| 摘要 |
A process is disclosed for mixing a fluid stream (F) with a large flow-rate gas stream (2), in particular for introducing a reducing agent into flue gas containing nitrogen oxides, in which process the large flow-rate gas stream impinges against the inflow side of at least one disk-like mixer element (1; 8) arranged at an angle against the direction of flow, and across which eddy currents (3) are formed, and the fluid stream is added to the large flow-rate gas stream downstream from the mixer element. In order to mix the fluid stream more completely with the large flow-rate gas stream, the fluid stream is added in the form of a swirling flow (7; 10). For that purpose, the swirling fluid flow is preferably led on the outflow side (8b) (lee side) of the mixer element (8) substantially perpendicularly to the mixer element (8) and substantially towards the centre (M) of the mixer element, and the fluid enters the eddy current from the centre of the mixer element, past its outflow side. However, it is also possible for the swirling fluid flow to be led on the inflow side (la) (windward side) substantially perpendicularly to the mixer element (1) and to exit through an opening (8) located substantially in the centre (M) of the mixer element, on the outflow side (lb) (lee side) of the mixer element, and for the fluid to enter the eddy current from the centre of the mixer element, past the outflow side. The invention is also directed to a corresponding device. |
