Abstract
Energy recycling of wasted plastic resin is focused in this investigation. Fine grinding of plastic resin and preparation of high temperature oxidizing atmosphere are indispensable for effective and successful burn-up of plastic resin. Polyethylene terephthalate resin powder is employed and the high temperature oxidizing atmosphere is generated downstream the annular burner. Temperature and O_2 concentration fields downstream the annular burner are first examined by varying the circular jet equivalence ratio with the air flow rate kept constant and without PET-powder supply. PET-powder having a mass-median diameter of either 89.7 um or 145 μm and stoichiometric propane-air mixture are then issued into the high temperature region by varying the PET-powder mass flow rate. Appearances of the PET flame are observed using a high-speed video camera and PET particles are traced during their passages in the high temperature region. Variation of O_2 concentration fields due to PET-powder combustion is also measured in the PET flame. According to the results, overall limit conditions for effective burn-up of PET-powder are finally discussed.
