ABSTRACT
This chapter is concerned with the dust generated in processing operations that is not collected through a primary exhaust or control system. Such emissions normally occur within buildings and are discharged to the atmosphere through forced- or natural-draft ventilation systems. Industrial fugitive emissions contribute more than 50% of the total suspended and inhalable emissions. In addition, these particulates frequently contain toxic or hazardous substances. Fugitive particulates can be controlled by three basic techniques: process modification, preventive measures, and add-on capture and removal equipment. Most industrial process, fugitive particulate emissions are controlled by capture and collection or industrial ventilation systems. These systems have three primary components: a hood or enclosure to capture emissions that escape from the process; a dry dust collector that separates entrained particulates from the captured gas stream; and a ducting or ventilation system to transport the gas stream from the hood or enclosure to the APCD.
