Advanced catalytic oxidative deodorization method

Abstract

This invention discloses an advanced catalytic oxidation deodorization method, relating to the field of odorous waste gas treatment technology, including S1, odor collection and pretreatment: odorous gases generated from pollution sources are collected in a closed system, large particulate dust and suspended droplets are removed from the gas, and the gas flow rate and relative humidity are adjusted to obtain pretreated gas; this invention achieves simultaneous and efficient degradation of multiple components of odorous gases such as H2S, NH3, and VOCs through a coupled process of staged pre-oxidation and deep ozone oxidation, relying on the layered layout of ozone-enhanced oxidation components, precise ozone replenishment, and airflow turbulence-enhanced contact design, while still exhibiting excellent deep oxidation and decomposition effects on recalcitrant hydrophobic pollutants; through rapid ozone oxidation reaction at room temperature and pressure, the reaction residence time is shortened, significantly reducing equipment footprint and civil engineering costs; through a non-biological catalytic system of pure ozone oxidation, no microbial domestication and maintenance are required, and it is unaffected by environmental factors such as temperature and pH.

Description

Technical Field

[0001] This invention relates to the field of odorous waste gas treatment technology, specifically an advanced catalytic oxidation deodorization method. Background Technology

[0002] Odor pollution is one of the seven typical types of air pollution. Essentially, it refers to any gaseous substance that irritates the olfactory organs, causes discomfort, and damages the living environment. It not only causes irreversible acute and chronic damage to the human respiratory, nervous, and endocrine systems but also easily triggers complaints about the surrounding environment and poses ecological risks. It is widely generated in industries such as wastewater treatment, waste disposal, livestock farming, chemical and pharmaceutical manufacturing, and food processing, and is a key area of ​​current air pollution control and a hot topic of public concern. Odor removal technology uses physical, chemical, and biological methods to decompose, transform, adsorb, and remove odor pollutants to meet environmental emission standards. It is a core technological support for implementing air pollution control requirements, ensuring the safety of the living environment, and promoting the green development of related industries.

[0003] Catalytic oxidation deodorization technology activates oxidants through catalytic reactions, generating highly oxidizing free radicals that rapidly oxidize and decompose odorous pollutants into harmless small molecules such as carbon dioxide, water, and inorganic salts in a short time. Compared with traditional physical adsorption and chemical absorption technologies, it has the advantages of thorough degradation, no secondary pollution, and a wide range of applicable pollutants. Compared with biological deodorization technology, it has the characteristics of fast reaction rate, no start-up delay, and strong environmental adaptability. It is the core technology direction with the greatest development potential in the field of odor control and a key focus of industry research and development.

[0004] Currently, the mainstream deodorization technology in the industry is biological deodorization. While this technology has some applicability in the treatment of conventional low-concentration odors, it faces many insurmountable technical bottlenecks in practical engineering applications: it can achieve a removal rate of 80%-95% for common water-soluble odor substances such as hydrogen sulfide and ammonia, but its degradation effect on hydrophobic and recalcitrant odor substances is extremely poor, resulting in significant fluctuations in the overall removal rate; the equipment has a large overall footprint, requiring the construction of large-scale biological filters or trickling filters, leading to high costs for civil engineering and packing materials, and substantial upfront investment; the microbial community requires a long growth and acclimatization period, with the start-up period typically lasting up to [duration missing]. It takes 2-4 weeks to achieve the best treatment effect, which cannot quickly respond to emergency deodorization needs; the treatment effect is significantly affected by environmental factors such as temperature, pH, and humidity. The treatment efficiency drops sharply under low temperature conditions in winter, and the microbial community is easily inactivated under high concentration odor shock load, resulting in poor treatment effect stability; daily operation and maintenance require continuous monitoring of microbial community growth, regular replenishment of nutrient solution, and replacement of failed packing materials, which requires high professional skills from operation and maintenance personnel and results in high operation and maintenance costs throughout the entire life cycle. It is difficult to meet the current demand for odor control in multiple scenarios, with high standards and low cost. Therefore, it is of great significance to develop an advanced catalytic oxidation deodorization method. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an advanced catalytic oxidation deodorization method. This method achieves simultaneous and efficient degradation of multiple odorous gases such as H2S, NH3, and VOCs through a coupled process of staged pre-oxidation and deep ozone oxidation. It relies on the layered deployment of ozone-enhanced oxidation components, precise ozone replenishment, and airflow turbulence-enhanced contact design. It also exhibits excellent deep oxidation and decomposition effects on recalcitrant hydrophobic pollutants. The rapid ozone oxidation reaction at ambient temperature and pressure shortens the reaction residence time. Using a non-biological catalytic system of pure ozone oxidation, it requires no microbial cultivation or maintenance and is unaffected by environmental factors such as temperature and pH. Furthermore, an intelligent adaptive control system adjusts key operating parameters such as ozone dosage to achieve stable operation under impact loads.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an advanced catalytic oxidation deodorization method, the method comprising the following steps: S1. Odor Collection and Pretreatment: The malodorous gases generated by the pollution source are collected in a closed system to remove large particulate dust and suspended droplets from the gas, and the gas flow rate and relative humidity are adjusted to obtain pretreated gas. S2, Primary Pre-oxidation Activation: The pretreated gas is sent into the reaction tower and, after uniform gas distribution, enters the pre-oxidation activation zone to generate highly oxidizing active free radicals, which fully contact and react with the odorous gas to complete the initial degradation of easily oxidized odorous components and obtain the pre-oxidized gas. S3, Secondary Deep Ozone Oxidation: The pre-oxidized gas is sent into the ozone deep oxidation reactor. Through the ozone-enhanced oxidation components installed in the reactor, the recalcitrant odor components are decomposed by deep ozone oxidation at room temperature and pressure to obtain the catalytically oxidized gas. S4. Exhaust gas purification and emission: The gas after catalytic oxidation is sent to the residual exhaust gas purifier to remove trace pollutants and residual oxidants. After passing the test, it is discharged through the exhaust pipe.

[0007] Furthermore, in step S1, a sealed gas collection hood matched one-to-one with the pollution source location is used in conjunction with a negative pressure collection pipeline to complete the sealed collection of odorous gas. During the collection process, the negative pressure value in the collection pipeline is kept stable. First, a primary filter module removes large particles of dust and suspended droplets with a particle size greater than 10 μm from the gas. Then, a rectifier module is used to uniformly flow the gas and adjust the uniformity of the gas cross-sectional flow velocity. After that, the gas flow velocity is adjusted to a set range. At the same time, a temperature and humidity control module is used to adjust the relative humidity of the gas to a set range to complete the pretreatment of the odorous gas.

[0008] Furthermore, in step S1, the sealed gas collection hood is made of fiberglass or stainless steel, and the coverage area of ​​the gas collection hood completely covers the odor emission point of the pollution source. The negative pressure value in the collection pipeline is matched and set according to the emission amount of the pollution source. The primary filter module adopts a plate primary filter, and the filtration accuracy is matched with the dust particle size in the gas. The rectifier module adopts multiple sets of parallel rectifier grids, and the spacing of the rectifier grids is matched with the gas flow rate. After the gas is uniformly treated, the flow rate and relative humidity are adjusted.

[0009] Furthermore, in step S2, the pretreated gas is introduced into the reaction tower through the inlet at the bottom of the reaction tower. It is first uniformly distributed by the porous gas distribution plate at the bottom of the reaction tower, so that the gas rises uniformly along the cross-section of the reaction tower and enters the pre-oxidation activation zone. Ozone oxidant is added by the plate ozone generating unit in the pre-oxidation activation zone, and the ozone is activated by the ultraviolet activation module to generate strong oxidizing active free radicals. The gas flows along the baffle channel in the pre-oxidation activation zone and fully contacts the active free radicals in a countercurrent manner to complete the initial degradation of easily oxidized odor components.

[0010] Furthermore, in step S3, the ozone-enhanced oxidation component in the ozone deep oxidation reactor consists of an ozone uniform distribution grid and a plate-type ozone replenishment unit. The ozone uniform distribution grid has a corrosion-resistant porous structure, and its air inlet end is sealed to the plate-type ozone replenishment unit. The plate-type ozone replenishment unit is a high-concentration plate-type ozone generating module with high ozone production concentration and excellent hydroxyl radical conversion efficiency. The ozone dosage can be adjusted in real time according to the content of the recalcitrant odor components. The ozone-enhanced oxidation component is fixed inside the reactor in a layered arrangement. An airflow baffle is set between two adjacent layers of ozone uniform distribution grids. After pre-oxidation, the gas passes through the ultra-high concentration ozone zone formed by each layer of ozone uniform distribution grid in sequence, and fully contacts the high-concentration ozone and the in-situ generated hydroxyl radicals, simultaneously completing strong catalytic oxidation and deep deodorization decomposition.

[0011] Furthermore, in step S3, before the ozone-enhanced oxidation component is installed into the ozone deep oxidation reactor, the airtightness of the ozone uniform distribution grid is tested. At the same time, the pipeline and grid are purged with ozone through the plate ozone replenishment unit to remove internal impurities and residual air. After the pretreatment is completed, the multiple layers of ozone uniform distribution grid are fixed in the fixed frame of the reactor in the order from bottom to top. The airflow baffle between each layer of ozone uniform distribution grid adopts an arc-shaped baffle structure. The baffle angle of the airflow baffle is matched with the gas flow rate. The air distribution holes of the adjacent two layers of ozone uniform distribution grid are staggered to ensure sufficient contact and reaction between the gas and the high concentration of ozone.

[0012] Furthermore, in step S3, the ozone deep oxidation reactor is located in the middle region of the reaction tower. After pre-oxidation, the gas flows upward from the pre-oxidation activation zone and directly enters the ozone deep oxidation reactor. The flow direction of the gas in the reactor is opposite to the gas distribution direction of the ozone distribution grid, which improves the gas-liquid contact efficiency and controls the ozone contact reaction time of the gas in the reactor within a set range. The entire reaction process is carried out under normal temperature and pressure, without the need for additional heating or pressurization of the gas, thus completing the deep ozone oxidation and decomposition of the recalcitrant odor components.

[0013] Furthermore, in step S4, the gas after catalytic oxidation is sent out from the top outlet of the reaction tower and into the residual exhaust gas purifier. The residual exhaust gas purifier is equipped with a primary filter section, a modified activated carbon adsorption section, and a demisting section in sequence. The gas passes through the primary filter section, the modified activated carbon adsorption section, and the demisting section in sequence. First, the primary filter section removes the trace amount of filler dust entrained in the gas. Then, the modified activated carbon adsorption section removes the trace pollutants and residual oxidant in the gas. Finally, the demisting section removes the saturated water mist in the gas, thus completing the deep purification treatment of the exhaust gas.

[0014] Furthermore, in step S4, the gas treated by the residual exhaust gas purifier is first sent into the detection pipeline of the online detection instrument. The online detection instrument continuously and in real time detects the concentration of various pollutants in the gas. During the detection process, data calibration is completed at set time intervals. After the detection is completed, the gas is sent into a stainless steel exhaust stack. The height of the exhaust stack is set according to the emission standards of the corresponding industry. The gas is then discharged at high altitude through the exhaust stack.

[0015] Furthermore, the method also includes step S5, intelligent adaptive control, in which online detection instruments are installed at the inlet and outlet of the reaction tower respectively. The online detection instruments collect data on the concentration and composition of odorous gases at the inlet and pollutant emission data at the outlet in real time. The collected data is transmitted to the PLC control system in real time. Based on the received data, the PLC control system adjusts the operating frequency of the variable frequency fan in the collection pipeline, the output power of the plate ozone generator module in the pre-oxidation activation zone, the dosage of high-concentration ozone, and the operating power of the ultraviolet activation module in a coordinated manner to complete the adaptive adjustment of the system's operating conditions.

[0016] Compared with existing technologies, this advanced catalytic oxidation deodorization method has the following advantages: This invention achieves simultaneous and efficient degradation of multiple odorous gases such as H2S, NH3, and VOCs through a coupled process of staged pre-oxidation and deep ozone oxidation. It relies on the layered deployment of ozone-enhanced oxidation components, precise ozone replenishment, and airflow turbulence-enhanced contact design. It also exhibits excellent deep oxidation and decomposition effects on recalcitrant hydrophobic pollutants. The rapid ozone oxidation reaction at ambient temperature and pressure shortens the reaction residence time, significantly reducing equipment footprint and construction costs. The non-biological catalytic system of pure ozone oxidation eliminates the need for microbial cultivation and maintenance, and is unaffected by environmental factors such as temperature and pH. This fundamentally solves the industry pain points of slow start-up and low efficiency in winter associated with traditional biological deodorization technologies. An intelligent adaptive control system adjusts key operating parameters such as ozone dosage to achieve stable operation under impact loads. Furthermore, the ozone-enhanced oxidation components have a simple structure and no filler loss issues, significantly reducing equipment maintenance difficulty and total lifecycle operating costs.

[0017] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A flowchart of an advanced catalytic oxidation deodorization method; Figure 2 This is a flowchart of an advanced catalytic oxidation deodorization method. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0021] This invention addresses the technical bottlenecks of traditional biological deodorization processes, such as poor treatment effect on recalcitrant pollutants, large equipment footprint, slow start-up, and significant susceptibility to environmental factors. It proposes an advanced catalytic oxidation deodorization method that couples staged pre-oxidation with deep ozone oxidation. Combined with an intelligent adaptive control system, it achieves efficient and stable degradation of multi-component odorous gases. The entire process is carried out at ambient temperature and pressure, significantly reducing equipment and maintenance costs.

[0022] The core process of this method consists of five steps. The first step is odor collection and pretreatment. A sealed fiberglass or stainless steel gas collection hood, matched to the pollution source, combined with a negative pressure pipeline, collects the odorous gas. Large particles (greater than 10 μm) and suspended droplets are removed by a plate-type primary filter. After being uniformly distributed by a rectifier grid, the gas flow rate and relative humidity are adjusted to obtain pretreated gas. The second step is primary pre-oxidation activation. The pretreated gas enters from the bottom of the reaction tower, is evenly distributed by a porous gas distribution plate, and then enters the pre-oxidation activation zone. Strongly oxidizing free radicals are generated by a plate-type ozone generator and an ultraviolet activation module. The gas and free radicals come into countercurrent contact, completing the initial degradation of easily oxidized odorous components.

[0023] The third step is secondary deep ozone oxidation. After pre-oxidation, the gas directly enters the ozone deep oxidation reactor in the middle of the reaction tower. Through airtightness testing and ozone purging pretreatment, and the layered ozone-enhanced oxidation components, deep ozone oxidation decomposition of recalcitrant components is carried out at room temperature and pressure. This component consists of an ozone uniform distribution grid and a high-efficiency variable frequency plate ozone replenishment unit. The ozone uniform distribution grid has a corrosion-resistant porous structure, and arc-shaped airflow baffles are set between the layers to ensure sufficient contact and reaction between the gas and the high concentration of ozone. The fourth step is exhaust gas purification and emission. After catalytic oxidation, the gas is filtered, adsorbed, and demisted by a residual exhaust gas purifier to remove trace pipeline impurities, pollutants, and residual oxidants. After real-time monitoring and calibration by online monitoring instruments, it is discharged into the atmosphere through a stainless steel exhaust stack after meeting the standards.

[0024] Finally, for intelligent adaptive control, online monitoring instruments are installed at the inlet and outlet of the reaction tower to transmit data such as gas concentration and composition to the PLC control system in real time. The system then adjusts the frequency of the variable frequency fan, the ozone dosage in the primary pre-oxidation activation zone and the secondary deep ozone oxidation zone, and the power of the ultraviolet activation module to achieve adaptive adjustment of the operating conditions.

[0025] This method can simultaneously and efficiently degrade multiple components of malodorous gases such as hydrogen sulfide, ammonia, and volatile organic compounds. It has excellent removal effects on recalcitrant hydrophobic pollutants, requires no microbial acclimatization or maintenance, is unaffected by environmental factors such as temperature and pH, and can operate stably under impact loads. It significantly reduces the equipment footprint and civil engineering costs. The ozone-enhanced oxidation components do not suffer from filler loss, reducing the difficulty of operation and maintenance and the total life cycle cost.

[0026] Example 1 This embodiment addresses the treatment of odorous waste gas generated in the biological treatment tank and sludge dewatering room of a municipal wastewater treatment plant. The main components of the waste gas are H2S and NH3, containing a small amount of low-concentration alcohol VOCs. The waste gas emission volume is 5000 m³ / h. 3 / h, the ambient temperature is 5-35℃, and the H2S concentration in the exhaust gas is approximately 50mg / m³. 3 The concentration of NH3 is approximately 80 mg / m³.3 The concentration of alcohol-based VOCs is approximately 20 mg / m³. 3 The advanced catalytic oxidation deodorization method of this invention is used for treatment. By matching and adapting the process parameters, it achieves efficient degradation of multi-component odorous gases. The equipment has a small footprint, is easy to operate and maintain, and is suitable for continuous, low-concentration odor treatment conditions in wastewater treatment plants. See also Figure 1 and Figure 2 The specific steps in this embodiment are as follows: Odor Collection and Pretreatment: Custom-made sealed fiberglass hoods were installed at two odor emission points: the biological treatment tank and the sludge dewatering room. The edges of the hoods were sealed with silicone gaskets to adhere to the pollution source. Corrosion-resistant negative pressure collection pipelines were used to achieve sealed collection. A variable frequency negative pressure fan maintained a stable negative pressure of -50 Pa within the collection pipelines. After passing through a G4 pre-filter to remove dust and droplets larger than 10 μm, the exhaust gas passed through three sets of parallel, 20 cm-spaced rectifier grilles to achieve uniform flow, resulting in a gas cross-sectional velocity uniformity of over 95%. A variable frequency fan then adjusted the gas velocity to 2 m / s. Simultaneously, a temperature and humidity control module combining atomization humidification and fan humidification precisely controlled the relative humidity at 60%, resulting in pre-treated gas.

[0027] First-stage pre-oxidation activation: The pretreated gas is introduced from the bottom inlet of the reaction tower and evenly distributed through a porous gas distribution plate with an opening ratio of 25%. It then rises evenly along the cross-section of the reaction tower into the pre-oxidation activation zone. This zone is equipped with an air-cooled plate ozone generator and an ultraviolet activation module. Ozone is continuously added at a dosage of 10g / h through the plate ozone generator and activated by an 80W ultraviolet activation module to generate highly oxidizing active free radicals. The gas flows countercurrently in a three-stage baffle channel to fully contact and react with the active free radicals for 2 seconds, completing the initial degradation of easily oxidized components such as H2S and NH3, and obtaining the pre-oxidized gas.

[0028] Secondary deep ozone oxidation: After pre-oxidation, the gas rises directly into the ozone deep oxidation reactor in the middle of the reaction tower. The ozone-enhanced oxidation components are pre-installed and pre-treated in the reactor. First, the airtightness of the three-layer ozone uniform distribution grid is tested. After passing the test, the pipeline and grid are purged for 30 minutes with ozone at a rate of 5g / h by a high-efficiency variable frequency plate ozone replenishment unit to remove internal impurities and residual air. The ozone uniform distribution grid is arranged in layers from bottom to top, with the air distribution holes of adjacent grids staggered at 90°. Arc-shaped airflow baffles with an opening rate of 30% are set between layers to ensure that the gas passes through the high-concentration ozone zone evenly. The ozone contact reaction time of the gas in the reactor is controlled to be 3 seconds. Under normal temperature and pressure conditions and without additional heating and pressurization, the deep oxidation and decomposition of difficult-to-degrade components such as alcohols and VOCs are completed through the strong oxidation effect of high-concentration ozone. The plate ozone replenishment unit finely adjusts the ozone dosage in real time according to the composition of the waste gas to obtain the catalytically oxidized gas.

[0029] Exhaust Gas Purification and Emission: After catalytic oxidation, the gas is sent out from the top outlet of the reaction tower and enters the residual exhaust gas purifier. It is then processed sequentially through a pre-filter, a modified activated carbon adsorption section, and a demister. The pre-filter removes trace pipeline impurities entrained in the gas. The modified activated carbon adsorption section adsorbs residual ozone and incompletely degraded trace pollutants. The demister removes saturated water mist from the gas through baffles, completing deep purification. The purified gas is then sent to an online monitoring pipeline where pollutant concentrations are continuously monitored in real time using a PID detector, a hydrogen sulfide sensor, and an ammonia sensor. The monitoring data is calibrated every 30 minutes using standard gas. After meeting the standards, the gas is discharged into the atmosphere through a 15m high stainless steel exhaust stack.

[0030] Intelligent adaptive control: Online monitoring instruments are installed at both the inlet and outlet of the reaction tower to collect real-time data on exhaust gas concentration, composition, and emissions, and wirelessly transmit this data to the PLC control system. When the H2S concentration at the inlet rises to 80 mg / m³, the system will detect the emissions. 3 When the above conditions are met, the system automatically increases the ozone dosage in the primary pre-oxidation activation zone to 15g / h and the UV activation module power to 100W. At the same time, it adjusts the dosage of the plate ozone replenishment unit in the secondary deep ozone oxidation zone to 8g / h and adjusts the operating frequency of the variable frequency fan to stabilize the airflow speed, thereby achieving adaptive adjustment of the system's operating conditions and ensuring stable treatment results.

[0031] In summary, this embodiment is applied to the treatment of low-concentration, relatively simple odorous waste gas from wastewater treatment plants. The process parameters are highly matched with actual operating conditions. Testing showed that the removal rates of H2S and NH3 both reached over 99%, and the removal rate of alcohol VOCs reached 98%. The overall footprint of the equipment used in this embodiment is only 8m². 2 Compared to traditional processes, it reduces costs by more than 80%. The process is a non-biological catalytic system, requiring no microbial acclimatization. The start-up time is less than 1 hour, and the treatment effect does not fluctuate significantly in low-temperature winter environments. Routine maintenance only requires monthly checks on the airtightness of the ozone-enhanced oxidation components and the flow status of the ozone distribution grid, and quarterly replacement of the modified activated carbon. It is easy to operate and maintain, low in cost, and fully adaptable to the odor control needs of sewage treatment plants.

[0032] Example 2 This embodiment focuses on the treatment of odorous exhaust gas from urban waste transfer stations, with an exhaust gas volume of 8000 m³ / h. 3 The main components are H2S and NH3, and it also contains a large amount of hydrophobic and recalcitrant VOCs such as fatty acids and benzene compounds, with an H2S concentration of approximately 80 mg / m³. 3 The concentration of NH3 is approximately 120 mg / m³. 3 The concentration of hydrophobic VOCs is approximately 50 mg / m³. 3The concentration of exhaust gas fluctuates dynamically with the amount of waste transferred. The ambient temperature at the site is 10-40℃, and the humidity is high. The advanced catalytic oxidation deodorization method of this invention, by optimizing the configuration of the ozone-enhanced oxidation components and the ozone dosage in each area, strengthens the degradation capacity for hydrophobic and recalcitrant pollutants, while simultaneously achieving dynamic adaptation to fluctuations in exhaust gas concentration. See also... Figure 1 and Figure 2 The specific steps in this embodiment are as follows: Odor Collection and Pretreatment: For the three odor emission points in the waste unloading area and compression area, sealed gas collection hoods made of 304 stainless steel (2mm thick) are installed, along with corrosion-resistant negative pressure collection pipelines to achieve sealed collection. A PLC-linked variable frequency negative pressure fan stabilizes the negative pressure value of the collection pipeline at -80Pa. After large particles and droplets are removed by a plate-type G4 primary filter, the exhaust gas passes through five sets of parallel rectifier grilles spaced 18cm apart to achieve uniform flow, adjusting the gas velocity to 1.8m / s. Then, a heat exchange-type temperature and humidity control module precisely controls the relative humidity of the gas at 65% to prevent high humidity from affecting the catalytic reaction efficiency, thus completing pretreatment.

[0033] First-stage pre-oxidation activation: After the pretreated gas is evenly distributed through a porous gas distribution plate with an opening rate of 20% at the bottom of the reaction tower, it rises into the pre-oxidation activation zone. The dosage of the plate ozone generator unit in this zone is set to 20g / h, and the power of the ultraviolet activation module is adjusted to 120W. Through the synergistic effect of ozone and ultraviolet light, a high concentration of highly oxidizing active free radicals is generated. The gas is fully countercurrently contacted in the 4-stage baffle channel for a contact time of 3s, which initially degrades most of the easily oxidized components such as H2S and NH3, reducing the load of subsequent deep ozone oxidation.

[0034] Secondary deep ozone oxidation: After pre-oxidation, the gas directly enters the ozone deep oxidation reactor in the middle of the reaction tower. The reactor is equipped with an ozone-enhanced oxidation component consisting of 5 layers of uniformly distributed ozone grids. After the grids are tested for air tightness, they are purged with ozone at a rate of 8 g / h for 40 minutes by a plate-type ozone supplementation unit to complete the pretreatment. The uniformly distributed ozone grids are arranged in layers, with arc-shaped airflow baffles with an opening ratio of 25% between the layers. The air distribution holes of the grids are staggered to increase the contact area and contact time between the gas and the high-concentration ozone. The ozone contact reaction time of the gas in the reactor is controlled to be 4 seconds. Under normal temperature and pressure, the hydrophobic VOCs such as fatty acids and benzene series compounds are completely oxidized and decomposed through the synergistic oxidation effect of the primary pre-oxidation active free radicals and the secondary high-concentration ozone. The plate-type ozone supplementation unit dynamically adjusts the ozone dosage based on online detection data.

[0035] Exhaust gas purification and emission: After catalytic oxidation, the gas is sent out from the top of the reaction tower into the residual exhaust gas purifier. After completing filtration, adsorption, and demisting treatment in sequence, it is sent to the online detection pipeline. The pollutant concentration is detected by a high-precision PID detector and a gas chromatograph. The detection data is calibrated with standard gas every 20 minutes to ensure that the pollutant concentration meets the standard. Finally, it is discharged into the atmosphere through a 20m high stainless steel exhaust stack. The exhaust stack is equipped with a flow monitoring device to record the emission data in real time.

[0036] Intelligent adaptive control: The PLC control system performs real-time analysis based on online detection data from the air inlet and outlet. When the concentration of hydrophobic VOCs at the air inlet rises to 80 mg / m³, it will adjust the control accordingly. 3 When the above conditions are met, the ozone dosage in the primary pre-oxidation activation zone is automatically increased to 25 g / h, while the dosage in the plate ozone replenishment unit of the secondary deep ozone oxidation zone is adjusted to 12 g / h. The frequency of the variable frequency fan is also adjusted to stabilize the airflow velocity, ensuring sufficient contact between the gas and the high concentration of ozone, effectively coping with the impact load of the exhaust gas concentration, and avoiding fluctuations in the treatment effect.

[0037] In summary, this embodiment addresses the characteristics of high proportion and large concentration fluctuations of hydrophobic and recalcitrant pollutants in the odorous exhaust gas of waste transfer stations. By increasing the number of ozone distribution grid layers, increasing the ozone dosage in each area, and optimizing the gas ozone contact time, it achieves a removal rate of over 99.5% for H2S and NH3, and a removal rate of over 97% for hydrophobic VOCs. The equipment used in this embodiment occupies only 12m² of floor space. 2 Compared to traditional biological processes, it reduces costs by 75%, starts up quickly (less than 1 hour), and operates stably in the high-temperature and high-humidity environment of waste transfer stations without generating secondary pollution. It completely solves the problems of poor degradation effect of hydrophobic pollutants and weak adaptability to concentration fluctuations in traditional processes.

[0038] Example 3 This embodiment addresses the treatment of odorous waste gas from large-scale livestock and poultry farms, with a waste gas volume of 10,000 m³ / h. 3 / h, NH3 is the main pollutant with a concentration as high as 200 mg / m³. 3 The H2S concentration is approximately 60 mg / m³. 3 The waste gas contains small amounts of alkane VOCs, and its concentration fluctuates significantly with the breeding cycle and manure removal operations. The ambient temperature on-site drops to -10°C in winter and reaches as high as 38°C in summer. The advanced catalytic oxidation deodorization method of this invention, through adjustments to gas collection, control parameters, and equipment protection design, achieves stable operation in low-temperature environments while also meeting the needs for treating high-concentration, highly fluctuating odorous waste gas. See also Figure 1 and Figure 2 The specific steps in this embodiment are as follows: Odor Collection and Pretreatment: For the four odor emission points in the livestock shed, 5mm thick fiberglass sealed gas collection hoods are installed. These hoods are insulated to prevent condensation and are used in conjunction with insulated negative pressure collection pipelines to achieve sealed collection. A variable frequency negative pressure fan maintains the negative pressure in the collection pipelines at a stable -100Pa to prevent odor gas escape. After impurities are removed by a plate-type G4 primary filter, the exhaust gas passes through four sets of parallel rectifier grilles spaced 22cm apart to achieve uniform flow, adjusting the gas velocity to 2.2m / s. Simultaneously, a temperature and humidity control module with defrosting function precisely controls the relative humidity at 70% to prevent condensation at low temperatures from affecting pipeline and equipment operation, thus completing the pretreatment process.

[0039] Primary pre-oxidation activation: The pretreated gas is evenly distributed through a porous gas distribution plate with an opening rate of 30% at the bottom of the reaction tower and then enters the pre-oxidation activation zone. The feed rate of the plate ozone generator is set to 25g / h, and the power of the ultraviolet activation module is 150W. It efficiently generates highly oxidizing active free radicals. The gas is in countercurrent contact for 2.5s in the 3-stage baffle channel, which rapidly and initially degrades high concentrations of NH3 and some H2S, significantly reducing the load of subsequent deep ozone oxidation.

[0040] Secondary deep ozone oxidation: After pre-oxidation, the gas enters an insulated ozone deep oxidation reactor. The reactor is equipped with an ozone-enhanced oxidation component consisting of four layers of uniformly distributed ozone grids. After the grids are tested for air tightness, they are purged with ozone at a rate of 10 g / h for 30 minutes by a plate-type ozone replenishment unit to complete the pretreatment. The uniformly distributed ozone grids are arranged in layers from bottom to top, with an opening rate of 30% for the arc-shaped airflow baffles between the layers. The air distribution holes of the grids are staggered at 90 degrees to control the ozone contact reaction time of the gas in the reactor to 3.5 seconds. Under normal temperature and pressure conditions and without additional heating devices, the remaining recalcitrant components are oxidized and decomposed by the strong oxidation effect of high-concentration ozone. Temperature monitoring instruments and ozone concentration detectors are installed at the reactor outlet to monitor the reaction environment and ozone addition status in real time.

[0041] Exhaust gas purification and emission: After catalytic oxidation, the gas undergoes deep treatment such as filtration, adsorption, and demisting in the residual exhaust gas purifier before being sent to an online detection pipeline with low-temperature protection. The detection instruments are calibrated every 25 minutes using standard gas to ensure detection accuracy in low-temperature environments. After all indicators of the treated exhaust gas meet the standards, it is discharged into the air through an 18m high stainless steel exhaust stack. A condensate collection device is installed at the bottom of the exhaust stack.

[0042] Intelligent adaptive control: The PLC control system monitors the concentration and temperature of exhaust gas at the inlet and outlet in real time, as well as equipment operating parameters. When the exhaust gas concentration surges during the manure cleaning phase of the livestock shed (NH3 concentration exceeds 300 mg / m³), the system will detect any spikes. 3When the ozone concentration in the primary pre-oxidation activation zone is low, the system responds rapidly within 10 seconds, increasing the ozone dosage to 30 g / h and adjusting the UV activation module power to 180 W. Simultaneously, the dosage of the plate ozone replenishment unit in the secondary deep ozone oxidation zone is adjusted to 15 g / h, and the frequency of the variable frequency fan is adjusted to stabilize the airflow, ensuring the gas ozone contact reaction time and achieving stable treatment under impact load. When the ambient temperature drops below 0°C, the system automatically activates the heating device for the pipeline and the ozone deep oxidation reactor to prevent condensation from affecting the flow effect of the ozone distribution grid.

[0043] In summary, this embodiment is applied to the treatment of odorous waste gas from livestock and poultry farms in environments with high concentrations, high fluctuations, and low temperatures. The process requires no additional heating of the reactor, and even at -10℃ in winter, the removal rate of NH3 remains above 99%, H2S above 98.5%, and alkane VOCs above 95%. The treated waste gas indicators meet relevant requirements. The equipment used in this embodiment occupies only 15m² of floor space. 2 Compared to traditional biological filter processes, this technology reduces costs by more than 80%, with a startup time of only 30 minutes. The process is a non-biological catalytic system, requiring no microbial acclimatization or nutrient replenishment. Routine maintenance only requires checking the airtightness of the ozone-enhanced oxidation components and the operating status of the plate ozone generator every 6 months, and replacing the modified activated carbon every quarter. This significantly reduces the maintenance costs and professional requirements for odor control in the aquaculture industry, and completely solves the industry pain points of low winter treatment efficiency and poor adaptability to high-concentration shock loads in traditional processes.

[0044] Comparative Example 1 This comparative example and Example 1 both involve the treatment of odorous waste gas from the biological treatment tank and sludge dewatering room of the same urban wastewater treatment plant. The mainstream biological trickling filtration deodorization process in the industry is adopted. The exhaust gas volume, pollutant composition, concentration, and on-site environmental conditions are completely consistent with Example 1. The specific process is as follows: odorous waste gas from the biological treatment tank and sludge dewatering room of the wastewater treatment plant is collected by a fiberglass gas collection hood, then first passes through a spray scrubbing tower to remove large particulate dust and adjust the relative humidity of the gas to above 90%. It is then sent to a biological trickling filter tower with built-in polypropylene multi-faceted hollow sphere packing. The tower contains a domesticated deodorizing composite microbial community. Nutrient solution is continuously sprayed onto the packing layer through a circulating spray system to maintain the microbial growth environment. The waste gas passes through the packing layer from bottom to top, fully contacting the biofilm. The degradation of odorous pollutants is completed through the metabolic action of the microorganisms. After treatment, the gas is demisted and discharged through a 15m high exhaust stack.

[0045] During the initial stage of this process, the composite microbial community needs to be inoculated, acclimatized, and maintained. The acclimatization period is 2 weeks. Only after the microbial community has stabilized its biofilm and reached the required activity level can the designed treatment effect be achieved. During operation, the pH value of the circulating liquid needs to be continuously monitored (maintained at 6.5-7.5) and the temperature of the packing layer (maintained at 15-30℃). Nutrient solution and trace elements should be added daily, microbial community activity should be tested weekly, and the packing layer should be backwashed every 2 months to prevent packing blockage and caking. In low-temperature environments during winter, the circulating spray liquid needs to be heated to ensure that the temperature of the packing layer is not lower than 15℃, otherwise the microbial activity will decrease significantly.

[0046] This comparative example uses the mainstream biological trickling filter process in wastewater treatment plants, but it has several technical shortcomings in actual operation: the process start-up cycle is long, and the two-week incubation period for the microorganisms cannot meet the emergency deodorization needs of wastewater treatment plants; in low-temperature winter environments, even with heating of the circulating liquid, the temperature at the edge of the packing layer is still difficult to reach the standard, resulting in decreased microbial activity, with H2S removal rate at only 85%, NH3 removal rate at 88%, and alcohol VOCs removal rate at less than 60%; the overall footprint of the biological trickling filter tower + spray scrubbing tower is 42m². 2 The cost is more than five times that of Example 1, and the investment cost of civil engineering and equipment is significantly higher. When the concentration of odorous gas rises sharply due to fluctuations in the influent water quality, the microorganisms are easily affected and become inactive, resulting in a large fluctuation in the treatment effect. It is necessary to shut down the machine for 1-2 weeks to restore its activity. Daily operation and maintenance requires professional personnel to continuously monitor the status of the microbial community, prepare and replenish nutrient solution daily, and backwash the packing regularly. The failed packing needs to be replaced every 18 months. The operation and maintenance workload is large, and the average annual operation and maintenance cost is more than 3.5 times that of Example 1.

[0047] Comparative Example 2 This comparative example and Example 2 both involve the treatment of odorous waste gas from the same urban waste transfer station. The process employs a traditional chemical absorption spray tower combined with granular activated carbon physical adsorption for deodorization. The waste gas volume, pollutant composition, concentration, and site environment are completely identical to those in Example 2. Specifically, the odorous waste gas from the waste transfer station is collected by a simple gas collection hood and then fed into a two-stage chemical absorption spray tower. The first stage uses sodium hydroxide solution to absorb acidic odorous components such as H2S and fatty acids, while the second stage uses dilute sulfuric acid solution to absorb alkaline components such as NH3. The waste gas from the spray tower outlet is then fed into an adsorption tower filled with ordinary granular activated carbon for physical adsorption treatment. The treated gas is then directly discharged through a 20m high exhaust stack.

[0048] The process has significant drawbacks: chemical absorption requires continuous preparation and replenishment of acid and alkali absorbent solutions, generating high-concentration saline wastewater daily, necessitating a wastewater treatment system and causing significant secondary pollution; ordinary granular activated carbon has extremely low adsorption capacity for hydrophobic benzene compounds, with a saturation period of only 7-10 days, requiring frequent replacement and resulting in substantial packing material loss; the spray tower is prone to scaling and clogging, requiring manual cleaning of the tower and spray nozzles weekly, leading to a large workload for operation and maintenance; when the waste gas concentration fluctuates, the acid and alkali absorbent solution ratio cannot be quickly adjusted, causing a sharp drop in treatment efficiency; and to ensure effective gas-liquid contact, the tower volume needs to be increased, resulting in a large equipment footprint.

[0049] Actual operating results: The removal rate of H2S and NH3 is approximately 90%, while the removal rate of hydrophobic VOCs is only 65%, which is insufficient to meet high emission standards. The process does not require microbial acclimatization, but the spray and adsorption systems require two days for commissioning, resulting in slow emergency response. The total equipment footprint is 30m². 2 It is 2.5 times that of Example 2; the average annual operation and maintenance cost is 3 times that of Example 2, and it generates two types of hazardous waste, wastewater and waste activated carbon, resulting in high environmental compliance risks.

[0050] Comparative Example 3 This comparative example and Example 3 both involve the treatment of odorous waste gas from the same scale of livestock and poultry farm. The mainstream biological filter deodorization process in the industry is adopted. The waste gas volume, pollutant composition, concentration and site environment are completely consistent with Example 3. The specific process is as follows: the odorous waste gas from the livestock and poultry farm is collected by a simple sheet metal gas collection device, and the gas humidity is adjusted to 85% by atomization and humidification through a spray tower. Then it is sent into a large biological filter filled with biological ceramic particles. The microbial community in the filter degrades the odorous pollutants. After treatment, the gas is directly discharged through an 18m high exhaust stack.

[0051] During the operation of the filter bed, nutrient solution needs to be sprayed onto the packing layer regularly, the growth status of the microbial community needs to be continuously monitored, and nutrients such as carbon and nitrogen sources need to be replenished. During the start-up phase of this process, the microbial community needs to be acclimatized and maintained for 3 weeks. The designed treatment effect can only be achieved after the activity of the microbial community is stable. In the low-temperature environment of winter, the biological filter bed needs to be heated by steam to maintain the temperature inside the filter bed above 15°C, otherwise the activity of the microbial community will be greatly reduced. When the concentration of exhaust gas rises sharply, the air intake needs to be stopped and highly active microbial community and nutrient solution need to be added to the filter bed. Operation can be resumed after the microbial community recovers.

[0052] This comparative example uses a traditional biological deodorization process to treat odorous waste gas from livestock and poultry farms. However, in actual operation, it revealed several technical bottlenecks: the process start-up cycle is long, and the 3-week acclimatization period for the microorganisms cannot meet emergency deodorization needs; even with simple heating in low-temperature winter environments, the activity of the microbial community still decreases significantly, with an NH3 removal rate of only 82% and an H2S removal rate of 80%, and almost no degradation effect on small amounts of hydrophobic alkane VOCs; the entire biological filter occupies an area of ​​80m². 2The cost of civil engineering and filler material is more than five times that of Example 3. When there is a surge in exhaust gas concentration during the manure cleaning stage of the livestock shed, the microbial community is easily deactivated, and the treatment effect fluctuates greatly, requiring a 3-5 day shutdown for maintenance to recover. Daily operation and maintenance requires professional personnel to continuously monitor the microbial community status, replenish nutrient solution weekly, and replace the failed biological ceramic filler every 3 months. The operation and maintenance is difficult and the average annual operation and maintenance cost is more than four times that of Example 3. The treatment effect, environmental adaptability, and ease of operation and maintenance of this process cannot meet the current high-standard, low-cost odor control needs of the livestock and poultry farming industry. Comparison Projects Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Application scenarios sewage treatment plant garbage transfer station Livestock and poultry breeding houses sewage treatment plant garbage transfer station Livestock and poultry breeding houses Equipment floor area <![CDATA[8m 2 ]]> <![CDATA[12m 2 ]]> <![CDATA[15m 2 ]]> <![CDATA[42m 2 ]]> <![CDATA[30m 2 ]]> <![CDATA[80m 2 ]]> Process start-up time ＜1h ＜1h 30min 2 weeks 2 days 3 weeks Low temperature treatment effect excellent excellent excellent Difference good Difference Removal efficiency of recalcitrant / hydrophobic pollutants good excellent good Difference Difference Difference Shock load adaptability good excellent excellent Difference Difference Difference Daily maintenance difficulty Low Low Low high high high <![CDATA[H2S comprehensive removal rate]]> More than 99% More than 99.5% More than 98.5% 85% 90% 80% <![CDATA[NH3 comprehensive removal rate]]> More than 99% More than 99.5% More than 99% 88% 90% 82% VOCs comprehensive removal rate 98% More than 97% More than 95% Low Low Extremely low Annual operating and maintenance costs Low middle middle high high high

[0053] As can be seen from the comparison table above, Examples 1, 2, and 3, employing the advanced catalytic oxidation deodorization method of this invention, achieve core advantages such as efficient degradation of multi-component odors, small equipment footprint, rapid start-up, strong environmental adaptability, and low operation and maintenance costs by customizing process parameters for three typical odor emission scenarios: wastewater treatment, waste transfer, and livestock and poultry farming. Comparative Example 1, using the mainstream biological trickling filtration process in wastewater treatment plants, suffers from drawbacks such as long start-up cycles, significant efficiency degradation at low temperatures, weak removal capacity for recalcitrant VOCs, large footprint, and complex and costly operation and maintenance. Comparative Example 2, using the traditional chemical absorption + physical adsorption process, while faster than biological processes, still suffers from problems such as poor removal of hydrophobic pollutants, weak adaptability to shock loads, secondary pollution from wastewater / waste activated carbon, rapid activated carbon loss, high operation and maintenance costs, and a relatively large footprint. Comparative Example 3, using the mainstream biological filter process in the livestock and poultry farming industry, suffers from fatal drawbacks such as long start-up cycles, drastic efficiency drops at low temperatures, poor removal of recalcitrant pollutants, easy deactivation under shock loads, complex and costly operation and maintenance, and extremely large footprint.

[0054] This invention's process, through staged pre-oxidation + deep ozone oxidation coupling + intelligent adaptive control, completely breaks through the bottlenecks of traditional processes: the equipment occupies only 15%-20% of the area of ​​traditional biological processes and less than 40% of chemical absorption + adsorption processes; the start-up time is shortened to within 1 hour, enabling rapid response to emergency deodorization; the non-biological catalytic system is unaffected by temperature and pH, and the treatment effect does not decrease under low temperature / high humidity conditions; the removal rate of recalcitrant hydrophobic VOCs reaches over 95%, far superior to traditional processes; intelligent control can respond to concentration shocks in real time, ensuring stable operation without fluctuations; there is no sterile strain domestication, no acid or alkali waste liquid, and no frequent packing replacement, significantly reducing the difficulty of operation and maintenance and the total life cycle cost, and there is no secondary pollution. It can be fully adapted to odor control scenarios in multiple industries, and its engineering application value is far higher than that of traditional deodorization processes.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An advanced catalytic oxidative deodorization process characterized in that, The method includes the following steps: S1. Odor Collection and Pretreatment: The malodorous gases generated by the pollution source are collected in a closed system to remove large particulate dust and suspended droplets from the gas, and the gas flow rate and relative humidity are adjusted to obtain pretreated gas. S2, Primary Pre-oxidation Activation: The pretreated gas is sent into the reaction tower and, after uniform gas distribution, enters the pre-oxidation activation zone to generate highly oxidizing active free radicals, which fully contact and react with the odorous gas to complete the initial degradation of easily oxidized odorous components and obtain the pre-oxidized gas. S3, Secondary Deep Ozone Oxidation: The pre-oxidized gas is sent into the ozone deep oxidation reactor. Through the ozone-enhanced oxidation components installed in the reactor, the recalcitrant odor components are decomposed by deep ozone oxidation at room temperature and pressure to obtain the catalytically oxidized gas. S4. Exhaust gas purification and emission: The gas after catalytic oxidation is sent to the residual exhaust gas purifier to remove trace pollutants and residual oxidants. After passing the test, it is discharged through the exhaust pipe.

2. The method of claim 1, wherein the method is a method of advanced catalytic oxidative deodorization. In step S1, a sealed gas collection hood matched one-to-one with the pollution source location is used in conjunction with a negative pressure collection pipeline to complete the sealed collection of odorous gas. During the collection process, the negative pressure value in the collection pipeline is kept stable. First, a primary filter module removes large particles of dust and suspended droplets with a particle size greater than 10 μm from the gas. Then, a rectifier module is used to uniformly flow the gas and adjust the uniformity of the gas cross-sectional flow velocity. After that, the gas flow velocity is adjusted to a set range. At the same time, the relative humidity of the gas is adjusted to a set range through a temperature and humidity control module to complete the pretreatment of the odorous gas.

3. The method of claim 2, wherein the method is an advanced catalytic oxidative deodorization method. In step S1, the sealed gas collection hood is made of fiberglass or stainless steel. The coverage area of ​​the gas collection hood completely covers the odor emission point of the pollution source. The negative pressure value in the collection pipeline is matched and set according to the emission amount of the pollution source. The primary filter module adopts a plate primary filter with filtration accuracy matched to the dust particle size in the gas. The rectifier module adopts multiple sets of parallel rectifier grids with the spacing of the rectifier grids matched to the gas flow rate. After the gas is uniformly treated, the flow rate and relative humidity are adjusted.

4. The method of claim 1, wherein the method is a method of advanced catalytic oxidative deodorization. In step S2, the pretreated gas is introduced into the reaction tower through the inlet at the bottom of the reaction tower. It is first uniformly distributed by the porous gas distribution plate at the bottom of the reaction tower, so that the gas rises evenly along the cross-section of the reaction tower and enters the pre-oxidation activation zone. Ozone oxidant is added by the plate ozone generating unit in the pre-oxidation activation zone, and the ozone is activated by the ultraviolet activation module to generate strong oxidizing active free radicals. The gas flows along the baffle channel in the pre-oxidation activation zone and comes into full countercurrent contact with the active free radicals to complete the initial degradation of easily oxidized odor components.

5. The advanced catalytic oxidation deodorization method according to claim 1, characterized in that, In step S3, the ozone-enhanced oxidation component in the ozone deep oxidation reactor consists of an ozone uniform distribution grid and a plate-type ozone replenishment unit. The ozone uniform distribution grid has a corrosion-resistant porous structure, and its air inlet end is sealed to the plate-type ozone replenishment unit. The plate-type ozone replenishment unit is a high-concentration plate-type ozone generating module, which can adjust the ozone dosage in real time according to the content of the recalcitrant odor components. The ozone-enhanced oxidation component is fixed inside the reactor in a layered arrangement. An airflow baffle is set between two adjacent layers of ozone uniform distribution grids. After pre-oxidation, the gas passes through the ultra-high concentration ozone zone formed by each layer of ozone uniform distribution grid in sequence, and fully contacts the high-concentration ozone and the hydroxyl radicals generated in situ, simultaneously completing strong catalytic oxidation and deep deodorization decomposition.

6. The advanced catalytic oxidation deodorization method according to claim 5, characterized in that, In step S3, before the ozone-enhanced oxidation component is installed into the ozone deep oxidation reactor, the airtightness of the ozone uniform distribution grid is tested. At the same time, ozone is purged through the plate ozone replenishment unit to remove internal impurities and residual air. After the pretreatment is completed, the multiple layers of ozone uniform distribution grid are fixed in the fixed frame of the reactor from bottom to top. The airflow baffle between each layer of ozone uniform distribution grid adopts an arc-shaped baffle structure. The baffle angle of the airflow baffle is matched with the gas flow rate. The air distribution holes of the adjacent two layers of ozone uniform distribution grid are staggered.

7. The advanced catalytic oxidation deodorization method according to claim 1, characterized in that, In step S3, the ozone deep oxidation reactor is located in the middle region of the reaction tower. After pre-oxidation, the gas flows upward from the pre-oxidation activation zone and directly enters the ozone deep oxidation reactor. The flow direction of the gas in the reactor is opposite to the gas distribution direction of the ozone distribution grid, which improves the gas-liquid contact efficiency and controls the ozone contact reaction time of the gas in the reactor within a set range. The entire reaction process is carried out under normal temperature and pressure, without the need for additional heating or pressurization of the gas, thus completing the deep ozone oxidation and decomposition of the recalcitrant odor components.

8. The advanced catalytic oxidation deodorization method according to claim 1, characterized in that, In step S4, the gas after catalytic oxidation is sent out from the top outlet of the reaction tower and into the residual exhaust gas purifier. The residual exhaust gas purifier is equipped with a primary filter section, a modified activated carbon adsorption section and a demisting section in sequence. The gas passes through the primary filter section, the modified activated carbon adsorption section and the demisting section in sequence. First, the primary filter section removes the trace amount of filler dust entrained in the gas. Then, the modified activated carbon adsorption section removes the trace pollutants and residual oxidant in the gas. Finally, the demisting section removes the saturated water mist in the gas, thus completing the deep purification treatment of the exhaust gas.

9. The advanced catalytic oxidation deodorization method according to claim 8, characterized in that, In step S4, the gas treated by the residual exhaust gas purifier is first sent into the detection pipeline of the online detection instrument. The online detection instrument continuously and in real time detects the concentration of various pollutants in the gas. During the detection process, data calibration is completed at the set time interval. After the detection is completed, the gas is sent into a stainless steel exhaust stack. The height of the exhaust stack is set according to the emission standards of the corresponding industry. The gas is discharged at high altitude through the exhaust stack.

10. The advanced catalytic oxidation deodorization method according to claim 1, characterized in that, The method also includes step S5, intelligent adaptive control, in which online detection instruments are installed at the inlet and outlet of the reaction tower respectively. The online detection instruments collect data on the concentration and composition of odorous gas at the inlet and pollutant emission data at the outlet in real time. The collected data is transmitted to the PLC control system in real time. Based on the received data, the PLC control system adjusts the operating frequency of the variable frequency fan in the collection pipeline, the output power of the plate ozone generator module in the pre-oxidation activation zone, the dosage of high-concentration ozone, and the operating power of the ultraviolet activation module in a coordinated manner to complete the adaptive adjustment of the system's operating conditions.

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