SCR Denitration Equipment —— A green tool for industrial flue gas denitration

With the rapid development of industry, nitrogen oxide (NOx) emissions have become one of the important sources of air pollution. In order to effectively control the emission of nitrogen oxides, selective catalytic reduction denitration equipment came into being and is widely used in high-pollution industries such as thermal power generation, steel, cement, and chemicals, becoming a key environmental protection equipment for achieving green and sustainable development.
The equipment usually includes:
Reactor body
Catalyst module
Reductant storage and injection system
Control system and heat exchange device
Working principle of SCR denitration
The core of SCR denitration lies in the role of catalyst. The basic reaction process is as follows:
NO + NO₂ + 2NH₃ → 2N₂ + 3H₂O
4NO + 4NH₃ + O₂ → 4N₂ + 6H₂O
The specific process is as follows:
The flue gas enters the SCR reactor after passing through the boiler or combustion equipment;
Ammonia or urea solution is sprayed in front of the catalyst layer;
Nitrogen oxides and ammonia react chemically on the catalyst surface and are converted into nitrogen and water vapor;
The purified flue gas is discharged into the atmosphere through the chimney.
The whole process is carried out in a temperature range of about 300℃ to 400℃ to ensure that the catalyst activity and reaction efficiency are in the best state.
Main advantages of SCR denitration equipment
High denitration efficiency: the denitration rate can reach more than 80%, and some systems even exceed 95%;
Stable and reliable operation: suitable for various fuel types (coal, natural gas, biomass, etc.);
Environmentally friendly: the byproducts are nitrogen and water, which will not cause secondary pollution;
Strong adaptability: can be used with a variety of industrial boilers and kilns;
High degree of automation: equipped with intelligent control system, which is convenient for remote monitoring and adjustment.
Wide application field
SCR Denitration Equipment is mainly used in the following industries:
Thermal power plant: flue gas denitration of coal/gas units;
Steel metallurgy: sintering machine, coke oven flue gas treatment;
Cement building materials: rotary kiln tail gas purification;
Chemical and petrochemical: heating furnace, cracking furnace waste gas treatment;
Waste incineration plant: control the generation of NOx during incineration.
With the increasingly stringent national environmental protection standards and the advancement of the "dual carbon" goals, SCR Denitration Equipment is becoming an indispensable technical means for various industrial enterprises in energy conservation and emission reduction. It not only helps companies meet environmental regulations, but also provides strong technical support for the battle to protect blue skies.
In the future, with the development of new catalyst materials and the application of intelligent control technology, SCR denitrification equipment will continue to optimize in terms of improving efficiency, reducing energy consumption, and extending service life, pushing my country's and even the world's environmental protection industry to a higher level. Choosing an efficient and reliable SCR denitrification system is not only a reflection of the company's fulfillment of social responsibility, but also a key step in protecting green waters and green mountains.