Avgasefterbehandlingsanordning och förfarande för efterbehandling av avgaser

摘要

The invention relates to an exhaust post-treatment device (2) for a vehicle (4) adapted to reducing nitrogen oxides present in the exhaust gases (20) of the vehicle (4) by supply of liquid reducing agent (18) to the exhaust gases (20) in an exhaust pipe (32), which device (2) is adapted to locally warming a surface (31) within the exhaust pipe (32) by means of a Peltier element (6) by using thermal energy from the exhaust gases (20) to vaporise liquid reducing agent (18) which reaches the surface (31), and thereby avoid formation of deposits of reducing agent within the exhaust pipe (32). The invention relates also to a method for post- treatment of exhaust gases from vehicles with an exhaust post-treatment device (2) comprising a Peltier element (6).