Production device for granulated fertilizer coated with micro-nano mineral materials and other coating materials

Abstract

The utility model discloses a micro-nano mineral material and other coating material coated granulated fertilizer production device which comprises a rotary drum type cooler, a cold air pipe, a coating agent pipe and a powder spraying pipe, the rotary drum type cooler comprises a roller, the roller is provided with a granulated fertilizer feeding end and a granulated fertilizer outlet end, and the powder spraying pipe is connected with the cold air pipe. The cold air pipe, the coating agent pipe and the powder spraying pipe are inserted into the roller from the granular fertilizer outlet end of the roller, the roller is divided into a cooling section, a coating agent mixing section and a powder coating section, and the roller is provided with a spacer ring between the coating agent mixing section and the powder coating section. The roller cooling machine is used for coating in the later stage of granulated fertilizer production, so that the production process is simplified, the production time of the coated granulated fertilizer is saved, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of fertilizer production equipment technology, specifically to a production device for granular fertilizers coated with micro-nano mineral materials and other coating materials. Background Technology

[0002] Granular fertilizers are coated with one or more layers of film to slow down or control the rate of nutrient dissolution, allowing for slow release and improving fertilizer utilization. However, to improve soil properties, coating materials are sometimes used not only to slow down or control nutrient dissolution but also to enhance soil properties and increase mineral content. For example, the coating material can be micro / nano mineral materials or other coating materials.

[0003] Micro- and nano-mineral materials are materials processed to the micro- and nano-scale, meaning that the particle size of these mineral materials has any one dimension in three-dimensional space ranging from 1 to 100 nanometers. After modification, micro- and nano-mineral materials can be used as mineral fertilizers in agriculture. For example, a study by the Chinese Academy of Agricultural Sciences, "The Effects of Spraying Different Nanomaterials on Rice Seedling Growth and Phosphorus Absorption," showed that the combined treatment of nano-hydroxyapatite and potassium chloride can promote rice seedling growth and increase the phosphorus content of rice seedlings. Related scientific literature, such as "Research Progress on the Application of Different Nanomaterials in Nanofertilizers," reviews the application of nano-carbon, nano-metals and metal oxides, and nano-minerals in nanofertilizers and their effects on crop growth, pointing out the broad prospects of nanofertilizers.

[0004] Existing granular fertilizer coating equipment, such as the fertilizer coating machine disclosed in Chinese Patent Document CN204162627U on February 18, 2015, includes a frame, a drive motor, a reducer, and a mixing tank with a semi-circular bottom. A bare fertilizer inlet is located at the top of the mixing tank, and a coated fertilizer outlet is located at the bottom. A discharge control gate is located at the coated fertilizer outlet. A turning and stirring shaft is located inside the mixing tank, with both ends fixed in bearing seats at both ends of the mixing tank and connected to the reducer's power output shaft. A spiral turning plate is mounted on the turning and stirring shaft, and the spiral turning plate is fixed to the turning and stirring shaft by radial spokes. A coating agent spraying device is located above the spiral turning plate inside the mixing tank, along the direction of the turning and stirring shaft, and the coating agent spraying device is connected to a coating agent feeding pipeline outside the mixing tank. This type of coating equipment can only be used for liquid coating agents; it cannot coat powdered materials onto the surface of granular fertilizers. Furthermore, this coating equipment needs to be used independently; when used in conjunction with a granular fertilizer production line, it adds an extra step and increases costs.

[0005] In existing granular fertilizer production lines, after granulation, the granular fertilizer needs to be dried in a dryer, then cooled in a drum cooler before being packaged into finished products.

[0006] Using a drum-type cooling machine for coating can save time and reduce costs. Utility Model Content

[0007] In view of this, this application provides a production apparatus for coated granular fertilizer made of micro-nano mineral materials and other coating materials. The apparatus utilizes a drum cooler in the later stage of granular fertilizer production for coating, which simplifies the production process, saves production time for coated granular fertilizer, and improves production efficiency.

[0008] According to one aspect of this application, one embodiment provides a production apparatus for granular fertilizer coated with micro / nano mineral materials and other coating materials, including a rotary cooler, a cold air duct, a coating agent duct, and a powder spraying duct. The rotary cooler includes a drum with a granular fertilizer inlet and a granular fertilizer outlet. The cold air duct, the coating agent duct, and the powder spraying duct are inserted into the drum from the granular fertilizer outlet, dividing the drum into a cooling section, a coating agent mixing section, and a powder coating section. A spacer ring is provided between the coating agent mixing section and the powder coating section.

[0009] Furthermore, the rotary drum cooler also includes a drive unit that drives the drum to rotate.

[0010] Furthermore, a roller support is fixedly provided on the outer side of the roller.

[0011] Furthermore, the roller is tilted, with the granular fertilizer inlet end of the roller higher than the granular fertilizer outlet end, and the tilt degree is 0.5-10 degrees.

[0012] Furthermore, the powder spraying pipe is a pneumatic spraying pipe, and in addition to the powder pipe, the powder spraying pipe is also connected to an air pipe at the inlet, through which high-pressure air is introduced.

[0013] Furthermore, the front end of the cold air duct is provided with multiple nozzles for spraying cold air, and the nozzles are arranged downwards so that this section of the roller forms a cooling section.

[0014] Furthermore, the front end of the coating agent tube is provided with multiple spray nozzles for spraying the coating agent onto the granular fertilizer and mixing it in that area, so that this section of the roller forms a coating agent mixing section.

[0015] Furthermore, the front end of the powder spreading pipe is equipped with multiple powder nozzles for spraying powder onto the granular fertilizer with a coating agent on its surface, and then mixing it evenly to form powder-coated granular fertilizer, so that this section of the roller forms a powder coating section.

[0016] Furthermore, the roller is provided with long forward spiral blades on the inner wall of the cooling section. When the roller rotates, it pushes the granular fertilizer towards the granular fertilizer outlet. The roller is provided with multiple rows of short arc-shaped blades on the circumference of the coating agent mixing section. Each row of blades is arranged in a forward-reverse or reverse-forward pattern, with adjacent rows of blades in opposite directions. This arrangement ensures that the coating agent can be fully coated on the surface of the granular fertilizer after it is added. The roller is provided with short forward stirring blades on the inner wall of the powder coating section, and stirring teeth are provided between the forward stirring blades.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. The micro-nano mineral material and other coating material coated granular fertilizer production device of this utility model uses a drum-type cooler to coat granular fertilizer with powder, realizing multiple uses of one machine, shortening the process flow, simplifying the process, and saving costs.

[0019] 2. The micro-nano mineral material and other coating material coated granular fertilizer production device of this utility model uses a pneumatic spraying pipe for powder spraying, which can effectively avoid powder clogging and at the same time make the powder sprayed more evenly onto the granular fertilizer with coating agent on the surface, so that the surface of the granular fertilizer is evenly coated with a layer of powder. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the powder spraying pipe of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal blades of the drum of this utility model.

[0023] In the diagram: 1. Drum cooler; 11. Drum; 111. Granular fertilizer feed end; 112. Granular powder outlet end; 113. Cooling section; 114. Coating agent mixing section; 115. Powder coating section; 116. Spacer ring; 12. Drive unit; 13. Drum support; 2. Air-cooled pipe; 3. Coating agent pipe; 4. Powder spreading pipe; 41. Powder nozzle; 42. Powder inlet; 43. Air pipe. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0025] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0026] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0027] Example:

[0028] Please refer to Figure 1 One embodiment provides a production apparatus for granular fertilizer coated with micro-nano mineral materials and other coating materials, including a rotary cooler 1, a cold air pipe 2, a coating agent pipe 3, and a powder spraying pipe 4.

[0029] The rotary cooler 1 includes a drum 11 and a drive device 12. The drive device 12 drives the drum 11 to rotate. The drum 11 has a granular fertilizer inlet end 111 and a granular fertilizer outlet end 112.

[0030] The roller 11 is inclined, with the granular fertilizer inlet end 111 of the roller 11 higher than the granular fertilizer outlet end 112, and the degree of inclination is 5 degrees. A roller support 13 is fixedly installed on the outside of the roller 1.

[0031] The cold air pipe 2, the coating agent pipe 3, and the powder spraying pipe 4 are inserted into the drum 11 from the granular fertilizer outlet 112 end of the drum 11. The cold air pipe 2 is located in the center of the drum 11, and the coating agent pipe 3 and the powder spraying pipe 4 are located below the cold air pipe 1. They can be arranged side by side. Depending on the actual situation, the cold air pipe 2 is the longest, the coating agent pipe 3 is the second longest, and the powder spraying pipe 4 is the shortest.

[0032] The front end of the cold air duct 2, specifically the section longer than the coating agent duct 3, is provided with multiple nozzles for spraying cold air. The nozzles are positioned downwards, so that this section of the roller forms a cooling section 113.

[0033] The front end of the coating agent tube 3, specifically the section longer than the powder spraying tube 4, is equipped with multiple spray nozzles for spraying the coating agent onto the granular fertilizer and mixing it in this area, so that this section of the roller forms the coating agent mixing section 114.

[0034] The powder spraying pipe 4 is a pneumatic spraying pipe. In addition to the powder pipe 42, the inlet of the powder spraying pipe 4 is also connected to an air pipe 43, through which high-pressure air is introduced. The front end of the powder spraying pipe 4 is equipped with multiple powder nozzles 41, used to spray powder onto granular fertilizer with a coating agent on its surface, then mix them evenly to form powder-coated granular fertilizer, allowing this section of the roller to form a powder-coating section 115.

[0035] The inner wall of the drum 11 is provided with stirring blades. The inner wall of the cooling section 113 of the drum 11 is provided with long forward spiral blades. When the drum rotates, it pushes the granular fertilizer towards the granular fertilizer outlet. The drum 11 has multiple rows of short arc-shaped blades around the circumference of the coating agent mixing section 114. Each row of blades is arranged in a repeated forward-reverse or reverse-forward arrangement. Adjacent rows of blades are exactly opposite. This arrangement can ensure that after the coating agent is added, the coating agent can be fully coated on the surface of the granular fertilizer. The inner wall of the powder coating section 115 of the drum 11 is provided with short forward stirring blades, and stirring teeth are provided between the forward stirring blades.

[0036] The roller 11 has a spacer ring 116 between the coating agent mixing section 114 and the powder coating section 115.

[0037] This invention relates to a production device for granular fertilizer coated with micro / nano mineral materials and other coating materials. Granular fertilizer enters the drum from the feed end and moves forward as the drum rotates. It is first cooled by cold air, then sprayed with coating agent below the coating agent pipe. Rotating inside the drum, the granular fertilizer is repeatedly stirred in both forward and reverse directions by multiple rows of short, arc-shaped blades on the inner wall of the drum. The coating agent is evenly coated on the surface of each granular fertilizer. The granular fertilizer with the coating agent evenly applied passes through the partition ring and enters the powder coating section. Powder is sprayed onto the granular fertilizer, and after another rotation of the drum, the powder adheres evenly to the surface of the granular fertilizer under the action of the forward stirring blades and stirring teeth inside the drum, forming powder-coated granular fertilizer.

[0038] This utility model discloses a production device for coated granular fertilizer using micro-nano mineral materials and other coating materials. The coating agent can be water or other liquid coating agents, and the powder in the powder spraying pipe can be micro-nano mineral materials or other powders.

[0039] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A production apparatus for granular fertilizer coated with micro / nano mineral materials and other coating materials, characterized in that: The device includes a rotary cooler, a cold air duct, a coating agent duct, and a powder spraying duct. The rotary cooler includes a drum with a granular fertilizer inlet and a granular fertilizer outlet. The cold air duct, coating agent duct, and powder spraying duct are inserted into the drum from the granular fertilizer outlet, dividing the drum into a cooling section, a coating agent mixing section, and a powder coating section. A spacer ring is provided between the coating agent mixing section and the powder coating section.

2. The apparatus for producing granular fertilizer coated with micro / nano mineral materials and other coating materials according to claim 1, characterized in that: The rotary drum cooler also includes a drive unit that drives the drum to rotate.

3. The apparatus for producing granular fertilizer coated with micro / nano mineral materials and other coating materials according to claim 1, characterized in that: A roller support is fixedly installed on the outside of the roller.

4. The apparatus for producing granular fertilizer coated with micro / nano mineral materials and other coating materials according to claim 1, characterized in that: The roller is tilted, with the granular fertilizer inlet end higher than the granular fertilizer outlet end, and the tilt degree is 0.5-10 degrees.

5. The apparatus for producing granular fertilizer coated with micro / nano mineral materials and other coating materials according to claim 1, characterized in that: The powder spraying pipe is a pneumatic spraying pipe. In addition to the powder pipe, the powder spraying pipe is also connected to an air pipe at the inlet, and high-pressure air is introduced into the air pipe.

6. The apparatus for producing granular fertilizer coated with micro / nano mineral materials and other coating materials according to claim 1, characterized in that: The front end of the cold air duct is provided with multiple nozzles, which are arranged downwards.

7. The apparatus for producing granular fertilizer coated with micro / nano mineral materials and other coating materials according to claim 1, characterized in that: The front end of the coating agent tube is equipped with multiple spray nozzles.

8. The apparatus for producing granular fertilizer coated with micro / nano mineral materials and other coating materials according to claim 1, characterized in that: The front end of the powder dispensing pipe is equipped with multiple powder nozzles.

9. The apparatus for producing granular fertilizer coated with micro / nano mineral materials and other coating materials according to claim 1, characterized in that: The drum has long, forward spiral blades on the inner wall of the cooling section. When the drum rotates, it pushes the granular fertilizer toward the granular fertilizer outlet. The drum has multiple rows of short arc-shaped blades on the circumference of the coating agent mixing section. Each row of blades is arranged in a forward-reverse or reverse-forward pattern, with adjacent rows of blades in opposite directions. The drum has short, forward stirring blades on the inner wall of the powder coating section, and stirring teeth are provided between the forward stirring blades.

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