Oil and water separating system with hydrocyclone and floatation device
Patent 5021165 Issued on June 4, 1991. Estimated Expiration Date: 
December 8, 2009. 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.
December 8, 2009. 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 ReferencesRemoving oil from waste water with sulfur Continuous process for the reclamation of waste drilling fluids Method of removing dissolved oil from produced water Water treating using a series coalescing flume Patent #: 4935154 InventorAssigneeApplicationNo. 449830 filed on 12/08/1989US Classes:210/703, Effecting flotation210/202, Diverse type210/251, COMBINED210/512.1, TANGENTIAL FLOW OR CENTRIFUGAL FLUID ACTION210/787, Cyclonic, or centrifugal (e.g., whirling or helical motion or by vortex, etc.)210/806, Plural separating210/808Including specified pressure changeExaminersPrimary: Dawson, Robert A.Assistant: Drodge, Joseph W. Attorney, Agent or FirmForeign Patent References
International ClassesB01D 017/035B01D 017/038 Foreign Application Priority Data1987-06-10 AUAbstractA separation system for separating oil and water components of a liquid mixture wherein the oil component is comprised of droplets of a less dense phase in a more dense water phase. The mixture is fed to separation devices including a hydrocyclone for generally reducing the oil in water concentration to less than 500 ppm. The underflow of the hydrocyclone is passed to a downstream flotation device for further separation as by settling, which may be further assisted by liberating gas in the mixture, in the flotation device, to adhere such gas to oil droplets and thereby carry such droplets to the surface of the device. Pressure of fluids leaving the hydrocyclone may be reduced before entering the flotation device. A residence vessel upstream of the hydrocyclone may be provided to precoalese the mixture prior to entering the hydrocyclone.Other References
Field of SearchCOMBINEDDiverse TANGENTIAL FLOW OR CENTRIFUGAL FLUID ACTION Multiple cyclone Effecting flotation Including chemical addition (with or without bouyancy gas) Cyclonic, or centrifugal (e.g., whirling or helical motion or by vortex, etc.) Introducing liquid tangentially And additional diverse separation Plural separating WITH HEATER OR HEAT EXCHANGER With treating fluid addition DIVERSE DISTINCT SEPARATORS Including temperature change Making an insoluble substance or accreting suspended constituents Medium within foraminous supporting container or sheath WITH MEANS TO ADD TREATING MATERIAL | |
