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
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[0017] A. Preparation of mixed acid: After mixing 1 ton of potassium chloride and 98% sulfuric acid with 1.22 tons to make potassium hydrogen sulfate (conversion rate ≥85%), and then adding 3.4086-3.7674 tons of 20% phosphoric acid after phosphoric acid quality control (quality It can achieve the production of more than 60% diammonium phosphate) mixing, that is, the mixed acid is prepared;
[0018] B. Neutralization reaction: After the above-mentioned mixed acid and 0.246 tons of gaseous ammonia are neutralized in a tubular reactor, the resulting material is neutralized again with 0.325 tons of gaseous ammonia and flows into the underground tank, and then 0.03 tons are added. Potassium sulfate is stirred to form a slurry;
[0019] C. Granulation and molding: the above-mentioned slurry is sent to a dryer for drying, granulation and 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 granulated pa...
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