SERVOTOUGH
USING THE SERVOTOUGH Laser 3 Plus IN THE AMMONIA SLIP PROCESS
COMBUSTION PROCESSES PRODUCE HARMFUL NOX EMISSIONS. CONTROLLING THESE EMISSIONS MEANS ADDING AMMONIA TO THE FLUE GAS IN ORDER TO LOWER NOX
EXCESS NOx
EXCESS AMMONIA LEADING TO AMMONIUM BISULFATE BUILD UP
AMMONIA SLIP
Inside the process
1. Combustion processes produce harmful NOx emissions, which are controlled by using ammonia to lower NOx output. If the process is overdosed with ammonia, this is called ammonia slip.
2. Excess ammonia can contaminate the flue gas, reduce the value of the fly ash, and causes a damaging build-up of ammonium bisulfate in the catalyst.
3. So, it is important to control the level of ammonia slip between 2-3 parts per million ammonia to ensure NOx reduction and prevent acid and particulate formation associated with excess ammonia.
Tunable Diode Laser( TDL) gas analyzers have taken over from extractive systems as the industry standard for ammonia slip monitoring.
As there is no physical interaction with the process, TDL can offer a highly stable, fast and reliable measurement. Yet TDL analyzers can struggle in dust-heavy DeNOx environments with drift, and lose lock on the process signal, returning incorrect measurements due to light scatter, or lose measurement, due to mechanical movements.
They can require frequent recalibration and maintenance, particularly in hot, dusty environments that block insertion tubes and contaminate optics.
Standard laser system
P08 ENSURE A FULL LIFETIME OF PERFORMANCE