CEM - Abstract

Abstract Information :

This abstract for a poster presentation describes technical details for the submitted abstract of the oral presentation with the title: “Continuous fine particulate emission monitoring system for low particle concentrations”. The fine particulate emission monitoring system (FDEMS), which is actual on a prototype stage (to visit at booth 60), consists of a connection unit (power-in and IO-modules), a purge air unit (delivering clean air to keep the optics free from dirt), a sensor unit (measuring chamber and main intelligence) and a blower unit (to suck out the sample aerosol from the stack). The main unique selling points of the FDEMS are: Direct and synchronous measurement of the mass concentration in terms of PM1, PM2.5, PM10 and TSP – Compact, patented system without maintenance-intensive dilution technology – detection limit of only 100µg/m³ dust concentration. It is an extractive system with accurate suction volume flow measurement. This is particularly necessary in the field of emission measurement since an isokinetic sampling according to the applicable guidelines in China and Korea are required here. The FDEMS works as follows: After sampling the particulate stack emissions with a suction probe, the sample gas is passed into an optical measuring chamber, where an optical detection of the particles takes place. There, detectors are distributed circularly around the measuring chamber measuring the scattering signal of the particles that are illuminated by three different laser diodes in the wavelength range from UV to NIR. This multi-angle detection is much more precise to detect the small fraction of particulate matter, i.e., PM1.0, PM2.5. Signal analysis takes place in the CPU, where an inversion algorithm transforms the detector values into a particle size distribution curve in the range of 0.1 to 30 microns particle diameter. Based on this information to calculate the well-known total mass concentration (TSP) as well as PM fractions (e.g. PM1.0, PM2.5, PM10). Furthermore, the FDEMS is equipped with an automatic zero, span, linearity, and contamination measurement according to the requirements of EN15267-3 to verify the correct function of the device during operation.