Abstract
A non-extractive laser based continuous analyzer for HCl (laser analyzer) was compared with an ion electrodebased continuous analyzer for HCl (ion electrode analyzer) at municipal waste incinerators. A laser analyzer monitors concentrations of HCl in wet gas and responds well to short-term changes in concentration. An ion electrode analyzer monitors concentrations of HCl in dry gas that are averaged over a short time and have some time lag.
There was good correlation between concentrations of HCl in dry gas, calculated from values measured with a laser analyzer and water content of the flue, and values measured with an ion electrode analyzer. It was clear that a laser analyzer was a practical monitor for concentrations of HCl in wet gas and a laser analyzer could be used to report HCl in dry gas for self-management at municipal waste incinerators by calculation from HCl values measured and mean water content measured beforehand.
