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Slow-release urea and production method thereof

A production method and slow-release urea technology are applied in fertilizer mixtures, fertilization devices, applications, etc., and can solve problems such as low nutrient utilization rate, land, environmental impact, resource waste, etc., and achieve low operating costs, elimination of excessive waste, The effect of slowing down the release speed

Active Publication Date: 2014-04-02
HENAN XINLIANXIN FERTILIZER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that the nutrient utilization rate of fertilizer farmland in my country is generally low at this stage, especially the nitrogen fertilizer use rate is only about 30%, which is far lower than the level of about 50% in developed countries in the world. The environment has a greater impact

Method used

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  • Slow-release urea and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] When making 1000 kg of the present invention, 30 kg of attapulgite powder, 1 kg of polyacrylamide, 1 kg of quartz stone powder and 968 kg of molten urea solution.

[0026] 1. Put 30 kg of attapulgite powder, 1 kg of polyacrylamide, and 1 kg of quartz stone powder into the slow-release agent feeding device 1 and mix them through the metering belt 2, slow-release agent tank 4 and powder pump 5 into the urea solution tank 6 Inside;

[0027] Two, 968 kilograms of molten urea solutions that come from evaporation system 8 in urea production are 968 kilograms of molten urea solutions that are more than 99.5% and enter in the urea solution tank 6 through the pipeline that flow meter 9 is installed;

[0028] Three, the sustained-release agent mixed in step 1 and the molten urea solution in step 2 are placed on the urea solution tank 6 and uniformly mixed, and the pressure of the urea solution tank 6 is 0.5MPa, and the temperature is 135°C;

[0029] 4. Put the mixed mixture in s...

Embodiment 2

[0032] When making 2000 kg of the present invention, 120 kg of attapulgite powder, 10 kg of polyacrylamide, 10 kg of quartz stone powder and 10 kg of molten urea solution.

[0033] 1. Put 120 kg of attapulgite powder, 10 kg of polyacrylamide, and 10 kg of quartz stone powder into the slow-release agent feeding device 1 and mix them into the urea solution tank 6 through the metering belt 2, the slow-release agent tank 4 and the powder pump 5 Inside;

[0034] Two, 1860 kilograms of molten urea solution that the concentration that comes from evaporation system 8 in urea production is more than 99.5% enters in the urea solution tank 6 by the pipeline that flow meter 9 is installed;

[0035] Three, the sustained-release agent mixed in step 1 and the molten urea solution in step 2 are placed on the urea solution tank 6 and uniformly mixed, and the pressure of the urea solution tank 6 is 0.55MPa, and the temperature is 140°C;

[0036] 4. Put the mixed mixture in step 3 into the gran...

Embodiment 3

[0039] When making 3000 kg of the present invention, 360 kg of attapulgite powder, 30 kg of polyacrylamide, 30 kg of quartz stone powder and 2580 kg of molten urea solution.

[0040] 1. Put 360 kg of attapulgite powder, 30 kg of polyacrylamide, and 30 kg of quartz stone powder into the slow-release agent feeding device 1 and mix them into the urea solution tank 6 through the metering belt 2, the slow-release agent tank 4 and the powder pump 5 Inside;

[0041] Two, 2580 kilograms of molten urea solution that the concentration that comes from evaporation system 8 in urea production is more than 99.5% enters in the urea solution tank 6 by the pipeline that flow meter 9 is installed;

[0042] Three, the sustained-release agent mixed in the step 1 and the molten urea solution in the step 2 are placed on the urea solution tank 6 and uniformly mixed, and the pressure of the urea solution tank 6 is 0.6MPa, and the temperature is 145°C;

[0043] 4. Put the mixed mixture in step 3 into...

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Abstract

The invention belongs to a slow-release urea, and in particular relates to a slow-release urea in which attapulgite powder, polyacrylamide and quartz limestone powder are taken as main slow-release preparations and a production method thereof. The slow-release urea consists of the following raw materials in parts by weight: 30-120 parts of attapulgite powder, 1-10 parts of polyacrylamide, 1-10 parts of quartz limestone powder and 860-968 parts of melt urea solution. The slow-release urea has the advantages of less investment, simple process, low operation cost and good slow release effect.

Description

technical field [0001] The invention belongs to slow-release urea, in particular to a slow-release urea with attapulgite powder, polyacrylamide and quartz stone powder as main slow-release agents and a production method thereof. Background technique [0002] China is currently the world's largest producer and user of fertilizers, and the amount of nitrogen fertilizer application is about 50 million tons per year. Studies have shown that the nutrient utilization rate of fertilizer farmland in my country is generally low at this stage, especially the nitrogen fertilizer use rate is only about 30%, which is far lower than the level of about 50% in developed countries in the world. The environment has a greater influence. Contents of the invention [0003] The object of the present invention is to overcome the defects in the prior art and provide a slow-release urea with low investment, simple process, low operating cost and good slow-release effect and a production method the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/08C05G3/90
Inventor 顾朝晖李玉顺刘伟刘锐杰乔杰宋仁委
Owner HENAN XINLIANXIN FERTILIZER