CN103951508A - Molecular network type nano-coating efficient slow release organic fertilizer and production process thereof - Google Patents
Molecular network type nano-coating efficient slow release organic fertilizer and production process thereof Download PDFInfo
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Abstract
The invention provides a molecular network type nano-coating efficient slow release organic fertilizer and a production process thereof. The molecular network type nano-coated efficient slow release organic fertilizer consists of molecular network type slow release fertilizer particles and a nano-coating agent. The fertilizer provided by the invention has the advantages that the nano-coating material can be degraded, the nutrients are promoted to be absorbed by crops through a nano small size effect, and the problem on environment pollution caused by the fertilize is solved; an anti-blocking primary moulding efficient prilling system is designed to lower the production cost of the fertilizer and improve the production efficiency; a multilayered vibrating steam circular drying process is developed and the system is monitored through a humidity sensor, fertilizer particles conveyed downward through a vibrating plate layer by layer are thorough to dry and long in expiration date and the drying process is simple and convenient, and the input cost is lowered by 10%; a cleaning and recovering system for prilling tail gas of the fertilizer prevents ammonia gas in the tail gas from overflowing, thereby facilitating resource saving and environmental protection.
Description
Technical field
The present invention relates to organic fertilizer production technical field, be specifically related to a kind of molecular network nanometer coated slow-release fertilizer.
Background technology
At present, fertilizer industry is faced with a persistence challenge that how to improve its product efficiency: or by improving fertilizer in use, or realize this purpose by the exploitation of new special fertilizer type.To the such country that ecological pressure is huge of China, especially need so.The reasonable input of chemical fertilizer is that the important substance that improves modern agricultural production power guarantees, and sustained-controll-release fertiliser not only can effectively improve utilization rate of fertilizer, and can alleviate fertilizer pollution on the environment.Therefore, efficient, the environmental protection of development, novel sustained-controll-release fertiliser is the vital task of current fertilizer scientific and technical innovation cheaply.
Summary of the invention
The deficiency existing for above-mentioned prior art, the object of this invention is to provide a kind of current development trend that meets, efficiently, molecular network nanometer coated slow-release fertilizer and production technique thereof cheaply.
Technical scheme of the present invention is: molecular network nanometer coated slow-release fertilizer, by molecular network type slow-release fertilizer particle, the agent of nanometer coating, formed, described molecular network type slow release fertilizer is by powdery instantly-soluble nitrogenous fertilizer, phosphate fertilizer, potash fertilizer and molecular network type sustained release dosage are mixed with and are formed, and molecular network type sustained release dosage be natural micro--the brilliant and natural macromolecular material chitosan of nano mineral materials Attapulgite carries out the composite rear formation of physics and chemistry modification; Described nanometer coating agent adopts kaolin, polynite-polyester mixed polymer to be prepared from; Described molecular network type slow-release fertilizer particle is wrapped in the agent of nanometer coating.
Molecular network nanometer coated slow-release fertilizer, its preparation method comprises following process:
(1) prepare molecular network type sustained release dosage: natural micro-nano mineral material Attapulgite is the brilliant and cementing slow-release material of a kind of nanometer that natural macromolecular material chitosan carries out the composite rear formation of physics and chemistry modification, i.e. molecular network type sustained release dosage;
(2) prepare molecular network type slow release fertilizer: evenly add in proportion molecular network type sustained release dosage in batching and mixed processes, make itself and fertilizer powder or melt fully be uniformly mixed, spread blend, then through the efficient tablets press compacting of anti-clogging plug once shaped granulation, finally form a kind of molecular network type slowly-releasing organic fertilizer particles with fast slow, control mistake function;
(3) by tail gas cleaning system, realize the clean recovery of granulation of fertilizer tail gas;
(4) prepare the agent of nanometer coating: first by levigate, to being less than the kaolin of 0.043 mm (approximately 300 order) or polynite and water, make the suspension that mass ratio is l:1.5, with rare KOH solution, regulate suspension to alkalescence, be placed in emulsify at a high speed decollator, with 3000～5000 r/min, stir 1 h, place 24 h and obtain kaolin, montmorillonite suspension liquid; Then under agitation condition, add dilute hydrochloric acid or dilute sulphuric acid, regulate pH to 7 left and right, then suspension is placed in to emulsify at a high speed decollator again and stirs 5～10 min, obtain nano suspending liquid; The Sodium dodecylbenzene sulfonate that is 20% by massfraction adds in unsaturated polyester resins for general purpose 306, add-on is 25% one 30% of resin quality, stirs and is placed in emulsify at a high speed decollator, adds equal-volume water, with 30000 r/min, stir 10 min, obtain nanometer unsaturated polyester liquid; Above-mentioned nano kaoline, montmorillonite-based nano suspension are mixed with nanometer unsaturated polyester liquid, volume ratio is (5～10): 1, two kinds of solution are placed in emulsify at a high speed decollator, with 30000 r/min, stir 20 min left and right and make heterogeneous nano kaoline, the mixed polywater solution of polynite one polyester, be the agent of nanometer coating;
(5) agent of nanometer coating is wrapped in molecular network type slow-release fertilizer particle surface: the aqueous solution that is .01%～1% to kaolin, polynite massfraction by nanometer coating dilution agent; solution after dilution is sprayed to granulation in disk or rotary drum granulator by high pressure spray nozzle; the every aqueous solution 50～70 kg after dilution for 1000 kg granular fertilizers; finally, with talcum powder face powder, adopt multi-layer vibration formula steam cycle drying plant dry.
The efficient tablets press of described anti-clogging plug once shaped comprises connected successively material mixing stirrer, filter, shears and compacting tablets press.
Described tail gas cleaning system comprise circulating absorption tower still, absorption tower, filler, recycle pump A, closed baffling settling vessel, baffle, adverse current baffle plate, squirt pump, water circulating pump B, ammonia salify fixed reactor, recycle-water storage tank, mud feed bin and filter press system.
Described multi-layer vibration formula steam cycle drying plant, comprise cylindrical shell, described cylindrical shell top one side is provided with feeding mouth, inner barrel is interval with many group oscillating plate I and many group oscillating plate II, on oscillating plate, be also provided with protruding block, cylinder body bottom one side is provided with steam cycle entrance, and top is provided with steam cycle outlet, and inner barrel is also provided with humidity sensor.
Advantage of the present invention is: degradable nano coated fertilizer, promotes that by nanometer small-size effect nutrient is absorbed by crops, and solved the problem of environmental pollution that fertilizer causes; The efficient granulating system of design anti-clogging plug once shaped, reduces fertiliser production cost, enhances productivity; Exploitation multi-layer vibration formula steam cycle drying process, and by humidity sensor, system is monitored, fertiliser granulates is successively carried downwards by oscillating plate, dry thorough, long quality-guarantee period, and drying process is simple and convenient, and input cost reduces by 10%; The clean recovery and processing system of granulation of fertilizer tail gas, avoids the ammonia in tail gas to overflow, and is conducive to resources conservation and environment protection.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Fig. 2 is the efficient tablets press schematic diagram of anti-clogging plug once shaped of the present invention.
Fig. 3 is the clean recovery system structural representation of tail gas of the present invention.
Fig. 4 is multi-layer vibration formula steam cycle drying equipment structure schematic diagram of the present invention.
Embodiment
Now in conjunction with specific embodiments, the present invention is further described.
Embodiment: molecular network nanometer coated slow-release fertilizer, molecular network type slow-release fertilizer particle, the agent of nanometer coating, described molecular network type slow release fertilizer is by powdery instantly-soluble nitrogenous fertilizer, phosphate fertilizer, potash fertilizer and molecular network type sustained release dosage are mixed with and are formed, and molecular network type sustained release dosage be natural micro--the brilliant and natural macromolecular material chitosan of nano mineral materials Attapulgite carries out the composite rear formation of physics and chemistry modification; Described nanometer coating agent adopts kaolin, polynite-polyester mixed polymer to be prepared from; Described molecular network type slow-release fertilizer particle is wrapped in the agent of nanometer coating.
Above-mentioned molecular network nanometer coated slow-release fertilizer, its preparation method is as follows:
1, prepare molecular network type sustained release dosage: natural micro-nano mineral material Attapulgite is the brilliant and cementing slow-release material of a kind of nanometer that natural macromolecular material chitosan carries out the composite rear formation of physics and chemistry modification, i.e. molecular network type sustained release dosage;
2, prepare molecular network type slow release fertilizer: evenly add in proportion molecular network type sustained release dosage in batching and mixed processes, make itself and fertilizer powder or melt fully be uniformly mixed, spread blend, then through the efficient tablets press compacting of anti-clogging plug once shaped granulation, finally form a kind of molecular network type slowly-releasing organic fertilizer particles with fast slow, control mistake function;
3, by tail gas cleaning system, realize the clean recovery of granulation of fertilizer tail gas;
4, preparation nanometer coating agent: first make to being less than the kaolin of 0.043 mm (approximately 300 order) or polynite and water the suspension that mass ratio is l:1.5 by levigate, with rare KOH solution, regulate suspension to alkalescence, be placed in emulsify at a high speed decollator, with 3000～5000 r/min, stir 1 h, place 24 h and obtain kaolin, montmorillonite suspension liquid; Then under agitation condition, add dilute hydrochloric acid or dilute sulphuric acid, regulate pH to 7 left and right, then suspension is placed in to emulsify at a high speed decollator again and stirs 5～10 min, obtain nano suspending liquid; The Sodium dodecylbenzene sulfonate that is 20% by massfraction adds in unsaturated polyester resins for general purpose 306, add-on is 25% one 30% of resin quality, stirs and is placed in emulsify at a high speed decollator, adds equal-volume water, with 30000 r/min, stir 10 min, obtain nanometer unsaturated polyester liquid; Above-mentioned nano kaoline, montmorillonite-based nano suspension are mixed with nanometer unsaturated polyester liquid, volume ratio is (5～10): 1, two kinds of solution are placed in emulsify at a high speed decollator, with 30000 r/min, stir 20 min left and right and make heterogeneous nano kaoline, the mixed polywater solution of polynite one polyester, be the agent of nanometer coating;
5, the agent of nanometer coating is wrapped in molecular network type slow-release fertilizer particle surface: the aqueous solution that is .01%～1% to kaolin, polynite massfraction by nanometer coating dilution agent; solution after dilution is sprayed to granulation in disk or rotary drum granulator by high pressure spray nozzle; the every aqueous solution 50～70 kg after dilution for 1000 kg granular fertilizers; finally, with talcum powder face powder, adopt multi-layer vibration formula steam cycle drying plant dry.
As shown in Figure 2, the efficient tablets press of anti-clogging plug once shaped comprises successively connected material mixing stirrer a, filter b, shears c and compacting tablets press d.Concrete granulation process is that raw material passes through filter b from mixing and blending machine a forms material oar, foreign material in material oar are filtered and removed, then enter shears c, by in material oar, macrobead and the unmixed good material oar of melting do not carry out high speed shear, make to expect that oar moment evenly dilutes, there is emulsifying effect simultaneously, make to expect that oar reaches production requirement.Material oar enters compacting tablets press d from opening for feed, is spread in the compacting groove of compaction band, and along with the motion of compaction band, the projection on compact wheel and compacting groove agree with, by raw material compacting.Fertilizer after compacting falls on sliding grain platform when compaction band moves down, from sliding grain platform to sliding tumbling process of plate of grain, rolls as round shaped grain shape or ellipticity, comes down in torrents and after particle outlet, gives off body.The granulating system of this project is simple in structure, easy to use, in granulation, effectively removes the impurity in material oar early stage, and material oar is evenly diluted, and avoids tablets press opening for feed to stop up, and greatly improves finished particle granulating rate.Granulation process is optimized for once shaped granulation, and granulating equipment, technique are simplified, and effectively reduces fertiliser production cost, and production efficiency improves 15%.
As shown in Figure 3, the clean recovery system of tail gas comprises dust recovery unit and washing processing unit, wherein wash processing unit and comprised again vacuum washing, the sedimentation of sealing baffling, ammonia salify is treating processes fixedly, as Figure 2-3, the 1st, circulating absorption tower still, the 2nd, absorption tower, the 3rd, filler, the 4th, recycle pump A, the 5th, closed baffling settling vessel, the 6th, baffle, the 7th, adverse current baffle plate, the 8th, squirt pump, the 9th, water circulating pump B, the 10th, ammonia salify fixed reactor, the 11st, recycle-water storage tank, the 12nd, mud feed bin, the 13rd, filter press system, the 14th, the tail gas of dust recovery unit.
The clean detailed process reclaiming of tail gas is: 1, vacuum water absorbs, in circulating absorption tower still, add tap water to the liquid level of regulation, ON cycle pump A, circulating water wash liquid pump in circulating absorption tower still is entered to the top on absorption tower, under the vacuum condition producing at squirt pump from the tail gas after the dedusting of dust recovery unit, from bottom to top flow through column plate and recirculated water washing lotion counter current contact, to in fertilizer tail gas, carry take of parsing in small dust and the technological process gas absorption that ammonia is main component in washing water, the vacuum tightness of vacuum water absorption system is between-0.03～-0.06MPa, 2, sealing baffling sedimentation, the dust absorbing in recirculated water washing lotion enters closed baffling settling vessel during to the concentration of process stipulation, and under the effect of baffle and adverse current baffle plate, baffling, adverse current sedimentation, realize solid, liquid separation, 3, ammonia salify is fixed, come the clarification washing water of self-closed type baffling settling vessel to enter ammonia salify fixed reactor, by in good time to adding pH value that aqueous hydrochloric acid controls washing water in ammonia salify fixed reactor not higher than 6.8, during nitrogen content in ammonia salify fixed reactor 0.43%～0.75%, enter recycle-water storage tank, the standby production plant of sending into is done ingredient water use, 4, press filtration, the mud of closed baffling settling vessel bottom enters mud feed bin, and after filtering by filter press system, filter cake is used as batch additives, and filtrate enters ammonia salify fixed reactor.
as shown in Figure 4,multi-layer vibration formula steam cycle drying process, utilizes equipment simple and reasonable, that drying effect is good to be dried fertiliser granulates.Cylindrical shell 15 top one sides of multi-layer vibration formula steam cycle drying plant are provided with feeding mouth 16, cylindrical shell 15 inside are provided with oscillating plate assembly, comprise many group oscillating plate I 17 and many group oscillating plate II 18, cylindrical shell 15 inside are located at interval, on oscillating plate 17,18, be also provided with protruding block 19, prevent that the too fast vibration of organic fertilizer from, to bottom, contributing to drying efficiency and effect.Cylinder, 15 bottom one sides are provided with steam cycle entrance 20, and top is provided with steam cycle outlet 21, and steam is successively dried the fertiliser granulates on oscillating plate 17,18 from bottom to top, avoids that organic fertilizer particles is heated, uneven drying is even.Cylindrical shell 15 inside are also provided with 22 pairs of systems of humidity sensor and monitor, and guarantee that fertiliser granulates uniform drying is thorough.This drying process heat utilization rate of this project development is high, and sound dry organic fertilizer particles guarantee fertilizer quality, and drying equipment structure is simple, produces input cost and reduces by 10%.
As shown in Figure 1, the technological process of production of product is: raw materials for production are after Raymond mill, enter mixing and blending machine and form material oar, evenly add in proportion molecular network type sustained release dosage in batching and mixed processes, make itself and fertilizer powder or melt fully be uniformly mixed, spread blend; Subsequently afterwards by the filter of the efficient tablets press of anti-blocking once shaped; foreign material in material oar are filtered and removed; then enter shears; by in material oar, macrobead and the unmixed good material oar of melting do not carry out high speed shear; make to expect that oar moment evenly dilutes; there is emulsifying effect simultaneously, make to expect that oar reaches production requirement.Material oar enters compacting tablets press from opening for feed, is spread in the compacting groove of compaction band, and along with the motion of compaction band, the projection on compact wheel and compacting groove agree with, by raw material compacting; Fertilizer after compacting falls on sliding grain platform when compaction band moves down, from sliding grain platform to sliding tumbling process of plate of grain, rolls as round shaped grain shape or ellipticity, comes down in torrents and after particle outlet, gives off body.Granulation waste gas is discharged into the clean recovery system of tail gas and processes, and fertiliser granulates passes grain by belt and is delivered to multi-layer vibration formula steam cycle moisture eliminator, thoroughly dry from top to bottom.By coating machine, degradable nano material is wrapped in to fertiliser granulates surface again, enters rotary drum cooler dry cooling, after sampling observation is qualified, can put in storage by air lift pump quantitative package.
Claims (5)
1. molecular network nanometer coated slow-release fertilizer, by molecular network type slow-release fertilizer particle and the agent of nanometer coating, formed, described molecular network type slow release fertilizer is by powdery instantly-soluble nitrogenous fertilizer, phosphate fertilizer, potash fertilizer and molecular network type sustained release dosage are mixed with and are formed, and molecular network type sustained release dosage be natural micro--the brilliant and natural macromolecular material chitosan of nano mineral materials Attapulgite carries out the composite rear formation of physics and chemistry modification; Described nanometer coating agent adopts kaolin, polynite-polyester mixed polymer to be prepared from; Described molecular network type slow-release fertilizer particle is wrapped in the agent of nanometer coating.
2. the preparation method of molecular network nanometer coated slow-release fertilizer as claimed in claim 1, comprises following process:
(1) prepare molecular network type sustained release dosage: natural micro-nano mineral material Attapulgite is the brilliant and cementing slow-release material of a kind of nanometer that natural macromolecular material chitosan carries out the composite rear formation of physics and chemistry modification, i.e. molecular network type sustained release dosage;
(2) prepare molecular network type slow release fertilizer: evenly add in proportion molecular network type sustained release dosage in batching and mixed processes, make itself and fertilizer powder or melt fully be uniformly mixed, spread blend, then through the efficient tablets press compacting of anti-clogging plug once shaped granulation, finally form a kind of molecular network type slowly-releasing organic fertilizer particles with fast slow, control mistake function;
(3) by tail gas cleaning system, realize the clean recovery of granulation of fertilizer tail gas;
(4) prepare the agent of nanometer coating: first by levigate, to being less than the kaolin of 0.043 mm (approximately 300 order) or polynite and water, make the suspension that mass ratio is l:1.5, with rare KOH solution, regulate suspension to alkalescence, be placed in emulsify at a high speed decollator, with 3000～5000 r/min, stir 1 h, place 24 h and obtain kaolin, montmorillonite suspension liquid; Then under agitation condition, add dilute hydrochloric acid or dilute sulphuric acid, regulate pH to 7 left and right, then suspension is placed in to emulsify at a high speed decollator again and stirs 5～10 min, obtain nano suspending liquid; The Sodium dodecylbenzene sulfonate that is 20% by massfraction adds in unsaturated polyester resins for general purpose 306, add-on is 25% one 30% of resin quality, stirs and is placed in emulsify at a high speed decollator, adds equal-volume water, with 30000 r/min, stir 10 min, obtain nanometer unsaturated polyester liquid; Above-mentioned nano kaoline, montmorillonite-based nano suspension are mixed with nanometer unsaturated polyester liquid, volume ratio is (5～10): 1, two kinds of solution are placed in emulsify at a high speed decollator, with 30000 r/min, stir 20 min left and right and make heterogeneous nano kaoline, the mixed polywater solution of polynite one polyester, be the agent of nanometer coating;
(5) agent of nanometer coating is wrapped in molecular network type slow-release fertilizer particle surface: the aqueous solution that is .01%～1% to kaolin, polynite massfraction by nanometer coating dilution agent; solution after dilution is sprayed to granulation in disk or rotary drum granulator by high pressure spray nozzle; the every aqueous solution 50～70 kg after dilution for 1000 kg granular fertilizers; finally, with talcum powder face powder, adopt multi-layer vibration formula steam cycle drying plant dry.
3. the preparation method of molecular network nanometer coated slow-release fertilizer as claimed in claim 2, is characterized in that: the efficient tablets press of described anti-clogging plug once shaped comprises connected successively material mixing stirrer, filter, shears and compacting tablets press.
4.
asthe preparation method of molecular network nanometer coated slow-release fertilizer claimed in claim 2, is characterized in that: described tail gas cleaning system comprise circulating absorption tower still, absorption tower, filler, recycle pump A, closed baffling settling vessel, baffle, adverse current baffle plate, squirt pump, water circulating pump B, ammonia salify fixed reactor, recycle-water storage tank, mud feed bin and filter press system.
5. the preparation method of molecular network nanometer coated slow-release fertilizer as claimed in claim 2, it is characterized in that: described multi-layer vibration formula steam cycle drying plant, comprise cylindrical shell, described cylindrical shell top one side is provided with feeding mouth, inner barrel is interval with many group oscillating plate I and many group oscillating plate II, is also provided with protruding block on oscillating plate, and cylinder body bottom one side is provided with steam cycle entrance, top is provided with steam cycle outlet, and inner barrel is also provided with humidity sensor.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105110997A (en) * | 2015-10-07 | 2015-12-02 | 吴朱冠宇 | Controlled release fertilizer and preparation method thereof |
| CN111868014A (en) * | 2018-02-09 | 2020-10-30 | 瑞南科技私人有限公司 | Intelligent release type nitrogenous fertilizer granule |
| CN112839732A (en) * | 2018-10-18 | 2021-05-25 | 亚拉国际有限公司 | Method for producing granules from a slurry and fluid bed granulator |
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| CN103084034A (en) * | 2013-02-02 | 2013-05-08 | 吕瑞新 | Clean treatment method of compound fertilizer granulation tail gas |
| CN103411408A (en) * | 2013-08-20 | 2013-11-27 | 庄丽强 | Organic fertilizer drying equipment |
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| CN1414033A (en) * | 2002-08-09 | 2003-04-30 | 张夫道 | Production technology of nano-clay-polyester mixed polymer fertilizer coating cementing agent |
| CN1850743A (en) * | 2006-05-18 | 2006-10-25 | 中国科学院等离子体物理研究所 | Nitrogen fertilizer solidifying method by active soil, flocculant, adsorbent composite material and fertilizer |
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| CN105110997A (en) * | 2015-10-07 | 2015-12-02 | 吴朱冠宇 | Controlled release fertilizer and preparation method thereof |
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| CN112839732A (en) * | 2018-10-18 | 2021-05-25 | 亚拉国际有限公司 | Method for producing granules from a slurry and fluid bed granulator |
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Application publication date: 20140730 |