Conclusion
Based on above table Prepol option of TKIL seems to be better as there is no
mechanical system of AFR firing so reliability may be high. Here calciner retention
time should be as high as possible (15-18 Seconds) suitable to burn any kind of AFR`s.
Possibility of taking out burnt Ash extraction system outside the kiln to be discussed
from suppliers as this ash contains lots of impurities like silica, sulphur, chloride and
alkali which disturb the kiln operation. It also creates coating and buildups at kiln inlet
chamber. Alkali & chloride bypass system requirement should also to be discussed
since concept stage.
CFD analysis of fuel firing points, TAD entry to be carried out in advance to avoid any
problem during operation.