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Industrial production method and apparatus of sulfur coated controlled release fertilizer

A production method and technology for controlled-release fertilizers, which are applied in fertilization devices, agriculture, fertilizer mixtures, etc., can solve the problem of increasing the intermediate transmission process of sulfur-packaged and controlled-release fertilizers, the rupture of sulfur films of sulfur-packaged and controlled-release fertilizers, and the inapplicability of large-scale production, etc. problems, to achieve the effect of improving the effective production time, being conducive to environmental protection, and reducing the intermediate transmission process.

Active Publication Date: 2009-10-07
KINGENTA ECOLOGICAL ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The turntable method has a simple process and is easy to operate, but it is used to produce sulfur-coated controlled-release fertilizers, which has the disadvantages of discontinuous production, difficult temperature control, and low yield, and is not suitable for large-scale production; the spouted bed method is more suitable for controlled-release fertilizers coated with resin. In the production of release fertilizer, if it is used for sulfur coating, the sulfur film is easy to break during the cyclic motion of the spouted bed, resulting in poor product quality; the relatively mature TVA three-drum method is more suitable for the production of sulfur coating controlled release fertilizer, but there are There are many equipments and the process is more complicated, which increases the intermediate transmission process of sulfur-coated controlled-release fertilizer, which may easily lead to the rupture of the sulfur film of sulfur-coated controlled-release fertilizer, thereby reducing the controlled-release effect

Method used

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  • Industrial production method and apparatus of sulfur coated controlled release fertilizer
  • Industrial production method and apparatus of sulfur coated controlled release fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The industrialized production device of sulfur-containing controlled-release fertilizer, the structure of which is as follows figure 1 , 2 As shown, it includes bucket elevator 1, screening machine 2, raw material belt conveyor 3, raw material silo 4, quantitative feeding scale 5, drum 6, dust collector 8, induced draft fan 9, preheater 10, liquid sulfur storage tank 12. Liquid sulfur underground tank 13, liquid sulfur pump 14, sealing agent dissolving tank 15, sealing agent storage tank 16, sealing agent metering pump 17, finished product belt conveyor 7 and finished product silo 11, the bucket elevator 1 passed through the screening machine 2, the raw material belt conveyor 3, the raw material silo 4 and the quantitative feeding scale 5 are connected with the granular fertilizer inlet of the drum 6, and the tail gas outlet of the drum 6 is connected with the dust collector 8, the induced draft fan 9, the preheater 10 and the The preheated air inlet of the drum 6 is c...

Embodiment 2

[0029] Utilize the device described in embodiment 1 to carry out the industrialized production of bag sulfur controlled release fertilizer, and step is as follows:

[0030] (1) After the granular fertilizer is lifted by the bucket elevator 1 to the screening machine 2 for screening, it is sent to the raw material bin 4 through the raw material belt conveyor 3, and then is metered into the drum 6 by the quantitative feeding scale 5;

[0031] (2) The liquid sulfur in the liquid sulfur storage tank 12 enters the liquid sulfur underground tank 13, is pressurized to 0.6-6.0 MPa by the liquid sulfur pump 14, and enters the rotating drum 6 through liquid sulfur flow meter metering;

[0032] (3) Put the sealing agent into the sealing agent dissolving tank 15, heat and dissolve it, put it into the sealing agent storage tank 16, and then meter it into the drum 6 through the sealing agent metering pump 17;

[0033] (4) In the drum 6, the granular fertilizer is preheated to 70-80°C in the...

experiment example 2

[0042] Experimental example 2: Production of 13-13-13-18S sulfur-coated compound fertilizer

[0043] (1) The 17-17-17 compound fertilizer granules are screened and meet the requirements of 2.5-4.2mm particles into the feed bin, and then fed into the drum 6 at a rate of 10 tons / hour through quantitative feeding.

[0044] (2) The liquid sulfur in the liquid sulfur storage tank 12 enters the liquid sulfur underground tank 13, is pressurized to 1 MPa by the liquid sulfur pump 14, and enters the drum 6 at 2.4 tons / hour through the liquid sulfur flow meter.

[0045] (3) Add the sealing agent containing 30% polyethylene and 70% heavy oil into the sealing agent dissolving tank 15 and heat it at 60-70° C. to dissolve, then meter the sealing agent metering pump 17 into the drum 6 at 280 kg / hour.

[0046] (4) In the drum 6, the compound fertilizer is preheated to 70-80°C in the preheating zone of the machine head, and then atomized and sprayed liquid sulfur at 145-155°C and a pressure of 0...

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Abstract

The invention discloses a method for industrialized production of sulfur-coated controlled-release fertilizer and a device thereof. The method comprises the following steps: after being elevated to a sieving machine to be sieved through a bucket elevator and conveyed into a raw material bin through a raw material belt conveyor, granular fertilizer is metered through a dosing scale and enters a rotary drum; liquid sulfur in a liquid sulfur storage tank enters an underground liquid sulfur tank, and enters the rotary drum after being pressurized through a liquid sulfur pump and metered through a liquid sulfur flow meter; sealant is added into a sealant dissolving tank to be heated and dissolved, is discharged into a sealant storage tank, and then enters the rotary drum after being metered through a sealant metering pump; in the rotary drum, the granular fertilizer is preheated in a preheating area, then the coating is gradually formed on the surface of the liquid sulfur atomized fertilizer granules in a sulfur coating area, and finally the sealant is coated in a sealant coating area; the sulfur-coated controlled-release fertilizer going out of the rotary drum is conveyed into an end product bin via an end product belt conveyor, and then packaged and warehoused. The invention has the advantages that the investment on technological equipment is low, continuous operation is realized in the whole technological production process, the operation is simpler and more convenient, and the sulfur can be coated more uniformly.

Description

technical field [0001] The invention belongs to the technical field of controlled-release fertilizer production, and in particular relates to an industrial production method and device for coating sulfur on the surface of urea or compound fertilizer particles. Background technique [0002] Coating a layer of sulfur film on the surface of urea or compound fertilizer granules, and then coating with a sealant, can slow down the release rate of fertilizers. At the same time, the release cycle of fertilizers can be controlled by varying the thickness of the sulfur coating. The release period can generally be precisely controlled. In 1-4 months. If the sulfur-coated controlled-release fertilizer is coated with a layer of resin, the controlled-release period can reach 12 months (referring to Chinese patent CN 1569774, application number 200410024050.x). The effective utilization rate of sulfur-coated controlled-release fertilizers can be more than double that of ordinary chemical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00
Inventor 万连步杨艳李华波
Owner KINGENTA ECOLOGICAL ENG GRP
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