Cleaning Flue Gas from Sewaqe Sludge Incinerators Usina an Electrostatic Precipitator and Polystage Chemical Scrubber

摘要

A study of a wet electrostatic precipitator (ESP) and chemi- cal scrubber for flue gas cleaning was conducted on the multiple hearth sewage sludge incinerator at the New England Treatment Company (NETCO) facility in Woonsocket, RI. The ESP achieved the highest removal rate for heavy metals and particulate matter to a submi- cron range, while the two-stage chemical scrubber was able to oxidize and dissolve the incoming NOx in the scrub- bing solutions. This paper describes the details of sewage sludge incineration systems, NOx emissions from a mul- tiple-hearth sludge incinerator, and the current regula- tory status; it also presents the results obtained from the commercial-scale ESP and the portable scrubber.