REDUCTANT INJECTION AMOUNT CONTROLLING APPARATUS FOR SCR SYSTEM USED FOR SHIP OR OVERLAND PLANT

摘要

PURPOSE: A device for regulating the injection quantity of a reducing agent for a SCR(Selective Catalytic Reduction) system for ships or ground plants is provided to control the injection quantity of urea or ammonia injected into an exhaust line. CONSTITUTION: A device(1) for regulating the injection quantity of a reducing agent for a SCR(Selective Catalytic Reduction) system for ships or ground plants comprises a SCR unit(100), an air flow meter, a reducing agent supply unit(300), and an ECU(Electronic Control Unit)(500). The SCR unit denitrifies exhaust gas discharged from exhaust gas discharge equipment(C). The air flow meter is installed in an exhaust line(L) which connects the exhaust gas discharge equipment and the SCR unit. The air flow meter measures the speed or quantity of the exhaust gas discharged from the exhaust gas discharge equipment. The reducing agent supply unit supplies the reducing agents to the exhaust line between an exhaust gas flow measuring unit(200) and the SCR unit. The ECU controls the injection amount of the reducing agents using the information from the air flow meter.