Material: raw gases HCl, NOx, Hg, SO2, (CO, O2, H2O)
Installation: before the injection point
Function: online monitoring of gas parameters allowing for precise adjustment of absorber/neutralizer injection, to comply with emission regulations (ELV)
(9)•• Pollutants abatement
During combustion or incineration process, acids are produced due to the composition of the fuels or plastics or other materials contained in the waste. Neutralization/absorption of these species prior to the dust filtration treatment is essential to avoid damage to the filter media and excess of emissions.
This operation is carried out by injecting a quantity of lime, limestone slurry, active carbon powder or sodium bicarbonate powder proportional to the pollutant concentrations (dioxins, furans, heavy metals, acids).
In order to adjust precisely this pollutant reduction in real time, on-line monitoring of HCl, NOx, Hg or SO2 (precursor of SO3 and sulfuric acid derivates) must be set on the process, before the injection point.
Measuring the water content could also be interesting as it would allow the detection of a possible leak in the boiler.
In this purpose, ENVEA recommends the use of its extractive multi-gas NDIR solutions such as the MIR 9000H,
the MIR-IS or the in-situ monitor LAS 300-XD based on TDL technology.
For the Mercury abatement control, ENVEA recommends its SM-4 online mercury analyzer.