Study of aerosol separation in granular and fibrous filters

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6640970

Kao, J N

A study of a rotating fluidized bed to separate high concentration dusts from flue gases is undertaken. The rotating fluidized bed filter (RFBF) has the advantages of high filtration efficiency, continuous operation and high flow rates of gas per unit area of distributor; thus it appears very attractive for industrial applications. The feasibility of using the RFBF to separate different industrial pollutants containing micron and submicron particles from a contaminated gas stream is demonstrated using a high dust concentration air stream at room temperature as well as exhaust gases from a diesel engine. Efficiency and pressure drop under continuous operation of the filter are measured. Experiments to determine minimum granule recirculating rates and ways to clean dirty grandules are studied. A preliminary economic comparison of the RFBF with a baghouse and an electrostatic precipitator is given, and a conceptual design of a scaled-up pilot size RFBF which can handle 4000 CFM air and withstand temperatures up to 500/sup 0/F has been given. The influence of electrostatic effects in fibrous and granular beds to separate charged dust particles in an electric field is studied. The results of experiments with charged particles are used to improve the filtration efficiency of the RFBF for fine dust particles in the size range 0.1 to 1 ..mu..m by passing the dusty gas through a corona charger placed at the entrance of the filter. Using precharged particles results in a significant enhancement of the filtration efficiency in the RFBF without an increase in pressure drop through the device and with only a minor complication in the construction of the filter.

• Research Organization: City Univ. of New York, NY (USA)
• OSTI ID: 6640970
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
FIBERS
FILTERS
FILTRATION
FLUE GAS
FLUIDIZED BEDS
GASEOUS WASTES
GRANULAR MATERIALS
MATERIALS
SEPARATION PROCESSES
WASTES