NOx treatment | The importance of denitrification technology in wide strip steel heating furnace


Release time:

2024-05-25

While the steel industry promotes economic development, it also brings environmental pollution problems. Nitrogen oxides (NOx), as a major air pollutant, have caused serious impacts on human health and ecological environment. As the key equipment in iron and steel production, the flue gas of wide strip steel heating furnace contains high concentration of NOx. The denitrification technology of wide strip steel heating furnace is an important measure to improve environmental pollution.

With the development of social economy and the rapid industrialization process, the iron and steel industry has also brought environmental pollution problems while promoting economic development. Nitrogen oxides (NOx), as a major air pollutant, have caused serious impacts on human health and ecological environment. Therefore, it is very necessary to carry out denitration treatment on the wide strip steel heating furnace, which can reduce the emission of pollutants and promote green sustainable development. As a key equipment in steel production, the flue gas of wide-strip steel heating furnace contains relatively high concentration of NOx, reducing pollutant emissions of wide-strip heating furnace and improving air quality are of great significance for the environmental protection upgrade and green transformation of iron and steel enterprises

Nitrogen oxides (NOx) not only form acid rain, but also chemically react in the atmosphere to produce greenhouse gases such as ozone, which can cause harm to the human respiratory system and increase the risk of cardiovascular disease. It will also exacerbate the greenhouse effect and affect the climate. Therefore, it is necessary to use SCR denitration technology to achieve clean production and protect the environment. The fuel used in the production process of the wide strip steel heating furnace is mainly gas, and the gas will produce a lot of NOx in the combustion process. These flue gas temperatures are usually between 140 and 220 ° C, and the NOx content is generally less than 150mg/m³. Because the flue gas composition is more complex, the temperature fluctuation is relatively large, which brings challenges to the application of our denitration technology.

Selective catalytic reduction SCR is one of the most widely used denitrification technologies, in a certain temperature and catalysis, NOx reduction into nitrogen and water, SCR denitrification efficiency can reach more than 95%, stable operation, suitable for large-scale industrial, power plants, boilers, boilers and other fields of application. The main body of the equipment is not reformed, the thermal efficiency of denitrification is not affected, and the heating furnace can operate stably under the heat load. The emission standard is controlled below 30mg/m³, and there are no hidden dangers and CO exceeding the standard. According to the real-time status of the exhaust gas, the injection amount of urea water (or ammonia water) is accurately controlled by the electronic control system. Achieve a high nitrogen oxide purification rate while preventing ammonia leakage. After the equipment is manufactured, only part of the pipeline needs to be reformed and connected, and the debugging period is short, which does not affect the normal use of the boiler.

The denitration treatment of wide strip steel heating furnace is the key link to realize green development of iron and steel enterprises. With the increasingly strict environmental regulations and the improvement of public awareness of environmental protection, the adoption of efficient, economic and environmentally friendly denitrification technology can not only help enterprises meet emission standards, but also enhance the social image of enterprises and market competitiveness. In the future, we will continue to promote technological innovation, and we are convinced that there will be more efficient and low-cost denitrification technology applied to wide strip steel heating furnaces, contributing to the protection of our blue sky and white clouds.