CN111138223A - Granulation method of compound fertilizer - Google Patents
Granulation method of compound fertilizer Download PDFInfo
- Publication number
- CN111138223A CN111138223A CN201811210717.3A CN201811210717A CN111138223A CN 111138223 A CN111138223 A CN 111138223A CN 201811210717 A CN201811210717 A CN 201811210717A CN 111138223 A CN111138223 A CN 111138223A
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- CN
- China
- Prior art keywords
- compound fertilizer
- granulation
- granulator
- parts
- drying
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Classifications
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C3/00—Fertilisers containing other salts of ammonia or ammonia itself, e.g. gas liquor
-
- 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
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a granulation method of a compound fertilizer, which comprises the following steps: 1) preparing materials: weighing compound fertilizer raw materials, and uniformly mixing to obtain a compound fertilizer; 2) and (3) granulation: conveying the compound fertilizer to a granulator for granulation; then inputting starch into the granulator through an infusion pump, and simultaneously spraying water vapor into the granulator; granulating for 7-8 minutes to obtain compound fertilizer granules; the weight ratio of the compound fertilizer to the starch is 1000: 3-4; 3) and (3) drying: drying and air-cooling compound fertilizer granules after granulation to remove water, and controlling the water content of the product to be 1.5-2%; 4) the product is obtained after screening, the invention promotes the raw materials to granulate rapidly by spraying steam for providing high heat, and the bonding efficiency is improved when adding starch to granulate, the drying efficiency of the method can be improved by 50% compared with the traditional method, the granulation time can be shortened by 50%, the production period can be greatly shortened, the energy can be saved, the cost can be reduced, the production link can be improved, and the product quality can be improved.
Description
Technical Field
The invention relates to a granulation method of a compound fertilizer, belonging to the technical field of compound fertilizer manufacturing.
Background
At present, most of disc or roller granulators used in compound fertilizer plants spray a proper amount of water into mixed raw materials during granulation so as to form granules, and the materials are gradually bonded together into spheres along with the continuous rolling of the granulator. Many manufacturers also spray ammonium chloride as a bonding medium into a disc or roller granulator for granulation after the ammonium chloride is melted, but because the ammonium chloride is melted and then undergoes a condensation reaction to generate biuret and triurea and simultaneously generate NH3, a large amount of nitrogen nutrients are lost, the nutrient loss reaches 2-3%, and meanwhile, the overflowed ammonia causes serious environmental pollution. Therefore, the traditional granulation method has the defects of long production period, high energy consumption, environmental pollution and easy fertilizer loss.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a compound fertilizer granulation method, which promotes the raw materials to be rapidly granulated by injecting steam for providing high heat, and improves the bonding efficiency during granulation by adding starch, because the water content is less, the pelletized compound fertilizer reaches or approaches the temperature of the materials used in the traditional drying method due to the high heat of the steam, the drying efficiency is greatly improved, compared with the traditional method, the drying efficiency can be improved by 50 percent, the production period can be greatly shortened, the energy can be saved, the cost can be reduced, the production link can be improved, and the product quality can be improved.
The purpose of the invention can be achieved by adopting the following technical scheme:
a granulation method of a compound fertilizer is characterized by comprising the following steps:
1) preparing materials: weighing compound fertilizer raw materials, mixing, and uniformly stirring to obtain a compound fertilizer;
2) and (3) granulation: conveying the compound fertilizer into a granulator, and starting the granulator to granulate; then inputting starch into the granulator through an infusion pump, and simultaneously spraying water vapor into the granulator; continuously granulating for 7-8 minutes to obtain compound fertilizer granules; wherein the weight ratio of the compound fertilizer to the starch is 1000: 3-4;
3) and (3) drying: after granulation, drying and air-cooling compound fertilizer granules to remove water, and controlling the water content of the product to be 1.5-2%;
4) and screening the dried product to obtain the product.
The purpose of the invention can be achieved by adopting the following technical scheme:
one embodiment for implementing the present invention is: in the step 1), the compound fertilizer comprises the following raw materials in parts by weight: 400 portions of ammonium chloride, 300 portions of potassium chloride and 500 portions of calcium carbonate.
One embodiment for implementing the present invention is: in the step 1), the compound fertilizer comprises the following raw materials in parts by weight: 380 parts of ammonium chloride, 135 parts of potassium chloride and 485 parts of calcium carbonate.
One embodiment for implementing the present invention is: in the step 1), the compound fertilizer comprises the following raw materials in parts by weight: 337 parts of ammonium chloride, 250 parts of potassium chloride and 415 parts of calcium carbonate.
One embodiment for implementing the present invention is: in step 2), the granulator is a disk granulator.
One embodiment for implementing the present invention is: in step 2), the temperature of the water vapor is 170 ℃.
One embodiment for implementing the present invention is: in the step 3), the drying and air cooling time is 15 minutes.
The invention has the beneficial effects that:
according to the invention, the compound fertilizer raw materials are conveyed into the disc granulator, when the disc granulator carries out rolling granulation, the starch is conveyed into the disc granulator through the infusion pump, and the water vapor is sprayed into the disc granulator at the same time, so that the materials are adhered into balls along with the continuous rolling of the granulator due to the high heat and strong adhesion effect provided by the water vapor and the starch, and finally compound fertilizer particles with low water content are obtained. The high heat of the steam enables the pelletized compound fertilizer to reach or approach the temperature reached by materials used in the traditional drying method, meanwhile, the drying efficiency is greatly improved due to less water content, the compound fertilizer is air-cooled after being dried, and the compound fertilizer can reach the water content standard of products after being screened, compared with the traditional method, the drying efficiency can be improved by 50%, and the granulation time can be shortened by 50%. The addition of starch can increase the silicon nutrient in the compound fertilizer, and the drying efficiency is improved, so that the loss of the nutrient is reduced, the product quality is improved, and the process is shortened.
In conclusion, compared with the prior art, the technology of the invention improves the drying efficiency by 50 percent, and the granulation time can be shortened by 50 percent, which only needs 7 to 8 minutes; the invention can greatly shorten the production period, save energy, reduce cost, improve production links and improve product quality.
Detailed Description
The invention will be further described with reference to specific embodiments:
specific example 1:
the granulation method of the compound fertilizer described in this embodiment is performed according to the following steps:
1) preparing materials: respectively weighing 380 Kg of ammonium chloride, 135 Kg of potassium chloride and 485 Kg of calcium carbonate, and uniformly stirring after mixing to obtain the compound fertilizer;
2) and (3) granulation: conveying the compound fertilizer into a disc granulator, and starting the disc granulator for granulation; then 3Kg of starch is input into the disk granulator through the infusion pump, and simultaneously water vapor is sprayed into the disk granulator; continuously granulating for 7-8 minutes to obtain compound fertilizer granules; wherein the weight ratio of the compound fertilizer to the starch is 1000: 3; the steam is supplied by a full-automatic oil boiler, the model of the full-automatic oil boiler is LWS0.1-0.7, the full-automatic oil boiler is produced by Guipeng thermal energy equipment manufacturing company Limited in Guangzhou, and the temperature of the steam can be controlled at 170 ℃.
3) And (3) drying: after granulation is finished, drying and air cooling are carried out on the compound fertilizer granules to remove water, so that the water content of the product is 1.5-2%; the drying and air cooling time is 15 minutes. The drying and air cooling are carried out by adopting a coal furnace heating and air drying machine, the air drying machine manufacturer is a white cloud environment-friendly equipment factory in Guangzhou, the model is Y160M2-2, and the power is 15 Kw.
4) And screening and inspecting the product to be qualified to obtain the product.
Claims (7)
1. A granulation method of a compound fertilizer is characterized by comprising the following steps:
1) preparing materials: weighing compound fertilizer raw materials, mixing, and uniformly stirring to obtain a compound fertilizer;
2) and (3) granulation: conveying the compound fertilizer into a granulator, and starting the granulator to granulate; then inputting starch into the granulator through an infusion pump, and simultaneously spraying water vapor into the granulator; continuously granulating for 7-8 minutes to obtain compound fertilizer granules; wherein the weight ratio of the compound fertilizer to the starch is 1000: 3-4;
3) and (3) drying: after granulation, drying and air-cooling compound fertilizer granules to remove water, and controlling the water content of the product to be 1.5-2%;
4) and screening the dried product to obtain the product.
2. The granulation method of the compound fertilizer as claimed in claim 1, wherein: in the step 1), the compound fertilizer comprises the following raw materials in parts by weight: 400 portions of ammonium chloride, 300 portions of potassium chloride and 500 portions of calcium carbonate.
3. The granulation method of the compound fertilizer as claimed in claim 2, wherein: in the step 1), the compound fertilizer comprises the following raw materials in parts by weight: 380 parts of ammonium chloride, 135 parts of potassium chloride and 485 parts of calcium carbonate.
4. The granulation method of the compound fertilizer as claimed in claim 2, wherein: in the step 1), the compound fertilizer comprises the following raw materials in parts by weight: 337 parts of ammonium chloride, 250 parts of potassium chloride and 415 parts of calcium carbonate.
5. The granulation method of the compound fertilizer as claimed in claim 1, wherein: in step 2), the granulator is a disk granulator.
6. The granulation method of the compound fertilizer as claimed in claim 1, wherein: in step 2), the temperature of the water vapor is 170 ℃.
7. The granulation method of the compound fertilizer as claimed in claim 1, wherein: in the step 3), the drying and air cooling time is 15 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811210717.3A CN111138223A (en) | 2018-10-17 | 2018-10-17 | Granulation method of compound fertilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811210717.3A CN111138223A (en) | 2018-10-17 | 2018-10-17 | Granulation method of compound fertilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111138223A true CN111138223A (en) | 2020-05-12 |
Family
ID=70515067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811210717.3A Pending CN111138223A (en) | 2018-10-17 | 2018-10-17 | Granulation method of compound fertilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111138223A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110803959A (en) * | 2019-11-29 | 2020-02-18 | 烟台市烟农富邦肥料科技有限公司 | Special granulating agent for producing round granular calcium magnesium phosphate fertilizer and application thereof |
-
2018
- 2018-10-17 CN CN201811210717.3A patent/CN111138223A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110803959A (en) * | 2019-11-29 | 2020-02-18 | 烟台市烟农富邦肥料科技有限公司 | Special granulating agent for producing round granular calcium magnesium phosphate fertilizer and application thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200512 |