Ammonia spraying device and flue gas denitration device

The utility model relates to the technical field of environmental protection, in particular to an ammonia spraying device and a flue gas denitration device.The ammonia spraying device comprises an ammonia spraying pipeline, the ammonia spraying pipeline is suitable for being horizontally arranged in a flue, the cross section of the ammonia spraying pipeline is in a drop shape, the ammonia spraying pipeline comprises two symmetrically-arranged arc edges, the upper ends of the two arc edges are connected to form a sharp point, and the lower ends of the two arc edges are smoothly connected; the distance between the upper end and the lower end of each arc edge is a long axis, the connecting line of the largest distance between the two arc edges is a short axis, the short axis is perpendicular to the flowing direction of flue gas in the flue, and the long axis is parallel to the flowing direction of the flue gas in the flue; and the nozzle is arranged on the ammonia spraying pipeline. Due to the fact that the shor