SNCR (selective non-catalytic reduction) high-temperature denitration device

The utility model relates to an SNCR (selective non-catalytic reduction) high-temperature denitration device which comprises a mixing bin and a reaction bin, an air outlet is formed in the lower end of the mixing bin; the reaction bin is fixedly connected with the mixing bin, an air inlet and a medicine inlet are formed in one end of the reaction bin, a partition plate is fixedly connected in the reaction bin and used for dividing the space in the reaction bin into a first cavity and a second cavity, the first cavity is communicated with the air inlet, the first cavity is communicated with the mixing bin, and a conversion bin is fixedly connected in the second cavity. The conversion bin is communicated with the pesticide inlet, a spraying hole is formed in the partition plate, a spraying head is fixedly connected into the spraying hole, and the spraying head is used for being communicated with the conversion bin. Ammonia water is decomposed into ammonia gas more quickly through the spraying head, the gas inle