Combined ejection prilling tower compound fertilizer prilling method

A technology of granulating tower and compound fertilizer, which is applied in the direction of urea compound fertilizer, nitrogen fertilizer, fertilizer form, etc., can solve the problems of complex structure of process equipment, high cost of facilities, low production capacity and cost-effectiveness, etc. Small and cost-effective

Inactive Publication Date: 2016-11-16
SHENZHEN BATIAN ECOTYPIC ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problems of high-tower granulation are high facility cost, complex process equipment structure, complicated operation, suitable for high production capacity, low cost performance for low production capacity, inflexible production conversion, and easy waste
The purpose of the system disclosed in this patent is that multiple injectors are used to re-granulate the screened small particles, and it does not realize the re-layering of the finished particles.

Method used

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  • Combined ejection prilling tower compound fertilizer prilling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1) Prepare nitrophosphate compound fertilizer, potash fertilizer and phosphate fertilizer into molten slurry according to conventional methods.

[0029] Step 2) Turn on the high-pressure blower to lead the high-pressure air into the ejector 1 .

[0030] Step 3) Prepare medium and trace elements, zeolite powder, bentonite, fertilizer and the like into small granular materials according to conventional methods.

[0031] Step 4) Ejector 1 introduces the molten slurry and small particles in step 1) into the mixing chamber at a weight ratio of 1:1 through the negative pressure generated during the slurry conveying process to form material liquid 1.

[0032] Step 5) The high-pressure gas in the injector 1 passes the feed liquid through the diffusion tube to form a gas-liquid mixture, and simultaneously sprays the gas-liquid mixture into the prilling tower 1 with the injection direction as the horizontal direction, and the volume ratio of gas and feed liquid is 10000:1 T...

Embodiment 2

[0038] Step 1) Prepare nitrophosphate compound fertilizer, potash fertilizer and phosphate fertilizer into molten slurry according to conventional methods.

[0039] Step 2) Turn on the high-pressure blower to lead the high-pressure air into the ejector 1 .

[0040] Step 3) Prepare medium and trace elements, zeolite powder, bentonite, fertilizer and the like into small granular materials according to conventional methods.

[0041] Step 4) Ejector 1 introduces the molten slurry and small particles in step 1) into the mixing chamber at a weight ratio of 1:1 through the negative pressure generated during the slurry conveying process to form material liquid 1.

[0042]Step 5) The high-pressure gas in the injector 1 passes the feed liquid through the diffusion tube to form a gas-liquid mixture, and at the same time sprays the gas-liquid mixture into the prilling tower 1 with the injection direction as the horizontal direction, and the volume ratio of gas and feed liquid is 10000:2 ...

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Abstract

The invention relates to a combined ejection prilling tower compound fertilizer prilling method. The method comprises the following steps that small granules and melting slurry A are mixed to form feed liquid, the feed liquid is mixed with gas to form a gas-liquid mixture, the gas-liquid mixture is ejected into a first prilling tower, formed fertilizer granules enter a screening machine, and first-grade finished product granulated fertilizer and first-grade small granulated fertilizer are obtained; the first-grade finished product granulated fertilizer is mixed with melting slurry B to form feed liquid, the feed liquid is mixed with gas to form a gas-liquid mixture, the gas-liquid mixture is ejected into a second prilling tower, formed fertilizer granules enter the screening machine, and second-grade finished product granulated fertilizer and second-grade small granulated fertilizer are obtained. The angle between the ejection direction and a horizontal plane is 0-90 degrees, and the ejection direction is upward relative to the horizontal plane. According to the multilayer compound fertilizer prepared through the prilling method, uniformity, smoothness and other indexes of the fertilizer granules can meet requirements for composite fertilizer products, the prilling cost is low, and the cost performance of the fertilizer is improved.

Description

technical field [0001] The invention belongs to the field of fertilizer granule production, in particular to a compound fertilizer granulation method with a combined jet granulation tower. Background technique [0002] The existing compound fertilizer production methods mainly include tower granulation, spray granulation, disc granulation and the like. The problems of high-tower granulation are high facility cost, complex process equipment structure, complicated operation, suitable for high production capacity, low cost performance for low production capacity, inflexible production conversion, and easy waste. High tower granulation requires high investment costs. The civil engineering and equipment investment of a tower is about 30 million yuan. It occupies a large area of ​​about 3 mu of land and has a complex structure. However, the appearance of the spray granulation and disc granulation products is not smooth enough, and the nutrient content of the granules is not unifo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G5/00C05C9/00B01J2/02
CPCB01J2/02C05C9/005C05G5/12
Inventor 黄培钊张建军李秀旭穆光远刘法安
Owner SHENZHEN BATIAN ECOTYPIC ENG
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