Multi-element compound diammonium phosphate and production method and system thereof

Abstract

The invention discloses a production method of multi-element compound diammonium phosphate, which comprises the following steps of: mixing ammonia and concentrated phosphoric acid in a preneutralization device to obtain a solution with diammonium phosphate; heating elementary sulphur with hot vapor to melt the elementary sulphur; delivering the solution, ammonia, nutritive salt and molten elementary sulphur into a pelletizer in an preset order for carrying out the palletizing operation on the nutritive salt, the solution, ammonia and molten elementary sulphur to form a multi-element compound diammonium phosphate combination; and drying and screening the multi-element compound diammonium phosphate combination by using a dryer and a classifier to obtain multi-element compound diammonium phosphate. The invention also provides a production system of multi-element compound diammonium phosphate and the multi-element compound diammonium phosphate.

Description

Technical field: [0001] The invention relates to the field of diammonium phosphate production, in particular to a method and system for producing multi-element composite diammonium phosphate and the multi-element composite diammonium phosphate. Background technique: [0002] Diammonium phosphate is a high-concentration quick-acting fertilizer, which is suitable for various crops and soils, especially for nitrogen-loving and phosphorus-demanding crops. It can be used as base fertilizer or top dressing, and it should be applied deeply. [0003] However, the existing diammonium phosphate is very easy to be lost in a short time after being applied to the soil, for example, the ways of loss are leaching, gas loss and immobilization. In this way, because the existing diammonium phosphate has a single composition and lacks weight elements and trace elements, the crops cannot obtain sufficient nutrients, which in turn leads to a reduction in the quality and yield of agricultural pro...

AI Technical Summary

Problems solved by technology

[0003] However, the existing diammonium phosphate is very easy to be lost in a short time after being applied to the soil, for example, the ways of loss are leaching, gas loss and immobilization.

In this way, because the existing diammonium phosphate has a single composition and no weight elements and trace elements, the crops cannot obtain sufficient nutrients, which in turn leads to a reduction in the quality and yield of agricultural products produced by the crops.

Images