Process for off-gas particulate removal and apparatus therefor

Patent · Wed Jan 01 04:00:00 EST 1997

OSTI ID:871192

Carl, Daniel E ^[1]

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1. Orchard Park, NY

In the event of a breach in the off-gas line of a melter operation requiring closure of the line, a secondary vessel vent line is provided with a particulate collector utilizing atomization for removal of large particulates from the off-gas. The collector receives the gas containing particulates and directs a portion of the gas through outer and inner annular channels. The collector further receives a fluid, such as water, which is directed through the outer channel together with a second portion of the particulate-laden gas. The outer and inner channels have respective ring-like termination apertures concentrically disposed adjacent one another on the outer edge of the downstream side of the particulate collector. Each of the outer and inner channels curves outwardly away from the collector's centerline in proceeding toward the downstream side of the collector. Gasflow in the outer channel maintains the fluid on the channel's wall in the form of a "wavy film," while the gas stream from the inner channel shears the fluid film as it exits the outer channel in reducing the fluid to small droplets. Droplets formed by the collector capture particulates in the gas stream by one of three mechanisms: impaction, interception or Brownian diffusion in removing the particulates. The particulate-laden droplets are removed from the fluid stream by a vessel vent condenser or mist eliminator.

• Research Organization: WEST VALLEY NUCLEAR SERVICES
• DOE Contract Number: AC07-81NE44139
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5679135
• OSTI ID: 871192
• Country of Publication: United States
• Language: English

Related Subjects

/95/96/
adjacent
annular
annular channel
annular channels
apertures
apparatus
atomization
breach
brownian
capture
centerline
channel
channels
closure
collector
concentrically
concentrically disposed
condenser
containing
containing particulate
containing particulates
curves
diffusion
directed
directs
disposed
disposed adjacent
downstream
droplets
edge
eliminator
event
exits
film
fluid
fluid stream
form
formed
gas
gas containing
gas line
gas stream
gasflow
impaction
inner
inner annular
inner channel
interception
line
maintains
mechanisms
melter
melter operation
mist
mist eliminator
off-gas
off-gas particulate
operation
operation requiring
outer
outer edge
outwardly
particulate
particulate collector
particulate removal
particulate-laden
particulates
portion
proceeding
process
provided
receives
reducing
removal
removed
removing
requiring
respective
ring-like
secondary
shears
stream
termination
utilizing
utilizing atomization
vessel
wall
water
wavy