Patent ID: 8893484

Claim:
A solid SCR system comprising: a solid state reductant; a container storing the solid state reductant; an exhaust pipe fluid-connected to the container and receiving gas state reductant converted from the solid state reductant; a SCR catalyst disposed on the exhaust pipe; an exhaust heat recovery device containing the exhaust pipe therein and recovering waste heat from exhaust gas exhausted through the exhaust pipe, wherein the exhaust heat recovery device includes a partition extending in an upstream direction of the exhaust gas for guiding the exhaust gas within the exhaust heat recovery device, and wherein a first hole is formed to the exhaust pipe under the partition to receive the exhaust gas; a heat exchanger connected to the inside of the exhaust heat recovery device and the inside of the container and supplying the recovered heat to the solid state reductant in the container, wherein the heat exchanger includes a circulation pipe passing through a space formed between the exhaust gas pipe and the partition and under the partition and fluid-connecting the exhaust heat recovery device and the container, wherein the space is fluid-connected to the first hole, and wherein heat transfer fluid circulates in the circulation pipe; and a flow control valve disposed within the exhaust pipe inside the exhaust heat recovery device for selectively supplying the exhaust gas to the inside of the exhaust heat recovery device, wherein a second hole is formed on the exhaust pipe in rear of the flow control valve.