CN1083815C - Method for prodcing high effective ureido compound fertilizer - Google Patents
Method for prodcing high effective ureido compound fertilizer Download PDFInfo
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- CN1083815C CN1083815C CN98111778A CN98111778A CN1083815C CN 1083815 C CN1083815 C CN 1083815C CN 98111778 A CN98111778 A CN 98111778A CN 98111778 A CN98111778 A CN 98111778A CN 1083815 C CN1083815 C CN 1083815C
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- urea
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- base compound
- urine
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Abstract
The present invention relates to a method for producing a high-efficiency urea-based compound fertilizer. A melt urea liquid made of urea for industrial production or a melt urea liquid made by heating solid urea is prepared with potassium chloride or potassium sulfate to form slurry containing N and K2O, the slurry is atomized and then is sprinkled on solid particle urea, and zeolite powder or powder material composed of a phosphorus fertilizer, a potassium fertilizer and zeolite powder for granulation, and then forced cooling, sieving and metering packaging are carried out to directly form a high-efficiency large-particle NK urea-based compound fertilizer or a high-efficiency NPK three-element urea-based compound fertilizer. The method has the characteristics of simplifying a fertilizer preparing technology, reducing investment, saving and reducing energy consumption and enhancing the utilization rate of the N.
Description
The present invention relates to a kind of production method of directly producing urea-base compound fertilizer with molten urea solution.
At present, in order to satisfy the needs of modern fertilization compositions based on earth measurement, the process of compoundization of chemical fertilizer has been accelerated greatly both at home and abroad, and the usage quantity of some national composite fertilizers accounts for the 70%-80% of chemical fertilizer total amount.Except studying and using with phosphoric acid, phosphate fertilizer etc. is the composite fertilizer of matrix, also has the compound fertilizer of urea pulverizing with other phosphorus, potash fertilizer mixing granulation.As ammonium chloride (urea)-phosphoric acid-Repone K series of early stage dry powder blend granulating method, and patent of invention is nuclear " Wrapped fertilizer and the manufacture method " of wrapping up and " production technique of urea fused-salt granulating method urine-base compound fertilizer " afterwards or the like with the granular urea.Their common feature is that chemical fertilizer (also the claiming chemical fertilizer) process finished product is pulverized, and method such as granulation or parcel, hot melt is carried out the chemical fertilizer secondary processing again.Owing to making reasons such as processing and raw material, the multiple fertilizer of these pure secondary processing exists in various degree all that technology is loaded down with trivial details, investment is big, energy consumption is high, the nutrient loss is serious and problem such as processing technology thereof is unreasonable.And with urea industry produce intermediates---molten urea solution is produced granular urea technology, as number of patent application be 90105116 and the patent No. be 86106555 patents of invention, though be that the world Fertilizer field application nineties has breakthrough modern technique most, but also still just changed the simple substance fertilizer of shape size, and also must add additives such as formaldehyde, Tai-Ace S 150 in making, the crystallization of retardance melt; Moreover, in the granular urea product Biuret Content up to more than 0.8%, and still to concentrate in manufacturing processed, drying, remove the moisture in raw material or the product, consumes energy, returning charge is than high.Just because of itself there are above-mentioned defective in granular urea and technology, its use range and economic benefit have been limited greatly.
The objective of the invention is to: provide a kind of with industrial production urea NH
4(liquid) and CO
2(liquid) synthesizes high-temperature fusion urine that makes or the molten urea solution that the solid urea heating is made, and is mixed with to contain N, K
2The melting charge slurry of O is directly produced the method for urea-base compound fertilizer.
As everyone knows, prove according to theory and practice that urea and sylvite can generate a kind of low melting point double salt after mixing, this double salt both can provide growth required macronutrient N and K to plant
2O can be used as chemical fertilizer, mineral manure, organic fertilizer again and is " binding agent " of the mixture granulation of component with them.
Macrobead NK urea-base compound fertilizer of the present invention and NPK element urea-base compound fertilizer are exactly that the urine of utilizing molten urea solution that industrial production urea makes or urea heating to make is mixed generation N, K with sylvite
2The chemical property of O low melting point double salt makes.
Promptly at industrial production urea NH
4(liquid) and CO
2(liquid) synthetic urea content that makes is the molten urea solution of 70-99%, or solid particulate urea heating made the identical molten urea solution of above-mentioned concentration, by urea and sylvite is 10: the weight ratio of 1-4 is mixed with under 100 ℃ of-120 ℃ of temperature condition and contains N 32-45%, K
2O 6-24% and moisture content are the fused salt of 2-3%, also are called melting charge slurry.Again its atomizing is the droplet of 80-100 μ m, be sprayed at fineness and be material that 100-150 order zeolite powder and solid particulate urea forms or organic phosphatic fertiliser, potash fertilizer or be on the powder of component after the granulation with them, through forcing cooling, screening, metering packing, making granularity respectively is 2-8mm, N+K again
2O is 35-50% or 1-4.75mm, N+P
2O
5+ K
2The O total nutrient is 25-45%, and moisture content is at macrobead NK urine-base compound fertilizer or the NPK element urine-base compound fertilizer of 1.5-2.0%.
The particle of 2-4mm is applicable to the material fertilizer of special-purpose fertilizer and BB fertilizer in the NK urea-base compound fertilizer of producing by the inventive method, and 4-8mm can be used for broadcasting sowing or rice terrace deep placement base fertilizer of forest, grassland.Because N-O-K of the present invention
2O and UNPK urine-base compound fertilizer are to adopt fertilizer fused salt spray granulating to form, so its particle is mellow and full smooth, and intensity is up to more than the 16N, not only can with other granulated fertilizer blending, also be applicable in bulk and storage, percentage of damage reduces more than 95% than the multiple fertilizer that other secondary processing becomes.Owing to used clinoptilolite in this urine-base compound fertilizer with big adsorptive power and ion-exchange capacity, not only make fertilizer have slow release effect, various trace elements also is provided, but also the utilization ratio of nitrogen can have been improved 15-20%.The urine-base compound fertilizer that this law is produced is directly to utilize the industrial production urea synthesis to obtain the molten urea solution that contains urea 70-99% to make, thereby simplified fertilize preparation craft, save facility investment, and has significantly energy-conservation, consumption reduction effect, can make multiple fertile production cost reduce 10-15%, and solve the volatilization loss of chemical fertilizer secondary processing urine-base compound fertilizer N rationally and effectively and glued the Technology difficult problem that wall, accumulation, bridging etc. make long-term puzzlement people such as production has some setbacks, productive rate is low.
The present invention will be further described below in conjunction with embodiment, and following embodiment is not the restriction to protection scope of the present invention.
Embodiment 1: the employing urea concentration is 95% molten urea solution, produces N-O-K
2O is 35-0-5, and total nutrient is 40% macrobead NK urea-base compound fertilizer.
Raw material and the consumption of producing this composite fertilizer's use are as follows:
Material name consumption (kilogram) 95% urine 342.0 solid ureas 432.0 Repone K 83.5 zeolite powders 206.0
With the concentration of molten state is 95%, and temperature is the urine about 145 ℃, through urine volume pump automatic gauge, sends in the reactor, after Repone K mixes by 10: 2.07 weight ratio, makes 110 ℃ and contains N, K
2The slip of O again before feeding pump is delivered to granulating disc, is the fine mist of 100 μ m through the rotary nozzle atomizing, and being sprayed at by 67.71% granular urea and 32.29% fineness is granulation on the dry material formed of 100 order zeolite powders.Material constantly rotates with the rotation of granulating disc; through spray repeatedly, bonding, crystallization make in the dry material solid particulate urea particle parcel grow up to be 2-8mm macrobead; enter the rotating cylinder cooler through lifting and force cooling; make its temperature reduce to normal temperature below 30 ℃; screening, metering packing more just make and contain that N is 35%, K
2O is 5% macrobead NK urea-base compound fertilizer, and the finished product Biuret Content is lower than 0.5%.Particulate and oversize granule less than 2mm together return granulating system after crushed.The ammonia of overflowing during the prepared in reaction slip reclaims through washing, and its concentration reaches 40% can return carbamide production system, the emptying after the dedusting recovery is up to standard of the waste gas of process of cooling generation simultaneously.
Comparable other nitrogenous fertilizer of the utilization ratio of the N of macrobead NK composite fertilizer improves 18%, and production cost can reduce by 14%, and can be widely used in broadcasting sowing and paddy rice base manure deep placement of forest, grassland, can play the effect that reduces input, increasing both production and income to farming, animal husbandry.
Embodiment 2: the employing urea concentration is 95% molten urea solution, and production N-P-K is 15-15-15, and total nutrient is 45% NPK urea-base compound fertilizer.
Raw material and the consumption of producing this composite fertilizer's use are as follows:
Material name consumption (kilogram)
Concentration is 95% molten urea solution 343.0
Partially acidulated rock phosphate 326.0
Repone K 251.0
Zeolite powder 80.0
With concentration is 95%, and temperature is 145 ℃ a molten urea solution, through 343 kilograms of urine volume pump automatic gauges, send in the reactor, with the weight ratio of Repone K, after promptly 37.0 kilograms of Repone K mix by 10: 1.14, be prepared under 105 ℃ of conditions that to contain N be 150 weight parts, K
2O is the melting charge slurry of 22.0 weight parts; deliver on the granulating disc with feeding pump; through the rotary nozzle atomizing is the fine mist of 80 μ m; be sprayed at by 326 parts of partially acidulated rock phosphates; 214 parts in Repone K; granulating bonds on the powder of 80 parts of compositions of zeolite powder; the moving spraying of not stall; bond layer by layer; grow up to qualified particle gradually; automatically overflow outside the dish; enter the rotating cylinder cooler through lifting and force cooling; remaining operation is with embodiment 1; just make that to contain N be 15%; containing P is 15%; containing K is 15%, and total nutrient is 45% particle NPK urea-base compound fertilizer, and the utilization ratio of its N can improve 12% than other composite fertilizer and urea; and reduce production costs 10%, can be widely used in the special-purpose fertile and production BB fertilizer that is mixed.
Claims (3)
1. one kind is the method for feedstock production urea-base compound fertilizer with the molten urea solution, wherein said molten urea solution is that concentration is being made by industrial production urea of 70-99%, or make by the solid urea heating, it is characterized in that with urea in the molten urea solution and sylvite by 10: the weight ratio of 1-4 is mixed with under 100 ℃ of-120 ℃ of temperature condition and contains N, K
2The melting charge slurry of O, again with its atomizing, be sprayed onto granulation on the material of forming by granular urea and zeolite powder or phosphate fertilizer, potash fertilizer, zeolite powder,, just made macrobead NK urine-base compound fertilizer or NPK element urine-base compound fertilizer respectively again with its cooling, screening, metering packing.
2. according to claim 1 is the method for feedstock production urea-base compound fertilizer with the molten urea solution, and wherein said macrobead NK urine-base compound fertilizer grain graininess is φ 2-8mm, and N, K total nutrient content are 35-50%, and moisture content is 1.5-2.0%.
3. according to claim 1 is the method for feedstock production urea-base compound fertilizer with the molten urea solution, and the phosphate fertilizer in the wherein said NPK element urine-base compound fertilizer can be partially acidulated rock phosphate; Multiple fertile mesolite powder content is 8%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98111778A CN1083815C (en) | 1998-12-30 | 1998-12-30 | Method for prodcing high effective ureido compound fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98111778A CN1083815C (en) | 1998-12-30 | 1998-12-30 | Method for prodcing high effective ureido compound fertilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1221716A CN1221716A (en) | 1999-07-07 |
| CN1083815C true CN1083815C (en) | 2002-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98111778A Expired - Fee Related CN1083815C (en) | 1998-12-30 | 1998-12-30 | Method for prodcing high effective ureido compound fertilizer |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100363307C (en) * | 2005-12-22 | 2008-01-23 | 陕西巨川富万钾股份有限公司 | Organic potassium fertilizer containing urea |
| CN110105134A (en) * | 2019-04-30 | 2019-08-09 | 宜昌阿波罗肥业有限公司 | A kind of compound fertilizer production technology |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1158831A (en) * | 1997-03-07 | 1997-09-10 | 王长山 | Production process of composite urine fertilizer |
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- 1998-12-30 CN CN98111778A patent/CN1083815C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1158831A (en) * | 1997-03-07 | 1997-09-10 | 王长山 | Production process of composite urine fertilizer |
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| CN1221716A (en) | 1999-07-07 |
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Granted publication date: 20020501 Termination date: 20101230 |