Intelligent soot blowing system and method based on equipment soot deposition state matrix monitoring

Abstract

The invention discloses an intelligent soot blowing system and method based on equipment soot deposition state matrix monitoring, and the system comprises a soot blower system control module, a temperature measurement device, a sound wave measurement matrix system, a first soot blowing system and a second soot blowing system, the sound wave measurement matrix system and the second soot blowing system are arranged in a shaft flue at the tail part of the boiler; the soot blower system control module is connected with the temperature measuring device, the sound wave measuring matrix system, the first soot blowing system and the second soot blowing system, the system and the method can accurately judge the soot deposition position, and frequent soot blowing on a region without soot deposition is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of boiler sootblowing, and relates to an intelligent sootblowing system and method based on equipment soot accumulation state matrix monitoring. Background Art

[0002] In the actual operation of the boiler, there are many unfavorable factors that affect the safety of the heating surface: overheating and thinning of the furnace tube will greatly affect its life, and even lead to tube burst and working fluid leakage; on the other hand, the ash and slagging on the fire side of the boiler directly reduces the thermal efficiency of the unit. As the demand for low-load operation of the unit continues to increase, the reduction of flue gas temperature and flow rate in the furnace will cause the slag blocks in the furnace to fall off and the ash blockage of the convection heating surface will increase. These factors reduce the safety of the boiler under low-load operation and increase coal consumption. Therefore, the safety of the heating surface of the pulverized coal boiler and the protection of ash and slagging need to be paid great attention.

[0003] The commonly used anti-slagging method for boilers is to strengthen soot blowing. Due to the lack of effective monitoring methods for ash accumulation and contamination in the furnace, the current operation of soot blowers is mainly through monitoring parameters such as flue gas temperature, steam temperature, and convection section differential pressure in the furnace. These parameters can only reflect the overall ash accumulation of the boiler, and cannot determine the location of ash accumulation. As a result, when ash accumulation occurs, only the entire furnace can be soot blown as a whole. Some areas without ash accumulation also need to be soot blown frequently, causing unnecessary damage and thinning of some furnace tubes. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an intelligent sootblowing system and method based on equipment dust accumulation status matrix monitoring, which can accurately determine the dust accumulation position and avoid frequent sootblowing in non-dust accumulated areas.

[0005] To achieve the above-mentioned objectives, the present invention discloses an intelligent sootblowing system based on equipment ash accumulation status matrix monitoring, comprising a sootblower system control module, a temperature measuring device, an acoustic wave measurement matrix system, a first sootblowing system and a second sootblowing system, wherein the temperature measuring device and the first sootblowing system are installed in the horizontal flue of the boiler, and the acoustic wave measurement matrix system and the second sootblowing system are arranged in the vertical shaft flue at the rear of the boiler; the sootblower system control module is connected to the temperature measuring device, the acoustic wave measurement matrix system, the first sootblowing system and the second sootblowing system.

[0006] The further improvement of the intelligent sootblowing system based on equipment soot accumulation state matrix monitoring of the present invention is:

[0007] Furthermore, the first sootblowing system is divided into a plurality of groups of first sootblowers, and each group of first sootblowers is arranged in a horizontal flue of the boiler.

[0008] Furthermore, the first temperature measuring device includes a plurality of groups of temperature measuring points, one group of first sootblowers corresponds to one group of temperature measuring points, and each group of temperature measuring points is arranged within the blowing range of the corresponding group of first sootblowers.

[0009] Further, a group of temperature measurement points includes several rows of temperature measurement points, and each row of temperature measurement points includes multiple temperature measurement points.

[0010] Furthermore, each temperature measuring point is sequentially provided with a plurality of thermocouples within a preset height range.

[0011] Furthermore, the second sootblowing system includes a plurality of groups of second sootblowers, and the acoustic wave measurement matrix system includes a plurality of test elements, and one group of second sootblowers corresponds to one test element.

[0012] Furthermore, a group of second sootblowers is used to blow away the accumulated soot in a blowing area on the inner wall of the vertical flue at the rear of the boiler.

[0013] Furthermore, the purge area is an annular area, and the corresponding test elements are located on the same cross section of the annular area.

[0014] Furthermore, the test element includes a plurality of sound velocity detection devices, each of which is arranged on four walls of the vertical shaft flue at the rear of the boiler to measure the sound wave propagation speed in different areas within the cross section.

[0015] The present invention discloses an intelligent soot blowing method based on equipment soot accumulation state matrix monitoring, comprising the following steps:

[0016] For each group of first soot blowers, when the number of temperature measuring points where the temperature difference between the temperature measured and the smoke temperature within the soot blowing range of any group of first soot blowers is greater than a preset value exceeds a first preset number threshold, the group of first soot blowers is started to blow away the accumulated soot within the soot blowing range of the group of first soot blowers;

[0017] For each test element, when the number of sound velocity detection devices in any test element whose measured sound wave propagation velocity is greater than the original sound wave propagation velocity exceeds a second preset number threshold, the second soot blower of the corresponding group of the test element is started to perform soot blowing.

[0018] The present invention has the following beneficial effects:

[0019] When the intelligent sootblowing system and method based on equipment soot accumulation status matrix monitoring described in the present invention are specifically operated, the traditional boiler sootblowing mode is sootblowing according to the exhaust gas temperature or "timed and quantitative" sootblowing, which has a large blindness. Frequent sootblowing of the entire furnace will cause some furnace tubes to be damaged and thinned. To avoid the above problems, the present invention detects the ash accumulation in the horizontal flue of the boiler and the vertical flue at the rear of the boiler through a temperature measuring device and an acoustic wave measurement matrix system, and controls the first sootblowing system and the second sootblowing system to provide on-demand sootblowing plans for different teams. Under the premise that the heat exchange characteristics of the heating surface are guaranteed, the sootblowing frequency is optimized and minimized to reduce the blowing damage of the heating surface, which can reduce the sootblowing frequency, reduce the boiler sootblowing steam consumption, reduce the operating cost of the boiler sootblowing system, and improve the boiler heat transfer efficiency and unit economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 The intelligent sootblowing system based on the boiler horizontal flue soot accumulation state matrix monitoring is described in the present invention.

[0022] Figure 2 The invention discloses an intelligent sootblowing system based on matrix monitoring of the soot accumulation state of the vertical shaft of the tail flue of the boiler. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0026] It should be further understood that the term "and / or" used in the present specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0027] It should be understood that, although the terms first, second, third, etc. may be used to describe preset ranges, etc. in the embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are only used to distinguish preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0028] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can usually be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0031] Embodiment 1

[0032] refer to Figure 1 The intelligent sootblowing system based on equipment ash accumulation status matrix monitoring described in the present invention includes a sootblower system control module, a temperature measuring device, an acoustic wave measurement matrix system, a first sootblowing system and a second sootblowing system, wherein the temperature measuring device and the first sootblowing system are installed in the horizontal flue of the boiler, and the acoustic wave measurement matrix system and the second sootblowing system are arranged in the vertical shaft flue at the rear of the boiler.

[0033] The sootblower system control module is connected with the temperature measuring device, the acoustic wave measurement matrix system, the first sootblowing system and the second sootblowing system.

[0034] In this embodiment, the first sootblowing system is divided into several groups of first sootblowers, each group of first sootblowers is arranged in the horizontal flue of the boiler, the first temperature measuring device includes several groups of temperature measuring points, one group of first sootblowers corresponds to one group of temperature measuring points, each group of temperature measuring points is arranged within the blowing range of the corresponding group of first sootblowers, one group of temperature measuring points includes several rows of temperature measuring points, each row of temperature measuring points includes multiple temperature measuring points, and each temperature measuring point is sequentially provided with several thermocouples within a preset height range for measuring temperature values ​​at different heights.

[0035] When working, the sootblower system control module obtains the spatial temperature distribution within a certain height range above the bottom wall of the horizontal flue based on the monitoring data of the temperature measuring device and the data of the temperature measuring points arranged at different heights. The ash accumulation temperature is closer to the wall temperature and lower than the flue gas temperature. The temperature level is inversely proportional to the ash accumulation height. The more ash accumulation, the closer the temperature is to the heating surface temperature, and the greater the temperature difference with the flue gas temperature. When there are multiple temperature values ​​with a large temperature difference with the flue gas temperature in the same area, it is determined according to the measurement results that there is a lot of ash accumulation in this area, so as to control the first sootblowing system to intervene and purge this area. When there are a small number of temperature values ​​with a large temperature difference with the flue gas temperature, the sootblower system control module determines that it is light ash accumulation, and the first sootblowing system may not be selected for operation; when there are many temperature values ​​with a large temperature difference with the flue gas temperature in the local area, the sootblower system control module determines that it is moderate ash accumulation, and controls the first sootblower to automatically blow soot in this area; when there are many temperature values ​​with a large temperature difference with the flue gas temperature in most areas, the sootblower system control module determines that it is heavy ash accumulation, and controls the first sootblower to automatically blow soot in all the above areas.

[0036] In this embodiment, Figure 2 As shown, the second sootblowing system includes several groups of second sootblowers, and the acoustic wave measurement matrix system includes several test elements. One group of second sootblowers corresponds to one test element. A group of second sootblowers is used to purge ash accumulation in a purge area on the inner wall of the vertical flue at the rear of the boiler, wherein the purge area is an annular area, and the corresponding test elements are located on the same cross-section of the annular area, so as to detect the sound wave propagation speed in the cross-section, and reflect the blockage condition of ash accumulation in the annular area.

[0037] The test element includes several sound velocity detection devices, each of which is arranged on the four walls of the vertical shaft flue at the rear of the boiler to measure the sound wave propagation speed in different areas of the cross-section, and then measure the ash accumulation distribution in different areas of the cross-section.

[0038] During operation, based on the monitoring data of the sound wave matrix system, the propagation speed of sound waves in solids is much greater than that in gases. The sound wave matrix reflects the average density in the area by measuring the speed at which sound waves pass through the space. Changes in the degree of dust accumulation will cause differences in the propagation speed of sound waves. When the propagation speed of multiple groups of sound waves is higher than the propagation speed in the initial state, it is considered that there is a dust accumulation problem. At this time, the second soot blower is controlled to blow soot.

[0039] Embodiment 2

[0040] The present invention discloses an intelligent sootblowing method based on equipment dust accumulation status matrix monitoring. The method is implemented based on the intelligent sootblowing system based on equipment dust accumulation status matrix monitoring. The intelligent sootblowing system based on equipment dust accumulation status matrix monitoring comprises a sootblower system control module, a temperature measuring device, an acoustic wave measurement matrix system, a first sootblowing system and a second sootblowing system, wherein the temperature measuring device and the first sootblowing system are installed in a horizontal flue of a boiler, and the acoustic wave measurement matrix system and the second sootblowing system are arranged in a vertical shaft flue at the rear of the boiler.

[0041] Specifically, the intelligent sootblowing method based on equipment dust accumulation state matrix monitoring includes the following steps:

[0042] For each group of first soot blowers, when the number of temperature measuring points where the temperature difference between the temperature measured and the smoke temperature within the soot blowing range of any group of first soot blowers is greater than a preset value exceeds a first preset number threshold, the group of first soot blowers is started to blow away the accumulated soot within the soot blowing range of the group of first soot blowers;

[0043] For each test element, when the number of sound velocity detection devices in any test element whose measured sound wave propagation velocity is greater than the original sound wave propagation velocity exceeds a second preset number threshold, the second soot blower of the corresponding group of the test element is started to perform soot blowing.

[0044] Embodiment 3

[0045] A computer device 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, the steps of the intelligent sootblowing method based on the monitoring of the equipment dust accumulation state matrix are implemented, for example, including: for each group of first sootblower, when the number of temperature measuring points whose temperature difference between the temperature measured in the sootblowing range of any group of first sootblower and the smoke temperature is greater than a preset value exceeds a first preset number threshold, the group of first sootblower is started to blow away the dust accumulated in the sootblowing range of the group of first sootblower; for each test element, when the number of sound velocity detection devices whose sound wave propagation velocity measured in any test element is greater than the original sound wave propagation velocity exceeds a second preset number threshold, the corresponding group of second sootblower of the test element is started to blow away the dust. Wherein, the memory may include a memory, such as a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk memory, etc.; the processor, the network interface, and the memory are interconnected through an internal bus, and the internal bus may be an industrial standard architecture bus, a peripheral component interconnection standard bus, an extended industrial standard architecture bus, etc., and the bus may be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs, specifically, the programs may include program codes, and the program codes include computer operation instructions. The memory may include internal memory and non-volatile memory, and provide instructions and data to the processor.

[0046] Embodiment 4

[0047] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the intelligent sootblowing method based on the monitoring of the equipment dust accumulation state matrix are implemented, for example, including: for each group of first sootblower, when the number of temperature measuring points whose temperature difference between the temperature measured in the sootblowing range of any group of first sootblower and the smoke temperature is greater than a preset value exceeds a first preset number threshold, the group of first sootblower is started to blow away the dust accumulated in the sootblowing range of the group of first sootblower; for each test element, when the number of sound velocity detection devices whose sound wave propagation velocity measured in any test element is greater than the original sound wave propagation velocity exceeds a second preset number threshold, the second sootblower corresponding to the test element is started to blow away the dust. Specifically, the computer-readable storage medium includes, but is not limited to, for example, volatile memory and / or non-volatile memory. The volatile memory may include random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may include read-only memory (ROM), hard disk, flash memory, optical disk, magnetic disk, etc.

[0048] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0049] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0050] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0051] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0052] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and disclosure of the invention. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0053] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An intelligent sootblowing system based on equipment dust accumulation status matrix monitoring, characterized in that: It includes a sootblower system control module, a temperature measuring device, an acoustic wave measurement matrix system, a first sootblowing system and a second sootblowing system, wherein the temperature measuring device and the first sootblowing system are installed in the horizontal flue of the boiler, and the acoustic wave measurement matrix system and the second sootblowing system are arranged in the vertical flue at the rear of the boiler; the sootblower system control module is connected with the temperature measuring device, the acoustic wave measurement matrix system, the first sootblowing system and the second sootblowing system.

2. The intelligent sootblowing system based on equipment dust accumulation status matrix monitoring according to claim 1 is characterized in that: The first sootblowing system is divided into a plurality of groups of first sootblowers, and each group of first sootblowers is arranged in a horizontal flue of the boiler.

3. The intelligent sootblowing system based on equipment dust accumulation status matrix monitoring according to claim 2 is characterized in that: The first temperature measuring device includes a plurality of groups of temperature measuring points. A group of first sootblowers corresponds to a group of temperature measuring points. Each group of temperature measuring points is arranged within the blowing range of the corresponding group of first sootblowers.

4. The intelligent sootblowing system based on equipment dust accumulation status matrix monitoring according to claim 3 is characterized in that: A group of temperature measurement points includes several rows of temperature measurement points, and each row of temperature measurement points includes multiple temperature measurement points.

5. The intelligent sootblowing system based on equipment dust accumulation status matrix monitoring according to claim 4 is characterized in that: Each temperature measuring point is provided with a plurality of thermocouples in sequence within a preset height range.

6. The intelligent sootblowing system based on equipment dust accumulation status matrix monitoring according to claim 1 is characterized in that: The second sootblowing system includes a plurality of groups of second sootblowers, and the acoustic wave measurement matrix system includes a plurality of test elements, wherein a group of second sootblowers corresponds to one test element.

7. The intelligent sootblowing system based on equipment dust accumulation status matrix monitoring according to claim 6 is characterized in that: A group of second sootblowers is used to blow away the ash accumulation in a blowing area on the inner wall of the vertical flue at the rear of the boiler.

8. The intelligent sootblowing system based on equipment dust accumulation status matrix monitoring according to claim 7 is characterized in that: The purge area is an annular area, and the corresponding test elements are located on the same cross section of the annular area.

9. The intelligent sootblowing system based on equipment dust accumulation status matrix monitoring according to claim 8 is characterized in that: The test element comprises a plurality of sound velocity detection devices, each of which is arranged on the four walls of the vertical shaft flue at the rear of the boiler to measure the sound wave propagation velocity in different areas within the cross section.

10. An intelligent sootblowing method based on equipment dust accumulation state matrix monitoring, characterized in that: The intelligent sootblowing system based on equipment dust accumulation state matrix monitoring according to any one of claims 1 to 9 comprises the following steps: For each group of first soot blowers, when the number of temperature measuring points where the temperature difference between the temperature measured and the smoke temperature within the soot blowing range of any group of first soot blowers is greater than a preset value exceeds a first preset number threshold, the group of first soot blowers is started to blow away the accumulated soot within the soot blowing range of the group of first soot blowers; For each test element, when the number of sound velocity detection devices in any test element whose measured sound wave propagation velocity is greater than the original sound wave propagation velocity exceeds a second preset number threshold, the second soot blower of the corresponding group of the test element is started to perform soot blowing.

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