Sintering multi-temperature-stage exhaust gas cleaning disposal method based on function construction

Abstract

The application discloses a sintering multi-temperature-stage waste gas cleaning treatment method based on function construction, and mainly relates to the field of sintering furnace heat energy recovery. The method comprises the following steps: S1, a temperature monitoring assembly is installed in the sintering furnace in a diverging direction of the circumference with the center position of the bottom of the sintering furnace as a setting point, and the temperature inside the sintering furnace is monitored through the temperature monitoring assembly; S2, when the sintering of the steel material in the sintering furnace is completed and the sintering furnace needs to be cooled, the temperature information transmitted by the temperature detection assembly is processed by an integrated control system to obtain a space temperature function image of the sintering furnace under the cooling state. The application has the beneficial effect that targeted cooling treatment can be performed according to the temperature difference inside the sintering furnace, and targeted heat energy recovery can be performed according to different waste gas temperature states when the waste gas of the sintering furnace is treated, so that the heat energy recovery effect is optimized, and the rationalization of the recycling of the waste gas of the sintering furnace is ensured.

Description

Technical Field

[0001] This invention relates to the field of heat recovery in sintering furnaces, specifically a method for cleaning and treating sintering multi-temperature waste gas based on function construction. Background Technology

[0002] In the steel sintering production process, sintering furnace cooling is essential. Its working principle involves blowing ambient air over the high-temperature sintered ore to cool it, while simultaneously generating waste gas at different temperature ranges. Based on temperature differences, the waste gas from the annular cooler is typically divided into a high-temperature range (above 350℃), a medium-temperature range (300-350℃), and a low-temperature range (150-300℃). High-temperature and medium-temperature waste gas is mostly introduced into waste heat boilers for power generation, while low-temperature waste gas, due to its lower temperature and greater difficulty in recovery, is currently mostly treated by direct discharge. Traditional waste gas treatment methods directly obtain the temperature information at the waste gas outlet and then guide the waste gas into waste heat boilers or other heat recovery equipment according to different temperature values. However, it's important to consider that the temperature difference between the center and edge of the sintering furnace is uncertain. Traditional cooling methods are unidirectional and cannot determine the cooling method based on the specific temperature at different locations within the sintering furnace, thus affecting the cooling effect. Meanwhile, the treatment methods for exhaust gas after it is discharged cannot be tailored to the dynamic temperature changes in the sintering furnace, thus failing to optimize the treatment process. Furthermore, for low-temperature exhaust gas, which still contains a significant amount of sensible heat, direct discharge leads to the loss of waste heat resources and increases the overall energy consumption of the sintering process. Secondly, there is environmental pressure; directly discharged low-temperature exhaust gas contains small amounts of particulate matter, SO2, and other pollutants, increasing the burden on air pollution control and contradicting the current policy requirements for energy conservation, carbon reduction, and green development in the steel industry.

[0003] Based on the above problems, a method for cleaning and treating sintering multi-temperature-section exhaust gas based on function construction is proposed. This method can perform targeted cooling treatment according to the temperature difference inside the sintering furnace. At the same time, when treating the exhaust gas from the sintering furnace, targeted heat energy recovery is performed according to different exhaust gas temperature states, thereby achieving the best heat energy recovery effect and ensuring the rationalization of sintering furnace exhaust gas recycling and utilization. Summary of the Invention

[0004] The purpose of this invention is to provide a method for cleaning and treating sintering multi-temperature-section exhaust gas based on function construction. This method can perform targeted cooling treatment according to the temperature difference inside the sintering furnace. At the same time, when treating the exhaust gas from the sintering furnace, targeted heat energy recovery is performed according to different exhaust gas temperature states, thereby achieving the best heat energy recovery effect and ensuring the rationalization of sintering furnace exhaust gas recycling and utilization.

[0005] To achieve the above objectives, the present invention employs the following technical solution: The method for cleaning and treating sintering multi-temperature waste gas based on function construction includes the following steps: S1. A temperature monitoring component is installed inside the sintering furnace with the center of the bottom of the sintering furnace as the setting point and facing the circumferential divergence direction. The temperature monitoring component is used to monitor the temperature inside the sintering furnace. S2, When the sintering furnace is working, the installed temperature detection component monitors the temperature at different locations inside the sintering furnace and transmits it to the integrated control system in real time. When the steel material in the sintering furnace is sintered and it is necessary to cool down the sintering furnace, the integrated control system processes the temperature information transmitted by the temperature detection component to obtain a spatial temperature function image inside the sintering furnace under cooling conditions. S3, the blower assembly in the sintering furnace performs blower cooling operation on the sintering furnace according to the curvature change of the spatial temperature function graph; S4, the temperature of the cooling gas in the sintering furnace is monitored in real time. When the gas inside the sintering furnace is discharged, the exhaust gas conveying rate is determined by the temperature of the discharged cooling gas, and the function graph of exhaust gas temperature and conveying rate is plotted by the integrated control system. S5, based on the obtained graph of the functional relationship between exhaust gas temperature and conveying rate, the integrated control system controls the opening and closing degree of the rate valve and conveys the exhaust gas to the heat recovery equipment. S6, when the exhaust gas temperature does not meet the recovery temperature of the heat recovery equipment, stop conveying the exhaust gas into the heat recovery equipment and reverse the exhaust gas to convey it into the sintering furnace so that the exhaust gas cools down the temperature inside the sintering furnace. S7. Based on the spatial temperature function graph, when the temperature in the sintering furnace drops to the threshold of the curvature change between the center temperature and the edge temperature, the blower assembly will no longer blow air to cool the sintering furnace. Natural cooling will be used to make the center temperature and the edge temperature in the sintering furnace consistent. S8: After the waste gas in the heat recovery equipment is collected and treated, when the temperature meets the waste gas treatment temperature, the waste gas is sent to the purification equipment for purification and discharge, thereby completing the waste gas treatment operation.

[0006] In step S1, the temperature monitoring component is a thermocouple temperature measuring component, which is used to monitor the temperature information at different locations in the transverse direction inside the sintering furnace in real time.

[0007] The spatial temperature function graph in step S2 is constructed as follows: S21, the temperature detection component monitors the temperature at different locations inside the sintering furnace and transmits it to the integrated control system in real time. The integrated control system constructs a spatial temperature function coordinate system with the horizontal width of the sintering furnace as the horizontal axis and the temperature as the vertical axis. S22, the temperature information at different locations inside the sintering furnace detected by the temperature monitoring component is input into the spatial temperature function coordinate system, and adjacent values ​​are plotted to obtain a spatial temperature function graph. in, For edge temperature, The highest temperature is at the center, and x represents the horizontal position. This is the distribution width parameter.

[0008] In step S3, the method for performing the forced-air cooling operation based on the curvature change of the spatial temperature function graph is as follows: When the curvature change of the spatial temperature function graph is greater than A, where A is The highest temperature at the center and The temperature difference at the edges; S31, the blower assembly blows air towards the center of the sintering furnace at a normal distribution rate, so that the cooling gas acts on the center of the sintering furnace in a slow-to-fast manner to cool the steel material at the center of the sintering furnace. S32, when the curvature change of the spatial temperature function graph is less than A during the cooling process, the blower assembly changes the blowing mode, so that the blower gas is blown laterally from the edge of the sintering furnace, and the blowing rate still acts in a normal distribution mode of slow first and then fast. S33, when The highest temperature at the center and When the temperature difference at the edge is less than the blast cooling threshold, the blasting action towards the sintering furnace is stopped, and the furnace is allowed to cool down on its own. When the curvature change of the spatial temperature function graph is greater than A; S31, the blower assembly blows air at a normal distribution rate in a 45-degree angle towards the sintering furnace, so that the cooling gas acts on the 45-degree angle position of the sintering furnace in a slow-to-fast manner to cool the steel material in the sintering furnace. S32, when the curvature change of the spatial temperature function graph is less than A during the cooling process, the blower assembly changes the blowing mode, so that the blower gas is blown laterally from the edge of the sintering furnace, and the blowing rate still acts in a normal distribution mode of slow first and then fast. S33, when The highest temperature at the center and When the temperature difference at the edge is less than the blast cooling threshold, the blasting action towards the sintering furnace is stopped, and the furnace is allowed to cool down on its own.

[0009] The waste gas conveying adjustment method in step S4 includes the following steps: S41, the gas temperature sensing device in the conveying pipeline detects the gas temperature information and transmits the gas temperature information to the integrated control system. The integrated control system processes the data according to the temperature it receives. S42, according to Calculations were performed to obtain the optimal gas delivery flow rate under different temperature conditions, where For optimal gas delivery flow rate, The exhaust gas temperature, For equipment structural constants; By using the optimal flow rate at the corresponding temperature to transport the waste gas in different temperature ranges, the heat recovery efficiency can be maximized.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Traditional sintering furnaces directly discharge the waste gas generated during cooling into heat recovery equipment without considering the recovery efficiency at different temperatures. Therefore, this method treats waste gas at different temperatures to maximize the absorption of energy carried by the cooled waste gas, thereby maximizing energy utilization.

[0011] 2. Simultaneously, regarding the cooling state inside the sintering furnace, different cooling methods are adopted for different temperature states inside different sintering furnaces. This allows the temperature to drop faster while ensuring that the steel inside the sintering furnace does not sinter poorly or the cooling rate is too slow. Therefore, this method optimizes the cooling effect inside the sintering furnace during the cooling process and avoids the cooling drawbacks caused by different cooling methods. Attached Figure Description

[0012] Appendix Figure 1 This is a flowchart of the method of the present invention.

[0013] Appendix Figure 2 This is a graph of the space temperature function of the present invention.

[0014] Appendix Figure 3 This is a graph of the spatial temperature function with the operational data incorporated into this invention.

[0015] Appendix Figure 4 This is a graph showing the efficiency of the blower cooling system in this invention.

[0016] Appendix Figure 5 This is a graph of the blowing cooling efficiency based on the operational data of this invention. Detailed Implementation

[0017] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0018] Traditional cooling methods for sintering furnaces and waste gas treatment primarily involve applying cooling gas into the furnace. This allows for heat exchange between the gas and the furnace's internal air, lowering the temperature of the furnace components until a desired temperature is reached. The waste gas generated during this cooling process carries significant heat. This heat is recovered by sending the waste gas to a heat recovery device for heat exchange. However, this method doesn't consider the need for different cooling methods at varying temperatures within the furnace, leading to incomplete sintering of the steel and low cooling efficiency. Furthermore, directly discharging the waste gas into the heat recovery device results in low recovery efficiency. Therefore, considering the background technology and the aforementioned problems, a multi-temperature-range waste gas cleaning and treatment method based on function construction is designed, including the following steps: S1. A temperature monitoring component is installed inside the sintering furnace, with the center of the furnace bottom as the setting point and radiating outwards in a circular direction. This component monitors the temperature inside the furnace. Because the temperature at the center and edge of the steel material within the sintering furnace is inconsistent, the temperature monitoring component is set at the center of the furnace bottom in a circular direction to effectively construct a spatial temperature function graph inside the furnace in the following steps. This allows the temperature information at both the center and edge of the steel material inside the furnace to be monitored, with the furnace bottom as the horizontal axis of the function graph.

[0019] Regarding the specific setup of the temperature monitoring component, in step S1, the temperature monitoring component is a thermocouple temperature measuring component. This thermocouple temperature measuring component monitors the temperature information at different locations in the lateral direction within the sintering furnace in real time. Thermocouple temperature measuring components are common temperature measuring devices in sintering furnaces and calcining furnaces; during installation, direct installation near open flames should be avoided.

[0020] S2, When the sintering furnace is working, the installed temperature detection component monitors the temperature at different locations inside the sintering furnace and transmits it to the integrated control system in real time. When the steel material in the sintering furnace is sintered and it is necessary to cool down the sintering furnace, the integrated control system processes the temperature information transmitted by the temperature detection component to obtain a spatial temperature function image inside the sintering furnace under cooling conditions. Because the temperature difference between the inside and outside of the sintering furnace is inconsistent, the problems of poor steel sintering and low cooling efficiency that are common with traditional cooling methods are avoided. Therefore, a temperature monitoring component is used to monitor the temperature, and the data is processed by an integrated control system to obtain temperature information at different locations inside the sintering furnace. In subsequent operations, the spatial temperature function graph inside the sintering furnace can be observed to determine which cooling method should be used to avoid technical problems. The construction method of the spatial temperature function graph is as follows: S21, the temperature detection component monitors the temperature at different locations inside the sintering furnace and transmits it to the integrated control system in real time. The integrated control system constructs a spatial temperature function coordinate system with the horizontal width of the sintering furnace as the horizontal axis and the temperature as the vertical axis. S22, the temperature information at different locations inside the sintering furnace detected by the temperature monitoring component is input into the spatial temperature function coordinate system, and adjacent values ​​are plotted to obtain a spatial temperature function graph. in, For edge temperature, The highest temperature is at the center, and x represents the horizontal position. This is the distribution width parameter.

[0021] The above steps first involve constructing a spatial temperature coordinate system. This system uses the lateral width of the sintering furnace as the horizontal axis and temperature as the vertical axis, creating a spatial temperature function coordinate system. Temperature information from different locations within the sintering furnace is then input into this coordinate system to obtain a spatial temperature function graph. This graph reveals the edge temperature values ​​and the center height temperature values. Crucially, it allows for the determination of the difference between these two values, enabling further determination of the appropriate method for forced-air cooling. Simultaneously, during the cooling process, the spatial temperature function graph allows for the assessment of the cooling effect of different forced-air cooling methods. This facilitates adjustments to the forced-air cooling method based on the curvature changes of the spatial temperature function graph, ensuring that the aforementioned drawbacks within the sintering furnace are avoided while maximizing cooling efficiency.

[0022] In step S3, the blast furnace assembly uses the curvature change of the spatial temperature function graph to perform blast cooling within the sintering furnace. The optimal cooling method is to blast towards the edge of the furnace, maximizing the area of ​​heat applied to the steel. Simultaneously, the rapid temperature drop at the edge facilitates heat exchange between the center and the edge, resulting in the fastest cooling effect. However, if the temperature difference between the center and edge is significant, the edge will become too cold while the center remains too hot, leading to continuous overheating and undercooling at the edge. This can prevent the steel from sintering effectively in the first pass, resulting in incomplete sintering. Therefore, based on this issue, targeted blast cooling can be implemented using the spatial temperature function graph from step S2. When the curvature change of the spatial temperature function graph is greater than A, where A is The highest temperature at the center and The temperature difference at the edges; S31, the blower assembly blows air towards the center of the sintering furnace at a normal distribution rate, so that the cooling gas acts on the center of the sintering furnace in a slow-to-fast manner to cool the steel material at the center of the sintering furnace. S32, when the curvature change of the spatial temperature function graph is less than A during the cooling process, the blower assembly changes the blowing mode, so that the blower gas is blown laterally from the edge of the sintering furnace, and the blowing rate still acts in a normal distribution mode of slow first and then fast. S33, when The highest temperature at the center and When the temperature difference at the edge is less than the blast cooling threshold, the blasting action towards the sintering furnace is stopped, and the furnace is allowed to cool down on its own. The operating procedure here involves first cooling the center area to reduce the temperature difference between the center and the edge, and then cooling the edge area. This ensures that the internal temperature of the furnace meets the cooling efficiency requirements while preventing incomplete sintering of the steel material. It is important to note that a normally distributed airflow rate should be used during the blasting operation, i.e., a slow-to-faster airflow pattern directed towards the sintering furnace. This greatly reduces the risk of excessive impurities in the outermost edges of the sintering furnace due to rapid supercooling.

[0023] When the curvature change of the spatial temperature function graph is greater than A; S31, the blower assembly blows air at a normal distribution rate in a 45-degree angle towards the sintering furnace, so that the cooling gas acts on the 45-degree angle position of the sintering furnace in a slow-to-fast manner to cool the steel material in the sintering furnace. S32, when the curvature change of the spatial temperature function graph is less than A during the cooling process, the blower assembly changes the blowing mode, so that the blower gas is blown laterally from the edge of the sintering furnace, and the blowing rate still acts in a normal distribution mode of slow first and then fast. S33, when The highest temperature at the center and When the temperature difference at the edge is less than the blast cooling threshold, the blasting action towards the sintering furnace is stopped, and the furnace is allowed to cool down on its own.

[0024] Unlike situations where there is a significant temperature difference between the center and the edges, this method employs a 45-degree angled airflow towards the sintering furnace. This effectively reduces the temperature at both the center and edges of the furnace. It's also important to note that the spatial temperature function graph changes continuously during this cooling process. Therefore, the angle of the airflow can be adjusted based on the curvature of this graph to address the dynamic temperature changes within the sintering furnace, thereby achieving the optimal cooling effect.

[0025] S4, the temperature of the cooling gas in the sintering furnace is monitored in real time. When the gas inside the sintering furnace is discharged, the exhaust gas conveying rate is determined by the temperature of the discharged cooling gas, and the function graph of exhaust gas temperature and conveying rate is plotted by the integrated control system. S5, based on the obtained graph of the functional relationship between exhaust gas temperature and conveying rate, the integrated control system controls the opening and closing degree of the rate valve and conveys the exhaust gas to the heat recovery equipment. Traditional waste gas transport methods directly deliver waste gas to heat recovery equipment without considering the equipment's recovery efficiency. Therefore, when introducing waste gas at different temperatures into the heat recovery equipment, it's difficult to achieve high heat recovery efficiency. In other words, it's impossible to effectively determine the optimal gas transport rate and recovery efficiency at a given temperature. Therefore, the waste gas transport regulation method considered to address these issues includes the following steps: S41, the gas temperature sensing device in the conveying pipeline detects the gas temperature information and transmits the gas temperature information to the integrated control system. The integrated control system processes the data according to the temperature it receives. S42, according to Calculations were performed to obtain the optimal gas delivery flow rate under different temperature conditions, where For optimal gas delivery flow rate, The exhaust gas temperature, For equipment structural constants; By using the optimal flow rate at the corresponding temperature to transport the waste gas in different temperature ranges, the heat recovery efficiency can be maximized.

[0026] In the above calculation formula, the relationship of the convective heat transfer coefficient is as follows: In turbulent heat transfer inside the pipe, the heat transfer coefficient h∝v0.8, and the higher the flow velocity, the stronger the heat transfer. At the same time, the higher the flow velocity, the shorter the residence time of the gas in the heat exchanger, resulting in insufficient heat transfer and decreased efficiency. Combining these two effects and finding the extreme value between "total recovered heat" and "recovery efficiency," we can derive: As temperature increases, gas density decreases and viscosity changes more, requiring higher flow rates to maintain sufficient heat transfer. Therefore, the optimal flow rate increases with increasing temperature, exhibiting a square root relationship. Thus, the above calculations allow the integrated control system to control the valve body and consequently the waste gas flow rate, thereby ensuring the recovery efficiency of the heat recovery equipment.

[0027] S6, when the exhaust gas temperature does not meet the recovery temperature of the heat recovery equipment, stop conveying the exhaust gas into the heat recovery equipment and reverse the exhaust gas to convey it into the sintering furnace so that the exhaust gas cools down the temperature inside the sintering furnace. S7. Based on the spatial temperature function graph, when the temperature in the sintering furnace drops to the threshold of the curvature change between the center temperature and the edge temperature, the blower assembly will no longer blow air to cool the sintering furnace. Natural cooling will be used to make the center temperature and the edge temperature in the sintering furnace consistent. For the treatment of low-temperature exhaust gas, this method adopts a circulating cooling approach, that is, the exhaust gas is reintroduced into the sintering furnace for cooling. Because even with a slow rate of heat recovery, it is difficult for the heat recovery equipment to recover usable heat energy at excessively low temperatures. Therefore, based on the overall efficiency issue, combined with the function graph in step S5, it can be determined at what temperature heat recovery will cease and the exhaust gas treatment method in step S6 will be adopted.

[0028] S8: After the waste gas in the heat recovery equipment is collected and treated, when the temperature meets the waste gas treatment temperature, the waste gas is sent to the purification equipment for purification and discharge, thereby completing the waste gas treatment operation.

[0029] Therefore, the sintering multi-temperature section exhaust gas cleaning and treatment method based on function construction can perform targeted cooling treatment according to the temperature difference inside the sintering furnace. At the same time, when treating the exhaust gas from the sintering furnace, targeted heat energy recovery is carried out according to different exhaust gas temperature states, so as to achieve the best heat energy recovery effect and ensure the rationalization of sintering furnace exhaust gas recycling and utilization.

Claims

1. A method for cleaning and treating sintering multi-temperature zone exhaust gas based on function construction, characterized in that: Includes the following steps: S1. A temperature monitoring component is installed inside the sintering furnace with the center of the bottom of the sintering furnace as the setting point and facing the circumferential divergence direction. The temperature monitoring component is used to monitor the temperature inside the sintering furnace. S2, When the sintering furnace is working, the installed temperature detection component monitors the temperature at different locations inside the sintering furnace and transmits it to the integrated control system in real time. When the steel material in the sintering furnace is sintered and it is necessary to cool down the sintering furnace, the integrated control system processes the temperature information transmitted by the temperature detection component to obtain a spatial temperature function image inside the sintering furnace under cooling conditions. S3, the blower assembly in the sintering furnace performs blower cooling operation on the sintering furnace according to the curvature change of the spatial temperature function graph; S4, the temperature of the cooling gas in the sintering furnace is monitored in real time. When the gas inside the sintering furnace is discharged, the exhaust gas conveying rate is determined by the temperature of the discharged cooling gas, and the function graph of exhaust gas temperature and conveying rate is plotted by the integrated control system. S5, based on the obtained graph of the functional relationship between exhaust gas temperature and conveying rate, the integrated control system controls the opening and closing degree of the rate valve and conveys the exhaust gas to the heat recovery equipment. S6, when the exhaust gas temperature does not meet the recovery temperature of the heat recovery equipment, stop conveying the exhaust gas into the heat recovery equipment and reverse the exhaust gas to convey it into the sintering furnace so that the exhaust gas cools down the temperature inside the sintering furnace. S7. Based on the spatial temperature function graph, when the temperature in the sintering furnace drops to the threshold of the curvature change between the center temperature and the edge temperature, the blower assembly will no longer blow air to cool the sintering furnace. Natural cooling will be used to make the center temperature and the edge temperature in the sintering furnace consistent. S8: After the waste gas in the heat recovery equipment is collected and treated, when the temperature meets the waste gas treatment temperature, the waste gas is sent to the purification equipment for purification and discharge, thereby completing the waste gas treatment operation.

2. The method for cleaning and treating sintering multi-temperature zone exhaust gas based on function construction according to claim 1, characterized in that: In step S1, the temperature monitoring component is a thermocouple temperature measuring component, which is used to monitor the temperature information at different locations in the transverse direction inside the sintering furnace in real time.

3. The method for cleaning and treating sintering multi-temperature zone exhaust gas based on function construction according to claim 1, characterized in that: The spatial temperature function graph in step S2 is constructed as follows: S21, the temperature detection component monitors the temperature at different locations inside the sintering furnace and transmits it to the integrated control system in real time. The integrated control system constructs a spatial temperature function coordinate system with the horizontal width of the sintering furnace as the horizontal axis and the temperature as the vertical axis. S22, the temperature information at different locations inside the sintering furnace detected by the temperature monitoring component is input into the spatial temperature function coordinate system, and adjacent values ​​are plotted to obtain a spatial temperature function graph. in, For edge temperature, The highest temperature is at the center, x is the lateral position, and is the distribution width parameter.

4. The method for cleaning and treating sintering multi-temperature zone exhaust gas based on function construction according to claim 1, characterized in that: In step S3, the method for performing the forced-air cooling operation based on the curvature change of the spatial temperature function graph is as follows: When the curvature change of the spatial temperature function graph is greater than A, where A is The highest temperature at the center and The temperature difference at the edges; S31, the blower assembly blows air towards the center of the sintering furnace at a normal distribution rate, so that the cooling gas acts on the center of the sintering furnace in a slow-to-fast manner to cool the steel material at the center of the sintering furnace. S32, when the curvature change of the spatial temperature function graph is less than A during the cooling process, the blower assembly changes the blowing mode, so that the blower gas is blown laterally from the edge of the sintering furnace, and the blowing rate still acts in a normal distribution mode of slow first and then fast. S33, when The highest temperature at the center and When the temperature difference at the edge is less than the blast cooling threshold, the blasting action towards the sintering furnace is stopped, and the furnace is allowed to cool down on its own. When the curvature change of the spatial temperature function graph is greater than A; S31, the blower assembly blows air at a normal distribution rate in a 45-degree angle towards the sintering furnace, so that the cooling gas acts on the 45-degree angle position of the sintering furnace in a slow-to-fast manner to cool the steel material in the sintering furnace. S32, when the curvature change of the spatial temperature function graph is less than A during the cooling process, the blower assembly changes the blowing mode, so that the blower gas is blown laterally from the edge of the sintering furnace, and the blowing rate still acts in a normal distribution mode of slow first and then fast. S33, when The highest temperature at the center and When the temperature difference at the edge is less than the blast cooling threshold, the blasting action towards the sintering furnace is stopped, and the furnace is allowed to cool down on its own.

5. The method for cleaning and treating sintering multi-temperature zone exhaust gas based on function construction according to claim 1, characterized in that: The waste gas conveying adjustment method in step S4 includes the following steps: S41, the gas temperature sensing device in the conveying pipeline detects the gas temperature information and transmits the gas temperature information to the integrated control system. The integrated control system processes the data according to the temperature it receives. S42, according to Calculations were performed to obtain the optimal gas delivery flow rate under different temperature conditions, where For optimal gas delivery flow rate, The exhaust gas temperature, For equipment structural constants; By using the optimal flow rate at the corresponding temperature to transport the waste gas in different temperature ranges, the heat recovery efficiency can be maximized.

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