A grid 500 for distributing and mixing fluids in a duct 222 includes a plurality of lances 510 arranged in a first plane and configured to be positioned transverse to a direction of a first fluid flowing outside of the lances and within a predetermined flow area. Each of the plurality of lances 510 has at least one first inlet 511 and a plurality of outlet nozzles 555. One or more of the outlet nozzles is directed generally in the flow direction F of the first fluid outside of the lances, and is configured to discharge a second fluid therefrom.