CN102126892A - Coating slurry for slow release fertilizer and production method thereof - Google Patents
Coating slurry for slow release fertilizer and production method thereof Download PDFInfo
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- CN102126892A CN102126892A CN2011100703272A CN201110070327A CN102126892A CN 102126892 A CN102126892 A CN 102126892A CN 2011100703272 A CN2011100703272 A CN 2011100703272A CN 201110070327 A CN201110070327 A CN 201110070327A CN 102126892 A CN102126892 A CN 102126892A
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- release fertilizer
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Abstract
The invention discloses coating slurry for a slow release fertilizer and a production method thereof, relating to the technical field of production of slow release fertilizers. The method comprises the following steps of: preparing the rich rice straw resource into concentrated slurry; adding polyvinyl alcohol into the concentrated slurry; and stirring at the temperature of between 40 DEG C and 60 DEG C to obtain viscous coating slurry. In a preparation technology process, supernatant waste liquor above the concentrated slurry is fully recycled in a slurry producing process, is taken as process water for next slurry producing of rice straw and is not discharged, and 'three wastes' such as waste water, waste gas and waste solid are not discharged. The production method has a simple process, and is suitable for large-scale industrial production. A slow release coating film of the prepared biological slow release fertilizer can be fully degraded in the soil environment, so that secondary environmental pollution is avoided. The production method is suitable for preparing a biological slow release fertilizer by using inorganic fertilizers or compound fertilizers.
Description
Technical field
The invention belongs to the fertilizer industry technical field, particularly the production technical field of slow release fertilizer.
Background technology
After the people such as K.G.C1art of the U.S. in 1948 had synthesized in the world first slowly-releasing urea-formaldehyde fertilizer, the evolution of a diversification had been experienced in the research and development of slowly/controlled releasing fertilizer.Over particularly nearest more than 10 years, the slowly/controlled releasing fertilizer research direction also enlarges with application thereupon, mainly is the research to aspects such as environmental influences of organic high molecular polymer parcel decomposition course and slow release fertilizer, coating novel material, synthetic process and slowly/controlled releasing fertilizer prolonged application.
In the last few years, international and domestic release fertilizer output, consumption were mainly used in non-agricultural field and human consumer's family expenses all in steady-state growth, did not obtain than quantum jump at agriculture field, were genuine " noble's fertilizer ".China is chemical fertilizers production and uses big country, but also is not chemical fertilizers production and the power that uses.At present, global-type inflation, grain and the energy all go up, although China's grain yield realizes volume increase for years, the too fast China's grain security of still giving of means of agricultural production price increase such as chemical fertilizer has been brought hidden danger to a certain degree.Research and development slowly-releasing, release and release control fertilizer can ensure sustainable use, raising utilization rate of fertilizer, the minimizing pollution in China farmland, being development of national fertilizer industry, the needs that improve product competitiveness, also is the needs of resource-conserving and environment-friendly society.If the decline of the production prices of slow-release fertilizer, chemical fertilizer utilization ratio height, ecological availability are high and have fewer environmental impacts or minimum, then for improve chemical fertilizer utilization ratio, reduce nutrient loss, reduce labour intensity, aspects such as control pollution of area source provide the utmost point to have broad application prospects.
In the development of polymer coated fertilizer, determining and optimizing of polymer coated fertilizer slowly-releasing parameter is slow release fertilizer development and one of key issue in application technology.The polymer capsule technology mainly contains: polyolefine coating, pitch/paraffin coating, sulphur dressing, thermoplastic resin membrane wrapping.If but the polymkeric substance that life-time service is difficult to degrade certainly will bring serious environmental problem to soil as coating.Therefore, develop cheap, environmentally friendly organism slow release fertilizer, will have very important practical significance and application prospect.
Summary of the invention
The objective of the invention is to propose to have the slow-release function of fertilizer, cheap, eco-friendly slow release fertilizer coating slurry.
The present invention mainly is made up of paddy stalk and polyvinyl alcohol.
The mass ratio of described paddy stalk and polyvinyl alcohol is 8～18 ︰ 1～3.
The present invention makes full use of abundant paddy stalk resource, with paddy stalk is biological release membranes matrix, add plastics---polyvinyl alcohol, make the biological slow-released wrap film of fertilizer, develop cheap, environmentally friendly organism slow release fertilizer with good biodegradability properties energy.Present technique can be formed the slowly-releasing efficient of may command slow release fertilizer by regulating biological slow-released wrap film according to using object and requirement.
Another purpose of the present invention is to propose the production method of above slow release fertilizer coating slurry:
Earlier paddy stalk is made underflow, in underflow, add polyvinyl alcohol again, under 40～60 ℃ of ambient temperature conditions, stir into thick coating slurry.
In the preparation process of the present invention, be positioned at the above upper strata stripping water complete-reclaiming of underflow in the process of slurrying, the process water as paddy stalk slurrying does not next time efflux, and no waste water does not have waste gas, solid useless " three wastes " discharging yet.Technology is simple, is suitable for large-scale commercial production, and the slowly-releasing wrap film of the organism slow release fertilizer of preparation can be degraded in edatope fully, can not produce second environmental pollution.
The technology of the present invention highly versatile is prepared into the production of organism slow release fertilizer applicable to mineral manure (as urea, bicarbonate of ammonia etc.) or compound manure.Also can regulate the slowly-releasing efficient that biological slow-released wrap film is formed the may command slow release fertilizer according to using object and requirement.
Embodiment
Example one,
1, the 5kg paddy stalk is pulverized, placed 9kg water to soak after 2 days, stir into slurries.
2, leave standstill slurries after, the process water of upper strata waste water complete-reclaiming as paddy stalk slurrying next time proposed.
3, in lower floor's underflow, add the 0.5kg polyvinyl alcohol, under 40～60 ℃ of envrionment conditionss, stir into thick biological slow-released wrap film liquid.
4, the 46kg that will make, diameter are about the urea granules of 1-10mm, are immersed in this slowly-releasing wrap film liquid.
5, fertiliser granulates that will wrapped up by release membranes, carry out dry air after, making with paddy stalk is the biological slow-released urea fertilizer of biological release membranes matrix.
6, detect:
In this fertilizer, paddy stalk, polyvinyl alcohol, urea and water account for 8.9 %, 1.0%, 85.0 %, 5.1% respectively.
The slowly-releasing transformation period of this fertilizer in water is 5.5 days.
Example two,
1, the 5kg paddy stalk is pulverized, placed 9kg water to soak after 2 days, stir into slurries.
2, leave standstill slurries after, the process water of upper strata waste water complete-reclaiming as paddy stalk slurrying next time proposed.
3, in lower floor's underflow, add the 0.6kg polyvinyl alcohol, under 40～60 ℃ of envrionment conditionss, stir into thick biological slow-released wrap film liquid.
4, this slowly-releasing wrap film liquid is sprayed at the urea granules surface that 45kg, diameter are about 1～10mm, makes the biological slow-released wrap film of fertiliser granulates surface parcel one deck.
5, by after the dry air, making with paddy stalk is the biological slow-released urea fertilizer of biological release membranes matrix.
6, detect:
In this fertilizer, paddy stalk, polyvinyl alcohol, urea and water account for 8.9 %, 1.1 %, 84.7 %, 5.3 % respectively.
The slowly-releasing transformation period of this fertilizer in water is 6.8 days.
Example three,
1, the 5kg paddy stalk is pulverized, placed 9kg water to soak after 2 days, stir into slurries.
2, leave standstill slurries, extract the process water of upper strata waste water complete-reclaiming out as paddy stalk slurrying next time.
3, in lower floor's underflow, add the 0.8kg polyvinyl alcohol, under 40～60 ℃ of envrionment conditionss, stir into thick biological slow-released wrap film liquid.
4, this slowly-releasing wrap film liquid is sprayed at the bicarbonate of ammonia particle surface that 45kg, diameter are about 1～10mm, makes the biological slow-released wrap film of fertiliser granulates surface parcel one deck.
5, after dry air, making with paddy stalk is the biological slow-released ammonium bicarbonate fertilizer of biological release membranes matrix.
6, detect:
In this fertilizer, paddy stalk, polyvinyl alcohol, bicarbonate of ammonia and water account for 8.8 %, 1.5 %, 84.5 %, 5.2% respectively.
The slowly-releasing transformation period of this fertilizer in water is 8 days.
Example four,
1, the 6kg paddy stalk is pulverized, placed 11kg water to soak after 2 days, stir into slurries.
2, leave standstill slurries, extract the process water of upper strata waste water complete-reclaiming out as paddy stalk slurrying next time.
3, in lower floor's underflow, add the 0.8kg polyvinyl alcohol, under 40～60 ℃ of envrionment conditionss, stir into thick biological slow-released wrap film liquid.
4, this slowly-releasing wrap film liquid is sprayed at the dry organic compound fertilizer granules surface that 40kg, diameter are about 5～8mm, makes the biological slow-released wrap film of fertiliser granulates surface parcel one deck.
5, after dry air, making with paddy stalk is the biological slow-released organic composite fertilizer of biological release membranes matrix.
6, detect:
In this fertilizer, paddy stalk, polyvinyl alcohol, compoiste fertilizer and water account for 11.2 %, 1.6 %, 83.1 %, 4.1% respectively.
The slowly-releasing transformation period of this fertilizer in water is 16 days.
Claims (3)
1. the slow release fertilizer coating slurry is characterized in that mainly being made up of paddy stalk and polyvinyl alcohol.
2. according to the described slow release fertilizer coating slurry of claim 1, the mass ratio that it is characterized in that described paddy stalk and polyvinyl alcohol is 8～18 ︰ 1～3.
3. the production method of slow release fertilizer coating slurry according to claim 1 is characterized in that earlier paddy stalk being made underflow, adds polyvinyl alcohol again in underflow, stirs into thick coating slurry under 40～60 ℃ of ambient temperature conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110070327 CN102126892B (en) | 2011-03-23 | 2011-03-23 | Coating slurry for slow release fertilizer and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110070327 CN102126892B (en) | 2011-03-23 | 2011-03-23 | Coating slurry for slow release fertilizer and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102126892A true CN102126892A (en) | 2011-07-20 |
| CN102126892B CN102126892B (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110070327 Expired - Fee Related CN102126892B (en) | 2011-03-23 | 2011-03-23 | Coating slurry for slow release fertilizer and production method thereof |
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| CN (1) | CN102126892B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106747899A (en) * | 2016-11-11 | 2017-05-31 | 中国农业科学院农业资源与农业区划研究所 | A kind of film-coated and slow release fertilizer and preparation method thereof and making apparatus |
| CN108191473A (en) * | 2018-02-02 | 2018-06-22 | 中国农业大学 | A kind of granulated fertilizer and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1197091A (en) * | 1997-04-22 | 1998-10-28 | 王铁 | Method of prepn. of degradable soil film |
| CN101284747A (en) * | 2008-05-09 | 2008-10-15 | 广东省农业科学院土壤肥料研究所 | Organic-inorganic slow-released fertilizer and method for preparing same |
-
2011
- 2011-03-23 CN CN 201110070327 patent/CN102126892B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1197091A (en) * | 1997-04-22 | 1998-10-28 | 王铁 | Method of prepn. of degradable soil film |
| CN101284747A (en) * | 2008-05-09 | 2008-10-15 | 广东省农业科学院土壤肥料研究所 | Organic-inorganic slow-released fertilizer and method for preparing same |
Non-Patent Citations (2)
| Title |
|---|
| 李梅婷等: "缓释肥料在膜上灌技术中的应用研究进展", 《农业科学研究》 * |
| 王振中等: "PVA在缓释材料中的研究及应用", 《包装工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106747899A (en) * | 2016-11-11 | 2017-05-31 | 中国农业科学院农业资源与农业区划研究所 | A kind of film-coated and slow release fertilizer and preparation method thereof and making apparatus |
| CN108191473A (en) * | 2018-02-02 | 2018-06-22 | 中国农业大学 | A kind of granulated fertilizer and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102126892B (en) | 2013-10-09 |
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Granted publication date: 20131009 Termination date: 20160323 |