Apparatus and method for controlling the rotary airlocks in a coal processing system by reversing the motor current rotating the air lock
Abstract
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.
- Inventors:
-
- Hardin, MT
- Issue Date:
- Research Org.:
- Western Syncoal Company (Billings, MT)
- OSTI Identifier:
- 870688
- Patent Number(s):
- 5575085
- Assignee:
- Western Syncoal Company (Billings, MT)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10B - DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- DOE Contract Number:
- FC22-90PC89664
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- apparatus; method; controlling; rotary; airlocks; coal; processing; reversing; motor; current; rotating; air; lock; improvement; hard; materials; found; jamming; inflow; outflow; driven; reversible; instantaneous; continually; monitored; compared; predetermined; value; overcurrent; condition; occurs; indicating; airlock; controller; means; starts; soft; reverse; rotation; clearing; patterns; reversal; provided; air lock; motor current; predetermined value; reversible motor; reverse rotation; coal processing; condition occurs; hard material; hard materials; rotary airlock; coal process; /34/110/318/417/
Citation Formats
Groombridge, Clifton E. Apparatus and method for controlling the rotary airlocks in a coal processing system by reversing the motor current rotating the air lock. United States: N. p., 1996.
Web.
Groombridge, Clifton E. Apparatus and method for controlling the rotary airlocks in a coal processing system by reversing the motor current rotating the air lock. United States.
Groombridge, Clifton E. Mon .
"Apparatus and method for controlling the rotary airlocks in a coal processing system by reversing the motor current rotating the air lock". United States. https://www.osti.gov/servlets/purl/870688.
@article{osti_870688,
title = {Apparatus and method for controlling the rotary airlocks in a coal processing system by reversing the motor current rotating the air lock},
author = {Groombridge, Clifton E},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1996},
month = {Mon Jan 01 00:00:00 EST 1996}
}
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