Production method for preparing tricalcium phosphate and coproducing special fertilizer for rye

Abstract

The invention relates to the technical field of chemical engineering, particularly a production method for preparing tricalcium phosphate and coproducing a special fertilizer for rye. The effective absorption amounts of nitrogen, phosphorus and potassium are analyzed according to the fertilizer demanded by the rye, and the contents of the elements in the production process are regulated and matched, so that the prepared combined-state compound fertilizer can maximally satisfy the demands of rye, thereby lowering the overhigh cost due to improper element matching in the compound fertilizer production and further avoiding the environment pollution due to solidification of the compound fertilizer since excessive elements are added into the soil. By adjusting the component contents of the filtrate, the waste liquid in the chemical product production process is used as the raw material for producing the compound fertilizer, thereby avoiding the discharge of the waste liquid and lowering the production cost of the compound fertilizer. The production method has obvious environmental protection value and economic benefit.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a production method for preparing special fertilizer for tricalcium phosphate by-product rye. Background technique [0002] Rye, rich in nutrition, contains starch, fat and protein, vitamin B, phosphorus, potassium and so on. In addition to being used as flour, it can also be used to make oil, wine, and raise livestock. The stalks are also used for weaving hats and making paper. Due to the large amount of rye leaves, soft stems, rich nutrition and good palatability, it can also be used as high-quality forage grass for cattle, sheep and horses. However, at present, when rye is planted, the fertilization of rye is to adopt traditional chemical fertilizers, such as urea, potassium chloride, ammonium nitrate, ammonium carbonate, ammonium chloride, etc., through a certain ratio, and then used for rye Fertilization for planting, it can be seen that this traditional rye fer...

AI Technical Summary

Problems solved by technology

However, at present, when rye is planted, the fertilization of rye is to adopt traditional chemical fertilizers, such as urea, potassium chloride, ammonium nitrate, ammonium carbonate, ammonium chloride, etc., through a certain ratio, and then used for rye Fertilization for planting, it can be seen that this traditional rye fertilizer is difficult to meet the nutrient requirements of rye, because it is reported that the absorption rate of nitrogen, phosphorus and potassium in fertilizers by crops is limited, and a large amount of nitrogen will remain Phosphorus and potassium elements in the soil waste a lot of nitrogen, phosphorus and potassium resources, cause environmental pollution, affect the structural layer of the soil, and then affect the yield and quality of rye planting

[0003] At the same time, in the preparation process of tricalcium phosphate products, it is usually produced by crystallization and precipitation. This process often requires deep crystallization of tricalcium phosphate, thereby reducing the waste of elemental resources such as nitrogen, phosphorus, and calcium. Increase the output of tricalcium phosphate and reduce production costs; but this deep crystallization will affect the purity of tricalcium phosphate products, and then affect the quality of tricalcium phosphate products; and the amount of waste liquid after crystallization treatment is large, and it is also will cause environmental pollution

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