Apparatus and method for removing particulate deposits from high temperature filters

Patent · Tue Dec 31 23:00:00 EST 1991

OSTI ID:868562

Nakaishi, Curtis V ^[1]; Holcombe, Norman T ^[2]; Micheli, Paul L ^[1]

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1. Morgantown, WV
2. McMurray, PA

A combustion of a fuel-air mixture is used to provide a high-temperature and high-pressure pulse of gaseous combustion products for the back-flush cleaning of ceramic filter elements contained in a barrier filter system and utilized to separate particulates from particulate-laden process gases at high temperature and high pressure. The volume of gaseous combustion products provided by the combustion of the fuel-air mixture is preferably divided into a plurality of streams each passing through a sonic orifice and conveyed to the open end of each filter element as a high pressure pulse which passes through the filter elements and dislodges dust cake supported on a surface of the filter element.

• Research Organization: National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5167676
• OSTI ID: 868562
• Country of Publication: United States
• Language: English

Related Subjects

/95/55/60/
air mixture
apparatus
back-flush
barrier
cake
ceramic
ceramic filter
cleaning
combustion
combustion product
combustion products
contained
conveyed
deposits
dislodges
divided
dust
element
elements
elements contained
filter
filter element
filter elements
filters
fuel-air
fuel-air mixture
gaseous
gaseous combustion
gases
high-pressure
high-temperature
method
mixture
orifice
particulate
particulate deposits
particulate-laden
particulates
passes
passing
plurality
preferably
pressure
pressure pulse
process
process gas
products
provide
provided
pulse
removing
removing particulate
separate
separate particulate
sonic
streams
supported
surface
temperature
utilized
volume