Fiber bed mist collectors ideally suited for removing sub-micron aerosols and mists

Fiber Bed Oil Mist Collectors

Ideally suited for removing sub‑micron aerosols and mists with high efficiency coalescing filters

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The Monroe Fiber Bed Oil Mist Collector is a custom designed unit consisting of a continuous-duty, aerosol coalescing filter and integral fan assembly. Mist is collected using filter elements consisting of micro-fine fiberglass or synthetic fibers. This compacted media is in the form of cylindrical units. These long-life filters can provide several years of service before replacement is necessary. When the mist contains heavy droplets and/or dust particles, pre-filtering is provided by separate filter screens. Efficiencies of 99.5% on 0.3 micron mists are typical.

High Performance Fiber Bed Filter

Fiber Bed self-draining filter

Many industrial, chemical, and food processing applications generate sub-micron mists. The Monroe Fiber Bed Oil Mist Collector, developed after lengthy research and testing, is an ideal solution for these troublesome mists. Mist particles are efficiently removed through interception, inertial impact, diffusion (Brownian movement) and gravitational sedimentation.

The Monroe Fiber Bed Oil Mist Collector removes particles as fine as 0.3 micron. While normal filters permit these particles to re-entrain into the outgoing clean air, Monroe’s self-draining filter is designed to prevent oil re-entrainment and recirculate clean air to the atmosphere.

Monroe carefully selects fiber bed filters to give constant efficiencies as high as 99.99% on all mist particles.

Fiber Bed Oil Mist Collectors: The Monroe Advantage

The Monroe Fiber Bed Oil Mist Collector design provides the following advantages and benefits:

  • Heavy gauge steel is used for most installations, but special construction materials are available to meet specific applications. Welded seams and built-in lifting hooks provide rugged durability.

  • Large easy to open access doors, each with air-tight seals, for all serviceable areas.

  • An AMCA rated fan on the outlet side of the collector with either a direct coupled motor or a “V” belt drive.

  • Quiet operation. Flexible duct connections, fan mounting isolators, sound attenuators and fan enclosures are available.

  • Integral pressure gauges are available to indicate when filter maintenance is required.

  • Complete electrical controls to meet customer requirements are available.

System Design — Fiber Bed Collector

Fiber Bed Oil Mist Collector

The Monroe Fiber Bed Oil Mist Collector is available in capacities from 500 to 50,000 CFM in a single unit and may be integrated with existing duct work.

The Monroe Fiber Bed Oil Mist Collector is well suited for many oil mist applications including high production machining, asphalt fumes and synthetic fiber processing.

Custom Built Fiber Bed Units

For special applications, when mist is generated at high temperatures, Monroe provides custom designed condensing heat exchangers. Gas to air or gas to water heat exchangers are offered, depending upon application.

Multi-Stage Compact Units

For heavy duty operations where the mist is dirty or dust-laden, or when large oil droplets exist, Monroe provides multi-stage filtration with various pre-filtering elements followed by the fiber bed filters.

Filtration Efficiency

Fiber Bed Mist Collector filter diagram

The mist particles in the Monroe Fiber Bed Oil Mist Collector are deposited on the filter in four ways:

  1. Gravitational sedimentation occurs for heavier particles or droplets in the first stage and for coalesced droplets in the final stage.
  2. Inertial impaction. Particles are unable to adjust quickly enough to the abruptly changing streamlines in the vicinity of fibers (greater than 3 microns).
  3. Interception. Particles follow a gas stream line that comes within one particle radius of the surface of the fiber (1 to 3 microns).
  4. Diffusion or Brownian movement greatly enhances the submicron particles tendency to attach themselves to fibers due to their random movement (less than 1 micron).

Compact Fiber Bed Oil Mist Collector: Low-Profile, Reduced Footprint Design

The Monroe Compact Fiber Bed Oil Mist Collector is a custom designed unit consisting of a continuous-duty, aerosol coalescing filter, fan assembly and, when needed, an optional pre-filter stage. Mist is coalesced in a deep box filter consisting of micro-fine fibers. These long-life filters can provide years of service before replacement is necessary.

When the mist quantity is high and/or dust particles are present, pre-filtering is provided by separate filters. The Monroe Compact Fiber Bed Oil Mist Collector is available in capacities as low as 500 CFM in a single unit and may be integrated with existing duct work. The Monroe Compact Fiber Bed Oil Mist Collector is well suited for many oil mist applications including asphalt fumes, sulfuric acid mist, and synthetic fiber processing.

  • Fiber bed filtration
  • Oil, mist, smoke and vapor
  • Acid mist and fumes
  • Efficiencies to 99.5% by weight for < 3 microns
  • Efficient multi-stage design
  • Low pressure drop and energy requirement
  • Small footprint, low height requirement
  • Continuous draining during operation
  • Low maintenance
  • Lightweight, easy to remove filters
  • Machine mounting capabilities
Compact Fiber Bed Mist Collector

Fiber Bed Oil Mist Collector Applications

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