CN1206193C - Process for producing high concentration azophoska compound fertilizer by tower type pelletizing - Google Patents

Process for producing high concentration azophoska compound fertilizer by tower type pelletizing Download PDF

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Publication number
CN1206193C
CN1206193C CN 03143982 CN03143982A CN1206193C CN 1206193 C CN1206193 C CN 1206193C CN 03143982 CN03143982 CN 03143982 CN 03143982 A CN03143982 A CN 03143982A CN 1206193 C CN1206193 C CN 1206193C
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China
Prior art keywords
granulation
technology
powder
mulser
repone
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Expired - Fee Related
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CN 03143982
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Chinese (zh)
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CN1473808A (en
Inventor
周建军
秦磊
古德福
赵景善
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Ningxia Kaiyuan Huafeng Chemical Ltd By Share Ltd
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Individual
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Abstract

The present invention relates to technology for producing high concentration NPK compound fertilizer by tower type granulation, which has the technological processes that powder materials containing phosphorus and potassium, and an auxiliary material are added into a molten urea solution; after the mixture is mixed and stirred into melt slurry, granulation is carried out. The present invention is characterized in that the melt slurry needs emulsifying in an emulsifying machine before granulation. The present invention increases the emulsify technology before granulation, and makes use of the precise combination of three groups of rotors and stators of the emulsifying machine to generate strong shearing force during rotation at high speed. Thus, the purposes of mixing, pulverization and emulsification are realized. In the technology, large granules and dry agglomerated powder which exist in a raw material mixture are uniformly dispersed after the large granules and the dry agglomerated powder are emulsified. Thus, a mixed material becomes emulsifying liquid with height uniformity and with average grain diameter of 0.5 mum. Consequently, the phenomenon that a spray head is clogged because of low stirring efficiency, etc. is eliminated. Continuous industrialization production can be completely achieved.

Description

Tower granulation is produced the technology of high-concentration compound N-P-K fertilizer
Technical field
The invention belongs to the chemical technique field, relate to the technology that a kind of tower granulation is produced high-concentration compound N-P-K fertilizer.
Background technology
The Chinese patent application method of high-concentration compound N-P-K fertilizer " tower granulation produce " (02103008.1) disclose a kind of in the fused solution of urea, add nitrogenous; contain potassium powder and auxiliary material; mix; directly be sent to granulation in the tower type pelletizer after stirring the production molten slurry; it is good that this method has into sphericity; but yield rate is high and the advantage of production plurality of specifications product; but; because 1. having large granular materials and other impurity in the powder unavoidably exists; 2. stirring efficiency is low; ultra-fine grain in the powder (micro mist) mixes with urine is extremely difficult; embrace into dry powder group easily; above-mentioned reason causes shower nozzle very easily blocked, thereby influences serialization production.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, it is blocked to provide a kind of prilling spry to be difficult for, and can reach the technology that industrialization continuous production purpose tower granulation is produced high-concentration compound N-P-K fertilizer fully.
Technical scheme of the present invention is as follows:
A kind of tower granulation is produced the technology of high-concentration compound N-P-K fertilizer, and its technological process is phosphorous for adding in the fused urea soln, contain potassium powder and auxiliary material, mixes, stirs into granulation behind the molten slurry, and keeping slurry temperature is 116-125 ℃; Described phosphorous powder is a monoammonium phosphate, containing the potassium powder is Repone K or vitriolate of tartar, the additional proportion of above-mentioned urea, monoammonium phosphate, Repone K or vitriolate of tartar is counted 2-4 with weight ratio: 1-2: 1, described auxiliary material is lime carbonate or zeolite, lime carbonate joins in the molten slurry that contains Repone K with the 5-10% of total raw material amount, zeolite joins in the molten slurry of sulfur acid potassium with the 10-20% of total raw material amount, it is characterized in that: above-mentioned molten slurry needs to carry out emulsification before granulation in mulser, and the material median size after the emulsification is 0.5 μ m;
Described mulser ingress is equipped with filtering net;
Described mulser is equipped with RHVC.
The present invention increases emulsifying process before granulation, utilize three groups of commentaries on classics of mulser, the precision of stator to realize mixing, pulverizing and emulsification purpose in conjunction with reaching the powerful shearing force that in high speed rotating, produces, existing macrobead and dry powder group homodisperse after emulsification in the raw mix in this technology, make mixture become emulsifying aq highly uniformly, its median size is 0.5 μ m, thereby solved the shower nozzle latch up phenomenon that causes owing to reasons such as stirring efficiency are low, can reach the industrialization continuous production fully; Simultaneously, filtering net is installed in the mulser ingress, is destroyed the normal operation of mulser to prevent impurity such as quick-fried slag, being equipped with RHVC then is to regulate the mulser rotating speed according to the liquid level height and the emulsifying effectiveness of stirred pot.
Embodiment
Embodiment 1:
Get monoammonium phosphate (MAP) 21.0kg that is crushed to about 60 orders, Repone K (KCl) 19.8kg, lime carbonate (CaCO 3) the 9.7kg powder; join in the fusing urea solution of 49.5kg after mixing, the dry intensification; fully stirred 5 minutes; keeping slurry temperature is 118 ℃, melting charge slurry is sent to carries out emulsification in the mulser then, leaks into subsequently in the rotary nozzle on the tower type pelletizer top; granulation and cooling; qualified particle is high density NPK composite fertilizer, and product specification is: 25-10-10, product contained humidity 1.3%, the average anti-crushing power 9.4N of particle, yield rate 99%.
Embodiment 2
Get monoammonium phosphate (MAP) 25.1kg that is crushed to about 60 orders, Repone K (KCl) 23.8kg, lime carbonate (CaCO 3) the 4.7kg powder; join in the fusing urea solution of 46.4kg after mixing, the dry intensification, fully stirred 8 minutes, keeping slurry temperature is 118 ℃; then melting charge slurry is sent to and carries out emulsification in the mulser; subsequently melting charge slurry is leaked in the rotary nozzle on the tower type pelletizer top, granulation and cooling, qualified particle is high density NPK composite fertilizer; product specification is: 24-12-12; after testing, every index is all qualified, and yield rate reaches more than 98%.
Embodiment 3
Get monoammonium phosphate (MAP) 25.1kg that is crushed to about 60 orders, Repone K (KCl) 11.9kg, lime carbonate (CaCO 3) the 16.6kg powder; join in the fusing urea solution of 46.4kg after mixing, the dry intensification, fully stirred 6 minutes, keeping slurry temperature is 116 ℃; then melting charge slurry is sent to and carries out emulsification in the mulser; subsequently melting charge slurry is leaked in the rotary nozzle on the tower type pelletizer top, granulation and cooling, qualified particle is high density NPK composite fertilizer; product specification is: 24-12-6; after testing, every index is all qualified, and yield rate reaches more than 98%.
Embodiment 4
Get monoammonium phosphate (MAP) 25.1kg that is crushed to about 60 orders; Repone K (KCl) 12.2kg; zeolite powder 16.3kg powder; join in the fusing urea solution of 46.4kg after mixing, the dry intensification; fully stirred 6 minutes; keeping slurry temperature is 125 ℃; then melting charge slurry is sent to and carries out emulsification in the mulser; subsequently melting charge slurry is leaked in the rotary nozzle on the tower type pelletizer top, granulation and cooling, qualified particle is high density NPK composite fertilizer; product specification is: 24-12-6; after testing, every index is all qualified, and yield rate reaches more than 98%.

Claims (3)

1. a tower granulation is produced the technology of high-concentration compound N-P-K fertilizer, and its technological process is phosphorous for adding in the fused urea soln, contain potassium powder and auxiliary material, mixes, stirs into granulation behind the molten slurry, and keeping slurry temperature is 116-125 ℃; Described phosphorous powder is a monoammonium phosphate, containing the potassium powder is Repone K or vitriolate of tartar, the additional proportion of above-mentioned urea, monoammonium phosphate, Repone K or vitriolate of tartar is counted 2-4 with weight ratio: 1-2: 1, described auxiliary material is lime carbonate or zeolite, lime carbonate joins in the molten slurry that contains Repone K with the 5-10% of total raw material amount, zeolite joins in the molten slurry of sulfur acid potassium with the 10-20% of total raw material amount, it is characterized in that: above-mentioned molten slurry needs to carry out emulsification before granulation in mulser, and the material median size after the emulsification is 0.5 μ m.
2. according to the technology of the described tower granulation production of claim 1 high-concentration compound N-P-K fertilizer, it is characterized in that: described mulser ingress is equipped with filtering net.
3. according to the technology of claim 1 or 2 described tower granulations production high-concentration compound N-P-K fertilizers, it is characterized in that: described mulser is equipped with RHVC.
CN 03143982 2003-08-07 2003-08-07 Process for producing high concentration azophoska compound fertilizer by tower type pelletizing Expired - Fee Related CN1206193C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 03143982 CN1206193C (en) 2003-08-07 2003-08-07 Process for producing high concentration azophoska compound fertilizer by tower type pelletizing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 03143982 CN1206193C (en) 2003-08-07 2003-08-07 Process for producing high concentration azophoska compound fertilizer by tower type pelletizing

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CN1473808A CN1473808A (en) 2004-02-11
CN1206193C true CN1206193C (en) 2005-06-15

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013035106A1 (en) * 2011-09-07 2013-03-14 Indo Gulf Fertilizers A process for manufacturing a composite fertilizer
CN102659461B (en) * 2012-04-20 2013-07-17 陕西景盛肥业集团有限公司 High-porosity compound fertilizer high tower granulating method and high-porosity compound fertilizer
CN102701846A (en) * 2012-05-28 2012-10-03 徐州市芭田生态有限公司 Method for controlling content of biuret in compound fertilizers for melt granulation in prilling tower
CN102863281B (en) * 2012-08-27 2014-10-22 徐州市芭田生态有限公司 Method for producing high-tower nitro-sulfenyl compound fertilizer and production system applying method
CN104671948A (en) * 2013-12-02 2015-06-03 湖北新洋丰肥业股份有限公司 Novel prilling-tower process compound fertilizer
CN104973905A (en) * 2014-04-11 2015-10-14 福建佳玛驰生态科技有限公司 Fertilizer specially-used for vegetables in greenhouses and preparation method thereof
CN104973906A (en) * 2014-04-11 2015-10-14 福建佳玛驰生态科技有限公司 Fertilizer specially used for honey pomelo tree and preparation method thereof
CN108586042A (en) * 2018-05-22 2018-09-28 亳州司尔特生态肥业有限公司 A kind of method for preparing fertilizer free of drying
CN112811949A (en) * 2021-03-22 2021-05-18 盘锦冠桥复合肥科技服务有限公司 Method for preparing compound fertilizer by spraying ammonium phosphate solution

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