Production of Soot by Oil Fired Domestic Heat Equipment

摘要

Results are presented on recent studies at Brookhaven National Laboratory on the particulate emissions from domestic oil burners. This work has emphasized systems with very low exit gas temperatures (e.g., 105/degree/F) which are currently being introduced into the market-place. These condensing systems are of a particular concern because they have wet heat exchanger surfaces which are more sensitive to fouling by soot; and secondly, due to the low exhaust temperatures these systems are often not self drafting which can lead to a smoke problem following shutdown. Finally, there is another trend towards using these systems with sidewall venting, and for this application cleaner combustion is generally desired. Two methods were used in this study to examine these emissions. The direct filtering of gas samples was used to determine cycle average emissions while a multipass light extinction method was used to examine startup and shutdown transients. It was found that startup and shutdown soot can contribute significantly to the total soot problem. A number of specific burner design features have been examined to minimize this soot production problem, and results of this work have shown that soot can be reduced in utilizing simple modifications of current designs. 10 refs., 13 figs. (ERA citation 14:005849)