Full water-soluble phosphorus nitrogen fertilizer production device

The utility model relates to a full water-soluble phosphorus nitrogen fertilizer production device. Comprising a powdery fertilizer grade monoammonium phosphate storage tank, the powdery fertilizer grade monoammonium phosphate storage tank is connected with a fully-soluble grade monoammonium phosphate liquid storage tank through a heating and filtering unit, and an outlet of the fully-soluble grade monoammonium phosphate liquid storage tank is connected with a granulation unit through a synergist tank and a tubular reactor; the heating and filtering unit comprises a heating and filtering part, the heating and filtering part comprises a first liquid preparation tank, the top of the first liquid preparation tank is connected with a fertilizer-grade monoammonium phosphate conveying pipeline and a desalted water pipeline respectively, the bottom of the first liquid preparation tank is connected with an inlet of a first plate-and-frame filter, and a liquid phase outlet of the first plate-and-frame filter is connec