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AssigneeBuilding Materials Investment Corporation
InventorsDenis Muki Tibah, Daniel E. Boss, Nicholas R. Soto
Estimating the term…
It has been discovered that the efficiency of asphalt blow stills can be improved by sectionalizing the blow still with perforated plates at various heights within the blow still. The perforated plates which contain a multitude of holes act to reduce air bubble size and improve the dispersion of the air bubbles throughout the asphalt flux. This increases the total surface area per unit volume of the air bubbles and promotes a faster processing time. The perforated plates also increase the contact time between the air bubbles and the asphalt flux which further results in improved efficiency and reduced blow times. This is beneficial because faster processing times can be achieved resulting in more efficient use of equipment, higher levels of productivity, lower energy requirements, cost savings, reduce blow loss, and reduced thermal history to which the asphalt is exposed.
A blow still comprising a top end, a bottom end, and at least one side wall which extends from the bottom end to the top end and defines the side borders of the blow still, said blow still being divided into at least two oxidation sections by at least one perforated plate, wherein the oxidation sections include a lowermost oxidation section which is situated at the bottom of the blow still, said blow still being further comprised of an air introduction inlet which is situated within the lowermost oxidation section of the blow still, wherein the air introduction inlet is a direct air injection device.
Dependencies are inferred from the claim text.