System using selective catalytic reduction for improving low-temperature De-NOx efficiency and reducing yellow plume

摘要

The present disclosure relates to a method for removing nitrogen oxides (NOx) more effectively at 300° C. or below in boilers, gas turbines, incinerators, diesel engines, glass melting furnaces, etc. by selective catalytic reduction (SCR). To this end, an oxidation catalyst is mounted in front of a NOx-reducing device based on selective catalytic reduction and the NOx composition, i.e. the ratio of NO:NO2, in the exhaust gas is adjusted to about 1:1, such that de-NOx catalytic reaction is carried out under optimized fast SCR condition and de-NOx efficiency at low temperature can be maximized.

主权项

1. A method for increasing de-NOx efficiency of exhaust gas and removing yellow plume at 300° C. or below, comprising:
providing a fixed oxidation catalyst and a moveable oxidation catalyst; and adjusting the NO2:NOx ratio of exhaust gas to 0.5 by moving the moveable oxidation catalyst so as to achieve fast selective catalytic reduction (SCR).