| Abstract [eng] |
With the rapid development of biomass plant projects, the need for specific research and improvement of biomass plant equipment is becoming more and more common. To ensure proper fuel supply, biomass plants are being built with a special biomass transportation system called push floor. During operation, defects due to fatigue arise, caused by varying operating conditions, environmental effects and fluctuation in forces. The aim of the Master's Thesis is to investigate the fracture at the welding seam of push floor’s scraper, taking into account environmental factors, to determine locations of stress concentrators and to investigate the longevity of the seam. During the analysis of the Master’s Thesis, the fuel supply systems of biomass plants and analogues of the push floor systems are reviewed. The design of the push floor, the principle of operation, the requirements for operation and technical inspection were introduced, wear and tear parts were specified. Relevant problems during operation are discussed, possible causes of these problems are identified - one of them being the crack at the welding seam of the push floor’s scraper. The investigation of the fracture at the welding seam of the push floor’s scraper was performed using the dedicated “hot-spot stress” methodology. The obtained results are used in solving analogous problems on different plants, as well as on improvement on overall design of push floor. |
