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SNCR and SCR Flue Gas Denitrification Systems with Selective Non-Catalytic Reduction and Selective Catalytic Reduction for 850℃ ~ 1050℃ Temperature Window
SNCR and SCR Flue Gas Denitrification Systems with Selective Non-Catalytic Reduction and Selective Catalytic Reduction for 850℃ ~ 1050℃ Temperature Window
Specifications
Temperature window :
850℃ ~ 1050℃
Catalyst requirement :
Required for SCR, not for SNCR
Reducing agents :
Ammonia water, urea
Denitrification technology :
SNCR & SCR
Byproduct risk :
Ammonia oxidation to NOx at excessive temperatures
Main reaction equations :
4NH₃+4NO+O₂->4Nz+6H₂O, CO(NH₂)₂->2NHz+CONH₂+NO->Nz+H₂O2NO+2CO->Nz+2CO₂
Description
SNCR & SCR Flue Gas Denitrification
SNCR (Selective Non-Catalytic Reduction)

Selective Non-Catalytic Reduction (SNCR) flue gas denitrification stands as the mainstream denitrification technology widely adopted for fluidized bed boilers, cement kilns, and waste incineration furnaces.

This process works by injecting ammonia water, urea, or other reducing agents into flue gas within the temperature window of 850℃ to 1050℃. Without any catalyst, amine-based reducing agents selectively react with nitrogen oxides (NOx) contained in flue gas and convert pollutants into harmless nitrogen (N₂) and water (H₂O).

Main Chemical Reaction Equations
Using ammonia as reducing agent:
4NH₃ + 4NO + O₂ → 4N₂ + 6H₂O
Using urea as reducing agent:
CO(NH₂)₂ → 2NH₂ + CONH₂ + NO → N₂ + H₂O
2NO + 2CO → N₂ + 2CO₂
Important Note: If the flue gas temperature exceeds the optimal range excessively, ammonia will be oxidized to generate new nitrogen oxides instead:
4NH₃ + 5O₂ → 4NO + 6H₂O

SNCR denitrification technology boasts broad application scenarios, covering cement production, municipal waste incineration, glass furnaces, thermal power plants, cogeneration units, and central heating boilers.

SCR (Selective Catalytic Reduction)

The working principle of Selective Catalytic Reduction (SCR) denitrification: Under the action of dedicated catalysts, liquid ammonia serving as the reducing agent chemically reacts with nitrogen oxides in flue gas. Hazardous NOx is converted into eco-friendly nitrogen and water to realize thorough flue gas denitrification.

The term "selective" indicates that ammonia (NH₃) only participates in the reduction reaction with nitrogen oxides rather than reacting with oxygen present in flue gas.

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SNCR and SCR Flue Gas Denitrification Systems with Selective Non-Catalytic Reduction and Selective Catalytic Reduction for 850℃ ~ 1050℃ Temperature Window

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Product Detail
Temperature window :
850℃ ~ 1050℃
Catalyst requirement :
Required for SCR, not for SNCR
Reducing agents :
Ammonia water, urea
Denitrification technology :
SNCR & SCR
Byproduct risk :
Ammonia oxidation to NOx at excessive temperatures
Main reaction equations :
4NH₃+4NO+O₂->4Nz+6H₂O, CO(NH₂)₂->2NHz+CONH₂+NO->Nz+H₂O2NO+2CO->Nz+2CO₂
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SNCR and SCR Flue Gas Denitrification Systems with Selective Non-Catalytic Reduction and Selective Catalytic Reduction for 850℃ ~ 1050℃ Temperature Window

Chongqing Huanxiang Industrial. Co., Ltd.

Verified Supplier
1 Years
chongqing, chongqing
Since 2017
Business Type :
Manufacturer
Main Products :
Power Plant Equipment, Power Plant Turbine Parts, Industrial Gas Turbine
Total Annual :
20000000usd-25000000usd
Employee Number :
50~100
Certification Level :
Verified Supplier
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