Integrated purification system for VOCs waste gas treatment in spraying industry

Abstract

The invention belongs to the technical field of VOCs waste gas treatment, and particularly relates to an integrated purification system for VOCs waste gas treatment in the spraying industry, and the integrated purification system is sequentially provided with a pretreatment module, a spraying absorption module and an adsorption fine treatment module in a communicating mode in the waste gas flowing direction; the integrated purification system further comprises an intelligent control module, the intelligent control module is configured to receive real-time detection data from sensors arranged at inlets and outlets of the spraying absorption module and the adsorption precision treatment module, and the real-time detection data at least comprise the VOCs concentration; and dynamically adjusting at least one operation parameter of the spraying absorption module and the adsorption precision treatment module based on real-time detection data so as to realize self-adaptive purification treatment on the VOCs waste gas. According to the invention, multiple technologies can be coupled and synergistically acted, fine control can be carried out according to the characteristics of the spraying waste gas to realize integrated purification, and the device has important practical significance and application value; the device has the advantages of compact structure, high treatment efficiency, stable operation and low treatment cost.

Description

Technical Field

[0001] This invention belongs to the field of VOCs waste gas treatment technology, specifically relating to an integrated purification system for VOCs waste gas treatment in the spraying industry. Background Technology

[0002] The spray painting industry uses large amounts of paints and thinners containing volatile organic compounds (VOCs) during production, resulting in a large volume of complex organic waste gas with fluctuating concentrations. These VOCs are important precursors to PM2.5 and ozone, posing a serious threat to the atmospheric environment and human health. Therefore, their efficient treatment has become an urgent task in the environmental protection field.

[0003] Currently, VOCs treatment technologies mainly include adsorption, combustion, and absorption. However, each technology often has limitations.

[0004] Single adsorption method: For spray painting exhaust gas, which has a high initial concentration and contains paint mist particles, adsorption materials such as activated carbon are easily clogged and saturated, resulting in high operating resistance, frequent replacement, high operating costs, and limited efficiency in treating high-concentration exhaust gas.

[0005] Single combustion method: Although it is thorough, it has high energy consumption and is not economical for large volume and low concentration of spray painting exhaust gas that is directly burned without concentration.

[0006] Single spray absorption method: effective for some water-soluble or acid-base VOCs, but has limited removal efficiency for most hydrophobic VOCs, making it difficult to consistently meet increasingly stringent emission standards.

[0007] Therefore, this invention provides an integrated purification system for VOCs waste gas treatment in the spraying industry, which can couple and synergistically combine multiple technologies and achieve integrated purification by fine-tuning the control according to the characteristics of spraying waste gas. It has important practical significance and application value. Summary of the Invention

[0008] The purpose of this invention is to provide an integrated purification system for VOCs waste gas treatment in the spraying industry, which can overcome the problems in the background technology and has the advantages of compact structure, high treatment efficiency, stable operation and low treatment cost.

[0009] The specific technical solution adopted by this invention is as follows:

[0010] An integrated purification system for VOCs waste gas treatment in the spraying industry, comprising a pretreatment module, a spray absorption module, and an adsorption fine treatment module connected sequentially along the waste gas flow direction;

[0011] The integrated purification system also includes an intelligent control module, which is configured to:

[0012] Receive real-time detection data from sensors located at the inlet and outlet of the spray absorption module and the adsorption fine treatment module, wherein the real-time detection data includes at least the VOCs concentration;

[0013] Based on the real-time detection data, at least one operating parameter of the spray absorption module and the adsorption fine treatment module is dynamically adjusted to achieve adaptive purification treatment of VOCs waste gas.

[0014] Preferably, the spray absorption module includes a spray tower and a spray liquid circulation system;

[0015] The spray tower is equipped with a packing layer inside, and the specific surface area of ​​the packing layer is 200-500 m² / m³.

[0016] The spray liquid circulation system includes an automatic pH adjustment device to stabilize the pH value of the spray liquid within the range of 5-9.

[0017] Preferably, the operating parameters dynamically adjusted by the intelligent control module include the liquid-to-gas ratio of the spray absorption module; the liquid-to-gas ratio is controlled within the range of 0.5-3 L / m³, preferably 1.0-1.5 L / m³.

[0018] Preferably, the adsorption fine treatment module includes an adsorption tower, which is filled with activated carbon or zeolite as adsorption material, and the specific surface area of ​​the adsorption material is 800-1200 m² / g; the designed residence time of the waste gas in the adsorption tower is 2-10 minutes.

[0019] Preferably, the adsorption fine treatment module is further provided with a differential pressure monitoring unit;

[0020] The intelligent control module is configured to output a replacement or regeneration alarm signal when the saturation of the adsorbent material reaches 80% to 90% based on the data from the differential pressure monitoring unit.

[0021] Preferably, the pretreatment module includes a cooling device and a high-efficiency dust removal device, the high-efficiency dust removal device being configured to reduce the particulate matter concentration in the exhaust gas to below 50 mg / m³ and reduce the exhaust gas temperature to 25-30°C.

[0022] Preferably, the spray liquid circulation system is equipped with a water quality monitoring and purification device, configured to maintain the recycling rate of the spray liquid at over 90%.

[0023] The real-time detection data also includes at least one of temperature and pressure; the operating parameters dynamically adjusted by the intelligent control module also include at least one of the pH value of the spray liquid, the circulation rate, and the inlet air velocity of the adsorption tower.

[0024] Preferably, the operation of the integrated purification system includes the following steps:

[0025] Step S1: The VOCs waste gas generated in the spraying industry is subjected to pretreatment, spray absorption and adsorption fine treatment in sequence;

[0026] Step S2: During the processing, VOCs concentration sensors installed at the inlet and outlet of the spray absorption module and the outlet of the adsorption fine treatment module are used to acquire concentration data in real time, including the inlet concentration C of the spray tower. in Spray tower outlet concentration C mid and the concentration C at the adsorption tower outlet out ;

[0027] Step S3: Based on the real-time concentration data, dynamically adjust the process parameters of spray absorption and adsorption fine treatment. This dynamic adjustment includes at least one or more of the following methods:

[0028] S31: Feedforward-feedback composite control of the liquid-to-gas ratio (L / G) of the spray absorption module:

[0029] Feedforward control: Based on the inlet concentration C of the spray tower in Adjustments are made to the fluctuations; a baseline liquid-to-gas ratio (L / G) is set. base When the concentration C at the inlet of the spray tower in Relative to the reference concentration C at the spray tower inlet inbase When changes occur, the feedforward adjustment amount is initially calculated according to the following formula. :

[0030]

[0031] Wherein, K1 is the feedforward gain coefficient, which is determined based on the waste gas composition and the absorption efficiency of the spray liquid, and its value range is usually 0.2-0.8;

[0032] Feedback control: Based on the spray tower outlet concentration C mid The target value C for the concentration set at the spray tower outlet midtarget Fine-tuning is performed on the deviation; a proportional-integral (PI) control algorithm is used to calculate the feedback adjustment amount. :

[0033]

[0034] in, K p K is the proportionality coefficient. i The integral coefficient;

[0035] Final control value: The feedforward and feedback control values ​​are superimposed to obtain the final liquid-to-gas ratio setpoint. :

[0036]

[0037] The final liquid-to-gas ratio is set within the range of 0.5-3 L / m³.

[0038] S32: Early warning and protective adjustment for the adsorption fine treatment module:

[0039] Calculate the single-stage removal efficiency η of the spray tower. s :

[0040] ;

[0041] When η s Below the preset efficiency threshold η th At that time; preset efficiency threshold η th If the value is 0.7, it is determined that the efficiency of the spray tower has decreased. At this time, the intelligent control module automatically reduces the inlet air velocity of the adsorption tower to prolong the residence time of the waste gas in the adsorption tower and protect the adsorption material from becoming saturated too quickly.

[0042] The flow rate adjustment is based on an empirical formula:

[0043]

[0044] Among them, V base V is the reference flow rate. set To adjust the flow rate, K2 is the adjustment coefficient, and η is the flow rate after adjustment. th η is the preset efficiency threshold. s This refers to the single-stage removal efficiency of the spray tower;

[0045] Step S4: Based on the real-time concentration data C at the outlet of the adsorption tower out Determine whether emissions meet standards and implement regeneration management of adsorption materials:

[0046] When the real-time concentration data C at the outlet of the adsorption tower out Continuously exceeding emission standard limits; emission standard limits such as 50×10 -6 If adjusting the spraying and adsorption parameters fails to effectively reduce the saturation, the system determines that the adsorption material is saturated and issues an alarm requiring replacement or regeneration.

[0047] Meanwhile, the integrated purification system records the cumulative gas volume processed or the high-concentration operating time, establishes a predictive model for the saturation of the adsorption material, and conducts preventive maintenance and early warning.

[0048] The technical effects achieved by this invention are as follows:

[0049] This invention achieves synergistic and efficient purification. Through the synergistic effect of two-stage treatment—"spray absorption + adsorption"—the spray tower, as the front-end treatment unit, removes 70%–85% of most water-soluble or reactive VOCs and residual particulate matter, significantly reducing the load on the subsequent adsorption tower and preventing rapid clogging and saturation of the adsorption material. The adsorption tower, as the back-end fine treatment unit, ensures that the final outlet VOC concentration remains stable at (10-50) × 10⁻⁶. -6 Extremely low levels, meeting the most stringent emission standards.

[0050] This invention operates stably and reliably; the integrated purification system is designed with a complete pretreatment and spraying system to address the high concentration and particulate matter content of the spraying exhaust gas, protecting the core adsorption unit and ensuring the long-term stable operation of the entire system.

[0051] This invention boasts high intelligence and economy; through an integrated monitoring and control unit, it achieves real-time monitoring and automatic optimization of key operating parameters, including liquid-to-gas ratio, pH, temperature, and pressure. This not only ensures optimal treatment efficiency but also minimizes the consumption of chemicals and energy, reducing operating costs. The high circulation rate of the spray liquid also reflects the system's green and environmentally friendly characteristics.

[0052] This invention features modular integration; the integrated purification system highly integrates multiple processing units and control systems, resulting in a compact structure and small footprint, making it particularly suitable for technical upgrades or new construction projects in space-constrained spray painting workshops. Attached Figure Description

[0053] Figure 1 This is a system block diagram of an integrated purification system for VOCs waste gas treatment in the spraying industry according to the present invention;

[0054] Figure 2 This is a flowchart illustrating the operation of an integrated purification system for VOCs waste gas treatment in the spraying industry, as described in this invention. Detailed Implementation

[0055] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0056] like Figures 1-2 As shown, an integrated purification system for VOCs waste gas treatment in the spraying industry is provided with a pretreatment module, a spray absorption module and an adsorption fine treatment module connected in sequence along the waste gas flow direction.

[0057] The integrated purification system also includes an intelligent control module, which is configured to:

[0058] Receive real-time detection data from sensors located at the inlet and outlet of the spray absorption module and the adsorption fine treatment module, wherein the real-time detection data includes at least the VOCs concentration;

[0059] Based on the real-time detection data, at least one operating parameter of the spray absorption module and the adsorption fine treatment module is dynamically adjusted to achieve adaptive purification treatment of VOCs waste gas.

[0060] This invention achieves synergistic and efficient purification. Through the synergistic effect of two-stage treatment—"spray absorption + adsorption"—the spray tower, as the front-end treatment unit, removes 70%–85% of most water-soluble or reactive VOCs and residual particulate matter, significantly reducing the load on the subsequent adsorption tower and preventing rapid clogging and saturation of the adsorption material. The adsorption tower, as the back-end fine treatment unit, ensures that the final outlet VOC concentration remains stable at (10-50) × 10⁻⁶. -6 Extremely low levels, meeting the most stringent emission standards.

[0061] Preferably, the spray absorption module includes a spray tower and a spray liquid circulation system;

[0062] The spray tower is equipped with a packing layer inside, and the specific surface area of ​​the packing layer is 200-500 m² / m³.

[0063] The spray liquid circulation system includes an automatic pH adjustment device to stabilize the pH value of the spray liquid within the range of 5-9.

[0064] Preferably, the operating parameters dynamically adjusted by the intelligent control module include the liquid-to-gas ratio of the spray absorption module; the liquid-to-gas ratio is controlled within the range of 0.5-3 L / m³, preferably 1.0-1.5 L / m³.

[0065] Preferably, the adsorption fine treatment module includes an adsorption tower, which is filled with activated carbon or zeolite as adsorption material, and the specific surface area of ​​the adsorption material is 800-1200 m² / g; the designed residence time of the waste gas in the adsorption tower is 2-10 minutes.

[0066] Preferably, the adsorption fine treatment module is further provided with a differential pressure monitoring unit;

[0067] The intelligent control module is configured to output a replacement or regeneration alarm signal when the saturation of the adsorbent material reaches 80% to 90% based on the data from the differential pressure monitoring unit.

[0068] Preferably, the pretreatment module includes a cooling device and a high-efficiency dust removal device, the high-efficiency dust removal device being configured to reduce the particulate matter concentration in the exhaust gas to below 50 mg / m³ and reduce the exhaust gas temperature to 25-30°C.

[0069] Preferably, the spray liquid circulation system is equipped with a water quality monitoring and purification device, configured to maintain the recycling rate of the spray liquid at over 90%.

[0070] The real-time detection data also includes at least one of temperature and pressure; the operating parameters dynamically adjusted by the intelligent control module also include at least one of the pH value of the spray liquid, the circulation rate, and the inlet air velocity of the adsorption tower.

[0071] This invention operates stably and reliably; the integrated purification system is designed with a complete pretreatment and spraying system to address the high concentration and particulate matter content of the spraying exhaust gas, protecting the core adsorption unit and ensuring the long-term stable operation of the entire system.

[0072] This invention boasts high intelligence and economy; through an integrated monitoring and control unit, it achieves real-time monitoring and automatic optimization of key operating parameters, including liquid-to-gas ratio, pH, temperature, and pressure. This not only ensures optimal treatment efficiency but also minimizes the consumption of chemicals and energy, reducing operating costs. The high circulation rate of the spray liquid also reflects the system's green and environmentally friendly characteristics.

[0073] This invention features modular integration; the integrated purification system highly integrates multiple processing units and control systems, resulting in a compact structure and small footprint, making it particularly suitable for technical upgrades or new construction projects in space-constrained spray painting workshops.

[0074] like Figures 1-2 As shown, the operation process of the integrated purification system in this invention includes the following steps:

[0075] Step S1: The VOCs waste gas generated in the spraying industry is subjected to pretreatment, spray absorption and adsorption fine treatment in sequence;

[0076] Step S2: During the processing, VOCs concentration sensors installed at the inlet and outlet of the spray absorption module and the outlet of the adsorption fine treatment module are used to acquire concentration data in real time, including the inlet concentration C of the spray tower. in Spray tower outlet concentration C mid and the concentration C at the adsorption tower outlet out ;

[0077] Step S3: Based on the real-time concentration data, dynamically adjust the process parameters of spray absorption and adsorption fine treatment. This dynamic adjustment includes at least one or more of the following methods:

[0078] S31: Feedforward-feedback composite control of the liquid-to-gas ratio (L / G) of the spray absorption module:

[0079] Feedforward control: Based on the inlet concentration C of the spray tower in Adjustments are made to the fluctuations; a baseline liquid-to-gas ratio (L / G) is set. base When the concentration C at the inlet of the spray tower in Relative to the reference concentration C at the spray tower inlet inbase When changes occur, the feedforward adjustment amount is initially calculated according to the following formula. :

[0080]

[0081] Wherein, K1 is the feedforward gain coefficient, which is determined based on the waste gas composition and the absorption efficiency of the spray liquid, and its value range is usually 0.2-0.8;

[0082] Feedback control: Based on the spray tower outlet concentration C mid The target value C for the concentration set at the spray tower outlet midtarget Fine-tuning is performed on the deviation; a proportional-integral (PI) control algorithm is used to calculate the feedback adjustment amount. :

[0083]

[0084] in, K p K is the proportionality coefficient. i The integral coefficient;

[0085] Final control value: The feedforward and feedback control values ​​are superimposed to obtain the final liquid-to-gas ratio setpoint. :

[0086]

[0087] The final liquid-to-gas ratio is set within the range of 0.5-3 L / m³.

[0088] S32: Early warning and protective adjustment for the adsorption fine treatment module:

[0089] Calculate the single-stage removal efficiency η of the spray tower. s :

[0090] ;

[0091] When η s Below the preset efficiency threshold η th At that time; preset efficiency threshold η thIf the value is 0.7, it is determined that the efficiency of the spray tower has decreased. At this time, the intelligent control module automatically reduces the inlet air velocity of the adsorption tower to prolong the residence time of the waste gas in the adsorption tower and protect the adsorption material from becoming saturated too quickly.

[0092] The flow rate adjustment is based on an empirical formula:

[0093]

[0094] Among them, V base V is the reference flow rate. set To adjust the flow rate, K2 is the adjustment coefficient, and η is the flow rate after adjustment. th η is the preset efficiency threshold. s This refers to the single-stage removal efficiency of the spray tower;

[0095] Step S4: Based on the real-time concentration data C at the outlet of the adsorption tower out Determine whether emissions meet standards and implement regeneration management of adsorption materials:

[0096] When the real-time concentration data C at the outlet of the adsorption tower out Continuously exceeding emission standard limits; emission standard limits such as 50×10 -6 If adjusting the spraying and adsorption parameters fails to effectively reduce the saturation, the system determines that the adsorption material is saturated and issues an alarm requiring replacement or regeneration.

[0097] Meanwhile, the integrated purification system records the cumulative gas volume processed or the high-concentration operating time, establishes a predictive model for the saturation of the adsorption material, and conducts preventive maintenance and early warning.

[0098] In practical applications, for example, the VOCs waste gas generated in an automotive painting workshop mainly consists of benzene, toluene, xylene, and ester and ketone solvents, with an initial concentration of approximately 600 × 10⁻⁶. -6 The temperature is approximately 50°C and contains a small amount of overspray paint mist.

[0099] The exhaust gas first enters the pretreatment unit, where the temperature is reduced to 28°C by an indirect cooler, and then enters the bag filter to reduce the particulate matter concentration to below 30 mg / m³.

[0100] The pretreated exhaust gas is fed into the spray absorption unit by an induced draft fan. The spray tower packing layer uses Pall rings with a specific surface area of ​​350 m² / m³. The liquid-to-gas ratio is precisely controlled at 1.2 L / m³ via PLC. The spray solution is an alkaline aqueous solution (pH=8.0) with added specific surfactants to enhance the absorption of acidic VOCs. After this stage, approximately 80% of the VOCs are removed.

[0101] Subsequently, the exhaust gas enters the activated carbon adsorption tower of the adsorption and fine treatment unit. The tower is filled with honeycomb activated carbon with a specific surface area of ​​1000 m² / g, and the exhaust gas residence time is set to 5 minutes. During this stage, the vast majority of residual VOCs are adsorbed and captured.

[0102] Finally, the treated clean gas is emitted through the chimney. The monitoring and intelligent control unit displays the outlet VOCs concentration as stable at 25 × 10⁻⁶ in real time. -6 The system pressure is maintained at approximately 0.3 MPa. When the system detects a continuous increase in the pressure difference of the adsorption tower and reaches a preset threshold, corresponding to a saturation of approximately 85%, an alarm to replace the activated carbon is automatically issued.

[0103] During the entire system operation, the spray liquid recycling rate exceeded 90%, achieving the goal of efficient, stable and economical operation.

[0104] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. An integrated purification system for VOCs waste gas treatment in the spraying industry, characterized in that: A pretreatment module, a spray absorption module, and an adsorption fine treatment module are sequentially connected and arranged along the direction of exhaust gas flow. The integrated purification system also includes an intelligent control module, which is configured to: Receive real-time detection data from sensors located at the inlet and outlet of the spray absorption module and the adsorption fine treatment module, wherein the real-time detection data includes at least the VOCs concentration; Based on the real-time detection data, at least one operating parameter of the spray absorption module and the adsorption fine treatment module is dynamically adjusted to achieve adaptive purification treatment of VOCs waste gas.

2. The integrated purification system for VOCs waste gas treatment in the spraying industry according to claim 1, characterized in that: The spray absorption module includes a spray tower and a spray liquid circulation system; The spray tower is equipped with a packing layer inside, and the specific surface area of ​​the packing layer is 200-500 m² / m³. The spray liquid circulation system includes an automatic pH adjustment device to stabilize the pH value of the spray liquid within the range of 5-9.

3. The integrated purification system for VOCs waste gas treatment in the spraying industry according to claim 2, characterized in that: The operating parameters dynamically adjusted by the intelligent control module include the liquid-to-gas ratio of the spray absorption module; the liquid-to-gas ratio is controlled within the range of 0.5-3 L / m³.

4. The integrated purification system for VOCs waste gas treatment in the spraying industry according to claim 3, characterized in that: The adsorption fine treatment module includes an adsorption tower, which is filled with activated carbon or zeolite as adsorption material. The specific surface area of ​​the adsorption material is 800-1200 m² / g. The designed residence time of the waste gas in the adsorption tower is 2-10 minutes.

5. The integrated purification system for VOCs waste gas treatment in the spraying industry according to claim 4, characterized in that: The adsorption fine treatment module is also equipped with a differential pressure monitoring unit; The intelligent control module is configured to output a replacement or regeneration alarm signal when the saturation of the adsorbent material reaches 80% to 90% based on the data from the differential pressure monitoring unit.

6. The integrated purification system for VOCs waste gas treatment in the spraying industry according to claim 5, characterized in that: The pretreatment module includes a cooling device and a high-efficiency dust removal device, which is configured to reduce the particulate matter concentration in the exhaust gas to below 50 mg / m³ and reduce the exhaust gas temperature to 25-30°C.

7. An integrated purification system for VOCs waste gas treatment in the spraying industry according to claim 6, characterized in that: The spray liquid circulation system is equipped with a water quality monitoring and purification device, which is configured to maintain the recycling rate of the spray liquid at over 90%. The real-time detection data also includes at least one of temperature and pressure; the operating parameters dynamically adjusted by the intelligent control module also include at least one of the pH value of the spray liquid, the circulation rate, and the inlet air velocity of the adsorption tower.

8. An integrated purification system for VOCs waste gas treatment in the spraying industry according to claim 7, characterized in that: The operation of the integrated purification system includes the following steps: Step S1: The VOCs waste gas generated in the spraying industry is subjected to pretreatment, spray absorption and adsorption fine treatment in sequence; Step S2: During the processing, VOCs concentration sensors installed at the inlet and outlet of the spray absorption module and the outlet of the adsorption fine treatment module are used to acquire concentration data in real time, including the inlet concentration C of the spray tower. in Spray tower outlet concentration C mid and the concentration C at the adsorption tower outlet out ; Step S3: Based on the real-time concentration data, dynamically adjust the process parameters of spray absorption and adsorption fine treatment. This dynamic adjustment includes at least one or more of the following methods: S31: Feedforward-feedback composite control of the liquid-to-gas ratio (L / G) of the spray absorption module: Feedforward control: Based on the inlet concentration C of the spray tower in Adjustments are made to the fluctuations; a baseline liquid-to-gas ratio (L / G) is set. base When the concentration C at the inlet of the spray tower in Relative to the reference concentration C at the spray tower inlet inbase When changes occur, the feedforward adjustment amount is initially calculated according to the following formula. : Wherein, K1 is the feedforward gain coefficient, which is determined based on the waste gas composition and the absorption efficiency of the spray liquid, and its value range is usually 0.2-0.8; Feedback control: Based on the spray tower outlet concentration C mid The target value C for the concentration set at the spray tower outlet midtarget Fine-tuning is performed on the deviation; a proportional-integral (PI) control algorithm is used to calculate the feedback adjustment amount. : in, K p K is the proportionality coefficient. i The integral coefficient; Final control quantity: The feedforward and feedback control quantities are superimposed to obtain the final liquid-to-gas ratio setpoint. : The final liquid-to-gas ratio is set within the range of 0.5-3 L / m³. S32: Early warning and protective adjustment for the adsorption fine treatment module: Calculate the single-stage removal efficiency η of the spray tower. s : ； When η s Below the preset efficiency threshold η th At that time; preset efficiency threshold η th If the value is 0.7, it is determined that the efficiency of the spray tower has decreased. At this time, the intelligent control module automatically reduces the inlet air velocity of the adsorption tower to prolong the residence time of the waste gas in the adsorption tower and protect the adsorption material from becoming saturated too quickly. The flow rate adjustment is based on an empirical formula: Among them, V base V is the reference flow rate. set To adjust the flow rate, K2 is the adjustment coefficient, and η is the flow rate after adjustment. th η is the preset efficiency threshold. s This refers to the single-stage removal efficiency of the spray tower; Step S4: Based on the real-time concentration data C at the outlet of the adsorption tower out Determine whether emissions meet standards and implement regeneration management of adsorption materials: When the real-time concentration data C at the outlet of the adsorption tower out If the emission standard limit is continuously exceeded and cannot be effectively reduced by adjusting the spray and adsorption parameters, the system determines that the adsorption material is saturated and issues an alarm that it needs to be replaced or regenerated. Meanwhile, the integrated purification system records the cumulative gas volume processed or the high-concentration operating time, establishes a predictive model for the saturation of the adsorption material, and conducts preventive maintenance and early warning.

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