Coal feeder control method and device, storage medium and electronic equipment

Abstract

The invention relates to a coal feeder control method and device, a storage medium and electronic equipment, the pressure difference between a coal feeder and a coal mill is dynamically adjusted by controlling the sealing air volume of the coal feeder, so that safe and stable operation of a coal pulverizing system is ensured, and the boiler efficiency is improved. The method comprises the steps that the first opening degree of a sealing air inlet control valve of the coal feeder, the second opening degree of a cold air control valve corresponding to the coal mill and the initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill are obtained; determining a control coefficient of a sealing air inlet control valve of the coal feeder according to the first opening degree, and determining a feed-forward value of the sealing air inlet control valve of the coal feeder according to the second opening degree; and according to the control coefficient, the feed-forward value and a preset pressure difference, the opening degree of a sealing air inlet control valve of the coal feeder is adjusted, so that the initial pressure difference is larger than or equal to the preset pressure difference.

Description

Technical Field

[0001] The present disclosure relates to the technical field of coal-fired power generation, and in particular to a coal feeder control method, device, storage medium and electronic equipment. Background Art

[0002] Coal-fired units usually use cold primary air as the sealing air for the coal feeder in the pulverizing system. In the operating system, the coal feeder itself is sealed reliably and can be considered leak-free. The coal feeder needs sealing air to prevent the hot air from the pulverizer from returning to the coal feeder through the discharge port.

[0003] In the related technologies, there are few means for adjusting the sealing air of the coal feeder. If the sealing air volume of the coal feeder is not properly controlled, problems such as increased boiler exhaust temperature and reduced efficiency, and insufficient ignition of the coal mill will occur, thereby affecting the safety and stability of the pulverizing system operation. Summary of the invention

[0004] The purpose of the present disclosure is to provide a coal feeder control method, device, storage medium and electronic equipment, which dynamically adjusts the pressure difference between the coal feeder and the coal mill by controlling the sealing air volume of the coal feeder, thereby ensuring the safe and stable operation of the pulverizing system and improving the boiler efficiency.

[0005] In order to achieve the above objectives, in a first aspect, the present disclosure provides a coal feeder control method, the method comprising: Obtaining a first opening of the sealing air inlet regulating valve of the coal feeder, a second opening of the corresponding cold air regulating valve of the coal mill, and an initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill; Determine a control coefficient of the sealing air inlet regulating valve of the coal feeder according to the first opening, and determine a feedforward value of the sealing air inlet regulating valve of the coal feeder according to the second opening; According to the control coefficient, the feedforward value and the preset pressure difference, the opening of the sealing air inlet regulating valve of the coal feeder is adjusted so that the initial pressure difference is greater than or equal to the preset pressure difference.

[0006] Optionally, determining the control coefficient of the sealing air inlet regulating valve of the coal feeder according to the first opening includes: According to the first opening and the preset first functional relationship, the control coefficient of the sealing air inlet regulating valve of the coal feeder is determined, wherein the preset first functional relationship is determined according to the opening of the sealing air inlet regulating valve of the coal feeder and the corresponding pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill.

[0007] Optionally, determining the feedforward value of the sealing air inlet regulating valve of the coal feeder according to the second opening includes: According to the second opening and the preset second functional relationship, the feedforward value of the sealing air inlet damper of the coal feeder is determined, wherein the preset second functional relationship is determined according to the opening of the cold air damper of the coal mill and the corresponding response time of the sealing air inlet damper of the coal feeder.

[0008] Optionally, adjusting the opening of the sealing air inlet regulating valve of the coal feeder according to the control coefficient, the feedforward value and the preset pressure difference includes: Determine the proportional coefficient corresponding to the control coefficient by using a PID control algorithm, and superimpose the feedforward value with the control amount of the sealing air inlet regulating valve of the coal feeder to obtain a target control amount; According to the proportional coefficient and the target control amount, the opening of the sealing air inlet regulating valve of the coal feeder is adjusted so that the initial pressure difference is greater than or equal to the preset pressure difference.

[0009] Optionally, the method further comprises: Before obtaining the first opening of the sealing air inlet regulating valve of the coal feeder, the second opening of the corresponding cold air regulating valve of the coal mill, and the initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill, it is determined that the coal feeder is in a coal-out state.

[0010] In a second aspect, the present disclosure further provides a coal feeder control device, the device comprising: An acquisition module, used to acquire a first opening of the sealing air inlet regulating valve of the coal feeder, a second opening of the cold air regulating valve of the corresponding coal mill, and an initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill; a determination module, configured to determine a control coefficient of a sealing air inlet regulating valve of the coal feeder according to the first opening, and to determine a feedforward value of the sealing air inlet regulating valve of the coal feeder according to the second opening; The adjustment module is used to adjust the opening of the sealing air inlet regulating valve of the coal feeder according to the control coefficient, the feedforward value and the preset pressure difference, so that the initial pressure difference is greater than or equal to the preset pressure difference.

[0011] Optionally, the determining module is used to: According to the first opening and the preset first functional relationship, the control coefficient of the sealing air inlet regulating valve of the coal feeder is determined, wherein the preset first functional relationship is determined according to the opening of the sealing air inlet regulating valve of the coal feeder and the corresponding pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill.

[0012] Optionally, the determining module is used to: According to the second opening and the preset second functional relationship, the feedforward value of the sealing air inlet damper of the coal feeder is determined, wherein the preset second functional relationship is determined according to the opening of the cold air damper of the coal mill and the corresponding response time of the sealing air inlet damper of the coal feeder.

[0013] Optionally, the adjustment module is used to: Determine the proportional coefficient corresponding to the control coefficient by using a PID control algorithm, and superimpose the feedforward value with the control amount of the sealing air inlet regulating valve of the coal feeder to obtain a target control amount; According to the proportional coefficient and the target control amount, the opening of the sealing air inlet regulating valve of the coal feeder is adjusted so that the initial pressure difference is greater than or equal to the preset pressure difference.

[0014] Optionally, the device further comprises a state module, configured to: Before obtaining the first opening of the sealing air inlet regulating valve of the coal feeder, the second opening of the corresponding cold air regulating valve of the coal mill, and the initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill, it is determined that the coal feeder is in a coal-out state.

[0015] In a third aspect, the present disclosure further provides a non-temporary computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the methods described in the first aspect.

[0016] In a fourth aspect, the present disclosure further provides an electronic device, including: a memory having a computer program stored thereon; A processor is used to execute the computer program in the memory to implement the steps of any one of the methods in the first aspect.

[0017] By adopting the above technical solution, at least the following beneficial technical effects can be achieved: According to the opening of the sealing air inlet regulating valve of the coal feeder and the opening of the cold air regulating valve of the corresponding coal mill, the control coefficient and feedforward value of the sealing air inlet regulating valve of the coal feeder are determined, and then the opening of the sealing air inlet regulating valve of the coal feeder is adjusted according to the control coefficient, feedforward value and preset pressure difference, so that the pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill is greater than or equal to the preset pressure difference, thereby ensuring the safe and stable operation of the pulverizing system and improving the boiler efficiency.

[0018] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 The figure is a flow chart of a coal feeder control method according to an exemplary embodiment of the present disclosure.

[0020] Figure 2 The figure is a flow chart of a coal feeder control method according to another exemplary embodiment of the present disclosure.

[0021] Figure 3 It is a block diagram of a coal feeder control device according to an exemplary embodiment of the present disclosure.

[0022] Figure 4 It is a block diagram of an electronic device according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0024] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the device is located and with the authorization given by the owner of the corresponding device.

[0025] As mentioned in the background technology, in the related technology, there are few means for adjusting the sealing wind of the coal feeder. If the air volume of the sealing wind of the coal feeder is not reasonably controlled, for example, excessive sealing wind will lead to energy waste, and the coal particles will be blown off the tape, thereby reducing the weighing accuracy and increasing the load of the cleaning scraper. Excessive sealing air volume is also prone to dust and fog in the observation hole, which is not conducive to observation. In addition, too much cold air from the coal feeder enters the furnace, resulting in an increase in the boiler exhaust temperature, a decrease in boiler efficiency, and other problems, and may cause insufficient ignition of the coal mill, further affecting the safety and stability of the boiler operation.

[0026] In view of this, the embodiments of the present disclosure provide a coal feeder control method, device, storage medium and electronic device, which dynamically adjust the pressure difference between the coal feeder and the coal mill by controlling the sealing air volume of the coal feeder, thereby ensuring the safe and stable operation of the pulverizing system and improving the boiler efficiency.

[0027] Figure 1 FIG. 1 is a flow chart of a coal feeder control method according to an exemplary embodiment of the present disclosure. Figure 1 , the method comprises the following steps: Step S101, obtaining the first opening of the sealing air inlet damper of the coal feeder, the second opening of the corresponding cold air damper of the coal mill, and the initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill.

[0028] It should be understood that, according to actual conditions, a position sensor can be used to measure the opening value of the throttle, which is not limited in the embodiments of the present disclosure.

[0029] It should also be understood that a differential pressure transmitter may be installed at the sealing air inlet of the coal feeder and inside the corresponding coal mill to measure the pressure difference between the sealing air inlet of the coal feeder and the coal mill body.

[0030] For example, the measuring point at the sealed air inlet of the coal feeder can be installed 300mm after the adjuster, and the measuring point of the coal mill can be installed near the coal drop pipe of the coal feeder.

[0031] Step S102, determining the control coefficient of the sealing air inlet regulating valve of the coal feeder according to the first opening, and determining the feedforward value of the sealing air inlet regulating valve of the coal feeder according to the second opening.

[0032] Step S103, adjusting the opening of the sealing air inlet damper of the coal feeder according to the control coefficient, the feedforward value and the preset pressure difference, so that the initial pressure difference is greater than or equal to the preset pressure difference.

[0033] It should be understood that different manufacturers set different pressure difference values ​​between the sealing air pressure of the coal feeder and the internal pressure of the coal mill. The larger the opening of the sealing air inlet damper of the coal feeder, the greater the pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill, and vice versa. When the pressure difference is too small, it will affect the safe operation of the coal feeder. Therefore, the pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill needs to be controlled within a range greater than or equal to the safe pressure difference value.

[0034] It should also be understood that an electric regulator can be installed on the coal feeder sealed air inlet pipeline as a regulating device. The electric regulator is a device that changes the opening of a valve or a regulating valve through an electric drive device to control the flow of the medium. By installing an electric regulator on the coal feeder sealed air inlet pipeline, the amount of sealed air can be adjusted by controlling the opening and closing degree of the electric regulator.

[0035] It should also be understood that, when the opening of the cold air damper of the coal mill becomes larger and the pressure difference between the coal feeder sealing air and the coal mill becomes smaller, in order to ensure a rapid response to the control of the coal feeder sealing air inlet damper, the present disclosure sets a feedforward value in the control process of the coal feeder sealing air inlet damper. In this way, the coal feeder sealing air inlet damper can determine whether it needs to respond in advance according to the feedforward value, wherein the feedforward value of the inlet damper can be determined according to the opening value of the cold air damper and the response speed of the inlet damper.

[0036] For example, the preset pressure difference between the sealing air pressure of the coal feeder and the pressure inside the coal mill can be set at 1.5 kPa. That is to say, the pressure difference between the sealing air pressure of the coal feeder and the pressure inside the coal mill can be controlled to be above 1.5 kPa according to the value of the control coefficient and the feedforward value. The preset pressure difference value can be determined according to different types of powder making systems, and the embodiments of the present disclosure are not limited to this.

[0037] Through the above method, the control coefficient and feedforward value of the sealing air inlet regulating valve of the coal feeder can be determined according to the sealing air inlet regulating valve opening of the coal feeder and the cold air regulating valve opening of the corresponding coal mill, and then the opening of the sealing air inlet regulating valve of the coal feeder can be adjusted according to the control coefficient, feedforward value and preset pressure difference, so that the pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill is greater than or equal to the preset pressure difference, thereby ensuring the safe and stable operation of the pulverizing system and improving the boiler efficiency.

[0038] In order to enable those skilled in the art to better understand the coal feeder control method in the above embodiment of the present disclosure, the above steps are illustrated below.

[0039] In a possible manner, the control coefficient of the sealing air inlet regulating valve of the coal feeder is determined according to the first opening, which can be: According to the first opening and the preset first functional relationship, the control coefficient of the sealing air inlet regulating valve of the coal feeder is determined, wherein the preset first functional relationship is determined based on the opening of the sealing air inlet regulating valve of the coal feeder and the corresponding pressure difference between the sealing air pressure of the coal feeder and the pressure inside the coal mill.

[0040] It should be understood that the preset first functional relationship is used to represent the functional relationship between the first opening value and the control coefficient.

[0041] For example, the preset first functional relationship may be as shown in Table 1. For example, the preset first functional relationship may be obtained by collecting and analyzing relevant measured data through experimental tests according to actual conditions, and the embodiments of the present disclosure are not limited to this.

[0042]

[0043] Table 1 Through the above method, the control coefficient of the sealing air inlet damper of the coal feeder is determined according to the preset functional relationship, which can better meet the characteristics and requirements of the control system and help improve the control accuracy and stability of the system.

[0044] In a possible manner, the feedforward value of the sealing air inlet regulating valve of the coal feeder is determined according to the second opening, which can be: According to the second opening and the preset second functional relationship, the feedforward value of the sealing air inlet damper of the coal feeder is determined, wherein the preset second functional relationship is determined based on the opening of the cold air damper of the coal mill and the corresponding response time of the sealing air inlet damper of the coal feeder.

[0045] It should be understood that the preset second function value is used to represent the functional relationship between the second opening value and the feedforward value of the sealing air inlet damper of the coal feeder.

[0046] For example, the preset second functional relationship may be as shown in Table 2 below. For example, the preset second functional relationship may be obtained by collecting and analyzing relevant measured data through experimental testing according to actual conditions, and the embodiments of the present disclosure are not limited to this.

[0047]

[0048] Table 2 Through the above method, the feedforward value of the coal feeder sealing air inlet damper is determined according to the preset functional relationship, and the airflow can be further adjusted on the basis of considering the opening of the cold air damper to achieve more accurate pressure difference regulation and control.

[0049] In one possible manner, the opening of the sealing air inlet regulating valve of the coal feeder is adjusted according to the control coefficient, the feedforward value and the preset pressure difference, which can be: Determine the proportional coefficient corresponding to the control coefficient by using a PID control algorithm, and superimpose the feedforward value with the control amount of the sealing air inlet regulating valve of the coal feeder to obtain a target control amount; According to the proportional coefficient and the target control amount, the opening of the sealing air inlet regulating valve of the coal feeder is adjusted so that the initial pressure difference is greater than or equal to the preset pressure difference.

[0050] It should be understood that in the PID control algorithm, the proportional coefficient is a parameter used to adjust the response speed of the control quantity and the degree of influence of the amplified input error. For example, the corresponding proportional coefficient can be obtained by testing and optimizing according to the control coefficient of the characteristics of the control system to achieve rapid adjustment and precise control.

[0051] In the above manner, the PID control algorithm and the superimposed feedforward value can be used to provide a fast and expected adjustment of the coal feeder sealing air inlet valve to maintain the stability and control accuracy of the system, thereby controlling the coal feeder sealing air volume within a reasonable range.

[0052] In one possible embodiment, the method further includes: Before obtaining the first opening of the sealing air inlet damper of the coal feeder, the second opening of the corresponding cold air damper of the coal mill, and the initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill, it is determined that the coal feeder is in a coal-off state.

[0053] It should be understood that, at any time when the coal mill is in the process of coal mill being cut off from coal, an instruction for instructing to obtain the first opening value of the sealing air inlet regulating valve of the coal feeder, the second opening value of the cold air regulating valve of the coal mill, and the initial pressure difference value between the sealing air pressure of the coal feeder and the internal pressure of the coal mill can be issued. The above instruction can also be issued after the coal feeder is completely cut off from coal, which is not limited in the embodiments of the present disclosure.

[0054] By obtaining the relevant parameters of the coal feeder in the coal-out state in the above manner, the accuracy of the measurement data and the reliability of the parameter control can be improved according to the actual working conditions.

[0055] Figure 2 is a flow chart of a coal feeder control method according to another exemplary embodiment. Figure 2 As shown, the method includes: Step 201, determining that the boiler unit is in a state where the coal feeder is out of coal.

[0056] Step 202, obtaining a first opening of the sealing air inlet regulating valve of the coal feeder, a second opening of the cold air regulating valve of the corresponding coal mill, and an initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill.

[0057] Step 203, determining a control coefficient of the sealing air inlet regulating valve of the coal feeder according to the first opening and a preset first functional relationship.

[0058] Step 204, determining a feedforward value of the sealing air inlet regulating valve of the coal feeder according to the second opening and a preset second functional relationship.

[0059] Step 205, determining the proportional coefficient of the PID control module according to the value of the control coefficient.

[0060] Step 206, adding the feedforward value to the current valve control value of the coal feeder.

[0061] Step 207, adjusting the coal feeder sealing air inlet regulating valve according to the proportional coefficient and the superimposed regulating valve control amount, so as to adjust the pressure difference between the coal feeder sealing air and the coal mill to the target pressure difference.

[0062] Through the above method, the control coefficient and feedforward value of the sealing air inlet regulating valve of the coal feeder can be determined according to the sealing air inlet regulating valve opening of the coal feeder and the cold air regulating valve opening of the corresponding coal mill, and then the opening of the sealing air inlet regulating valve of the coal feeder can be adjusted according to the control coefficient, feedforward value and preset pressure difference, so that the pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill is greater than or equal to the preset pressure difference, thereby ensuring the safe and stable operation of the pulverizing system and improving the boiler efficiency.

[0063] Figure 3is a block diagram of a coal feeder sealing air control device 300 according to an exemplary embodiment. Figure 3 The coal feeder sealing air control device 300 comprises: The acquisition module 301 is used to acquire the first opening of the sealing air inlet regulating valve of the coal feeder, the second opening of the cold air regulating valve of the corresponding coal mill, and the initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill; A determination module 302, for determining a control coefficient of a sealing air inlet regulating valve of a coal feeder according to a first opening, and determining a feedforward value of the sealing air inlet regulating valve of a coal feeder according to a second opening; The adjustment module 303 is used to adjust the opening of the sealing air inlet regulating valve of the coal feeder according to the control coefficient, the feedforward value and the preset pressure difference, so that the initial pressure difference is greater than or equal to the preset pressure difference.

[0064] Through the above-mentioned device, the control coefficient and feedforward value of the sealing air inlet regulating valve of the coal feeder can be determined according to the opening of the sealing air inlet regulating valve of the coal feeder and the opening of the cold air regulating valve of the corresponding coal mill. Then, the opening of the sealing air inlet regulating valve of the coal feeder can be adjusted according to the control coefficient, the feedforward value and the preset pressure difference, so that the pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill is greater than or equal to the preset pressure difference, thereby ensuring the safe and stable operation of the pulverizing system and improving the boiler efficiency.

[0065] Optionally, the determining module 301 is used to: According to the first opening and the preset first functional relationship, the control coefficient of the sealing air inlet regulating valve of the coal feeder is determined, wherein the preset first functional relationship is determined based on the opening of the sealing air inlet regulating valve of the coal feeder and the pressure difference between the corresponding sealing air pressure of the coal feeder and the pressure inside the coal mill.

[0066] Optionally, the determining module 301 is used to: According to the second opening and the preset second functional relationship, the feedforward value of the sealing air inlet damper of the coal feeder is determined, wherein the preset second functional relationship is determined based on the opening of the cold air damper of the coal mill and the corresponding response time of the sealing air inlet damper of the coal feeder.

[0067] Optionally, the adjustment module 303 is used to: The proportional coefficient corresponding to the control coefficient is determined by the PID control algorithm, and the feedforward value is superimposed on the control amount of the sealing air inlet regulating valve of the coal feeder to obtain the target control amount; According to the proportional coefficient and the target control amount, adjust the opening of the coal feeder sealing air inlet regulating valve so that the initial pressure difference is greater than or equal to the preset pressure difference.

[0068] Optionally, the device further comprises a state module, configured to: Before obtaining the first opening of the sealing air inlet damper of the coal feeder, the second opening of the corresponding cold air damper of the coal mill, and the initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill, it is determined that the coal feeder is in a coal-off state.

[0069] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0070] Figure 4 FIG. 4 is a block diagram of an electronic device 400 according to an exemplary embodiment. Figure 4 As shown, the electronic device 400 may include: a processor 401 , a memory 402 . The electronic device 400 may also include one or more of a multimedia component 403 , an input / output (I / O) interface 404 , and a communication component 405 .

[0071] The processor 401 is used to control the overall operation of the electronic device 400 to complete all or part of the steps in the above-mentioned coal feeder control method. The memory 402 is used to store various types of data to support the operation of the electronic device 400. For example, these data may include instructions for any application or method used to operate on the electronic device 400, and application-related data, such as contact data, messages sent and received, pictures, audio, video, etc. The memory 402 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 403 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 402 or sent through the communication component 405. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 404 provides an interface between the processor 401 and other interface modules, and the other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 405 is used for wired or wireless communication between the electronic device 400 and other electronic devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 405 may include: Wi-Fi module, Bluetooth module, NFC module, etc.

[0072] In an exemplary embodiment, the electronic device 400 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned coal feeder control method.

[0073] In another exemplary embodiment, a computer-readable medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned coal feeder control method are implemented. For example, the computer-readable medium can be the above-mentioned memory 402 including program instructions, and the above-mentioned program instructions can be executed by the processor 401 of the electronic device 400 to complete the above-mentioned coal feeder control method.

[0074] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device, and the computer program has a code portion for executing the above-mentioned coal feeder control method when executed by the programmable device.

[0075] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0076] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0077] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A coal feeder control method, characterized in that: The method comprises: Obtaining a first opening of the sealing air inlet regulating valve of the coal feeder, a second opening of the corresponding cold air regulating valve of the coal mill, and an initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill; Determine a control coefficient of the sealing air inlet regulating valve of the coal feeder according to the first opening, and determine a feedforward value of the sealing air inlet regulating valve of the coal feeder according to the second opening; According to the control coefficient, the feedforward value and the preset pressure difference, the opening of the sealing air inlet regulating valve of the coal feeder is adjusted so that the initial pressure difference is greater than or equal to the preset pressure difference.

2. The method according to claim 1, characterized in that The step of determining the control coefficient of the sealing air inlet regulating valve of the coal feeder according to the first opening comprises: According to the first opening and the preset first functional relationship, the control coefficient of the sealing air inlet regulating valve of the coal feeder is determined, wherein the preset first functional relationship is determined according to the opening of the sealing air inlet regulating valve of the coal feeder and the corresponding pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill.

3. The method according to claim 1 or 2, characterized in that: The step of determining the feedforward value of the sealing air inlet regulating valve of the coal feeder according to the second opening comprises: According to the second opening and the preset second functional relationship, the feedforward value of the sealing air inlet damper of the coal feeder is determined, wherein the preset second functional relationship is determined according to the opening of the cold air damper of the coal mill and the corresponding response time of the sealing air inlet damper of the coal feeder.

4. The method according to claim 1, characterized in that: The step of adjusting the opening of the sealing air inlet regulating valve of the coal feeder according to the control coefficient, the feedforward value and the preset pressure difference comprises: Determine the proportional coefficient corresponding to the control coefficient by using a PID control algorithm, and superimpose the feedforward value with the control amount of the sealing air inlet regulating valve of the coal feeder to obtain a target control amount; According to the proportional coefficient and the target control amount, the opening of the sealing air inlet regulating valve of the coal feeder is adjusted so that the initial pressure difference is greater than or equal to the preset pressure difference.

5. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: Before obtaining the first opening of the sealing air inlet regulating valve of the coal feeder, the second opening of the corresponding cold air regulating valve of the coal mill, and the initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill, it is determined that the coal feeder is in a coal-out state.

6. A coal feeder control device, characterized in that: The device comprises: An acquisition module, used to acquire a first opening of the sealing air inlet regulating valve of the coal feeder, a second opening of the cold air regulating valve of the corresponding coal mill, and an initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill; a determination module, configured to determine a control coefficient of a sealing air inlet regulating valve of the coal feeder according to the first opening, and to determine a feedforward value of the sealing air inlet regulating valve of the coal feeder according to the second opening; The adjustment module is used to adjust the opening of the sealing air inlet regulating valve of the coal feeder according to the control coefficient, the feedforward value and the preset pressure difference, so that the initial pressure difference is greater than or equal to the preset pressure difference.

7. The device according to claim 6, characterized in that The determination module is used for: According to the first opening and the preset first functional relationship, the control coefficient of the sealing air inlet regulating valve of the coal feeder is determined, wherein the preset first functional relationship is determined according to the opening of the sealing air inlet regulating valve of the coal feeder and the corresponding pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill.

8. The device according to claim 6 or 7, characterized in that The determination module is used for: According to the second opening and the preset second functional relationship, the feedforward value of the sealing air inlet damper of the coal feeder is determined, wherein the preset second functional relationship is determined according to the opening of the cold air damper of the coal mill and the corresponding response time of the sealing air inlet damper of the coal feeder.

9. The device according to claim 6, characterized in that The adjustment module is used for: Determine the proportional coefficient corresponding to the control coefficient by using a PID control algorithm, and superimpose the feedforward value with the control amount of the sealing air inlet regulating valve of the coal feeder to obtain a target control amount; According to the proportional coefficient and the target control amount, the opening of the sealing air inlet regulating valve of the coal feeder is adjusted so that the initial pressure difference is greater than or equal to the preset pressure difference.

10. The device according to any one of claims 6 to 9, characterized in that: The device also includes a state module, configured to: Before obtaining the first opening of the sealing air inlet regulating valve of the coal feeder, the second opening of the corresponding cold air regulating valve of the coal mill, and the initial pressure difference between the sealing air pressure of the coal feeder and the internal pressure of the coal mill, it is determined that the coal feeder is in a coal-out state.

11. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method described in any one of claims 1 to 5 are implemented.

12. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 5.

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