Ozone-enhanced oxidation and deodorization system based on high-temperature dust-containing tail gas

Abstract

This invention discloses an ozone-enhanced oxidation deodorization system based on high-temperature dusty exhaust gas, belonging to the field of industrial waste gas treatment technology. The system, along the exhaust gas flow direction, sequentially includes a pretreatment unit, an ozone dosing and mixing unit, an oxidation reaction unit, and an ozone safety decomposition unit, and is equipped with a central control system. The pretreatment unit creates suitable conditions for ozone oxidation through cooling and dust removal; the ozone dosing and mixing unit achieves efficient and uniform mixing of ozone and exhaust gas; the oxidation reaction unit provides sufficient residence time and is supplemented by spray absorption to achieve the oxidative decomposition of odorous substances; the ozone safety decomposition unit ensures that unreacted ozone does not escape. This invention, targeting the characteristics of high-temperature dusty exhaust gas from rotary kilns, integrates efficient mixing, enhanced oxidation, and safety control technologies, offering advantages such as high deodorization efficiency, stable operation, no secondary pollution, simple operation and maintenance, and strong modular scalability. It is suitable for the treatment of various industrial high-temperature dusty odorous gases.

Description

Technical Field

[0001] This invention relates to the field of industrial waste gas treatment technology, and more specifically, to an ozone-enhanced oxidation deodorization system based on high-temperature dust-laden exhaust gas. Background Technology

[0002] Rotary kilns, widely used in the incineration and disposal of solid waste, hazardous waste, sludge, and in industries such as building materials and metallurgy, often emit complex odorous pollutants in their exhaust gases during the high-temperature combustion of materials. This is due to incomplete combustion of organic matter, decomposition of sulfur / nitrogen-containing substances, and volatilization of certain components. These odorous substances mainly include reducing sulfur-containing compounds (such as hydrogen sulfide, methanethiol, and ethanethiol), nitrogen-containing compounds (such as ammonia, methylamine, and trimethylamine), and a wide variety of volatile organic compounds (such as benzene compounds, fatty acids, aldehydes, and ketones). These components not only produce unpleasant odors and affect the surrounding environment, but some substances also have certain toxicity and corrosiveness. Direct emissions violate national environmental regulations such as the "Odor Pollutant Emission Standard" (GB14554-93) and the "Integrated Emission Standard for Air Pollutants" (GB16297-1996).

[0003] Currently, technologies for treating industrial odorous gases mainly include physical methods (adsorption, absorption), biological methods (biofilters, biotrickling filters), and chemical methods (combustion, oxidation). However, for the specific target of rotary kiln incineration exhaust gas, existing technologies all have obvious limitations or shortcomings:

[0004] The inapplicability of physical / biological methods: Rotary kiln exhaust gases typically have high temperatures (above 120°C) and contain a certain amount of dust. High temperatures significantly reduce the adsorption capacity of the adsorbent, causing microorganisms in biological methods to become inactive or even die; while dust can clog the pores of the adsorbent or the packing material of the biofilter bed, leading to a sharp increase in system pressure drop, a sudden drop in efficiency, or even failure to operate normally. Therefore, physical and biological methods usually require complex and expensive pretreatment (such as deep cooling and multi-stage dust removal) to be applicable, resulting in poor economic efficiency and reliability.

[0005] Economic issues with thermal / catalytic combustion: While high-temperature incineration is a thorough deodorization method, the concentration of odorous substances in the exhaust gas from a rotary kiln is usually significantly reduced after the main combustion process, but it still does not meet emission standards. Reheating the cooled exhaust gas to the combustion temperature (typically >600℃) is extremely energy-intensive and expensive. Catalytic combustion can lower the reaction temperature, but the catalyst is easily poisoned, deactivated, or clogged by dust, sulfur, halogens, and other substances in the exhaust gas, requiring frequent and costly maintenance.

[0006] Limitations of conventional oxidation methods: Chemical washing is effective for some water-soluble odorous substances (such as H2S and NH3), but its removal efficiency for large amounts of hydrophobic VOCs is limited, and it generates high-salt wastewater, leading to secondary pollution problems. Low-temperature plasma and photocatalysis technologies, when treating complex, high-concentration mixed odorous gases, suffer from unstable treatment efficiency, uncertain byproducts, and difficulties in equipment scale-up.

[0007] Ozone (O3), as a strong oxidant (with an oxidation-reduction potential as high as 2.07V), can effectively oxidize and decompose most malodorous molecules, converting them into harmless or low-harm substances such as CO2, H2O, sulfates, and nitrates. Furthermore, excess ozone can decompose into oxygen on its own, posing no risk of secondary pollution. It is considered a highly promising advanced oxidation deodorization technology. However, directly applying ozone oxidation technology to the high-temperature dust-laden exhaust gas of rotary kilns faces a series of technical challenges:

[0008] Ozone is unstable at high temperatures, and its half-life shortens sharply with increasing temperature. Excessively high exhaust temperatures (e.g., >60℃) will significantly accelerate the self-decomposition of ozone, resulting in insufficient effective oxidant dosage and decreased deodorization efficiency.

[0009] Dust particles in exhaust gas can adsorb odor molecules and ozone, hindering gas-to-gas mass transfer and reactions; at the same time, dust may deposit inside the equipment, affecting flow and mixing uniformity.

[0010] Both ozone and malodorous gases exist in the gaseous phase, and rapid and uniform mixing of the two is a prerequisite for efficient reaction. Achieving thorough mixing of large-scale gas flows within a limited duct space is a challenge in engineering design.

[0011] If the reaction is insufficient or no elimination measures are implemented, the unreacted ozone will be released into the atmosphere, becoming a pollutant in itself (concentration limit ≤ 0.16 mg / m³), causing secondary pollution.

[0012] A complete system integrating pretreatment, efficient mixing, full reaction, and safety assurance is needed to adapt to the fluctuating flow, temperature, and concentration of exhaust gas in rotary kilns.

[0013] Therefore, we have made improvements and proposed an ozone-enhanced oxidation deodorization system based on high-temperature dust-laden exhaust gas. Summary of the Invention

[0014] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an ozone-enhanced oxidation deodorization system based on high-temperature dusty exhaust gas. This system is specifically designed for the characteristics of rotary kiln combustion exhaust gas: high temperature, dust content, complex and fluctuating concentrations of odorous components. Through an integrated and modular design of precise pretreatment, efficient mixing, enhanced oxidation, and safe decomposition, it achieves efficient and stable removal of odorous pollutants while ensuring safe and reliable system operation, no secondary pollution, and simple operation and maintenance.

[0015] To achieve the above objectives, the present invention adopts the following technical solution:

[0016] An ozone-enhanced oxidation deodorization system based on high-temperature dusty exhaust gas includes, in sequence along the exhaust gas flow direction, a pretreatment unit, an ozone dosing and mixing unit, an oxidation reaction unit, and an ozone safe decomposition unit connected by pipelines; the system is also equipped with a central control system.

[0017] The pretreatment unit includes a cooling heat exchanger and a high-efficiency dust collector connected in sequence, used to adjust the high-temperature dust-laden exhaust gas discharged from the rotary kiln to suitable working conditions for ozone oxidation.

[0018] The ozone dosing and mixing unit includes an ozone generator and a Venturi mixer and a static mixer arranged in sequence; the outlet of the ozone generator is connected to the ozone intake port of the Venturi mixer.

[0019] The oxidation reaction unit is a vertical tower structure with a tail gas outlet at the top and a tail gas inlet at the bottom, which is connected to the outlet of the static mixer. The upper and middle parts of the tower are equipped with a multi-layer spray device.

[0020] The ozone safety decomposition unit is a catalytic ozone decomposer, and its inlet is connected to the tail gas outlet of the oxidation reaction unit.

[0021] The central control system is electrically connected to the ozone generator, the spraying device, and the temperature and pressure sensors and ozone concentration monitors installed at key nodes of the system.

[0022] Furthermore, the cooling heat exchanger is a shell-and-tube or plate heat exchanger made of 304 stainless steel, and its cooling capacity is designed to reduce the exhaust gas with an inlet temperature range of 60-120℃ to 40-60℃.

[0023] Furthermore, the high-efficiency dust collector is a bag filter with a PTFE membrane filter bag, with a filtration accuracy of not less than 1μm, a dust removal rate of not less than 95%, and a 20% margin for the processing air volume.

[0024] Furthermore, the ozone generator is an ozone generator that uses oxygen with a purity of ≥93% as a gas source, and the ozone concentration it produces is not less than 80mg / L; the ozone dosage is dynamically adjusted according to the inlet odor concentration, ranging from 30-80mg / m³.

[0025] Furthermore, the throat design of the Venturi mixer generates negative pressure to draw in and initially mix ozone and exhaust gas; the static mixer is equipped with at least three layers of spiral or grid-shaped turbulence units to achieve a mixing uniformity of over 95% between ozone and exhaust gas.

[0026] Furthermore, the tower body of the oxidation reaction unit is made of ozone-resistant 316L stainless steel, and the tower body design ensures that the residence time of the exhaust gas in the tower is not less than 2.5 seconds; the multi-layer spraying device sprays a weakly alkaline absorbent liquid with a pH value controlled at 8-10, which is used to absorb the acidic products generated by the oxidation reaction.

[0027] Furthermore, the catalytic ozone decomposer is filled with an ozone decomposition catalyst with MnO2 as the main active component, and the decomposition efficiency of excess ozone is not less than 99% at an operating temperature of 40-80℃.

[0028] Furthermore, the system also includes an emergency cooling bypass connected before the pretreatment unit and / or an air separation oxygen generation module or a liquid oxygenation module connected before the ozone generator intake.

[0029] Furthermore, the central control system dynamically adjusts the output of the ozone generator based on feedback signals from online monitoring instruments for odor concentration or key malodorous components (such as H2S) located at the inlet and / or outlet of the oxidation reaction unit.

[0030] Furthermore, each unit of the system adopts a modular design, which can be combined and expanded according to different processing air volumes (5000-50000m³ / h).

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. The pretreatment unit effectively reduces the exhaust gas temperature and removes dust, creating an ideal reaction environment for efficient and stable ozone oxidation, overcoming the bottlenecks of ozone deactivation at high temperatures and dust interference.

[0033] 2. Employing a two-stage high-efficiency mixing technology combining Venturi and static methods ensures that ozone and odorous gases achieve molecular-level uniform mixing in a very short time, laying the foundation for rapid oxidation reactions. With optimized reaction residence time, odorous substances fully contact and react with ozone, resulting in high comprehensive removal rates for typical odorous components such as H2S, NH3, and VOCs, and strong resistance to concentration fluctuations.

[0034] 3. The main end products of the reaction are harmless CO2, H2O, and inorganic salts. The specially designed catalytic ozone decomposition unit can completely eliminate unreacted excess ozone, ensuring that the ozone concentration at the outlet is far below the national emission limit, thus preventing secondary pollution caused by ozone escape.

[0035] 4. The process integrates pretreatment, ozone generation, mixing, reaction, and safe decomposition into a single unit, resulting in a smooth workflow and a relatively small footprint. Key equipment such as the ozone generator and catalytic decomposer have no moving parts, ensuring high reliability and enabling long-term continuous and stable operation. Attached Figure Description

[0036] Figure 1 A system overall process flow diagram of an ozone-enhanced oxidation deodorization system based on high-temperature dust-laden exhaust gas provided by the present invention;

[0037] Figure 2 The present invention provides a central control system control logic diagram for an ozone-enhanced oxidation deodorization system based on high-temperature dusty exhaust gas.

[0038] The image shows: Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0040] As in the background art, there is the problem that cardboard needs to be stacked before transportation.

[0041] To address this technical problem, the present invention provides an ozone-enhanced oxidation deodorization system based on high-temperature dusty exhaust gas, which is applied to the self-cleaning of the scraper surface during cleaning.

[0042] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0043] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] Example 1: A standard configuration ozone-enhanced oxidation deodorization system

[0046] This embodiment provides a deodorization system for rotary kiln combustion exhaust gas with a processing air volume of 10,000 m³ / h.

[0047] The combustion exhaust gas from the rotary kiln (temperature approximately 100℃, containing dust and odorous substances such as H2S, NH3, and VOCs) first enters the pretreatment unit. The exhaust gas first passes through a cooling heat exchanger 1, where it undergoes indirect heat exchange with cooling water, reducing its temperature from approximately 100℃ to 55℃. The cooled exhaust gas then enters a high-efficiency dust collector 2, where the dust is captured by filter bags, resulting in a purified gas dust content of <10mg / m³.

[0048] The pretreated, clean, medium-temperature exhaust gas enters the ozone dosing and mixing unit. At the throat of the Venturi mixer 3, the high-speed flow of exhaust gas creates negative pressure, drawing in high-concentration ozone gas (85 mg / L) from the ozone generator 4 and achieving preliminary mixing. The pre-mixed gas then enters the static mixer 5, where internal spiral baffles cause intense cutting, rotation, and recombination of the gas, ultimately achieving a highly uniform mixture of ozone and odorous gas (mixing uniformity >96%).

[0049] The uniformly mixed gas enters the oxidation reaction unit, namely oxidation reaction tower 6, from the bottom. The tower is 5m high and 2m in inner diameter, and the tower body is made of 316L stainless steel. The mixed gas flows upward inside the tower, with a residence time of approximately 2.8 seconds. During this process, ozone undergoes a vigorous oxidation reaction with odor molecules. Simultaneously, a three-layer spray system 7 inside the tower sprays a dilute NaOH solution with a pH of 9 downwards. This spray solution has a triple function: (a) absorbing acidic gases such as SO2 and NOx generated in the reaction, and producing salts such as Na2SO4 and NaNO3; (b) wetting the gas and the inner wall of the tower, which helps to capture small particles and some water-soluble substances; and (c) promoting the oxidation reaction of some odor substances through liquid film mass transfer.

[0050] After oxidation and absorption purification, the exhaust gas is discharged from the top of the tower and enters the ozone safety decomposition unit—catalytic ozone decomposer 8. The decomposer is equipped with a MnO2-based catalyst, which efficiently decomposes any unreacted ozone that may remain in the exhaust gas into oxygen at a temperature of about 60°C, with a decomposition efficiency of >99.5%, ensuring that the outlet ozone concentration is below 0.1 mg / m³.

[0051] Finally, the purified gas passes through the exhaust fan. The entire system is monitored by a central control system. Key points of the system are equipped with online monitoring instruments for temperature, pressure, ozone concentration, and odor gas concentration. The data is fed back to the control system to achieve closed-loop regulation of ozone dosage and system safety interlocks.

[0052] Cooling heat exchanger: It adopts a 304 stainless steel shell and tube heat exchanger with a heat exchange area of ​​50m². It is designed to reduce the 120℃ exhaust gas to below 60℃. In actual operation, the outlet temperature is controlled to be 50±5℃ by adjusting the cooling water flow according to the inlet temperature.

[0053] High-efficiency dust collector: It adopts an offline dust collector with PTFE membrane needle-punched felt filter bags, a filtration area of ​​200m², a filtration velocity of 0.8m / min, a designed air volume of 12000m³ / h, and ensures a dust removal efficiency of ≥98% with a filtration accuracy of 1μm.

[0054] Ozone generator: Utilizing an oxygen source (external 93% pure oxygen), this dielectric barrier discharge generator has a rated ozone output of 10 kg / h, an outlet ozone concentration of 85 ± 5 mg / L, and a rated power of approximately 65 kW. Equipped with a frequency converter, the ozone output can be steplessly adjusted within the range of 30%-100%.

[0055] Venturi mixer: Inlet / outlet diameter DN500, throat diameter DN200, made of 304 stainless steel. Depending on the design flow rate, a negative pressure of approximately -3 kPa can be created at the throat, sufficient for stable ozone gas inhalation.

[0056] Static mixer: DN500 diameter, 1.8m length, internally equipped with 6 alternating right-hand and left-hand spiral mixing units, made of 316L stainless steel. Pressure drop approximately 150Pa.

[0057] Oxidation reaction tower: The main body is made of 316L stainless steel with a wall thickness of 6mm. The vertical section of the tower is 5m high, with an inner diameter of 2m and an effective volume of approximately 15.7m³. At an airflow of 10,000m³ / h, the empty tower velocity is approximately 0.88m / s, and the residence time is approximately 2.8 seconds. The spray layer spacing is 1.2m, using spiral solid cone nozzles, achieving 200% spray coverage. A circulating liquid tank and a drain outlet are located at the bottom of the tower.

[0058] Catalytic ozone decomposer: The shell is made of 304 stainless steel, and the interior is a drawer-type catalyst module frame. It is filled with honeycomb MnO2 catalyst with a pore density of 200 cpsi. The design air volume is 12000 m³ / h, the spatial flow rate is about 20000 h⁻¹, and the inlet temperature range is 40-80℃. Under these conditions, the outlet ozone concentration is guaranteed to be <0.16 mg / m³.

[0059] Central control system: Utilizing a PLC as the main control unit, equipped with a touchscreen human-machine interface. The system can switch between automatic and manual modes and features parameter setting, data logging, trend display, fault alarm, and safety interlock shutdown functions.

[0060] Start-up phase: First, turn on the exhaust gas induced draft fan to allow airflow through the entire system. Then, start the cooling water system to ensure the heat exchanger is working. After the pre-treated exhaust gas temperature stabilizes below 60°C, start the ozone generator and gradually increase the ozone output to the set initial value. Simultaneously, start the spray liquid circulation pump. Finally, start the catalytic decomposer heater or confirm it is in standby mode.

[0061] Normal operation control: The central control system compares the real-time measurement values ​​of the online H2S analyzer (or integrated odor concentration monitor) set at the inlet or outlet of the reaction tower with the set target value, and dynamically adjusts the power of the ozone generator through the PID algorithm, thereby changing the ozone dosage and realizing "on-demand dosing", which saves energy to the maximum extent while ensuring the treatment effect.

[0062] Shutdown Phase: First, gradually reduce and shut down the ozone generator. Maintain the induced draft fan and spray system for at least 15-20 minutes to purge and clean any residual ozone and reaction products from the system. Then, sequentially shut down the spray pump, induced draft fan, and other auxiliary equipment. If internal maintenance is required, ensure thorough ventilation and replacement of the relevant piping sections after shutdown, and confirm safety using a portable ozone detector.

[0063] Ozone leakage prevention: Install fixed ozone concentration detectors and alarms near the ozone generator room and mixing unit, with the alarm threshold set at 0.1 mg / m³. An audible and visual alarm is also provided on-site and interlocked with the ventilation system.

[0064] Fire and explosion protection: All electrical equipment is explosion-proof and meets the requirements for use in hazardous areas. The system is designed with grounding and static electricity elimination measures.

[0065] Example 2: System Modification for High-Concentration Halogen Exhaust Gas

[0066] When the materials burned in a rotary kiln contain halogens such as chlorine and fluorine (e.g., PVC plastics, fluorinated sludge), the exhaust gas may contain components such as Cl2, HCl, and HF. These halogenated substances not only corrode equipment but may also react with ozone to generate chlorine free radicals, potentially producing toxic halogenated byproducts.

[0067] Based on the system of this invention, the following enhancements are made:

[0068] Following the high-efficiency dust collector 2 in the pretreatment unit, a halogen removal scrubbing tower is added. This scrubbing tower employs a two-stage spray system. The first stage sprays a dilute alkaline solution (NaOH) primarily to absorb acidic gases such as HCl and HF. The second stage sprays a sodium thiosulfate (Na₂S₂O₃) or sodium sulfite (Na₂SO₃) solution, specifically for the reducing absorption of free chlorine (Cl₂). After halogen removal scrubbing, the concentration of halogen substances in the exhaust gas is reduced to an extremely low level, such as Cl₂ < 1 mg / m³, before entering the subsequent ozone dosing and mixing unit. This effectively protects the selectivity of the ozone oxidation reaction, avoids the formation of toxic halogenated byproducts, and reduces corrosion of subsequent 316L stainless steel equipment. The wastewater from the halogen removal scrubbing tower must be collected and treated separately.

[0069] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Obviously, the embodiments described above are only some embodiments of this invention, not all embodiments. The accompanying drawings show preferred embodiments of this invention, but do not limit the patent scope of this invention. This invention can be implemented in many different forms; on the contrary, the purpose of providing these embodiments is to make the disclosure of this invention more thorough and complete. Although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. An ozone-enhanced oxidative odor removal system based on high-temperature dust-laden tail gas, characterized in that, Along the exhaust gas flow direction, the system includes, in sequence, a pretreatment unit, an ozone dosing and mixing unit, an oxidation reaction unit, and an ozone safe decomposition unit connected by pipelines; the system is also equipped with a central control system. The pretreatment unit includes a cooling heat exchanger and a high-efficiency dust collector connected in sequence. The ozone dosing and mixing unit includes an ozone generator and a Venturi mixer and a static mixer arranged in sequence; the outlet of the ozone generator is connected to the ozone intake port of the Venturi mixer. The oxidation reaction unit is a vertical tower structure with a tail gas outlet at the top and a tail gas inlet at the bottom, which is connected to the outlet of the static mixer. The upper and middle parts of the tower are equipped with a multi-layer spray device. The ozone safety decomposition unit is a catalytic ozone decomposer, and its inlet is connected to the tail gas outlet of the oxidation reaction unit. The central control system is electrically connected to the ozone generator, the spraying device, and the temperature and pressure sensors and ozone concentration monitors installed at key nodes of the system.

2. The ozone-enhanced oxidation and deodorization system based on high-temperature dust-containing tail gas according to claim 1, characterized in that, The cooling heat exchanger is a shell-and-tube or plate heat exchanger made of 304 stainless steel, and its cooling capacity is designed to reduce the inlet temperature of exhaust gas from 60-120℃ to 40-60℃.

3. The ozone-enhanced oxidation deodorization system based on high-temperature dust-laden exhaust gas according to claim 1, characterized in that, The high-efficiency dust collector is a bag filter with a PTFE membrane filter bag, with a filtration accuracy of not less than 1μm, a dust removal rate of not less than 95%, and a 20% margin for the processing air volume.

4. The ozone-enhanced oxidation deodorization system based on high-temperature dust-laden exhaust gas according to claim 1, characterized in that, The ozone generator is an ozone generator that uses oxygen with a purity of ≥93% as a gas source, and the ozone concentration it produces is not less than 80mg / L; the ozone dosage is dynamically adjusted according to the inlet odor concentration, ranging from 30-80mg / m³.

5. The ozone-enhanced oxidation deodorization system based on high-temperature dust-laden exhaust gas according to claim 1, characterized in that, The throat design of the Venturi mixer generates negative pressure to draw in and initially mix ozone and exhaust gas; the static mixer has at least three layers of spiral or grid-shaped turbulence units inside, so that the mixing uniformity of ozone and exhaust gas reaches more than 95%.

6. The ozone-enhanced oxidation deodorization system based on high-temperature dust-laden exhaust gas according to claim 1, characterized in that, The tower body of the oxidation reaction unit is made of ozone-resistant 316L stainless steel, and the tower design ensures that the residence time of the exhaust gas in the tower is no less than 2.5 seconds. The multi-layer spraying device sprays a weakly alkaline absorbent liquid with a pH value controlled at 8-10 to absorb the acidic products generated by the oxidation reaction.

7. The ozone-enhanced oxidation deodorization system based on high-temperature dust-laden exhaust gas according to claim 1, characterized in that, The catalytic ozone decomposer is filled with an ozone decomposition catalyst with MnO2 as the main active component. At an operating temperature of 40-80℃, the decomposition efficiency of excess ozone is not less than 99%.

8. The ozone-enhanced oxidation deodorization system based on high-temperature dust-laden exhaust gas according to claim 1, characterized in that, It also includes an emergency cooling bypass connected before the pretreatment unit and / or an air separation oxygen generation module or a liquid oxygenation module connected before the ozone generator intake.

9. The ozone-enhanced oxidation deodorization system based on high-temperature dust-laden exhaust gas according to claim 1, characterized in that, The central control system dynamically adjusts the output of the ozone generator based on feedback signals from online monitoring instruments for odor concentration or key odor components located at the inlet and / or outlet of the oxidation reaction unit.

10. The ozone-enhanced oxidation deodorization system based on high-temperature dust-laden exhaust gas according to claim 1, characterized in that, The system's various units adopt a modular design, allowing for specification combinations and expansion within the range of 5000-50000 m³ / h to accommodate different air volumes.

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