Removing nitrogen oxides from waste gas from an annealing and pickling line by selective catalytic reduction comprises using flue gas from the annealing furnace to heat off-gas from the pickling section

摘要

Removing nitrogen oxides from the waste gas from an annealing and pickling line comprises using flue gas from the annealing furnace to heat off-gas from the pickling section before the off-gas is subjected to selective catalytic reduction. An independent claim is also included for an annealing and pickling line comprising an annealing furnace, a pickling section and a selective catalytic reduction (SCR) unit connected to the off-gas system of the pickling section, comprising a device for combining the flue gas from the furnace with the off-gas upstream of the SCR unit.