Gas separation: processes – Filtering
Reexamination Certificate
2007-01-24
2010-06-08
Smith, Duane (Department: 1797)
Gas separation: processes
Filtering
C048S128000, C048S190000, C096S372000, C096S379000, C055S341100, C055S418000, C414S206000, C414S216000, C432S233000, C432S238000
Reexamination Certificate
active
07731783
ABSTRACT:
A continuous pressure letdown system connected to a hopper decreases a pressure of a 2-phase (gas and solid) dusty gas stream flowing through the system. The system includes a discharge line for receiving the dusty gas from the hopper, a valve, a cascade nozzle assembly positioned downstream of the discharge line, a purge ring, an inert gas supply connected to the purge ring, an inert gas throttle, and a filter. The valve connects the hopper to the discharge line and controls introduction of the dusty gas stream into the discharge line. The purge ring is connected between the discharge line and the cascade nozzle assembly. The inert gas throttle controls a flow rate of an inert gas into the cascade nozzle assembly. The filter is connected downstream of the cascade nozzle assembly.
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International Search Report and Written Opinion for PCT/US 08/00803, Mailed May 23, 2009, 10 pages.
Langowski Terry
Matthews David R.
Sprouse Kenneth M.
Kinney & Lange , P.A.
Pham Minh-Chau T
Pratt & Whitney Rocketdyne Inc.
Smith Duane
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