SCR denitration process
Desulfurization & Denitrification Systems
SCR denitration process
The Activated Carbon + RCO system combines activated carbon adsorption with catalytic combustion technology to efficiently treat volatile organic compounds (VOCs) from various industrial processes. This system offers high purification efficiency, low energy consumption, and stable operation, making it ideal for industries such as painting, printing, chemical, and pharmaceutical.
Key Features
- High adsorption efficiency with advanced activated carbon technology
- Low energy consumption through catalytic combustion process
- Modular design for easy installation and maintenance
- Intelligent control system with automatic operation
- Wide application range for different VOCs concentrations
- Compliance with international environmental standards
1、 Introduction to SCR denitration
SCR (Selective Catalytic Reduction) denitration process adopts liquid ammonia or urea as reducing agent, selectively reacts with nitrogen oxide in flue gas and generates non-toxic and non-polluting nitrogen and water, so as to realize denitration of industrial flue gas.
SCR denitration process is the elimination technology after the generation of nitrogen oxide (NOx), and SNCR denitration process is one of the two major nitrogen oxide control technologies in the world. SCR desulfurization process has low reaction temperature (300-450 ℃), denitration efficiency ≥ 80%, ammonia escape rate ≤ 3ppm, and SO2/SO3conversion rate ≤ 1%. It is a flue gas denitration technology widely used and technically perfect in power plants at home and abroad.
2、 Operating principle of SCR denitration
The flue gas containing nitrogen oxide (NOx) enters the denitration reactor through the economizer. Ammonia gas and diluted air or flue gas are mixed. Under the action of catalyst, ammonia or urea solution and nitrogen oxide have reduction reaction to generate harmless nitrogen and water. At the later stage, the mole ratio of NH3/NOX in the reactor is maintained by adding or replacing new catalyst in the reactor, so as to continuously achieve the required denitration effect.
3、 SCR denitration process flow
Ammonia SCR denitration process:
NO+NO2+2NH3 → 2N2+3H2O
NO+4NH3+O2→4N2+6H2O
NO2+4NH3+O2→3N2+6H2O
Urea SCR denitration process:
NH2CONH2+H2O→2NH3+CO2
NO+4NH3+O2→3N2+6H2O
NO+4NH3→5N2+6H2O
4、 SCR denitration advantages
SCR denitration technology has fast denitration speed, high denitration rate and low ammonia escape;
SCR denitration technology catalyst reaction temperature is low, easy to handle large amount of flue gas, strong processing capacity;
Pihua Technology has designed the control system, which can effectively ensure the stable operation of SCR denitration system.
Applications
Automotive painting workshops
Ideal solution for automotive painting workshops processes requiring efficient VOCs treatment and air pollution control.
Chemical and pharmaceutical production
Ideal solution for chemical and pharmaceutical production processes requiring efficient VOCs treatment and air pollution control.
Printing and packaging industry
Ideal solution for printing and packaging industry processes requiring efficient VOCs treatment and air pollution control.
Electronics manufacturing
Ideal solution for electronics manufacturing processes requiring efficient VOCs treatment and air pollution control.
Food processing and packaging
Ideal solution for food processing and packaging processes requiring efficient VOCs treatment and air pollution control.
Plastic and rubber industry
Ideal solution for plastic and rubber industry processes requiring efficient VOCs treatment and air pollution control.
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