Innovation in the steel industry: Efficient denitrification solutions for shaped steel heating furnaces

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The environmental protection upgrading of the steel industry is urgent. As a key link, the nitrogen oxide emission of the shaped steel heating furnace threatens the environmental health. The use of selective catalytic reduction SCR denitrification technology can achieve efficient denitrification, reduce energy consumption and operating costs, and help enterprises achieve green production.

With the acceleration of industrialization, environmental protection has become the focus of global attention, and the steel industry, as a major energy consumption and pollution emissions, is particularly urgent to upgrade its environmental protection. As a key link in steel production, the nitrogen oxides (NOx) emitted by the shaped steel heating furnace pose a serious threat to the environment and human health. Therefore, the development and application of efficient denitration solutions is of great significance for achieving green production.

Section steel is a kind of steel with a certain cross-section shape and size. Section steel heating furnace is widely used in the steel industry, which is used in building structure, bridge, tower, vehicle manufacturing, ship manufacturing, machinery manufacturing and other fields. In the rolling process of section steel, the heating furnace plays a vital role, which is responsible for heating the billet to the temperature suitable for rolling, in order to reduce the rolling force, increase the rolling speed, and improve the structure and performance of the steel. The design and construction of steel heating furnace is also constantly innovating to meet the production needs and environmental requirements, and currently equipped with an independently developed intelligent heating furnace system, through model calculation and combustion optimization control, to achieve accurate control of billet temperature, reduce oxidation burning loss, and improve the yield. However, in the production process, in addition to pollution, it will also have an impact on the environment, energy consumption, product quality and production efficiency.

In the combustion process of the heating furnace, flue gas is produced, including carbon monoxide (CO), sulfur dioxide (SO₂), nitrogen oxides (NOx) and other harmful gases. There may be particles in the flue gas of the heating furnace, which will form dust pollution in the atmosphere and generate a lot of heat during the heating process, which will lead to thermal radiation pollution, and noise will be generated during the operation of the heating furnace, which will cause noise pollution to the surrounding environment. When the flue gas of the steel heater is discharged, It also produces pollutants such as nitrogen oxides (NOx), which are harmful to the environment and human health.

Selective catalytic reduction SCR denitration technology is currently recognized internationally as an efficient denitration technology. Under the action of a catalyst, a reducing agent such as ammonia (NH) or urea is sprayed into the flue gas to chemically react with NOx and form harmless nitrogen (N₂) and water (H₂O) to achieve the effect of denitrification. The automatic operation of SCR denitration system can be realized by using advanced intelligent control system. The system can automatically adjust the operating parameters according to the flue gas analysis data, optimize the denitration effect, and reduce energy consumption. SCR denitrification technology can achieve a denitrification efficiency of more than 97%, significantly reducing NOx emissions, and helping companies easily meet or exceed environmental standards.

We have many successful cases, many customers in the use of our SCR denitrification equipment, nitrogen oxide ultra-low emissions and ammonia escape less than 3ppm requirements, to ensure that the project design is reasonable, stable and reliable operation, our SCR denitrification equipment can also help enterprises reduce energy consumption and operating costs, to achieve economic and environmental double benefits.