System for pressure letdown of abrasive slurries
- Pittsburgh, PA
A system and method for releasing erosive slurries from containment at high pressure without subjecting valves to highly erosive slurry flow. The system includes a pressure letdown tank disposed below the high-pressure tank, the two tanks being connected by a valved line communicating the gas phases and a line having a valve and choke for a transfer of liquid into the letdown tank. The letdown tank has a valved gas vent and a valved outlet line for release of liquid. In operation, the gas transfer line is opened to equalize pressure between tanks so that a low level of liquid flow occurs. The letdown tank is then vented, creating a high-pressure differential between the tanks. At this point, flow between tanks is controlled by the choke. High-velocity, erosive flow through a high-pressure outlet valve is prevented by equalizing the start up pressure and thereafter limiting flow with the choke.
- 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 5052426
- OSTI ID:
- 868002
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of the JPL pressure letdown system. [Control of letdown without corrosion]
Development of the JPL pressure letdown system. Final report
Related Subjects
letdown
abrasive
slurries
method
releasing
erosive
containment
subjecting
valves
highly
slurry
flow
tank
disposed
below
high-pressure
tanks
connected
valved
line
communicating
gas
phases
valve
choke
transfer
liquid
outlet
release
operation
equalize
level
occurs
vented
creating
differential
controlled
high-velocity
prevented
equalizing
start
thereafter
limiting
outlet valve
outlet line
liquid flow
gas phase
pressure differential
slurry flow
pressure letdown
erosive slurry
disposed below
transfer line
gas transfer
abrasive slurries
/137/210/