Ceramic hot-gas filter

Patent · 11 May 1999

OSTI ID:350308

Connolly, E S; Forsythe, G D; Domanski, D M; Chambers, J A; Rajendran, G P

A ceramic hot-gas candle filter is described having a porous support of filament-wound oxide ceramic yarn at least partially surrounded by a porous refractory oxide ceramic matrix, and a membrane layer on at least one surface thereof. The membrane layer may be on the outer surface, the inner surface, or both the outer and inner surface of the porous support. The membrane layer may be formed of an ordered arrangement of circularly wound, continuous filament oxide ceramic yarn, a ceramic filler material which is less permeable than the filament-wound support structure, or some combination of continuous filament and filler material. A particularly effective membrane layer features circularly wound filament with gaps intentionally placed between adjacent windings, and a filler material of ceramic particulates uniformly distributed throughout the gap region. The filter can withstand thermal cycling during back pulse cleaning and is resistant to chemical degradation at high temperatures.

• Research Organization: Allied-Signal Composites Inc
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC21-94MC31214
• Assignee: AlliedSignal Composites Inc., Newark, DE (United States)
• Patent Number(s): US 5,902,363/A/
• Application Number: PAN: 8-896,372
• OSTI ID: 350308
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
CORROSION RESISTANCE
DEASHING
DESIGN
FILTERS
FUEL GAS
HOT GAS CLEANUP
MECHANICAL PROPERTIES