A kind of production method of preparing potassium dihydrogen phosphate by-product tobacco special fertilizer

Abstract

The invention relates to the technical field of chemical engineering, in particular to a production method of special tobacco fertilizer serving as a byproduct of preparation of monopotassium phosphate. The special tobacco fertilizer serving as the byproduct prepared from waste liquid obtained by preparation of the monopotassium phosphate by a wet method is produced by detecting and analyzing the element content of the special tobacco fertilizer and an effective absorption form and an effective absorption amount of tobaccos to nitrogen, phosphorus and potassium elements and adjusting and matching the element content in a technical production process; the matching contents of a large quantity of nutritional elements such as nitrogen, phosphorus and potassium are adjusted, so that excessive nutritional elements are prevented from being introduced into soil, and the environmental pollution caused by solidification of composite fertilizer and blocking of the soil is avoided; furthermore, the phenomenon that the composite tobacco fertilizer is extremely high in production cost due to element mis-matching is also avoided; the production method is obvious in environment-friendly value and high in economical benefit.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a production method for preparing potassium dihydrogen phosphate by-product tobacco special fertilizer. Background technique [0002] Nitrogen, phosphorus, and potassium are essential nutrients for plant growth. The uptake of nitrogen by plant roots is mainly in the inorganic form [NH 4 + ] and [NO 3 - ]; Phosphorus mainly in the form of [H 2 PO 4 - ] form is taken up by plants; potassium dissociates in water into [K + ], absorbed by plant roots. Urea is an organic nitrogen fertilizer, which needs to be hydrolyzed into ammonium carbonate or ammonium bicarbonate by the action of urease in the soil before it can be absorbed and utilized by crops. [0003] At the same time, potassium dihydrogen phosphate is a kind of potassium dihydrogen phosphate that can be applied in fields such as industry and agriculture, and has a wide range of uses. For example, in the ind...

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Problems solved by technology

[0009] At the same time, there is also a technology for preparing compound fertilizers for crops, but there is no technical solution for combining elements in the compound fertilizer preparation process according to the needs of crops and making compound fertilizers in a compound state. Tobacco is a relatively special economic crop; there is no literature found in the process of preparing potassium dihydrogen phosphate products by the reaction of phosphoric acid and urea, the waste of a large amount of potassium dihydrogen phosphate products caused by incomplete crystallization of potassium dihydrogen phosphate, And the excessive crystallization of potassium dihydrogen phosphate will contain a large amount of impurities, and then the purity of the potassium dihydrogen phosphate product is not enough, and the technical problems that are difficult to eliminate in the conversion of a large amount of waste liquid are solved.

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