CN102503635A - Production process for potassium nitrogen compound fertilizer - Google Patents
Production process for potassium nitrogen compound fertilizer Download PDFInfo
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- CN102503635A CN102503635A CN2011103311973A CN201110331197A CN102503635A CN 102503635 A CN102503635 A CN 102503635A CN 2011103311973 A CN2011103311973 A CN 2011103311973A CN 201110331197 A CN201110331197 A CN 201110331197A CN 102503635 A CN102503635 A CN 102503635A
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Abstract
The invention discloses a production process for a potassium nitrogen compound fertilizer to solve the problems of complicated flow, high difficulty in controlling, high energy consumption and high possibility of blocking granulating nozzles of a slurry granulating process and a melt granulating process in the conventional potassium nitrogen compound fertilizer production process. The production process for the potassium nitrogen compound fertilizer comprises the following steps of: adding ammonium chloride, urea, potassium chloride and calcium carbonate into a stirrer in a ratio and stirring uniformly; granulating the uniformly stirred raw materials in a granulating disc to obtain a semi-finished potassium nitrogen compound fertilizer; and drying, cooling and screening the semi-finished potassium nitrogen compound fertilizer to obtain the finished potassium nitrogen compound fertilizer, wherein the potassium nitrogen compound fertilizer comprises the following components in part by weight: 43 to 45 parts of ammonium chloride, 31 parts of urea, 8 parts of potassium chloride and 16 to 18 parts of calcium carbonate. Production equipment and a process flow are simplified, and the production process is particularly suitable for large-scale mechanical production; and the produced potassium nitrogen compound fertilizer has uniform, smooth and good-luster granules.
Description
Technical field
The present invention relates to the production technique of agricultural, be specially the fertile production technique of a kind of nitrogen potassium compound with chemical fertilizer.
Background technology
Composite fertilizer has that the nutrient proportioning is free, utilization rate of fertilizer is high, good physical performance, use advantage such as convenient and obtained using widely, and can suitably adjust nutrient content to the conditions of demand of nitrogen phosphorus potassium according to soil characteristic and farm crop and improve crop yield and quality.Investigation demonstration nitrogen phosphorus joins to execute than crude protein, crude fat and glue denseness in single nitrogen fertilizer application crop kernel has raising in various degree; When nitrogenous fertilizer and potassium fertilizer application, sweet taste is increased, good palatability, commodity value is high.Nitrogen phosphorus potassium is joined to execute and can be coordinated fertilizer provision from soil and crop and need fertile supplydemand relationship; Make that macroelement and trace element combine in the soil; Satisfy crop at each growth phase of whole growing to various nutrient demand; Reach the purpose of improving crop inherence and exterior quality, improve the commodity of agricultural-food.So being carried out secondary processing, base fertilizer such as urea, general calcium, phosphorus ammonium, Repone K etc. process the inexorable trend that composite fertilizer is modern fertilizer industry development.
At present, the agglomeration technique that particle nitrogen potassium compound is fertile mainly is the slurry process granulation process by the exploitation of Shanghai research institute: a base fertilizer part is to send into tablets press with the slip form (slip can be urea soln or melt; Also can be the eutectoid point compound that urea soln and Repone K or vitriolate of tartar generate), slip is coated with or is bonded to particle as liquid phase and other powder shape raw material and returning charge in tablets press.Multi-form according to tablets press, this technology can be divided into again: (1) rotary drum prilling process, (2) disk granulation process, (3) spray granulating technology, (4) biaxial granulation technology, (5) fluidized bed granulation process, (6) rotary drum curtain granulation process.This technology exists energy consumption big, problems such as technical process complicacy; As major nitrogen source, cost is higher with urea.Make its granulated production technique of reuniting less about direct adding additive both at home and abroad at present.
Shanghai Chemical Research Inst discloses a kind of composite fertilizer production technique of fused mass granulating.This technology is directly utilized the urea soln and the Repone K melting mixing of one section of factory that makes urea or dual circulation, and it is fertile to adopt sprinkling pelleting to produce nitrogen potassium compound.This method exists complicated operation, prilling spry to be prone to problems such as obstruction.
Chinese patent CN101423433A discloses a kind of preparation method of circular granule nitrogen and potassium fertilizer, and this method is that sulfuric acid, synthetic ammonia, washing water are generated ammonium sulfate slurry through tubular reactor, it is sprayed directly on carries out granulation on the material in the rotary drum granulator.This complex process equipment, wayward, big calorimetric is emitted in reaction, and is strict to the requirement of equipment.
Summary of the invention
The present invention exists with fused mass granulating technique in order to solve in the existing nitrogen potassium production of compound fertilizer technology slurry granulation technology that flow process is complicated, wayward, energy consumption is big, the susceptible to plugging problem of prilling spry, and a kind of production technique of nitrogen potassium compound fertilizer is provided.
The present invention adopts following technical scheme to realize: the production technique that nitrogen potassium compound is fertile may further comprise the steps:
(1) ammonium chloride, urea, Repone K, lime carbonate are added in the whisking appliance in proportion stirs;
(2) raw material after will stirring is sent into granulating disc and is carried out granulation, forms the fertile work in-process of nitrogen potassium compound;
(3) the fertile work in-process of nitrogen potassium compound are dried, cool off, sieved, obtain the fertile finished product of nitrogen potassium compound;
The parts by weight of each component are 43 ~ 45 parts of ammonium chlorides, 31 parts in urea, 8 parts in Repone K, 16 ~ 18 parts in lime carbonate in the described step (1).
Beneficial effect of the present invention is following:
1, the present invention adopts inorganic calcium salt as additive, has wide material sources, nontoxic, advantages of cheap price.And the moderate-element Ca that contains in the calcium salt can promote growing of farm crop; Finished particle is uniform and smooth to be white in color, and granulating rate can reach 70 ~ 80%.
2, the present invention,, has reduced one-tenth and has produced cost as auxiliary material as basic nitrogenous source with ammonium chloride.Directly add the additive calcium salt and get final product granulating, need not raw materials melt and spray, production unit and technical process have been simplified in the heat energy consumption of having saved fused mass granulating technique.Be particularly suitable for mass mechanized production, the nitrogen potassium compound fertilizer granule of being produced is even, smooth and glossiness is good.
3, the present invention adopts the agglomeration granulation technology, and technical process is simple, and throughput is big, can realize large-scale industrialization production.
Embodiment
The production technique that nitrogen potassium compound is fertile may further comprise the steps:
(1) ammonium chloride, urea, Repone K, lime carbonate are added in the whisking appliance in proportion stirs;
(2) raw material after will stirring is sent into granulating disc and is carried out granulation, forms the fertile work in-process of nitrogen potassium compound;
(3) the fertile work in-process of nitrogen potassium compound are dried, cool off, sieved, obtain the fertile finished product of nitrogen potassium compound;
The parts by weight of each component are 43 ~ 45 parts of ammonium chlorides, 31 parts in urea, 8 parts in Repone K, 16 ~ 18 parts in lime carbonate in the described step (1).
Lime carbonate is selected light calcium carbonate for use in the described step (1).
In the described step (2), the pitch angle of granulating disc is 45 ° ~ 50 °, and in granulation process, adds steam.
In the described step (3), the inlet temperature of dryer is 150 ~ 180 ℃, and temperature out is 45 ~ 55 ℃; The fertile work in-process of nitrogen potassium compound after the oven dry sieve through overcooling, and screening obtains the particle that particle diameter is 2 ~ 4mm through finished product sieve again.
In the practical implementation process, the nitrogen potassium compound fertilizer that is respectively 25-0-5 with npk nutrient is example, specifies specific embodiments of the present invention:
Embodiment 1
With basic material (ammonium chloride: urea: Repone K: the continuously feeding 2 ~ 3t/h of lime carbonate=45:31:8:16) by a certain percentage; Join in the whisking appliance that diameter is 1.8m and mix; Be sent to diameter after stirring and be 2.4m, obliquity and be in 50 ° the granulating disc and carry out granulation, add an amount of steam to help granulating according to the humidity of batching.The work in-process of gained are 150 ℃ through inlet temperature, and temperature out is that to choose particle diameter be that the particle of 2 ~ 4mm is as finished product in 50 ℃ drying machine drying, cooling back screening.Measure the nutrient and the moisture content of finished product at last.
Granulating disc is made particle work in-process particle diameter about 1 ~ 2mm less than normal, and oven dry back uniform particles is white in color, and particle diameter reaches 2 ~ 4mm, and qualification rate reaches 50.6%, anti-crushing power >=20N.
Embodiment 2
With basic material (ammonium chloride: urea: Repone K: the continuously feeding 2 ~ 3t/h of lime carbonate=44:31:8:17) by a certain percentage; Join in the whisking appliance that diameter is 1.8m and mix; Be sent to diameter after stirring and be 2.4m, obliquity and be in 47 ° the granulating disc and carry out granulation, add an amount of steam to help granulating according to the humidity of batching.The work in-process of gained are through being 180 ℃ through inlet temperature, and temperature out is that to choose particle diameter be that the particle of 2 ~ 4mm is as finished product in 55 ℃ drying machine drying, the screening of cooling back.Measure the nutrient and the moisture content of finished product at last.
The work in-process particle diameter that granulating disc comes out is that the particle about 2mm is on the high side, and 15min is after the uniform particles that dram is come out is white in color, and particle diameter reaches 3 ~ 4mm, and qualification rate reaches 62.3%, anti-crushing power >=20N.
Embodiment 3
With basic material (ammonium chloride: urea: Repone K: the continuously feeding 2 ~ 3t/h of lime carbonate=43:31:8:18) by a certain percentage; Join in the whisking appliance that diameter is 1.8m and mix; Be sent to diameter after stirring and be 2.4m, obliquity and be in 45 ° the granulating disc and carry out granulation, add an amount of steam to help granulating according to the humidity of batching.The work in-process of gained are 170 ℃ through inlet temperature, and temperature out is that to choose particle diameter be that the particle of 2 ~ 4mm is as finished product in 45 ℃ drying machine drying, cooling back screening.Measure the nutrient and the moisture content of finished product at last.
The particle work in-process particle diameter that granulating disc comes out is 2 ~ 3mm, and 15min is after the uniform particles that dram is come out is white in color, and particle diameter reaches 3 ~ 4mm, and qualification rate reaches 75.9%, anti-crushing power >=20N.
Claims (4)
1. the fertile production technique of a nitrogen potassium compound is characterized in that: may further comprise the steps:
(1) ammonium chloride, urea, Repone K, lime carbonate are added in the whisking appliance in proportion stirs;
(2) raw material after will stirring is sent into granulating disc and is carried out granulation, forms the fertile work in-process of nitrogen potassium compound;
(3) the fertile work in-process of nitrogen potassium compound are dried, cool off, sieved, obtain the fertile finished product of nitrogen potassium compound;
The parts by weight of each component are 43 ~ 45 parts of ammonium chlorides, 31 parts in urea, 8 parts in Repone K, 16 ~ 18 parts in lime carbonate in the described step (1).
2. the production technique that nitrogen potassium compound according to claim 1 is fertile is characterized in that: lime carbonate is selected light calcium carbonate for use in the said step (1).
3. the production technique that nitrogen potassium compound according to claim 2 is fertile, it is characterized in that: in the described step (2), the pitch angle of granulating disc is 45 ° ~ 50 °, and in granulation process, adds steam.
4. according to claim 2 or the fertile production technique of 3 described nitrogen potassium compounds, it is characterized in that: in the described step (3), the inlet temperature of dryer is 150 ~ 180 ℃, and temperature out is 45 ~ 55 ℃; The fertile work in-process of nitrogen potassium compound after the oven dry sieve through overcooling, and screening obtains the particle that particle diameter is 2 ~ 4mm through finished product sieve again.
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| CN2011103311973A CN102503635A (en) | 2011-10-27 | 2011-10-27 | Production process for potassium nitrogen compound fertilizer |
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| CN2011103311973A CN102503635A (en) | 2011-10-27 | 2011-10-27 | Production process for potassium nitrogen compound fertilizer |
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| CN102503635A true CN102503635A (en) | 2012-06-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992910A (en) * | 2012-12-28 | 2013-03-27 | 孔亦周 | Industrial production method of granular composite carbon fertilizer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1530349A (en) * | 2003-03-10 | 2004-09-22 | 铜陵化学工业集团有限公司 | Potassium chloride united pelleting process |
| CN101117299A (en) * | 2007-06-29 | 2008-02-06 | 东莞市大众农业科技有限公司 | Process for producing compound fertilizer by tower granulation |
| CN101575222A (en) * | 2009-06-05 | 2009-11-11 | 瓮福（集团）有限责任公司 | Method for producing ammonium sulphate grain products by using inorganic caking agent |
| CN102030585A (en) * | 2010-10-20 | 2011-04-27 | 山东省农业可持续发展研究所 | Corn special fertilizer in case of returning all straws to field in Huanghuai Plain and preparation method thereof |
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2011
- 2011-10-27 CN CN2011103311973A patent/CN102503635A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1530349A (en) * | 2003-03-10 | 2004-09-22 | 铜陵化学工业集团有限公司 | Potassium chloride united pelleting process |
| CN101117299A (en) * | 2007-06-29 | 2008-02-06 | 东莞市大众农业科技有限公司 | Process for producing compound fertilizer by tower granulation |
| CN101575222A (en) * | 2009-06-05 | 2009-11-11 | 瓮福（集团）有限责任公司 | Method for producing ammonium sulphate grain products by using inorganic caking agent |
| CN102030585A (en) * | 2010-10-20 | 2011-04-27 | 山东省农业可持续发展研究所 | Corn special fertilizer in case of returning all straws to field in Huanghuai Plain and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 许洪兴: "复合肥生产中的调理剂", 《磷肥与复肥》, vol. 20, no. 4, 31 July 2005 (2005-07-31), pages 49 - 50 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992910A (en) * | 2012-12-28 | 2013-03-27 | 孔亦周 | Industrial production method of granular composite carbon fertilizer |
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Application publication date: 20120620 |