A tabm-based rotary air preheater cold end initial blockage identification method

Abstract

This invention discloses a TabM-based method and system for identifying initial blockage at the cold end of a rotary air preheater, belonging to the field of air preheater technology. The method includes acquiring the metal temperature, flue gas path characterization, and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under conditions to be identified; determining the cold end temperature domain-deposition zone boundary to obtain deposition zone units; forming a zone status table based on the deposition zone units; inputting the zone status table into the TabM zone assignment model for assignment calculation to obtain zone status labels; and determining initial blockage based on the zone status labels and the cold end temperature domain-deposition zone boundary to identify the initial blockage sector. This method simultaneously introduces the differences in metal temperature, flue gas path characterization, and local resistance characterization within the corresponding spatial range of the normal operating conditions and the conditions to be identified, jointly determining the cold end temperature domain deposition zone boundary and merging them to form deposition zone units with common deposition determination meanings.

Description

Technical Field

[0001] This invention relates to the field of air preheater technology, specifically to a method, system, device, medium, and procedure for identifying initial blockage at the cold end of a rotary air preheater based on TabM. Background Technology

[0002] Rotary air preheaters are used for heat exchange between boiler flue gas and primary and secondary air. The cold end is located in a lower temperature range, making it easier for ash and sulfate-like viscous substances in the flue gas to condense and adhere to the surface of the heat exchange elements, gradually forming a deposit layer and inducing blockage. Cold end blockage causes a reduction in local flow area, a shift in the flue gas flow path, increased local resistance, and deterioration of heat exchange and ventilation conditions, further leading to low-temperature corrosion and increased soot blowing load. Due to the localized and early-stage concealment of cold end deposition, the initial stage often sees viscous entry in certain circumferential sectors or localized areas along the flue gas flow direction, where the overall pressure drop and temperature parameters may not yet be significant, making it difficult for operators to locate the deposit in time. In engineering, under continuous equipment operation, it is necessary to utilize available metal temperature information and operating signals that reflect changes in flue gas flow and flow resistance to identify the cold end deposition state early, pinpointing the anomaly to a specific spatial area for targeted soot blowing or maintenance, preventing it from developing into widespread blockage. Monitoring of cold-end deposition and blockage in rotary air preheaters typically relies on changes in overall unit pressure drop, flue gas and air side temperatures, motor load variations, and threshold judgments based on soot blowing frequency and operational experience. Some solutions deploy several measuring points at the cold end to form fixed-zone temperature or differential pressure monitoring, identifying abnormal trends by comparing with historical benchmarks or reference curves under the same load. Other solutions utilize model calculations or simulations to estimate the risk of cold-end condensation and deposition, or confirm blockage locations through regular shutdown inspections and operational patrols.

[0003] However, existing technologies often rely on single-quantity changes in the entire machine or fixed zones as criteria, which fails to reflect the localized characteristics of cold-end deposition in the initial stage. This can easily lead to situations where viscous deposition has already begun in certain areas before overall indicators have changed significantly. Furthermore, fixed zone boundaries struggle to adapt to temperature variations and flow shifts under different loads and operating conditions, resulting in blurred boundaries of abnormal areas and making it difficult to form judgment units with shared depositional meanings. Moreover, existing methods often lack a joint characterization of the correlation between metal temperature changes, flue gas path changes, and local resistance changes, leading to unstable differentiation between initial blockage and transitional states. Ultimately, manual investigation is still required to pinpoint specific sectors. Summary of the Invention

[0004] Existing technologies for identifying initial blockage at the cold end of air preheaters often rely on single-quantity changes in the entire unit or fixed zones as criteria. This fails to reflect the localized characteristics of the initial stage of cold-end deposition, the fixed zone boundaries are difficult to adapt to different operating conditions, and there is a lack of joint characterization of multi-factor relationships. Furthermore, the distinction between initial blockage and transitional states is unstable, ultimately relying on manual inspection to locate specific sectors. This invention provides a TabM-based method for identifying initial blockage at the cold end of a rotary air preheater. By simultaneously introducing differences in metal temperature, flue gas path characterization, and local resistance characterization within the corresponding spatial range of normal and target operating conditions, this method jointly determines the cold-end temperature-domain deposition zone boundaries and merges them into deposition zone units with common deposition determination meanings.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] In a first aspect, the present invention provides a method for identifying initial blockage at the cold end of a rotary air preheater based on TabM, comprising: The metal temperature, flue gas flow path characterization, and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under the operating conditions to be identified are obtained to determine the cold end temperature range-deposition zone boundary and obtain the deposition zone unit. Extract the metal temperature shift, flue gas flow path change, and local resistance shift in the sedimentary zoning unit to form zoning sedimentary characterization quantities, and merge them according to the same sedimentary zoning unit to form a zoning state table; Input the partition status table into the TabM partition attribution model, perform attribution calculation, and obtain the partition status label; Initial plugging is determined based on the zoning status label and the cold end temperature range-deposition zoning boundary. Deposition zoning units whose zoning status labels meet the initial plugging conditions are identified as initial plugging sectors.

[0007] As a further improvement of the present invention, the step of obtaining the metal temperature, flue gas flow path characterization, and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under the operating conditions to be identified, determining the cold end temperature range-deposition zone boundary, and obtaining the deposition zone unit includes: The data acquisition units are defined according to the circumferential position of the cold end of the rotary air preheater and the direction of flue gas flow. The metal temperature acquisition position, the flue gas flow path characterization acquisition position, and the local resistance characterization acquisition position are set. Then, data is acquired under normal operating conditions and under the condition to be identified, and the metal temperature, flue gas flow path characterization, and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under the condition to be identified are obtained. The metal temperature, flue gas flow path characterization, and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under the operating conditions to be identified are correlated according to the same acquisition unit to determine the cold end temperature domain-deposition zone boundary and obtain the zone candidate body enclosed by the cold end temperature domain-deposition zone boundary. Continuous candidate regions in which the metal temperature difference sequence, flue gas flow path characterization difference sequence, and local resistance characterization difference sequence all change in the same direction are grouped into sedimentary partitioning units.

[0008] As a further improvement of the present invention, the metal temperature difference sequence includes: The metal temperatures at the intra-regional position, along the flue gas flow direction, and at the edge position in each candidate region are compared and calculated to obtain the intra-regional metal temperature difference, the metal temperature difference along the flue gas flow direction, and the edge metal temperature difference, which are then arranged according to the circumferential position and the flue gas flow direction. The differential sequence representing the path of the flue gas flow includes: The characteristics of the flue gas flow path in the inlet, middle and outlet sections of each candidate region are compared and calculated to obtain the differences in the inlet section, middle section and outlet sections respectively, and arranged according to the circumferential position and flue gas flow direction; The local resistance characterization difference sequence includes: The local resistance characteristics of the intra-regional location and the adjacent candidate region location in each candidate region are compared and calculated to obtain the differences in local resistance characteristics within the region and the differences in local resistance characteristics between adjacent candidate regions, and are arranged according to the circumferential location and the direction of flue gas flow.

[0009] As a further improvement of the present invention, the extraction of metal temperature offset, flue gas flow path change, and local resistance offset in the sedimentation partition unit forms a partition sedimentation characterization quantity, which is then merged according to the same sedimentation partition unit to form a partition status table, including: Extract the metal temperature offset, flue gas flow path variation, and local resistance offset from the metal temperature, flue gas flow path characterization, and local resistance characterization under normal and identified operating conditions in each deposition partition unit; Based on the metal temperature, flue gas flow path characterization and local resistance characterization under normal and identified operating conditions, extract the metal temperature offset, flue gas flow path change and local resistance offset, calculate the deviation and mutual coupling relationship of the metal temperature offset, flue gas flow path change and local resistance offset relative to normal operating conditions, and form the zonal deposition characterization quantity. The metal temperature offset, flue gas flow path change, local resistance offset, and regional deposition characterization are grouped together according to the same depositional zone unit to form a zone status table.

[0010] As a further improvement of the present invention, the step of inputting the partition status table into the TabM partition affiliation model, performing affiliation calculation, and obtaining the partition status label includes: Extract the status records of each partition according to the partition status table, and determine the input order according to the arrangement order of the sedimentation partition units determined by the cold end temperature domain-deposition partition boundary. Input them into the group input layer of the TabM partition belonging model in sequence to obtain the metal temperature group representation, flue gas flow path group representation, local resistance group representation and partition deposition group representation. The metal temperature group, flue gas flow path group, local resistance group, and partitioned deposition group are input into the merging and fusion layer for merging to form a partitioned fusion representation. The partitioned fusion representation is then input into the TabM backbone layer to calculate the assignment of latent variables of partitioned deposition state and obtain the state assignment value. The state attribution value is input into the state attribution layer to form the normal state attribution value, the transitional state attribution value, and the initial blockage state attribution value. The state corresponding to the maximum value among the normal state attribution value, the transitional state attribution value, and the initial blockage state attribution value is determined as the partition state label.

[0011] As a further improvement of the present invention, the step of determining initial plugging based on the partition status label and the cold end temperature range-deposition partition boundary, and identifying the deposition partition unit whose partition status label meets the initial plugging condition as the initial plugging sector, includes: The circumferential position and flue gas flow direction of each sedimentary zone unit are determined based on the cold end temperature range-sedimentary zone boundary, and the zone status label is mapped to the sedimentary zone unit. Depositional zoning units with the zoning status label of initial plugging are identified as initial plugging units, and depositional zoning units that are adjacent to initial plugging units on the cold end temperature domain-depositional zoning boundary and whose zoning status label is transitional are judged to meet the initial plugging conditions. The initial plugging unit and the sedimentary partition unit that meets the initial plugging condition are connected and merged according to the condition that they are circumferentially continuous and located in the same flue gas flow direction interval to form the initial plugging area; The initial blockage area is mapped to the sector range of the cold end of the rotary air preheater, and the sector range containing the initial blockage area is defined as the initial blockage sector.

[0012] Secondly, the present invention provides a TabM-based rotary air preheater cold-end initial blockage identification system, comprising: Deposition partitioning unit module: used to obtain the metal temperature, flue gas flow path characterization and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under the operating conditions to be identified, to determine the cold end temperature domain-deposition partition boundary, and to obtain the deposition partitioning unit; The partition status table module is used to extract the metal temperature offset, flue gas flow path change and local resistance offset in the sedimentation partition unit to form the partition sedimentation characterization quantity, and to merge them according to the same sedimentation partition unit to form the partition status table. Partition Status Label Module: Used to input the partition status table into the TabM partition attribution model, perform attribution calculation, and obtain partition status labels; The module for determining initial plugging sectors is used to determine initial plugging based on the partition status label and the cold end temperature range-deposition partition boundary, and to identify the depositional partition units whose partition status labels meet the initial plugging conditions as initial plugging sectors.

[0013] Thirdly, the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater.

[0014] Fourthly, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater.

[0015] Fifthly, the present invention provides a computer program product, including computer instructions, which, when executed by a processor, implement the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This method accurately determines the cold-end temperature range-deposition zone boundary by acquiring the metal temperature, flue gas flow path characteristics, and local resistance characteristics under normal and target operating conditions, thereby obtaining deposition zone units. It can capture the deposition situation in local areas of the cold end, overcoming the limitations of traditional methods that rely on changes in a single quantity of the entire machine or a fixed zone as the criterion, providing a more realistic basis for accurately identifying initial blockages. Secondly, considering the difficulty of adapting fixed zone boundaries to different operating conditions, this method dynamically determines the zone boundaries based on actual data under different operating conditions. This allows the deposition zone units to flexibly adapt to various complex and changing operating conditions, improving the versatility and reliability of the initial blockage identification method in different scenarios. Furthermore, addressing the lack of joint characterization of multi-factor relationships, this method extracts the metal temperature offset, flue gas flow path change, and local resistance offset from the deposition zone units to form zone deposition characterization quantities, which are then merged into a zone state table. This comprehensively considers the interaction between multiple key factors, more accurately reflecting the true state of cold-end deposition and avoiding the bias that may result from judging a single factor. Meanwhile, the partition status table is input into the TabM partition assignment model for assignment calculation to obtain partition status labels, improving the accuracy of status judgment. Finally, addressing the issues of unstable differentiation between initial blockage and transitional states and the reliance on manual inspection to locate specific sectors, this method uses partition status labels and the cold-end temperature range-deposition partition boundary for initial blockage determination. This method can stably and accurately distinguish between initial blockage and transitional states and automatically determine the initial blockage sector without manual inspection, greatly improving identification efficiency, reducing errors that may be caused by manual intervention, and providing strong support for the stable operation and maintenance of rotary air preheaters. It also helps to promptly detect and handle initial blockage problems at the cold end, reducing the risk of equipment failure. Attached Figure Description

[0017] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. In the drawings: Figure 1 This is a flowchart illustrating a TabM-based method for identifying initial blockage at the cold end of a rotary air preheater according to the present invention. Figure 2 This is a schematic diagram illustrating the specific process of the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater according to the present invention. Figure 3 This is a schematic diagram of the process of S1 in the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater according to the present invention. Figure 4 This is a schematic diagram of the process of S2 in the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater according to the present invention. Figure 5 This is a schematic diagram of the process of S3 in the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater according to the present invention. Figure 6 This is a schematic diagram of the process of S4 in the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater according to the present invention. Figure 7 This is a schematic diagram of the process of S5 in the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater according to the present invention. Figure 8 This is a schematic diagram of the process of S6 in the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater according to the present invention. Figure 9 This is a schematic diagram of sector mapping during initial blockage of the cold end of the rotary air preheater in an embodiment of the present invention; Figure 10 This is a schematic diagram of the cold end expansion partition and the initial blockage sector placement in an embodiment of the present invention; Figure 11 This is a schematic diagram of the flue gas flow direction in an embodiment of the present invention; Figure 12 This is the Pclog distribution diagram of the initial blockage attribution probability in an embodiment of the present invention. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Explanation of the name: Flue gas flow path characterization: Data were collected at the inlet, middle and outlet sections to characterize the segmented flow state of flue gas in the cold end of the rotary air preheater.

[0021] Local resistance characterization: Data collected at locations within the zone and at adjacent acquisition units are used to characterize the change in flow resistance as flue gas passes through a local area.

[0022] Based on the benchmark dataset and the running dataset, the cold end temperature domain-deposition zone boundary is determined, resulting in multiple deposition zone units. The differences between normal operating conditions and the operating conditions to be identified within the same spatial range in terms of metal temperature, flue gas flow path characterization, and local resistance characterization are jointly determined to establish the cold end temperature domain-deposition zone boundary. Multiple deposition zone units with common deposition determination meanings are enclosed by the cold end temperature domain-deposition zone boundary.

[0023] Deviation and coupling relationships of each characterization relative to normal operating conditions: The progressive relationships obtained by comparing the metal temperature offset, flue gas flow path change, and local resistance offset with the corresponding positions under normal operating conditions within the same deposition partition unit, and the correlation relationships obtained by jointly calculating the consistency of the change direction, the correspondence of the change amplitude, and the change order along the flue gas flow direction of the metal temperature offset, flue gas flow path change, and local resistance offset.

[0024] Regional sedimentary characterization: Local cohesive sediments formed by merging deviation relation quantities, coupling relation quantities, and comprehensive sedimentary quantities according to the same sedimentary zoning unit are included in the state characterization.

[0025] Zoning Status Table: This table is formed by merging metal temperature offset, flue gas path change, local resistance offset, and zoning depositional characterization values ​​according to the correspondence of the same depositional zoning unit and summarizing them in the order of the depositional zoning units. It is used for the calculation of the TabM zoning assignment model.

[0026] Latent variables of zonal depositional state: The TabM zonal assignment model maps non-measurable depositional entry state quantities based on the metal temperature offset, flue gas path change, local resistance offset, and zonal depositional characterization quantities in the zonal state table.

[0027] TabM partitioning assignment model with sedimentary partitioning units as the determination units: Each partitioning status record in the partitioning status table is grouped, merged, and assigned status according to sedimentary partitioning units to output the corresponding partitioning status label of the TabM model.

[0028] The zoning status label meets the initial plugging condition: the sedimentary zoning unit with the zoning status label of initial plugging, or the sedimentary zoning unit adjacent to the sedimentary zoning unit with the zoning status label of initial plugging on the cold end temperature domain-sedimentary zoning boundary and with the zoning status label of transition.

[0029] Existing technologies for identifying initial cold-end blockage in air preheaters often rely on single-quantity changes in the entire unit or fixed zones as criteria. This fails to reflect the localized characteristics of the initial cold-end deposition stage. Furthermore, fixed zone boundaries are difficult to adapt to different operating conditions, and there is a lack of joint characterization of multi-factor relationships. The distinction between initial blockage and transitional states is unstable, ultimately relying on manual inspection to locate specific sectors. This invention provides a TabM-based method for identifying initial cold-end blockage in rotary air preheaters. Figure 1 As shown, it includes: The metal temperature, flue gas flow path characterization, and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under the operating conditions to be identified are obtained to determine the cold end temperature range-deposition zone boundary and obtain the deposition zone unit. Extract the metal temperature shift, flue gas flow path change, and local resistance shift in the sedimentary zoning unit to form zoning sedimentary characterization quantities, and merge them according to the same sedimentary zoning unit to form a zoning state table; Input the partition status table into the TabM partition attribution model, perform attribution calculation, and obtain the partition status label; Initial plugging is determined based on the zoning status label and the cold end temperature range-deposition zoning boundary. Deposition zoning units whose zoning status labels meet the initial plugging conditions are identified as initial plugging sectors.

[0030] This method simultaneously introduces the differences in metal temperature, flue gas flow path characterization, and local resistance characterization within the corresponding spatial range of normal operating conditions and operating conditions to be identified, jointly determines the boundary of cold-end temperature zone depositional zoning, and merges them into depositional zoning units with common depositional determination meaning.

[0031] The present invention will be further explained and described below with reference to the accompanying drawings.

[0032] A TabM-based method for identifying initial blockage at the cold end of a rotary air preheater, such as... Figure 2 As shown, it includes the following steps: S1: Obtain the metal temperature, flue gas flow path characterization, and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions, as well as the corresponding metal temperature, flue gas flow path characterization, and local resistance characterization under the operating conditions to be identified. Specifically, such as Figure 3 As shown, the collection units are defined according to the circumferential position of the cold end of the rotary air preheater and the direction of flue gas flow. Within each collection unit, the metal temperature collection position, the flue gas flow path characterization collection position, and the local resistance characterization collection position are set. Under normal operating conditions, the metal temperature of each acquisition unit is collected at its location within the acquisition zone, along the flue gas flow direction, and at its edge. The flue gas flow path characterization of the inlet section, middle section, and outlet section is collected, and the local resistance characterization of the location within the acquisition zone and the location of adjacent acquisition units is collected to form corresponding data under normal operating conditions. For each acquisition unit, the metal temperature at the location within the area, along the flue gas flow direction, and at the edge location are collected under the operating condition to be identified. The flue gas flow path characterization of the inlet section, middle section, and outlet section is collected. The local resistance characterization of the location within the area and the location of adjacent acquisition units is collected to form the corresponding data for the operating condition to be identified. The data corresponding to normal operating conditions and the data corresponding to the operating conditions to be identified are matched in the same acquisition unit to form the original input used to determine the boundary between the cold end temperature domain and the deposition zone, as well as to extract the metal temperature offset, the change in flue gas flow path, and the local resistance offset.

[0033] S2: Based on the metal temperature, flue gas flow path characterization and local resistance characterization under normal operating conditions, as well as the corresponding metal temperature, flue gas flow path characterization and local resistance characterization under the operating conditions to be identified, the cold end temperature domain-deposition zone boundary is determined, and multiple deposition zone units are obtained. Specifically, such as Figure 4 As shown, the cold end of the rotary air preheater is divided into multiple candidate regions according to the circumferential position and the direction of flue gas flow. The metal temperature, flue gas flow path and local resistance under normal operating conditions, as well as the corresponding metal temperature, flue gas flow path and local resistance under the operating conditions to be identified, are mapped to each candidate region, so that each candidate region covers the metal temperature, flue gas flow path and local resistance within the same spatial range. The metal temperatures at the intra-regional position, along the flue gas flow direction, and edge position in each candidate region are compared and calculated to obtain the intra-regional metal temperature difference, the metal temperature difference along the flue gas flow direction, and the edge metal temperature difference, and are arranged according to the circumferential position and the flue gas flow direction to form a metal temperature difference sequence. The flue gas flow path characteristics of the inlet, middle and outlet sections in each candidate region are compared and calculated to obtain the differences in the inlet section, middle section and outlet sections respectively, and arranged according to the circumferential position and flue gas flow direction to form a flue gas flow path characteristic difference sequence. The local resistance characteristics of the intra-regional location and the adjacent candidate region location in each candidate region are compared and calculated to obtain the differences in local resistance characteristics within the region and the differences in local resistance characteristics between adjacent candidate regions. These differences are then arranged according to the circumferential location and the direction of flue gas flow to form a sequence of local resistance characteristic differences. Based on the joint determination of the direction, magnitude and continuous interval of the changes in the metal temperature difference sequence, flue gas flow path characterization difference sequence and local resistance characterization difference sequence between adjacent candidate regions, candidate boundary positions where the change direction changes and the change magnitude reaches the set boundary threshold are selected. The candidate boundary positions in the circumferential direction and the candidate boundary positions in the flue gas flow direction are intersected, and the intersection position where the metal temperature difference sequence, the flue gas flow path characterization difference sequence and the local resistance characterization difference sequence simultaneously satisfy the set boundary threshold is determined as the cold end temperature domain-deposition zone boundary, thus obtaining the zone candidate body enclosed by the cold end temperature domain-deposition zone boundary. Continuous candidate regions in the partition candidate body whose metal temperature difference sequence, flue gas flow path characterization difference sequence, and local resistance characterization difference sequence change in the same direction are grouped into sedimentation partition units, so that each sedimentation partition unit corresponds to the same sedimentation judgment meaning. The sedimentation partition unit is used as the partitioning object for extracting metal temperature offset, flue gas flow path change and local resistance offset, and as the judgment unit for forming the partition status table and TabM partitioning model.

[0034] S3: For each depositional unit, extract the metal temperature offset, flue gas flow path variation, and local resistance offset from the metal temperature, flue gas flow path characterization, and local resistance characterization under normal and identified conditions. Calculate the deviation and coupling relationship between the metal temperature offset, flue gas flow path variation, and local resistance offset relative to the normal conditions to form the depositional characterization parameters for the zone. Specifically, such as Figure 5 As shown, the metal temperature corresponding to the normal operating conditions and the operating conditions to be identified in each deposition partition unit is extracted according to the position in the zone, the position along the flue gas flow direction, and the edge position. The difference at the same position is calculated, and the average offset in the zone, the offset along the flue gas flow direction, and the edge offset are combined to form the metal temperature offset. The flue gas flow path characteristics under normal and unidentified conditions within each sedimentation partition unit are extracted by inlet, middle and outlet sections. The differences between the corresponding positions are calculated, and the changes in the inlet section, middle section and outlet section are combined to form the flue gas flow path change. The local resistance characterization corresponding to the normal operating conditions and the operating conditions to be identified in each sedimentary partition unit is extracted according to the location within the zone and the location of adjacent sedimentary partition units. The difference between the corresponding locations is calculated, and the resistance offset within the zone, the resistance difference between adjacent sedimentary partition units, and the resistance increase are combined to form the local resistance offset. The metal temperature offset, flue gas flow path change, and local resistance offset are correlated with the metal temperature, flue gas flow path, and local resistance characteristics at the corresponding locations under normal operating conditions. The offset trend from the location within the zone to the edge location, the trend from the inlet section to the outlet section, and the resistance trend from the location within the zone to the adjacent sedimentation unit are obtained respectively. The offset trend, trend, and resistance trend are then merged to form the deviation relationship. The metal temperature offset, flue gas flow path change, and local resistance offset are arranged according to their positions within the same depositional unit, along the flue gas flow direction, and at the edge. The consistency of the change direction, the correspondence of the change amplitude, and the change order along the flue gas flow direction are calculated to obtain their mutual coupling relationship. The deviation relationship and the mutual coupling relationship are merged, the deviation relationship quantity, the coupling relationship quantity and the comprehensive sedimentary quantity are calculated, and the deviation relationship quantity, the coupling relationship quantity and the comprehensive sedimentary quantity are combined to form the regional sedimentary characterization quantity; The metal temperature offset, flue gas flow path variation, local resistance offset, and zonal deposition characterization are grouped and arranged according to the same depositional zonal unit, so that the metal temperature offset, flue gas flow path variation, local resistance offset, and zonal deposition characterization correspond to one of the input groups in the grouping input layer of the TabM zonal attribution model.

[0035] When combining deviation relation quantity, coupling relation quantity, and comprehensive sedimentary quantity to form a regional sedimentary characterization quantity, the edge offset, outlet section change, and resistance increase in the same sedimentary zone unit are correspondingly determined; when the edge offset, outlet section change, and resistance increase satisfy the consistency of change direction and the correspondence of change amplitude, the comprehensive sedimentary quantity is determined based on the deviation relation quantity and coupling relation quantity, and the deviation relation quantity, coupling relation quantity, and comprehensive sedimentary quantity are combined to form a regional sedimentary characterization quantity; S4: The metal temperature offset, flue gas flow path change, local resistance offset, and zonal deposition characterization are merged according to the same depositional zonal unit to form a zonal status table; Specifically, such as Figure 6 As shown, the merging range of each sedimentary zone unit is determined based on the cold end temperature range-deposition zone boundary, and the metal temperature offset, flue gas flow path change, local resistance offset and zone sedimentation characterization are extracted within the merging range. Within the merging range, the metal temperature offsets are arranged in a fixed order of average offset within the zone, offset along the flue gas flow direction, and edge offset to form a metal temperature input group, and a correspondence is established between the metal temperature input group and the deposition partition unit. Within the merging scope, the changes in flue gas flow path are arranged in a fixed order of changes in the inlet section, the middle section, and the outlet section to form a flue gas flow path input group, and a correspondence is established between the flue gas flow path input group and the sedimentation zoning unit. Within the merging range, the local resistance offsets are arranged in a fixed order of resistance offset within the region, resistance difference between adjacent sedimentary partition units, and resistance increase to form a local resistance input group, and a correspondence is established between the local resistance input group and the sedimentary partition unit. Within the merging scope, the regional sedimentary characterization quantities are arranged in a fixed order of deviation relation quantity, coupling relation quantity, and comprehensive sediment quantity to form a regional sedimentary input group, and a correspondence is established between the regional sedimentary input group and the sedimentary regional unit; The metal temperature input group, flue gas flow path input group, local resistance input group, and zoned deposition input group are horizontally merged according to the same depositional zone unit to form a zoned state record. The metal temperature input group, flue gas flow path input group, local resistance input group, and zoned deposition input group are respectively mapped to the corresponding input groups in the grouping input layer of the TabM zone affiliation model. The status records of each partition are vertically summarized according to the order of the sedimentary partition units in the cold end temperature range-sedimentary partition boundary to form a partition status table, and each partition status record is used as the input object of a single sedimentary partition unit received by the merge and fusion layer in the TabM partition attribution model.

[0036] S5: Input the partition status table into the TabM partitioning assignment model with sedimentary partitioning units as the decision units, calculate the assignment of the latent variables of partition sedimentary status, and obtain the partition status label. Specifically, such as Figure 7 As shown, the status records of each partition are extracted according to the partition status table, and the input order is determined according to the arrangement order of the sedimentary partition units determined by the cold end temperature range-deposition partition boundary, so that each partition status record corresponds to a unique sedimentary partition unit before being input into the TabM partition affiliation model. The metal temperature input group in the partition state record is input into the group input layer of the TabM partition attribution model. The average offset within the partition, the offset along the flue gas flow direction and the edge offset are mapped within the group to form a metal temperature group representation that characterizes the temperature entry state of the same deposition partition unit. The flue gas flow path input group in the partition state record is input into the group input layer, and the changes in the inlet section, the middle section and the outlet section are mapped within the group to form a flue gas flow path group representation that characterizes the flow change state of the same sedimentary partition unit. The local resistance input group in the partition state record is input into the group input layer. The resistance offset within the region, the resistance difference between adjacent sedimentary partition units and the resistance increase are mapped within the group to form a local resistance group representation that characterizes the local flow resistance change state of the same sedimentary partition unit. The partitioned sedimentary input group in the partitioned state record is input into the grouping input layer. The deviation relation quantity, coupling relation quantity and comprehensive sediment quantity are mapped within the group to form a partitioned sedimentary group representation that characterizes the sedimentary linkage state of the same sedimentary partition unit. The partitioned sedimentary group representation is determined as the independent input of the merging and fusion layer. The metal temperature group, flue gas flow path group, local resistance group, and partitioned deposition group are input into the merging and fusion layer for merging to form a partitioned fusion representation. The partitioned fusion representation is then input into the TabM backbone layer to calculate the assignment of latent variables of partitioned deposition state and obtain the state assignment value. The state attribution value is input into the state attribution layer to form the normal state attribution value, the transitional state attribution value, and the initial blockage state attribution value. The state corresponding to the maximum value among the normal state attribution value, the transitional state attribution value, and the initial blockage state attribution value is determined as the partition state label, so that the partition state label corresponds one-to-one with the deposition partition unit.

[0037] When the partitioned deposition input group is input into the grouped input layer, the number of neurons corresponding to the partitioned deposition input group is determined to be greater than the number of neurons corresponding to the metal temperature input group, flue gas flow path input group and local resistance input group. The resulting partitioned deposition group is represented as an independent input of the merging and fusion layer and participates in the TabM backbone layer's calculation of the latent variables of the partitioned deposition state. Before determining the state corresponding to the maximum value among the normal state attribution value, transition state attribution value, and initial congestion state attribution value as the zone state label, the difference between the initial congestion state attribution value and the transition state attribution value is judged. When the initial congestion state attribution value is the maximum value and the difference between the initial congestion state attribution value and the transition state attribution value reaches the set judgment threshold, the zone state label is determined as initial congestion. When the initial congestion state attribution value is the maximum value and the difference between the initial congestion state attribution value and the transition state attribution value does not reach the set judgment threshold, the zone state label is determined as transition.

[0038] S6: Based on the partition status label and the cold end temperature range-deposition partition boundary, the initial plugging is determined, and the depositional partition unit whose partition status label meets the initial plugging condition is identified as the initial plugging sector.

[0039] Specifically, such as Figure 8 As shown, the partition status labels obtained from the TabM partitioning model are received, and the circumferential position and flue gas flow direction of each sedimentation partition unit are determined according to the cold end temperature range-deposition partition boundary. The partition status labels are then matched one-to-one with the sedimentation partition units. Depositional zoning units with the zoning status label of initial plugging are identified as initial plugging units, and depositional zoning units that are adjacent to initial plugging units on the cold end temperature domain-depositional zoning boundary and whose zoning status label is transitional are judged to meet the initial plugging conditions. The initial plugging unit and the sedimentary partition unit that meets the initial plugging condition are connected and merged according to the condition that they are circumferentially continuous and located in the same flue gas flow direction interval to form the initial plugging area; The initial blockage area is mapped to the sector range of the cold end of the rotary air preheater, and the sector range containing the initial blockage area is defined as the initial blockage sector.

[0040] In summary, under continuous operation conditions at the cold end of a rotary air preheater, this method constructs adaptive temperature-domain deposition zones based on collectable metal temperature information and signals reflecting changes in flue gas flow and local resistance. It then assigns these zones to their corresponding states, enabling early identification and direct location of initial cold-end blockages within the corresponding sector, supporting operational and maintenance decisions. By simultaneously introducing differences in metal temperature, flue gas flow path characterization, and local resistance characterization within the corresponding spatial ranges of normal and unidentified operating conditions, the method jointly determines the boundaries of cold-end temperature-domain deposition zones and merges them into deposition zone units with shared deposition determination meaning. This design eliminates reliance on preset fixed zones or uniform thresholds for the entire system, instead allowing the determination units to adaptively form spatial boundaries based on temperature changes and flow shifts under operating conditions. This incorporates the spatial non-uniformity of local viscous deposition in the early stages of determination, reducing the risk of missing local anomalies when the overall signal is not yet significant, and providing consistent spatial constraints for subsequent state assignment and sector location. Secondly, under the condition of only having on-site data on metal temperature, segmented flow state, and local flow resistance changes, this method calculates the progressive deviation relationship and mutual coupling relationship between metal temperature offset, flue gas flow path change, and local resistance offset within the same sedimentary unit. This further forms a zonal sedimentary characterization quantity that includes deviation relationship quantities, coupling relationship quantities, and comprehensive sedimentation quantity. Specifically, it determines the corresponding relationship between edge offset, outlet section change, and resistance increase, ensuring that the comprehensive sedimentation quantity is enhanced when both direction and amplitude are consistent. Mechanistically, it explicitly solidifies the linkage between sedimentation at the temperature boundary and the flow end and resistance amplification as a key intermediate quantity. Compared to existing algorithms that use a single pressure drop or single-point temperature trend as a criterion, this proposal transforms the source of uncertainty from univariate fluctuations to a joint constraint of multi-source consistency and sequence consistency, making the zonal characterization of the sedimentation entry state closer to the actual evolution path of early viscous sedimentation. Finally, this method inputs temperature, flow path, resistance, and zoned deposition groups into the model in groups, and increases the mapping capacity of the zoned deposition input group. This allows the latent variables of deposition in the deposition zone units to be used for normal, transitional, and initial blockage calculations after multi-source information fusion. Simultaneously, a difference threshold constraint is introduced between the initial blockage and transitional assignment values ​​to suppress label drift under ambiguous boundary conditions. Furthermore, by combining the adjacency relationship and connectivity merging rules of the cold-end temperature domain deposition zone boundary, the initial blockage label and its adjacent transitional units are formed into an initial blockage region, which is then mapped to the equipment sector range to output the initial blockage sector. This link enables a closed-loop delivery of the core technical problem addressed by this invention: achieving locatable sector-level positioning of initial blockages at the cold end in continuous operation scenarios, thereby supporting targeted treatment rather than manual post-event search.

[0041] The method will be further explained below with reference to specific embodiments.

[0042] like Figure 9As shown, this invention demonstrates the closed-loop effect of locating initial blockages at the cold end of a rotary air preheater. The left side shows a data collection grid expanded circumferentially × flue gas flow direction at the cold end. Based on the combined differences in metal temperature, flue gas flow path characteristics, and local resistance characteristics under normal and identified operating conditions, a temperature domain-deposition zone boundary is adaptively generated, and state assignment is completed within each zone unit. Red indicates a zone unit determined to be initially blocked, and orange indicates a transition unit adjacent to the initial blockage unit boundary and satisfying the inclusion rules; these are connected and merged to form an initial blockage region. The right side maps this initial blockage region to equipment structure sectors, outputting the executable initial blockage sector location. Compared to whole-machine thresholds or fixed zone methods, this invention's zone boundary adapts to operating conditions, and the joint constraints of multi-source information improve early identification stability. The results are directly assigned to sectors, supporting targeted soot blowing and maintenance, reducing missed detections and manual search time.

[0043] In this embodiment, step S1 specifically includes: During implementation, the cold end of the rotary air preheater is first divided into a collection unit grid according to its circumferential position and the direction of flue gas flow. The collection unit is denoted as... ,in, Indicates the circumferential position index. Indicates the number of circumferential acquisition units. Indicates the direction index of the smoke flow. This indicates the number of data collection units representing the direction of flue gas flow. Each data collection unit... The system includes fixed locations for metal temperature sampling within the designated area, along the flue gas flow direction, and at the edge. It also includes fixed locations for sampling representing the flue gas flow path at the inlet, middle, and outlet sections. Additionally, it includes fixed locations for representing local resistance within the designated area and locations of adjacent sampling units. The positions of adjacent sampling units are uniquely determined based on the principle of sharing a boundary and minimizing the center-to-center distance. Each sampling location outputs a scalar sample value on a time index. The three scalar sample values ​​from the inlet, middle, and outlet sections collectively represent the segmented flow state of the flue gas within the cold end of the rotary air preheater. The two scalar sample values ​​from the location within the designated area and the location of the adjacent sampling unit collectively represent the flow resistance changes as the flue gas passes through local areas.

[0044] Each data collection location generates an original timestamped sequence. ,in, Represents any collected field. Representation field The Each sampling time, Representation field In the Sampled values ​​at each sampling time, Representation field The original number of sampling points. Map all collected fields to a unified time axis. ,in, Indicates the start time of identification. Indicates a uniform sampling period. Indicates a unified time index. This represents the number of valid time indices within a unified time axis. The mapping uses a nearest neighbor matching rule and satisfies... ,in, Representation field The original sampling time and the unified time axis time Time difference, This indicates the allowable time deviation window. Only eight fields have valid sampled values ​​for time indexing: metal temperature within the zone, metal temperature along the flue gas flow direction, metal temperature at the edge, flue gas flow path characterization at the inlet section, flue gas flow path characterization in the middle section, flue gas flow path characterization at the outlet section, local resistance characterization within the zone, and local resistance characterization at adjacent acquisition unit locations. Generate a record above.

[0045] Under normal operating conditions, in each data acquisition unit Each valid time index Above, the metal temperature at the location within the zone, the metal temperature at the location along the flue gas flow direction, and the metal temperature at the edge location are arranged in a fixed order to form a three-dimensional metal temperature vector. The inlet section flue gas flow path representation, the middle section flue gas flow path representation, and the outlet section flue gas flow path representation are arranged in a fixed order to form a three-dimensional flue gas flow path representation vector. The local resistance characterization within the region and the local resistance characterization of adjacent acquisition units are arranged in a fixed order to form a two-dimensional local resistance characterization vector. Superscript This indicates normal operating conditions. , and By concatenating the data in a fixed field order, an eight-dimensional normal operating condition record vector is formed. Under the conditions to be identified, a three-dimensional metal temperature vector is formed by using completely consistent acquisition units, acquisition locations, a unified time axis, and field order. 3D smoke flow path representation vector Two-dimensional local resistance characterization vector and eight-dimensional working condition record vector to be identified Superscript This indicates the operating condition to be identified. (All) according to , , After sorting, all records in the corresponding benchmark dataset are included. according to , , The sorted data corresponds to the records in the dataset.

[0046] Same acquisition unit Same time index Eight-dimensional normal operating condition recording vector With the eight-dimensional working condition record vector to be identified One-to-one binding is performed to form a sixteen-dimensional pair vector. Each acquisition unit corresponds to a sixteen-dimensional paired vector sequence. Sixteen-dimensional pairing vectors The first eight dimensions are, in order: metal temperature at the location within the zone under normal operating conditions, metal temperature at the location along the flue gas flow direction, metal temperature at the edge location, characterization of the flue gas flow path at the inlet section, characterization of the flue gas flow path in the middle section, characterization of the flue gas flow path at the outlet section, characterization of the local resistance at the location within the zone, and characterization of the local resistance at the location of adjacent acquisition units. These are sixteen paired vectors. The last eight dimensions are the corresponding fields under the working conditions to be identified. The determination of the cold end temperature domain-depositional zone boundary directly reads the three types of metal temperature fields, the three types of flue gas flow path characterization fields, and the two types of local resistance characterization fields from the sixteen-dimensional paired vector sequence, and expands the candidate region according to the acquisition unit grid; the extraction of metal temperature offset, flue gas flow path change, and local resistance offset directly uses the sixteen-dimensional paired vector sequence as input; after the sixteen-dimensional paired vector sequences belonging to the same depositional zone unit are merged, they are further formed into three-dimensional inputs of metal temperature offset, flue gas flow path change, local resistance offset, and zone depositional characterization, which in turn form the twelve-dimensional depositional zone unit input received by the TabM zone attribution model.

[0047] In this embodiment, step S2 specifically includes: During implementation, it will be integrated with the data acquisition unit. The spatial regions with one-to-one correspondence are denoted as candidate regions. ,in, Indicates the circumferential position index. Indicates the direction index of the smoke flow. Each candidate region Coverage and Acquisition Unit Same spatial range, and bound recognition window The sixteen-dimensional paired vector sequence within . Indicates the starting index of the recognition window. Indicates the length of the recognition window. Sixteen-dimensional pairing vector. The first eight dimensions correspond, in order, to the metal temperature at the location within the zone under normal operating conditions, the metal temperature at the location along the flue gas flow direction, the metal temperature at the edge location, the flue gas flow path representation at the inlet section, the flue gas flow path representation at the middle section, the flue gas flow path representation at the outlet section, the local resistance representation at the location within the zone, and the local resistance representation at the location of adjacent acquisition units. The latter eight dimensions correspond, in order, to the corresponding fields under the operating conditions to be identified. This makes each candidate region... It simultaneously covers the corresponding observations of normal operating conditions and operating conditions to be identified within the same spatial range.

[0048] For each candidate region The three types of fields within the area are compared and calculated separately. For the metal temperature at the location within the zone, the metal temperature at the location along the flue gas flow direction, and the metal temperature at the edge location, the signed difference between the value of the field to be identified and the value of the field under normal operating conditions is first calculated at each time step within the identification window. Then, the signed difference is divided by the difference between the maximum and minimum values ​​of the same field under normal operating conditions within the identification window. When the difference between the maximum and minimum values ​​is zero, a preset stable lower limit is used instead of the denominator. Subsequently, the dimensionless results of all time indices within the identification window are averaged to form a three-dimensional metal temperature difference record. The three parameters correspond to the metal temperature difference within the zone, the metal temperature difference along the flue gas flow direction, and the edge metal temperature difference, respectively. The same processing order is applied to the flue gas flow path characterization of the inlet section, the middle section, and the outlet section, forming a three-dimensional flue gas flow path characterization difference record. The three items correspond to the differences in the inlet section, middle section, and outlet section, respectively. The same processing order is applied to the local resistance characterization within the area and the local resistance characterization of adjacent acquisition units, forming a two-dimensional record of local resistance characterization differences. The two items correspond to the differences in local resistance characterization within the region and the differences in local resistance characterization between adjacent candidate regions, respectively. For a fixed flue gas flow direction index... according to The sequences are arranged in ascending order to form a series of metal temperature differences, flue gas flow path characteristic differences, and local resistance characteristic differences at circumferential positions; a fixed circumferential position index is used. according to The sequences are arranged in ascending order to form a sequence of metal temperature differences along the flue gas flow direction, a sequence of differences in flue gas flow path characteristics, and a sequence of differences in local resistance characteristics.

[0049] The boundary threshold is set as . The difference between corresponding fields of all adjacent candidate regions under normal operating conditions is determined. Specifically, the difference between regions is calculated for the following: metal temperature within the region, metal temperature along the flue gas flow direction, metal temperature at the edge, flue gas flow path representation at the inlet section, flue gas flow path representation at the middle section, flue gas flow path representation at the outlet section, local resistance representation within the region, and local resistance representation at adjacent acquisition units in all adjacent candidate regions at the circumferential and flue gas flow directions. The same dimensionless processing and grouped averaging processing as used for candidate region difference records are applied. All joint calculation results are arranged in ascending order of value, and the 95th percentile is taken as the threshold. The length of a continuous interval is denoted as . , Counting based on the number of consecutive candidate regions, with a minimum of two values. For each candidate region, extract the dominant direction and dominant amplitude from the three types of difference records. The dominant direction is defined as the sign of the largest absolute value component in the corresponding difference record, and the dominant amplitude is defined as the absolute value of the largest absolute value component in the corresponding difference record. Direction stability is defined as the dominant direction maintaining a stable position within a given length. It remains unchanged within the continuous candidate region.

[0050] In the circumferential position, for adjacent candidate regions and Perform joint calculations, where, , .when one side and One side is in length of When the directional stability is satisfied within a continuous candidate region, and the dominant directions of the three types of difference records switch on both sides of the boundary, the following formula is used to calculate the candidate boundary position determination value of the circumferential position. :

[0051] in, Indicates that the candidate region is located in the circumferential direction. With candidate regions The judgment value for whether the position between them meets the conditions for generating candidate boundary positions; This represents an indicator function; it takes the value of one when the condition inside the parentheses is true, and takes the value of zero when the condition inside the parentheses is false. Indicates candidate region Component values ​​in the metal temperature difference record; These correspond to the metal temperature differences within the zone, the metal temperature differences along the flue gas flow direction, and the metal temperature differences at the edge, respectively. Indicates candidate region Component values ​​in the record of differences in the flue gas flow path; These correspond to differences in the inlet segment, middle segment, and outlet segment, respectively. Indicates candidate region Component values ​​in the record of differences in local resistance characterization; These correspond to the differences in local resistance characterization within the region and the differences in local resistance characterization between adjacent candidate regions, respectively. This indicates the setting of a boundary threshold. The records of metal temperature differences, flue gas path characterization differences, and local resistance characterization differences have all undergone dimensionless processing, and the weighted grouped averages in the above formula can be directly compared. When At that time, and Candidate boundary positions are generated in the circumferential direction. Adjacent candidate regions are checked along the direction of flue gas flow. and At the same time, using the same fields, the same group averaging method, and the same threshold, candidate boundary position determination values ​​for the flue gas flow direction are generated. ;when At that time, and Candidate boundary positions for the direction of flue gas flow are generated between them.

[0052] Candidate boundary positions with a value of 1 for the circumferential position and candidate boundary positions with a value of 1 for the flue gas flow direction are located to the candidate region grid boundary. If a single grid node is connected to at least one candidate boundary position with a value of 1 for the circumferential position and at least one candidate boundary position with a value of 1 for the flue gas flow direction, then that grid node is designated as the cold-end temperature zone-sedimentary zone boundary node. All cold-end temperature zone-sedimentary zone boundary nodes are connected sequentially according to their grid adjacency relationships to form the cold-end temperature zone-sedimentary zone boundary. From the cold-end temperature zone to the boundary of the sedimentary zone. The enclosed region is denoted as a partition candidate. ,in, Indicates the partition candidate body index. This indicates the number of partition candidates.

[0053] In each partition candidate Within the framework, continuous candidate regions are merged using the four adjacency relationships of the shared complete boundary: the side facing upwards, the side facing downwards, the side facing upwards in the direction of flue gas flow, and the side facing downwards in the direction of flue gas flow. Starting from unassigned candidate regions, a current merge set is established. Regions adjacent to the boundary of the current merge set that share the dominant direction of metal temperature difference records, flue gas flow path characterization difference records, and local resistance characterization difference records, and whose dominant amplitude differences for these three types of difference records are less than [a certain value], are merged into a single set. Candidate regions are merged into the current merge set until no new candidate regions meet the conditions, thus forming a sedimentary partition unit. All sedimentary partition units are denoted as ,in, This indicates the number of sedimentary partition units. Each sedimentary partition unit... Corresponding to a subset of the collection unit index Collection Unit Index Subset Each element in the array is a two-dimensional index pair. The sedimentary partition units are arranged in order of priority based on circumferential location index and flue gas flow direction index. Subsequently, each sedimentary partition unit This constitutes a fixed spatial merging range; each spatial merging range corresponds to a generated object of a partition state record, and also corresponds to a spatial constraint range of a twelve-dimensional sedimentation partition unit input.

[0054] In this embodiment, step S3 specifically includes: For each sedimentary partition unit According to sedimentary zoning units Corresponding collection unit index subset Extracting the 16-dimensional paired vector sequence For fields with the same name in the same location, the time index satisfies... ,in, Indicates the starting index of the recognition window. This indicates the length of the recognition window. The metal temperature at locations within the area, along the flue gas flow direction, and at the edge are respectively... The values ​​of the normal operating condition field and the field value to be identified are averaged over time and spatially, and the mean of the operating condition to be identified is subtracted from the mean of the normal operating condition; the normalized scale is taken from the field with the same name in the normal operating condition. The difference between the maximum and minimum values ​​within the range is considered when the normalized scale is less than the preset stability lower limit. At that time, with Instead of a normalized scale, the average offset within the area is obtained according to the same rules. , deflected along the direction of smoke flow and edge offset And constitute the metal temperature offset The same processing order was used to characterize the flue gas flow path in the inlet section, the middle section, and the outlet section to obtain the change in the inlet section. Change in the middle section and changes in the export section And constitute the change in the path of the flue gas flow. .Will Acquisition units that are in contact with the boundary of sedimentary zoning units constitute a subset of boundary acquisition units. These subsets include acquisition units that share a complete boundary but do not belong to that subset. The positions of adjacent acquisition units follow the unique determination rule used when the acquisition units were defined; for The local resistance characterization field within the inner region and The local resistance characterization fields of adjacent acquisition units pointing inward to adjacent sedimentary zoning units are subjected to time and spatial averaging, and the intra-regional resistance offset is obtained according to the same normalization rule. Resistance difference between adjacent sedimentary partition units Then Recorded as resistance increase Composed of local resistance offset Metal temperature offset Changes in the path of flue gas flow and local resistance offset All nine components are dimensionless values ​​that can be directly compared and calculated.

[0055] The mean values ​​used to calculate the above offset or variation components under normal operating conditions are arranged in a fixed order to form a reference temperature vector. , reference flow path vector and reference resistance vector . , , , , , , and These represent the time and spatial average results of the corresponding fields under normal operating conditions, respectively. A threshold for location variation is set. For any comparison difference, the difference is greater than... Recorded as positive, the difference is less than The opposite is recorded as the difference falling within the interval. This is denoted as horizontal. (The rest is missing.) and Compare the orientation states, and then... and The directional states are compared, and the number of coincidences is divided by two to obtain the offset variation relationship value. .Will and Compare the orientation states, and then... and The directional states are compared, and the number of consistent values ​​is divided by two to obtain the value of the changing relationship. .Will and Compare the orientation states, and then... and By comparing the directional states and dividing the number of coincidences by two, we obtain the resistance variation relationship value. .Will This is denoted as a deviation relation, and... , and The arithmetic mean is denoted as the deviation from the relation. .

[0056] The average offset within the zone, the change in the entrance segment, and the resistance offset within the zone are mapped to the first position group. The shift along the flue gas flow direction, the variation in the middle section, and the resistance difference between adjacent sedimentary units are corresponding to the second location group. The edge offset, the change in the exit section, and the increase in resistance are mapped to the third position group. Set the threshold corresponding to the change amplitude. For each component within each location group, the component value is compared to zero and combined with the location change threshold. Determine the orientation state; when all non-horizontal orientations within a position group are consistent, that position group is considered to have consistent orientation. Divide the number of position groups with consistent orientations among the three position groups by three to obtain the consistency value of the changing direction. For each location group, the absolute values ​​of the three components are normalized using the largest absolute value within that location group. If the largest absolute value within that location group is less than... At that time, with Replace the denominator; after normalization, compare the difference between the maximum and minimum values. When the difference is not greater than... At that time, the position group is recorded as the amplitude correspondence. The number of amplitude correspondence position groups in the three position groups is divided by three to obtain the amplitude correspondence value. .right , and Record the positions in descending order of the absolute values ​​of the three components, and then... , and The three sets of positional orders are compared, and the number of pairs with the same positional order is divided by three to obtain the change order value along the direction of flue gas flow. .Will Let this be a mutually coupled relationship, and... , and The arithmetic mean is denoted as the coupling quantity. .

[0057] Edge offset Changes in the export section and resistance increase When making the corresponding determination, the total sediment volume Calculate using the following formula:

[0058] In the formula, Represents sedimentary partition units The total amount of sediment; Indicates the sedimentary partition unit index; Indicates the deviation from the relation; Indicates the quantity of coupling relationship; Indicates edge offset; Indicates the change in the export section; Indicates the increase in resistance; Indicates the threshold for positional changes; This indicates the threshold corresponding to the magnitude of the change; This indicates a preset lower limit of stability. This represents an indicative function; it takes the value of one when all conditions within the parentheses are true, and takes the value of zero when any condition within the parentheses is false. This represents the absolute value operation; This indicates taking the maximum value within the parentheses; This indicates taking the minimum value within the parentheses. Because... , , , , , , and All values ​​are dimensionless; the comparisons, normalization, and weighted calculations in the above formula maintain dimensional consistency. When the indicator function is zero, the comprehensive sediment amount... Degenerate into .

[0059] The regional sedimentary characterization value is denoted as The three components represent the deviation relation quantity, the coupling relation quantity, and the overall deposition quantity, respectively. The metal temperature offset is also considered. Changes in the path of flue gas flow Local resistance offset and regional sedimentary characterization According to the same sedimentary partition unit The fixed field order is used to group the data into four input groups: metal temperature, flue gas path, local resistance, and zoned deposition. All four input groups are three-dimensional, and the input vector for a single depositional zone is denoted as... The total dimensions are twelve. Arranged according to the sedimentary partition units... Each record is written to the partition status table, and each record is bound to a deposition partition unit. The TabM partitioning model receives a single input vector. Instead of directly tiling the twelve-dimensional input onto the main layer, it is first split into four three-dimensional input groups: the metal temperature input group enters the metal temperature offset quantum layer and is mapped to an eight-dimensional sub-layer output; the flue gas flow path input group enters the flue gas flow path change quantum layer and is mapped to an eight-dimensional sub-layer output; the local resistance input group enters the local resistance offset quantum layer and is mapped to an eight-dimensional sub-layer output; and the partitioned deposition input group enters the partitioned deposition characterization quantum layer and is mapped to a twelve-dimensional sub-layer output. The four sub-layer outputs are spliced ​​together to form the thirty-six-dimensional merged input corresponding to a single deposition partition unit.

[0060] In this embodiment, step S4 specifically includes: Cold end temperature zone—depositional zone boundary Once determined, the sedimentary partition units will be... Corresponding collection unit index subset The covered spatial extent serves as a sedimentary partition unit. The merging range. A sedimentary partition unit. Each sedimentary partition corresponds to only one merging range, and the merging ranges of different sedimentary partitions do not overlap. For each sedimentary partition... Extracting only those already present in the sedimentary partitioning units within the merging range Metal temperature offset that has been successfully bound Changes in the path of flue gas flow Local resistance offset and regional sedimentary characterization Metal temperature offset Changes in the path of flue gas flow Local resistance offset and regional sedimentary characterization None of them are recombined across sedimentary partition units, and the partition status records maintain a constraint relationship of one record corresponding to one sedimentary partition unit from the source.

[0061] Within the merging range, the metal temperature offset will be... The metal temperature input groups are arranged in a fixed order of average offset within the zone, offset along the flue gas flow direction, and edge offset. The change in the path of the flue gas flow. The flue gas flow path input group is arranged in a fixed order of inlet section variation, middle section variation, and outlet section variation. The local resistance offset Local resistance input groups are arranged in a fixed order based on intra-regional resistance shift, resistance difference between adjacent sedimentary units, and resistance increase. Characterizing the sedimentary features of the partitions The sedimentary input groups of constituent regions are arranged in a fixed order of deviation relation quantity, coupling relation quantity, and comprehensive sedimentary amount. All four input groups are three-dimensional vectors, and the four input groups correspond to sedimentary partitioning units. Using the same index Establish a unique correspondence.

[0062] Will The collection unit with the smallest circumferential position index and the smallest flue gas flow direction index within that smallest circumferential position is designated as the deposition partition unit. The sorting reference acquisition units are used to arrange all sedimentary partition units according to the order of their circumferential position index and flue gas flow direction index. Under this arrangement rule, the metal temperature input group, flue gas flow path input group, local resistance input group, and partition sedimentation input group are horizontally merged according to the same sedimentary partition unit, and all partition status records are vertically summarized according to the order of sedimentary partition units to construct a partition status table.

[0063]

[0064] In the formula, Indicates the sedimentary partition unit index; Indicates the first Each sedimentary partition unit The corresponding partition status record; Indicates the average offset within the region; This indicates a shift along the direction of the smoke flow; Indicates edge offset; Indicates the change in the inlet segment; Indicates the change in the middle section; Indicates the change in the export section; Indicates the resistance offset within the zone; This indicates the resistance difference between adjacent sedimentary partition units; Indicates the increase in resistance; Indicates the deviation from the relation; Indicates the quantity of coupling relationship; Indicates the total sediment volume; Represents the partition status table; Represents the status records of all partitions; Indicates the number of sedimentary partition units. Partition status record. It is a twelve-dimensional vector. The first three levels of fields are fixed to the metal temperature input group, the middle two sets of three-dimensional fields are fixed to the flue gas flow path input group and the local resistance input group, respectively, and the last three levels of fields are fixed to the zoned deposition input group. Because , , , , , , , , , , and All values ​​are dimensionless, and the partition status is recorded. The twelve fields can be written directly in a fixed order, and there is no problem of inconsistent dimensions.

[0065] TabM Partition Attribution Model Based on Partition Status Table Read partition status records line by line in sequence The grouped input layer performs an independent forward computation on each partition state record. Re-split into four input groups. Metal temperature input group. Inputting a metal temperature-shifted quantum layer yields an eight-dimensional sublayer output. ; Flue gas flow path input group The input flue gas flows through a path-changing quantum layer to obtain an eight-dimensional sublayer output. Local resistance input group Inputting a local resistance-shifted quantum layer yields an eight-dimensional sublayer output. ; Partitioned sedimentary input group Input partition deposition characterization quantum layer, obtain twelve-dimensional sublayer output .Will , , and By splicing them together in a fixed order, a 36-dimensional merged vector is formed. Merge and merge vectors As a single deposition partition unit input object received by the merge and fusion layer.

[0066] Merge and merge vectors After inputting into the TabM backbone layer, the input first enters a fully connected structure with 32 neurons in the first layer, and then enters a fully connected structure with 16 neurons in the second layer. The second fully connected structure outputs a 16-dimensional vector. The sixteen components correspond to the output values ​​of the sixteen neurons, forming a sixteen-dimensional vector. That is, the hidden variables of the partitioned deposition state. The state attribution layer receives a sixteen-dimensional vector. It also outputs a three-dimensional state attribution vector. The three components correspond to the state labels of the three zones: normal, transitional, and initial blockage, respectively. (Three-dimensional state attribution vector) The component with the largest median value corresponds to the sedimentary partition unit. The partition status label. The TabM partition attribution model records the partition status. After completing one forward computation, continue processing along the same computation path. to Latent states are not transmitted between different sedimentary partition units. Therefore, the partition state table... Each partition status record Each of them is treated as an independent sedimentary partitioning unit and entered into the TabM partitioning model.

[0067] In this embodiment, step S5 specifically includes: Partition Status Table Expanded into a sequence of partition status records by row ,in, Indicates the number of sedimentary partition units. Represents sedimentary partition units Corresponding partition status record. Partition status record. The twelve components are written sequentially into a metal temperature input group according to fixed field boundaries. Flue gas flow path input group Local resistance input group and partitioned sedimentary input groups Partition status record sequence The input order directly follows the cold-end temperature range-deposition zone boundary. Determine sedimentary partition units The order of arrangement at the time, therefore the state record of each partition. Before inputting the TabM partitioning model, it was already associated with the unique sedimentary partitioning unit. Binding. The TabM partition attribution model uses the finalized model parameters to perform forward inference, with each forward inference operation targeting a twelve-dimensional partition state record. The input format of the entire machine is arranged in a fixed order. A twelve-dimensional vector.

[0068] Record the state of any partition First, within the grouped input layer, four three-dimensional input groups are split according to fixed field boundaries. The metal temperature input group... Input a metal temperature offset quantum layer. The metal temperature offset quantum layer is configured with eight neurons, each receiving signals simultaneously. , and Three input values ​​are used to perform an intragroup mapping according to the parameters stored in this neuron and output a scalar. The eight scalars are arranged in the order of neuron indices to form an eight-dimensional metal temperature group representation. .in, Indicating the first quantum layer of metal temperature shift Each neuron receives a metal temperature input group The output value, Input the flue gas flow path into the group. The input flue gas flow path change quantum layer is configured with eight neurons, each of which controls... , and The same form of intra-group mapping is performed on the three-dimensional input to obtain an eight-dimensional smoke flow path group representation. .in, The quantum layer representing the change in the path of flue gas flow The output value of each neuron. Input local resistance into the group. The input is a local resistance offset quantum layer, which has eight neurons, resulting in an eight-dimensional representation of the local resistance group. .in, Indicating the local resistance shift in the quantum layer, the first The output value of each neuron. Deposit the input group in the partition. The input partitioned deposition characterization quantum layer is configured with twelve neurons. This number of neurons is greater than the eight neurons in the metal temperature offset quantum layer, the flue gas path change quantum layer, and the local resistance offset quantum layer. The twelve neurons respectively... , and The three-dimensional input is mapped within the group to obtain a twelve-dimensional partitioned sedimentary group representation. .in, The partitioned deposition characterization of the quantum layer The output value of each neuron Regional sedimentary groups are represented. Not in the grouped input layer , and Compressed merging, partitioned sedimentary group representation It is used directly as an independent input to the merge and fusion layer.

[0069] Will , , and By splicing them together in a fixed order, a 36-dimensional partitioned fusion representation is formed. Partition fusion representation After the input merging layer, the data enters the TabM backbone layer. The TabM backbone layer consists of two fully connected layers: the first layer has 32 neurons, and the second layer has 16 neurons. The first fully connected layer receives the 36-dimensional partitioned fusion representation. The first layer receives all components and generates a 32-dimensional intermediate representation. The second fully connected structure receives all components of the 32-dimensional intermediate representation and generates a 16-dimensional vector. Sixteen-dimensional vector This involves partitioning and depositing latent state variables. The state attribution layer consists of three neurons, all of which receive a sixteen-dimensional vector. All sixteen components are used to output the normal state assignment value, the transition state assignment value, and the initial blockage state assignment value, forming a three-dimensional state assignment vector. .

[0070] The threshold value is set as follows: . During the model finalization phase, the difference distribution at the state attribution layer output is determined by comparing the state records of manually calibrated transition zones with those of manually calibrated initial blockage zones. A fixed difference value that maximizes the accuracy of distinguishing between transition and initial blockage is then selected. This applies to the zone state records. Partition status label The following rules are used for determination:

[0071] in, Represents sedimentary partition units The partition status label; Indicates the sedimentary partition unit index; Indicates the value attribution to the normal state; Indicates the transition state attribution value; Indicates the initial blockage state attribution value; This indicates that a threshold value has been set. This indicates taking the maximum value within the parentheses. Because... , , and All values ​​are dimensionless values ​​obtained from the state attribution layer output or threshold setting. The size comparison and difference comparison in the formula can be performed directly.

[0072] TabM partition attribution model records partition status sequences Execute the same forward inference path row by row in sequence. Partition state record. After completing one forward inference iteration, record the partition state. to Perform the same calculations sequentially. Partition status record. With partition status record Since hidden states are not shared and recursive state updates are not used, the determination of each sedimentary partition unit is controlled solely by the corresponding partition state record. After all forward reasoning is completed, the sedimentary partition units are obtained. One-to-one correspondence of state-assignment vector sequences and partition status label sequence If sedimentary partition units With sedimentary partition units In the cold end temperature zone—depositional zone boundary If there is a shared boundary segment, then the sedimentary partition unit... Denotes as sedimentary partition units The boundary of adjacent sedimentary partition units. Partition status label. Depositional zoning units for initial plugging Initial congestion conditions met; Zone status label This is a transitional sedimentary partition unit with adjacent boundaries. Partition status label During the initial plugging stage, the sedimentary zoning unit It also satisfies the initial plugging condition. The input to the model thus formed is a twelve-dimensional sequence of state records arranged according to sedimentary partition units. The model output is a sequence of three-dimensional state attribution vectors generated in the same order. With partition status label sequence .

[0073] In this embodiment, step S6 specifically includes: In this processing section, only the partition status label sequence already output by the TabM partition attribution model is used. Cold end temperature zone—depositional zone boundary and each sedimentary partition unit Corresponding collection unit index subset .in, Represents sedimentary partition units Partition status label, This indicates the number of sedimentary partition units. For each sedimentary partition unit... Read All two-dimensional index pairs ,in, Indicates the circumferential position index. This indicates the position index of the direction through which the smoke flows. All The minimum and maximum values ​​are denoted as . and ,Will All The minimum and maximum values ​​are denoted as . and .Will As a sedimentary partition unit The circumferential position range will As a sedimentary partition unit The direction of the smoke flow is defined. This completes the partition status labeling. With sedimentary partition units The spatial binding ensures that each partition status label not only corresponds to a depositional partition unit, but also to a clearly defined circumferential location interval and flue gas flow direction interval. This section no longer calls the TabM partitioning model and performs no new network inference; it only performs spatial determination and region merging on the already obtained partition status labels.

[0074] Partition status label Depositional zoning units for initial plugging Write the initial blocking unit set ,in, This represents the initial blockage unit set. The partition status label... Transitional sedimentary zones are examined one by one as adjacent units. Adjacency determination does not use geometric center distance or empirical sector neighborhood; instead, it is directly based on the cold-end temperature range—sedimentary zone boundary. The boundary contact relationship is determined. If the sedimentary zoning unit... Corresponding collection unit index subset At least one two-dimensional index pair is associated with a certain initial plugging unit. Corresponding collection unit index subset If a two-dimensional index pair shares a complete boundary, then the depositional partition unit is determined. With sedimentary partition units In the cold end temperature zone—depositional zone boundary Upper adjacent. Only when sedimentary partition units Set with initial blockage unit At least one sedimentary partition unit satisfies the adjacency condition, and the partition status label Only during the transition period are sedimentary partition units defined. Write the set of sedimentary partition units that meet the initial plugging conditions. ,in, This represents the set of sedimentary subdivisions that meet the initial plugging conditions. Sedimentary subdivisions with the subdivision status label "transitional" but not directly adjacent to any initial plugging unit are not included. Depositional units with normal partition status labels do not participate in the spatial merging of this segment.

[0075] In obtaining and Afterwards, The sedimentary partition units in the data are used as connectivity merging objects. Connectivity merging is first performed according to the flue gas flow direction interval. Depositional units are grouped, with only those sedimentary subdivisions sharing the exact same flue gas flow direction allowed to join the same merging group. Within the same merging group, sedimentary subdivisions are further grouped according to their circumferential positional range. The starting indices are sorted in ascending order. The first unmerged sedimentary partition unit after sorting is used as the seed unit to establish an initial plugging region, and adjacent sedimentary partition units are checked along the sorting direction. If an adjacent sedimentary partition unit is within the cold-end temperature range—the boundary of the sedimentary partition—it is considered a plugging region. If a shared boundary segment exists, and the endpoint of the circumferential position interval of one sedimentary partition unit is the same as or differs from the starting point of the circumferential position interval of another sedimentary partition unit by one circumferential position index, then the two sedimentary partition units are determined to meet the condition of "circumferential position continuity and located in the same flue gas flow direction interval," and are written into the same initial plugging region. The same check is performed on newly written sedimentary partition units until no new eligible sedimentary partition units appear in the current initial plugging region. Each completed connection result is denoted as... ,in, Indicates the first The initial congestion area, This indicates the index of the initial plugging region. A single initial plugging unit that is not connected to other sedimentary zoning units, or a single sedimentary zoning unit that meets the initial plugging conditions, independently forms an initial plugging region. Even if there are corner contacts between intervals with different flue gas flow directions, no inter-interval merging occurs, thus ensuring that the initial plugging region corresponds to a continuous sedimentary extension zone within the same flue gas flow direction interval.

[0076] The preset sector range of the cold end of the rotary air preheater is denoted as... ,in, Indicates the first The set of acquisition unit indexes corresponding to each sector range Represents the sector index. Each sector range The correspondence between the start and end angles of the equipment sector and the grid of the acquisition unit is predetermined. Specifically, the acquisition unit is assigned by using the method of the circumferential center corner of the acquisition unit entering the start and end angle interval of the sector. For each initial blockage area... The initial congestion area The subsets of acquisition unit indices corresponding to all sedimentary partition units within the region are merged to form the regional acquisition unit index set. ,in, Indicates the initial congestion area The indexes of all covered acquisition units. Compare them one by one. With each sector range Does the collection unit index have an intersection? As long as... With a certain sector range If at least one identical acquisition unit index exists, the initial blockage area will be identified. Mapped to sector range And this sector is defined as the initial blockage sector. If the same initial blockage area... Spanning multiple sector ranges In this case, all sectors where mapping occurs are simultaneously identified as initial blockage sectors, without truncating cross-sector initial blockage areas. Thus, the partition status label first completes the initial blockage determination at the deposition partition unit level, then forms the initial blockage area at the spatial connectivity level, and finally falls into the actual sector range at the equipment structure level.

[0077] Through the above processing, the cold-end temperature zone—depositional zone boundary is determined. The generated sedimentary partition units no longer remain at the internal label level of the model, but are directly converted into localizable initial plugging regions and initial plugging sectors.

[0078] In this way, the initial blockage at the cold end of the rotary air preheater no longer requires a unified judgment of the whole machine followed by manual location. Instead, it completes the spatial positioning according to the order of deposition zoning units, initial blockage area, and initial blockage sector, directly solving the core technical problem that it is difficult to accurately locate the actual sector position from the mixed state of the whole machine when local viscous deposition begins.

[0079] This invention addresses the challenge of timely locating initial blockages at the cold end of rotary air preheaters by employing a closed-loop technical approach: benchmark alignment acquisition, temperature-domain deposition zoning, assignment of latent variables in zoning deposition, and spatial connectivity positioning. In continuous operation scenarios, early changes in cold-end viscous deposition are often masked by load fluctuations, flue gas distribution variations, and local noise at measurement points. This results in altered local flow even before significant shifts in overall pressure drop and temperature, leading to delayed soot blowing decisions and further blockage expansion. This invention, relying solely on available on-site metal temperature observations, flue gas flow path characterization at the inlet, middle, and outlet sections, and local resistance characterization within and adjacent areas, first pairs normal and target operating conditions within the same unit and time axis. Then, it jointly determines the cold-end temperature-domain deposition zoning boundary based on circumferential and upward flue gas flow differences, forming deposition zoning units with shared deposition determination meanings. Within each unit, deviation and coupling relationships are further constructed, and corresponding constraints are applied to edge offsets, outlet section changes, and resistance increases to form a comprehensive deposition volume. This allows key intermediate quantities characterizing the entry of viscous deposition to be stably extracted at the zoning scale.

[0080] Based on the aforementioned zoning characterization, this invention employs a TabM zoning attribution mechanism using deposition zoning units as the determination unit. Temperature, flow path, resistance, and zoning deposition groups are input separately and participate independently in the fusion mapping. This transforms the intangible deposition entry state variables into attributable latent variables of zoning deposition states and outputs zoning state labels for normal transition and initial blockage. To reduce label drift caused by the ambiguity of initial blockage and transition boundaries, this invention introduces a threshold judgment for the difference between initial blockage and transition attribution values ​​at the state attribution layer, ensuring that initial blockage determination has the necessary confidence interval. Subsequently, an initial blockage region is formed based on the adjacency relationship of zoning boundaries and the circumferential connectivity rules of co-flowing intervals, and mapped to the equipment sector range to obtain the initial blockage sector. This achieves a deliverable closed-loop output from signal difference to zoning state to sector placement. Compared to existing methods that primarily rely on whole-machine thresholds or fixed zoning, this approach is better suited to temperature range and flow shifts under changing operating conditions and directly places early localized viscous deposits into manageable sector locations.

[0081] like Figure 10 As shown, the cold end is expanded into a collection grid along the circumferential × flow direction. Deposition zone boundaries are generated and merged into units based on temperature / path / resistance differences. Initially blocked units are connected to form initially blocked regions, which are ultimately mapped to the equipment sector. Advantages: It improves the process from "determining whether there is a blockage" to "precisely pinpointing where the blockage is," locating the sector directly and facilitating operation and maintenance.

[0082] like Figure 11 As shown, the contour lines of the total sedimentary amount S in the spatial field are used to plot the continuous distribution of the total sedimentary amount S on the unfolded plane. The coloring and contour lines highlight the sedimentary hotspots, and the unit range spanned by the hotspots can be observed by overlaying the zoning boundaries. Advantages: It is more sensitive to early local cohesive sediments, provides a stable spatial structure representation, and lays the foundation for zoning determination and location.

[0083] like Figure 12 As shown, the initial clogging attribution value / probability Pclog output by TabM is displayed with red indicating high values ​​and blue indicating low values. High-value areas show clustering and banded expansion, reflecting the evolution of initial clogging from local to connected regions. Advantages: It integrates multi-source features and regional sedimentary characterization to achieve early identification of the transition-initial clogging stage and reduce false alarms, thereby improving the reliability and executability of early warning.

[0084] This embodiment addresses the problem of early-stage, localized, and difficult-to-locate cold-end viscous deposition. It acquires data on cold-end metal temperature, flue gas flow path characteristics, and local resistance characteristics under normal and target operating conditions, jointly determining the boundaries of cold-end temperature-domain deposition zones and forming depositional zone units. For each unit, metal temperature offset, flue gas flow path variation, and local resistance offset are extracted. The deviation and coupling relationships relative to normal operating conditions are calculated to construct zone depositional characterization quantities and form a zone status table. The zone status table is input into a TabM zone assignment model using depositional zone units as the determination unit, outputting zone status labels for normal, transitional, and initial blockage. Initial blockage determination and connectivity merging are performed based on the adjacency relationships of the zone boundaries, mapping to obtain the initial blockage sector. This invention can achieve zone identification and sector location for initial cold-end blockage under continuous operation conditions, providing a basis for operational management.

[0085] The second objective of this invention is to propose a TabM-based rotary air preheater cold-end initial blockage identification system, comprising: Deposition partitioning unit module: used to obtain the metal temperature, flue gas flow path characterization and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under the operating conditions to be identified, to determine the cold end temperature domain-deposition partition boundary, and to obtain the deposition partitioning unit; The partition status table module is used to extract the metal temperature offset, flue gas flow path change and local resistance offset in the sedimentation partition unit to form the partition sedimentation characterization quantity, and to merge them according to the same sedimentation partition unit to form the partition status table. Partition Status Label Module: Used to input the partition status table into the TabM partition attribution model, perform attribution calculation, and obtain partition status labels; The module for determining initial plugging sectors is used to determine initial plugging based on the partition status label and the cold end temperature range-deposition partition boundary, and to identify the depositional partition units whose partition status labels meet the initial plugging conditions as initial plugging sectors.

[0086] A third objective of this invention is to provide an electronic device comprising a processor, a memory, and a display screen. The memory and display screen are both connected to the processor, such as via a bus. Optionally, the electronic device may further include a transceiver. It should be noted that in practical applications, the transceiver is not limited to a single unit, and the structure of this electronic device does not constitute a limitation on the embodiments of this application.

[0087] The processor can 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 application. The processor can also be a combination that implements computational functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0088] A bus can include a pathway for transmitting information between the aforementioned components. The bus can be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc.

[0089] The memory 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 to these.

[0090] The memory stores the application code that executes the solution of this application, and its execution is controlled by the processor. The processor executes the application code stored in the memory to implement the content shown in the foregoing method embodiments.

[0091] A fourth objective of this invention is to provide a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, performs the aforementioned functions. Figure 1 The illustrated method embodiments include various processes. For example, a memory may include instructions that can be executed by a processor of an electronic device to perform the described method.

[0092] A computer-readable storage medium can be a tangible device that holds and stores instructions used by an instruction execution device. A computer-readable storage medium can be, but is not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any combination thereof. Specifically, a computer-readable storage medium can be a portable computer disk, a hard disk, a USB flash drive, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), staging random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory stick, floppy disk, optical disk, magnetic disk, mechanical encoding device, or any combination thereof.

[0093] A fifth objective of this invention is to provide a computer program product comprising computer instructions that, when executed by a processor, implement the above-described... Figure 1 The various processes of the method embodiments shown can achieve the same technical effect, and will not be described again here to avoid repetition.

[0094] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of this teaching should not be determined by reference to the foregoing description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed inventive subject matter.

[0095] The above content provides a further detailed description of the present invention. It should not be construed that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection of the present invention as defined by the submitted claims.

Claims

1. A method for identifying initial blockage at the cold end of a rotary air preheater based on TabM, characterized in that, include: The metal temperature, flue gas flow path characterization, and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under the operating conditions to be identified are obtained to determine the cold end temperature range-deposition zone boundary and obtain the deposition zone unit. Extract the metal temperature shift, flue gas flow path change, and local resistance shift in the sedimentary zoning unit to form zoning sedimentary characterization quantities, and merge them according to the same sedimentary zoning unit to form a zoning state table; Input the partition status table into the TabM partition attribution model, perform attribution calculation, and obtain the partition status label; Initial plugging is determined based on the zoning status label and the cold end temperature range-deposition zoning boundary. Deposition zoning units whose zoning status labels meet the initial plugging conditions are identified as initial plugging sectors.

2. The method for identifying initial blockage at the cold end of a rotary air preheater based on TabM according to claim 1, characterized in that, The process involves acquiring the metal temperature, flue gas flow path characterization, and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under the conditions to be identified, determining the cold end temperature range—deposition zone boundary, and obtaining the deposition zone unit, including: The data acquisition units are defined according to the circumferential position of the cold end of the rotary air preheater and the direction of flue gas flow. The metal temperature acquisition position, the flue gas flow path characterization acquisition position, and the local resistance characterization acquisition position are set. Then, data is acquired under normal operating conditions and under the condition to be identified, and the metal temperature, flue gas flow path characterization, and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under the condition to be identified are obtained. The metal temperature, flue gas flow path characterization, and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under the operating conditions to be identified are correlated according to the same acquisition unit to determine the cold end temperature domain-deposition zone boundary and obtain the zone candidate body enclosed by the cold end temperature domain-deposition zone boundary. Continuous candidate regions in which the metal temperature difference sequence, flue gas flow path characterization difference sequence, and local resistance characterization difference sequence all change in the same direction are grouped into sedimentary partitioning units.

3. The method for identifying initial blockage at the cold end of a rotary air preheater based on TabM according to claim 2, characterized in that, The metal temperature difference sequence includes: The metal temperatures at the intra-regional position, along the flue gas flow direction, and at the edge position in each candidate region are compared and calculated to obtain the intra-regional metal temperature difference, the metal temperature difference along the flue gas flow direction, and the edge metal temperature difference, which are then arranged according to the circumferential position and the flue gas flow direction. The differential sequence representing the path of the flue gas flow includes: The characteristics of the flue gas flow path in the inlet, middle and outlet sections of each candidate region are compared and calculated to obtain the differences in the inlet section, middle section and outlet sections respectively, and arranged according to the circumferential position and flue gas flow direction; The local resistance characterization difference sequence includes: The local resistance characteristics of the intra-regional location and the adjacent candidate region location in each candidate region are compared and calculated to obtain the differences in local resistance characteristics within the region and the differences in local resistance characteristics between adjacent candidate regions, and are arranged according to the circumferential location and the direction of flue gas flow.

4. The method for identifying initial blockage at the cold end of a rotary air preheater based on TabM according to claim 1, characterized in that, The extracted metal temperature shift, flue gas path variation, and local resistance shift within the sedimentary zoning unit are used to form zoning sedimentary characterization parameters. These parameters are then grouped according to the same sedimentary zoning unit to form a zoning status table, including: Extract the metal temperature offset, flue gas flow path variation, and local resistance offset from the metal temperature, flue gas flow path characterization, and local resistance characterization under normal and identified operating conditions in each deposition partition unit; Based on the metal temperature, flue gas flow path characterization and local resistance characterization under normal and identified operating conditions, extract the metal temperature offset, flue gas flow path change and local resistance offset, calculate the deviation and mutual coupling relationship of the metal temperature offset, flue gas flow path change and local resistance offset relative to normal operating conditions, and form the zonal deposition characterization quantity. The metal temperature offset, flue gas flow path change, local resistance offset, and regional deposition characterization are grouped together according to the same depositional zone unit to form a zone status table.

5. The method for identifying initial blockage at the cold end of a rotary air preheater based on TabM according to claim 1, characterized in that, The step of inputting the partition status table into the TabM partition affiliation model, performing affiliation calculation, and obtaining the partition status label includes: Extract the status records of each partition according to the partition status table, and determine the input order according to the arrangement order of the sedimentation partition units determined by the cold end temperature domain-deposition partition boundary. Input them into the group input layer of the TabM partition belonging model in sequence to obtain the metal temperature group representation, flue gas flow path group representation, local resistance group representation and partition deposition group representation. The metal temperature group, flue gas flow path group, local resistance group, and partitioned deposition group are input into the merging and fusion layer for merging to form a partitioned fusion representation. The partitioned fusion representation is then input into the TabM backbone layer to calculate the assignment of latent variables of partitioned deposition state and obtain the state assignment value. The state attribution value is input into the state attribution layer to form the normal state attribution value, the transitional state attribution value, and the initial blockage state attribution value. The state corresponding to the maximum value among the normal state attribution value, the transitional state attribution value, and the initial blockage state attribution value is determined as the partition state label.

6. The method for identifying initial blockage at the cold end of a rotary air preheater based on TabM according to claim 1, characterized in that, The initial plugging determination based on the partition status label and the cold end temperature range-deposition partition boundary, identifying depositional partition units whose partition status labels meet the initial plugging conditions as initial plugging sectors, includes: The circumferential position and flue gas flow direction of each sedimentary zone unit are determined based on the cold end temperature range-sedimentary zone boundary, and the zone status label is mapped to the sedimentary zone unit. Depositional zoning units with the zoning status label of initial plugging are identified as initial plugging units, and depositional zoning units that are adjacent to initial plugging units on the cold end temperature domain-depositional zoning boundary and whose zoning status label is transitional are judged to meet the initial plugging conditions. The initial plugging unit and the sedimentary partition unit that meets the initial plugging condition are connected and merged according to the condition that they are circumferentially continuous and located in the same flue gas flow direction interval to form the initial plugging area; The initial blockage area is mapped to the sector range of the cold end of the rotary air preheater, and the sector range containing the initial blockage area is defined as the initial blockage sector.

7. A TabM-based rotary air preheater cold-end initial blockage identification system, based on the TabM-based rotary air preheater cold-end initial blockage identification method according to any one of claims 1-6, characterized in that, include: Deposition partitioning unit module: used to obtain the metal temperature, flue gas flow path characterization and local resistance characterization of the cold end of the rotary air preheater under normal operating conditions and under the operating conditions to be identified, to determine the cold end temperature domain-deposition partition boundary, and to obtain the deposition partitioning unit; The partition status table module is used to extract the metal temperature offset, flue gas flow path change and local resistance offset in the sedimentation partition unit to form the partition sedimentation characterization quantity, and to merge them according to the same sedimentation partition unit to form the partition status table. Partition Status Label Module: Used to input the partition status table into the TabM partition attribution model, perform attribution calculation, and obtain partition status labels; The module for determining initial plugging sectors is used to determine initial plugging based on the partition status label and the cold end temperature range-deposition partition boundary, and to identify the depositional partition units whose partition status labels meet the initial plugging conditions as initial plugging sectors.

8. An electronic device, characterized in that, The 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, it implements the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater as described in any one of claims 1-6.

10. A computer program product, characterized in that, Includes computer instructions that, when executed by a processor, implement the TabM-based method for identifying initial blockage at the cold end of a rotary air preheater as described in any one of claims 1-6.

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