Inlet assembly for an abatement apparatus

An inlet assembly 100 for an abatement apparatus comprises an effluent stream inlet conduit 120 extending between an inlet 130 receiving an effluent stream 220 and an outlet 140 in fluid communication with a treatment chamber of the abatement apparatus. A lance 150 is located within the inlet conduit, with a lance wall 160 defining a lance conduit 170 extending between a lance inlet 180 receiving a combustion reagent 230 and a lance outlet 190. The lance wall comprises an aperture 210 delivering a first proportion of combustion reagent into the inlet conduit to pre-mix with the effluent stream. The lance outlet delivers a second proportion of combustion reagent into the inlet conduit to mix with the pre-mixed effluent stream before it is delivered to the treatment chamber. The lance may be coaxially located within the inlet conduit and may share an elongate axis with the effluent stream inlet. The apertures may be located closer to the lance inlet than the lance outlet. The apertures may be located circumferentially around the lance wall and at different positions along the elongate axis. The lance conduit may narrow at a discontinuity 200 in the lance wall.