Particle withdrawal from fluidized bed systems
- Greensburg, PA
- Arlington Heights, IL
- Mt. Pleasant, PA
Method and apparatus for removing ash formed within, and accumulated at the lower portion of, a fluidized bed coal gasification reactor vessel. A supplemental fluidizing gas, at a temperature substantially less than the average fluidized bed combustion operating temperature, is injected into the vessel and upwardly through the ash so as to form a discrete thermal interface region between the fluidized bed and the ash. The elevation of the interface region, which rises with ash accumulation, is monitored by a thermocouple and interrelated with a motor controlled outlet valve. When the interface rises above the temperature indicator, the valve opens to allow removal of some of the ash, and the valve is closed, or positioned at a minimum setting, when the interface drops to an elevation below that of the thermocouple.
- Research Organization:
- Westinghouse Electric Corporation
- DOE Contract Number:
- EF-77-C-01-1514
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4309194
- OSTI ID:
- 864090
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
withdrawal
fluidized
bed
systems
method
apparatus
removing
ash
formed
accumulated
portion
coal
gasification
reactor
vessel
supplemental
fluidizing
gas
temperature
substantially
average
combustion
operating
injected
upwardly
form
discrete
thermal
interface
region
elevation
rises
accumulation
monitored
thermocouple
interrelated
motor
controlled
outlet
valve
indicator
allow
removal
closed
positioned
minimum
setting
drops
below
outlet valve
fluidizing gas
gasification reactor
allow removal
interface region
temperature substantially
bed combustion
reactor vessel
fluidized bed
coal gasification
operating temperature
coal gas
bed coal
motor control
temperature indicator
bed systems
/48/110/414/422/