CN102010244A - Method for producing urine-based composite fertilizer containing phosphorus mineral powder - Google Patents
Method for producing urine-based composite fertilizer containing phosphorus mineral powder Download PDFInfo
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- CN102010244A CN102010244A CN2009101951499A CN200910195149A CN102010244A CN 102010244 A CN102010244 A CN 102010244A CN 2009101951499 A CN2009101951499 A CN 2009101951499A CN 200910195149 A CN200910195149 A CN 200910195149A CN 102010244 A CN102010244 A CN 102010244A
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- ground phosphate
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Abstract
The invention relates to a method for producing urine-based composite fertilizer containing phosphorus mineral powder, which comprises the following steps of: spraying 95-99.7 percent by weight of urea solution at the temperature 110-140 DEG C on a basic fertilizer containing phosphorus mineral powder and other nitrogen, phosphorus and potassium in a granulator and carrying out rotary granulation; and screening obtained materials to obtain granular nitrogen-phosphorus-potassium composite fertilizer. The method of the invention simplifies the production process and can reduce energy consumption and pollutant emission and improve fertilizer efficiency and the quality of the fertilizer.
Description
Technical field
The present invention relates to the chemical fertilizer specialty of chemical industry, specifically, relate to a kind of production method of NpK complex fertilizer, or rather, relate to a kind of method of utilizing urine and ground phosphate rock mixing granulation to produce compound manure.
Background technology
The production method majority of existing compound manure is based on granulating method; send into rotary drum granulator after exactly the basic material of nitrogenous, phosphorus, potassium being measured respectively; in tablets press, make the material granulating by adding steam or water; mass transport behind the granulating promptly gets qualified product through the exsiccant material through cooling, screening to the rotary drying kiln inner drying.
When with urea being sources of nitrogen employing granulating method explained hereafter composite fertilizer, because the urea fusing point is low, the compound manure critical relative humidity that contains the urine base is lower, brings inconvenience and difficulty for operations such as granulation, drying.
Chinese patent CN1158831A and CN1221716A disclose two kinds of methods of utilizing urine system composite fertilizer, these two kinds of methods utilize the urine of urea plant and sylvite making low-melting melting charge slurry below 120 ℃, it is sprayed onto makes granular composite fertilizer on other solid fertilizers again.But when making melting charge slurry with sylvite and urea liquid, need earlier sylvite to be heated to certain temperature, input and energy consumption that this had both increased equipment have also caused the complicated of production process.
Chinese patent application number is preparation method and the production technique thereof that a kind of partial acidated ground phosphate rock compound fertilizer has been introduced in 97107557.3 invention.This invention is that urea and strong sulfuric acid response are generated melting charge slurry, produces compound manure with ground phosphate rock, the bonding granulation of potash fertilizer again.Need add sulfuric acid in this method production process, if acid overweight, also need with the ammonia neutralization, fertile method is approaching again for this and propylhomoserin legal system, need the taking environmental conservation into consideration problem, and Production Flow Chart is also long.
Summary of the invention
Produce the defective that compound manure exists at above-mentioned employing granulating method, the present invention aims to provide the energy-saving production method that contains the urea-based compound fertilizer of ground phosphate rock that a kind of Production Flow Chart is obviously simplified, have and cut down the consumption of energy minimizing disposal of pollutants, effects such as prolongation fertilizer usage period.
The ultimate principle of present method is: utilize the urea soln itself that obtains from urea plant to have higher temperature and certain viscosity, it directly has been sprayed onto the ground phosphate rock of metering respectively and other is nitrogenous, the base fertilizer surface of phosphorus, potassium, one than higher prilling temperature under mixing granulation, can directly make the particulate slow-release compound manure.Because ground phosphate rock is inert substance, can with urea, Repone K reaction, so, the solid state reaction that the compound manure of making for the phosphorus source with ground phosphate rock takes place between storage-life seldom, thereby prevented from caking.In addition,, can not absorbed by crop in being manured into soil, but produce fertilizer efficiency gradually, thereby be a kind of slow release fertilizer at once with acidic substance deferred reaction in the soil because ground phosphate rock is not water-soluble phosphorus.
The production method that contains the urea-based compound fertilizer of ground phosphate rock of the present invention; it is urea soln with 110～140 ℃ of concentration 95～99.7 weight %, temperature; spray in the tablets press contain ground phosphate rock and other is nitrogenous, on the base fertilizer of phosphorus, potassium; turn round granulation, the gained material obtains the granular nitrogen phospho potash complex fertilizer through screening.
Described nitrogenous base fertilizer is selected from one or more the mixture in ammonium chloride, ammonium sulfate, ammonium nitrate, the urea; Described phosphorous base fertilizer is selected from one or more the mixture in monoammonium phosphate, diammonium phosphate, normal superphosphate, the double superhosphate; The described potassium base fertilizer that contains is selected from one or more mixture in Repone K, the vitriolate of tartar.
Before the granulation, if base fertilizer is a particulate state, fragmentation makes granularity less than 1mm, to guarantee that compound manure mixes and the granulation quality to the base fertilizer of nitrogenous, phosphorus, potassium in advance in adding tablets press.The fineness of described ground phosphate rock should be between 0.05～0.074mm, and granularity is fine into very much Ben Taigao; Granularity is too thick, is difficult for being absorbed by crop in soil.
According to the present invention, be 100% ureometer with content, the add-on of described urea soln is 10～50 weight % that add the total quantity of goods produced of fertilizer.The add-on of described ground phosphate rock is 10～35 weight % that add the total quantity of goods produced of fertilizer.
The inventive method compared with prior art has following advantage:
1. the present invention adopts is that the urea soln in the urea plant is directly sprayed into the method for producing compound manure on the base fertilizer in the tablets press; saved the expense such as granulation, packing, transportation of urea concentrated solution; the broken process of urea when also having saved the solid urea compound fertilizer making; simplify Production Flow Chart, reduced energy consumption.
2. utilize the heat of urea melting, improve the granulation material temperature, reduced drying load, reduced the discharging of pollutent.
3. add ground phosphate rock and replace the phosphorus ammonium can improve the anti-caking performance of compound manure, keep fertilizer efficiency permanent.The manufacturing of phosphorus ammonium is the engineering of a more complicated, the energy consumption height, and blowdown flow rate is big.Replace the phosphorus ammonium also to play energy-saving and cost-reducing effect indirectly with ground phosphate rock.
Embodiment
Enumerate some embodiment below and come the present invention is further described in detail, but the present invention is in no way limited to these embodiment.All percentage compositions in the embodiment of the invention all are weight percentage.
Embodiment 1
With the method that sprays into; with concentration is 95%; temperature is 115 ℃ urea soln 320g and ground phosphate rock 333g, monoammonium phosphate 100g, the Repone K 250g in the tablets press; the fineness of described ground phosphate rock is 0.05～0.074mm; mixing granulation; material after the granulation obtains the compound manure that granularity is 1～4.75mm through screening.Fertilizer product analytical results: N 15.0%, P
2O
515.0%, K
2O15.0%, total available nutrient (N+P
2O
5+ K
2O)=45.0%, fertilizer moisture is 1.0%, and intensity is 20 newton, balling ratio 85%.
Embodiment 2
With the method that sprays into; with concentration is 99.7%; temperature is 140 ℃ urea soln 420g; with ground phosphate rock 200g, monoammonium phosphate 80g, vitriolate of tartar 200g, the kaolin 100g in the tablets press; the fineness of described ground phosphate rock is 0.05～0.074mm; mixing granulation, the material after the granulation obtains the compound manure that granularity is 1～4.75mm through screening.Fertilizer product analytical results: N 20%, P
2O
510%, K
2O 10%, total available nutrient (N+P
2O
5+ K
2O)=40%, fertilizer moisture is 1.5%, and intensity is 18 newton, balling ratio 90%.
Embodiment 3
With the method that sprays into; with concentration is 95%; temperature is 125 ℃ urea soln 150g; with ground phosphate rock 333g, Repone K 167g, ammonium chloride 150g, the clay 200g in the tablets press; the fineness of described ground phosphate rock is 0.05～0.074mm; mixing granulation, the material after the granulation obtains the compound manure that granularity is 1～4.75mm through screening.Fertilizer product analytical results: N 10%, P
2O
510%, K
2O 10%, total available nutrient (N+P
2O
5+ K
2O)=30%, fertilizer moisture is 1.9%, and intensity is 12 newton, balling ratio 95%.
Embodiment 4
With the method that sprays into; with concentration is 99.7%; temperature is 140 ℃ urea soln 400g; with ground phosphate rock 200g, Repone K 100g, vitriolate of tartar 250g, the wilkinite 50g in the tablets press; the fineness of described ground phosphate rock is 0.05～0.074mm; mixing granulation, the material after the granulation obtains the compound manure that granularity is 1～4.75mm through screening.Fertilizer product analytical results: N 23.5%, P
2O
56%, K
2O 6%, total available nutrient (N+P
2O
5+ K
2O)=35.5%, fertilizer moisture is 1.7%, and intensity is 14 newton, balling ratio 90%.
Embodiment 5
With the method that sprays into; with concentration is 95%; temperature is 120 ℃ urea soln 300g; with ground phosphate rock 100g, monoammonium phosphate 300g, vitriolate of tartar 200g, the stone flour 100g in the tablets press; the fineness of described ground phosphate rock is 0.05～0.074mm; mixing granulation, the material after the granulation obtains the compound manure that granularity is 1～4.75mm through screening.Fertilizer product analytical results: N 16%,, P
2O
518%, K
2O 10%, total available nutrient (N+P
2O
5+ K
2O)=44%, fertilizer moisture is 1.3%, and intensity is 22 newton, balling ratio 85%.
Embodiment 6
With the method that sprays into; with concentration is 96%; temperature is 110 ℃ urea soln 400g; with ground phosphate rock 100g, ammonium chloride 50g, ammonium nitrate 200g, monoammonium phosphate 100g, vitriolate of tartar 100g, the wilkinite 50g in the tablets press; the fineness of described ground phosphate rock is 0.05～0.074mm; mixing granulation, the material after the granulation obtains the compound manure that granularity is 1～4.75mm through screening.Fertilizer product analytical results: N 28%,, P
2O
57%, K
2O 5%, total available nutrient (N+P
2O
5+ K
2O)=40%, fertilizer moisture is 0.9%, and intensity is 15 newton, balling ratio 87%.
Embodiment 7
With the method that sprays into; with concentration is 97%; temperature is 135 ℃ urea soln 200g; with ground phosphate rock 300g, ammonium sulfate 50g, monoammonium phosphate 200g, Repone K 167g, the stone flour 83g in the tablets press; the fineness of described ground phosphate rock is 0.05～0.074mm; mixing granulation, the material after the granulation obtains the compound manure that granularity is 1～4.75mm through screening.Fertilizer product analytical results: N 12%,, P
2O
520%, K
2O 10%, total available nutrient (N+P
2O
5+ K
2O)=42%, fertilizer moisture is 1.3%, and intensity is 20 newton, balling ratio 93%.
Embodiment 8
With the method that sprays into; with concentration is 99%; temperature is 130 ℃ urea soln 100g; with ground phosphate rock 200g, monoammonium phosphate 100g, diammonium phosphate 300g, Repone K 200g, the clay 100g in the tablets press; the fineness of described ground phosphate rock is 0.05～0.074mm; mixing granulation, the material after the granulation obtains the compound manure that granularity is 1～4.75mm through screening.Fertilizer product analytical results: N 11%,, P
2O
525%, K
2O 12%, total available nutrient (N+P
2O
5+ K
2O)=48%, fertilizer moisture is 0.8%, and intensity is 30 newton, balling ratio 94%.
Embodiment 9
With the method that sprays into; with concentration is 95%; temperature is 110 ℃ urea soln 180g; with ground phosphate rock 200g, normal superphosphate 250g, Repone K 120g, the stone flour 250g in the tablets press; the fineness of described ground phosphate rock is 0.05～0.074mm; mixing granulation, the material after the granulation obtains the compound manure that granularity is 1～4.75mm through screening.Fertilizer product analytical results: N 8%,, P
2O
510%, K
2O 7%, total available nutrient (N+P
2O
5+ K
2O)=25%, fertilizer moisture is 2.5%, and intensity is 12 newton, balling ratio 92%.
Embodiment 10
With the method that sprays into; with concentration is 98%; temperature is 130 ℃ urea soln 200g; with ground phosphate rock 250g, ammonium chloride 100g, double superhosphate 100g, vitriolate of tartar 200g, the stone flour 150g in the tablets press; the fineness of described ground phosphate rock is 0.05～0.074mm; mixing granulation, the material after the granulation obtains the compound manure that granularity is 1～4.75mm through screening.Fertilizer product analytical results: N 11.5%,, P
2O
512%, K
2O 10%, total available nutrient (N+P
2O
5+ K
2O)=33.5%, fertilizer moisture is 2%, and intensity is 14 newton, balling ratio 89%.
Claims (5)
1. production method that contains the urea-based compound fertilizer of ground phosphate rock; it is characterized in that; urea soln with 110～140 ℃ of concentration 95～99.7 weight %, temperature; spray in the tablets press contain ground phosphate rock and other is nitrogenous, on the base fertilizer of phosphorus, potassium; turn round granulation, the gained material obtains the granular nitrogen phospho potash complex fertilizer through screening.
2. the production method of urea-based compound fertilizer according to claim 1 is characterized in that, is 100% ureometer with content, and the add-on of described urea soln is 10～50 weight % that add the total quantity of goods produced of fertilizer.
3. the production method of urea-based compound fertilizer according to claim 1 is characterized in that, the add-on of described ground phosphate rock is 10～35 weight % that add the total quantity of goods produced of fertilizer.
4. according to the production method of claim 1 or 3 described urea-based compound fertilizers, it is characterized in that the fineness of described ground phosphate rock is 0.05～0.074mm.
5. the production method of urea-based compound fertilizer according to claim 1, it is characterized in that, described nitrogenous base fertilizer is selected from one or more the mixture in ammonium chloride, ammonium sulfate, ammonium nitrate, the urea, and described phosphorous base fertilizer is selected from one or more the mixture in monoammonium phosphate, diammonium phosphate, normal superphosphate, the double superhosphate; The described potassium base fertilizer that contains is selected from one or more mixture in Repone K, the vitriolate of tartar.
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| CN2009101951499A CN102010244A (en) | 2009-09-04 | 2009-09-04 | Method for producing urine-based composite fertilizer containing phosphorus mineral powder |
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102775222A (en) * | 2012-09-04 | 2012-11-14 | 盘锦施壮肥业有限公司 | Production method of drying-free compound fertilizer |
-
2009
- 2009-09-04 CN CN2009101951499A patent/CN102010244A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102775222A (en) * | 2012-09-04 | 2012-11-14 | 盘锦施壮肥业有限公司 | Production method of drying-free compound fertilizer |
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Application publication date: 20110413 |