Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
BUBBLE-DROP INTERACTIONS IN FLOTATION COLUMNS – THE PROBABILITY OF COMPOUND DROP FORMATION
Submission Author:
Joel Karp , PR
Co-Authors:
Joel Karp, Tiago Henrique Leitão Dalcuche, Fabricio Silva, Rigoberto Morales
Presenter: Tiago Henrique Leitão Dalcuche
doi://10.26678/ABCM.ENCIT2022.CIT22-0703
Abstract
A populational balance analysis of a flotation system was conducted experimentally. The rate of bubble-drop attachment was investigated using the high-speed shadowgraph technique, based on the total counts of single-fluid drops and formed compound drops. We report the probability of attachment of gas bubbles to oil drops and investigated the conditions for compound drop formation. In order to mimic the conditions often met in an offshore extraction site, the effect of salinity, fluid properties, and the addition of additives were also analyzed. In general, the global probability of bubble-drop attachment prevailed at roughly 30%, regardless of the system of fluids. Thus, the formation of compound drops is governed by the agitation, rather than the properties of the fluids. However, the presence of additives plays an important role in the relative probability, i.e., the rate of compound drop formation for a specific range of bubble diameters. The additives they promote the formation of smaller bubbles that, according to our experiments, substantially increases the formation of bubble-drop compounds.
Keywords
Compound drop, attachment, probability, additivies
