Method and system for controlling the backflow sealing efficiency and recycle rate in fluidized bed reactors
This patent describes a fluidized bed combustion system. It comprises: separating means for receiving a mixture of flue gages and entrained particulate material from fluidized bed and separating the entrained particulate material from the flue gases, means for passing the separated flue gases from the separating means to a heat recovery unit, a seal vessel, a dipleg for passing the separated material from the separating means to the seal vessel, means for passing the separated material from the seal vessel back to the fluidized bed, and means for introducing air or gas to the seal vessel for fluidizing the separated material in the seal vessel to seal against the backflow of the separated material from the fluidized bed, through the dipleg and back to the separating means. The air introducing means comprises a first conduit for introducing air or gas into the seal vessel in a path aligned with the flow path of the separated material from the dipleg, and a second conduit for introducing air or gas into an area of the seal vessel surrounding the flow path of air or gas from the first conduit.
- Assignee:
- Foster Wheeler Energy Corp., Clinton, NJ (USA)
- Patent Number(s):
- US 4955295; A
- Application Number:
- PPN: US s 7-395864
- OSTI ID:
- 6242703
- Resource Relation:
- Patent File Date: 18 Aug 1989
- Country of Publication:
- United States
- Language:
- English
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