| abstract |
In order to overcome the limitations and problems that earlier methods for the partial removal of contaminants from a process gas stream have experienced, the following method steps are proposed: - conveying the process gas stream (12; 30; 44; 59; 72; 85) to an inlet of a scrubber (10; 38; 52; 63; 74; 93), in particular of a horizontal wet spray scrubber (10; 74), - distributing the process gas stream (12; 30; 44; 59; 72; 85) evenly across the inlet of the scrubber (10; 38; 52; 63; 74; 93), in particular evenly throughout the width of the inlet of the scrubber (10; 38; 52; 63; 74; 93), - providing a plurality of process gas streams partitioned from one another at the inlet of the scrubber (10; 38; 52; 63; 74) or before entering the scrubber (93), in particular forming at the inlet of the scrubber (10; 38; 74) a flow pattern of a plurality of process gas streams partitioned from one another, - feeding ozone (21; 32; 46; 61; 76; 91) into contact with selected ones of the partitioned gas streams in the scrubber (10; 38; 52; 74; 93) or downstream of the scrubber (63) to oxidize contaminants in the partitioned gas streams, in particular for treating a preselected percentage of the process gas stream (12; 30; 44; 59; 72; 85) entering the scrubber (10; 38; 52; 63; 74; 93), - removing the oxidized contaminants - from the selected partitioned gas streams and recombining the selected partitioned gas streams at least substantially free of contaminants with the remaining partitioned gas streams containing contaminants, or from, after recombining the selected partitioned gas streams with the remaining partitioned gas streams, from the recombined gas stream. |