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Preparation device and application of a dual-function slow-release nitrogen fertilizer

A preparation device and dual-function technology, which is applied in the direction of fertilization device, application, fertilizer mixture, etc., can solve the problems of easy water absorption and disintegration fertilizer efficiency, uneven distribution of components, safety and pollution, etc., achieve wide development and application prospects, increase additional Value, the effect of long release period

Active Publication Date: 2018-02-02
SHANGHAI RES INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the use of urea-formaldehyde polymers as a binder basically solves the safety and pollution problems in the manufacture and application of granular fertilizers, the ammonium chloride-urea-formaldehyde granular fertilizers prepared by this method also have uneven distribution of components in the particles , easy to absorb water and disintegrate, causing large fluctuations in fertilizer efficiency and other problems

Method used

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  • Preparation device and application of a dual-function slow-release nitrogen fertilizer
  • Preparation device and application of a dual-function slow-release nitrogen fertilizer

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A preparation device for dual-function slow-release nitrogen fertilizer, comprising:

[0042] Material pretreatment component A: including urea-formaldehyde heating polymerization parts and ammonium chloride-urea-formaldehyde heating mixing parts composed of pipelines in series;

[0043] Drum granulation-drying integrated machine component B, its structure is as follows figure 2 Shown: It includes the induced draft fan, the drum granulation cylinder, the rotary drying cylinder and the hot blast stove which are arranged on the base and connected in sequence through pipelines. The rotary drum granulation cylinder and the rotary drying cylinder are respectively equipped with first The transmission system and the second transmission system, the drum granulation cylinder and the rotary drying cylinder are installed on the base obliquely;

[0044] Gas-filled elastic sulfur wrapping component C: includes a nitrogen heater, a high-speed shear stirring heater and a sulfur wrap...

Embodiment 2

[0052] Utilize the application of the preparation device of a kind of dual-function slow-release nitrogen fertilizer described in embodiment 1, its technical process is as follows figure 1 shown, including the following steps:

[0053] (a) Add urea, formaldehyde and additives with a molar ratio of 1:1 to 4.5:1 to the urea-formaldehyde heating polymerization part, heat to 60°C to 80°C, and react and polymerize to obtain a liquid urea-formaldehyde polymer;

[0054] (b) putting the liquid urea-formaldehyde polymer into the ammonium chloride-urea-formaldehyde heating mixing part, and feeding a certain amount of ammonium chloride, the quality of the liquid urea-formaldehyde polymer being 5% to 25% of the ammonium chloride consumption, Heat to 70°C-90°C, stir and mix to obtain the mixed material;

[0055] (c) The mixed material is introduced into the drum granulation cylinder, and the rotating speed of the drum granulation cylinder is adjusted to 10rpm-60rpm through the first speed...

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Abstract

The invention relates to a production device of double-function slow-release nitrogen fertilizer and application of the production device. The production device comprises a material preprocessing component, a rotary drum pelleting-drying all-in-one machine component and an aerated elastic sulfur wrapping component which are sequentially connected through pipelines. By the production device using the rotary drum pelleting-drying all-in-one machine component as the core, the double-function slow-release nitrogen fertilizer is produced by allowing liquid urea formaldehyde to bond with ammonium chloride serving as the main raw material so as to perform joint pelleting to form cores wrapped by the aerated elastic sulfur. Compared with the prior art, the production device has the advantages that the produced double-function slow-release nitrogen fertilizer is long in slow-release period, and nitrogen release amount can change along with soil water content; the production device is safe, efficient, simple and economic, the production device can be organically combined with the process flow of the double-function slow-release nitrogen fertilizer, and the product can greatly increase the additional value of ammonium chloride which is the main byproduct of Hou's process for soda manufacture.

Description

technical field [0001] The invention relates to the field of nitrogen fertilizer production, in particular to a preparation device and application of a dual-function slow-release nitrogen fertilizer. Background technique [0002] The soda ash industry is one of the cornerstones of the entire chemical industry, and it can be called the "mother of chemical industry". At present, the main processes for producing soda ash in the world include the Solvay method (by-product calcium chloride) and the combined soda production method (Hou's soda production method, by-product chlorine Ammonium chloride). Because of the high atomic utilization rate of the combined soda production method, the by-product ammonium chloride can be used as ammonium nitrogen fertilizer, which is more widely used in China. At present, the domestic production capacity of ammonium chloride is about 20 million tons / year , the actual annual output has also reached about 10 million tons / year. Such a high-yield amm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00
Inventor 刘刚储德韧张小沁
Owner SHANGHAI RES INST OF CHEM IND
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