Theoretical model and preliminary design of an innovative wet scrubber for the separation of fine particulate matter produced by biomass combustion in small size boilers. (September 2018)

• Record Type: Journal Article
• Authors: Bianchini, Augusto; Pellegrini, Marco; Rossi, Jessica; Saccani, Cesare
• Is Part Of: Biomass and bioenergy. Volume 116(2018)
• Page Start: 60
• Page End: 71
• Publication Date: 2018-09
• Subjects: Biomass combustion -- Particulate emissions -- Particle collection efficiency prediction -- Wet scrubber mathematical model -- Wet scrubber preliminary design; Biomass energy -- Periodicals; Biomass -- Periodicals; Energy-Generating Resources -- Periodicals; Bioénergie -- Périodiques; 333.9539
• DOI: 10.1016/j.biombioe.2018.05.011
• Languages: English
• ISSNs: 0961-9534

Abstract

Abstract: Fine particulate matter (PM) emission from biomass boilers for non-industrial heating represents one of the most important causes (together with the transport sector) of air pollution, in particular during winter. Separation technologies for fine PM are already well-known and adopted on an industrial scale, as a consequence of strict limits set by national and international regulations. On domestic boilers, the same technologies utilized on an industrial scale are not feasible due to high investment costs. Moreover, the emission limits for small size biomass boilers are higher than for industrial boilers, so high efficiency separation technologies are not needed, and are sometimes not present at all. The main goal of the paper is the development and testing of a mathematical model that is able to foresee the PM removal efficiency of a wet scrubber device. After an experimental validation based on several tests, it was possible to approach the preliminary design of an innovative wet scrubber, which is described in the paper. The main characteristics are (i) removal efficiency over 99.9%, (ii) specific energy consumption under 36 kJ m −3, which is an industrial reference, and (iii) relatively low investment, operation and maintenance costs. Highlights: Preliminary design of a new wet scrubber for particulate matter removal. Optimization of the wet scrubber parameters for small biomass boiler. Study of suspended particle motion and collection mechanisms. Prediction of particle collection efficiency through mathematical models.