Combined process for exhaust gas aftertreatment and exhaust gas recirculation of a pressurized internal combustion engine

摘要

A method for cleaning engine exhaust, in particular from heavy oil-powered 2-stroke and 4-stroke large engines, the main exhaust gas flow being largely pre-cleaned of sulfur oxides and particles in a packed bed filter (40), characterized in that a partial exhaust gas flow that is extracted from the pre-cleaned main exhaust gas flow is fed as exhaust gas recirculation air via an exhaust gas recirculation air cooler (70) to a second fine particle cleaning stage (80) and is supplied to the engine combustion air by means of a compressor (90) arranged in the exhaust gas recirculation path, and that the fine particle cleaning stage (80) arranged in the exhaust gas recirculation path, consisting of filter cartridges (81), which is regenerated by means of a cleaning system (82) consisting of the compressed air tank (82a) and the compressed air blower pipe (82b) and generates a constant pressure loss.