A kind of air-cooled spreading heat dissipation device for finished fertilizer

Abstract

This invention discloses a wind-cooled spreading and heat dissipation device for finished fertilizer. The wind hood is configured in an "[" shape. Several heat dissipation pipes parallel to the hood's axis are arranged on the inner top of the wind hood. Several heat dissipation nozzles are installed on each heat dissipation pipe. One end of each heat dissipation pipe is connected in series with a fan via an air supply pipe. Air collecting pipes parallel to the hood's axis are respectively arranged on the upper part of the outer walls of both sides of the wind hood. Several exhaust pipes are installed on each air collecting pipe, connecting to the inside of the wind hood. Two guide side plates are arranged in a V-shape. A scraper plate is installed at the middle of the front end of the two guide side plates. The rear end of the scraper plate extends obliquely downward to the bottom edge of the guide side plate, and the angle between the scraper plate and the bottom edge of the guide side plate is acute. A connecting plate is installed between the tops of the two guide side plates, and a connector is installed on the top of the connecting plate to connect to the inner top of the wind hood. This invention can meet the continuous cooling requirements during large-scale fertilizer production, greatly improving the quality stability of fertilizer during subsequent storage or use.

Description

Technical Field

[0001] This invention belongs to the field of fertilizer production technology, and in particular relates to an air-cooled spreading and heat dissipation device for finished fertilizer. Background Technology

[0002] After granulation, fertilizers need to undergo drying to become finished products. The drying temperature is typically 70-90℃, so freshly produced fertilizers are still warm, around 50-70℃, which is relatively high compared to room temperature. Studies have found that excessively high temperatures can lead to fertilizer caking, loss of effective components, and pulverization of fertilizer particles, among other quality problems. Therefore, cooling is necessary before packaging; otherwise, the stability of fertilizer quality will be severely affected. Traditionally, fertilizer cooling methods involve installing cold air cooling devices at both the inlet and outlet of the packaging screen for centralized cooling. This method only meets the cooling needs of small-batch production. With larger production volumes, cooling may not be timely, and the fertilizer temperature may not reach the required level for packaging, leading to quality problems during subsequent storage or use. Another cooling method is to extend the conveyor belt of the finished fertilizer product to increase the time that the finished fertilizer product is in contact with room temperature air on the conveyor belt, thereby increasing the natural cooling time. However, this method requires a large enough site and space to be implemented, and its operability is not strong.

[0003] Therefore, developing a space-saving device that can improve the heat dissipation of finished fertilizer is the key to solving the problem. Summary of the Invention

[0004] The present invention provides a wind-cooled spreading and heat dissipation device for finished fertilizer.

[0005] This invention is achieved through the following technical solution: It includes a fan shroud, heat dissipation pipes, air collection pipes, a guide side plate, a scraper plate, and connectors. The fan shroud is configured in a "[" shape. A mounting rod is installed on the outer top of the fan shroud. Several heat dissipation pipes parallel to their center lines are installed on the inner top of the fan shroud. Several heat dissipation nozzles are installed on each heat dissipation pipe. One end of each heat dissipation pipe is connected in series with a fan via an air supply pipe, and the other end is sealed. Air collection pipes parallel to their center lines are respectively installed on the outer walls of both sides of the fan shroud. The air duct has several rows of air ducts connected to the inside of the ventilation hood. The material guide side plate has two pieces with an eight-shaped structure. A scraper plate is set at the middle of the front end of the two material guide side plates. The width of the two material guide side plates is smaller than the distance between the two side walls of the ventilation hood. The rear end of the scraper plate extends obliquely downward to the bottom edge of the material guide side plate, and the angle between the scraper plate and the bottom edge of the material guide side plate is an acute angle. A connecting plate is set between the top of the two material guide side plates. A connector is set on the top of the connecting plate. The connector is connected to the inner top of the ventilation hood.

[0006] Furthermore, there are at least two heat dissipation pipes, and the heat dissipation nozzles on adjacent heat dissipation pipes are staggered. The heat dissipation pipe is a tapered pipe, with its large-diameter end connected to the air supply pipe and its small-diameter end sealed. The ratio of the inner diameter of the large-diameter end to the small-diameter end of the heat dissipation pipe is 1:0.4~0.8.

[0007] Furthermore, the heat dissipation pipe includes a constant air duct, a pressure pipe, and a partition plate. The constant air duct is arranged in a semi-conical structure along its length, and the pressure pipe is arranged in a U-shaped structure with an open top in its cross-section. The constant air duct is arranged on the upper surface of the partition plate, and the pressure pipe is arranged on the lower surface of the partition plate. The constant air duct and the pressure pipe are coaxial. Several partition plates are provided on the pressure pipe, and the partition plates divide the internal space of the pressure pipe into several pressure regulating air chambers. Heat dissipation nozzles are provided at the bottom of each pressure regulating air chamber, and several air holes are provided at the top of each pressure regulating air chamber, i.e., on the partition plate, to connect to the constant air duct.

[0008] The beneficial effects of the present invention are: 1. In view of the shortcomings of the prior art, without changing the current cooling device and conveyor belt, an air-cooled material spreading heat dissipation device is added to the conveyor belt. The use is not limited by the site space, meets the continuous cooling needs during large-scale fertilizer production, has low cost, and has a significant cooling and heat dissipation effect, and is suitable for industrial continuous production.

[0009] 2. Based on the cooling effect of conveying cold air, the fertilizer on the conveyor belt is turned over to dissipate heat, which greatly increases the contact area between the fertilizer and the ambient air. This effectively improves the cooling speed and effect of the fertilizer during the conveyor belt process, and solves the problem that the fertilizer temperature cannot be reduced to the temperature required for packaging due to the lack of timely cooling in the existing technology. It not only has a good cooling effect and fast speed, but also facilitates subsequent packaging, which greatly improves the quality stability of the fertilizer during subsequent storage or use.

[0010] 3. The air mixed with fertilizer dust after cooling can be recycled and treated, avoiding waste and pollution of the environment and air. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention;

[0012] Figure 2 This is a top view of the heat pipe structure within the shroud.

[0013] Figure 3 This is a schematic diagram of the heat dissipation pipe structure in this invention;

[0014] Figure 4 This is a schematic diagram of the cross-sectional structure of the heat dissipation pipe in this invention;

[0015] Figure 5 This is a schematic diagram of the structure of the guide plate and the scraper plate in this invention;

[0016] Figure 6 This is a top view schematic diagram of the guide side plate and the scraper plate;

[0017] Figure 7 This is a schematic diagram of the material scraper plate in this invention;

[0018] Figure 8 This is an exploded view of the connector in this invention;

[0019] Numbering in the diagram: 1~Fan cover, 2~Heat dissipation pipe, 3~Heat dissipation nozzle, 4~Air supply pipe, 5~Exhaust pipe, 6~Air collection pipe, 7~Guard plate, 8~Filter screen, 9~Baffle, 10~Constant air duct, 11~Pressure pipe, 12~Divider plate, 13~Partition plate, 14~Pressure regulating chamber, 15~Air hole, 16~Guide side plate, 17~Shovel plate, 18~Adjusting rod, 19~Locking nut, 20~Connecting plate, 21~Connector, 22~Lower sleeve, 23~Limiting hole group, 24~Support rod, 25~Bolt, 26~Limiting rod, 27~Upper sleeve, 28~Slide groove, 29~Spring, 30~Limiting plate, 31~Rubber layer, 32~Conveyor belt, 33~Mounting rod. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the specific embodiments are described in detail below with reference to the accompanying drawings.

[0021] like Figures 1-8 The air-cooled spreading and heat dissipation device for finished fertilizer shown includes a hood 1, heat dissipation pipes 2, air collecting pipes 6, a guide side plate 16, a shovel plate 17, and a connector 21. The hood 1 is configured in a "[" shape. A mounting rod 33 is provided on the top outer side of the hood 1. Several heat dissipation pipes 2 are provided parallel to their axis on the top inner side of the hood 1. Several heat dissipation nozzles 3 are provided on each heat dissipation pipe 2. One end of each heat dissipation pipe 2 is connected to a fan via an air supply pipe 4, and the other end is sealed. Air collecting pipes 6 are provided parallel to their axis on the outer side walls of the hood 1. Several exhaust pipes 5 are provided on each air collecting pipe 6 to connect to the inside of the hood 1. The guide side plate 16 is octagonal. The structure consists of two parts. A scraper plate 17 is set at the middle of the front end of the two guide side plates 16. The width of the two guide side plates 16 is less than the distance between the two side walls of the hood 1. The rear end of the scraper plate 17 extends obliquely downward to the bottom edge of the guide side plate 16, and the angle between the scraper plate 17 and the bottom edge of the guide side plate 16 is an acute angle. A connecting plate 20 is set between the tops of the two guide side plates 16. A connector 21 is set on the top of the connecting plate 20. The connector 21 is connected to the middle section of the inner top of the hood 1, or to the front and rear sections of the inner top of the hood 1. That is, the guide side plates 16 and the scraper plate 17 are respectively set in the front and rear sections of the hood 1, or in the middle section of the hood 1, through the connector 21.

[0022] There are at least two heat dissipation pipes 2, and the heat dissipation nozzles 3 on adjacent heat dissipation pipes 2 are staggered to allow the blown cold air to contact the fertilizer more evenly for cooling. The heat dissipation pipe 2 is a tapered pipe with its large-diameter end connected to the air supply pipe 4 and its small-diameter end sealed. The ratio of the inner diameter of the large-diameter end to the small-diameter end of the heat dissipation pipe 2 is 1:0.4~0.8 to reduce the air pressure loss in the heat dissipation pipe 2 and ensure that the heat dissipation nozzle 3 at the small-diameter end of the heat dissipation pipe 2 can blow out a sufficient amount of cold air.

[0023] The heat dissipation pipe 2 includes a constant air duct 10, a pressure pipe 11, and a partition plate 12. The constant air duct 10 is arranged in a semi-conical structure along its length. The conical pipe is divided into two equal parts, and one part is taken to obtain the semi-conical constant air duct 10. This structure reduces air pressure loss in the heat dissipation pipe 2, allowing cool air to be delivered relatively evenly to the end of the heat dissipation pipe 2. The pressure pipe 11 has a U-shaped cross-section with an open top. The constant air duct 10 is located on the upper surface of the partition plate 12, and the pressure pipe 11 is located on the lower surface of the partition plate 12. The constant air duct 10 and the pressure pipe 11 are coaxial. The partition plate secures the constant air duct 10 and the pressure pipe 11. The pressure pipe 11 is connected to several baffles 13, which divide the internal space of the pressure pipe 11 into several pressure regulating air chambers 14. The pressure regulating air chambers 14 are set to buffer the wind and reduce the wind pressure blown towards the fertilizer, so as to prevent the fertilizer from being blown into the air or splashing due to excessive wind force. A heat dissipation nozzle 3 is set at the bottom of each pressure regulating air chamber 14, and several air holes 15 are set at the top of each pressure regulating air chamber 14, i.e., on the partition plate 12, to connect to the constant air pipe 10. The cold air generated by the fan is delivered to the constant air pipe 10, and then enters each pressure regulating air chamber 14 through the through holes set on the partition plate 12. Finally, it is blown into the air cover 1 by the heat dissipation nozzle 3 to cool the fertilizer.

[0024] The width of the hood 1, i.e. the distance between the two side walls of the hood 1, is greater than the width of the conveyor belt 32. Each side wall of the hood 1 is provided with a guard plate 7 perpendicular to it. The guard plate 7 is connected to the side wall to form an L-shaped structure, which reduces the amount of wind carrying fertilizer dust discharged from each side wall of the hood 1 and the edge of the conveyor belt 32, and prevents fertilizer from falling out of the conveyor belt 32 under the blowing action of the wind.

[0025] The connecting component 21 includes a lower sleeve 22, a support rod 24, an upper sleeve 27, and a spring 29. The lower end of the support rod 24 is coaxially disposed in the lower sleeve 22, and the lower end of the support rod 24 has a through hole. The upper part of the lower sleeve 22 is provided with at least two limiting hole groups 23 from bottom to top. Any limiting hole group 23 is connected to the through hole by a bolt 25. The upper end of the support rod 24 is coaxially disposed in the upper sleeve 27, and the top of the support rod 24 is provided with at least three outwardly protruding limiting rods 26. The lower part to the middle part of the upper sleeve 27 is provided with a sliding groove 28 corresponding to each limiting rod 26, and the limiting rod 26 is disposed in the sliding groove 28. The spring 29 is coaxially disposed on the upper sleeve 27, and its lower end presses on each limiting rod 26. Its top is flush with the upper sleeve 27. A limiting plate 30 is provided on the top of the upper sleeve 27 to press the spring 29. The limiting plate 30 is fixedly connected to the inner top of the hood 1.

[0026] The material scraper plate 17 is provided with adjusting rods 18 on both sides of the middle part. Each material guide side plate 16 is provided with a through hole corresponding to the adjusting rod 18. The adjusting rod 18 is provided in the through hole to connect the material scraper plate 17 and the material guide side plate 16. A locking nut 19 is provided at the outer end of each adjusting rod 18. Rotating the adjusting rod 18 can adjust the tilt angle of the material scraper plate 17. The locking nut 19 locks the adjusting rod 18 on the material guide side plate 16 to fix the tilt angle of the material scraper plate 17.

[0027] The material shovel plate 17 is configured in a J-shape, and the arc structure makes it easier to guide loose materials. A rubber layer 31 is wrapped around the lower part of the material shovel plate 17 to provide protection and reduce wear with the fertilizer conveyor belt 32.

[0028] The exhaust pipe 5 has a filter screen 8 at one end of its air inlet.

[0029] Each of the aforementioned limiting hole groups 23 includes two through holes arranged opposite to each other.

[0030] The upper part of the front and rear ends of the wind hood 1 is respectively provided with baffles 9. The baffles 9 reduce the amount of air carrying fertilizer dust blown out from the front and rear ends of the wind hood 1, increase the amount of air discharged from the exhaust pipe 5, and also prevent the fertilizer from being blocked by the baffles 9 during the transportation process.

[0031] The air collection pipe 6 is connected to an exhaust fan via a pipe. The exhaust fan draws air from the air collection pipe 6 to ensure that the air that has undergone heat exchange inside the air hood 1 can be discharged from the exhaust pipe 5.

[0032] The working method of this invention is as follows: According to the requirements, several gantry frames are set on the conveyor belt 32. A wind cover 1 is set on any one or two gantry frames through the mounting rod 33. One or more wind covers 1 can be set on the conveyor belt 32. The wind cover 1 is placed on the conveyor belt 32. Then, the contact distance between the material side plate, the scraper plate 17 and the conveyor belt 32 is adjusted so that the bottom edge of the scraper plate 17 and the two guide side plates 16 contacts the conveyor belt 32. The guard plate 7 is adjusted to be below the conveyor belt 32, and the side wall of the guard plate 7 and the wind cover 1 are respectively left with gaps with the lower surface of the conveyor belt 32, thereby forming a layout in which the conveyor belt 32 passes through the wind cover 1 to ensure that the operation of the conveyor belt 32 is not disturbed.

[0033] During the fertilizer conveying process, the fertilizer comes into contact with the shovel plate 17. Under the combined action of the fertilizer conveying and the shovel plate 17, the fertilizer moves obliquely upward along the shovel plate 17 and then falls from the top of the shovel plate 17 onto the fertilizer conveyor belt 32, thus spreading and dispersing the fertilizer, increasing the contact between the fertilizer and the ambient temperature air, and improving the cooling effect. The blower delivers cold air to each heat dissipation pipe 2 through the air supply pipe 4, and then blows it onto the fertilizer through the heat dissipation nozzles 3, cooling the fertilizer along with it. After cooling and heat exchange... The air carrying fertilizer dust is discharged through the exhaust pipe 5 and collected in the collection pipe 6. Under the suction of the exhaust fan, it is transported to the dust collector for treatment to avoid waste and environmental pollution. During the above-mentioned scattering process, the spring 29 pushes the support rod 24 downward, solving the problem of damage caused by hard contact between the guide side plate 16, the shovel plate 17 and the fertilizer conveyor belt 32. Through the elasticity of the spring 29, the guide side plate 16, the shovel plate 17 and the fertilizer conveyor belt 32 make soft contact, providing protection for all three.

Claims

1. A wind-cooled spreading and heat dissipation device for finished fertilizer, characterized in that: The device includes a hood (1), heat dissipation pipes (2), air collection pipes (6), a guide side plate (16), a scraper plate (17), and connectors (21). The hood (1) is configured in a "[" shape. Several heat dissipation pipes (2) parallel to their axis are provided on the inner top of the hood (1). Several heat dissipation nozzles (3) are provided on each heat dissipation pipe (2). One end of each heat dissipation pipe (2) is connected to the fan in series through an air supply pipe (4), and the other end is sealed. Air collection pipes (6) parallel to their axis are respectively provided on the outer walls of both sides of the hood (1). Several exhaust pipes (5) are provided on each air collection pipe (6) to connect to the fan. Inside the hood (1), two guide side plates (16) are arranged in a figure-eight shape. A scraper plate (17) is set at the middle of the front end of the two guide side plates (16). The width of the two guide side plates (16) is less than the distance between the two side walls of the hood (1). The rear end of the scraper plate (17) extends obliquely downward to the bottom edge of the guide side plate (16), and the angle between the scraper plate (17) and the bottom edge of the guide side plate (16) is an acute angle. A connecting plate (20) is set between the tops of the two guide side plates (16). A connector (21) is set on the top of the connecting plate (20). The connector (21) is connected to the inner top of the hood (1). The heat dissipation pipe (2) includes a constant air pipe (10), a pressure pipe (11), and a partition plate (12). The constant air pipe (10) is arranged in a semi-conical structure along its length. The pressure pipe (11) is arranged in a U-shaped structure with an open top in its cross-section. The constant air pipe (10) is arranged on the upper surface of the partition plate (12), and the pressure pipe (11) is arranged on the lower surface of the partition plate (12). The constant air pipe (10) and the pressure pipe (11) are coaxial. Several partition plates (13) are provided on the pressure pipe (11). The partition plates (13) divide the internal space of the pressure pipe (11) into several pressure regulating air chambers (14). Heat dissipation nozzles (3) are provided at the bottom of each pressure regulating air chamber (14). Several air holes (15) are provided at the top of each pressure regulating air chamber (14), i.e., on the partition plate (12), to connect to the constant air pipe (10).

2. The air-cooled spreading and heat dissipation device for finished fertilizer according to claim 1, characterized in that: There are at least two heat dissipation pipes (2), and the heat dissipation nozzles (3) on the two adjacent heat dissipation pipes (2) are staggered. The heat dissipation pipe (2) is a tapered pipe with its large diameter end connected to the air supply pipe (4) and its small diameter end sealed. The ratio of the inner diameter of the large diameter end to the small diameter end of the heat dissipation pipe (2) is 1:0.4~0.

8.

3. The air-cooled spreading and heat dissipation device for finished fertilizer according to claim 1, characterized in that: The connecting component (21) includes a lower sleeve (22), a support rod (24), an upper sleeve (27), and a spring (29). The lower end of the support rod (24) is coaxially disposed in the lower sleeve (22), and the lower end of the support rod (24) is provided with a through hole. The upper part of the lower sleeve (22) is provided with at least two limiting hole groups (23) from bottom to top. Any limiting hole group (23) is connected to the through hole by a bolt (25). The upper end of the support rod (24) is coaxially disposed in the upper sleeve (27). The top of the support rod (24) is provided with at least three protruding limiting rods (26). The upper sleeve (27) is provided with a sliding groove (28) corresponding to each limiting rod (26) from the lower to the middle part. The limiting rod (26) is located in the sliding groove (28). The spring (29) is coaxially located on the upper sleeve (27). Its lower end presses on each limiting rod (26), and its top is flush with the upper sleeve (27). A limiting plate (30) is provided on the top of the upper sleeve (27) to press the spring (29).

4. The air-cooled spreading and heat dissipation device for finished fertilizer according to claim 1, characterized in that: The width of the hood (1), that is, the distance between the two side walls of the hood (1) is greater than the width of the conveyor belt (32). Each side wall of the hood (1) is provided with a guard plate (7) perpendicular to it. The guard plate (7) is connected to the side wall to form an L-shaped structure.

5. The air-cooled spreading and heat dissipation device for finished fertilizer according to claim 1, characterized in that: The material scraper (17) is provided with adjusting rods (18) on both sides of the middle part. Each material guide side plate (16) is provided with a through hole corresponding to the adjusting rod (18). The adjusting rod (18) is provided in the through hole to realize the connection between the material scraper (17) and the material guide side plate (16). A locking nut (19) is provided at the outer end of each adjusting rod (18).

6. The air-cooled spreading and heat dissipation device for finished fertilizer according to claim 1, characterized in that: The scraper plate (17) is configured in a J-shape, and a rubber layer (31) is wrapped around the lower part of the scraper plate (17).

7. The air-cooled spreading and heat dissipation device for finished fertilizer according to claim 1, characterized in that: The exhaust pipe (5) is equipped with a filter screen (8) at one end of the air inlet.

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