High efficiency virtual impactor

Patent · Thu Mar 27 04:00:00 EST 1980

OSTI ID:6692950

Loo, B W

Environmental monitoring of atmospheric air is facilitated by a single stage virtual impactor for separating an inlet flow (Q/sub 0/) having particulate contaminants into a coarse particle flow (Q/sub 1/) and a fine particle flow (Q/sub 2/) to enable collection of such particles on different filters for separate analysis. An inlet particle acceleration nozzle and coarse particle collection probe member having a virtual impaction opening are aligned along a single axis and spaced apart to define a flow separation region at which the fine particle flow (Q/sub 2/) is drawn radially outward into a chamber while the coarse particle flow (Q/sub 1/) enters the virtual impaction opening.

• DOE Contract Number: W-7405-ENG-48
• Assignee: Dept. of Energy
• Patent Number(s): None
• OSTI ID: 6692950
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AERIAL MONITORING
AEROSOLS
AIR FILTERS
AIR POLLUTION
CHEMICAL ANALYSIS
COLLOIDS
CONTROL EQUIPMENT
DISPERSIONS
EFFICIENCY
EQUIPMENT
FILTERS
MONITORING
NONDESTRUCTIVE ANALYSIS
PARTICLES
POLLUTION
POLLUTION CONTROL EQUIPMENT
SOLS
X-RAY EMISSION ANALYSIS
X-RAY FLUORESCENCE ANALYSIS