SYSTEM FOR SELECTIVE CATALYTIC REUCTION AND METHOD FOR SELECTIVE CATALYTIC REDUCTION

摘要

The present invention relates to a selective catalytic reduction system for reducing a nitrogen oxide (NOx) contained in an exhaust gas discharged by an engine. The selective catalytic reduction system according to an embodiment of the present invention includes: a main exhaust flow path where the exhaust gas containing the nitrogen oxide (NOx) flows; a reactor which is installed on the main exhaust flow path and includes a catalyst to reduce NOx contained in the exhaust gas; a reducing agent spraying part which sprays a reducing agent to the exhaust gas which will flow into the reactor; a concentration sensor which measures NOx concentration contained in the exhaust gas passing through the reactor; and a control part for controlling the amount of the reducing agent sprayed of the reducing agent spraying part.