Metering lance for introducing urea into an exhaust or flue gas stream to denitrogenate the gas comprises a mixing zone in which the urea is mixed with a carrier gas at a temperature below that of the gas stream

摘要

Metering lance for introducing urea into the exhaust or flue gas stream of a combustion unit comprises at least a first mixing zone in which the urea is mixed with a carrier gas, especially air, at a temperature below that of the exhaust or flue gas stream. An independent claim is also included for mixing urea with a carrier gas for denitrogenating the exhaust or flue gas stream of a combustion unit, where the mixture is introduced into the exhaust or flue gas stream with a metering lance, where mixing takes place at a temperature below that of the exhaust or flue gas stream.