Filter bag seams as a source of particulate matter (PM) emissions

NESHAP standards have been finalized and enforcement dates set. In terms of Particulate Matter (PM), there will be significant reductions in the emissions limits allowed by federal legislation. The new standards of less than 0.07 lb/ton of clinker in existing baghouses (and 0.02 lb/ton in new sources) will stretch the performance limits of current filters. To achieve these new limits it will be important to identify all potential sources of PM emissions. For the fiberglass-backed membrane filter bags typically used in cement kiln baghouse applications, the seam area of the bag can be a significant source of PM leakage. The purpose of this paper is to share results of recent field trials in which membrane filter bag seams have been sealed to achieve lower PM emissions levels. A model for predicting filter bag failure modes is offered to assist cement producers in identifying which baghouses may benefit the most from this technology development.