FLUIDIZATION OF SAND POLLUTED WITH OIL

摘要

Oil spills on French Atlantic coast as well as, more recently, the Spanish one have incited to create the research network RITMER that funds several projects from the black-sea prevention to the depollution of wastes brought from the polluted sea sides. One of the routes to depollute these sands polluted with oil is to burn the oil products bound to their surface in a fluidized bed incinerator. THERMER project is aimed at studying (ⅰ) the fluidizability of moistured and polluted sand in a fluidized bed (cold model), (ⅱ) the quality of remediation in a hot fluidized bed and (ⅲ) co-combustion with municipal solid wastes. This paper presents the results of the cold model fluidizability tests that were carried out to determine the minimum fluidization velocity (U_(mf)) of the oil polluted sand as a function of the nature of the oil products, presence of water, the extent of pollution and the sand particle size distribution. The U_(mf) is related to the interparticle cohesive force using a K-multiple in the Ergun equation. It is demonstrated that this coefficient K is a function of the level of pollution and the type of the oil product.