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Aalborg Solutions No. 1 · August 2001 Prevention of soot fires Keeping the economizers clean will result in a longer lifetime of the plant, better operational economy and most importantly avoiding the risk of soot fires. Aalborg Industries recommends installing Ecoclean and Ecomon equipment to facilitate daily maintenance. General Operating in the tough marine environment, shipowners need to protect their valuable investments and ensure efficient operation of their fleet. Aalborg Industries has the solution to the growing problem of soot fires in exhaust gas economizers. a more active involvement of boilerThe problem has prompted some classification societies - like Norway’s Det Norske Veritas - to add further requirements to their rules for boiler/economizer installations on new ships. Such measures are expected to contribute to Once rare, fires in exhaust gas boilers and economizers have become a worrying and costly problem The underlying causes of the increase in soot fires are linked to a growing reliance on cheaper, low-grade fuel oils, resulting in Effects on flue gas temperature and gas pressure drop in an economizer with soot deposits. Flue gas temperature at economizer outlet (°C) Soot fire raging from the stack. Melt down as a result of soot fire. having increased by a staggering percentage and affecting all types and makes of exhaust gas economizers. makers, ship designers, shipbuilders and shipowners towards increasing safety onboard. more soot in exhaust gases. Another problem is the growing number of long-stroke diesel en- 260 255 250 245 240 235 230 225 220 215 0 Flue gas temperature Gas pressure drop 235 220 205 Gas pressure drop (mm WG) gines, which calls for larger quantities of lubrication oil, also adding to the soot build-up. 190 175 160 145 130 115 0,5 1 1,5 2 2,5 3 Soot layer thickness (principle) Ecoclean and Ecomon help keep your economizers clean Aalborg Industries has the solutions to minimise soot deposits and prevent damaging and expensive fires. At the heart of this are the Euroclean and Ecomon systems. Both systems are made to fit any type of exhaust gas boiler. The equipment is generally offered for installation on new boiler plants but unfortunately often decided The soot layer thickness has a direct effect on pressure drop and economizer outlet temperature.

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