Abbattimento del particolato sottile negli impianti di combustione a biomasse di piccola taglia

The limits of fine particles in ambient, established by the European Union, are exceeded during the winter season because the use in civil heating of biomass plants introduce in ambient high level of particulate matter (PM10 and PM2.5). This panorama is aggravated by the fact that these boilers are extremely widespread and are not included in the dust emissions legislation. The target of the thesis consists in the design, implementation and testing of a device for the filtration of particulates for small size boilers for domestic use. The filtration system to be obtained must be characterized by: high filtration efficiency, low energy consumption, high simplicity of installation so to be integrate on existing systems, easy maintenance. To achieve the project's objectives, in the laboratories of the Department of Industrial Engineering, were set up different experimental systems for the evaluation of various solutions, allowing to measure the amount of particulate emissions as a function of operating parameters. The analysis of the test performed previously and the results obtained made it possible to proceed with the design of a filtration system that meets the set objectives. The results in getting tested configurations were then used to make a mathematical model that allows to compare the effectiveness of various parameters on the overall efficiency of the particulate capture emitted from the boiler in function of its load and its particle size; in this manner is finally identified a solution to achieve the project objectives.