by marking the control temperature values ​​at the two ends of each frequency segment.

[0020] As a further aspect of the present invention: the specific method for controlling the frequency of the stirrer according to the frequency-temperature comparison table is as follows:

[0021] According to the frequency-temperature comparison table, the frequency range corresponding to the required combustion temperature in the combustion furnace is obtained. The frequency of the stirrer is controlled accordingly based on the frequency range so that the frequency of the stirrer is within the frequency range corresponding to the required temperature range. When the required combustion temperature is in multiple temperature ranges, the one with the smallest frequency range is selected as the target frequency range. The combustion temperature in the combustion furnace is controlled according to the target frequency range.

[0022] The beneficial effects of this invention are:

[0023] (1) This invention obtains a frequency-temperature comparison table by analyzing historical data of the combustion furnace. By querying the frequency-temperature comparison table, the frequency range corresponding to the required temperature of the combustion furnace is obtained. The frequency of the stirrer is adjusted according to the frequency range, which can control the uniformity of coal powder distribution in the combustion furnace to a certain extent, thereby affecting the combustion temperature of the combustion furnace. The frequency of the stirrer is within the frequency range corresponding to the required temperature of the combustion furnace, thereby achieving the purpose of controlling the combustion temperature in the combustion furnace to a certain extent. The combustion temperature of the combustion furnace is kept within an optimal range to a certain extent. By controlling the combustion temperature, the energy utilization rate of pulverized coal is improved, and energy saving and efficient utilization are achieved. By adjusting the frequency of the stirrer to control the combustion temperature, the temperature is ensured to be as close as possible to the required combustion temperature range, avoiding energy loss and energy waste caused by excessively high or low temperatures.

[0024] (2) In this invention, the trend of change of combustion temperature and stirrer frequency at different frequencies is obtained by the frequency band marking of each frequency band. When the required control temperature is within the range, the stirrer frequency is adjusted accordingly based on the comparison between the real-time temperature and the control temperature. When the control temperature is not within the range, the corresponding frequency range is found according to the temperature range corresponding to the control temperature, and then the stirrer frequency is adjusted accordingly based on the frequency range, so that the real-time combustion temperature can be closer to the required combustion temperature.

[0025] (3) The present invention monitors whether the real-time temperature in the combustion furnace is within the expected temperature range and generates an abnormal signal. The abnormal signal provides an early warning of abnormalities or problems in the combustion furnace, and promptly reminds the operator or the automation system to notice the abnormal temperature and take corresponding measures to deal with it. This helps to prevent potential problems from developing further and reduces potential safety hazards and equipment damage that may occur during the combustion process. Attached Figure Description

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of a pulverized coal energy-saving combustion device and control system according to the present invention;

[0028] Figure 2 This is a schematic diagram of the system implementation steps of a pulverized coal energy-saving combustion device and control system according to the present invention;

[0029] Figure 3 This is a schematic diagram of an energy-saving pulverized coal combustion device according to the present invention. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] Please see Figures 1-2 As shown, the present invention is a pulverized coal energy-saving combustion equipment and control system, including a data collection module, a data analysis module, a frequency-temperature comparison table generation module, and a control module;

[0033] The data collection module is used to collect historical data on the combustion temperature and corresponding agitator frequency in the combustion furnace. The combustion temperature refers to the combustion temperature in the combustion furnace at different agitator frequencies.

[0034] It should be noted that in this application, it is assumed that the pulverized coal supply rate, burner adjustment and other factors affecting the combustion temperature in the combustion furnace, such as ambient temperature and burner cleanliness, are kept constant under different agitator frequencies. In other words, the combustion furnace is set to be under constant environmental conditions.

[0035] The data analysis module is used to analyze historical data on the combustion temperature and corresponding agitator frequency in the combustion furnace within a preset time T, thereby obtaining the controlled temperature values ​​of the combustion furnace at different agitator frequencies within the preset time T. The specific method for obtaining the controlled temperature values ​​of the combustion furnace at different agitator frequencies is as follows:

[0036] S1: Select one of the different frequencies of the stirrer as the analysis frequency, obtain the temperature state value of the combustion furnace at the analysis frequency within a preset time T and the corresponding temperature maintenance duration, and mark them as Wt and Ct respectively. The temperature maintenance duration refers to the duration of the corresponding state value within the preset time T, where t is the number of temperature state values, and t≥1.

[0037] S2: Obtain the temperature state values ​​that satisfy the corresponding temperature maintenance time greater than Y1 from all temperature state values, and mark them as Wn, where t≥n≥1, Y1 is a preset value and the specific value is determined by relevant staff. Remove temperature state values ​​with short maintenance time to avoid the influence of instantaneous temperature values ​​on subsequent data analysis, so that the obtained data is more representative.

[0038] S3: Through formula The calculation method obtains the temperature percentage Bn corresponding to each temperature state value Wn, where t≥n≥t1≥1. The larger the value of the temperature percentage Bn corresponding to the temperature state value, the greater the proportion of the corresponding temperature state value in the heating process of the combustion furnace within the preset time T. The larger the value of the temperature percentage Bn, the greater the proportion of the corresponding temperature state value. The ratio of the product of each temperature state value Wn and its corresponding temperature maintenance time Cn to the sum of the products of all temperature state values ​​Wn and their corresponding temperature maintenance times is used as the temperature percentage Bn corresponding to each temperature state value Wn. The temperature percentage Bn indicates the proportion of the corresponding temperature state value in the heating process of the combustion furnace within the preset time T. The larger the value of the temperature percentage Bn, the greater the proportion of the corresponding temperature state value, and vice versa.

[0039] S4: Obtain the temperature state value corresponding to the maximum value among the various temperature proportions Bn, and mark it as the control temperature value D1 corresponding to the analysis frequency;

[0040] S5: Repeat steps S1-S4 to obtain the control temperature value Di corresponding to the combustion furnace at different frequencies of the stirrer, where i represents the number of different frequencies of the stirrer and i is used as the label of the different frequencies of the stirrer, where i≥1.

[0041] S6: Bind the different frequencies of the stirrer to the corresponding temperature control values ​​Di at the different frequencies;

[0042] The frequency-temperature comparison table generation module is used to generate a coordinate system based on the different frequencies of the stirrer and the corresponding control temperature values ​​at different frequencies. Simultaneously, it generates a change curve based on the corresponding control temperature values ​​at different frequencies, and then generates a frequency-temperature comparison table based on the change curve. The specific method for generating the frequency-temperature comparison table is as follows:

[0043] S11: Use the label i of different frequencies of the stirrer as the horizontal axis and the control temperature value Di corresponding to different frequencies as the vertical axis to generate a coordinate system. Obtain the coordinate points of the control temperature value corresponding to different frequencies in the coordinate system. Take the origin of the coordinate system as the starting point and connect the coordinate points in sequence to generate the change curve.

[0044] S112: Mark each line segment on the change curve as a frequency segment. Each frequency segment represents the change of the control temperature value when the stirrer is running within a specific frequency range. Obtain the frequency values ​​corresponding to the two ends of each frequency segment and generate the frequency interval corresponding to each frequency segment. Then obtain the control temperature values ​​corresponding to the two ends of each frequency segment and generate the temperature interval corresponding to each frequency segment. Bind the frequency interval and temperature interval corresponding to each frequency segment to generate a frequency-temperature reference table.

[0045] The control module is used to obtain the frequency range corresponding to the required combustion temperature in the combustion furnace according to the frequency-temperature lookup table, and then control the frequency of the stirrer accordingly based on the frequency range, thereby achieving the purpose of controlling the combustion temperature in the combustion furnace. The specific control method is as follows:

[0046] Based on the required combustion temperature in the combustion furnace, find the corresponding temperature range in the frequency-temperature comparison table, then find the corresponding frequency range based on the temperature range, and finally adjust the frequency of the stirrer according to the corresponding frequency range so that the frequency of the stirrer is within the frequency range corresponding to the required temperature range, so as to achieve control of the combustion temperature in the combustion furnace.

[0047] When the required combustion temperature falls within multiple temperature ranges, i.e., multiple corresponding frequency ranges exist, the one with the smallest frequency range is selected as the target frequency range, and the combustion temperature in the combustion furnace is controlled according to the target frequency range.

[0048] By analyzing historical data of the combustion furnace, the temperature state values ​​of the combustion furnace at different agitator frequencies were obtained, and the temperature ratio of each temperature state value was calculated. Based on the temperature ratio of each temperature state value, the corresponding control temperature values ​​at different frequencies were generated. A change curve was generated based on the different frequencies of the agitator and the corresponding control temperature values ​​at different frequencies. A frequency-temperature reference table was generated based on the change curve. When the burner adjustment, pulverized coal supply rate, and other factors of the combustion furnace are constant, the frequency range corresponding to the required temperature of the combustion furnace can be found by querying the frequency-temperature reference table. Based on the frequency range, the frequency of the agitator is adjusted to the frequency range corresponding to the required temperature of the combustion furnace, thereby controlling the combustion temperature in the combustion furnace to a certain extent and influencing the change trend of the combustion temperature to a certain extent, so that the combustion temperature of the combustion furnace is kept within a reasonable range, avoiding the uncertainty and error caused by manual intervention.

[0049] Example 2

[0050] As a second embodiment of the present invention, please refer to Figure 1 As shown, in specific implementation, compared with Embodiment 1, the only difference between the technical solution of this embodiment and Embodiment 1 is that this embodiment also includes a frequency band marking module;

[0051] The frequency band marking module obtains the changing trend of each frequency band by calculating the slope of each frequency band on the change curve, and marks each frequency band accordingly. The frequency band marking includes temperature increase frequency band, temperature decrease frequency band and constant temperature frequency band.

[0052] The specific method for obtaining the slope corresponding to each frequency band in the coordinate system is as follows:

[0053] Obtain the coordinates of the two endpoints before and after each frequency band, and label them as (x... j-1 y j-1 ) and (x j y j ), where the larger the number j, the further back the point is in the frequency band, that is, the farther away from the origin.

[0054] Through formula Calculate the slope Lj corresponding to each frequency band, where j is the number of nodes on the curve, with the first node being the origin. Also, label the frequency band j, j≥1.

[0055] When the slope is greater than 0, it indicates that the combustion temperature in the furnace is positively correlated with the agitator frequency in the corresponding frequency range, and the corresponding frequency range is marked as the temperature increase frequency range. When the slope is less than 0, it indicates that the combustion temperature in the furnace is negatively correlated with the agitator frequency in the corresponding frequency range, and the corresponding frequency range is marked as the temperature decrease frequency range. When the slope is equal to 0, it indicates that the combustion temperature in the furnace is not correlated with the agitator frequency in the corresponding frequency range, and the corresponding frequency range is marked as the constant temperature frequency range.

[0056] By using the frequency band markings corresponding to each frequency band, we can gain a more comprehensive understanding of the relationship between temperature and agitator frequency in each frequency band of the combustion furnace.

[0057] The frequency modulation module obtains the required control temperature when the combustion temperature in the furnace needs to be adjusted, and determines whether the control temperature is within the temperature range corresponding to the agitator frequency at this time.

[0058] When the controlled temperature is within the temperature range corresponding to the stirrer frequency, the frequency band mark of the corresponding temperature range frequency segment is obtained. When the corresponding frequency band mark is a temperature increase frequency band, it indicates that the combustion temperature in the furnace is positively correlated with the stirrer frequency in the corresponding frequency band. The controlled temperature is then compared with the real-time temperature. When the controlled temperature is greater than the real-time temperature, the stirrer frequency is increased accordingly. When the controlled temperature is less than the real-time temperature, the stirrer frequency is decreased accordingly.

[0059] When the corresponding frequency band is marked as the temperature reduction band, it means that the combustion temperature in the furnace is negatively correlated with the agitator frequency in the corresponding frequency band. The controlled temperature is compared with the real-time temperature. When the controlled temperature is greater than the real-time temperature, the agitator frequency is reduced accordingly. When the controlled temperature is less than the real-time temperature, the agitator frequency is increased accordingly to approach the required combustion temperature.

[0060] When the corresponding frequency band is marked as a constant temperature frequency band or the controlled temperature is not within the temperature range corresponding to the stirrer frequency at this time, the frequency range corresponding to the temperature range corresponding to the controlled temperature is obtained, and the stirrer frequency is adjusted accordingly based on the frequency range to approach the required combustion temperature.

[0061] By calculating the slope of each frequency segment on the change curve, the trend of combustion temperature and agitator frequency at different frequencies is obtained. Each frequency segment is marked according to the trend of each frequency segment. It is then determined whether the required control temperature of the combustion furnace is within the temperature range corresponding to the current agitator frequency. If it is within the range, the relationship between combustion temperature and agitator frequency is determined according to the frequency band marking. The agitator frequency is adjusted accordingly based on the comparison between the real-time temperature and the control temperature. If the control temperature is not within the range, the corresponding frequency range is found according to the temperature range corresponding to the control temperature. The agitator frequency is then adjusted accordingly based on the frequency range. Adjusting the agitator frequency according to the relationship between the real-time temperature and the control temperature can control the uniformity of coal powder distribution in the combustion furnace to a certain extent, thereby affecting the combustion temperature of the combustion furnace and making the real-time combustion temperature closer to the required combustion temperature.

[0062] Example 3

[0063] As a third embodiment of the present invention, in specific implementation, compared with the first and second embodiments, the technical solution of this embodiment differs from the first and second embodiments only in that in this embodiment, the real-time temperature in the combustion furnace and the frequency corresponding to the stirrer are obtained, the corresponding temperature range is obtained according to the frequency corresponding to the stirrer, the real-time temperature is substituted into the temperature range to determine whether the real-time temperature belongs to the corresponding temperature range, if it belongs, no processing is performed, if it does not belong, an abnormal signal is generated.

[0064] By acquiring the real-time temperature inside the combustion furnace and the corresponding frequency of the stirrer, it is possible to monitor whether the real-time temperature inside the combustion furnace is within the expected temperature range. If the real-time temperature deviates from the expected temperature range, it may mean that there is an abnormality or problem in the combustion process, and timely measures need to be taken to adjust or repair it to ensure the normal operation and safety of the combustion process. By generating abnormal signals, operators or automated systems can be promptly alerted to abnormal temperature conditions and take corresponding measures to deal with them. This helps to prevent potential problems from developing further and reduce potential safety hazards and equipment damage that may be caused during the combustion process.

[0065] Example 4

[0066] As a fifth embodiment of the present invention, in specific implementation, the technical solution of this embodiment is to combine the solutions of the above embodiments one, two and three;

[0067] Example 5

[0068] Please refer to a pulverized coal energy-saving combustion device. Figure 3 As shown, it includes a combustion furnace, a stirrer, and a processor, as well as a computer program that can run on the processor;

[0069] A combustion furnace is a combustion device used to burn pulverized coal, and it has multiple burners.

[0070] An agitator, installed on the combustion furnace, is used to stir the pulverized coal inside the combustion furnace;

[0071] The processor is installed on the combustion furnace and electrically connected to the stirrer. It contains a computer program for processing and analyzing the data from the stirrer and controlling the frequency of the stirrer based on the analysis results.

[0072] When executed by a processor, this computer program enables the operation of a control system for a pulverized coal energy-saving combustion device.

[0073] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters and thresholds in the formulas are set by those skilled in the art according to the actual situation.

[0074] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control system for a pulverized coal energy-saving combustion device, characterized in that, include: The data collection module is used to acquire the temperature status values ​​of the combustion furnace at different frequencies of the stirrer within a preset time T and the corresponding temperature maintenance duration. The data analysis module is used to obtain the control temperature values ​​of the combustion furnace at different frequencies. Specifically, it selects one of the different frequencies of the stirrer as the analysis frequency, obtains the temperature state value and corresponding temperature maintenance duration of the combustion furnace at the analysis frequency within a preset time T, filters out the temperature state values ​​that satisfy the temperature maintenance duration being greater than a preset threshold Y1 from all temperature state values, and takes the product of each remaining temperature state value at the analysis frequency with its corresponding temperature maintenance duration as the ratio to the sum of the products of all temperature state values ​​at the analysis frequency with their corresponding temperature maintenance durations as the temperature percentage corresponding to each temperature state value at the analysis frequency; obtains the temperature state value corresponding to the maximum temperature percentage and uses it as the control temperature value corresponding to the analysis frequency. By repeating the above method, you can obtain the corresponding temperature control values ​​for the stirrer at different frequencies. The frequency-temperature comparison table generation module generates change curves based on the corresponding control temperature values ​​at different frequencies. Based on the frequency values ​​and control temperature values ​​at both ends of each frequency segment on the change curve, it generates frequency intervals and temperature intervals corresponding to each frequency segment. It then binds the frequency intervals and temperature intervals corresponding to each frequency segment to generate a frequency-temperature comparison table. The control module is used to convert the required combustion temperature of the combustion furnace into a corresponding frequency range according to the frequency-temperature conversion table, and to control the frequency of the agitator accordingly with reference to the frequency range.

2. The control system of the pulverized coal energy-saving combustion equipment according to claim 1, characterized in that, The specific method for generating change curves based on the corresponding control temperature values ​​at different frequencies is as follows: A coordinate system is generated by using the same frequency of the stirrer as the horizontal axis and the corresponding control temperature values ​​at different frequencies as the vertical axis. The coordinate points of the control temperature values ​​at different frequencies in the coordinate system are obtained. The origin of the coordinate system is used as the starting point to connect the points in the coordinate system in sequence, thereby generating a change curve.

3. The control system of the pulverized coal energy-saving combustion equipment according to claim 2, characterized in that, The specific method for generating the frequency range and temperature range corresponding to each frequency band is as follows: Each line segment on the change curve is marked as a frequency segment. The frequency value and control temperature value corresponding to the two ends of each frequency segment are obtained. The frequency range is generated by marking the frequency values ​​at the two ends of each frequency segment. The temperature range is generated by marking the control temperature values ​​at the two ends of each frequency segment.

4. The control system of the pulverized coal energy-saving combustion equipment according to claim 1, characterized in that, The specific method for controlling the frequency of the stirrer according to the frequency-temperature conversion table is as follows: According to the frequency-temperature comparison table, the frequency range corresponding to the required combustion temperature in the combustion furnace is obtained. The frequency of the stirrer is controlled accordingly based on the frequency range so that the frequency of the stirrer is within the frequency range corresponding to the required temperature range. When the required combustion temperature is in multiple temperature ranges, the one with the smallest frequency range is selected as the target frequency range. The combustion temperature in the combustion furnace is controlled according to the target frequency range.

5. The control system of the pulverized coal energy-saving combustion equipment according to claim 3, characterized in that, It also includes a frequency band marking module and a frequency modulation module; The frequency band marking module is used to obtain the slope of each frequency segment on the change curve. The change trend of each frequency segment is obtained by the slope based on the positive or negative value of the slope. The frequency segments are marked according to the positive or negative value of the slope. The frequency band marking includes temperature increase frequency band, temperature decrease frequency band and constant temperature frequency band. The frequency modulation module is used to determine whether the required temperature of the combustion furnace is within the temperature range corresponding to the current agitator frequency, and adjust the agitator frequency according to the frequency band marking. It also adjusts the agitator frequency accordingly based on the judgment result and the real-time temperature of the combustion furnace.

6. The control system of the pulverized coal energy-saving combustion equipment according to claim 5, characterized in that, The specific method for obtaining the frequency band markers corresponding to each frequency band is as follows: Obtain the coordinates of the two endpoints before and after each frequency segment on the change curve. Calculate the slope of each frequency segment using the coordinates of the two endpoints before and after each frequency segment. When the slope is greater than 0, mark the frequency segment as the temperature-increasing frequency segment. When the slope is less than 0, mark the frequency segment as the temperature-decreasing frequency segment. When the slope is equal to 0, mark the frequency segment as the constant-temperature frequency segment.

7. The control system of the pulverized coal energy-saving combustion equipment according to claim 6, characterized in that, The task of the frequency modulation module is to adjust the stirrer frequency according to the required control temperature. The specific steps are as follows: Determine if the required temperature is within the temperature range corresponding to the current stirrer frequency. If so, obtain the frequency band marker of the frequency segment corresponding to that temperature range. If the frequency band marker is a temperature increase frequency band and the controlled temperature is greater than the real-time temperature, increase the stirrer frequency; otherwise, decrease the stirrer frequency. If the frequency band marker is a temperature decrease frequency band and the controlled temperature is less than the real-time temperature, decrease the stirrer frequency; otherwise, increase the stirrer frequency. When the corresponding frequency band marker is a constant temperature frequency band or the controlled temperature is not at that time, find the corresponding frequency range according to the temperature range corresponding to the controlled temperature and adjust the frequency accordingly.

8. A pulverized coal energy-saving combustion device, characterized in that, It includes a combustion furnace, a stirrer, and a processor, as well as a computer program that can run on the processor; A combustion furnace is a combustion device used to burn pulverized coal, and it has multiple burners. An agitator, installed on the combustion furnace, is used to stir the pulverized coal inside the combustion furnace; The processor is installed on the combustion furnace and electrically connected to the stirrer. It contains a computer program for processing and analyzing the data from the stirrer and controlling the frequency of the stirrer based on the analysis results. When the computer program is executed by the processor, it enables the operation of the control system for a pulverized coal energy-saving combustion device as described in any one of claims 1-7.

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