CN102701824A - Production method for macro-element water-soluble fertilizer - Google Patents
Production method for macro-element water-soluble fertilizer Download PDFInfo
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- CN102701824A CN102701824A CN2012101925547A CN201210192554A CN102701824A CN 102701824 A CN102701824 A CN 102701824A CN 2012101925547 A CN2012101925547 A CN 2012101925547A CN 201210192554 A CN201210192554 A CN 201210192554A CN 102701824 A CN102701824 A CN 102701824A
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Abstract
The invention discloses a production method for a macro-element water-soluble fertilizer. The production method comprises the following steps of: neutralizing wet-process phosphoric acid with ammonia, filtering, and then dissolving ammonium nitrate, potassium nitrate and potassium chloride, concentrating, crystallizing and drying to obtain the macro-element water-soluble fertilizer. Compared with a production technology for the oversea water-soluble fertilizer, the production method has the advantages that the process control is simpler, production liquid waste is easily treated, simultaneously the production cost is lower, and the production method is more in favor of market promotion; and compared with the water-soluble fertilizer produced by adopting a domestic simple physical mixing method, the macro-element water-soluble fertilizer has the advantages that the appearance of the macro-element water-soluble fertilizer is attractive, the contents of insoluble matters and impurities in water are really enabled to be controllable, and the acidity and alkalinity of the macro-element water-soluble fertilizer can be better controlled.
Description
Technical field
The invention belongs to field of compound fertilizer production, specifically, relate to working method from a kind of water-soluble fertilizer.
Background technology
The polynary fertilizer of nitrogen phosphorus potassium is that a kind of compound is fertile.Compound fertilizer is world Fertilizer industrial development direction.Global consumption has surpassed 1/3 of chemical fertilizer aggregate consumption, and China accounts for 18% of domestic and international chemical fertilizer consumption.The use of fertilizer also changes " balance fertilizing " that nutritive ingredient cooperates over to by the shortage that overcomes single-element in the past do " correcting fertilising ", and compound fertilizer arises at the historic moment just in this case.
Water soluble fertilizer be a kind of can water-soluble fully polyelement composite fertilizer; It can promptly be dissolved in the water; Absorbed by crop more easily, and its absorption rate is higher relatively, more crucial is that it can be applied to spray facilities such as drip irrigation; Realization liquid manure is integrated, reaches the usefulness that water-saving is economized fertile saving of labor.Water soluble fertilizer can contain the needed whole nutritive elements of plant growth; Like N, P, K, Ca, Mg, S and trace element etc.; Make its utilization rate of fertilizer almost be conventional composite chemical fertilizer 2-3 doubly (in China, the utilization rate of fertilizer of common composite fertilizer is merely 30%-40%) secondly, water soluble fertilizer is a readily avaiable fertilizer; Can let the grower see the effect and the performance of fertilizer quickly, can make adjustment according to the different growing ways of crop at any time.Because the application process of water soluble fertilizer is application with irrigation water, institute is so that fertilising is very even, and this has also established solid basis for improving the yield and quality.Water soluble fertilizer impurity is less, and specific conductivity is low, and the very convenient adjusting of working concentration is not so even it also is safe to the tender seedling of children, worry causing adverse consequencess such as burning seedling.
External water-soluble fertilizer is mainly the synthetic water-soluble fertilizer of full chemical reaction at present, and its production technology is ripe day by day.The manufacturing enterprise of domestic water-soluble fertilizer has no the production that is mixed of the workshop-based simple physical of mountain vallage of technology content.
The water-soluble fertilizer of this explained hereafter is compared with external water-soluble fertilizer, and technology controlling and process is comparatively simple, produces waste liquid and handles easily, and production cost is on the low side simultaneously, more helps marketing; Compare with the domestic simple physical water-soluble fertilizer of producing that is mixed, product appearance is good, can guarantee really that water-insoluble and foreign matter content are controlled, can better control the potential of hydrogen of product.
Summary of the invention
For solving above technical problem, the object of the present invention is to provide the water-soluble fertilizer production method of macroelement that a kind of technology is simple, production cost is low.
The present invention seeks to realize like this: the working method of the water-soluble fertilizer of a kind of macroelement; Its key is: with the neutralization of phosphoric acid by wet process and ammonia, filter, dissolve in ammonium nitrate, saltpetre, Repone K then, obtain the water-soluble fertilizer of macroelement through condensing crystal, drying.
The object of the invention is specifically realized through following steps:
(1) in a reaction kettle, dropping into reactor volume 50% weight concentration is 18～25%P
2O
5Phosphoric acid by wet process; And slowly feeding ammonia or ammoniacal liquor, neutralization reaction is carried out in control PH=7.8～8.0 under 30～100 ℃ of temperature, after pickling process absorbs the evaporable ammonia, be back to simultaneously in reaction kettle; Control PH=7.8～8.0 are the neutralization reaction terminal point first time; After stopping to feed intake, continue to stir 10～90 minutes, obtain the intermediates diammonium phosphate slurry;
(2) the intermediates diammonium phosphate slurry that (1) step is obtained is carried out the solid-liquid separation first time, removes impurity, and in No. two reaction kettles of diammonium phosphate slurry input after the filtration, filter cake is sent to composite fertilizer source mill;
(3) start the whisking appliance of No. two reaction kettles, in No. two reaction kettles, add ammonium nitrate, saltpetre, Repone K etc. in proportion and carry out stirring and dissolving for raw material;
(4) the material oar that (3) step is obtained is delivered to heat in the concentrating unit and is concentrated, and is 1.35～1.40 until specific density;
(5) enriching soln with (4) step moves in the crystallizer tank, and in crystallizer tank, adds trace elements such as iron, copper, manganese, amine molybdate, borax, zinc sulfate, at 40 ℃ of left and right sides crystallisation by cooling of temperature, forms the water-soluble fertile xln of multielement;
(6) with the water-soluble fertile xln of the multielement of (5) step, carry out the solid-liquid separation second time, mother liquor returns (3) step, and xln makes the water-soluble fertilizer of macroelement after super-dry;
Above-described reaction kettle reaction kettle equipment comprises one or more in employing stainless steel cauldron, inner liner polytetrafluoroethylene reaction kettle and the enamel reaction still, and No. two reaction kettles are incubated.
The amount of raw materials such as above-described adding ammonium nitrate, saltpetre, Repone K will be according to concrete water-soluble fertilizer
Prescription decides.The adding of ammonium nitrate, saltpetre and Repone K is for N, P, K are provided, said ammonium nitrate,
Saltpetre and Repone K add-on are according to the content decision of N, P, K in the type of production product.
Above-described absorption equipment comprises bubble absorbing tower or packed absorber or tray absorption columns.
Above-described solid-liquid separating equipment, solid-liquid separation adopts plate-and-frame filter press for the first time, and solid-liquid separation adopts separating centrifuge for the second time.
Above-described thickening equipment is the pump circulation vacuum concentrator.
Above-described drying plant comprises rotating drum dryer or vibratory screening apparatus drying machine, vulcanizes bed.
Above-described equipment connects, comprise reaction kettle respectively with being connected of plate-and-frame filter press and absorption tower, No. two reaction kettle is connected with vacuum concentrator, vacuum concentrator is connected with crystallizer tank, crystallizer tank is connected with whizzer, whizzer is connected with moisture eliminator.
Beneficial effect: technology of the present invention is compared with external water-soluble fertile production technique, and technology controlling and process is comparatively simple, produces waste liquid and handles easily, and production cost is on the low side simultaneously, more helps marketing; Compare with the domestic simple physical water-soluble fertilizer of producing that is mixed, product appearance is good, can guarantee really that water-insoluble and foreign matter content are controlled, can better control the potential of hydrogen of product.
Figure of description
Fig. 1 is a process flow sheet.
Embodiment
Embodiment 1
As shown in Figure 1, reactor volume 50% weight concentration is dropped in (1) in a stainless steel cauldron be 18～25%P
2O
5Phosphoric acid by wet process; And slowly feeding ammonia, control PH=7.8 carries out neutralization reaction for 30 ℃ in temperature, through pickling process absorbs the evaporable ammonia with bubble absorbing tower after, is back to simultaneously in reaction kettle; Control PH=7.8 is the neutralization reaction terminal point first time; After stopping to feed intake, continue to stir 10 minutes, obtain the intermediates diammonium phosphate slurry;
(2) the intermediates diammonium phosphate slurry that (1) step is obtained is carried out the separation of solid-liquid employing first time plate-and-frame filter press, removes impurity, and in No. two inner liner polytetrafluoroethylene reaction kettles of diammonium phosphate slurry input after the filtration, filter cake is sent to composite fertilizer source mill;
(3) start the whisking appliance of No. two reaction kettles, in No. two reaction kettles, add ammonium nitrate, saltpetre, Repone K etc. in proportion and carry out stirring and dissolving for raw material;
(4) the material oar that (3) step is obtained is delivered to heat in the pump circulation vacuum concentrator and is concentrated, and is 1.35 until specific density;
(5) enriching soln with (4) step moves in the crystallizer tank, and in crystallizer tank, adds trace elements such as iron, copper, manganese, amine molybdate, borax, zinc sulfate, at 40 ℃ of left and right sides crystallisation by cooling of temperature, forms the water-soluble fertile xln of multielement;
(6) with the water-soluble fertile xln of the multielement of (5) step, carry out the solid-liquid separation second time with separating centrifuge, mother liquor returns (3) step, makes the water-soluble fertilizer of macroelement after the xln process rotating drum dryer drying.
Embodiment 2
As shown in Figure 1, reactor volume 50% weight concentration is dropped in (1) in an enamel reaction still be 18～25%P
2O
5Phosphoric acid by wet process; And slowly feeding ammoniacal liquor, control PH=8.0 carries out neutralization reaction under 100 ℃ of temperature, through pickling process absorbs the evaporable ammonia with packed absorber after, be back to simultaneously in reaction kettle; Control PH=8.0 is the neutralization reaction terminal point first time; After stopping to feed intake, continue to stir 90 minutes, obtain the intermediates diammonium phosphate slurry;
(2) the intermediates diammonium phosphate slurry that (1) step is obtained is carried out the separation of solid-liquid employing first time plate-and-frame filter press, removes impurity, and in No. two enamel reaction stills of diammonium phosphate slurry input after the filtration, filter cake is sent to composite fertilizer source mill;
(3) start the whisking appliance of No. two reaction kettles, in No. two reaction kettles, add ammonium nitrate, saltpetre, Repone K etc. in proportion and carry out stirring and dissolving for raw material;
(4) the material oar that (3) step is obtained is delivered to heat in the pump circulation vacuum concentrator and is concentrated, and is 1.40 until specific density;
(5) enriching soln with (4) step moves in the crystallizer tank, and in crystallizer tank, adds trace elements such as iron, copper, manganese, amine molybdate, borax, zinc sulfate, at 40 ℃ of left and right sides crystallisation by cooling of temperature, forms the water-soluble fertile xln of multielement;
(6) with the water-soluble fertile xln of the multielement of (5) step, carry out the solid-liquid separation second time with separating centrifuge, mother liquor returns (3) step, makes the water-soluble fertilizer of macroelement after the xln process vibratory screening apparatus drying machine drying.
Embodiment 3
As shown in Figure 1, reactor volume 50% weight concentration is dropped in (1) in a stainless steel cauldron be 18～25%P
2O
5Phosphoric acid by wet process; And slowly feeding ammoniacal liquor, control PH=8.0 carries out neutralization reaction under 90 ℃ of temperature, through pickling process absorbs the evaporable ammonia with bubble absorbing tower or packed absorber or tray absorption columns after, be back to simultaneously in reaction kettle; Control PH=8.0 is the neutralization reaction terminal point first time; After stopping to feed intake, continue to stir 80 minutes, obtain the intermediates diammonium phosphate slurry;
(2) the intermediates diammonium phosphate slurry that (1) step is obtained is carried out the separation of solid-liquid employing first time plate-and-frame filter press, removes impurity, and in No. two enamel reaction stills of diammonium phosphate slurry input after the filtration, filter cake is sent to composite fertilizer source mill;
(3) start the whisking appliance of No. two reaction kettles, in No. two reaction kettles, add ammonium nitrate, saltpetre, Repone K etc. in proportion and carry out stirring and dissolving for raw material;
(4) the material oar that (3) step is obtained is delivered to heat in the pump circulation vacuum concentrator and is concentrated, and is 1.40 until specific density;
(5) enriching soln with (4) step moves in the crystallizer tank, and in crystallizer tank, adds trace elements such as iron, copper, manganese, amine molybdate, borax, zinc sulfate, at 40 ℃ of left and right sides crystallisation by cooling of temperature, forms the water-soluble fertile xln of multielement;
(6) with the water-soluble fertile xln of the multielement of (5) step, carry out the solid-liquid separation second time with separating centrifuge, mother liquor returns (3) step, and xln makes the water-soluble fertilizer of macroelement after over cure bed drying.
Claims (6)
1. the working method of the water-soluble fertilizer of macroelement is characterized in that: with phosphoric acid by wet process and ammonia neutralization, filter, dissolve in ammonium nitrate, saltpetre, Repone K then, obtain the water-soluble fertilizer of macroelement through condensing crystal, drying.
2. according to the working method of the water-soluble fertilizer of the said a kind of macroelement of claim 1, specifically by carrying out as follows:
(1) in a reaction kettle, dropping into reactor volume 50% weight concentration is 18～25%P
2O
5Phosphoric acid by wet process; And slowly feeding ammonia or ammoniacal liquor, neutralization reaction is carried out for 30～100 ℃ in temperature in control PH=7.8～8.0, after pickling process absorbs the evaporable ammonia, is back to simultaneously in reaction kettle; Control PH=7.8～8.0 are the neutralization reaction terminal point first time; After stopping to feed intake, continue to stir 10～90 minutes, obtain the intermediates diammonium phosphate slurry;
(2) the intermediates diammonium phosphate slurry that step (1) is obtained is carried out the solid-liquid separation first time, removes impurity, and in No. two reaction kettles of diammonium phosphate slurry input after the filtration, filter cake is sent to composite fertilizer source mill;
(3) start the whisking appliance of No. two reaction kettles, in No. two reaction kettles, add ammonium nitrate, saltpetre, Repone K and carry out stirring and dissolving;
(4) the material oar that step (3) is obtained is delivered to heat in the concentrating unit and is concentrated, and is 1.35～1.40 until specific density;
(5) enriching soln with (4) step moves in the crystallizer tank, and in crystallizer tank, adds iron, copper, manganese, amine molybdate, borax, zinc sulfate trace element, at 40 ℃ of left and right sides crystallisation by cooling of temperature, forms the water-soluble fertile xln of multielement;
(6) with the water-soluble fertile xln of the multielement of (5) step, carry out the solid-liquid separation second time, xln makes the water-soluble fertilizer of macroelement after super-dry.
3. according to the working method of the water-soluble fertilizer of the said a kind of macroelement of claim 2, it is characterized in that: the mother liquor after the middle solid-liquid separation for the second time of said step (6) returns (3) step.
4. according to the working method of the water-soluble fertilizer of the said a kind of macroelement of claim 2, it is characterized in that: said reaction kettle is one or more in stainless steel cauldron, inner liner polytetrafluoroethylene reaction kettle and the enamel reaction still.
5. according to the working method of the water-soluble fertilizer of the said a kind of macroelement of claim 2, it is characterized in that: in the solid-liquid separating equipment that is adopted, solid-liquid separation adopts plate-and-frame filter press for the first time, and solid-liquid separation adopts separating centrifuge for the second time.
6. according to the working method of the water-soluble fertilizer of the said a kind of macroelement of claim 2; It is characterized in that: the adding of said ammonium nitrate, saltpetre and Repone K is for N, P, K are provided; Said ammonium nitrate, saltpetre and Repone K add-on are according to the content decision of N, P, K in the type of production product.
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| CN2012101925547A CN102701824A (en) | 2012-06-12 | 2012-06-12 | Production method for macro-element water-soluble fertilizer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976869A (en) * | 2012-12-06 | 2013-03-20 | 江苏湛蓝科技开发有限公司 | Technique for producing macroelement water-soluble fertilizer and coproducing slow-release fertilizer |
| CN105110892A (en) * | 2015-07-31 | 2015-12-02 | 深圳市芭田生态工程股份有限公司 | Macroelement water soluble fertilizer and preparation method therefor |
| CN105646036A (en) * | 2015-12-31 | 2016-06-08 | 王丰登 | Method for producing multi-element water-soluble fertilizer |
| CN107285813A (en) * | 2016-04-11 | 2017-10-24 | 湖北南轻法麦克斯作物营养有限公司 | A kind of method that use rock phosphate in powder produces Water soluble fertilizer |
| CN107986854A (en) * | 2017-11-24 | 2018-05-04 | 广西宝树金花茶有限公司 | A kind of Camellia nitidissima quickly breeding compound fertilizer |
| CN110723991A (en) * | 2019-12-04 | 2020-01-24 | 新疆丰泰化工科技有限公司 | Crystal zinc sulfate magnesium fertilizer and production method thereof |
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| US3620668A (en) * | 1968-05-17 | 1971-11-16 | United States Steel Corp | Ammoniated wet process phosphoric acid suspension base |
| CN85102376A (en) * | 1985-04-01 | 1986-09-17 | 成都科技大学 | The production method of urea-(NH 4) 3 PO 4 compound fertilizer |
| CN1129684A (en) * | 1995-02-22 | 1996-08-28 | 四川联合大学 | Combined Production of Potassium Ammonium Sulfate and Nitrogen, Phosphorus and Potassium Compound Fertilizer |
| CN1872799A (en) * | 2006-06-16 | 2006-12-06 | 四川川大中德环保技术有限公司 | Associated production method by using condensed phosphoric acid to produce diammonium phosphate, and by using condensed acidic feed pulp to produce phosphor ammonium or/and compound fertilizer |
| CN101734970A (en) * | 2009-12-17 | 2010-06-16 | 中化重庆涪陵化工有限公司 | Method for preparing urea ammonium phosphate by employing multi-level neutralization and acidic slurry concentration |
| CN101857210A (en) * | 2010-06-04 | 2010-10-13 | 广西明利集团有限公司 | Method for producing industrial grade diammonium phosphate from wet-process phosphoric acid |
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2012
- 2012-06-12 CN CN2012101925547A patent/CN102701824A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3620668A (en) * | 1968-05-17 | 1971-11-16 | United States Steel Corp | Ammoniated wet process phosphoric acid suspension base |
| CN85102376A (en) * | 1985-04-01 | 1986-09-17 | 成都科技大学 | The production method of urea-(NH 4) 3 PO 4 compound fertilizer |
| CN1129684A (en) * | 1995-02-22 | 1996-08-28 | 四川联合大学 | Combined Production of Potassium Ammonium Sulfate and Nitrogen, Phosphorus and Potassium Compound Fertilizer |
| CN1872799A (en) * | 2006-06-16 | 2006-12-06 | 四川川大中德环保技术有限公司 | Associated production method by using condensed phosphoric acid to produce diammonium phosphate, and by using condensed acidic feed pulp to produce phosphor ammonium or/and compound fertilizer |
| CN101734970A (en) * | 2009-12-17 | 2010-06-16 | 中化重庆涪陵化工有限公司 | Method for preparing urea ammonium phosphate by employing multi-level neutralization and acidic slurry concentration |
| CN101857210A (en) * | 2010-06-04 | 2010-10-13 | 广西明利集团有限公司 | Method for producing industrial grade diammonium phosphate from wet-process phosphoric acid |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976869A (en) * | 2012-12-06 | 2013-03-20 | 江苏湛蓝科技开发有限公司 | Technique for producing macroelement water-soluble fertilizer and coproducing slow-release fertilizer |
| CN105110892A (en) * | 2015-07-31 | 2015-12-02 | 深圳市芭田生态工程股份有限公司 | Macroelement water soluble fertilizer and preparation method therefor |
| CN105646036A (en) * | 2015-12-31 | 2016-06-08 | 王丰登 | Method for producing multi-element water-soluble fertilizer |
| CN107285813A (en) * | 2016-04-11 | 2017-10-24 | 湖北南轻法麦克斯作物营养有限公司 | A kind of method that use rock phosphate in powder produces Water soluble fertilizer |
| CN107986854A (en) * | 2017-11-24 | 2018-05-04 | 广西宝树金花茶有限公司 | A kind of Camellia nitidissima quickly breeding compound fertilizer |
| CN110723991A (en) * | 2019-12-04 | 2020-01-24 | 新疆丰泰化工科技有限公司 | Crystal zinc sulfate magnesium fertilizer and production method thereof |
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Application publication date: 20121003 |