Method and apparatus for separation of solids from a gaseous stream
Patent 4904281 Issued on February 27, 1990. Estimated Expiration Date: 
July 15, 2008. 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.
July 15, 2008. 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 ReferencesFluidized catalytic cracking Method and new distributor for delivering high velocity gas from a gas distributor through a nozzle with decreased erosion in the nozzle Multistage stripper for FCC unit with catalyst separation by spinning Patent #: 4572780 InventorAssigneeApplicationNo. 219955 filed on 07/15/1988US Classes:95/271, Tangential gas inflow (e.g., cyclone, etc.)55/345, Centrifugal55/398, Plural, angularly spaced55/401, Plural distinct separating media or stages55/404, Moved by system fluid in confined flow path55/452, With plural concentrate outlets in arcuate, axially extending whirl chamber wall208/161, Separation of entrained fines from effluents422/144Including means to strip reaction mass from, or to regenerate, the particulate matter (including fluidized bed regenerators, per se)ExaminersPrimary: Hart, Charles N.Attorney, Agent or FirmInternational ClassesB01D 045/12C10G 011/18 AbstractA method for separating particulate solids from a gaseous stream laden with the solids includes discharging the gaseous stream with a swirling movement downwardly into a containment vessel, and impinging the stream on a bed of the separated solids maintained at the lower end of the vessel to reverse the direction of gas flow upwardly through a return zone which encircles the core zone. The gaseous stream is withdrawn from the return zone at the upper end of the vessel and, optionally, may be passed from the return zone to a second stage separation zone, such as one or more cyclone separators, for removal of residual particulate solids from the gaseous stream. Apparatus of the invention includes a flow-constricting nozzle mounted on a containment vessel and having flow guide vanes and/or gas injection nozzles associated therewith to impart a swirling motion to the gaseous stream which is discharged from the nozzle downwardly into the containment vessel. One or more openings are provided about the upper end of the containment vessel and are connected in flow communication with the second stage separation zone.Field of SearchCentrifugalParallel Plural, angularly spaced Plural distinct separating media or stages Plural moving separators serially arranged With tangential concentrate outlet pipe Plural nonradial gas passages in peripheral wall (e.g., tuyere) Helical vane or baffle within flow conduit Moved by system fluid in confined flow path Separation of entrained fines from effluents Including means to strip reaction mass from, or to regenerate, the particulate matter (including fluidized bed regenerators, per se) | |
