The scientific name of denitrification is SCR selective catalytic reduction technology.

 

With high denitration efficiency (70-90%), it is a mature denitration process and the most widely used denitration technology.

It means that nitrogen oxides in flue gas react selectively with reducing agent to generate nitrogen and water, and remove nitrogen oxides (NOx) in flue gas.

The chemical reaction equation of is:

→4NO + 4NH3+O2 → 4N2 +6H2O

→4NO + 4NH3+O2 → 4N2 +6H2O

→6NO2 + 8NH3 + O2  → 7N2 + 12H2O

→6NO2 + 8NH3 + O2  → 7N2 + 12H2O

Process of typical SCR denitration system

 

In SCR denitration system, NOx contained in various waste gases reacts with ammonia water, urea or other substances containing amino groups to generate nitrogen and water.

 

Consideration of denitration route design

The NOx discharged after treatment must meet the national and local environmental protection requirements;

The denitration process should be mature in technology, reliable in equipment operation and have more successful operation performance;

Select the appropriate scheme according to the specific situation of the project to minimize the cost;

The catalyst has good resistance to high-temperature aging, sulfur aging and regeneration.

The pipeline layout of denitration system is reasonable, which can realize the series connection of flue gas denitration system and waste heat device.

The denitration design scheme should be economical and practical, and cooperation with customers is a win-win result.

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