Operation of an SNCR denitrification system (selective non-catalytic reduction)

For gas purification through selective non-catalytic reduction, ammonia or an aqueous urea solution is directly injected behind the combustion chamber at a temperature of 900 to 1100 °C. This causes the nitrogen oxides to react with the ammonium compounds and turn into nitrogen and water. This reduces NOx emissions. At the combustion chamber outlet, the GM32 continuously measures NO, and the GM700 measures NH3 slip. At low NO and CO concentrations, the MCS200HW can also be used for this process application.

  • Following product families can be used
    Measure aggressive gases directly and quickly – even in ATEX zones
    • Direct, fast in-situ measurement
    • No gas sampling, no gas transport, no gas conditioning
    • Up to eight measuring components at the same time, plus process temperature and pressure
    • DOAS and CDE evaluation process
    • Numerous independent measuring ranges with consistent accuracy
    • Automatic self-test function (QAL3) without test gases
    • Overpressure encapsulated design for ATEX Zones 1 and 2
    Proven measurement technology for flue gas monitoring
    • Measurement of up to 10 IR components plus O2 and TOC
    • Hot/wet extractive measurement technology
    • Wear-free gas distribution through ejector pumps
    • Reference point monitoring with internal calibration cells
    • Certified digital Modbus® interface
    • Web server for platform-independent device control
    • Use of dry test gases for HCl and NH3
    Efficient process analysis – even under difficult conditions
    • High selectivity due to high spectral resolution
    • Short response times
    • No calibration required
    • No moving parts: minimal wear and tear
    • No gas sampling or conditioning required
    • Overpressure encapsulated design for ATEX Zone 2