Fluid bed combustor and apparatus for cooling particulate solids
This patent describes a fluidized bed reactor having a housing defining therein a chamber, a bed support plate disposed within the housing and dividing the chamber into a fluidizing zone thereabove and an air plenum therebeneath, and means for supplying particulate material including fuel into the fluidizing zone so as to establish a bed of particulate material therein superadjacent the bed support plate. A means is included for supplying air into the air plenum to pass through the bed support plate into the fluidizing zone to fluidize the bed of particulate material, and a bed drain assembly is adapted to receive particulate material for removal from the bed, the bed drain assembly comprising: a. first conduit means having a bounding wall defining a passageway having an inlet communicating with the bed for receiving particulate material and an outlet for discharging particulate material therefrom; b. second conduit means disposed coaxially about the first conduit means and defining an annular passageway therebetween having an inlet opening at one end thereof and an outlet opening at the other end thereof for conveying a cooling fluid therethrough in indirect heat exchange relationship with the particulate material passing through the first conduit means; and c. heat transfer pins each mounted within the bounding wall of the first conduit means such that a first portion of each of the heat transfer pins extends into the passageway for particulate material defined within the first conduit means and a second portion of each of the heat transfer pins extends into the annular passageway for cooling fluid defined between the first and second conduit means.
- Assignee:
- Combustion Engineering, Inc., Windsor, CT
- Patent Number(s):
- US 4623309
- OSTI ID:
- 7039270
- Resource Relation:
- Patent File Date: Filed date 20 Nov 1985
- Country of Publication:
- United States
- Language:
- English
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