Regeneration of fluid solid particles and separation of solid particles from combustion product flue gases
This patent describes a method for removing carbonaceous deposits from fluid solid particles and separating entrained solid fines from combustion product flue gases which comprises: forming a mixture of solid particles comprising carbonaceous deposits with sufficient hot regenerated solid particles to form a mixture thereof at a temperature of at least 649/sup 0/C (1200/sup 0/F) dispersed in suspension forming combustion supporting oxygen containing gas at a particles concentration within the range of 3 to 35 lbs/cu.ft.; passing the suspension mixture thus formed in (a) upwardly through a combustion zone as a suspension under conditions selected to restrict combustion temperatures thereof below 871/sup 0/C (1600/sup 0/F); discharging the upwardly flowing gas-solids suspension in combustion product flue gases as a confined stream into a zone in open communication with an annular zone about the confined stream, directing the discharged suspension downwardly through the annular zone at a velocity whereby entrained particles solid are separated from combustion flue gas by withdrawing flue gas radially from the annular zone by an open ended confined passageway extending outwardly from above a collected bed of solid particles in a lower bottom portion of the annular zone; passing separated flue gases comprising entrained solid fines from an upper part of the second separation zone upwardly through an open end elongated confined riser transport zone discharging upwardly into a third separation zone under velocity conditions establishing a momentum differential between entrained solid fines and combustion product flue gases.
- Assignee:
- Ashland Oil, Inc., Ashland, KY
- Patent Number(s):
- US 4786622
- OSTI ID:
- 6341131
- Resource Relation:
- Patent File Date: Filed date 9 Jan 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBONACEOUS MATERIALS
MATERIALS RECOVERY
FLUE GAS
SEPARATION PROCESSES
PARTICULATES
REGENERATION
SUSPENSIONS
WASTE PROCESSING
DISPERSIONS
GASEOUS WASTES
MANAGEMENT
MATERIALS
PARTICLES
PROCESSING
RECOVERY
WASTE MANAGEMENT
WASTES
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