SELECTIVE CATALYTIC REDUCTION SYSTEM

摘要

An embodiment of the present invention relates to a selective catalytic reduction system. The selective catalytic reduction system includes: a main passage through which exhaust gas passes; a reactor provided on the main passage and having a catalyst therein; a first opening/closing member installed on the main passage to switch the flow of the exhaust gas introduced into the reactor; a second opening/closing member installed on the main passage to switch the flow of the exhaust gas passing through the reactor; a circulation passage to connect one point between a front end of the reactor and the first opening/closing member with an opposite point between the second opening/closing member and a rear end of the reactor; a blower to circulate the exhaust gas between the reactor and the circulation passage; a carbon monoxide sensor to detect the concentration of carbon monoxide contained in the exhaust gas passing through the catalyst; and a control unit to control the first and second opening/closing members and the blower in order to reproduce the catalyst so that a catalyst reproduction operation can be performed. The control unit closes the first and second opening/closing members during the catalyst reproduction operation, actuates the blower, and terminates the catalyst reproduction operation when the detection value detected by the carbon monoxide sensor exceeds a preset carbon monoxide concentration.