Inorganic fertilizer producers usually employ prilling towers to get nutrients bound together in even size particles. As consequence of prilling, fine particulate matter (PM) is emitted being its concentration typically sampled manually applying gravimetric methods. This work evaluates the operational performance of two distinct online PM analyzers, electrodynamic analyzer (EDA) and optical scatter analyzer (OSA) in an fertilizer industrial prilling tower against manual sampling. The results show an artificial high emission reading on the EDA every 15 min, what was found to be injection of cleaning steam in the tower, affecting the response, besides manufacturer states the analyzer can deal with changes on relative humidity. The contamination on the sensors affects the reading on both analyzers at some extent but only the OSA indicates the need for cleaning (span test less than 80%) while the self-check responses on EDA is always at 100%. This false response could be probably due to not optimal flow of purge air injected in the probe of EDA rod to keep it clean. It is also observed that...
Session: G14 - Measurement Techniques II
Day: 24 October 2019
Time: 10:45 - 12:00 h