Feasibility study for the reduction of odors at the outlet of a dust collector in a lead foundry (GA10)

ISSUE

A lead foundry located in an urban area has received complaints of unpleasant odors from neighbors in the vicinity of the plant. These odors are produced during the recycling and remelting of lead residues. The recycled lead pieces are often contaminated with oils, grease, plastic and rubber. During the remelt of lead in the crucible, these contaminants generate smelly off gas containing fumes and volatile organic compounds (VOCs).

TECHNOLOGICAL CHALLENGE

The mandate consists in elaborating solutions to ensure that the foundry complies with the air emission regulation of the municipality and no longer disturbs the neighbors with odors during recycling operations of lead residues.

RECOMMENDED SOLUTION

Four (4) different technologies were evaluated during this study to solve the odor problem at the dust collector stack. Of these four (4) technologies, odor neutralization has been identified as the most appropriate method in terms of cost, reliability and sturdiness.

RESULTS

The recommended solution is the injection of an odor suppressant with nozzles installed directly in the stack. It was also recommended to extend the dust collector stack to promote gas dispersion into atmosphere.