Particle withdrawal from fluidized bed systems
Patent
·
OSTI ID:864090
- 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
- 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
/48/110/414/422/
accumulated
accumulation
allow
allow removal
apparatus
ash
average
bed
bed coal
bed combustion
bed systems
below
closed
coal
coal gas
coal gasification
combustion
controlled
discrete
drops
elevation
fluidized
fluidized bed
fluidizing
fluidizing gas
form
formed
gas
gasification
gasification reactor
indicator
injected
interface
interface region
interrelated
method
minimum
monitored
motor
motor control
operating
operating temperature
outlet
outlet valve
particle
portion
positioned
reactor
reactor vessel
region
removal
removing
rises
setting
substantially
supplemental
systems
temperature
temperature indicator
temperature substantially
thermal
thermocouple
upwardly
valve
vessel
withdrawal
accumulated
accumulation
allow
allow removal
apparatus
ash
average
bed
bed coal
bed combustion
bed systems
below
closed
coal
coal gas
coal gasification
combustion
controlled
discrete
drops
elevation
fluidized
fluidized bed
fluidizing
fluidizing gas
form
formed
gas
gasification
gasification reactor
indicator
injected
interface
interface region
interrelated
method
minimum
monitored
motor
motor control
operating
operating temperature
outlet
outlet valve
particle
portion
positioned
reactor
reactor vessel
region
removal
removing
rises
setting
substantially
supplemental
systems
temperature
temperature indicator
temperature substantially
thermal
thermocouple
upwardly
valve
vessel
withdrawal