CN106831055A - A kind of method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer - Google Patents
A kind of method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer Download PDFInfo
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- CN106831055A CN106831055A CN201710096439.2A CN201710096439A CN106831055A CN 106831055 A CN106831055 A CN 106831055A CN 201710096439 A CN201710096439 A CN 201710096439A CN 106831055 A CN106831055 A CN 106831055A
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- slurry
- preneutralization
- compound fertilizer
- high nitrogen
- produces high
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G1/00—Mixtures of fertilisers belonging individually to different subclasses of C05
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/10—Solid or semi-solid fertilisers, e.g. powders
- C05G5/12—Granules or flakes
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
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- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a kind of method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer, the phosphoric acid of nitration mixture medial launder is added to obtain in the following way：Phosphoric acid and ammonia are first carried out into preneutralization in ammoniation reactor and obtains preneutralization slurry, by part preneutralization slurry regulation pH value be 4.0~4.5 after, filter residue and filtrate are obtained by press filtration again, the filter residue is sent to powder ammonium workshop for producing phosphorus ammonium together with remaining preneutralization slurry, the filtrate adds in nitration mixture medial launder as phosphoric acid, nitration mixture is mixed into from the potassium acid sulfate in hydrogen potassium reaction, then to deliver to and be passed through ammonia in tubular reactor and reacted.The present invention filters out most of insoluble matter by press filtration, reduces the insolubles content in composite fertilizer, the requirement for alloing it to reach punching fertilising.Meanwhile, urea of the present invention after adding melting in oil spout coating system allows urea to be wrapped in composite fertilizer surface, the nitrogen content in composite fertilizer is effectively improved, with very strong practicality.
Description
Technical field
The present invention relates to the production field of composite fertilizer, more particularly to a kind of slurry-spraying pelletizing production high nitrogen sulfur base water-flush compound fertilizer
Method.
Background technology
Contain the insoluble matters such as substantial amounts of iron, aluminium, magnesium in traditional S-based compound fertilizer, it is impossible to reach the standard of punching fertilising, and
And nitrogen content is generally less than 13%, is only used for base fertilizer, it is impossible to substitute organic fertilizer well, it is impossible to adapt to the hair of modern agriculture
Exhibition.The high nitrogen sulfur base water-flush compound fertilizer market demand is larger, and common S-based compound fertilizer can be used and added in whitewashing groove in production process
Plus urea, or the mode of spraying urea improves nitrogen content in coating machine.But this kind of composite fertilizer is because water-insoluble is higher,
5% or so is reached, dissolution time is slow, and insoluble matter solution causes line clogging, do not reach the requirement of punching fertilising.
Nitrogenous fertilizer is the chemical fertilizer being in great demand in agricultural production, and the slurry preparation flow of traditional slurry-spraying pelletizing technological process is such as
Shown in Fig. 1：It is to be added to sulfuric acid and potassium chloride to react generation potassium acid sulfate in reactive tank, and tubular type is delivered to after adding phosphoric acid
Reactor is passed through ammonia and is reacted, the moisture (liquid that can be vaporized in slurry (mixture, solution and solute) after having reacted
General name), by being ejected into an equipment, the method with heating, taking out pressure, after the moisture content in slurry is vaporized and is separated, retention
The solid of (under certain condition) of will not gasifying forms granular process and claims slurry-spraying pelletizing, is more advanced and applicable at present making
Grain mode.But the S-based compound fertilizer nitrogen content of the technique productions is not enough, and the insoluble matter for containing is more, is not suitable for punching and applies
Fertilizer.
The content of the invention
Present invention aim to according to the deficiencies in the prior art, there is provided a kind of slurry-spraying pelletizing production high nitrogen sulfur base punching is applied
The method of composite fertilizer, not only nitrogen content is high for the composite fertilizer produced with the method, and water-insoluble is few, can be used for punching fertilising.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of a kind of method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer, slurry-spraying pelletizing production high nitrogen sulfur base punching is applied
, first be added in hydrogen potassium reaction for sulfuric acid and potassium chloride and react generation potassium acid sulfate by the method for composite fertilizer, then by potassium acid sulfate
To add in the nitration mixture medial launder deliver to tubular reactor after phosphoric acid and be passed through ammonia and reacted, dodged by flash tank after the completion of reaction
Steaming obtains flashing slurry, is then granulated flash distillation slurry, and the composite fertilizer that granulation is obtained enters oil spout coating after screening
Composite fertilizer is obtained after system coating,
The phosphoric acid for adding nitration mixture medial launder is obtained in the following way：
Phosphoric acid and ammonia are first carried out into preneutralization in ammoniation reactor and obtains preneutralization slurry, by part preneutralization slurry
Regulation pH value is after 4.0~4.5, then to obtain filter residue and filtrate by press filtration, and the filter residue is together with remaining preneutralization slurry
Powder ammonium workshop is sent to for producing phosphorus ammonium, the filtrate adds in nitration mixture medial launder as phosphoric acid, and from hydrogen potassium reaction
Potassium acid sulfate be mixed into nitration mixture, then to deliver to and be passed through ammonia in tubular reactor and reacted.The part preneutralization slurry can
PH value is adjusted with by the way of alkali is added, more preferably, the present invention is preferably added to the effect of the filtering insoluble matter when pH value is larger
Ammonia.The process of the regulation pH value is preferably individually carried out in ammonification geosyncline.The less preneutralization material of a part of pH value
Slurry can be used for being sent to powder ammonium system, and the larger preneutralization slurry of another part pH value produces composite fertilizer by being used for after press filtration,
Ratio those skilled in the art of the part can be adjusted as needed, and effect of the invention is not influenceed.
Preferably, in the oil spout coating system, after first urea is melted, then composite fertilizer's table after sieving is sprayed
Face, makes the nitrogen content of composite fertilizer more than 15%.
Preferably, the temperature of the preneutralization slurry be 75~80 DEG C, pH value be 3.5~4.0, density be 1.25~
1.28mg/L.Preneutralization slurry under the pH value can be used for producing phosphorus ammonium, it is also possible to by after further regulation pH value
For press filtration.
Preferably, the density of the filtrate is 1.20~1.23mg/L, wherein P2O5Content be 19~20%.
Preferably, the reaction temperature in the tubular reactor is 110 DEG C, and pH value is 4.5~5.
Preferably, the press filtration is carried out by plate type pressure filter.
Preferably, the prilling temperature is below 450 DEG C.
Slurry-spraying pelletizing of the invention produced high nitrogen sulfur base water-flush compound fertilizer production method before nitration mixture by controlling the pH to be
4.0~4.5 and filter out most of insoluble matter by press filtration, reduce the insolubles content in composite fertilizer, it is reached punching
The requirement of fertilising.Meanwhile, urea of the present invention after adding melting in oil spout coating system is wrapped in urea multiple
Hefei surface, effectively improves the nitrogen content in composite fertilizer.Also, the present invention improves the utilization of synthesis ammonia by technology controlling and process
Rate.The present invention can utilize existing slurry-spraying pelletizing production line, it is only necessary to increase plate and frame filter press, low cost, what is obtained rushes
Compound fertilizer granules rounding is applied, insoluble matter is few, and nitrogen content is high, with very strong practicality.
Brief description of the drawings
Fig. 1 is the process chart that existing slurry-spraying pelletizing produces S-based compound fertilizer；
Fig. 2 is the process chart that slurry-spraying pelletizing of the invention produces high nitrogen sulfur base water-flush compound fertilizer.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail, is easy to more clearly understand the present invention,
But they do not constitute to the present invention and limit.
The method that the existing slurry-spraying pelletizing of embodiment 1 produces S-based compound fertilizer
As shown in figure 1, first sulfuric acid and potassium chloride are added in hydrogen potassium reaction react generation potassium acid sulfate, then by sulfuric acid
Hydrogen potassium to be added in the nitration mixture medial launder deliver to tubular reactor after phosphoric acid and be passed through ammonia and reacted, by flash distillation after the completion of reaction
Groove flash distillation obtains flashing slurry, is then granulated flash distillation slurry, and the composite fertilizer that granulation is obtained enters oil spout after screening
Composite fertilizer is obtained after coating system coating.
It is more than 5% that insoluble matter is contained in the composite fertilizer for producing in the method, and nitrogen content is 11~12%, compound fertilizer granules
2~4mm of size, it is impossible to applied fertilizer for rushing.
The method that the slurry-spraying pelletizing of the invention of embodiment 2 produces high nitrogen sulfur base water-flush compound fertilizer
As shown in Fig. 2 the phosphoric acid for adding nitration mixture medial launder is obtained in the following way：
Sulfuric acid and potassium chloride are added to generation potassium acid sulfate is reacted in hydrogen potassium reaction.Again by phosphoric acid and ammonia in ammonification
Preneutralization is carried out in reactor and obtains preneutralization slurry, the temperature of preneutralization slurry is 75~80 DEG C, and pH value is 3.5~4.0, close
It is 1.25~1.28mg/L to spend.It is after 4.0~4.5, then to be obtained by press filtration by 1/3rd preneutralization slurry regulation pH value
Filter residue and filtrate, the density of filtrate is 1.20~1.23mg/L, wherein P2O5Content be 19~20%.In preneutralization slurry
A large amount of insoluble matters are press-filtered out in filter residue, and insoluble matter is already below 0.5% in filtrate.Three points of the filter residue and residue
Two preneutralization slurry be sent to powder ammonium workshop together for producing phosphorus ammonium, the filtrate adds nitration mixture medial launder as phosphoric acid
In, nitration mixture is mixed into from the potassium acid sulfate in hydrogen potassium reaction, then deliver to tubular reactor and be passed through ammonia and reacted, manage
Reaction temperature in formula reactor is 110 DEG C, and pH value is 4.5~5.Obtain flashing slurry by flash tank flash distillation after having reacted,
By it is described flash distillation slurry be sent to granulation built-in temperature granulated below 450 DEG C, comminutor out after composite fertilizer through sieving
Obtained after entering oil spout coating system coating after point.In the oil spout coating system, after first urea is melted, then spray
Composite fertilizer surface after sieving, makes the nitrogen content of composite fertilizer more than 15%.
The high nitrogen sulfur base water-flush compound fertilizer yield obtained in the present embodiment 2 is high, and nitrogen content can reach more than 15%, and water is not
Within 0.5%, compound fertilizer granules 2~4mm of size, particle rounding can be used for punching fertilising to molten thing.
Above example only represents the more preferred technical scheme of the present invention, is not departing from claims of the present invention protection
On the premise of scope, the numerical value in embodiment is adjusted and falls within the scope of protection of the invention.
Claims (7)
1. a kind of method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer, is first added to hydrogen nak response by sulfuric acid and potassium chloride
Generation potassium acid sulfate is reacted in groove, then potassium acid sulfate is delivered into tubular reactor after addition phosphoric acid in nitration mixture medial launder and be passed through ammonia
Gas is reacted, and obtains flashing slurry by flash tank flash distillation after the completion of reaction, is then granulated flash distillation slurry, is granulated
To composite fertilizer after screening into obtaining composite fertilizer after oil spout coating system coating, it is characterised in that：
The phosphoric acid for adding nitration mixture medial launder is obtained in the following way：
Phosphoric acid and ammonia are first carried out into preneutralization in ammoniation reactor and obtains preneutralization slurry, by the regulation of part preneutralization slurry
PH value is after 4.0~4.5, then to obtain filter residue and filtrate by press filtration, and the filter residue is sent to together with remaining preneutralization slurry
Powder ammonium workshop is used to produce phosphorus ammonium, and the filtrate adds in nitration mixture medial launder as phosphoric acid, and from the sulphur in hydrogen potassium reaction
Potassium hydrogen phthalate is mixed into nitration mixture, then to deliver to and be passed through ammonia in tubular reactor and reacted.
2. the method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer according to claim 1, it is characterised in that：The spray
In oily coating system, after first urea is melted, then composite fertilizer surface after sieving is sprayed, the nitrogen content of composite fertilizer is existed
More than 15%.
3. the method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer according to claim 1, it is characterised in that：It is described pre-
The temperature of neutralize slip is 75~80 DEG C, and pH value is 3.5~4.0, and density is 1.25~1.28mg/L.
4. the method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer according to claim 1, it is characterised in that：The filter
The density of liquid is 1.20~1.23mg/L, wherein P2O5Content be 19~20%.
5. the method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer according to claim 1, it is characterised in that：The pipe
Reaction temperature in formula reactor is 110 DEG C, and pH value is 4.5~5.0.
6. the method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer according to claim 1, it is characterised in that：The pressure
Filter is carried out by plate type pressure filter.
7. the method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer according to claim 1, it is characterised in that：It is described to make
Grain temperature is below 450 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710096439.2A CN106831055A (en) | 2017-02-22 | 2017-02-22 | A kind of method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer |
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| CN201710096439.2A CN106831055A (en) | 2017-02-22 | 2017-02-22 | A kind of method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer |
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| CN106831055A true CN106831055A (en) | 2017-06-13 |
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| CN201710096439.2A Pending CN106831055A (en) | 2017-02-22 | 2017-02-22 | A kind of method that slurry-spraying pelletizing produces high nitrogen sulfur base water-flush compound fertilizer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107141048A (en) * | 2017-07-12 | 2017-09-08 | 烟台市昊星晟信息技术有限公司 | A kind of production method for high nitrogen fertilizer of whitewashing |
| CN108752120A (en) * | 2018-08-24 | 2018-11-06 | 山东鸿运工程设计有限公司 | A kind of high nitrogen sulfur base production device for compound fertilizer and its production method |
| CN115677409A (en) * | 2022-11-09 | 2023-02-03 | 应城市新都化工复合肥有限公司 | High-nitrogen compound fertilizer and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318855A (en) * | 2007-06-07 | 2008-12-10 | 湖北洋丰股份有限公司 | High-efficiency high-concentration sulphur based complex fertilizer |
| CN102219591A (en) * | 2011-05-19 | 2011-10-19 | 武汉市中东化工有限公司 | Method of producing sulfur-based high nitrogen composite fertilizer by spray granulation |
| CN105315037A (en) * | 2014-08-05 | 2016-02-10 | 中化山东肥业有限公司 | Process for producing high potassium nitro fertilizer by gunite method |
-
2017
- 2017-02-22 CN CN201710096439.2A patent/CN106831055A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318855A (en) * | 2007-06-07 | 2008-12-10 | 湖北洋丰股份有限公司 | High-efficiency high-concentration sulphur based complex fertilizer |
| CN102219591A (en) * | 2011-05-19 | 2011-10-19 | 武汉市中东化工有限公司 | Method of producing sulfur-based high nitrogen composite fertilizer by spray granulation |
| CN105315037A (en) * | 2014-08-05 | 2016-02-10 | 中化山东肥业有限公司 | Process for producing high potassium nitro fertilizer by gunite method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107141048A (en) * | 2017-07-12 | 2017-09-08 | 烟台市昊星晟信息技术有限公司 | A kind of production method for high nitrogen fertilizer of whitewashing |
| CN108752120A (en) * | 2018-08-24 | 2018-11-06 | 山东鸿运工程设计有限公司 | A kind of high nitrogen sulfur base production device for compound fertilizer and its production method |
| CN115677409A (en) * | 2022-11-09 | 2023-02-03 | 应城市新都化工复合肥有限公司 | High-nitrogen compound fertilizer and preparation method thereof |
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Application publication date: 20170613 |