Ceramic hot-gas filter

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872278

Connolly, Elizabeth Sokolinski ^[1]; Forsythe, George Daniel ^[2]; Domanski, Daniel Matthew ^[3]; Chambers, Jeffrey Allen ^[4]; Rajendran, Govindasamy Paramasivam ^[5]

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1. Wilmington, DE
2. Landenberg, PA
3. New Castle, DE
4. Hockessin, DE
5. Boothwyn, PA

A ceramic hot-gas candle filter 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 backpulse cleaning and is resistant to chemical degradation at high temperatures.

• Research Organization: ALLIED-SIGNAL COMPOSITES INC
• DOE Contract Number: AC21-94MC31214
• Assignee: AlliedSignal Composites Inc. (Newark, DE)
• Patent Number(s): US 5902363
• OSTI ID: 872278
• Country of Publication: United States
• Language: English

Related Subjects

ceramic
hot-gas
filter
candle
porous
support
filament-wound
oxide
yarn
partially
surrounded
refractory
matrix
membrane
layer
surface
outer
inner
formed
arrangement
circularly
wound
continuous
filament
filler
material
permeable
structure
combination
particularly
effective
features
gaps
intentionally
placed
adjacent
windings
particulates
uniformly
distributed
throughout
gap
region
withstand
thermal
cycling
backpulse
cleaning
resistant
chemical
degradation
temperatures
uniformly distribute
continuous filament
gas filter
filler material
ceramic matrix
thermal cycling
inner surface
outer surface
support structure
uniformly distributed
porous support
oxide ceramic
membrane layer
distributed throughout
refractory oxide
ceramic particulates
particularly effective
withstand thermal
candle filter
ceramic hot-gas
ceramic filler
ceramic yarn
porous refractory
ceramic particulate
partially surrounded
hot-gas candle
filament-wound oxide
ceramic hot
/55/