Fine particulate emissions: Flue gas conditioning for improved fine particle capture in fabric filters: (Task 3.6). Final technical report, April 1, 1987-March 31, 1988, including the quarterly technical progress report, January-March 1988.

摘要

Previous pilot-scale work at the University of North Dakota Energy & Mineral Research Center (EMRC) has shown that significant reductions in fine particle emissions from a fabric filter can be achieved by injecting small amounts of ammonia and sulfur trioxide (SO(sub 3)) upstream of the baghouse as conditioning agents. In addition, baghouse pressure drop is reduced because of an increase in dust cake porosity. The general objective of the work was to develop flue gas conditioning as a method of reducing fine particle emissions, and to explore the mechanisms by which the conditioning process reduces emissions and pressure drop. The work this past year has focused on the fundamentals of ash properties which control fine particle penetration through a fabric filter. The work has consisted of: (1) construction and setup of a bench-scale fabric filtration system, (2) tests with reentrained ash at ambient conditions to relate penetration behavior to coal type, ash characteristics, and conditioning, and (3) tests in which ammonia and SO(sub 3) were injected upstream of the bench-scale filter to determine conditioning effects and the effect of conditioning agent concentrations and temperature. 25 refs., 21 figs., 2 tabs. (ERA citation 15:034323)