Production system of water-soluble compound fertilizer and production method

A production system and compound fertilizer technology, which is applied in the direction of urea compound fertilizer, alkaline orthophosphate fertilizer, nitrogen fertilizer, etc., can solve the problems of reduced water solubility of products, poor particle uniformity, and easy caking of products, so as to achieve effective utilization High efficiency, good product strength, and high primary utilization

Inactive Publication Date: 2018-07-24
武汉环绿时代环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] (1) The product strength is low, usually less than 25N, and the moisture content is greater than 5%, resulting in high subsequent drying pressure and easy agglomeration of the final product;
[0010] (2) In general, it is necessary to add additional binders (such as cla

Method used

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  • Production system of water-soluble compound fertilizer and production method
  • Production system of water-soluble compound fertilizer and production method
  • Production system of water-soluble compound fertilizer and production method

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Embodiment 1

[0040] see Figure 1-4 , the embodiment of the present invention provides a water-soluble compound fertilizer production system, the system includes a granulation section, a post-treatment section, a tail gas treatment section, and a feed and return section, etc., the post-treatment section, the tail gas treatment section and the feed and the return section connection; the aforementioned structure is basically the same as the existing compound fertilizer production system, the difference is that the granulation section in the present invention includes a drum granulation device and ammonium phosphate pretreatment tanks, regulating Tank and tubular reactor 3, the ammonium phosphate pretreatment tank is used to dissolve ammonium phosphate (technical ammonium or agricultural ammonium) by using the washing liquid of the tail gas treatment section, and the regulating tank is used to adjust the temperature, viscosity and density of the ammonium phosphate slurry, etc. parameters to e...

Embodiment 2

[0059] On the other hand, the embodiment of the present invention also provides a production method of water-soluble compound fertilizer, the method adopts the production system of embodiment 1 for production, and the adjustment tank adjusts the ammonium phosphate slurry to a slurry density of 1.33-1.38g / cm³, the moisture content is greater than 35%, the temperature is adjusted to 120-135°C, and the adjustment tank adjusts the slurry to facilitate the flow reaction of the tubular reactor and facilitate spraying. The degree of neutralization in the tubular reactor 3 is 0.45-0.48 (slightly excess sulfuric acid), and the particle size of the ejected core particles is 1.5-2.5mm. The reaction in the tubular reactor 3 not only provides heat to make the slurry boil (the temperature is greater than 160°C), but also can synthesize ammonium sulfate and ammonium phosphate to obtain relatively round core particles with suitable size and strength. The neutralization degree in drum 1 is 0....

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Abstract

The invention discloses a production system of water-soluble compound fertilizer and a production method, and belongs to the technical field of production of compound fertilizer. The production systemcomprises a granulation section, an aftertreatment section, a tail-gas treatment section and a feeding and returning section, wherein the granulation section comprises a roller granulation device, anammonium-phosphate pretreatment groove, a regulating groove and a tubular reactor, and the ammonium-phosphate pretreatment groove, the regulating groove and the tubular reactor are connected in sequence by pipelines; the roller granulation device comprises a roller obliquely arranged in a front-rear direction, a feeding port at the front end of the roller, a discharging structure at the rear endof the roller, an acid mixer extending into the front part of the roller from the front part, and an ammonium tube bundle extending to the front part of the roller from the rear part; the rear part ofthe tubular reactor extends into the front part of the roller. The production system and the production method disclosed by the invention have the beneficial effects that ammonium-phosphate slurry isregulated to a proper condition by utilizing washing liquor, and then is introduced into a special granulation structure to realize granulation; a product with low water content and high granular strength can be obtained, and has the advantages of reduced caking property, strong caking resistance and good water solubility.

Description

technical field [0001] The invention belongs to the technical field of compound fertilizer production, and in particular relates to a production system and a production method of a water-soluble compound fertilizer, in particular to the production of a sulfur-based water-soluble fertilizer. Background technique [0002] Compound fertilizer is a chemical fertilizer containing two or more nutrient elements (N, P, K, Ca, Mg, S, etc.) Elements) content is single, it can be formulated according to the acidity and alkalinity of the soil, and the different content of nutrients in the soil in different regions. [0003] There are two main methods of preparing compound fertilizers, physical and chemical. Common physical methods include melt tower granulation method, pellet method and slurry method; chemical method is acid method. When the compound fertilizer is produced by the granulation method and the slurry method, it is generally necessary to add 6%-10% water to the raw materia...

Claims

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Application Information

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IPC IPC(8): C05G1/00
CPCC05B7/00C05G5/12C05C3/00C05C9/00C05D1/00
Inventor 宋国明
Owner 武汉环绿时代环保科技有限公司
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