Ammonia spraying pipeline and denitration ammonia spraying device

The utility model relates to the technical field of denitration ammonia spraying devices, in particular to an ammonia spraying pipeline and a denitration ammonia spraying device. The ammonia spraying pipeline comprises an ammonia spraying pipeline body, the nozzle is arranged on the ammonia spraying pipeline body and is communicated with the interior of the ammonia spraying pipeline body; the protective angle steel is arranged on the outer surface of the ammonia spraying pipeline body, is arranged at a near-wind end position where the flue gas flows to S2 relative to the nozzle, and is suitable for at least partially covering the nozzle; the section, perpendicular to the ammonia gas conveying direction S1, of the ammonia spraying pipeline body is of a water-drop-shaped structure; and the size of the maximum width part of the ammonia spraying pipeline body vertical to the flue gas flowing direction S2 is smaller than that of the maximum width part of the ammonia spraying pipeline body parallel to the flue gas