Method of filtering

Patent · Tue Apr 09 00:00:00 EST 1985

OSTI ID:5358711

White, H R

This invention provides a non-fibrous combustible filter aid for vacuum pre-coat filter units which is effective to maintain a filter bed coating on rotary filter drums just sufficiently porous to pass the liquid of a slurry while retaining the slurry solids thereon and is capable of being scraped off the bed in thin film form with the slurry solids thereon. The filter aid comprises relatively non-compressible non-fibrous granular charcoal or nut shell particles having a dry bulk density from about 0.3 to about 0.6 grams per cubic centimeter, a particle density of about 1.4 to 1.7 grams per cubis centimeter and a particle size range of 30 to 125 microns. The filter aid of this invention is capable of being burned with the solids deposited thereon to recover the heat value thereof or to dispose of the solids, is free from silicates or other non-combustible ingredients, and is devoid of fibers which will interfere with the proper operation of the filter unit.

• Assignee: Alar Engineering Corporation
• Patent Number(s): US 4510061
• OSTI ID: 5358711
• Resource Relation: Patent File Date: Filed date 27 Oct 1983; Other Information: PAT-APPL-546184
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
FILTERS
OPERATION
SLURRIES
FILTRATION
CHARCOAL
ENERGY EFFICIENCY
FUEL SLURRIES
HEAT RECOVERY
MECHANICAL FILTERS
PACKED BED
SOLID FUELS
VACUUM SYSTEMS
ADSORBENTS
DISPERSIONS
EFFICIENCY
ENERGY RECOVERY
FUELS
MIXTURES
RECOVERY
SEPARATION PROCESSES
SUSPENSIONS
013000* - Coal
Lignite
& Peat- Transport
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014000 - Coal
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