Abstract
The possibility of thermal recycling of wasted PET-resin has been investigated in the open atmospheric operation by supplying PET-resin powder as an auxiliary fuel to a proposed twin-fuelled burner. In the preceding experiments, in order to reduce an amount of unburnt PET-particles in the open atmospheric operation, reactive flows and burning processes of PET-particles were investigated using PIV/PTV measurements. Appearances of flying PET-particles were also observed by using the pulse laser and the particle diameter was evaluated as an equivalent diameter. According to the results, some key factors for reducing the unburnt rate of PET-particles were clarified. In this paper, by taking these factors into consideration, an experimental attempt at reducing unburnt particle emission in the recycled PET-resin powder combustion is carried out by varying the PET-powder supply pipe diameter. The result specifies experimentally that the increase in the dispersion degree of PET-particles reduces the unbunt rate of PET-powder.
