Method for producing granular ammonium sulfate by using crystalline ammonium sulfate or powdery ammonium sulfate

A technology of crystalline ammonium sulfate and ammonium sulfate, applied in application, ammonium salt fertilizer, nitrogen fertilizer, etc., to achieve the effects of reducing ammonia loss, less nutrient deficiency, and saving energy consumption

Active Publication Date: 2010-02-17
WENGFU (GRP) CO LTD
View PDF1 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There is no report on the production of granular ammonium sulfate from crystalline ammonium sulfate or powdered ammonium sulfate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing granular ammonium sulfate by using crystalline ammonium sulfate or powdery ammonium sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] Embodiment The Wengfu Phosphate Fertilizer Plant under Guizhou Wengfu (Group) Co., Ltd. adopts the inventive method to produce granular ammonium sulfate:

[0021] (1) Add crystalline ammonium sulfate or powdered ammonium sulfate into the drum granulation dryer as a master batch, start the granulation dryer, and the master batch is formed under the rotation of the drum of the granulation dryer at a speed of 4.3r / mind material curtain or bed;

[0022] (2) the sulfuric acid that is 98% by mass fraction, the ammoniacal liquor that is 20% by mass fraction, the phosphoric acid that is 30% by mass fraction are mixed reaction in tubular reactor according to the ratio of 13:5:1:4 to generate 300 DEG C High-temperature slurry, under the pressure condition of 0.6MPa (gauge pressure), the reaction slurry is atomized through the nozzle and then sprayed onto the material curtain or material bed in the granulator, coated or bonded into granules. The temperature of the granulated mate...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for producing granular ammonium sulfate by using crystalline ammonium sulfate or powdery ammonium sulfate. The method comprises the following steps: (1) adding the crystalline ammonium sulfate or the powdery ammonium sulfate into a granulating drier, using as mother material and forming a material screen or a material bed under the rotation of a rotary drum; (2) mixing sulfuric acid, ammonia, phosphoric acid and washing liquid in a tubular reactor, reacting, generating high-temperature slurry, spraying the slurry on the material screen or the material bed in agranulating machine after atomizing, and coating or sticking into particles; (3) after dedusting, washing the tail gas with the phosphoric acid and recycling the washing liquid; returning the collected dust to the granulating machine; (4) sieving material produced by the granulating drier to obtain particles of 1-4mm, which is a finished product of the granular ammonium sulfate; and returning theparticles greater than 4mm after being crushed and the particles smaller than 1mm to the granulating drier and recycling. The method can raise the temperature of a granulating material layer by the high-temperature slurry, improve the granulation rate of the mother material, lower the material return ratio, wash the tail gas with the phosphoric acid, reduce the loss of the ammonia, dry a productby reaction heat and save energy consumption; the generated product has high strength and little loss of nutrient components.

Description

technical field [0001] The present invention relates to chemical fertilizer products, more specifically, to the production of ammonium sulfate, in particular to the method for producing granular ammonium sulfate. Background technique [0002] Sulfur is an intermediate nutrient element needed by crops. If sulfur cannot be replenished in time, it will seriously affect the yield of crops such as grain. Sulfur-containing fertilizers not only increase crop yields, but also improve product quality. Therefore, the demand for sulfur fertilizers and ammonium sulfate is increasing in the United States, Japan, Australia and other countries. Granular ammonium sulfate has a good market prospect because of its high sulfur content, convenient transportation and being suitable for blending with other fertilizers. [0003] Ammonium sulfate is a sulfur-nitrogen fertilizer with a long history of use. Its appearance is white or slightly yellow orthorhombic rhombic fine grains. Therefore, it is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C05G5/00C05C3/00
Inventor 黄进杨毅邱祖军饶轶晟梅通友张瑞赵邦杰张晓迁覃庆海
Owner WENGFU (GRP) CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap