Coating urea production system

The invention provides a coating urea production system. The coating urea production system comprises a coating liquid conveying system and a urea conveying system, the film coating liquid conveying system comprises a film coating liquid storage tank, a conveying pipeline and a spraying assembly arranged on the conveying pipeline which are connected in sequence; a film coating power pump and a pressure adjusting system used for controlling the spraying amount of the film coating liquid are arranged on the conveying pipeline, and the pressure adjusting system comprises the following control parameters: the power air pressure is 0.35-0.6 Mpa, and the pump outlet pressure is 0.25-0.5 Mpa; the urea conveying system comprises a conveying belt and a stirring device arranged on the conveying belt, the modified urea is of a core-shell structure, urea particles serve as an inner core, modified attapulgite and polyvinyl alcohol serve as middle coating layers, and a starch-acrylonitrile grafted copolymer serves as a she