Accession Number:

ADA371932

Title:

Hazardous Waste Minimization of Paint Overspray Via Medialess Dynamic Particle Filtration

Descriptive Note:

Final rept. 25 Apr 97-25 Jan 98

Corporate Author:

INNOVATECH INC DURHAM NC

Personal Author(s):

Report Date:

1998-03-25

Pagination or Media Count:

59.0

Abstract:

A novel medialess dynamic particle filtration technique extending patented Boundary Layer Momentum Transfer BLMT technology, removes sticky aerosols without contaminating mechanical collection media. In this filter, incoming air passes through boundary layers generated on parallel stacks of rotating disks, excluding particles larger than a critical size, and allowing their agglomeration and collection. Because no paint solids accumulate on the rotating surfaces, flow, back pressure and filtration efficiency remain constant. It thus met the two project goals of decreasing HazWaste generation and removing paint as well as a conventional arrestor. An 800-ACFM prototype BLMT, spinning 180 eight-inch-diameter disks at 4,000 RPM, excluded 98 by mass of a directly sprayed aerospace paint without fouling. In combination with a downstream volatile organic compound VOC control unit, this BLMT device will abate hazardous paint overspray emissions at or below Clean Air Act standards. Paint solids may be recovered for recycling. unlimited scale-up is feasible using multiple modular devices, which can also tailor air movement. Projected annual operating and initial acquisition costs for a 25,000-ACFM BLMT system are - 35 less than for an equivalent, conventional three-stage filter system.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Air Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE