Device for preparing ammonia through urea pyrolysis

The utility model relates to a device for preparing ammonia through urea pyrolysis. The device comprises an air intake pipeline, a diffusion section and a reaction chamber, which are sequentially connected and arranged in the vertical direction from top to bottom, wherein the lower end opening of the air intake pipeline is arranged in a manner of extending into the diffusion section. Through the adoption of the arrangement scheme, during the diffusion, hot airflow entering the device flows out of the air intake pipe extending into the diffusion section and then freely diffuses instead of being in direct contact with the inner wall of the diffusion section for the air. Therefore, the device for preparing ammonia through the urea pyrolysis, provided by the utility model, can effectively reduce the length of a pyrolysis reactor, lowers the requirements of a pyrolysis device on height and volume, and reduces the production cost.