Tepelný výpočet a návrh úprav kotle G230 pro palivo s vyšší výhřevností

Abstract

This thesis deals with the possibility, consequences and effects of combustion of fuel, which has higher heating value than currently combusted fuel, in the G230 steam boiler. A series of diagnostic measurements has been carried out on G230 boiler in Opatovice Power Plant to produce a starting point for calculations. To determine the input values, the balance calculations have been compiled in Engineering Equation Solver software. Based on the measured and calculated values, the thermal balance mathematical model of the boiler has been assembled and fine-tuned in the Kotel 3.0 software interface. After the analysis of results have been stated recommendations for boiler modifications, when some critical boiler parts (like burners and coal powder classifier) were further modeled in Computational Fluid Dynamics Software ANSYS CFX. Results of the thesis are proposals for coal powder classifier modification and proposal of flue gases recirculation.