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Method and apparatus for producing calcium ammonium nitrate using by-product calcium nitrate of nitrate phosphatic fertilizer

A technology of calcium ammonium nitrate and phosphate nitrate fertilizer, which is applied in the direction of fertilization equipment, ammonium nitrate fertilizer, nitrogen fertilizer, etc. It can solve the problems that calcium ammonium nitrate cannot be directly used in granulation production, and the physical and chemical properties of calcium ammonium nitrate are greatly different from urea, so as to achieve product performance. Excellent, not easy to agglomerate, large production capacity

Active Publication Date: 2005-12-21
TIANJI COAL CHEM IND GROUP
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Problems solved by technology

However, this technology has only been applied in urea production at present, and has not been promoted and implemented in other fields.
Because the physical and chemical properties of calcium ammonium nitrate are quite different from those of urea, this granulation technology cannot be directly applied to the granulation production of calcium ammonium nitrate

Method used

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  • Method and apparatus for producing calcium ammonium nitrate using by-product calcium nitrate of nitrate phosphatic fertilizer

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Embodiment Construction

[0047] The specific process of producing calcium ammonium nitrate by utilizing nitrophosphate fertilizer by-product calcium nitrate is as follows: figure 1 Shown, come from the thick calcium nitrate storage tank of nitrophosphate fertilizer plant, the thick calcium nitrate solution that temperature is 80 ℃ is squeezed in the filter press 1 through the filter press feeding pump with the pressure of 0.2Mpa, the present invention is equipped with two The filter press operates intermittently once it is turned on and then backed up to ensure continuous filter press. Through the filtration of the filter press 1, about 1% acid-insoluble matter in the thick calcium nitrate solution is filtered out, and the dense phase after the press filtration is returned to the thick calcium nitrate storage tank, and the filtrate flows into the filtrate tank 2 by itself.

[0048] If analyze when the acid concentration in the thick calcium nitrate solution in the thick calcium nitrate storage tank su...

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Abstract

The invention relates to the technics method of producing ammonium nitrate calcium using nitric acid phosphate fertilizer by-produced rough calcium nitrate solution. It makes rough calcium nitrate filtrate and gas ammonia react in tubular reactor to produce ammonium nitrate calcium, adjust pH to 5, vaporize and inflating flash vaporize, gas-liquid separate under negative pressure, the produced material slurry get into rotor drum fluid bed grain producing machine to spread and produce grains, then obtain ammonium nitrate calcium grains. The invention applies rotor drum fluid bed grain producing and cooling technology to spread and produce grain, and uses fluid bed to improve cooling efficiency. The sizes of ammonium nitrate calcium grains can be adjusted, and they have good sphericity and big compressive strength. It's uneasy to agglomerate, and the performance of products is excellent.

Description

Technical field [0001] The invention relates to a production method of calcium ammonium nitrate, in particular to a process for producing calcium ammonium nitrate by using crude calcium nitrate liquid produced by nitrophosphate fertilizer. The invention also relates to a device for carrying out the method. Background technique [0002] Calcium ammonium nitrate, also known as ammoniated calcium nitrate, has the molecular formula 5Ca(NO 3 ) 2 ·NH 4 NO 3 10H 2 O, molecular weight 1080, nitrogen content 15.5%, of which more than 90% is nitrate nitrogen, the rest is ammonium nitrogen, containing 25% water-soluble calcium oxide. Calcium ammonium nitrate is mainly used as chemical fertilizer. Because it mainly contains nitrate nitrogen and water-soluble calcium oxide, it has the advantages of quick effect, high utilization rate, easy absorption by crops, and suitable for calcium-loving crops. It is especially suitable for spraying as foliar fertilizer on Fruits, vegetables, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05C1/00
Inventor 荆宏健郭建民程干华王维旺张凌云
Owner TIANJI COAL CHEM IND GROUP
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