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Production method and production line of nitrogen and potassium-containing double slow-release compound fertilizer

A dual slow-release and production method technology, applied in the field of agricultural biology, can solve problems such as environmental pollution, economic loss, loss and waste of nutrient elements, and achieve the effects of high absorption efficiency, improved utilization rate, and slowed loss rate

Inactive Publication Date: 2018-11-06
广东隆戈尔生态技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the loss and waste of nutrient elements in chemical fertilizers not only brings huge economic losses to the society, but also causes serious environmental pollution. Therefore, it is particularly important to improve fertilizer utilization, reduce fertilizer application, and save fertilization labor.

Method used

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  • Production method and production line of nitrogen and potassium-containing double slow-release compound fertilizer

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Embodiment 1

[0018] The production method of described nitrogen-containing potassium double slow-release compound fertilizer comprises the following steps:

[0019] (1) Add the weighed urea into the reaction kettle, add water and stir to dissolve it, the amount of water added is 1.5-4.0 times the mass of urea; use borax and potassium hydroxide to adjust the pH to 8-9, according to the molar ratio of urea to formaldehyde 1.2- 1.5:1 Add formaldehyde solution with a mass fraction of 37%, stir and react at 75-80°C for about 60 minutes;

[0020] (2) Add oxidized starch with a mass of 8% to 10% of urea, and stir for 15 to 20 minutes; use acidic substances to adjust the pH of the reaction kettle solution to 4.0 to 4.5, and continue to stir and react at 85 to 90°C for 30 to 60 minutes; then use alkaline The substance adjusts the pH to neutral to obtain a slow-release binder; the stirring speed is preferably 45-55r / min to obtain a slow-release binder with a suitable viscosity; the acidic substance ...

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Abstract

The invention relates to a production method of nitrogen and potassium-containing double slow-release compound fertilizer. The method includes the following steps: (1) adding urea to a reactor, addingwater, stirring; adjusting pH to 8-9 with borax and potassium hydroxide, adding 37% of formaldehyde solution according to a molar ratio of 1.2-1.5 of urea to formaldehyde, reacting under stirring at75-80 DEG C for about 60 min; (2) adding oxidized starch, wherein the mass of oxidized starch is 8%-10% of the urea, stirring for 15-20 min; adjusting the pH of the reaction solution with an acidic substance to 4. 0-4. 5, reacting under stirring at 85-90 DEG C for 30-60min; adjusting the pH to neutrality with an alkaline substance to obtain a slow-release binder, wherein the stirring speed is 45-55 r / min, thus obtaining a slow-release binder with appropriate viscosity; and (3) injecting urea formaldehyde into an absorption tank containing potassium sulfate from the reactor, continuing the reaction to transform milky matter into creamy white agglomerate, and performing centrifugation-drying-pulverization-grading and sieving.

Description

technical field [0001] The invention relates to the field of agricultural biotechnology, in particular to a production method and production line of a nitrogen- and potassium-containing double slow-release compound fertilizer. Background technique [0002] Since the extensive application of chemical fertilizers, revolutionary changes have taken place in the planting industry, which has increased the agricultural products of the world several times. However, the loss and waste of nutrient elements in chemical fertilizers not only brings huge economic losses to the society, but also causes serious environmental pollution. Therefore, it is particularly important to improve fertilizer utilization, reduce fertilizer application, and save fertilization labor. In 1924, a slow-release compound fertilizer (MU) made by condensing urea and formaldehyde and then compounding it with monoammonium phosphate and potassium fertilizer was successfully developed by the German BASF company, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
CPCC05C9/02C05D1/02
Inventor 陈军林梅洁人陈瑞清龙婷
Owner 广东隆戈尔生态技术有限公司
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