| Abstract [eng] |
The final report for master’s degree focuses on the design and analysis of an aerodynamic droplet separator technology for cleaning of biomass boiler emissions. The purpose of the equipment is to collect and remove solid particle containing steam droplets that are suspended in the emissions from the biomass combustion process. The aim of this project is to manufacture and test the optimal design of an aerodynamic droplet eliminator device based on the results of mathematical modelling and theoretical calculations of aerosol physics. The theoretical background section reviews literature on the methods of solid particle agglomeration and collection, a wide range of knowledge on aerodynamic devices and their types, operational conditions as well as their capabilities and modifications. The review also reports on the recent knowledge of droplet separators. The methodology section presents the equations used to calculate the required parameters of the aerodynamic device and to evaluate the criteria for the inlet flow. CFD model, provided by SolidWorks SDK (2017 – 18, Dassault Systemes) and used in this project, is described. The process of testing of the physical model of the device is presented. The results section discusses the performance of the aerodynamic droplet separator. Different methodologies described in the project part were used and have shown the possible outcomes in terms of the effectiveness of the device. Generally, it has been observed that the effectiveness for droplets of 1 μm can range between 4 % to 52% depending on the gap between the plates in separation section, number of plates, volumetric flow rate of the incoming gas flow and the droplet size. Effectiveness of the aerodynamic droplet separator increases proportionally with increasing droplet size and reaches 100% in all cases where the size is larger than 10μm. |
