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Home > Applications > In-situ Ammonia measurement in DeNOx

With the latest Neo laser, you can measure directly in the NH3 process. With fast response time / high reliability, this is an ideal solution for NH3 dosing.In-situ Ammonia measurement in DeNOx

PROCESS: 
In power plants NOx reduction, referred to as DeNOx, is typically achieved by selective catalytic reduction (SCR) or selective noncatalytic reduction (SNCR). Ammonia is injected into the gas flow to react with NO to form H2O and N2. The excess ammonia (NH3) in the off gas is called NH3 slip. Ammonia is typically measured after the injection point (1) downstream from the catalysts (SCR). It’s important that the measurement be accurate, fast and reliable. Since ammonia is considered to be toxic, the emission to air is also measured in the stack (2). High sensitivity and high reliability are required. 

TYPICAL PROCESS DATA 
NH3 concentration 0-15 ppm (SCR), 0-50ppm (SNCR) 
H2O content 10 –30% 
Temperature 200-400 °C 
Pressure atmospheric 
Optical path length 1-6 meter

BENEFITS
• Reduce the NOx emission to air. 
• In-situ measurement (no sampling system) 
• Fast response to process changes 
• Easy control of the injection of the NH3 
• Optimize/reduce the NH3 (Urea) consumption 
• Extend lifetime of plant equipment 
• Reduce running costs for plant equipment 
• Low maintenance on plant equipment

Documentation


Application note DeNox Application note DeNox
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Ankersmid engineers, delivers and performs service on analysis equipment, to complete CEM systems and process systems in associated analysis houses. They are used in industrial process technology, laboratories, air force, stable technology and biogas installations

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