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A kind of production method of sulfur-based nitrate nitrogen fertilizer

A production method, nitrate technology, applied in the field of sulfur-based nitrate nitrogen fertilizer production, can solve the problems of inability to produce products with high sulfur content, and achieve the effect of low cost, uniform nutrient content, and direct application

Active Publication Date: 2017-12-19
河北冀衡赛瑞化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide the production method of sulfur-based nitrate nitrogen fertilizer, to solve the problem that existing method cannot produce the product of high sulfur content

Method used

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  • A kind of production method of sulfur-based nitrate nitrogen fertilizer
  • A kind of production method of sulfur-based nitrate nitrogen fertilizer
  • A kind of production method of sulfur-based nitrate nitrogen fertilizer

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Embodiment 1

[0025] figure 1 The implementation process flow chart of the present invention is provided, specifically as follows:

[0026] 1. Raw material preparation: 9t of ammonium nitrate, 11t of ammonium sulfate (divided into two parts of 6.6t and 4.4t), spare;

[0027] 2. Dissolve ammonium nitrate (9t) with water (0.8~1.0t) to make a dilute ammonium nitrate solution, pour it into the middle tank on the prilling tower, and pass ammonia gas into the middle tank to adjust the pH value of the dilute ammonium nitrate solution is 7.0, and then pumped into the second-stage evaporator on the prilling tower through an intermediate pump, and treated by the second-stage evaporator to obtain an ammonium nitrate solution with a moisture content of ≤0.5%;

[0028] 3. Send the ammonium nitrate solution with a moisture content of ≤0.5% in step 2 into the melting tank, control the melting temperature at 170-172°C, and put it into the first-level mixing tank, then put 6.6 tons of ammonium sulfate into...

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Abstract

The invention discloses a production method for a sulfur-based nitrate nitrogen fertilizer. The production method comprises the following steps of: weighing ammonium nitrate and ammonium sulfate solid in proportion according to a sulphur content demand; feeding an ammonium sulfate solution with the water content being less than or equal to 0.5% into a smelting tank so to be smelted, then feeding the solution into a primary mixing tank and then putting ammonium sulfate which accounts for 1 / 2-2 / 3 of the total weight of ammonium sulfate into the primary mixing tank and treating ammonium sulfate in the condition that the temperature is 165-168 DEG C and the speed is 270-300 r / m to obtain a mixed solution; feeding the mixed solution into a secondary mixing tank, then putting the residual ammonium sulfate solid, and maintaining the treatment condition that the temperature is 160-165 DEG C and the speed is 220-250 r / m to obtain mixed slurry; and emulsifying and granulating the mixed slurry to obtain a fully water soluble high-sulfur sulfur-based nitrate nitrogen fertilizer finished product. By specially selecting the conditions such as the feeding proportion, the stirring temperature, the stirring rotating speed and the like, the fully water soluble high-sulfur sulfur-based nitrate nitrogen fertilizer finished product is produced. The production method is simple in process condition, short in flow, accurate in metering, less in material loss and good in operating environment, can be used for realizing full DCS control operation, and is high in degree of automation.

Description

technical field [0001] The invention relates to chemical fertilizer production technology, in particular to a production method of sulfur-based nitrate nitrogen fertilizer. Background technique [0002] Green onions, garlic, wheat and other crops are in great need of high-nitrogen and high-sulfur fertilizers. At present, the domestic method to deal with this situation is to use several kinds of fertilizers in combination, such as applying potassium sulfate or ammonium sulfate to supplement sulfur, and using urea to supplement Nitrogen; or use fertilizers containing ammonium nitrate to supplement nitrogen (ammonium nitrate has been banned from being used as a fertilizer alone in my country because of its explosiveness), and use ammonium sulfate to supplement sulfur. Since the existing methods of supplementing sulfur and nitrogen in China are mixed use of several kinds of fertilizers, and because the fertilizers contain nutrients (such as potassium elements) that crops do not n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05C13/00
CPCC05C1/00C05C3/00
Inventor 李庆青李广乾
Owner 河北冀衡赛瑞化工有限公司
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