A control system and method for deCOing of sintering flue gas

Abstract

The present invention belongs to the technical field of sintering flue gas deCO control, and discloses a control system and method for sintering flue gas deCO. The present invention configures an adjustable angle guide plate array at the flue inlet, and dynamically adjusts the guide plate angle based on the flue gas flow distribution data, so that the flue gas entering the subsequent module is more uniform, the deCO effect is improved, the stable operation of the system is ensured, the equipment loss is reduced, the impact of uneven flue gas on the equipment is reduced, the equipment life is extended, and energy waste is reduced. The present invention dynamically adjusts the gas supply based on the collected temperature data and CO concentration data. This analysis method can accurately match the reaction requirements, ensure that CO is fully oxidized, and improve the removal efficiency. At the same time, it can achieve energy saving and consumption reduction, avoid gas waste or insufficient supply, reduce production costs, maintain stable system operation, ensure that the reaction temperature is in an appropriate range, extend the service life of the catalyst, and reduce equipment maintenance costs.

Description

Technical Field

[0001] The invention belongs to the technical field of sintering flue gas deCO control and relates to a sintering flue gas deCO control system and method. Background Art

[0002] Sintering flue gas decarbonization (CO) is a key environmentally friendly treatment technology used in the steel industry's sintering process. It aims to reduce the carbon monoxide (CO) content in sintering flue gas and minimize its environmental pollution. Sintering processes are complex, and without proper control, optimal reaction conditions at each stage can be difficult to achieve, leading to fluctuations in CO removal efficiency. Precise control allows for optimal resource allocation, improves catalyst utilization, reduces energy consumption, and mitigates the risk of equipment damage caused by reaction anomalies, ensuring safe and stable system operation. Therefore, research on control methods for sintering flue gas decarbonization is of great significance.

[0003] Prior art also includes technical solutions for sintering flue gas CO removal control technology. For example, the Chinese invention patent application with publication number CN118904071A describes a method for improving the CO removal rate of sintering flue gas. This process diverts the flue gas from each sintering machine's windboxes according to CO concentration, achieving the goals of improving treatment efficiency, reducing CO emissions, and extending catalyst life. This diversion method halves the flue gas volume during the CO removal process, improving treatment efficiency and achieving CO emission reductions. It also reduces the concentrations of SO2, HCl, and VOCs in high-CO flue gas before decarbonization, reducing the adverse effects on CO catalyst activity and thereby extending catalyst life.

[0004] Separately, a Chinese invention patent application, publication number CN118416690A, has been filed for a system and method for removing CO from sintering flue gas. This invention successfully addresses the issue of CO removal from sintering flue gas by leveraging the characteristics of sintering flue gas in terms of temperature, CO concentration, and desulfurization and denitrification processes. Specifically, the system regulates the flue gas temperature after CO catalytic oxidation, ensuring a stable temperature before entering the SCR reactor. It also effectively utilizes the heat generated by the CO catalytic oxidation reaction, achieving the dual goals of CO removal and waste heat utilization, thereby reducing energy consumption and energy waste during the sintering process.

[0005] Although the above two schemes have proposed some solutions for the sintering flue gas CO removal control technology, they still have certain limitations. For example: on the one hand, taking the above reference scheme 1 as an example, although the existing technical scheme proposes to divert the flue gas at the wind box inlet, it does not consider the impact of the inconsistency of flow velocities in different areas on subsequent links. This analysis method will lead to uneven subsequent treatment effects, increased risk of equipment loss, and reduced energy utilization efficiency. It will also interfere with the stability and operability of the system, making it difficult to completely remove pollutants and increasing maintenance costs and energy consumption.

[0006] On the other hand, taking the above-mentioned reference scheme 2 as an example, the existing technical scheme proposes the influence of temperature and CO concentration in the reaction, but ignores the intrinsic connection between temperature and CO concentration and the supplementary combustion operation, and thus cannot dynamically control the relevant parameters of the supplementary combustion operation. This analysis method makes it difficult for the supplementary combustion operation to adapt to the actual reaction requirements, affects the CO removal effect, increases energy consumption, and reduces the operating efficiency and stability of the entire CO removal system. Summary of the Invention

[0007] In view of this, in order to solve the problems raised in the above background technology, a control system and method for deCOing of sintering flue gas are proposed.

[0008] The objectives of the present invention can be achieved through the following technical solutions: In the first aspect, the present invention provides a control system for deCOing of sintering flue gas, including: a diversion optimization module, an array of adjustable angle guide plates is configured at the flue inlet, and the angle of the guide plates is dynamically adjusted based on the flue gas flow distribution data.

[0009] The low-temperature oxidation module is provided with a low-temperature catalyst layer to perform low-temperature oxidation on the flue gas entering the flue through the adjustable angle guide plate array.

[0010] The supplementary combustion control module uses a gas supplementary combustion array to perform supplementary combustion operations on the flue gas that has undergone low-temperature oxidation, collects temperature data and CO concentration data in real time, and dynamically adjusts the gas supply based on the data.

[0011] The high-temperature oxidation module is equipped with a high-temperature catalyst layer to perform high-temperature oxidation on the flue gas that has undergone the supplementary combustion operation, and then output it to the flue.

[0012] A second aspect of the present invention provides a method for controlling deCO removal from sintering flue gas, comprising: S1, configuring an array of angle-adjustable guide plates at a flue inlet, and dynamically adjusting the angle of the guide plates based on flue gas flow distribution data.

[0013] S2. Setting a low-temperature catalyst layer to perform low-temperature oxidation on the flue gas entering the flue through the adjustable angle guide plate array.

[0014] S3. Perform a supplementary combustion operation on the flue gas that has undergone low-temperature oxidation using a gas supplementary combustion array, collect temperature data and CO concentration data in real time, and dynamically adjust the gas supply based on the data.

[0015] S4. A high-temperature catalyst layer is provided to perform high-temperature oxidation on the flue gas that has undergone the supplementary combustion operation, and then output the flue gas.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention configures an array of adjustable-angle guide plates at the flue inlet and dynamically adjusts the angle of the guide plates based on the flue gas flow distribution data, so that the flue gas entering the subsequent modules is more uniform, the CO removal effect is improved, the stable operation of the system is ensured, the equipment loss is reduced, the impact of uneven flue gas on the equipment is reduced, the equipment life is extended, and energy waste is reduced.

[0017] (2) The present invention dynamically adjusts the gas supply based on the collected temperature data and CO concentration data. This analysis method can accurately match the reaction requirements, ensure the full oxidation of CO, improve the removal efficiency, and at the same time achieve energy conservation and consumption reduction, avoid gas waste or insufficient supply, reduce production costs, maintain stable system operation, ensure that the reaction temperature is in the appropriate range, extend the service life of the catalyst, and reduce equipment maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the connection of various modules of the system of the present invention.

[0020] Figure 2 Schematic diagram of the steps of the method of the present invention.

[0021] Figure 3 A schematic diagram of the mechanical structure configuration corresponding to an embodiment provided by the present invention.

[0022] Figure numerals: 1—adjustable angle guide plate array, 2—guide optimization area, 3—low temperature oxidation, 4—supplementary combustion control area, 5—high temperature oxidation area. DETAILED DESCRIPTION

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

[0024] See also Figure 1As shown, the first aspect of the present invention provides a control system for sintering flue gas deCO, including a diversion optimization module, a low-temperature oxidation module, a supplementary combustion control module and a high-temperature oxidation module, wherein the diversion optimization module is connected to the low-temperature oxidation module, the low-temperature oxidation module is connected to the supplementary combustion control module, and the supplementary combustion control module is connected to the high-temperature oxidation module.

[0025] The diversion optimization module configures an array of adjustable angle guide plates at the flue inlet and dynamically adjusts the angle of the guide plates based on the flue gas flow distribution data.

[0026] For explanation, see Figure 3 As shown, an array of adjustable deflectors is installed at the flue entrance. These deflectors act like adjustable valves, varying their angles. Each deflector can operate independently or collaboratively, and their angles can control the direction and flow of the flue gas. This physical structure provides the hardware foundation for subsequent optimization of flue gas flow distribution.

[0027] See also Figure 3 As shown, in a mechanical structure corresponding to an embodiment provided, the flow optimization area is used to perform flow optimization analysis, the low-temperature oxidation area is used to set a low-temperature catalyst layer, the supplementary combustion control area is used to set a gas supplementary combustion array, and the high-temperature oxidation area is used to set a high-temperature catalyst layer.

[0028] It should be noted that the effects of flow optimization are: 1. Improving the system's CO removal efficiency: If the flue gas flow is unevenly distributed when entering the subsequent treatment module, the flue gas in some areas will not fully contact the catalyst. Flow optimization allows the flue gas to pass evenly through the catalyst layer, allowing the CO to react more fully with the catalyst. In both the low-temperature and high-temperature oxidation modules, uniform flue gas distribution ensures sufficient contact between CO and both low-temperature and high-temperature catalysts, allowing the oxidation reaction to proceed more efficiently and improving the CO removal effect.

[0029] 2. Reduce catalyst consumption costs: When flue gas flow is unevenly distributed, catalysts in certain areas will be subjected to excessive flue gas loads, causing increased wear and loss of activity, necessitating more frequent replacement. By optimizing flow diversion, the catalyst can be relatively evenly exposed to flue gas flow throughout its use, avoiding excessive localized catalyst consumption and extending its overall service life, thereby reducing the frequency and cost of catalyst replacement.

[0030] 3. Ensure stable equipment operation: Uneven flue gas flow can subject the catalyst layer to varying pressures and airflow impacts. Over time, this can damage the catalyst layer structure and affect the normal operation of the equipment. Flow optimization can reduce this damage to the equipment caused by uneven flue gas flow, ensure the stability of the catalyst layers in both the low-temperature and high-temperature oxidation modules, reduce the risk of equipment maintenance and failure, and ensure long-term stable operation of the entire CO removal system.

[0031] In a preferred embodiment of the present invention, the specific implementation method of the diversion optimization module is as follows: a flow velocity sensor is deployed corresponding to each diversion port of the adjustable angle guide plate array at the flue inlet to form a flow velocity sensor array, each diversion port of the adjustable angle guide plate array is numbered, and the flow velocity sensor array is used to collect the flue gas flow rate of each diversion port in real time.

[0032] Flow sensors with flow rate values exceeding a preset range are screened out through threshold comparison, and the numbers of the corresponding diversion ports are determined through coordinate mapping to generate a sequence of diversion ports to be adjusted.

[0033] The absolute deviation value of the flow velocity corresponding to each diversion port to be adjusted exceeding the preset range is calculated, and the diversion ports to be adjusted are prioritized in descending order according to the absolute deviation value to obtain a priority order.

[0034] The servo motor is driven based on the fuzzy PID control algorithm to adjust the deflection angle of the guide vane in order of priority.

[0035] In a preferred embodiment of the present invention, the specific method of generating the sequence of diversion outlets to be adjusted is as follows: based on a preset equal interval time length, the flue gas flow rate of each diversion outlet in a number of consecutive time windows is obtained, the flue gas flow rate of each diversion outlet in each time window is averaged and calculated to obtain the average flue gas flow rate, and then the deviation degree of the flue gas flow rate of each diversion outlet and the average flue gas flow rate is analyzed and calculated to obtain the flue gas flow rate deviation degree of each diversion outlet in each time window.

[0036] It should be added that the specific method of performing the deviation analysis is as follows: the difference between the flue gas flow rate and the average flue gas flow rate is calculated, and then the absolute value is taken, and then the ratio with the average flue gas flow rate is calculated to obtain the flue gas flow rate deviation.

[0037] The flue gas flow rate deviation of each diversion outlet is compared with the preset flue gas flow rate deviation threshold. At the same time, the flue gas flow rate of each diversion outlet is compared with the preset flue gas flow rate threshold. The diversion outlets with a flue gas flow rate deviation greater than the flue gas flow rate deviation threshold or a flue gas flow rate greater than the flue gas flow rate threshold are screened out to construct the abnormal diversion outlet sequence in each time window.

[0038] It should be noted that the setting of the flue gas flow rate deviation threshold requires comprehensive consideration of many factors. From the perspective of flue gas design specifications, flues of different sizes, materials and uses have different ideal flue gas flow rate distributions, which affects the threshold setting. The processing capacity of the system is also critical. If the system has a strong adaptability to flue gas flow fluctuations, the threshold can be appropriately relaxed; otherwise, it needs to be strictly set. In addition, the requirements of subsequent processing modules for flue gas flow stability cannot be ignored. Modules with strict requirements on the catalyst reaction environment require more precise flue gas flow rate control, and the threshold will be correspondingly stricter.

[0039] The abnormal diversion outlet sequences of each time window are compared, and the diversion outlets that are abnormal in multiple preset consecutive time windows are recorded as diversion outlets to be adjusted, and then the diversion outlet sequence to be adjusted is further constructed.

[0040] Exemplarily, the multiple consecutive time windows may be 5 consecutive time windows.

[0041] In a preferred embodiment of the present invention, the specific analysis method of the priority order is as follows: extract the flue gas flow rate deviation of each diversion outlet in multiple consecutive time windows, and then assign different weights to each time window according to the preset weight assignment rules, and perform weight fusion calculation on the flue gas flow rate deviation of each outlet in each time window and the corresponding weight to obtain the priority coefficient of each time window, and then arrange the priority coefficients in order from large to small to construct a priority order.

[0042] One weight assignment rule is: the closer the time window is to the current moment, the higher the reference value of its data for the current deflector angle adjustment decision, and the greater the weight assigned; the farther away from the current moment, the lower the reference value, and the smaller the weight. Specifically: suppose there are a total of 5 consecutive time windows, which are recorded as 、 、 、 、 , is the time window closest to the current moment, is the time window farthest from the current moment. According to the above idea, the weights can be set as follows: Weight , Weight , Weight , Weight , Weight The sum of all time window weights is 1.

[0043] In a preferred embodiment of the present invention, the specific analysis method for adjusting the guide vane deflection angle is as follows: based on historical guide vane adjustment records, the corresponding relationship between each guide vane adjustment angle and the flue gas flow velocity deviation is obtained.

[0044] The same guide vane adjustment angles are classified to obtain the flue gas flow velocity deviations corresponding to each guide vane adjustment angle, and then the flue gas flow velocity deviations are averaged to obtain the flue gas flow velocity deviations corresponding to each guide vane adjustment angle, and a correlation model between the guide vane adjustment angle and the flue gas flow velocity deviation is constructed.

[0045] The flue gas velocity deviation of each guide port to be adjusted is input into the guide vane adjustment angle and flue gas velocity deviation correlation model to obtain the guide vane adjustment angle corresponding to each guide port to be adjusted, and then the guide vane deflection angle is adjusted based on the guide vane adjustment angle.

[0046] It should be noted that the effects of constructing a model correlating the guide vane adjustment angle with the flue gas velocity deviation are as follows: 1. Achieving precise control: In actual operation, once the flue gas velocity deviation of each guide outlet to be adjusted is known, the corresponding guide vane adjustment angle can be quickly derived based on the correlation model. For example, when a large flue gas velocity deviation is detected at a particular guide outlet, the model can accurately determine the required guide vane adjustment angle. Compared to adjustments based on experience or simple judgment without a model, this can more efficiently and accurately optimize the guide vane angle, thereby optimizing the flue gas flow distribution within the flue and improving the treatment efficiency of the sintering flue gas CO removal system.

[0047] 2. Improved system stability: Leveraging a correlation model, the system dynamically adjusts the guide vane angle based on real-time flue gas velocity deviation. When flue gas velocity fluctuates within the flue, the system promptly adjusts based on the model to maintain a stable flow rate. This ensures that subsequent treatment modules (such as the low-temperature oxidation module and the high-temperature oxidation module) operate under stable flue gas flow conditions, minimizing the adverse effects of flue gas flow instability on equipment and treatment performance, and improving the stability of the entire CO removal system.

[0048] In a preferred embodiment of the present invention, the adjustment of the guide vane deflection angle further includes: after completing a single adjustment, starting a secondary flow velocity scan to verify the adjustment effect; if the flow velocity in the target area still exceeds the limit, triggering an iterative adjustment process.

[0049] When the number of continuous adjustments exceeds the set threshold and the flow rate deviation does not converge to the allowable range, a device fault code is generated and an early warning signal is pushed to the operation and maintenance terminal through the industrial Internet of Things platform.

[0050] Each adjustment parameter and result is stored in the historical database, and the PID control parameter set is continuously optimized through machine learning algorithms to improve the subsequent control accuracy.

[0051] It should be noted that the present invention configures an adjustable angle guide plate array at the flue inlet and dynamically adjusts the guide plate angle based on the flue gas flow distribution data, so that the flue gas entering the subsequent module is more uniform, the CO removal effect is improved, the stable operation of the system is ensured, the equipment loss is reduced, the impact of uneven flue gas on the equipment is reduced, the equipment life is extended, and energy waste is reduced.

[0052] The low-temperature oxidation module is provided with a low-temperature catalyst layer to perform low-temperature oxidation on the flue gas entering the flue through the array of adjustable-angle guide plates.

[0053] It's important to explain that the low-temperature catalyst layer within the low-temperature oxidation module is the core of low-temperature oxidation. Catalysts lower the activation energy of chemical reactions, enabling efficient oxidation reactions at relatively low temperatures. Within this module, the low-temperature catalyst catalyzes the oxidation of carbon monoxide (CO) in the flue gas with oxygen to produce CO2. Compared to traditional high-temperature oxidation methods, low-temperature oxidation not only reduces energy consumption but also avoids equipment wear and other complex side reactions associated with high temperatures.

[0054] It's important to note that low-temperature oxidation treatment initially removes CO from flue gas, reducing its content and alleviating the burden on subsequent treatment modules. This step lays the foundation for the entire CO removal process, enabling subsequent post-combustion control and high-temperature oxidation steps to proceed more smoothly. This helps improve overall CO removal efficiency and ensures that the flue gas ultimately exiting the flue meets environmental emission standards.

[0055] For example, common low-temperature catalyst materials include transition metal composite oxides (such as copper oxide-cerium oxide composite oxides) and supported precious metal catalysts (such as platinum, palladium, and other precious metals supported on alumina). These materials are prepared through specific processes to create catalyst layers with high specific surface areas and suitable pore structures, thereby improving catalytic efficiency.

[0056] The supplementary combustion control module uses a gas supplementary combustion array to perform supplementary combustion operations on the flue gas that has undergone low-temperature oxidation, collects temperature data and CO concentration data in real time, and dynamically adjusts the gas supply based on the data.

[0057] It should be noted that the main reasons for dynamically adjusting the gas supply are as follows: 1. Ensuring sufficient reaction: After low-temperature oxidation, the temperature and CO concentration of the sintering flue gas will change. The initial state of the flue gas varies under different operating conditions. Relying solely on a fixed gas supply cannot guarantee sufficient CO oxidation during subsequent supplementary combustion operations. Dynamically adjusting the gas supply can match the gas supply to the actual flue gas conditions based on real-time temperature and CO concentration data. This provides the appropriate heat and reaction conditions for the CO oxidation reaction, ensuring more complete conversion of CO to CO2 and improving CO removal efficiency.

[0058] 2. Adapting to Changing System Operating Conditions: During actual production, sintering flue gas parameters such as flow rate and composition fluctuate continuously. For example, changes in the sintering machine's production load can alter the flue gas volume and CO concentration. Dynamically adjusting the gas supply allows the system to quickly adapt to these operating conditions, maintaining stable operation and ensuring the overall CO removal system's effectiveness, preventing unregulated flue gas emissions from being discharged after treatment due to improper gas supply.

[0059] 3. Optimizing Energy Efficiency: A fixed gas supply can lead to either gas waste or insufficient supply. Excessive gas supply not only wastes energy but can also cause safety issues. Insufficient gas supply can't meet reaction requirements, impacting CO removal effectiveness. Dynamically adjusting gas supply allows for precise control of gas consumption based on actual reaction needs, ensuring CO removal effectiveness while maximizing energy efficiency and reducing production costs.

[0060] In a preferred embodiment of the present invention, the specific analysis method for dynamically adjusting the gas supply amount is as follows: obtain the position of each gas nozzle corresponding to the gas supplementary combustion array, record the center point of the flue cross-sectional area corresponding to each column of gas nozzles as the flue environment data monitoring point of the column of gas nozzles, and use a temperature acquisition device and a CO concentration acquisition device to collect the temperature and CO concentration of each flue environment data monitoring point.

[0061] It should be noted that temperature has a significant impact on the CO oxidation reaction rate. If the actual reaction temperature is lower than the appropriate reaction temperature, the CO oxidation reaction rate will slow down, resulting in some CO not being oxidized in time, reducing the CO removal efficiency; if the temperature is too high, it will not only increase energy consumption, but may also cause the catalyst to deactivate due to overheating, affecting the long-term stable operation of the system. In the supplementary combustion control module, by monitoring the temperature of each flue environment data monitoring point and comparing it with the appropriate reaction temperature, the gas supply is dynamically adjusted according to the deviation to ensure that the reaction temperature is maintained within the appropriate range and the reaction is carried out efficiently.

[0062] It should be noted that if the actual CO concentration is higher than the appropriate reaction CO concentration, it means that more CO needs to be removed through supplementary combustion and oxidation reaction. At this time, if the gas supply is insufficient, the heat generated by the supplementary combustion is insufficient, and the CO cannot fully react, which will cause the CO content in the final exhaust gas to exceed the standard and fail to meet the environmental emission standards. If the actual CO concentration is lower than the appropriate reaction CO concentration, excessive supplementary combustion will cause energy waste and may also affect the catalyst performance and stability of the system equipment due to excessively high temperature. Therefore, real-time monitoring of the CO concentration and comparison with the appropriate reaction CO concentration, and dynamic adjustment of the gas supply according to the deviation can ensure that CO is fully converted into CO2 under appropriate reaction conditions, which not only guarantees the CO removal effect but also realizes the rational use of energy.

[0063] The temperature and CO concentration are respectively subjected to deviation analysis with the suitable reaction temperature and suitable reaction CO concentration preset at each flue environment data monitoring point to obtain the temperature deviation degree and CO concentration deviation degree of each flue environment data monitoring point.

[0064] It's important to clarify that the optimal reaction temperature refers to the temperature range that enables the CO oxidation reaction to proceed at the optimal rate while ensuring stable system operation during the post-combustion operation and subsequent oxidation reaction. Within this temperature range, the chemical reactivity of CO and oxygen is high, and the catalyst's activity is fully utilized, resulting in efficient CO removal.

[0065] It's important to clarify that the optimal CO concentration for reaction refers to the range of CO concentrations that allows for efficient CO oxidation during post-combustion and subsequent oxidation reactions, while also balancing energy efficiency and system stability. This concentration is not a fixed value and varies depending on factors such as system process parameters, catalyst characteristics, and the content of other flue gas components.

[0066] Then, a weight fusion analysis is performed to obtain the temperature regulation demand coefficient corresponding to each flue environment data monitoring point, and the temperature regulation demand coefficient is compared with the preset temperature regulation demand coefficient threshold. The list of environmental data monitoring points to be adjusted is screened, and then the gas flow rate of the corresponding gas nozzle is adjusted, and the flue environment information is monitored in real time until the temperature regulation demand coefficient is within the allowable threshold.

[0067] In a preferred embodiment of the present invention, the specific analysis method of the list of environmental data monitoring points to be adjusted is as follows: the temperature adjustment demand coefficient corresponding to each flue environmental data monitoring point is compared with the preset temperature adjustment demand coefficient threshold. If the temperature adjustment demand coefficient corresponding to a flue environmental data monitoring point is greater than the temperature adjustment demand coefficient threshold, the flue environmental data monitoring point is identified as the environmental data monitoring point to be adjusted, and the list of environmental data monitoring points to be adjusted is obtained by statistics.

[0068] In a preferred embodiment of the present invention, the adjustment of the gas flow rate corresponding to the gas nozzle needs to be dynamically monitored based on a preset gas nozzle adjustment time window. When a flue environment data monitoring point is detected as an environment data monitoring point to be adjusted, the gas supply adjustment is immediately executed; when a flue environment data monitoring point is detected as not an environment data monitoring point to be adjusted, the gas supply adjustment is immediately stopped.

[0069] The high-temperature oxidation module is provided with a high-temperature catalyst layer to perform high-temperature oxidation on the flue gas that has undergone the supplementary combustion operation, and then output it to the flue.

[0070] It's important to note that the core of the high-temperature oxidation module is the high-temperature catalyst layer. This catalyst further promotes the chemical reaction between CO and oxygen in the high-temperature environment. Under the dual effects of high temperature and the catalyst, the remaining CO in the flue gas is more fully oxidized with oxygen, converting it into CO2. The synergistic effect of the high temperature and the efficient catalyst significantly increases the rate and extent of the oxidation reaction, enabling more thorough CO removal.

[0071] It should be noted that after high-temperature oxidation treatment, the CO content in the flue gas is significantly reduced, meeting environmental emission standards. The purified flue gas can be safely discharged into the atmosphere through the flue, reducing environmental pollution. The high-temperature oxidation module ensures the stable and efficient operation of the entire sintering flue gas deCO system, guaranteeing the ultimate treatment effect and playing a key role in achieving environmental protection goals.

[0072] For example, common high-temperature catalyst materials include precious metals (such as platinum, palladium, etc.) and transition metal oxides (such as manganese oxide, iron oxide, etc.). These materials are made into catalyst layers through specific preparation processes to meet actual application requirements.

[0073] It should be noted that the present invention dynamically adjusts the gas supply based on the collected temperature data and CO concentration data. This analysis method can accurately match the reaction requirements, ensure the full oxidation of CO, and improve the removal efficiency. At the same time, it can achieve energy conservation and consumption reduction, avoid gas waste or insufficient supply, reduce production costs, maintain stable operation of the system, ensure that the reaction temperature is in an appropriate range, extend the service life of the catalyst, and reduce equipment maintenance costs.

[0074] See also Figure 2 As shown, the second aspect of the present invention provides a control method for deCO of sintering flue gas, including: S1, configuring an adjustable angle guide plate array at the flue inlet, and dynamically adjusting the guide plate angle based on flue gas flow distribution data.

[0075] S2. Setting a low-temperature catalyst layer to perform low-temperature oxidation on the flue gas entering the flue through the adjustable angle guide plate array.

[0076] S3. Perform a supplementary combustion operation on the flue gas that has undergone low-temperature oxidation using a gas supplementary combustion array, collect temperature data and CO concentration data in real time, and dynamically adjust the gas supply based on the data.

[0077] S4. A high-temperature catalyst layer is provided to perform high-temperature oxidation on the flue gas that has undergone the supplementary combustion operation, and then output the flue gas.

[0078] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they should all fall within the scope of protection of the present invention.

Claims

1. A sintering flue gas deCO control system, characterized in that: include: The diversion optimization module configures an array of adjustable angle guide plates at the flue inlet and dynamically adjusts the angle of the guide plates based on the flue gas flow distribution data; A low-temperature oxidation module is provided with a low-temperature catalyst layer to perform low-temperature oxidation on the flue gas entering the flue through the array of adjustable angle guide plates; The supplementary combustion control module uses a gas supplementary combustion array to perform supplementary combustion on the flue gas that has undergone low-temperature oxidation, collects temperature data and CO concentration data in real time, and dynamically adjusts the gas supply based on the data; The high-temperature oxidation module is equipped with a high-temperature catalyst layer to oxidize the flue gas after the supplementary combustion operation and then output it to the flue; The specific implementation of the diversion optimization module includes: At the flue inlet, a flow velocity sensor is deployed corresponding to each guide port of the adjustable angle guide plate array to form a flow velocity sensor array, each guide port of the adjustable angle guide plate array is numbered, and the flow velocity of each guide port is collected in real time using the flow velocity sensor array; Filter out flow sensors whose flow rate values exceed the preset range through threshold comparison, determine the numbers of the corresponding diversion ports through coordinate mapping, and generate a sequence of diversion ports to be adjusted; Calculate the absolute deviation value of the flow velocity corresponding to each diversion port to be adjusted that exceeds the preset range, and sort the diversion ports to be adjusted in descending order of absolute deviation value to obtain a priority order; The servo motor is driven based on the fuzzy PID control algorithm to adjust the deflection angle of the guide vane in order of priority; The specific method of generating the sequence of diversion ports to be adjusted is as follows: The flue gas flow rate of each diversion outlet in a number of consecutive time windows is obtained based on a preset equal interval time, and the flue gas flow rate of each diversion outlet in each time window is averaged to obtain the average flue gas flow rate, and then the deviation degree of the flue gas flow rate of each diversion outlet and the average flue gas flow rate is analyzed and calculated to obtain the flue gas flow rate deviation degree of each diversion outlet in each time window; Compare the flue gas flow rate deviation of each diversion port with a preset flue gas flow rate deviation threshold, and also compare the flue gas flow rate of each diversion port with a preset flue gas flow rate threshold. Filter out diversion ports with a flue gas flow rate deviation greater than the flue gas flow rate deviation threshold or a flue gas flow rate greater than the flue gas flow rate threshold, and construct a sequence of abnormal diversion ports in each time window. Compare the abnormal diversion outlet sequences in each time window, record the diversion outlets that are abnormal in multiple preset consecutive time windows as diversion outlets to be adjusted, and further construct the diversion outlet sequence to be adjusted; The specific analysis method of the priority order is as follows: The smoke flow rate deviation of each diversion outlet in multiple consecutive time windows is extracted, and then different weights are assigned to each time window according to the preset weight assignment rules. The smoke flow rate deviation of each outlet in each time window is weighted and fused with the corresponding weight to obtain the priority coefficient of each time window, and then the priority coefficients are arranged in order from large to small to construct a priority order.

2. A sintering flue gas deCO control system according to claim 1, characterized in that: The specific analysis method for adjusting the deflection angle of the guide vane is as follows: Based on the historical guide vane adjustment records, the corresponding relationship between the adjustment angle of each guide vane and the flue gas velocity deviation is obtained; The same guide vane adjustment angle is classified to obtain the flue gas flow velocity deviation corresponding to each guide vane adjustment angle, and then the flue gas flow velocity deviation is calculated by averaging the flue gas flow velocity deviations to obtain the flue gas flow velocity deviation corresponding to each guide vane adjustment angle, and a correlation model between the guide vane adjustment angle and the flue gas flow velocity deviation is constructed; The flue gas velocity deviation of each guide port to be adjusted is input into the guide vane adjustment angle and flue gas velocity deviation correlation model to obtain the guide vane adjustment angle corresponding to each guide port to be adjusted, and then the guide vane deflection angle is adjusted based on the guide vane adjustment angle.

3. The sintering flue gas deCO control system according to claim 1, characterized in that: The adjustment of the deflection angle of the guide plate also includes: After completing a single adjustment, a secondary flow rate scan is initiated to verify the adjustment effect. If the flow rate in the target area still exceeds the limit, the iterative adjustment process is triggered; When the number of consecutive adjustments exceeds the set threshold and the flow rate deviation does not converge to the allowable range, a device fault code is generated and an early warning signal is pushed to the operation and maintenance terminal through the industrial Internet of Things platform; Each adjustment parameter and result is stored in the historical database, and the PID control parameter set is continuously optimized through machine learning algorithms to improve the subsequent control accuracy.

4. The sintering flue gas deCO control system according to claim 1, characterized in that: The specific analysis method of dynamically adjusting the gas supply is as follows: Obtain the position of each gas nozzle in the gas supplementary combustion array, record the center point of the flue cross-section area corresponding to each column of gas nozzles as the flue environment data monitoring point of the gas nozzle column, and use the temperature acquisition device and CO concentration acquisition device to collect the temperature and CO concentration of each flue environment data monitoring point; The temperature and CO concentration are respectively subjected to deviation analysis with the suitable reaction temperature and suitable reaction CO concentration pre-set at each flue environment data monitoring point to obtain the temperature deviation and CO concentration deviation of each flue environment data monitoring point; Then, a weight fusion analysis is performed to obtain the temperature regulation demand coefficient corresponding to each flue environment data monitoring point, and the temperature regulation demand coefficient is compared with the preset temperature regulation demand coefficient threshold. The list of environmental data monitoring points to be adjusted is screened, and then the gas flow rate of the corresponding gas nozzle is adjusted, and the flue environment information is monitored in real time until the temperature regulation demand coefficient is within the allowable threshold.

5. The sintering flue gas deCO control system according to claim 4, characterized in that: The specific analysis method of the list of environmental data monitoring points to be adjusted is as follows: The temperature adjustment demand coefficient corresponding to each flue environment data monitoring point is compared with the preset temperature adjustment demand coefficient threshold. If the temperature adjustment demand coefficient corresponding to a flue environment data monitoring point is greater than the temperature adjustment demand coefficient threshold, the flue environment data monitoring point is identified as the environment data monitoring point to be adjusted, and a list of environment data monitoring points to be adjusted is obtained by statistics.

6. A sintering flue gas deCO control system according to claim 5, characterized in that: The adjustment of the gas flow rate corresponding to the gas nozzle needs to be dynamically monitored based on the preset gas nozzle adjustment time window. When a flue environment data monitoring point is detected as the environment data monitoring point to be adjusted, the gas supply adjustment is immediately executed. When a flue environment data monitoring point is detected as not the environment data monitoring point to be adjusted, the gas supply adjustment is immediately stopped.

7. A method for controlling deCO2 removal from sintering flue gas, applied to the control system for deCO2 removal from sintering flue gas according to any one of claims 1 to 6, characterized in that: include: S1. An array of adjustable angle guide plates is installed at the flue inlet, and the angle of the guide plates is dynamically adjusted based on the flue gas flow distribution data; S2. Setting a low-temperature catalyst layer to perform low-temperature oxidation on the flue gas entering the flue through the adjustable angle guide plate array; S3. Performing a supplementary combustion operation on the flue gas that has undergone low-temperature oxidation using a gas supplementary combustion array, collecting temperature data and CO concentration data in real time, and dynamically adjusting the gas supply based on the data; S4. A high-temperature catalyst layer is provided to perform high-temperature oxidation on the flue gas that has undergone the supplementary combustion operation, and then output the flue gas.

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