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Double-ammoniation pelletizing process

A granulation and process technology, applied in the field of double ammonium granulation process, can solve the problems of high production cost of diammonium phosphate compound fertilizer, product quality not up to the requirements, high cost of waste treatment, etc., and achieve low return and effective The effect of high utilization rate and high reaction efficiency

Pending Publication Date: 2018-04-20
盘锦冠桥复合肥科技服务有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, the production cost of diammonium phosphate compound fertilizer is relatively high, the product quality cannot meet the requirements, the waste disposal cost generated in the production process is high, and the production process is relatively complicated. In order to overcome the defects of the prior art, it is necessary to design a Double ammoniated granulation process

Method used

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Embodiment Construction

[0031] The present invention is further described below in conjunction with specific embodiment:

[0032] A double ammoniated granulation process, the process comprises the following steps:

[0033] Step 1, slurry preparation;

[0034] Step 2, tubular reactor reaction;

[0035] Step 3, double ammoniation reaction;

[0036] Described step one comprises the following specific steps:

[0037] Add solid monoammonium phosphate and tail gas cleaning liquid into the container, and feed saturated steam at the same time, control the temperature of the container at 50-80°C, stir fully and then raise the temperature to 60-110°C, and stir at the same time, the stirring speed is 30-160rpm, to obtain ammonium phosphate solution;

[0038] The second step includes the following specific steps:

[0039] The ammonium phosphate solution prepared in step 1 is dropped into the tubular reactor, and simultaneously 98wt% concentrated sulfuric acid and industrial synthetic ammonia are added to th...

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Abstract

The invention discloses a double-ammoniation pelletizing process which is characterized by comprising the following steps: I, preparing slurry; II, performing reactions in a tubular reactor; III, performing a double-ammoniation reaction. The production process disclosed by the invention is high in reaction efficiency, simple to wash and short in process procedure, washing water can be completely recycled, the obtained product is high in strength, granule surfaces are smooth, relatively round and glossy, a high pelletizing rate is achieved, a small amount of materials are turned back, the effective device utilization rate is high, and no clay is needed for pelletizing.

Description

technical field [0001] The invention relates to the field of agricultural chemical fertilizer production technology, in particular to a double ammoniation granulation technology. Background technique [0002] Diammonium phosphate, also known as diammonium hydrogen phosphate (DAP), is a compound fertilizer containing nitrogen and phosphorus. Off-white or dark gray particles, specific gravity 1.619, easily soluble in water, insoluble in ethanol. It has certain hygroscopicity, and it is easy to decompose in humid air, and volatilizes ammonia to become ammonium dihydrogen phosphate. Diammonium phosphate is a high-concentration quick-acting fertilizer, which is suitable for various crops and soils, especially for nitrogen-loving and phosphorus-demanding crops. It can be used as base fertilizer or top dressing, and it should be applied deeply. It has good miscibility with urea, ammonium nitrate, and ammonium chloride. Because it does not contain potassium, it should be applied i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/06
CPCC05B7/00C05C3/00C05G5/12
Inventor 冯玉海
Owner 盘锦冠桥复合肥科技服务有限公司
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