The emission of Hazardous Air Pollutants (HAPs) from aircraft painting and depainting operations will soon be subject to the aerospace national emission standards for hazardous air pollutants (NESHAP). HAP emissions from large-aircraft paint/depaint facilities in the Air Force (AF) can be categorized into high-flow low-concentration (HFLC) streams. Exhaust air flowrates can be as high as 500,000 cfm, and concentration of the pollutant is typically less than 150 ppm. A number of conventional and emerging technologies exist that can effectively treat the pollutant. But the cost of treating HFLC air streams is prohibitive. The key to cost reduction in such cases lies in flow reduction. This paper will present integrated approaches to emission control that result in cost-effective solutions. The main strategy of the integrated approach is flow-reduction. However, each facility can be unique and will present a new challenge to flow reduction. This paper also presents a methodology for evaluating the optimum cost of control of HFLC for a given facility. The optimization process involves maximization of pollutant removal with the best available technology, and minimization of the overall cost. It will be shown that this methodology can be extended to other similar operations such as aircraft and vehicle painting operations. Data from a case study on an actual AF depainting operation will be presented.
Integrated approach for the control of VOC and air toxic emissions from aircraft painting/depainting operations in the U.S. Air Force
1998
Seiten
Conference paper
English
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