Compound methionine granulation process:

1. The return of each solid feedstock and system from the batching system is fed to a drum granulator.

2. The washing solution of concentrated sulfuric acid, dilute phosphoric acid and exhaust gas scrubbing system from each storage tank is metered and added to the mixing section of the tubular reactor for mixing and dilution.

3. The ammonia from the ammonia station is metered and reacted rapidly with the mixed acid after the distribution by the distributor. The high-temperature ammonium sulfate and monoammonium phosphate solution are uniformly sprayed onto the granulator bed through the atomizing nozzle.

4. After the gas ammonia and steam are mixed and vaporized, the mixed distributor enters the material layer, and the monoammonium phosphate and the superphosphate in the material layer continue to react in the granulator, and the reaction heat is released, and the wet and dry materials are released. Agglomerated into granules under the action of the granulator.

5. Transfer to the rotary dryer for heat exchange with heat from the hot blast stove.

6. Transfer to the hot sieving to sort the granules. The fine granules are directly returned to the drum granulator. As the core, they continue to participate in the cohesion of the granules into balls. The large granules are crushed by the pulverizer and returned to the drum granulator to continue to participate. Into the ball.

7. The screened semi-finished granules are transported to a rotary chiller to cool the fertilizer by natural cold air or strong cooling air.

8. The qualified products after screening are transported to the coating machine for coating.

9. Transfer to the fully automatic packaging scale for weighing, packaging and storage.

10. Drying, cooling and vacuuming exhaust gas are treated by cyclone dust collector, gravity sedimentation chamber and water bath method respectively.

This article describes compound fertilizer, acid method, granulation, Shandong Huasheng Heavy Industry Co., Ltd.