Precise dust removal method and system for air pre-heater, electronic equipment and storage medium

Abstract

The invention discloses a precise dust removal method and system for an air pre-heater, electronic equipment and a storage medium, and the method comprises the steps: carrying out the regional division of the cross section of the air pre-heater according to the circumferential division and radial division modes of the air pre-heater; based on the image information of the heat exchange element in the air pre-heater, the dust deposition degree of each divided area is determined; when the dust deposition degree of any divided area is larger than a preset dust blowing threshold value, a dust blower is controlled to blow dust to the area, and after directional dust blowing of preset times is completed on the area, if the dust deposition degree of the area is still larger than the preset dust blowing threshold value, an air pre-heater is controlled to start a rotating speed adjusting dust removal mode; and when it is monitored that the dust deposition degree of the divided area is lower than a preset dust blowing threshold value, the air pre-heater is controlled to exit the rotating speed adjustment dust removal mode. The problems that in an existing timing and fixed-frequency soot blowing mode, accumulated soot cleaning is not timely, over-frequency soot blowing steam loss is large, and heat exchange elements are damaged can be solved, and the accurate, efficient and energy-saving soot cleaning effect of the air pre-heater is achieved.

Description

Technical Field

[0001] This invention relates to the field of energy conservation and consumption reduction technology in thermal power generation, and in particular to a method, system, electronic device and storage medium for precise ash removal of air preheaters. Background Technology

[0002] After introducing SCR (Selective Catalytic Reduction) denitrification systems, thermal power plants face a new challenge: air preheater clogging. During SCR operation, unconsumed ammonia escapes and reacts with sulfur trioxide in the flue gas to form viscous ammonium bisulfate (ABS). This ABS easily adheres to the surface of the air preheater's heat exchange elements, adsorbing fly ash and exacerbating clogging. Currently, power plants commonly use timed and frequencyd soot blowing to address this issue, but this method has significant drawbacks. Power plants burning low-sulfur coal require 3-4 soot blows per day, while high-sulfur coal power plants require 6-8. Timed soot blowing cannot promptly remove accumulated ash, leading to increased air preheater resistance and higher power consumption in the flue gas system; conversely, excessive soot blowing wastes steam and damages heat exchange elements. Traditional methods lack dynamic sensing of ash accumulation and clogging levels, making precise soot blowing difficult and often resulting in ineffective or excessive soot blowing operations.

[0003] Therefore, there is an urgent need to provide a technical solution to address the above problems. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a method, system, electronic device, and storage medium for precise dust removal in air preheaters.

[0005] In a first aspect, the present invention provides a method for precise dust removal in an air preheater, the technical solution of which is as follows: The cross-section of the air preheater is divided into regions according to the circumferential and radial division methods, resulting in multiple division regions. Based on the image information of the heat exchange elements inside the air preheater, the degree of ash accumulation in each divided region is determined; When the dust accumulation in any segmented area exceeds a preset soot blowing threshold, the soot blower is controlled to perform directional soot blowing on the segmented area. After performing a preset number of directional soot blowing operations on the segmented area, if the dust accumulation in the segmented area still exceeds the preset soot blowing threshold, the air preheater is controlled to start a speed adjustment cleaning mode. The speed adjustment cleaning mode is as follows: the air preheater is controlled to increase its speed to a target speed so that the segmented area can quickly pass through the primary air chamber and the secondary air chamber, and when the segmented area enters the flue gas chamber, the air preheater is controlled to return to normal speed operation. During the operation of the air preheater in the speed adjustment cleaning mode, when the dust accumulation level in any of the divided areas is detected to be lower than the preset dust blowing threshold, the air preheater is controlled to exit the speed adjustment cleaning mode.

[0006] The beneficial effects of the precise dust removal method for air preheaters of the present invention are as follows: The method of the present invention can effectively solve the problems of untimely cleaning of ash accumulation, large steam loss due to excessive soot blowing, and damage to heat exchange elements in the existing timed and frequency soot blowing method, and achieve precise, efficient and energy-saving soot cleaning effect of air preheater.

[0007] Based on the above scheme, the air preheater precision cleaning method of the present invention can be further improved as follows.

[0008] In one alternative approach, the cross-section of the air preheater is divided into regions according to both circumferential and radial divisions to obtain multiple divided regions, including: Along the circumference of the air preheater, the cross-section of the air preheater is uniformly divided into multiple sector-shaped regions; and along the radial direction of the air preheater, the cross-section of the air preheater is sequentially divided into multiple annular regions from the inside out. The intersection of all sector regions and all annular regions forms the multiple partitioned regions.

[0009] In one alternative approach, the step of determining the degree of ash accumulation in each divided region based on image information of the heat exchange elements inside the air preheater includes: The image information of the heat exchange element is acquired by a high-temperature resistant camera device installed inside the air preheater; Using intelligent image processing algorithms, the region images corresponding to each segmented region in the image information are analyzed and processed to determine the degree of dust accumulation in each segmented region.

[0010] In one alternative approach, it also includes: When the soot blower is controlled to perform directional soot blowing on any of the divided areas for a first preset time, it is determined that the soot blower has completed one directional soot blowing operation on any of the divided areas.

[0011] In one alternative approach, the step of controlling the air preheater to exit the speed adjustment cleaning mode when the dust accumulation level in any of the divided areas is detected to be lower than the preset soot blowing threshold includes: When the dust accumulation level in any of the divided areas is detected to be lower than the preset dust blowing threshold, the air preheater is controlled to exit the speed adjustment dust cleaning mode after a second preset time interval.

[0012] In one alternative approach, after controlling the air preheater to exit the speed adjustment cleaning mode, the method further includes: Control the soot blower to stop directional soot blowing on any of the defined areas.

[0013] In one alternative approach, it also includes: When the dust accumulation level in any divided area exceeds the preset dust removal threshold, an alarm message is output for that divided area.

[0014] Secondly, this invention provides a precision dust removal system for air preheaters, the technical solution of which is as follows: It includes: a region division module, a dust accumulation detection module, a first control module, and a second control module; The region division module is used to divide the cross-section of the air preheater into multiple regions according to the method of dividing along the circumference and radial direction of the air preheater. The ash accumulation detection module is used to: determine the degree of ash accumulation in each divided area based on image information of the heat exchange elements inside the air preheater; The first control module is configured to: when the degree of ash accumulation in any divided area is greater than a preset soot blowing threshold, control the soot blower to perform directional soot blowing on the any divided area; after completing a preset number of directional soot blowing operations on the any divided area, if the degree of ash accumulation in the any divided area is still greater than the preset soot blowing threshold, control the air preheater to start a speed adjustment cleaning mode; wherein, the speed adjustment cleaning mode is configured to: control the air preheater to increase its speed to a target speed so that the any divided area can quickly pass through the primary air chamber and the secondary air chamber, and when the any divided area enters the flue gas chamber, control the air preheater to return to normal speed operation; The second control module is used to: when the air preheater is in the speed adjustment cleaning mode, and the dust accumulation level in any of the divided areas is detected to be lower than the preset dust blowing threshold, control the air preheater to exit the speed adjustment cleaning mode.

[0015] The beneficial effects of the air preheater precision cleaning system of the present invention are as follows: The system of the present invention can effectively solve the problems of untimely cleaning of ash accumulation, large steam loss due to excessive soot blowing, and damage to heat exchange elements in the existing timed and frequency soot blowing method, and achieve precise, efficient and energy-saving soot cleaning effect of air preheater.

[0016] Thirdly, the technical solution of an electronic device according to the present invention is as follows: It includes a memory, a processor, and a program stored in the memory and running on the processor, wherein the processor executes the program to implement the steps of the air preheater precision cleaning method of the present invention.

[0017] Fourthly, the technical solution of a computer-readable storage medium provided by the present invention is as follows: The computer-readable storage medium stores instructions that, when read, cause the computer-readable storage medium to perform the steps of the air preheater precision cleaning method of the present invention.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0019] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic flowchart of an embodiment of a precise dust removal method for an air preheater according to the present invention; Figure 2 A schematic diagram showing the division of the cross-section of the air preheater; Figure 3 This is a schematic diagram of an embodiment of the air preheater precision cleaning system of the present invention; Figure 4 This is a schematic diagram of an embodiment of an electronic device according to the present invention. Detailed Implementation

[0020] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0021] Figure 1 This diagram illustrates a flowchart of an embodiment of a precise air preheater cleaning method provided by the present invention. This precise air preheater cleaning method can be executed by electronic devices such as terminal devices or servers. The terminal device can be any fixed or mobile terminal, such as user equipment (UE), mobile device, user terminal, terminal, cellular phone, cordless phone, personal digital assistant (PDA), handheld device, computing device, vehicle-mounted device, or wearable device. The server can be a single server or a server cluster consisting of multiple servers. Any electronic device can implement the precise air preheater cleaning method by having its processor call computer-readable instructions stored in its memory. Figure 1 As shown, it includes the following steps: S1. The cross-section of the air preheater is divided into regions according to the method of dividing along the circumference and radial direction of the air preheater, resulting in multiple divided regions.

[0022] In this context, an air preheater refers to a heat exchange device in the boiler tail flue that uses the heat from flue gas to heat the air needed for combustion; for example, a rotary air preheater in a thermal power plant, which has rotating heat exchange elements inside to continuously transfer heat. Circumferential division refers to the circumferential division around the central axis of the air preheater rotor; for example, dividing the 360° circumference of the air preheater cross-section evenly into 36 10° sector sections. Radial division refers to the division radiating outwards along the central axis of the air preheater rotor; for example, dividing the air preheater cross-section from the center outwards into seven annular zones: A, B, C, D, E, F, and G. A cross-section refers to a section perpendicular to the central axis of the air preheater rotor; for example, a section perpendicular to the air preheater rotor axis showing the layout of the flue gas chamber, primary air chamber, and secondary air chamber, as well as the distribution of heat exchange elements. A divided region refers to an independent unit formed by dividing the air preheater cross-section circumferentially and radially.

[0023] S2. Based on the image information of the heat exchange elements inside the air preheater, determine the degree of ash accumulation in each divided area.

[0024] Here, heat exchange elements refer to the metal components inside the air preheater used for heat exchange; for example, the corrugated metal plate assemblies placed in the air preheater rotor compartment that are prone to dust accumulation. Image information refers to visual data reflecting the surface condition of the heat exchange elements inside the air preheater, acquired through an image acquisition device; for example, a grayscale image of the heat exchange element surface taken by a high-temperature resistant camera, which can show the dust accumulation coverage. Dust accumulation degree refers to a quantitative indicator characterizing the severity of dust and scale deposition on the surface of the heat exchange elements; for example, the percentage of dust-covered area or the estimated dust and scale thickness calculated by analyzing the image of region B2 using an image processing algorithm.

[0025] S3. When the dust accumulation in any divided area is greater than the preset dust blowing threshold, control the dust blower to perform directional dust blowing on the any divided area. After completing the directional dust blowing of the any divided area a preset number of times, if the dust accumulation in the any divided area is still greater than the preset dust blowing threshold, control the air preheater to start the rotation speed and adjust the dust cleaning mode.

[0026] The speed adjustment cleaning mode is as follows: the air preheater is controlled to increase its speed to the target speed so that any divided area can quickly pass through the primary air chamber and the secondary air chamber, and when any divided area enters the flue gas chamber, the air preheater is controlled to return to normal speed.

[0027] The preset dust-blowing threshold refers to a pre-set critical value for the degree of dust accumulation used to trigger the dust-blowing operation; for example, the preset dust-blowing threshold is reached when the dust-covered area reaches 15% of the total area of ​​the region. Directional dust-blowing refers to a precise blowing operation performed by the dust blower on a specific identified dust-accumulated area; for example, when the dust accumulation in area B2 exceeds the limit, the dust blower nozzle is controlled to blow dust from area B2 without blowing other clean areas. The preset number of attempts refers to the maximum number of directional dust-blowing attempts allowed on the same dust-accumulated area before activating the speed adjustment mode; for example, if the preset number of attempts is set to 2, then after a maximum of 2 directional dust-blowing attempts on area B2, if the dust accumulation still exceeds the limit, the speed adjustment cleaning mode is activated. The speed-adjustable ash removal mode refers to an operating method that adjusts the air preheater speed to assist in removing stubborn ash deposits. For example, if zone B2 remains clogged after soot blowing, the air preheater is accelerated to 5 r / min when zone B2 passes through the primary and secondary air chambers to ensure rapid heating. When zone B2 enters the flue gas chamber, the speed returns to the normal 1 r / min. The target speed refers to the higher operating speed the air preheater needs to achieve at a specific stage in the speed-adjustable ash removal mode. For example, in this mode, a speed value within the range of 3 to 8 r / min, such as 5 r / min, is set to ensure the ash-accumulated area passes quickly through the primary and secondary air chambers. The primary air chamber refers to the passage area in the air preheater used to transport and heat primary air; for example, the chamber in the cross-section of the air preheater used to circulate and heat the primary air sent to the pulverizing system. The secondary air chamber refers to the passage area in the air preheater used to transport and heat secondary air; for example, the chamber in the cross-section of the air preheater used to circulate and heat the secondary air directly sent to the furnace for combustion. The flue gas chamber refers to the passage area in the air preheater through which boiler exhaust gas flows; for example, the compartment in the cross-section of the air preheater through which boiler flue gas containing substances such as fly ash and ammonium bisulfate flows. Normal operating speed refers to the stable operating speed of the air preheater under normal operating conditions; for example, the operating speed of approximately 1 r / min maintained by the air preheater when no special ash cleaning mode is activated.

[0028] S4. During the operation of the air preheater in the speed adjustment cleaning mode, when the dust accumulation level in any of the divided areas is detected to be lower than the preset dust blowing threshold, the air preheater is controlled to exit the speed adjustment cleaning mode.

[0029] The technical solution of this embodiment can effectively solve the problems of untimely ash removal, large steam loss due to excessive soot blowing, and damage to heat exchange elements in the existing timed and frequency soot blowing method, and achieve precise, efficient and energy-saving ash removal effect of air preheater.

[0030] In one alternative approach, S1 includes: Along the circumference of the air preheater, the cross-section of the air preheater is uniformly divided into multiple sector-shaped regions; and along the radial direction of the air preheater, the cross-section of the air preheater is sequentially divided into multiple annular regions from the inside out.

[0031] The sector-shaped region refers to the sector-shaped portion obtained by dividing the cross-section of the air preheater circumferentially; for example, the second 10° sector-shaped region obtained by dividing the 360° circumference of the air preheater cross-section equally. The annular region refers to the annular strip-shaped portion obtained by dividing the cross-section of the air preheater radially; for example, the second annular strip from the center of the air preheater cross-section outward is marked as annular region B.

[0032] Intersecting all sector regions with all annular regions forms the multiple partitioned regions (such as...). Figure 2 (As shown).

[0033] Among the above-mentioned optional methods, the ash accumulation monitoring grid can be further optimized by dividing it along the circumferential and radial directions to improve the local positioning accuracy of ash accumulation in the air preheater, providing a spatial basis for subsequent precise soot blowing.

[0034] In one alternative approach, S2 includes: The image information of the heat exchange element is acquired by a high-temperature resistant camera device installed inside the air preheater.

[0035] Among them, high-temperature resistant camera devices refer to cameras that can withstand the high-temperature environment inside the air preheater and acquire images; for example, high-definition industrial endoscopes installed in specific locations inside the air preheater that can work stably for a long time in high-temperature environments above 147°C.

[0036] Using intelligent image processing algorithms, the region images corresponding to each segmented region in the image information are analyzed and processed to determine the degree of dust accumulation in each segmented region.

[0037] Among them, intelligent image processing algorithms refer to computer algorithms used to analyze image information and identify dust accumulation features; for example, an algorithm program that uses digital image processing technology to perform grayscale analysis and texture feature extraction on the image of region B2, and then estimates its degree of dust accumulation. A region image refers to a portion of image data corresponding to a specific divided region; for example, a partial image extracted from the overall image of the air preheater's interior captured by a high-temperature resistant camera device, containing only the positioning unit B2 formed by the intersection of the circumferential second sector region and the radial B annular region.

[0038] Specifically: 1) Preprocess the image of each region to improve image quality and suppress noise interference, resulting in a preprocessed region image. 2) Extract feature parameters related to the dust accumulation status from the preprocessed region image. These feature parameters include the image grayscale mean and texture features. 3) Input the extracted feature parameters into a pre-established dust accumulation analysis model to calculate and output a quantitative value representing the severity of dust accumulation in the divided region. The dust accumulation analysis model is trained based on historical dust accumulation image data and corresponding dust accumulation degree calibration values. The quantitative value is compared with a preset dust removal threshold set for the divided region to determine whether to trigger a dust removal operation.

[0039] Among the above-mentioned optional methods, high-temperature resistant camera devices are further used to collect image information, and combined with intelligent algorithm processing, to enhance the real-time performance and accuracy of dust accumulation detection and avoid misjudgment and missed judgment.

[0040] In one alternative approach, it also includes: When the soot blower is controlled to perform directional soot blowing on any of the divided areas for a first preset time, it is determined that the soot blower has completed one directional soot blowing operation on any of the divided areas.

[0041] The first preset duration refers to the length of time required to complete one directional soot blowing operation; for example, setting the soot blower to continuously blow area B2 for 3 minutes is considered to complete one directional soot blowing operation.

[0042] Among the above-mentioned optional methods, the criteria for determining the duration of soot blowing completion are further defined to ensure the accurate execution of soot blowing operations, prevent invalid operations, and improve the reliability of soot blower operation.

[0043] In one alternative approach, the step of controlling the air preheater to exit the speed adjustment cleaning mode when the dust accumulation level in any of the divided areas is detected to be lower than the preset soot blowing threshold includes: When the dust accumulation level in any of the divided areas is detected to be lower than the preset dust blowing threshold, the air preheater is controlled to exit the speed adjustment dust cleaning mode after a second preset time interval.

[0044] The second preset duration refers to the extra running time to delay exiting the speed adjustment cleaning mode after the dust accumulation level has fallen below the threshold, in order to consolidate the dust removal effect. For example, after detecting that the dust accumulation level in area B2 has fallen below the threshold, the air preheater is controlled to continue running in the speed adjustment cleaning mode for 2 to 3 full cycles before exiting the speed adjustment cleaning mode.

[0045] Among the above-mentioned optional methods, the ash removal process can be further optimized by monitoring the degree of ash accumulation, thereby reducing unnecessary energy consumption and steam loss and lowering operating costs.

[0046] In one alternative approach, after controlling the air preheater to exit the speed adjustment cleaning mode, the method further includes: Control the soot blower to stop directional soot blowing on any of the defined areas.

[0047] Among the above-mentioned optional methods, the dust removal mode exit mechanism can be further optimized to avoid frequent start-stop operations affecting equipment performance and improve the stability and efficiency of air preheater operation.

[0048] In one alternative approach, it also includes: When the dust accumulation level in any divided area exceeds the preset dust removal threshold, an alarm message is output for that divided area.

[0049] The alarm information refers to the prompt signal generated when the dust accumulation level of a certain area exceeds the preset threshold. For example, when the image processing algorithm determines that the dust accumulation level of area B2 reaches 18% (exceeding the preset dust removal threshold of 15%), a visual warning will pop up on the control platform interface and an audio prompt will be issued, with the content "Dust accumulation in area B2 exceeds the standard, please handle it".

[0050] Among the above-mentioned optional methods, the alarm information reminder function can be further used to enhance the real-time response capability to the dust accumulation problem, so as to facilitate the timely handling of abnormal areas.

[0051] To better illustrate the technical solution of this embodiment, the following examples are used for specific explanation: S10: Divide the cross-section of the air preheater into 36 10° sector regions (marked as 1 to 36) along the circumference of the air preheater, and divide it into 7 annular regions A, B, C, D, E, F, and G along the radial direction of the air preheater from the inside to the outside; intersect all the sector regions with all the annular regions to form 252 independent division regions, for example, the division region B2 is formed by the intersection of the circumferential sector region No. 2 and the radial annular zone B; S20: The high-temperature resistant camera device installed inside the air preheater collects image information of the heat exchange elements, and uses an intelligent image processing algorithm to analyze and process the image of the area corresponding to the division area B2, and determines that the ash accumulation degree of the division area B2 is 18%, which exceeds the preset soot blowing threshold of 15%; then an alarm message for the division area B2 is generated, and a visual warning pops up on the control platform interface. S30: Control the soot blower to perform directional soot blowing on the designated area B2. After a first preset duration of 3 minutes, determine that one soot blowing operation is completed. If the dust accumulation degree of area B2 is detected again and found to be 16%, which is still higher than the threshold, perform a second directional soot blowing. If the dust accumulation degree is detected after the second soot blowing and found to be 14%, which is lower than the threshold, the cleaning process ends. If the dust accumulation degree is still higher than the threshold after the second soot blowing (e.g., still 16%), control the air preheater to start the speed and adjust the cleaning mode. S40: In the speed adjustment and dust removal mode, when the partitioned area B2 passes through the primary air chamber and the secondary air chamber, the air preheater is controlled to run at the target speed of 5 r / min so that the partitioned area B2 is heated quickly; when the partitioned area B2 enters the flue gas chamber, the air preheater is controlled to return to the normal speed of 1 r / min. S50: During the operation of the speed adjustment dust removal mode, the dust accumulation level of the divided area B2 is continuously monitored. When the dust accumulation level is detected to drop to 10% (below the threshold of 15%), the air preheater is controlled to continue running in this mode for a second preset duration (such as 2 full cycles, about 2 minutes) to consolidate the effect. Then, the speed adjustment dust removal mode is exited, the air preheater resumes normal speed operation throughout the process, and the entire precision dust removal process ends.

[0052] Figure 3 A schematic diagram of an embodiment of a precision dust removal system 200 for an air preheater provided by the present invention is shown. Figure 3 As shown, the air preheater precision dust removal system 200 includes: a zone division module 210, a dust accumulation detection module 220, a first control module 230, and a second control module 240; The region division module 210 is used to: divide the cross-section of the air preheater into multiple regions according to the circumferential and radial division methods along the air preheater. The ash accumulation detection module 220 is used to: determine the degree of ash accumulation in each divided area based on the image information of the heat exchange elements inside the air preheater; The first control module 230 is configured to: when the degree of ash accumulation in any divided area is greater than a preset soot blowing threshold, control the soot blower to perform directional soot blowing on the any divided area; after completing a preset number of directional soot blowing operations on the any divided area, if the degree of ash accumulation in the any divided area is still greater than the preset soot blowing threshold, control the air preheater to start a speed adjustment cleaning mode; wherein, the speed adjustment cleaning mode is configured to: control the air preheater to increase its speed to a target speed so that the any divided area can quickly pass through the primary air chamber and the secondary air chamber, and when the any divided area enters the flue gas chamber, control the air preheater to return to normal speed operation; The second control module 240 is used to: when the air preheater is in the speed adjustment cleaning mode, and the dust accumulation level in any of the divided areas is detected to be lower than the preset dust blowing threshold, control the air preheater to exit the speed adjustment cleaning mode.

[0053] In an alternative embodiment, the region division module 210 is specifically used for: Along the circumference of the air preheater, the cross-section of the air preheater is uniformly divided into multiple sector-shaped regions; and along the radial direction of the air preheater, the cross-section of the air preheater is sequentially divided into multiple annular regions from the inside out. The intersection of all sector regions and all annular regions forms the multiple partitioned regions.

[0054] In one alternative embodiment, the dust accumulation detection module 220 is specifically used for: The image information of the heat exchange element is acquired by a high-temperature resistant camera device installed inside the air preheater; Using intelligent image processing algorithms, the region images corresponding to each segmented region in the image information are analyzed and processed to determine the degree of dust accumulation in each segmented region.

[0055] In one alternative embodiment, the method further includes: a soot blowing determination module; the soot blowing determination module is used for: When the soot blower is controlled to perform directional soot blowing on any of the divided areas for a first preset time, it is determined that the soot blower has completed one directional soot blowing operation on any of the divided areas.

[0056] In one alternative embodiment, the second control module 240 is specifically used for: When the dust accumulation level in any of the divided areas is detected to be lower than the preset dust blowing threshold, the air preheater is controlled to exit the speed adjustment dust cleaning mode after a second preset time interval.

[0057] In an alternative embodiment, the second control module 240 is further configured to: Control the soot blower to stop directional soot blowing on any of the defined areas.

[0058] In one alternative embodiment, it further includes: an alarm module; the alarm module is used for: When the dust accumulation level in any divided area exceeds the preset dust removal threshold, an alarm message is output for that divided area.

[0059] It should be noted that the beneficial effects of the air preheater precision cleaning system 200 provided in the above embodiments are the same as those of the air preheater precision cleaning method described above, and will not be repeated here. Furthermore, the system provided in the above embodiments is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the system can be divided into different functional modules according to the actual situation to complete all or part of the functions described above. In addition, the system and method embodiments provided in the above embodiments belong to the same concept, and their specific implementation process is detailed in the method embodiments, and will not be repeated here.

[0060] The air preheater precision cleaning system 200 of the present invention can be a computer program (including program code) running on a computer device. For example, the air preheater precision cleaning system 200 of the present invention is an application software that can be used to execute the corresponding steps in the air preheater precision cleaning method of the present invention.

[0061] In some embodiments, the air preheater precision cleaning system 200 of the present invention can be implemented in a combination of hardware and software. As an example, the air preheater precision cleaning system 200 of the present invention can be a processor in the form of a hardware decoding processor, which is programmed to execute the air preheater precision cleaning method of the present invention. For example, the processor in the form of a hardware decoding processor can be one or more application specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), or other electronic components.

[0062] The modules described in the embodiments of this invention can be implemented in software or hardware. The names of the modules are not, in some cases, limiting the scope of the module itself.

[0063] An electronic device according to an embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements any of the above-mentioned air preheater precise cleaning methods. That is, an electronic device according to an embodiment of the present invention may include, but is not limited to: a processor and a memory; the memory is used to store the computer program; the processor is used to execute the air preheater precise cleaning method shown in any embodiment of the present invention by calling the computer program.

[0064] In one alternative embodiment, an electronic device is provided, such as Figure 4 As shown, Figure 4The illustrated electronic device 4000 includes a processor 4001 and a memory 4003. The processor 4001 and the memory 4003 are connected, for example, via a bus 4002. Optionally, the electronic device 4000 may further include a transceiver 4004, which can be used for data interaction between the electronic device and other electronic devices, such as sending and / or receiving data. It should be noted that in practical applications, the transceiver 4004 is not limited to one type, and the structure of the electronic device 4000 does not constitute a limitation on the embodiments of the present invention.

[0065] Processor 4001 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this invention. Processor 4001 may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0066] Bus 4002 may include a path for transmitting information between the aforementioned components. Bus 4002 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Bus 4002 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 4 The bus 4002 is represented by only one thick line, but this does not mean that there is only one bus or one type of bus.

[0067] The memory 4003 may be ROM (Read Only Memory) or other types of static storage devices capable of storing static information and instructions, RAM (Random Access Memory) or other types of dynamic storage devices capable of storing information and instructions, or EEPROM (Electrically Erasable Programmable Read Only Memory), CD-ROM (Compact Disc Read Only Memory) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto.

[0068] The memory 4003 stores application code (computer program) for executing the present invention, and its execution is controlled by the processor 4001. The processor 4001 executes the application code stored in the memory 4003 to implement the content shown in the foregoing method embodiments.

[0069] Among them, electronic devices can also be terminal devices. A terminal device can be any terminal device that can install applications and access web pages through applications, including at least one of smartphones, tablets, laptops, desktop computers, smart speakers, smartwatches, smart TVs, and smart in-vehicle devices.

[0070] It should be noted that, Figure 4 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

[0071] An embodiment of the present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements any of the above-described air preheater precise dust removal methods.

[0072] Alternatively, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), magnetic tape, a floppy disk, and an optical data storage device, etc.

[0073] In an exemplary embodiment, a computer program product or computer program is also provided, which includes computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the aforementioned air preheater precise dust removal method.

[0074] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0075] It should be understood that the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of methods and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0076] The computer-readable storage medium provided in this invention can be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this invention, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0077] The aforementioned computer-readable storage medium carries one or more programs, which, when executed by the electronic device, cause the electronic device to perform the method shown in the above embodiments.

[0078] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this invention is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-disclosed concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this invention.

[0079] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and represent a limitation on a specific order or sequence. Where appropriate, the order of use for similar objects can be interchanged so that the embodiments of this application described herein can be implemented in an order other than that shown or described.

[0080] Those skilled in the art will recognize that this invention can be implemented as a system, method, or computer program product. Therefore, this invention can be specifically implemented in the following forms: it can be entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, this invention can also be implemented as a computer program product contained in one or more computer-readable media, which includes computer-readable program code.

[0081] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for precise dust removal in an air preheater, characterized in that, include: The cross-section of the air preheater is divided into regions according to the circumferential and radial division methods, resulting in multiple division regions. Based on the image information of the heat exchange elements inside the air preheater, the degree of ash accumulation in each divided region is determined. When the dust accumulation in any segmented area exceeds a preset soot blowing threshold, the soot blower is controlled to perform directional soot blowing on the segmented area. After performing a preset number of directional soot blowing operations on the segmented area, if the dust accumulation in the segmented area still exceeds the preset soot blowing threshold, the air preheater is controlled to start a speed adjustment cleaning mode. The speed adjustment cleaning mode is as follows: the air preheater is controlled to increase its speed to a target speed so that the segmented area can quickly pass through the primary air chamber and the secondary air chamber, and when the segmented area enters the flue gas chamber, the air preheater is controlled to return to normal speed operation. During the operation of the air preheater in the speed adjustment cleaning mode, when the dust accumulation level in any of the divided areas is detected to be lower than the preset dust blowing threshold, the air preheater is controlled to exit the speed adjustment cleaning mode.

2. The precise dust removal method for air preheaters according to claim 1, characterized in that, The steps of dividing the cross-section of the air preheater into multiple regions according to the method of dividing along the circumference and radial direction of the air preheater include: Along the circumference of the air preheater, the cross-section of the air preheater is uniformly divided into multiple sector-shaped regions; and along the radial direction of the air preheater, the cross-section of the air preheater is sequentially divided into multiple annular regions from the inside out. The intersection of all sector regions and all annular regions forms the multiple partitioned regions.

3. The precise dust removal method for air preheaters according to claim 1, characterized in that, The step of determining the degree of ash accumulation in each divided region based on image information of the heat exchange elements inside the air preheater includes: The image information of the heat exchange element is acquired by a high-temperature resistant camera device installed inside the air preheater; Using intelligent image processing algorithms, the region images corresponding to each segmented region in the image information are analyzed and processed to determine the degree of dust accumulation in each segmented region.

4. The precise dust removal method for air preheaters according to claim 1, characterized in that, Also includes: When the soot blower is controlled to perform directional soot blowing on any of the divided areas for a first preset time, it is determined that the soot blower has completed one directional soot blowing operation on any of the divided areas.

5. The precise dust removal method for air preheaters according to claim 1, characterized in that, When the dust accumulation level in any of the defined areas is detected to be lower than the preset soot blowing threshold, the step of controlling the air preheater to exit the speed adjustment and dust removal mode includes: When the dust accumulation level in any of the divided areas is detected to be lower than the preset dust blowing threshold, the air preheater is controlled to exit the speed adjustment dust cleaning mode after a second preset time interval.

6. The precise dust removal method for air preheaters according to claim 5, characterized in that, After controlling the air preheater to exit the speed adjustment and dust removal mode, the method further includes: Control the soot blower to stop directional soot blowing on any of the defined areas.

7. The method for precise dust removal of an air preheater according to any one of claims 1 to 6, characterized in that, Also includes: When the dust accumulation level in any divided area exceeds the preset dust removal threshold, an alarm message is output for that divided area.

8. A precision dust removal system for an air preheater, characterized in that, include: The system includes a region division module, a dust accumulation detection module, a first control module, and a second control module. The region division module is used to divide the cross-section of the air preheater into multiple regions according to the method of dividing along the circumference and radial direction of the air preheater. The ash accumulation detection module is used to: determine the degree of ash accumulation in each divided area based on image information of the heat exchange elements inside the air preheater; The first control module is configured to: when the degree of ash accumulation in any divided area is greater than a preset soot blowing threshold, control the soot blower to perform directional soot blowing on the any divided area; after completing a preset number of directional soot blowing operations on the any divided area, if the degree of ash accumulation in the any divided area is still greater than the preset soot blowing threshold, control the air preheater to start a speed adjustment cleaning mode; wherein, the speed adjustment cleaning mode is configured to: control the air preheater to increase its speed to a target speed so that the any divided area can quickly pass through the primary air chamber and the secondary air chamber, and when the any divided area enters the flue gas chamber, control the air preheater to return to normal speed operation; The second control module is used to: when the air preheater is in the speed adjustment cleaning mode, and the dust accumulation level in any of the divided areas is detected to be lower than the preset dust blowing threshold, control the air preheater to exit the speed adjustment cleaning mode.

9. An electronic device, characterized in that, The electronic device includes a processor coupled to a memory, the memory storing at least one computer program, which is loaded and executed by the processor to enable the electronic device to implement the air preheater precision cleaning method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one computer program, which, when executed by a processor, implements the air preheater precision cleaning method as described in any one of claims 1 to 7.

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