High-dispersion multiple slow release type stable urea, production device and production technology

Abstract

The invention belongs to urea containing graphene, a production device and a production technology. The urea is prepared from the following raw materials in parts by weight: 95-99 parts of a urea body, 0.01-0.05 part of graphene, 1-5 parts of water, 0.1-0.5 part of a dispersing agent and 0.1-0.5 part of an emulsifier, wherein the dispersing agent is one selected from sodium hexametaphosphate, sodium pyrophosphate, sodium dodecyl sulfate, methyl amyl alcohol, cellulose, polyacrylamide, guar gum or fatty acid polyethylene glycol ester, and the emulsifier is one selected from the polyacrylamide,xanthan gum, lignin, carboxymethyl cellulose, polyvinyl alcohol or dodecyl alcohol. The urea has the advantages that a plurality of nutrients can be provided for the growth of crops, the utilization rate of nitrogen is increased, absorption of chlorophyll by the crops is enhanced, and the rapid growth of the crops is promoted.

Description

technical field [0001] The invention belongs to the technical field of urea production, and in particular relates to a high-dispersion multiple slow-release stable urea, a production device and a production process. Background technique [0002] At present, the nitrogen fertilizer used in agriculture is mainly amide nitrogen urea. After the application of urea, it undergoes the action of urease and nitrase in the farmland and converts it into the form of ammonium nitrogen and nitrate nitrogen absorbed by crops, so as to be absorbed by crops to supplement nitrogen. the goal of. However, with the excessive application of nitrogen fertilizers, a series of negative impacts have been produced on the environment, such as ammonia volatilization, nitrogen oxide volatilization, and nitrate nitrogen leaching in farmland. Studies have shown that excessive fertilization of farmland has a certain correlation with the occurrence of frequent atmospheric smog in recent years, and urease in...

AI Technical Summary

Problems solved by technology

However, there are still many disadvantages in this stable fertilizer production process. For example, the melting point of NBPT is 58-60°C, which cannot be evenly added to urine for granulation. It must be wrapped outside the fertilizer granules, which increases the production cost of stable fertilizers; The process makes NBPT directly exposed to the air during storage, which greatly reduces the shelf life of stable fertilizers; the half-life of NBPT in soil is about 7 days. In order to ensure the effect of stable fertilizers, the addition of NBPT is increased, which greatly improves the stability of fertilizers. Raw material cost of non-toxic fertilizers; NBPT has pungent smell and toxicity, and it is wrapped naked outside the fertilizer granules, which has potential production occupational health risks and use safety risks

Although the above method has solved some problems, there are still problems such as narrow product application, potential safety hazards in production and use, and high cost, which is not conducive to industrialized production and popularization and application.

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