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High-efficiency high-concentration sulphur based complex fertilizer

A sulfur-based compound fertilizer and high-concentration technology, applied in urea compound fertilizer, nitrogen fertilizer, potash fertilizer and other directions, can solve problems such as loss of raw materials, easy gasification and volatilization of urea, etc., and achieve the effect of reducing loss of raw materials

Active Publication Date: 2008-12-10
HUBEI NEWYANGFENG FERTILIZER STOCK
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  • Summary
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AI Technical Summary

Problems solved by technology

At this time, the slurry temperature in the ground tank is as high as 125-130°C, and the temperature of the dryer is as high as 440-500°C. Urea is easy to gasify and volatilize at this high temperature, resulting in loss of raw materials.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0017] A, produce mixed acid: mix with 1 ton of potassium chloride and 1.22 tons of 98% sulfuric acid after making potassium bisulfate (transformation efficiency ≥ 85%), then with 3.4086-3.7674 tons of 20% phosphoric acid (quality) after phosphoric acid quality control It can achieve the production of more than 60% of diammonium phosphate) mixed, that is, to make mixed acid;

[0018] B. Neutralization reaction: After the above-mentioned mixed acid and 0.246 tons of gas ammonia are neutralized in a tubular reactor, the formed material is subjected to a secondary neutralization reaction with 0.325 tons of gas ammonia and then flows into the ground tank, and then 0.03 tons of ammonia are added Potassium sulfate is stirred to form a slurry;

[0019] C, granulation molding: send the above-mentioned slurry into a dryer for drying and granulation molding;

[0020] D. Nitrogen supplementation: Melt 0.32-0.36 tons of urea into a slurry at a temperature of 105-115°C. When the dried and...

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PUM

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Abstract

The invention relates to a high-efficiency high-concentration sulfur-based compound fertilizer, the compositions of which in weight portion are: 1 portion of potassium chloride, 3.40 to 3.76 portions of 20 percent phosphoric acid, 0.32 to 0.36 portion of urea, 0.571 portion of gas ammonia, 1.22 portions of 98 percent sulphuric acid and 0.03 portion of lemery. The production process comprises the following steps that: A. mixed acid is prepared; B. neutralization reaction is carried out; C. granulation is carried out; and D. nitrogen is added. The production process has the advantage that the production process can manufacture the high-efficiency high-concentration sulfur-based compound fertilizer, wherein the ratio of N to P to K is 16 to 16 to 16.

Description

technical field [0001] The invention relates to the field of farmland fertilizer processing. Background technique [0002] At present, the known sulfur-based compound fertilizer is produced by potassium chloride, ammonia gas, urea, sulfuric acid, phosphoric acid as raw materials, and its production process steps are: [0003] A, preparation of mixed acid: mixed with potassium chloride and 98% sulfuric acid to make potassium bisulfate and mixed with phosphoric acid to prepare mixed acid; [0004] B. Neutralization reaction: neutralize the mixed acid and gaseous ammonia in a tubular reactor, the neutralization reaction forms a slurry that flows into the ground tank, and then adds urea into the slurry to melt to form a mixed slurry; [0005] C. Granulation molding: spray the above mixed slurry into a granulation dryer for spraying and granulation molding. [0006] The granular sulfur-based compound fertilizer produced by the above-mentioned known ingredients and production pr...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05D1/02C05B11/08C05C9/00C05C3/00
Inventor 郭圣涛胡春林龚明
Owner HUBEI NEWYANGFENG FERTILIZER STOCK
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