Apparatus and method for controlling the rotary airlocks in a coal processing system by reversing the motor current rotating the air lock
Patent
·
OSTI ID:870688
- Hardin, MT
An improvement to a coal processing system where hard materials found in the coal may cause jamming of either inflow or outflow rotary airlocks, each driven by a reversible motor. The instantaneous current used by the motor is continually monitored and compared to a predetermined value. If an overcurrent condition occurs, indicating a jamming of the airlock, a controller means starts a "soft" reverse rotation of the motor thereby clearing the jamming. Three patterns of the motor reversal are provided.
- Research Organization:
- Western Syncoal Company (Billings, MT)
- DOE Contract Number:
- FC22-90PC89664
- Assignee:
- Western Syncoal Company (Billings, MT)
- Patent Number(s):
- US 5575085
- OSTI ID:
- 870688
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/34/110/318/417/
air
air lock
airlock
airlocks
apparatus
clearing
coal
coal process
coal processing
compared
condition
condition occurs
continually
controller
controlling
current
driven
found
hard
hard material
hard materials
improvement
indicating
inflow
instantaneous
jamming
lock
materials
means
method
monitored
motor
motor current
occurs
outflow
overcurrent
patterns
predetermined
predetermined value
processing
provided
reversal
reverse
reverse rotation
reversible
reversible motor
reversing
rotary
rotary airlock
rotating
rotation
soft
starts
value
air
air lock
airlock
airlocks
apparatus
clearing
coal
coal process
coal processing
compared
condition
condition occurs
continually
controller
controlling
current
driven
found
hard
hard material
hard materials
improvement
indicating
inflow
instantaneous
jamming
lock
materials
means
method
monitored
motor
motor current
occurs
outflow
overcurrent
patterns
predetermined
predetermined value
processing
provided
reversal
reverse
reverse rotation
reversible
reversible motor
reversing
rotary
rotary airlock
rotating
rotation
soft
starts
value