Method and system for controlling the backflow sealing efficiency and recycle rate in fluidized bed reactors

Patent · Tue Sep 11 04:00:00 EDT 1990

OSTI ID:6242703

Abdulally, I F

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
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
COMBUSTORS
DESIGN
EQUIPMENT
FLUE GAS
FLUIDIZED-BED COMBUSTORS
GASEOUS WASTES
HEAT RECOVERY EQUIPMENT
PARTICLES
PARTICULATES
REMOVAL
SEPARATION EQUIPMENT
SEPARATION PROCESSES
WASTES