For PM emission control in high temperature exhaust streams, such as those from fuel oil boilers, common dedusters like bag filters, have very high maintenance costs. The diesel and fuel oil fly ash can be quite sticky and clog to filter elements, which can be minimized with costly protection reagents or frequent filter elements changes. Fuel gas cooling is needed in front of the filter when temperatures are higher than 200ºC.
Regular cyclones and multicyclones, if used as final dedusting system, are frequently not able to comply with current emission limits.
Clients' needs include a very high efficient final dedusting system at a reasonable price, robust enough to operate for many years without significant maintenance or operating costs and avoiding production downtime.