Redundant steelmaking flue gas purification system reconstruction control and uninterrupted collaborative maintenance system and method

Abstract

The invention provides a reconstruction control and uninterrupted collaborative maintenance system and method for a redundant steelmaking flue gas purification system, and belongs to the technical field of ferrous metallurgy environmental protection equipment.The inlet pressure of a dust remover and the temperature of a cloth bag layer are monitored in real time through pressure and temperature sensors, and the health state of the equipment is judged in combination with a fault diagnosis unit; adjusting the opening degree of an electric valve and the rotating speed of a fan according to the production plan and the residual filtering capacity of the dust remover to realize optimal distribution of flue gas flow; when a certain dust remover breaks down, related valves of the dust remover are automatically closed for isolation, an electric valve bridging a secondary pipeline is opened, and flue gas is guided to other usable dust removers for cooperative treatment. The system supports completion of fault isolation and flue gas passage switching under the non-stop production condition. Redundant mutual backup and dynamic reconstruction among multiple dust removers are realized, and the single-point fault risk is eliminated; continuous operation of the flue gas purification system is guaranteed, production halt caused by equipment faults is avoided, the maintenance efficiency is improved, and the system operation stability and the environment-friendly standard reaching capacity are improved.

Description

Technical Field

[0001] This invention belongs to the field of environmental protection equipment technology in iron and steel metallurgy, specifically relating to a redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance system and method. Background Technology

[0002] The steel industry is a vital basic industry, but the pollution from flue gas generated during its production process has long been a concern. The steelmaking process, especially in converters and refining furnaces, produces large amounts of dust-laden flue gas, primarily composed of metal oxide dust such as FeO and CaO, with concentrations reaching 10-50 g / m³, as well as CO and NO. x Harmful gases are emitted during steelmaking. Direct emission of these gases would not only cause severe dust pollution but could also trigger respiratory illnesses among nearby residents, while simultaneously wasting recyclable dust resources. Therefore, the purification of steelmaking flue gas is a crucial step for steel companies to achieve environmental compliance and resource recycling.

[0003] In the steelmaking flue gas purification methods of related technologies, the secondary flue gas from the converter is transported to the dust collector through pipelines. If the dust collector bags are clogged or the fan malfunctions, the machine must be shut down immediately for repair; otherwise, the flue gas cannot be purified and will be directly discharged. Such single-point failures can lead to production stoppages and affect output.

[0004] The relevant technology employs a control method with fixed valve openings and constant fan speeds, neglecting dynamic changes in production plans and the remaining capacity of the dust collector. For example, when the flue gas volume surges during the later stages of converter blowing, the fixed valve openings of this technology cannot meet the flow demand, leading to excessive pipeline pressure. When converter 1 is shut down, the fans continue to run at full speed, resulting in high energy consumption under no-load conditions. Furthermore, the lack of real-time monitoring and fault handling for the dust collector's operating status means that partial damage to the filter bags cannot be detected promptly, causing fluctuations in particulate matter emission concentrations. When the fans malfunction, flue gas is directly discharged, resulting in excessive dust emissions. Summary of the Invention

[0005] This invention provides a redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance system. The system improves system reliability, eliminates the risk of single point of failure, achieves maintenance without production interruption, and reduces energy consumption through load distribution.

[0006] The system includes: Converter 1, Converter 2, and Refining Furnace; The main pipeline connects the converter's secondary dust collector hood to the primary dust collector C1. Electric valves C11 and C12 are installed on the main pipeline. The main pipeline 2 connects to the secondary dust collector hood and secondary dust collector C2 of converter 2. Electric valves C21 and C22 are installed on the main pipeline 2. The main pipeline 3 connects the tertiary dust hood and tertiary dust collector C3 of converter 1 and converter 2. Electric valves C31 and C32 are installed on the main pipeline 3. The main pipeline 4 connects to the dust hood of the refining furnace and the refining dust collector C4. Electric valves C41 and C42 are installed on the main pipeline 4. The secondary pipelines are horizontally connected to the main pipelines one through four, and the connection points with each main pipeline are located inside the dust collector isolation section, forming a four-way interconnected flue gas channel network. Electric valve A1 is installed on the secondary pipeline between main pipeline one and main pipeline two; Electric valve A2 is installed on the secondary pipeline between main pipeline 2 and main pipeline 3; Electric valve A3 is installed on the secondary pipeline between main pipeline one and main pipeline four.

[0007] It should be further explained that a dynamic reconfiguration control module is configured, which includes pressure sensors arranged at the inlet of each dust collector, temperature sensors arranged in the filter bag layer of the dust collector, a fault diagnosis unit for determining the health status of the dust collector, and a load distribution unit for dynamically adjusting the flue gas flow rate according to the production plan and the remaining capacity of the dust collector.

[0008] It should be further noted that a three-dimensional maintenance access is also provided, which includes a detachable walkway covering all main and secondary pipelines, a modular maintenance platform integrated on the electric valve operating side, and an emergency bypass pipeline hidden under the secondary pipelines for temporary diversion of flue gas in case of failure.

[0009] According to another embodiment of this application, a method for reconfiguration control and uninterrupted collaborative maintenance of a redundant steelmaking flue gas purification system is provided, the method comprising the following steps: Step S101: The pressure data at the inlet of each dust collector is detected in real time by the pressure sensor, and the temperature data of the filter bag layer of each dust collector is detected in real time by the temperature sensor. The fault diagnosis unit judges the health status of the dust collector based on the pressure data and temperature data. Step S102: Based on the production plan and the remaining capacity of the dust collector, dynamically adjust the speed of the electric valves and the corresponding fans to distribute the flue gas flow. Step S103: When the fault diagnosis unit determines that a dust collector is faulty, the dynamic reconfiguration control module performs the following actions: Close the electric valve corresponding to the faulty dust collector to isolate the faulty dust collector; Open the electric valve on the secondary pipeline connected to the faulty dust collector to guide the flue gas corresponding to the faulty dust collector to other available dust collectors for treatment.

[0010] It should be further explained that, in this method, maintenance personnel reach the location of the faulty dust collector through a detachable walkway and a modular maintenance platform, and perform maintenance operations on the faulty dust collector without stopping production. When performing planned maintenance on a dust collector, the following actions should be taken: Close the electric valve on the main pipeline corresponding to the dust collector; Open the electric valve on the secondary pipeline corresponding to the dust collector, and use the redundant capacity of other dust collectors to process the corresponding flue gas in a coordinated manner, so as to achieve uninterrupted maintenance.

[0011] It should be further noted that step S101 also includes the following steps: Pressure sensors are arranged in layers near the inlet and outlet of each dust collector on the main pipeline. Each pressure sensor collects flue gas pressure pulsation values, records the timestamp of the pressure data and the corresponding dust collector's operation identifier, forming a pressure data stream with spatiotemporal markers. Temperature sensor arrays are set at the inlet, middle and outlet of the dust collector bag layer. Each array contains multiple temperature sensors arranged at equal intervals along the flue gas flow direction. The temperature sensors collect the surface temperature of the bag. Flue gas sensors and oxygen sensors are also set to collect the particulate matter concentration and oxygen content in the flue gas. The temperature data of each layer are correlated with the flue gas parameters at the corresponding locations to generate a temperature distribution matrix of the bag layer. Based on the pressure fluctuation pattern and baghouse temperature change trend of the dust collector during normal operation under different production loads, a production load-related feature library is established. Based on external parameters such as the furnace schedule in the current production plan, the flue gas flow rate at the dust collector inlet, and the negative pressure in the furnace, the feature dataset in the pressure-temperature correlation feature library is weighted. After weighting, a real-time judgment threshold is generated. When the inlet pressure of a dust collector or the temperature of the bag layer exceeds the corresponding real-time threshold and the duration exceeds the allowable deviation period under the operating condition, a health status warning is triggered. The pressure and temperature data of the dust collector that triggered the warning will be cross-validated with the real-time operating data of other dust collectors in the same system and cross-system related equipment. If the operating parameters of other related equipment do not show any matching abnormal fluctuations, it will be determined that the dust collector itself is faulty; otherwise, it will be marked as a system-level anomaly and global data tracing will be initiated.

[0012] It should be further noted that step S101 also includes the following steps: A metal cover with micropores is installed on the surface of the pressure sensor at the inlet of each dust collector to prevent large dust particles in the flue gas from being blocked by the metal cover, so that the pressure can be transmitted to the pressure sensor. A thermally conductive ceramic sleeve is fitted around the temperature sensing element of the temperature sensor to increase the contact area with the flue gas, making the temperature sensor detect temperature changes in the bag filter layer more quickly. The pressure data collected by the pressure sensor is matched with the standard pressure ranges corresponding to the pre-divided early, middle, and late stages of converter blowing and the heating and holding stages of the refining furnace. The upper and lower limits of the pressure fluctuation range of each stage are the values ​​after adding a 5% margin to the extreme values ​​of the historical normal operating pressure. The temperature data collected by the temperature sensor is compared with the safe temperature threshold determined by thermal stability test of each dust collector bag material. The safe temperature threshold is 10-15℃ lower than the temperature at which the bag begins to deform. The fault diagnosis unit combines the stage matching results of pressure data and the threshold comparison results of temperature data. When the pressure data exceeds the standard pressure range of the corresponding smelting stage and the temperature data is close to or exceeds the safe temperature threshold, the dust collector is determined to be in an abnormal health state. If only the pressure data exceeds the range or only the temperature data is close to the threshold, it is determined to be a potential abnormality and an early warning is issued.

[0013] It should be further noted that step S102 also includes the following steps: Based on the real-time inlet pressure, bag temperature, fan current, historical maintenance records, flue gas humidity, and dust concentration of each dust collector, the remaining processing capacity of a single dust collector is calculated. The remaining capacity is defined as the difference between the maximum flue gas volume that the dust collector can stably operate under the current operating conditions and the actual input flue gas volume, expressed as a percentage. The production plan is broken down into stages: converter blowing period, refining power-on period, converter tapping period, and equipment standby period. Each stage is marked with the corresponding flue gas source, expected duration, and flue gas volume range. The primary dust collector C1 and secondary dust collector C2 are available during the blowing period, the tertiary dust collector C3 is available at all times, and the refining dust collector C4 is available only during the refining period. A correspondence between production stages and the available capacity of dust collectors is established. Calculate the pressure difference between the main pipelines based on the real-time inlet pressure of each main pipeline.

[0014] It should be further noted that step S102 also includes the following steps: Obtain the blowing process duration of converter 1 and converter 2, as well as the heating process duration of the refining furnace. Based on the historical flue gas generation of each process, determine the total flue gas flow rate requirement for different time periods. The remaining percentage of the filter area of ​​each dust collector's bag is detected, and based on the total flue gas flow requirement, the proportion of flue gas flow that each dust collector needs to handle is initially allocated. According to the initially allocated flue gas flow ratio, the electric valves on the corresponding main pipeline and secondary pipeline are adjusted in a gradient manner, and the valves are kept for a preset time after each adjustment to stabilize the flue gas flow. Based on the actual flue gas distribution after the electric valve adjustment, the fan speed of each dust collector is adjusted in stages. During the adjustment of electric valves and fan speeds, the inlet pressure of each dust collector and the temperature of the filter bag are continuously monitored. When the pressure fluctuation range is ±2kPa and the temperature fluctuation range is ±5℃, the current flue gas flow distribution is determined to have reached a stable state.

[0015] It should be further noted that step S103 also includes the following steps: The pressure sensor detects that the inlet pressure of the primary dust collector C1 drops from 1.8 kPa to 1.2 kPa within 5 seconds, indicating that the filter bag is damaged. The temperature sensor detects that the temperature of a single compartment of the filter bag layer jumps from 220°C to 350°C within 10 seconds. The fan current transformer monitors that the current returns to zero, triggering a differentiated emergency procedure. Close the inlet electric valve of the faulty dust collector, and close the outlet electric valve after a preset delay; open the electric valve of the secondary pipeline connected to the faulty dust collector, and gradually increase the valve opening to the target value at a rate of 10% / s. During the flue gas guidance process, the inlet pressure fluctuation value of the dust collector without faults, the temperature variation coefficient of the bag layer, the vibration value of the fan bearing, the actual opening deviation of the secondary pipeline valves, and the infrared temperature of the valve body are collected in real time. When the inlet pressure fluctuation of the dust collector without faults is greater than 15% of the design value or the temperature variation coefficient of the bag layer is greater than 12%, the opening of the secondary pipeline valves is adjusted in the opposite direction until the system pressure and temperature distribution return to the stable range. After fault isolation and flue gas guidance are completed, the effectiveness of fault isolation is tested; the no-load warm-up procedure for the standby fan is pre-started.

[0016] As can be seen from the above technical solutions, the present invention has the following advantages: The redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance system provided by this invention utilizes the parallel arrangement of main pipelines one to four, the four interconnected secondary pipelines, and an emergency bypass pipeline hidden beneath the secondary pipelines. When a dust collector fails, the flue gas can be diverted to an adjacent dust collector through the secondary pipelines. If the C2 load exceeds the limit, the emergency bypass pipeline can further divert the gas.

[0017] The detachable walkway of the three-dimensional maintenance channel covers all pipelines, and the maintenance platform is integrated on the electric valve operating side. With the operation of valve isolation of faulty dust collectors and redundant diversion of flue gas, maintenance personnel can quickly reach the maintenance point to carry out work without stopping the system.

[0018] The load distribution unit, combining production plans and remaining dust collector capacity, adjusts the opening of electric valves and fan speed in a gradient manner to ensure that each dust collector always operates within its high-efficiency load range. Monitoring by pressure and temperature sensors, along with rapid flue gas diversion in case of malfunction, ensures that the dust collector bags are always in normal filtration mode, and that the particulate matter emission concentration remains consistently below the threshold. The modular piping and valve design facilitates component replacement, and flow distribution prevents prolonged overload or idling of the dust collectors. This achieves improved reliability, increased efficiency, and reduced energy consumption. Attached Figure Description

[0019] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 Schematic diagram of a reconfigured control and uninterrupted collaborative maintenance system for a redundant steelmaking flue gas purification system; Figure 2 A flowchart for the reconfiguration control and uninterrupted collaborative maintenance method of a redundant steelmaking flue gas purification system. Detailed Implementation

[0021] The redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance system of this invention adopts a four-way parallel main pipeline architecture, corresponding to the secondary dust removal of the converter, the tertiary shared dust removal, and the refining furnace dust removal. A multimodal redundant flue gas channel network is constructed through horizontal secondary pipeline interconnection. Each main pipeline is equipped with front and rear dual electric valves to form a dust collector isolation section. Based on integrated pressure / temperature sensors, fault diagnosis units, and load distribution algorithms, valve opening and fan speed are optimized in real time to achieve dynamic distribution and emergency switching of flue gas load. Through three-dimensional maintenance channels and valve collaborative control, equipment maintenance is supported without interrupting production. This invention, through the deep integration of hardware redundancy design, intelligent control algorithms, and human-machine collaborative maintenance, achieves comprehensive improvements in environmental protection, energy efficiency, and economic benefits while ensuring continuous production, and has extremely strong industrial application value.

[0022] The following describes in detail the redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance system involved in this application. Specific details, such as particular system structures and technologies, are presented for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application can also be implemented in other embodiments without these specific details.

[0023] It should be understood that, when used in this specification, terms include indicating the presence of a described feature, integral, step, operation, element, and / or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. The terms include, encompass, have, and variations thereof mean including but not limited to, unless otherwise specifically emphasized.

[0024] It should be understood that "one or more" as mentioned in this application refers to one, two, or more than two, and "multiple" as mentioned in this application refers to two or more. In the description of this application, unless otherwise stated, " / " indicates "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone.

[0025] To facilitate a clear description of the technical solution of this application, the terms "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, nor do they necessarily imply that they are different.

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1 The diagram shown is a schematic of a redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance system in a specific embodiment. The system includes: Main pipe 101 connects the secondary dust collector hood of converter 1 to the primary dust collector C1. Electric valve C11 is located near the secondary dust collector hood of converter 1, and electric valve C12 is located near the dust collector C1. The two valves work together to control the on / off state and flow rate of the flue gas inside main pipe 101. The secondary flue gas generated by the blowing process in converter 1 is collected by the dust collector hood and then transported to the dust collector C1 for purification via main pipe 101.

[0028] Here, the flue gas flow in main pipeline 101 is regulated by opening and closing electric valves C11 and C12. When dust collector C1 or converter 1 needs maintenance, closing the two valves isolates the secondary flue gas from converter 1 from dust collector C1. This allows for independent control of the converter 1 and secondary flue gas purification systems, ensuring flue gas collection and purification during normal production and enabling rapid pipeline disconnection during maintenance without interfering with other systems.

[0029] In this embodiment, main pipeline 2 102 connects the secondary dust collector hood and secondary dust collector C2 of converter 2. Electric valve C21 is located near the secondary dust collector hood of converter 2, and electric valve C22 is located near the dust collector C2. These valves are used to control the on / off state and flow rate of the flue gas within main pipeline 2 102. The secondary flue gas generated during the blowing process in converter 2 is collected by the dust collector hood and then transported to the dust collector C2 for purification via main pipeline 2 102.

[0030] In this embodiment, electric valves C21 and C22 are used to regulate the flue gas flow in the second main pipeline 102. When the second converter is under maintenance or the dust collector C2 is being maintained, closing the valves can isolate the corresponding system. This allows the secondary flue gas purification system of the second converter to operate independently and in parallel with the system of the first converter, improving overall flexibility. When a single converter or its corresponding dust collector is under maintenance, it does not affect the flue gas purification of other furnaces.

[0031] In this embodiment, main pipeline 3 (103) connects the tertiary dust collectors of converters 1 and 2 to a shared tertiary dust collector C3. Electric valve C31 connects to the tertiary flue gas from converter 1, and electric valve C32 connects to the tertiary flue gas from converter 2. The tertiary flue gas from both converters is collected by their respective dust collectors and then converges into main pipeline 3 (103), before being transported to dust collector C3 for purification. Electric valves C31 and C32 control the flow of tertiary flue gas from converters 1 and 2 into main pipeline 3 (103), respectively, achieving centralized purification of the tertiary flue gas from both converters.

[0032] This embodiment uses a shared dust collector C3 to save on equipment investment; the tertiary flue gas of each converter is independently controlled by valves. When the tertiary flue gas system of a single converter is under maintenance, the corresponding valve is closed, and the other converter can still be purified normally, improving equipment utilization and system redundancy.

[0033] In this embodiment, main pipe 4 104 connects the refining furnace dust hood and the refining dust collector C4. Electric valve C41 is located near the refining furnace dust hood, and electric valve C42 is located near the dust collector C4, controlling the on / off state and flow rate of the refining furnace flue gas to the dust collector C4. The flue gas generated during refining in the refining furnace is collected by the dust hood and then transported by main pipe 4 104 to the dust collector C4 for purification.

[0034] This embodiment utilizes electric valves C41 and C42 to regulate the flue gas flow in main pipeline 104; the pipeline can be flexibly controlled during refining furnace production or maintenance. This achieves independent control of the refining furnace's flue gas purification; when the refining furnace or dust collector C4 is under maintenance, the valve isolation system is closed, without affecting the flue gas purification process of other furnaces.

[0035] In this embodiment, the secondary pipeline 1 is horizontally connected to the main pipeline 101 to the main pipeline 4 104, and the connection point with each main pipeline is located inside the isolation section of the dust collector, that is, the section where the dust collector is connected to the main pipeline and can be isolated by valves, forming a four-way interconnected flue gas channel network.

[0036] When a dust collector on a main pipeline fails or is under maintenance, the secondary pipeline can serve as a flue gas transfer channel, allowing flue gas to flow from the faulty main pipeline to other normal main pipelines and dust collectors. This improves system reliability and flexibility.

[0037] In this embodiment, electric valve A1 is installed on secondary pipeline 1 between main pipeline 101 and main pipeline 202, electric valve A2 is between main pipeline 202 and main pipeline 303, and electric valve A3 is between main pipeline 101 and main pipeline 404, respectively, for guiding flue gas between different main pipelines.

[0038] It should be noted that when the dust collector on a certain main pipeline fails to operate, the corresponding A-series valve is opened, allowing the flue gas to flow through the secondary pipeline to the dust collector on another main pipeline. For example, if C1 on main pipeline 101 fails, opening A1 will allow the flue gas from converter 1 to be purified by C2 on main pipeline 202. Through the cross-pipeline electric valves, flexible flue gas flow between different main pipelines is achieved, enhancing system redundancy and ensuring uninterrupted flue gas purification during production.

[0039] The dynamic reconfiguration control module in this embodiment includes: pressure sensors arranged at the inlet of each dust collector to monitor inlet pressure and reflect changes in bag blockage or flue gas flow; temperature sensors arranged in the dust collector bag layer to monitor bag temperature and prevent overheating damage; a fault diagnosis unit to determine the health status of the dust collector based on pressure and temperature data; for example, a sudden increase in pressure may indicate bag blockage, and excessively high temperature may indicate abnormal heating; and a load distribution unit to dynamically adjust the opening of electric valves and fan speed to distribute flue gas flow based on the production plan and the remaining capacity of the dust collector. This achieves intelligent monitoring and dynamic control of the system, optimizing flue gas distribution according to actual conditions, improving purification efficiency, and reducing energy consumption.

[0040] This embodiment of the three-dimensional maintenance access system includes: a detachable walkway covering all main and secondary pipelines, facilitating movement of maintenance personnel between pipelines; a modular maintenance platform integrated on the operating side of the electric valves, enabling easy valve maintenance; and an emergency bypass pipeline hidden beneath the secondary pipelines, which opens in case of a fault to temporarily divert flue gas. This achieves uninterrupted collaborative maintenance, allowing maintenance personnel to quickly reach maintenance points and utilize the maintenance platform without system shutdown; the emergency bypass ensures a temporary flue gas diversion channel in case of a fault, improving system maintainability and reliability and reducing unplanned downtime.

[0041] The following are embodiments of the redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance method provided in this disclosure. This method belongs to the same inventive concept as the redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance system in the above embodiments. For details not described in detail in the embodiments of the redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance method, please refer to the embodiments of the redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance system described above.

[0042] like Figure 2 As shown, the method includes the following steps: Step S101: The pressure data at the inlet of each dust collector is detected in real time by pressure sensors, and the temperature data of the filter bag layer of each dust collector is detected in real time by temperature sensors. The fault diagnosis unit determines the health status of the dust collector based on the pressure data and temperature data.

[0043] In this embodiment, the pressure sensor is fixed to the horizontal section of the inlet pipe of each dust collector to collect pressure data and record the data fluctuation range; the temperature sensor needs to be embedded in the middle area of ​​the dust collector's bag layer to collect temperature data. The fault diagnosis unit first retrieves the historical normal operation data of each dust collector. For example, when the primary dust collector C1 is working normally, the inlet pressure is 5-8 kPa and the bag layer temperature is 40-60℃. Then, the real-time collected pressure data and temperature data are compared with the historical normal range: if the pressure data exceeds the upper limit of the normal range by 20% for 10 seconds, the dust collector is determined to be in an abnormal health state; if the pressure rises suddenly and the temperature rises simultaneously, it is determined to be a fault, such as bag blockage accompanied by local overheating.

[0044] It should be noted that in steelmaking flue gas purification, the inlet pressure of the dust collector directly reflects the flow resistance of the flue gas in the pipeline. The more dust adheres to the filter bags, the greater the resistance and the higher the inlet pressure; the temperature of the filter bag layer is directly related to the safety of the filter bags. The filter bag material has a fixed thermal stability range; excessively high temperatures will cause the filter bags to shrink, break, and lose their filtration capacity. By comparing real-time sensor data with historical normal thresholds, an accurate assessment of the dust collector's health status can be achieved.

[0045] Step S102: Based on the production plan and the remaining capacity of the dust collector, dynamically adjust the speed of the electric valves and the corresponding fans to distribute the flue gas flow.

[0046] The optional method in this embodiment is as follows: Obtain the production plan for converter one blowing from 10:00 to 11:00, converter two blowing from 11:30 to 12:30, and refining furnace heating from 9:00 to 10:30. Then, combine the remaining capacity of each dust collector and calculate the pressure data of S101. For example, if the inlet pressure of secondary dust collector C2 is 6 kPa, which is lower than the normal upper limit of 8 kPa, the remaining capacity is about 25%, which can handle an additional 2000 m³ / h of flue gas. Preliminary determination of the flow distribution ratio is made. For example, from 10:00 to 10:30, primary dust collector C1 handles 8000 m³ / h of flue gas from converter one, refining dust collector C4 handles 5000 m³ / h of flue gas from refining furnace, and secondary dust collectors C2 and C3 are in low-load standby.

[0047] To dynamically adjust the electric valves, if the amount of flue gas handled by the secondary dust collector C2 is increased, first gradually adjust the opening of the main pipeline C21 from 30% to 50%, adjusting by 5% each time with a 20-second interval to avoid sudden changes in flow rate. Then adjust the opening of the secondary pipeline A1 from 0% to 20%. Next, match the fan speed; increase the original speed of the secondary dust collector C2 fan from 1450 r / min to 1600 r / min, and complete the speed adjustment in 3 steps.

[0048] It can be seen that the flue gas flow rate in steelmaking changes dynamically with the smelting process, and the remaining capacity of the dust collector changes with the amount of dust adhering to the filter bags. Step S102 involves determining the total flue gas flow rate requirement for different time periods based on the production plan, allocating the load of each dust collector in conjunction with the remaining capacity of the dust collectors, and achieving a balance between load and capacity by adjusting the opening of electric valves and the speed of fans. This ensures that the flue gas can be efficiently purified regardless of whether it is single-furnace production or multiple furnaces operating in parallel, without insufficient purification capacity or redundant waste.

[0049] Step S103: When the fault diagnosis unit determines that a dust collector is faulty, the dynamic reconfiguration control module performs the following actions: closes the electric valve corresponding to the faulty dust collector to isolate the faulty dust collector; opens the electric valve on the secondary pipeline connected to the faulty dust collector to guide the flue gas corresponding to the faulty dust collector to other available dust collectors for treatment.

[0050] In this embodiment, if S101 determines that the primary dust collector C1 is faulty, the dynamic reconfiguration control module first performs an isolation action: it first closes the electric valve C12 on the side of the primary dust collector C1 near the dust collector to prevent dust from flowing back into the faulty dust collector, and then closes the electric valve C11 on the side of the primary dust collector C1 near the converter.

[0051] In this embodiment, when performing the diversion action, the electric valve A1 of the secondary pipeline between main pipeline one and main pipeline two is opened, and the remaining capacity of the secondary dust collector C2 is checked. If the remaining capacity of the secondary dust collector C2 is ≥30%, all the secondary flue gas from converter one is diverted to the secondary dust collector C2. If the inlet pressure of the secondary dust collector C2 exceeds 10.4 kPa after diversion, the emergency bypass pipeline valve below the secondary pipeline is immediately opened to temporarily divert 2000 m³ / h of flue gas. Maintenance personnel are notified to reach the modular maintenance platform of the primary dust collector C1 via the detachable walkway of the three-dimensional maintenance passage. Under the condition of continuous diversion by the emergency bypass and stable purification by C2, the damaged filter bag of C1 is replaced. Finally, the C2 fan speed is finely adjusted: gradually increased from 1450 r / min to 1650 r / min, so that the C2 inlet pressure is maintained at 7.2-8.8 kPa.

[0052] As can be seen, this embodiment closes the valve closest to the faulty end first, then closes the valve furthest away, using a delay to avoid pipeline pressure surges. The flue gas diversion utilizes redundant secondary pipeline channels to transfer flue gas from the faulty system to the normal system with sufficient remaining capacity. By leveraging fluid flow and pipeline redundancy, the purification path is switched without interrupting flue gas generation. The emergency bypass pipeline provides an additional diversion channel when the normal standby dust collector exceeds its load limit, ensuring that the overall system purification capacity is not lower than required and preventing direct discharge of flue gas.

[0053] In one embodiment of the present invention, based on step S101, the following will provide a possible embodiment and its specific implementation will be described in a non-limiting manner. Step S101 further includes the following steps: S1011: Pressure sensors are arranged in layers near the inlet and outlet of each dust collector on the main pipeline; each pressure sensor collects the flue gas pressure pulsation value, records the timestamp of the pressure data and the corresponding dust collector's operation identifier, forming a pressure data stream with timestamp and equipment identifier.

[0054] It should be noted that the main pipeline layout is inside the dust collector; the pressure sensor adopts a high-temperature resistant piezoelectric sensor, and the collected data carries a timestamp and dust collector operation identifier to distinguish between converter primary and secondary, converter secondary and tertiary common operating conditions, and refining furnace.

[0055] S1012: Temperature sensor arrays are set at the inlet, middle section and outlet of the dust collector bag layer. Each array contains multiple temperature sensors arranged at equal intervals along the flue gas flow direction. The temperature sensors collect the surface temperature of the bag. The concentration of particulate matter and oxygen content in the flue gas are also collected by setting flue gas sensors and oxygen sensors. The temperature data of each layer are correlated with the flue gas parameters at the corresponding positions to generate a temperature distribution matrix of the bag layer.

[0056] It should be noted that the temperature of the filter bag layer decreases with the direction of airflow, which is a normal phenomenon. Excessive particulate matter concentration causes frictional heat generation in the filter bag, and excessive oxygen causes secondary combustion, both of which will disrupt the gradual temperature change. By analyzing the temperature gradient and the uniformity of distribution, we can distinguish between different types of faults such as blockage, damage, and burn.

[0057] S1013: Based on the pressure fluctuation pattern and baghouse temperature change trend of the dust collector during normal operation under different production loads, establish a production load-related feature library; The production load-related feature library includes: the correlation between pressure pulsation amplitude and temperature gradient, the correlation between average pressure and average temperature in the bag filter section, and the correlation between pressure fluctuation period and temperature change rate. Each correlation contains feature datasets for full load, half load, and low load. Thus, changes in flue gas flow rate and dust concentration under different loads lead to pressure fluctuations and changes in temperature distribution; offline learning of normal state benchmark features provides a reference for normal ranges in online determination.

[0058] S1014: Based on external parameters such as furnace schedule, flue gas flow rate at the dust collector inlet, and furnace negative pressure in the current production plan, the feature dataset in the pressure-temperature correlation feature library is weighted; after weighting, a real-time judgment threshold is generated. When the inlet pressure of a dust collector or the temperature of the bag filter exceeds the corresponding real-time threshold and the duration exceeds the allowable deviation period under the operating condition, a health status warning is triggered.

[0059] It should be noted that minor blockages under low load have a significant impact on pressure, while high flow rates under high load can mask local faults; adjusting the threshold can help match the judgment logic with the actual operating conditions and avoid false alarms / missed alarms.

[0060] S1015: Cross-validate the pressure and temperature data of the dust collector that triggered the warning with the real-time operating data of other dust collectors in the same system and cross-system related equipment; if the operating parameters of other related equipment do not show any abnormal fluctuations, it is determined that the dust collector itself is faulty; otherwise, it is marked as a system-level anomaly and global data tracing is initiated.

[0061] It should be noted that after a dust collector issues an alarm, the system retrieves synchronous data from secondary dust collector C2, tertiary dust collector C3, and other cross-system equipment. If the parameters of other equipment show no abnormalities, the fault is determined to be its own; otherwise, a system-level anomaly is marked, and global data is reviewed. False alarms due to external interference are eliminated through cross-equipment parameter consistency checks.

[0062] In one embodiment of the present invention, based on step S101, the following will provide a possible embodiment and its specific implementation will be described in a non-limiting manner. Step S101 further includes the following steps: Step S2011: Install a perforated anti-clogging metal cover on the surface of the pressure sensor at the inlet of each dust collector so that large dust particles in the flue gas are blocked by the metal cover and the pressure can be transmitted to the pressure sensor.

[0063] It should be noted that steelmaking flue gas contains a large amount of large dust particles, which can easily clog pressure sensors. The micropores of the anti-clogging metal cover can filter large particles, and the gaps ensure that the pressure field is continuously transmitted to the sensor probe. This avoids direct impact from dust that could damage the sensor, while also maintaining the accuracy of pressure detection, thus enabling stable pressure detection in dusty environments.

[0064] Step S2012: A thermally conductive ceramic sleeve is fitted over the temperature sensing element of the temperature sensor to increase the contact area with the flue gas, so that the temperature sensor can detect the temperature change of the bag filter layer more quickly.

[0065] Step S2013: Match the pressure data collected by the pressure sensor with the standard pressure ranges corresponding to the pre-divided early, middle, and late stages of converter blowing and the heating and holding stages of the refining furnace. The upper and lower limits of the pressure fluctuation range of each stage are the values ​​after adding a 5% margin to the extreme values ​​of the historical normal operating pressure.

[0066] It should be noted that the normal pressure ranges differ between different smelting stages in converters and refining furnaces. By matching the real-time pressure with the standard pressure range of each process stage, pressure anomalies under different operating conditions can be accurately identified, avoiding the misjudgment of normal pressure fluctuations caused by changes in operating conditions as malfunctions.

[0067] Step S2014: Compare the temperature data collected by the temperature sensor with the safe temperature threshold determined by the thermal stability test of each dust collector bag material. The safe temperature threshold is 10-15℃ lower than the temperature at which the bag begins to deform due to heat.

[0068] It should be noted that the filter bag material has a thermal stability limit. If the temperature approaches or exceeds its heat deformation temperature, the filter bag will suffer irreversible damage. By determining the temperature at which the filter bag begins to deform through thermal stability experiments, and then setting a safe temperature threshold 10-15℃ lower than that temperature, an early warning can be given when the filter bag temperature approaches the dangerous value, allowing time for subsequent maintenance and ensuring the filtration performance of the dust collector.

[0069] Step S2015: The fault diagnosis unit combines the stage matching results of pressure data and the threshold comparison results of temperature data. When the pressure data exceeds the standard pressure range of the corresponding smelting stage and the temperature data is close to or exceeds the safe temperature threshold, the dust collector is determined to be in an abnormal health state; if only the pressure data exceeds the range or only the temperature data is close to the threshold, it is determined to be a potential abnormality and an early warning is issued.

[0070] It should be noted that the operation of steelmaking flue gas purification systems is affected by multiple factors such as smelting processes and equipment conditions. A single pressure or temperature parameter cannot accurately determine the health status of the dust collector. The fault diagnosis unit combines the process stage-pressure range matching results of the pressure with the material safety threshold comparison results of the temperature. Through multi-parameter fusion, it can more accurately distinguish between normal operating condition fluctuations and actual / potential faults, reducing false alarms and missed alarms.

[0071] In one embodiment of the present invention, based on step S102, the following will provide a possible embodiment and its specific implementation will be described in a non-limiting manner. Step S102 further includes the following steps: S1021: Based on the real-time inlet pressure, baghouse temperature, fan current, historical maintenance records, flue gas humidity, and dust concentration of each dust collector, calculate the remaining processing capacity of a single dust collector; the remaining capacity is defined as the difference between the maximum flue gas volume that the dust collector can stably operate under the current operating conditions and the actual input flue gas volume, expressed as a percentage.

[0072] It should be noted that the remaining processing capacity calculation incorporates real-time parameters. Optionally, the current inlet pressure of primary dust collector C1 is 1.8 kPa, the bag temperature is 220℃, the fan current is 55A, the last cleaning of primary dust collector C1 was 24 hours ago, the bag design life is 180 days, 120 days have been used, the current flue gas humidity is 8%, and the dust concentration is 15 g / m³. The remaining capacity is calculated by pre-storing the maximum stable flue gas volume under different operating conditions. For example, if the maximum stable flue gas volume of C1 under the current operating conditions is 50,000 m³ / h, and the actual input is 42,000 m³ / h, the remaining capacity = (50,000 - 42,000) / 50,000 × 100% = 16%.

[0073] S1022: Decompose the production plan into stages: converter blowing period, refining power-on period, converter tapping period, and equipment standby period. Mark the corresponding flue gas source, expected duration, and flue gas volume range for each stage. Extract the primary dust collector C1 and secondary dust collector C2 that are available during the blowing period, the tertiary dust collector C3 that is available at all times, and the refining dust collector C4 that is available only during the refining period. Establish the correspondence between production stages and the available capacity of dust collectors.

[0074] It should be noted that the sources and quantities of flue gas differ at different production stages. Through stage matching, high-load flue gas can be preferentially allocated to the primary dust collector C1 / secondary dust collector C2 for full-load operation during the blowing period, while low-load or specific stage flue gas can be allocated to the refining dust collector C4, avoiding equipment overload or idleness caused by cross-stage mixing.

[0075] S1023: Calculate the pressure difference between main pipelines based on the real-time inlet pressure of each main pipeline; By adjusting the opening of the electric valves on the secondary pipelines, the flue gas from the high-pressure main pipeline is diverted to the low-pressure main pipeline, ultimately ensuring that the inlet pressure difference of the four main pipelines is less than or equal to the set threshold. Valve opening adjustments prioritize maintaining stable pressure in the main pipelines after fault isolation; for example, after the primary dust collector C1 is isolated from a fault, the pressure in the main pipeline is maintained within ±300 Pa of the design value. This improves the overall system processing efficiency.

[0076] This embodiment monitors the deviation between the actual flue gas volume and the planned value during the production stage. If the flue gas volume in a certain main pipeline suddenly increases, the opening degree of the electric valve on the corresponding secondary pipeline is reduced, while the fan speed of the main dust collector is increased. If the flue gas volume suddenly decreases, the opening degree of the valve in the secondary pipeline is increased to divert the excess flue gas to the redundant dust collector, and the fan speed of the main dust collector is reduced to the lowest stable value.

[0077] In one embodiment of the present invention, based on step S102, the following will provide a possible embodiment and its specific implementation will be described in a non-limiting manner. Step S102 further includes the following steps: Step S2021: Obtain the blowing process duration of converter one and converter two, as well as the heating process duration of the refining furnace. Based on the historical flue gas generation of each process, determine the total flue gas flow requirement for different time periods.

[0078] It should be noted that the reaction intensity of materials varies within different processes such as converter blowing and refining furnace heating, resulting in differences in the rate and total amount of flue gas generation. By analyzing the correlation between process duration and historical flue gas generation, the total flue gas flow demand at different times can be predicted in advance.

[0079] Step S2022: Detect the remaining percentage of the filter area of ​​each dust collector's bag, and based on the total flue gas flow requirement, preliminarily allocate the proportion of flue gas flow that each dust collector needs to handle.

[0080] It should be noted that the flue gas handling capacity of a dust collector is determined by the filtration area of ​​the filter bags without dust adhering to them. The higher the remaining filtration area, the greater the flue gas flow rate that can be handled. By combining the total flow rate requirement and initially allocating the flow rate ratio according to the remaining filtration area of ​​each dust collector, each dust collector can operate within its own physical capacity.

[0081] Step S2023: According to the initially allocated flue gas flow rate ratio, adjust the opening degree of the electric valves on the corresponding main pipeline and secondary pipeline in a gradient manner, and maintain the preset time after each adjustment to stabilize the flue gas flow.

[0082] It should be noted that the opening degree of the electric valve directly affects the cross-sectional area of ​​flue gas flow. Gradual adjustment can make the flue gas flow change more smoothly and reduce pipeline pressure shock. Maintaining the preset time after adjustment is to allow the flue gas flow in the pipeline to reach dynamic balance and prevent frequent and sudden adjustments of valves and fans from causing system fluctuations.

[0083] Step S2024: Based on the actual flue gas distribution after the electric valve adjustment, the fan speed of each dust collector is adjusted in segments.

[0084] It should be noted that the relationship between fan speed and output air volume is non-linear, but it can be approximated as piecewise linear within a certain range. Each speed range corresponds to a 10% change in flue gas flow rate, which is determined based on the fan performance curve and enables the fan to operate in its high-efficiency range.

[0085] Step S2025: During the adjustment of electric valve and fan speed, continuously monitor the inlet pressure of each dust collector and the temperature of the filter bag. When the pressure fluctuation range is ±2kPa and the temperature fluctuation range is ±5℃, it is determined that the current flue gas flow distribution has reached a stable state.

[0086] It should be noted that the inlet pressure of the dust collector reflects the resistance of flue gas flow in the pipeline, and the temperature of the filter bag reflects the working load of the filter bag. The fluctuation of both directly reflects the stability of the flue gas flow distribution.

[0087] In one embodiment of the present invention, based on step S103, the following will provide a possible embodiment and describe its specific implementation in a non-limiting manner. Step S103 further includes the following steps: S1031: The pressure sensor detects that the inlet pressure of the primary dust collector C1 drops from 1.8 kPa to 1.2 kPa within 5 seconds, indicating that the bag is damaged. The temperature sensor detects that the temperature of a single compartment of the bag layer jumps from 220°C to 350°C within 10 seconds. The fan current transformer monitors that the current returns to zero, triggering the differentiated emergency procedure. It should be noted that under steelmaking conditions, bag filter damage directly leads to flue gas short circuit and unfiltered emission of high-temperature flue gas. Fan failure causes flue gas accumulation in the main pipeline and no power to transport it. Cross-flow between compartments causes abnormal pressure differences between adjacent compartments due to the flow of flue gas across compartments. By using multi-parameter coupling to determine the fault type, the false isolation of non-faulty equipment can be avoided.

[0088] S1032: Close the inlet electric valve of the faulty dust collector, and close the outlet electric valve after a preset delay; open the electric valve of the secondary pipeline connected to the faulty dust collector, and gradually increase the valve opening to the target value at a rate of 10% / s; before the secondary pipeline valve operates, first detect the pressure fluctuation of the corresponding main pipeline to avoid pipeline pressure oscillation and ensure that physical isolation precedes flow distribution.

[0089] S1033: During the flue gas guidance process, the inlet pressure fluctuation value of the dust collector without faults, the temperature variation coefficient of the bag layer, the vibration value of the fan bearing, the actual opening deviation of the secondary pipeline valves, and the infrared temperature of the valve body are collected in real time; when the inlet pressure fluctuation of the dust collector without faults is greater than 15% of the design value or the temperature variation coefficient of the bag layer is greater than 12%, the opening of the secondary pipeline valves is adjusted in the opposite direction until the system pressure and temperature distribution return to the stable range.

[0090] It should be noted that when the secondary dust collector C2 receives flue gas from the primary dust collector C1, if the inlet pressure of the secondary dust collector C2 rises from 1.6 kPa to 1.85 kPa, the opening of the secondary pipeline A1 is reduced by 5%, and the temperature standard deviation / mean value of the secondary dust collector is monitored within 10 seconds. If it rises from 0.1 to 0.15, it is determined that the airflow distribution is uneven. When the temperature exceeds the standard, the opening of the electric valve C21 on the corresponding main pipeline of the secondary dust collector C2 is adjusted by 2%.

[0091] S1034: After fault isolation and flue gas guidance are completed, perform fault isolation effectiveness test; pre-start the no-load warm-up procedure of the standby fan.

[0092] It should be noted that when nitrogen is injected into the inlet of the primary dust collector C1, the data from the outlet pressure sensor of the primary dust collector C1 is detected: if the outlet pressure rises from 0 kPa to above 0.3 kPa within 10 seconds, it is determined that the valve seal of the secondary dust collector has failed, triggering a valve re-closing command; when the secondary dust collector C2 is pre-evaluated at the receiving end, its bag layer vibration frequency is collected. If the current vibration frequency is 18 Hz and shows an upward trend, the remaining acceptable flue gas volume needs to be reduced by 20%.

[0093] It should be noted that the vibration frequency of the filter bag is related to the amount of ash accumulation. The more ash accumulation, the heavier the filter bag, and the lower the vibration frequency. The pre-adjustment of the receiving capacity is to prevent the filter bag from collapsing due to excessive flue gas.

[0094] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0095] It should be understood that when an element or layer is said to be connected or coupled to another element or layer, it may be directly connected or coupled to said other element or layer, or there may be intermediate elements or layers. Conversely, when an element is said to be directly connected or coupled to another element or layer, there are no intermediate elements or layers. Similar figures in all figures indicate similar elements. As used herein, terms and / or include any and all combinations of one or more of the associated listed items.

[0096] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the expression within this document. As used herein, the singular forms "one," "an," and "this" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that, when used in this specification, the terminology includes the presence of the stated feature, integer, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0097] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0098] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of devices, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0099] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the technical solutions of the invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the invention.

[0100] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance system, characterized in that, include: Converter 1, Converter 2, Refining Furnace; The main pipeline connects the converter's secondary dust collector hood to the primary dust collector C1. Electric valves C11 and C12 are installed on the main pipeline. The main pipeline 2 connects to the secondary dust collector hood and secondary dust collector C2 of converter 2. Electric valves C21 and C22 are installed on the main pipeline 2. The main pipeline 3 connects the tertiary dust hood and tertiary dust collector C3 of converter 1 and converter 2. Electric valves C31 and C32 are installed on the main pipeline 3. The main pipeline 4 connects to the dust hood of the refining furnace and the refining dust collector C4. Electric valves C41 and C42 are installed on the main pipeline 4. The secondary pipelines are horizontally connected to the main pipelines one through four, and the connection points with each main pipeline are located inside the dust collector isolation section, forming a four-way interconnected flue gas channel network. Electric valve A1 is installed on the secondary pipeline between main pipeline one and main pipeline two; Electric valve A2 is installed on the secondary pipeline between main pipeline 2 and main pipeline 3; Electric valve A3 is installed on the secondary pipeline between main pipeline one and main pipeline four.

2. The redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance system according to claim 1, characterized in that, The system is configured with a dynamic reconfiguration control module, which includes pressure sensors arranged at the inlet of each dust collector, temperature sensors arranged in the filter bag layer of the dust collector, a fault diagnosis unit for determining the health status of the dust collector, and a load distribution unit for dynamically adjusting the flue gas flow rate according to the production plan and the remaining capacity of the dust collector.

3. The redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance system according to claim 1, characterized in that, It also features a three-dimensional maintenance access system, which includes a detachable walkway covering all main and secondary pipelines, a modular maintenance platform integrated on the electric valve operating side, and an emergency bypass pipeline hidden under the secondary pipelines for temporary flue gas diversion in case of failure.

4. A method for reconfiguration control and uninterrupted collaborative maintenance of a redundant steelmaking flue gas purification system, characterized in that, The method is based on the redundant steelmaking flue gas purification system reconfiguration control and uninterrupted collaborative maintenance system described in claims 1 to 3; The method includes the following steps: Step S101: The pressure data at the inlet of each dust collector is detected in real time by the pressure sensor, and the temperature data of the filter bag layer of each dust collector is detected in real time by the temperature sensor. The fault diagnosis unit judges the health status of the dust collector based on the pressure data and temperature data. Step S102: Based on the production plan and the remaining capacity of the dust collector, dynamically adjust the speed of the electric valves and the corresponding fans to distribute the flue gas flow. Step S103: When the fault diagnosis unit determines that a dust collector is faulty, the dynamic reconfiguration control module performs the following actions: Close the electric valve corresponding to the faulty dust collector to isolate the faulty dust collector; Open the electric valve on the secondary pipeline connected to the faulty dust collector to guide the flue gas corresponding to the faulty dust collector to other available dust collectors for treatment.

5. The method for reconfiguration control and uninterrupted collaborative maintenance of a redundant steelmaking flue gas purification system according to claim 4, characterized in that, In this method, maintenance personnel reach the location of the faulty dust collector via a detachable walkway and a modular maintenance platform, and perform maintenance operations on the faulty dust collector without interrupting production. When performing planned maintenance on a dust collector, the following actions should be taken: Close the electric valve on the main pipeline corresponding to the dust collector; Open the electric valve on the secondary pipeline corresponding to the dust collector, and use the redundant capacity of other dust collectors to process the corresponding flue gas in a coordinated manner, so as to achieve uninterrupted maintenance.

6. The method for reconfiguration control and uninterrupted collaborative maintenance of a redundant steelmaking flue gas purification system according to claim 4, characterized in that, Step S101 also includes the following steps: Pressure sensors are arranged in layers near the inlet and outlet of each dust collector on the main pipeline. Each pressure sensor collects flue gas pressure pulsation values, records the timestamp of the pressure data and the corresponding dust collector's operation identifier, forming a pressure data stream with spatiotemporal markers. Temperature sensor arrays are set at the inlet, middle and outlet of the dust collector bag layer. Each array contains multiple temperature sensors arranged at equal intervals along the flue gas flow direction. The temperature sensors collect the surface temperature of the bag. Flue gas sensors and oxygen sensors are also set to collect the particulate matter concentration and oxygen content in the flue gas. The temperature data of each layer are correlated with the flue gas parameters at the corresponding locations to generate a temperature distribution matrix of the bag layer. Based on the pressure fluctuation pattern and baghouse temperature change trend of the dust collector during normal operation under different production loads, a production load-related feature library is established. Based on external parameters such as the furnace schedule in the current production plan, the flue gas flow rate at the dust collector inlet, and the negative pressure in the furnace, the feature dataset in the pressure-temperature correlation feature library is weighted. After weighting, a real-time judgment threshold is generated. When the inlet pressure of a dust collector or the temperature of the bag layer exceeds the corresponding real-time threshold and the duration exceeds the allowable deviation period under the operating condition, a health status warning is triggered. The pressure and temperature data of the dust collector that triggered the warning were cross-validated with the real-time operating data of other dust collectors in the same system and cross-system related equipment. If the operating parameters of other related devices do not show any abnormal fluctuations, the problem is determined to be a fault in the dust collector itself; otherwise, it is marked as a system-level anomaly and global data tracing is initiated.

7. The method for reconfiguration control and uninterrupted collaborative maintenance of a redundant steelmaking flue gas purification system according to claim 4, characterized in that, Step S101 also includes the following steps: A metal cover with micropores is installed on the surface of the pressure sensor at the inlet of each dust collector to prevent large dust particles in the flue gas from being blocked by the metal cover, so that the pressure can be transmitted to the pressure sensor. A thermally conductive ceramic sleeve is fitted around the temperature sensing element of the temperature sensor to increase the contact area with the flue gas, making the temperature sensor detect temperature changes in the bag filter layer more quickly. The pressure data collected by the pressure sensor is matched with the standard pressure ranges corresponding to the pre-divided early, middle, and late stages of converter blowing and the heating and holding stages of the refining furnace. The upper and lower limits of the pressure fluctuation range of each stage are the values ​​after adding a 5% margin to the extreme values ​​of the historical normal operating pressure. The temperature data collected by the temperature sensor is compared with the safe temperature threshold determined by thermal stability test of each dust collector bag material. The safe temperature threshold is 10-15℃ lower than the temperature at which the bag begins to deform. The fault diagnosis unit combines the stage matching results of pressure data and the threshold comparison results of temperature data. When the pressure data exceeds the standard pressure range of the corresponding smelting stage and the temperature data is close to or exceeds the safe temperature threshold, the dust collector is determined to be in an abnormal health state. If only the pressure data exceeds the range or only the temperature data is close to the threshold, it is determined to be a potential abnormality and an early warning is issued.

8. The method for reconfiguration control and uninterrupted collaborative maintenance of a redundant steelmaking flue gas purification system according to claim 4, characterized in that, Step S102 also includes the following steps: Based on the real-time inlet pressure, bag temperature, fan current, historical maintenance records, flue gas humidity, and dust concentration of each dust collector, the remaining processing capacity of a single dust collector is calculated. The remaining capacity is defined as the difference between the maximum flue gas volume that the dust collector can stably operate under the current operating conditions and the actual input flue gas volume, expressed as a percentage. The production plan is broken down into stages: converter blowing period, refining power-on period, converter tapping period, and equipment standby period. Each stage is marked with the corresponding flue gas source, expected duration, and flue gas volume range. The primary dust collector C1 and secondary dust collector C2 are available during the blowing period, the tertiary dust collector C3 is available at all times, and the refining dust collector C4 is available only during the refining period. A correspondence between production stages and the available capacity of dust collectors is established. Calculate the pressure difference between the main pipelines based on the real-time inlet pressure of each main pipeline.

9. The method for reconfiguration control and uninterrupted collaborative maintenance of a redundant steelmaking flue gas purification system according to claim 4, characterized in that, Step S102 also includes the following steps: Obtain the blowing process duration of converter 1 and converter 2, as well as the heating process duration of the refining furnace. Based on the historical flue gas generation of each process, determine the total flue gas flow rate requirement for different time periods. The remaining percentage of the filter area of ​​each dust collector's bag is detected, and based on the total flue gas flow requirement, the proportion of flue gas flow that each dust collector needs to handle is initially allocated. According to the initially allocated flue gas flow ratio, the electric valves on the corresponding main pipeline and secondary pipeline are adjusted in a gradient manner, and the valves are kept for a preset time after each adjustment to stabilize the flue gas flow. Based on the actual flue gas distribution after the electric valve adjustment, the fan speed of each dust collector is adjusted in stages. During the adjustment of electric valves and fan speeds, the inlet pressure of each dust collector and the temperature of the filter bag are continuously monitored. When the pressure fluctuation range is ±2kPa and the temperature fluctuation range is ±5℃, the current flue gas flow distribution is determined to have reached a stable state.

10. The method for reconfiguration control and uninterrupted collaborative maintenance of a redundant steelmaking flue gas purification system according to claim 4, characterized in that, Step S103 also includes the following steps: The pressure sensor detects that the inlet pressure of the primary dust collector C1 drops from 1.8 kPa to 1.2 kPa within 5 seconds, indicating that the filter bag is damaged. The temperature sensor detects that the temperature of a single compartment of the filter bag layer jumps from 220°C to 350°C within 10 seconds. The fan current transformer monitors that the current returns to zero, triggering a differentiated emergency procedure. Close the inlet electric valve of the faulty dust collector, and close the outlet electric valve after a preset delay; open the electric valve of the secondary pipeline connected to the faulty dust collector, and gradually increase the valve opening to the target value at a rate of 10% / s. During the flue gas guidance process, the inlet pressure fluctuation value of the dust collector without faults, the temperature variation coefficient of the bag layer, the vibration value of the fan bearing, the actual opening deviation of the secondary pipeline valves, and the infrared temperature of the valve body are collected in real time. When the inlet pressure fluctuation of the dust collector without faults is greater than 15% of the design value or the temperature variation coefficient of the bag layer is greater than 12%, the opening of the secondary pipeline valves is adjusted in the opposite direction until the system pressure and temperature distribution return to the stable range. After fault isolation and flue gas guidance are completed, the effectiveness of fault isolation is tested; the no-load warm-up procedure for the standby fan is pre-started.

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