CN101993277A - Production process of high tower melt-granulated compound fertilizer - Google Patents
Production process of high tower melt-granulated compound fertilizer Download PDFInfo
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- CN101993277A CN101993277A CN2009100658227A CN200910065822A CN101993277A CN 101993277 A CN101993277 A CN 101993277A CN 2009100658227 A CN2009100658227 A CN 2009100658227A CN 200910065822 A CN200910065822 A CN 200910065822A CN 101993277 A CN101993277 A CN 101993277A
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- repone
- urea
- compound fertilizer
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- granulated compound
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Abstract
The invention relates to a production process of a high tower melt-granulated compound fertilizer. Potassium chloride is added in the process of melting urea, and the temperatures of urine and slurry are reduced according to a characteristic that the melting temperature is reduced after the urea is mixed with the potassium chloride serving as a cosolvent. The liquid solid ratio of the slurry can be regulated so as to reduce the melting temperature of the urea, the melting capacity of urea melting equipment is improved, and the foundation for improving the yield is laid.
Description
Technical field
The present invention relates to a kind of high tower fused melt granulated compound fertilizer production technique.
Background technology
The general technology of high tower prilling: urea is through metering, fusion is made urine and is delivered to tempering tank, Repone K, the phosphorus ammonium, stopping composition is through metering, send into tempering tank after the processing, powder material and urine fully mix at tempering tank, flow into differential prilling spry by gravity, centrifugal force by the shower nozzle high speed rotating throws away countless small dropletss to mixed slurry, small droplets in prilling tower in the dropping process with tower in the air inversion contact heat-exchanging that rises, small droplets progressively is frozen into solid particulate by liquid with decrease of temperature, through cooling, screening, anti-caking is handled, packing is finished product.
There are several big problems in high tower prilling technology:
1, owing to do not have baking operation in the high tower process, requiring fusing urea is to add water, and steam consumption height, cost are high relatively;
2, owing to urea temperature of fusion height, require the bigger urea melting equipment of exploitation, realize the raising of high tower throughput, a lot of producers are owing to the restriction of urea melting equipment, and yield level is lower;
3, urea temperature of fusion height, equipment volume are huge, cause the biuret turnout to increase, and some producer's biuret surpasses 1.5%, and the harm that farm crop are brought can not be ignored;
4, some prescription slip is mobile poor, and production process control difficulty is big, fluctuation of service;
When 5, high nitrogen prescription was produced, because big, the high slurry temperature height that causes of temperature of urine ratio, product appearance was of poor quality.
Summary of the invention
The purpose of this invention is to provide a kind of high tower fused melt granulated compound fertilizer production technique, in the urea melting process, add Repone K, mix the characteristic that the back melt temperature reduces with Repone K according to urea, Repone K is as solubility promoter, reduce urine and slurry temperature, can regulate the slip liquid-solid ratio again, thereby solve a difficult problem that exists in the background technology.
In order to achieve the above object by the following technical solutions: a kind of high tower fused melt granulated compound fertilizer production technique may further comprise the steps:
A. urea is made urine through being metered into the urea melting groove, and back overflow enters in the tempering tank;
B. Repone K, phosphorus ammonium, stopping composition are sent in the tempering tank after metering, processing;
C. powder material and urine, Repone K eutectic fully mix at tempering tank, flow into differential prilling spry by gravity;
D. by the centrifugal force of shower nozzle high speed rotating mixed slurry is thrown away countless small dropletss, small droplets in prilling tower in the dropping process with tower in the air inversion contact heat-exchanging that rises, small droplets progressively is frozen into solid particulate by liquid with decrease of temperature;
E. solid particulate is finished product through cooling, screening, anti-caking processing, packing;
In step a, in urea, add Repone K, make the mixture of urea and Repone K enter fusion tank, the eutectic of urea and Repone K is made in fusion.
Among the step a, the Repone K moral amount of adding accounts for 3～5% of Repone K gross weight, and the Repone K of surplus adds in step b.
Among the step a, the weight part ratio that adds Repone K and urea is Repone K: urea=1: 10～15.
Among the step a, the Repone K moral amount of adding accounts for 4% of Repone K gross weight, and the weight part ratio that adds Repone K and urea is Repone K: urea=1: 10.
The eutectic temperature of urea and potassium chloride mixture is 116～125 ℃.
The present invention is in producing blending process, what enter the urea melting groove is the mixture of urea and Repone K, the eutectic temperature of urea and potassium chloride mixture is 116.7 ℃, take the production technique of Repone K as the urea solubility promoter, the Repone K that enters the urea melting groove accounts for 3～5% of batching, the ratio of Repone K and urea is 1: (10～15), the urea melt temperature is reduced to 120～125 ℃, pure relatively urea temperature of fusion has reduced by 15～16 ℃, thereby reduces steam consumption, reduce production costs.Facts have proved that the fertile steam consumption of ton can reduce about 40 kilograms,, can realize saving 600,000 yuan the whole year by daily output 500 tons, 100 yuan of calculating of steam ton valency.
The reduction of urea melting temperature has improved the melt capacity of urea melting equipment, lays the first stone for improving output; From the actual analysis data, the reduction of urea melting temperature, the finished product biuret is reduced to 0.8-1.0% by 1.2-1.5%, has reduced the biuret generation, has improved the inner quality of product; The reduction of urine temperature reduces slurry temperature, is that product particle increases, and particle is rounding more, improves the visual appearance of product; Solid Repone K becomes liquid phase after adding the dissolving of urea melting groove, and amount of liquid phase is increased, and the solid phase amount reduces simultaneously, improve the liquid-solid ratio of slip, and the reduction of slurry temperature reduces the production process side reaction, improve the slip flowability, make stable operation, throughput improves.
Embodiment:
Embodiment 1
Produce the 28-6-6 prescription at the high tower production line, theoretical prescription (weight %) is urea 58%, Repone K 10%, monoammonium phosphate 13.5%, ground dolomite 18.5%.Repone K is divided into two places and enters system, wherein 5% Repone K and 58% urea be mixed into the urea melting groove (have on the tower, the producer that has is under tower), (Repone K: urea=1: 11.6), temperature is controlled at 120～125 ℃, after this sends into tempering tank;
Solid materialss such as Repone K, monoammonium phosphate, stopping composition are removed foreign material, block through screening, press proportion scale 5% Repone K, 13.5% monoammonium phosphate, the metering of 18.5% ground dolomite after, send into tempering tank; Liquid-solid ratio in the tempering tank was brought up to 63: 37 by 58: 42;
Powder material and urea and Repone K eutectic fully mix in tempering tank, slurry temperature is controlled in 110～115 ℃, mixing time control 4 minutes, slip to differential prilling spry, leans on the centrifugal force of differential shower nozzle high speed rotating that mixed slurry is thrown away countless small dropletss by run by gravity;
Small droplets in prilling tower in the dropping process with tower in air (in 40 ℃ of the temperature) the counter current contact heat exchange of rising, small droplets progressively is frozen into solid particulate by liquid with decrease of temperature, temperature is reduced to 40～70 ℃ when dropping down onto at the bottom of the tower, sends into cooler by finished belt after hopper is collected.
The finished product treating processes comprises continuation cooling, screening, coating, packaging process, in cooler the moisture that removes is spread on the particle top layer as yet, by the air of the bed that flows steam is taken away, and reaches the cooling purpose simultaneously, and temperature of charge is cooled to below 45 degree; Cooled material is carried through bucket and is entered trommel screen, will be less than 1.5mm, screen out greater than the particle of 4.5mm; The finished product that sifts out can be packaged as finished product after anti-caking is handled; Fines and macrobead return the tempering tank secondary granulation.
Embodiment 2
Produce the 28-6-6 prescription at the high tower production line, theoretical prescription (weight %) is urea 60%, Repone K 10%, monoammonium phosphate 15%, ground dolomite 15%.
Wherein 4% Repone K and 60% urea are mixed into the urea melting groove (Repone K: urea=1: 15), temperature are controlled at 120 ℃, after this sends into tempering tank.
Solid materialss such as the Repone K of surplus, monoammonium phosphate, ground dolomite are removed foreign material, block through screening, send into tempering tank then.
All the other steps are with embodiment 1.
Embodiment 3
Produce the 28-6-6 prescription at the high tower production line, theoretical prescription (weight %) is urea 60%, Repone K 12%, monoammonium phosphate 12%, ground dolomite 16%.
Wherein 5% Repone K and 60% urea are mixed into the urea melting groove (Repone K: urea=1: 10), temperature are controlled at 125 ℃, after this sends into tempering tank.
Solid materialss such as the Repone K of surplus, monoammonium phosphate, ground dolomite are removed foreign material, block through screening, send into tempering tank then.
All the other steps are with embodiment 1.
Embodiment 4
Produce the 28-6-6 prescription at the high tower production line, theoretical prescription (weight %) is urea 60%, Repone K 15%, monoammonium phosphate 12%, ground dolomite 18%.
Wherein 3% Repone K and 60% urea are mixed into the urea melting groove (Repone K: urea=1: 13.3), temperature are controlled at 123 ℃, after this sends into tempering tank.
Solid materialss such as the Repone K of surplus, monoammonium phosphate, ground dolomite are removed foreign material, block through screening, send into tempering tank then.
All the other steps are with embodiment 1.
Embodiment 5
Produce the 28-6-6 prescription at the high tower production line, theoretical prescription (weight %) is urea 55%, Repone K 13%, monoammonium phosphate 15%, ground dolomite 17%.
Wherein 4% Repone K and 60% urea are mixed into the urea melting groove (Repone K: urea=1: 10.6), temperature are controlled at 124 ℃, after this sends into tempering tank.
Solid materialss such as the Repone K of surplus, monoammonium phosphate, ground dolomite are removed foreign material, block through screening, send into tempering tank then.
All the other steps are with embodiment 1.
Embodiment 6
Produce the 28-6-6 prescription at the high tower production line, theoretical prescription (weight %) is urea 50%, Repone K 15%, monoammonium phosphate 18%, ground dolomite 22%.
Wherein 3% Repone K and 60% urea are mixed into the urea melting groove (Repone K: urea=1: 11), temperature are controlled at 122 ℃, after this sends into tempering tank.
Solid materialss such as the Repone K of surplus, monoammonium phosphate, ground dolomite are removed foreign material, block through screening, send into tempering tank then.
All the other steps are with embodiment 1.
Claims (5)
1. high tower fused melt granulated compound fertilizer production technique may further comprise the steps:
A. urea is made urine through being metered into the urea melting groove, and back overflow enters in the tempering tank;
B. Repone K, phosphorus ammonium, stopping composition are sent in the tempering tank after metering, processing;
C. powder material and urine, Repone K eutectic fully mix at tempering tank, flow into differential prilling spry by gravity;
D. by the centrifugal force of shower nozzle high speed rotating mixed slurry is thrown away countless small dropletss, small droplets in prilling tower in the dropping process with tower in the air inversion contact heat-exchanging that rises, small droplets progressively is frozen into solid particulate by liquid with decrease of temperature;
E. solid particulate is finished product through cooling, screening, anti-caking processing, packing;
It is characterized in that: in step a, add Repone K in urea, make the mixture of urea and Repone K enter fusion tank, the eutectic of urea and Repone K is made in fusion.
2. high tower fused melt granulated compound fertilizer production technique according to claim 1 is characterized in that: among the step a, the Repone K moral amount of adding accounts for 3～5% of Repone K gross weight, and the Repone K of surplus adds in step b.
3. high tower fused melt granulated compound fertilizer production technique according to claim 1 is characterized in that: among the step a, the weight part ratio that adds Repone K and urea is Repone K: urea=1: 10～15.
4. high tower fused melt granulated compound fertilizer production technique according to claim 2 is characterized in that: among the step a, the Repone K moral amount of adding accounts for 4% of Repone K gross weight, and the weight part ratio that adds Repone K and urea is Repone K: urea=1: 10.
5. according to any described high tower fused melt granulated compound fertilizer production technique in the claim 1～4, it is characterized in that: the eutectic temperature of urea and potassium chloride mixture is 120～125 ℃.
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| CN 200910065822 CN101993277B (en) | 2009-08-18 | 2009-08-18 | Production process of high tower melt-granulated compound fertilizer |
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| CN 200910065822 CN101993277B (en) | 2009-08-18 | 2009-08-18 | Production process of high tower melt-granulated compound fertilizer |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102633553A (en) * | 2012-04-27 | 2012-08-15 | 深圳市芭田生态工程股份有限公司 | Method for producing high-tower ammonium phosphate compound fertilizer |
| CN103626568A (en) * | 2012-08-29 | 2014-03-12 | 谢树才 | Preparation technology for double-enzyme zinc and ammonium composite fertilizer |
| CN103664301A (en) * | 2013-12-23 | 2014-03-26 | 史丹利化肥股份有限公司 | Tower-type melt granulation water-soluble fertilizer containing fulvic acid potassium macroelement and preparation method for fertilizer |
| CN103708852A (en) * | 2013-08-12 | 2014-04-09 | 绥芬河市石英经贸有限公司 | Simple-substance high content round hollow granular potassium fertilizer and preparation method thereof |
| CN106008003A (en) * | 2016-05-31 | 2016-10-12 | 史丹利化肥扶余有限公司 | High tower granulation produced high concentration compound fertilizer and production method thereof |
| CN106116850A (en) * | 2016-06-25 | 2016-11-16 | 深圳市芭田生态工程股份有限公司 | The urea-base compound fertilizer that a kind of air prilling produces |
| 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 |
| CN108069879A (en) * | 2016-11-17 | 2018-05-25 | 湖北富来地金润肥业有限公司 | Potassium chloride reduces the preparation method of urea fusing point |
| CN109384251A (en) * | 2018-12-12 | 2019-02-26 | 青海盐湖工业股份有限公司 | A kind of prilling process of potassium nitrate and its potassium nitrate granules of preparation |
| CN110156542A (en) * | 2019-04-30 | 2019-08-23 | 宜昌阿波罗肥业有限公司 | Compound fertilizer granulating processing unit (plant) and granulation processing method |
| CN113816790A (en) * | 2021-09-18 | 2021-12-21 | 阿克苏嘉邦肥业有限公司 | Preparation method and application of high-tower urea-based compound fertilizer viscosity reducer |
Family Cites Families (4)
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| CN100503524C (en) * | 2005-09-13 | 2009-06-24 | 史丹利化肥股份有限公司 | Melt slime granulating composite fertilizer and its production method |
| CN101003453B (en) * | 2006-01-17 | 2010-05-12 | 广东福利龙复合肥有限公司 | High tower graining method for producing composite (mixed) fertilizer |
| 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 |
| CN100586906C (en) * | 2007-09-20 | 2010-02-03 | 兖矿鲁南化肥厂 | Production process for high tower roller composite fertilizer |
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2009
- 2009-08-18 CN CN 200910065822 patent/CN101993277B/en not_active Expired - Fee Related
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| CN102633553A (en) * | 2012-04-27 | 2012-08-15 | 深圳市芭田生态工程股份有限公司 | Method for producing high-tower ammonium phosphate compound fertilizer |
| CN103626568B (en) * | 2012-08-29 | 2015-08-12 | 谢树才 | A kind of two enzyme zinc ammonium compound fertilizer preparation technology |
| CN103626568A (en) * | 2012-08-29 | 2014-03-12 | 谢树才 | Preparation technology for double-enzyme zinc and ammonium composite fertilizer |
| CN103708852B (en) * | 2013-08-12 | 2016-04-06 | 绥芬河市石英经贸有限公司 | Simple-substance high content round hollow granular potassium fertilizer and preparation method thereof |
| CN103708852A (en) * | 2013-08-12 | 2014-04-09 | 绥芬河市石英经贸有限公司 | Simple-substance high content round hollow granular potassium fertilizer and preparation method thereof |
| CN103664301B (en) * | 2013-12-23 | 2015-05-20 | 史丹利化肥股份有限公司 | Tower-type melt granulation water-soluble fertilizer containing fulvic acid potassium macroelement and preparation method for fertilizer |
| CN103664301A (en) * | 2013-12-23 | 2014-03-26 | 史丹利化肥股份有限公司 | Tower-type melt granulation water-soluble fertilizer containing fulvic acid potassium macroelement and preparation method for fertilizer |
| CN106008003A (en) * | 2016-05-31 | 2016-10-12 | 史丹利化肥扶余有限公司 | High tower granulation produced high concentration compound fertilizer and production method thereof |
| CN106116850A (en) * | 2016-06-25 | 2016-11-16 | 深圳市芭田生态工程股份有限公司 | The urea-base compound fertilizer that a kind of air prilling produces |
| CN108069879A (en) * | 2016-11-17 | 2018-05-25 | 湖北富来地金润肥业有限公司 | Potassium chloride reduces the preparation method of urea fusing point |
| 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 |
| CN109384251A (en) * | 2018-12-12 | 2019-02-26 | 青海盐湖工业股份有限公司 | A kind of prilling process of potassium nitrate and its potassium nitrate granules of preparation |
| CN110156542A (en) * | 2019-04-30 | 2019-08-23 | 宜昌阿波罗肥业有限公司 | Compound fertilizer granulating processing unit (plant) and granulation processing method |
| CN113816790A (en) * | 2021-09-18 | 2021-12-21 | 阿克苏嘉邦肥业有限公司 | Preparation method and application of high-tower urea-based compound fertilizer viscosity reducer |
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| CN101993277B (en) | 2013-07-03 |
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