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NAFA Guide To Air Filtration

NAFA Guide To Air Filtration. Industrial Contaminant Air Filtration Control Systems presented by the National Air Filtration Association. Fifth Edition. Metal Working Fluids. Spinning chuck of a metalworking machine aerosolizes cooling fluids. Reason for Capture.

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NAFA Guide To Air Filtration

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  1. NAFA Guide To Air Filtration Industrial Contaminant Air Filtration Control Systems presented by the National Air Filtration Association Fifth Edition

  2. Metal Working Fluids Spinning chuck of a metalworking machine aerosolizes cooling fluids

  3. Reason for Capture • Fluids may be hazardous to people • Fluids may damage interior of facility/machine parts • Exhausting to outside may be illegal • Fluids can be captured and reused

  4. Challenges of Oil Mists and Smokes Collection

  5. Mist Removal Equipment Media type Centrifugal type

  6. Mist and Smoke Removal • Electrostatic precipitation works well for smoke and mist removal

  7. Welding Smoke Removal Welding smoke can be completely removed with correct design of a source capture hood, then filtered through Media or ESP air cleaners

  8. Cyclone Dust Separator Afterfilters – usually placed back inside the facility

  9. Baghouse Separator

  10. Jet Pulse Separator

  11. Summary • Metal working fluids are used to cool the machining process • Fluids can be straight, soluble, semi-synthetic or synthetic oils. • Mists are generally larger particles than smokes • Mists and smokes can be collected by media, centrifugal or electrostatic means and returned to the machine for reuse.

  12. Summary • Welding smoke is a mixture of fine particles and gases • Source capture on collectors depends on properly designed capture hoods • Cyclone, shaker & reverse pulse and jet pulse are all styles of dust separation equipment • Cartridge collectors are popular where space is limited

  13. Sample Questions Q. Metal Working Fluids are used to? Answer: To cool, lubricate and clean production parts Q. A typical Oil Mist electrostatic precipitator has what sections (inlet to outlet)? Answer: Baffle section Ionizer Section Collecting Section Fan section Optional After filter

  14. Sample Questions Dust Separation is used for two objectives? Answer: 1. Recover valuable product from plant processes that generate dust 2. Clean air to stay in compliance with OSHA & EPA requirements A baghouse is composed of? Answer: house, hopper(s), tubesheet and plenum.

  15. Thank you. Other Questions?

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