NOx treatment | Why do BF pellets need to be reformed for low nitrogen?


Release time:

2024-04-30

In the production process of blast furnace pellets, in order to achieve ultra-low emissions and meet the requirements of environmental protection regulations, the installation of SCR denitration equipment is an effective solution. Green Valley Environmental Protection SCR denitration system is widely used in various main (standby) generator sets, gas turbines, boilers, kilns, heat treatment furnaces, etc., to meet the needs of low nitrogen transformation of blast furnace pellets.

With the rapid development of social economy, people's awareness of environmental protection is gradually enhanced, as well as the state's requirements for air pollution prevention and control, the iron and steel industry as the most important industrial pollution source, its nitrogen oxide (NO x) emissions generated in the production process has been widely concerned. As an indispensable part of the process of iron and steel smelting, the low-nitrogen transformation of blast furnace pellets is an inevitable trend, so do we need to carry out low-nitrogen transformation in the production process of blast furnace pellets?

China has set clear standards for the emission of air pollutants in the iron and steel industry, and put forward strict limits on the concentration of NOx emissions. Low nitrogen transformation of blast furnaces is an important measure for enterprises to comply with environmental regulations, avoid environmental penalties and enhance the image of social responsibility. The combustion process of blast furnace pellets is the main link to produce nitrogen oxides, which are mainly produced in the following key links:

1, in the pellet rotary kiln, it is easy to produce high temperature concentration, resulting in high nitrogen oxide concentration emission data.

2, blast furnace gas and coke oven gas in the combustion process will produce thermal type NOx, in the combustion process will produce high temperature, thus promoting the formation of nitrogen oxides.

3, in the sintering pelletizing process, the nitrogen oxides in the flue gas produce fuel type NOx.

4, in some cases, if the denitrification equipment is not properly operated or the relevant personnel lack experience, it will also lead to an increase in nitrogen oxide emissions.

In order to effectively control nitrogen oxides, we need to use low nitrogen combustion technology, flue gas denitrification process, etc., in the production process of blast furnace pellets, nitrogen oxide (NOx) emissions is an important environmental protection issue, in order to meet environmental requirements, reduce nitrogen oxide emissions, many steel enterprises choose to install selective catalytic reduction (SCR) denitrification equipment, SCR denitrification technology can effectively reduce the emission of nitrogen oxides, and is widely used in many industrial processes such as coke oven, iron and steel sintering, lime kiln, gas boiler, etc. It has the characteristics of high catalytic performance, wide temperature adaptation and high denitrification efficiency.

In the production process of blast furnace pellets, in order to achieve ultra-low emissions and meet the requirements of environmental protection regulations, the installation of SCR denitration equipment is an effective solution. Our company's SCR denitration system has a number of invention patents, and the system and its supporting engineering services are widely used in various types of main (backup) generator sets, gas turbines, boilers, kilns, heat treatment furnaces, etc. There are a large number of successful cases in industrial manufacturing enterprises, power plants, metallurgy, steel, glass, non-ferrous metals, and various heat treatment industries, which can meet the requirements of environmental protection and ultra-low emission of nitrogen oxides in different scenarios and different regions.