Control system and method for removing CO from sintering flue gas

Abstract

The invention belongs to the technical field of sintering flue gas CO removal control, and discloses a control system and method for sintering flue gas CO removal. The angle-adjustable flow guide plate array is arranged at the flue inlet, and the angles of the flow guide plates are dynamically adjusted based on flue gas flow distribution data, so that flue gas entering a subsequent module is more uniform, the CO removal effect is improved, stable operation of the system is guaranteed, equipment loss is reduced, impact on equipment due to non-uniform flue gas is reduced, the service life of the equipment is prolonged, and energy waste is reduced. According to the method, the gas supply amount is dynamically adjusted based on the collected temperature data and CO concentration data, the analysis mode can accurately match the reaction requirement, sufficient oxidation of CO is ensured, the removal efficiency is improved, meanwhile, energy conservation and consumption reduction can be achieved, gas waste or insufficient supply is avoided, the production cost is reduced, and stable operation of the system is maintained; the reaction temperature is in a proper range, the service life of the catalyst is prolonged, and the equipment maintenance cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of sintering flue gas CO removal control, and relates to a control system and method for sintering flue gas CO removal. Background Art

[0002] Sintering flue gas CO removal is an important environmental protection treatment technology in the sintering process of the iron and steel industry, aiming to reduce the content of carbon monoxide (CO) in sintering flue gas and reduce its environmental pollution. The sintering working conditions are complex. Without control, it is difficult to achieve the best reaction conditions in each link, resulting in fluctuations in CO removal efficiency. Through precise control, resources can be rationally allocated, the utilization rate of catalysts can be improved, energy consumption can be reduced, and at the same time, the risk of equipment damage caused by abnormal reactions can be avoided, ensuring the safe and stable operation of the system. Therefore, the research on the control of sintering flue gas CO removal is of great significance.

[0003] In the prior art, there are also technical solutions for sintering flue gas CO removal control technology. For example, a Chinese invention patent application for a method for improving the CO removal rate of sintering flue gas with the publication number CN118904071A. This process shunts the flue gas of each wind box of the sintering machine according to the CO concentration, achieving the purposes of improving the treatment efficiency, reducing CO emissions, and extending the service life of the catalyst. This shunting treatment method halves the flue gas volume during the CO removal process, improves the treatment efficiency, and realizes CO emission reduction. At the same time, it can reduce the concentrations of SO2, HCl, and VOCs in the high-CO flue gas before decarbonization, reduce the adverse effects on the activity of the CO catalyst, and thus extend the service life of the catalyst.

[0004] In addition, a Chinese invention patent application for a sintering flue gas CO removal system and method with the publication number CN118416690A. This invention successfully solves the problem of flue gas CO removal based on the characteristics of sintering flue gas in terms of temperature, CO concentration, and desulfurization and denitrification processes. Specifically, it can adjust the temperature of the flue gas after CO catalytic oxidation to ensure a stable temperature entering the SCR reactor, and also make full use of the heat generated by the CO catalytic oxidation reaction to create benefits, achieving the dual goals of CO removal and waste heat utilization, thereby reducing the energy consumption of the sintering process and reducing energy waste.

[0005] Although the above two solutions propose some solutions for sintering flue gas CO removal control technology, there are still certain limitations. For example, on the one hand, taking the above reference solution one as an example, although the prior art solution proposes to shunt the flue gas at the inlet of the wind box, it does not consider the influence of the inconsistent flow velocity in different regions on the subsequent links. This analysis method will lead to uneven subsequent treatment effects, increased risk of equipment loss, reduced energy utilization efficiency, and interference with the system stability and operability, making it difficult to completely remove pollutants, increasing maintenance costs and energy consumption.

[0006] On the other hand, taking the above reference solution two as an example, the prior art solution proposed the influence of temperature and CO concentration in the reaction, but ignored the internal relationship between temperature, CO concentration and afterburning operation, thus unable to dynamically regulate the relevant parameters of the afterburning operation. This analysis method makes it difficult for the afterburning operation to adapt to the actual reaction requirements, affects the CO removal effect, increases energy consumption, and reduces the operation efficiency and stability of the entire CO removal system. Summary of the Invention

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

[0008] The object of the present invention can be achieved by the following technical solutions: In the first aspect of the present invention, a control system for sintering flue gas CO removal is provided, including: a flow guiding optimization module, which configures an adjustable angle flow guiding plate array at the flue gas inlet and dynamically adjusts the angle of the flow guiding plate based on the flue gas flow distribution data.

[0009] A low-temperature oxidation module, which sets a low-temperature catalyst layer to perform low-temperature oxidation on the flue gas entering the flue through the adjustable angle flow guiding plate array.

[0010] An afterburning regulation module, which uses a gas afterburning array to perform afterburning operation on the flue gas after low-temperature oxidation, and real-time collects temperature data and CO concentration data, and dynamically adjusts the gas supply based on the data.

[0011] A high-temperature oxidation module, which sets a high-temperature catalyst layer to perform high-temperature oxidation on the flue gas after afterburning operation, and then outputs it from the flue.

[0012] In the second aspect of the present invention, a control method for sintering flue gas CO removal is provided, including: S1, configuring an adjustable angle flow guiding plate array at the flue gas inlet and dynamically adjusting the angle of the flow guiding plate based on the 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 flow guiding plate array.

[0014] S3, using a gas afterburning array to perform afterburning operation on the flue gas after low-temperature oxidation, and real-time collecting temperature data and CO concentration data, and dynamically adjusting the gas supply based on the data.

[0015] S4, setting a high-temperature catalyst layer to perform high-temperature oxidation on the flue gas after afterburning operation, and then outputting it from the flue.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) By configuring an adjustable-angle deflector array at the flue inlet, the present invention dynamically adjusts the deflector angle based on the flue gas flow distribution data, making the flue gas entering the subsequent modules more uniform, improving the CO removal effect, ensuring the stable operation of the system, reducing equipment wear and tear, reducing the impact on equipment caused by uneven flue gas, extending the equipment life, and reducing energy waste.

[0017] (2) By dynamically adjusting 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 the stable operation of the system, ensure that the reaction temperature is within an 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 will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the connection of each module of the system of the present invention.

[0020] Figure 2 It is a schematic diagram of the implementation of the method steps of the present invention.

[0021] Figure 3 It is a schematic diagram of the mechanical structure setting corresponding to an embodiment provided by the present invention.

[0022] Reference numerals: 1 - adjustable-angle deflector array, 2 - flow-optimized area, 3 - low-temperature oxidation, 4 - supplementary combustion control area, 5 - high-temperature oxidation area. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0024] Please refer to Figure 1As shown in the figure, the first aspect of the present invention provides a control system for sintering flue gas decarbonization, which includes a flow guiding optimization module, a low-temperature oxidation module, a combustion supplementary regulation module, and a high-temperature oxidation module. Among them, the flow guiding optimization module is connected to the low-temperature oxidation module, the low-temperature oxidation module is connected to the combustion supplementary regulation module, and the combustion supplementary regulation module is connected to the high-temperature oxidation module.

[0025] The flow guiding optimization module is configured with an adjustable-angle deflector array at the flue inlet and dynamically adjusts the deflector angle based on the flue gas flow distribution data.

[0026] It should be explained that, please refer to Figure 3 As shown in the figure, an adjustable-angle deflector array is installed at the flue inlet. These deflectors are like adjustable valves that can change their own angles. Each deflector can work independently or cooperatively, and the change in its angle can control the flow direction and flow rate of the passing flue gas. Through this physical structure setting, it provides a hardware basis for subsequent optimization of the flue gas flow distribution.

[0027] Please refer to Figure 3 As shown in the figure, in the mechanical structure corresponding to an embodiment provided, the flow guiding optimization area is used for flow guiding optimization analysis, the low-temperature oxidation area is used for setting a low-temperature catalyst layer, the combustion supplementary regulation area is used for setting a gas combustion supplementary array, and the high-temperature oxidation area is used for setting a high-temperature catalyst layer.

[0028] It should be noted that the role of flow guiding optimization is as follows: 1. Improve the CO decarbonization efficiency of the system: If the flue gas flow distribution is uneven when entering the subsequent treatment module, it will cause the flue gas in some areas to not fully contact with the catalyst. Flow guiding optimization can make the flue gas pass through the catalyst layer evenly, making the reaction between CO and the catalyst more sufficient. In the low-temperature oxidation module and the high-temperature oxidation module, a uniform flue gas distribution can ensure that CO can fully contact both the low-temperature and high-temperature catalysts, making the oxidation reaction proceed more efficiently and improving the CO decarbonization effect.

[0029] 2. Reduce the catalyst consumption cost: When the flue gas flow distribution is uneven, the catalyst in some areas will bear an excessive flue gas load, resulting in increased wear and accelerated reduction of the activity of this part of the catalyst, and more frequent replacement is required. Through flow guiding optimization, the flue gas flow borne by the catalyst during the entire use process can be relatively balanced, avoiding excessive consumption of local catalysts, extending the overall service life of the catalyst, and thus reducing the replacement frequency and cost of the catalyst.

[0030] 3. Ensure the stable operation of the equipment: Uneven flue gas flow rates can subject the catalyst layer to different pressures and airflow impacts. Over time, this may cause damage to the structure of the catalyst layer, affecting the normal operation of the equipment. Flow guiding optimization can reduce such equipment damage caused by uneven flue gas, ensure the stability of the catalyst layer in the low-temperature oxidation module and the high-temperature oxidation module, reduce the risks of equipment maintenance and failures, and enable the entire CO removal system to operate stably in the long term.

[0031] In a preferred embodiment of the present invention, the specific implementation of the flow guiding optimization module is as follows: At the flue gas inlet, a flow velocity sensor array is deployed corresponding to each flow guiding port of the adjustable-angle flow guiding plate array, and each flow guiding port of the adjustable-angle flow guiding plate array is numbered. The flow velocity sensor array is used to collect the flue gas flow velocities of each flow guiding port in real time.

[0032] Flow velocity sensors with flow velocity values exceeding the preset range are screened through threshold comparison. The numbers of the corresponding flow guiding ports are determined through coordinate mapping to generate a sequence of flow guiding ports to be adjusted.

[0033] Calculate the absolute deviation values of the flow velocities corresponding to each flow guiding port to be adjusted that exceed the preset range. The flow guiding ports to be adjusted are sorted in descending order of the absolute deviation values to obtain a priority order.

[0034] Based on the fuzzy PID control algorithm, drive the servo motor to sequentially adjust the deflection angles of the flow guiding vanes in the priority order.

[0035] In a preferred embodiment of the present invention, the specific method for generating the sequence of flow guiding ports to be adjusted is as follows: Based on a preset equal-interval duration, obtain the flue gas flow velocities of each flow guiding port in a plurality of consecutive time windows. Calculate the average flue gas flow velocity by averaging the flue gas flow velocities of each flow guiding port in each time window. Then, perform deviation degree analysis on the flue gas flow velocities of each flow guiding port and the average flue gas flow velocity to obtain the flue gas flow velocity deviation degrees of each flow guiding port in each time window.

[0036] It should be added that the specific method for performing the deviation degree analysis is: Calculate the absolute value of the difference between the flue gas flow velocity and the average flue gas flow velocity, and then calculate the ratio with the average flue gas flow velocity to obtain the flue gas flow velocity deviation degree.

[0037] Compare the flue gas flow velocity deviation degrees of each flow guiding port with a preset flue gas flow velocity deviation degree threshold, and at the same time compare the flue gas flow velocities of each flow guiding port with a preset flue gas flow velocity threshold. Screen out the flow guiding ports with flue gas flow velocity deviation degrees greater than the flue gas flow velocity deviation degree threshold or flue gas flow velocities greater than the flue gas flow velocity threshold to construct an abnormal flow guiding port sequence for each time window.

[0038] It should be noted that the setting of the flue gas velocity deviation threshold needs to comprehensively consider various factors. From the perspective of the design specifications of the flue, for flues with different sizes, materials, and uses, the ideal flue gas velocity distribution is different, which affects the threshold setting. The processing capacity of the system is also crucial. If the system has a strong adaptability to fluctuations in flue gas flow, the threshold can be appropriately relaxed; otherwise, it needs to be set strictly. In addition, the requirements of the subsequent processing module for the stability of flue gas flow cannot be ignored. For example, for a module with strict requirements for the catalyst reaction environment, more precise control of flue gas velocity is required, and the threshold will be correspondingly stricter.

[0039] Compare the abnormal diversion port sequences of each time window, and mark the diversion ports that are abnormal in a preset continuous multiple time windows as the diversion ports to be adjusted, and then further construct a sequence of diversion ports to be adjusted.

[0040] Exemplarily, the continuous multiple time windows can be 5 continuous 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 velocity deviation degrees of each diversion port in continuous multiple time windows, and then assign different weights to each time window according to a preset weight assignment rule. Perform weighted fusion calculation on the flue gas velocity deviation degrees of each flow port in each time window and the corresponding weights to obtain the priority coefficient of each time window, and then arrange the priority coefficients in descending order to construct the 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 diversion plate angle adjustment decision, and the greater the weight assigned; the farther away from the current moment, the relatively lower the reference value, and the smaller the weight. Specifically: assume that there are a total of 5 consecutive time windows, which are respectively denoted 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: the weight of , the weight of , the weight of , the weight of , the weight of . The sum of the weights of all time windows is 1.

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

[0044] Classify the same guide vane adjustment angles to obtain the corresponding deviation degrees of the flue gas velocity for each guide vane adjustment angle. Then, calculate the average value of the deviation degrees of the flue gas velocity to obtain the deviation degree of the flue gas velocity corresponding to each guide vane adjustment angle, and construct a correlation model between the guide vane adjustment angle and the deviation degree of the flue gas velocity.

[0045] Input the deviation degree of the flue gas velocity of each guide vane to be adjusted into the correlation model between the guide vane adjustment angle and the deviation degree of the flue gas velocity to obtain the guide vane adjustment angle corresponding to each guide vane to be adjusted. Then, adjust the deflection angle of the guide vane based on the guide vane adjustment angle.

[0046] It should be noted that the effects of constructing the correlation model between the guide vane adjustment angle and the deviation degree of the flue gas velocity are as follows: 1. Achieve precise control: In actual operation, after knowing the deviation degree of the flue gas velocity of each guide vane to be adjusted currently, the corresponding guide vane adjustment angle can be quickly obtained according to the correlation model. For example, when it is detected that the deviation degree of the flue gas velocity at a certain guide vane is large, the required guide vane adjustment angle can be accurately determined through the model. Compared with adjusting by experience or simple judgment without the model, the guide vane angle can be optimized more efficiently and accurately, thereby optimizing the flue gas flow distribution in the flue and improving the treatment efficiency of the sintering flue gas de-CO system.

[0047] 2. Improve system stability: With the aid of the correlation model, the system can dynamically adjust the guide vane angle according to the real-time deviation degree of the flue gas velocity. When the flue gas velocity in the flue fluctuates, the system adjusts in a timely manner according to the model to maintain the stability of the flue gas velocity. This can ensure that the subsequent treatment modules (such as the low-temperature oxidation module and the high-temperature oxidation module) work under stable flue gas flow conditions, reduce the adverse effects of unstable flue gas flow on the equipment and treatment effect, and improve the stability of the entire de-CO system.

[0048] In a preferred embodiment of the present invention, the adjustment of the deflection angle of the guide vane further includes: After completing a single adjustment, start the secondary flow velocity scan to verify the adjustment effect. If the velocity in the target area still exceeds the limit, trigger the iterative adjustment process.

[0049] When the continuous adjustment times exceed the set threshold and the velocity deviation does not converge to the allowable range, generate an equipment fault code and push a warning signal to the operation and maintenance terminal through the industrial Internet of Things platform.

[0050] Store each adjustment parameter and result in the historical database, and continuously optimize the PID control parameter set through machine learning algorithms to improve the subsequent regulation accuracy.

[0051] It should be noted that in the present invention, an adjustable-angle deflector array is configured at the flue inlet, and the deflector angles are dynamically adjusted based on the flue gas flow distribution data, making the flue gas entering the subsequent modules more uniform, improving the CO removal effect, ensuring the stable operation of the system, reducing equipment wear, minimizing the impact on equipment caused by uneven flue gas, extending the equipment life, and reducing energy waste.

[0052] In the low-temperature oxidation module, a low-temperature catalyst layer is provided to perform low-temperature oxidation on the flue gas entering the flue through the adjustable-angle deflector array.

[0053] It should be explained that the low-temperature catalyst layer provided in the low-temperature oxidation module is the core for realizing low-temperature oxidation. The catalyst can lower the activation energy of chemical reactions, enabling the oxidation reaction to proceed efficiently at a relatively low temperature. In this module, the low-temperature catalyst promotes the oxidation reaction between carbon monoxide and oxygen in the flue gas to generate carbon dioxide (CO2). Compared with the traditional high-temperature oxidation method, low-temperature oxidation can not only reduce energy consumption but also avoid equipment wear and other complex side reactions caused by high temperature.

[0054] It should be supplemented that through low-temperature oxidation treatment, CO in the flue gas can be initially removed, its content can be reduced, and the burden on the subsequent treatment module can be alleviated. This step lays the foundation for the entire CO removal process, enabling the subsequent supplementary combustion regulation and high-temperature oxidation links to proceed more smoothly, contributing to improving the overall CO removal efficiency and ensuring that the flue gas finally discharged from the flue meets the environmental protection emission standards.

[0055] Exemplarily, common low-temperature catalyst materials include transition metal composite oxides (such as copper oxide-ceria composite oxides), supported noble metal catalysts (such as noble metals like platinum and palladium supported on alumina), etc. These materials are made into a catalyst layer with a high specific surface area and a suitable pore structure through specific preparation processes to improve the catalytic efficiency.

[0056] In the supplementary combustion regulation module, a gas supplementary combustion array is used to perform supplementary combustion on the flue gas after low-temperature oxidation, and temperature data and CO concentration data are collected in real time, and the gas supply amount is dynamically adjusted based on the data.

[0057] It should be noted that the main reasons for dynamically adjusting the gas supply amount are as follows: 1. Ensure full reaction: After the sintering flue gas undergoes low-temperature oxidation, its temperature and CO concentration will change. Under different working conditions, the initial state of the flue gas is different. Relying solely on a fixed gas supply amount is difficult to ensure that CO can be fully oxidized in the subsequent supplementary combustion operation. Dynamically adjusting the gas supply amount can, according to the temperature data and CO concentration data collected in real time, make the gas supply amount match the actual situation of the flue gas, provide appropriate heat and reaction conditions for the CO oxidation reaction, ensure that CO can be more fully converted into CO2, and improve the CO removal efficiency.

[0058] 2. Adapt to changes in system operating conditions: During the actual production process, parameters such as the flow rate and composition of sintering flue gas will fluctuate continuously. For example, when the production load of the sintering machine changes, the amount of flue gas generated and the CO concentration will be different. Dynamically adjusting the gas supply can enable the system to quickly adapt to these changes in operating conditions, maintain a stable operating state, ensure the treatment effect of the entire CO removal system, and avoid the problem that the treated flue gas fails to meet the emission standards due to unreasonable gas supply.

[0059] 3. Optimize energy utilization efficiency: A fixed gas supply may lead to gas waste or insufficient supply. If the gas supply is excessive, it will not only cause energy waste but also may trigger other safety problems; if the supply is insufficient, it cannot meet the reaction requirements and will affect the CO removal effect. Dynamically adjusting the gas supply can accurately control the gas consumption according to the actual reaction requirements, maximize the energy utilization efficiency while ensuring the CO removal effect, and reduce production costs.

[0060] In a preferred embodiment of the present invention, the specific analysis method for dynamically adjusting the gas supply is as follows: Obtain the positions of the gas injection nozzles corresponding to the gas afterburning array, and mark the center point of the flue gas cross-section area corresponding to each column of gas injection nozzles as the flue gas environment data monitoring point of this column of gas injection nozzles. Use a temperature acquisition device and a CO concentration acquisition device to collect the temperature and CO concentration of each flue gas 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 and reducing the CO removal efficiency; if the temperature is too high, it will not only increase energy consumption but also may cause the catalyst to deactivate due to overheating, affecting the long-term stable operation of the system. In the afterburning control module, by monitoring the temperature of each flue gas 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 ensure efficient reaction.

[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 afterburning and oxidation reactions. At this time, if the gas supply is insufficient, the heat generated by afterburning is not enough, and CO cannot react fully, resulting in the CO content in the finally discharged flue gas exceeding the standard and failing to meet the environmental protection emission standards. If the actual CO concentration is lower than the appropriate reaction CO concentration, excessive afterburning will cause energy waste and may also affect the performance of the catalyst and the stability of the system equipment due to too high temperature. Therefore, real-time monitoring of the CO concentration, comparing it with the appropriate reaction CO concentration, and dynamically adjusting the gas supply according to the deviation can ensure that CO is fully converted into CO2 under appropriate reaction conditions, ensuring both the CO removal effect and the reasonable utilization of energy.

[0063] Deviation analysis is performed on the temperature and CO concentration respectively with the appropriate reaction temperature and the appropriate reaction CO concentration preset for 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 should be explained that the appropriate reaction temperature refers to the temperature range that can enable the CO oxidation reaction to proceed at the best rate while ensuring the stable operation of the system during the afterburning operation and subsequent oxidation reaction. Within this temperature range, the chemical reaction activity of CO and oxygen is relatively high, and the activity of the catalyst can also be fully exerted, thus achieving efficient CO removal.

[0065] It should be explained that the appropriate reaction CO concentration refers to the CO concentration range that can enable the CO oxidation reaction to proceed with high efficiency while taking into account the energy utilization efficiency and the stable operation of the system during the afterburning and subsequent oxidation reactions. This concentration is not a fixed value and will vary according to factors such as the process parameters of the system, the characteristics of the catalyst, and the content of other components in the flue gas.

[0066] Furthermore, weight fusion analysis is carried out to obtain the temperature adjustment demand coefficient corresponding to each flue environment data monitoring point. The temperature adjustment demand coefficient is compared with the preset temperature adjustment demand coefficient threshold to screen the list of environmental data monitoring points to be adjusted. 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 adjustment 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 environment data monitoring point is compared with the preset temperature adjustment demand coefficient threshold. If the temperature adjustment demand coefficient corresponding to a certain flue environment data monitoring point is greater than the temperature adjustment demand coefficient threshold, identify this flue environment data monitoring point as an environmental data monitoring point to be adjusted, and count to obtain the list of environmental data monitoring points to be adjusted.

[0068] In a preferred embodiment of the present invention, the adjustment of the gas flow rate of the corresponding gas nozzle needs to be dynamically monitored based on a preset gas nozzle adjustment time window. When it is monitored that a certain flue environment data monitoring point is an environmental data monitoring point to be adjusted, the gas supply amount adjustment is immediately executed. When it is monitored that a certain flue environment data monitoring point is not an environmental data monitoring point to be adjusted, the gas supply amount 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 after the afterburning operation, and then output the flue.

[0070] It should be noted that the core of the high-temperature oxidation module is the high-temperature catalyst layer. The high-temperature catalyst can further promote the chemical reaction between CO and oxygen in a high-temperature environment. Under the dual action of high temperature and catalyst, the remaining CO in the flue gas will more fully react with oxygen to be oxidized into CO2. The synergistic effect of the high-temperature environment and the high-efficiency catalyst greatly improves the rate and degree of the oxidation reaction, enabling CO to be removed more thoroughly.

[0071] It should be added that after high-temperature oxidation treatment, the CO content in the flue gas is significantly reduced, meeting the environmental protection emission standards. The purified flue gas can be safely discharged from the flue into the atmospheric environment, reducing environmental pollution. The high-temperature oxidation module ensures the stable and efficient operation of the entire sintering flue gas CO removal system, guarantees the final treatment effect, and is an important link in achieving environmental protection goals.

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

[0073] It should be noted that the present invention dynamically adjusts the gas supply amount 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 the stable operation of the system, ensure that the reaction temperature is in an appropriate range, extend the service life of the catalyst, and reduce the equipment maintenance cost.

[0074] Please refer to Figure 2 As shown, the second aspect of the present invention provides a control method for sintering flue gas CO removal, including: S1. Configure an adjustable-angle deflector array at the flue inlet and dynamically adjust the deflector angle based on the flue gas flow distribution data.

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

[0076] S3. Use a gas combustion supplement array to perform combustion supplement operation on the flue gas after low-temperature oxidation, collect temperature data and CO concentration data in real time, and dynamically adjust the gas supply amount based on the data.

[0077] S4. Set a high-temperature catalyst layer to perform high-temperature oxidation on the flue gas after combustion supplement operation, and then output it from the flue.

[0078] The above content is only an example and illustration of the concept of the present invention. Those skilled in the art of this technology can make various modifications, supplements, or use similar methods for substitution to the specific embodiments described, 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 protection scope of the present invention.

Claims

1. A control system for removing CO from sintering flue gas, characterized in that, Including: A flow - guiding optimization module, which configures an adjustable - angle flow - guiding plate array at the flue inlet and dynamically adjusts the angles of the flow - guiding plates based on the flue - gas flow - rate distribution data; A low - temperature oxidation module, which sets a low - temperature catalyst layer to perform low - temperature oxidation on the flue gas entering the flue through the adjustable - angle flow - guiding plate array; A supplementary combustion control module, which uses a gas supplementary combustion array to perform supplementary combustion on the flue gas after low - temperature oxidation, and real - time collects temperature data and CO concentration data, and dynamically adjusts the gas supply based on the above data; A high - temperature oxidation module, which sets a high - temperature catalyst layer to perform high - temperature oxidation on the flue gas after supplementary combustion operation, and then outputs the flue.

2. The control system for sintering flue gas CO removal according to claim 1, wherein: The specific implementation method of the flow - guiding optimization module is as follows: At the flue inlet, flow - velocity sensors are deployed corresponding to each flow - guiding port of the adjustable - angle flow - guiding plate array to form a flow - velocity sensor array. The flow - guiding ports of the adjustable - angle flow - guiding plate array are numbered, and the flow - velocity sensors are used to collect the flue - gas flow velocity of each flow - guiding port in real time; Flow - velocity sensors with flow - velocity values exceeding the preset range are screened through threshold comparison, and the numbers of the corresponding flow - guiding ports are determined through coordinate mapping to generate a sequence of flow - guiding ports to be adjusted; Calculate the absolute deviation value of the flow velocity corresponding to each flow - guiding port to be adjusted that exceeds the preset range, and sort the flow - guiding ports to be adjusted in descending order according to the absolute deviation value to obtain a priority order; Based on the fuzzy PID control algorithm, drive the servo motor to adjust the deflection angles of the flow - guiding vanes in turn according to the priority order.

3. The control system for sintering flue gas CO removal according to claim 2, characterized in that: The specific method for generating the sequence of flow - guiding ports to be adjusted is as follows: Based on the pre - set equal - interval time duration, obtain the flue - gas flow velocities of each flow - guiding port in a continuous number of time windows. Calculate the average flue - gas flow velocity by averaging the flue - gas flow velocities of each flow - guiding port in each time window. Then, perform deviation - degree analysis and calculation on the flue - gas flow velocity of each flow - guiding port and the average flue - gas flow velocity to obtain the flue - gas flow - velocity deviation degree of each flow - guiding port in each time window; Compare the flue - gas flow - velocity deviation degree of each flow - guiding port with the pre - set flue - gas flow - velocity deviation - degree threshold, and at the same time compare the flue - gas flow velocity of each flow - guiding port with the pre - set flue - gas flow - velocity threshold. Screen out the flow - guiding ports with a flue - gas flow - velocity deviation degree greater than the flue - gas flow - velocity deviation - degree threshold or a flue - gas flow velocity greater than the flue - gas flow - velocity threshold to construct an abnormal flow - guiding port sequence for each time window; Compare the abnormal flow - guiding port sequences of each time window, and mark the flow - guiding ports that are abnormal in a preset number of consecutive time windows as flow - guiding ports to be adjusted, and then further construct a sequence of flow - guiding ports to be adjusted.

4. The control system for sintering flue gas CO removal according to claim 3, characterized in that: The specific analysis method of the priority order is as follows: Extract the flue - gas flow - velocity deviation degrees of each flow - guiding port in a continuous number of time windows. Then, assign different weights to each time window according to the pre - set weight - assignment rule. Perform weight - fusion calculation on the flue - gas flow - velocity deviation degrees of each flow - guiding port in each time window and the corresponding weights to obtain the priority coefficient of each time window. Then, arrange the priority coefficients in descending order to construct the priority order.

5. The control system for sintering flue gas decarbonization according to claim 4, characterized in that: The specific analysis method for adjusting the deflection angle of the flow - guiding vane is as follows: Obtain the corresponding relationship between the adjustment angles of each flow - guiding vane and the flue - gas flow - velocity deviation degree based on the historical flow - guiding vane adjustment records; Classify the adjusted angles of the same deflector to obtain the corresponding flue gas velocity deviation degrees for each deflector adjusted angle. Then, calculate the average value of the flue gas velocity deviation degrees to obtain the flue gas velocity deviation degrees corresponding to each deflector adjusted angle, and construct a correlation model between the deflector adjusted angle and the flue gas velocity deviation degree. Input the flue gas velocity deviation degrees of each deflector to be adjusted into the correlation model between the deflector adjusted angle and the flue gas velocity deviation degree to obtain the deflector adjusted angles corresponding to each deflector to be adjusted. Then, adjust the deflection angle of the deflector based on the deflector adjusted angle.

6. The control system for sintering flue gas CO removal according to claim 2, characterized in that: The adjustment of the deflector deflection angle further includes: After completing a single adjustment, start the secondary flow velocity scan to verify the adjustment effect. If the flow velocity in the target area still exceeds the limit, trigger the iterative adjustment process. When the continuous adjustment times exceed the set threshold and the flow velocity deviation does not converge to the allowable range, generate an equipment fault code and push a warning signal to the operation and maintenance terminal through the industrial Internet of Things platform. Store each adjustment parameter and result in the historical database, and continuously optimize the PID control parameter set through machine learning algorithms to improve the subsequent regulation accuracy.

7. The control system for sintering flue gas CO removal according to claim 1, characterized in that: The specific analysis method for dynamically adjusting the gas supply amount is as follows: Obtain the positions of each gas injection port of the gas supplementary combustion array. Denote the center point of the flue gas cross-section area corresponding to each column of gas injection ports as the flue gas environment data monitoring point of this column of gas injection ports, and use the temperature acquisition device and the CO concentration acquisition device to collect the temperature and CO concentration of each flue gas environment data monitoring point. Conduct deviation analysis on the temperature and CO concentration respectively with the appropriate reaction temperature and appropriate reaction CO concentration preset for each flue gas environment data monitoring point to obtain the temperature deviation degree and CO concentration deviation degree of each flue gas environment data monitoring point. Then, conduct weighted fusion analysis to obtain the temperature adjustment demand coefficient corresponding to each flue gas environment data monitoring point. Compare the temperature adjustment demand coefficient with the preset temperature adjustment demand coefficient threshold, screen the list of flue gas environment data monitoring points to be adjusted, and then adjust the gas flow velocity of the corresponding gas injection port, and continuously monitor the flue gas environment information until the temperature adjustment demand coefficient is within the allowable threshold.

8. The control system for sintering flue gas decarbonization according to claim 7, wherein: The specific analysis method for the list of flue gas environment data monitoring points to be adjusted is as follows: Compare the temperature adjustment demand coefficient corresponding to each flue gas environment data monitoring point with the preset temperature adjustment demand coefficient threshold. If the temperature adjustment demand coefficient corresponding to a certain flue gas environment data monitoring point is greater than the temperature adjustment demand coefficient threshold, identify this flue gas environment data monitoring point as a flue gas environment data monitoring point to be adjusted, and statistically obtain the list of flue gas environment data monitoring points to be adjusted.

9. The control system for sintering flue gas CO removal according to claim 8, characterized in that: Adjusting the gas flow velocity of the corresponding gas injection port needs to be dynamically monitored based on the preset gas injection port adjustment time window. When it is monitored that a certain flue gas environment data monitoring point is a flue gas environment data monitoring point to be adjusted, immediately execute the gas supply amount adjustment. When it is monitored that a certain flue gas environment data monitoring point is not a flue gas environment data monitoring point to be adjusted, immediately stop executing the gas supply amount adjustment.

10. A control method for removing CO from sintering flue gas, characterized in that, Including: S1. Configure an adjustable angle deflector array at the flue gas inlet, and dynamically adjust the deflector angle based on the flue gas flow distribution data. S2. Set a low-temperature catalyst layer to perform low-temperature oxidation on the flue gas entering the flue through the adjustable angle deflector array. S3. Use the gas afterburning array to perform afterburning operation on the flue gas that has undergone low-temperature oxidation, collect temperature data and CO concentration data in real time, and dynamically adjust the gas supply based on the data; S4. Set a high-temperature catalyst layer to perform high-temperature oxidation on the flue gas that has undergone the afterburning operation, and then output the flue.

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