Integrated treatment method and system suitable for multi-component industrial waste gas

Abstract

The invention discloses an integrated treatment method and system suitable for multi-component industrial waste gas, and relates to the technical field of industrial waste gas treatment, and the method comprises the steps of S1, waste gas pretreatment, S2, pre-oxidation and sulfur fixation, S3, thermal oxidation, S4, non-quenching temperature self-adaptive adjustment, S5, selective catalytic reduction denitration, S6, emission and monitoring, and S7, intelligent dynamic system control. The gradient temperature field of the heat storage ceramic body is used for providing accurate and stable air inlet temperature for the SCR reaction, an independent quenching device is omitted, and therefore the comprehensive energy consumption and the operation cost of the system are greatly reduced, and by additionally arranging the pre-oxidation layer and adopting the dual-function SCR catalyst, the heat storage effect of the system is greatly improved. The system effectively realizes advanced fixation of organic sulfur and efficient removal of nitrogen oxides, dynamically adjusts the ammonia injection amount and combustion intensity, ensures that the system can still maintain extremely high treatment efficiency and stability under flow fluctuation and complex working conditions, reduces ammonia escape to the greatest extent, and is convenient to use.

Description

Technical Field

[0001] This invention relates to the field of industrial waste gas treatment technology, and in particular to an integrated treatment method and system for multi-component industrial waste gas. Background Technology

[0002] Multi-component industrial waste gas has a complex composition, often containing volatile organic compounds, sulfur oxides, nitrogen oxides, and particulate matter. Its treatment requires a combination of processes such as adsorption, catalytic combustion, and biological purification to achieve synergistic and efficient purification of multiple pollutants, which is both a key focus and a challenge in the field of environmental protection.

[0003] When treating multi-component industrial waste gas, the outlet waste gas temperature of the split-type RTO system varies widely, while the efficient reaction temperature range of SCR technology is relatively narrow. There is a significant difference between the two. In order to achieve temperature matching, additional cooling treatment is usually required for high-temperature waste gas, resulting in energy consumption. In addition, during the high-temperature oxidation process of RTO, nitrogen-containing organic compounds in the waste gas may be converted into nitrogen oxides, which significantly increases the denitrification load of the subsequent SCR unit. Furthermore, when the concentration of waste gas components changes rapidly, the existing system's reducing agent supply unit and combustion control unit exhibit response lag, which may cause problems such as excessive reducing agent residue or insufficient oxidation of organic matter, which is quite inconvenient. Summary of the Invention

[0004] The purpose of this invention is to provide a method and system for integrated treatment of multi-component industrial waste gas, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for integrated treatment of multi-component industrial waste gas, comprising the following steps:

[0006] S1: Waste gas pretreatment, which collects industrial waste gas containing VOCs and NOx through a gas collection system and passes it through a bag filter to remove dust and particulate matter.

[0007] S2: Pre-oxidation and sulfur fixation. The pre-treated waste gas is passed into a pre-oxidation reaction layer filled with MnO2-CeO2 catalyst, where sulfur-containing organic matter in the waste gas is catalytically oxidized to SO3 and then adsorbed and fixed on the catalyst surface to form sulfate.

[0008] S3: Thermal oxidation, the waste gas after step two is passed into a regenerative thermal oxidizer and an oxidation reaction is carried out at a temperature of 750-950℃ to decompose VOCs into CO2 and H2O, and at the same time oxidize nitrogen-containing organic matter to generate NOx;

[0009] S4: No rapid cooling temperature adaptive adjustment, the high temperature gas generated in step 3 is introduced into the final stage regenerator of RTO, and its temperature is reduced and homogenized to the optimal activity temperature window of SCR catalyst 300℃±20℃ through heat exchange.

[0010] S5: Selective catalytic reduction denitrification, which mixes the temperature-controlled waste gas with the injected reducing agent ammonia, and then allows the mixed gas to pass sequentially through the SO3 capture layer and the sulfur-resistant denitrification catalyst layer in the SCR reactor.

[0011] S6: Emissions and monitoring, the purified gas after step five is discharged through a chimney, and the NOx concentration and NH3 escape concentration in the emitted gas are monitored in real time;

[0012] S7: Intelligent dynamic control system, which monitors the VOCs composition and concentration of the RTO inlet exhaust gas in real time, and predicts the NOx concentration reaching the SCR inlet based on this data, and uses this as a feedforward to control the amount of ammonia injected. At the same time, based on the NOx concentration and NH3 escape concentration at the SCR outlet monitored in step six, it provides feedback to fine-tune the amount of ammonia injected and the combustion conditions of the RTO.

[0013] Preferably, step S1 includes the following steps:

[0014] S11: Waste gas collection, which effectively captures and collects industrial waste gas containing VOCs and NOx by installing gas collection hoods on production equipment and emission points;

[0015] S12: Exhaust gas transport: The collected exhaust gas is transported to the pretreatment and subsequent treatment units through a closed pipeline system using the power of a fan.

[0016] S13: Particulate matter removal, which allows the incoming exhaust gas to pass through a bag filter, using the filtration effect of the filter bags to intercept and remove dust, paint mist, flocculent solid particulate impurities contained in the exhaust gas.

[0017] Preferably, step S2 includes the following steps:

[0018] S21: Waste gas introduction, the waste gas that has been pretreated in step S1 and has had particulate matter removed is transported to the pre-oxidation reaction layer located at the front end of the RTO system inlet;

[0019] S22: Catalytic oxidation, which allows waste gas to pass through a reaction layer filled with MnO2-CeO2-based catalyst. Under the action of this catalyst, sulfur-containing organic matter in the waste gas undergoes selective catalytic oxidation and is converted into gaseous SO3.

[0020] S23: In-situ adsorption and fixation: Utilizing the adsorption characteristics of the catalyst layer itself, the SO3 generated in step S22 is immediately adsorbed onto the active sites on the catalyst surface.

[0021] S24: Sulfation, where the adsorbed SO3 further reacts with components on the catalyst surface and substances in the environment to generate stable sulfates, thus completing the removal of sulfur.

[0022] Preferably, step S3 includes the following steps:

[0023] S31: Waste gas introduction and preheating: The waste gas after pre-oxidation and sulfur fixation in step S2 is guided into a heat storage chamber of the RTO through a switching valve for heat exchange.

[0024] S32: High-temperature oxidation decomposition. The exhaust gas, after being fully preheated, enters the combustion chamber of the RTO, is heated to the set oxidation temperature, and remains there for a sufficient time.

[0025] S33: Potential NOx formation. Under high-temperature oxidation conditions, nitrogen-containing organic molecules in the exhaust gas are destroyed, and their nitrogen reacts with oxygen to form nitrogen oxides.

[0026] S34: Heat recovery and purification gas cooling. After the oxidation reaction is completed, the high-temperature purified gas leaves the combustion chamber and enters another heat storage chamber in a cooled state to continue heat exchange.

[0027] S35: Airflow switching. According to a preset time cycle, the flow path of the exhaust gas is changed through the switching valve, so that the heat storage chamber, which was originally a preheating chamber, becomes a cooling chamber for heat recovery, while the heat storage chamber, which was originally a cooling chamber, becomes a preheating chamber for preheating the newly entered exhaust gas.

[0028] Preferably, step S4 includes the following steps:

[0029] S41: High-temperature gas introduction, the high-temperature purified gas generated in step S3 is guided to its final stage heat storage chamber through the switching valve of the RTO system.

[0030] S42: Initial cooling and heat exchange. The high-temperature purified gas enters the final heat storage chamber and exchanges heat with the heat storage ceramic body with a relatively low indoor temperature.

[0031] S43: Fine temperature control in the extension section, the airflow continues to flow through the extension section of the heat storage ceramic body;

[0032] S44: Natural and gentle cooling. When the high-temperature airflow flows through the porous ceramic channel of the extension section, it exchanges heat with the ceramic body, which has a huge heat capacity and a specific temperature gradient.

[0033] S45: Airflow homogenization. During the process of flowing through the complex pore structure of the extension section, the airflow is simultaneously homogenized.

[0034] S46: Target temperature delivery. By precisely designing the parameters of the extension section, the temperature of the exhaust gas after the above heat exchange and homogenization process is precisely adjusted to the optimal activity temperature window of the SCR catalyst.

[0035] S47: The exhaust gas that has reached the target temperature is directly fed into the SCR reactor for further treatment through a channel that is directly connected by a physical structure.

[0036] Preferably, step S5 includes the following steps:

[0037] S51: Temperature-adaptive exhaust gas receiver, which receives exhaust gas whose temperature is precisely stabilized at 300℃±20℃ after being processed in step S4.

[0038] S52: Reducing agent metering and injection: The reducing agent is injected into the exhaust gas flow through a precisely metered ammonia injection grille.

[0039] S53: Ammonia gas is mixed with exhaust gas by using a mixer after the ammonia injection grid and by utilizing the turbulence effect in the pipeline to mix the injected ammonia gas with the exhaust gas.

[0040] S54: Final sulfur fixation protection, which allows the mixed gas to first pass through the SO3 capture layer in the SCR reactor for sulfur fixation;

[0041] S55: Selective catalytic reduction reaction. After passing through sulfur fixation protection, the gas then enters the sulfur-resistant denitrification catalyst layer to generate nitrogen and water.

[0042] S56: Purified gas output. The purified gas after the denitrification reaction is completed is discharged from the outlet of the SCR reactor.

[0043] Preferably, step S6 includes the following steps:

[0044] S61: Final purified gas delivery: The clean gas processed in step S5 is delivered to the chimney via an induced draft fan and with the help of the system pressure difference.

[0045] S62: Real-time sampling of key parameters. A small amount of flue gas sample is continuously and in real time extracted through the sampling probe of the online monitoring system in the flue before the flue gas enters the chimney, and then transported to the analysis instrument.

[0046] S63: NOx concentration analysis, using a NOx concentration analyzer to analyze the collected flue gas samples and measure the concentration of nitrogen oxides in them;

[0047] S44: NH3 escape concentration analysis, using an NH3 escape analyzer to analyze the same flue gas sample and measure the concentration of ammonia gas that escaped without participating in the reaction;

[0048] S65: Data acquisition and transmission. The analytical instrument converts the measured real-time concentration signal into a digital signal, collects it through the data acquisition system, and transmits it to the central control system.

[0049] S66: Compliance determination and emission. The control system compares real-time monitoring data with preset emission standard limits. After confirming that the pollutant concentration meets the emission regulations, the purified gas is discharged into the atmosphere through the chimney.

[0050] S67: Data recording and early warning. Continuously record all monitoring data to form a historical database for query and environmental inspection. When the monitoring value exceeds the set alarm threshold, the system immediately issues an audible and visual alarm signal to prompt the operator to intervene, check and adjust the process parameters.

[0051] Preferably, step S7 includes the following steps:

[0052] S71: Real-time monitoring of VOCs at the inlet, using an online VOCs component analyzer installed on the RTO inlet pipe to monitor the composition, concentration and fluctuation of the exhaust gas in real time and continuously, especially the types and concentrations of nitrogen-containing organic compounds;

[0053] S72: NOx generation prediction model calculation: Input the real-time VOCs data monitored in step S71 into the preset process mathematical model to calculate the estimated value of NOx concentration that will reach the inlet of the SCR reactor in about 30 seconds.

[0054] S73: Feedforward ammonia injection rate setting. Based on the estimated NOx concentration at the SCR inlet calculated in step S72, and according to the set denitrification efficiency target, the theoretical value of the required ammonia injection rate is calculated in advance through the feedforward control algorithm, and the ammonia injection flow rate of the ammonia injection grid is initially set accordingly.

[0055] S74: Real-time monitoring of the exit effect, receiving the final exit monitoring data from step S6 in real time, namely the actual NOx concentration and the actual NH3 escape concentration at the SCR exit;

[0056] S75: Feedback control calculation and fine-tuning, comparing the actual monitoring value at the outlet with the target set value;

[0057] S76: Control command execution, which sends the final control command, after feedforward-feedback integrated calculation, to the ammonia flow control valve and RTO combustion controller to execute precise actions;

[0058] S77: Self-learning and optimization. The advanced control system continuously records inlet data, control commands, and outlet results, and continuously optimizes the parameters in the process model through machine learning algorithms.

[0059] Preferably, the step S75, comparing the actual monitored value at the outlet with the target set value, specifically includes:

[0060] Fine-tuning ammonia injection rate: If the actual NOx concentration exceeds the standard but the NH3 escape does not exceed the standard, the ammonia injection rate is increased proportionally. If the NH3 escape concentration exceeds the standard, the ammonia injection rate is immediately reduced. Feedback control strategies such as PID control algorithm are used to make precise and small-scale dynamic corrections to the feedforward set ammonia injection rate in order to eliminate prediction deviations and system disturbances.

[0061] Adjusting RTO operating conditions: If the outlet NOx concentration remains abnormal and is correlated with VOCs data, the system can output reverse commands to fine-tune the temperature setting of the RTO combustion chamber and the fuel / air quantity of the afterburner, so as to optimize the VOCs destruction efficiency and indirectly control the amount of NOx generated.

[0062] The present invention also provides an integrated treatment system for multi-component industrial waste gas, comprising:

[0063] The waste gas collection and pretreatment module collects industrial waste gas containing VOCs and NOx through a gas collection system and then passes it through a bag filter to remove dust and particulate matter.

[0064] The pre-oxidation and sulfur fixation module introduces pre-treated waste gas into a pre-oxidation reaction layer filled with MnO2-CeO2 catalyst, catalytically oxidizing the sulfur-containing organic matter in the waste gas into SO3, which is then adsorbed and fixed on the catalyst surface to form sulfate.

[0065] The thermal oxidation module introduces the waste gas treated in step two into a regenerative thermal oxidizer, where an oxidation reaction is carried out at a temperature of 750–950°C, decomposing VOCs into CO2 and H2O, while simultaneously oxidizing nitrogen-containing organic matter to generate NOx.

[0066] Without a rapid cooling temperature adaptive adjustment module, the high-temperature purified gas generated in step three is introduced into the final stage regenerator of the RTO, and its temperature is reduced and homogenized to the optimal activity temperature window of the SCR catalyst, 300℃±20℃, through heat exchange.

[0067] The selective catalytic reduction denitrification module mixes the temperature-controlled exhaust gas with the injected reducing agent ammonia, and then passes the mixed gas sequentially through the SO3 capture layer and the sulfur-resistant denitrification catalyst layer in the SCR reactor.

[0068] The emission and monitoring module discharges the purified gas after step five through a chimney and monitors the NOx concentration and NH3 escape concentration in the emitted gas in real time.

[0069] The intelligent dynamic control module monitors the VOCs composition and concentration of the exhaust gas at the RTO inlet in real time, and predicts the NOx concentration reaching the SCR inlet based on this data. It then uses this data to feedback control the amount of ammonia injected. At the same time, based on the NOx concentration and NH3 escape concentration at the SCR outlet monitored in step six, it provides feedback to fine-tune the amount of ammonia injected and the combustion conditions of the RTO.

[0070] The technical effects and advantages of this invention are as follows:

[0071] (1) This invention utilizes a physical thermal coupling design to directly integrate the SCR reactor with the RTO final stage regenerator chamber. The gradient temperature field of the regenerator ceramic body provides a precise and stable inlet temperature for the SCR reaction, eliminating the need for a separate quenching device. This significantly reduces the overall energy consumption and operating cost of the system. Furthermore, by adding a pre-oxidation layer and using a dual-function SCR catalyst, a three-stage synergistic conversion mechanism of "pre-oxidation-adsorption-reduction" is constructed. This effectively achieves the early fixation of organic sulfur and the efficient removal of nitrogen oxides, blocking the formation path of ammonium bisulfate from the source, significantly extending the catalyst life and reducing maintenance costs. At the same time, based on the feedforward-feedback intelligent control system for predicting waste gas components, it can sense and respond to changes in waste gas concentration in advance, dynamically adjusting the ammonia injection rate and combustion intensity. This ensures that the system can maintain extremely high treatment efficiency and stability even under ±30% flow fluctuations and complex operating conditions, while minimizing ammonia escape.

[0072] (2) The integrated design of the present invention makes the process flow simpler and more compact, reduces the equipment footprint, initial investment and heat loss. The overall system has strong anti-interference ability, operational reliability and wide applicability, and is easy to use. Attached Figure Description

[0073] Figure 1 This is a flowchart of the integrated treatment method for multi-component industrial waste gas according to the present invention.

[0074] Figure 2 This is a flowchart illustrating the physical path of the waste gas treatment process in this invention. Detailed Implementation

[0075] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0076] This invention provides, for example Figures 1-2 The method shown is suitable for integrated treatment of multi-component industrial waste gas, including the following steps;

[0077] S1: Waste gas collection and pretreatment, collecting industrial waste gas containing VOCs and NOx through a gas collection system and passing it through a bag filter to remove dust and particulate matter;

[0078] S2: Pre-oxidation and sulfur fixation. The pre-treated waste gas is passed into a pre-oxidation reaction layer filled with MnO2-CeO2 catalyst. Here, the sulfur-containing organic matter in the waste gas is catalytically oxidized to SO3 and then adsorbed and fixed on the catalyst surface to form sulfate, realizing the migration of sulfur from the gas phase to the solid phase.

[0079] S3: Thermal oxidation, the waste gas after step two is passed into a regenerative thermal oxidizer (RTO) and an oxidation reaction is carried out at a temperature of 750-950℃ to completely decompose VOCs into CO2 and H2O, while oxidizing nitrogen-containing organic matter to generate NOx.

[0080] S4: No rapid cooling temperature adaptive adjustment. The high-temperature purified gas generated in step three is introduced into the final stage regenerator of the RTO. The final stage regenerator is directly connected to the SCR reactor through a physical structure. The regenerator ceramic body filled inside has an extension section extending to the inlet end of the SCR reactor. The high-temperature purified gas flows through the regenerator ceramic body extension section with a temperature gradient. Through heat exchange, its temperature is naturally and gradually reduced and homogenized to the optimal activity temperature window of the SCR catalyst, 300℃±20℃. The final stage regenerator of the RTO is physically coupled with the SCR reactor and the regenerator ceramic body extension section. The final stage regenerator of the RTO is directly connected to the shell of the SCR reactor through flange embedded welding to form a continuous sealed cavity, eliminating the need for traditional connecting pipes.

[0081] S5: Selective catalytic reduction denitrification, which mixes the temperature-controlled waste gas with the injected reducing agent ammonia, and then passes the mixed gas sequentially through the SO3 capture layer and the sulfur-resistant denitrification catalyst layer in the SCR reactor. The SO3 capture layer captures and fixes the residual SO3, while the sulfur-resistant denitrification catalyst layer catalyzes the reaction of NOx and NH3 to generate N2 and H2O under the sulfur poisoning environment.

[0082] S6: Emissions and monitoring, the purified gas after step five is discharged through a chimney, and the NOx concentration and NH3 escape concentration in the emitted gas are monitored in real time;

[0083] S7: Intelligent dynamic control, real-time monitoring of VOCs composition and concentration in RTO inlet exhaust gas, and prediction of NOx concentration reaching SCR inlet based on this data, and feedforward control of the amount of ammonia injected. At the same time, based on the NOx concentration and NH3 escape concentration at SCR outlet monitored in step six, the amount of ammonia injected and the combustion conditions of RTO are finely adjusted.

[0084] The above steps utilize a physical-thermal coupling design to directly integrate the SCR reactor with the final stage regenerator of the RTO. The gradient temperature field of the regenerator ceramic body provides a precise and stable inlet temperature for the SCR reaction, eliminating the need for a separate quenching device. This significantly reduces the system's overall energy consumption and operating costs. Furthermore, by adding a pre-oxidation layer and employing a bifunctional SCR catalyst, a three-stage synergistic conversion mechanism of "pre-oxidation-adsorption-reduction" is constructed. This effectively achieves the early fixation of organic sulfur and the efficient removal of nitrogen oxides, blocking the formation path of ammonium bisulfate at its source, significantly extending catalyst life and reducing maintenance costs. Simultaneously, a feedforward-feedback intelligent control system based on waste gas component prediction can detect and respond to changes in waste gas concentration in advance, dynamically adjusting the ammonia injection rate and combustion intensity. This ensures the system maintains extremely high treatment efficiency and stability even under ±30% flow fluctuations and complex operating conditions, while minimizing ammonia escape. The integrated design makes the process flow simpler and more compact, reducing equipment footprint, initial investment, and heat loss. The overall system possesses strong anti-interference capabilities, operational reliability, and wide applicability, making it easy to use.

[0085] Step S1 includes the following steps:

[0086] S11: Waste gas collection, which effectively captures and collects industrial waste gas containing VOCs and NOx by installing gas collection hoods on production equipment or emission points;

[0087] S12: Exhaust gas transport: The collected exhaust gas is transported to the pretreatment and subsequent treatment units through a closed pipeline system using the power of a fan.

[0088] S13: Particulate matter removal. The incoming exhaust gas passes through a bag filter, where the filter bags intercept and remove solid particulate impurities such as dust, paint mist, and flocculent matter from the exhaust gas. This provides a clean gas source for the subsequent catalytic oxidation unit and prevents equipment blockage and catalyst poisoning.

[0089] The above steps ensure that the exhaust gas does not escape through efficient collection and closed transportation, and the particulate matter is completely removed by the bag filter. This not only provides a clean and stable gas source for subsequent precision units such as RTO and SCR, but also effectively prevents catalyst poisoning, equipment blockage and system wear, significantly improving the overall treatment efficiency, operational stability and equipment lifespan.

[0090] Step S2 includes the following steps:

[0091] S21: Waste gas introduction, the waste gas that has been pretreated in step S1 and has had particulate matter removed is transported to the pre-oxidation reaction layer located at the front end of the RTO system inlet;

[0092] S22: Catalytic oxidation, which allows waste gas to pass through a reaction layer filled with MnO2-CeO2-based catalyst. Under the action of this catalyst, sulfur-containing organic compounds (such as thiols, thioethers, etc.) in the waste gas undergo selective catalytic oxidation and are converted into gaseous SO3.

[0093] S23: In-situ adsorption and fixation: Utilizing the adsorption characteristics of the catalyst layer itself, the SO3 generated in step S22 is immediately adsorbed onto the active sites on the catalyst surface.

[0094] S24: Sulfation. The adsorbed SO3 further reacts with components on the catalyst surface or substances in the environment to generate stable sulfates (such as manganese sulfate, cerium sulfate, etc.), thus being permanently fixed. The gas-solid phase migration is completed. Through the above continuous process of oxidation-adsorption-immobilization, the sulfur element is transferred from the gas phase of the waste gas to the solid phase of the catalyst, completing the removal of sulfur element and providing a low-sulfur environment for subsequent processes.

[0095] The above steps, through a continuous process of catalytic oxidation-adsorption-immobilization, efficiently convert sulfur-containing organic matter in the waste gas into stable sulfates and fix them in the catalyst. This fundamentally blocks sulfur from entering the subsequent RTO and SCR units, prevents catalyst sulfur poisoning, avoids the formation of ammonium bisulfate blockage, significantly extends the life of the main catalyst, and ensures the stable and efficient long-term operation of the entire system in a low-sulfur environment.

[0096] Step S3 includes the following steps:

[0097] S31: Waste gas introduction and preheating. The waste gas after pre-oxidation and sulfur fixation in step S2 is guided into a heat storage chamber (preheating chamber) of the RTO through a switching valve. When the waste gas flows through the high-temperature heat storage ceramic body in the chamber, it exchanges heat with it and absorbs the heat stored in the ceramic body, thereby preheating the temperature of the waste gas to close to the oxidation reaction temperature (usually it can be preheated to above 700°C).

[0098] S32: High-temperature oxidation and decomposition. The exhaust gas, after being fully preheated, enters the combustion chamber of the RTO. Under the combined action of the open flame (started if necessary) and the high-temperature ceramic body in the burner, the exhaust gas is heated to the set oxidation temperature (750-950℃). During the sufficient residence time, the VOCs (volatile organic compounds) in the exhaust gas are completely oxidized and decomposed into carbon dioxide and water.

[0099] S33: Potential NOx formation. Under high-temperature oxidation conditions, nitrogen-containing organic molecules (such as amines, nitriles, etc.) in the exhaust gas may be destroyed, and their nitrogen elements react with oxygen to generate nitrogen oxides (NOx), increasing the NOx concentration load in the exhaust gas.

[0100] S34: Heat recovery and purification gas cooling. After the oxidation reaction is completed, the high-temperature purified gas leaves the combustion chamber and enters another (or more) heat storage chambers (final stage heat storage chambers) that are in a cooling state. The high-temperature purified gas transfers the heat it carries to the heat storage ceramic body in the chamber, which has a lower temperature. Its own temperature is significantly reduced (usually it can be reduced to about 50°C higher than the inlet exhaust gas temperature), thereby achieving efficient heat recovery.

[0101] S35: Airflow switching. According to a preset time cycle, the flow path of the exhaust gas is changed by the switching valve. The heat storage chamber, which was originally a preheating chamber, becomes a cooling chamber for heat recovery, while the heat storage chamber, which was originally a cooling chamber, becomes a preheating chamber for preheating the newly entered exhaust gas. This cycle alternates to achieve continuous process and maximize thermal energy utilization.

[0102] The above steps achieve high-temperature oxidation and decomposition of waste gas and efficient heat recovery through regenerative heat exchange, which not only completely degrades VOCs but also minimizes the energy consumption of the system. Its alternating continuous operation mode ensures the stability of the treatment. Although NOx will be generated at high temperatures, it provides the necessary foundation for subsequent SCR deep denitrification, and ultimately achieves efficient synergy between heat recovery and pollutant removal.

[0103] Step S4 includes the following steps:

[0104] S41: High-temperature gas introduction. The high-temperature purified gas (temperature usually >500℃) generated in step S3 (thermal oxidation) is guided to its final stage heat storage chamber through the switching valve of the RTO system.

[0105] S42: Preliminary cooling and heat exchange. The high-temperature purified gas enters the final heat storage chamber and exchanges heat with the heat storage ceramic body, which has a relatively low indoor temperature. Part of the sensible heat of the gas is absorbed by the ceramic body, thus achieving preliminary cooling of the gas.

[0106] S43: Fine temperature control in the extension section. The airflow continues to flow through the extension section of the heat storage ceramic body. Due to its unique physical design (such as length, porosity, material heat capacity) and direct connection with the SCR reactor, a stable temperature gradient field from high temperature to low temperature is formed inside the extension section.

[0107] S44: Natural and gentle cooling. When the high-temperature airflow flows through the porous ceramic channel of the extension section, it undergoes efficient and continuous heat exchange with the ceramic body, which has a huge heat capacity and a specific temperature gradient. Its temperature is reduced naturally and gently, avoiding the equipment stress or local overheating problems that may be caused by excessive temperature difference in traditional rapid cooling methods.

[0108] S45: Airflow homogenization. During the process of flowing through the complex pore structure of the extension section, the airflow is homogenized at the same time, making the temperature and velocity distribution on the cross section more uniform, creating stable and ideal conditions for the subsequent SCR reaction.

[0109] S46: Target temperature delivery. By precisely designing the parameters of the extension section, the temperature of the exhaust gas after the above heat exchange and homogenization process is precisely adjusted to the optimal activity temperature window of the SCR catalyst (300℃±20℃).

[0110] S47: The exhaust gas that has reached the target temperature is directly fed into the SCR reactor for further treatment through a channel that is directly connected by a physical structure, avoiding the temperature drop and heat loss caused by traditional long-distance pipelines.

[0111] The above steps achieve natural, gentle and precise cooling of high-temperature gas through the gradient temperature field of the thermal storage ceramic extension section. The exhaust gas temperature can be stably controlled to the optimal activity range of SCR without the need for an additional rapid cooling device. At the same time, it has the functions of airflow homogenization and direct delivery, completely avoiding heat loss and temperature fluctuations in traditional processes, significantly reducing system energy consumption, and providing a crucial temperature stability prerequisite for efficient SCR denitrification.

[0112] Step S5 includes the following steps:

[0113] S51: Temperature-adaptive exhaust gas receiver, which receives exhaust gas whose temperature is precisely stabilized at 300℃±20℃ after being processed in step S4 (temperature adaptive adjustment without rapid cooling).

[0114] S52: Reducing agent metering and injection. According to the instructions issued by the intelligent control system, the reducing agent (ammonia, NH3) is uniformly injected into the exhaust gas flow in atomized or gas phase form through the precisely metered ammonia injection grid (AIG).

[0115] S53: Ammonia gas is mixed with waste gas. The ammonia gas is fully and evenly mixed with the waste gas by using a mixer after the ammonia injection grid or by using the turbulence effect in the pipeline, forming a gas flow with a uniform distribution of reducing agent and pollutants, which prepares for the subsequent high-efficiency catalytic reaction.

[0116] S54: Final sulfur fixation protection (SO3 capture), which allows the mixed gas to first pass through the first catalyst layer in the SCR reactor—the SO3 capture layer. This catalyst layer is specifically designed to capture and fix any trace amounts of SO3 that may remain in the gas stream (from sulfur that was not fully fixed by S2 or the oxidation of SO2 in the waste gas in the RTO). Through chemisorption, stable sulfates are generated, achieving the final step of "sulfur element migration from the gas phase to the solid phase," providing thorough protection for the core denitrification catalyst.

[0117] S55: Selective catalytic reduction (denitrification). After sulfur fixation protection, the gas then enters the second catalyst layer—a sulfur-resistant denitrification catalyst layer (such as a specially formulated V2O5-WO3 / TiO2 catalyst). Under the action of this catalyst, nitrogen oxides (NOx) in the waste gas undergo a selective catalytic reduction reaction with ammonia (NH3) to produce harmless nitrogen (N2) and water (H2O). This catalyst has special resistance to sulfur poisoning, ensuring high activity and long lifespan even under possible trace sulfur interference.

[0118] S56: Purified gas output. The purified gas (mainly composed of N2, CO2, H2O, and O2) after the denitrification reaction is completed is discharged from the SCR reactor outlet and enters the subsequent process.

[0119] The above steps, through precise temperature control, intelligent ammonia injection, and layered catalytic design, firstly utilize the SO3 capture layer to thoroughly remove residual sulfur components to absolutely protect the core denitrification catalyst, and then efficiently reduce NOx to nitrogen on the sulfur-resistant catalyst. Ultimately, this achieves excellent denitrification efficiency and catalyst stability even in high-sulfur risk environments, ensuring ultra-low emissions and long-term system operation.

[0120] Step S6 includes the following steps:

[0121] S61: Final purified gas delivery, the clean gas after step S5 (selective catalytic reduction denitrification) is delivered to the chimney or exhaust stack by means of an induced draft fan or by means of system pressure difference.

[0122] S62: Real-time sampling of key parameters. A small amount of flue gas sample is continuously and in real time extracted through the sampling probe of the online monitoring system in the flue before the flue gas enters the chimney, and then transported to the analysis instrument.

[0123] S63: NOx concentration analysis, using a NOx concentration analyzer (such as a chemiluminescence analyzer CLD or a differential ultraviolet absorption spectrometer DOAS) to analyze the collected flue gas sample and accurately measure the concentration of nitrogen oxides (NOx) in it;

[0124] S64: NH3 escape concentration analysis, using an NH3 escape analyzer (such as tunable semiconductor laser absorption spectroscopy (TDLAS) or Fourier transform infrared spectroscopy (FTIR)) to analyze the same flue gas sample and accurately measure the concentration of ammonia (NH3) that escapes without participating in the reaction.

[0125] S65: Data acquisition and transmission. The analytical instrument converts the measured real-time concentration signal into a digital signal, collects it through a data acquisition system (such as DCS / PLC), and transmits it to the central control system.

[0126] S66: Compliance assessment and emissions: The control system compares real-time monitoring data with preset emission standard limits. After confirming that the pollutant concentrations (NOx, NH3) meet emission regulations, the purified gas is stably discharged into the atmosphere through a chimney or exhaust stack.

[0127] S67: Data recording and early warning. Continuously record all monitoring data to form a historical database for query and environmental inspection. Once the monitoring value exceeds the set alarm threshold, the system will immediately issue an audible and visual alarm signal to prompt the operator to intervene and check or adjust the process parameters.

[0128] The above steps, through real-time and accurate analysis of NOx and ammonia slip concentrations and linkage with the central control system for intelligent judgment and early warning, not only ensure that the final emissions continuously and stably meet the standards and comply with stringent environmental regulations, but also form a closed-loop feedback mechanism, providing reliable data support for the optimization and adjustment of front-end process parameters, and realizing intelligent and controllable ultra-low emissions and compliance management throughout the entire process.

[0129] Step S7 includes the following steps:

[0130] S71: Real-time monitoring of VOCs at the inlet. Using an online VOCs component analyzer (such as a Fourier transform infrared spectrometer (FTIR) or a proton transfer reaction mass spectrometer (PTR-MS)) installed on the RTO inlet pipe, the composition, concentration and fluctuation of the exhaust gas are monitored in real time and continuously, especially the types and concentrations of nitrogen-containing organic compounds.

[0131] S72: NOx generation prediction model calculation (feedforward) The real-time VOCs data (concentration, type) monitored in step S71 is input into the preset process mathematical model. This model comprehensively considers the conversion rate of different VOCs (especially nitrogen-containing organics) under RTO high temperature conditions, NOx generation factor, gas flow residence time and other parameters to calculate the predicted NOx concentration that will reach the SCR reactor inlet in about 30 seconds.

[0132] S73: Feedforward ammonia injection rate setting. Based on the estimated NOx concentration at the SCR inlet calculated in step S72, and according to the set denitrification efficiency target, the theoretical value of the required ammonia injection rate is calculated in advance through the feedforward control algorithm, and the ammonia injection flow rate of the ammonia injection grid (AIG) is initially set accordingly.

[0133] S74: Real-time monitoring (feedback) of the export effect, receiving the final export monitoring data from step S6 (emissions and monitoring) in real time, namely the actual NOx concentration and actual NH3 escape concentration at the SCR outlet;

[0134] S75: Feedback control calculation and fine-tuning, comparing the actual monitoring value at the outlet with the target set value;

[0135] S76: Control command execution, which sends the final control command, after feedforward-feedback integrated calculation, to the ammonia flow control valve (to adjust the amount of ammonia injected) and the RTO combustion controller (to adjust the furnace temperature) to execute precise actions;

[0136] S77: Self-learning and optimization. The advanced control system continuously records input data, control commands, and output results. Through machine learning algorithms, it continuously optimizes the parameters in the process model (such as the NOx generation factor), making the feedforward prediction increasingly accurate, thereby improving the intelligence and control precision of the entire system in dealing with complex and fluctuating operating conditions.

[0137] Step S75, comparing the actual monitored value at the outlet with the target set value, specifically includes:

[0138] Fine-tuning ammonia injection rate: If the actual NOx concentration exceeds the standard but the NH3 escape does not exceed the standard, the ammonia injection rate is increased proportionally; if the NH3 escape concentration exceeds the standard, the ammonia injection rate is immediately reduced. Feedback control strategies such as PID control algorithm are used to make precise and small-scale dynamic corrections to the feedforward set ammonia injection rate in order to eliminate prediction deviations and system disturbances.

[0139] Adjusting RTO operating conditions: If the outlet NOx concentration remains abnormal and is correlated with VOCs data, the system can output reverse commands to fine-tune the temperature setting of the RTO combustion chamber or the fuel / air quantity of the supplementary burner, so as to optimize the VOCs destruction efficiency and indirectly control the amount of NOx generated.

[0140] The above steps, by real-time monitoring of inlet VOCs and prediction of NOx generation trends, combined with dynamic correction of ammonia injection rate and RTO operating conditions based on outlet concentration data, have achieved a fundamental shift from passive response to active prediction. This significantly improves the system's ability to withstand load fluctuations, accurately avoids ammonia escape or inadequate treatment, and continuously optimizes control precision through self-learning algorithms. Ultimately, this ensures that the entire system can still stably achieve ultra-low emissions and high-efficiency energy-saving operation under complex operating conditions.

[0141] The present invention also provides an integrated treatment system for multi-component industrial waste gas, comprising:

[0142] The waste gas collection and pretreatment module collects industrial waste gas containing VOCs and NOx through a gas collection system and then passes it through a bag filter to remove dust and particulate matter.

[0143] The pre-oxidation and sulfur fixation module introduces pre-treated waste gas into a pre-oxidation reaction layer filled with MnO2-CeO2 catalyst, catalytically oxidizing the sulfur-containing organic matter in the waste gas into SO3, which is then adsorbed and fixed on the catalyst surface to form sulfate.

[0144] The thermal oxidation module introduces the waste gas treated in step two into a regenerative thermal oxidizer, where an oxidation reaction is carried out at a temperature of 750–950°C, decomposing VOCs into CO2 and H2O, while simultaneously oxidizing nitrogen-containing organic matter to generate NOx.

[0145] Without a rapid cooling temperature adaptive adjustment module, the high-temperature purified gas generated in step three is introduced into the final stage regenerator of the RTO, and its temperature is reduced and homogenized to the optimal activity temperature window of the SCR catalyst, 300℃±20℃, through heat exchange.

[0146] The selective catalytic reduction denitrification module mixes the temperature-controlled exhaust gas with the injected reducing agent ammonia, and then passes the mixed gas sequentially through the SO3 capture layer and the sulfur-resistant denitrification catalyst layer in the SCR reactor.

[0147] The emission and monitoring module discharges the purified gas after step five through a chimney and monitors the NOx concentration and NH3 escape concentration in the emitted gas in real time.

[0148] The intelligent dynamic control module monitors the VOCs composition and concentration of the exhaust gas at the RTO inlet in real time, and predicts the NOx concentration reaching the SCR inlet based on this data. It then uses this data to feedback control the amount of ammonia injected. At the same time, based on the NOx concentration and NH3 escape concentration at the SCR outlet monitored in step six, it provides feedback to fine-tune the amount of ammonia injected and the combustion conditions of the RTO.

[0149] The integrated treatment system seamlessly connects functional units such as pretreatment, pre-oxidation and sulfur fixation, high-temperature oxidation, adaptive cooling, deep denitrification, and online monitoring through modular integration and intelligent linkage. It not only achieves efficient synergistic purification of VOCs and NOx and complete blocking of sulfur components, but also significantly improves the system's resistance to load fluctuations and operational stability through intelligent dynamic control. Ultimately, it ensures efficient and stable operation of the entire process and ultra-low emissions of pollutants while significantly reducing energy consumption and operating costs.

[0150] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for integrated treatment of multi-component industrial waste gas, characterized in that, Includes the following steps: S1: Waste gas pretreatment, which collects industrial waste gas containing VOCs and NOx through a gas collection system and passes it through a bag filter to remove dust and particulate matter. S2: Pre-oxidation and sulfur fixation. The pre-treated waste gas is passed into a pre-oxidation reaction layer filled with MnO2-CeO2 catalyst, where sulfur-containing organic matter in the waste gas is catalytically oxidized to SO3 and then adsorbed and fixed on the catalyst surface to form sulfate. S3: Thermal oxidation, the waste gas after step two is passed into a regenerative thermal oxidizer and an oxidation reaction is carried out at a temperature of 750-950℃ to decompose VOCs into CO2 and H2O, and at the same time oxidize nitrogen-containing organic matter to generate NOx; S4: No rapid cooling temperature adaptive adjustment, the high temperature gas generated in step 3 is introduced into the final stage regenerator of RTO, and its temperature is reduced and homogenized to the optimal activity temperature window of SCR catalyst 300℃±20℃ through heat exchange. S5: Selective catalytic reduction denitrification, which mixes the temperature-controlled waste gas with the injected reducing agent ammonia, and then allows the mixed gas to pass sequentially through the SO3 capture layer and the sulfur-resistant denitrification catalyst layer in the SCR reactor. S6: Emissions and monitoring, the purified gas after step five is discharged through a chimney, and the NOx concentration and NH3 escape concentration in the emitted gas are monitored in real time; S7: Intelligent dynamic control system, which monitors the VOCs composition and concentration of the RTO inlet exhaust gas in real time, and predicts the NOx concentration reaching the SCR inlet based on this data, and uses this as a feedforward to control the amount of ammonia injected. At the same time, based on the NOx concentration and NH3 escape concentration at the SCR outlet monitored in step six, it provides feedback to fine-tune the amount of ammonia injected and the combustion conditions of the RTO.

2. The integrated treatment method for multi-component industrial waste gas according to claim 1, characterized in that, Step S1 includes the following steps: S11: Waste gas collection, which effectively captures and collects industrial waste gas containing VOCs and NOx by installing gas collection hoods on production equipment and emission points; S12: Exhaust gas transport: The collected exhaust gas is transported to the pretreatment and subsequent treatment units through a closed pipeline system using the power of a fan. S13: Particulate matter removal, which allows the incoming exhaust gas to pass through a bag filter, using the filtration effect of the filter bags to intercept and remove dust, paint mist, flocculent solid particulate impurities contained in the exhaust gas.

3. The integrated treatment method for multi-component industrial waste gas according to claim 1, characterized in that, Step S2 includes the following steps: S21: Waste gas introduction, the waste gas that has been pretreated in step S1 and has had particulate matter removed is transported to the pre-oxidation reaction layer located at the front end of the RTO system inlet; S22: Catalytic oxidation, which allows waste gas to pass through a reaction layer filled with MnO2-CeO2-based catalyst. Under the action of this catalyst, sulfur-containing organic matter in the waste gas undergoes selective catalytic oxidation and is converted into gaseous SO3. S23: In-situ adsorption and fixation: Utilizing the adsorption characteristics of the catalyst layer itself, the SO3 generated in step S22 is immediately adsorbed onto the active sites on the catalyst surface. S24: Sulfation, where the adsorbed SO3 further reacts with components on the catalyst surface and substances in the environment to generate stable sulfates, thus completing the removal of sulfur.

4. The integrated treatment method for multi-component industrial waste gas according to claim 1, characterized in that, Step S3 includes the following steps: S31: Waste gas introduction and preheating: The waste gas after pre-oxidation and sulfur fixation in step S2 is guided into a heat storage chamber of the RTO through a switching valve for heat exchange. S32: High-temperature oxidation decomposition. The exhaust gas, after being fully preheated, enters the combustion chamber of the RTO, is heated to the set oxidation temperature, and remains there for a sufficient time. S33: Potential NOx formation. Under high-temperature oxidation conditions, nitrogen-containing organic molecules in the exhaust gas are destroyed, and their nitrogen reacts with oxygen to form nitrogen oxides. S34: Heat recovery and purification gas cooling. After the oxidation reaction is completed, the high-temperature purified gas leaves the combustion chamber and enters another heat storage chamber in a cooled state to continue heat exchange. S35: Airflow switching. According to a preset time cycle, the flow path of the exhaust gas is changed through the switching valve, so that the heat storage chamber, which was originally a preheating chamber, becomes a cooling chamber for heat recovery, while the heat storage chamber, which was originally a cooling chamber, becomes a preheating chamber for preheating the newly entered exhaust gas.

5. The integrated treatment method for multi-component industrial waste gas according to claim 1, characterized in that, Step S4 includes the following steps: S41: High-temperature gas introduction, the high-temperature purified gas generated in step S3 is guided to its final stage heat storage chamber through the switching valve of the RTO system. S42: Initial cooling and heat exchange. The high-temperature purified gas enters the final heat storage chamber and exchanges heat with the heat storage ceramic body with a relatively low indoor temperature. S43: Fine temperature control in the extension section, the airflow continues to flow through the extension section of the heat storage ceramic body; S44: Natural and gentle cooling. When the high-temperature airflow flows through the porous ceramic channel of the extension section, it exchanges heat with the ceramic body, which has a huge heat capacity and a specific temperature gradient. S45: Airflow homogenization. During the process of flowing through the complex pore structure of the extension section, the airflow is simultaneously homogenized. S46: Target temperature delivery. By precisely designing the parameters of the extension section, the temperature of the exhaust gas after the above heat exchange and homogenization process is precisely adjusted to the optimal activity temperature window of the SCR catalyst. S47: The exhaust gas that has reached the target temperature is directly fed into the SCR reactor for further treatment through a channel that is directly connected by a physical structure.

6. The integrated treatment method for multi-component industrial waste gas according to claim 1, characterized in that, Step S5 includes the following steps: S51: Temperature-adaptive exhaust gas receiver, which receives exhaust gas whose temperature is precisely stabilized at 300℃±20℃ after being processed in step S4. S52: Reducing agent metering and injection: The reducing agent is injected into the exhaust gas flow through a precisely metered ammonia injection grille. S53: Ammonia gas is mixed with exhaust gas by using a mixer after the ammonia injection grid and by utilizing the turbulence effect in the pipeline to mix the injected ammonia gas with the exhaust gas. S54: Final sulfur fixation protection, which allows the mixed gas to first pass through the SO3 capture layer in the SCR reactor for sulfur fixation; S55: Selective catalytic reduction reaction. After passing through sulfur fixation protection, the gas then enters the sulfur-resistant denitrification catalyst layer to generate nitrogen and water. S56: Purified gas output. The purified gas after the denitrification reaction is completed is discharged from the outlet of the SCR reactor.

7. The integrated treatment method for multi-component industrial waste gas according to claim 1, characterized in that, Step S6 includes the following steps: S61: Final purified gas delivery: The clean gas processed in step S5 is delivered to the chimney via an induced draft fan and with the help of the system pressure difference. S62: Real-time sampling of key parameters. A small amount of flue gas sample is continuously and in real time extracted through the sampling probe of the online monitoring system in the flue before the flue gas enters the chimney, and then transported to the analysis instrument. S63: NOx concentration analysis, using a NOx concentration analyzer to analyze the collected flue gas samples and measure the concentration of nitrogen oxides in them; S44: NH3 escape concentration analysis, using an NH3 escape analyzer to analyze the same flue gas sample and measure the concentration of ammonia gas that escaped without participating in the reaction; S65: Data acquisition and transmission. The analytical instrument converts the measured real-time concentration signal into a digital signal, collects it through the data acquisition system, and transmits it to the central control system. S66: Compliance determination and emission. The control system compares real-time monitoring data with preset emission standard limits. After confirming that the pollutant concentration meets the emission regulations, the purified gas is discharged into the atmosphere through the chimney. S67: Data recording and early warning. Continuously record all monitoring data to form a historical database for query and environmental inspection. When the monitoring value exceeds the set alarm threshold, the system immediately issues an audible and visual alarm signal to prompt the operator to intervene, check and adjust the process parameters.

8. The integrated treatment method for multi-component industrial waste gas according to claim 1, characterized in that, Step S7 includes the following steps: S71: Real-time monitoring of VOCs at the inlet, using an online VOCs component analyzer installed on the RTO inlet pipe to monitor the composition, concentration and fluctuation of the exhaust gas in real time and continuously, especially the types and concentrations of nitrogen-containing organic compounds; S72: NOx generation prediction model calculation: Input the real-time VOCs data monitored in step S71 into the preset process mathematical model to calculate the estimated value of NOx concentration that will reach the inlet of the SCR reactor in about 30 seconds. S73: Feedforward ammonia injection rate setting. Based on the estimated NOx concentration at the SCR inlet calculated in step S72, and according to the set denitrification efficiency target, the theoretical value of the required ammonia injection rate is calculated in advance through the feedforward control algorithm, and the ammonia injection flow rate of the ammonia injection grid is initially set accordingly. S74: Real-time monitoring of the exit effect, receiving the final exit monitoring data from step S6 in real time, namely the actual NOx concentration and the actual NH3 escape concentration at the SCR exit; S75: Feedback control calculation and fine-tuning, comparing the actual monitoring value at the outlet with the target set value; S76: Control command execution, which sends the final control command, after feedforward-feedback integrated calculation, to the ammonia flow control valve and RTO combustion controller to execute precise actions; S77: Self-learning and optimization. The advanced control system continuously records inlet data, control commands, and outlet results, and continuously optimizes the parameters in the process model through machine learning algorithms.

9. The integrated treatment method for multi-component industrial waste gas according to claim 8, characterized in that, The step S75, comparing the actual monitored value at the outlet with the target set value, specifically includes: Fine-tuning ammonia injection rate: If the actual NOx concentration exceeds the standard but the NH3 escape does not exceed the standard, the ammonia injection rate is increased proportionally. If the NH3 escape concentration exceeds the standard, the ammonia injection rate is immediately reduced. Feedback control strategies such as PID control algorithm are used to make precise and small-scale dynamic corrections to the feedforward set ammonia injection rate in order to eliminate prediction deviations and system disturbances. Adjusting RTO operating conditions: If the outlet NOx concentration remains abnormal and is correlated with VOCs data, the system can output reverse commands to fine-tune the temperature setting of the RTO combustion chamber and the fuel / air quantity of the afterburner, so as to optimize the VOCs destruction efficiency and indirectly control the amount of NOx generated.

10. An integrated treatment system for multi-component industrial waste gas, applied to the integrated treatment method for multi-component industrial waste gas as described in any one of claims 1-9, characterized in that, include: The waste gas collection and pretreatment module collects industrial waste gas containing VOCs and NOx through a gas collection system and then passes it through a bag filter to remove dust and particulate matter. The pre-oxidation and sulfur fixation module introduces pre-treated waste gas into a pre-oxidation reaction layer filled with MnO2-CeO2 catalyst, catalytically oxidizing the sulfur-containing organic matter in the waste gas into SO3, which is then adsorbed and fixed on the catalyst surface to form sulfate. The thermal oxidation module introduces the waste gas treated in step two into a regenerative thermal oxidizer, where an oxidation reaction is carried out at a temperature of 750–950°C, decomposing VOCs into CO2 and H2O, while simultaneously oxidizing nitrogen-containing organic matter to generate NOx. Without a rapid cooling temperature adaptive adjustment module, the high-temperature purified gas generated in step three is introduced into the final stage regenerator of the RTO, and its temperature is reduced and homogenized to the optimal activity temperature window of the SCR catalyst, 300℃±20℃, through heat exchange. The selective catalytic reduction denitrification module mixes the temperature-controlled exhaust gas with the injected reducing agent ammonia, and then passes the mixed gas sequentially through the SO3 capture layer and the sulfur-resistant denitrification catalyst layer in the SCR reactor. Emission and monitoring module: The purified gas after step five is discharged through a chimney, and the NOx concentration and NH3 escape concentration in the emitted gas are monitored in real time; The intelligent dynamic control module monitors the VOCs composition and concentration of the exhaust gas at the RTO inlet in real time, and predicts the NOx concentration reaching the SCR inlet based on this data. It then uses this data to feedback control the amount of ammonia injected. At the same time, based on the NOx concentration and NH3 escape concentration at the SCR outlet monitored in step six, it provides feedback to fine-tune the amount of ammonia injected and the combustion conditions of the RTO.

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