In the discharging system for the Vanguard® kiln, the lime discharge is effected from the whole perimeter and it is also possible from the center (optional). Four independent discharging drawers for each shaft are foreseen, to allow the maximum control over the whole discharge section. The cooling air distribution is also optimized and split both through the drawers circumference as well as through the centre cone and the cross divider in order to achieve the best efficiency with the minimum cooling air demand. Differently from other designs, the four hydraulic drawers can be operated independently one by one, two by two, or all together. The lime discharged from the drawers, is collected in the bottom of the kiln itself. In standard regenerative kilns, the lime is then discharged into collecting hoppers placed underneath and fed to the product conveyor by means of vibrating feeders. As regenerative kilns work in positive pressure, the final lime discharge is a batch process which is effected during the cycles reversal. Discharging The The additional flexibility given by the combination of all three methods is purposely intended to optimize lime discharge even in the most demanding conditions. 14 For kilns fired with gaseous fuel, a second sealed valve is introduced to lengthen the cycle time and reduce the inversion time until the virtual time "zero". Zero-Inversion system® 2nd sealed valve at each shaft system
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