CN101274870B - Preparation for granular composite fertilizer - Google Patents
Preparation for granular composite fertilizer Download PDFInfo
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- CN101274870B CN101274870B CN2007100388483A CN200710038848A CN101274870B CN 101274870 B CN101274870 B CN 101274870B CN 2007100388483 A CN2007100388483 A CN 2007100388483A CN 200710038848 A CN200710038848 A CN 200710038848A CN 101274870 B CN101274870 B CN 101274870B
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Abstract
The invention relates to a preparation method for a granular compound fertilizer. The method of the invention comprises the steps: 50 to 300 weight portions of solid urea containing nitrogen are melted, or urine during urea production process is introduced to be melted with 5 to 60 weight portions of ammonium chloride and then the obtained material is mixed with 0.1 to 1.5 weight portions of polyvinyl alcohol to be melted under temperature of 80 to 105 DEG C; 0 to 10 weight portions of deionized water are added to get mixed slurry and the mixed slurry is added into a mixture which takes 80 to 300 weight portions of nitrogen, 80 to 300 weight portions of phosphorus and 120 to 200 weight portions of potassium as basic raw materials and contains 100 to 300 weight portions of filler; after granulation by a rotary drum granulator, the granular compound fertilizer is obtained. Compared with the prior art, the preparation method can improve appearance of fertilizer and nutrient utilization and has the advantages of reducing cost, saving energy and protecting the environment, etc.
Description
Technical field
The present invention relates to a kind of production method of granular compound fertilizer material, particularly a kind of preparation method of granular compound fertilizer material of drying-free step.
Background technology
The production method of existing compound manure mainly contains slurry process, high tower spraying process, granulating method.Granulating method is because less investment, easy to operate, occupy absolute majority in China, his production method is that water or steam are agglomerated into particle with nitrogen, phosphorus, three kinds of nutritive elements of potassium, the reheat oven dry produces a large amount of tail gas in the drying course, carry dust in the tail gas secretly, promptly produce loss, also polluted environment.
Chinese patent CN1307550A discloses a kind of preparation method of compound fertilizer granule; this method is that 10～40% solid fertilizer is melted in melting tank; then molten materials is introduced granulation in the tablets press, whole granulation process no longer adds entry or steam, does not use drying means.But this method temperature of fusion is too high, and preheating temperature is also high, is not a kind of most economical production method.
The production method of a kind of molten urea solution coproduction composite fertilizer is disclosed among the Chinese patent CN1048707A, this method mainly is to utilize urea and Repone K to form the eutectoid point slip, be sprayed on then on the powders such as organic phosphatic fertiliser, make the NpK complex fertilizer that contains organic phosphatic fertiliser, but this method also is only applicable to organic phosphatic fertiliser, also exist granule strength not high, the defective that balling ratio is low.
In the granulating method compound manure production process, all need to replenish in addition steam or water now,, help the fertilizer granulating to increase amount of liquid phase.Owing to introduced water, thus need drying, thereby need to buy expensive and drying and dust removal installation power consumption must be handled a large amount of tail gas that contain the NPK fertilizers dust that produce because of drying.
Summary of the invention
Purpose of the present invention be exactly in order to overcome the weak point that above-mentioned prior art exists a kind of fertilizer outward appearance that makes that provides improve, agglomeration preventing performance improves, and increases slow-releasing, makes the preparation method of the granular compound fertilizer material that the plant recovery of nutrient of fertilizer improves.
Purpose of the present invention can be achieved through the following technical solutions: a kind of preparation method of granular compound fertilizer material; it is characterized in that; this method is with the nitrogenous solid urea fusing of 50～300 weight parts or introduce urine in the urea production process with the ammonium chloride fusion of 5～60 weight parts; the polyvinyl alcohol that adds 0.1～1.5 weight part then; at 80 ℃～105 ℃ following consolutes; the deionized water that adds 0～10 weight part; the mixed slurry that makes joins the nitrogen of 80～300 weight parts; the phosphorus of 80～300 weight parts; on the mixture of the potassium basic material of 120～200 weight parts and the stopping composition of 100～300 weight parts; through the rotary drum granulator granulation, promptly get the granular compound fertilizer material.
Described nitrogen, phosphorus, potassium basic material be in sulphur ammonium, ammonium chloride, monoammonium phosphate, diammonium phosphate, coarse whiting, Repone K, the vitriolate of tartar one or more.
The concentration of described urine is 80～99.7 weight %, is that temperature is that 110 ℃～140 ℃ urea soln or solid urea is heated to 100 ℃～120 ℃ formed slips in the urea production process.
Described stopping composition comprises rhombspar, lime carbonate, clay, wilkinite.
Do not need make up water during method granulation of the present invention, thereby need not after drying, need not to remove accordingly dust recovery system yet.Product quality indicator is better than national standard.
The present invention compared with prior art has following advantage:
1, the present invention adopts urine and ammonium chloride and polyvinyl alcohol to form low-melting viscous solution and helps other basic material granulation, no longer introduce water in the production process, the balling ratio height, because prilling temperature is suitable, drying-free and cooling, got rid of all very high dry dust-removal system of investment and process cost, operating environment is improved greatly and has been saved investment and production cost.
2, the present invention adopts urine and ammonium chloride mixed melting, makes temperature of fusion reduce, thereby has avoided the generation of biuret in the urine, makes composite fertilizer's quality improve, and adds a little polyvinyl alcohol in the slip, makes viscosity strengthen, thereby balling ratio is improved.The adding of polyvinyl alcohol has increased fertilizer slow release, and the plant recovery of nutrient of fertilizer is improved.
3, method of the present invention has overcome the susceptible to plugging defective of the too high prilling spry of prilling tower in the melt tower granulation technology.
Embodiment
Principle of work of the present invention is: compound manure " granulation " is meant powdery or crystalloid raw material, is agglomerated into a certain size particle by interstitial amount of liquid phase interaction.And amount of liquid phase be meant in water and the water molten salt sum, owing to the rising along with temperature of the solubleness of most inorganic salt raises, therefore, identical amount of liquid phase, promptly can be by more water, lower temperature provides, and can be provided by lower moisture, higher temperature again.Therefore, granulation process good, bad both depended on and the physicochemical property (composition, crystal form, solubleness, viscosity, surface tension etc.) of material system depended on granulated external conditions (moisture, temperature, binding agent) again.The present invention utilizes urea and ammonium chloride can form the double salt slip that fusing point is lower than 100 ℃, owing to introduce ammonium chloride, makes liquid phase increase, and adds a little polyvinyl alcohol again, thereby makes the viscosity of slip strengthen, and helps granulation like this; And because fusing point reduces (fusing point of solid urea is 132 ℃); Make that biuret is difficult for generating, thereby improved the quality of fertilizer.
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
Get urea plant flash evaporator outlet urea soln or melt 300kg, concentration is greater than 99%, and temperature is 135 ℃, with 60kg solid ammonium chloride consolute, add the 1.5kg polyvinyl alcohol again, make the nutrition binding agent, 105 ℃ of temperature of charge, be sprayed onto and contain sulphur ammonium 100kg, monoammonium phosphate 200kg, vitriolate of tartar 200kg and stopping composition kaolin 190kg get the granulating that bonds on the material, and the material behind the granulating is the high-concentration granular NpK complex fertilizer, this product contains N20 weight %, P
2O
510 weight %, K
2O10 weight %, moisture content 0.5 weight %, the granule strength of product is greater than 25 newton/grains.
Embodiment 2:
Getting solid ammonium chloride 10kg adds polyvinyl alcohol 500g again with solid urea 70kg and adds water 2kg be heated to 90 ℃ of thawings in fusion tank; slip after the fusing is sprayed onto the monoammonium phosphate 200kg of rotary drum granulator; vitriolate of tartar 200kg; on the material of ammonium chloride 200kg and rhombspar 300kg; the bonding granulating; the granular nitrogen phospho potash complex fertilizer of concentration during thing behind the granulating promptly gets, this product contains N10 weight %, P
2O
510 weight %, K
2O10 weight %, moisture content 2.0 weight %, the granule strength of product is greater than 15 newton/grains.
Embodiment 3:
Get urea plant flash evaporator outlet urea melt 200kg; concentration is greater than 99.7%; with 20kg solid ammonium chloride consolute; add the 1kg polyvinyl alcohol again, consolute temperature is 100 ℃, and the slip after the fusion sprays into the material diammonium phosphate 300kg in tablets press and the tablets press; vitriolate of tartar 250kg; ammonium chloride 80kg and stopping composition clay 130kg bonding granulating, this product contains N15% weight %, P
2O
515 weight %, K
2O15 weight %, moisture content 1.0 weight %, the granule strength of product is greater than 20 newton/grains.
Embodiment 4:
Get solid urea 50kg; adding 5kg ammonium chloride and 100g polyvinyl alcohol is heated to about 80 ℃ and adds the solution that water 10kg is made into 80% concentration; be sprayed onto in the tablets press and basic material coarse whiting 100kg; diammonium phosphate 80kg; ammonium chloride 300kg; Repone K 120kg and bentonite 100kg bonding granulating, the material behind the granulating contains N12 weight %, P
2O
58 weight %, K
2O7 weight %, the product of moisture content 2.5 weight %, the granule strength of product does not lump greater than 10 newton/grains.
Claims (4)
1. the preparation method of a granular compound fertilizer material; it is characterized in that; this method is with the nitrogenous solid urea fusing of 50～300 weight parts or introduce urine in the urea production process with the ammonium chloride fusion of 5～60 weight parts; the polyvinyl alcohol that adds 0.1～1.5 weight part then; at 80 ℃～105 ℃ following consolutes; the deionized water that adds 0～10 weight part; the mixed slurry that makes joins the nitrogen of 80～300 weight parts; the phosphorus of 80～300 weight parts; on the mixture of the potassium basic material of 120～200 weight parts and the stopping composition of 100～300 weight parts; through the rotary drum granulator granulation, promptly get the granular compound fertilizer material.
2. the preparation method of a kind of granular compound fertilizer material according to claim 1 is characterized in that, described nitrogen, phosphorus, potassium basic material are several in sulphur ammonium, ammonium chloride, monoammonium phosphate, diammonium phosphate, coarse whiting, Repone K, the vitriolate of tartar.
3. the preparation method of a kind of granular compound fertilizer material according to claim 1, it is characterized in that, the mass percent concentration of described urine is 80～99.7%, is that temperature is that 110 ℃～140 ℃ urea soln or solid urea is heated to 100 ℃～120 ℃ formed slips in the urea production process.
4. the preparation method of a kind of granular compound fertilizer material according to claim 1 is characterized in that, described stopping composition comprises rhombspar, lime carbonate, clay, wilkinite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100388483A CN101274870B (en) | 2007-03-30 | 2007-03-30 | Preparation for granular composite fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100388483A CN101274870B (en) | 2007-03-30 | 2007-03-30 | Preparation for granular composite fertilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101274870A CN101274870A (en) | 2008-10-01 |
| CN101274870B true CN101274870B (en) | 2010-09-01 |
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ID=39994775
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100388483A Active CN101274870B (en) | 2007-03-30 | 2007-03-30 | Preparation for granular composite fertilizer |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102336613B (en) * | 2010-07-26 | 2014-03-12 | 蒋俊明 | Ecological fertilizer special for bamboos |
| CN102503696A (en) * | 2011-11-10 | 2012-06-20 | 上海化工研究院 | Preparation method for particle compound fertilizer |
| CN102690144B (en) * | 2012-03-28 | 2014-03-05 | 河南力浮科技有限公司 | Method for producing granular potassium sulfate |
| CN102976829A (en) * | 2012-11-07 | 2013-03-20 | 无锡保利化肥有限公司 | Efficient compound fertilizer |
| CN103449878B (en) * | 2013-08-06 | 2014-12-10 | 深圳市芭田生态工程股份有限公司 | Method for lowering biuret content in high-tower granulated compound fertilizer and production facility thereof |
| CN106268483A (en) * | 2016-08-29 | 2017-01-04 | 河南心连心化肥有限公司 | The preparation facilities of a kind of compound fertilizer mixed slurry and preparation method |
| CN107986874A (en) * | 2017-12-20 | 2018-05-04 | 亳州司尔特生态肥业有限公司 | A kind of method of watery fusion technique productions high tower fertilizer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048707C (en) * | 1997-03-07 | 2000-01-26 | 王长山 | Production process of composite urine fertilizer |
| CN1307550A (en) * | 1998-06-29 | 2001-08-08 | 凯米拉农业公司 | Process for preparation of compound fertilizer granules |
-
2007
- 2007-03-30 CN CN2007100388483A patent/CN101274870B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048707C (en) * | 1997-03-07 | 2000-01-26 | 王长山 | Production process of composite urine fertilizer |
| CN1307550A (en) * | 1998-06-29 | 2001-08-08 | 凯米拉农业公司 | Process for preparation of compound fertilizer granules |
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|---|---|
| CN101274870A (en) | 2008-10-01 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20081001 Assignee: Hubei Sandeli Fertilizer Co., Ltd. Assignor: Shanghai Research Institute of Chemical Industry Contract record no.: 2012310000229 Denomination of invention: Preparation for granular composite fertilizer Granted publication date: 20100901 License type: Exclusive License Record date: 20121225 |
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Address after: 200062 Shanghai city Putuo District Yunling Road No. 345 Patentee after: Shanghai Chemical Research Institute Co., Ltd. Address before: 200062 Shanghai city Putuo District Yunling Road No. 345 Patentee before: Shanghai Research Institute of Chemical Industry |
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