Overview
Denitrification ozone generators are critical components in advanced air pollution control systems, designed to mitigate nitrogen oxides (NOx) from industrial exhaust gases. These devices utilize corona discharge technology to produce ozone, which acts as a strong oxidant to convert insoluble NO into NO2 and N2O5 for subsequent absorption. Modern units are engineered for continuous operation under harsh flue gas conditions, with typical ozone production capacities ranging from 5–200 kg/h. The technology gained prominence after 2010 as stricter emission standards (e.g., China's Ultra-Low Emission policy) necessitated solutions beyond traditional SCR systems. Leading manufacturers like Mitsubishi Electric and Ozonia have developed skid-mounted configurations that integrate seamlessly with existing desulfurization and dust removal equipment.
Structure and Working Principle
A standard system comprises three core modules: the air preparation unit (compressors, dryers), ozone generation chamber with high-frequency power supply (1–3 kHz), and injection lances for flue gas mixing. The heart of the system is the dielectric barrier discharge (DBD) reactor, where oxygen molecules dissociate into atomic oxygen and recombine into O3 under 8–15 kV alternating current. Key design innovations include double-layer stainless steel electrodes with ceramic coatings to prevent arcing, and multi-tube configurations for scalable capacity. The generated ozone is injected upstream of wet scrubbers, where it reacts with NO via the path: NO + O3 → NO2 + O2 → HNO3 (after scrubbing). Typical residence times are 1–3 seconds at 150–200°C flue gas temperatures.
Key Features
High-efficiency models achieve ozone yields of 150–200 g/kWh, with concentrations adjustable between 6–14 wt% to match NOx load variations. Advanced units feature real-time monitoring of ozone output via UV absorption sensors and automatic power adjustment based on CEMS (Continuous Emission Monitoring System) feedback. Durability enhancements include automatic tube cleaning systems to remove nitrogen pentoxide deposits, and redundant cooling circuits maintaining dielectric temperatures below 40°C. Some manufacturers offer hybrid designs combining ozone oxidation with residual ammonia injection for synergistic NOx reduction exceeding 90% efficiency.
Application Areas
Primary applications include coal-fired power plants (especially those burning high-sulfur coal), where ozone generators complement SCR systems during low-load operations. In waste-to-energy plants, they effectively handle fluctuating NOx levels from heterogeneous feedstock combustion. Emerging uses involve glass melting furnaces and chemical process industries with intermittent high-NOx emissions. Regional adoption patterns show strong uptake in East Asia, where space constraints favor compact ozone systems over large SCR reactors. Case studies from Japanese steel mills demonstrate 70% operating cost savings compared to conventional ammonia-based reduction when treating exhausts with 500–800 mg/Nm³ NOx concentrations.
Maintenance and Precautions
Routine maintenance involves quarterly dielectric tube inspections for micro-cracks, with replacement recommended every 3–5 years depending on operating hours. Cooling water quality must be maintained at <10 µS/cm conductivity to prevent mineral scaling. Power supply modules require annual insulation resistance testing due to high-voltage stress. Safety protocols mandate ozone destruct units for tail gas treatment and ATEX-certified leak detectors in generator rooms. Operators should maintain logbooks tracking key parameters: discharge voltage stability, coolant flow rates, and specific energy consumption trends for early fault detection.
B2B Procurement Guide
When evaluating suppliers, verify third-party performance test reports (e.g., SGS-certified ozone output under actual flue gas conditions). Prioritize vendors offering field service teams for installation supervision and operator training. Contract terms should include performance guarantees on NOx removal efficiency (typically ≥85%) with liquidated damages for non-compliance. Total cost of ownership analysis should account for auxiliary power consumption (3–5% of plant electricity), spare part availability (common lead times: 8–12 weeks for custom electrodes), and compatibility with plant DCS systems. For reference, a 50 kg/h system serving a 300 MW unit requires approximately 150 m² installation space.
Related Manufacturers
- 主营：[]
- 主营：除臭杀菌净化器、移动式小型氧发生器、水处理臭氧机、臭氧发生器、水冷式臭氧发生器、小型移动式臭氧发生器、大中型臭氧发生器、大型氧气源臭氧发生器、氧气源臭氧发生器定制、中型臭氧发生器配件、臭氧发生器配件销售厂、大型臭氧发生器、中型臭氧发生器、小型一体化臭氧发生器、大型工业臭氧发生器、维修臭氧发生器团队、一体化小型臭氧发生器、低温脱硝、臭氧机配件换新、负压式臭氧设备、臭氧消毒设备、臭氧机、臭氧机故障检测、空气源净化设备、污水处理
- 主营：v型混合机、一维混合机、二维混合机、臭氧发生器、三维混合机、槽型混合机、螺带混合机、双锥混合机、方锥混合机、真空上料机、对开门洁净烘箱、灭菌烘箱、电热鼓风干燥箱、热风循环烘箱、真空干燥箱、真空干燥机、包衣机、脉冲式平板真空干燥箱、实验室三维混合机、运动混合机、平板真空干燥箱
- 主营：大型臭氧发生器、污水处理臭氧发生器、废气处理臭氧发生器、烟气脱硫脱硝臭氧发生器、自来水净化消毒臭氧发生器、空间杀菌消毒臭氧机
- 主营：臭氧发生器、脱硫脱硝臭氧、大型臭氧发生器、污水处理臭氧发生器、臭氧消毒机、废气处理臭氧
- 主营：臭氧设备定做、臭氧放电管、养殖专用臭氧、臭氧发生器、烟气脱销臭氧发生器、水处理臭氧发生器、臭氧管、消毒杀菌设备、定做泳池臭氧、处理专用臭氧、臭氧杀菌消毒、臭氧消毒设备
- 主营：臭氧发生器
- 主营：臭氧发生器
- 主营：臭氧发生器、臭氧发生器配套产品、臭氧消毒机、污水处理设备、废气处理设备
- 主营：加药装置、次氯酸钠发生器、二氧化氯发生器、臭氧发生器、PAM加药装置、PAC加药装置、缓释消毒器、粉末活性炭投加装置、水消毒设备、污水处理消毒装置
- 主营：焚烧炉、电催化氧化设备、沉淀池、臭氧发生器、加药装置、过滤器、斜管沉淀池、机械过滤器、纤维束过滤器、气浮机、一体化污水处理设备、活性炭吸附塔、厌氧发生塔
- 主营：臭氧发生器
- 主营：PSA制氧机、VPSA制氧机、砂滤罐、臭氧发生器、大型臭氧发生器、小型臭氧发生器、工业级臭氧发生器、80kg臭氧发生器、臭氧发生器维修保养、50kg臭氧发生器、中型臭氧发生器、真空解析制氧设备、PSA制氧设备维修、工业制氧机故障处理、污水处理设备、臭氧催化氧化塔、臭氧机、变压吸附制氧机、石英砂过滤器、高级催化氧化剂、净化脱色设备、池塘臭氧系统
- 主营：紫外线消毒设备、蒸馏水机、自来水AOP反应器、臭氧发生器、AOP高级氧化消毒器、TOC降解器、污废水AOP、中压紫外线消毒器、PVC紫外线消毒器、泳池AOP羟基自由基消毒器、紫外光催化氧化系统、水质在线检测仪、AOT光催化氧化设备
- 主营：臭氧发生器、臭氧发生一体机
- 主营：机械格栅、回转式格栅除污机、中心传动刮泥机、网板格栅、雨水格栅、转鼓式精密过滤器、转鼓格栅、滗水器、带式压滤机、搅拌机、转碟曝气机、叠螺式污泥脱水机、加药装置、纤维转盘过滤器