A solid reducing agent selective catalytic reduction system

The present invention discloses a solid reductant SCR system, the exhaust gas includes a processor, a controller, a solid ammonia storage means, the gas rail, the first and second switches, wherein the solid ammonia storage means by the first a processor in communication with the exhaust gas conduit, the solid ammonia storage means through a second conduit in communication with the gas rail, the third rail gas delivery tube and the exhaust gas conduit in communication through the exhaust feed pipe to transport off-gas to the exhaust processor, the first switch disposed in the first pipeline, the second switch disposed in the third pipeline, said controller with said first switch and the second switch is connected. It is able to provide a smooth ammonia.