| 摘要 |
The invention relates to a device for afterburning of exhaust air by means of a burner (04), having a fuel nozzle (07) and a burner cone (06), wherein at least the burner cone (06) of said burner (04) protrudes in a raw gas chamber (09) into an exhaust stream (02) of exhaust air from an upstream system (12) which is to be treated. The burner cone (06) is surrounded by exhaust air and forms a pre-mixing chamber (42) in the interior, wherein the burner cone (06) has a single or multi-part wall (43) enclosing the pre-mixing chamber (42) and having one or a plurality of wall sections (43.1; 43.2; 43.3; 43.4). The fuel nozzle (07) comprises an opening of at least one fuel outlet (44) for output of fuel into the pre-mixing chamber (42) and is enclosed by the wall of the burner cone (06) at least at the height of the at least one fuel outlet (44). The wall (43) bordering the pre-mixing chamber (42) on the shell side to the outside has a structure such that the pre-mixing chamber (42) formed in the interior thereof opens in a funnel shape to at least one conical longitudinal section, symmetrically to an axis of symmetry (S) defining the axial direction of the burner (04), in the downstream direction, wherein the burner (04), in a bottom (49) of the burner cone (04) on the face which encloses the fuel nozzle (07) and/or the at least one fuel outlet (44), has one or a plurality of openings of one or a plurality of feedthroughs (48) leading into the pre-mixing chamber (42) from the raw gas chamber (09) surrounding the burner (04), through which exhaust air from the raw gas chamber (09) surrounding the burner (04) enters and/or can enter into the pre-mixing chamber having an axial or primarily axial flow direction, that is, a greater axial flow component relative to the radial component. |
