Wear compensating seal means for rotary piston coal feeder
- Morgantown, WV
The present invention is directed to a wear compensating seal arrangement for use in a rotary piston feeder utilized for feeding pulverized coal into a gasifier operating at relatively high pressures and elevated temperatures. The rotary piston feeder has a circular casing with a coal loading opening therein diametrically opposed from a coal discharge and contains a rotatable disoidal rotor having a cylinder in which a reciprocatable piston is disposed. The reciprocation of the piston within the cylinder is provided by a stationary conjugate cam whereby pulverized coal from a coal hopper at atmospheric pressure can be introduced into the cylinder and then discharged therefrom into the high pressure gasifier while maintaining minimal losses of producer gas and the expenditure of minimal energy which would detract from the efficiency of the gasification. The seal arrangement of the present invention is disposed between the rotor and the casing about the coal discharge and prevents the high pressure gases from within the gasifier from escaping between these relatively movable parts during operation of the coal feeder. The seal utilizes a primary seal in contact with the rotor and a secondary seal supporting the primary seal. The primary seal is continuously urged towards the rotor by springs and the high pressure producer gas.
- Research Organization:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4142868
- OSTI ID:
- 863302
- Country of Publication:
- United States
- Language:
- English
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High pressure rotary piston coal feeder for coal gasification applications
High pressure rotary piston coal feeder for coal gasification applications
Related Subjects
compensating
seal
means
rotary
piston
coal
feeder
directed
arrangement
utilized
feeding
pulverized
gasifier
operating
relatively
pressures
elevated
temperatures
circular
casing
loading
therein
diametrically
opposed
discharge
contains
rotatable
disoidal
rotor
cylinder
reciprocatable
disposed
reciprocation
provided
stationary
conjugate
whereby
hopper
atmospheric
pressure
introduced
discharged
therefrom
maintaining
minimal
losses
producer
gas
expenditure
energy
detract
efficiency
gasification
prevents
gases
escaping
movable
operation
utilizes
primary
contact
secondary
supporting
continuously
urged
towards
springs
seal arrangement
coal feeder
rotary piston
diametrically opposed
coal feed
pressure gas
pulverized coal
elevated temperatures
elevated temperature
atmospheric pressure
relatively movable
pressure gasifier
piston feeder
piston coal
coal hopper
pressure gases
seal means
secondary seal
minimal energy
gasifier operating
wear compensating
feeding pulverized
compensating seal
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