1. Technical core: ozone low-temperature denitrification - solve the problem of flue gas treatment
Ozone low-temperature denitrification technology uses the strong oxidation of ozone (O₃) to convert insoluble low-valent nitrogen oxides (NO, accounting for more than 95% of the total NOx) into high-valent nitrogen oxides (NO₂, N₂O₅) that are easily soluble in water under low temperature conditions, and then absorbed by the alkali in the absorption tower to achieve efficient removal. The core reaction is as follows:
This technology breaks through the limitations of traditional denitrification technology and has the following advantages:
The reaction rate of O₃ and NOx is fast, and the NOx removal range is 70%~90%, and the maximum can reach 95%, which is suitable for ultra-low NOx and ultra-low emissions. Suitable for new units as well as retrofitting of old systems, it can achieve stable and reliable emission control.
The process is suitable for flue gas temperatures below 200°C, without the need for the high-temperature operating conditions of traditional SCR or SNCR, and is the best denitrification technology under low temperature conditions.
After the ozone reaction, it naturally decomposes into oxygen, and there are no problems such as ammonia escape, catalyst poisoning and blockage in the traditional SCR process.
Ozone denitrification can also achieve the coordinated removal of multiple pollutants such as mercury oxide and VOCs simultaneously. With the wet desulfurization system, a "one-stop flue gas purification" scheme is formed to achieve comprehensive treatment and improve efficiency.
In the boiler start-up and low-load stages, the output can be flexibly adapted to meet the process needs of frequent load fluctuations.
It adopts advanced high-frequency discharge ozone generator and AI intelligent control system to monitor flue gas composition in real time, adjust ozone dosage, achieve dynamic control, achieve precise dosing, and minimize consumption.
The modular design of the equipment covers a small area, is convenient to install, can be quickly installed and integrated, the construction period is short, and the construction period is shortened by more than 50% compared with the traditional SCR, and it can be directly coupled with the existing wet desulfurization tower system (lime gypsum method/magnesium method/seawater desulfurization, etc.).
2. Application scenarios:
Longjing Xinlu ozone low-temperature denitrification technology has been widely used in:
Coal-fired power plants: solve the problem of boiler flue gas NOx emissions and adapt to different unit capacities and working conditions;
Steel sintering/coking: to cope with the complex treatment needs of high temperature and high dust flue gas;
Cement kiln/glass manufacturing: achieve stable denitrification to ensure environmental protection and compliance of the production line;
Waste-to-energy incineration: Collaborative treatment of pollutants such as dioxins and heavy metals to meet ultra-low emission requirements.
