Preparation method of urea melt absorption-release synchronous nitrogen fertilizer

A technology of nitrogen fertilizer and quick-acting nitrogen fertilizer, which is applied in fertilization equipment, fertilizer mixture, application, etc., can solve the problems of inability to supply nitrogen, low utilization rate of nitrogen fertilizer, fast release speed, etc., and achieve labor cost reduction, low water content, and ratio scientific effect

Inactive Publication Date: 2011-11-16
安徽省天享肥业有限责任公司
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Problems solved by technology

[0002] At present, the domestically produced nitrogen fertilizers are mainly ammonium chloride, urea, ammonium bicarbonate, and ammonium sulfate. These nitrogen fertilizers have low utilization rates and large losses. They either release quickly in the early stage or release quickly in the later stage, and cannot supply nitrogen according to the staged growth of crops. elements, and there will also be a large loss of

Method used

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  • Preparation method of urea melt absorption-release synchronous nitrogen fertilizer
  • Preparation method of urea melt absorption-release synchronous nitrogen fertilizer

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Embodiment Construction

[0020] Below in conjunction with example and accompanying drawing, the invention process is explained, the preparation method of urine melting absorption and release synchronous nitrogen fertilizer, concrete technological operation steps are as follows:

[0021] (1) Pour the formaldehyde urea into the receiving port, lift it to the silo through the bucket elevator, and then transport it to the formaldehyde urea melter. The molten urine flows to the buffer tank, is measured by a flow meter, and is sprayed to the preheating by a high-pressure spray gun. On the pulverized material in the drum granulator, the formaldehyde urea is 100 parts by weight.

[0022] (2) The quick-acting nitrogen fertilizer and filler (solid control agent) - bentonite and polyaluminum chloride are respectively measured, and the bucket is lifted to the stirring plate and transported to the pulverizer, and then transported to the drum granulator for granulation. 800 parts by weight of quick-acting nitrogen ...

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Abstract

The invention provides a preparation method of a urea melt absorption-release synchronous nitrogen fertilizer. The method comprises the following steps: formaldehyde and urea are used to melt, a flowmeter is used for metering, then a high pressure sprayer is used to spray the molten urea solution into a drum granulator and perform liquid drum granulation on the preheated and ground quick-acting nitrogen fertilizer and solid control agent, and the absorption-release synchronous nitrogen fertilizer is formed after drying, cooling and screening. By adopting the fertilizer, the nitrogen release rate is basically synchronous to the nitrogen absorption rate in each stage of the whole growing process of the crop, the utilization rate is up to 65%-80%, more than 90% of nitrogen which is not absorbed can not be lost, the soil environment can be protected and the biochemical characters of soil environments and soil can be protected; and the fertilizer has the function of preserving nutrient and water. The technology of the invention is easy to improve and convenient to operate.

Description

technical field [0001] The invention relates to a preparation method of absorbing and releasing synchronous nitrogen fertilizer, and belongs to the technical field of fertilizers. Background technique [0002] At present, the nitrogen fertilizers produced in China are mainly ammonium chloride, urea, ammonium bicarbonate and ammonium sulfate. These nitrogen fertilizers have low utilization rates and large losses. They are either released quickly in the early stage or in the later stage. Nitrogen cannot be supplied according to the needs of crop growth. , and there will be a lot of loss. The nitrogen absorption and release synchronization fertilizer is formulated according to the soil testing formula and the nitrogen requirements of different crops, and can meet the nitrogen demand of each stage of the whole process of crop growth, so as to achieve the basic synchronization of nitrogen supply and crop absorption, and the utilization rate of the current season. Up to 65%-80%, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 郭康泽
Owner 安徽省天享肥业有限责任公司
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