A method and system for regulating the flow of acid gas processing tail gas

Abstract

The present application relates to acid-making tail gas treatment technical field, especially to a kind of acid-making tail gas treatment flow regulating method and system, including real-time acquisition multiple tail gas source parameters, incinerator operating condition and VOCs processing system operating state, according to calculate incinerator oxygen-enriched air pipeline can receive tail gas flow and target oxygen content ratio threshold, generate initial delivery instruction, linkage adjust oxygen-enriched air quantity and tail gas delivery flow rate.In the delivery process, if interlock switching condition is satisfied, automatically switch tail gas to VOCs processing system;Whole process monitoring pipeline pressure and furnace operating condition, when interlock parking condition is reached, trigger emergency shutdown protection, close import and export emergency shutdown valve to realize safety isolation.Through the present application, realize the dynamic linkage adjustment of acid-making tail gas delivery flow and incinerator oxygen-enriched air ratio, with interlock switching and emergency shutdown protection function, both ensure tail gas high-temperature incineration resource treatment effect, and improve the operating stability and essential safety level of acid-making system.

Description

Technical Field

[0001] This invention relates to the technical field of acid production tail gas treatment, and in particular to a method and system for adjusting the flow rate of acid production tail gas. Background Technology

[0002] In the industrial production of sulfuric acid, equipment such as slurry tanks, centrifuges, concentration towers, and condensation towers in the acid pretreatment process continuously generate tail gas containing VOCs, H2S, and organic sulfur. Currently, in conventional treatment processes, this tail gas is transported to a positive pressure VOCs treatment system via a fan, and then treated sequentially in an alkaline scrubbing tower, acid scrubbing tower, and water scrubbing tower before being discharged in compliance with standards. However, in actual production operation, due to the long distance between the acid production area and the VOCs treatment system, the long process pipelines, and the low negative pressure and insufficient suction in the tail gas pipelines, tail gas is prone to escape from the site. This not only causes odor pollution in the plant area but also poses a safety risk of flammable and toxic gas accumulation.

[0003] Existing methods directly feed acid production tail gas into the acid production incinerator for incineration. The high temperature of the incinerator (1100-1200℃) completely oxidizes and decomposes VOCs in the tail gas, while simultaneously oxidizing sulfur components to SO2, connecting it to subsequent acid production conversion processes and achieving resource recovery of the tail gas. However, existing methods lack a linkage mechanism between the acid production tail gas flow rate and the oxygen-enriched air ratio in the incinerator. This makes it impossible to dynamically adjust the tail gas flow rate according to the real-time operating conditions of the incinerator and the needs of the acid production process, easily leading to substandard oxygen content in the mixed gas, affecting incineration efficiency and the stable operation of subsequent acid production conversion processes. Summary of the Invention

[0004] This invention provides a method and system for adjusting the flow rate of acid production tail gas, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A method for regulating the flow rate of acid production tail gas treatment includes: Real-time data collection of exhaust gas parameters from multiple exhaust gas sources in the acid production process, real-time operating parameters of the incinerator, and real-time operating status parameters of the VOCs treatment system. Based on the real-time operating parameters of the incinerator, calculate the acceptable exhaust gas flow rate threshold and the target oxygen content ratio threshold of the oxygen-enriched air duct of the incinerator. Based on the acceptable tail gas flow rate threshold, an initial delivery command for acid production tail gas is generated, and the booster fan is controlled to deliver the acid production tail gas to the oxygen-enriched air pipeline of the incinerator. At the same time, according to the target oxygen content ratio threshold, the oxygen-enriched air intake and the delivery flow rate of acid production tail gas are adjusted in real time. During the transportation of acid production tail gas, the operating status of the incinerator is continuously monitored. When the incinerator is found to meet the preset interlocking switching trigger conditions, a switching transportation command is generated to cut off the transportation path of acid production tail gas to the incinerator and control the booster fan to switch the acid production tail gas to the VOCs treatment system. Throughout the entire process of transporting acid tail gas, the pressure parameters of the transport pipeline and the incinerator's internal operating parameters are monitored in real time. When the preset interlocking shutdown trigger condition is detected, the emergency cut-off protection mechanism is triggered, and the inlet and outlet emergency shut-off valves of the acid tail gas transport pipeline are closed simultaneously to complete the safe isolation treatment of the acid tail gas.

[0006] Furthermore, real-time exhaust gas parameters from multiple exhaust gas sources in the acid production process are collected, including: Sensors were placed at the tail gas outlets of the slurry tank, centrifuge, thickening tower, and condensation tower to collect tail gas flow rate, VOCs concentration, H2S concentration, organic sulfur concentration, oxygen content, temperature, and pressure for each tail gas source. The exhaust gas parameters of each exhaust gas source are summarized and merged to obtain the real-time exhaust gas parameters of the acid production exhaust gas.

[0007] Furthermore, before aggregating and integrating the exhaust parameters from each exhaust source, data verification is also included: Determine whether the exhaust gas parameters collected from each exhaust gas source are within the preset conventional process range; If any parameter exceeds the preset range of the conventional process, the corresponding sensor will be controlled to perform instantaneous resampling. If the parameters after resampling are still outside the preset normal process range, a sensor anomaly alert will be triggered and the data set will be removed. Only parameters that pass verification or re-sampling will be used for subsequent aggregation and fusion calculations.

[0008] Furthermore, based on the real-time operating parameters of the incinerator, the acceptable exhaust gas flow rate threshold and the target oxygen content ratio threshold of the incinerator's oxygen-enriched air duct are calculated, including: Obtain real-time furnace temperature, furnace negative pressure, initial oxygen content of oxygen-enriched air, and SO2 concentration requirements for the conversion process of the incinerator; The maximum exhaust gas treatment load of the incinerator is calculated based on real-time furnace temperature and furnace negative pressure. Based on the initial oxygen content of oxygen-enriched air, the real-time oxygen content of acid production tail gas, and the SO2 concentration requirements of the conversion process, the target oxygen content range after mixing oxygen-enriched air and acid production tail gas is calculated. Based on the maximum exhaust gas treatment load and the target oxygen content range, the acceptable exhaust gas flow rate threshold and the target oxygen content ratio threshold are calculated respectively.

[0009] Furthermore, based on the target oxygen content ratio threshold, the intake volume of oxygen-enriched air and the delivery flow rate of acid-producing tail gas are adjusted in real time, including: Real-time acquisition of measured oxygen content in the mixed gas inside the oxygen-enriched air pipeline; Calculate the deviation between the measured oxygen content and the target oxygen content ratio threshold; When the deviation value exceeds the preset allowable deviation range, the deviation value is used as the closed-loop adjustment input to synchronously adjust the opening of the intake regulating valve of the oxygen-enriched air pipeline and the operating frequency of the booster fan until the measured oxygen content falls back to the preset allowable deviation range.

[0010] Furthermore, the preset interlocking switching trigger conditions include: the incinerator triggers a planned shutdown and maintenance instruction, the incinerator temperature remains below the preset minimum combustion temperature threshold, the oxygen-enriched air supply to the incinerator is interrupted, or the SO2 concentration in the conversion process remains above the preset process threshold.

[0011] Furthermore, controlling the booster fan to switch the acid production tail gas to the VOCs treatment system includes: During the switching process, the operating frequency of the booster fan is dynamically adjusted according to the real-time operating load of the VOCs treatment system to control the flow rate of the acid production tail gas to not exceed the maximum capacity of the VOCs treatment system. The corresponding treatment processes of the alkaline scrubbing tower, acid scrubbing tower, and water scrubbing tower of the VOCs treatment system are simultaneously activated to complete the backup path treatment of the acid production tail gas.

[0012] Furthermore, the preset interlock shutdown trigger conditions include: the incinerator triggers an emergency shutdown command, the pressure in the delivery pipeline continuously exceeds the preset safety pressure threshold, the negative pressure in the furnace undergoes a reverse change, or the concentration of combustible gas in the delivery pipeline is detected to exceed the preset safety threshold.

[0013] Furthermore, the opening degree of the intake regulating valve of the oxygen-enriched air duct and the operating frequency of the booster fan are adjusted synchronously, including: When the measured oxygen content is lower than the lower limit of the target oxygen content ratio threshold, the opening of the intake regulating valve is linearly increased according to the first regulating slope, and the operating frequency of the booster fan is linearly decreased according to the second regulating slope, wherein the value of the second regulating slope is less than the first regulating slope. When the measured oxygen content is higher than the upper limit of the target oxygen content ratio threshold, the opening of the intake regulating valve is reduced and the operating frequency of the booster fan is increased, and the increased operating frequency of the booster fan does not exceed the reference operating frequency based on the acceptable exhaust gas flow rate threshold mapping.

[0014] On the other hand, the present invention also provides a flow regulation system for treating acid production tail gas, comprising: The data acquisition module is used to collect real-time tail gas parameters from multiple tail gas sources in the acid production process, real-time operating condition parameters of the incinerator, and real-time operating status parameters of the VOCs treatment system. The threshold calculation module is used to calculate the acceptable exhaust gas flow rate threshold and the target oxygen content ratio threshold of the oxygen-enriched air pipeline of the incinerator based on the real-time operating parameters of the incinerator. The delivery control module is used to generate an initial delivery command for the acid production tail gas based on the acceptable tail gas flow rate threshold, control the booster fan to deliver the acid production tail gas to the oxygen-enriched air pipeline of the incinerator, and simultaneously adjust the oxygen-enriched air intake and the delivery flow rate of the acid production tail gas in real time according to the target oxygen content ratio threshold. The interlocking switching module is used to continuously monitor the operating status of the incinerator during the transportation of acid production tail gas. When it is detected that the incinerator meets the preset interlocking switching trigger conditions, a switching transportation command is generated to cut off the transportation path of acid production tail gas to the incinerator and control the booster fan to switch the acid production tail gas to the VOCs treatment system. The safety protection module is used to monitor the pressure parameters of the conveying pipeline and the furnace operating parameters of the incinerator in real time during the entire process of acid production tail gas transportation. When the preset interlock shutdown trigger condition is detected, the emergency cut-off protection mechanism is triggered, and the inlet and outlet emergency shut-off valves of the acid production tail gas conveying pipeline are closed simultaneously to complete the safe isolation treatment of acid production tail gas.

[0015] The technical solution of this invention can achieve the following technical effects: By collecting and verifying multi-dimensional parameters in real time, the accuracy of exhaust gas parameters and equipment operating data is ensured, providing a reliable basis for adjustment. By establishing a linkage adjustment mechanism between the oxygen-enriched air ratio and the exhaust gas delivery flow rate of the incinerator, and dynamically adjusting the exhaust gas delivery volume and oxygen-enriched air intake volume in conjunction with the real-time operating conditions of the incinerator, the oxygen content of the mixed gas can be precisely controlled within the target range. This ensures the combustion effect while ensuring the stable operation of the acid conversion process, realizing the resource utilization of acid production exhaust gas. By setting up a dual protection mechanism of interlock switching and interlock shutdown, it can quickly switch to the VOCs backup treatment path when the incinerator operating conditions are abnormal, avoiding odor pollution and safety risks caused by disorderly exhaust gas emissions. It can also promptly cut off the exhaust gas delivery and complete safety isolation in the event of an emergency safety hazard. This comprehensively improves the safety, stability, and efficiency of acid production exhaust gas treatment, taking into account both environmental compliance and the continuity of the production process, reducing production safety hazards and environmental governance costs.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic flowchart of a method for adjusting the flow rate of acid production tail gas according to the present invention. Figure 2 This is a schematic diagram of the flow regulation system for treating acid production tail gas according to the present invention. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] like Figure 1 As shown, the present invention provides a method for adjusting the flow rate of acid production tail gas, which specifically includes the following steps: Step S1: Real-time acquisition of real-time tail gas parameters from multiple tail gas sources in the acid production process, real-time operating condition parameters of the incinerator, and real-time operating status parameters of the VOCs treatment system. Step S2: Calculate the acceptable tail gas flow rate threshold and target oxygen content ratio threshold of the oxygen-enriched air pipeline of the incinerator based on the real-time operating parameters of the incinerator. Step S3: Based on the acceptable tail gas flow rate threshold, generate the initial delivery command for acid production tail gas, control the booster fan to deliver the acid production tail gas to the oxygen-enriched air pipeline of the incinerator, and at the same time, adjust the oxygen-enriched air intake and the delivery flow rate of acid production tail gas in real time according to the target oxygen content ratio threshold. Step S4: During the acid production tail gas transportation process, continuously monitor the operating status of the incinerator. When it is detected that the incinerator meets the preset interlocking switching trigger conditions, generate a switching transportation command, cut off the transportation path of acid production tail gas to the incinerator, and control the booster fan to switch the acid production tail gas to the VOCs treatment system. Step S5: During the entire process of transporting acid tail gas, the pressure parameters of the transport pipeline and the furnace operating parameters of the incinerator are monitored in real time. When the preset interlock shutdown trigger condition is detected, the emergency cut-off protection mechanism is triggered, and the inlet and outlet emergency shut-off valves of the acid tail gas transport pipeline are closed simultaneously to complete the safe isolation treatment of the acid tail gas.

[0022] In this embodiment, by combining real-time multi-source parameter acquisition, incinerator flow rate and oxygen content ratio adjustment, operating condition interlocking switching, and emergency safety shut-off, the safety risks of tail gas escape, odor pollution, and accumulation of combustible and toxic gases caused by long pipelines and low negative pressure in traditional processes can be solved. This addresses the problems of existing incineration methods lacking flow rate and oxygen-enriched air linkage adjustment, oxygen content not meeting standards affecting incineration efficiency, and stable operation of the acid conversion process. The coordinated steps form a closed-loop intelligent control system that can dynamically adapt to the real-time operating conditions of the incinerator and the needs of the acid production process. While achieving high-temperature incineration and resource utilization of acid production tail gas, it ensures compliant oxygen content ratio and sufficient VOCs oxidation and decomposition in the furnace. Furthermore, the dual interlocking mechanism enables automatic safety switching and emergency isolation under abnormal operating conditions, achieving the effects of environmental protection, resource utilization, process stability, and safe production.

[0023] In a specific implementation, as one example, given the significant differences in parameters such as tail gas composition, flow rate, and temperature among the four types of tail gas sources in the acid pretreatment process—the slurry tank, centrifuge, concentration tower, and condensation tower—collecting only the parameters of the main pipeline can easily lead to data distortion, failing to provide an accurate data source for subsequent incinerator ratio adjustment and interlock control. Therefore, a multi-point, multi-parameter parallel acquisition and aggregation mechanism is needed to ensure the comprehensiveness, real-time performance, and accuracy of the collected data. This embodiment collects parameters at the outlets of each tail gas source, simultaneously collects relevant parameters from the incinerator and VOCs treatment system, and uses a weighted fusion method to process the multi-source data, as detailed below: Step S11: Set up independent collection points at the tail gas outlet pipes of the slurry tank, centrifuge, thickening tower, and condensation tower. Each collection point is equipped with a flow sensor, VOCs concentration sensor, H2S concentration sensor, organic sulfur concentration sensor, oxygen content sensor, temperature sensor, and pressure sensor to collect tail gas parameters from each tail gas source. At the corresponding monitoring points of the incinerator, install temperature sensors, pressure sensors, oxygen content sensors, and SO2 concentration sensors to collect real-time operating parameters of the incinerator. At the corresponding monitoring points of the VOCs treatment system, install status sensors and load sensors to collect real-time operating status parameters of the VOCs treatment system. Step S12: Based on the response speed of the on-site acid production process, set a uniform sampling frequency for all sensors. The sampling frequency can be adjusted according to the actual needs of the on-site process, such as a 50Hz sampling frequency, to ensure that the acquisition of each parameter is synchronized without lag, and to avoid deviations in data integration and ratio calculation due to inconsistent acquisition frequencies of different parameters, thus ensuring the synchronicity and timeliness of the acquisition of various parameters. Step S13: According to the set unified sampling frequency, the exhaust gas flow rate, VOCs concentration, H2S concentration, organic sulfur concentration, oxygen content, temperature, and pressure parameters are simultaneously collected at each exhaust gas source sampling point. The flow rate parameter is used to determine the real-time output scale of each exhaust gas source, providing a weighting basis for aggregation and fusion. The VOCs concentration, H2S concentration, and organic sulfur concentration parameters are used to clarify the specific content of combustible and toxic components in the exhaust gas, providing support for judging the combustion safety and incineration effect. The oxygen content parameter is used to determine the proportion of combustion-supporting components in the exhaust gas itself, avoiding oxygen content deviations when mixed with oxygen-enriched air. The temperature and pressure parameters are used to monitor the operating status of the exhaust gas outlet pipeline, predict pipeline transport stability, and provide data reference for pressure compensation during flow rate adjustment. The incinerator monitoring point simultaneously collects furnace temperature, furnace negative pressure, and... The system collects the initial oxygen content of the oxygen-enriched air and the measured real-time SO2 concentration during the conversion process. The furnace temperature parameter is used to determine the incinerator's current effective oxidation and decomposition capacity; the furnace negative pressure parameter is used to determine the incinerator's air intake space margin; the initial oxygen content parameter of the oxygen-enriched air is used to determine the adjustment space for the oxygen content after mixing with the acid-producing tail gas; and the measured real-time SO2 concentration during the conversion process is used to provide feedback on the real-time operating status of the acid-producing conversion process, providing feedback for the linkage adjustment of the tail gas delivery flow rate and the oxygen-enriched air ratio. The VOCs treatment system monitoring points simultaneously collect the operating status of the alkali washing tower, acid washing tower, and water washing tower, as well as the system's real-time processing load. The operating status parameter is used to determine the system's availability as a backup treatment path, and the processing load parameter is used to limit the upper limit of the acid-producing tail gas delivery flow rate during subsequent interlocking switching to prevent exceeding the system's processing capacity. Step S14: Verify the collected data and clarify the normal process range of various parameters; if the data is qualified, it is retained for subsequent processing; if there is an anomaly, it is resampled once by the same sensor. If the resampled data is qualified, it is retained; if it is unqualified, the sensor anomaly prompt is triggered to ensure data reliability. Step S15: Collect valid data from each collection point after preliminary verification. Using the real-time flow rate of each exhaust gas source as a weighting coefficient, perform weighted summarization and fusion of similar parameters for the four types of exhaust gas sources. That is, multiply the VOCs concentration, H2S concentration, organic sulfur concentration, oxygen content, temperature and pressure of each exhaust gas source by the corresponding exhaust gas source flow rate, sum them, and then divide by the total flow rate of the four types of exhaust gas sources to obtain the total flow rate, weighted average VOCs concentration, weighted average H2S concentration, weighted average organic sulfur concentration, weighted average oxygen content, weighted average temperature and total pressure parameters of the acid production exhaust gas, forming a complete real-time comprehensive parameter group for acid production exhaust gas, realizing the transformation of dispersed exhaust gas source parameters into a unified data source. Step S16: The aggregated and integrated real-time comprehensive parameters of the acid production tail gas are combined with the verified real-time operating parameters of the incinerator and the real-time operating status parameters of the VOCs treatment system to form a complete real-time data source.

[0024] In this embodiment, by uniformly arranging sensors and setting a uniform acquisition frequency, the synchronous acquisition of various parameters can be achieved, and the standardized sensor arrangement ensures the accuracy of the acquired data and avoids data deviation. Uniform verification of the measured parameters acquired by all sensors to remove abnormal data ensures the reliability of the data used for subsequent processing, avoiding adjustment deviations or safety hazards caused by abnormal data. The use of flow-weighted fusion ensures that the aggregated comprehensive parameters of the acidification tail gas accurately reflect the overall tail gas characteristics, providing accurate data support for ratio adjustment. Simultaneously, it enables coordinated linkage of data acquired by multiple system sensors, providing data source support for the implementation of the entire acidification tail gas treatment flow adjustment method.

[0025] In some embodiments of the present invention, existing acid production tail gas incineration treatment lacks a basis for the linkage adjustment of tail gas delivery flow rate and oxygen-enriched air ratio. Relying solely on fixed parameters for tail gas delivery can easily lead to issues such as unsuitable oxygen content in the mixed gas, incomplete combustion, or tail gas delivery exceeding the incinerator's processing capacity, thereby affecting the stable operation of subsequent conversion processes. Based on these problems, this embodiment obtains key correlation parameters, calculates the core load and oxygen content range, and derives the acceptable tail gas flow rate threshold and target oxygen content ratio threshold to achieve coordinated adaptation between tail gas delivery and incineration / conversion processes. Specifically, the following operations are performed: Step S21: Obtain the real-time furnace temperature, furnace negative pressure, initial oxygen content of the oxygen-enriched air, and SO2 concentration requirements for the conversion process of the incinerator. The real-time furnace temperature directly determines the completeness of VOCs oxidation and decomposition in the exhaust gas. Too high or too low a temperature will affect the combustion effect. Simultaneously, temperature changes are related to the internal heat load of the incinerator, thus determining its capacity to handle exhaust gas. The furnace negative pressure reflects the stability of the airflow inside the incinerator. Excessive negative pressure can easily lead to the infiltration of outside air, while insufficient negative pressure will cause exhaust gas to stagnate inside the furnace, both affecting combustion efficiency and furnace operating stability. Furthermore, the negative pressure parameter is directly related to the incinerator's intake air carrying capacity. The initial oxygen content of the oxygen-enriched air... The initial oxygen content is the basis for the final oxygen content of the mixed gas, and its value directly affects the accuracy of the proportion calculation. If this parameter is ignored, the oxygen content of the mixed gas will deviate from the process requirements. The SO2 concentration requirement parameter of the conversion process is the core process indicator of the acid conversion process. The SO2 produced after the tail gas is incinerated must meet the requirements of this parameter; otherwise, it will affect the subsequent conversion efficiency and product quality. Therefore, this parameter is a constraint condition for the oxygen content proportion calculation to ensure that the incineration products meet the requirements of the conversion process. The SO2 concentration requirement parameter of the conversion process is preset and entered in conjunction with the product quality standards and conversion efficiency requirements of the acid conversion process, and participates in the calculation as a fixed constraint parameter. Step S22: Based on the acquired real-time furnace temperature and furnace negative pressure, calculate the maximum tail gas treatment load of the incinerator. The real-time furnace temperature and furnace negative pressure jointly determine the actual treatment capacity of the incinerator, and there is a clear synergistic relationship between the two: When the furnace temperature is within a reasonable range, the oxidation reaction inside the incinerator is sufficient, and the tail gas treatment capacity is relatively high; if the furnace temperature is lower than the preset reasonable range, the oxidation reaction rate decreases, and too much tail gas entering will lead to incomplete combustion, so the treatment load needs to be reduced; if the furnace temperature is higher than the preset reasonable range, the heat load inside the furnace is too high, which can easily damage the furnace structure, so the treatment load also needs to be reduced; when the furnace negative pressure is within a reasonable range, the airflow inside the furnace is smooth, and the tail gas input can be stably received; if the negative pressure is too high, a large amount of outside air will infiltrate, which will dilute the tail gas concentration and reduce the combustion efficiency, so the tail gas treatment capacity needs to be appropriately increased to ensure the combustion effect; if the negative pressure is too low, the tail gas discharge is obstructed, and it is easy to accumulate inside the furnace, so the tail gas treatment capacity needs to be reduced. The system is designed to maintain stability within the furnace. First, the rated processing load of the incinerator is determined, representing its maximum tail gas processing capacity under standard operating conditions. Then, the deviations of the real-time furnace temperature and furnace negative pressure from their respective preset reasonable ranges are calculated. Based on the degree of deviation, corresponding load adjustment coefficients are set; the larger the deviation, the greater the correction to the rated processing load. Specifically, when the furnace temperature deviates from the reasonable range, the adjustment coefficient is used to reduce the rated processing load; when the furnace negative pressure deviates from the reasonable range, the adjustment coefficient is set according to the direction of deviation, thus appropriately increasing or decreasing the rated processing load. Finally, the rated processing load and the two adjustment coefficients are used to collaboratively correct the system, obtaining the maximum tail gas processing load that the incinerator can currently withstand. This load serves as the basis for calculating the subsequent acceptable tail gas flow rate threshold, ensuring that the tail gas delivery volume does not exceed the incinerator's actual processing capacity, thus avoiding incomplete combustion or furnace damage. Step S23: Based on the initial oxygen content of the oxygen-enriched air, the real-time oxygen content of the acid production tail gas, and the SO2 concentration requirement parameters of the conversion process, calculate the target oxygen content range after mixing the oxygen-enriched air and the acid production tail gas. The oxygen content of the mixed gas directly affects the tail gas combustion effect and the stability of the conversion process: if the oxygen content is too low, components such as VOCs and H2S in the tail gas cannot be completely oxidized and decomposed, resulting in substandard tail gas emissions, and the SO2 concentration generated does not meet the conversion requirements; if the oxygen content is too high, it will increase the consumption of oxygen-enriched air, increase operating costs, and excess oxygen will react with SO2, affecting subsequent conversion efficiency. The initial oxygen content of the oxygen-enriched air is the basic oxygen content before mixing, and the real-time oxygen content of the acid production tail gas is the weighted average oxygen content obtained by summarizing and merging. The two together determine the initial range of the mixed gas oxygen content. The SO2 concentration requirement parameters of the conversion process constrain the mixed oxygen content because the amount of SO2 generated is related to the oxygen content. Too high or too low oxygen content will... This can lead to SO2 concentration deviating from the required value. To address this, we first determine the initial range of oxygen content in the mixed gas based on the initial oxygen content of the oxygen-enriched air and the real-time oxygen content of the acidification tail gas, combined with their flow ratio trends during the mixing process. This initial range covers a reasonable range between the individual oxygen contents of the two gases, ensuring that the initial range closely matches the mixing characteristics of the two gases. Then, using the SO2 concentration requirement parameter of the conversion process as a constraint, we analyze the correlation between oxygen content and SO2 generation to determine the oxygen content constraint range that allows the SO2 concentration to meet the requirement parameter. Finally, we perform an intersection screening between the initial range and the constraint range, eliminating oxygen content values ​​exceeding the constraint range. Simultaneously, considering the basic requirements of the acidification process for the oxygen content of the incinerated gas, we fine-tune the screened range to ultimately determine the target oxygen content range after mixing. This range serves as the basis for calculating the subsequent target oxygen content ratio threshold, ensuring that the oxygen content of the mixed gas meets both the requirements for complete combustion and the SO2 concentration requirements of the conversion process. Step S24: Based on the calculated maximum tail gas treatment load and target oxygen content range, calculate the acceptable tail gas flow rate threshold and the target oxygen content ratio threshold respectively. The acceptable tail gas flow rate threshold can be calculated by using the maximum tail gas treatment load as a baseline value, combined with the real-time component concentration of the acid production tail gas, and setting corresponding concentration correction coefficients for different components. The higher the concentration of combustible and toxic components such as VOCs and H2S, the smaller the correction coefficient, used to appropriately lower the baseline value. The maximum tail gas treatment load and concentration correction coefficient are collaboratively corrected. Simultaneously, considering the continuous operation requirements of on-site acid production, a reasonable safety redundancy is set to finally determine the acceptable tail gas flow rate threshold. This ensures that the threshold does not exceed the maximum tail gas treatment load, while also taking into account the impact of tail gas component concentration on the incineration effect. For example, when the concentration of VOCs and H2S in the tail gas is high, the acceptable tail gas flow rate threshold is appropriately lowered. This ensures thorough combustion; the acceptable tail gas flow rate threshold provides a basis for generating initial delivery instructions, preventing tail gas delivery from exceeding the incinerator's processing capacity; the specific target oxygen content ratio threshold can be determined by using the target oxygen content range after mixing as a constraint, combined with the initial oxygen content of oxygen-enriched air and the real-time oxygen content of acid-producing tail gas, first calculating the deviation between the individual oxygen content of the two gases and the target oxygen content range, and determining the direction of flow ratio adjustment for the two gases based on the deviation; then, based on the flow ratio adjustment direction and combined with the oxygen content characteristics of the two gases, deriving the range of flow ratios of oxygen-enriched air and acid-producing tail gas that allows the mixed oxygen content to fall within the target range, while eliminating ratio values ​​that exceed the allowable range of actual production operation, and finally determining the target oxygen content ratio threshold; this ratio threshold provides a basis for the linkage adjustment of the oxygen-enriched air intake and tail gas delivery flow, achieving dynamic adaptation between the two and maintaining a stable oxygen content in the mixed gas.

[0026] In this embodiment, by selecting key correlation parameters between the incinerator and the conversion process, and utilizing the inherent synergistic relationship between the parameters, the maximum tail gas treatment load and the target oxygen content range are calculated respectively, thereby obtaining the acceptable tail gas flow rate threshold and the target oxygen content ratio threshold. This ensures that the tail gas delivery volume is matched with the incinerator's processing capacity, avoiding incomplete combustion or furnace overload; at the same time, it ensures that the oxygen content of the mixed gas meets the requirements of the incineration and conversion processes, guaranteeing the stable operation of the conversion process.

[0027] In a specific implementation, as one example, existing acid production tail gas treatment processes typically employ an independent control strategy when sending tail gas into the incinerator: that is, the frequency of the booster fan is preset to fix the tail gas flow rate, and the opening of the oxygen-enriched air valve is adjusted separately to maintain the oxygen content, or the oxygen-enriched air volume is adjusted linearly proportionally based solely on changes in tail gas flow rate. Due to the aforementioned issues, this decoupled or open-loop control method cannot cope with the nonlinear interference caused by high-frequency fluctuations in the concentrations of reducing components such as H2S and organic sulfur in the acid production tail gas. When the combustible components in the tail gas suddenly increase, increasing the oxygen-enriched air only can easily lead to a surge in the total volumetric flow rate of the mixed gas, causing pressure fluctuations in the incinerator furnace or even flame ejection; decreasing the tail gas flow rate may cause a sharp drop in the incinerator's heat load, affecting furnace temperature stability and subsequent SO2 concentration indicators. This embodiment uses the measured oxygen content deviation of the mixed gas as a single driving source, simultaneously calculating and executing bidirectional coordinated adjustment of the oxygen-enriched air intake and the acid production tail gas delivery flow rate to ensure compliant tail gas delivery and stable mixed oxygen content. The specific implementation steps are as follows: Step S31: Receive the calculated acceptable exhaust gas flow rate threshold and directly map this threshold to the reference operating frequency signal of the booster inverter motor; for example, when the acceptable exhaust gas flow rate threshold corresponds to 80% of the rated capacity of the fan, output a 40Hz reference frequency command corresponding to the 50Hz power frequency to the booster inverter; at the same time, place the oxygen-enriched air pipeline intake regulating valve at the static pre-opening position calculated based on the initial oxygen content and theoretical stoichiometry of the oxygen-enriched air; this can establish an initial operating point that meets both the maximum processing load limit and the initial oxygen balance condition, avoiding airflow impact caused by excessive actuator movement at startup; Step S32: The measured oxygen content of the mixed gas is obtained in real time by a high-temperature zirconia oxygen analyzer installed downstream of the oxygen-enriched air pipeline mixing section. The measured oxygen content is compared with the target oxygen content ratio threshold in real time to calculate the instantaneous deviation value. The deviation value is input into the dead zone judgment logic. Only when the absolute value of the deviation exceeds the preset allowable deviation range is it determined as a valid adjustment signal and the linkage program is triggered. If the deviation is within the range, the current state of the actuator remains unchanged, thereby filtering out invalid actions caused by sensor noise and small fluctuations. Step S33: When the adjustment program is triggered, a two-way coordination mechanism is activated based on the direction of deviation; if the measured oxygen content is lower than the target lower limit, it indicates that the reducing component is excessive or the oxidant is insufficient, and two operations are executed simultaneously: a. Linearly increase the opening of the oxygen-enriched air intake regulating valve according to the first adjustment slope to quickly replenish the oxidant; b. Linearly reduce the operating frequency of the booster fan according to the second adjustment slope to reduce the amount of high-concentration exhaust gas entering; The second adjustment slope is set to be less than the first adjustment slope to ensure that the total flow rate of the mixed gas does not drop precipitously while increasing the oxygen content, thus maintaining stable pipeline pressure. Conversely, if the measured oxygen content is higher than the target upper limit, the operation of reducing the opening of the oxygen-enriched air valve and increasing the frequency of the fan will be performed simultaneously. During this process, the upper limit of the fan frequency adjustment is locked at the base frequency value to prevent excessive exhaust gas delivery; the lower limit of the oxygen-enriched air valve adjustment is locked at a safe opening to ensure the minimum flow rate in the pipeline, to prevent the valve from closing too tightly and causing pressure buildup. Step S34: During the adjustment process, continuously monitor the rate of change of the deviation value. If the rate at which the measured oxygen content returns to the target range is lower than the preset threshold in multiple consecutive sampling cycles, it indicates that there is a large lag or interference. Introduce a dynamic gain coefficient to increase the single-step adjustment range of the valve opening and the fan frequency. For example, increase the fan frequency adjustment step size from the usual 0.5Hz / time to 1.0Hz / time, and the valve opening adjustment step size from 1% to 2%, until the measured oxygen content falls into the preset allowable deviation range. Once the measured value returns to the range, immediately freeze the current valve opening and fan frequency parameters, enter the hold state, and wait for the next deviation exceeding the tolerance event. Step S35: During the adjustment process, continuously monitor the static pressure of the oxygen-enriched air pipeline and the negative pressure of the exhaust gas pipeline; if it is detected that the pipeline pressure rises above the preset safety threshold due to the rapid closing of the valve, the valve closing action is forcibly suspended, and the fan frequency is adjusted in reverse first to release pressure. After the pressure drops, the oxygen content adjustment logic is restored; if it is detected that the negative pressure of the exhaust gas pipeline is too high due to the fan frequency being too low, posing a risk of drawing in outside air, the fan frequency is increased first, temporarily sacrificing the oxygen content control accuracy to ensure the system's airtightness and ensure that the physical safety of the equipment is always better than the optimization of process indicators.

[0028] In this embodiment, by using the deviation of oxygen content in the mixed gas as a feedback variable to directly drive the synchronous reverse or same-direction change of the fan frequency and valve opening, a dynamic balance between stoichiometry and thermal load can be achieved. By utilizing the coupling effect of adjusting the total exhaust gas volume by fan frequency and adjusting the oxygen concentration by valve opening, the oxygen-fuel ratio required for combustion can be reconstructed within seconds when the exhaust gas composition fluctuates drastically. This not only prevents toxic components such as H2S from penetrating the incinerator due to oxygen deficiency, eliminating the risk of odor emission and explosion, but also prevents SO2 concentration dilution due to excessive oxygen enrichment, ensuring the activity stability and conversion efficiency of the catalyst in subsequent conversion processes. At the same time, through the pressure priority arbitration mechanism, pipeline overpressure or negative pressure leakage accidents caused by excessively rapid adjustment can be prevented, realizing fully automatic and highly reliable operation of the acid production exhaust gas resource utilization process.

[0029] In a specific implementation, as one example, during the process of transporting acid production tail gas to the incinerator, traditional control logic often only initiates the switching procedure after detecting a fault signal in the incinerator. At this time, the tail gas has already accumulated or dissipated in the pipeline, and the sudden change in the frequency of the booster fan at the moment of switching can easily cause the downstream VOCs treatment system to operate under overload, resulting in flooding or penetration of the alkaline washing and acid washing tower liquids. This embodiment breaks down the switching action into four stages: state prediction, load matching, non-disruptive execution, and process synchronization. By introducing the real-time acceptance capability of the VOCs treatment system as a feedforward variable, the regulation logic of the booster fan is reconstructed. The specific implementation steps are as follows: Step S41: During the acid production tail gas transportation process, continuously monitor the operating status of the incinerator and collect corresponding monitoring parameters; the operating status parameters of the incinerator are selected as the monitoring objects because the operating status of the incinerator directly determines whether it can normally treat the acid production tail gas. When the operating status is abnormal, the tail gas transportation path must be switched immediately to avoid tail gas treatment failure; the monitoring parameters include the incinerator operating command, real-time furnace temperature, oxygen-enriched air supply status and SO2 concentration in the conversion process. The above parameters correspond to different abnormal operating conditions, covering the core influencing factors for normal operation of the incinerator; among them, the incinerator operating command is directly output by the incinerator control system; Step S42: Preset interlocking switching trigger conditions, and perform real-time judgment on the collected monitoring parameters to identify whether the trigger conditions are met; the preset interlocking switching trigger conditions include: a. The incinerator triggers a planned shutdown and maintenance command: At this time, the incinerator needs to stop operating, cannot process the exhaust gas, and the conveying path needs to be switched; b. The incinerator temperature is consistently below the preset minimum incineration temperature threshold: The low furnace temperature prevents VOCs from being completely oxidized and decomposed, resulting in substandard exhaust gas treatment. The transport path needs to be switched. c. Interruption of oxygen-enriched air supply to the incinerator: Without oxygen, the exhaust gas cannot be incinerated and the delivery path needs to be switched. d. The SO2 concentration in the conversion process continues to exceed the preset process threshold: This indicates that the amount of SO2 generated after incineration does not meet the conversion requirements, and it is necessary to stop supplying exhaust gas to the incinerator and switch the supply path. The judgment method is to compare the collected parameters with preset conditions in real time: the trigger condition is met when the incinerator is ordered to stop for maintenance; the trigger condition is met when multiple sets of real-time furnace temperature data are continuously collected and are all lower than the preset minimum incineration temperature threshold; the supply interruption is determined when the flow rate and pressure of the oxygen-enriched air pipeline are continuously zero; the trigger condition is met when multiple sets of SO2 concentration data collected in the conversion process are continuously collected and are all higher than the preset process threshold; if any one of the conditions is met, it is determined that the interlock switching needs to be initiated. Step S43: When the preset interlocking switching trigger condition is detected, a switching delivery command is generated to cut off the delivery path of acid production tail gas to the incinerator. The purpose is to quickly terminate the delivery of tail gas to the abnormal incinerator and avoid tail gas waste, treatment failure, or equipment damage. The switching delivery command includes a cut-off command and a switching preparation command. The cut-off command is sent to the emergency cut-off valve of the delivery pipeline from the acid production tail gas to the incinerator to control the valve to close and completely cut off the delivery path to prevent tail gas from continuing to enter the incinerator. The switching preparation command is sent to the booster fan and VOCs treatment system to inform the equipment that the switching process is about to start and to prepare for operation. After the command is generated, the command execution status is fed back in real time to confirm that the emergency cut-off valve is completely closed and to ensure that the delivery path is completely cut off and there is no tail gas leakage. Step S44: According to the switching delivery command, control the booster fan to switch the delivery of acid production tail gas to the VOCs treatment system, and simultaneously obtain the real-time operating load of the VOCs treatment system; the booster fan is the power equipment for tail gas delivery, and its operating status needs to be adjusted during the switching delivery to ensure that the tail gas is delivered smoothly to the VOCs treatment system; the control method is to send a command to the booster fan to adjust the fan operating frequency, and initially adjust the tail gas delivery flow rate to the normal acceptance range of the VOCs treatment system to avoid equipment impact caused by sudden changes in flow rate; Step S45: Based on the real-time operating load of the VOCs treatment system, dynamically adjust the operating frequency of the booster fan to control the flow rate of the acid production tail gas to not exceed the maximum accepting load of the VOCs treatment system. The adjustment method is to compare the collected real-time operating load with the maximum accepting load. If the real-time operating load is low, appropriately increase the operating frequency of the booster fan to increase the tail gas flow rate and make full use of the treatment capacity. If the real-time operating load is close to the maximum accepting load, decrease the operating frequency of the booster fan to reduce the tail gas flow rate and ensure that the flow rate does not exceed the maximum accepting load. Step S46: Simultaneously activate the corresponding treatment processes of the alkaline scrubbing tower, acid scrubbing tower, and water scrubbing tower of the VOCs treatment system to complete the backup path treatment of the acid production tail gas. The alkaline scrubbing tower, acid scrubbing tower, and water scrubbing tower of the VOCs treatment system each undertake different treatment functions. The alkaline scrubbing tower is used to remove acidic components in the tail gas, the acid scrubbing tower is used to further purify the tail gas, and the water scrubbing tower is used to remove dust and soluble impurities in the tail gas. Only by working together can the tail gas meet the emission standards. The activation method is to send a start command to the inlet valve and circulation pump of the three towers to ensure that the three towers start synchronously. The inlet flow rate and circulation speed are adjusted to the normal treatment state and adapted to the tail gas delivery flow rate.

[0030] In this embodiment, by continuously monitoring the core operating parameters of the incinerator, the interlocking switching trigger conditions are accurately identified; through clear switching instructions and procedures, the exhaust gas is quickly switched from the incinerator to the VOCs treatment system; by dynamically adjusting the frequency of the booster fan and synchronously starting the VOCs treatment process, the exhaust gas delivery is ensured to be compliant and the treatment meets standards; this embodiment can promptly identify abnormal operating conditions of the incinerator, avoiding ineffective exhaust gas delivery and equipment damage; the flow rate is stable during the switching process and does not exceed the acceptance capacity of the VOCs treatment system; the VOCs treatment process is started synchronously to ensure that the exhaust gas is discharged in compliance with standards and avoids environmental pollution.

[0031] In practical implementation, as one example, existing protection mechanisms for transporting acid production tail gas to the incinerator mostly rely on static threshold alarms for a single parameter. For example, interlocking is only triggered when the pipeline pressure exceeds a fixed value or the furnace temperature falls below a set value. This delayed judgment logic cannot effectively address the risk of backfire caused by sudden reverse changes in negative pressure inside the furnace, nor can it intervene in the early stages of a rapid increase in pipeline pressure. This can easily lead to high-temperature flue gas flowing back into the tail gas pipeline, causing physical rupture or flammable gas accumulation and explosion. Based on the above problems, this embodiment achieves emergency cut-off protection through dynamic trend analysis of multi-source heterogeneous data, combined with a dual-valve cutoff and intermediate venting execution strategy. The specific implementation steps are as follows: Step S51: Throughout the entire acid production tail gas transportation process, continuously monitor the pressure parameters of the transportation pipeline and the incinerator's internal operating parameters, and collect the corresponding monitoring parameters. The pressure parameters of the transportation pipeline and the incinerator's internal operating parameters directly reflect the safety status of the acid production tail gas transportation process. Abnormal parameters are directly related to safety risks and must be collected in real time to ensure safety. The monitoring parameters include the pressure parameters in the transportation pipeline, the incinerator's emergency shutdown command, the incinerator's internal negative pressure parameters, and the combustible gas concentration parameters in the transportation pipeline. Among them, the pressure parameters in the transportation pipeline reflect the stability of pipeline operation. Abnormal pressure can easily lead to pipeline damage and tail gas leakage. These parameters can be collected by pressure sensors along the pipeline, with the sensors evenly distributed. At critical pipeline nodes, such as inlets, outlets, and bends, ensure that the collected data comprehensively reflects the pipeline pressure status; the incinerator emergency shutdown command is directly output by the incinerator control system, directly indicating a sudden fault in the incinerator, requiring immediate termination of tail gas delivery; the negative pressure parameter inside the furnace is collected by the incinerator pressure sensor, reflecting the airflow balance inside the incinerator, and sudden reversals in negative pressure can easily lead to tail gas backflow and accumulation; the combustible gas concentration parameter is collected by the combustible gas sensor in the delivery pipeline, with the sensor placed at weak points in the pipeline's airtightness and locations where gas easily accumulates, directly related to safety risks such as explosions and poisoning, requiring real-time monitoring; the collection frequency is consistent with step S1 to ensure the real-time nature and accuracy of parameter collection; Step S52: Preset interlocking shutdown trigger conditions and clarify the judgment criteria for each condition to identify abnormal operating conditions. The preset interlocking shutdown trigger conditions are set around the safety risks of the conveying process. Each condition corresponds to a clear safety hazard, and the judgment criteria are in line with actual production to ensure accurate triggering timing and no misjudgment. The trigger conditions and judgment criteria are as follows: a. The incinerator triggers an emergency shutdown command: The judgment criterion is receiving an emergency shutdown signal sent by the incinerator control system. This signal directly indicates that the incinerator has experienced a sudden malfunction and cannot continue to operate, and the exhaust gas supply must be cut off immediately. b. The pressure in the delivery pipeline continuously exceeds the preset safety pressure threshold. The preset safety pressure threshold is set in combination with the design pressure bearing capacity of the delivery pipeline and the normal pressure range of acid tail gas delivery. The judgment criterion is that multiple sets of pipeline pressure data are continuously collected, all of which exceed the preset threshold and the duration reaches the preset duration, so as to avoid false triggering caused by instantaneous pressure fluctuations. c. A sudden reverse change in the negative pressure inside the furnace is judged by the fact that the negative pressure parameter inside the furnace changes from a negative value to a positive value rapidly, and the magnitude of the change exceeds the preset fluctuation range. This indicates that there is a risk of backflow in the airflow inside the furnace, and the tail gas supply must be cut off immediately. d. If the concentration of combustible gas in the delivery pipeline exceeds the preset safety threshold, the preset safety threshold is set in combination with the explosion limit of combustible gas and safety production specifications. The judgment standard is that the concentration data collected by the combustible gas sensor continues to exceed the threshold, indicating that there is a risk of combustible gas accumulation and explosion. Delivery must be terminated immediately and the exhaust gas isolated. Each condition is determined independently; if any one condition is met, it is determined that the interlocking parking protection needs to be activated. Step S53: Real-time judgment of the collected monitoring parameters to identify whether the preset interlocking stop trigger conditions are met; the judgment method is to compare the collected data of each monitoring parameter with the preset interlocking stop trigger conditions and judgment criteria one by one; during the judgment process, the parameter changes and judgment results are recorded in real time for fault diagnosis. Step S54: When the preset interlocking shutdown trigger condition is detected, the emergency cut-off protection mechanism is triggered, and an emergency cut-off command is generated. The emergency cut-off command is clear and has the highest execution priority to ensure that all types of execution equipment respond quickly. It includes: emergency cut-off valve closing command at the inlet of the conveying pipeline, emergency cut-off valve closing command at the outlet of the conveying pipeline, and booster fan shutdown command. Among them, the inlet and outlet emergency cut-off valve closing command is used to quickly isolate the exhaust gas in the pipeline, and the booster fan shutdown command is used to terminate the exhaust gas conveying power to prevent the continued conveying of exhaust gas into the pipeline. Step S55: According to the emergency shut-off command, simultaneously close the inlet and outlet emergency shut-off valves of the acid production tail gas transmission pipeline, control the booster fan to stop, and complete the safe isolation treatment of the acid production tail gas; after the valve is closed, collect the valve closing status through the valve status sensor to confirm that the valve is completely closed and there is no leakage; after the isolation is completed, continuously monitor the pressure and combustible gas concentration parameters in the transmission pipeline to keep track of the isolation status in real time until the safety hazard is eliminated and the fault is handled, in order to prepare for the resumption of transmission.

[0032] In this embodiment, by continuously monitoring the core safety parameters of the delivery pipeline and the incinerator, the interlocking shutdown trigger conditions are accurately identified; through clear triggering standards and rapid emergency cut-off commands, the protection mechanism is activated in a timely manner when abnormal operating conditions occur; by simultaneously closing the inlet and outlet emergency cut-off valves and performing shutdown operations, exhaust gas safety isolation is achieved; this embodiment forms a complete safety protection logic chain of monitoring, judgment, triggering, and isolation, which can promptly identify various abnormal safety operating conditions, quickly trigger emergency protection, achieve complete exhaust gas isolation, and prevent safety accidents such as exhaust gas leakage, equipment damage, and combustible gas explosions and poisoning.

[0033] Based on the same inventive concept as the acid production tail gas treatment flow regulation method in the foregoing embodiments, the present invention also provides an acid production tail gas treatment flow regulation system, such as... Figure 2 As shown, the system includes: The data acquisition module is used to collect real-time tail gas parameters from multiple tail gas sources in the acid production process, real-time operating condition parameters of the incinerator, and real-time operating status parameters of the VOCs treatment system. The threshold calculation module is used to calculate the acceptable exhaust gas flow rate threshold and the target oxygen content ratio threshold of the oxygen-enriched air pipeline of the incinerator based on the real-time operating parameters of the incinerator. The delivery control module is used to generate an initial delivery command for the acid production tail gas based on the acceptable tail gas flow rate threshold, control the booster fan to deliver the acid production tail gas to the oxygen-enriched air pipeline of the incinerator, and simultaneously adjust the oxygen-enriched air intake and the delivery flow rate of the acid production tail gas in real time according to the target oxygen content ratio threshold. The interlocking switching module is used to continuously monitor the operating status of the incinerator during the transportation of acid production tail gas. When it is detected that the incinerator meets the preset interlocking switching trigger conditions, a switching transportation command is generated to cut off the transportation path of acid production tail gas to the incinerator and control the booster fan to switch the acid production tail gas to the VOCs treatment system. The safety protection module is used to monitor the pressure parameters of the conveying pipeline and the furnace operating parameters of the incinerator in real time during the entire process of acid production tail gas transportation. When the preset interlock shutdown trigger condition is detected, the emergency cut-off protection mechanism is triggered, and the inlet and outlet emergency shut-off valves of the acid production tail gas conveying pipeline are closed simultaneously to complete the safe isolation treatment of acid production tail gas.

[0034] The system described above in this invention can effectively realize a method for adjusting the flow rate of acid production tail gas, and the technical effects it can achieve are as described in the above embodiments, which will not be repeated here.

[0035] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined herein, and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Thus, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. A method for regulating the flow of a sour tail gas treatment, characterized in that, include: Real-time data collection of exhaust gas parameters from multiple exhaust gas sources in the acid production process, real-time operating parameters of the incinerator, and real-time operating status parameters of the VOCs treatment system. Based on the real-time operating parameters of the incinerator, calculate the acceptable exhaust gas flow rate threshold and the target oxygen content ratio threshold of the oxygen-enriched air pipeline of the incinerator. Based on the acceptable tail gas flow rate threshold, an initial delivery command for acid production tail gas is generated, and the booster fan is controlled to deliver the acid production tail gas to the oxygen-enriched air pipeline of the incinerator. At the same time, according to the target oxygen content ratio threshold, the oxygen-enriched air intake and the delivery flow rate of acid production tail gas are adjusted in real time. During the transportation of acid production tail gas, the operating status of the incinerator is continuously monitored. When the incinerator is found to meet the preset interlocking switching trigger conditions, a switching transportation command is generated to cut off the transportation path of acid production tail gas to the incinerator and control the booster fan to switch the acid production tail gas to the VOCs treatment system. Throughout the entire process of transporting acid tail gas, the pressure parameters of the transport pipeline and the incinerator's internal operating parameters are monitored in real time. When the preset interlocking shutdown trigger condition is detected, the emergency cut-off protection mechanism is triggered, and the inlet and outlet emergency shut-off valves of the acid tail gas transport pipeline are closed simultaneously to complete the safe isolation treatment of the acid tail gas.

2. The method for adjusting the flow rate of acid production tail gas according to claim 1, characterized in that, The real-time acquisition of real-time exhaust gas parameters from multiple exhaust gas sources in the acid production process includes: Sensors were placed at the tail gas outlets of the slurry tank, centrifuge, thickening tower, and condensation tower to collect tail gas flow rate, VOCs concentration, H2S concentration, organic sulfur concentration, oxygen content, temperature, and pressure for each tail gas source. The exhaust gas parameters of each exhaust gas source are summarized and merged to obtain the real-time exhaust gas parameters of the acid production exhaust gas.

3. The method for adjusting the flow rate of acid production tail gas according to claim 2, characterized in that, Before aggregating and integrating the exhaust gas parameters from each exhaust gas source, data verification is also included: Determine whether the exhaust gas parameters collected from each exhaust gas source are within the preset conventional process range; If any parameter exceeds the preset range of the conventional process, the corresponding sensor will be controlled to perform instantaneous resampling. If the parameters after resampling are still outside the preset normal process range, a sensor anomaly alert will be triggered and the data set will be removed. Only parameters that pass verification or re-sampling will be used for subsequent aggregation and fusion calculations.

4. The method for adjusting the flow rate of acid production tail gas according to claim 2, characterized in that, The calculation of the acceptable exhaust gas flow rate threshold and the target oxygen content ratio threshold for the oxygen-enriched air duct of the incinerator based on the real-time operating parameters of the incinerator includes: Obtain real-time furnace temperature, furnace negative pressure, initial oxygen content of oxygen-enriched air, and SO2 concentration requirements for the conversion process of the incinerator; Based on the real-time furnace temperature and furnace negative pressure, the maximum exhaust gas treatment load of the incinerator is calculated. Based on the initial oxygen content of the oxygen-enriched air, the real-time oxygen content of the acid production tail gas, and the SO2 concentration requirement parameters of the conversion process, the target oxygen content range after mixing the oxygen-enriched air and the acid production tail gas is calculated. Based on the maximum exhaust gas treatment load and the target oxygen content range, the acceptable exhaust gas flow rate threshold and the target oxygen content ratio threshold are calculated respectively.

5. The method for adjusting the flow rate of acid production tail gas according to claim 4, characterized in that, The step of adjusting the oxygen-enriched air intake and the acid production tail gas delivery flow rate in real time according to the target oxygen content ratio threshold includes: Real-time acquisition of measured oxygen content in the mixed gas inside the oxygen-enriched air pipeline; Calculate the deviation between the measured oxygen content and the target oxygen content ratio threshold; When the deviation value exceeds the preset allowable deviation range, the deviation value is used as the closed-loop adjustment input to synchronously adjust the opening of the intake regulating valve of the oxygen-enriched air pipeline and the operating frequency of the booster fan until the measured oxygen content falls back to the preset allowable deviation range.

6. The method for adjusting the flow rate of acid production tail gas according to claim 5, characterized in that, The preset interlocking switching trigger conditions include: the incinerator triggers a planned shutdown and maintenance command, the incinerator temperature remains below the preset minimum incineration temperature threshold, the oxygen-enriched air supply to the incinerator is interrupted, or the SO2 concentration in the conversion process remains above the preset process threshold.

7. The method for adjusting the flow rate of acid production tail gas according to claim 6, characterized in that, The control booster fan switches the acid production tail gas to the VOCs treatment system, including: During the switching process, the operating frequency of the booster fan is dynamically adjusted according to the real-time operating load of the VOCs treatment system to control the flow rate of the acid production tail gas to not exceed the maximum capacity of the VOCs treatment system. The corresponding treatment processes of the alkaline scrubbing tower, acid scrubbing tower, and water scrubbing tower of the VOCs treatment system are simultaneously activated to complete the backup path treatment of the acid production tail gas.

8. The method for adjusting the flow rate of acid production tail gas according to claim 5, characterized in that, The preset interlock shutdown triggering conditions include: the incinerator triggers an emergency shutdown command, the pressure in the delivery pipeline continuously exceeds the preset safety pressure threshold, the negative pressure in the furnace undergoes a reverse change, or the concentration of combustible gas in the delivery pipeline is detected to exceed the preset safety threshold.

9. The method for adjusting the flow rate of acid production tail gas according to claim 4, characterized in that, The synchronous adjustment of the intake regulating valve opening of the oxygen-enriched air pipeline and the operating frequency of the booster fan includes: When the measured oxygen content is lower than the lower limit of the target oxygen content ratio threshold, the opening of the intake regulating valve is linearly increased according to the first regulating slope, and the operating frequency of the booster fan is linearly decreased according to the second regulating slope, wherein the value of the second regulating slope is less than the first regulating slope. When the measured oxygen content is higher than the upper limit of the target oxygen content ratio threshold, the opening of the intake regulating valve is reduced and the operating frequency of the booster fan is increased, and the increased operating frequency of the booster fan does not exceed the reference operating frequency based on the acceptable exhaust gas flow rate threshold mapping.

10. A flow rate regulation system for treating acid production tail gas, characterized in that, include: The data acquisition module is used to collect real-time tail gas parameters from multiple tail gas sources in the acid production process, real-time operating condition parameters of the incinerator, and real-time operating status parameters of the VOCs treatment system. The threshold calculation module is used to calculate the acceptable exhaust gas flow rate threshold and the target oxygen content ratio threshold of the oxygen-enriched air pipeline of the incinerator based on the real-time operating parameters of the incinerator. The delivery control module is used to generate an initial delivery command for the acid production tail gas based on the acceptable tail gas flow rate threshold, control the booster fan to deliver the acid production tail gas to the oxygen-enriched air pipeline of the incinerator, and simultaneously adjust the oxygen-enriched air intake and the delivery flow rate of the acid production tail gas in real time according to the target oxygen content ratio threshold. The interlocking switching module is used to continuously monitor the operating status of the incinerator during the transportation of acid production tail gas. When it is detected that the incinerator meets the preset interlocking switching trigger conditions, a switching transportation command is generated to cut off the transportation path of acid production tail gas to the incinerator and control the booster fan to switch the acid production tail gas to the VOCs treatment system. The safety protection module is used to monitor the pressure parameters of the conveying pipeline and the furnace operating parameters of the incinerator in real time during the entire process of acid production tail gas transportation. When the preset interlock shutdown trigger condition is detected, the emergency cut-off protection mechanism is triggered, and the inlet and outlet emergency shut-off valves of the acid production tail gas conveying pipeline are closed simultaneously to complete the safe isolation treatment of acid production tail gas.

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