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

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...

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