Device for denitration of medium temperature flue gas SCR of cement kiln tail

The utility model discloses a medium temperature flue gas SCR denitrification facility of cement kiln tail, including cement kiln tail pre-heater, waste heat power boiler, reductant supply system, reductant injection apparatus, cyclone, medium temperature denitrification facility, afterbody fan and cement kiln tail high temperature fan. Denitrification facility arranges after exhaust-heat boiler, and the high cloud of dust gas of high temperature that comes from kiln tail pre-heater carries out waste heat utilization via waste heat power boiler, and flue-gas temperature and dust concentration reduce the back to some extent, gets into processings of gathering dust of cyclone dust collection ware, and dust concentration further reduces in the flue gas, and by the passing through to arrange before the cyclone dust collection ware that the reductant injection apparatus on the pipeline sprays reductant to the flue in and gets into the medium temperature denitrification facility who is equipped with the catalyst together and carry out the denitration after of reductant supply system supply, on the afterbody fan was with the preoral pipeline of clean fume emission to cement kiln tail high temperature fan income, the final purification flue gas entered low reaches equipment