Energy-saving denitration device for cement dry kiln

The utility model discloses an energy-saving denitration device for a cement dry kiln. The energy-saving denitraion device for the cement dry kiln comprises a decomposition furnace 1, a cement kiln 2, a kiln head oxygen-enriched combustion-supporting coal-injection duct 3, a kiln tail oxygen-enriched combustion-supporting coal-injection duct 6, an oxygen-enriched conveying pipe 4, a pulverized coal conveying pipe 5, an oxygen-enriched preparation device 7, a pulverized coal preparation device 8, a reductant spray-head 9, and a reductant reserve unit 10. The reductant reserve unit 10 is connected with the reductant spray-head 9 through a pipe to stretch into the decomposition furnace 1. The tail of the cement kiln 2 is connected with the lower portion of the decomposition furnace 1. The oxygen-enriched preparation device 7 is connected with the kiln head oxygen-enriched combustion-supporting coal-injection duct 3 arranged on the kiln head of the cement kiln 2 through the oxygen-enriched conveying pipe 4. The p