Production method for preparing diammonium hydrogen phosphate and byproduct special fertilizer for oats

Abstract

The invention relates to the technical field of chemical engineering, and particularly relates to a production method for preparing diammonium hydrogen phosphate and a byproduct special fertilizer for oats. The fertilizer requirements of oats are analyzed, and the defects in processing steps in the preparation of an ammonium dihydrogen phosphate product are analyzed, so that the preparation processes of the special fertilizer for oats and the ammonium dihydrogen phosphate product are combined, and the two irrelevant processes are made complementary, thereby increasing the added value in the preparation process of the ammonium dihydrogen phosphate product, improving the purity of the ammonium dihydrogen phosphate product, saving element resources such as nitrogen, phosphorus and the like, and reducing the discharge amount of waste liquor; and nutritive elements in the waste liquor produced in the preparation process of the ammonium dihydrogen phosphate product are controlled and regulated, so that the elements such as nitrogen, phosphorus and the like in the waste liquor can satisfy growth requirements of oats, the purity of the ammonium dihydrogen phosphate product is increased to 93% or above, the residual nitrogen and phosphorus elements in the waste liquor are reduced, and the discharge amount of the waste liquor is reduced. Thus, the production method has remarkable environmental protection value and economic benefits.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a production method for preparing a special fertilizer for oat by-product diammonium hydrogen phosphate. Background technique [0002] Oat is a grass plant, which is called naked oat in China, commonly known as oil wheat, jade wheat, brome, and wild wheat. It is a low-sugar, high-nutrition, high-energy food. Oatmeal is rich in dietary fiber, which can promote gastrointestinal motility, facilitate defecation, low in calories, low glycemic index, lowering lipids and blood sugar, and is also one of the high-end supplements. It is an indispensable dry food in poor areas. According to a comprehensive analysis by the Institute of Health, Chinese Academy of Medical Sciences, Chinese naked oat contains 15.6% crude protein, 8.5% fat, and starch releases heat and elements such as phosphorus, iron, and calcium. The water-soluble dietary fiber in oats is 4.7 times and 7.7 times th...

AI Technical Summary

Problems solved by technology

[0004] At the same time, in the preparation process of diammonium hydrogen phosphate products, hot-process phosphoric acid and wet-process phosphoric acid are usually used, but no matter whether hot-process phosphoric acid or wet-process phosphoric acid is used to prepare ammonium dihydrogen phosphate products, there will be a large amount of impurity elements in the process Pure, the purity of the ammonium dihydrogen phosphate product prepared is relatively poor, and the ammonium dihydrogen phosphate product prepared by hot-process phosphoric acid or wet-process phosphoric acid often also needs to be reduced by deep crystallization treatment in the crystallization treatment step. The waste of raw material elements saves raw material resources, reduces the production cost of ammonium dihydrogen phosphate products, and reduces the discharge of waste liquid. However, this process will bring other impurities into ammonium dihydrogen phosphate during deep crystallization, which will affect the production of ammonium dihydrogen phosphate. The purity of the product, without deep crystallization, the output of ammonium dihydrogen phosphate product is low, and a large amount of nitrogen and phosphorus resources will be wasted, resulting in an increase in production costs

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