Device for preparing slow-release nitrogen fertilizer from modified zeolite and method for preparing slow-release nitrogen fertilizer by using same

A technology for modifying zeolite and nitrogen fertilizer, applied in fertilization equipment, nitrogen fertilizer, application and other directions, can solve the problems of limited ion adsorption performance, limited fertilizer industrialization development, and insufficient use of zeolite slow-release materials, etc., and achieve high ion exchange and adsorption. performance, reduced soil nutrient loss, low cost effect

Pending Publication Date: 2018-09-18
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these studies are still based on zeolite as a matrix, and the role of zeolite as a slow-release material has not been fully utilized, and the adsorption performance of natural zeolite on ions is limited, which also limits its fertilizer industrialization development.

Method used

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  • Device for preparing slow-release nitrogen fertilizer from modified zeolite and method for preparing slow-release nitrogen fertilizer by using same
  • Device for preparing slow-release nitrogen fertilizer from modified zeolite and method for preparing slow-release nitrogen fertilizer by using same
  • Device for preparing slow-release nitrogen fertilizer from modified zeolite and method for preparing slow-release nitrogen fertilizer by using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] see figure 1 and 2 , a device for preparing slow-release nitrogen fertilizer based on natural zeolite, consisting of a pulverizer 1, a first conveyor belt 2, an adsorption reaction tank 3, a first dryer 4, a second conveyor belt 5, a disc granulator 6, and a second dryer 7. The third conveyor belt 8, the drum fluidized bed 9, the fourth conveyor belt 10, and the weighing bagging machine 11 are connected.

[0023] The upper end of the adsorption reaction pool 3 is provided with a reaction pool feed port 2 , the middle part is provided with stirring teeth 13 , and the lower end is provided with a reaction pool discharge port 14 . The upper part of the disc granulator 6 is equipped with a modified zeolite feed port 15 and a binder feed port 16 respectively. The drum fluidized bed 9 is provided with a first control switch 171, a second control switch 172, a third control switch 173, a fourth control switch 174 and a fifth control switch 175, and the first control switch 1...

Embodiment 2

[0026] Embodiment 2 Application of the device of the present invention in the preparation of zeolite-based slow-release nitrogen fertilizer

[0027] 1) Natural mordenite and clinoptilolite are mixed in a mass ratio of 1:1, mechanically pulverized by a pulverizer 1, passed through a 100-mesh sieve, and then enter the adsorption reaction pool 3 through the first conveyor belt 2, and the copper chloride solution with a mass fraction of 15% is passed through The reaction tank feed port 12 enters the adsorption reaction tank 3, the mass ratio of zeolite and copper chloride solution is 1:7-10, the mixed solution is stirred at room temperature by the stirring teeth 13 for 6 hours and then left to stand for 2 hours, repeating this process 3 times, removing After the supernatant, the zeolite precipitate is dried by the first dryer 4 to prepare metal chloride modified zeolite powder;

[0028] 2) Mix the above-mentioned modified zeolite powder with the granulation aid powder passed throu...

Embodiment 3

[0033] 1) Natural mordenite and clinoptilolite are mixed in a mass ratio of 1:1, mechanically pulverized by a pulverizer 1, passed through a 100-mesh sieve, and then enter the adsorption reaction pool 3 through the first conveyor belt 2, and the copper chloride solution with a mass fraction of 15% is passed through Feed inlet 12 enters adsorption reaction tank 3, the mass ratio of zeolite and copper chloride solution is 1:7, the mixed solution is left to stand for 2 hours after being stirred at room temperature by stirring teeth 13 for 6 hours, repeat this process 3 times, after removing the supernatant Drying the zeolite precipitate through the first dryer 4 to prepare metal chloride-modified zeolite powder;

[0034] 2) Mix the above-mentioned modified zeolite powder with the granulation aid powder passed through a 100-mesh sieve in a mass ratio of 85:15, and put them into the Carry out granulation in the disc granulator 6;

[0035] 3) After the above-mentioned granulated ze...

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Abstract

The invention discloses a device for preparing a slow-release nitrogen fertilizer from modified zeolite and a method for preparing a slow-release nitrogen fertilizer by using the device, and belongs to the technical field of fertilizer production. The device is constructed by connecting a crusher, a first conveyor belt, an adsorption reaction tank, a first dryer, a second conveyor belt, a disc granulator, a second dryer, a third conveyor belt, a drum fluidized bed, a fourth conveyor belt and a weighing and bagging machine. According to the device disclosed by the invention, ammonia gas and liquid urea are taken as nitrogen sources, and natural zeolite is modified firstly with a metal chloride solution, thereby remarkably enhancing the nitrogen adsorption performance. The ammonia gas and urea are evenly adsorbed into the microporous structure and the surface of the modified zeolite by vacuum pumping, and the modified zeolite adsorbs tightly with a nitrogen source, thus bringing the slowrelease performance of the modified zeolite into full play. Meanwhile, the zeolite has higher ion exchange and adsorption performance, so that excess nitrogen nutrients in soil can be adsorbed aroundzeolite lattices, soil nutrient loss is reduced, the utilization efficiency of the nitrogen fertilizer is improved, the agricultural pollution is reduced effectively.

Description

technical field [0001] The invention belongs to the technical field of fertilizer production, and in particular relates to a device for preparing slow-release nitrogen fertilizer from modified zeolite and a method for preparing slow-release nitrogen fertilizer by using the device. Background technique [0002] my country's fertilizer consumption is large (about 60 million tons, accounting for 1 / 3 of the world's total), but the fertilizer utilization rate is low (about 30%, 1 / 2 of that of European and American countries), leading to increasing agricultural non-point source pollution and pressure on resources and the environment . Recent studies have shown that the research and development of new slow / controlled release fertilizers can basically synchronize the nutrient release rate with crop nutrient absorption, which can greatly improve fertilizer utilization efficiency and reduce agricultural non-point source pollution, which meets the requirements of the national sustainabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05C3/00C05G3/00C05G5/12C05C9/00C05D9/00C05D9/02
Inventor 曹小闯金千瑜朱练峰张均华禹盛苗朱春权
Owner CHINA NAT RICE RES INST
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