With the improvement of the national environmental protection requirements, the NOx emission indicators in industrial exhaust are increasingly strict, and many places require the implementation of NOx emission concentration < 50mg/Nm³. Therefore, the majority of enterprise devices have environmental protection devices that are difficult to meet the standards, and need to be reformed to meet the new emission standards.
NOx is one of the main causes of acid rain, which has great harm to the environment and human health. In order to reduce the pollution of the atmospheric environment, it is necessary to reduce NOx emissions and protect the ecological environment and human health.
In the combustion process of biomass boiler, due to the high nitrogen content of biomass fuel, a large amount of nitrogen oxides will be produced, in addition, the concentration of NOx in the flue gas of biomass boiler fluctuates relatively large, and it is necessary to stabilize and reduce the emission concentration by denitrification technology.
Biomass boiler denitration, can be SNCR and SCR. SNCR denitration efficiency is low, usually reaching 20% to 40% denitration efficiency, while SCR denitration efficiency can reach more than 90%, and the combined technology can better meet the ultra-low emission requirements.
Biomass boiler denitration is faced with many types of fuel, low caloric value, uniform feed and other technical challenges, these factors will lead to drastic changes in combustion zone temperature, boiler outlet initial nitrogen oxide emission concentration fluctuations, therefore, the need to solve the problem through technological innovation, the need to develop low-temperature catalyst, alkali metal poisoning resistance catalyst, flue gas reheating SCR denitration process.
Although the traditional denitrification technology such as SCR has high denitrification efficiency, the investment and operation cost are high, and the catalyst is dangerous waste, which needs special treatment. Therefore, the development of new denitrification technology can reduce the investment and operation cost, and reduce the generation of secondary pollutants at the same time. The biomass boiler is required by environmental protection regulations to reduce the impact of nitrogen oxides on the environment and health. Improve the denitration efficiency to reduce operating costs and other aspects of consideration.
The SCR denitration system independently developed by Green Valley Environmental Protection has independent intellectual property rights and a number of invention patents, and has accumulated a large amount of experience data in the application field, which can ensure that the project design is reasonable and the operation is stable and reliable. Meet the latest national environmental requirements, ultra-low nitrogen oxide emissions and ammonia escape less than 3ppm requirements. SCR denitrification technology converts NOx in flue gas into harmless nitrogen and water under the action of a certain catalyst, thereby reducing the emission of atmospheric pollutants. It is an efficient and widely used flue gas denitrification technology.
Post time: Jan-07-2025