Method for removing contaminants from exhaust gases

摘要

In a method for removing a portion of contaminants, such as nitrogen oxides, from an exhaust gas stream of a combustion process, the exhaust gas stream is separated into two or more gas streams. At least one of the two or more gas streams is treated first by mixing with ozone. The treated gas stream is then fed to a scrubber where it is recombined with the untreated gas stream. Excess ozone present in the treated gas stream is consumed by oxidation of contaminants in the untreated gas stream before the combined gas stream is released to the atmosphere. The portion of the gas stream separated for mixing with ozone directly correlates to the amount of nitrogen oxides that are desired to be removed from the stream.

主权项

1. A method for the partial removal of contaminants from a process gas stream comprising the steps of:
separating a process gas stream into at least two process gas streams, feeding ozone into contact with at least one of the separated process gas streams to oxidize the contaminants in the gas stream, and feeding at least one of the process gas streams contacted by ozone to a scrubber for removal of the oxidized contaminants from the gas streams.