Production process of high tower melt-granulated compound fertilizer

Abstract

The invention relates to a production process of a high tower melt-granulated compound fertilizer. Potassium chloride is added in the process of melting urea, and the temperatures of urine and slurry are reduced according to a characteristic that the melting temperature is reduced after the urea is mixed with the potassium chloride serving as a cosolvent. The liquid solid ratio of the slurry can be regulated so as to reduce the melting temperature of the urea, the melting capacity of urea melting equipment is improved, and the foundation for improving the yield is laid.

Description

technical field

[0001] The invention relates to a high-tower melt granulation compound fertilizer production process. Background technique

[0002] The general process of high-tower granulation: urea is measured and melted to make urine and sent to the mixing tank. Potassium chloride, ammonium phosphate and filling materials are sent to the mixing tank after being measured and treated. The powder material and urine are mixed in the mixing tank. Stir and mix thoroughly, flow into the differential granulation nozzle by gravity, and throw the mixed slurry out of numerous small droplets by the centrifugal force of the high-speed rotation of the nozzle, and the small droplets contact with the rising air in the tower in the process of falling in the granulation tower Heat exchange, small liquid droplets gradually solidify from liquid to solid particles with the drop of temperature, after cooling, screening, anti-caking treatment, packaging is the finished product.

[0003] There ...