FILTECH 2023, The Filtration Event

Cologne, Germany

14.02.-16.02.2023

F. Reinke, J. Meyer, A. Dittler

Low-cost PM sensors are widely applied in the field of particle immision measurement. In addition, they are already established in the application of emission characterization for the detection of temporal and local particle concentration. Due to those characteristics, low-cost PM sensors represent a promising approach for the use in autonomous process control and process management of dedusting systems.

For an effective process control and process management of dedusting systems, the characterization of particle properties (particle concentration and particle size distribution) is one of the key issues. Real-time access to relevant process parameters (particle concentrations and particle size distributions), e.g. by in-situ-measurements, is not feasible at the present development stage. The measurement of the particle properties should take place directly in the process (in-line). Therefore, in contrast to high-cost sensors, which cost above 20.000 EUR and are mainly suited for laboratory applications, particle measurement technologies available at reasonable costs are needed. For this reason, low-cost PM sensors for in-situ-measurement of particle concentrations and particle size distributions are to be investigated fundamentally with regard to their applicability in dedusting systems. The long-term stability of both the electronic and optical components of the sensors has not yet been investigated under the focus of emission characterization.

In this contribution, the aging behavior of low-cost PM sensors under idealized conditions (flow form, particle concentration levels, relative humidity), is presented in relation to the particle deposition inside the sensor.