Laboratory Evaluation of Stainless Steel Filters for Control of Particulate Emissions.

摘要

This research developed a method to control particulate emissions from Army demilitarization furnaces by developing high temperature filters capable of capturing particulate emissions, including the heavy metal PM2.5. Custom manufactured stainless steel filters were evaluated in a filter test setup based on American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) and American Society for Testing and Materials (ASTM) standard protocols used to characterize flat panel filters. Experimental studies using an in-house testing system on pressure drop versus flow rate, particle penetration, and dust holding capacity were performed for each filter. Experimental results showed that, as the quantity of dust increases, pressure drop increases linearly. In the presence of dust, a cake layer forms reducing effective pore size and therefore increasing the filter efficiency. Preliminary results showed that these filters offer a reusable, easily cleanable, cost-effective, and compact particulate filtration system for the Army mobile and stationary combustion systems. Future research is recommended to determine compatibility of the filter material to the operating temperature, pressure, air superficial velocity, and other physicochemical conditions, and whether modifying the filter system by coating with ad-sorbent material and tack polymers may enhance the separation of metals and other fine particulates.