CN1206190C - Method for producing urine basis organic-inorganic compound fertilizer - Google Patents
Method for producing urine basis organic-inorganic compound fertilizer Download PDFInfo
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- CN1206190C CN1206190C CN 02112070 CN02112070A CN1206190C CN 1206190 C CN1206190 C CN 1206190C CN 02112070 CN02112070 CN 02112070 CN 02112070 A CN02112070 A CN 02112070A CN 1206190 C CN1206190 C CN 1206190C
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Abstract
The present invention relates to a production method of urine basis organic-inorganic compound fertilizer. The present invention has the method that urea and ammonium phosphate are mixed to form concentrated fertilizer material pulp; the concentrated fertilizer material pulp is sprinkled on preset organic material and/or solid fertilizer in a granulating machine to carry out granulation for the first time; afterwards, all the materials are sent to the granulating machine of a rotary drum, or a disc granulating machine to carry out the granulation for the second time to obtain the urine basis organic-inorganic compound fertilizer. The method can directly adopt urine liquid of a urea production plant and concentrated solution of ammonium phosphate of an ammonium phosphate production plant to be mixed with granular solid material to carry out the granulation for twice; the present invention has the advantage of full utilization of the heat amount of the material pulp, high granulation temperature, improved balling rate of 95% from 60%, no need of drying, productivity increase and production cost reduction; the organic waste in a city is utilized to make the nutrient structure of the compound fertilizer more reasonable and to lighten the pressure of environmental protection of the city, and the present invention has certain social benefit.
Description
Affiliated technical field
The present invention relates to a kind of production method of granular complex fertilizer, relate to a kind of production method of organic-inorganic complex fertilizer or rather.
Background technology
Solid material production is mainly adopted in the production of existing composite fertilizer; send into rotary drum granulator or granulating disc after the basic material mixing with nitrogenous, phosphorus, potassium exactly; material is agglomerated into spheroidal particle in tablets press; material after the granulation is delivered directly to drying kiln for drying, promptly gets qualified product through the exsiccant material through cooling, screening.This technology production process is simple, and operation is easy to grasp, but required moisture height when having the material granulating, drying load is big, the defective that granule strength is not high.In addition, prilling temperature is low, generally at 20～40 ℃, is unsuitable for the production of the composite fertilizer of nitrogen content height (as nitrogen content more than 20%).
Chinese patent application CN1307550A discloses a kind of preparation method of compound fertilizer granules; this method is that the fertile raw material of 10～40% solid is melted in melting tank; then melting charge is introduced granulation in the tablets press, whole granulation process no longer adds entry or aqueous solution, does not use drying means.But this method mainly is to adhere to other inorganic salt powder granulating after relying on urea melting, is unsuitable for the production of fertilizer.
Chinese patent CN1048707C discloses the production method of a kind of molten urea solution coproduction composite fertilizer, this method mainly is to utilize urea and Repone K to form the eutectoid point slip, be sprayed on granulation on powders such as the organic phosphatic fertiliser that humic acid activation treatment ground phosphate rock makes, general calcium, sylvite then, make the NPK compound fertilizer that can contain organic phosphate fertilizer.But this method also is only applicable to organic phosphatic fertiliser, also exists granule strength not high, the defective that balling ratio is not high.
" chemical fertilizer industry " the 26th the 1st phase of volume has been introduced a kind of method of melting method antidiuresis base azophoska compound fertilizer, and this method is to utilize the urea soln of one section of urea plant or dual circulation (concentration 〉=95%) and phosphorus ammonium and Repone K melting mixing, adopts the sprinkling pelleting method.But this method exists prilling spry easily to stop up, and needs problems such as often cleaning.
The employing urea slip of going into operation in nearly 2 years is made the composite fertilizer production line, mostly to produce inorganic complex fertilizer, produce organic-inorganic complex fertilizer seldom, and there is the defective that balling ratio is not high, the returning charge amount is big behind the introducing organic materials, product also needs further dry, has improved production cost.
Summary of the invention
The production method that the purpose of this invention is to provide a kind of urine basis organic-inorganic compound fertilizer, this method can directly adopt the urine of factory that makes urea and the phosphorus ammonium concentrated solution and the granular solids mixing of materials of phosphorus ammonium factory to carry out twice granulation, granulating rate significantly improves, the returning charge amount significantly reduces, increase throughput, reduced production cost.
The ultimate principle of the inventive method is: easily flow according to the urea slip; the characteristics that phosphor ammonium slurry viscosity is high; with the two formation good fluidity that unites two into one; the extra quality slurry that cohesiveness is strong; this slip is sprayed onto on the mixture of organic raw material in the biaxial granulation machine and part inorganic raw material by pump or pressurizing device; mixing and preliminary granulation through the biaxial granulation machine; the oarse-grained fragmentation of simultaneous; the plasticity of mixture improves; the formation certain particle distributes; the material that goes out the biaxial granulation machine advances rotary drum granulator or further round as a ball and compacting of granulating disc again, has formed the slick granulated product of rounding.
The production method of a kind of urine basis organic-inorganic compound fertilizer of the present invention is to realize like this.Method of the present invention comprises the steps: that urea mixes into the concentrated fertilizer slip with the phosphorus ammonium; be sprayed on the organic materials that preset in the tablets press and/or the solid fertilizer and carry out a granulation; then all materials are sent into and carried out secondary granulation in rotary drum granulator or the granulating disc, obtain urine basis organic-inorganic compound fertilizer.
Existing thin material slurry is produced in the process of composite fertilizer, needs extra steam or the water of replenishing, and can't improve prilling temperature, and material needs drying after the granulation.Moreover dry need very high temperature and suitable humidity, and high temperature can cause the fusion of material and be stained with on the inwall and scraper plate of moisture eliminator, humidity is crossed ambassador's material and be can not get good drying.The extra quality sizing process of the production composite fertilizer of having reported is same introduces steam or water owing to finally necessary, thereby also just needs drying.
In addition, behind the adding organic materials, because the free-running property of organic materials itself makes that balling ratio descends in granulation process, returning charge increases, and has influenced the throughput of device.The inventor finds that through a large amount of test the extra quality sizing process of the inventive method adopts twice agglomeration technique then can obviously improve the balling ratio of granulation, and applicable to the production of the composite fertilizer of different proportionings.
The urea soln that method of the present invention adopts is that temperature is 100～140 ℃ a urea soln in the urea production process, or solid urea is heated to 100～130 ℃ urea slip, and its concentration is 80～99.7wt%.The concentration of phosphorus ammonium enriching slurry is 75～90wt%, and described phosphorus ammonium can be monoammonium phosphate or diammonium phosphate.
The concentration of described urea and phosphorus ammonium mixed fertilizer slip is 80～98wt%, and preferred concentration is 90～95wt%.The weight ratio of described urea and phosphorus ammonium is 0.2～5: 1, and preferred ratio is 0.5～2: 1.
The add-on of described urea ammonium phosphate mixed slurry is 30～60wt%, preferably 40～50wt%.
Do not need restock water during method granulation of the present invention, thereby alleviated the manipulation strength of postorder drying process, reduced energy consumption.
The temperature of a described granulation is 60～90 ℃, preferably 70～80 ℃; The temperature of secondary granulation is 55～80 ℃, preferably 60～65 ℃.A described granulation is to carry out in the biaxial granulation machine.
Described organic materials is optional one or more mixture in municipal wastes, fowl and animal excrement, humic acid, sugared slag, the peat composed of rotten mosses, monosodium glutamate tankage, crop stalk.
Described solid fertilizer is optional from solid nitrogen, phosphorus, potassic fertilizer and middle amount, trace element fertilizer, as urea, ammonium nitrate, ammonium chloride, saltpetre, general calcium, coarse whiting, phosphorus ammonium, Repone K, vitriolate of tartar etc.Trace element fertilizer can be the compound that contains boron, iron, copper, zinc, manganese, molybdenum, silicon etc.
Method of the present invention also can be added the proportioning that solid filler is regulated composite fertilizer npk nutrient content when granulation.Solid filler is optional one or more mixture in wilkinite, kaolin, calcite in powder, terra alba.
Organic materials and solid fertilizer need carry out pre-treatment among the present invention, and temperature of charge is 50～80 ℃ after the pre-treatment, are preferably 60～70 ℃, granularity＜2mm, preferably＜0.5mm.
Fertilizer after the granulation is through screening, and packing is the organic-inorganic complex fertilizer product.Large-particle fertilizer process fragmentation after the screening and small-particle and finely powdered fertilizer are sent into granulation in the tablets press more together as returning charge.
The present invention compared with prior art has following advantage:
1, the production method of urine basis organic-inorganic compound fertilizer of the present invention adopts the technology of extra quality slurry, twice granulation, no longer introduce water in the production process, make full use of the heat of fertilizer slurry, the prilling temperature height, the balling ratio height, balling ratio can bring up to 95% by 60%, drying-free, get rid of the very high dehumidification system of investment and process cost, reduced energy consumption, saved investment and production cost.
2, method of the present invention can utilize factory that makes urea and phosphorus ammonium factory intermediates urine and phosphorus ammonium concentrated solution, the direct production organic-inorganic complex fertilizer, saved the expense such as granulation, packing, transportation of urea, phosphorus ammonium concentrated solution, operation such as fragmentation again when also having saved urea, phosphorus ammonium system composite fertilizer, new production technique for fertilizer is more rationally easy.
3, method of the present invention adds organic matter in inorganic fertilizer, can make full use of existing organic waste, as feces of livestock and poultry and municipal wastes etc., alleviates the environmental protection pressure in city, has the certain social benefit.The soil compaction phenomenon that also can avoid the life-time service inorganic fertilizer to cause, and make the nutrient structure of composite fertilizer reasonable more fully.
4, it is too high that method of the present invention has overcome in the melt tower granulation technology prilling tower, the susceptible to plugging defective of prilling spry.
Embodiment
Further set forth the present invention below by detailed description, but embodiment not a limitation of the present invention to the specific embodiment of the invention.
Embodiment 1:
Get 20 kilograms of urea plant flash evaporator outlet urea soln or solutions; concentration is greater than 85%; about 130 ℃ of temperature; add granularity less than 33 kilograms of 0.5 millimeter monoammonium phosphates; mixed about 2 minutes; 100～120 ℃ of slurry temperatures; the urine phosphor ammonium slurry that forms arrives biaxial granulation machine and pretreated 35 kilograms of municipal wastess and 16 kilograms of mixing granulations of Repone K by pump delivery; be transported in the rotary drum granulator again through preliminary granulated material; material behind the secondary granulation is the high-concentration granular urine-base organic-inorganic complex fertilizer through cooling; this product contains N12%, P
2O
514%, K
2O 10%, moisture 1.5%, and the granule strength of product is greater than 20 newton/grains.
Embodiment 2:
Get 27 kilograms of the enriching slurries of monoammonium phosphate factory; concentration about 80%; about 120 ℃ of temperature; add granularity less than 2.0 millimeters 15 kilograms of solid ureas and granularity less than 16 kilograms in 0.5 millimeter Repone K; mixed about 4 minutes; about 100～120 ℃ of slurry temperature; slip is by being pressed and delivered in the biaxial granulation machine; 50 kilograms of treated fowl and animal excrements are as the returning charge mixing granulation; material after the granulation is sent into granulating disc again; concentration was urinated basic NPK compound fertilizer product during material behind secondary granulation cooled off and promptly obtains, and this product specification is N-P
2O
5-K
2O=10-10-10, moisture content is 2.0%.The granule strength of product is greater than 15 newton/grains.
Embodiment 3:
Solid urea adds water for 27 kilograms and forms the urine slip and be pre-mixed for 33 kilograms with the diammonium phosphate of granularity less than 0.5 millimeter for 3 kilograms; be heated to about 120 ℃ jointly and become molten slurry; this slip arrives the biaxial granulation machine by pump delivery; granularity is done returning charge for 15 kilograms less than 25 kilograms in the 0.5 millimeter Repone K and the peat composed of rotten mosses; thing grain behind the mixing granulation is delivered in the rotary drum granulator again; get high density and urinate basic NPK compound fertilizer product, this product specification is N-P
2O
5-K
2O=15-15-15, moisture content is 1.0%, granule strength is greater than 30 newton/grains.
Embodiment 4:
Get 42 kilograms of urea plant flash evaporator outlet urea slips; concentration is greater than 95%; about 130 ℃ of temperature is got 25 kilograms of the enriching slurries of ammonium phosphate plant, concentration about 80% again; about 120 ℃ of temperature; spray into the biaxial granulation machine simultaneously, granularity is done returning charge for 20 kilograms less than 20 kilograms of 1.0 millimeters vitriolate of tartar and humic acid, and coating granulation is sent into granulating disc; get high density and urinate basic NPK compound fertilizer product, this product specification is N-P
2O
5-K
2O=20-10-10, moisture 1.5%, granule strength is greater than 30 newton/grains.
Embodiment 5:
Solid urea adds 10 kg water formation urine slip for 17 kilograms and mixes for 23 kilograms with the monoammonium phosphate of granularity less than 0.5 millimeter; the mixed slurry that formation temperature is about 120 ℃; this slip arrives the biaxial granulation machine by pump delivery; granularity is done returning charge for 44 kilograms less than 16 kilograms of 0.5 millimeter vitriolate of tartar and monosodium glutamate tankage; material behind the mixing granulation is delivered in the rotary drum granulator again; get lower concentration organic-inorganic complex fertilizer product, this product specification is N-P
2O
5-K
2O=13-10-7, moisture content is 3.0%, granule strength is greater than 10 newton/grains.
Embodiment 6:
Get 25 kilograms of urea plant flash evaporator outlet urea slips; concentration 99.7%; about 140 ℃ of temperature is got 6 kilograms of the enriching slurries of ammonium phosphate plant, concentration about 90% again; about 120 ℃ of temperature; spray into the biaxial granulation machine simultaneously, granularity is done returning charge for 14 kilograms less than 0.5 millimeter micro-borax 20 grams, zinc sulfate 30 grams and 46 kilograms of soya-bean cakes, 10 kilograms of coarse whitings, vitriolate of tartar, sends into rotary drum granulator after the granulation; obtain lower concentration organic-inorganic complex fertilizer product, this product specification is N-P
2O
5-K
2O=12-6-7, moisture 3.5%, granule strength is greater than 8 newton/grains.
Embodiment 7:
Get 45 kilograms of urea plant flash evaporator outlet urea slips; concentration is greater than 95%; about 130 ℃ of temperature is got 20 kilograms of the enriching slurries of ammonium phosphate plant, concentration about 85% again; about 125 ℃ of temperature; spray into the biaxial granulation machine simultaneously, granularity is done returning charge for 20 kilograms less than 20 kilograms in 1.0 millimeters saltpetre and humic acid, and coating granulation is sent into granulating disc; obtain high density organic-inorganic complex fertilizer product, this product specification is N-P
2O
5-K
2O=23-8-9, moisture 1.0%, granule strength is greater than 30 newton/grains.
Claims (8)
1; a kind of production method of urine basis organic-inorganic compound fertilizer; it is characterized in that this method comprises the steps: that concentration is that urea soln and the concentration of 80～99.7wt% is that the phosphorus ammonium enriching slurry of 75～90wt% mixes into the concentrated fertilizer slip; the weight ratio of urea and phosphorus ammonium is 0.2～5: 1; the concentration of mixing back concentrated fertilizer slip is 80～98wt%; slip is sprayed on the organic materials that preset in the biaxial granulation machine and/or the solid fertilizer and carries out a granulation; the add-on of slip is 30～60wt%; one time prilling temperature is 60～90 ℃; organic materials is optional from municipal wastes; fowl and animal excrement; humic acid; the sugar slag; the peat composed of rotten mosses; the monosodium glutamate tankage; the mixture of one or more in the crop stalk; solid fertilizer is optional from solid nitrogen; phosphorus; potassic fertilizer and trace element fertilizer; then all materials are sent into and carried out secondary granulation in rotary drum granulator or the granulating disc; the secondary granulation temperature is 55～80 ℃, obtains urine basis organic-inorganic compound fertilizer.
2, the method for claim 1 it is characterized in that described urea is that temperature is 100～140 ℃ a urea soln in the urea production process, or solid urea is heated to 100～130 ℃ urea slip.
3, the method for claim 1, the concentration that it is characterized in that described concentrated fertilizer slip is 90～95wt%.
4, the method for claim 1 is characterized in that the weight ratio of described urea and phosphorus ammonium is 0.5～2: 1.
5, the method for claim 1, the add-on that it is characterized in that described urea ammonium phosphate mixed slurry is 40～50wt%.
6, the method for claim 1, the temperature that it is characterized in that a described granulation are 70～80 ℃, and the temperature of secondary granulation is 60～65 ℃.
7, the method for claim 1 is characterized in that when granulation, can add the nutrient content that solid filler is regulated fertilizer.
8, method as claimed in claim 7 is characterized in that described solid filler is optional one or more mixture in wilkinite, kaolin, calcite in powder, terra alba.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02112070 CN1206190C (en) | 2002-06-14 | 2002-06-14 | Method for producing urine basis organic-inorganic compound fertilizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02112070 CN1206190C (en) | 2002-06-14 | 2002-06-14 | Method for producing urine basis organic-inorganic compound fertilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1465551A CN1465551A (en) | 2004-01-07 |
| CN1206190C true CN1206190C (en) | 2005-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02112070 Expired - Fee Related CN1206190C (en) | 2002-06-14 | 2002-06-14 | Method for producing urine basis organic-inorganic compound fertilizer |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948349B (en) * | 2010-08-11 | 2012-10-17 | 西北农林科技大学 | Preparation process for organic-inorganic compound fertilizer |
| CN102850124B (en) * | 2012-09-04 | 2015-03-04 | 深圳市芭田生态工程股份有限公司 | Sulphate-potassium magnesium fertilizer and preparation method thereof |
| CN104072260B (en) * | 2014-05-29 | 2016-06-22 | 苏州上研化肥科技发展有限公司 | A kind of production system producing compound fertilizer |
| CN104402654A (en) * | 2014-11-21 | 2015-03-11 | 苏州市吴中区光福香雪苗圃 | Mixed type mineral fertilizer |
| CN112851440A (en) * | 2019-11-12 | 2021-05-28 | 中国科学院过程工程研究所 | Preparation method of environment-friendly organic-inorganic compound fertilizer |
| CN115124381A (en) * | 2022-06-16 | 2022-09-30 | 国投新疆罗布泊钾盐有限责任公司 | Round-particle potassium sulfate composite material and preparation method and application thereof |
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2002
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Granted publication date: 20050615 Termination date: 20160614 |