Method for producing industrial-grade ammonium dihydrogen phosphate and co-producing water-soluble fertilizer

Abstract

The invention provides a method for producing industrial-grade ammonium dihydrogen phosphate and co-producing a water-soluble fertilizer. According to the present invention, based on the characteristics of the industrial monoammonium mother liquor, waste is turned into treasure; the method is used for producing the high-end fertilizer water-soluble fertilizer; and with the method, the high-end utilization rate of nutrients is increased, the added value of the product is increased, the benefits of the industrial-grade ammonium dihydrogen phosphate and water-soluble fertilizer coupled co-production device are maximized, and the coupled production of the industrial-grade ammonium dihydrogen phosphate and the water-soluble fertilizer is finally achieved.

Description

Technical field: [0001] The invention belongs to the technical field of agricultural fertilizers, and in particular relates to a production method of industrial-grade ammonium dihydrogen phosphate for co-production of water-soluble fertilizers. Background technique: [0002] According to the data of the National Agricultural Technology Extension Service Center of the Ministry of Agriculture, my country uses 6% of the world's water resources, 9% of the arable land and 30% of the chemical fertilizers. At the same time, it produces 26% of the agricultural products and feeds 18.84% of the global population. Huge, water shortage is more serious than land shortage. my country's irrigation water is about 3.6×1012m 3 / a, the gap is greater than 3.0 × 1011m3 / a, and the irrigation water production efficiency is 1kg / m 3 , which is only about 50% of that of the United States, Israel and other developed countries; the annual consumption of chemical fertilizers in my country exceeds 5400...

AI Technical Summary

Problems solved by technology

At the same time, there are similar studies in the United States, but there is no relevant report on the production of industrial monoammonium phosphate

In 2009, Yuntianhua International Chemical Co., Ltd. Zhuang Yanping and others conducted a pilot test on the production process of wet-process phosphoric acid, and finally developed a process for producing industrial-grade monoammonium phosphate by aging wet-process phosphoric acid, but there was no relevant report on industrialization

However, in this technological route, the direct utilization rate of phosphorus pentoxide and nitrogen is low, the average direct utilization rate of phosphorus pentoxide is lower than 60%, the average direct utilization rate of nitrogen is lower than 70%, and the direct utilization rate of phosphorus pentoxide is lower than 70%. Phosphorus and nitrogen are mostly used in the form of industrial monoammonium mother liquor for low-nutrient phosphate fertilizers and compound fertilizers as raw materials

[0004] At present, the production process of water-soluble fertilizer is relatively chaotic, and most of them are produced by physical blending of industrial-grade single nitrogen, phosphorus and potassium source raw materials. Mechanical blending of various materials leads to poor material uniformity and high production raw material costs.

Most of the production equipment is intermittent operation and simple and small, and the stability of product quality is not good

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