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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 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 • 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
Mist Removal Equipment Media type Centrifugal type
Mist and Smoke Removal • Electrostatic precipitation works well for smoke and mist removal
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
Cyclone Dust Separator Afterfilters – usually placed back inside the facility
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.
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
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
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.
Thank you. Other Questions?