Sintering and pelletizing flue gas SCR denitration and dioxin removal apparatus

The invention discloses a sintering and pelletizing flue gas SCR denitration and dioxin removal apparatus. The apparatus mainly comprises a heat exchange device for the primary heating of a flue gas for processing, a secondary heating device, a reaction device for the SCR denitration and dioxin removal of the flue gas, and an ammonia-air supply device arranged between the heat exchange device and the SCR reaction device, wherein a smoke outlet of the SCR reaction device is connected with a thermal medium inlet of the heat exchange device. The apparatus has the advantages of high efficiency, low ammonia escape rate, effective mitigation of poisoning caused by the wearing and obstruction of a catalyst by dusts in the flue gas, effective solving of a technical bottleneck that effective nitrogen removal cannot be realized because of the too low temperature of the sintering and pelletizing flue gas out of a normal work temperature range of a denitration catalyst, recovery of flue gas discharging heat, running cost