apparatus for treatment of oily sludge
Patent 5006239 Issued on April 9, 1991. Estimated Expiration Date: 
April 23, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 23, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorApplicationNo. 512608 filed on 04/23/1990US Classes:210/181, Flow line connected in series with distinct separator210/202, Diverse type210/299, Including constituent trapping feature210/512.1, TANGENTIAL FLOW OR CENTRIFUGAL FLUID ACTION210/540With discharge portExaminersPrimary: Wyse, Thomas G.Attorney, Agent or FirmInternational ClassesC02F 001/40B01D 017/032 AbstractA novel apparatus removes hydrophobic oil from solid particulates in oily sludge waste such as waste material from oil refineries, drilling fluids or muds brines, and other chemical wastes which have solid particulates contaminated with oil. The process involves separation of different components of the sludge on the basis of their size, density and physio-chemical differences. Coarse particulates are removed with the use of screening systems such as sieve bends or vibro-sieves. Oil is removed from these coarse particulates with water rinsing. Oil is removed from fine particles by gravity separation, which separates the sludge into high and low density fractions. Froth flotation is used to remove hydrophilic materials from the high density fraction. Froth flotation may involve the use of frothing agents, surface modifying agents and surfactants, the selection of which generally depends on the composition of the sludge, the physical and chemical characteristics of the sludge, and the desired separation composition.Other References
Field of SearchFlow line connected in series with distinct separatorDiverse separators Diverse type With outlet at surface, e.g., froth flotation, etc. And gas injecting means other than by mechanical agitation Including a filter Moving filter medium Including constituent trapping feature Screens, e.g., woven TANGENTIAL FLOW OR CENTRIFUGAL FLUID ACTION Lighter constituent trap With discharge port Skimming Rotating drum And additional diverse separation Plural separating | |
