High tower nitro compound fertilizer and production process and granulator used in the process

Abstract

The high-tower nitro compound fertilizer and the production process and the granulator used in the process have the following formulas: 30-60% nitrogen source, 15-40% phosphorus source, 15-40% potassium source, 1-5% calcium powder, 0.3-5% functional additives, and 100% filler. The granulator includes: a body, a feed port is provided on the upper surface of the body, and a nozzle is installed at the bottom of the body; a stirring and cleaning mechanism, the stirring and cleaning mechanism includes a forward stirring component, a reverse stirring component and two cleaning components, the forward stirring component includes a motor fixedly connected to the upper surface of the body through a bracket, and the output end of the motor is fixedly connected to a No. 1 rotating shaft. Through the forward and reverse stirring components, the material to be granulated inside the equipment can be efficiently stirred, so that the solvent and the solute are mixed more evenly, and the attached materials on the inner wall of the equipment can be scraped off through the cleaning component, so as to realize the cleaning work of the inner wall of the equipment.

Description

Technical Field

[0001] The invention relates to the field of fertilizer production equipment, in particular to a high-tower nitro compound fertilizer and a production process thereof and a granulator with conveniently adjustable rotation speed used in the process. Background Art

[0002] The application of high-tower nitro compound fertilizer in the agricultural field has many advantages. Nitro compound fertilizer is a high-concentration compound fertilizer of N, P, and K produced by using ammonium nitrate as the nitrogen source and adding compound fertilizer raw materials such as phosphorus and potassium. The product contains both nitrate nitrogen and ammonium nitrogen. Nitro compound fertilizer is an important agricultural fertilizer, mainly suitable for economic crops such as corn, melons and fruits, vegetables, and fruit trees to increase crop yields.

[0003] The high-tower nitro compound fertilizer produced by the existing method is prone to problems such as pulverization and compaction, low fertilizer efficiency utilization rate, complex production process and low yield.

[0004] The high tower granulator is a high tower compound fertilizer production equipment. It mainly uses the melting characteristics of materials and the principle of free fall to produce granular fertilizers. Its core part is a tall granulation tower. Its uses include producing compound fertilizers and improving fertilizer performance.

[0005] After searching, the patent document with publication number CN220214832U discloses a high tower granulator, including an outer shell, a box body is fixedly installed on the inner bottom wall of the outer shell, a limit plate is fixedly installed on the inner top wall of the box body, a screw rod is arranged inside the box body, a sleeve is threadedly installed on the surface of the screw rod, the sleeve vertically moves through the limit plate, and sliding grooves are provided on the inner walls on both sides of the limit plate where the sleeve penetrates. The invention can clean the slurry at different places on the inner wall of the box body.

[0006] The existing granulators often have the following problems when used:

[0007] When the existing high-tower nitro compound fertilizer granulator is in use, since the material to be granulated has great viscosity, a large amount of material will adhere to the inner wall of the equipment after production is completed, which is not convenient for cleaning and also causes waste of resources. At the same time, when the material is waiting for granulation inside the equipment, the solvent and the solute need to be fully and evenly mixed to ensure the quality of subsequent granulation. Summary of the invention

[0008] In view of the deficiencies in the prior art, the present invention provides a high-tower nitro compound fertilizer and a production process thereof, and a granulator with conveniently adjustable rotation speed used in the process.

[0009] The embodiment of the present invention provides a high-tower nitro compound fertilizer, comprising: 30-60% nitrogen source, 15-40% phosphorus source, 15-40% potassium source, 1-5% calcium powder, 0.3-5% functional additives, and the balance of fillers is supplemented to 100%.

[0010] Preferably, the nitrogen fertilizer is ammonium nitrate phosphate, the phosphate fertilizer is one or a combination of monoammonium phosphate and diammonium phosphate, the potash fertilizer is one or a combination of potassium sulfate, potassium chloride, and potassium nitrate, the functional additive is one or a combination of polyglutamic acid, astaxanthin, 5-ALA, chitosan oligosaccharide, brown algae oligosaccharide, humic acid, alginic acid, anti-caking agent, fulvic acid, zinc, boron, manganese, silicon, molybdenum, iron, and copper, and the filler is one or a combination of talc and attapulgite.

[0011] The production process of the above-mentioned high-tower nitro compound fertilizer comprises the following steps:

[0012] Step 1: transport the nitrogen source to the melting tank in proportion and heat and melt it;

[0013] Step 2: The molten liquid in step 1 is first transported in proportion by different metering belt scales to form a mixed slurry. The mixed slurry is granulated by a granulator, cooled, and then falls into a collecting hopper to obtain coarse particles.

[0014] Step 3: transport the coarse particles in step 2 into the coating kiln, add functional additives for coating, and obtain high-tower nitro compound fertilizer after packaging.

[0015] The high-tower nitro compound fertilizer provided by the present invention has the following characteristics: first, in terms of particle characteristics, the particles are small, uniform, smooth in surface and not easy to harden, and the product quality is stable. From the perspective of nutrients, it is rich in nitrate nitrogen and ammonium nitrogen, dissolves quickly, absorbs quickly, takes effect quickly, and has uniform nutrient distribution, which significantly improves the fertilizer utilization rate, thereby achieving increased production and increased income.

[0016] Moreover, the production steps are simple, the processing is convenient, and it is suitable for mass production.

[0017] The granulator in the production process of the above-mentioned high-tower nitro-compound fertilizer includes: a body, a feed port is provided on the upper surface of the body, and a nozzle is installed at the bottom of the body; a stirring and cleaning mechanism, the stirring and cleaning mechanism includes a forward stirring component, a reverse stirring component and two cleaning components, the forward stirring component includes a motor fixedly connected to the upper surface of the body through a bracket, the output end of the motor is fixedly connected to a No. 1 rotating shaft, the bottom end of the No. 1 rotating shaft is rotatably connected to the upper surface of the body through a bearing, a cylinder is provided in the body, and the cylinder is rotatably connected to the upper surface of the body through a bearing, the No. 1 rotating shaft is circumferentially fixedly connected to a No. 1 gear, the No. 2 gear is circumferentially fixedly connected to the cylinder, the No. 1 gear is meshed with the No. 2 gear, the side wall of the bottom of the cylinder is fixedly connected to two bearing plates, and the bottom surfaces of the two bearing plates are fixedly connected to a No. 1 stirring rod.

[0018] Furthermore, the reverse stirring assembly includes a No. 2 rotating shaft arranged in the body, the No. 2 rotating shaft is rotatably connected to the upper surface of the cylinder through a bearing, the No. 1 rotating shaft is circumferentially fixedly connected with a driving wheel, the No. 2 rotating shaft is circumferentially fixedly connected with a driven wheel, a belt is sleeved between the driving wheel and the driven wheel, and the No. 2 rotating shaft is circumferentially fixedly connected with a plurality of No. 2 stirring rods.

[0019] Furthermore, the cleaning assembly includes a mounting plate fixedly connected to the bottom surface of the supporting plate, a scraper is provided on the side of the mounting plate, and the side wall of the scraper is fixedly connected to two guide rods, both of which penetrate and are slidably connected to the side wall of the mounting plate, and both of the scrapers are located in the machine body, and the side walls of the two scrapers that are away from each other are in contact with the inner wall of the machine body. Two springs are fixedly connected between the side wall of the supporting plate and the side wall of the mounting plate.

[0020] Furthermore, the first gear and the second gear are both located outside the body, and the diameter of the first gear is the same as the diameter of the second gear.

[0021] Furthermore, the driving wheel and the driven wheel are both located outside the body, and the diameter of the driving wheel is greater than the diameter of the driven wheel.

[0022] Furthermore, the two scrapers are both located in the machine body, and the side walls of the two scrapers that are away from each other are both in contact with the inner wall of the machine body.

[0023] Compared with the prior art, the above granulator has the following beneficial effects:

[0024] By setting up the forward stirring component and the reverse stirring component, the material to be granulated inside the equipment can be efficiently stirred, so that the solvent and the solute are mixed more evenly, which is beneficial to improving the quality of subsequent granulation. By setting up the cleaning component, the power of the forward stirring component is utilized to scrape off the attachments on the inner wall of the equipment, thereby realizing the cleaning work of the inner wall of the equipment, which is more practical and can also reduce the waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structural analysis of a high-tower granulator for conveniently adjusting the rotation speed of a high-tower nitro-compound fertilizer described in an embodiment of the present invention.

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure analysis from another perspective of a high-tower granulator for conveniently adjusting the rotation speed of a high-tower nitro-compound fertilizer described in an embodiment of the present invention.

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of a high-tower granulator for conveniently adjusting the rotation speed of a high-tower nitro-compound fertilizer described in an embodiment of the present invention.

[0028] In the above drawings: 1 body, 2 feed port, 3 nozzle, 4 motor, 5 No. 1 rotating shaft, 6 cylinder, 7 No. 1 gear, 8 No. 2 gear, 9 bearing plate, 10 No. 1 stirring rod, 11 No. 2 rotating shaft, 12 driving wheel, 13 driven wheel, 14 belt, 15 No. 2 stirring rod, 16 mounting plate, 17 scraper, 18 guide rod, 19 spring. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] Example 1

[0031] A high-tower nitro compound fertilizer, comprising: 30% nitrogen source, 20% phosphorus source, 30% potassium source, 5% calcium powder, 3% functional additives, and the rest of the filler is supplemented to 100%;

[0032] Preferably, the nitrogen fertilizer is ammonium nitrate phosphate; the phosphorus fertilizer is monoammonium phosphate; the potash fertilizer is potassium sulfate; the functional additive is a combination of polyglutamic acid, 5-ALA, humic acid, anti-caking agent, zinc and boron; and the filler is a combination of talcum powder.

[0033] Preferably, the production process of the high-tower nitro compound fertilizer comprises the following steps:

[0034] Step 1: transport the nitrogen source to the melting tank in proportion and heat and melt it;

[0035] Step 2: The molten liquid in step 1 is first transported in proportion by different metering belt scales to form a mixed slurry. The mixed slurry is granulated by a granulator, cooled, and then falls into a collecting hopper to obtain coarse particles.

[0036] Step 3: transport the coarse particles in step 2 into the coating kiln, add functional additives for coating, and obtain high-tower nitro compound fertilizer after packaging.

[0037] Example 2

[0038] A high-tower nitro compound fertilizer, comprising: 60% nitrogen source, 15% phosphorus source, 15% potassium source, 1% calcium powder, 3% functional additives, and the rest of the filler is supplemented to 100%;

[0039] Preferably, the nitrogen fertilizer is ammonium nitrate phosphate; the phosphorus fertilizer is diammonium phosphate; the potash fertilizer is potassium sulfate; the functional additive is a combination of 5-ALA, brown algae oligosaccharides, anti-caking agents, fulvic acid, zinc, boron, silicon, and molybdenum; and the filler is attapulgite.

[0040] Preferably, the production process of the high-tower nitro compound fertilizer comprises the following steps:

[0041] Step 1: transport the nitrogen source to the melting tank in proportion and heat and melt it;

[0042] Step 2: The molten liquid in step 1 is first transported in proportion by different metering belt scales to form a mixed slurry. The mixed slurry is granulated by a granulator, cooled, and then falls into a collecting hopper to obtain coarse particles.

[0043] Step 3: transport the coarse particles in step 2 into the coating kiln, add functional additives for coating, and obtain high-tower nitro compound fertilizer after packaging.

[0044] Example 3

[0045] like Figure 1-Figure 3 As shown, the present invention proposes a high-tower nitro compound fertilizer granulator with convenient rotation speed adjustment, comprising:

[0046] The machine body 1 is provided with a feed port 2 on the upper surface of the machine body 1, and a nozzle 3 is installed at the bottom of the machine body 1. The nozzle 3 has a separate power output to drive it, and its rotation speed is controlled by a variable frequency speed regulator. The rotation speed of the nozzle 3 can be changed by changing the power supply frequency, thereby realizing convenient adjustment. When it is necessary to produce particles of different sizes, it can be achieved by adjusting the rotation speed. The greater the rotation speed, the smaller the particles. The stirring and cleaning mechanism includes a forward stirring component, a reverse stirring component and two cleaning components. The forward stirring component includes a motor 4 fixedly connected to the upper surface of the machine body 1 through a bracket. The output end of the motor 4 is fixedly connected to a No. 1 rotating shaft 5. The bottom end of the No. 1 rotating shaft 5 is rotatably connected to the upper surface of the machine body 1 through a bearing. A cylinder 6 is provided in the machine body 1. The cylinder 6 is rotatably connected to the upper surface of the machine body 1 through a bearing. The No. 1 rotating shaft 5 is circumferentially fixedly connected to a No. 1 gear 7. The body 6 is circumferentially fixedly connected with a No. 2 gear 8, and the No. 1 gear 7 is meshed with the No. 2 gear 8. The side wall of the bottom of the cylinder 6 is fixedly connected with two bearing plates 9, and the bottom surfaces of the two bearing plates 9 are fixedly connected with a No. 1 stirring rod 10. The cleaning assembly includes a mounting plate 16 fixedly connected to the bottom surface of the bearing plate 9, and a scraper 17 is provided on the side of the mounting plate 16. The side wall of the scraper 17 is fixedly connected with two guide rods 18, and the two guide rods 18 are both slidably connected to the side wall of the mounting plate 16. Two springs 19 are fixedly connected between the side wall of the bearing plate 9 and the side wall of the mounting plate 16. The No. 1 gear 7 and the No. 2 gear 8 are both located outside the body 1, and the diameter of the No. 1 gear 7 is the same as that of the No. 2 gear 8. The two scrapers 17 are both located inside the body 1, and the side walls of the two scrapers 17 that are away from each other are in contact with the inner wall of the body 1, and the attachments on the inner wall of the equipment are scraped off by the two scrapers 17;

[0047] The reverse stirring assembly includes a No. 2 rotating shaft 11 arranged in the body 1, and the No. 2 rotating shaft 11 is rotatably connected to the upper surface of the cylinder 6 through a bearing. The No. 1 rotating shaft 5 is fixedly connected to a driving wheel 12 in the circumference, and the No. 2 rotating shaft 11 is fixedly connected to a driven wheel 13 in the circumference. A belt 14 is sleeved between the driving wheel 12 and the driven wheel 13. A plurality of No. 2 stirring rods 15 are fixedly connected to the No. 2 rotating shaft 11 at equal intervals in the circumference. The driving wheel 12 and the driven wheel 13 are both located outside the body 1, and the diameter of the driving wheel 12 is larger than the diameter of the driven wheel 13.

[0048] The detailed working process of the present invention is as follows:

[0049] When in use, the material is added into the machine body 1 through the feed port 2, and then flows into the nozzle 3 to be sprayed out. After cooling and solidification, particles are formed, and granulation is completed. The material is added into the machine body 1. In order to ensure the quality of the product, it needs to be mixed sufficiently and evenly. At this time, it can be stirred by the forward stirring component and the reverse stirring component. The motor 4 is started, and the motor 4 drives the No. 1 rotating shaft 5 to rotate, and then drives the No. 1 gear 7 to rotate. The rotation of the No. 1 gear 7 will drive the No. 2 gear 8 and the cylinder 6 to rotate through meshing transmission. The rotation of the cylinder 6 drives the two The carrier plate 9 and the No. 1 stirring rod 10 revolve, and stirring is achieved through the two rotating No. 1 stirring rods 10. The rotation of the No. 1 rotating shaft 5 will also drive the driving wheel 12 to rotate. The driving wheel 12 rotates through the transmission of the belt 14 to drive the driven wheel 13 and the No. 2 rotating shaft 11 to rotate. The rotation of the No. 2 rotating shaft 11 drives multiple No. 2 stirring rods 15 to revolve to achieve stirring. The No. 1 stirring rod 10 rotates in opposite directions to the No. 2 stirring rod 15. The stirring efficiency is improved through the two-way stirring measure, and the materials can be mixed more evenly and fully.

[0050] The revolution of the bearing plate 9 will drive the mounting plate 16 to revolve, and then drive the scraper 17 to revolve through the guide rod 18 and the spring 19. Under the action of the two springs 19, the scraper 17 will always fit the inner wall of the body 1, and then the material attached to the inner wall of the body 1 can be scraped off, which is convenient for subsequent cleaning and can also reduce the waste of resources. The high tower nitro compound fertilizer G3 is obtained by granulation by the above granulator.

[0051] Comparative Example

[0052] The raw materials used are the same as those in Example 3, and the granulator used in Example 3 is not used in the granulation process, but a conventional granulator is used to obtain comparative fertilizer D1.

[0053] 1. Evaluation test (screening test):

[0054] 1) Test purpose: To understand the particle size of fertilizer particles;

[0055] 2) Experimental fertilizer: high tower nitro compound fertilizer G3 of Example 3 and control fertilizer D1 were selected;

[0056] 3) Test method: Select the continuous production granulation process for 1 hour, and then sieve the fertilizer with 1.00mm~4.75mm at the discharge port according to "Compound Fertilizer" GB / T15063-2020. Repeat the test 5 times for each process. The return rate = return amount / feed amount. The return rate results of different production processes are shown in Table 1.

[0057] Table 1 Return rate of different processes

[0058]

[0059]

[0060] 2. Evaluation test (cleaning time):

[0061] 1) Test purpose: To understand the cleaning time of the high tower workshop;

[0062] 2) Experimental equipment: Select the granulator of Example 3 and the granulator of Comparative Example 1;

[0063] 3) Test method: Record the time of cleaning the high tower wall materials due to shutdown within 1 year when the high tower workshop uses the granulator of Example 3 and the granulator of Comparative Example 1 to produce the corresponding products. The cleaning time of different granulators is shown in Table 2.

[0064] Table 2 Cleaning time of different granulators

[0065] Serial number Granulator Machine cleaning time / day 1 Example 3 1.4 2 Comparative Example 1 9.1

[0066] As can be seen from Table 1, the return rate of the high-tower nitro-compound fertilizer produced in Example 3 is significantly lower than that in Comparative Example 1; as can be seen from Table 2, Example 3 is produced using a high-tower granulator, and the high-tower wall material cleaning time is significantly lower than that in Comparative Example 1. The high-tower nitro-compound fertilizer and granulator provided by the present invention can improve particle quality and granulation efficiency.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. High tower nitro compound fertilizer, characterized in that: include: 30-60% nitrogen source, 15-40% phosphorus source, 15-40% potassium source, 1-5% calcium powder, 0.3-5% functional additives, and the rest of the filler is supplemented to 100%.

2. The high tower nitro compound fertilizer according to claim 1, characterized in that: The nitrogen fertilizer is ammonium nitrate phosphate, the phosphate fertilizer is one or a combination of monoammonium phosphate and diammonium phosphate, the potash fertilizer is one or a combination of potassium sulfate, potassium chloride, and potassium nitrate, the functional additive is one or a combination of polyglutamic acid, astaxanthin, 5-ALA, chitosan oligosaccharide, brown algae oligosaccharide, humic acid, alginic acid, anti-caking agent, fulvic acid, zinc, boron, manganese, silicon, molybdenum, iron, and copper, and the filler is one or a combination of talc and attapulgite.

3. The production process of the high tower nitro compound fertilizer according to any one of claims 1 or 2, comprising the following steps: Step 1: transport the nitrogen source to the melting tank in proportion and heat and melt it; Step 2: The molten liquid in step 1 is first transported in proportion by different metering belt scales to form a mixed slurry. The mixed slurry is granulated by a granulator, cooled, and then falls into a collecting hopper to obtain coarse particles. Step 3: transport the coarse particles in step 2 into the coating kiln, add functional additives for coating, and obtain high-tower nitro compound fertilizer after packaging.

4. The granulator in the production process of the high tower nitro compound fertilizer according to claim 3, characterized in that: include: A machine body (1), wherein a feed inlet (2) is provided on the upper surface of the machine body (1), and a nozzle (3) is installed at the bottom of the machine body (1); A stirring and cleaning mechanism, the stirring and cleaning mechanism comprises a forward stirring component, a reverse stirring component and two cleaning components, the forward stirring component comprises a motor (4) fixedly connected to the upper surface of a machine body (1) through a bracket, the output end of the motor (4) is fixedly connected to a first rotating shaft (5), the bottom end of the first rotating shaft (5) is rotatably connected to the upper surface of the machine body (1) through a bearing, a cylinder (6) is provided inside the machine body (1), the cylinder (6) is rotatably connected to the upper surface of the machine body (1) through a bearing, the circumference of the first rotating shaft (5) is fixedly connected to a first gear (7), the circumference of the cylinder (6) is fixedly connected to a second gear (8), the first gear (7) is meshed with the second gear (8), the side wall of the bottom of the cylinder (6) is fixedly connected to two bearing plates (9), the bottom surfaces of the two bearing plates (9) are fixedly connected to a first stirring rod (10).

5. The granulator in the production process of high-tower nitro-compound fertilizer according to claim 4, characterized in that: in: The reverse stirring assembly comprises a second rotating shaft (11) arranged in the machine body (1), the second rotating shaft (11) being rotatably connected to the upper surface of the cylinder (6) through a bearing, the first rotating shaft (5) being fixedly connected to a driving wheel (12) in the circumferential direction, the second rotating shaft (11) being fixedly connected to a driven wheel (13) in the circumferential direction, a belt (14) being sleeved between the driving wheel (12) and the driven wheel (13), and a plurality of second stirring rods (15) being fixedly connected to the second rotating shaft (11) at equal intervals in the circumferential direction.

6. The granulator in the production process of high-tower nitro compound fertilizer according to claim 4, characterized in that: in: The cleaning assembly comprises a mounting plate (16) fixedly connected to the bottom surface of a carrying plate (9); a scraper (17) is provided on the side of the mounting plate (16); two guide rods (18) are fixedly connected to the side wall of the scraper (17); the two guide rods (18) are both slidably connected to the side wall of the mounting plate (16); and two springs (19) are fixedly connected between the side wall of the carrying plate (9) and the side wall of the mounting plate (16).

7. The granulator in the production process of high-tower nitro-compound fertilizer according to claim 4, characterized in that: in: The first gear (7) and the second gear (8) are both located outside the machine body (1), and the diameter of the first gear (7) is the same as the diameter of the second gear (8).

8. The granulator in the production process of high-tower nitro compound fertilizer according to claim 5, characterized in that: in: The driving wheel (12) and the driven wheel (13) are both located outside the machine body (1), and the diameter of the driving wheel (12) is greater than the diameter of the driven wheel (13).

9. The granulator in the production process of high-tower nitro compound fertilizer according to claim 6, characterized in that: in: The two scrapers (17) are both located inside the machine body (1), and the side walls of the two scrapers (17) that are away from each other are both in contact with the inner wall of the machine body (1).

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