Abstract
Thermal recycling of wasted plastic-resin is focused in this investigation. Polyethylene terephthalate resin powder is employed and a high temperature oxidizing atmosphere is generated downstream an annular burner. Temperature and O_2 concentration fields downstream the annular burner are first examined by varying the slit and nozzle jet velocities with both equivalence ratios kept constant and without PET-powder supply. PET-powder and stoichiometric propane-air mixture are then issued into the high temperature oxidizing atmosphere. Variation of O_2 concentration contours and isothermals due to PET-powder combustion is also measured in the PET-powder flame. According to the results, the relationship between the high temperature oxidizing regions and the unburnt rate of PET-powder is finally discussed.
