CN100586906C - Production process for high tower roller composite fertilizer - Google Patents
Production process for high tower roller composite fertilizer Download PDFInfo
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- CN100586906C CN100586906C CN200710113826A CN200710113826A CN100586906C CN 100586906 C CN100586906 C CN 100586906C CN 200710113826 A CN200710113826 A CN 200710113826A CN 200710113826 A CN200710113826 A CN 200710113826A CN 100586906 C CN100586906 C CN 100586906C
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Abstract
The present invention discloses a produce process for a high-tower roller composite fertilizer, which has the advantages of advanced technical, much lower cost, less pollution, higher fertilizer utilization ratio, wider cover ratio of the composite fertilizer nutrition, larger elasticity and much better operation and so on. The method is that: (1) the carbamide solution with the concentration of 99.6 percent is added into a melting roller slot; and besides, ammonium phosphor acid, potassium chloride or potassium sulfate, additive and emulsification are heated to 50-150 Celsius system and thento be put into the melting roller slot; the material slurry in the melting roller slot is divided into two sections through a material slurry pump: one section is transported to a grain-tower for grilling; and another section enters a grilling kettle; (2) after being grilled in the grain-tower, the qualified product is transported to the finished product storehouse; and the disqualified product used as a crystal type is transported to the grilling kettle; (3) the melting slurry material in the grilling kettle is contacted with the crystal type to make the crystal bigger; the product after being reacted is transported to a vibrating screen; (4) the product after being filtered is transported to a cooling grilling kettle for cooling to less than 50 Celsius system and then is put into the finished product storehouse; (5) the tail gas in the grilling kettle is transported to a washing device through an air-absorbing device; the product after being washed and concentrated is put into a mixing material storehouse.
Description
Technical field
The present invention relates to a kind of compound fertilizer production technology, relate in particular to a kind of production process for high tower roller composite fertilizer that urea liquation and P-K fertilizer are carried out after molten mixing under the prilling tower.
Background technology
The production of present domestic composite fertilizer (compound fertilizer) material exists the energy consumption height, pollutes problems such as many, that investment is big, and main production has granulating method, mortar jetting method, fused mass granulating method.Also there are deficiencies such as the product particle visual appearance is poor, granule strength is low, nutrient is inhomogeneous in the granulating method production technique, lacks the market competitiveness; The spray granulation maturation, but exist nitrogen content to hang down the little defective of use range; The fused mass granulating method can be produced high-nitrogen compound fertilizer, but product specification is subjected to the bigger products production of certain restriction, particularly particle certain degree of difficulty is arranged.And the production capacity of domestic urea product enlarges day by day, and the direct fertilising of single nutrient urea can not adapt to the requirement that applies fertilizers scientifically, can not reach the requirement of surveying the slow control fertilising of native prescription, and chemical fertilizer utilization ratio is low, and brings comparatively serious environmental pollution.So it is imperative developing direction that urea is used for many kinds of secondary processing production high density composite fertilizer.
China's compound manure production starts from the seventies, is developed rapidly after entering the eighties.Especially since nineteen ninety, composite fertilizer is almost annual increasing the speed increase of 1,000,000 tons (quantities of goods produced), and progressively turns to and produce the high-concentration compound N-P-K fertilizer material.However, China's compound manure amount of application only accounts for about 25% of the total amount of application of chemical fertilizer at present, and domestic compound manure output only accounts for 20% of chemical fertilizer ultimate production, and mainly is the lower concentration compound fertilizer product.According to Ministry of Agriculture's requirement, the Eleventh Five-Year Plan period require high-concentration compound fertilizer material quantity to account for 30% of chemical fertilizer total amount, promptly need 1,600 ten thousand tons of high-concentration compound fertilizer material at least.Therefore, the market has openings of high-concentration compound fertilizer material is very big.
Granulating method, the mortar jetting method industrial scale of China's compound manure production technique are less than normal, and most factories throughput is ten thousand tons/year of 1-10, and product is based on the lower concentration compound manure, and the energy consumption height, pollute many, invest big etc.Along with the expansion day by day of domestic urea production, urea has become the main chemical nitrogen fertilizer of China, and it is used for the quantity increase gradually that secondary processing is produced compound manure.But, when being sources of nitrogen employing granulating method technology commonly used or mortar jetting method production of compound fertilizer explained hereafter high-concentration compound fertilizer material with urea, 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.
Summary of the invention
Purpose of the present invention is exactly single at man of present factory that makes urea product, market fluctuation is big, added value of product is hanged down problem, a kind of technology advanced person that has is provided, cost is lower, pollute fewly, that fertilizer efficiency utilization ratio height, composite fertilizer's nutrients ratio are contained is wide, the production process for high tower roller composite fertilizer of advantages such as elasticity big, good operability.
For achieving the above object, the present invention adopts following technical scheme:
A kind of production process for high tower roller composite fertilizer, its method be,
(1) concentration is that 99.6% urea liquation is sent into the molten groove that mixes, and sends into the molten groove that mixes after simultaneously monoammonium phosphate, Repone K or vitriolate of tartar, additive, emulsifying agent being heated to 50～150 ℃; The slip that molten mixed trench bottom comes out divides two-way by shurry pump: the one tunnel is delivered to the prilling tower granulation; Another road directly enters granulating rotating drum;
(2) after the prilling tower granulation, qualified product send stockyard; Substandard product is discharged by the bottom and is delivered to granulating rotating drum as crystal seed;
(3) the melting slip in the granulating rotating drum contacts with crystal seed, and crystal seed is grown up, and reaction back products obtained therefrom is delivered to bolting;
(4) the qualified product in screening back deliver to drum cooler and be cooled to≤50 ℃, send into finished bin then;
(5) tail gas of granulating rotating drum is delivered to washer by induced draft fan, and products obtained therefrom is sent into blending bun.
In the described step (1), the ratio of monoammonium phosphate, Repone K or vitriolate of tartar, additive, emulsifying agent is matched, and is ground to 40～70 orders according to composite fertilizer's nitrogen of being produced, phosphorus, potassium nutrition content; Above-mentioned material is carried to blending bun by bucket elevator, after the weighing belt weighing, sent into measuring chute then, and send into the rotary drum heater heats through belt conveyor by measuring chute; The tail gas of rotary drum well heater is sent into washer and is reclaimed.
In the described step (3), the molten trench bottom stock pump that connects material that mixes, shurry pump is sent the melting slip into slip nozzle in the granulating rotating drum, and slip is sprayed onto on the material curtain of rolling and contacts with crystal seed, and crystal seed is grown up.
In the described step (5), the washings concentration in the washer reaches at 43～45% o'clock, and washings is sent to the device vacuum preconcentrator; Washings is replenished by the phlegma in the technology, keeps the liquid level of washing tower bottom.
The invention has the beneficial effects as follows: it utilizes the finished product urine to make composite fertilizer's slip under tower, by dedicated pump, is transported to cat head, carries out granulation, produces crystal seed, changes the granulation cylinder composite fertilizer that manufactures a finished product over to.Its technology advanced person needn't resemble and be delivered to the granulation cat head after composite fertilizer high tower prilling producer melts with granular urea, mixes the back granulation, and cost reduces greatly.This method can be produced the urea-base compound fertilizer of total nutrient 20～56%, and it is big that nutrient is regulated model, can arbitrarily add various middle trace elementses, produces special-purpose fertile.The product hardness height of granulating rotating drum, anti-accumulating, but slowly-releasing, fertilizer efficiency utilization ratio height, low in the pollution of the environment.Urinate basic melt tower granulation technology and directly utilize the urea strong solution, broken melting process when having saved the sprinkling pelleting process of urea liquation and solid finished urea compound fertilizer making has been simplified Production Flow Chart greatly, has improved environment, reduce the content of biuret, improved quality product.This technology makes full use of the heat energy of fusing urea, and moisture content of material is low, and drying-free has been saved energy consumption and investment.The qualified percentage height of while particulate product, so production process returning charge amount is few, and products obtained therefrom particle nutrient is even, smooth surface, mellow and full, prevented from caking has the higher market competitiveness, is the process for cleanly preparing of realizing sustainable development, cleaner production.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Wherein, 1. travelling belt, 2. bucket elevator, 3. blending bun, 4. weighing belt, 5. measuring chute, 6. rotary drum well heater, the 7. molten groove that mixes, 8. prilling tower, 9. shurry pump, 10. granulating rotating drum, 11. induced draft fans, 12. washer, 13. feed bins, 14. washing pumps, 15. vibratory screening apparatuss, 16. drum coolers, 17. finished bin.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment.
The present invention elder generation mixes groove 7 by pipe-line transportation to melting with 99.6% urea liquation; Simultaneously monoammonium phosphate, Repone K (or vitriolate of tartar), additive, emulsifying agent (0.1～0.3% has the emulsification slip to prevent that bumping from preventing the effect of finished product caking) are carried to blending bun 3 with travelling belt 1, bucket elevator 2 respectively, claim 4 meterings, screening, grind 40～70 with belt to order, send into measuring chute 5, after being mixed into rotary drum well heater 6 then and being heated to 50～150 ℃, add the molten groove 7 that mixes continuously.The molten slip that comes out groove 7 bottoms of mixing is by 9 fens two-way of shurry pump: the one tunnel is delivered to prilling tower 8 granulations, the qualified ganging of products packing in finished product screening back enters stockyard, underproof product enters granulating rotating drum 10 as composite fertilizer's crystal seed by bucket elevator 2, gained is the high strength complex fertilizer product, product specification can be adjusted at 2～8mm, hardness reaches more than the 27N, is 4 times of high tower prilling; Granulating rotating drum 10 is directly sent on another road.
Granulating rotating drum flow process:, send into granulating rotating drum 10 through bucket elevator 2 and make crystal seed by the small-particle composite fertilizer of prilling tower 8.Enter slip nozzle in the granulating rotating drum 10 by the melting slip of melting material stock pump 9, slip is sprayed onto on the material curtain of rolling and contacts with crystal seed, and crystal seed is grown up.Fluidization air is sent into fluidized-bed in the granulating rotating drum by the fluidization air gas blower.Fluidization air send granulating rotating drum through the fluidization air heater heats again during driving after design temperature, promptly stops heating after the ordinary production.
The finished product composite fertilizer that is sent by granulating rotating drum 10 sends into double-deck screen shale shaker 15 through bucket elevator 2.The oversize granule urea that sifts out at the superiors' screen cloth enters granulating rotating drum 10 with small-particle composite fertilizer under the orlop sieve and makes crystal seed after fragmentation.Oversize granule composite fertilizer also can sell separately.The granular compound fertilizer of drawing in the middle of two-layer compass screen surface is finished product, sends into drum cooler 16 through transfer roller and arrives≤50 ℃ through water quench, send finished bin 17, enters the packaging system packing and dispatches from the factory.
The gas that contains composite fertilizer's dust that induced draft fan 11 is discharged is sent into exhaust scrubber 12, goes into feed bin 13 through humidification is laggard, and the carbamide dust in the tail gas is sprayed the washings that gets off by feed bin 13 tops and absorbs, and enters atmosphere again after secondary washing.Composite fertilizer's dust content will be far below the dust content of domestic existing natural ventilation prilling tower emission gases, dustiness≤30mg/Nm3 in the tail gas.When washings concentration reached 43～45%, washings was sent to the device vacuum preconcentrator.Feed bin 13 bottoms are connected with washing pump 14, and washing pump 14 links to each other with the top of washer 12.Washings is replenished by the production equipment process condensate, keeps the liquid level of washing tower bottom.
Emulsifying agent of the present invention can be N, N-double hydroxyethyl laurylamide, but the high-nitrogen compound fertilizer of this technology production nitrogen content more than 40%, the product of its total nutrient content 20%-48%, N:16-41%, P (P
2O
5) 4-20%, K (K
2O) 4-25%, nitrogen, phosphorus, potassium nutrition content can be matched in above-mentioned scope.
Embodiment 1:
Complex fertilizer product specification: N-P
2O
5-K
2O=24-12-12, total nutrient 〉=48%.The urea liquation is mixed groove by pipe-line transportation to melting, monoammonium phosphate, Repone K, additive, emulsifying agent are carried to blending bun with bucket elevator respectively, claim metering, screening, grind 40～70 with belt to order, after being mixed into rotary drum heater heats to 50～150 ℃, add the molten groove that mixes continuously by conveyor.The slip that molten mixed trench bottom comes out divides two-way by shurry pump: the one tunnel is delivered to the prilling tower granulation, the qualified ganging of products packing in finished product screening back enters stockyard, underproof product enters granulating rotating drum as composite fertilizer's crystal seed, small-particle composite fertilizer by prilling tower and vibratory screening apparatus come sends into granulating rotating drum through transfer roller and makes crystal seed; Granulating rotating drum is directly sent on another road.The melting slip that is come by the melting material stock pump enters the slip nozzle in the granulating rotating drum, and slip is sprayed onto on the material curtain of rolling and contacts with crystal seed, and crystal seed is grown up.
The finished product composite fertilizer that is sent by granulating rotating drum sends into double-deck screen shale shaker through transfer roller.The oversize granule urea that sifts out at the superiors' screen cloth enters granulating rotating drum with small-particle composite fertilizer under the orlop sieve and makes crystal seed after fragmentation.Oversize granule composite fertilizer also can sell separately.The granular compound fertilizer of drawing in the middle of two-layer compass screen surface is finished product, sends into drum cooler through transfer roller and arrives≤50 ℃ through water quench, send finished product packing system packing to dispatch from the factory.
Embodiment 2:
Complex fertilizer product specification: N-P
2O
5-K
2O=15-15-15, total nutrient 〉=45%.The urea liquation is mixed groove by pipe-line transportation to melting, monoammonium phosphate, Repone K, additive, emulsifying agent are carried to blending bun with bucket elevator respectively, claim metering, screening, grind 40～70 with belt to order, after being mixed into rotary drum heater heats to 50～150 ℃, add the molten groove that mixes continuously by conveyor.The slip that molten mixed trench bottom comes out divides two-way by shurry pump: the one tunnel is delivered to the prilling tower granulation, the qualified ganging of products packing in finished product screening back enters stockyard, underproof product enters granulating rotating drum as composite fertilizer's crystal seed, small-particle composite fertilizer by prilling tower and vibratory screening apparatus come sends into granulating rotating drum through transfer roller and makes crystal seed; Another road directly enters granulating rotating drum.The melting slip that is come by the melting material stock pump enters the slip nozzle in the granulating rotating drum, and slip is sprayed onto on the material curtain of rolling and contacts with crystal seed, and crystal seed is grown up.
The finished product composite fertilizer that is sent by granulating rotating drum sends into double-deck screen shale shaker through transfer roller.The oversize granule urea that sifts out at the superiors' screen cloth enters granulating rotating drum with small-particle composite fertilizer under the orlop sieve and makes crystal seed after fragmentation.Oversize granule composite fertilizer also can sell separately.The granular compound fertilizer of drawing in the middle of two-layer compass screen surface is finished product, sends into drum cooler through transfer roller and arrives≤50 ℃ through water quench, send finished product packing system packing to dispatch from the factory.
Embodiment 3:
Complex fertilizer product specification: N-P
2O
5-K
2O=40-4-4, total nutrient 〉=48%.The urea liquation is mixed groove by pipe-line transportation to melting, monoammonium phosphate, Repone K, additive, emulsifying agent are carried to blending bun with bucket elevator respectively, claim metering, screening, grind 40～70 with belt to order, after being mixed into rotary drum heater heats to 50～150 ℃, add the molten groove that mixes continuously by conveyor.The slip that molten mixed trench bottom comes out divides two-way by shurry pump: the one tunnel is delivered to the prilling tower granulation, the qualified ganging of products packing in finished product screening back enters stockyard, underproof product enters granulating rotating drum as composite fertilizer's crystal seed, small-particle composite fertilizer by prilling tower and vibratory screening apparatus come sends into granulating rotating drum through transfer roller and makes crystal seed; Another road directly enters granulating rotating drum.The melting slip that is come by the melting material stock pump enters the slip nozzle in the granulating rotating drum, and slip is sprayed onto on the material curtain of rolling and contacts with crystal seed, and crystal seed is grown up.
The finished product composite fertilizer that is sent by granulating rotating drum sends into double-deck screen shale shaker through transfer roller.The oversize granule urea that sifts out at the superiors' screen cloth enters granulating rotating drum with small-particle composite fertilizer under the orlop sieve and makes crystal seed after fragmentation.Oversize granule composite fertilizer also can sell separately.The granular compound fertilizer of drawing in the middle of two-layer compass screen surface is finished product, sends into drum cooler through transfer roller and arrives≤50 ℃ through water quench, send finished product packing system packing to dispatch from the factory.
Claims (4)
1, a kind of production process for high tower roller composite fertilizer is characterized in that: its method is,
(1) concentration is that 99.6% urea liquation is sent into the molten groove that mixes, and sends into the molten groove that mixes after simultaneously monoammonium phosphate, Repone K or vitriolate of tartar, additive, emulsifying agent being heated to 50～150 ℃; The slip that molten mixed trench bottom comes out divides two-way by shurry pump: the one tunnel is delivered to the prilling tower granulation; Another road directly enters granulating rotating drum;
(2) after the prilling tower granulation, qualified product send stockyard; Substandard product is discharged by the bottom and is delivered to granulating rotating drum as crystal seed;
(3) the melting slip in the granulating rotating drum contacts with crystal seed, and crystal seed is grown up, and reaction back products obtained therefrom is delivered to bolting;
(4) the qualified product in screening back deliver to drum cooler and be cooled to≤50 ℃, send into finished bin then;
(5) tail gas of granulating rotating drum is delivered to washer by induced draft fan, and products obtained therefrom is sent into blending bun.
2, production process for high tower roller composite fertilizer according to claim 1, it is characterized in that: in the described step (1), the ratio of monoammonium phosphate, Repone K or vitriolate of tartar, additive, emulsifying agent is according to composite fertilizer's nitrogen of being produced, phosphorus, the apolegamy of potassium nutrition content, and be ground to 40～70 orders, above-mentioned material is carried to blending bun by bucket elevator, after the weighing belt weighing, send into measuring chute then, and send into the rotary drum heater heats through belt conveyor by measuring chute; The tail gas of rotary drum well heater is sent into washer.
3, production process for high tower roller composite fertilizer according to claim 1, it is characterized in that: in the described step (3), the molten trench bottom stock pump that connects material that mixes, shurry pump is sent the melting slip into slip nozzle in the granulating rotating drum, slip is sprayed onto on the material curtain of rolling and contacts with crystal seed, and crystal seed is grown up.
4, production process for high tower roller composite fertilizer according to claim 1 is characterized in that: in the described step (5), the washings concentration in the washer reaches at 43～45% o'clock, and washings is sent to the device vacuum preconcentrator; Washings is replenished by the phlegma in the technology, keeps the liquid level of washing tower bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN200710113826A CN100586906C (en) | 2007-09-20 | 2007-09-20 | Production process for high tower roller composite fertilizer |
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| CN200710113826A CN100586906C (en) | 2007-09-20 | 2007-09-20 | Production process for high tower roller composite fertilizer |
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| CN101121618A CN101121618A (en) | 2008-02-13 |
| CN100586906C true CN100586906C (en) | 2010-02-03 |
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| CN200710113826A Expired - Fee Related CN100586906C (en) | 2007-09-20 | 2007-09-20 | Production process for high tower roller composite fertilizer |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101402534B (en) * | 2008-09-26 | 2010-12-15 | 河南金谷干燥工程技术有限公司 | Fluidization discharge vibration cooling apparatus for high-column granulation of chemical fertilizer |
| CN101993277B (en) * | 2009-08-18 | 2013-07-03 | 河南财鑫实业化工有限责任公司 | Production process of high tower melt-granulated compound fertilizer |
| CN104230440B (en) * | 2014-09-05 | 2016-09-28 | 山东聊城鲁西硝基复肥有限公司 | A kind of production method utilizing cylinder to produce granule one sulfenyl high-nitrogen compound fertilizer |
| CN105036868A (en) * | 2015-08-18 | 2015-11-11 | 灵山县骄丰化工有限公司 | Compound fertilizer pelletizing and spraying system and operating method thereof |
| CN106542857A (en) * | 2015-09-20 | 2017-03-29 | 辽宁嘉吉农业生产资料有限公司 | A kind of new formulation fertilizer production equipment |
| CN107652031A (en) * | 2017-09-22 | 2018-02-02 | 河南心连心化肥有限公司 | A kind of device and method using composite fertilizer's returning charge production high-strength complex Hefei |
| CN113952914B (en) * | 2021-11-29 | 2023-03-10 | 九禾股份有限公司 | Production device and production method of urea sulfate formaldehyde compound fertilizer |
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| EP0850878B1 (en) * | 1996-12-31 | 2001-09-19 | Kaltenbach - Thuring S.A. | Process and installation for the production of porous ammonium nitrate |
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Non-Patent Citations (2)
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