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Method for producing Nitrogen-Phosphorus-Potassium compound fertilizer by ammonia and acid tubular reactor

A tubular reactor, ternary compound fertilizer technology, applied in the application, fertilizer form, fertilization device and other directions, can solve the problems of rough product appearance, high product cost, low ball forming rate, etc., to save equipment investment and a large amount of energy. The effect of high consumption, strong adaptability of raw materials and high ball forming rate

Inactive Publication Date: 2010-06-02
天津达汇丰生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method overcomes the disadvantages of high energy consumption, rough product appearance, low ball forming rate and high product cost produced by the traditional agglomerate method, reduces the cost to the greatest extent, and improves the product quality to the greatest extent.

Method used

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  • Method for producing Nitrogen-Phosphorus-Potassium compound fertilizer by ammonia and acid tubular reactor
  • Method for producing Nitrogen-Phosphorus-Potassium compound fertilizer by ammonia and acid tubular reactor
  • Method for producing Nitrogen-Phosphorus-Potassium compound fertilizer by ammonia and acid tubular reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1: 15-15-15 conventional products

[0048] Concentration is 50 kilograms of concentrated sulfuric acid (mass percentage, the same below) of 98%, pumps into tubular reactor after metering, and washing water joins tubular reactor after metering and finishes the dilution to concentrated sulfuric acid, after dilution The mass percentage concentration of sulfuric acid is 50%, and 30 kilograms of gaseous ammonia (containing N82.3%) is added into tubular reactor after metering, and ammonia, acid reaction temperature are controlled at 180 ℃. At the same time, 358 kilograms of ammonium chloride (containing N23.5) and powdered monoammonium phosphate (containing N11%, P 2 o 5 45%) 340 kg, potassium chloride (containing K 2 O 60%) 255 kilograms, the ammonium sulfate solution that above-mentioned powdery material and tubular reactor spray mixes in granulator, and the material temperature in drum granulator is controlled at 60 ℃, after 3min granulation, enters drying Machi...

Embodiment 2

[0049] Embodiment 2: 25-10-5 high nitrogen product

[0050] Concentration is 35 kilograms of concentrated sulfuric acid (percentage by weight, hereinafter the same) of 98%, pumps into tubular reactor after metering, 30 kilograms of gaseous ammonia (containing N 82.3%), joins tubular reactor after metering, After the washing water is metered, it is added to the tubular reactor and the dilution of the concentrated sulfuric acid is completed. The mass percentage concentration of the diluted sulfuric acid is 60%, and the reaction temperature of ammonia and acid is controlled at 200°C. At the same time, 400 kilograms of ammonium chloride (containing N23.5), 235 kilograms of crushed urea (containing N46.2), powdered monoammonium phosphate (containing N11%, P 2 o 5 45%) 225 kg, potassium chloride (containing K 2 (060%) 85 kilograms, the ammonium sulfate solution that above-mentioned powdery material and tubular reactor spray mixes in the granulator, and the material temperature in ...

Embodiment 3

[0051] Example 3: 13-23-12 high phosphorus product

[0052] 40 kg of concentrated sulfuric acid (weight percentage, the same below) with a concentration of 98% is pumped into the tubular reactor after metering, and 30 kg of gaseous ammonia (containing N82.3%) is added into the tubular reactor after metering After metering, the washing water is added to the tubular reactor and the dilution of concentrated sulfuric acid is completed. The concentration of sulfuric acid after dilution is 70% by mass, and the reaction temperature of ammonia and acid is controlled at 220°C. At the same time, 185 kilograms of ammonium chloride (containing N22.8), 20 kilograms of urea (containing N46.2), powdered monoammonium phosphate (containing N11%, P 2 o 5 45%) 510 kg, potassium chloride (containing K 2 (055%) 220 kg, the above-mentioned powdery material and the ammonium sulfate solution sprayed from the tubular reactor are mixed in the granulator, and the temperature of the material in the dru...

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Abstract

The invention discloses a method for producing a Nitrogen-Phosphorus-Potassium compound fertilizer by using an ammonia and acid tubular reactor. The method comprises the following steps of: preparing an ammonium sulfate solution at 180-220 DEG C by concentrated sulfuric acid, ammonia and water; controlling the reaction heat of ammonia and acid by the addition amount of the water; spraying in a granulator to granulate with other base fertilizers containing nitrogen, phosphorus and potassium; drying; cooling; screening; and filming to obtain a nitrogen-phosphorus-potassium compound fertilizer. The reaction heat of the ammonia and the acid is fully utilized, the ammonium sulfate solution generated by the reaction is in liquid phase and viscosity, the balling rate is high, the moisture of granulation materials is obviously reduced, the drying load is lowered, the production need can be satisfied by changing two-section drying into one-section drying, and the equipment investment and great energy consumption are saved.

Description

technical field [0001] The invention relates to a compound fertilizer production method, in particular to a method of adding chemical raw materials sulfuric acid and ammonia to granulate in the production process of the aggregate method to produce a ternary compound fertilizer containing nitrogen, phosphorus and potassium. Background technique [0002] At present, with the development of modern agriculture, the development of compound fertilizers at home and abroad plays a leading role in the chemical fertilizer industry. In the developed countries of the chemical fertilizer industry, the amount of compound fertilizers has accounted for 70% to 80% of the amount of chemical fertilizers. Compound fertilizers are mainly basic fertilizers containing nitrogen, phosphorus, and potassium, such as urea, ammonium chloride, ammonium phosphate, and potassium chloride, which are mixed in a granulator at a certain temperature and liquid phase. Relying on its own adhesive force or adding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05G5/00
Inventor 杨金宝杨桂双李云利杨长东
Owner 天津达汇丰生物科技有限公司
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