Dust removal port valve regulation and control method and system based on oxygen content analysis

Abstract

The embodiment of the invention provides a dust removal port valve regulation and control method and system based on oxygen content analysis, and belongs to the technical field of valve regulation and control. The method comprises the following steps: receiving oxygen concentration data transmitted by an oxygen analyzer and dust removal pipeline pressure data transmitted by a pressure transmitter in a preset sampling period; calculating the change rate of the oxygen content in unit time by using a first-order difference method; according to the change rate of the oxygen content, calculating an oxygen change rate dynamic safety threshold based on a historical oxygen content change trend and process parameters; judging the sudden change trend of the oxygen concentration; and on the basis of the judgment result of the oxygen concentration sudden change trend, dust removal port valve regulation and control are executed. Accurate oxygen content real-time monitoring is introduced in the area near the furnace cover of the refining furnace, linkage with an advanced valve regulation and control executing mechanism is achieved, and a set of closed-loop automatic control system is constructed. The industrial pain point of secondary oxidation of the molten steel is effectively solved, and the quality of the molten steel and the product performance are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve control, and particularly relates to a dust outlet valve control method and system based on oxygen content analysis. BACKGROUND

[0002] In the steel smelting process, the operation status of the refining furnace has a crucial influence on the quality of the molten steel. In the traditional refining furnace system, the monitoring means for the gas composition in the furnace is relatively scarce. Especially in the area near the furnace cover of the refining furnace, the detection of the gas composition has been in a blank state. This leads to the fact that in actual operation, the valve opening of the dust outlet can only be adjusted according to experience, and cannot be dynamically controlled according to the changes of the gas composition in the furnace.

[0003] Due to the unreasonable valve opening of the dust outlet, the secondary oxidation of the molten steel often occurs. The secondary oxidation of the molten steel introduces impurities, which affects the purity of the molten steel and the performance of the final product, such as mechanical strength, corrosion resistance, etc. At the same time, the unreasonable valve opening can also cause energy waste, increase the smelting cost, and may cause unnecessary pollution to the environment. Therefore, it is urgent to provide a device that can accurately detect the gas composition near the furnace cover of the refining furnace and effectively control the valve opening of the dust outlet, so as to solve the problems in the prior art and improve the quality and efficiency of the steel smelting. SUMMARY

[0004] The purpose of the present application is to provide a dust outlet valve control method and system based on oxygen content analysis, which is used to solve the problem of insufficient gas composition monitoring in the existing refining furnace system and inaccurate control of the valve opening of the dust outlet, which leads to secondary oxidation of the molten steel.

[0005] In order to achieve the above-mentioned purpose, the present application provides a dust outlet valve control method based on oxygen content analysis, comprising: receiving the oxygen concentration data transmitted by the oxygen analyzer and the dust pipe pressure data transmitted by the pressure transmitter at a preset sampling period; using the first-order difference method to calculate the change rate of the oxygen content per unit time; calculating the oxygen change rate dynamic safety threshold based on the historical oxygen content change trend and the process parameters according to the change rate of the oxygen content; judging the oxygen concentration mutation trend according to the change rate of the oxygen content and the oxygen change rate dynamic safety threshold; executing the dust outlet valve control based on the result of the oxygen concentration mutation trend judgment.

[0006] Optionally, receiving oxygen concentration data transmitted by the oxygen analyzer and dust removal pipeline pressure data transmitted by the pressure transmitter at a preset sampling period includes: initializing a communication protocol and setting a fixed sampling period; buffering the received oxygen concentration data and dust removal pipeline pressure data to a data receiving buffer according to a time stamp; performing preliminary checking on the oxygen concentration data and the dust removal pipeline pressure data in the data receiving buffer and performing outlier filtering processing.

[0007] Optionally, calculating the oxygen content change rate per unit time using a first-order difference method includes: extracting oxygen concentration data at a current time point and oxygen concentration data at a previous sampling time from the data receiving buffer after the outlier filtering processing; calculating the oxygen content change rate per unit time using a first-order difference method; buffering the calculated oxygen content change rate per unit time to an oxygen content change rate time series queue according to a time stamp; and updating the oxygen content change rate time series queue using a first-in-first-out strategy.

[0008] Optionally, calculating an oxygen change rate dynamic safety threshold based on historical oxygen content change trends and process parameters according to the oxygen content change rate includes: extracting historical oxygen content change rate data from the oxygen content change rate time series queue according to a set historical data window length; performing exponential moving average filtering on the extracted historical oxygen content change rate data; determining a sensitivity weight according to spatial coordinates of the monitoring point; and determining a process baseline threshold according to a current smelting stage.

[0009] Optionally, determining a process baseline threshold according to a current smelting stage includes: determining a current process stage according to a process signal, and retrieving a process stage basic threshold of the current stage from a pre-stored process parameter library; determining a position compensation coefficient according to spatial coordinates of the monitoring point and an effective monitoring radius of the furnace cover; performing coordinate normalization on the monitoring point coordinates and the effective monitoring radius of the furnace cover; and calculating a process baseline threshold based on the process stage basic threshold, the position compensation coefficient, and the normalized coordinates.

[0010] Optionally, judging an oxygen concentration mutation trend according to the oxygen content change rate and the oxygen change rate dynamic safety threshold includes: performing validity checking and time stamp continuity verification on the oxygen content change rate and the oxygen change rate dynamic safety threshold; and comparing the oxygen content change rate with the oxygen change rate dynamic safety threshold to judge the oxygen concentration mutation trend.

[0011] Optionally, the comparison of the oxygen content change rate with the oxygen change rate dynamic safety threshold is used to determine the oxygen concentration mutation trend, including: when the oxygen content change rate is greater than the oxygen change rate safety threshold, it is determined that the current smelting process has an oxygen concentration mutation trend; when the oxygen content change rate is less than or equal to the oxygen change rate safety threshold, it is determined that the current smelting process does not have an oxygen concentration mutation trend.

[0012] Optionally, the dust removal port valve control is executed based on the result of the oxygen concentration mutation trend determination, including: judging whether the dust removal pipeline pressure exceeds the safety range according to the current dust removal pipeline pressure data, if it exceeds, the pressure grading control is preferentially executed, if it does not exceed, the oxygen control mode is executed according to the result of the oxygen concentration mutation trend determination.

[0013] Optionally, the oxygen control mode includes: calculating the valve target opening degree according to the deviation of the oxygen content change rate and the oxygen change rate safety threshold; determining the dust removal port valve adjustment direction according to the deviation of the oxygen content change rate and the oxygen change rate safety threshold; generating a valve control signal according to the valve target opening degree and the dust removal port valve adjustment direction, and driving the dust removal port valve control execution mechanism to perform dust removal port valve control.

[0014] In another aspect, the application provides a dust removal port valve control method based on oxygen content analysis, which is used to realize the dust removal port valve control method based on oxygen content analysis, and the system includes a data receiving module for receiving oxygen concentration data transmitted by an oxygen analyzer and dust removal pipeline pressure data transmitted by a pressure transmitter at a preset sampling period; a first calculation module for calculating the change rate of oxygen content per unit time using a first-order difference method; a second calculation module for calculating an oxygen change rate dynamic safety threshold based on historical oxygen content change trend and process parameters according to the change rate of oxygen content; a judgment module for determining the oxygen concentration mutation trend according to the change rate of oxygen content and the oxygen change rate dynamic safety threshold; and a valve control module for executing dust removal port valve control based on the result of the oxygen concentration mutation trend determination.

[0015] The above technical solution introduces precise oxygen content real-time monitoring in the vicinity of the refining furnace cover, and is linked with an advanced valve control execution mechanism to build a closed-loop automatic control system. The steel secondary oxidation problem is effectively solved, and the steel quality and product performance are significantly improved. At the same time, the device realizes dynamic, accurate and automatic control of the dust removal port valve opening degree, which brings comprehensive benefits in improving production stability and automation level.

[0016] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and serve to explain the principles of the application, but are not intended to limit the application. In the drawings: Figure 1 is a flow chart of a dust outlet valve control method based on oxygen content analysis.

[0018] Figure 2 is a flow chart of oxygen change rate dynamic safety threshold calculation. DETAILED DESCRIPTION

[0019] The specific embodiments of the present application will be described below with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 2 The specific embodiments of the present application will be described below with reference to the accompanying drawings.

[0020] It should be noted that the acquisition, transmission, storage, use, processing, etc. of data in the technical solutions of the present application comply with relevant provisions of national laws and regulations. In the embodiments of the present application, some existing industry solutions may be mentioned, such as software, components, models, etc. They should be considered as exemplary, and their purpose is only to illustrate the feasibility of the implementation of the technical solutions of the present application, but it does not mean that the applicant has or will necessarily use the solution.

[0021] The present inventors found in the process of implementing the present application that the valve opening of the dust outlet in the prior art can only be adjusted by experience, and cannot be dynamically controlled according to the change of the gas composition in the furnace. Therefore, the phenomenon of secondary oxidation of molten steel often occurs.

[0022] Embodiment 1 Referring to Figures 1-2 As a first embodiment of the present application, the embodiment provides a dust outlet valve control method based on oxygen content analysis, comprising: S100: receiving oxygen concentration data transmitted by an oxygen analyzer and dust pipe pressure data transmitted by a pressure transmitter at a preset sampling period; Further, the communication protocol is initialized, and a fixed sampling period is set. The received oxygen concentration data and dust pipe pressure data are cached to a data receiving buffer according to the time stamp. The oxygen concentration data and the dust pipe pressure data in the data receiving buffer are preliminarily checked, and abnormal value filtering processing is performed.

[0023] Specifically, first, a gas sampling installation hole is opened in the edge area of the refining furnace cover, and the high-temperature probe of the oxygen content analyzer is inserted through the hole to face the gas mixing area near the furnace cover. The probe is connected to the oxygen content analyzer host through a high-temperature airtight connection structure, and the oxygen content analyzer host is installed near the furnace body, which can be provided with a protection box to ensure its safe operation. A standard pressure tapping is provided in the middle section of the dust removal main pipeline, and a pressure transmitter is installed at this position and sealed connected with the pipeline through welding or flange to ensure the accuracy of measurement. The main controller is installed in the control console or PLC control box and is electrically connected with the oxygen content analyzer host, the pressure transmitter and the regulator controller through industrial communication cables. After the main controller is powered on, it enters the initialization state, loads the corresponding industrial protocol stack (such as Modbus) of the device, loads the algorithm, the space disturbance coefficient table and the process upper / lower limit set value and other control parameters.

[0024] Further, after initialization is completed, the main controller enters the running state, and the oxygen content analyzer starts to continuously collect the oxygen concentration data of the gas near the furnace cover at a preset sampling period, and transmits the data to the main controller in real time through the communication interface. At the same time, the pressure transmitter synchronously collects the pressure value inside the dust removal pipeline. The main controller reads the original data frames transmitted by the oxygen analyzer and the pressure transmitter, analyzes the effective value field (oxygen concentration value, pressure value), and adds a timestamp to the data to record the time when the data is generated. The data packet with the timestamp is written into the buffer area.

[0025] Preferably, the buffer area is set with a fixed capacity, and an overflow warning is triggered when new data covers the oldest data. The buffer area provides thread-safe access locks to prevent multi-thread conflicts.

[0026] Further, the received data is preliminarily checked to confirm that the oxygen concentration value is in a physically reasonable range and the pressure value is in a normal working range of the dust removal pipeline. The change rate of the data of adjacent sampling points is calculated, and if it exceeds a preset mutation threshold (such as 5% / s for oxygen concentration and 2kPa / s for pressure), it is marked as suspicious data. The state register returned by the device is analyzed to filter abnormal state data such as sensor failure and out-of-range, and the CRC (Cyclic Redundancy Check) code of the data frame is verified, and the data packet with failed verification is discarded.

[0027] Preferably, the data that passes the preliminary check is subjected to secondary filtering, and a sliding window algorithm (such as a window size of 5 groups of data) is used to calculate the mean and standard deviation of the data in the window in real time. If the deviation of the current data from the mean exceeds 3 times the standard deviation (3 Principles), it is determined as an abnormal value. The abnormal value is removed, and data repair is completed through linear interpolation or forward valid value filling. When continuous abnormal over-limit occurs, a sensor failure alarm is triggered. The effective data after verification and filtering is transmitted to the subsequent calculation module in chronological order, and the whole process needs to be completed within a single sampling period.

[0028] Preferably, the above technical solution ensures high reliability of data, improves anti-interference ability, eliminates sensor noise and transient fluctuation interference by periodically collecting oxygen concentration and pipeline pressure data, combining time stamp alignment, protocol verification and sliding window anomaly filtering, while communication protocol initialization and buffer management guarantee continuous and stable operation under industrial network, providing real-time and clean data basis for subsequent analysis.

[0029] S200: Calculate the change rate of oxygen content per unit time using first-order difference method.

[0030] Further, extract the oxygen concentration data at the current time point and the oxygen concentration data at the previous sampling time from the data receiving buffer after abnormal value filtering processing; calculate the change rate of oxygen content per unit time using first-order difference method; cache the calculated change rate of oxygen content to oxygen content change rate time sequence queue according to time stamp; update the oxygen content change rate time sequence queue using first-in-first-out strategy.

[0031] Specifically, from the effective data pool of the data receiving buffer, extract the oxygen concentration data at the current time point (all data marks the time when the oxygen content analyzer completes measurement, and ignores the delay) and the oxygen concentration data at the previous sampling time according to time stamp order, calculate the change rate of oxygen content per unit time by first-order difference method, and the calculation formula of the change rate of oxygen content is as follows:

[0032] Wherein, represents the oxygen concentration value measured at time point t and spatial position x, represents the oxygen concentration the instantaneous change rate at time point t and position x, represents the oxygen concentration value measured at the previous sampling time at the same position x, represents the time interval, i.e. the time difference between two consecutive samplings, t represents the sampling time stamp, and x represents the spatial coordinate position of the monitoring point (the position of the oxygen analyzer probe). When x=0, it means that the monitoring point is in the vertical projection area of the geometric center point of the furnace cover on the steel liquid surface. When x=1, it means that the monitoring point is located in the edge area of the refining furnace cover.

[0033] Further, the change rate of oxygen content per unit time reflects the change trend of the current furnace cover area oxygen concentration, which is an important reference index for judging the strength of atmosphere disturbance and the risk of molten steel oxidation in the smelting process. After the calculation of the change rate of oxygen content per unit time, the change rate and the current time stamp are bound as a data pair, written into the oxygen content change rate time sequence queue, and the queue is strictly maintained according to the first-in-first-out strategy.

[0034] Preferably, the above technical solution is based on the oxygen concentration data of adjacent sampling points, uses high-efficiency first-order difference method to calculate the change rate in real time, and dynamically updates the oxygen content change rate time sequence queue. The process disturbance trend can be accurately quantified, the instantaneous abnormality can be captured with extremely low calculation complexity, and a rolling historical data pool is constructed to provide real-time response capability for oxygen change rate dynamic safety threshold calculation.

[0035] S300: According to the change rate of the oxygen content, based on the historical oxygen content change trend and the process parameters, the oxygen change rate dynamic safety threshold is calculated.

[0036] Further, the change rate data of the historical oxygen content is extracted from the oxygen content change rate time sequence queue according to the set historical data window length; the extracted change rate data of the historical oxygen content is subjected to exponential moving average filtering; the sensitivity weight is determined according to the spatial coordinates of the monitoring point; and the process baseline threshold is determined according to the current smelting stage.

[0037] Further, the current process stage is determined according to the process signal, the process stage basic threshold of the current stage is called from the pre-stored process parameter library, the position compensation coefficient is determined according to the spatial coordinates of the monitoring point and the effective monitoring radius of the furnace cover, the coordinates of the monitoring point are normalized with the effective monitoring radius of the furnace cover, and the process baseline threshold is calculated based on the process stage basic threshold, the position compensation coefficient and the normalized coordinates.

[0038] Specifically, when the oxygen concentration is in an upward trend, in order to avoid that the fixed threshold cannot adapt to the fluctuation characteristics of different working condition stages, the main controller calculates the oxygen change rate safety threshold according to the historical oxygen content change trend .

[0039] The calculation formula of the oxygen change rate safety threshold is as follows:

[0040] wherein, represents the oxygen change rate safety threshold, represents the sensitivity weight of the position x to the oxygen change rate, represents the exponential moving average filtering of the oxygen content change rate, represents the process baseline threshold, which is the allowed minimum safety margin of the position x in a specific process stage.

[0041]

[0042] wherein, represents the sensitivity weight of the position x to the oxygen change rate, represents the spatial attenuation amplitude coefficient, which is determined by the CFD flow field non-uniformity and the measured noise regression. Sensitivity spatial decay rate, obtained by fitting response time ratio of disturbance test, c represents global sensitivity reference offset, calculated by safety margin of sensor accuracy / process fluctuation limit.

[0043] When the oxygen concentration is in an upward trend, i.e. The calculation formula of the process baseline threshold value is as follows:

[0044] wherein, indicates the process baseline threshold value, indicates a process stage basic threshold value, determined by statistical history data and metallurgical mechanism model (such as high threshold value for oxidation prevention in the blowing period and low threshold value for safety protection in the tapping period); indicates a position compensation coefficient, which is a failure risk degree of the monitoring point, the closer to the edge of the furnace cover, the greater the influence of cold wind suction and dust accumulation, and the lower the data reliability, the edge area > 0, the central stable area ≈ 0; indicates a normalized coordinate maximum value, taking the effective monitoring radius of the furnace cover (the physical size is mapped to x = 1 as an engineering convention).

[0045] It should be noted that when the oxygen concentration is in a downward trend, the secondary oxidation of molten steel is generally not increased.

[0046] Preferably, the above technical scheme calculates the oxygen change rate safety threshold value through the triple synergistic mechanism of spatial sensitivity compensation, process stage adaptation and data reliability correction, dynamically calls the process reference threshold value according to the current smelting stage, and accurately matches the differentiated requirements of high alert in the blowing period or safety protection in the tapping period; the oxygen mutation risk judgment is more accurate.

[0047] S400: According to the change rate of the oxygen content and the oxygen change rate dynamic safety threshold value, the oxygen concentration mutation trend is judged.

[0048] Further, the change rate of the oxygen content and the oxygen change rate dynamic safety threshold value are checked for effectiveness and verified for time stamp continuity; the change rate of the oxygen content is compared with the oxygen change rate dynamic safety threshold value, and the oxygen concentration mutation trend is judged.

[0049] Further, when the change rate of the oxygen content is greater than the oxygen change rate safety threshold value, it is judged that the current smelting process has an oxygen concentration mutation trend; when the change rate of the oxygen content is less than or equal to the oxygen change rate safety threshold value, it is judged that the current smelting process does not have an oxygen concentration mutation trend.

[0050] Specifically, the main controller compares the absolute value of the current oxygen change rate with the dynamic prediction threshold at the corresponding location. When the rate of change of oxygen content exceeds the safe threshold for oxygen change rate (i.e., > If a sudden change in oxygen concentration is detected during the current smelting process, it indicates a high risk of secondary oxidation due to corrosion of the molten steel surface by high oxygen content. If this detection is confirmed, the main controller immediately sends an abnormal trend trigger signal, initiating the valve regulation process. If the process does not exceed the specified limits, the monitoring status is maintained, awaiting the next cycle's assessment.

[0051] Preferably, the above technical solution can achieve accurate early risk identification by judging the trend of sudden changes in oxygen concentration, reduce the false judgment rate, and trigger regulation only when there is a real threat to the quality of molten steel.

[0052] S500: Based on the result of the judgment of the sudden change trend of oxygen concentration, the dust removal port valve is adjusted.

[0053] Furthermore, based on the current dust removal pipeline pressure data, it is determined whether the dust removal pipeline pressure exceeds the safe range. If it does, pressure tiered control is implemented first. If it does not exceed the safe range, oxygen control mode is implemented based on the oxygen concentration change trend.

[0054] Furthermore, the oxygen control mode includes: calculating the target valve opening based on the deviation between the rate of change of oxygen content and the safe threshold of oxygen change rate; determining the adjustment direction of the dust collector valve based on the deviation between the rate of change of oxygen content and the safe threshold of oxygen change rate; and generating a valve control signal based on the target valve opening and the adjustment direction of the dust collector valve to drive the dust collector valve control actuator to control the dust collector valve.

[0055] Specifically, read the current pressure value of the dust collection pipeline. If the detected dust removal pipeline pressure value If the pressure exceeds the set safety range, pressure grading control will be implemented first. When When the pressure is below the lower limit of the set pressure range, the control valve opening increases by 15%-20%. When the pressure exceeds the upper limit of the set pressure range, the valve opening is reduced by 10%-12%. If the pressure is ≥9 kPa (near the critical overpressure), the valve's current opening will be locked and the pressure relief valve will be activated.

[0056] Furthermore, when Within the set safety range, oxygen control mode is executed. First, the target valve opening is calculated based on the deviation between the rate of change of oxygen content and the safe threshold for the rate of change of oxygen content. The formula for calculating the target valve opening is as follows:

[0057] in, represents the target opening degree of the valve, represents the current actual opening degree of the valve, represents the adjustment sensitivity coefficient.

[0058]

[0059] wherein, represents the full stroke time of the valve from full closing to full opening, and 20 is an optimal proportional constant of the valve response and the process time scale summarized in engineering practice, which can be modified according to the valve model.

[0060] Further, the difference between the change rate of the oxygen content and the oxygen change rate safety threshold is calculated, and when when > 0, the dust outlet valve adjustment direction is to close the valve, and the action of reducing the valve opening degree is performed; when when < 0, the dust outlet valve adjustment direction is to open the valve, and the action of increasing the valve opening degree is performed.

[0061] Preferably, the opening degree change rate is limited to ±5% / s to avoid over-shooting of the actuator, and when less than the dead zone threshold 0.5% / s, the valve opening degree is maintained unchanged, and when the pressure fluctuation < 0.2kPa, the valve does not act. The valve opening degree is limited to [10%, 90%] (to ensure safe working conditions).

[0062] Further, the main controller will generate a standardized valve position control instruction signal according to the valve target opening degree and the dust outlet valve adjustment direction, and transmit it to the regulating valve controller through the industrial bus; the regulating valve controller analyzes this signal and converts it into a PWM driving waveform to drive the regulating valve controller to perform valve closing or opening operation to the target opening degree, thereby accurately adjusting the exhaust volume in the furnace to restore the oxygen concentration to a reasonable range.

[0063] Preferably, after the valve adjustment action is completed, the next round of data acquisition and processing cycle is continued. The oxygen content analyzer and the pressure transmitter collect real-time data again, and the main controller re-executes the steps of oxygen content change rate calculation, oxygen change rate dynamic safety threshold calculation, trend judgment and adjustment control, etc., to form a complete closed loop. The continuous operation of this process can realize real-time dynamic adjustment of the dust outlet valve opening degree, keep the oxygen concentration change in the refining process within a controllable range, effectively inhibit the secondary oxidation of molten steel, and improve the product quality and smelting efficiency.

[0064] Preferably, the above technical solution adopts a pressure safety priority strategy, i.e., when the pressure is too high, the pressure is controlled in stages, and when the pressure is not too high, the oxygen control mode is entered, the target opening degree is calculated, and the dust outlet valve opening degree is accurately controlled through the direction control, thereby effectively controlling the exhaust of the gas in the furnace and reducing the risk of secondary oxidation of the molten steel.

[0065] The application further provides a dust outlet valve regulation system based on oxygen content analysis, which is used for implementing a dust outlet valve regulation method based on oxygen content analysis.

[0066] The application provides a storage medium, which stores a program, and the program is executed by a processor to implement the dust outlet valve regulation method based on oxygen content analysis.

[0067] The application provides a processor, which is used for running a program, and the program is executed to implement the dust outlet valve regulation method based on oxygen content analysis.

[0068] The application provides a device, which comprises a processor, a memory, and a program stored in the memory and capable of being run on the processor, and the processor implements the dust outlet valve regulation method based on oxygen content analysis when the program is executed. The device herein can be a server, a PC, a PAD, a mobile phone, or the like.

[0069] The application further provides a computer program product, which is suitable for executing the dust outlet valve regulation method based on oxygen content analysis when executed on a data processing device.

[0070] Those skilled in the art should understand that embodiments of the application can provide methods, systems, or computer program products. Therefore, the application can adopt a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the application can adopt a computer program product in the form of being implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program codes.

[0071] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flow or blocks Figure 1 one or more flow or blocks

[0072] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks. Figure 1 one or more flow or blocks Figure 1 one or more flow or blocks

[0073] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flow or blocks Figure 1 one or more flow or blocks

[0074] In one typical configuration, the computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0075] The memory can include non-persistent memory and / or persistent memory, such as flash memory, read-only memory (ROM), and / or volatile or non-volatile random access memory (RAM), among others. The memory is an example of computer readable media.

[0076] Computer-readable media includes permanent and non-permanent, movable and non-movable media that can implement information storage by any method or technology. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible to a computing device. According to the definition herein, computer-readable media does not include transitory media such as modulated data signals and carriers.

[0077] It should also be noted that the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or apparatus that includes a list of elements does not only include those elements, but also includes other elements not explicitly listed, or further includes elements inherent in such a process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.

[0078] The above only is an embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A method for regulating a dust collector inlet valve based on oxygen content analysis, characterized in that, include: It receives oxygen concentration data transmitted by the oxygen analyzer and dust removal pipeline pressure data transmitted by the pressure transmitter at a preset sampling period. The rate of change of oxygen content per unit time was calculated using the first-order difference method. Based on the rate of change of oxygen content, and taking into account historical trends in oxygen content change and process parameters, a dynamic safety threshold for the rate of change of oxygen content is calculated. Based on the rate of change of oxygen content and the dynamic safety threshold of oxygen change rate, the trend of sudden changes in oxygen concentration is judged; Based on the results of the oxygen concentration change trend judgment, the dust removal port valve is adjusted.

2. The method for controlling the dust collector valve based on oxygen content analysis according to claim 1, characterized in that, It receives oxygen concentration data transmitted from the oxygen analyzer and dust collection pipeline pressure data transmitted from the pressure transmitter at a preset sampling period, including: Perform communication protocol initialization and set a fixed sampling period; The received oxygen concentration data and dust removal pipeline pressure data are cached in the data receiving buffer according to the timestamp. The oxygen concentration data and the dust removal pipeline pressure data in the data receiving buffer are initially verified, and outlier filtering is performed.

3. The method for controlling the dust collector valve based on oxygen content analysis according to claim 1, characterized in that, The rate of change of oxygen content per unit time is calculated using the first-order difference method, including: Extract the oxygen concentration data at the current time point after outlier filtering and the oxygen concentration data at the previous sampling time from the data receiving buffer; The rate of change of oxygen content per unit time was calculated using the first-order difference method. The calculated rate of change of oxygen content is cached in a time series queue of oxygen content change rate according to timestamps; The oxygen content change rate time series queue is updated using a first-in-first-out (FIFO) strategy.

4. The method for controlling the dust collector valve based on oxygen content analysis according to claim 3, characterized in that, The step of calculating the dynamic safety threshold for oxygen change rate based on the rate of change of oxygen content, historical oxygen content change trends, and process parameters includes: Historical oxygen content change rate data are extracted from the time series queue of oxygen content change rate based on the set historical data window length. The extracted historical oxygen content change rate data were filtered using an exponential moving average. Sensitivity weights are determined based on the spatial coordinates of the monitoring points; Determine the process baseline threshold based on the current smelting stage.

5. The method for controlling the dust collector valve based on oxygen content analysis according to claim 4, characterized in that, The determination of the process baseline threshold based on the current smelting stage includes: The current process stage is determined based on the process signal, and the basic threshold of the current process stage is retrieved from the pre-stored process parameter library. The position compensation coefficient is determined based on the spatial coordinates of the monitoring points and the effective monitoring radius of the furnace cover; The coordinates of the monitoring points are normalized to the effective monitoring radius of the furnace cover; The process baseline threshold is calculated based on the basic threshold of the process stage, the position compensation coefficient, and the normalized coordinates.

6. The method for controlling the dust collector valve based on oxygen content analysis according to claim 1, characterized in that, The step of determining the trend of sudden changes in oxygen concentration based on the rate of change of oxygen content and the dynamic safety threshold of the rate of change of oxygen includes: The effectiveness of the rate of change of oxygen content and the dynamic safety threshold of the oxygen change rate are verified and the timestamp continuity is validated. The rate of change of oxygen content is compared with the dynamic safety threshold of oxygen change rate to determine the trend of sudden changes in oxygen concentration.

7. The method for controlling the dust collector valve based on oxygen content analysis according to claim 6, characterized in that, The step of comparing the rate of change of oxygen content with the dynamic safety threshold of oxygen change rate to determine the trend of sudden changes in oxygen concentration includes: When the rate of change of oxygen content exceeds the safe threshold for the rate of change of oxygen, it is determined that there is a sudden trend of oxygen concentration change in the current smelting process. When the rate of change of oxygen content is less than or equal to the safe threshold for the rate of change of oxygen, it is determined that there is no sudden trend in oxygen concentration in the current smelting process.

8. The method for controlling the dust collector valve based on oxygen content analysis according to claim 1, characterized in that, The process of adjusting the dust collection port valve based on the result of the oxygen concentration change trend judgment includes: determining whether the dust collection pipeline pressure exceeds the safe range based on the current dust collection pipeline pressure data; if it exceeds the safe range, then priority is given to pressure graded control; if it does not exceed the safe range, then oxygen control mode is executed based on the result of the oxygen concentration change trend judgment.

9. The method for controlling the dust collector valve based on oxygen content analysis according to claim 8, characterized in that, The oxygen control mode includes: The target valve opening is calculated based on the deviation between the rate of change of oxygen content and the safe threshold for the rate of change of oxygen content. The adjustment direction of the dust collector valve is determined based on the deviation between the rate of change of oxygen content and the safe threshold for the rate of change of oxygen content. Based on the target valve opening and the adjustment direction of the dust collector valve, a valve control signal is generated to drive the dust collector valve control actuator to control the dust collector valve.

10. A system employing the dust collector inlet valve control method based on oxygen content analysis as described in any one of claims 1-9, characterized in that, include: The data receiving module is used to receive oxygen concentration data transmitted by the oxygen analyzer and dust removal pipeline pressure data transmitted by the pressure transmitter at a preset sampling period. The first calculation module is used to calculate the rate of change of oxygen content per unit time using the first-order difference method. The second calculation module is used to calculate the dynamic safety threshold of oxygen change rate based on the rate of change of oxygen content, historical oxygen content change trends and process parameters. The judgment module is used to judge the sudden change trend of oxygen concentration based on the rate of change of oxygen content and the dynamic safety threshold of oxygen change rate; The valve control module is used to control the dust collector valve based on the result of the judgment of the sudden change trend of oxygen concentration.

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