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Title: Process for off-gas particulate removal and apparatus therefor

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 diffusionmore » in removing the particulates. The particulate-laden droplets are removed from the fluid stream by a vessel vent condenser or mist eliminator.« less
Inventors:
 [1]
  1. (Orchard Park, NY)
Issue Date:
OSTI Identifier:
871192
Assignee:
United States of America as represented by United States (Washington, DC) WVDP
Patent Number(s):
US 5679135
Contract Number:
AC07-81NE44139
Research Org:
WEST VALLEY NUCLEAR SERVICES
Country of Publication:
United States
Language:
English
Subject:
process; off-gas; particulate; removal; apparatus; event; breach; line; melter; operation; requiring; closure; secondary; vessel; provided; collector; utilizing; atomization; particulates; receives; gas; containing; directs; portion; outer; inner; annular; channels; fluid; water; directed; channel; particulate-laden; respective; ring-like; termination; apertures; concentrically; disposed; adjacent; edge; downstream; curves; outwardly; centerline; proceeding; gasflow; maintains; wall; form; wavy; film; stream; shears; exits; reducing; droplets; formed; capture; mechanisms; impaction; interception; brownian; diffusion; removing; removed; condenser; mist; eliminator; particulate removal; particulate collector; gas containing; disposed adjacent; fluid stream; gas stream; concentrically disposed; outer edge; melter operation; inner channel; inner annular; mist eliminator; operation requiring; off-gas particulate; containing particulate; utilizing atomization; gas line; annular channel; annular channels; containing particulates; /95/96/