Process for making ceramic hot gas filter

Patent · Sun Dec 31 23:00:00 EST 2000

OSTI ID:873522

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 6180054
• OSTI ID: 873522
• Country of Publication: United States
• Language: English

Related Subjects

/264/55/156/
adjacent
arrangement
backpulse
candle
candle filter
ceramic
ceramic filler
ceramic hot
ceramic hot-gas
ceramic matrix
ceramic particulate
ceramic particulates
ceramic yarn
chemical
circularly
cleaning
combination
continuous
continuous filament
cycling
degradation
distributed
distributed throughout
effective
features
filament
filament-wound
filament-wound oxide
filler
filler material
filter
formed
gap
gaps
gas
gas filter
hot
hot gas
hot-gas
hot-gas candle
inner
inner surface
intentionally
layer
material
matrix
membrane
membrane layer
outer
outer surface
oxide
oxide ceramic
partially
partially surrounded
particularly
particularly effective
particulates
permeable
placed
porous
porous refractory
porous support
process
refractory
refractory oxide
region
resistant
structure
support
support structure
surface
surrounded
temperatures
thermal
thermal cycling
throughout
uniformly
uniformly distribute
uniformly distributed
windings
withstand
withstand thermal
wound
yarn